diff --git a/.babelrc b/.babelrc
deleted file mode 100644
index 605b14091c4..00000000000
--- a/.babelrc
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "presets": ["es2015", "flow-vue"],
-  "plugins": ["transform-vue-jsx", "syntax-dynamic-import"],
-  "ignore": [
-    "dist/*.js",
-    "packages/**/*.js"
-  ]
-}
diff --git a/.babelrc.js b/.babelrc.js
new file mode 100644
index 00000000000..400866bfa7e
--- /dev/null
+++ b/.babelrc.js
@@ -0,0 +1,23 @@
+const babelPresetFlowVue = {
+  plugins: [
+    require('@babel/plugin-proposal-class-properties'),
+    // require('@babel/plugin-syntax-flow'), // not needed, included in transform-flow-strip-types
+    require('@babel/plugin-transform-flow-strip-types')
+  ]
+}
+
+module.exports = {
+  presets: [
+    require('@babel/preset-env'),
+    // require('babel-preset-flow-vue')
+    babelPresetFlowVue
+  ],
+  plugins: [
+    require('babel-plugin-transform-vue-jsx'),
+    require('@babel/plugin-syntax-dynamic-import')
+  ],
+  ignore: [
+    'dist/*.js',
+    'packages/**/*.js'
+  ]
+}
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0c5f49e158d..9075ab237c9 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 defaults: &defaults
   working_directory: ~/project/vue
   docker:
-    - image: circleci/node:6-browsers
+    - image: vuejs/ci
 
 jobs:
   install:
@@ -12,12 +12,12 @@ jobs:
       - checkout
       - restore_cache:
           keys:
-            - v1-vue-{{ .Branch }}-{{ checksum "package-lock.json" }}
+            - v1-vue-{{ .Branch }}-{{ checksum "yarn.lock" }}
             - v1-vue-{{ .Branch }}-
             - v1-vue-
       - run: npm install
       - save_cache:
-          key: v1-vue-{{ .Branch }}-{{ checksum "package-lock.json" }}
+          key: v1-vue-{{ .Branch }}-{{ checksum "yarn.lock" }}
           paths:
             - node_modules/
       - persist_to_workspace:
@@ -44,7 +44,7 @@ jobs:
          name: report coverage stats for non-PRs
          command: |
            if [[ -z $CI_PULL_REQUEST ]]; then
-             cat ./coverage/lcov.info | ./node_modules/.bin/codecov
+             ./node_modules/.bin/codecov
            fi
 
   test-e2e:
@@ -62,6 +62,16 @@ jobs:
       - run: npm run test:ssr
       - run: npm run test:weex
 
+  trigger-regression-test:
+    <<: *defaults
+    steps:
+      - run:
+          command: |
+            curl --user ${CIRCLE_TOKEN}: \
+            --data build_parameters[CIRCLE_JOB]=update \
+            --data build_parameters[VUE_REVISION]=${CIRCLE_SHA1} \
+            https://circleci.com/api/v1.1/project/github/vuejs/regression-testing/tree/master
+
 workflows:
   version: 2
   install-and-parallel-test:
@@ -79,3 +89,43 @@ workflows:
       - test-ssr-weex:
           requires:
             - install
+      - trigger-regression-test:
+          filters:
+            branches:
+              only:
+                - "2.6"
+                - regression-test
+          requires:
+            - test-cover
+            - lint-flow-types
+            - test-e2e
+            - test-ssr-weex
+  weekly_regression_test:
+    triggers:
+      - schedule:
+          # At 13:00 UTC (9:00 EDT) on every Monday
+          cron: "0 13 * * 1"
+          filters:
+            branches:
+              only:
+                dev
+    jobs:
+      - install
+      - test-cover:
+          requires:
+            - install
+      - lint-flow-types:
+          requires:
+            - install
+      - test-e2e:
+          requires:
+            - install
+      - test-ssr-weex:
+          requires:
+            - install
+      - trigger-regression-test:
+          requires:
+            - test-cover
+            - lint-flow-types
+            - test-e2e
+            - test-ssr-weex
diff --git a/.editorconfig b/.editorconfig
index f1cc3ad329c..01a20f16fe3 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,4 +1,4 @@
-# http://editorconfig.org
+# https://editorconfig.org
 
 root = true
 
diff --git a/.eslintrc b/.eslintrc
deleted file mode 100644
index f5845425106..00000000000
--- a/.eslintrc
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "root": true,
-  "plugins": [
-    "flowtype"
-  ],
-  "extends": [
-    "plugin:vue-libs/recommended",
-    "plugin:flowtype/recommended"
-  ],
-  "globals": {
-    "__WEEX__": true,
-    "WXEnvironment": true
-  }
-}
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000000..e27aad552a1
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,29 @@
+module.exports = {
+  root: true,
+  parserOptions: {
+    parser: require.resolve('babel-eslint'),
+    ecmaVersion: 2018,
+    sourceType: 'module'
+  },
+  env: {
+    es6: true,
+    node: true,
+    browser: true
+  },
+  plugins: [
+    "flowtype"
+  ],
+  extends: [
+    "eslint:recommended",
+    "plugin:flowtype/recommended"
+  ],
+  globals: {
+    "__WEEX__": true,
+    "WXEnvironment": true
+  },
+  rules: {
+    'no-console': process.env.NODE_ENV !== 'production' ? 0 : 2,
+    'no-useless-escape': 0,
+    'no-empty': 0
+  }
+}
diff --git a/.github/CODE_OF_CONDUCT.md b/.github/CODE_OF_CONDUCT.md
index 4ead0e1daf2..b39f08e2d28 100644
--- a/.github/CODE_OF_CONDUCT.md
+++ b/.github/CODE_OF_CONDUCT.md
@@ -2,7 +2,7 @@
 
 As contributors and maintainers of this project, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities.
 
-We are committed to making participation in this project a harassment-free experience for everyone, regardless of level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, age, or religion.
+We are committed to making participation in this project a harassment-free experience for everyone, regardless of the level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, age, or religion.
 
 Examples of unacceptable behavior by participants include the use of sexual language or imagery, derogatory comments or personal attacks, trolling, public or private harassment, insults, or other unprofessional conduct.
 
diff --git a/.github/COMMIT_CONVENTION.md b/.github/COMMIT_CONVENTION.md
index 6d2813fb663..381bf17baab 100644
--- a/.github/COMMIT_CONVENTION.md
+++ b/.github/COMMIT_CONVENTION.md
@@ -1,13 +1,13 @@
 ## Git Commit Message Convention
 
-> This is adapted from [Angular's commit convention](https://github.com/conventional-changelog/conventional-changelog/blob/master/packages/conventional-changelog-angular/convention.md).
+> This is adapted from [Angular's commit convention](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-angular).
 
 #### TL;DR:
 
 Messages must be matched by the following regex:
 
 ``` js
-/^(revert: )?(feat|fix|docs|style|refactor|perf|test|workflow|ci|chore|types)(\(.+\))?: .{1,50}/
+/^(revert: )?(feat|fix|polish|docs|style|refactor|perf|test|workflow|ci|chore|types)(\(.+\))?: .{1,50}/
 ```
 
 #### Examples
@@ -58,24 +58,24 @@ The **header** is mandatory and the **scope** of the header is optional.
 
 ### Revert
 
-If the commit reverts a previous commit, it should begin with `revert: `, followed by the header of the reverted commit. In the body it should say: `This reverts commit <hash>.`, where the hash is the SHA of the commit being reverted.
+If the commit reverts a previous commit, it should begin with `revert: `, followed by the header of the reverted commit. In the body, it should say: `This reverts commit <hash>.`, where the hash is the SHA of the commit being reverted.
 
 ### Type
 
-If the prefix is `feat`, `fix` or `perf`, it will appear in the changelog. However if there is any [BREAKING CHANGE](#footer), the commit will always appear in the changelog.
+If the prefix is `feat`, `fix` or `perf`, it will appear in the changelog. However, if there is any [BREAKING CHANGE](#footer), the commit will always appear in the changelog.
 
 Other prefixes are up to your discretion. Suggested prefixes are `docs`, `chore`, `style`, `refactor`, and `test` for non-changelog related tasks.
 
 ### Scope
 
-The scope could be anything specifying place of the commit change. For example `core`, `compiler`, `ssr`, `v-model`, `transition` etc...
+The scope could be anything specifying the place of the commit change. For example `core`, `compiler`, `ssr`, `v-model`, `transition` etc...
 
 ### Subject
 
-The subject contains succinct description of the change:
+The subject contains a succinct description of the change:
 
 * use the imperative, present tense: "change" not "changed" nor "changes"
-* don't capitalize first letter
+* don't capitalize the first letter
 * no dot (.) at the end
 
 ### Body
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index a5b9f985b6e..5368b5481bc 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -1,6 +1,6 @@
 # Vue.js Contributing Guide
 
-Hi! I’m really excited that you are interested in contributing to Vue.js. Before submitting your contribution though, please make sure to take a moment and read through the following guidelines.
+Hi! I'm really excited that you are interested in contributing to Vue.js. Before submitting your contribution, please make sure to take a moment and read through the following guidelines:
 
 - [Code of Conduct](https://github.com/vuejs/vue/blob/dev/.github/CODE_OF_CONDUCT.md)
 - [Issue Reporting Guidelines](#issue-reporting-guidelines)
@@ -14,33 +14,33 @@ Hi! I’m really excited that you are interested in contributing to Vue.js. Befo
 
 ## Pull Request Guidelines
 
-- The `master` branch is basically just a snapshot of the latest stable release. All development should be done in dedicated branches. **Do not submit PRs against the `master` branch.**
+- The `master` branch is just a snapshot of the latest stable release. All development should be done in dedicated branches. **Do not submit PRs against the `master` branch.**
 
 - Checkout a topic branch from the relevant branch, e.g. `dev`, and merge back against that branch.
 
 - Work in the `src` folder and **DO NOT** checkin `dist` in the commits.
 
-- It's OK to have multiple small commits as you work on the PR - we will let GitHub automatically squash it before merging.
+- It's OK to have multiple small commits as you work on the PR - GitHub will automatically squash it before merging.
 
 - Make sure `npm test` passes. (see [development setup](#development-setup))
 
-- If adding new feature:
+- If adding a new feature:
   - Add accompanying test case.
-  - Provide convincing reason to add this feature. Ideally you should open a suggestion issue first and have it greenlighted before working on it.
+  - Provide a convincing reason to add this feature. Ideally, you should open a suggestion issue first and have it approved before working on it.
 
-- If fixing a bug:
-  - If you are resolving a special issue, add `(fix #xxxx[,#xxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `update entities encoding/decoding (fix #3899)`.
-  - Provide detailed description of the bug in the PR. Live demo preferred.
+- If fixing bug:
+  - If you are resolving a special issue, add `(fix #xxxx[,#xxxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `update entities encoding/decoding (fix #3899)`.
+  - Provide a detailed description of the bug in the PR. Live demo preferred.
   - Add appropriate test coverage if applicable.
 
 ## Development Setup
 
-You will need [Node.js](http://nodejs.org) **version 6+** and [Java Runtime Environment](http://www.oracle.com/technetwork/java/javase/downloads/index.html) (needed for running Selenium server during e2e tests).
+You will need [Node.js](http://nodejs.org) **version 8+**, [Java Runtime Environment](http://www.oracle.com/technetwork/java/javase/downloads/index.html) (for running Selenium server during e2e tests) and [yarn](https://yarnpkg.com/en/docs/install).
 
 After cloning the repo, run:
 
 ``` bash
-$ npm install # or yarn
+$ yarn # install the dependencies of the project
 ```
 
 ### Committing Changes
@@ -59,17 +59,17 @@ $ npm run dev:test
 # build all dist files, including npm packages
 $ npm run build
 
-# run the full test suite, include linting / type checking
+# run the full test suite, including linting/type checking
 $ npm test
 ```
 
 There are some other scripts available in the `scripts` section of the `package.json` file.
 
-The default test script will do the following: lint with ESLint -> type check with Flow -> unit tests with coverage -> e2e tests. **Please make sure to have this pass successfully before submitting a PR.** Although the same tests will be run against your PR on the CI server, it is better to have it working locally beforehand.
+The default test script will do the following: lint with ESLint -> type check with Flow -> unit tests with coverage -> e2e tests. **Please make sure to have this pass successfully before submitting a PR.** Although the same tests will be run against your PR on the CI server, it is better to have it working locally.
 
 ## Project Structure
 
-- **`scripts`**: contains build-related scripts and configuration files. In most cases you don't need to touch them. However, it would be helpful to familiarize yourself with the following files:
+- **`scripts`**: contains build-related scripts and configuration files. Usually, you don't need to touch them. However, it would be helpful to familiarize yourself with the following files:
 
   - `scripts/alias.js`: module import aliases used across all source code and tests.
 
@@ -85,15 +85,15 @@ The default test script will do the following: lint with ESLint -> type check wi
 
 - **`test`**: contains all tests. The unit tests are written with [Jasmine](http://jasmine.github.io/2.3/introduction.html) and run with [Karma](http://karma-runner.github.io/0.13/index.html). The e2e tests are written for and run with [Nightwatch.js](http://nightwatchjs.org/).
 
-- **`src`**: contains the source code, obviously. The codebase is written in ES2015 with [Flow](https://flowtype.org/) type annotations.
+- **`src`**: contains the source code. The codebase is written in ES2015 with [Flow](https://flowtype.org/) type annotations.
 
   - **`compiler`**: contains code for the template-to-render-function compiler.
 
-    The compiler consists of a parser (converts template strings to element ASTs), an optimizer (detects static trees for vdom render optimization), and a code generator (generate render function code from element ASTs). Note the codegen directly generates code strings from the element AST - it's done this way for smaller code size because the compiler is shipped to the browser in the standalone build.
+    The compiler consists of a parser (converts template strings to element ASTs), an optimizer (detects static trees for vdom render optimization), and a code generator (generate render function code from element ASTs). Note that codegen directly generates code strings from the element AST - it's done this way for smaller code size because the compiler is shipped to the browser in the standalone build.
 
   - **`core`**: contains universal, platform-agnostic runtime code.
 
-    The Vue 2.0 core is platform-agnostic - which means code inside `core` should be able to run in any JavaScript environment, be it the browser, Node.js, or an embedded JavaScript runtime in native applications.
+    The Vue 2.0 core is platform-agnostic. That is, the code inside `core` is able to be run in any JavaScript environment, be it the browser, Node.js, or an embedded JavaScript runtime in native applications.
 
     - **`observer`**: contains code related to the reactivity system.
 
@@ -101,9 +101,9 @@ The default test script will do the following: lint with ESLint -> type check wi
 
     - **`instance`**: contains Vue instance constructor and prototype methods.
 
-    - **`global-api`**: as the name suggests.
+    - **`global-api`**: contains Vue global api.
 
-    - **`components`**: universal abstract components. Currently `keep-alive` is the only one.
+    - **`components`**: contains universal abstract components.
 
   - **`server`**: contains code related to server-side rendering.
 
@@ -111,7 +111,7 @@ The default test script will do the following: lint with ESLint -> type check wi
 
     Entry files for dist builds are located in their respective platform directory.
 
-    Each platform module contains three parts: `compiler`, `runtime` and `server`, corresponding to the three directories above. Each part contains platform-specific modules/utilities which are then imported and injected to the core counterparts in platform-specific entry files. For example, the code implementing the logic behind `v-bind:class` is in `platforms/web/runtime/modules/class.js` - which is imported in `entries/web-runtime.js` and used to create the browser-specific vdom patching function.
+    Each platform module contains three parts: `compiler`, `runtime` and `server`, corresponding to the three directories above. Each part contains platform-specific modules/utilities which are imported and injected to the core counterparts in platform-specific entry files. For example, the code implementing the logic behind `v-bind:class` is in `platforms/web/runtime/modules/class.js` - which is imported in `entries/web-runtime.js` and used to create the browser-specific vdom patching function.
 
   - **`sfc`**: contains single-file component (`*.vue` files) parsing logic. This is used in the `vue-template-compiler` package.
 
@@ -119,22 +119,15 @@ The default test script will do the following: lint with ESLint -> type check wi
 
   - **`types`**: contains TypeScript type definitions
 
-    - **`test`**: type definitions tests
+    - **`test`**: contains type definitions tests
 
 
 ## Financial Contribution
 
-As a pure community-driven project without major corporate backing, we also welcome financial contributions via Patreon or OpenCollective.
-
-- [Become a backer or sponsor on Patreon](https://www.patreon.com/evanyou)
-- [Become a backer or sponsor on OpenCollective](https://opencollective.com/vuejs)
-
-### What's the difference between Patreon and OpenCollective?
-
-Funds donated via Patreon goes directly to support Evan You's full-time work on Vue.js. Funds donated via OpenCollective are managed with transparent expenses and will be used for compensating work and expenses by core team members or sponsoring community events. Your name/logo will receive proper recognition and exposure by donating on either platform.
+As a pure community-driven project without major corporate backing, we also welcome financial contributions via GitHub Sponsors and OpenCollective. Please consult the [Sponsor Page](https://vuejs.org/sponsor/) for more details.
 
 ## Credits
 
-Thank you to all the people who have already contributed to vuejs!
+Thank you to all the people who have already contributed to Vue.js!
 
 <a href="https://github.com/vuejs/vue/graphs/contributors"><img src="https://opencollective.com/vuejs/contributors.svg?width=890" /></a>
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 00000000000..652c1192b7b
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,8 @@
+# These are supported funding model platforms
+
+github: [yyx990803, posva]
+patreon: evanyou
+open_collective: vuejs
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/vue
+custom: # Replace with a single custom sponsorship URL
diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
deleted file mode 100644
index cb7f961992c..00000000000
--- a/.github/ISSUE_TEMPLATE.md
+++ /dev/null
@@ -1,16 +0,0 @@
-<!--
-IMPORTANT: Please use the following link to create a new issue:
-
-  https://new-issue.vuejs.org/
-
-If your issue was not created using the app above, it will be closed immediately.
-
-中文用户请注意：
-请使用上面的链接来创建新的 issue。如果不是用上述工具创建的 issue 会被自动关闭。
--->
-
-<!--
-Love vuejs? Please consider supporting us via Patreon or OpenCollective:
-👉  https://www.patreon.com/evanyou
-👉  https://opencollective.com/vuejs/donate
--->
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 00000000000..675eea91e7c
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Create new issue
+    url: https://new-issue.vuejs.org/
+    about: Please use the following link to create a new issue.
+  - name: Patreon
+    url: https://www.patreon.com/evanyou
+    about: Love Vue.js? Please consider supporting us via Patreon.
+  - name: Open Collective
+    url: https://opencollective.com/vuejs/donate
+    about: Love Vue.js? Please consider supporting us via Open Collective.
diff --git a/BACKERS.md b/BACKERS.md
index b220d849f94..fa66d206698 100644
--- a/BACKERS.md
+++ b/BACKERS.md
@@ -1,323 +1,9 @@
 <h1 align="center">Sponsors &amp; Backers</h1>
 
-Vue.js is an MIT-licensed open source project. It's an independent project with its ongoing development made possible entirely thanks to the support by these awesome [backers](https://github.com/vuejs/vue/blob/dev/BACKERS.md). If you'd like to join them, please consider:
+Vue.js is an MIT-licensed open source project with its ongoing development made possible entirely by the support of the awesome sponsors and backers listed in this file. If you'd like to join them, please consider [ sponsor Vue's development](https://vuejs.org/sponsor/).
 
-- [Become a backer or sponsor on Patreon](https://www.patreon.com/evanyou).
-- [Become a backer or sponsor on OpenCollective](https://opencollective.com/vuejs).
-- [One-time donation via PayPal or crypto-currencies.](https://vuejs.org/support-vuejs/#One-time-Donations)
-
-#### What's the difference between Patreon and OpenCollective?
-
-Funds donated via Patreon goes directly to support Evan You's full-time work on Vue.js. Funds donated via OpenCollective are managed with transparent expenses and will be used for compensating work and expenses by core team members or sponsoring community events. Your name/logo will receive proper recognition and exposure by donating on either platform.
-
-<br><br>
-
-<h2 align="center">Platinum via Patreon</h2>
-
-<!--platinum start-->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://stdlib.com" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/stdlib.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://xiaozhuanlan.com" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/cn.vuejs.org/master/themes/vue/source/images/xiaozhuanlan.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="http://tooltwist.com/" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/tooltwist.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vueschool.io/?utm_source=Vuejs.org&utm_medium=Banner&utm_campaign=Sponsored%20Banner&utm_content=V1" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vueschool.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://www.datacamp.com/careers?utm_source=vuejs&utm_medium=sidebar" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/datacamp.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-  </tbody>
-</table>
-<!--platinum end-->
-
-<h2 align="center">Platinum via OpenCollective</h2>
-
-<a href="https://opencollective.com/vuejs/tiers/platinum-sponsors/0/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/platinum-sponsors/0/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/platinum-sponsors/1/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/platinum-sponsors/1/avatar.svg"></a>
-
-<h2 align="center">Gold via Patreon</h2>
-
-<!--gold start-->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://laravel.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/laravel.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://htmlburger.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/htmlburger.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://chaitin.cn/en/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/chaitin.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="http://monterail.com/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/monterail.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://anymod.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/anymod.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://www.frontenddeveloperlove.com/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/frontend-love.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://onsen.io/vue/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/onsen-ui.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vuetifyjs.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vuetify.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://neds.com.au/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/neds.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vuejobs.com/?ref=vuejs" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vuejobs.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://leanpub.com/vuejs2" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/tmvuejs2.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-  </tbody>
-</table>
-<!--gold end-->
-
-<h2 align="center">Gold via OpenCollective</h2>
-
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/0/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/0/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/1/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/1/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/2/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/2/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/3/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/3/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/4/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/4/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/5/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/5/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/6/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/6/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/7/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/7/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/8/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/8/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/9/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/9/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/10/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/10/avatar.svg" height="60px"></a>
-
-<h2 align="center">Silver via Patreon</h2>
-
-- Matt Mullenweg
-
-<h2 align="center">Bronze via Patreon</h2>
-
-<!--bronze start-->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="http://tighten.co/" target="_blank">
-          <img width="148px" src="http://i.imgur.com/T7fQYLT.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://alligator.io" target="_blank">
-          <img width="148px" src="https://alligator.io/images/alligator-logo.svg">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://www.accelebrate.com/" target="_blank">
-          <img width="148px" src="https://www.accelebrate.com/assets/images/accelebrate_logo@2x.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://pullstring.com" target="_blank">
-          <img width="148px" src="https://i.imgur.com/hQHW6TB.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-  </tbody>
-</table>
-<!--bronze end-->
-
-<h2 align="center">Bronze via OpenCollective</h2>
-
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/0/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/0/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/1/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/1/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/2/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/2/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/3/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/3/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/4/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/4/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/5/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/5/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/6/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/6/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/7/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/7/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/8/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/8/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/9/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/9/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/10/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/10/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/11/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/11/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/12/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/12/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/13/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/13/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/14/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/14/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/15/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/15/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/16/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/16/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/17/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/17/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/18/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/18/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/19/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/19/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/20/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/20/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/21/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/21/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/22/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/22/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/23/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/23/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/24/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/24/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/25/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/25/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/26/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/26/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/27/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/27/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/28/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/28/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/bronze-sponsors/29/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/bronze-sponsors/29/avatar.svg"></a>
-
-<h2 align="center">Generous Backers via Patreon ($50+)</h2>
-
-<!--50 start-->
-- Wasim Khamlichi
-- errorrik
-- Alex Balashov
-- Konstantin Levinski
-- Samuel Smith
-- HARRI J SALOMAA
-- tjkoury
-- Evan Leonardi
-<!--50 end-->
-
-<h2 align="center">Backers via Patreon</h2>
-
-<!--10 start-->
-- Luca Borghini
-- kazuya kawaguchi
-- Keisuke KITA
-- Jack Barham
-- Santa Cruz
-- Tom Conlon
-- Simon East
-- Henry Zhu
-- Benjamin Listwon
-- Lars Andreas Ness
-- Victor Tolbert
-- Frank Dugan III
-- Stephen Hartley
-- Wen-Tien Chang
-- Chestnut Hill
-- Kirk Lewis
-- Karol F
-- Miljan Aleksic
-- 叶解
-- Paul Straw
-- Jake Ingman
-- Barbara Liau
-- Isaac Sant
-- Milos Stojanovic
-- 4
-- The Graphic Design School
-- Christian Griffith
-- Jarek Tkaczyk
-- Andrew Davis
-- Sean MacIsaac
-- Xiaojie LI
-- David Hess
-- Niannian Modisette
-- Dariusz Jastrzębski
-- Matt Jones
-- Dave Chenell
-- Cheng-Wei Chien
-- Duncan J Kenzie
-- Mike Margerum
-- Guy Gavergun
-- Edithvale
-- Intevation GmbH
-- Luiz Eduardo  Tanure Bacelar
-- Chengzhi Yin
-- Dan Barrett
-- Zoran Knezevic
-- James Simpson
-- Pierre Vanhulst
-- Vincent Gabriel
-- Chris Anderson
-- Jon Hobbs-Smith
-- Akiho Nagao
-- Asaf Yishai
-- Estebe Anthony
-- Haim Yulzari
-- David McGuigan
-- Jeremy Tan
-- Jim Raden
-- Fille Åström
-- Nicholas Reid
-- Tyler Scott
-- Thong Yong Jun
-- Tai Shi Lgin
-- Bryan Gruneberg
-- Roman Kuba
-- Matthew McMillion
-- Familiar Studio
-- Matias Verdier
-- Jamie McElwain
-- Vivekanandhan Natarajan
-- Alejandro Mohamad
-- Rafael Belvederese
-- Mickaël Andrieu
-- Guilherme S L de Souza
-- Rob Yedlin
-- Daniel Waghorn
-- Eric Githinji
-- Chih-Hsuan, Fan
-- Jordan Oroshiba
-- Brian Jorden
-- Cliff Hess
-- Joe Ray Gregory
-- Johnny Eshan
-- Orney Enrique martinez Said
-- Tom Striker
-- Oskar Lindgren
-- RADD Creative
-- Maegan Wilson
-- Rua Cura D'ars
-- Richard Simpson
-- Charles McKeever
-- Alok Pant
-- Jessie Hernandez
-- Eric Fong
-- Aparajita Fishman
-<!--10 end-->
-
-<h2 align="center">Backers via OpenCollective</h2>
-
-<a href="https://opencollective.com/vuejs#backers" target="_blank"><img src="https://opencollective.com/vuejs/backers.svg?width=890"></a>
+<p align="center">
+  <a target="_blank" href="https://sponsors.vuejs.org/backers.svg">
+    <img alt="sponsors" src="https://sponsors.vuejs.org/backers.svg">
+  </a>
+</p>
diff --git a/README.md b/README.md
index 5a0a2f3b647..ed68ab8bbbc 100644
--- a/README.md
+++ b/README.md
@@ -1,150 +1,27 @@
-<p align="center"><a href="https://vuejs.org" target="_blank"><img width="100" src="https://vuejs.org/images/logo.png" alt="Vue logo"></a></p>
+<p align="center"><a href="https://vuejs.org" target="_blank" rel="noopener noreferrer"><img width="100" src="https://vuejs.org/images/logo.png" alt="Vue logo"></a></p>
 
 <p align="center">
-  <a href="https://circleci.com/gh/vuejs/vue/tree/dev"><img src="https://img.shields.io/circleci/project/vuejs/vue/dev.svg" alt="Build Status"></a>
-  <a href="https://codecov.io/github/vuejs/vue?branch=dev"><img src="https://img.shields.io/codecov/c/github/vuejs/vue/dev.svg" alt="Coverage Status"></a>
-  <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/dm/vue.svg" alt="Downloads"></a>
-  <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/v/vue.svg" alt="Version"></a>
-  <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/l/vue.svg" alt="License"></a>
-  <a href="https://chat.vuejs.org/"><img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg" alt="Chat"></a>
-  <br>
-  <a href="https://saucelabs.com/u/vuejs"><img src="https://saucelabs.com/browser-matrix/vuejs.svg" alt="Sauce Test Status"></a>
+  <a href="https://circleci.com/gh/vuejs/vue/tree/dev"><img src="https://img.shields.io/circleci/project/github/vuejs/vue/dev.svg?sanitize=true" alt="Build Status"></a>
+  <a href="https://codecov.io/github/vuejs/vue?branch=dev"><img src="https://img.shields.io/codecov/c/github/vuejs/vue/dev.svg?sanitize=true" alt="Coverage Status"></a>
+  <a href="https://npmcharts.com/compare/vue?minimal=true"><img src="https://img.shields.io/npm/dm/vue.svg?sanitize=true" alt="Downloads"></a>
+  <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/v/vue.svg?sanitize=true" alt="Version"></a>
+  <a href="https://www.npmjs.com/package/vue"><img src="https://img.shields.io/npm/l/vue.svg?sanitize=true" alt="License"></a>
+  <a href="https://chat.vuejs.org/"><img src="https://img.shields.io/badge/chat-on%20discord-7289da.svg?sanitize=true" alt="Chat"></a>
 </p>
 
-<h2 align="center">Supporting Vue.js</h2>
-
-Vue.js is an MIT-licensed open source project. It's an independent project with its ongoing development made possible entirely thanks to the support by these awesome [backers](https://github.com/vuejs/vue/blob/dev/BACKERS.md). If you'd like to join them, please consider:
-
-- [Become a backer or sponsor on Patreon](https://www.patreon.com/evanyou).
-- [Become a backer or sponsor on Open Collective](https://opencollective.com/vuejs).
-- [One-time donation via PayPal or crypto-currencies.](https://vuejs.org/support-vuejs/#One-time-Donations)
-
-#### What's the difference between Patreon and OpenCollective?
-
-Funds donated via Patreon goes directly to support Evan You's full-time work on Vue.js. Funds donated via OpenCollective are managed with transparent expenses and will be used for compensating work and expenses by core team members or sponsoring community events. Your name/logo will receive proper recognition and exposure by donating on either platform.
-
-<h3 align="center">Sponsors via Patreon</h3>
-
-<h4 align="center">Platinum</h4>
-
-<!--platinum start-->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://stdlib.com" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/stdlib.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://xiaozhuanlan.com" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/cn.vuejs.org/master/themes/vue/source/images/xiaozhuanlan.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="http://tooltwist.com/" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/tooltwist.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vueschool.io/?utm_source=Vuejs.org&utm_medium=Banner&utm_campaign=Sponsored%20Banner&utm_content=V1" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vueschool.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://www.datacamp.com/careers?utm_source=vuejs&utm_medium=sidebar" target="_blank">
-          <img width="222px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/datacamp.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-  </tbody>
-</table>
-<!--platinum end-->
-
-<h4 align="center">Gold</h4>
-
-<!--gold start-->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://laravel.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/laravel.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://htmlburger.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/htmlburger.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://chaitin.cn/en/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/chaitin.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="http://monterail.com/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/monterail.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://anymod.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/anymod.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://www.frontenddeveloperlove.com/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/frontend-love.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-    <tr>
-      <td align="center" valign="middle">
-        <a href="https://onsen.io/vue/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/onsen-ui.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vuetifyjs.com" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vuetify.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://neds.com.au/" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/neds.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://vuejobs.com/?ref=vuejs" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/vuejobs.png">
-        </a>
-      </td>
-      <td align="center" valign="middle">
-        <a href="https://leanpub.com/vuejs2" target="_blank">
-          <img width="148px" src="https://raw.githubusercontent.com/vuejs/vuejs.org/master/themes/vue/source/images/tmvuejs2.png">
-        </a>
-      </td>
-    </tr><tr></tr>
-  </tbody>
-</table>
-<!--gold end-->
-
-<h3 align="center">Sponsors via <a href="https://opencollective.com/vuejs">Open Collective</a></h3>
-
-<h4 align="center">Platinum</h4>
-
-<a href="https://opencollective.com/vuejs/tiers/platinum-sponsors/0/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/platinum-sponsors/0/avatar.svg"></a>
-<a href="https://opencollective.com/vuejs/tiers/platinum-sponsors/1/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/platinum-sponsors/1/avatar.svg"></a>
-
-<h4 align="center">Gold</h4>
-
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/0/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/0/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/1/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/1/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/2/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/2/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/3/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/3/avatar.svg" height="60px"></a>
-<a href="https://opencollective.com/vuejs/tiers/gold-sponsors/4/website" target="_blank"><img src="https://opencollective.com/vuejs/tiers/gold-sponsors/4/avatar.svg" height="60px"></a>
+## This repo is for Vue 2
+
+You are looking at the repository for Vue 2. The repo for Vue 3 is [vuejs/core](https://github.com/vuejs/core).
+
+## Sponsors
+
+Vue.js is an MIT-licensed open source project with its ongoing development made possible entirely by the support of these awesome [backers](https://github.com/vuejs/core/blob/main/BACKERS.md). If you'd like to join them, please consider [ sponsor Vue's development](https://vuejs.org/sponsor/).
+
+<p align="center">
+  <a target="_blank" href="https://vuejs.org/sponsor/#current-sponsors">
+    <img alt="sponsors" src="https://sponsors.vuejs.org/sponsors.svg">
+  </a>
+</p>
 
 ---
 
@@ -154,20 +31,20 @@ Vue (pronounced `/vjuː/`, like view) is a **progressive framework** for buildin
 
 #### Browser Compatibility
 
-Vue.js supports all browsers that are [ES5-compliant](http://kangax.github.io/compat-table/es5/) (IE8 and below are not supported).
+Vue.js supports all browsers that are [ES5-compliant](https://kangax.github.io/compat-table/es5/) (IE8 and below are not supported).
 
 ## Ecosystem
 
-| Project | Status | Description |
-|---------|--------|-------------|
-| [vue-router]          | [![vue-router-status]][vue-router-package] | Single-page application routing |
-| [vuex]                | [![vuex-status]][vuex-package] | Large-scale state management |
-| [vue-cli]             | [![vue-cli-status]][vue-cli-package] | Project scaffolding |
-| [vue-loader]          | [![vue-loader-status]][vue-loader-package] | Single File Component (`*.vue` file) loader for webpack |
-| [vue-server-renderer] | [![vue-server-renderer-status]][vue-server-renderer-package] | Server-side rendering support |
-| [vue-class-component] | [![vue-class-component-status]][vue-class-component-package] | TypeScript decorator for a class-based API |
-| [vue-rx]              | [![vue-rx-status]][vue-rx-package] | RxJS integration |
-| [vue-devtools]        | [![vue-devtools-status]][vue-devtools-package] | Browser DevTools extension |
+| Project               | Status                                                       | Description                                             |
+| --------------------- | ------------------------------------------------------------ | ------------------------------------------------------- |
+| [vue-router]          | [![vue-router-status]][vue-router-package]                   | Single-page application routing                         |
+| [vuex]                | [![vuex-status]][vuex-package]                               | Large-scale state management                            |
+| [vue-cli]             | [![vue-cli-status]][vue-cli-package]                         | Project scaffolding                                     |
+| [vue-loader]          | [![vue-loader-status]][vue-loader-package]                   | Single File Component (`*.vue` file) loader for webpack |
+| [vue-server-renderer] | [![vue-server-renderer-status]][vue-server-renderer-package] | Server-side rendering support                           |
+| [vue-class-component] | [![vue-class-component-status]][vue-class-component-package] | TypeScript decorator for a class-based API              |
+| [vue-rx]              | [![vue-rx-status]][vue-rx-package]                           | RxJS integration                                        |
+| [vue-devtools]        | [![vue-devtools-status]][vue-devtools-package]               | Browser DevTools extension                              |
 
 [vue-router]: https://github.com/vuejs/vue-router
 [vuex]: https://github.com/vuejs/vuex
@@ -176,20 +53,18 @@ Vue.js supports all browsers that are [ES5-compliant](http://kangax.github.io/co
 [vue-server-renderer]: https://github.com/vuejs/vue/tree/dev/packages/vue-server-renderer
 [vue-class-component]: https://github.com/vuejs/vue-class-component
 [vue-rx]: https://github.com/vuejs/vue-rx
-[vue-devtools]:  https://github.com/vuejs/vue-devtools
-
+[vue-devtools]: https://github.com/vuejs/vue-devtools
 [vue-router-status]: https://img.shields.io/npm/v/vue-router.svg
 [vuex-status]: https://img.shields.io/npm/v/vuex.svg
-[vue-cli-status]: https://img.shields.io/npm/v/vue-cli.svg
+[vue-cli-status]: https://img.shields.io/npm/v/@vue/cli.svg
 [vue-loader-status]: https://img.shields.io/npm/v/vue-loader.svg
 [vue-server-renderer-status]: https://img.shields.io/npm/v/vue-server-renderer.svg
 [vue-class-component-status]: https://img.shields.io/npm/v/vue-class-component.svg
 [vue-rx-status]: https://img.shields.io/npm/v/vue-rx.svg
 [vue-devtools-status]: https://img.shields.io/chrome-web-store/v/nhdogjmejiglipccpnnnanhbledajbpd.svg
-
 [vue-router-package]: https://npmjs.com/package/vue-router
 [vuex-package]: https://npmjs.com/package/vuex
-[vue-cli-package]: https://npmjs.com/package/vue-cli
+[vue-cli-package]: https://npmjs.com/package/@vue/cli
 [vue-loader-package]: https://npmjs.com/package/vue-loader
 [vue-server-renderer-package]: https://npmjs.com/package/vue-server-renderer
 [vue-class-component-package]: https://npmjs.com/package/vue-class-component
@@ -202,7 +77,7 @@ To check out [live examples](https://vuejs.org/v2/examples/) and docs, visit [vu
 
 ## Questions
 
-For questions and support please use the [the official forum](http://forum.vuejs.org) or [community chat](https://chat.vuejs.org/). The issue list of this repo is **exclusively** for bug reports and feature requests.
+For questions and support please use [the official forum](https://forum.vuejs.org) or [community chat](https://chat.vuejs.org/). The issue list of this repo is **exclusively** for bug reports and feature requests.
 
 ## Issues
 
@@ -220,15 +95,14 @@ Detailed changes for each release are documented in the [release notes](https://
 
 ## Contribution
 
-Please make sure to read the [Contributing Guide](https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md) before making a pull request. If you have a Vue-related project/component/tool, add it with a pull-request to [this curated list](https://github.com/vuejs/awesome-vue)!
+Please make sure to read the [Contributing Guide](https://github.com/vuejs/vue/blob/dev/.github/CONTRIBUTING.md) before making a pull request. If you have a Vue-related project/component/tool, add it with a pull request to [this curated list](https://github.com/vuejs/awesome-vue)!
 
 Thank you to all the people who already contributed to Vue!
 
 <a href="https://github.com/vuejs/vue/graphs/contributors"><img src="https://opencollective.com/vuejs/contributors.svg?width=890" /></a>
 
-
 ## License
 
-[MIT](http://opensource.org/licenses/MIT)
+[MIT](https://opensource.org/licenses/MIT)
 
 Copyright (c) 2013-present, Yuxi (Evan) You
diff --git a/benchmarks/reorder-list/index.html b/benchmarks/reorder-list/index.html
index 81b5a26d0d8..668160b0719 100644
--- a/benchmarks/reorder-list/index.html
+++ b/benchmarks/reorder-list/index.html
@@ -15,7 +15,7 @@
 
     <script type="text/x-template" id="t">
       <div>
-        <h1>{{ total }} Components</h1>
+        <h1>{{ items.length }} Components</h1>
         <p>{{ action }} took {{time}}ms.</p>
         <button @click="shuffle">shuffle</button>
         <button @click="add">add</button>
diff --git a/benchmarks/ssr/README.md b/benchmarks/ssr/README.md
index 2f0529c1fd8..c61d6daa57d 100644
--- a/benchmarks/ssr/README.md
+++ b/benchmarks/ssr/README.md
@@ -2,7 +2,7 @@
 
 This benchmark renders a table of 1000 rows with 10 columns (10k components), with around 30k normal elements on the page. Note this is not something likely to be seen in a typical app. This benchmark is mostly for stress/regression testing and comparing between `renderToString` and `renderToStream`.
 
-To view the results follow the run section. Note that the overall completion time for the results are variable, this is due to other system related variants at run time (available memory, processing power, etc). In ideal circumstances both should finish within similar results.
+To view the results follow the run section. Note that the overall completion time for the results is variable, this is due to other system related variants at run time (available memory, processing power, etc). In ideal circumstances, both should finish within similar results.
 
 `renderToStream` pipes the content through a stream which provides considerable performance benefits (faster time-to-first-byte and non-event-loop-blocking) over `renderToString`. This can be observed through the benchmark.
 
diff --git a/benchmarks/ssr/common.js b/benchmarks/ssr/common.js
index 688832f6dda..0411ac896dc 100644
--- a/benchmarks/ssr/common.js
+++ b/benchmarks/ssr/common.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const self = (global || root)
+const self = (global || root) // eslint-disable-line
 
 self.performance = {
   now: function () {
@@ -35,11 +35,11 @@ module.exports = {
         }
       },
       // template: '<table><tr v-for="row in grid"><th>123</th><td v-for="item in row.items">{{ item.id }}</td></tr></table>',
-      template: '<table width="100%" cellspacing="2"><row v-for="row in grid" :row="row"></row></table>',
+      template: '<table width="100%" cellspacing="2"><row v-for="row in grid" :key="row.id" :row="row"></row></table>',
       components: {
         row: {
           props: ['row'],
-          template: '<tr><th>{{ Math.random() }}</th><column v-for="item in row.items"></column></tr>',
+          template: '<tr><th>{{ Math.random() }}</th><column v-for="item in row.items" :key="item.id"></column></tr>',
           components: {
             column: {
               template: '<td class="item">' +
diff --git a/benchmarks/uptime/index.html b/benchmarks/uptime/index.html
index 4a375152cf2..d43c93010a6 100644
--- a/benchmarks/uptime/index.html
+++ b/benchmarks/uptime/index.html
@@ -38,7 +38,7 @@
       .days {
         display: flex;
         flex-direction: row;
-        flex-flow: wrap;
+        flex-wrap: wrap;
       }
 
       .uptime-day {
@@ -82,7 +82,7 @@
     </div>
     <script src="../../dist/vue.min.js"></script>
     <script>
-      // functional components are prefect for small, presentational components
+      // functional components are perfect for small, presentational components
       // and they are much more efficient than stateful ones.
       Vue.component('uptime-day', {
         props: ['day'],
diff --git a/dist/README.md b/dist/README.md
index 6b2068395e7..19386ecf311 100644
--- a/dist/README.md
+++ b/dist/README.md
@@ -9,7 +9,7 @@
 
 ### Terms
 
-- **Full**: builds that contains both the compiler and the runtime.
+- **Full**: builds that contain both the compiler and the runtime.
 
 - **Compiler**: code that is responsible for compiling template strings into JavaScript render functions.
 
@@ -25,7 +25,7 @@
 
 If you need to compile templates on the fly (e.g. passing a string to the `template` option, or mounting to an element using its in-DOM HTML as the template), you will need the compiler and thus the full build.
 
-When using `vue-loader` or `vueify`, templates inside `*.vue` files are compiled into JavaScript at build time. You don't really need the compiler in the final bundle, and can therefore use the runtime-only build.
+When using `vue-loader` or `vueify`, templates inside `*.vue` files are compiled into JavaScript at build time. You don't really need the compiler in the final bundle, and can therefore, use the runtime-only build.
 
 Since the runtime-only builds are roughly 30% lighter-weight than their full-build counterparts, you should use it whenever you can. If you wish to use the full build instead, you need to configure an alias in your bundler.
 
@@ -40,7 +40,7 @@ module.exports = {
     }
   }
 }
-````
+```
 
 #### Rollup
 
@@ -90,9 +90,7 @@ module.exports = {
   plugins: [
     // ...
     new webpack.DefinePlugin({
-      'process.env': {
-        NODE_ENV: JSON.stringify('production')
-      }
+      'process.env.NODE_ENV': JSON.stringify('production')
     })
   ]
 }
diff --git a/dist/vue.common.dev.js b/dist/vue.common.dev.js
new file mode 100644
index 00000000000..eb4648163b1
--- /dev/null
+++ b/dist/vue.common.dev.js
@@ -0,0 +1,12008 @@
+/*!
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
+ * Released under the MIT License.
+ */
+'use strict';
+
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Generate a string containing static keys from compiler modules.
+ */
+function genStaticKeys (modules) {
+  return modules.reduce(function (keys, m) {
+    return keys.concat(m.staticKeys || [])
+  }, []).join(',')
+}
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: "development" !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: "development" !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+{
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (!config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+{
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && "development" !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i], vm);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+  if (!valid && haveExpectedTypes) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+function assertType (value, type, vm) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+var functionTypeCheckRE = /^\s*function (\w+)/;
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(functionTypeCheckRE);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += " with value " + (styleValue(value, expectedType));
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + (styleValue(value, receivedType)) + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+var mark;
+var measure;
+
+{
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+{
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    var vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  } else {
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+  return eventKeyCode === undefined
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (!config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = expOrFn.toString();
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        var info = "callback for watcher \"" + (this.expression) + "\"";
+        invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+      pushTarget();
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+      popTarget();
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    {
+      initProxy(vm);
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (!(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var entry = cache[key];
+    if (entry) {
+      var name = entry.name;
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var entry = cache[key];
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  methods: {
+    cacheVNode: function cacheVNode() {
+      var ref = this;
+      var cache = ref.cache;
+      var keys = ref.keys;
+      var vnodeToCache = ref.vnodeToCache;
+      var keyToCache = ref.keyToCache;
+      if (vnodeToCache) {
+        var tag = vnodeToCache.tag;
+        var componentInstance = vnodeToCache.componentInstance;
+        var componentOptions = vnodeToCache.componentOptions;
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag: tag,
+          componentInstance: componentInstance,
+        };
+        keys.push(keyToCache);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+        this.vnodeToCache = null;
+      }
+    }
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.cacheVNode();
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  updated: function updated () {
+    this.cacheVNode();
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        // delay setting the cache until update
+        this.vnodeToCache = vnode;
+        this.keyToCache = key;
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.14';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isPreTag = function (tag) { return tag === 'pre'; };
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur, vnode.data.pre);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value, isInPre) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+function parseFilters (exp) {
+  var inSingle = false;
+  var inDouble = false;
+  var inTemplateString = false;
+  var inRegex = false;
+  var curly = 0;
+  var square = 0;
+  var paren = 0;
+  var lastFilterIndex = 0;
+  var c, prev, i, expression, filters;
+
+  for (i = 0; i < exp.length; i++) {
+    prev = c;
+    c = exp.charCodeAt(i);
+    if (inSingle) {
+      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+    } else if (inDouble) {
+      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+    } else if (inTemplateString) {
+      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+    } else if (inRegex) {
+      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+    } else if (
+      c === 0x7C && // pipe
+      exp.charCodeAt(i + 1) !== 0x7C &&
+      exp.charCodeAt(i - 1) !== 0x7C &&
+      !curly && !square && !paren
+    ) {
+      if (expression === undefined) {
+        // first filter, end of expression
+        lastFilterIndex = i + 1;
+        expression = exp.slice(0, i).trim();
+      } else {
+        pushFilter();
+      }
+    } else {
+      switch (c) {
+        case 0x22: inDouble = true; break         // "
+        case 0x27: inSingle = true; break         // '
+        case 0x60: inTemplateString = true; break // `
+        case 0x28: paren++; break                 // (
+        case 0x29: paren--; break                 // )
+        case 0x5B: square++; break                // [
+        case 0x5D: square--; break                // ]
+        case 0x7B: curly++; break                 // {
+        case 0x7D: curly--; break                 // }
+      }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !validDivisionCharRE.test(p)) {
+          inRegex = true;
+        }
+      }
+    }
+  }
+
+  if (expression === undefined) {
+    expression = exp.slice(0, i).trim();
+  } else if (lastFilterIndex !== 0) {
+    pushFilter();
+  }
+
+  function pushFilter () {
+    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+    lastFilterIndex = i + 1;
+  }
+
+  if (filters) {
+    for (i = 0; i < filters.length; i++) {
+      expression = wrapFilter(expression, filters[i]);
+    }
+  }
+
+  return expression
+}
+
+function wrapFilter (exp, filter) {
+  var i = filter.indexOf('(');
+  if (i < 0) {
+    // _f: resolveFilter
+    return ("_f(\"" + filter + "\")(" + exp + ")")
+  } else {
+    var name = filter.slice(0, i);
+    var args = filter.slice(i + 1);
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+  }
+}
+
+/*  */
+
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
+  console.error(("[Vue compiler]: " + msg));
+}
+/* eslint-enable no-unused-vars */
+
+function pluckModuleFunction (
+  modules,
+  key
+) {
+  return modules
+    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+    : []
+}
+
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+  el.plain = false;
+}
+
+// add a raw attr (use this in preTransforms)
+function addRawAttr (el, name, value, range) {
+  el.attrsMap[name] = value;
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+}
+
+function addDirective (
+  el,
+  name,
+  rawName,
+  value,
+  arg,
+  isDynamicArg,
+  modifiers,
+  range
+) {
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
+  el.plain = false;
+}
+
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
+function addHandler (
+  el,
+  name,
+  value,
+  modifiers,
+  important,
+  warn,
+  range,
+  dynamic
+) {
+  modifiers = modifiers || emptyObject;
+  // warn prevent and passive modifier
+  /* istanbul ignore if */
+  if (
+    warn &&
+    modifiers.prevent && modifiers.passive
+  ) {
+    warn(
+      'passive and prevent can\'t be used together. ' +
+      'Passive handler can\'t prevent default event.',
+      range
+    );
+  }
+
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
+  // check capture modifier
+  if (modifiers.capture) {
+    delete modifiers.capture;
+    name = prependModifierMarker('!', name, dynamic);
+  }
+  if (modifiers.once) {
+    delete modifiers.once;
+    name = prependModifierMarker('~', name, dynamic);
+  }
+  /* istanbul ignore if */
+  if (modifiers.passive) {
+    delete modifiers.passive;
+    name = prependModifierMarker('&', name, dynamic);
+  }
+
+  var events;
+  if (modifiers.native) {
+    delete modifiers.native;
+    events = el.nativeEvents || (el.nativeEvents = {});
+  } else {
+    events = el.events || (el.events = {});
+  }
+
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+  if (modifiers !== emptyObject) {
+    newHandler.modifiers = modifiers;
+  }
+
+  var handlers = events[name];
+  /* istanbul ignore if */
+  if (Array.isArray(handlers)) {
+    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+  } else if (handlers) {
+    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+  } else {
+    events[name] = newHandler;
+  }
+
+  el.plain = false;
+}
+
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
+function getBindingAttr (
+  el,
+  name,
+  getStatic
+) {
+  var dynamicValue =
+    getAndRemoveAttr(el, ':' + name) ||
+    getAndRemoveAttr(el, 'v-bind:' + name);
+  if (dynamicValue != null) {
+    return parseFilters(dynamicValue)
+  } else if (getStatic !== false) {
+    var staticValue = getAndRemoveAttr(el, name);
+    if (staticValue != null) {
+      return JSON.stringify(staticValue)
+    }
+  }
+}
+
+// note: this only removes the attr from the Array (attrsList) so that it
+// doesn't get processed by processAttrs.
+// By default it does NOT remove it from the map (attrsMap) because the map is
+// needed during codegen.
+function getAndRemoveAttr (
+  el,
+  name,
+  removeFromMap
+) {
+  var val;
+  if ((val = el.attrsMap[name]) != null) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      if (list[i].name === name) {
+        list.splice(i, 1);
+        break
+      }
+    }
+  }
+  if (removeFromMap) {
+    delete el.attrsMap[name];
+  }
+  return val
+}
+
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
+/*  */
+
+/**
+ * Cross-platform code generation for component v-model
+ */
+function genComponentModel (
+  el,
+  value,
+  modifiers
+) {
+  var ref = modifiers || {};
+  var number = ref.number;
+  var trim = ref.trim;
+
+  var baseValueExpression = '$$v';
+  var valueExpression = baseValueExpression;
+  if (trim) {
+    valueExpression =
+      "(typeof " + baseValueExpression + " === 'string'" +
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+  var assignment = genAssignmentCode(value, valueExpression);
+
+  el.model = {
+    value: ("(" + value + ")"),
+    expression: JSON.stringify(value),
+    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+  };
+}
+
+/**
+ * Cross-platform codegen helper for generating v-model value assignment code.
+ */
+function genAssignmentCode (
+  value,
+  assignment
+) {
+  var res = parseModel(value);
+  if (res.key === null) {
+    return (value + "=" + assignment)
+  } else {
+    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+  }
+}
+
+/**
+ * Parse a v-model expression into a base path and a final key segment.
+ * Handles both dot-path and possible square brackets.
+ *
+ * Possible cases:
+ *
+ * - test
+ * - test[key]
+ * - test[test1[key]]
+ * - test["a"][key]
+ * - xxx.test[a[a].test1[key]]
+ * - test.xxx.a["asa"][test1[key]]
+ *
+ */
+
+var len, str, chr, index$1, expressionPos, expressionEndPos;
+
+
+
+function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
+  len = val.length;
+
+  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+    index$1 = val.lastIndexOf('.');
+    if (index$1 > -1) {
+      return {
+        exp: val.slice(0, index$1),
+        key: '"' + val.slice(index$1 + 1) + '"'
+      }
+    } else {
+      return {
+        exp: val,
+        key: null
+      }
+    }
+  }
+
+  str = val;
+  index$1 = expressionPos = expressionEndPos = 0;
+
+  while (!eof()) {
+    chr = next();
+    /* istanbul ignore if */
+    if (isStringStart(chr)) {
+      parseString(chr);
+    } else if (chr === 0x5B) {
+      parseBracket(chr);
+    }
+  }
+
+  return {
+    exp: val.slice(0, expressionPos),
+    key: val.slice(expressionPos + 1, expressionEndPos)
+  }
+}
+
+function next () {
+  return str.charCodeAt(++index$1)
+}
+
+function eof () {
+  return index$1 >= len
+}
+
+function isStringStart (chr) {
+  return chr === 0x22 || chr === 0x27
+}
+
+function parseBracket (chr) {
+  var inBracket = 1;
+  expressionPos = index$1;
+  while (!eof()) {
+    chr = next();
+    if (isStringStart(chr)) {
+      parseString(chr);
+      continue
+    }
+    if (chr === 0x5B) { inBracket++; }
+    if (chr === 0x5D) { inBracket--; }
+    if (inBracket === 0) {
+      expressionEndPos = index$1;
+      break
+    }
+  }
+}
+
+function parseString (chr) {
+  var stringQuote = chr;
+  while (!eof()) {
+    chr = next();
+    if (chr === stringQuote) {
+      break
+    }
+  }
+}
+
+/*  */
+
+var warn$1;
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+function model (
+  el,
+  dir,
+  _warn
+) {
+  warn$1 = _warn;
+  var value = dir.value;
+  var modifiers = dir.modifiers;
+  var tag = el.tag;
+  var type = el.attrsMap.type;
+
+  {
+    // inputs with type="file" are read only and setting the input's
+    // value will throw an error.
+    if (tag === 'input' && type === 'file') {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+  }
+
+  if (el.component) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else if (tag === 'select') {
+    genSelect(el, value, modifiers);
+  } else if (tag === 'input' && type === 'checkbox') {
+    genCheckboxModel(el, value, modifiers);
+  } else if (tag === 'input' && type === 'radio') {
+    genRadioModel(el, value, modifiers);
+  } else if (tag === 'input' || tag === 'textarea') {
+    genDefaultModel(el, value, modifiers);
+  } else if (!config.isReservedTag(tag)) {
+    genComponentModel(el, value, modifiers);
+    // component v-model doesn't need extra runtime
+    return false
+  } else {
+    warn$1(
+      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+      "v-model is not supported on this element type. " +
+      'If you are working with contenteditable, it\'s recommended to ' +
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
+    );
+  }
+
+  // ensure runtime directive metadata
+  return true
+}
+
+function genCheckboxModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+  addProp(el, 'checked',
+    "Array.isArray(" + value + ")" +
+    "?_i(" + value + "," + valueBinding + ")>-1" + (
+      trueValueBinding === 'true'
+        ? (":(" + value + ")")
+        : (":_q(" + value + "," + trueValueBinding + ")")
+    )
+  );
+  addHandler(el, 'change',
+    "var $$a=" + value + "," +
+        '$$el=$event.target,' +
+        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+    'if(Array.isArray($$a)){' +
+      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+          '$$i=_i($$a,$$v);' +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+    null, true
+  );
+}
+
+function genRadioModel (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var valueBinding = getBindingAttr(el, 'value') || 'null';
+  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+}
+
+function genSelect (
+  el,
+  value,
+  modifiers
+) {
+  var number = modifiers && modifiers.number;
+  var selectedVal = "Array.prototype.filter" +
+    ".call($event.target.options,function(o){return o.selected})" +
+    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+    "return " + (number ? '_n(val)' : 'val') + "})";
+
+  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+  var code = "var $$selectedVal = " + selectedVal + ";";
+  code = code + " " + (genAssignmentCode(value, assignment));
+  addHandler(el, 'change', code, null, true);
+}
+
+function genDefaultModel (
+  el,
+  value,
+  modifiers
+) {
+  var type = el.attrsMap.type;
+
+  // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
+  {
+    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
+      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+      warn$1(
+        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
+      );
+    }
+  }
+
+  var ref = modifiers || {};
+  var lazy = ref.lazy;
+  var number = ref.number;
+  var trim = ref.trim;
+  var needCompositionGuard = !lazy && type !== 'range';
+  var event = lazy
+    ? 'change'
+    : type === 'range'
+      ? RANGE_TOKEN
+      : 'input';
+
+  var valueExpression = '$event.target.value';
+  if (trim) {
+    valueExpression = "$event.target.value.trim()";
+  }
+  if (number) {
+    valueExpression = "_n(" + valueExpression + ")";
+  }
+
+  var code = genAssignmentCode(value, valueExpression);
+  if (needCompositionGuard) {
+    code = "if($event.target.composing)return;" + code;
+  }
+
+  addProp(el, 'value', ("(" + value + ")"));
+  addHandler(el, event, code, null, true);
+  if (trim || number) {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
+}
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+var buildRegex = cached(function (delimiters) {
+  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+});
+
+
+
+function parseText (
+  text,
+  delimiters
+) {
+  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+  if (!tagRE.test(text)) {
+    return
+  }
+  var tokens = [];
+  var rawTokens = [];
+  var lastIndex = tagRE.lastIndex = 0;
+  var match, index, tokenValue;
+  while ((match = tagRE.exec(text))) {
+    index = match.index;
+    // push text token
+    if (index > lastIndex) {
+      rawTokens.push(tokenValue = text.slice(lastIndex, index));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    // tag token
+    var exp = parseFilters(match[1].trim());
+    tokens.push(("_s(" + exp + ")"));
+    rawTokens.push({ '@binding': exp });
+    lastIndex = index + match[0].length;
+  }
+  if (lastIndex < text.length) {
+    rawTokens.push(tokenValue = text.slice(lastIndex));
+    tokens.push(JSON.stringify(tokenValue));
+  }
+  return {
+    expression: tokens.join('+'),
+    tokens: rawTokens
+  }
+}
+
+/*  */
+
+function transformNode (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticClass = getAndRemoveAttr(el, 'class');
+  if (staticClass) {
+    var res = parseText(staticClass, options.delimiters);
+    if (res) {
+      warn(
+        "class=\"" + staticClass + "\": " +
+        'Interpolation inside attributes has been removed. ' +
+        'Use v-bind or the colon shorthand instead. For example, ' +
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
+      );
+    }
+  }
+  if (staticClass) {
+    el.staticClass = JSON.stringify(staticClass);
+  }
+  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+  if (classBinding) {
+    el.classBinding = classBinding;
+  }
+}
+
+function genData (el) {
+  var data = '';
+  if (el.staticClass) {
+    data += "staticClass:" + (el.staticClass) + ",";
+  }
+  if (el.classBinding) {
+    data += "class:" + (el.classBinding) + ",";
+  }
+  return data
+}
+
+var klass$1 = {
+  staticKeys: ['staticClass'],
+  transformNode: transformNode,
+  genData: genData
+};
+
+/*  */
+
+function transformNode$1 (el, options) {
+  var warn = options.warn || baseWarn;
+  var staticStyle = getAndRemoveAttr(el, 'style');
+  if (staticStyle) {
+    /* istanbul ignore if */
+    {
+      var res = parseText(staticStyle, options.delimiters);
+      if (res) {
+        warn(
+          "style=\"" + staticStyle + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
+        );
+      }
+    }
+    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+  }
+
+  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+  if (styleBinding) {
+    el.styleBinding = styleBinding;
+  }
+}
+
+function genData$1 (el) {
+  var data = '';
+  if (el.staticStyle) {
+    data += "staticStyle:" + (el.staticStyle) + ",";
+  }
+  if (el.styleBinding) {
+    data += "style:(" + (el.styleBinding) + "),";
+  }
+  return data
+}
+
+var style$1 = {
+  staticKeys: ['staticStyle'],
+  transformNode: transformNode$1,
+  genData: genData$1
+};
+
+/*  */
+
+var decoder;
+
+var he = {
+  decode: function decode (html) {
+    decoder = decoder || document.createElement('div');
+    decoder.innerHTML = html;
+    return decoder.textContent
+  }
+};
+
+/*  */
+
+var isUnaryTag = makeMap(
+  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+  'link,meta,param,source,track,wbr'
+);
+
+// Elements that you can, intentionally, leave open
+// (and which close themselves)
+var canBeLeftOpenTag = makeMap(
+  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+);
+
+// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+var isNonPhrasingTag = makeMap(
+  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+  'title,tr,track'
+);
+
+/**
+ * Not type-checking this file because it's mostly vendor code.
+ */
+
+// Regular Expressions for parsing tags and attributes
+var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+var startTagOpen = new RegExp(("^<" + qnameCapture));
+var startTagClose = /^\s*(\/?)>/;
+var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+var doctype = /^<!DOCTYPE [^>]+>/i;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
+var conditionalComment = /^<!\[/;
+
+// Special Elements (can contain anything)
+var isPlainTextElement = makeMap('script,style,textarea', true);
+var reCache = {};
+
+var decodingMap = {
+  '&lt;': '<',
+  '&gt;': '>',
+  '&quot;': '"',
+  '&amp;': '&',
+  '&#10;': '\n',
+  '&#9;': '\t',
+  '&#39;': "'"
+};
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+// #5992
+var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+function decodeAttr (value, shouldDecodeNewlines) {
+  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+  return value.replace(re, function (match) { return decodingMap[match]; })
+}
+
+function parseHTML (html, options) {
+  var stack = [];
+  var expectHTML = options.expectHTML;
+  var isUnaryTag$$1 = options.isUnaryTag || no;
+  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+  var index = 0;
+  var last, lastTag;
+  while (html) {
+    last = html;
+    // Make sure we're not in a plaintext content element like script/style
+    if (!lastTag || !isPlainTextElement(lastTag)) {
+      var textEnd = html.indexOf('<');
+      if (textEnd === 0) {
+        // Comment:
+        if (comment.test(html)) {
+          var commentEnd = html.indexOf('-->');
+
+          if (commentEnd >= 0) {
+            if (options.shouldKeepComment) {
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+            }
+            advance(commentEnd + 3);
+            continue
+          }
+        }
+
+        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+        if (conditionalComment.test(html)) {
+          var conditionalEnd = html.indexOf(']>');
+
+          if (conditionalEnd >= 0) {
+            advance(conditionalEnd + 2);
+            continue
+          }
+        }
+
+        // Doctype:
+        var doctypeMatch = html.match(doctype);
+        if (doctypeMatch) {
+          advance(doctypeMatch[0].length);
+          continue
+        }
+
+        // End tag:
+        var endTagMatch = html.match(endTag);
+        if (endTagMatch) {
+          var curIndex = index;
+          advance(endTagMatch[0].length);
+          parseEndTag(endTagMatch[1], curIndex, index);
+          continue
+        }
+
+        // Start tag:
+        var startTagMatch = parseStartTag();
+        if (startTagMatch) {
+          handleStartTag(startTagMatch);
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+            advance(1);
+          }
+          continue
+        }
+      }
+
+      var text = (void 0), rest = (void 0), next = (void 0);
+      if (textEnd >= 0) {
+        rest = html.slice(textEnd);
+        while (
+          !endTag.test(rest) &&
+          !startTagOpen.test(rest) &&
+          !comment.test(rest) &&
+          !conditionalComment.test(rest)
+        ) {
+          // < in plain text, be forgiving and treat it as text
+          next = rest.indexOf('<', 1);
+          if (next < 0) { break }
+          textEnd += next;
+          rest = html.slice(textEnd);
+        }
+        text = html.substring(0, textEnd);
+      }
+
+      if (textEnd < 0) {
+        text = html;
+      }
+
+      if (text) {
+        advance(text.length);
+      }
+
+      if (options.chars && text) {
+        options.chars(text, index - text.length, index);
+      }
+    } else {
+      var endTagLength = 0;
+      var stackedTag = lastTag.toLowerCase();
+      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+        endTagLength = endTag.length;
+        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+          text = text
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+        }
+        if (shouldIgnoreFirstNewline(stackedTag, text)) {
+          text = text.slice(1);
+        }
+        if (options.chars) {
+          options.chars(text);
+        }
+        return ''
+      });
+      index += html.length - rest$1.length;
+      html = rest$1;
+      parseEndTag(stackedTag, index - endTagLength, index);
+    }
+
+    if (html === last) {
+      options.chars && options.chars(html);
+      if (!stack.length && options.warn) {
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
+      }
+      break
+    }
+  }
+
+  // Clean up any remaining tags
+  parseEndTag();
+
+  function advance (n) {
+    index += n;
+    html = html.substring(n);
+  }
+
+  function parseStartTag () {
+    var start = html.match(startTagOpen);
+    if (start) {
+      var match = {
+        tagName: start[1],
+        attrs: [],
+        start: index
+      };
+      advance(start[0].length);
+      var end, attr;
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
+        advance(attr[0].length);
+        attr.end = index;
+        match.attrs.push(attr);
+      }
+      if (end) {
+        match.unarySlash = end[1];
+        advance(end[0].length);
+        match.end = index;
+        return match
+      }
+    }
+  }
+
+  function handleStartTag (match) {
+    var tagName = match.tagName;
+    var unarySlash = match.unarySlash;
+
+    if (expectHTML) {
+      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+        parseEndTag(lastTag);
+      }
+      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+        parseEndTag(tagName);
+      }
+    }
+
+    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+    var l = match.attrs.length;
+    var attrs = new Array(l);
+    for (var i = 0; i < l; i++) {
+      var args = match.attrs[i];
+      var value = args[3] || args[4] || args[5] || '';
+      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+        ? options.shouldDecodeNewlinesForHref
+        : options.shouldDecodeNewlines;
+      attrs[i] = {
+        name: args[1],
+        value: decodeAttr(value, shouldDecodeNewlines)
+      };
+      if (options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
+    }
+
+    if (!unary) {
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+      lastTag = tagName;
+    }
+
+    if (options.start) {
+      options.start(tagName, attrs, unary, match.start, match.end);
+    }
+  }
+
+  function parseEndTag (tagName, start, end) {
+    var pos, lowerCasedTagName;
+    if (start == null) { start = index; }
+    if (end == null) { end = index; }
+
+    // Find the closest opened tag of the same type
+    if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
+      for (pos = stack.length - 1; pos >= 0; pos--) {
+        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+          break
+        }
+      }
+    } else {
+      // If no tag name is provided, clean shop
+      pos = 0;
+    }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (i > pos || !tagName &&
+          options.warn
+        ) {
+          options.warn(
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
+          );
+        }
+        if (options.end) {
+          options.end(stack[i].tag, start, end);
+        }
+      }
+
+      // Remove the open elements from the stack
+      stack.length = pos;
+      lastTag = pos && stack[pos - 1].tag;
+    } else if (lowerCasedTagName === 'br') {
+      if (options.start) {
+        options.start(tagName, [], true, start, end);
+      }
+    } else if (lowerCasedTagName === 'p') {
+      if (options.start) {
+        options.start(tagName, [], false, start, end);
+      }
+      if (options.end) {
+        options.end(tagName, start, end);
+      }
+    }
+  }
+}
+
+/*  */
+
+var onRE = /^@|^v-on:/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
+
+var argRE = /:(.*)$/;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE$1 = /[ \f\t\r\n]+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
+
+var decodeHTMLCached = cached(he.decode);
+
+var emptySlotScopeToken = "_empty_";
+
+// configurable state
+var warn$2;
+var delimiters;
+var transforms;
+var preTransforms;
+var postTransforms;
+var platformIsPreTag;
+var platformMustUseProp;
+var platformGetTagNamespace;
+var maybeComponent;
+
+function createASTElement (
+  tag,
+  attrs,
+  parent
+) {
+  return {
+    type: 1,
+    tag: tag,
+    attrsList: attrs,
+    attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
+    parent: parent,
+    children: []
+  }
+}
+
+/**
+ * Convert HTML string to AST.
+ */
+function parse (
+  template,
+  options
+) {
+  warn$2 = options.warn || baseWarn;
+
+  platformIsPreTag = options.isPreTag || no;
+  platformMustUseProp = options.mustUseProp || no;
+  platformGetTagNamespace = options.getTagNamespace || no;
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  ); };
+  transforms = pluckModuleFunction(options.modules, 'transformNode');
+  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+  delimiters = options.delimiters;
+
+  var stack = [];
+  var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
+  var root;
+  var currentParent;
+  var inVPre = false;
+  var inPre = false;
+  var warned = false;
+
+  function warnOnce (msg, range) {
+    if (!warned) {
+      warned = true;
+      warn$2(msg, range);
+    }
+  }
+
+  function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
+    // check pre state
+    if (element.pre) {
+      inVPre = false;
+    }
+    if (platformIsPreTag(element.tag)) {
+      inPre = false;
+    }
+    // apply post-transforms
+    for (var i = 0; i < postTransforms.length; i++) {
+      postTransforms[i](element, options);
+    }
+  }
+
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
+  parseHTML(template, {
+    warn: warn$2,
+    expectHTML: options.expectHTML,
+    isUnaryTag: options.isUnaryTag,
+    canBeLeftOpenTag: options.canBeLeftOpenTag,
+    shouldDecodeNewlines: options.shouldDecodeNewlines,
+    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+    shouldKeepComment: options.comments,
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
+      // check namespace.
+      // inherit parent ns if there is one
+      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+      // handle IE svg bug
+      /* istanbul ignore if */
+      if (isIE && ns === 'svg') {
+        attrs = guardIESVGBug(attrs);
+      }
+
+      var element = createASTElement(tag, attrs, currentParent);
+      if (ns) {
+        element.ns = ns;
+      }
+
+      {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$2(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
+      if (isForbiddenTag(element) && !isServerRendering()) {
+        element.forbidden = true;
+        warn$2(
+          'Templates should only be responsible for mapping the state to the ' +
+          'UI. Avoid placing tags with side-effects in your templates, such as ' +
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
+        );
+      }
+
+      // apply pre-transforms
+      for (var i = 0; i < preTransforms.length; i++) {
+        element = preTransforms[i](element, options) || element;
+      }
+
+      if (!inVPre) {
+        processPre(element);
+        if (element.pre) {
+          inVPre = true;
+        }
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = true;
+      }
+      if (inVPre) {
+        processRawAttrs(element);
+      } else if (!element.processed) {
+        // structural directives
+        processFor(element);
+        processIf(element);
+        processOnce(element);
+      }
+
+      if (!root) {
+        root = element;
+        {
+          checkRootConstraints(root);
+        }
+      }
+
+      if (!unary) {
+        currentParent = element;
+        stack.push(element);
+      } else {
+        closeElement(element);
+      }
+    },
+
+    end: function end (tag, start, end$1) {
+      var element = stack[stack.length - 1];
+      // pop stack
+      stack.length -= 1;
+      currentParent = stack[stack.length - 1];
+      if (options.outputSourceRange) {
+        element.end = end$1;
+      }
+      closeElement(element);
+    },
+
+    chars: function chars (text, start, end) {
+      if (!currentParent) {
+        {
+          if (text === template) {
+            warnOnce(
+              'Component template requires a root element, rather than just text.',
+              { start: start }
+            );
+          } else if ((text = text.trim())) {
+            warnOnce(
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
+            );
+          }
+        }
+        return
+      }
+      // IE textarea placeholder bug
+      /* istanbul ignore if */
+      if (isIE &&
+        currentParent.tag === 'textarea' &&
+        currentParent.attrsMap.placeholder === text
+      ) {
+        return
+      }
+      var children = currentParent.children;
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
+      if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE$1, ' ');
+        }
+        var res;
+        var child;
+        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+          child = {
+            type: 2,
+            expression: res.expression,
+            tokens: res.tokens,
+            text: text
+          };
+        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+          child = {
+            type: 3,
+            text: text
+          };
+        }
+        if (child) {
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
+        }
+      }
+    },
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
+    }
+  });
+  return root
+}
+
+function processPre (el) {
+  if (getAndRemoveAttr(el, 'v-pre') != null) {
+    el.pre = true;
+  }
+}
+
+function processRawAttrs (el) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
+      attrs[i] = {
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
+      };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
+    }
+  } else if (!el.pre) {
+    // non root node in pre blocks with no attributes
+    el.plain = true;
+  }
+}
+
+function processElement (
+  element,
+  options
+) {
+  processKey(element);
+
+  // determine whether this is a plain element after
+  // removing structural attributes
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
+
+  processRef(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
+  processComponent(element);
+  for (var i = 0; i < transforms.length; i++) {
+    element = transforms[i](element, options) || element;
+  }
+  processAttrs(element);
+  return element
+}
+
+function processKey (el) {
+  var exp = getBindingAttr(el, 'key');
+  if (exp) {
+    {
+      if (el.tag === 'template') {
+        warn$2(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$2(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
+    }
+    el.key = exp;
+  }
+}
+
+function processRef (el) {
+  var ref = getBindingAttr(el, 'ref');
+  if (ref) {
+    el.ref = ref;
+    el.refInFor = checkInFor(el);
+  }
+}
+
+function processFor (el) {
+  var exp;
+  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+    var res = parseFor(exp);
+    if (res) {
+      extend(el, res);
+    } else {
+      warn$2(
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+}
+
+
+
+function parseFor (exp) {
+  var inMatch = exp.match(forAliasRE);
+  if (!inMatch) { return }
+  var res = {};
+  res.for = inMatch[2].trim();
+  var alias = inMatch[1].trim().replace(stripParensRE, '');
+  var iteratorMatch = alias.match(forIteratorRE);
+  if (iteratorMatch) {
+    res.alias = alias.replace(forIteratorRE, '').trim();
+    res.iterator1 = iteratorMatch[1].trim();
+    if (iteratorMatch[2]) {
+      res.iterator2 = iteratorMatch[2].trim();
+    }
+  } else {
+    res.alias = alias;
+  }
+  return res
+}
+
+function processIf (el) {
+  var exp = getAndRemoveAttr(el, 'v-if');
+  if (exp) {
+    el.if = exp;
+    addIfCondition(el, {
+      exp: exp,
+      block: el
+    });
+  } else {
+    if (getAndRemoveAttr(el, 'v-else') != null) {
+      el.else = true;
+    }
+    var elseif = getAndRemoveAttr(el, 'v-else-if');
+    if (elseif) {
+      el.elseif = elseif;
+    }
+  }
+}
+
+function processIfConditions (el, parent) {
+  var prev = findPrevElement(parent.children);
+  if (prev && prev.if) {
+    addIfCondition(prev, {
+      exp: el.elseif,
+      block: el
+    });
+  } else {
+    warn$2(
+      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+    );
+  }
+}
+
+function findPrevElement (children) {
+  var i = children.length;
+  while (i--) {
+    if (children[i].type === 1) {
+      return children[i]
+    } else {
+      if (children[i].text !== ' ') {
+        warn$2(
+          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+          "will be ignored.",
+          children[i]
+        );
+      }
+      children.pop();
+    }
+  }
+}
+
+function addIfCondition (el, condition) {
+  if (!el.ifConditions) {
+    el.ifConditions = [];
+  }
+  el.ifConditions.push(condition);
+}
+
+function processOnce (el) {
+  var once$$1 = getAndRemoveAttr(el, 'v-once');
+  if (once$$1 != null) {
+    el.once = true;
+  }
+}
+
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (slotScope) {
+      warn$2(
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (el.attrsMap['v-for']) {
+      warn$2(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
+    if (el.tag === 'template') {
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        {
+          if (el.slotTarget || el.slotScope) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$2(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+      }
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        {
+          if (!maybeComponent(el)) {
+            warn$2(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$2(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
+      }
+    }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else {
+      warn$2(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (el.key) {
+      warn$2(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
+      );
+    }
+  }
+}
+
+function processComponent (el) {
+  var binding;
+  if ((binding = getBindingAttr(el, 'is'))) {
+    el.component = binding;
+  }
+  if (getAndRemoveAttr(el, 'inline-template') != null) {
+    el.inlineTemplate = true;
+  }
+}
+
+function processAttrs (el) {
+  var list = el.attrsList;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+  for (i = 0, l = list.length; i < l; i++) {
+    name = rawName = list[i].name;
+    value = list[i].value;
+    if (dirRE.test(name)) {
+      // mark element as dynamic
+      el.hasBindings = true;
+      // modifiers
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
+      if (modifiers) {
+        name = name.replace(modifierRE, '');
+      }
+      if (bindRE.test(name)) { // v-bind
+        name = name.replace(bindRE, '');
+        value = parseFilters(value);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          value.trim().length === 0
+        ) {
+          warn$2(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
+        if (modifiers) {
+          if (modifiers.prop && !isDynamic) {
+            name = camelize(name);
+            if (name === 'innerHtml') { name = 'innerHTML'; }
+          }
+          if (modifiers.camel && !isDynamic) {
+            name = camelize(name);
+          }
+          if (modifiers.sync) {
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i],
+                true // dynamic
+              );
+            }
+          }
+        }
+        if ((modifiers && modifiers.prop) || (
+          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+        )) {
+          addProp(el, name, value, list[i], isDynamic);
+        } else {
+          addAttr(el, name, value, list[i], isDynamic);
+        }
+      } else if (onRE.test(name)) { // v-on
+        name = name.replace(onRE, '');
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
+      } else { // normal directives
+        name = name.replace(dirRE, '');
+        // parse arg
+        var argMatch = name.match(argRE);
+        var arg = argMatch && argMatch[1];
+        isDynamic = false;
+        if (arg) {
+          name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
+        }
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+        if (name === 'model') {
+          checkForAliasModel(el, value);
+        }
+      }
+    } else {
+      // literal attribute
+      {
+        var res = parseText(value, delimiters);
+        if (res) {
+          warn$2(
+            name + "=\"" + value + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
+          );
+        }
+      }
+      addAttr(el, name, JSON.stringify(value), list[i]);
+      // #6887 firefox doesn't update muted state if set via attribute
+      // even immediately after element creation
+      if (!el.component &&
+          name === 'muted' &&
+          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+        addProp(el, name, 'true', list[i]);
+      }
+    }
+  }
+}
+
+function checkInFor (el) {
+  var parent = el;
+  while (parent) {
+    if (parent.for !== undefined) {
+      return true
+    }
+    parent = parent.parent;
+  }
+  return false
+}
+
+function parseModifiers (name) {
+  var match = name.match(modifierRE);
+  if (match) {
+    var ret = {};
+    match.forEach(function (m) { ret[m.slice(1)] = true; });
+    return ret
+  }
+}
+
+function makeAttrsMap (attrs) {
+  var map = {};
+  for (var i = 0, l = attrs.length; i < l; i++) {
+    if (
+      map[attrs[i].name] && !isIE && !isEdge
+    ) {
+      warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
+    }
+    map[attrs[i].name] = attrs[i].value;
+  }
+  return map
+}
+
+// for script (e.g. type="x/template") or style, do not decode content
+function isTextTag (el) {
+  return el.tag === 'script' || el.tag === 'style'
+}
+
+function isForbiddenTag (el) {
+  return (
+    el.tag === 'style' ||
+    (el.tag === 'script' && (
+      !el.attrsMap.type ||
+      el.attrsMap.type === 'text/javascript'
+    ))
+  )
+}
+
+var ieNSBug = /^xmlns:NS\d+/;
+var ieNSPrefix = /^NS\d+:/;
+
+/* istanbul ignore next */
+function guardIESVGBug (attrs) {
+  var res = [];
+  for (var i = 0; i < attrs.length; i++) {
+    var attr = attrs[i];
+    if (!ieNSBug.test(attr.name)) {
+      attr.name = attr.name.replace(ieNSPrefix, '');
+      res.push(attr);
+    }
+  }
+  return res
+}
+
+function checkForAliasModel (el, value) {
+  var _el = el;
+  while (_el) {
+    if (_el.for && _el.alias === value) {
+      warn$2(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "You are binding v-model directly to a v-for iteration alias. " +
+        "This will not be able to modify the v-for source array because " +
+        "writing to the alias is like modifying a function local variable. " +
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
+      );
+    }
+    _el = _el.parent;
+  }
+}
+
+/*  */
+
+function preTransformNode (el, options) {
+  if (el.tag === 'input') {
+    var map = el.attrsMap;
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
+      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+      // 1. checkbox
+      var branch0 = cloneASTElement(el);
+      // process for on the main node
+      processFor(branch0);
+      addRawAttr(branch0, 'type', 'checkbox');
+      processElement(branch0, options);
+      branch0.processed = true; // prevent it from double-processed
+      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+      addIfCondition(branch0, {
+        exp: branch0.if,
+        block: branch0
+      });
+      // 2. add radio else-if condition
+      var branch1 = cloneASTElement(el);
+      getAndRemoveAttr(branch1, 'v-for', true);
+      addRawAttr(branch1, 'type', 'radio');
+      processElement(branch1, options);
+      addIfCondition(branch0, {
+        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+        block: branch1
+      });
+      // 3. other
+      var branch2 = cloneASTElement(el);
+      getAndRemoveAttr(branch2, 'v-for', true);
+      addRawAttr(branch2, ':type', typeBinding);
+      processElement(branch2, options);
+      addIfCondition(branch0, {
+        exp: ifCondition,
+        block: branch2
+      });
+
+      if (hasElse) {
+        branch0.else = true;
+      } else if (elseIfCondition) {
+        branch0.elseif = elseIfCondition;
+      }
+
+      return branch0
+    }
+  }
+}
+
+function cloneASTElement (el) {
+  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+}
+
+var model$1 = {
+  preTransformNode: preTransformNode
+};
+
+var modules$1 = [
+  klass$1,
+  style$1,
+  model$1
+];
+
+/*  */
+
+function text (el, dir) {
+  if (dir.value) {
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+/*  */
+
+function html (el, dir) {
+  if (dir.value) {
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+  }
+}
+
+var directives$1 = {
+  model: model,
+  text: text,
+  html: html
+};
+
+/*  */
+
+var baseOptions = {
+  expectHTML: true,
+  modules: modules$1,
+  directives: directives$1,
+  isPreTag: isPreTag,
+  isUnaryTag: isUnaryTag,
+  mustUseProp: mustUseProp,
+  canBeLeftOpenTag: canBeLeftOpenTag,
+  isReservedTag: isReservedTag,
+  getTagNamespace: getTagNamespace,
+  staticKeys: genStaticKeys(modules$1)
+};
+
+/*  */
+
+var isStaticKey;
+var isPlatformReservedTag;
+
+var genStaticKeysCached = cached(genStaticKeys$1);
+
+/**
+ * Goal of the optimizer: walk the generated template AST tree
+ * and detect sub-trees that are purely static, i.e. parts of
+ * the DOM that never needs to change.
+ *
+ * Once we detect these sub-trees, we can:
+ *
+ * 1. Hoist them into constants, so that we no longer need to
+ *    create fresh nodes for them on each re-render;
+ * 2. Completely skip them in the patching process.
+ */
+function optimize (root, options) {
+  if (!root) { return }
+  isStaticKey = genStaticKeysCached(options.staticKeys || '');
+  isPlatformReservedTag = options.isReservedTag || no;
+  // first pass: mark all non-static nodes.
+  markStatic$1(root);
+  // second pass: mark static roots.
+  markStaticRoots(root, false);
+}
+
+function genStaticKeys$1 (keys) {
+  return makeMap(
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+    (keys ? ',' + keys : '')
+  )
+}
+
+function markStatic$1 (node) {
+  node.static = isStatic(node);
+  if (node.type === 1) {
+    // do not make component slot content static. this avoids
+    // 1. components not able to mutate slot nodes
+    // 2. static slot content fails for hot-reloading
+    if (
+      !isPlatformReservedTag(node.tag) &&
+      node.tag !== 'slot' &&
+      node.attrsMap['inline-template'] == null
+    ) {
+      return
+    }
+    for (var i = 0, l = node.children.length; i < l; i++) {
+      var child = node.children[i];
+      markStatic$1(child);
+      if (!child.static) {
+        node.static = false;
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        var block = node.ifConditions[i$1].block;
+        markStatic$1(block);
+        if (!block.static) {
+          node.static = false;
+        }
+      }
+    }
+  }
+}
+
+function markStaticRoots (node, isInFor) {
+  if (node.type === 1) {
+    if (node.static || node.once) {
+      node.staticInFor = isInFor;
+    }
+    // For a node to qualify as a static root, it should have children that
+    // are not just static text. Otherwise the cost of hoisting out will
+    // outweigh the benefits and it's better off to just always render it fresh.
+    if (node.static && node.children.length && !(
+      node.children.length === 1 &&
+      node.children[0].type === 3
+    )) {
+      node.staticRoot = true;
+      return
+    } else {
+      node.staticRoot = false;
+    }
+    if (node.children) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        markStaticRoots(node.children[i], isInFor || !!node.for);
+      }
+    }
+    if (node.ifConditions) {
+      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+        markStaticRoots(node.ifConditions[i$1].block, isInFor);
+      }
+    }
+  }
+}
+
+function isStatic (node) {
+  if (node.type === 2) { // expression
+    return false
+  }
+  if (node.type === 3) { // text
+    return true
+  }
+  return !!(node.pre || (
+    !node.hasBindings && // no dynamic bindings
+    !node.if && !node.for && // not v-if or v-for or v-else
+    !isBuiltInTag(node.tag) && // not a built-in
+    isPlatformReservedTag(node.tag) && // not a component
+    !isDirectChildOfTemplateFor(node) &&
+    Object.keys(node).every(isStaticKey)
+  ))
+}
+
+function isDirectChildOfTemplateFor (node) {
+  while (node.parent) {
+    node = node.parent;
+    if (node.tag !== 'template') {
+      return false
+    }
+    if (node.for) {
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+// KeyboardEvent.keyCode aliases
+var keyCodes = {
+  esc: 27,
+  tab: 9,
+  enter: 13,
+  space: 32,
+  up: 38,
+  left: 37,
+  right: 39,
+  down: 40,
+  'delete': [8, 46]
+};
+
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
+// #4868: modifiers that prevent the execution of the listener
+// need to explicitly return null so that we can determine whether to remove
+// the listener for .once
+var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+var modifierCode = {
+  stop: '$event.stopPropagation();',
+  prevent: '$event.preventDefault();',
+  self: genGuard("$event.target !== $event.currentTarget"),
+  ctrl: genGuard("!$event.ctrlKey"),
+  shift: genGuard("!$event.shiftKey"),
+  alt: genGuard("!$event.altKey"),
+  meta: genGuard("!$event.metaKey"),
+  left: genGuard("'button' in $event && $event.button !== 0"),
+  middle: genGuard("'button' in $event && $event.button !== 1"),
+  right: genGuard("'button' in $event && $event.button !== 2")
+};
+
+function genHandlers (
+  events,
+  isNative
+) {
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
+  for (var name in events) {
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
+  }
+}
+
+function genHandler (handler) {
+  if (!handler) {
+    return 'function(){}'
+  }
+
+  if (Array.isArray(handler)) {
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+  }
+
+  var isMethodPath = simplePathRE.test(handler.value);
+  var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+  if (!handler.modifiers) {
+    if (isMethodPath || isFunctionExpression) {
+      return handler.value
+    }
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+  } else {
+    var code = '';
+    var genModifierCode = '';
+    var keys = [];
+    for (var key in handler.modifiers) {
+      if (modifierCode[key]) {
+        genModifierCode += modifierCode[key];
+        // left/right
+        if (keyCodes[key]) {
+          keys.push(key);
+        }
+      } else if (key === 'exact') {
+        var modifiers = (handler.modifiers);
+        genModifierCode += genGuard(
+          ['ctrl', 'shift', 'alt', 'meta']
+            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+            .join('||')
+        );
+      } else {
+        keys.push(key);
+      }
+    }
+    if (keys.length) {
+      code += genKeyFilter(keys);
+    }
+    // Make sure modifiers like prevent and stop get executed after key filtering
+    if (genModifierCode) {
+      code += genModifierCode;
+    }
+    var handlerCode = isMethodPath
+      ? ("return " + (handler.value) + ".apply(null, arguments)")
+      : isFunctionExpression
+        ? ("return (" + (handler.value) + ").apply(null, arguments)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
+    return ("function($event){" + code + handlerCode + "}")
+  }
+}
+
+function genKeyFilter (keys) {
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
+}
+
+function genFilterCode (key) {
+  var keyVal = parseInt(key, 10);
+  if (keyVal) {
+    return ("$event.keyCode!==" + keyVal)
+  }
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
+  return (
+    "_k($event.keyCode," +
+    (JSON.stringify(key)) + "," +
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
+  )
+}
+
+/*  */
+
+function on (el, dir) {
+  if (dir.modifiers) {
+    warn("v-on without argument does not support modifiers.");
+  }
+  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+}
+
+/*  */
+
+function bind$1 (el, dir) {
+  el.wrapData = function (code) {
+    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+  };
+}
+
+/*  */
+
+var baseDirectives = {
+  on: on,
+  bind: bind$1,
+  cloak: noop
+};
+
+/*  */
+
+
+
+
+
+var CodegenState = function CodegenState (options) {
+  this.options = options;
+  this.warn = options.warn || baseWarn;
+  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+  this.directives = extend(extend({}, baseDirectives), options.directives);
+  var isReservedTag = options.isReservedTag || no;
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+  this.onceId = 0;
+  this.staticRenderFns = [];
+  this.pre = false;
+};
+
+
+
+function generate (
+  ast,
+  options
+) {
+  var state = new CodegenState(options);
+  // fix #11483, Root level <script> tags should not be rendered.
+  var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
+  return {
+    render: ("with(this){return " + code + "}"),
+    staticRenderFns: state.staticRenderFns
+  }
+}
+
+function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
+  if (el.staticRoot && !el.staticProcessed) {
+    return genStatic(el, state)
+  } else if (el.once && !el.onceProcessed) {
+    return genOnce(el, state)
+  } else if (el.for && !el.forProcessed) {
+    return genFor(el, state)
+  } else if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+    return genChildren(el, state) || 'void 0'
+  } else if (el.tag === 'slot') {
+    return genSlot(el, state)
+  } else {
+    // component or element
+    var code;
+    if (el.component) {
+      code = genComponent(el.component, el, state);
+    } else {
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
+
+      var children = el.inlineTemplate ? null : genChildren(el, state, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+    }
+    // module transforms
+    for (var i = 0; i < state.transforms.length; i++) {
+      code = state.transforms[i](el, code);
+    }
+    return code
+  }
+}
+
+// hoist static sub-trees out
+function genStatic (el, state) {
+  el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
+  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
+  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+}
+
+// v-once
+function genOnce (el, state) {
+  el.onceProcessed = true;
+  if (el.if && !el.ifProcessed) {
+    return genIf(el, state)
+  } else if (el.staticInFor) {
+    var key = '';
+    var parent = el.parent;
+    while (parent) {
+      if (parent.for) {
+        key = parent.key;
+        break
+      }
+      parent = parent.parent;
+    }
+    if (!key) {
+      state.warn(
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
+      );
+      return genElement(el, state)
+    }
+    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+  } else {
+    return genStatic(el, state)
+  }
+}
+
+function genIf (
+  el,
+  state,
+  altGen,
+  altEmpty
+) {
+  el.ifProcessed = true; // avoid recursion
+  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+}
+
+function genIfConditions (
+  conditions,
+  state,
+  altGen,
+  altEmpty
+) {
+  if (!conditions.length) {
+    return altEmpty || '_e()'
+  }
+
+  var condition = conditions.shift();
+  if (condition.exp) {
+    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+  } else {
+    return ("" + (genTernaryExp(condition.block)))
+  }
+
+  // v-if with v-once should generate code like (a)?_m(0):_m(1)
+  function genTernaryExp (el) {
+    return altGen
+      ? altGen(el, state)
+      : el.once
+        ? genOnce(el, state)
+        : genElement(el, state)
+  }
+}
+
+function genFor (
+  el,
+  state,
+  altGen,
+  altHelper
+) {
+  var exp = el.for;
+  var alias = el.alias;
+  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+  if (state.maybeComponent(el) &&
+    el.tag !== 'slot' &&
+    el.tag !== 'template' &&
+    !el.key
+  ) {
+    state.warn(
+      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+      "v-for should have explicit keys. " +
+      "See https://vuejs.org/guide/list.html#key for more info.",
+      el.rawAttrsMap['v-for'],
+      true /* tip */
+    );
+  }
+
+  el.forProcessed = true; // avoid recursion
+  return (altHelper || '_l') + "((" + exp + ")," +
+    "function(" + alias + iterator1 + iterator2 + "){" +
+      "return " + ((altGen || genElement)(el, state)) +
+    '})'
+}
+
+function genData$2 (el, state) {
+  var data = '{';
+
+  // directives first.
+  // directives may mutate the el's other properties before they are generated.
+  var dirs = genDirectives(el, state);
+  if (dirs) { data += dirs + ','; }
+
+  // key
+  if (el.key) {
+    data += "key:" + (el.key) + ",";
+  }
+  // ref
+  if (el.ref) {
+    data += "ref:" + (el.ref) + ",";
+  }
+  if (el.refInFor) {
+    data += "refInFor:true,";
+  }
+  // pre
+  if (el.pre) {
+    data += "pre:true,";
+  }
+  // record original tag name for components using "is" attribute
+  if (el.component) {
+    data += "tag:\"" + (el.tag) + "\",";
+  }
+  // module data generation functions
+  for (var i = 0; i < state.dataGenFns.length; i++) {
+    data += state.dataGenFns[i](el);
+  }
+  // attributes
+  if (el.attrs) {
+    data += "attrs:" + (genProps(el.attrs)) + ",";
+  }
+  // DOM props
+  if (el.props) {
+    data += "domProps:" + (genProps(el.props)) + ",";
+  }
+  // event handlers
+  if (el.events) {
+    data += (genHandlers(el.events, false)) + ",";
+  }
+  if (el.nativeEvents) {
+    data += (genHandlers(el.nativeEvents, true)) + ",";
+  }
+  // slot target
+  // only for non-scoped slots
+  if (el.slotTarget && !el.slotScope) {
+    data += "slot:" + (el.slotTarget) + ",";
+  }
+  // scoped slots
+  if (el.scopedSlots) {
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+  }
+  // component v-model
+  if (el.model) {
+    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+  }
+  // inline-template
+  if (el.inlineTemplate) {
+    var inlineTemplate = genInlineTemplate(el, state);
+    if (inlineTemplate) {
+      data += inlineTemplate + ",";
+    }
+  }
+  data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
+  // v-bind data wrap
+  if (el.wrapData) {
+    data = el.wrapData(data);
+  }
+  // v-on data wrap
+  if (el.wrapListeners) {
+    data = el.wrapListeners(data);
+  }
+  return data
+}
+
+function genDirectives (el, state) {
+  var dirs = el.directives;
+  if (!dirs) { return }
+  var res = 'directives:[';
+  var hasRuntime = false;
+  var i, l, dir, needRuntime;
+  for (i = 0, l = dirs.length; i < l; i++) {
+    dir = dirs[i];
+    needRuntime = true;
+    var gen = state.directives[dir.name];
+    if (gen) {
+      // compile-time directive that manipulates AST.
+      // returns true if it also needs a runtime counterpart.
+      needRuntime = !!gen(el, dir, state.warn);
+    }
+    if (needRuntime) {
+      hasRuntime = true;
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+    }
+  }
+  if (hasRuntime) {
+    return res.slice(0, -1) + ']'
+  }
+}
+
+function genInlineTemplate (el, state) {
+  var ast = el.children[0];
+  if (el.children.length !== 1 || ast.type !== 1) {
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
+  }
+  if (ast && ast.type === 1) {
+    var inlineRenderFns = generate(ast, state.options);
+    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+  }
+}
+
+function genScopedSlots (
+  el,
+  slots,
+  state
+) {
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
+}
+
+function genScopedSlot (
+  el,
+  state
+) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
+  if (el.for && !el.forProcessed) {
+    return genFor(el, state, genScopedSlot)
+  }
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
+    "return " + (el.tag === 'template'
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+        : genChildren(el, state) || 'undefined'
+      : genElement(el, state)) + "}";
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+}
+
+function genChildren (
+  el,
+  state,
+  checkSkip,
+  altGenElement,
+  altGenNode
+) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+      el$1.for &&
+      el$1.tag !== 'template' &&
+      el$1.tag !== 'slot'
+    ) {
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+    }
+    var normalizationType$1 = checkSkip
+      ? getNormalizationType(children, state.maybeComponent)
+      : 0;
+    var gen = altGenNode || genNode;
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+  }
+}
+
+// determine the normalization needed for the children array.
+// 0: no normalization needed
+// 1: simple normalization needed (possible 1-level deep nested array)
+// 2: full normalization needed
+function getNormalizationType (
+  children,
+  maybeComponent
+) {
+  var res = 0;
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.type !== 1) {
+      continue
+    }
+    if (needsNormalization(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+      res = 2;
+      break
+    }
+    if (maybeComponent(el) ||
+        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+      res = 1;
+    }
+  }
+  return res
+}
+
+function needsNormalization (el) {
+  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+}
+
+function genNode (node, state) {
+  if (node.type === 1) {
+    return genElement(node, state)
+  } else if (node.type === 3 && node.isComment) {
+    return genComment(node)
+  } else {
+    return genText(node)
+  }
+}
+
+function genText (text) {
+  return ("_v(" + (text.type === 2
+    ? text.expression // no need for () because already wrapped in _s()
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+}
+
+function genComment (comment) {
+  return ("_e(" + (JSON.stringify(comment.text)) + ")")
+}
+
+function genSlot (el, state) {
+  var slotName = el.slotName || '"default"';
+  var children = genChildren(el, state);
+  var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
+  var bind$$1 = el.attrsMap['v-bind'];
+  if ((attrs || bind$$1) && !children) {
+    res += ",null";
+  }
+  if (attrs) {
+    res += "," + attrs;
+  }
+  if (bind$$1) {
+    res += (attrs ? '' : ',null') + "," + bind$$1;
+  }
+  return res + ')'
+}
+
+// componentName is el.component, take it as argument to shun flow's pessimistic refinement
+function genComponent (
+  componentName,
+  el,
+  state
+) {
+  var children = el.inlineTemplate ? null : genChildren(el, state, true);
+  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+}
+
+function genProps (props) {
+  var staticProps = "";
+  var dynamicProps = "";
+  for (var i = 0; i < props.length; i++) {
+    var prop = props[i];
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
+    }
+  }
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
+}
+
+// #3895, #4268
+function transformSpecialNewlines (text) {
+  return text
+    .replace(/\u2028/g, '\\u2028')
+    .replace(/\u2029/g, '\\u2029')
+}
+
+/*  */
+
+
+
+// these keywords should not appear inside expressions, but operators like
+// typeof, instanceof and in are allowed
+var prohibitedKeywordRE = new RegExp('\\b' + (
+  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+  'super,throw,while,yield,delete,export,import,return,switch,default,' +
+  'extends,finally,continue,debugger,function,arguments'
+).split(',').join('\\b|\\b') + '\\b');
+
+// these unary operators should not be used as property/method names
+var unaryOperatorsRE = new RegExp('\\b' + (
+  'delete,typeof,void'
+).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+// strip strings in expressions
+var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+// detect problematic expressions in a template
+function detectErrors (ast, warn) {
+  if (ast) {
+    checkNode(ast, warn);
+  }
+}
+
+function checkNode (node, warn) {
+  if (node.type === 1) {
+    for (var name in node.attrsMap) {
+      if (dirRE.test(name)) {
+        var value = node.attrsMap[name];
+        if (value) {
+          var range = node.rawAttrsMap[name];
+          if (name === 'v-for') {
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+          } else if (onRE.test(name)) {
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+          } else {
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+          }
+        }
+      }
+    }
+    if (node.children) {
+      for (var i = 0; i < node.children.length; i++) {
+        checkNode(node.children[i], warn);
+      }
+    }
+  } else if (node.type === 2) {
+    checkExpression(node.expression, node.text, warn, node);
+  }
+}
+
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
+      "avoid using JavaScript unary operator as property name: " +
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
+    );
+  }
+  checkExpression(exp, text, warn, range);
+}
+
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+}
+
+function checkIdentifier (
+  ident,
+  type,
+  text,
+  warn,
+  range
+) {
+  if (typeof ident === 'string') {
+    try {
+      new Function(("var " + ident + "=_"));
+    } catch (e) {
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+    }
+  }
+}
+
+function checkExpression (exp, text, warn, range) {
+  try {
+    new Function(("return " + exp));
+  } catch (e) {
+    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+    if (keywordMatch) {
+      warn(
+        "avoid using JavaScript keyword as property name: " +
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
+      );
+    } else {
+      warn(
+        "invalid expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+}
+
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
+/*  */
+
+
+
+function createFunction (code, errors) {
+  try {
+    return new Function(code)
+  } catch (err) {
+    errors.push({ err: err, code: code });
+    return noop
+  }
+}
+
+function createCompileToFunctionFn (compile) {
+  var cache = Object.create(null);
+
+  return function compileToFunctions (
+    template,
+    options,
+    vm
+  ) {
+    options = extend({}, options);
+    var warn$$1 = options.warn || warn;
+    delete options.warn;
+
+    /* istanbul ignore if */
+    {
+      // detect possible CSP restriction
+      try {
+        new Function('return 1');
+      } catch (e) {
+        if (e.toString().match(/unsafe-eval|CSP/)) {
+          warn$$1(
+            'It seems you are using the standalone build of Vue.js in an ' +
+            'environment with Content Security Policy that prohibits unsafe-eval. ' +
+            'The template compiler cannot work in this environment. Consider ' +
+            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+            'templates into render functions.'
+          );
+        }
+      }
+    }
+
+    // check cache
+    var key = options.delimiters
+      ? String(options.delimiters) + template
+      : template;
+    if (cache[key]) {
+      return cache[key]
+    }
+
+    // compile
+    var compiled = compile(template, options);
+
+    // check compilation errors/tips
+    {
+      if (compiled.errors && compiled.errors.length) {
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
+      }
+      if (compiled.tips && compiled.tips.length) {
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
+      }
+    }
+
+    // turn code into functions
+    var res = {};
+    var fnGenErrors = [];
+    res.render = createFunction(compiled.render, fnGenErrors);
+    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+      return createFunction(code, fnGenErrors)
+    });
+
+    // check function generation errors.
+    // this should only happen if there is a bug in the compiler itself.
+    // mostly for codegen development use
+    /* istanbul ignore if */
+    {
+      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+        warn$$1(
+          "Failed to generate render function:\n\n" +
+          fnGenErrors.map(function (ref) {
+            var err = ref.err;
+            var code = ref.code;
+
+            return ((err.toString()) + " in\n\n" + code + "\n");
+        }).join('\n'),
+          vm
+        );
+      }
+    }
+
+    return (cache[key] = res)
+  }
+}
+
+/*  */
+
+function createCompilerCreator (baseCompile) {
+  return function createCompiler (baseOptions) {
+    function compile (
+      template,
+      options
+    ) {
+      var finalOptions = Object.create(baseOptions);
+      var errors = [];
+      var tips = [];
+
+      var warn = function (msg, range, tip) {
+        (tip ? tips : errors).push(msg);
+      };
+
+      if (options) {
+        if (options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
+        // merge custom modules
+        if (options.modules) {
+          finalOptions.modules =
+            (baseOptions.modules || []).concat(options.modules);
+        }
+        // merge custom directives
+        if (options.directives) {
+          finalOptions.directives = extend(
+            Object.create(baseOptions.directives || null),
+            options.directives
+          );
+        }
+        // copy other options
+        for (var key in options) {
+          if (key !== 'modules' && key !== 'directives') {
+            finalOptions[key] = options[key];
+          }
+        }
+      }
+
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
+      {
+        detectErrors(compiled.ast, warn);
+      }
+      compiled.errors = errors;
+      compiled.tips = tips;
+      return compiled
+    }
+
+    return {
+      compile: compile,
+      compileToFunctions: createCompileToFunctionFn(compile)
+    }
+  }
+}
+
+/*  */
+
+// `createCompilerCreator` allows creating compilers that use alternative
+// parser/optimizer/codegen, e.g the SSR optimizing compiler.
+// Here we just export a default compiler using the default parts.
+var createCompiler = createCompilerCreator(function baseCompile (
+  template,
+  options
+) {
+  var ast = parse(template.trim(), options);
+  if (options.optimize !== false) {
+    optimize(ast, options);
+  }
+  var code = generate(ast, options);
+  return {
+    ast: ast,
+    render: code.render,
+    staticRenderFns: code.staticRenderFns
+  }
+});
+
+/*  */
+
+var ref$1 = createCompiler(baseOptions);
+var compile = ref$1.compile;
+var compileToFunctions = ref$1.compileToFunctions;
+
+/*  */
+
+// check whether current browser encodes a char inside attribute values
+var div;
+function getShouldDecode (href) {
+  div = div || document.createElement('div');
+  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+  return div.innerHTML.indexOf('&#10;') > 0
+}
+
+// #3663: IE encodes newlines inside attribute values while other browsers don't
+var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+// #6828: chrome encodes content in a[href]
+var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+/*  */
+
+var idToTemplate = cached(function (id) {
+  var el = query(id);
+  return el && el.innerHTML
+});
+
+var mount = Vue.prototype.$mount;
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && query(el);
+
+  /* istanbul ignore if */
+  if (el === document.body || el === document.documentElement) {
+    warn(
+      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+    );
+    return this
+  }
+
+  var options = this.$options;
+  // resolve template/el and convert to render function
+  if (!options.render) {
+    var template = options.template;
+    if (template) {
+      if (typeof template === 'string') {
+        if (template.charAt(0) === '#') {
+          template = idToTemplate(template);
+          /* istanbul ignore if */
+          if (!template) {
+            warn(
+              ("Template element not found or is empty: " + (options.template)),
+              this
+            );
+          }
+        }
+      } else if (template.nodeType) {
+        template = template.innerHTML;
+      } else {
+        {
+          warn('invalid template option:' + template, this);
+        }
+        return this
+      }
+    } else if (el) {
+      template = getOuterHTML(el);
+    }
+    if (template) {
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        mark('compile');
+      }
+
+      var ref = compileToFunctions(template, {
+        outputSourceRange: "development" !== 'production',
+        shouldDecodeNewlines: shouldDecodeNewlines,
+        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+        delimiters: options.delimiters,
+        comments: options.comments
+      }, this);
+      var render = ref.render;
+      var staticRenderFns = ref.staticRenderFns;
+      options.render = render;
+      options.staticRenderFns = staticRenderFns;
+
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        mark('compile end');
+        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+      }
+    }
+  }
+  return mount.call(this, el, hydrating)
+};
+
+/**
+ * Get outerHTML of elements, taking care
+ * of SVG elements in IE as well.
+ */
+function getOuterHTML (el) {
+  if (el.outerHTML) {
+    return el.outerHTML
+  } else {
+    var container = document.createElement('div');
+    container.appendChild(el.cloneNode(true));
+    return container.innerHTML
+  }
+}
+
+Vue.compile = compileToFunctions;
+
+module.exports = Vue;
diff --git a/dist/vue.common.js b/dist/vue.common.js
index 662a74d3727..3bbc37c95fc 100644
--- a/dist/vue.common.js
+++ b/dist/vue.common.js
@@ -1,10811 +1,5 @@
-/*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
- * Released under the MIT License.
- */
-'use strict';
-
-/*  */
-
-var emptyObject = Object.freeze({});
-
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-function isUndef (v) {
-  return v === undefined || v === null
-}
-
-function isDef (v) {
-  return v !== undefined && v !== null
-}
-
-function isTrue (v) {
-  return v === true
-}
-
-function isFalse (v) {
-  return v === false
-}
-
-/**
- * Check if value is primitive
- */
-function isPrimitive (value) {
-  return (
-    typeof value === 'string' ||
-    typeof value === 'number' ||
-    // $flow-disable-line
-    typeof value === 'symbol' ||
-    typeof value === 'boolean'
-  )
-}
-
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
-
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
-
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
-
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
-
-function isRegExp (v) {
-  return _toString.call(v) === '[object RegExp]'
-}
-
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
-
-/**
- * Convert a value to a string that is actually rendered.
- */
-function toString (val) {
-  return val == null
-    ? ''
-    : typeof val === 'object'
-      ? JSON.stringify(val, null, 2)
-      : String(val)
-}
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-function toNumber (val) {
-  var n = parseFloat(val);
-  return isNaN(n) ? val : n
-}
-
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
-
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
-
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
-  }
-}
-
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
-
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
-
-/**
- * Capitalize a string.
- */
-var capitalize = cached(function (str) {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
-
-/**
- * Hyphenate a camelCase string.
- */
-var hyphenateRE = /\B([A-Z])/g;
-var hyphenate = cached(function (str) {
-  return str.replace(hyphenateRE, '-$1').toLowerCase()
-});
-
-/**
- * Simple bind, faster than native
- */
-function bind (fn, ctx) {
-  function boundFn (a) {
-    var l = arguments.length;
-    return l
-      ? l > 1
-        ? fn.apply(ctx, arguments)
-        : fn.call(ctx, a)
-      : fn.call(ctx)
-  }
-  // record original fn length
-  boundFn._length = fn.length;
-  return boundFn
-}
-
-/**
- * Convert an Array-like object to a real Array.
- */
-function toArray (list, start) {
-  start = start || 0;
-  var i = list.length - start;
-  var ret = new Array(i);
-  while (i--) {
-    ret[i] = list[i + start];
-  }
-  return ret
-}
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
-  }
-  return to
-}
-
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  var res = {};
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i]) {
-      extend(res, arr[i]);
-    }
-  }
-  return res
-}
-
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
-
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
-
-/**
- * Generate a static keys string from compiler modules.
- */
-function genStaticKeys (modules) {
-  return modules.reduce(function (keys, m) {
-    return keys.concat(m.staticKeys || [])
-  }, []).join(',')
-}
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-function looseEqual (a, b) {
-  if (a === b) { return true }
-  var isObjectA = isObject(a);
-  var isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      var isArrayA = Array.isArray(a);
-      var isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every(function (e, i) {
-          return looseEqual(e, b[i])
-        })
-      } else if (!isArrayA && !isArrayB) {
-        var keysA = Object.keys(a);
-        var keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(function (key) {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
-      }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
-    }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
-  }
-}
-
-function looseIndexOf (arr, val) {
-  for (var i = 0; i < arr.length; i++) {
-    if (looseEqual(arr[i], val)) { return i }
-  }
-  return -1
-}
-
-/**
- * Ensure a function is called only once.
- */
-function once (fn) {
-  var called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-var SSR_ATTR = 'data-server-rendered';
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
-  /**
-   * Option merge strategies (used in core/util/options)
-   */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
-
-  /**
-   * Whether to suppress warnings.
-   */
-  silent: false,
-
-  /**
-   * Show production mode tip message on boot?
-   */
-  productionTip: process.env.NODE_ENV !== 'production',
-
-  /**
-   * Whether to enable devtools
-   */
-  devtools: process.env.NODE_ENV !== 'production',
-
-  /**
-   * Whether to record perf
-   */
-  performance: false,
-
-  /**
-   * Error handler for watcher errors
-   */
-  errorHandler: null,
-
-  /**
-   * Warn handler for watcher warns
-   */
-  warnHandler: null,
-
-  /**
-   * Ignore certain custom elements
-   */
-  ignoredElements: [],
-
-  /**
-   * Custom user key aliases for v-on
-   */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
-
-  /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
-   */
-  isReservedTag: no,
-
-  /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
-   */
-  isReservedAttr: no,
-
-  /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
-   */
-  isUnknownElement: no,
-
-  /**
-   * Get the namespace of an element
-   */
-  getTagNamespace: noop,
-
-  /**
-   * Parse the real tag name for the specific platform.
-   */
-  parsePlatformTagName: identity,
-
-  /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
-   */
-  mustUseProp: no,
-
-  /**
-   * Exposed for legacy reasons
-   */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
-
-/*  */
-
-/**
- * Check if a string starts with $ or _
- */
-function isReserved (str) {
-  var c = (str + '').charCodeAt(0);
-  return c === 0x24 || c === 0x5F
-}
-
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
-/**
- * Parse simple path.
- */
-var bailRE = /[^\w.$]/;
-function parsePath (path) {
-  if (bailRE.test(path)) {
-    return
-  }
-  var segments = path.split('.');
-  return function (obj) {
-    for (var i = 0; i < segments.length; i++) {
-      if (!obj) { return }
-      obj = obj[segments[i]];
-    }
-    return obj
-  }
-}
-
-/*  */
-
-
-// can we use __proto__?
-var hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
-
-var supportsPassive = false;
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        supportsPassive = true;
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
-    }
-  }
-  return _isServer
-};
-
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
-
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
-
-var _Set;
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  _Set = Set;
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./vue.common.prod.js')
 } else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
-    function Set () {
-      this.set = Object.create(null);
-    }
-    Set.prototype.has = function has (key) {
-      return this.set[key] === true
-    };
-    Set.prototype.add = function add (key) {
-      this.set[key] = true;
-    };
-    Set.prototype.clear = function clear () {
-      this.set = Object.create(null);
-    };
-
-    return Set;
-  }());
-}
-
-/*  */
-
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
-
-if (process.env.NODE_ENV !== 'production') {
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
-
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
-
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
-    }
-  };
-
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
-    }
-  };
-
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
-    }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
-    }
-
-    return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
-    )
-  };
-
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
-    }
-    return res
-  };
-
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
-        }
-        tree.push(vm);
-        vm = vm.$parent;
-      }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
-    }
-  };
-}
-
-/*  */
-
-
-var uid = 0;
-
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-var targetStack = [];
-
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
-}
-
-function popTarget () {
-  Dep.target = targetStack.pop();
-}
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-var createEmptyVNode = function (text) {
-  if ( text === void 0 ) text = '';
-
-  var node = new VNode();
-  node.text = text;
-  node.isComment = true;
-  return node
-};
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
-  var cloned = new VNode(
-    vnode.tag,
-    vnode.data,
-    vnode.children,
-    vnode.text,
-    vnode.elm,
-    vnode.context,
-    componentOptions,
-    vnode.asyncFactory
-  );
-  cloned.ns = vnode.ns;
-  cloned.isStatic = vnode.isStatic;
-  cloned.key = vnode.key;
-  cloned.isComment = vnode.isComment;
-  cloned.fnContext = vnode.fnContext;
-  cloned.fnOptions = vnode.fnOptions;
-  cloned.fnScopeId = vnode.fnScopeId;
-  cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
-  return cloned
-}
-
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
-
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
-
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
-    }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
-
-/*  */
-
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
-
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
-
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
-  }
-};
-
-// helpers
-
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
-
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
-          }
-        }
-      }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
-      }
-      /* eslint-enable no-self-compare */
-      if (process.env.NODE_ENV !== 'production' && customSetter) {
-        customSetter();
-      }
-      if (setter) {
-        setter.call(obj, newVal);
-      } else {
-        val = newVal;
-      }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
-    }
-  });
-}
-
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
-  }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
-  }
-  if (!ob) {
-    target[key] = val;
-    return val
-  }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
-
-/**
- * Delete a property and trigger change if necessary.
- */
-function del (target, key) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.splice(key, 1);
-    return
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      'Avoid deleting properties on a Vue instance or its root $data ' +
-      '- just set it to null.'
-    );
-    return
-  }
-  if (!hasOwn(target, key)) {
-    return
-  }
-  delete target[key];
-  if (!ob) {
-    return
-  }
-  ob.dep.notify();
-}
-
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
-    }
-  }
-}
-
-/*  */
-
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
-
-/**
- * Options with restrictions
- */
-if (process.env.NODE_ENV !== 'production') {
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
-      warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
-      );
-    }
-    return defaultStrat(parent, child)
-  };
-}
-
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
-    }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
-      } else {
-        return defaultData
-      }
-    }
-  }
-}
-
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      process.env.NODE_ENV !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
-
-      return parentVal
-    }
-    return mergeDataOrFn(parentVal, childVal)
-  }
-
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
-
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
-  }
-}
-
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
-
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
-  if (process.env.NODE_ENV !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && process.env.NODE_ENV !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (var key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-    warn(
-      'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
-    );
-  }
-  if (isBuiltInTag(name) || config.isReservedTag(name)) {
-    warn(
-      'Do not use built-in or reserved HTML elements as component ' +
-      'id: ' + name
-    );
-  }
-}
-
-/**
- * Ensure all props option syntax are normalized into the
- * Object-based format.
- */
-function normalizeProps (options, vm) {
-  var props = options.props;
-  if (!props) { return }
-  var res = {};
-  var i, val, name;
-  if (Array.isArray(props)) {
-    i = props.length;
-    while (i--) {
-      val = props[i];
-      if (typeof val === 'string') {
-        name = camelize(val);
-        res[name] = { type: null };
-      } else if (process.env.NODE_ENV !== 'production') {
-        warn('props must be strings when using array syntax.');
-      }
-    }
-  } else if (isPlainObject(props)) {
-    for (var key in props) {
-      val = props[key];
-      name = camelize(key);
-      res[name] = isPlainObject(val)
-        ? val
-        : { type: val };
-    }
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn(
-      "Invalid value for option \"props\": expected an Array or an Object, " +
-      "but got " + (toRawType(props)) + ".",
-      vm
-    );
-  }
-  options.props = res;
-}
-
-/**
- * Normalize all injections into Object-based format
- */
-function normalizeInject (options, vm) {
-  var inject = options.inject;
-  if (!inject) { return }
-  var normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (var i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (var key in inject) {
-      var val = inject[key];
-      normalized[key] = isPlainObject(val)
-        ? extend({ from: key }, val)
-        : { from: val };
-    }
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn(
-      "Invalid value for option \"inject\": expected an Array or an Object, " +
-      "but got " + (toRawType(inject)) + ".",
-      vm
-    );
-  }
-}
-
-/**
- * Normalize raw function directives into object format.
- */
-function normalizeDirectives (options) {
-  var dirs = options.directives;
-  if (dirs) {
-    for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
-      }
-    }
-  }
-}
-
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
-  }
-}
-
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-function mergeOptions (
-  parent,
-  child,
-  vm
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    checkComponents(child);
-  }
-
-  if (typeof child === 'function') {
-    child = child.options;
-  }
-
-  normalizeProps(child, vm);
-  normalizeInject(child, vm);
-  normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
-    }
-  }
-  var options = {};
-  var key;
-  for (key in parent) {
-    mergeField(key);
-  }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
-    }
-  }
-  function mergeField (key) {
-    var strat = strats[key] || defaultStrat;
-    options[key] = strat(parent[key], child[key], vm, key);
-  }
-  return options
-}
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-function resolveAsset (
-  options,
-  type,
-  id,
-  warnMissing
-) {
-  /* istanbul ignore if */
-  if (typeof id !== 'string') {
-    return
-  }
-  var assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) { return assets[id] }
-  var camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-  var PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-  // fallback to prototype chain
-  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
-    warn(
-      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-      options
-    );
-  }
-  return res
-}
-
-/*  */
-
-function validateProp (
-  key,
-  propOptions,
-  propsData,
-  vm
-) {
-  var prop = propOptions[key];
-  var absent = !hasOwn(propsData, key);
-  var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
-    if (absent && !hasOwn(prop, 'default')) {
-      value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
-    }
-  }
-  // check default value
-  if (value === undefined) {
-    value = getPropDefaultValue(vm, prop, key);
-    // since the default value is a fresh copy,
-    // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
-    observe(value);
-    observerState.shouldConvert = prevShouldConvert;
-  }
-  if (
-    process.env.NODE_ENV !== 'production' &&
-    // skip validation for weex recycle-list child component props
-    !(false && isObject(value) && ('@binding' in value))
-  ) {
-    assertProp(prop, key, value, vm, absent);
-  }
-  return value
-}
-
-/**
- * Get the default value of a prop.
- */
-function getPropDefaultValue (vm, prop, key) {
-  // no default, return undefined
-  if (!hasOwn(prop, 'default')) {
-    return undefined
-  }
-  var def = prop.default;
-  // warn against non-factory defaults for Object & Array
-  if (process.env.NODE_ENV !== 'production' && isObject(def)) {
-    warn(
-      'Invalid default value for prop "' + key + '": ' +
-      'Props with type Object/Array must use a factory function ' +
-      'to return the default value.',
-      vm
-    );
-  }
-  // the raw prop value was also undefined from previous render,
-  // return previous default value to avoid unnecessary watcher trigger
-  if (vm && vm.$options.propsData &&
-    vm.$options.propsData[key] === undefined &&
-    vm._props[key] !== undefined
-  ) {
-    return vm._props[key]
-  }
-  // call factory function for non-Function types
-  // a value is Function if its prototype is function even across different execution context
-  return typeof def === 'function' && getType(prop.type) !== 'Function'
-    ? def.call(vm)
-    : def
-}
-
-/**
- * Assert whether a prop is valid.
- */
-function assertProp (
-  prop,
-  name,
-  value,
-  vm,
-  absent
-) {
-  if (prop.required && absent) {
-    warn(
-      'Missing required prop: "' + name + '"',
-      vm
-    );
-    return
-  }
-  if (value == null && !prop.required) {
-    return
-  }
-  var type = prop.type;
-  var valid = !type || type === true;
-  var expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
-    }
-    for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
-    }
-  }
-  if (!valid) {
-    warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
-      vm
-    );
-    return
-  }
-  var validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
-    }
-  }
-}
-
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
-
-function assertType (value, type) {
-  var valid;
-  var expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    var t = typeof value;
-    valid = t === expectedType.toLowerCase();
-    // for primitive wrapper objects
-    if (!valid && t === 'object') {
-      valid = value instanceof type;
-    }
-  } else if (expectedType === 'Object') {
-    valid = isPlainObject(value);
-  } else if (expectedType === 'Array') {
-    valid = Array.isArray(value);
-  } else {
-    valid = value instanceof type;
-  }
-  return {
-    valid: valid,
-    expectedType: expectedType
-  }
-}
-
-/**
- * Use function string name to check built-in types,
- * because a simple equality check will fail when running
- * across different vms / iframes.
- */
-function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
-  return match ? match[1] : ''
-}
-
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
-  }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
-    }
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
-        }
-      }
-    }
-  }
-  globalHandleError(err, vm, info);
-}
-
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
-    }
-  }
-  logError(err, vm, info);
-}
-
-function logError (err, vm, info) {
-  if (process.env.NODE_ENV !== 'production') {
-    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
-  }
-  /* istanbul ignore else */
-  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
-    console.error(err);
-  } else {
-    throw err
-  }
-}
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-var pending = false;
-
-function flushCallbacks () {
-  pending = false;
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  var p = Promise.resolve();
-  microTimerFunc = function () {
-    p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
-    // it can get stuck in a weird state where callbacks are pushed into the
-    // microtask queue but the queue isn't being flushed, until the browser
-    // needs to do some other work, e.g. handle a timer. Therefore we can
-    // "force" the microtask queue to be flushed by adding an empty timer.
-    if (isIOS) { setTimeout(noop); }
-  };
-} else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
-}
-
-function nextTick (cb, ctx) {
-  var _resolve;
-  callbacks.push(function () {
-    if (cb) {
-      try {
-        cb.call(ctx);
-      } catch (e) {
-        handleError(e, ctx, 'nextTick');
-      }
-    } else if (_resolve) {
-      _resolve(ctx);
-    }
-  });
-  if (!pending) {
-    pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
-  }
-  // $flow-disable-line
-  if (!cb && typeof Promise !== 'undefined') {
-    return new Promise(function (resolve) {
-      _resolve = resolve;
-    })
-  }
-}
-
-/*  */
-
-var mark;
-var measure;
-
-if (process.env.NODE_ENV !== 'production') {
-  var perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    mark = function (tag) { return perf.mark(tag); };
-    measure = function (name, startTag, endTag) {
-      perf.measure(name, startTag, endTag);
-      perf.clearMarks(startTag);
-      perf.clearMarks(endTag);
-      perf.clearMeasures(name);
-    };
-  }
-}
-
-/* not type checking this file because flow doesn't play well with Proxy */
-
-var initProxy;
-
-if (process.env.NODE_ENV !== 'production') {
-  var allowedGlobals = makeMap(
-    'Infinity,undefined,NaN,isFinite,isNaN,' +
-    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-    'require' // for Webpack/Browserify
-  );
-
-  var warnNonPresent = function (target, key) {
-    warn(
-      "Property or method \"" + key + "\" is not defined on the instance but " +
-      'referenced during render. Make sure that this property is reactive, ' +
-      'either in the data option, or for class-based components, by ' +
-      'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
-      target
-    );
-  };
-
-  var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
-
-  if (hasProxy) {
-    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      set: function set (target, key, value) {
-        if (isBuiltInModifier(key)) {
-          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-          return false
-        } else {
-          target[key] = value;
-          return true
-        }
-      }
-    });
-  }
-
-  var hasHandler = {
-    has: function has (target, key) {
-      var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
-      if (!has && !isAllowed) {
-        warnNonPresent(target, key);
-      }
-      return has || !isAllowed
-    }
-  };
-
-  var getHandler = {
-    get: function get (target, key) {
-      if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
-      }
-      return target[key]
-    }
-  };
-
-  initProxy = function initProxy (vm) {
-    if (hasProxy) {
-      // determine which proxy handler to use
-      var options = vm.$options;
-      var handlers = options.render && options.render._withStripped
-        ? getHandler
-        : hasHandler;
-      vm._renderProxy = new Proxy(vm, handlers);
-    } else {
-      vm._renderProxy = vm;
-    }
-  };
-}
-
-/*  */
-
-var seenObjects = new _Set();
-
-/**
- * Recursively traverse an object to evoke all converted
- * getters, so that every nested property inside the object
- * is collected as a "deep" dependency.
- */
-function traverse (val) {
-  _traverse(val, seenObjects);
-  seenObjects.clear();
-}
-
-function _traverse (val, seen) {
-  var i, keys;
-  var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
-    return
-  }
-  if (val.__ob__) {
-    var depId = val.__ob__.dep.id;
-    if (seen.has(depId)) {
-      return
-    }
-    seen.add(depId);
-  }
-  if (isA) {
-    i = val.length;
-    while (i--) { _traverse(val[i], seen); }
-  } else {
-    keys = Object.keys(val);
-    i = keys.length;
-    while (i--) { _traverse(val[keys[i]], seen); }
-  }
-}
-
-/*  */
-
-var normalizeEvent = cached(function (name) {
-  var passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  var capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name: name,
-    once: once$$1,
-    capture: capture,
-    passive: passive
-  }
-});
-
-function createFnInvoker (fns) {
-  function invoker () {
-    var arguments$1 = arguments;
-
-    var fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      var cloned = fns.slice();
-      for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
-      }
-    } else {
-      // return handler return value for single handlers
-      return fns.apply(null, arguments)
-    }
-  }
-  invoker.fns = fns;
-  return invoker
-}
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, def, cur, old, event;
-  for (name in on) {
-    def = cur = on[name];
-    old = oldOn[name];
-    event = normalizeEvent(name);
-    /* istanbul ignore if */
-    if (isUndef(cur)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
-        vm
-      );
-    } else if (isUndef(old)) {
-      if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
-      }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
-    } else if (cur !== old) {
-      old.fns = cur;
-      on[name] = old;
-    }
-  }
-  for (name in oldOn) {
-    if (isUndef(on[name])) {
-      event = normalizeEvent(name);
-      remove$$1(event.name, oldOn[name], event.capture);
-    }
-  }
-}
-
-/*  */
-
-function mergeVNodeHook (def, hookKey, hook) {
-  if (def instanceof VNode) {
-    def = def.data.hook || (def.data.hook = {});
-  }
-  var invoker;
-  var oldHook = def[hookKey];
-
-  function wrappedHook () {
-    hook.apply(this, arguments);
-    // important: remove merged hook to ensure it's called only once
-    // and prevent memory leak
-    remove(invoker.fns, wrappedHook);
-  }
-
-  if (isUndef(oldHook)) {
-    // no existing hook
-    invoker = createFnInvoker([wrappedHook]);
-  } else {
-    /* istanbul ignore if */
-    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
-      // already a merged invoker
-      invoker = oldHook;
-      invoker.fns.push(wrappedHook);
-    } else {
-      // existing plain hook
-      invoker = createFnInvoker([oldHook, wrappedHook]);
-    }
-  }
-
-  invoker.merged = true;
-  def[hookKey] = invoker;
-}
-
-/*  */
-
-function extractPropsFromVNodeData (
-  data,
-  Ctor,
-  tag
-) {
-  // we are only extracting raw values here.
-  // validation and default values are handled in the child
-  // component itself.
-  var propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
-  }
-  var res = {};
-  var attrs = data.attrs;
-  var props = data.props;
-  if (isDef(attrs) || isDef(props)) {
-    for (var key in propOptions) {
-      var altKey = hyphenate(key);
-      if (process.env.NODE_ENV !== 'production') {
-        var keyInLowerCase = key.toLowerCase();
-        if (
-          key !== keyInLowerCase &&
-          attrs && hasOwn(attrs, keyInLowerCase)
-        ) {
-          tip(
-            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-            " \"" + key + "\". " +
-            "Note that HTML attributes are case-insensitive and camelCased " +
-            "props need to use their kebab-case equivalents when using in-DOM " +
-            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
-          );
-        }
-      }
-      checkProp(res, props, key, altKey, true) ||
-      checkProp(res, attrs, key, altKey, false);
-    }
-  }
-  return res
-}
-
-function checkProp (
-  res,
-  hash,
-  key,
-  altKey,
-  preserve
-) {
-  if (isDef(hash)) {
-    if (hasOwn(hash, key)) {
-      res[key] = hash[key];
-      if (!preserve) {
-        delete hash[key];
-      }
-      return true
-    } else if (hasOwn(hash, altKey)) {
-      res[key] = hash[altKey];
-      if (!preserve) {
-        delete hash[altKey];
-      }
-      return true
-    }
-  }
-  return false
-}
-
-/*  */
-
-// The template compiler attempts to minimize the need for normalization by
-// statically analyzing the template at compile time.
-//
-// For plain HTML markup, normalization can be completely skipped because the
-// generated render function is guaranteed to return Array<VNode>. There are
-// two cases where extra normalization is needed:
-
-// 1. When the children contains components - because a functional component
-// may return an Array instead of a single root. In this case, just a simple
-// normalization is needed - if any child is an Array, we flatten the whole
-// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-// because functional components already normalize their own children.
-function simpleNormalizeChildren (children) {
-  for (var i = 0; i < children.length; i++) {
-    if (Array.isArray(children[i])) {
-      return Array.prototype.concat.apply([], children)
-    }
-  }
-  return children
-}
-
-// 2. When the children contains constructs that always generated nested Arrays,
-// e.g. <template>, <slot>, v-for, or when the children is provided by user
-// with hand-written render functions / JSX. In such cases a full normalization
-// is needed to cater to all possible types of children values.
-function normalizeChildren (children) {
-  return isPrimitive(children)
-    ? [createTextVNode(children)]
-    : Array.isArray(children)
-      ? normalizeArrayChildren(children)
-      : undefined
-}
-
-function isTextNode (node) {
-  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
-}
-
-function normalizeArrayChildren (children, nestedIndex) {
-  var res = [];
-  var i, c, lastIndex, last;
-  for (i = 0; i < children.length; i++) {
-    c = children[i];
-    if (isUndef(c) || typeof c === 'boolean') { continue }
-    lastIndex = res.length - 1;
-    last = res[lastIndex];
-    //  nested
-    if (Array.isArray(c)) {
-      if (c.length > 0) {
-        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-        // merge adjacent text nodes
-        if (isTextNode(c[0]) && isTextNode(last)) {
-          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-          c.shift();
-        }
-        res.push.apply(res, c);
-      }
-    } else if (isPrimitive(c)) {
-      if (isTextNode(last)) {
-        // merge adjacent text nodes
-        // this is necessary for SSR hydration because text nodes are
-        // essentially merged when rendered to HTML strings
-        res[lastIndex] = createTextVNode(last.text + c);
-      } else if (c !== '') {
-        // convert primitive to vnode
-        res.push(createTextVNode(c));
-      }
-    } else {
-      if (isTextNode(c) && isTextNode(last)) {
-        // merge adjacent text nodes
-        res[lastIndex] = createTextVNode(last.text + c.text);
-      } else {
-        // default key for nested array children (likely generated by v-for)
-        if (isTrue(children._isVList) &&
-          isDef(c.tag) &&
-          isUndef(c.key) &&
-          isDef(nestedIndex)) {
-          c.key = "__vlist" + nestedIndex + "_" + i + "__";
-        }
-        res.push(c);
-      }
-    }
-  }
-  return res
-}
-
-/*  */
-
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
-
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-var target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    if (process.env.NODE_ENV !== 'production') {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
-      }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
-
-
-
-/**
- * Runtime helper for resolving raw children VNodes into a slot object.
- */
-function resolveSlots (
-  children,
-  context
-) {
-  var slots = {};
-  if (!children) {
-    return slots
-  }
-  for (var i = 0, l = children.length; i < l; i++) {
-    var child = children[i];
-    var data = child.data;
-    // remove slot attribute if the node is resolved as a Vue slot node
-    if (data && data.attrs && data.attrs.slot) {
-      delete data.attrs.slot;
-    }
-    // named slots should only be respected if the vnode was rendered in the
-    // same context.
-    if ((child.context === context || child.fnContext === context) &&
-      data && data.slot != null
-    ) {
-      var name = data.slot;
-      var slot = (slots[name] || (slots[name] = []));
-      if (child.tag === 'template') {
-        slot.push.apply(slot, child.children || []);
-      } else {
-        slot.push(child);
-      }
-    } else {
-      (slots.default || (slots.default = [])).push(child);
-    }
-  }
-  // ignore slots that contains only whitespace
-  for (var name$1 in slots) {
-    if (slots[name$1].every(isWhitespace)) {
-      delete slots[name$1];
-    }
-  }
-  return slots
-}
-
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
-
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var activeInstance = null;
-var isUpdatingChildComponent = false;
-
-function initLifecycle (vm) {
-  var options = vm.$options;
-
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
-    }
-    parent.$children.push(vm);
-  }
-
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
-
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
-}
-
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
-
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
-
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
-    }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
-    }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
-    }
-  };
-}
-
-function mountComponent (
-  vm,
-  el,
-  hydrating
-) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    if (process.env.NODE_ENV !== 'production') {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
-      }
-    }
-  }
-  callHook(vm, 'beforeMount');
-
-  var updateComponent;
-  /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
-  } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
-  }
-
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
-  }
-  return vm
-}
-
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = true;
-  }
-
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
-
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
-
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
-
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
-
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
-
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
-
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = false;
-  }
-}
-
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
-  }
-  return false
-}
-
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
-
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
-
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
-      }
-    }
-  }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
-
-/*  */
-
-
-var MAX_UPDATE_COUNT = 100;
-
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
-
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  if (process.env.NODE_ENV !== 'production') {
-    circular = {};
-  }
-  waiting = flushing = false;
-}
-
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
-
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
-        );
-        break
-      }
-    }
-  }
-
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
-
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
-  }
-}
-
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
-  }
-}
-
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
-  }
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
-      }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
-    }
-  }
-}
-
-/*  */
-
-var uid$2 = 0;
-
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
-) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
-  }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
-  } else {
-    this.deep = this.user = this.lazy = this.sync = false;
-  }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = process.env.NODE_ENV !== 'production'
-    ? expOrFn.toString()
-    : '';
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
-  } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
-    }
-  }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
-
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
-    } else {
-      throw e
-    }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    popTarget();
-    this.cleanupDeps();
-  }
-  return value
-};
-
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
-    }
-  }
-};
-
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
-
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
-    }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
-
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
-  } else {
-    queueWatcher(this);
-  }
-};
-
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
-      } else {
-        this.cb.call(this.vm, value, oldValue);
-      }
-    }
-  }
-};
-
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
-
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
-
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
-  }
-};
-
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
-
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
-    }
-    this.active = false;
-  }
-};
-
-/*  */
-
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
-
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
-  }
-}
-
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
-        }
-      });
-    } else {
-      defineReactive(props, key, value);
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
-    }
-  };
-
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
-}
-
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
-      }
-    }
-    if (props && hasOwn(props, key)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
-    }
-  }
-  // observe data
-  observe(data, true /* asRootData */);
-}
-
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
-  }
-}
-
-var computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
-
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (process.env.NODE_ENV !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
-    }
-
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
-    }
-
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else if (process.env.NODE_ENV !== 'production') {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
-    }
-  }
-}
-
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
-    }
-  }
-}
-
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
-      }
-    }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
-  }
-}
-
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
-      }
-    } else {
-      createWatcher(vm, key, handler);
-    }
-  }
-}
-
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
-}
-
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
-  }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
-
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
-
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
-    }
-    return function unwatchFn () {
-      watcher.teardown();
-    }
-  };
-}
-
-/*  */
-
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
-
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
-      } else {
-        defineReactive(vm, key, result[key]);
-      }
-    });
-    observerState.shouldConvert = true;
-  }
-}
-
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
-
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
-      }
-    }
-    return result
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
-        );
-      }
-      slotNodes._rendered = true;
-    }
-    nodes = slotNodes || fallback;
-  }
-
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
-
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
-
-      for (var key in value) loop( key );
-    }
-  }
-  return data
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
-
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
-
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
-    }
-  } else {
-    markStaticNode(tree, key, isOnce);
-  }
-}
-
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
-
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
-/*  */
-
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
-      }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
-    }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
-  }
-
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
-
-  var vnode = options.render.call(null, renderContext._c, renderContext);
-
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
-    }
-  }
-
-  return vnode
-}
-
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
-  }
-}
-
-/*  */
-
-
-
-
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
-
-
-// Updates the state of the component to weex native render engine.
-
-/*  */
-
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
-
-// listening on native callback
-
-/*  */
-
-/*  */
-
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  },
-
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  }
-};
-
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  var baseCtor = context.$options._base;
-
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
-
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
-    }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
-    }
-  }
-
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
-
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
-
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
-
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
-  }
-
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
-
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
-
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
-    }
-  }
-
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
-
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
-
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
-
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
-}
-
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
-
-/*  */
-
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
-
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
-  }
-  return _createElement(context, tag, data, children, normalizationType)
-}
-
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
-  }
-  // warn against non-primitive key
-  if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
-    }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
-    }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  } else {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, null, true);
-  }
-}
-
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
-
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
-
-  Vue.prototype._render = function () {
-    var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
-
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
-    }
-
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      } else {
-        vnode = vm._vnode;
-      }
-    }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
-    }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
-  };
-}
-
-/*  */
-
-var uid$1 = 0;
-
-function initMixin (Vue) {
-  Vue.prototype._init = function (options) {
-    var vm = this;
-    // a uid
-    vm._uid = uid$1++;
-
-    var startTag, endTag;
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-      startTag = "vue-perf-start:" + (vm._uid);
-      endTag = "vue-perf-end:" + (vm._uid);
-      mark(startTag);
-    }
-
-    // a flag to avoid this being observed
-    vm._isVue = true;
-    // merge options
-    if (options && options._isComponent) {
-      // optimize internal component instantiation
-      // since dynamic options merging is pretty slow, and none of the
-      // internal component options needs special treatment.
-      initInternalComponent(vm, options);
-    } else {
-      vm.$options = mergeOptions(
-        resolveConstructorOptions(vm.constructor),
-        options || {},
-        vm
-      );
-    }
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      initProxy(vm);
-    } else {
-      vm._renderProxy = vm;
-    }
-    // expose real self
-    vm._self = vm;
-    initLifecycle(vm);
-    initEvents(vm);
-    initRender(vm);
-    callHook(vm, 'beforeCreate');
-    initInjections(vm); // resolve injections before data/props
-    initState(vm);
-    initProvide(vm); // resolve provide after data/props
-    callHook(vm, 'created');
-
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-      vm._name = formatComponentName(vm, false);
-      mark(endTag);
-      measure(("vue " + (vm._name) + " init"), startTag, endTag);
-    }
-
-    if (vm.$options.el) {
-      vm.$mount(vm.$options.el);
-    }
-  };
-}
-
-function initInternalComponent (vm, options) {
-  var opts = vm.$options = Object.create(vm.constructor.options);
-  // doing this because it's faster than dynamic enumeration.
-  var parentVnode = options._parentVnode;
-  opts.parent = options.parent;
-  opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
-
-  var vnodeComponentOptions = parentVnode.componentOptions;
-  opts.propsData = vnodeComponentOptions.propsData;
-  opts._parentListeners = vnodeComponentOptions.listeners;
-  opts._renderChildren = vnodeComponentOptions.children;
-  opts._componentTag = vnodeComponentOptions.tag;
-
-  if (options.render) {
-    opts.render = options.render;
-    opts.staticRenderFns = options.staticRenderFns;
-  }
-}
-
-function resolveConstructorOptions (Ctor) {
-  var options = Ctor.options;
-  if (Ctor.super) {
-    var superOptions = resolveConstructorOptions(Ctor.super);
-    var cachedSuperOptions = Ctor.superOptions;
-    if (superOptions !== cachedSuperOptions) {
-      // super option changed,
-      // need to resolve new options.
-      Ctor.superOptions = superOptions;
-      // check if there are any late-modified/attached options (#4976)
-      var modifiedOptions = resolveModifiedOptions(Ctor);
-      // update base extend options
-      if (modifiedOptions) {
-        extend(Ctor.extendOptions, modifiedOptions);
-      }
-      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-      if (options.name) {
-        options.components[options.name] = Ctor;
-      }
-    }
-  }
-  return options
-}
-
-function resolveModifiedOptions (Ctor) {
-  var modified;
-  var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
-  var sealed = Ctor.sealedOptions;
-  for (var key in latest) {
-    if (latest[key] !== sealed[key]) {
-      if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-    }
-  }
-  return modified
-}
-
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
-  if (process.env.NODE_ENV !== 'production' &&
-    !(this instanceof Vue$3)
-  ) {
-    warn('Vue is a constructor and should be called with the `new` keyword');
-  }
-  this._init(options);
-}
-
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
-
-/*  */
-
-function initUse (Vue) {
-  Vue.use = function (plugin) {
-    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-    if (installedPlugins.indexOf(plugin) > -1) {
-      return this
-    }
-
-    // additional parameters
-    var args = toArray(arguments, 1);
-    args.unshift(this);
-    if (typeof plugin.install === 'function') {
-      plugin.install.apply(plugin, args);
-    } else if (typeof plugin === 'function') {
-      plugin.apply(null, args);
-    }
-    installedPlugins.push(plugin);
-    return this
-  };
-}
-
-/*  */
-
-function initMixin$1 (Vue) {
-  Vue.mixin = function (mixin) {
-    this.options = mergeOptions(this.options, mixin);
-    return this
-  };
-}
-
-/*  */
-
-function initExtend (Vue) {
-  /**
-   * Each instance constructor, including Vue, has a unique
-   * cid. This enables us to create wrapped "child
-   * constructors" for prototypal inheritance and cache them.
-   */
-  Vue.cid = 0;
-  var cid = 1;
-
-  /**
-   * Class inheritance
-   */
-  Vue.extend = function (extendOptions) {
-    extendOptions = extendOptions || {};
-    var Super = this;
-    var SuperId = Super.cid;
-    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-    if (cachedCtors[SuperId]) {
-      return cachedCtors[SuperId]
-    }
-
-    var name = extendOptions.name || Super.options.name;
-    if (process.env.NODE_ENV !== 'production' && name) {
-      validateComponentName(name);
-    }
-
-    var Sub = function VueComponent (options) {
-      this._init(options);
-    };
-    Sub.prototype = Object.create(Super.prototype);
-    Sub.prototype.constructor = Sub;
-    Sub.cid = cid++;
-    Sub.options = mergeOptions(
-      Super.options,
-      extendOptions
-    );
-    Sub['super'] = Super;
-
-    // For props and computed properties, we define the proxy getters on
-    // the Vue instances at extension time, on the extended prototype. This
-    // avoids Object.defineProperty calls for each instance created.
-    if (Sub.options.props) {
-      initProps$1(Sub);
-    }
-    if (Sub.options.computed) {
-      initComputed$1(Sub);
-    }
-
-    // allow further extension/mixin/plugin usage
-    Sub.extend = Super.extend;
-    Sub.mixin = Super.mixin;
-    Sub.use = Super.use;
-
-    // create asset registers, so extended classes
-    // can have their private assets too.
-    ASSET_TYPES.forEach(function (type) {
-      Sub[type] = Super[type];
-    });
-    // enable recursive self-lookup
-    if (name) {
-      Sub.options.components[name] = Sub;
-    }
-
-    // keep a reference to the super options at extension time.
-    // later at instantiation we can check if Super's options have
-    // been updated.
-    Sub.superOptions = Super.options;
-    Sub.extendOptions = extendOptions;
-    Sub.sealedOptions = extend({}, Sub.options);
-
-    // cache constructor
-    cachedCtors[SuperId] = Sub;
-    return Sub
-  };
-}
-
-function initProps$1 (Comp) {
-  var props = Comp.options.props;
-  for (var key in props) {
-    proxy(Comp.prototype, "_props", key);
-  }
-}
-
-function initComputed$1 (Comp) {
-  var computed = Comp.options.computed;
-  for (var key in computed) {
-    defineComputed(Comp.prototype, key, computed[key]);
-  }
-}
-
-/*  */
-
-function initAssetRegisters (Vue) {
-  /**
-   * Create asset registration methods.
-   */
-  ASSET_TYPES.forEach(function (type) {
-    Vue[type] = function (
-      id,
-      definition
-    ) {
-      if (!definition) {
-        return this.options[type + 's'][id]
-      } else {
-        /* istanbul ignore if */
-        if (process.env.NODE_ENV !== 'production' && type === 'component') {
-          validateComponentName(id);
-        }
-        if (type === 'component' && isPlainObject(definition)) {
-          definition.name = definition.name || id;
-          definition = this.options._base.extend(definition);
-        }
-        if (type === 'directive' && typeof definition === 'function') {
-          definition = { bind: definition, update: definition };
-        }
-        this.options[type + 's'][id] = definition;
-        return definition
-      }
-    };
-  });
-}
-
-/*  */
-
-function getComponentName (opts) {
-  return opts && (opts.Ctor.options.name || opts.tag)
-}
-
-function matches (pattern, name) {
-  if (Array.isArray(pattern)) {
-    return pattern.indexOf(name) > -1
-  } else if (typeof pattern === 'string') {
-    return pattern.split(',').indexOf(name) > -1
-  } else if (isRegExp(pattern)) {
-    return pattern.test(name)
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-function pruneCache (keepAliveInstance, filter) {
-  var cache = keepAliveInstance.cache;
-  var keys = keepAliveInstance.keys;
-  var _vnode = keepAliveInstance._vnode;
-  for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
-      if (name && !filter(name)) {
-        pruneCacheEntry(cache, key, keys, _vnode);
-      }
-    }
-  }
-}
-
-function pruneCacheEntry (
-  cache,
-  key,
-  keys,
-  current
-) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
-  }
-  cache[key] = null;
-  remove(keys, key);
-}
-
-var patternTypes = [String, RegExp, Array];
-
-var KeepAlive = {
-  name: 'keep-alive',
-  abstract: true,
-
-  props: {
-    include: patternTypes,
-    exclude: patternTypes,
-    max: [String, Number]
-  },
-
-  created: function created () {
-    this.cache = Object.create(null);
-    this.keys = [];
-  },
-
-  destroyed: function destroyed () {
-    var this$1 = this;
-
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
-    }
-  },
-
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
-  },
-
-  render: function render () {
-    var slot = this.$slots.default;
-    var vnode = getFirstComponentChild(slot);
-    var componentOptions = vnode && vnode.componentOptions;
-    if (componentOptions) {
-      // check pattern
-      var name = getComponentName(componentOptions);
-      var ref = this;
-      var include = ref.include;
-      var exclude = ref.exclude;
-      if (
-        // not included
-        (include && (!name || !matches(include, name))) ||
-        // excluded
-        (exclude && name && matches(exclude, name))
-      ) {
-        return vnode
-      }
-
-      var ref$1 = this;
-      var cache = ref$1.cache;
-      var keys = ref$1.keys;
-      var key = vnode.key == null
-        // same constructor may get registered as different local components
-        // so cid alone is not enough (#3269)
-        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
-        : vnode.key;
-      if (cache[key]) {
-        vnode.componentInstance = cache[key].componentInstance;
-        // make current key freshest
-        remove(keys, key);
-        keys.push(key);
-      } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
-      }
-
-      vnode.data.keepAlive = true;
-    }
-    return vnode || (slot && slot[0])
-  }
-};
-
-var builtInComponents = {
-  KeepAlive: KeepAlive
-};
-
-/*  */
-
-function initGlobalAPI (Vue) {
-  // config
-  var configDef = {};
-  configDef.get = function () { return config; };
-  if (process.env.NODE_ENV !== 'production') {
-    configDef.set = function () {
-      warn(
-        'Do not replace the Vue.config object, set individual fields instead.'
-      );
-    };
-  }
-  Object.defineProperty(Vue, 'config', configDef);
-
-  // exposed util methods.
-  // NOTE: these are not considered part of the public API - avoid relying on
-  // them unless you are aware of the risk.
-  Vue.util = {
-    warn: warn,
-    extend: extend,
-    mergeOptions: mergeOptions,
-    defineReactive: defineReactive
-  };
-
-  Vue.set = set;
-  Vue.delete = del;
-  Vue.nextTick = nextTick;
-
-  Vue.options = Object.create(null);
-  ASSET_TYPES.forEach(function (type) {
-    Vue.options[type + 's'] = Object.create(null);
-  });
-
-  // this is used to identify the "base" constructor to extend all plain-object
-  // components with in Weex's multi-instance scenarios.
-  Vue.options._base = Vue;
-
-  extend(Vue.options.components, builtInComponents);
-
-  initUse(Vue);
-  initMixin$1(Vue);
-  initExtend(Vue);
-  initAssetRegisters(Vue);
-}
-
-initGlobalAPI(Vue$3);
-
-Object.defineProperty(Vue$3.prototype, '$isServer', {
-  get: isServerRendering
-});
-
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
-  get: function get () {
-    /* istanbul ignore next */
-    return this.$vnode && this.$vnode.ssrContext
-  }
-});
-
-Vue$3.version = '2.5.13';
-
-/*  */
-
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
-
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
-
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
-
-var xlinkNS = 'http://www.w3.org/1999/xlink';
-
-var isXlink = function (name) {
-  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-};
-
-var getXlinkProp = function (name) {
-  return isXlink(name) ? name.slice(6, name.length) : ''
-};
-
-var isFalsyAttrValue = function (val) {
-  return val == null || val === false
-};
-
-/*  */
-
-function genClassForVnode (vnode) {
-  var data = vnode.data;
-  var parentNode = vnode;
-  var childNode = vnode;
-  while (isDef(childNode.componentInstance)) {
-    childNode = childNode.componentInstance._vnode;
-    if (childNode && childNode.data) {
-      data = mergeClassData(childNode.data, data);
-    }
-  }
-  while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode && parentNode.data) {
-      data = mergeClassData(data, parentNode.data);
-    }
-  }
-  return renderClass(data.staticClass, data.class)
-}
-
-function mergeClassData (child, parent) {
-  return {
-    staticClass: concat(child.staticClass, parent.staticClass),
-    class: isDef(child.class)
-      ? [child.class, parent.class]
-      : parent.class
-  }
-}
-
-function renderClass (
-  staticClass,
-  dynamicClass
-) {
-  if (isDef(staticClass) || isDef(dynamicClass)) {
-    return concat(staticClass, stringifyClass(dynamicClass))
-  }
-  /* istanbul ignore next */
-  return ''
-}
-
-function concat (a, b) {
-  return a ? b ? (a + ' ' + b) : a : (b || '')
-}
-
-function stringifyClass (value) {
-  if (Array.isArray(value)) {
-    return stringifyArray(value)
-  }
-  if (isObject(value)) {
-    return stringifyObject(value)
-  }
-  if (typeof value === 'string') {
-    return value
-  }
-  /* istanbul ignore next */
-  return ''
-}
-
-function stringifyArray (value) {
-  var res = '';
-  var stringified;
-  for (var i = 0, l = value.length; i < l; i++) {
-    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-      if (res) { res += ' '; }
-      res += stringified;
-    }
-  }
-  return res
-}
-
-function stringifyObject (value) {
-  var res = '';
-  for (var key in value) {
-    if (value[key]) {
-      if (res) { res += ' '; }
-      res += key;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var namespaceMap = {
-  svg: 'http://www.w3.org/2000/svg',
-  math: 'http://www.w3.org/1998/Math/MathML'
-};
-
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
-
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
-
-var isPreTag = function (tag) { return tag === 'pre'; };
-
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
-
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
-  }
-}
-
-var unknownElementCache = Object.create(null);
-function isUnknownElement (tag) {
-  /* istanbul ignore if */
-  if (!inBrowser) {
-    return true
-  }
-  if (isReservedTag(tag)) {
-    return false
-  }
-  tag = tag.toLowerCase();
-  /* istanbul ignore if */
-  if (unknownElementCache[tag] != null) {
-    return unknownElementCache[tag]
-  }
-  var el = document.createElement(tag);
-  if (tag.indexOf('-') > -1) {
-    // http://stackoverflow.com/a/28210364/1070244
-    return (unknownElementCache[tag] = (
-      el.constructor === window.HTMLUnknownElement ||
-      el.constructor === window.HTMLElement
-    ))
-  } else {
-    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
-  }
-}
-
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
-
-/*  */
-
-/**
- * Query an element selector if it's not an element already.
- */
-function query (el) {
-  if (typeof el === 'string') {
-    var selected = document.querySelector(el);
-    if (!selected) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'Cannot find element: ' + el
-      );
-      return document.createElement('div')
-    }
-    return selected
-  } else {
-    return el
-  }
-}
-
-/*  */
-
-function createElement$1 (tagName, vnode) {
-  var elm = document.createElement(tagName);
-  if (tagName !== 'select') {
-    return elm
-  }
-  // false or null will remove the attribute but undefined will not
-  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
-    elm.setAttribute('multiple', 'multiple');
-  }
-  return elm
-}
-
-function createElementNS (namespace, tagName) {
-  return document.createElementNS(namespaceMap[namespace], tagName)
-}
-
-function createTextNode (text) {
-  return document.createTextNode(text)
-}
-
-function createComment (text) {
-  return document.createComment(text)
-}
-
-function insertBefore (parentNode, newNode, referenceNode) {
-  parentNode.insertBefore(newNode, referenceNode);
-}
-
-function removeChild (node, child) {
-  node.removeChild(child);
-}
-
-function appendChild (node, child) {
-  node.appendChild(child);
-}
-
-function parentNode (node) {
-  return node.parentNode
-}
-
-function nextSibling (node) {
-  return node.nextSibling
-}
-
-function tagName (node) {
-  return node.tagName
-}
-
-function setTextContent (node, text) {
-  node.textContent = text;
-}
-
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
-}
-
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
-});
-
-/*  */
-
-var ref = {
-  create: function create (_, vnode) {
-    registerRef(vnode);
-  },
-  update: function update (oldVnode, vnode) {
-    if (oldVnode.data.ref !== vnode.data.ref) {
-      registerRef(oldVnode, true);
-      registerRef(vnode);
-    }
-  },
-  destroy: function destroy (vnode) {
-    registerRef(vnode, true);
-  }
-};
-
-function registerRef (vnode, isRemoval) {
-  var key = vnode.data.ref;
-  if (!key) { return }
-
-  var vm = vnode.context;
-  var ref = vnode.componentInstance || vnode.elm;
-  var refs = vm.$refs;
-  if (isRemoval) {
-    if (Array.isArray(refs[key])) {
-      remove(refs[key], ref);
-    } else if (refs[key] === ref) {
-      refs[key] = undefined;
-    }
-  } else {
-    if (vnode.data.refInFor) {
-      if (!Array.isArray(refs[key])) {
-        refs[key] = [ref];
-      } else if (refs[key].indexOf(ref) < 0) {
-        // $flow-disable-line
-        refs[key].push(ref);
-      }
-    } else {
-      refs[key] = ref;
-    }
-  }
-}
-
-/**
- * Virtual DOM patching algorithm based on Snabbdom by
- * Simon Friis Vindum (@paldepind)
- * Licensed under the MIT License
- * https://github.com/paldepind/snabbdom/blob/master/LICENSE
- *
- * modified by Evan You (@yyx990803)
- *
- * Not type-checking this because this file is perf-critical and the cost
- * of making flow understand it is not worth it.
- */
-
-var emptyNode = new VNode('', {}, []);
-
-var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
-
-function sameVnode (a, b) {
-  return (
-    a.key === b.key && (
-      (
-        a.tag === b.tag &&
-        a.isComment === b.isComment &&
-        isDef(a.data) === isDef(b.data) &&
-        sameInputType(a, b)
-      ) || (
-        isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
-        isUndef(b.asyncFactory.error)
-      )
-    )
-  )
-}
-
-function sameInputType (a, b) {
-  if (a.tag !== 'input') { return true }
-  var i;
-  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-}
-
-function createKeyToOldIdx (children, beginIdx, endIdx) {
-  var i, key;
-  var map = {};
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) { map[key] = i; }
-  }
-  return map
-}
-
-function createPatchFunction (backend) {
-  var i, j;
-  var cbs = {};
-
-  var modules = backend.modules;
-  var nodeOps = backend.nodeOps;
-
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (isDef(modules[j][hooks[i]])) {
-        cbs[hooks[i]].push(modules[j][hooks[i]]);
-      }
-    }
-  }
-
-  function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
-  }
-
-  function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
-        removeNode(childElm);
-      }
-    }
-    remove.listeners = listeners;
-    return remove
-  }
-
-  function removeNode (el) {
-    var parent = nodeOps.parentNode(el);
-    // element may have already been removed due to v-html / v-text
-    if (isDef(parent)) {
-      nodeOps.removeChild(parent, el);
-    }
-  }
-
-  function isUnknownElement$$1 (vnode, inVPre) {
-    return (
-      !inVPre &&
-      !vnode.ns &&
-      !(
-        config.ignoredElements.length &&
-        config.ignoredElements.some(function (ignore) {
-          return isRegExp(ignore)
-            ? ignore.test(vnode.tag)
-            : ignore === vnode.tag
-        })
-      ) &&
-      config.isUnknownElement(vnode.tag)
-    )
-  }
-
-  var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
-    vnode.isRootInsert = !nested; // for transition enter check
-    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
-      return
-    }
-
-    var data = vnode.data;
-    var children = vnode.children;
-    var tag = vnode.tag;
-    if (isDef(tag)) {
-      if (process.env.NODE_ENV !== 'production') {
-        if (data && data.pre) {
-          creatingElmInVPre++;
-        }
-        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
-          warn(
-            'Unknown custom element: <' + tag + '> - did you ' +
-            'register the component correctly? For recursive components, ' +
-            'make sure to provide the "name" option.',
-            vnode.context
-          );
-        }
-      }
-      vnode.elm = vnode.ns
-        ? nodeOps.createElementNS(vnode.ns, tag)
-        : nodeOps.createElement(tag, vnode);
-      setScope(vnode);
-
-      /* istanbul ignore if */
-      {
-        createChildren(vnode, children, insertedVnodeQueue);
-        if (isDef(data)) {
-          invokeCreateHooks(vnode, insertedVnodeQueue);
-        }
-        insert(parentElm, vnode.elm, refElm);
-      }
-
-      if (process.env.NODE_ENV !== 'production' && data && data.pre) {
-        creatingElmInVPre--;
-      }
-    } else if (isTrue(vnode.isComment)) {
-      vnode.elm = nodeOps.createComment(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    } else {
-      vnode.elm = nodeOps.createTextNode(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    }
-  }
-
-  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i = vnode.data;
-    if (isDef(i)) {
-      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
-      if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
-      }
-      // after calling the init hook, if the vnode is a child component
-      // it should've created a child instance and mounted it. the child
-      // component also has set the placeholder vnode's elm.
-      // in that case we can just return the element and be done.
-      if (isDef(vnode.componentInstance)) {
-        initComponent(vnode, insertedVnodeQueue);
-        if (isTrue(isReactivated)) {
-          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
-        }
-        return true
-      }
-    }
-  }
-
-  function initComponent (vnode, insertedVnodeQueue) {
-    if (isDef(vnode.data.pendingInsert)) {
-      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
-      vnode.data.pendingInsert = null;
-    }
-    vnode.elm = vnode.componentInstance.$el;
-    if (isPatchable(vnode)) {
-      invokeCreateHooks(vnode, insertedVnodeQueue);
-      setScope(vnode);
-    } else {
-      // empty component root.
-      // skip all element-related modules except for ref (#3455)
-      registerRef(vnode);
-      // make sure to invoke the insert hook
-      insertedVnodeQueue.push(vnode);
-    }
-  }
-
-  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i;
-    // hack for #4339: a reactivated component with inner transition
-    // does not trigger because the inner node's created hooks are not called
-    // again. It's not ideal to involve module-specific logic in here but
-    // there doesn't seem to be a better way to do it.
-    var innerNode = vnode;
-    while (innerNode.componentInstance) {
-      innerNode = innerNode.componentInstance._vnode;
-      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
-        for (i = 0; i < cbs.activate.length; ++i) {
-          cbs.activate[i](emptyNode, innerNode);
-        }
-        insertedVnodeQueue.push(innerNode);
-        break
-      }
-    }
-    // unlike a newly created component,
-    // a reactivated keep-alive component doesn't insert itself
-    insert(parentElm, vnode.elm, refElm);
-  }
-
-  function insert (parent, elm, ref$$1) {
-    if (isDef(parent)) {
-      if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
-          nodeOps.insertBefore(parent, elm, ref$$1);
-        }
-      } else {
-        nodeOps.appendChild(parent, elm);
-      }
-    }
-  }
-
-  function createChildren (vnode, children, insertedVnodeQueue) {
-    if (Array.isArray(children)) {
-      if (process.env.NODE_ENV !== 'production') {
-        checkDuplicateKeys(children);
-      }
-      for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
-      }
-    } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
-    }
-  }
-
-  function isPatchable (vnode) {
-    while (vnode.componentInstance) {
-      vnode = vnode.componentInstance._vnode;
-    }
-    return isDef(vnode.tag)
-  }
-
-  function invokeCreateHooks (vnode, insertedVnodeQueue) {
-    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-      cbs.create[i$1](emptyNode, vnode);
-    }
-    i = vnode.data.hook; // Reuse variable
-    if (isDef(i)) {
-      if (isDef(i.create)) { i.create(emptyNode, vnode); }
-      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
-    }
-  }
-
-  // set scope id attribute for scoped CSS.
-  // this is implemented as a special case to avoid the overhead
-  // of going through the normal attribute patching process.
-  function setScope (vnode) {
-    var i;
-    if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    } else {
-      var ancestor = vnode;
-      while (ancestor) {
-        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
-        }
-        ancestor = ancestor.parent;
-      }
-    }
-    // for slot content they should also get the scopeId from the host instance.
-    if (isDef(i = activeInstance) &&
-      i !== vnode.context &&
-      i !== vnode.fnContext &&
-      isDef(i = i.$options._scopeId)
-    ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    }
-  }
-
-  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
-    }
-  }
-
-  function invokeDestroyHook (vnode) {
-    var i, j;
-    var data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
-      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
-    }
-    if (isDef(i = vnode.children)) {
-      for (j = 0; j < vnode.children.length; ++j) {
-        invokeDestroyHook(vnode.children[j]);
-      }
-    }
-  }
-
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.tag)) {
-          removeAndInvokeRemoveHook(ch);
-          invokeDestroyHook(ch);
-        } else { // Text node
-          removeNode(ch.elm);
-        }
-      }
-    }
-  }
-
-  function removeAndInvokeRemoveHook (vnode, rm) {
-    if (isDef(rm) || isDef(vnode.data)) {
-      var i;
-      var listeners = cbs.remove.length + 1;
-      if (isDef(rm)) {
-        // we have a recursively passed down rm callback
-        // increase the listeners count
-        rm.listeners += listeners;
-      } else {
-        // directly removing
-        rm = createRmCb(vnode.elm, listeners);
-      }
-      // recursively invoke hooks on child component root node
-      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
-        removeAndInvokeRemoveHook(i, rm);
-      }
-      for (i = 0; i < cbs.remove.length; ++i) {
-        cbs.remove[i](vnode, rm);
-      }
-      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
-        i(vnode, rm);
-      } else {
-        rm();
-      }
-    } else {
-      removeNode(vnode.elm);
-    }
-  }
-
-  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
-    var oldStartIdx = 0;
-    var newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
-
-    // removeOnly is a special flag used only by <transition-group>
-    // to ensure removed elements stay in correct relative positions
-    // during leaving transitions
-    var canMove = !removeOnly;
-
-    if (process.env.NODE_ENV !== 'production') {
-      checkDuplicateKeys(newCh);
-    }
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-        oldEndVnode = oldCh[--oldEndIdx];
-      } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
-        oldStartVnode = oldCh[++oldStartIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else {
-        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
-        idxInOld = isDef(newStartVnode.key)
-          ? oldKeyToIdx[newStartVnode.key]
-          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
-        if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-        } else {
-          vnodeToMove = oldCh[idxInOld];
-          if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
-          } else {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-          }
-        }
-        newStartVnode = newCh[++newStartIdx];
-      }
-    }
-    if (oldStartIdx > oldEndIdx) {
-      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function checkDuplicateKeys (children) {
-    var seenKeys = {};
-    for (var i = 0; i < children.length; i++) {
-      var vnode = children[i];
-      var key = vnode.key;
-      if (isDef(key)) {
-        if (seenKeys[key]) {
-          warn(
-            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
-            vnode.context
-          );
-        } else {
-          seenKeys[key] = true;
-        }
-      }
-    }
-  }
-
-  function findIdxInOld (node, oldCh, start, end) {
-    for (var i = start; i < end; i++) {
-      var c = oldCh[i];
-      if (isDef(c) && sameVnode(node, c)) { return i }
-    }
-  }
-
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
-    if (oldVnode === vnode) {
-      return
-    }
-
-    var elm = vnode.elm = oldVnode.elm;
-
-    if (isTrue(oldVnode.isAsyncPlaceholder)) {
-      if (isDef(vnode.asyncFactory.resolved)) {
-        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
-      } else {
-        vnode.isAsyncPlaceholder = true;
-      }
-      return
-    }
-
-    // reuse element for static trees.
-    // note we only do this if the vnode is cloned -
-    // if the new node is not cloned it means the render functions have been
-    // reset by the hot-reload-api and we need to do a proper re-render.
-    if (isTrue(vnode.isStatic) &&
-      isTrue(oldVnode.isStatic) &&
-      vnode.key === oldVnode.key &&
-      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
-    ) {
-      vnode.componentInstance = oldVnode.componentInstance;
-      return
-    }
-
-    var i;
-    var data = vnode.data;
-    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-      i(oldVnode, vnode);
-    }
-
-    var oldCh = oldVnode.children;
-    var ch = vnode.children;
-    if (isDef(data) && isPatchable(vnode)) {
-      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
-      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
-    }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
-      } else if (isDef(ch)) {
-        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      } else if (isDef(oldVnode.text)) {
-        nodeOps.setTextContent(elm, '');
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      nodeOps.setTextContent(elm, vnode.text);
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
-    }
-  }
-
-  function invokeInsertHook (vnode, queue, initial) {
-    // delay insert hooks for component root nodes, invoke them after the
-    // element is really inserted
-    if (isTrue(initial) && isDef(vnode.parent)) {
-      vnode.parent.data.pendingInsert = queue;
-    } else {
-      for (var i = 0; i < queue.length; ++i) {
-        queue[i].data.hook.insert(queue[i]);
-      }
-    }
-  }
-
-  var hydrationBailed = false;
-  // list of modules that can skip create hook during hydration because they
-  // are already rendered on the client or has no need for initialization
-  // Note: style is excluded because it relies on initial clone for future
-  // deep updates (#7063).
-  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
-
-  // Note: this is a browser-only function so we can assume elms are DOM nodes.
-  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
-    var i;
-    var tag = vnode.tag;
-    var data = vnode.data;
-    var children = vnode.children;
-    inVPre = inVPre || (data && data.pre);
-    vnode.elm = elm;
-
-    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
-      vnode.isAsyncPlaceholder = true;
-      return true
-    }
-    // assert node match
-    if (process.env.NODE_ENV !== 'production') {
-      if (!assertNodeMatch(elm, vnode, inVPre)) {
-        return false
-      }
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
-      if (isDef(i = vnode.componentInstance)) {
-        // child component. it should have hydrated its own tree.
-        initComponent(vnode, insertedVnodeQueue);
-        return true
-      }
-    }
-    if (isDef(tag)) {
-      if (isDef(children)) {
-        // empty element, allow client to pick up and populate children
-        if (!elm.hasChildNodes()) {
-          createChildren(vnode, children, insertedVnodeQueue);
-        } else {
-          // v-html and domProps: innerHTML
-          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
-            if (i !== elm.innerHTML) {
-              /* istanbul ignore if */
-              if (process.env.NODE_ENV !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('server innerHTML: ', i);
-                console.warn('client innerHTML: ', elm.innerHTML);
-              }
-              return false
-            }
-          } else {
-            // iterate and compare children lists
-            var childrenMatch = true;
-            var childNode = elm.firstChild;
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
-                childrenMatch = false;
-                break
-              }
-              childNode = childNode.nextSibling;
-            }
-            // if childNode is not null, it means the actual childNodes list is
-            // longer than the virtual children list.
-            if (!childrenMatch || childNode) {
-              /* istanbul ignore if */
-              if (process.env.NODE_ENV !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
-              }
-              return false
-            }
-          }
-        }
-      }
-      if (isDef(data)) {
-        var fullInvoke = false;
-        for (var key in data) {
-          if (!isRenderedModule(key)) {
-            fullInvoke = true;
-            invokeCreateHooks(vnode, insertedVnodeQueue);
-            break
-          }
-        }
-        if (!fullInvoke && data['class']) {
-          // ensure collecting deps for deep class bindings for future updates
-          traverse(data['class']);
-        }
-      }
-    } else if (elm.data !== vnode.text) {
-      elm.data = vnode.text;
-    }
-    return true
-  }
-
-  function assertNodeMatch (node, vnode, inVPre) {
-    if (isDef(vnode.tag)) {
-      return vnode.tag.indexOf('vue-component') === 0 || (
-        !isUnknownElement$$1(vnode, inVPre) &&
-        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
-      )
-    } else {
-      return node.nodeType === (vnode.isComment ? 8 : 3)
-    }
-  }
-
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
-    if (isUndef(vnode)) {
-      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
-      return
-    }
-
-    var isInitialPatch = false;
-    var insertedVnodeQueue = [];
-
-    if (isUndef(oldVnode)) {
-      // empty mount (likely as component), create new root element
-      isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
-    } else {
-      var isRealElement = isDef(oldVnode.nodeType);
-      if (!isRealElement && sameVnode(oldVnode, vnode)) {
-        // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
-      } else {
-        if (isRealElement) {
-          // mounting to a real element
-          // check if this is server-rendered content and if we can perform
-          // a successful hydration.
-          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
-            oldVnode.removeAttribute(SSR_ATTR);
-            hydrating = true;
-          }
-          if (isTrue(hydrating)) {
-            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
-              invokeInsertHook(vnode, insertedVnodeQueue, true);
-              return oldVnode
-            } else if (process.env.NODE_ENV !== 'production') {
-              warn(
-                'The client-side rendered virtual DOM tree is not matching ' +
-                'server-rendered content. This is likely caused by incorrect ' +
-                'HTML markup, for example nesting block-level elements inside ' +
-                '<p>, or missing <tbody>. Bailing hydration and performing ' +
-                'full client-side render.'
-              );
-            }
-          }
-          // either not server-rendered, or hydration failed.
-          // create an empty node and replace it
-          oldVnode = emptyNodeAt(oldVnode);
-        }
-
-        // replacing existing element
-        var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
-
-        // create new node
-        createElm(
-          vnode,
-          insertedVnodeQueue,
-          // extremely rare edge case: do not insert if old element is in a
-          // leaving transition. Only happens when combining transition +
-          // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
-          nodeOps.nextSibling(oldElm)
-        );
-
-        // update parent placeholder node element, recursively
-        if (isDef(vnode.parent)) {
-          var ancestor = vnode.parent;
-          var patchable = isPatchable(vnode);
-          while (ancestor) {
-            for (var i = 0; i < cbs.destroy.length; ++i) {
-              cbs.destroy[i](ancestor);
-            }
-            ancestor.elm = vnode.elm;
-            if (patchable) {
-              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                cbs.create[i$1](emptyNode, ancestor);
-              }
-              // #6513
-              // invoke insert hooks that may have been merged by create hooks.
-              // e.g. for directives that uses the "inserted" hook.
-              var insert = ancestor.data.hook.insert;
-              if (insert.merged) {
-                // start at index 1 to avoid re-invoking component mounted hook
-                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
-                  insert.fns[i$2]();
-                }
-              }
-            } else {
-              registerRef(ancestor);
-            }
-            ancestor = ancestor.parent;
-          }
-        }
-
-        // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
-        } else if (isDef(oldVnode.tag)) {
-          invokeDestroyHook(oldVnode);
-        }
-      }
-    }
-
-    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
-    return vnode.elm
-  }
-}
-
-/*  */
-
-var directives = {
-  create: updateDirectives,
-  update: updateDirectives,
-  destroy: function unbindDirectives (vnode) {
-    updateDirectives(vnode, emptyNode);
-  }
-};
-
-function updateDirectives (oldVnode, vnode) {
-  if (oldVnode.data.directives || vnode.data.directives) {
-    _update(oldVnode, vnode);
-  }
-}
-
-function _update (oldVnode, vnode) {
-  var isCreate = oldVnode === emptyNode;
-  var isDestroy = vnode === emptyNode;
-  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
-
-  var dirsWithInsert = [];
-  var dirsWithPostpatch = [];
-
-  var key, oldDir, dir;
-  for (key in newDirs) {
-    oldDir = oldDirs[key];
-    dir = newDirs[key];
-    if (!oldDir) {
-      // new directive, bind
-      callHook$1(dir, 'bind', vnode, oldVnode);
-      if (dir.def && dir.def.inserted) {
-        dirsWithInsert.push(dir);
-      }
-    } else {
-      // existing directive, update
-      dir.oldValue = oldDir.value;
-      callHook$1(dir, 'update', vnode, oldVnode);
-      if (dir.def && dir.def.componentUpdated) {
-        dirsWithPostpatch.push(dir);
-      }
-    }
-  }
-
-  if (dirsWithInsert.length) {
-    var callInsert = function () {
-      for (var i = 0; i < dirsWithInsert.length; i++) {
-        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
-      }
-    };
-    if (isCreate) {
-      mergeVNodeHook(vnode, 'insert', callInsert);
-    } else {
-      callInsert();
-    }
-  }
-
-  if (dirsWithPostpatch.length) {
-    mergeVNodeHook(vnode, 'postpatch', function () {
-      for (var i = 0; i < dirsWithPostpatch.length; i++) {
-        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
-      }
-    });
-  }
-
-  if (!isCreate) {
-    for (key in oldDirs) {
-      if (!newDirs[key]) {
-        // no longer present, unbind
-        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
-      }
-    }
-  }
-}
-
-var emptyModifiers = Object.create(null);
-
-function normalizeDirectives$1 (
-  dirs,
-  vm
-) {
-  var res = Object.create(null);
-  if (!dirs) {
-    // $flow-disable-line
-    return res
-  }
-  var i, dir;
-  for (i = 0; i < dirs.length; i++) {
-    dir = dirs[i];
-    if (!dir.modifiers) {
-      // $flow-disable-line
-      dir.modifiers = emptyModifiers;
-    }
-    res[getRawDirName(dir)] = dir;
-    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
-  }
-  // $flow-disable-line
-  return res
-}
-
-function getRawDirName (dir) {
-  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
-}
-
-function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
-  var fn = dir.def && dir.def[hook];
-  if (fn) {
-    try {
-      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
-    } catch (e) {
-      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
-    }
-  }
-}
-
-var baseModules = [
-  ref,
-  directives
-];
-
-/*  */
-
-function updateAttrs (oldVnode, vnode) {
-  var opts = vnode.componentOptions;
-  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-    return
-  }
-  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-    return
-  }
-  var key, cur, old;
-  var elm = vnode.elm;
-  var oldAttrs = oldVnode.data.attrs || {};
-  var attrs = vnode.data.attrs || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(attrs.__ob__)) {
-    attrs = vnode.data.attrs = extend({}, attrs);
-  }
-
-  for (key in attrs) {
-    cur = attrs[key];
-    old = oldAttrs[key];
-    if (old !== cur) {
-      setAttr(elm, key, cur);
-    }
-  }
-  // #4391: in IE9, setting type can reset value for input[type=radio]
-  // #6666: IE/Edge forces progress value down to 1 before setting a max
-  /* istanbul ignore if */
-  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
-    setAttr(elm, 'value', attrs.value);
-  }
-  for (key in oldAttrs) {
-    if (isUndef(attrs[key])) {
-      if (isXlink(key)) {
-        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
-      } else if (!isEnumeratedAttr(key)) {
-        elm.removeAttribute(key);
-      }
-    }
-  }
-}
-
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
-    // set attribute for blank value
-    // e.g. <option disabled>Select one</option>
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // technically allowfullscreen is a boolean attribute for <iframe>,
-      // but Flash expects a value of "true" when used on <embed> tag
-      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
-        ? 'true'
-        : key;
-      el.setAttribute(key, value);
-    }
-  } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
-  } else if (isXlink(key)) {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
-    } else {
-      el.setAttributeNS(xlinkNS, key, value);
-    }
-  } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        var blocker = function (e) {
-          e.stopImmediatePropagation();
-          el.removeEventListener('input', blocker);
-        };
-        el.addEventListener('input', blocker);
-        // $flow-disable-line
-        el.__ieph = true; /* IE placeholder patched */
-      }
-      el.setAttribute(key, value);
-    }
-  }
-}
-
-var attrs = {
-  create: updateAttrs,
-  update: updateAttrs
-};
-
-/*  */
-
-function updateClass (oldVnode, vnode) {
-  var el = vnode.elm;
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-  if (
-    isUndef(data.staticClass) &&
-    isUndef(data.class) && (
-      isUndef(oldData) || (
-        isUndef(oldData.staticClass) &&
-        isUndef(oldData.class)
-      )
-    )
-  ) {
-    return
-  }
-
-  var cls = genClassForVnode(vnode);
-
-  // handle transition classes
-  var transitionClass = el._transitionClasses;
-  if (isDef(transitionClass)) {
-    cls = concat(cls, stringifyClass(transitionClass));
-  }
-
-  // set the class
-  if (cls !== el._prevClass) {
-    el.setAttribute('class', cls);
-    el._prevClass = cls;
-  }
-}
-
-var klass = {
-  create: updateClass,
-  update: updateClass
-};
-
-/*  */
-
-var validDivisionCharRE = /[\w).+\-_$\]]/;
-
-function parseFilters (exp) {
-  var inSingle = false;
-  var inDouble = false;
-  var inTemplateString = false;
-  var inRegex = false;
-  var curly = 0;
-  var square = 0;
-  var paren = 0;
-  var lastFilterIndex = 0;
-  var c, prev, i, expression, filters;
-
-  for (i = 0; i < exp.length; i++) {
-    prev = c;
-    c = exp.charCodeAt(i);
-    if (inSingle) {
-      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
-    } else if (inDouble) {
-      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
-    } else if (inTemplateString) {
-      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
-    } else if (inRegex) {
-      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
-    } else if (
-      c === 0x7C && // pipe
-      exp.charCodeAt(i + 1) !== 0x7C &&
-      exp.charCodeAt(i - 1) !== 0x7C &&
-      !curly && !square && !paren
-    ) {
-      if (expression === undefined) {
-        // first filter, end of expression
-        lastFilterIndex = i + 1;
-        expression = exp.slice(0, i).trim();
-      } else {
-        pushFilter();
-      }
-    } else {
-      switch (c) {
-        case 0x22: inDouble = true; break         // "
-        case 0x27: inSingle = true; break         // '
-        case 0x60: inTemplateString = true; break // `
-        case 0x28: paren++; break                 // (
-        case 0x29: paren--; break                 // )
-        case 0x5B: square++; break                // [
-        case 0x5D: square--; break                // ]
-        case 0x7B: curly++; break                 // {
-        case 0x7D: curly--; break                 // }
-      }
-      if (c === 0x2f) { // /
-        var j = i - 1;
-        var p = (void 0);
-        // find first non-whitespace prev char
-        for (; j >= 0; j--) {
-          p = exp.charAt(j);
-          if (p !== ' ') { break }
-        }
-        if (!p || !validDivisionCharRE.test(p)) {
-          inRegex = true;
-        }
-      }
-    }
-  }
-
-  if (expression === undefined) {
-    expression = exp.slice(0, i).trim();
-  } else if (lastFilterIndex !== 0) {
-    pushFilter();
-  }
-
-  function pushFilter () {
-    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
-    lastFilterIndex = i + 1;
-  }
-
-  if (filters) {
-    for (i = 0; i < filters.length; i++) {
-      expression = wrapFilter(expression, filters[i]);
-    }
-  }
-
-  return expression
-}
-
-function wrapFilter (exp, filter) {
-  var i = filter.indexOf('(');
-  if (i < 0) {
-    // _f: resolveFilter
-    return ("_f(\"" + filter + "\")(" + exp + ")")
-  } else {
-    var name = filter.slice(0, i);
-    var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
-  }
-}
-
-/*  */
-
-function baseWarn (msg) {
-  console.error(("[Vue compiler]: " + msg));
-}
-
-function pluckModuleFunction (
-  modules,
-  key
-) {
-  return modules
-    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
-    : []
-}
-
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-// add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
-  el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
-}
-
-function addDirective (
-  el,
-  name,
-  rawName,
-  value,
-  arg,
-  modifiers
-) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
-  el.plain = false;
-}
-
-function addHandler (
-  el,
-  name,
-  value,
-  modifiers,
-  important,
-  warn
-) {
-  modifiers = modifiers || emptyObject;
-  // warn prevent and passive modifier
-  /* istanbul ignore if */
-  if (
-    process.env.NODE_ENV !== 'production' && warn &&
-    modifiers.prevent && modifiers.passive
-  ) {
-    warn(
-      'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
-    );
-  }
-
-  // check capture modifier
-  if (modifiers.capture) {
-    delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
-  }
-  if (modifiers.once) {
-    delete modifiers.once;
-    name = '~' + name; // mark the event as once
-  }
-  /* istanbul ignore if */
-  if (modifiers.passive) {
-    delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
-  }
-
-  var events;
-  if (modifiers.native) {
-    delete modifiers.native;
-    events = el.nativeEvents || (el.nativeEvents = {});
-  } else {
-    events = el.events || (el.events = {});
-  }
-
-  var newHandler = { value: value };
-  if (modifiers !== emptyObject) {
-    newHandler.modifiers = modifiers;
-  }
-
-  var handlers = events[name];
-  /* istanbul ignore if */
-  if (Array.isArray(handlers)) {
-    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
-  } else if (handlers) {
-    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
-  } else {
-    events[name] = newHandler;
-  }
-
-  el.plain = false;
-}
-
-function getBindingAttr (
-  el,
-  name,
-  getStatic
-) {
-  var dynamicValue =
-    getAndRemoveAttr(el, ':' + name) ||
-    getAndRemoveAttr(el, 'v-bind:' + name);
-  if (dynamicValue != null) {
-    return parseFilters(dynamicValue)
-  } else if (getStatic !== false) {
-    var staticValue = getAndRemoveAttr(el, name);
-    if (staticValue != null) {
-      return JSON.stringify(staticValue)
-    }
-  }
-}
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-function getAndRemoveAttr (
-  el,
-  name,
-  removeFromMap
-) {
-  var val;
-  if ((val = el.attrsMap[name]) != null) {
-    var list = el.attrsList;
-    for (var i = 0, l = list.length; i < l; i++) {
-      if (list[i].name === name) {
-        list.splice(i, 1);
-        break
-      }
-    }
-  }
-  if (removeFromMap) {
-    delete el.attrsMap[name];
-  }
-  return val
-}
-
-/*  */
-
-/**
- * Cross-platform code generation for component v-model
- */
-function genComponentModel (
-  el,
-  value,
-  modifiers
-) {
-  var ref = modifiers || {};
-  var number = ref.number;
-  var trim = ref.trim;
-
-  var baseValueExpression = '$$v';
-  var valueExpression = baseValueExpression;
-  if (trim) {
-    valueExpression =
-      "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
-  }
-  var assignment = genAssignmentCode(value, valueExpression);
-
-  el.model = {
-    value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
-    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
-  };
-}
-
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-function genAssignmentCode (
-  value,
-  assignment
-) {
-  var res = parseModel(value);
-  if (res.key === null) {
-    return (value + "=" + assignment)
-  } else {
-    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
-  }
-}
-
-/**
- * Parse a v-model expression into a base path and a final key segment.
- * Handles both dot-path and possible square brackets.
- *
- * Possible cases:
- *
- * - test
- * - test[key]
- * - test[test1[key]]
- * - test["a"][key]
- * - xxx.test[a[a].test1[key]]
- * - test.xxx.a["asa"][test1[key]]
- *
- */
-
-var len;
-var str;
-var chr;
-var index$1;
-var expressionPos;
-var expressionEndPos;
-
-
-
-function parseModel (val) {
-  len = val.length;
-
-  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
-    index$1 = val.lastIndexOf('.');
-    if (index$1 > -1) {
-      return {
-        exp: val.slice(0, index$1),
-        key: '"' + val.slice(index$1 + 1) + '"'
-      }
-    } else {
-      return {
-        exp: val,
-        key: null
-      }
-    }
-  }
-
-  str = val;
-  index$1 = expressionPos = expressionEndPos = 0;
-
-  while (!eof()) {
-    chr = next();
-    /* istanbul ignore if */
-    if (isStringStart(chr)) {
-      parseString(chr);
-    } else if (chr === 0x5B) {
-      parseBracket(chr);
-    }
-  }
-
-  return {
-    exp: val.slice(0, expressionPos),
-    key: val.slice(expressionPos + 1, expressionEndPos)
-  }
-}
-
-function next () {
-  return str.charCodeAt(++index$1)
-}
-
-function eof () {
-  return index$1 >= len
-}
-
-function isStringStart (chr) {
-  return chr === 0x22 || chr === 0x27
-}
-
-function parseBracket (chr) {
-  var inBracket = 1;
-  expressionPos = index$1;
-  while (!eof()) {
-    chr = next();
-    if (isStringStart(chr)) {
-      parseString(chr);
-      continue
-    }
-    if (chr === 0x5B) { inBracket++; }
-    if (chr === 0x5D) { inBracket--; }
-    if (inBracket === 0) {
-      expressionEndPos = index$1;
-      break
-    }
-  }
-}
-
-function parseString (chr) {
-  var stringQuote = chr;
-  while (!eof()) {
-    chr = next();
-    if (chr === stringQuote) {
-      break
-    }
-  }
-}
-
-/*  */
-
-var warn$1;
-
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
-var CHECKBOX_RADIO_TOKEN = '__c';
-
-function model (
-  el,
-  dir,
-  _warn
-) {
-  warn$1 = _warn;
-  var value = dir.value;
-  var modifiers = dir.modifiers;
-  var tag = el.tag;
-  var type = el.attrsMap.type;
-
-  if (process.env.NODE_ENV !== 'production') {
-    // inputs with type="file" are read only and setting the input's
-    // value will throw an error.
-    if (tag === 'input' && type === 'file') {
-      warn$1(
-        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
-      );
-    }
-  }
-
-  if (el.component) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else if (tag === 'select') {
-    genSelect(el, value, modifiers);
-  } else if (tag === 'input' && type === 'checkbox') {
-    genCheckboxModel(el, value, modifiers);
-  } else if (tag === 'input' && type === 'radio') {
-    genRadioModel(el, value, modifiers);
-  } else if (tag === 'input' || tag === 'textarea') {
-    genDefaultModel(el, value, modifiers);
-  } else if (!config.isReservedTag(tag)) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn$1(
-      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-      "v-model is not supported on this element type. " +
-      'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
-    );
-  }
-
-  // ensure runtime directive metadata
-  return true
-}
-
-function genCheckboxModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
-  addProp(el, 'checked',
-    "Array.isArray(" + value + ")" +
-    "?_i(" + value + "," + valueBinding + ")>-1" + (
-      trueValueBinding === 'true'
-        ? (":(" + value + ")")
-        : (":_q(" + value + "," + trueValueBinding + ")")
-    )
-  );
-  addHandler(el, 'change',
-    "var $$a=" + value + "," +
-        '$$el=$event.target,' +
-        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
-    'if(Array.isArray($$a)){' +
-      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
-          '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
-    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
-    null, true
-  );
-}
-
-function genRadioModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
-  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
-  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-}
-
-function genSelect (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var selectedVal = "Array.prototype.filter" +
-    ".call($event.target.options,function(o){return o.selected})" +
-    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
-    "return " + (number ? '_n(val)' : 'val') + "})";
-
-  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-  var code = "var $$selectedVal = " + selectedVal + ";";
-  code = code + " " + (genAssignmentCode(value, assignment));
-  addHandler(el, 'change', code, null, true);
-}
-
-function genDefaultModel (
-  el,
-  value,
-  modifiers
-) {
-  var type = el.attrsMap.type;
-
-  // warn if v-bind:value conflicts with v-model
-  if (process.env.NODE_ENV !== 'production') {
-    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
-      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
-      warn$1(
-        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
-      );
-    }
-  }
-
-  var ref = modifiers || {};
-  var lazy = ref.lazy;
-  var number = ref.number;
-  var trim = ref.trim;
-  var needCompositionGuard = !lazy && type !== 'range';
-  var event = lazy
-    ? 'change'
-    : type === 'range'
-      ? RANGE_TOKEN
-      : 'input';
-
-  var valueExpression = '$event.target.value';
-  if (trim) {
-    valueExpression = "$event.target.value.trim()";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
-  }
-
-  var code = genAssignmentCode(value, valueExpression);
-  if (needCompositionGuard) {
-    code = "if($event.target.composing)return;" + code;
-  }
-
-  addProp(el, 'value', ("(" + value + ")"));
-  addHandler(el, event, code, null, true);
-  if (trim || number) {
-    addHandler(el, 'blur', '$forceUpdate()');
-  }
-}
-
-/*  */
-
-// normalize v-model event tokens that can only be determined at runtime.
-// it's important to place the event as the first in the array because
-// the whole point is ensuring the v-model callback gets called before
-// user-attached handlers.
-function normalizeEvents (on) {
-  /* istanbul ignore if */
-  if (isDef(on[RANGE_TOKEN])) {
-    // IE input[type=range] only supports `change` event
-    var event = isIE ? 'change' : 'input';
-    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
-    delete on[RANGE_TOKEN];
-  }
-  // This was originally intended to fix #4521 but no longer necessary
-  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
-  /* istanbul ignore if */
-  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
-    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
-    delete on[CHECKBOX_RADIO_TOKEN];
-  }
-}
-
-var target$1;
-
-function createOnceHandler (handler, event, capture) {
-  var _target = target$1; // save current target element in closure
-  return function onceHandler () {
-    var res = handler.apply(null, arguments);
-    if (res !== null) {
-      remove$2(event, onceHandler, capture, _target);
-    }
-  }
-}
-
-function add$1 (
-  event,
-  handler,
-  once$$1,
-  capture,
-  passive
-) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
-  target$1.addEventListener(
-    event,
-    handler,
-    supportsPassive
-      ? { capture: capture, passive: passive }
-      : capture
-  );
-}
-
-function remove$2 (
-  event,
-  handler,
-  capture,
-  _target
-) {
-  (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
-    capture
-  );
-}
-
-function updateDOMListeners (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
-    return
-  }
-  var on = vnode.data.on || {};
-  var oldOn = oldVnode.data.on || {};
-  target$1 = vnode.elm;
-  normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
-  target$1 = undefined;
-}
-
-var events = {
-  create: updateDOMListeners,
-  update: updateDOMListeners
-};
-
-/*  */
-
-function updateDOMProps (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-    return
-  }
-  var key, cur;
-  var elm = vnode.elm;
-  var oldProps = oldVnode.data.domProps || {};
-  var props = vnode.data.domProps || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(props.__ob__)) {
-    props = vnode.data.domProps = extend({}, props);
-  }
-
-  for (key in oldProps) {
-    if (isUndef(props[key])) {
-      elm[key] = '';
-    }
-  }
-  for (key in props) {
-    cur = props[key];
-    // ignore children if the node has textContent or innerHTML,
-    // as these will throw away existing DOM nodes and cause removal errors
-    // on subsequent patches (#3360)
-    if (key === 'textContent' || key === 'innerHTML') {
-      if (vnode.children) { vnode.children.length = 0; }
-      if (cur === oldProps[key]) { continue }
-      // #6601 work around Chrome version <= 55 bug where single textNode
-      // replaced by innerHTML/textContent retains its parentNode property
-      if (elm.childNodes.length === 1) {
-        elm.removeChild(elm.childNodes[0]);
-      }
-    }
-
-    if (key === 'value') {
-      // store value as _value as well since
-      // non-string values will be stringified
-      elm._value = cur;
-      // avoid resetting cursor position when value is the same
-      var strCur = isUndef(cur) ? '' : String(cur);
-      if (shouldUpdateValue(elm, strCur)) {
-        elm.value = strCur;
-      }
-    } else {
-      elm[key] = cur;
-    }
-  }
-}
-
-// check platforms/web/util/attrs.js acceptValue
-
-
-function shouldUpdateValue (elm, checkVal) {
-  return (!elm.composing && (
-    elm.tagName === 'OPTION' ||
-    isNotInFocusAndDirty(elm, checkVal) ||
-    isDirtyWithModifiers(elm, checkVal)
-  ))
-}
-
-function isNotInFocusAndDirty (elm, checkVal) {
-  // return true when textbox (.number and .trim) loses focus and its value is
-  // not equal to the updated value
-  var notInFocus = true;
-  // #6157
-  // work around IE bug when accessing document.activeElement in an iframe
-  try { notInFocus = document.activeElement !== elm; } catch (e) {}
-  return notInFocus && elm.value !== checkVal
-}
-
-function isDirtyWithModifiers (elm, newVal) {
-  var value = elm.value;
-  var modifiers = elm._vModifiers; // injected by v-model runtime
-  if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
-    if (modifiers.number) {
-      return toNumber(value) !== toNumber(newVal)
-    }
-    if (modifiers.trim) {
-      return value.trim() !== newVal.trim()
-    }
-  }
-  return value !== newVal
-}
-
-var domProps = {
-  create: updateDOMProps,
-  update: updateDOMProps
-};
-
-/*  */
-
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
-    }
-  });
-  return res
-});
-
-// merge static and dynamic style data on the same vnode
-function normalizeStyleData (data) {
-  var style = normalizeStyleBinding(data.style);
-  // static style is pre-processed into an object during compilation
-  // and is always a fresh object, so it's safe to merge into it
-  return data.staticStyle
-    ? extend(data.staticStyle, style)
-    : style
-}
-
-// normalize possible array / string values into Object
-function normalizeStyleBinding (bindingStyle) {
-  if (Array.isArray(bindingStyle)) {
-    return toObject(bindingStyle)
-  }
-  if (typeof bindingStyle === 'string') {
-    return parseStyleText(bindingStyle)
-  }
-  return bindingStyle
-}
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-function getStyle (vnode, checkChild) {
-  var res = {};
-  var styleData;
-
-  if (checkChild) {
-    var childNode = vnode;
-    while (childNode.componentInstance) {
-      childNode = childNode.componentInstance._vnode;
-      if (
-        childNode && childNode.data &&
-        (styleData = normalizeStyleData(childNode.data))
-      ) {
-        extend(res, styleData);
-      }
-    }
-  }
-
-  if ((styleData = normalizeStyleData(vnode.data))) {
-    extend(res, styleData);
-  }
-
-  var parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
-    }
-  }
-  return res
-}
-
-/*  */
-
-var cssVarRE = /^--/;
-var importantRE = /\s*!important$/;
-var setProp = function (el, name, val) {
-  /* istanbul ignore if */
-  if (cssVarRE.test(name)) {
-    el.style.setProperty(name, val);
-  } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
-  } else {
-    var normalizedName = normalize(name);
-    if (Array.isArray(val)) {
-      // Support values array created by autoprefixer, e.g.
-      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
-      // Set them one by one, and the browser will only set those it can recognize
-      for (var i = 0, len = val.length; i < len; i++) {
-        el.style[normalizedName] = val[i];
-      }
-    } else {
-      el.style[normalizedName] = val;
-    }
-  }
-};
-
-var vendorNames = ['Webkit', 'Moz', 'ms'];
-
-var emptyStyle;
-var normalize = cached(function (prop) {
-  emptyStyle = emptyStyle || document.createElement('div').style;
-  prop = camelize(prop);
-  if (prop !== 'filter' && (prop in emptyStyle)) {
-    return prop
-  }
-  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-  for (var i = 0; i < vendorNames.length; i++) {
-    var name = vendorNames[i] + capName;
-    if (name in emptyStyle) {
-      return name
-    }
-  }
-});
-
-function updateStyle (oldVnode, vnode) {
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-
-  if (isUndef(data.staticStyle) && isUndef(data.style) &&
-    isUndef(oldData.staticStyle) && isUndef(oldData.style)
-  ) {
-    return
-  }
-
-  var cur, name;
-  var el = vnode.elm;
-  var oldStaticStyle = oldData.staticStyle;
-  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-  var oldStyle = oldStaticStyle || oldStyleBinding;
-
-  var style = normalizeStyleBinding(vnode.data.style) || {};
-
-  // store normalized style under a different key for next diff
-  // make sure to clone it if it's reactive, since the user likely wants
-  // to mutate it.
-  vnode.data.normalizedStyle = isDef(style.__ob__)
-    ? extend({}, style)
-    : style;
-
-  var newStyle = getStyle(vnode, true);
-
-  for (name in oldStyle) {
-    if (isUndef(newStyle[name])) {
-      setProp(el, name, '');
-    }
-  }
-  for (name in newStyle) {
-    cur = newStyle[name];
-    if (cur !== oldStyle[name]) {
-      // ie9 setting to null has no effect, must use empty string
-      setProp(el, name, cur == null ? '' : cur);
-    }
-  }
-}
-
-var style = {
-  create: updateStyle,
-  update: updateStyle
-};
-
-/*  */
-
-/**
- * Add class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function addClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
-
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
-    } else {
-      el.classList.add(cls);
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    if (cur.indexOf(' ' + cls + ' ') < 0) {
-      el.setAttribute('class', (cur + cls).trim());
-    }
-  }
-}
-
-/**
- * Remove class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function removeClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
-
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
-    } else {
-      el.classList.remove(cls);
-    }
-    if (!el.classList.length) {
-      el.removeAttribute('class');
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    var tar = ' ' + cls + ' ';
-    while (cur.indexOf(tar) >= 0) {
-      cur = cur.replace(tar, ' ');
-    }
-    cur = cur.trim();
-    if (cur) {
-      el.setAttribute('class', cur);
-    } else {
-      el.removeAttribute('class');
-    }
-  }
-}
-
-/*  */
-
-function resolveTransition (def) {
-  if (!def) {
-    return
-  }
-  /* istanbul ignore else */
-  if (typeof def === 'object') {
-    var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
-    }
-    extend(res, def);
-    return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
-  }
-}
-
-var autoCssTransition = cached(function (name) {
-  return {
-    enterClass: (name + "-enter"),
-    enterToClass: (name + "-enter-to"),
-    enterActiveClass: (name + "-enter-active"),
-    leaveClass: (name + "-leave"),
-    leaveToClass: (name + "-leave-to"),
-    leaveActiveClass: (name + "-leave-active")
-  }
-});
-
-var hasTransition = inBrowser && !isIE9;
-var TRANSITION = 'transition';
-var ANIMATION = 'animation';
-
-// Transition property/event sniffing
-var transitionProp = 'transition';
-var transitionEndEvent = 'transitionend';
-var animationProp = 'animation';
-var animationEndEvent = 'animationend';
-if (hasTransition) {
-  /* istanbul ignore if */
-  if (window.ontransitionend === undefined &&
-    window.onwebkittransitionend !== undefined
-  ) {
-    transitionProp = 'WebkitTransition';
-    transitionEndEvent = 'webkitTransitionEnd';
-  }
-  if (window.onanimationend === undefined &&
-    window.onwebkitanimationend !== undefined
-  ) {
-    animationProp = 'WebkitAnimation';
-    animationEndEvent = 'webkitAnimationEnd';
-  }
-}
-
-// binding to window is necessary to make hot reload work in IE in strict mode
-var raf = inBrowser
-  ? window.requestAnimationFrame
-    ? window.requestAnimationFrame.bind(window)
-    : setTimeout
-  : /* istanbul ignore next */ function (fn) { return fn(); };
-
-function nextFrame (fn) {
-  raf(function () {
-    raf(fn);
-  });
-}
-
-function addTransitionClass (el, cls) {
-  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
-  if (transitionClasses.indexOf(cls) < 0) {
-    transitionClasses.push(cls);
-    addClass(el, cls);
-  }
-}
-
-function removeTransitionClass (el, cls) {
-  if (el._transitionClasses) {
-    remove(el._transitionClasses, cls);
-  }
-  removeClass(el, cls);
-}
-
-function whenTransitionEnds (
-  el,
-  expectedType,
-  cb
-) {
-  var ref = getTransitionInfo(el, expectedType);
-  var type = ref.type;
-  var timeout = ref.timeout;
-  var propCount = ref.propCount;
-  if (!type) { return cb() }
-  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-  var ended = 0;
-  var end = function () {
-    el.removeEventListener(event, onEnd);
-    cb();
-  };
-  var onEnd = function (e) {
-    if (e.target === el) {
-      if (++ended >= propCount) {
-        end();
-      }
-    }
-  };
-  setTimeout(function () {
-    if (ended < propCount) {
-      end();
-    }
-  }, timeout + 1);
-  el.addEventListener(event, onEnd);
-}
-
-var transformRE = /\b(transform|all)(,|$)/;
-
-function getTransitionInfo (el, expectedType) {
-  var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
-  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
-  var animationTimeout = getTimeout(animationDelays, animationDurations);
-
-  var type;
-  var timeout = 0;
-  var propCount = 0;
-  /* istanbul ignore if */
-  if (expectedType === TRANSITION) {
-    if (transitionTimeout > 0) {
-      type = TRANSITION;
-      timeout = transitionTimeout;
-      propCount = transitionDurations.length;
-    }
-  } else if (expectedType === ANIMATION) {
-    if (animationTimeout > 0) {
-      type = ANIMATION;
-      timeout = animationTimeout;
-      propCount = animationDurations.length;
-    }
-  } else {
-    timeout = Math.max(transitionTimeout, animationTimeout);
-    type = timeout > 0
-      ? transitionTimeout > animationTimeout
-        ? TRANSITION
-        : ANIMATION
-      : null;
-    propCount = type
-      ? type === TRANSITION
-        ? transitionDurations.length
-        : animationDurations.length
-      : 0;
-  }
-  var hasTransform =
-    type === TRANSITION &&
-    transformRE.test(styles[transitionProp + 'Property']);
-  return {
-    type: type,
-    timeout: timeout,
-    propCount: propCount,
-    hasTransform: hasTransform
-  }
-}
-
-function getTimeout (delays, durations) {
-  /* istanbul ignore next */
-  while (delays.length < durations.length) {
-    delays = delays.concat(delays);
-  }
-
-  return Math.max.apply(null, durations.map(function (d, i) {
-    return toMs(d) + toMs(delays[i])
-  }))
-}
-
-function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
-}
-
-/*  */
-
-function enter (vnode, toggleDisplay) {
-  var el = vnode.elm;
-
-  // call leave callback now
-  if (isDef(el._leaveCb)) {
-    el._leaveCb.cancelled = true;
-    el._leaveCb();
-  }
-
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data)) {
-    return
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._enterCb) || el.nodeType !== 1) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var enterClass = data.enterClass;
-  var enterToClass = data.enterToClass;
-  var enterActiveClass = data.enterActiveClass;
-  var appearClass = data.appearClass;
-  var appearToClass = data.appearToClass;
-  var appearActiveClass = data.appearActiveClass;
-  var beforeEnter = data.beforeEnter;
-  var enter = data.enter;
-  var afterEnter = data.afterEnter;
-  var enterCancelled = data.enterCancelled;
-  var beforeAppear = data.beforeAppear;
-  var appear = data.appear;
-  var afterAppear = data.afterAppear;
-  var appearCancelled = data.appearCancelled;
-  var duration = data.duration;
-
-  // activeInstance will always be the <transition> component managing this
-  // transition. One edge case to check is when the <transition> is placed
-  // as the root node of a child component. In that case we need to check
-  // <transition>'s parent for appear check.
-  var context = activeInstance;
-  var transitionNode = activeInstance.$vnode;
-  while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
-    context = transitionNode.context;
-  }
-
-  var isAppear = !context._isMounted || !vnode.isRootInsert;
-
-  if (isAppear && !appear && appear !== '') {
-    return
-  }
-
-  var startClass = isAppear && appearClass
-    ? appearClass
-    : enterClass;
-  var activeClass = isAppear && appearActiveClass
-    ? appearActiveClass
-    : enterActiveClass;
-  var toClass = isAppear && appearToClass
-    ? appearToClass
-    : enterToClass;
-
-  var beforeEnterHook = isAppear
-    ? (beforeAppear || beforeEnter)
-    : beforeEnter;
-  var enterHook = isAppear
-    ? (typeof appear === 'function' ? appear : enter)
-    : enter;
-  var afterEnterHook = isAppear
-    ? (afterAppear || afterEnter)
-    : afterEnter;
-  var enterCancelledHook = isAppear
-    ? (appearCancelled || enterCancelled)
-    : enterCancelled;
-
-  var explicitEnterDuration = toNumber(
-    isObject(duration)
-      ? duration.enter
-      : duration
-  );
-
-  if (process.env.NODE_ENV !== 'production' && explicitEnterDuration != null) {
-    checkDuration(explicitEnterDuration, 'enter', vnode);
-  }
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(enterHook);
-
-  var cb = el._enterCb = once(function () {
-    if (expectsCSS) {
-      removeTransitionClass(el, toClass);
-      removeTransitionClass(el, activeClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, startClass);
-      }
-      enterCancelledHook && enterCancelledHook(el);
-    } else {
-      afterEnterHook && afterEnterHook(el);
-    }
-    el._enterCb = null;
-  });
-
-  if (!vnode.data.show) {
-    // remove pending leave element on enter by injecting an insert hook
-    mergeVNodeHook(vnode, 'insert', function () {
-      var parent = el.parentNode;
-      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
-      if (pendingNode &&
-        pendingNode.tag === vnode.tag &&
-        pendingNode.elm._leaveCb
-      ) {
-        pendingNode.elm._leaveCb();
-      }
-      enterHook && enterHook(el, cb);
-    });
-  }
-
-  // start enter transition
-  beforeEnterHook && beforeEnterHook(el);
-  if (expectsCSS) {
-    addTransitionClass(el, startClass);
-    addTransitionClass(el, activeClass);
-    nextFrame(function () {
-      addTransitionClass(el, toClass);
-      removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
-        }
-      }
-    });
-  }
-
-  if (vnode.data.show) {
-    toggleDisplay && toggleDisplay();
-    enterHook && enterHook(el, cb);
-  }
-
-  if (!expectsCSS && !userWantsControl) {
-    cb();
-  }
-}
-
-function leave (vnode, rm) {
-  var el = vnode.elm;
-
-  // call enter callback now
-  if (isDef(el._enterCb)) {
-    el._enterCb.cancelled = true;
-    el._enterCb();
-  }
-
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data) || el.nodeType !== 1) {
-    return rm()
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._leaveCb)) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var leaveClass = data.leaveClass;
-  var leaveToClass = data.leaveToClass;
-  var leaveActiveClass = data.leaveActiveClass;
-  var beforeLeave = data.beforeLeave;
-  var leave = data.leave;
-  var afterLeave = data.afterLeave;
-  var leaveCancelled = data.leaveCancelled;
-  var delayLeave = data.delayLeave;
-  var duration = data.duration;
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(leave);
-
-  var explicitLeaveDuration = toNumber(
-    isObject(duration)
-      ? duration.leave
-      : duration
-  );
-
-  if (process.env.NODE_ENV !== 'production' && isDef(explicitLeaveDuration)) {
-    checkDuration(explicitLeaveDuration, 'leave', vnode);
-  }
-
-  var cb = el._leaveCb = once(function () {
-    if (el.parentNode && el.parentNode._pending) {
-      el.parentNode._pending[vnode.key] = null;
-    }
-    if (expectsCSS) {
-      removeTransitionClass(el, leaveToClass);
-      removeTransitionClass(el, leaveActiveClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, leaveClass);
-      }
-      leaveCancelled && leaveCancelled(el);
-    } else {
-      rm();
-      afterLeave && afterLeave(el);
-    }
-    el._leaveCb = null;
-  });
-
-  if (delayLeave) {
-    delayLeave(performLeave);
-  } else {
-    performLeave();
-  }
-
-  function performLeave () {
-    // the delayed leave may have already been cancelled
-    if (cb.cancelled) {
-      return
-    }
-    // record leaving element
-    if (!vnode.data.show) {
-      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
-    }
-    beforeLeave && beforeLeave(el);
-    if (expectsCSS) {
-      addTransitionClass(el, leaveClass);
-      addTransitionClass(el, leaveActiveClass);
-      nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
-        removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
-          }
-        }
-      });
-    }
-    leave && leave(el, cb);
-    if (!expectsCSS && !userWantsControl) {
-      cb();
-    }
-  }
-}
-
-// only used in dev mode
-function checkDuration (val, name, vnode) {
-  if (typeof val !== 'number') {
-    warn(
-      "<transition> explicit " + name + " duration is not a valid number - " +
-      "got " + (JSON.stringify(val)) + ".",
-      vnode.context
-    );
-  } else if (isNaN(val)) {
-    warn(
-      "<transition> explicit " + name + " duration is NaN - " +
-      'the duration expression might be incorrect.',
-      vnode.context
-    );
-  }
-}
-
-function isValidDuration (val) {
-  return typeof val === 'number' && !isNaN(val)
-}
-
-/**
- * Normalize a transition hook's argument length. The hook may be:
- * - a merged hook (invoker) with the original in .fns
- * - a wrapped component method (check ._length)
- * - a plain function (.length)
- */
-function getHookArgumentsLength (fn) {
-  if (isUndef(fn)) {
-    return false
-  }
-  var invokerFns = fn.fns;
-  if (isDef(invokerFns)) {
-    // invoker
-    return getHookArgumentsLength(
-      Array.isArray(invokerFns)
-        ? invokerFns[0]
-        : invokerFns
-    )
-  } else {
-    return (fn._length || fn.length) > 1
-  }
-}
-
-function _enter (_, vnode) {
-  if (vnode.data.show !== true) {
-    enter(vnode);
-  }
-}
-
-var transition = inBrowser ? {
-  create: _enter,
-  activate: _enter,
-  remove: function remove$$1 (vnode, rm) {
-    /* istanbul ignore else */
-    if (vnode.data.show !== true) {
-      leave(vnode, rm);
-    } else {
-      rm();
-    }
-  }
-} : {};
-
-var platformModules = [
-  attrs,
-  klass,
-  events,
-  domProps,
-  style,
-  transition
-];
-
-/*  */
-
-// the directive module should be applied last, after all
-// built-in modules have been applied.
-var modules = platformModules.concat(baseModules);
-
-var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
-
-/**
- * Not type checking this file because flow doesn't like attaching
- * properties to Elements.
- */
-
-/* istanbul ignore if */
-if (isIE9) {
-  // http://www.matts411.com/post/internet-explorer-9-oninput/
-  document.addEventListener('selectionchange', function () {
-    var el = document.activeElement;
-    if (el && el.vmodel) {
-      trigger(el, 'input');
-    }
-  });
-}
-
-var directive = {
-  inserted: function inserted (el, binding, vnode, oldVnode) {
-    if (vnode.tag === 'select') {
-      // #6903
-      if (oldVnode.elm && !oldVnode.elm._vOptions) {
-        mergeVNodeHook(vnode, 'postpatch', function () {
-          directive.componentUpdated(el, binding, vnode);
-        });
-      } else {
-        setSelected(el, binding, vnode.context);
-      }
-      el._vOptions = [].map.call(el.options, getValue);
-    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
-      el._vModifiers = binding.modifiers;
-      if (!binding.modifiers.lazy) {
-        // Safari < 10.2 & UIWebView doesn't fire compositionend when
-        // switching focus before confirming composition choice
-        // this also fixes the issue where some browsers e.g. iOS Chrome
-        // fires "change" instead of "input" on autocomplete.
-        el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
-        /* istanbul ignore if */
-        if (isIE9) {
-          el.vmodel = true;
-        }
-      }
-    }
-  },
-
-  componentUpdated: function componentUpdated (el, binding, vnode) {
-    if (vnode.tag === 'select') {
-      setSelected(el, binding, vnode.context);
-      // in case the options rendered by v-for have changed,
-      // it's possible that the value is out-of-sync with the rendered options.
-      // detect such cases and filter out values that no longer has a matching
-      // option in the DOM.
-      var prevOptions = el._vOptions;
-      var curOptions = el._vOptions = [].map.call(el.options, getValue);
-      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
-        // trigger change event if
-        // no matching option found for at least one value
-        var needReset = el.multiple
-          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
-          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
-        if (needReset) {
-          trigger(el, 'change');
-        }
-      }
-    }
-  }
-};
-
-function setSelected (el, binding, vm) {
-  actuallySetSelected(el, binding, vm);
-  /* istanbul ignore if */
-  if (isIE || isEdge) {
-    setTimeout(function () {
-      actuallySetSelected(el, binding, vm);
-    }, 0);
-  }
-}
-
-function actuallySetSelected (el, binding, vm) {
-  var value = binding.value;
-  var isMultiple = el.multiple;
-  if (isMultiple && !Array.isArray(value)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
-      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
-      vm
-    );
-    return
-  }
-  var selected, option;
-  for (var i = 0, l = el.options.length; i < l; i++) {
-    option = el.options[i];
-    if (isMultiple) {
-      selected = looseIndexOf(value, getValue(option)) > -1;
-      if (option.selected !== selected) {
-        option.selected = selected;
-      }
-    } else {
-      if (looseEqual(getValue(option), value)) {
-        if (el.selectedIndex !== i) {
-          el.selectedIndex = i;
-        }
-        return
-      }
-    }
-  }
-  if (!isMultiple) {
-    el.selectedIndex = -1;
-  }
-}
-
-function hasNoMatchingOption (value, options) {
-  return options.every(function (o) { return !looseEqual(o, value); })
-}
-
-function getValue (option) {
-  return '_value' in option
-    ? option._value
-    : option.value
-}
-
-function onCompositionStart (e) {
-  e.target.composing = true;
-}
-
-function onCompositionEnd (e) {
-  // prevent triggering an input event for no reason
-  if (!e.target.composing) { return }
-  e.target.composing = false;
-  trigger(e.target, 'input');
-}
-
-function trigger (el, type) {
-  var e = document.createEvent('HTMLEvents');
-  e.initEvent(type, true, true);
-  el.dispatchEvent(e);
-}
-
-/*  */
-
-// recursively search for possible transition defined inside the component root
-function locateNode (vnode) {
-  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
-    ? locateNode(vnode.componentInstance._vnode)
-    : vnode
-}
-
-var show = {
-  bind: function bind (el, ref, vnode) {
-    var value = ref.value;
-
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    var originalDisplay = el.__vOriginalDisplay =
-      el.style.display === 'none' ? '' : el.style.display;
-    if (value && transition$$1) {
-      vnode.data.show = true;
-      enter(vnode, function () {
-        el.style.display = originalDisplay;
-      });
-    } else {
-      el.style.display = value ? originalDisplay : 'none';
-    }
-  },
-
-  update: function update (el, ref, vnode) {
-    var value = ref.value;
-    var oldValue = ref.oldValue;
-
-    /* istanbul ignore if */
-    if (value === oldValue) { return }
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    if (transition$$1) {
-      vnode.data.show = true;
-      if (value) {
-        enter(vnode, function () {
-          el.style.display = el.__vOriginalDisplay;
-        });
-      } else {
-        leave(vnode, function () {
-          el.style.display = 'none';
-        });
-      }
-    } else {
-      el.style.display = value ? el.__vOriginalDisplay : 'none';
-    }
-  },
-
-  unbind: function unbind (
-    el,
-    binding,
-    vnode,
-    oldVnode,
-    isDestroy
-  ) {
-    if (!isDestroy) {
-      el.style.display = el.__vOriginalDisplay;
-    }
-  }
-};
-
-var platformDirectives = {
-  model: directive,
-  show: show
-};
-
-/*  */
-
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
-var transitionProps = {
-  name: String,
-  appear: Boolean,
-  css: Boolean,
-  mode: String,
-  type: String,
-  enterClass: String,
-  leaveClass: String,
-  enterToClass: String,
-  leaveToClass: String,
-  enterActiveClass: String,
-  leaveActiveClass: String,
-  appearClass: String,
-  appearActiveClass: String,
-  appearToClass: String,
-  duration: [Number, String, Object]
-};
-
-// in case the child is also an abstract component, e.g. <keep-alive>
-// we want to recursively retrieve the real component to be rendered
-function getRealChild (vnode) {
-  var compOptions = vnode && vnode.componentOptions;
-  if (compOptions && compOptions.Ctor.options.abstract) {
-    return getRealChild(getFirstComponentChild(compOptions.children))
-  } else {
-    return vnode
-  }
-}
-
-function extractTransitionData (comp) {
-  var data = {};
-  var options = comp.$options;
-  // props
-  for (var key in options.propsData) {
-    data[key] = comp[key];
-  }
-  // events.
-  // extract listeners and pass them directly to the transition methods
-  var listeners = options._parentListeners;
-  for (var key$1 in listeners) {
-    data[camelize(key$1)] = listeners[key$1];
-  }
-  return data
-}
-
-function placeholder (h, rawChild) {
-  if (/\d-keep-alive$/.test(rawChild.tag)) {
-    return h('keep-alive', {
-      props: rawChild.componentOptions.propsData
-    })
-  }
-}
-
-function hasParentTransition (vnode) {
-  while ((vnode = vnode.parent)) {
-    if (vnode.data.transition) {
-      return true
-    }
-  }
-}
-
-function isSameChild (child, oldChild) {
-  return oldChild.key === child.key && oldChild.tag === child.tag
-}
-
-var Transition = {
-  name: 'transition',
-  props: transitionProps,
-  abstract: true,
-
-  render: function render (h) {
-    var this$1 = this;
-
-    var children = this.$slots.default;
-    if (!children) {
-      return
-    }
-
-    // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
-    /* istanbul ignore if */
-    if (!children.length) {
-      return
-    }
-
-    // warn multiple elements
-    if (process.env.NODE_ENV !== 'production' && children.length > 1) {
-      warn(
-        '<transition> can only be used on a single element. Use ' +
-        '<transition-group> for lists.',
-        this.$parent
-      );
-    }
-
-    var mode = this.mode;
-
-    // warn invalid mode
-    if (process.env.NODE_ENV !== 'production' &&
-      mode && mode !== 'in-out' && mode !== 'out-in'
-    ) {
-      warn(
-        'invalid <transition> mode: ' + mode,
-        this.$parent
-      );
-    }
-
-    var rawChild = children[0];
-
-    // if this is a component root node and the component's
-    // parent container node also has transition, skip.
-    if (hasParentTransition(this.$vnode)) {
-      return rawChild
-    }
-
-    // apply transition data to child
-    // use getRealChild() to ignore abstract components e.g. keep-alive
-    var child = getRealChild(rawChild);
-    /* istanbul ignore if */
-    if (!child) {
-      return rawChild
-    }
-
-    if (this._leaving) {
-      return placeholder(h, rawChild)
-    }
-
-    // ensure a key that is unique to the vnode type and to this transition
-    // component instance. This key will be used to remove pending leaving nodes
-    // during entering.
-    var id = "__transition-" + (this._uid) + "-";
-    child.key = child.key == null
-      ? child.isComment
-        ? id + 'comment'
-        : id + child.tag
-      : isPrimitive(child.key)
-        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-        : child.key;
-
-    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-    var oldRawChild = this._vnode;
-    var oldChild = getRealChild(oldRawChild);
-
-    // mark v-show
-    // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
-      child.data.show = true;
-    }
-
-    if (
-      oldChild &&
-      oldChild.data &&
-      !isSameChild(child, oldChild) &&
-      !isAsyncPlaceholder(oldChild) &&
-      // #6687 component root is a comment node
-      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
-    ) {
-      // replace old child transition data with fresh one
-      // important for dynamic transitions!
-      var oldData = oldChild.data.transition = extend({}, data);
-      // handle transition mode
-      if (mode === 'out-in') {
-        // return placeholder node and queue update when leave finishes
-        this._leaving = true;
-        mergeVNodeHook(oldData, 'afterLeave', function () {
-          this$1._leaving = false;
-          this$1.$forceUpdate();
-        });
-        return placeholder(h, rawChild)
-      } else if (mode === 'in-out') {
-        if (isAsyncPlaceholder(child)) {
-          return oldRawChild
-        }
-        var delayedLeave;
-        var performLeave = function () { delayedLeave(); };
-        mergeVNodeHook(data, 'afterEnter', performLeave);
-        mergeVNodeHook(data, 'enterCancelled', performLeave);
-        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
-      }
-    }
-
-    return rawChild
-  }
-};
-
-/*  */
-
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
-
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
-
-var props = extend({
-  tag: String,
-  moveClass: String
-}, transitionProps);
-
-delete props.mode;
-
-var TransitionGroup = {
-  props: props,
-
-  render: function render (h) {
-    var tag = this.tag || this.$vnode.data.tag || 'span';
-    var map = Object.create(null);
-    var prevChildren = this.prevChildren = this.children;
-    var rawChildren = this.$slots.default || [];
-    var children = this.children = [];
-    var transitionData = extractTransitionData(this);
-
-    for (var i = 0; i < rawChildren.length; i++) {
-      var c = rawChildren[i];
-      if (c.tag) {
-        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
-          children.push(c);
-          map[c.key] = c
-          ;(c.data || (c.data = {})).transition = transitionData;
-        } else if (process.env.NODE_ENV !== 'production') {
-          var opts = c.componentOptions;
-          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-          warn(("<transition-group> children must be keyed: <" + name + ">"));
-        }
-      }
-    }
-
-    if (prevChildren) {
-      var kept = [];
-      var removed = [];
-      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
-        var c$1 = prevChildren[i$1];
-        c$1.data.transition = transitionData;
-        c$1.data.pos = c$1.elm.getBoundingClientRect();
-        if (map[c$1.key]) {
-          kept.push(c$1);
-        } else {
-          removed.push(c$1);
-        }
-      }
-      this.kept = h(tag, null, kept);
-      this.removed = removed;
-    }
-
-    return h(tag, null, children)
-  },
-
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
-
-  updated: function updated () {
-    var children = this.prevChildren;
-    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
-    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
-      return
-    }
-
-    // we divide the work into three loops to avoid mixing DOM reads and writes
-    // in each iteration - which helps prevent layout thrashing.
-    children.forEach(callPendingCbs);
-    children.forEach(recordPosition);
-    children.forEach(applyTranslation);
-
-    // force reflow to put everything in position
-    // assign to this to avoid being removed in tree-shaking
-    // $flow-disable-line
-    this._reflow = document.body.offsetHeight;
-
-    children.forEach(function (c) {
-      if (c.data.moved) {
-        var el = c.elm;
-        var s = el.style;
-        addTransitionClass(el, moveClass);
-        s.transform = s.WebkitTransform = s.transitionDuration = '';
-        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
-          if (!e || /transform$/.test(e.propertyName)) {
-            el.removeEventListener(transitionEndEvent, cb);
-            el._moveCb = null;
-            removeTransitionClass(el, moveClass);
-          }
-        });
-      }
-    });
-  },
-
-  methods: {
-    hasMove: function hasMove (el, moveClass) {
-      /* istanbul ignore if */
-      if (!hasTransition) {
-        return false
-      }
-      /* istanbul ignore if */
-      if (this._hasMove) {
-        return this._hasMove
-      }
-      // Detect whether an element with the move class applied has
-      // CSS transitions. Since the element may be inside an entering
-      // transition at this very moment, we make a clone of it and remove
-      // all other transition classes applied to ensure only the move class
-      // is applied.
-      var clone = el.cloneNode();
-      if (el._transitionClasses) {
-        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
-      }
-      addClass(clone, moveClass);
-      clone.style.display = 'none';
-      this.$el.appendChild(clone);
-      var info = getTransitionInfo(clone);
-      this.$el.removeChild(clone);
-      return (this._hasMove = info.hasTransform)
-    }
-  }
-};
-
-function callPendingCbs (c) {
-  /* istanbul ignore if */
-  if (c.elm._moveCb) {
-    c.elm._moveCb();
-  }
-  /* istanbul ignore if */
-  if (c.elm._enterCb) {
-    c.elm._enterCb();
-  }
-}
-
-function recordPosition (c) {
-  c.data.newPos = c.elm.getBoundingClientRect();
-}
-
-function applyTranslation (c) {
-  var oldPos = c.data.pos;
-  var newPos = c.data.newPos;
-  var dx = oldPos.left - newPos.left;
-  var dy = oldPos.top - newPos.top;
-  if (dx || dy) {
-    c.data.moved = true;
-    var s = c.elm.style;
-    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
-    s.transitionDuration = '0s';
-  }
-}
-
-var platformComponents = {
-  Transition: Transition,
-  TransitionGroup: TransitionGroup
-};
-
-/*  */
-
-// install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
-
-// install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
-
-// install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
-
-// public mount method
-Vue$3.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && inBrowser ? query(el) : undefined;
-  return mountComponent(this, el, hydrating)
-};
-
-// devtools global hook
-/* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if (process.env.NODE_ENV !== 'production' && isChrome) {
-      console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
-      );
-    }
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
-  }
-}, 0);
-
-/*  */
-
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
-var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
-
-var buildRegex = cached(function (delimiters) {
-  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
-  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
-  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-});
-
-
-
-function parseText (
-  text,
-  delimiters
-) {
-  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-  if (!tagRE.test(text)) {
-    return
-  }
-  var tokens = [];
-  var rawTokens = [];
-  var lastIndex = tagRE.lastIndex = 0;
-  var match, index, tokenValue;
-  while ((match = tagRE.exec(text))) {
-    index = match.index;
-    // push text token
-    if (index > lastIndex) {
-      rawTokens.push(tokenValue = text.slice(lastIndex, index));
-      tokens.push(JSON.stringify(tokenValue));
-    }
-    // tag token
-    var exp = parseFilters(match[1].trim());
-    tokens.push(("_s(" + exp + ")"));
-    rawTokens.push({ '@binding': exp });
-    lastIndex = index + match[0].length;
-  }
-  if (lastIndex < text.length) {
-    rawTokens.push(tokenValue = text.slice(lastIndex));
-    tokens.push(JSON.stringify(tokenValue));
-  }
-  return {
-    expression: tokens.join('+'),
-    tokens: rawTokens
-  }
-}
-
-/*  */
-
-function transformNode (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticClass = getAndRemoveAttr(el, 'class');
-  if (process.env.NODE_ENV !== 'production' && staticClass) {
-    var res = parseText(staticClass, options.delimiters);
-    if (res) {
-      warn(
-        "class=\"" + staticClass + "\": " +
-        'Interpolation inside attributes has been removed. ' +
-        'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
-      );
-    }
-  }
-  if (staticClass) {
-    el.staticClass = JSON.stringify(staticClass);
-  }
-  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-  if (classBinding) {
-    el.classBinding = classBinding;
-  }
-}
-
-function genData (el) {
-  var data = '';
-  if (el.staticClass) {
-    data += "staticClass:" + (el.staticClass) + ",";
-  }
-  if (el.classBinding) {
-    data += "class:" + (el.classBinding) + ",";
-  }
-  return data
-}
-
-var klass$1 = {
-  staticKeys: ['staticClass'],
-  transformNode: transformNode,
-  genData: genData
-};
-
-/*  */
-
-function transformNode$1 (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticStyle = getAndRemoveAttr(el, 'style');
-  if (staticStyle) {
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
-      var res = parseText(staticStyle, options.delimiters);
-      if (res) {
-        warn(
-          "style=\"" + staticStyle + "\": " +
-          'Interpolation inside attributes has been removed. ' +
-          'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
-        );
-      }
-    }
-    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
-  }
-
-  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-  if (styleBinding) {
-    el.styleBinding = styleBinding;
-  }
-}
-
-function genData$1 (el) {
-  var data = '';
-  if (el.staticStyle) {
-    data += "staticStyle:" + (el.staticStyle) + ",";
-  }
-  if (el.styleBinding) {
-    data += "style:(" + (el.styleBinding) + "),";
-  }
-  return data
-}
-
-var style$1 = {
-  staticKeys: ['staticStyle'],
-  transformNode: transformNode$1,
-  genData: genData$1
-};
-
-/*  */
-
-var decoder;
-
-var he = {
-  decode: function decode (html) {
-    decoder = decoder || document.createElement('div');
-    decoder.innerHTML = html;
-    return decoder.textContent
-  }
-};
-
-/*  */
-
-var isUnaryTag = makeMap(
-  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
-  'link,meta,param,source,track,wbr'
-);
-
-// Elements that you can, intentionally, leave open
-// (and which close themselves)
-var canBeLeftOpenTag = makeMap(
-  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
-);
-
-// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
-// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
-var isNonPhrasingTag = makeMap(
-  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
-  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
-  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
-  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
-  'title,tr,track'
-);
-
-/**
- * Not type-checking this file because it's mostly vendor code.
- */
-
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
-// Regular Expressions for parsing tags and attributes
-var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
-var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
-var startTagOpen = new RegExp(("^<" + qnameCapture));
-var startTagClose = /^\s*(\/?)>/;
-var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
-var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
-var conditionalComment = /^<!\[/;
-
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
-// Special Elements (can contain anything)
-var isPlainTextElement = makeMap('script,style,textarea', true);
-var reCache = {};
-
-var decodingMap = {
-  '&lt;': '<',
-  '&gt;': '>',
-  '&quot;': '"',
-  '&amp;': '&',
-  '&#10;': '\n',
-  '&#9;': '\t'
-};
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
-
-// #5992
-var isIgnoreNewlineTag = makeMap('pre,textarea', true);
-var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
-
-function decodeAttr (value, shouldDecodeNewlines) {
-  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-  return value.replace(re, function (match) { return decodingMap[match]; })
-}
-
-function parseHTML (html, options) {
-  var stack = [];
-  var expectHTML = options.expectHTML;
-  var isUnaryTag$$1 = options.isUnaryTag || no;
-  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-  var index = 0;
-  var last, lastTag;
-  while (html) {
-    last = html;
-    // Make sure we're not in a plaintext content element like script/style
-    if (!lastTag || !isPlainTextElement(lastTag)) {
-      var textEnd = html.indexOf('<');
-      if (textEnd === 0) {
-        // Comment:
-        if (comment.test(html)) {
-          var commentEnd = html.indexOf('-->');
-
-          if (commentEnd >= 0) {
-            if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
-            }
-            advance(commentEnd + 3);
-            continue
-          }
-        }
-
-        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
-        if (conditionalComment.test(html)) {
-          var conditionalEnd = html.indexOf(']>');
-
-          if (conditionalEnd >= 0) {
-            advance(conditionalEnd + 2);
-            continue
-          }
-        }
-
-        // Doctype:
-        var doctypeMatch = html.match(doctype);
-        if (doctypeMatch) {
-          advance(doctypeMatch[0].length);
-          continue
-        }
-
-        // End tag:
-        var endTagMatch = html.match(endTag);
-        if (endTagMatch) {
-          var curIndex = index;
-          advance(endTagMatch[0].length);
-          parseEndTag(endTagMatch[1], curIndex, index);
-          continue
-        }
-
-        // Start tag:
-        var startTagMatch = parseStartTag();
-        if (startTagMatch) {
-          handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
-            advance(1);
-          }
-          continue
-        }
-      }
-
-      var text = (void 0), rest = (void 0), next = (void 0);
-      if (textEnd >= 0) {
-        rest = html.slice(textEnd);
-        while (
-          !endTag.test(rest) &&
-          !startTagOpen.test(rest) &&
-          !comment.test(rest) &&
-          !conditionalComment.test(rest)
-        ) {
-          // < in plain text, be forgiving and treat it as text
-          next = rest.indexOf('<', 1);
-          if (next < 0) { break }
-          textEnd += next;
-          rest = html.slice(textEnd);
-        }
-        text = html.substring(0, textEnd);
-        advance(textEnd);
-      }
-
-      if (textEnd < 0) {
-        text = html;
-        html = '';
-      }
-
-      if (options.chars && text) {
-        options.chars(text);
-      }
-    } else {
-      var endTagLength = 0;
-      var stackedTag = lastTag.toLowerCase();
-      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
-        endTagLength = endTag.length;
-        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
-          text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
-            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
-        }
-        if (shouldIgnoreFirstNewline(stackedTag, text)) {
-          text = text.slice(1);
-        }
-        if (options.chars) {
-          options.chars(text);
-        }
-        return ''
-      });
-      index += html.length - rest$1.length;
-      html = rest$1;
-      parseEndTag(stackedTag, index - endTagLength, index);
-    }
-
-    if (html === last) {
-      options.chars && options.chars(html);
-      if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
-      }
-      break
-    }
-  }
-
-  // Clean up any remaining tags
-  parseEndTag();
-
-  function advance (n) {
-    index += n;
-    html = html.substring(n);
-  }
-
-  function parseStartTag () {
-    var start = html.match(startTagOpen);
-    if (start) {
-      var match = {
-        tagName: start[1],
-        attrs: [],
-        start: index
-      };
-      advance(start[0].length);
-      var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
-        advance(attr[0].length);
-        match.attrs.push(attr);
-      }
-      if (end) {
-        match.unarySlash = end[1];
-        advance(end[0].length);
-        match.end = index;
-        return match
-      }
-    }
-  }
-
-  function handleStartTag (match) {
-    var tagName = match.tagName;
-    var unarySlash = match.unarySlash;
-
-    if (expectHTML) {
-      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-        parseEndTag(lastTag);
-      }
-      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-        parseEndTag(tagName);
-      }
-    }
-
-    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
-
-    var l = match.attrs.length;
-    var attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
-      var value = args[3] || args[4] || args[5] || '';
-      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
-        ? options.shouldDecodeNewlinesForHref
-        : options.shouldDecodeNewlines;
-      attrs[i] = {
-        name: args[1],
-        value: decodeAttr(value, shouldDecodeNewlines)
-      };
-    }
-
-    if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
-      lastTag = tagName;
-    }
-
-    if (options.start) {
-      options.start(tagName, attrs, unary, match.start, match.end);
-    }
-  }
-
-  function parseEndTag (tagName, start, end) {
-    var pos, lowerCasedTagName;
-    if (start == null) { start = index; }
-    if (end == null) { end = index; }
-
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
-    // Find the closest opened tag of the same type
-    if (tagName) {
-      for (pos = stack.length - 1; pos >= 0; pos--) {
-        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
-          break
-        }
-      }
-    } else {
-      // If no tag name is provided, clean shop
-      pos = 0;
-    }
-
-    if (pos >= 0) {
-      // Close all the open elements, up the stack
-      for (var i = stack.length - 1; i >= pos; i--) {
-        if (process.env.NODE_ENV !== 'production' &&
-          (i > pos || !tagName) &&
-          options.warn
-        ) {
-          options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
-          );
-        }
-        if (options.end) {
-          options.end(stack[i].tag, start, end);
-        }
-      }
-
-      // Remove the open elements from the stack
-      stack.length = pos;
-      lastTag = pos && stack[pos - 1].tag;
-    } else if (lowerCasedTagName === 'br') {
-      if (options.start) {
-        options.start(tagName, [], true, start, end);
-      }
-    } else if (lowerCasedTagName === 'p') {
-      if (options.start) {
-        options.start(tagName, [], false, start, end);
-      }
-      if (options.end) {
-        options.end(tagName, start, end);
-      }
-    }
-  }
-}
-
-/*  */
-
-var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
-var stripParensRE = /^\(|\)$/g;
-
-var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
-
-var decodeHTMLCached = cached(he.decode);
-
-// configurable state
-var warn$2;
-var delimiters;
-var transforms;
-var preTransforms;
-var postTransforms;
-var platformIsPreTag;
-var platformMustUseProp;
-var platformGetTagNamespace;
-
-
-
-function createASTElement (
-  tag,
-  attrs,
-  parent
-) {
-  return {
-    type: 1,
-    tag: tag,
-    attrsList: attrs,
-    attrsMap: makeAttrsMap(attrs),
-    parent: parent,
-    children: []
-  }
-}
-
-/**
- * Convert HTML string to AST.
- */
-function parse (
-  template,
-  options
-) {
-  warn$2 = options.warn || baseWarn;
-
-  platformIsPreTag = options.isPreTag || no;
-  platformMustUseProp = options.mustUseProp || no;
-  platformGetTagNamespace = options.getTagNamespace || no;
-
-  transforms = pluckModuleFunction(options.modules, 'transformNode');
-  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-  delimiters = options.delimiters;
-
-  var stack = [];
-  var preserveWhitespace = options.preserveWhitespace !== false;
-  var root;
-  var currentParent;
-  var inVPre = false;
-  var inPre = false;
-  var warned = false;
-
-  function warnOnce (msg) {
-    if (!warned) {
-      warned = true;
-      warn$2(msg);
-    }
-  }
-
-  function closeElement (element) {
-    // check pre state
-    if (element.pre) {
-      inVPre = false;
-    }
-    if (platformIsPreTag(element.tag)) {
-      inPre = false;
-    }
-    // apply post-transforms
-    for (var i = 0; i < postTransforms.length; i++) {
-      postTransforms[i](element, options);
-    }
-  }
-
-  parseHTML(template, {
-    warn: warn$2,
-    expectHTML: options.expectHTML,
-    isUnaryTag: options.isUnaryTag,
-    canBeLeftOpenTag: options.canBeLeftOpenTag,
-    shouldDecodeNewlines: options.shouldDecodeNewlines,
-    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
-    shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
-      // check namespace.
-      // inherit parent ns if there is one
-      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
-
-      // handle IE svg bug
-      /* istanbul ignore if */
-      if (isIE && ns === 'svg') {
-        attrs = guardIESVGBug(attrs);
-      }
-
-      var element = createASTElement(tag, attrs, currentParent);
-      if (ns) {
-        element.ns = ns;
-      }
-
-      if (isForbiddenTag(element) && !isServerRendering()) {
-        element.forbidden = true;
-        process.env.NODE_ENV !== 'production' && warn$2(
-          'Templates should only be responsible for mapping the state to the ' +
-          'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
-        );
-      }
-
-      // apply pre-transforms
-      for (var i = 0; i < preTransforms.length; i++) {
-        element = preTransforms[i](element, options) || element;
-      }
-
-      if (!inVPre) {
-        processPre(element);
-        if (element.pre) {
-          inVPre = true;
-        }
-      }
-      if (platformIsPreTag(element.tag)) {
-        inPre = true;
-      }
-      if (inVPre) {
-        processRawAttrs(element);
-      } else if (!element.processed) {
-        // structural directives
-        processFor(element);
-        processIf(element);
-        processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
-
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
-      }
-
-      // tree management
-      if (!root) {
-        root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
-        }
-      }
-      if (!unary) {
-        currentParent = element;
-        stack.push(element);
-      } else {
-        closeElement(element);
-      }
-    },
-
-    end: function end () {
-      // remove trailing whitespace
-      var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
-      // pop stack
-      stack.length -= 1;
-      currentParent = stack[stack.length - 1];
-      closeElement(element);
-    },
-
-    chars: function chars (text) {
-      if (!currentParent) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (text === template) {
-            warnOnce(
-              'Component template requires a root element, rather than just text.'
-            );
-          } else if ((text = text.trim())) {
-            warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
-            );
-          }
-        }
-        return
-      }
-      // IE textarea placeholder bug
-      /* istanbul ignore if */
-      if (isIE &&
-        currentParent.tag === 'textarea' &&
-        currentParent.attrsMap.placeholder === text
-      ) {
-        return
-      }
-      var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
-      if (text) {
-        var res;
-        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
-            type: 2,
-            expression: res.expression,
-            tokens: res.tokens,
-            text: text
-          });
-        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
-            type: 3,
-            text: text
-          });
-        }
-      }
-    },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
-    }
-  });
-  return root
-}
-
-function processPre (el) {
-  if (getAndRemoveAttr(el, 'v-pre') != null) {
-    el.pre = true;
-  }
-}
-
-function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
-      };
-    }
-  } else if (!el.pre) {
-    // non root node in pre blocks with no attributes
-    el.plain = true;
-  }
-}
-
-function processElement (element, options) {
-  processKey(element);
-
-  // determine whether this is a plain element after
-  // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
-
-  processRef(element);
-  processSlot(element);
-  processComponent(element);
-  for (var i = 0; i < transforms.length; i++) {
-    element = transforms[i](element, options) || element;
-  }
-  processAttrs(element);
-}
-
-function processKey (el) {
-  var exp = getBindingAttr(el, 'key');
-  if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn$2("<template> cannot be keyed. Place the key on real elements instead.");
-    }
-    el.key = exp;
-  }
-}
-
-function processRef (el) {
-  var ref = getBindingAttr(el, 'ref');
-  if (ref) {
-    el.ref = ref;
-    el.refInFor = checkInFor(el);
-  }
-}
-
-function processFor (el) {
-  var exp;
-  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    var res = parseFor(exp);
-    if (res) {
-      extend(el, res);
-    } else if (process.env.NODE_ENV !== 'production') {
-      warn$2(
-        ("Invalid v-for expression: " + exp)
-      );
-    }
-  }
-}
-
-function parseFor (exp) {
-  var inMatch = exp.match(forAliasRE);
-  if (!inMatch) { return }
-  var res = {};
-  res.for = inMatch[2].trim();
-  var alias = inMatch[1].trim().replace(stripParensRE, '');
-  var iteratorMatch = alias.match(forIteratorRE);
-  if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
-    res.iterator1 = iteratorMatch[1].trim();
-    if (iteratorMatch[2]) {
-      res.iterator2 = iteratorMatch[2].trim();
-    }
-  } else {
-    res.alias = alias;
-  }
-  return res
-}
-
-function processIf (el) {
-  var exp = getAndRemoveAttr(el, 'v-if');
-  if (exp) {
-    el.if = exp;
-    addIfCondition(el, {
-      exp: exp,
-      block: el
-    });
-  } else {
-    if (getAndRemoveAttr(el, 'v-else') != null) {
-      el.else = true;
-    }
-    var elseif = getAndRemoveAttr(el, 'v-else-if');
-    if (elseif) {
-      el.elseif = elseif;
-    }
-  }
-}
-
-function processIfConditions (el, parent) {
-  var prev = findPrevElement(parent.children);
-  if (prev && prev.if) {
-    addIfCondition(prev, {
-      exp: el.elseif,
-      block: el
-    });
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn$2(
-      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
-    );
-  }
-}
-
-function findPrevElement (children) {
-  var i = children.length;
-  while (i--) {
-    if (children[i].type === 1) {
-      return children[i]
-    } else {
-      if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
-        warn$2(
-          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
-        );
-      }
-      children.pop();
-    }
-  }
-}
-
-function addIfCondition (el, condition) {
-  if (!el.ifConditions) {
-    el.ifConditions = [];
-  }
-  el.ifConditions.push(condition);
-}
-
-function processOnce (el) {
-  var once$$1 = getAndRemoveAttr(el, 'v-once');
-  if (once$$1 != null) {
-    el.once = true;
-  }
-}
-
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if (process.env.NODE_ENV !== 'production' && el.key) {
-      warn$2(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
-      );
-    }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn$2(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
-      }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn$2(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
-      }
-      el.slotScope = slotScope;
-    }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
-    }
-  }
-}
-
-function processComponent (el) {
-  var binding;
-  if ((binding = getBindingAttr(el, 'is'))) {
-    el.component = binding;
-  }
-  if (getAndRemoveAttr(el, 'inline-template') != null) {
-    el.inlineTemplate = true;
-  }
-}
-
-function processAttrs (el) {
-  var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
-  for (i = 0, l = list.length; i < l; i++) {
-    name = rawName = list[i].name;
-    value = list[i].value;
-    if (dirRE.test(name)) {
-      // mark element as dynamic
-      el.hasBindings = true;
-      // modifiers
-      modifiers = parseModifiers(name);
-      if (modifiers) {
-        name = name.replace(modifierRE, '');
-      }
-      if (bindRE.test(name)) { // v-bind
-        name = name.replace(bindRE, '');
-        value = parseFilters(value);
-        isProp = false;
-        if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
-            name = camelize(name);
-            if (name === 'innerHtml') { name = 'innerHTML'; }
-          }
-          if (modifiers.camel) {
-            name = camelize(name);
-          }
-          if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
-          }
-        }
-        if (isProp || (
-          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
-        )) {
-          addProp(el, name, value);
-        } else {
-          addAttr(el, name, value);
-        }
-      } else if (onRE.test(name)) { // v-on
-        name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$2);
-      } else { // normal directives
-        name = name.replace(dirRE, '');
-        // parse arg
-        var argMatch = name.match(argRE);
-        var arg = argMatch && argMatch[1];
-        if (arg) {
-          name = name.slice(0, -(arg.length + 1));
-        }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if (process.env.NODE_ENV !== 'production' && name === 'model') {
-          checkForAliasModel(el, value);
-        }
-      }
-    } else {
-      // literal attribute
-      if (process.env.NODE_ENV !== 'production') {
-        var res = parseText(value, delimiters);
-        if (res) {
-          warn$2(
-            name + "=\"" + value + "\": " +
-            'Interpolation inside attributes has been removed. ' +
-            'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
-          );
-        }
-      }
-      addAttr(el, name, JSON.stringify(value));
-      // #6887 firefox doesn't update muted state if set via attribute
-      // even immediately after element creation
-      if (!el.component &&
-          name === 'muted' &&
-          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
-      }
-    }
-  }
-}
-
-function checkInFor (el) {
-  var parent = el;
-  while (parent) {
-    if (parent.for !== undefined) {
-      return true
-    }
-    parent = parent.parent;
-  }
-  return false
-}
-
-function parseModifiers (name) {
-  var match = name.match(modifierRE);
-  if (match) {
-    var ret = {};
-    match.forEach(function (m) { ret[m.slice(1)] = true; });
-    return ret
-  }
-}
-
-function makeAttrsMap (attrs) {
-  var map = {};
-  for (var i = 0, l = attrs.length; i < l; i++) {
-    if (
-      process.env.NODE_ENV !== 'production' &&
-      map[attrs[i].name] && !isIE && !isEdge
-    ) {
-      warn$2('duplicate attribute: ' + attrs[i].name);
-    }
-    map[attrs[i].name] = attrs[i].value;
-  }
-  return map
-}
-
-// for script (e.g. type="x/template") or style, do not decode content
-function isTextTag (el) {
-  return el.tag === 'script' || el.tag === 'style'
-}
-
-function isForbiddenTag (el) {
-  return (
-    el.tag === 'style' ||
-    (el.tag === 'script' && (
-      !el.attrsMap.type ||
-      el.attrsMap.type === 'text/javascript'
-    ))
-  )
-}
-
-var ieNSBug = /^xmlns:NS\d+/;
-var ieNSPrefix = /^NS\d+:/;
-
-/* istanbul ignore next */
-function guardIESVGBug (attrs) {
-  var res = [];
-  for (var i = 0; i < attrs.length; i++) {
-    var attr = attrs[i];
-    if (!ieNSBug.test(attr.name)) {
-      attr.name = attr.name.replace(ieNSPrefix, '');
-      res.push(attr);
-    }
-  }
-  return res
-}
-
-function checkForAliasModel (el, value) {
-  var _el = el;
-  while (_el) {
-    if (_el.for && _el.alias === value) {
-      warn$2(
-        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-        "You are binding v-model directly to a v-for iteration alias. " +
-        "This will not be able to modify the v-for source array because " +
-        "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
-      );
-    }
-    _el = _el.parent;
-  }
-}
-
-/*  */
-
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
-function preTransformNode (el, options) {
-  if (el.tag === 'input') {
-    var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
-      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
-      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
-      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
-      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
-      // 1. checkbox
-      var branch0 = cloneASTElement(el);
-      // process for on the main node
-      processFor(branch0);
-      addRawAttr(branch0, 'type', 'checkbox');
-      processElement(branch0, options);
-      branch0.processed = true; // prevent it from double-processed
-      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
-      addIfCondition(branch0, {
-        exp: branch0.if,
-        block: branch0
-      });
-      // 2. add radio else-if condition
-      var branch1 = cloneASTElement(el);
-      getAndRemoveAttr(branch1, 'v-for', true);
-      addRawAttr(branch1, 'type', 'radio');
-      processElement(branch1, options);
-      addIfCondition(branch0, {
-        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
-        block: branch1
-      });
-      // 3. other
-      var branch2 = cloneASTElement(el);
-      getAndRemoveAttr(branch2, 'v-for', true);
-      addRawAttr(branch2, ':type', typeBinding);
-      processElement(branch2, options);
-      addIfCondition(branch0, {
-        exp: ifCondition,
-        block: branch2
-      });
-
-      if (hasElse) {
-        branch0.else = true;
-      } else if (elseIfCondition) {
-        branch0.elseif = elseIfCondition;
-      }
-
-      return branch0
-    }
-  }
-}
-
-function cloneASTElement (el) {
-  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
-}
-
-var model$2 = {
-  preTransformNode: preTransformNode
-};
-
-var modules$1 = [
-  klass$1,
-  style$1,
-  model$2
-];
-
-/*  */
-
-function text (el, dir) {
-  if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-/*  */
-
-function html (el, dir) {
-  if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-var directives$1 = {
-  model: model,
-  text: text,
-  html: html
-};
-
-/*  */
-
-var baseOptions = {
-  expectHTML: true,
-  modules: modules$1,
-  directives: directives$1,
-  isPreTag: isPreTag,
-  isUnaryTag: isUnaryTag,
-  mustUseProp: mustUseProp,
-  canBeLeftOpenTag: canBeLeftOpenTag,
-  isReservedTag: isReservedTag,
-  getTagNamespace: getTagNamespace,
-  staticKeys: genStaticKeys(modules$1)
-};
-
-/*  */
-
-var isStaticKey;
-var isPlatformReservedTag;
-
-var genStaticKeysCached = cached(genStaticKeys$1);
-
-/**
- * Goal of the optimizer: walk the generated template AST tree
- * and detect sub-trees that are purely static, i.e. parts of
- * the DOM that never needs to change.
- *
- * Once we detect these sub-trees, we can:
- *
- * 1. Hoist them into constants, so that we no longer need to
- *    create fresh nodes for them on each re-render;
- * 2. Completely skip them in the patching process.
- */
-function optimize (root, options) {
-  if (!root) { return }
-  isStaticKey = genStaticKeysCached(options.staticKeys || '');
-  isPlatformReservedTag = options.isReservedTag || no;
-  // first pass: mark all non-static nodes.
-  markStatic$1(root);
-  // second pass: mark static roots.
-  markStaticRoots(root, false);
-}
-
-function genStaticKeys$1 (keys) {
-  return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
-    (keys ? ',' + keys : '')
-  )
-}
-
-function markStatic$1 (node) {
-  node.static = isStatic(node);
-  if (node.type === 1) {
-    // do not make component slot content static. this avoids
-    // 1. components not able to mutate slot nodes
-    // 2. static slot content fails for hot-reloading
-    if (
-      !isPlatformReservedTag(node.tag) &&
-      node.tag !== 'slot' &&
-      node.attrsMap['inline-template'] == null
-    ) {
-      return
-    }
-    for (var i = 0, l = node.children.length; i < l; i++) {
-      var child = node.children[i];
-      markStatic$1(child);
-      if (!child.static) {
-        node.static = false;
-      }
-    }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        var block = node.ifConditions[i$1].block;
-        markStatic$1(block);
-        if (!block.static) {
-          node.static = false;
-        }
-      }
-    }
-  }
-}
-
-function markStaticRoots (node, isInFor) {
-  if (node.type === 1) {
-    if (node.static || node.once) {
-      node.staticInFor = isInFor;
-    }
-    // For a node to qualify as a static root, it should have children that
-    // are not just static text. Otherwise the cost of hoisting out will
-    // outweigh the benefits and it's better off to just always render it fresh.
-    if (node.static && node.children.length && !(
-      node.children.length === 1 &&
-      node.children[0].type === 3
-    )) {
-      node.staticRoot = true;
-      return
-    } else {
-      node.staticRoot = false;
-    }
-    if (node.children) {
-      for (var i = 0, l = node.children.length; i < l; i++) {
-        markStaticRoots(node.children[i], isInFor || !!node.for);
-      }
-    }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        markStaticRoots(node.ifConditions[i$1].block, isInFor);
-      }
-    }
-  }
-}
-
-function isStatic (node) {
-  if (node.type === 2) { // expression
-    return false
-  }
-  if (node.type === 3) { // text
-    return true
-  }
-  return !!(node.pre || (
-    !node.hasBindings && // no dynamic bindings
-    !node.if && !node.for && // not v-if or v-for or v-else
-    !isBuiltInTag(node.tag) && // not a built-in
-    isPlatformReservedTag(node.tag) && // not a component
-    !isDirectChildOfTemplateFor(node) &&
-    Object.keys(node).every(isStaticKey)
-  ))
-}
-
-function isDirectChildOfTemplateFor (node) {
-  while (node.parent) {
-    node = node.parent;
-    if (node.tag !== 'template') {
-      return false
-    }
-    if (node.for) {
-      return true
-    }
-  }
-  return false
-}
-
-/*  */
-
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
-
-// keyCode aliases
-var keyCodes = {
-  esc: 27,
-  tab: 9,
-  enter: 13,
-  space: 32,
-  up: 38,
-  left: 37,
-  right: 39,
-  down: 40,
-  'delete': [8, 46]
-};
-
-// #4868: modifiers that prevent the execution of the listener
-// need to explicitly return null so that we can determine whether to remove
-// the listener for .once
-var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
-
-var modifierCode = {
-  stop: '$event.stopPropagation();',
-  prevent: '$event.preventDefault();',
-  self: genGuard("$event.target !== $event.currentTarget"),
-  ctrl: genGuard("!$event.ctrlKey"),
-  shift: genGuard("!$event.shiftKey"),
-  alt: genGuard("!$event.altKey"),
-  meta: genGuard("!$event.metaKey"),
-  left: genGuard("'button' in $event && $event.button !== 0"),
-  middle: genGuard("'button' in $event && $event.button !== 1"),
-  right: genGuard("'button' in $event && $event.button !== 2")
-};
-
-function genHandlers (
-  events,
-  isNative,
-  warn
-) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
-  for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
-  }
-  return res.slice(0, -1) + '}'
-}
-
-function genHandler (
-  name,
-  handler
-) {
-  if (!handler) {
-    return 'function(){}'
-  }
-
-  if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
-  }
-
-  var isMethodPath = simplePathRE.test(handler.value);
-  var isFunctionExpression = fnExpRE.test(handler.value);
-
-  if (!handler.modifiers) {
-    if (isMethodPath || isFunctionExpression) {
-      return handler.value
-    }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
-  } else {
-    var code = '';
-    var genModifierCode = '';
-    var keys = [];
-    for (var key in handler.modifiers) {
-      if (modifierCode[key]) {
-        genModifierCode += modifierCode[key];
-        // left/right
-        if (keyCodes[key]) {
-          keys.push(key);
-        }
-      } else if (key === 'exact') {
-        var modifiers = (handler.modifiers);
-        genModifierCode += genGuard(
-          ['ctrl', 'shift', 'alt', 'meta']
-            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
-            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
-            .join('||')
-        );
-      } else {
-        keys.push(key);
-      }
-    }
-    if (keys.length) {
-      code += genKeyFilter(keys);
-    }
-    // Make sure modifiers like prevent and stop get executed after key filtering
-    if (genModifierCode) {
-      code += genModifierCode;
-    }
-    var handlerCode = isMethodPath
-      ? handler.value + '($event)'
-      : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
-    return ("function($event){" + code + handlerCode + "}")
-  }
-}
-
-function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
-}
-
-function genFilterCode (key) {
-  var keyVal = parseInt(key, 10);
-  if (keyVal) {
-    return ("$event.keyCode!==" + keyVal)
-  }
-  var code = keyCodes[key];
-  return (
-    "_k($event.keyCode," +
-    (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
-  )
-}
-
-/*  */
-
-function on (el, dir) {
-  if (process.env.NODE_ENV !== 'production' && dir.modifiers) {
-    warn("v-on without argument does not support modifiers.");
-  }
-  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
-}
-
-/*  */
-
-function bind$1 (el, dir) {
-  el.wrapData = function (code) {
-    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
-  };
-}
-
-/*  */
-
-var baseDirectives = {
-  on: on,
-  bind: bind$1,
-  cloak: noop
-};
-
-/*  */
-
-var CodegenState = function CodegenState (options) {
-  this.options = options;
-  this.warn = options.warn || baseWarn;
-  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
-  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
-  this.directives = extend(extend({}, baseDirectives), options.directives);
-  var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
-  this.onceId = 0;
-  this.staticRenderFns = [];
-};
-
-
-
-function generate (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genElement (el, state) {
-  if (el.staticRoot && !el.staticProcessed) {
-    return genStatic(el, state)
-  } else if (el.once && !el.onceProcessed) {
-    return genOnce(el, state)
-  } else if (el.for && !el.forProcessed) {
-    return genFor(el, state)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return genChildren(el, state) || 'void 0'
-  } else if (el.tag === 'slot') {
-    return genSlot(el, state)
-  } else {
-    // component or element
-    var code;
-    if (el.component) {
-      code = genComponent(el.component, el, state);
-    } else {
-      var data = el.plain ? undefined : genData$2(el, state);
-
-      var children = el.inlineTemplate ? null : genChildren(el, state, true);
-      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
-    }
-    // module transforms
-    for (var i = 0; i < state.transforms.length; i++) {
-      code = state.transforms[i](el, code);
-    }
-    return code
-  }
-}
-
-// hoist static sub-trees out
-function genStatic (el, state) {
-  el.staticProcessed = true;
-  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
-  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
-}
-
-// v-once
-function genOnce (el, state) {
-  el.onceProcessed = true;
-  if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.staticInFor) {
-    var key = '';
-    var parent = el.parent;
-    while (parent) {
-      if (parent.for) {
-        key = parent.key;
-        break
-      }
-      parent = parent.parent;
-    }
-    if (!key) {
-      process.env.NODE_ENV !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
-      );
-      return genElement(el, state)
-    }
-    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
-  } else {
-    return genStatic(el, state)
-  }
-}
-
-function genIf (
-  el,
-  state,
-  altGen,
-  altEmpty
-) {
-  el.ifProcessed = true; // avoid recursion
-  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
-}
-
-function genIfConditions (
-  conditions,
-  state,
-  altGen,
-  altEmpty
-) {
-  if (!conditions.length) {
-    return altEmpty || '_e()'
-  }
-
-  var condition = conditions.shift();
-  if (condition.exp) {
-    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
-  } else {
-    return ("" + (genTernaryExp(condition.block)))
-  }
-
-  // v-if with v-once should generate code like (a)?_m(0):_m(1)
-  function genTernaryExp (el) {
-    return altGen
-      ? altGen(el, state)
-      : el.once
-        ? genOnce(el, state)
-        : genElement(el, state)
-  }
-}
-
-function genFor (
-  el,
-  state,
-  altGen,
-  altHelper
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-
-  if (process.env.NODE_ENV !== 'production' &&
-    state.maybeComponent(el) &&
-    el.tag !== 'slot' &&
-    el.tag !== 'template' &&
-    !el.key
-  ) {
-    state.warn(
-      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
-      "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
-      true /* tip */
-    );
-  }
-
-  el.forProcessed = true; // avoid recursion
-  return (altHelper || '_l') + "((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + ((altGen || genElement)(el, state)) +
-    '})'
-}
-
-function genData$2 (el, state) {
-  var data = '{';
-
-  // directives first.
-  // directives may mutate the el's other properties before they are generated.
-  var dirs = genDirectives(el, state);
-  if (dirs) { data += dirs + ','; }
-
-  // key
-  if (el.key) {
-    data += "key:" + (el.key) + ",";
-  }
-  // ref
-  if (el.ref) {
-    data += "ref:" + (el.ref) + ",";
-  }
-  if (el.refInFor) {
-    data += "refInFor:true,";
-  }
-  // pre
-  if (el.pre) {
-    data += "pre:true,";
-  }
-  // record original tag name for components using "is" attribute
-  if (el.component) {
-    data += "tag:\"" + (el.tag) + "\",";
-  }
-  // module data generation functions
-  for (var i = 0; i < state.dataGenFns.length; i++) {
-    data += state.dataGenFns[i](el);
-  }
-  // attributes
-  if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
-  }
-  // DOM props
-  if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
-  }
-  // event handlers
-  if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
-  }
-  if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
-  }
-  // slot target
-  // only for non-scoped slots
-  if (el.slotTarget && !el.slotScope) {
-    data += "slot:" + (el.slotTarget) + ",";
-  }
-  // scoped slots
-  if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
-  }
-  // component v-model
-  if (el.model) {
-    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
-  }
-  // inline-template
-  if (el.inlineTemplate) {
-    var inlineTemplate = genInlineTemplate(el, state);
-    if (inlineTemplate) {
-      data += inlineTemplate + ",";
-    }
-  }
-  data = data.replace(/,$/, '') + '}';
-  // v-bind data wrap
-  if (el.wrapData) {
-    data = el.wrapData(data);
-  }
-  // v-on data wrap
-  if (el.wrapListeners) {
-    data = el.wrapListeners(data);
-  }
-  return data
-}
-
-function genDirectives (el, state) {
-  var dirs = el.directives;
-  if (!dirs) { return }
-  var res = 'directives:[';
-  var hasRuntime = false;
-  var i, l, dir, needRuntime;
-  for (i = 0, l = dirs.length; i < l; i++) {
-    dir = dirs[i];
-    needRuntime = true;
-    var gen = state.directives[dir.name];
-    if (gen) {
-      // compile-time directive that manipulates AST.
-      // returns true if it also needs a runtime counterpart.
-      needRuntime = !!gen(el, dir, state.warn);
-    }
-    if (needRuntime) {
-      hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
-    }
-  }
-  if (hasRuntime) {
-    return res.slice(0, -1) + ']'
-  }
-}
-
-function genInlineTemplate (el, state) {
-  var ast = el.children[0];
-  if (process.env.NODE_ENV !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
-  }
-  if (ast.type === 1) {
-    var inlineRenderFns = generate(ast, state.options);
-    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
-  }
-}
-
-function genScopedSlots (
-  slots,
-  state
-) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
-}
-
-function genScopedSlot (
-  key,
-  el,
-  state
-) {
-  if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
-  }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
-    "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
-        : genChildren(el, state) || 'undefined'
-      : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
-}
-
-function genChildren (
-  el,
-  state,
-  checkSkip,
-  altGenElement,
-  altGenNode
-) {
-  var children = el.children;
-  if (children.length) {
-    var el$1 = children[0];
-    // optimize single v-for
-    if (children.length === 1 &&
-      el$1.for &&
-      el$1.tag !== 'template' &&
-      el$1.tag !== 'slot'
-    ) {
-      return (altGenElement || genElement)(el$1, state)
-    }
-    var normalizationType = checkSkip
-      ? getNormalizationType(children, state.maybeComponent)
-      : 0;
-    var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
-  }
-}
-
-// determine the normalization needed for the children array.
-// 0: no normalization needed
-// 1: simple normalization needed (possible 1-level deep nested array)
-// 2: full normalization needed
-function getNormalizationType (
-  children,
-  maybeComponent
-) {
-  var res = 0;
-  for (var i = 0; i < children.length; i++) {
-    var el = children[i];
-    if (el.type !== 1) {
-      continue
-    }
-    if (needsNormalization(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
-      res = 2;
-      break
-    }
-    if (maybeComponent(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
-      res = 1;
-    }
-  }
-  return res
-}
-
-function needsNormalization (el) {
-  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
-}
-
-function genNode (node, state) {
-  if (node.type === 1) {
-    return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
-    return genComment(node)
-  } else {
-    return genText(node)
-  }
-}
-
-function genText (text) {
-  return ("_v(" + (text.type === 2
-    ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
-}
-
-function genComment (comment) {
-  return ("_e(" + (JSON.stringify(comment.text)) + ")")
-}
-
-function genSlot (el, state) {
-  var slotName = el.slotName || '"default"';
-  var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
-  var bind$$1 = el.attrsMap['v-bind'];
-  if ((attrs || bind$$1) && !children) {
-    res += ",null";
-  }
-  if (attrs) {
-    res += "," + attrs;
-  }
-  if (bind$$1) {
-    res += (attrs ? '' : ',null') + "," + bind$$1;
-  }
-  return res + ')'
-}
-
-// componentName is el.component, take it as argument to shun flow's pessimistic refinement
-function genComponent (
-  componentName,
-  el,
-  state
-) {
-  var children = el.inlineTemplate ? null : genChildren(el, state, true);
-  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
-}
-
-function genProps (props) {
-  var res = '';
-  for (var i = 0; i < props.length; i++) {
-    var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
-    }
-  }
-  return res.slice(0, -1)
-}
-
-// #3895, #4268
-function transformSpecialNewlines (text) {
-  return text
-    .replace(/\u2028/g, '\\u2028')
-    .replace(/\u2029/g, '\\u2029')
-}
-
-/*  */
-
-// these keywords should not appear inside expressions, but operators like
-// typeof, instanceof and in are allowed
-var prohibitedKeywordRE = new RegExp('\\b' + (
-  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
-  'super,throw,while,yield,delete,export,import,return,switch,default,' +
-  'extends,finally,continue,debugger,function,arguments'
-).split(',').join('\\b|\\b') + '\\b');
-
-// these unary operators should not be used as property/method names
-var unaryOperatorsRE = new RegExp('\\b' + (
-  'delete,typeof,void'
-).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
-
-// strip strings in expressions
-var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
-
-// detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
-  if (ast) {
-    checkNode(ast, errors);
-  }
-  return errors
-}
-
-function checkNode (node, errors) {
-  if (node.type === 1) {
-    for (var name in node.attrsMap) {
-      if (dirRE.test(name)) {
-        var value = node.attrsMap[name];
-        if (value) {
-          if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
-          } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
-          } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
-          }
-        }
-      }
-    }
-    if (node.children) {
-      for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
-      }
-    }
-  } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
-  }
-}
-
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
-      "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
-    );
-  }
-  checkExpression(exp, text, errors);
-}
-
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
-}
-
-function checkIdentifier (
-  ident,
-  type,
-  text,
-  errors
-) {
-  if (typeof ident === 'string') {
-    try {
-      new Function(("var " + ident + "=_"));
-    } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
-    }
-  }
-}
-
-function checkExpression (exp, text, errors) {
-  try {
-    new Function(("return " + exp));
-  } catch (e) {
-    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-    if (keywordMatch) {
-      errors.push(
-        "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
-      );
-    } else {
-      errors.push(
-        "invalid expression: " + (e.message) + " in\n\n" +
-        "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
-      );
-    }
-  }
-}
-
-/*  */
-
-function createFunction (code, errors) {
-  try {
-    return new Function(code)
-  } catch (err) {
-    errors.push({ err: err, code: code });
-    return noop
-  }
-}
-
-function createCompileToFunctionFn (compile) {
-  var cache = Object.create(null);
-
-  return function compileToFunctions (
-    template,
-    options,
-    vm
-  ) {
-    options = extend({}, options);
-    var warn$$1 = options.warn || warn;
-    delete options.warn;
-
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
-      // detect possible CSP restriction
-      try {
-        new Function('return 1');
-      } catch (e) {
-        if (e.toString().match(/unsafe-eval|CSP/)) {
-          warn$$1(
-            'It seems you are using the standalone build of Vue.js in an ' +
-            'environment with Content Security Policy that prohibits unsafe-eval. ' +
-            'The template compiler cannot work in this environment. Consider ' +
-            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
-            'templates into render functions.'
-          );
-        }
-      }
-    }
-
-    // check cache
-    var key = options.delimiters
-      ? String(options.delimiters) + template
-      : template;
-    if (cache[key]) {
-      return cache[key]
-    }
-
-    // compile
-    var compiled = compile(template, options);
-
-    // check compilation errors/tips
-    if (process.env.NODE_ENV !== 'production') {
-      if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
-      }
-      if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
-      }
-    }
-
-    // turn code into functions
-    var res = {};
-    var fnGenErrors = [];
-    res.render = createFunction(compiled.render, fnGenErrors);
-    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
-      return createFunction(code, fnGenErrors)
-    });
-
-    // check function generation errors.
-    // this should only happen if there is a bug in the compiler itself.
-    // mostly for codegen development use
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
-      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
-        warn$$1(
-          "Failed to generate render function:\n\n" +
-          fnGenErrors.map(function (ref) {
-            var err = ref.err;
-            var code = ref.code;
-
-            return ((err.toString()) + " in\n\n" + code + "\n");
-        }).join('\n'),
-          vm
-        );
-      }
-    }
-
-    return (cache[key] = res)
-  }
-}
-
-/*  */
-
-function createCompilerCreator (baseCompile) {
-  return function createCompiler (baseOptions) {
-    function compile (
-      template,
-      options
-    ) {
-      var finalOptions = Object.create(baseOptions);
-      var errors = [];
-      var tips = [];
-      finalOptions.warn = function (msg, tip) {
-        (tip ? tips : errors).push(msg);
-      };
-
-      if (options) {
-        // merge custom modules
-        if (options.modules) {
-          finalOptions.modules =
-            (baseOptions.modules || []).concat(options.modules);
-        }
-        // merge custom directives
-        if (options.directives) {
-          finalOptions.directives = extend(
-            Object.create(baseOptions.directives || null),
-            options.directives
-          );
-        }
-        // copy other options
-        for (var key in options) {
-          if (key !== 'modules' && key !== 'directives') {
-            finalOptions[key] = options[key];
-          }
-        }
-      }
-
-      var compiled = baseCompile(template, finalOptions);
-      if (process.env.NODE_ENV !== 'production') {
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-  }
+  module.exports = require('./vue.common.dev.js')
 }
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diff --git a/dist/vue.common.prod.js b/dist/vue.common.prod.js
new file mode 100644
index 00000000000..67d44d3cc70
--- /dev/null
+++ b/dist/vue.common.prod.js
@@ -0,0 +1,6 @@
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o=0;o<t.transforms.length;o++)n=t.transforms[o](e,n);return n}return Wa(e,t)||"void 0"}function Ba(e,t){e.staticProcessed=!0;var n=t.pre;return e.pre&&(t.pre=e.pre),t.staticRenderFns.push("with(this){return "+Ha(e,t)+"}"),t.pre=n,"_m("+(t.staticRenderFns.length-1)+(e.staticInFor?",true":"")+")"}function Ua(e,t){if(e.onceProcessed=!0,e.if&&!e.ifProcessed)return Va(e,t);if(e.staticInFor){for(var n="",r=e.parent;r;){if(r.for){n=r.key;break}r=r.parent}return n?"_o("+Ha(e,t)+","+t.onceId+++","+n+")":Ha(e,t)}return Ba(e,t)}function Va(e,t,n,r){return e.ifProcessed=!0,function e(t,n,r,i){if(!t.length)return i||"_e()";var o=t.shift();return o.exp?"("+o.exp+")?"+a(o.block)+":"+e(t,n,r,i):""+a(o.block);function a(e){return r?r(e,n):e.once?Ua(e,n):Ha(e,n)}}(e.ifConditions.slice(),t,n,r)}function za(e,t,n,r){var i=e.for,o=e.alias,a=e.iterator1?","+e.iterator1:"",s=e.iterator2?","+e.iterator2:"";return e.forProcessed=!0,(r||"_l")+"(("+i+"),function("+o+a+s+"){return "+(n||Ha)(e,t)+"})"}function Ka(e,t){var n="{",r=function(e,t){var n=e.directives;if(!n)return;var r,i,o,a,s="directives:[",c=!1;for(r=0,i=n.length;r<i;r++){o=n[r],a=!0;var u=t.directives[o.name];u&&(a=!!u(e,o,t.warn)),a&&(c=!0,s+='{name:"'+o.name+'",rawName:"'+o.rawName+'"'+(o.value?",value:("+o.value+"),expression:"+JSON.stringify(o.value):"")+(o.arg?",arg:"+(o.isDynamicArg?o.arg:'"'+o.arg+'"'):"")+(o.modifiers?",modifiers:"+JSON.stringify(o.modifiers):"")+"},")}if(c)return s.slice(0,-1)+"]"}(e,t);r&&(n+=r+","),e.key&&(n+="key:"+e.key+","),e.ref&&(n+="ref:"+e.ref+","),e.refInFor&&(n+="refInFor:true,"),e.pre&&(n+="pre:true,"),e.component&&(n+='tag:"'+e.tag+'",');for(var i=0;i<t.dataGenFns.length;i++)n+=t.dataGenFns[i](e);if(e.attrs&&(n+="attrs:"+Xa(e.attrs)+","),e.props&&(n+="domProps:"+Xa(e.props)+","),e.events&&(n+=La(e.events,!1)+","),e.nativeEvents&&(n+=La(e.nativeEvents,!0)+","),e.slotTarget&&!e.slotScope&&(n+="slot:"+e.slotTarget+","),e.scopedSlots&&(n+=function(e,t,n){var r=e.for||Object.keys(t).some(function(e){var n=t[e];return n.slotTargetDynamic||n.if||n.for||Ja(n)}),i=!!e.if;if(!r)for(var o=e.parent;o;){if(o.slotScope&&o.slotScope!==ua||o.for){r=!0;break}o.if&&(i=!0),o=o.parent}var a=Object.keys(t).map(function(e){return qa(t[e],n)}).join(",");return"scopedSlots:_u(["+a+"]"+(r?",null,true":"")+(!r&&i?",null,false,"+function(e){var t=5381,n=e.length;for(;n;)t=33*t^e.charCodeAt(--n);return t>>>0}(a):"")+")"}(e,e.scopedSlots,t)+","),e.model&&(n+="model:{value:"+e.model.value+",callback:"+e.model.callback+",expression:"+e.model.expression+"},"),e.inlineTemplate){var o=function(e,t){var n=e.children[0];if(n&&1===n.type){var r=Ra(n,t.options);return"inlineTemplate:{render:function(){"+r.render+"},staticRenderFns:["+r.staticRenderFns.map(function(e){return"function(){"+e+"}"}).join(",")+"]}"}}(e,t);o&&(n+=o+",")}return n=n.replace(/,$/,"")+"}",e.dynamicAttrs&&(n="_b("+n+',"'+e.tag+'",'+Xa(e.dynamicAttrs)+")"),e.wrapData&&(n=e.wrapData(n)),e.wrapListeners&&(n=e.wrapListeners(n)),n}function Ja(e){return 1===e.type&&("slot"===e.tag||e.children.some(Ja))}function qa(e,t){var n=e.attrsMap["slot-scope"];if(e.if&&!e.ifProcessed&&!n)return Va(e,t,qa,"null");if(e.for&&!e.forProcessed)return za(e,t,qa);var r=e.slotScope===ua?"":String(e.slotScope),i="function("+r+"){return "+("template"===e.tag?e.if&&n?"("+e.if+")?"+(Wa(e,t)||"undefined")+":undefined":Wa(e,t)||"undefined":Ha(e,t))+"}",o=r?"":",proxy:true";return"{key:"+(e.slotTarget||'"default"')+",fn:"+i+o+"}"}function Wa(e,t,n,r,i){var o=e.children;if(o.length){var a=o[0];if(1===o.length&&a.for&&"template"!==a.tag&&"slot"!==a.tag){var s=n?t.maybeComponent(a)?",1":",0":"";return""+(r||Ha)(a,t)+s}var c=n?function(e,t){for(var n=0,r=0;r<e.length;r++){var i=e[r];if(1===i.type){if(Za(i)||i.ifConditions&&i.ifConditions.some(function(e){return Za(e.block)})){n=2;break}(t(i)||i.ifConditions&&i.ifConditions.some(function(e){return t(e.block)}))&&(n=1)}}return n}(o,t.maybeComponent):0,u=i||Ga;return"["+o.map(function(e){return u(e,t)}).join(",")+"]"+(c?","+c:"")}}function Za(e){return void 0!==e.for||"template"===e.tag||"slot"===e.tag}function Ga(e,t){return 1===e.type?Ha(e,t):3===e.type&&e.isComment?(r=e,"_e("+JSON.stringify(r.text)+")"):"_v("+(2===(n=e).type?n.expression:Ya(JSON.stringify(n.text)))+")";var n,r}function Xa(e){for(var t="",n="",r=0;r<e.length;r++){var i=e[r],o=Ya(i.value);i.dynamic?n+=i.name+","+o+",":t+='"'+i.name+'":'+o+","}return t="{"+t.slice(0,-1)+"}",n?"_d("+t+",["+n.slice(0,-1)+"])":t}function Ya(e){return e.replace(/\u2028/g,"\\u2028").replace(/\u2029/g,"\\u2029")}new RegExp("\\b"+"do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,super,throw,while,yield,delete,export,import,return,switch,default,extends,finally,continue,debugger,function,arguments".split(",").join("\\b|\\b")+"\\b");function Qa(e,t){try{return new Function(e)}catch(n){return t.push({err:n,code:e}),S}}function es(e){var t=Object.create(null);return function(n,r,i){(r=A({},r)).warn;delete r.warn;var o=r.delimiters?String(r.delimiters)+n:n;if(t[o])return t[o];var a=e(n,r),s={},c=[];return s.render=Qa(a.render,c),s.staticRenderFns=a.staticRenderFns.map(function(e){return Qa(e,c)}),t[o]=s}}var ts,ns,rs=(ts=function(e,t){var n=fa(e.trim(),t);!1!==t.optimize&&Aa(n,t);var r=Ra(n,t);return{ast:n,render:r.render,staticRenderFns:r.staticRenderFns}},function(e){function t(t,n){var r=Object.create(e),i=[],o=[];if(n)for(var a in n.modules&&(r.modules=(e.modules||[]).concat(n.modules)),n.directives&&(r.directives=A(Object.create(e.directives||null),n.directives)),n)"modules"!==a&&"directives"!==a&&(r[a]=n[a]);r.warn=function(e,t,n){(n?o:i).push(e)};var s=ts(t.trim(),r);return s.errors=i,s.tips=o,s}return{compile:t,compileToFunctions:es(t)}})(xa),is=(rs.compile,rs.compileToFunctions);function os(e){return(ns=ns||document.createElement("div")).innerHTML=e?'<a href="\n"/>':'<div a="\n"/>',ns.innerHTML.indexOf("&#10;")>0}var as=!!V&&os(!1),ss=!!V&&os(!0),cs=g(function(e){var t=Qn(e);return t&&t.innerHTML}),us=Cn.prototype.$mount;Cn.prototype.$mount=function(e,t){if((e=e&&Qn(e))===document.body||e===document.documentElement)return this;var n=this.$options;if(!n.render){var r=n.template;if(r)if("string"==typeof r)"#"===r.charAt(0)&&(r=cs(r));else{if(!r.nodeType)return this;r=r.innerHTML}else e&&(r=function(e){if(e.outerHTML)return e.outerHTML;var t=document.createElement("div");return t.appendChild(e.cloneNode(!0)),t.innerHTML}(e));if(r){var i=is(r,{outputSourceRange:!1,shouldDecodeNewlines:as,shouldDecodeNewlinesForHref:ss,delimiters:n.delimiters,comments:n.comments},this),o=i.render,a=i.staticRenderFns;n.render=o,n.staticRenderFns=a}}return us.call(this,e,t)},Cn.compile=is,module.exports=Cn;
\ No newline at end of file
diff --git a/dist/vue.esm.browser.js b/dist/vue.esm.browser.js
index d818935dbd5..989d362031b 100644
--- a/dist/vue.esm.browser.js
+++ b/dist/vue.esm.browser.js
@@ -1,14 +1,14 @@
 /*!
- * Vue.js v2.5.8
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 /*  */
 
 const emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 function isUndef (v) {
   return v === undefined || v === null
 }
@@ -26,12 +26,14 @@ function isFalse (v) {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 function isPrimitive (value) {
   return (
     typeof value === 'string' ||
     typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
     typeof value === 'boolean'
   )
 }
@@ -46,7 +48,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 const _toString = Object.prototype.toString;
 
@@ -74,19 +76,27 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 function toString (val) {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {
@@ -118,12 +128,12 @@ function makeMap (
 const isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 const isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -135,7 +145,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 const hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -177,9 +187,15 @@ const hyphenate = cached((str) => {
 });
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
-function bind (fn, ctx) {
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
   function boundFn (a) {
     const l = arguments.length;
     return l
@@ -188,11 +204,19 @@ function bind (fn, ctx) {
         : fn.call(ctx, a)
       : fn.call(ctx)
   }
-  // record original fn length
+
   boundFn._length = fn.length;
   return boundFn
 }
 
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+const bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
 /**
  * Convert an Array-like object to a real Array.
  */
@@ -229,10 +253,12 @@ function toObject (arr) {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -241,13 +267,15 @@ function noop (a, b, c) {}
  */
 const no = (a, b, c) => false;
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 const identity = (_) => _;
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 function genStaticKeys (modules) {
   return modules.reduce((keys, m) => {
@@ -271,6 +299,8 @@ function looseEqual (a, b) {
         return a.length === b.length && a.every((e, i) => {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         const keysA = Object.keys(a);
         const keysB = Object.keys(b);
@@ -292,6 +322,11 @@ function looseEqual (a, b) {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 function looseIndexOf (arr, val) {
   for (let i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) return i
@@ -331,15 +366,19 @@ const LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
    */
+  // $flow-disable-line
   optionMergeStrategies: Object.create(null),
 
   /**
@@ -380,6 +419,7 @@ var config = ({
   /**
    * Custom user key aliases for v-on
    */
+  // $flow-disable-line
   keyCodes: Object.create(null),
 
   /**
@@ -416,6 +456,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -424,6 +470,13 @@ var config = ({
 
 /*  */
 
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+const unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
 /**
  * Check if a string starts with $ or _
  */
@@ -447,7 +500,7 @@ function def (obj, key, val, enumerable) {
 /**
  * Parse simple path.
  */
-const bailRE = /[^\w.$]/;
+const bailRE = new RegExp(`[^${unicodeRegExp.source}.$_\\d]`);
 function parsePath (path) {
   if (bailRE.test(path)) {
     return
@@ -464,7 +517,6 @@ function parsePath (path) {
 
 /*  */
 
-
 // can we use __proto__?
 const hasProto = '__proto__' in {};
 
@@ -479,6 +531,8 @@ const isEdge = UA && UA.indexOf('edge/') > 0;
 const isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 const isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 const isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+const isPhantomJS = UA && /phantomjs/.test(UA);
+const isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 const nativeWatch = ({}).watch;
@@ -503,10 +557,10 @@ let _isServer;
 const isServerRendering = () => {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -590,7 +644,7 @@ let formatComponentName = (noop);
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     let name = options.name || options._componentTag;
     const file = options.__file;
     if (!name && file) {
@@ -650,7 +704,6 @@ let formatComponentName = (noop);
 
 /*  */
 
-
 let uid = 0;
 
 /**
@@ -684,25 +737,32 @@ class Dep {
   notify () {
     // stabilize the subscriber list first
     const subs = this.subs.slice();
+    if (!config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort((a, b) => a.id - b.id);
+    }
     for (let i = 0, l = subs.length; i < l; i++) {
       subs[i].update();
     }
   }
 }
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 const targetStack = [];
 
-function pushTarget (_target) {
-  if (Dep.target) targetStack.push(Dep.target);
-  Dep.target = _target;
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
 }
 
 function popTarget () {
-  Dep.target = targetStack.pop();
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
 }
 
 /*  */
@@ -733,7 +793,8 @@ class VNode {
   
    // real context vm for functional nodes
    // for SSR caching
-   // functioanl scope id support
+   // used to store functional render context for devtools
+   // functional scope id support
 
   constructor (
     tag,
@@ -752,9 +813,9 @@ class VNode {
     this.elm = elm;
     this.ns = undefined;
     this.context = context;
-    this.functionalContext = undefined;
-    this.functionalOptions = undefined;
-    this.functionalScopeId = undefined;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
     this.key = data && data.key;
     this.componentOptions = componentOptions;
     this.componentInstance = undefined;
@@ -792,50 +853,41 @@ function createTextVNode (val) {
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
 // on their elm reference.
-function cloneVNode (vnode, deep) {
-  const componentOptions = vnode.componentOptions;
+function cloneVNode (vnode) {
   const cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
-    componentOptions,
+    vnode.componentOptions,
     vnode.asyncFactory
   );
   cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
   cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
   return cloned
 }
 
-function cloneVNodes (vnodes, deep) {
-  const len = vnodes.length;
-  const res = new Array(len);
-  for (let i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 const arrayProto = Array.prototype;
-const arrayMethods = Object.create(arrayProto);[
+const arrayMethods = Object.create(arrayProto);
+
+const methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -843,8 +895,12 @@ const arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-]
-.forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   const original = arrayProto[method];
   def(arrayMethods, method, function mutator (...args) {
@@ -872,25 +928,25 @@ const arrayMethods = Object.create(arrayProto);[
 const arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-const observerState = {
-  shouldConvert: true
-};
+let shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 class Observer {
   
   
-   // number of vms that has this object as root $data
+   // number of vms that have this object as root $data
 
   constructor (value) {
     this.value = value;
@@ -898,10 +954,11 @@ class Observer {
     this.vmCount = 0;
     def(value, '__ob__', this);
     if (Array.isArray(value)) {
-      const augment = hasProto
-        ? protoAugment
-        : copyAugment;
-      augment(value, arrayMethods, arrayKeys);
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys);
+      }
       this.observeArray(value);
     } else {
       this.walk(value);
@@ -909,14 +966,14 @@ class Observer {
   }
 
   /**
-   * Walk through each property and convert them into
+   * Walk through all properties and convert them into
    * getter/setters. This method should only be called when
    * value type is Object.
    */
   walk (obj) {
     const keys = Object.keys(obj);
     for (let i = 0; i < keys.length; i++) {
-      defineReactive(obj, keys[i], obj[keys[i]]);
+      defineReactive$$1(obj, keys[i]);
     }
   }
 
@@ -933,17 +990,17 @@ class Observer {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -967,7 +1024,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -984,7 +1041,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -1001,6 +1058,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   const getter = property && property.get;
   const setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   let childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -1026,9 +1086,11 @@ function defineReactive (
         return
       }
       /* eslint-enable no-self-compare */
-      if ("development" !== 'production' && customSetter) {
+      if (customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) return
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1046,6 +1108,10 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(`Cannot set reactive property on undefined, null, or primitive value: ${(target)}`);
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1057,7 +1123,7 @@ function set (target, key, val) {
   }
   const ob = (target).__ob__;
   if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
+    warn(
       'Avoid adding reactive properties to a Vue instance or its root $data ' +
       'at runtime - declare it upfront in the data option.'
     );
@@ -1067,7 +1133,7 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
@@ -1076,13 +1142,17 @@ function set (target, key, val) {
  * Delete a property and trigger change if necessary.
  */
 function del (target, key) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(`Cannot delete reactive property on undefined, null, or primitive value: ${(target)}`);
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.splice(key, 1);
     return
   }
   const ob = (target).__ob__;
   if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
+    warn(
       'Avoid deleting properties on a Vue instance or its root $data ' +
       '- just set it to null.'
     );
@@ -1142,14 +1212,24 @@ const strats = config.optionMergeStrategies;
 function mergeData (to, from) {
   if (!from) return to
   let key, toVal, fromVal;
-  const keys = Object.keys(from);
+
+  const keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (let i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') continue
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1179,18 +1259,18 @@ function mergeDataOrFn (
     // it has to be a function to pass previous merges.
     return function mergedDataFn () {
       return mergeData(
-        typeof childVal === 'function' ? childVal.call(this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this) : parentVal
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
       )
     }
   } else {
     return function mergedInstanceDataFn () {
       // instance merge
       const instanceData = typeof childVal === 'function'
-        ? childVal.call(vm)
+        ? childVal.call(vm, vm)
         : childVal;
       const defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm)
+        ? parentVal.call(vm, vm)
         : parentVal;
       if (instanceData) {
         return mergeData(instanceData, defaultData)
@@ -1208,7 +1288,7 @@ strats.data = function (
 ) {
   if (!vm) {
     if (childVal && typeof childVal !== 'function') {
-      "development" !== 'production' && warn(
+      warn(
         'The "data" option should be a function ' +
         'that returns a per-instance value in component ' +
         'definitions.',
@@ -1230,13 +1310,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  const res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  const res = [];
+  for (let i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(hook => {
@@ -1258,7 +1351,7 @@ function mergeAssets (
 ) {
   const res = Object.create(parentVal || null);
   if (childVal) {
-    "development" !== 'production' && assertObjectType(key, childVal, vm);
+    assertObjectType(key, childVal, vm);
     return extend(res, childVal)
   } else {
     return res
@@ -1342,13 +1435,22 @@ const defaultStrat = function (parentVal, childVal) {
  */
 function checkComponents (options) {
   for (const key in options.components) {
-    const lower = key.toLowerCase();
-    if (isBuiltInTag(lower) || config.isReservedTag(lower)) {
-      warn(
-        'Do not use built-in or reserved HTML elements as component ' +
-        'id: ' + key
-      );
-    }
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(`^[a-zA-Z][\\-\\.0-9_${unicodeRegExp.source}]*$`).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
   }
 }
 
@@ -1395,6 +1497,7 @@ function normalizeProps (options, vm) {
  */
 function normalizeInject (options, vm) {
   const inject = options.inject;
+  if (!inject) return
   const normalized = options.inject = {};
   if (Array.isArray(inject)) {
     for (let i = 0; i < inject.length; i++) {
@@ -1407,7 +1510,7 @@ function normalizeInject (options, vm) {
         ? extend({ from: key }, val)
         : { from: val };
     }
-  } else if ("development" !== 'production' && inject) {
+  } else {
     warn(
       `Invalid value for option "inject": expected an Array or an Object, ` +
       `but got ${toRawType(inject)}.`,
@@ -1423,9 +1526,9 @@ function normalizeDirectives (options) {
   const dirs = options.directives;
   if (dirs) {
     for (const key in dirs) {
-      const def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+      const def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
       }
     }
   }
@@ -1461,15 +1564,22 @@ function mergeOptions (
   normalizeProps(child, vm);
   normalizeInject(child, vm);
   normalizeDirectives(child);
-  const extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (let i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (let i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
     }
   }
+
   const options = {};
   let key;
   for (key in parent) {
@@ -1511,7 +1621,7 @@ function resolveAsset (
   if (hasOwn(assets, PascalCaseId)) return assets[PascalCaseId]
   // fallback to prototype chain
   const res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if ("development" !== 'production' && warnMissing && !res) {
+  if (warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
       options
@@ -1522,6 +1632,8 @@ function resolveAsset (
 
 /*  */
 
+
+
 function validateProp (
   key,
   propOptions,
@@ -1531,12 +1643,18 @@ function validateProp (
   const prop = propOptions[key];
   const absent = !hasOwn(propsData, key);
   let value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  const booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      const stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
     }
   }
   // check default value
@@ -1544,10 +1662,10 @@ function validateProp (
     value = getPropDefaultValue(vm, prop, key);
     // since the default value is a fresh copy,
     // make sure to observe it.
-    const prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
+    const prevShouldObserve = shouldObserve;
+    toggleObserving(true);
     observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+    toggleObserving(prevShouldObserve);
   }
   {
     assertProp(prop, key, value, vm, absent);
@@ -1565,7 +1683,7 @@ function getPropDefaultValue (vm, prop, key) {
   }
   const def = prop.default;
   // warn against non-factory defaults for Object & Array
-  if ("development" !== 'production' && isObject(def)) {
+  if (isObject(def)) {
     warn(
       'Invalid default value for prop "' + key + '": ' +
       'Props with type Object/Array must use a factory function ' +
@@ -1616,16 +1734,16 @@ function assertProp (
       type = [type];
     }
     for (let i = 0; i < type.length && !valid; i++) {
-      const assertedType = assertType(value, type[i]);
+      const assertedType = assertType(value, type[i], vm);
       expectedTypes.push(assertedType.expectedType || '');
       valid = assertedType.valid;
     }
   }
-  if (!valid) {
+
+  const haveExpectedTypes = expectedTypes.some(t => t);
+  if (!valid && haveExpectedTypes) {
     warn(
-      `Invalid prop: type check failed for prop "${name}".` +
-      ` Expected ${expectedTypes.map(capitalize).join(', ')}` +
-      `, got ${toRawType(value)}.`,
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     );
     return
@@ -1641,9 +1759,9 @@ function assertProp (
   }
 }
 
-const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
 
-function assertType (value, type) {
+function assertType (value, type, vm) {
   let valid;
   const expectedType = getType(type);
   if (simpleCheckRE.test(expectedType)) {
@@ -1658,7 +1776,12 @@ function assertType (value, type) {
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value);
   } else {
-    valid = value instanceof type;
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
   }
   return {
     valid,
@@ -1666,49 +1789,124 @@ function assertType (value, type) {
   }
 }
 
+const functionTypeCheckRE = /^\s*function (\w+)/;
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  const match = fn && fn.toString().match(/^\s*function (\w+)/);
+  const match = fn && fn.toString().match(functionTypeCheckRE);
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (let i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (let i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  let message = `Invalid prop: type check failed for prop "${name}".` +
+    ` Expected ${expectedTypes.map(capitalize).join(', ')}`;
+  const expectedType = expectedTypes[0];
+  const receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += ` with value ${styleValue(value, expectedType)}`;
+  }
+  message += `, got ${receivedType} `;
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += `with value ${styleValue(value, receivedType)}.`;
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return `"${value}"`
+  } else if (type === 'Number') {
+    return `${Number(value)}`
+  } else {
+    return `${value}`
+  }
+}
+
+const EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(elem => value.toLowerCase() === elem)
+}
+
+function isBoolean (...args) {
+  return args.some(elem => elem.toLowerCase() === 'boolean')
 }
 
 /*  */
 
 function handleError (err, vm, info) {
-  if (vm) {
-    let cur = vm;
-    while ((cur = cur.$parent)) {
-      const hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (let i = 0; i < hooks.length; i++) {
-          try {
-            const capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) return
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      let cur = vm;
+      while ((cur = cur.$parent)) {
+        const hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (let i = 0; i < hooks.length; i++) {
+            try {
+              const capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) return
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  let res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(e => handleError(e, vm, info + ` (Promise/async)`));
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
   }
-  globalHandleError(err, vm, info);
+  return res
 }
 
 function globalHandleError (err, vm, info) {
@@ -1716,7 +1914,11 @@ function globalHandleError (err, vm, info) {
     try {
       return config.errorHandler.call(null, err, vm, info)
     } catch (e) {
-      logError(e, null, 'config.errorHandler');
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
     }
   }
   logError(err, vm, info);
@@ -1735,7 +1937,8 @@ function logError (err, vm, info) {
 }
 
 /*  */
-/* globals MessageChannel */
+
+let isUsingMicroTask = false;
 
 const callbacks = [];
 let pending = false;
@@ -1749,74 +1952,69 @@ function flushCallbacks () {
   }
 }
 
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-let microTimerFunc;
-let macroTimerFunc;
-let useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = () => {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  const channel = new MessageChannel();
-  const port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = () => {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = () => {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+let timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
 if (typeof Promise !== 'undefined' && isNative(Promise)) {
   const p = Promise.resolve();
-  microTimerFunc = () => {
+  timerFunc = () => {
     p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
     // it can get stuck in a weird state where callbacks are pushed into the
     // microtask queue but the queue isn't being flushed, until the browser
     // needs to do some other work, e.g. handle a timer. Therefore we can
     // "force" the microtask queue to be flushed by adding an empty timer.
     if (isIOS) setTimeout(noop);
   };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  let counter = 1;
+  const observer = new MutationObserver(flushCallbacks);
+  const textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = () => {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = () => {
+    setImmediate(flushCallbacks);
+  };
 } else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    const res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
+  // Fallback to setTimeout.
+  timerFunc = () => {
+    setTimeout(flushCallbacks, 0);
+  };
 }
 
 function nextTick (cb, ctx) {
@@ -1834,11 +2032,7 @@ function nextTick (cb, ctx) {
   });
   if (!pending) {
     pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
+    timerFunc();
   }
   // $flow-disable-line
   if (!cb && typeof Promise !== 'undefined') {
@@ -1868,7 +2062,7 @@ let measure;
       perf.measure(name, startTag, endTag);
       perf.clearMarks(startTag);
       perf.clearMarks(endTag);
-      perf.clearMeasures(name);
+      // perf.clearMeasures(name)
     };
   }
 }
@@ -1881,7 +2075,7 @@ let initProxy;
   const allowedGlobals = makeMap(
     'Infinity,undefined,NaN,isFinite,isNaN,' +
     'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
     'require' // for Webpack/Browserify
   );
 
@@ -1896,9 +2090,18 @@ let initProxy;
     );
   };
 
+  const warnReservedPrefix = (target, key) => {
+    warn(
+      `Property "${key}" must be accessed with "$data.${key}" because ` +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
   const hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    typeof Proxy !== 'undefined' && isNative(Proxy);
 
   if (hasProxy) {
     const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
@@ -1918,9 +2121,11 @@ let initProxy;
   const hasHandler = {
     has (target, key) {
       const has = key in target;
-      const isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
+      const isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
       if (!has && !isAllowed) {
-        warnNonPresent(target, key);
+        if (key in target.$data) warnReservedPrefix(target, key);
+        else warnNonPresent(target, key);
       }
       return has || !isAllowed
     }
@@ -1929,7 +2134,8 @@ let initProxy;
   const getHandler = {
     get (target, key) {
       if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
+        if (key in target.$data) warnReservedPrefix(target, key);
+        else warnNonPresent(target, key);
       }
       return target[key]
     }
@@ -1966,7 +2172,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   let i, keys;
   const isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
     return
   }
   if (val.__ob__) {
@@ -2003,17 +2209,17 @@ const normalizeEvent = cached((name) => {
   }
 });
 
-function createFnInvoker (fns) {
+function createFnInvoker (fns, vm) {
   function invoker () {
     const fns = invoker.fns;
     if (Array.isArray(fns)) {
       const cloned = fns.slice();
       for (let i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments);
+        invokeWithErrorHandling(cloned[i], null, arguments, vm, `v-on handler`);
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, `v-on handler`)
     }
   }
   invoker.fns = fns;
@@ -2025,23 +2231,27 @@ function updateListeners (
   oldOn,
   add,
   remove$$1,
+  createOnceHandler,
   vm
 ) {
-  let name, cur, old, event;
+  let name, def$$1, cur, old, event;
   for (name in on) {
-    cur = on[name];
+    def$$1 = cur = on[name];
     old = oldOn[name];
     event = normalizeEvent(name);
     if (isUndef(cur)) {
-      "development" !== 'production' && warn(
+      warn(
         `Invalid handler for event "${event.name}": got ` + String(cur),
         vm
       );
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
       }
-      add(event.name, cur, event.once, event.capture, event.passive);
+      add(event.name, cur, event.capture, event.passive, event.params);
     } else if (cur !== old) {
       old.fns = cur;
       on[name] = old;
@@ -2246,287 +2456,75 @@ function normalizeArrayChildren (children, nestedIndex) {
 
 /*  */
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
+function initProvide (vm) {
+  const provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
   }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
 }
 
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  const node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data, context, children, tag };
-  return node
+function initInjections (vm) {
+  const result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(key => {
+      /* istanbul ignore else */
+      {
+        defineReactive$$1(vm, key, result[key], () => {
+          warn(
+            `Avoid mutating an injected value directly since the changes will be ` +
+            `overwritten whenever the provided component re-renders. ` +
+            `injection being mutated: "${key}"`,
+            vm
+          );
+        });
+      }
+    });
+    toggleObserving(true);
+  }
 }
 
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    const result = Object.create(null);
+    const keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
 
-  if (isDef(factory.resolved)) {
-    return factory.resolved
+    for (let i = 0; i < keys.length; i++) {
+      const key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') continue
+      const provideKey = inject[key].from;
+      let source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          const provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else {
+          warn(`Injection "${key}" not found`, vm);
+        }
+      }
+    }
+    return result
   }
+}
 
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
+/*  */
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    const contexts = factory.contexts = [context];
-    let sync = true;
 
-    const forceRender = () => {
-      for (let i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    const resolve = once((res) => {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    const reject = once(reason => {
-      "development" !== 'production' && warn(
-        `Failed to resolve async component: ${String(factory)}` +
-        (reason ? `\nReason: ${reason}` : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    const res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(() => {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(() => {
-            if (isUndef(factory.resolved)) {
-              reject(
-                `timeout (${res.timeout}ms)`
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (let i = 0; i < children.length; i++) {
-      const c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  const listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-let target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  const hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    const vm = this;
-    if (Array.isArray(event)) {
-      for (let i = 0, l = event.length; i < l; i++) {
-        this.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    const vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    const vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (let i = 0, l = event.length; i < l; i++) {
-        this.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    const cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      let cb;
-      let i = cbs.length;
-      while (i--) {
-        cb = cbs[i];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    const vm = this;
-    {
-      const lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          `Event "${lowerCaseEvent}" is emitted in component ` +
-          `${formatComponentName(vm)} but the handler is registered for "${event}". ` +
-          `Note that HTML attributes are case-insensitive and you cannot use ` +
-          `v-on to listen to camelCase events when using in-DOM templates. ` +
-          `You should probably use "${hyphenate(event)}" instead of "${event}".`
-        );
-      }
-    }
-    let cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      const args = toArray(arguments, 1);
-      for (let i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, `event handler for "${event}"`);
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
 
 /**
  * Runtime helper for resolving raw children VNodes into a slot object.
@@ -2535,10 +2533,10 @@ function resolveSlots (
   children,
   context
 ) {
-  const slots = {};
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  const slots = {};
   for (let i = 0, l = children.length; i < l; i++) {
     const child = children[i];
     const data = child.data;
@@ -2548,13 +2546,13 @@ function resolveSlots (
     }
     // named slots should only be respected if the vnode was rendered in the
     // same context.
-    if ((child.context === context || child.functionalContext === context) &&
+    if ((child.context === context || child.fnContext === context) &&
       data && data.slot != null
     ) {
-      const name = child.data.slot;
+      const name = data.slot;
       const slot = (slots[name] || (slots[name] = []));
       if (child.tag === 'template') {
-        slot.push.apply(slot, child.children);
+        slot.push.apply(slot, child.children || []);
       } else {
         slot.push(child);
       }
@@ -2575,1927 +2573,2448 @@ function isWhitespace (node) {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (let i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
-    }
-  }
-  return res
-}
-
 /*  */
 
-let activeInstance = null;
-let isUpdatingChildComponent = false;
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
 
-function initLifecycle (vm) {
-  const options = vm.$options;
+/*  */
 
-  // locate first non-abstract parent
-  let parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  let res;
+  const hasNormalSlots = Object.keys(normalSlots).length > 0;
+  const isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  const key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (const key in slots) {
+      if (slots[key] && key[0] !== '$') {
+        res[key] = normalizeScopedSlot(normalSlots, key, slots[key]);
+      }
     }
-    parent.$children.push(vm);
   }
+  // expose normal slots on scopedSlots
+  for (const key in normalSlots) {
+    if (!(key in res)) {
+      res[key] = proxyNormalSlot(normalSlots, key);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
+function normalizeScopedSlot(normalSlots, key, fn) {
+  const normalized = function () {
+    let res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    let vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
 
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
+function proxyNormalSlot(slots, key) {
+  return () => slots[key]
 }
 
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    const vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    const prevEl = vm.$el;
-    const prevVnode = vm._vnode;
-    const prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
-
-  Vue.prototype.$forceUpdate = function () {
-    const vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
+/*  */
 
-  Vue.prototype.$destroy = function () {
-    const vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    const parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    let i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  let ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
     }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
     }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      const iterator = val[Symbol.iterator]();
+      let result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
     }
-  };
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
 }
 
-function mountComponent (
-  vm,
-  el,
-  hydrating
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
 ) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
+  const scopedSlotFn = this.$scopedSlots[name];
+  let nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
       }
+      props = extend(extend({}, bindObject), props);
     }
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  } else {
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
   }
-  callHook(vm, 'beforeMount');
-
-  let updateComponent;
-  /* istanbul ignore if */
-  if ("development" !== 'production' && config.performance && mark) {
-    updateComponent = () => {
-      const name = vm._name;
-      const id = vm._uid;
-      const startTag = `vue-perf-start:${id}`;
-      const endTag = `vue-perf-end:${id}`;
-
-      mark(startTag);
-      const vnode = vm._render();
-      mark(endTag);
-      measure(`vue ${name} render`, startTag, endTag);
 
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(`vue ${name} patch`, startTag, endTag);
-    };
+  const target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
   } else {
-    updateComponent = () => {
-      vm._update(vm._render(), hydrating);
-    };
+    return nodes
   }
+}
 
-  vm._watcher = new Watcher(vm, updateComponent, noop);
-  hydrating = false;
+/*  */
 
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
   }
-  return vm
 }
 
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
 ) {
-  {
-    isUpdatingChildComponent = true;
+  const mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
   }
+  return eventKeyCode === undefined
+}
 
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  const hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
+/*  */
 
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      let hash;
+      for (const key in value) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          const type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        const camelizedKey = camelize(key);
+        const hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
 
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
+          if (isSync) {
+            const on = data.on || (data.on = {});
+            on[`update:${key}`] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      }
+    }
   }
-  vm.$options._renderChildren = renderChildren;
+  return data
+}
 
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
-
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    const props = vm._props;
-    const propKeys = vm.$options._propKeys || [];
-    for (let i = 0; i < propKeys.length; i++) {
-      const key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
-
-  // update listeners
-  if (listeners) {
-    const oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+/*  */
 
-  {
-    isUpdatingChildComponent = false;
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  const cached = this._staticTrees || (this._staticTrees = []);
+  let tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
   }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, `__static__${index}`, false);
+  return tree
 }
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) return true
-  }
-  return false
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, `__once__${index}${key ? `_${key}` : ``}`, true);
+  return tree
 }
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (let i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (let i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], `${key}_${i}`, isOnce);
+      }
     }
-    callHook(vm, 'activated');
+  } else {
+    markStaticNode(tree, key, isOnce);
   }
 }
 
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (let i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      const on = data.on = data.on ? extend({}, data.on) : {};
+      for (const key in value) {
+        const existing = on[key];
+        const ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
     }
-    callHook(vm, 'deactivated');
   }
+  return data
 }
 
-function callHook (vm, hook) {
-  const handlers = vm.$options[hook];
-  if (handlers) {
-    for (let i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, `${hook} hook`);
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (let i = 0; i < fns.length; i++) {
+    const slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
       }
+      res[slot.key] = slot.fn;
     }
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
   }
+  return res
 }
 
 /*  */
 
+function bindDynamicKeys (baseObj, values) {
+  for (let i = 0; i < values.length; i += 2) {
+    const key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        `Invalid value for dynamic directive argument (expected string or null): ${key}`,
+        this
+      );
+    }
+  }
+  return baseObj
+}
 
-const MAX_UPDATE_COUNT = 100;
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
 
-const queue = [];
-const activatedChildren = [];
-let has = {};
-let circular = {};
-let waiting = false;
-let flushing = false;
-let index = 0;
+/*  */
 
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  {
-    circular = {};
-  }
-  waiting = flushing = false;
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
 }
 
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  let watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort((a, b) => a.id - b.id);
+/*  */
 
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if ("development" !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? `in watcher with expression "${watcher.expression}"`
-              : `in a component render function.`
-          ),
-          watcher.vm
-        );
-        break
-      }
-    }
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  const options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  let contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
   }
+  const isCompiled = isTrue(options._compiled);
+  const needNormalization = !isCompiled;
 
-  // keep copies of post queues before resetting state
-  const activatedQueue = activatedChildren.slice();
-  const updatedQueue = queue.slice();
-
-  resetSchedulerState();
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = () => {
+    if (!this.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this.$slots
+  };
 
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
 
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
   }
-}
 
-function callUpdatedHooks (queue) {
-  let i = queue.length;
-  while (i--) {
-    const watcher = queue[i];
-    const vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
+  if (options._scopeId) {
+    this._c = (a, b, c, d) => {
+      const vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = (a, b, c, d) => createElement(contextVm, a, b, c, d, needNormalization);
   }
 }
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  const options = Ctor.options;
+  const props = {};
+  const propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (const key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) mergeProps(props, data.attrs);
+    if (isDef(data.props)) mergeProps(props, data.props);
+  }
+
+  const renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  const vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    const vnodes = normalizeChildren(vnode) || [];
+    const res = new Array(vnodes.length);
+    for (let i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
 }
 
-function callActivatedHooks (queue) {
-  for (let i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  const clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
   }
+  return clone
 }
 
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  const id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      let i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
-      }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
-    }
+function mergeProps (to, from) {
+  for (const key in from) {
+    to[camelize(key)] = from[key];
   }
 }
 
 /*  */
 
-let uid$2 = 0;
+/*  */
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-class Watcher {
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
-  
+/*  */
 
-  constructor (
-    vm,
-    expOrFn,
-    cb,
-    options
-  ) {
-    this.vm = vm;
-    vm._watchers.push(this);
-    // options
-    if (options) {
-      this.deep = !!options.deep;
-      this.user = !!options.user;
-      this.lazy = !!options.lazy;
-      this.sync = !!options.sync;
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+const componentVNodeHooks = {
+  init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      const mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     } else {
-      this.deep = this.user = this.lazy = this.sync = false;
+      const child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
     }
-    this.cb = cb;
-    this.id = ++uid$2; // uid for batching
-    this.active = true;
-    this.dirty = this.lazy; // for lazy watchers
-    this.deps = [];
-    this.newDeps = [];
-    this.depIds = new _Set();
-    this.newDepIds = new _Set();
-    this.expression = expOrFn.toString();
-    // parse expression for getter
-    if (typeof expOrFn === 'function') {
-      this.getter = expOrFn;
-    } else {
-      this.getter = parsePath(expOrFn);
-      if (!this.getter) {
-        this.getter = function () {};
-        "development" !== 'production' && warn(
-          `Failed watching path: "${expOrFn}" ` +
-          'Watcher only accepts simple dot-delimited paths. ' +
-          'For full control, use a function instead.',
-          vm
-        );
+  },
+
+  prepatch (oldVnode, vnode) {
+    const options = vnode.componentOptions;
+    const child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert (vnode) {
+    const { context, componentInstance } = vnode;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
       }
     }
-    this.value = this.lazy
-      ? undefined
-      : this.get();
-  }
+  },
 
-  /**
-   * Evaluate the getter, and re-collect dependencies.
-   */
-  get () {
-    pushTarget(this);
-    let value;
-    const vm = this.vm;
-    try {
-      value = this.getter.call(vm, vm);
-    } catch (e) {
-      if (this.user) {
-        handleError(e, vm, `getter for watcher "${this.expression}"`);
+  destroy (vnode) {
+    const { componentInstance } = vnode;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
       } else {
-        throw e
-      }
-    } finally {
-      // "touch" every property so they are all tracked as
-      // dependencies for deep watching
-      if (this.deep) {
-        traverse(value);
+        deactivateChildComponent(componentInstance, true /* direct */);
       }
-      popTarget();
-      this.cleanupDeps();
     }
-    return value
   }
+};
 
-  /**
-   * Add a dependency to this directive.
-   */
-  addDep (dep) {
-    const id = dep.id;
-    if (!this.newDepIds.has(id)) {
-      this.newDepIds.add(id);
-      this.newDeps.push(dep);
-      if (!this.depIds.has(id)) {
-        dep.addSub(this);
-      }
-    }
+const hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
   }
 
-  /**
-   * Clean up for dependency collection.
-   */
-  cleanupDeps () {
-    let i = this.deps.length;
-    while (i--) {
-      const dep = this.deps[i];
-      if (!this.newDepIds.has(dep.id)) {
-        dep.removeSub(this);
-      }
-    }
-    let tmp = this.depIds;
-    this.depIds = this.newDepIds;
-    this.newDepIds = tmp;
-    this.newDepIds.clear();
-    tmp = this.deps;
-    this.deps = this.newDeps;
-    this.newDeps = tmp;
-    this.newDeps.length = 0;
+  const baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
   }
 
-  /**
-   * Subscriber interface.
-   * Will be called when a dependency changes.
-   */
-  update () {
-    /* istanbul ignore else */
-    if (this.lazy) {
-      this.dirty = true;
-    } else if (this.sync) {
-      this.run();
-    } else {
-      queueWatcher(this);
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(`Invalid Component definition: ${String(Ctor)}`, context);
     }
+    return
   }
 
-  /**
-   * Scheduler job interface.
-   * Will be called by the scheduler.
-   */
-  run () {
-    if (this.active) {
-      const value = this.get();
-      if (
-        value !== this.value ||
-        // Deep watchers and watchers on Object/Arrays should fire even
-        // when the value is the same, because the value may
-        // have mutated.
-        isObject(value) ||
-        this.deep
-      ) {
-        // set new value
-        const oldValue = this.value;
-        this.value = value;
-        if (this.user) {
-          try {
-            this.cb.call(this.vm, value, oldValue);
-          } catch (e) {
-            handleError(e, this.vm, `callback for watcher "${this.expression}"`);
-          }
-        } else {
-          this.cb.call(this.vm, value, oldValue);
-        }
-      }
+  // async component
+  let asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
     }
   }
 
-  /**
-   * Evaluate the value of the watcher.
-   * This only gets called for lazy watchers.
-   */
-  evaluate () {
-    this.value = this.get();
-    this.dirty = false;
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
   }
 
-  /**
-   * Depend on all deps collected by this watcher.
-   */
-  depend () {
-    let i = this.deps.length;
-    while (i--) {
-      this.deps[i].depend();
-    }
+  // extract props
+  const propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
   }
 
-  /**
-   * Remove self from all dependencies' subscriber list.
-   */
-  teardown () {
-    if (this.active) {
-      // remove self from vm's watcher list
-      // this is a somewhat expensive operation so we skip it
-      // if the vm is being destroyed.
-      if (!this.vm._isBeingDestroyed) {
-        remove(this.vm._watchers, this);
-      }
-      let i = this.deps.length;
-      while (i--) {
-        this.deps[i].removeSub(this);
-      }
-      this.active = false;
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  const listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    const slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
     }
   }
-}
 
-/*  */
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
 
-const sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
+  // return a placeholder vnode
+  const name = Ctor.options.name || tag;
+  const vnode = new VNode(
+    `vue-component-${Ctor.cid}${name ? `-${name}` : ''}`,
+    data, undefined, undefined, undefined, context,
+    { Ctor, propsData, listeners, tag, children },
+    asyncFactory
+  );
 
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
+  return vnode
 }
 
-function initState (vm) {
-  vm._watchers = [];
-  const opts = vm.$options;
-  if (opts.props) initProps(vm, opts.props);
-  if (opts.methods) initMethods(vm, opts.methods);
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) initComputed(vm, opts.computed);
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
+function createComponentInstanceForVnode (
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
+) {
+  const options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent
+  };
+  // check inline-template render functions
+  const inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
   }
+  return new vnode.componentOptions.Ctor(options)
 }
 
-function initProps (vm, propsOptions) {
-  const propsData = vm.$options.propsData || {};
-  const props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  const keys = vm.$options._propKeys = [];
-  const isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  for (const key in propsOptions) {
-    keys.push(key);
-    const value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    {
-      const hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          `"${hyphenatedKey}" is a reserved attribute and cannot be used as component prop.`,
-          vm
-        );
-      }
-      defineReactive(props, key, value, () => {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            `Avoid mutating a prop directly since the value will be ` +
-            `overwritten whenever the parent component re-renders. ` +
-            `Instead, use a data or computed property based on the prop's ` +
-            `value. Prop being mutated: "${key}"`,
-            vm
-          );
-        }
-      });
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, `_props`, key);
+function installComponentHooks (data) {
+  const hooks = data.hook || (data.hook = {});
+  for (let i = 0; i < hooksToMerge.length; i++) {
+    const key = hooksToMerge[i];
+    const existing = hooks[key];
+    const toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
     }
   }
-  observerState.shouldConvert = true;
 }
 
-function initData (vm) {
-  let data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    "development" !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  const keys = Object.keys(data);
-  const props = vm.$options.props;
-  const methods = vm.$options.methods;
-  let i = keys.length;
-  while (i--) {
-    const key = keys[i];
-    {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          `Method "${key}" has already been defined as a data property.`,
-          vm
-        );
-      }
-    }
-    if (props && hasOwn(props, key)) {
-      "development" !== 'production' && warn(
-        `The data property "${key}" is already declared as a prop. ` +
-        `Use prop default value instead.`,
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, `_data`, key);
-    }
-  }
-  // observe data
-  observe(data, true /* asRootData */);
-}
-
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, `data()`);
-    return {}
+function mergeHook$1 (f1, f2) {
+  const merged = (a, b) => {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  const prop = (options.model && options.model.prop) || 'value';
+  const event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  const on = data.on || (data.on = {});
+  const existing = on[event];
+  const callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
   }
 }
 
-const computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  const watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  const isSSR = isServerRendering();
-
-  for (const key in computed) {
-    const userDef = computed[key];
-    const getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if ("development" !== 'production' && getter == null) {
-      warn(
-        `Getter is missing for computed property "${key}".`,
-        vm
-      );
-    }
+/*  */
 
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
-    }
+const SIMPLE_NORMALIZE = 1;
+const ALWAYS_NORMALIZE = 2;
 
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else {
-      if (key in vm.$data) {
-        warn(`The computed property "${key}" is already defined in data.`, vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(`The computed property "${key}" is already defined as a prop.`, vm);
-      }
-    }
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
   }
+  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function defineComputed (
-  target,
-  key,
-  userDef
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
 ) {
-  const shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      `Avoid using observed data object as vnode data: ${JSON.stringify(data)}\n` +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
   }
-  if ("development" !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
       warn(
-        `Computed property "${key}" was assigned to but it has no setter.`,
-        this
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
       );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function createComputedGetter (key) {
-  return function computedGetter () {
-    const watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
     }
   }
-}
-
-function initMethods (vm, methods) {
-  const props = vm.$options.props;
-  for (const key in methods) {
-    {
-      if (methods[key] == null) {
-        warn(
-          `Method "${key}" has an undefined value in the component definition. ` +
-          `Did you reference the function correctly?`,
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          `Method "${key}" has already been defined as a prop.`,
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  let vnode, ns;
+  if (typeof tag === 'string') {
+    let Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
         warn(
-          `Method "${key}" conflicts with an existing Vue instance method. ` +
-          `Avoid defining component methods that start with _ or $.`
+          `The .native modifier for v-on is only valid on components but it was used on <${tag}>.`,
+          context
         );
       }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) applyNS(vnode, ns);
+    if (isDef(data)) registerDeepBindings(data);
+    return vnode
+  } else {
+    return createEmptyVNode()
   }
 }
 
-function initWatch (vm, watch) {
-  for (const key in watch) {
-    const handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (let i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (let i = 0, l = vnode.children.length; i < l; i++) {
+      const child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
       }
-    } else {
-      createWatcher(vm, key, handler);
     }
   }
 }
 
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
   }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
+  if (isObject(data.class)) {
+    traverse(data.class);
   }
-  return vm.$watch(keyOrFn, handler, options)
 }
 
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  const dataDef = {};
-  dataDef.get = function () { return this._data };
-  const propsDef = {};
-  propsDef.get = function () { return this._props };
-  {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn(`$props is readonly.`, this);
-    };
-  }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
-
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
+/*  */
 
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    const vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    const watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
-    }
-    return function unwatchFn () {
-      watcher.teardown();
-    }
-  };
-}
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  const options = vm.$options;
+  const parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  const renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = (a, b, c, d) => createElement(vm, a, b, c, d, false);
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = (a, b, c, d) => createElement(vm, a, b, c, d, true);
 
-/*  */
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  const parentData = parentVnode && parentVnode.data;
 
-function initProvide (vm) {
-  const provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
+  /* istanbul ignore else */
+  {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, () => {
+      !isUpdatingChildComponent && warn(`$attrs is readonly.`, vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, () => {
+      !isUpdatingChildComponent && warn(`$listeners is readonly.`, vm);
+    }, true);
   }
 }
 
-function initInjections (vm) {
-  const result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(key => {
-      /* istanbul ignore else */
-      {
-        defineReactive(vm, key, result[key], () => {
-          warn(
-            `Avoid mutating an injected value directly since the changes will be ` +
-            `overwritten whenever the provided component re-renders. ` +
-            `injection being mutated: "${key}"`,
-            vm
-          );
-        });
-      }
-    });
-    observerState.shouldConvert = true;
-  }
-}
+let currentRenderingInstance = null;
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    const result = Object.create(null);
-    const keys = hasSymbol
-        ? Reflect.ownKeys(inject).filter(key => {
-          /* istanbul ignore next */
-          return Object.getOwnPropertyDescriptor(inject, key).enumerable
-        })
-        : Object.keys(inject);
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
 
-    for (let i = 0; i < keys.length; i++) {
-      const key = keys[i];
-      const provideKey = inject[key].from;
-      let source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    const vm = this;
+    const { render, _parentVnode } = vm.$options;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    let vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, `render`);
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, `renderError`);
+          vnode = vm._vnode;
         }
-        source = source.$parent;
+      } else {
+        vnode = vm._vnode;
       }
-      if (!source) {
-        if ('default' in inject[key]) {
-          const provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else {
-          warn(`Injection "${key}" not found`, vm);
-        }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
       }
+      vnode = createEmptyVNode();
     }
-    return result
-  }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
 }
 
 /*  */
 
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  let ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
   }
-  return ret
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
 }
 
-/*  */
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  const node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data, context, children, tag };
+  return node
+}
 
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
+function resolveAsyncComponent (
+  factory,
+  baseCtor
 ) {
-  const scopedSlotFn = this.$scopedSlots[name];
-  let nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if ("development" !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    const slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if ("development" !== 'production' && slotNodes._rendered) {
-        warn(
-          `Duplicate presence of slot "${name}" found in the same render tree ` +
-          `- this will likely cause render errors.`,
-          this
-        );
-      }
-      slotNodes._rendered = true;
-    }
-    nodes = slotNodes || fallback;
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
   }
 
-  const target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
+  if (isDef(factory.resolved)) {
+    return factory.resolved
   }
-}
 
-/*  */
+  const owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
 
-/*  */
+  if (owner && !isDef(factory.owners)) {
+    const owners = factory.owners = [owner];
+    let sync = true;
+    let timerLoading = null;
+    let timerTimeout = null
 
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  const keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
+    ;(owner).$on('hook:destroyed', () => remove(owners, owner));
 
-/*  */
+    const forceRender = (renderCompleted) => {
+      for (let i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      "development" !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      let hash;
-      for (const key in value) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          const type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
         }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            const on = data.on || (data.on = {});
-            on[`update:${key}`] = function ($event) {
-              value[key] = $event;
-            };
-          }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
         }
       }
-    }
-  }
-  return data
-}
+    };
 
-/*  */
+    const resolve = once((res) => {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
 
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor,
-  isOnce
-) {
-  // render fns generated by compiler < 2.5.4 does not provide v-once
-  // information to runtime so be conservative
-  const isOldVersion = arguments.length < 3;
-  // if a static tree is generated by v-once, it is cached on the instance;
-  // otherwise it is purely static and can be cached on the shared options
-  // across all instances.
-  const renderFns = this.$options.staticRenderFns;
-  const cached = isOldVersion || isOnce
-    ? (this._staticTrees || (this._staticTrees = []))
-    : (renderFns.cached || (renderFns.cached = []));
-  let tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = renderFns[index].call(this._renderProxy, null, this);
-  markStatic(tree, `__static__${index}`, false);
-  return tree
-}
+    const reject = once(reason => {
+      warn(
+        `Failed to resolve async component: ${String(factory)}` +
+        (reason ? `\nReason: ${reason}` : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, `__once__${index}${key ? `_${key}` : ``}`, true);
-  return tree
-}
+    const res = factory(resolve, reject);
 
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (let i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], `${key}_${i}`, isOnce);
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(() => {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(() => {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                `timeout (${res.timeout}ms)`
+              );
+            }
+          }, res.timeout);
+        }
       }
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
-  }
-}
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
 }
 
 /*  */
 
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      "development" !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      const on = data.on = data.on ? extend({}, data.on) : {};
-      for (const key in value) {
-        const existing = on[key];
-        const ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (let i = 0; i < children.length; i++) {
+      const c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
       }
     }
   }
-  return data
 }
 
 /*  */
 
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
 /*  */
 
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  const options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = () => resolveSlots(children, parent);
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  const contextVm = Object.create(parent);
-  const isCompiled = isTrue(options._compiled);
-  const needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = (a, b, c, d) => {
-      const vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.functionalScopeId = options._scopeId;
-        vnode.functionalContext = parent;
-      }
-      return vnode
-    };
-  } else {
-    this._c = (a, b, c, d) => createElement(contextVm, a, b, c, d, needNormalization);
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  const listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
   }
 }
 
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  const options = Ctor.options;
-  const props = {};
-  const propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (const key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
-    }
-  } else {
-    if (isDef(data.attrs)) mergeProps(props, data.attrs);
-    if (isDef(data.props)) mergeProps(props, data.props);
-  }
+let target;
 
-  const renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
+function add (event, fn) {
+  target.$on(event, fn);
+}
 
-  const vnode = options.render.call(null, renderContext._c, renderContext);
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
 
-  if (vnode instanceof VNode) {
-    vnode.functionalContext = contextVm;
-    vnode.functionalOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
+function createOnceHandler (event, fn) {
+  const _target = target;
+  return function onceHandler () {
+    const res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
     }
   }
-
-  return vnode
 }
 
-function mergeProps (to, from) {
-  for (const key in from) {
-    to[camelize(key)] = from[key];
-  }
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
 }
 
-/*  */
-
-// hooks to be invoked on component VNodes during patch
-const componentVNodeHooks = {
-  init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      const child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      const mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+function eventsMixin (Vue) {
+  const hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    const vm = this;
+    if (Array.isArray(event)) {
+      for (let i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
     }
-  },
+    return vm
+  };
 
-  prepatch (oldVnode, vnode) {
-    const options = vnode.componentOptions;
-    const child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
+  Vue.prototype.$once = function (event, fn) {
+    const vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
 
-  insert (vnode) {
-    const { context, componentInstance } = vnode;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
+  Vue.prototype.$off = function (event, fn) {
+    const vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
     }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
+    // array of events
+    if (Array.isArray(event)) {
+      for (let i = 0, l = event.length; i < l; i++) {
+        vm.$off(event[i], fn);
       }
+      return vm
     }
-  },
-
-  destroy (vnode) {
-    const { componentInstance } = vnode;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
+    // specific event
+    const cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    let cb;
+    let i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
       }
     }
-  }
-};
-
-const hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  const baseCtor = context.$options._base;
-
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
+    return vm
+  };
 
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
+  Vue.prototype.$emit = function (event) {
+    const vm = this;
     {
-      warn(`Invalid Component definition: ${String(Ctor)}`, context);
+      const lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          `Event "${lowerCaseEvent}" is emitted in component ` +
+          `${formatComponentName(vm)} but the handler is registered for "${event}". ` +
+          `Note that HTML attributes are case-insensitive and you cannot use ` +
+          `v-on to listen to camelCase events when using in-DOM templates. ` +
+          `You should probably use "${hyphenate(event)}" instead of "${event}".`
+        );
+      }
     }
-    return
-  }
-
-  // async component
-  let asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+    let cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      const args = toArray(arguments, 1);
+      const info = `event handler for "${event}"`;
+      for (let i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
     }
-  }
-
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
+    return vm
+  };
+}
 
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
+/*  */
 
-  // extract props
-  const propsData = extractPropsFromVNodeData(data, Ctor, tag);
+let activeInstance = null;
+let isUpdatingChildComponent = false;
 
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
+function setActiveInstance(vm) {
+  const prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return () => {
+    activeInstance = prevActiveInstance;
   }
+}
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  const listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
-
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
+function initLifecycle (vm) {
+  const options = vm.$options;
 
-    // work around flow
-    const slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
+  // locate first non-abstract parent
+  let parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
     }
+    parent.$children.push(vm);
   }
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
 
-  // return a placeholder vnode
-  const name = Ctor.options.name || tag;
-  const vnode = new VNode(
-    `vue-component-${Ctor.cid}${name ? `-${name}` : ''}`,
-    data, undefined, undefined, undefined, context,
-    { Ctor, propsData, listeners, tag, children },
-    asyncFactory
-  );
-  return vnode
-}
+  vm.$children = [];
+  vm.$refs = {};
 
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  const vnodeComponentOptions = vnode.componentOptions;
-  const options = {
-    _isComponent: true,
-    parent,
-    propsData: vnodeComponentOptions.propsData,
-    _componentTag: vnodeComponentOptions.tag,
-    _parentVnode: vnode,
-    _parentListeners: vnodeComponentOptions.listeners,
-    _renderChildren: vnodeComponentOptions.children,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  const inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnodeComponentOptions.Ctor(options)
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
 }
 
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (let i = 0; i < hooksToMerge.length; i++) {
-    const key = hooksToMerge[i];
-    const fromParent = data.hook[key];
-    const ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    const vm = this;
+    const prevEl = vm.$el;
+    const prevVnode = vm._vnode;
+    const restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    const vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    const vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    const parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    let i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  let updateComponent;
+  /* istanbul ignore if */
+  if (config.performance && mark) {
+    updateComponent = () => {
+      const name = vm._name;
+      const id = vm._uid;
+      const startTag = `vue-perf-start:${id}`;
+      const endTag = `vue-perf-end:${id}`;
+
+      mark(startTag);
+      const vnode = vm._render();
+      mark(endTag);
+      measure(`vue ${name} render`, startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(`vue ${name} patch`, startTag, endTag);
+    };
+  } else {
+    updateComponent = () => {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  const newScopedSlots = parentVnode.data.scopedSlots;
+  const oldScopedSlots = vm.$scopedSlots;
+  const hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  const needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    const props = vm._props;
+    const propKeys = vm.$options._propKeys || [];
+    for (let i = 0; i < propKeys.length; i++) {
+      const key = propKeys[i];
+      const propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  const oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) return true
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (let i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (let i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  const handlers = vm.$options[hook];
+  const info = `${hook} hook`;
+  if (handlers) {
+    for (let i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+const MAX_UPDATE_COUNT = 100;
+
+const queue = [];
+const activatedChildren = [];
+let has = {};
+let circular = {};
+let waiting = false;
+let flushing = false;
+let index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+let currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+let getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  const performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = () => performance.now();
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  let watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort((a, b) => a.id - b.id);
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? `in watcher with expression "${watcher.expression}"`
+              : `in a component render function.`
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  const activatedQueue = activatedChildren.slice();
+  const updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  let i = queue.length;
+  while (i--) {
+    const watcher = queue[i];
+    const vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (let i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  const id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      let i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (!config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+let uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+class Watcher {
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+
+  constructor (
+    vm,
+    expOrFn,
+    cb,
+    options,
+    isRenderWatcher
+  ) {
+    this.vm = vm;
+    if (isRenderWatcher) {
+      vm._watcher = this;
+    }
+    vm._watchers.push(this);
+    // options
+    if (options) {
+      this.deep = !!options.deep;
+      this.user = !!options.user;
+      this.lazy = !!options.lazy;
+      this.sync = !!options.sync;
+      this.before = options.before;
+    } else {
+      this.deep = this.user = this.lazy = this.sync = false;
+    }
+    this.cb = cb;
+    this.id = ++uid$2; // uid for batching
+    this.active = true;
+    this.dirty = this.lazy; // for lazy watchers
+    this.deps = [];
+    this.newDeps = [];
+    this.depIds = new _Set();
+    this.newDepIds = new _Set();
+    this.expression = expOrFn.toString();
+    // parse expression for getter
+    if (typeof expOrFn === 'function') {
+      this.getter = expOrFn;
+    } else {
+      this.getter = parsePath(expOrFn);
+      if (!this.getter) {
+        this.getter = noop;
+        warn(
+          `Failed watching path: "${expOrFn}" ` +
+          'Watcher only accepts simple dot-delimited paths. ' +
+          'For full control, use a function instead.',
+          vm
+        );
+      }
+    }
+    this.value = this.lazy
+      ? undefined
+      : this.get();
+  }
+
+  /**
+   * Evaluate the getter, and re-collect dependencies.
+   */
+  get () {
+    pushTarget(this);
+    let value;
+    const vm = this.vm;
+    try {
+      value = this.getter.call(vm, vm);
+    } catch (e) {
+      if (this.user) {
+        handleError(e, vm, `getter for watcher "${this.expression}"`);
+      } else {
+        throw e
+      }
+    } finally {
+      // "touch" every property so they are all tracked as
+      // dependencies for deep watching
+      if (this.deep) {
+        traverse(value);
+      }
+      popTarget();
+      this.cleanupDeps();
+    }
+    return value
+  }
+
+  /**
+   * Add a dependency to this directive.
+   */
+  addDep (dep) {
+    const id = dep.id;
+    if (!this.newDepIds.has(id)) {
+      this.newDepIds.add(id);
+      this.newDeps.push(dep);
+      if (!this.depIds.has(id)) {
+        dep.addSub(this);
+      }
+    }
+  }
+
+  /**
+   * Clean up for dependency collection.
+   */
+  cleanupDeps () {
+    let i = this.deps.length;
+    while (i--) {
+      const dep = this.deps[i];
+      if (!this.newDepIds.has(dep.id)) {
+        dep.removeSub(this);
+      }
+    }
+    let tmp = this.depIds;
+    this.depIds = this.newDepIds;
+    this.newDepIds = tmp;
+    this.newDepIds.clear();
+    tmp = this.deps;
+    this.deps = this.newDeps;
+    this.newDeps = tmp;
+    this.newDeps.length = 0;
+  }
+
+  /**
+   * Subscriber interface.
+   * Will be called when a dependency changes.
+   */
+  update () {
+    /* istanbul ignore else */
+    if (this.lazy) {
+      this.dirty = true;
+    } else if (this.sync) {
+      this.run();
+    } else {
+      queueWatcher(this);
+    }
+  }
+
+  /**
+   * Scheduler job interface.
+   * Will be called by the scheduler.
+   */
+  run () {
+    if (this.active) {
+      const value = this.get();
+      if (
+        value !== this.value ||
+        // Deep watchers and watchers on Object/Arrays should fire even
+        // when the value is the same, because the value may
+        // have mutated.
+        isObject(value) ||
+        this.deep
+      ) {
+        // set new value
+        const oldValue = this.value;
+        this.value = value;
+        if (this.user) {
+          const info = `callback for watcher "${this.expression}"`;
+          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
+        } else {
+          this.cb.call(this.vm, value, oldValue);
+        }
+      }
+    }
+  }
 
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
+  /**
+   * Evaluate the value of the watcher.
+   * This only gets called for lazy watchers.
+   */
+  evaluate () {
+    this.value = this.get();
+    this.dirty = false;
   }
-}
 
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  const prop = (options.model && options.model.prop) || 'value';
-  const event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  const on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
+  /**
+   * Depend on all deps collected by this watcher.
+   */
+  depend () {
+    let i = this.deps.length;
+    while (i--) {
+      this.deps[i].depend();
+    }
+  }
+
+  /**
+   * Remove self from all dependencies' subscriber list.
+   */
+  teardown () {
+    if (this.active) {
+      // remove self from vm's watcher list
+      // this is a somewhat expensive operation so we skip it
+      // if the vm is being destroyed.
+      if (!this.vm._isBeingDestroyed) {
+        remove(this.vm._watchers, this);
+      }
+      let i = this.deps.length;
+      while (i--) {
+        this.deps[i].removeSub(this);
+      }
+      this.active = false;
+    }
   }
 }
 
 /*  */
 
-const SIMPLE_NORMALIZE = 1;
-const ALWAYS_NORMALIZE = 2;
+const sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
 
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  const opts = vm.$options;
+  if (opts.props) initProps(vm, opts.props);
+  if (opts.methods) initMethods(vm, opts.methods);
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
   }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
+  if (opts.computed) initComputed(vm, opts.computed);
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
   }
-  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    "development" !== 'production' && warn(
-      `Avoid using observed data object as vnode data: ${JSON.stringify(data)}\n` +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
+function initProps (vm, propsOptions) {
+  const propsData = vm.$options.propsData || {};
+  const props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  const keys = vm.$options._propKeys = [];
+  const isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
   }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
+  for (const key in propsOptions) {
+    keys.push(key);
+    const value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      const hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          `"${hyphenatedKey}" is a reserved attribute and cannot be used as component prop.`,
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, () => {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            `Avoid mutating a prop directly since the value will be ` +
+            `overwritten whenever the parent component re-renders. ` +
+            `Instead, use a data or computed property based on the prop's ` +
+            `value. Prop being mutated: "${key}"`,
+            vm
+          );
+        }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, `_props`, key);
+    }
   }
-  // warn against non-primitive key
-  if ("development" !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  let data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
     warn(
-      'Avoid using non-primitive value as key, ' +
-      'use string/number value instead.',
-      context
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
     );
   }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
+  // proxy data on instance
+  const keys = Object.keys(data);
+  const props = vm.$options.props;
+  const methods = vm.$options.methods;
+  let i = keys.length;
+  while (i--) {
+    const key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          `Method "${key}" has already been defined as a data property.`,
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      warn(
+        `The data property "${key}" is already declared as a prop. ` +
+        `Use prop default value instead.`,
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, `_data`, key);
+    }
   }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, `data()`);
+    return {}
+  } finally {
+    popTarget();
   }
-  let vnode, ns;
-  if (typeof tag === 'string') {
-    let Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
+}
+
+const computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  const watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  const isSSR = isServerRendering();
+
+  for (const key in computed) {
+    const userDef = computed[key];
+    const getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (getter == null) {
+      warn(
+        `Getter is missing for computed property "${key}".`,
+        vm
       );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
       );
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(`The computed property "${key}" is already defined in data.`, vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(`The computed property "${key}" is already defined as a prop.`, vm);
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(`The computed property "${key}" is already defined as a method.`, vm);
+      }
+    }
   }
-  if (isDef(vnode)) {
-    if (ns) applyNS(vnode, ns);
-    return vnode
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  const shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
   } else {
-    return createEmptyVNode()
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        `Computed property "${key}" was assigned to but it has no setter.`,
+        this
+      );
+    };
   }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
 }
 
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (let i = 0, l = vnode.children.length; i < l; i++) {
-      const child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
+function createComputedGetter (key) {
+  return function computedGetter () {
+    const watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
       }
+      return watcher.value
     }
   }
 }
 
-/*  */
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
 
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  const options = vm.$options;
-  const parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  const renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = (a, b, c, d) => createElement(vm, a, b, c, d, false);
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = (a, b, c, d) => createElement(vm, a, b, c, d, true);
+function initMethods (vm, methods) {
+  const props = vm.$options.props;
+  for (const key in methods) {
+    {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          `Method "${key}" has type "${typeof methods[key]}" in the component definition. ` +
+          `Did you reference the function correctly?`,
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          `Method "${key}" has already been defined as a prop.`,
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          `Method "${key}" conflicts with an existing Vue instance method. ` +
+          `Avoid defining component methods that start with _ or $.`
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
 
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  const parentData = parentVnode && parentVnode.data;
+function initWatch (vm, watch) {
+  for (const key in watch) {
+    const handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (let i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
 
-  /* istanbul ignore else */
-  {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, () => {
-      !isUpdatingChildComponent && warn(`$attrs is readonly.`, vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, () => {
-      !isUpdatingChildComponent && warn(`$listeners is readonly.`, vm);
-    }, true);
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
   }
+  return vm.$watch(expOrFn, handler, options)
 }
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  const dataDef = {};
+  dataDef.get = function () { return this._data };
+  const propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn(`$props is readonly.`, this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
 
-  Vue.prototype._render = function () {
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
     const vm = this;
-    const { render, _parentVnode } = vm.$options;
-
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (const key in vm.$slots) {
-        const slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
     }
-
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    let vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, `render`);
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, `renderError`);
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      }
+    options = options || {};
+    options.user = true;
+    const watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      const info = `callback for immediate watcher "${watcher.expression}"`;
+      pushTarget();
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+      popTarget();
     }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if ("development" !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
+    return function unwatchFn () {
+      watcher.teardown();
     }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
   };
 }
 
 /*  */
 
-let uid$1 = 0;
+let uid$3 = 0;
 
 function initMixin (Vue) {
   Vue.prototype._init = function (options) {
     const vm = this;
     // a uid
-    vm._uid = uid$1++;
+    vm._uid = uid$3++;
 
     let startTag, endTag;
     /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
+    if (config.performance && mark) {
       startTag = `vue-perf-start:${vm._uid}`;
       endTag = `vue-perf-end:${vm._uid}`;
       mark(startTag);
@@ -4532,7 +5051,7 @@ function initMixin (Vue) {
     callHook(vm, 'created');
 
     /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
+    if (config.performance && mark) {
       vm._name = formatComponentName(vm, false);
       mark(endTag);
       measure(`vue ${vm._name} init`, startTag, endTag);
@@ -4547,14 +5066,16 @@ function initMixin (Vue) {
 function initInternalComponent (vm, options) {
   const opts = vm.$options = Object.create(vm.constructor.options);
   // doing this because it's faster than dynamic enumeration.
+  const parentVnode = options._parentVnode;
   opts.parent = options.parent;
-  opts.propsData = options.propsData;
-  opts._parentVnode = options._parentVnode;
-  opts._parentListeners = options._parentListeners;
-  opts._renderChildren = options._renderChildren;
-  opts._componentTag = options._componentTag;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
+  opts._parentVnode = parentVnode;
+
+  const vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
   if (options.render) {
     opts.render = options.render;
     opts.staticRenderFns = options.staticRenderFns;
@@ -4588,50 +5109,29 @@ function resolveConstructorOptions (Ctor) {
 function resolveModifiedOptions (Ctor) {
   let modified;
   const latest = Ctor.options;
-  const extended = Ctor.extendOptions;
   const sealed = Ctor.sealedOptions;
   for (const key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) modified = {};
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+      modified[key] = latest[key];
     }
   }
   return modified
 }
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    const res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (let i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
-  if ("development" !== 'production' &&
-    !(this instanceof Vue$3)
+function Vue (options) {
+  if (!(this instanceof Vue)
   ) {
     warn('Vue is a constructor and should be called with the `new` keyword');
   }
   this._init(options);
 }
 
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
 
 /*  */
 
@@ -4688,14 +5188,8 @@ function initExtend (Vue) {
     }
 
     const name = extendOptions.name || Super.options.name;
-    {
-      if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-        warn(
-          'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characters and the hyphen, ' +
-          'and must start with a letter.'
-        );
-      }
+    if (name) {
+      validateComponentName(name);
     }
 
     const Sub = function VueComponent (options) {
@@ -4777,13 +5271,8 @@ function initAssetRegisters (Vue) {
         return this.options[type + 's'][id]
       } else {
         /* istanbul ignore if */
-        {
-          if (type === 'component' && config.isReservedTag(id)) {
-            warn(
-              'Do not use built-in or reserved HTML elements as component ' +
-              'id: ' + id
-            );
-          }
+        if (type === 'component') {
+          validateComponentName(id);
         }
         if (type === 'component' && isPlainObject(definition)) {
           definition.name = definition.name || id;
@@ -4801,6 +5290,10 @@ function initAssetRegisters (Vue) {
 
 /*  */
 
+
+
+
+
 function getComponentName (opts) {
   return opts && (opts.Ctor.options.name || opts.tag)
 }
@@ -4820,9 +5313,9 @@ function matches (pattern, name) {
 function pruneCache (keepAliveInstance, filter) {
   const { cache, keys, _vnode } = keepAliveInstance;
   for (const key in cache) {
-    const cachedNode = cache[key];
-    if (cachedNode) {
-      const name = getComponentName(cachedNode.componentOptions);
+    const entry = cache[key];
+    if (entry) {
+      const name = entry.name;
       if (name && !filter(name)) {
         pruneCacheEntry(cache, key, keys, _vnode);
       }
@@ -4836,9 +5329,9 @@ function pruneCacheEntry (
   keys,
   current
 ) {
-  const cached$$1 = cache[key];
-  if (cached$$1 && cached$$1 !== current) {
-    cached$$1.componentInstance.$destroy();
+  const entry = cache[key];
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy();
   }
   cache[key] = null;
   remove(keys, key);
@@ -4856,6 +5349,26 @@ var KeepAlive = {
     max: [String, Number]
   },
 
+  methods: {
+    cacheVNode() {
+      const { cache, keys, vnodeToCache, keyToCache } = this;
+      if (vnodeToCache) {
+        const { tag, componentInstance, componentOptions } = vnodeToCache;
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag,
+          componentInstance,
+        };
+        keys.push(keyToCache);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+        this.vnodeToCache = null;
+      }
+    }
+  },
+
   created () {
     this.cache = Object.create(null);
     this.keys = [];
@@ -4867,13 +5380,18 @@ var KeepAlive = {
     }
   },
 
-  watch: {
-    include (val) {
+  mounted () {
+    this.cacheVNode();
+    this.$watch('include', val => {
       pruneCache(this, name => matches(val, name));
-    },
-    exclude (val) {
+    });
+    this.$watch('exclude', val => {
       pruneCache(this, name => !matches(val, name));
-    }
+    });
+  },
+
+  updated () {
+    this.cacheVNode();
   },
 
   render () {
@@ -4905,12 +5423,9 @@ var KeepAlive = {
         remove(keys, key);
         keys.push(key);
       } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
+        // delay setting the cache until update
+        this.vnodeToCache = vnode;
+        this.keyToCache = key;
       }
 
       vnode.data.keepAlive = true;
@@ -4945,13 +5460,19 @@ function initGlobalAPI (Vue) {
     warn,
     extend,
     mergeOptions,
-    defineReactive
+    defineReactive: defineReactive$$1
   };
 
   Vue.set = set;
   Vue.delete = del;
   Vue.nextTick = nextTick;
 
+  // 2.6 explicit observable API
+  Vue.observable = (obj) => {
+    observe(obj);
+    return obj
+  };
+
   Vue.options = Object.create(null);
   ASSET_TYPES.forEach(type => {
     Vue.options[type + 's'] = Object.create(null);
@@ -4969,20 +5490,25 @@ function initGlobalAPI (Vue) {
   initAssetRegisters(Vue);
 }
 
-initGlobalAPI(Vue$3);
+initGlobalAPI(Vue);
 
-Object.defineProperty(Vue$3.prototype, '$isServer', {
+Object.defineProperty(Vue.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
+Object.defineProperty(Vue.prototype, '$ssrContext', {
   get () {
     /* istanbul ignore next */
     return this.$vnode && this.$vnode.ssrContext
   }
 });
 
-Vue$3.version = '2.5.8';
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.14';
 
 /*  */
 
@@ -5003,12 +5529,23 @@ const mustUseProp = (tag, type, attr) => {
 
 const isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
+const isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+const convertEnumeratedValue = (key, value) => {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
 const isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 );
 
@@ -5034,12 +5571,12 @@ function genClassForVnode (vnode) {
   let childNode = vnode;
   while (isDef(childNode.componentInstance)) {
     childNode = childNode.componentInstance._vnode;
-    if (childNode.data) {
+    if (childNode && childNode.data) {
       data = mergeClassData(childNode.data, data);
     }
   }
   while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode.data) {
+    if (parentNode && parentNode.data) {
       data = mergeClassData(data, parentNode.data);
     }
   }
@@ -5132,7 +5669,7 @@ const isHTMLTag = makeMap(
 // contain child elements.
 const isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 );
@@ -5191,7 +5728,7 @@ function query (el) {
   if (typeof el === 'string') {
     const selected = document.querySelector(el);
     if (!selected) {
-      "development" !== 'production' && warn(
+      warn(
         'Cannot find element: ' + el
       );
       return document.createElement('div')
@@ -5256,24 +5793,23 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
 }
 
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
 });
 
 /*  */
@@ -5295,7 +5831,7 @@ var ref = {
 
 function registerRef (vnode, isRemoval) {
   const key = vnode.data.ref;
-  if (!key) return
+  if (!isDef(key)) return
 
   const vm = vnode.context;
   const ref = vnode.componentInstance || vnode.elm;
@@ -5338,7 +5874,8 @@ const hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
 
 function sameVnode (a, b) {
   return (
-    a.key === b.key && (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
       (
         a.tag === b.tag &&
         a.isComment === b.isComment &&
@@ -5346,7 +5883,6 @@ function sameVnode (a, b) {
         sameInputType(a, b)
       ) || (
         isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
         isUndef(b.asyncFactory.error)
       )
     )
@@ -5391,13 +5927,13 @@ function createPatchFunction (backend) {
   }
 
   function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
         removeNode(childElm);
       }
     }
-    remove.listeners = listeners;
-    return remove
+    remove$$1.listeners = listeners;
+    return remove$$1
   }
 
   function removeNode (el) {
@@ -5425,7 +5961,25 @@ function createPatchFunction (backend) {
   }
 
   let creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     vnode.isRootInsert = !nested; // for transition enter check
     if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
       return
@@ -5448,6 +6002,7 @@ function createPatchFunction (backend) {
           );
         }
       }
+
       vnode.elm = vnode.ns
         ? nodeOps.createElementNS(vnode.ns, tag)
         : nodeOps.createElement(tag, vnode);
@@ -5462,7 +6017,7 @@ function createPatchFunction (backend) {
         insert(parentElm, vnode.elm, refElm);
       }
 
-      if ("development" !== 'production' && data && data.pre) {
+      if (data && data.pre) {
         creatingElmInVPre--;
       }
     } else if (isTrue(vnode.isComment)) {
@@ -5479,7 +6034,7 @@ function createPatchFunction (backend) {
     if (isDef(i)) {
       const isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
       if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
+        i(vnode, false /* hydrating */);
       }
       // after calling the init hook, if the vnode is a child component
       // it should've created a child instance and mounted it. the child
@@ -5487,6 +6042,7 @@ function createPatchFunction (backend) {
       // in that case we can just return the element and be done.
       if (isDef(vnode.componentInstance)) {
         initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
         if (isTrue(isReactivated)) {
           reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
         }
@@ -5538,7 +6094,7 @@ function createPatchFunction (backend) {
   function insert (parent, elm, ref$$1) {
     if (isDef(parent)) {
       if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
           nodeOps.insertBefore(parent, elm, ref$$1);
         }
       } else {
@@ -5549,11 +6105,14 @@ function createPatchFunction (backend) {
 
   function createChildren (vnode, children, insertedVnodeQueue) {
     if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
       for (let i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
       }
     } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(vnode.text));
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
     }
   }
 
@@ -5580,13 +6139,13 @@ function createPatchFunction (backend) {
   // of going through the normal attribute patching process.
   function setScope (vnode) {
     let i;
-    if (isDef(i = vnode.functionalScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
     } else {
       let ancestor = vnode;
       while (ancestor) {
         if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
+          nodeOps.setStyleScope(vnode.elm, i);
         }
         ancestor = ancestor.parent;
       }
@@ -5594,16 +6153,16 @@ function createPatchFunction (backend) {
     // for slot content they should also get the scopeId from the host instance.
     if (isDef(i = activeInstance) &&
       i !== vnode.context &&
-      i !== vnode.functionalContext &&
+      i !== vnode.fnContext &&
       isDef(i = i.$options._scopeId)
     ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     }
   }
 
   function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
     for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
     }
   }
 
@@ -5621,7 +6180,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+  function removeVnodes (vnodes, startIdx, endIdx) {
     for (; startIdx <= endIdx; ++startIdx) {
       const ch = vnodes[startIdx];
       if (isDef(ch)) {
@@ -5680,26 +6239,30 @@ function createPatchFunction (backend) {
     // during leaving transitions
     const canMove = !removeOnly;
 
+    {
+      checkDuplicateKeys(newCh);
+    }
+
     while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
       if (isUndef(oldStartVnode)) {
         oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
       } else if (isUndef(oldEndVnode)) {
         oldEndVnode = oldCh[--oldEndIdx];
       } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         oldStartVnode = oldCh[++oldStartIdx];
         newStartVnode = newCh[++newStartIdx];
       } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         oldEndVnode = oldCh[--oldEndIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
         oldStartVnode = oldCh[++oldStartIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
         oldEndVnode = oldCh[--oldEndIdx];
         newStartVnode = newCh[++newStartIdx];
@@ -5709,23 +6272,16 @@ function createPatchFunction (backend) {
           ? oldKeyToIdx[newStartVnode.key]
           : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
         if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
         } else {
           vnodeToMove = oldCh[idxInOld];
-          /* istanbul ignore if */
-          if ("development" !== 'production' && !vnodeToMove) {
-            warn(
-              'It seems there are duplicate keys that is causing an update error. ' +
-              'Make sure each v-for item has a unique key.'
-            );
-          }
           if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
           } else {
             // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
           }
         }
         newStartVnode = newCh[++newStartIdx];
@@ -5735,7 +6291,25 @@ function createPatchFunction (backend) {
       refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
       addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
     } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    const seenKeys = {};
+    for (let i = 0; i < children.length; i++) {
+      const vnode = children[i];
+      const key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            `Duplicate keys detected: '${key}'. This may cause an update error.`,
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
     }
   }
 
@@ -5746,11 +6320,23 @@ function createPatchFunction (backend) {
     }
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
     if (oldVnode === vnode) {
       return
     }
 
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     const elm = vnode.elm = oldVnode.elm;
 
     if (isTrue(oldVnode.isAsyncPlaceholder)) {
@@ -5791,10 +6377,13 @@ function createPatchFunction (backend) {
       if (isDef(oldCh) && isDef(ch)) {
         if (oldCh !== ch) updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly);
       } else if (isDef(ch)) {
+        {
+          checkDuplicateKeys(ch);
+        }
         if (isDef(oldVnode.text)) nodeOps.setTextContent(elm, '');
         addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
       } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
+        removeVnodes(oldCh, 0, oldCh.length - 1);
       } else if (isDef(oldVnode.text)) {
         nodeOps.setTextContent(elm, '');
       }
@@ -5860,8 +6449,7 @@ function createPatchFunction (backend) {
           if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
             if (i !== elm.innerHTML) {
               /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
+              if (typeof console !== 'undefined' &&
                 !hydrationBailed
               ) {
                 hydrationBailed = true;
@@ -5886,8 +6474,7 @@ function createPatchFunction (backend) {
             // longer than the virtual children list.
             if (!childrenMatch || childNode) {
               /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
+              if (typeof console !== 'undefined' &&
                 !hydrationBailed
               ) {
                 hydrationBailed = true;
@@ -5930,7 +6517,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
     if (isUndef(vnode)) {
       if (isDef(oldVnode)) invokeDestroyHook(oldVnode);
       return
@@ -5942,12 +6529,12 @@ function createPatchFunction (backend) {
     if (isUndef(oldVnode)) {
       // empty mount (likely as component), create new root element
       isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
+      createElm(vnode, insertedVnodeQueue);
     } else {
       const isRealElement = isDef(oldVnode.nodeType);
       if (!isRealElement && sameVnode(oldVnode, vnode)) {
         // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
       } else {
         if (isRealElement) {
           // mounting to a real element
@@ -6023,7 +6610,7 @@ function createPatchFunction (backend) {
 
         // destroy old node
         if (isDef(parentElm)) {
-          removeVnodes(parentElm, [oldVnode], 0, 0);
+          removeVnodes([oldVnode], 0, 0);
         } else if (isDef(oldVnode.tag)) {
           invokeDestroyHook(oldVnode);
         }
@@ -6073,6 +6660,7 @@ function _update (oldVnode, vnode) {
     } else {
       // existing directive, update
       dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
       callHook$1(dir, 'update', vnode, oldVnode);
       if (dir.def && dir.def.componentUpdated) {
         dirsWithPostpatch.push(dir);
@@ -6119,17 +6707,20 @@ function normalizeDirectives$1 (
 ) {
   const res = Object.create(null);
   if (!dirs) {
+    // $flow-disable-line
     return res
   }
   let i, dir;
   for (i = 0; i < dirs.length; i++) {
     dir = dirs[i];
     if (!dir.modifiers) {
+      // $flow-disable-line
       dir.modifiers = emptyModifiers;
     }
     res[getRawDirName(dir)] = dir;
     dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
   }
+  // $flow-disable-line
   return res
 }
 
@@ -6176,13 +6767,13 @@ function updateAttrs (oldVnode, vnode) {
     cur = attrs[key];
     old = oldAttrs[key];
     if (old !== cur) {
-      setAttr(elm, key, cur);
+      setAttr(elm, key, cur, vnode.data.pre);
     }
   }
   // #4391: in IE9, setting type can reset value for input[type=radio]
   // #6666: IE/Edge forces progress value down to 1 before setting a max
   /* istanbul ignore if */
-  if ((isIE9 || isEdge) && attrs.value !== oldAttrs.value) {
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
     setAttr(elm, 'value', attrs.value);
   }
   for (key in oldAttrs) {
@@ -6196,8 +6787,10 @@ function updateAttrs (oldVnode, vnode) {
   }
 }
 
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
+function setAttr (el, key, value, isInPre) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
     // set attribute for blank value
     // e.g. <option disabled>Select one</option>
     if (isFalsyAttrValue(value)) {
@@ -6211,7 +6804,7 @@ function setAttr (el, key, value) {
       el.setAttribute(key, value);
     }
   } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
+    el.setAttribute(key, convertEnumeratedValue(key, value));
   } else if (isXlink(key)) {
     if (isFalsyAttrValue(value)) {
       el.removeAttributeNS(xlinkNS, getXlinkProp(key));
@@ -6219,11 +6812,32 @@ function setAttr (el, key, value) {
       el.setAttributeNS(xlinkNS, key, value);
     }
   } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      el.setAttribute(key, value);
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      const blocker = e => {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
     }
+    el.setAttribute(key, value);
   }
 }
 
@@ -6364,15 +6978,19 @@ function wrapFilter (exp, filter) {
   } else {
     const name = filter.slice(0, i);
     const args = filter.slice(i + 1);
-    return `_f("${name}")(${exp},${args}`
+    return `_f("${name}")(${exp}${args !== ')' ? ',' + args : args}`
   }
 }
 
 /*  */
 
-function baseWarn (msg) {
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
   console.error(`[Vue compiler]: ${msg}`);
 }
+/* eslint-enable no-unused-vars */
 
 function pluckModuleFunction (
   modules,
@@ -6383,12 +7001,23 @@ function pluckModuleFunction (
     : []
 }
 
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name, value });
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name, value, dynamic }, range));
+  el.plain = false;
 }
 
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name, value });
+function addAttr (el, name, value, range, dynamic) {
+  const attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name, value, dynamic }, range));
+  el.plain = false;
+}
+
+// add a raw attr (use this in preTransforms)
+function addRawAttr (el, name, value, range) {
+  el.attrsMap[name] = value;
+  el.attrsList.push(rangeSetItem({ name, value }, range));
 }
 
 function addDirective (
@@ -6397,9 +7026,25 @@ function addDirective (
   rawName,
   value,
   arg,
-  modifiers
+  isDynamicArg,
+  modifiers,
+  range
 ) {
-  (el.directives || (el.directives = [])).push({ name, rawName, value, arg, modifiers });
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers
+  }, range));
+  el.plain = false;
+}
+
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? `_p(${name},"${symbol}")`
+    : symbol + name // mark the event as captured
 }
 
 function addHandler (
@@ -6408,46 +7053,55 @@ function addHandler (
   value,
   modifiers,
   important,
-  warn
+  warn,
+  range,
+  dynamic
 ) {
   modifiers = modifiers || emptyObject;
   // warn prevent and passive modifier
   /* istanbul ignore if */
   if (
-    "development" !== 'production' && warn &&
+    warn &&
     modifiers.prevent && modifiers.passive
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     );
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = `(${name})==='click'?'contextmenu':(${name})`;
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = `(${name})==='click'?'mouseup':(${name})`;
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic);
   }
   if (modifiers.once) {
     delete modifiers.once;
-    name = '~' + name; // mark the event as once
+    name = prependModifierMarker('~', name, dynamic);
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
+    name = prependModifierMarker('&', name, dynamic);
   }
 
   let events;
@@ -6458,7 +7112,7 @@ function addHandler (
     events = el.events || (el.events = {});
   }
 
-  const newHandler = { value };
+  const newHandler = rangeSetItem({ value: value.trim(), dynamic }, range);
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers;
   }
@@ -6472,6 +7126,17 @@ function addHandler (
   } else {
     events[name] = newHandler;
   }
+
+  el.plain = false;
+}
+
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
 }
 
 function getBindingAttr (
@@ -6517,6 +7182,35 @@ function getAndRemoveAttr (
   return val
 }
 
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  const list = el.attrsList;
+  for (let i = 0, l = list.length; i < l; i++) {
+    const attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
 /*  */
 
 /**
@@ -6534,8 +7228,8 @@ function genComponentModel (
   if (trim) {
     valueExpression =
       `(typeof ${baseValueExpression} === 'string'` +
-        `? ${baseValueExpression}.trim()` +
-        `: ${baseValueExpression})`;
+      `? ${baseValueExpression}.trim()` +
+      `: ${baseValueExpression})`;
   }
   if (number) {
     valueExpression = `_n(${valueExpression})`;
@@ -6544,7 +7238,7 @@ function genComponentModel (
 
   el.model = {
     value: `(${value})`,
-    expression: `"${value}"`,
+    expression: JSON.stringify(value),
     callback: `function (${baseValueExpression}) {${assignment}}`
   };
 }
@@ -6579,16 +7273,14 @@ function genAssignmentCode (
  *
  */
 
-let len;
-let str;
-let chr;
-let index$1;
-let expressionPos;
-let expressionEndPos;
+let len, str, chr, index$1, expressionPos, expressionEndPos;
 
 
 
 function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
   len = val.length;
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
@@ -6691,7 +7383,8 @@ function model (
     if (tag === 'input' && type === 'file') {
       warn$1(
         `<${el.tag} v-model="${value}" type="file">:\n` +
-        `File inputs are read only. Use a v-on:change listener instead.`
+        `File inputs are read only. Use a v-on:change listener instead.`,
+        el.rawAttrsMap['v-model']
       );
     }
   }
@@ -6717,7 +7410,8 @@ function model (
       `<${el.tag} v-model="${value}">: ` +
       `v-model is not supported on this element type. ` +
       'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
     );
   }
 
@@ -6736,11 +7430,11 @@ function genCheckboxModel (
   const falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
   addProp(el, 'checked',
     `Array.isArray(${value})` +
-      `?_i(${value},${valueBinding})>-1` + (
-        trueValueBinding === 'true'
-          ? `:(${value})`
-          : `:_q(${value},${trueValueBinding})`
-      )
+    `?_i(${value},${valueBinding})>-1` + (
+      trueValueBinding === 'true'
+        ? `:(${value})`
+        : `:_q(${value},${trueValueBinding})`
+    )
   );
   addHandler(el, 'change',
     `var $$a=${value},` +
@@ -6749,17 +7443,17 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       `var $$v=${number ? '_n(' + valueBinding + ')' : valueBinding},` +
           '$$i=_i($$a,$$v);' +
-      `if($$el.checked){$$i<0&&(${value}=$$a.concat([$$v]))}` +
-      `else{$$i>-1&&(${value}=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}` +
+      `if($$el.checked){$$i<0&&(${genAssignmentCode(value, '$$a.concat([$$v])')})}` +
+      `else{$$i>-1&&(${genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')})}` +
     `}else{${genAssignmentCode(value, '$$c')}}`,
     null, true
   );
 }
 
 function genRadioModel (
-    el,
-    value,
-    modifiers
+  el,
+  value,
+  modifiers
 ) {
   const number = modifiers && modifiers.number;
   let valueBinding = getBindingAttr(el, 'value') || 'null';
@@ -6769,9 +7463,9 @@ function genRadioModel (
 }
 
 function genSelect (
-    el,
-    value,
-    modifiers
+  el,
+  value,
+  modifiers
 ) {
   const number = modifiers && modifiers.number;
   const selectedVal = `Array.prototype.filter` +
@@ -6793,13 +7487,16 @@ function genDefaultModel (
   const type = el.attrsMap.type;
 
   // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
   {
     const value = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value) {
+    const typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value && !typeBinding) {
       const binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
       warn$1(
         `${binding}="${value}" conflicts with v-model on the same element ` +
-        'because the latter already expands to a value binding internally'
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
       );
     }
   }
@@ -6857,7 +7554,7 @@ function normalizeEvents (on) {
 
 let target$1;
 
-function createOnceHandler (handler, event, capture) {
+function createOnceHandler$1 (event, handler, capture) {
   const _target = target$1; // save current target element in closure
   return function onceHandler () {
     const res = handler.apply(null, arguments);
@@ -6867,17 +7564,49 @@ function createOnceHandler (handler, event, capture) {
   }
 }
 
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+const useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
 function add$1 (
-  event,
+  name,
   handler,
-  once$$1,
   capture,
   passive
 ) {
-  handler = withMacroTask(handler);
-  if (once$$1) handler = createOnceHandler(handler, event, capture);
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    const attachedTimestamp = currentFlushTimestamp;
+    const original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
   target$1.addEventListener(
-    event,
+    name,
     handler,
     supportsPassive
       ? { capture, passive }
@@ -6886,14 +7615,14 @@ function add$1 (
 }
 
 function remove$2 (
-  event,
+  name,
   handler,
   capture,
   _target
 ) {
   (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
+    name,
+    handler._wrapper || handler,
     capture
   );
 }
@@ -6906,7 +7635,7 @@ function updateDOMListeners (oldVnode, vnode) {
   const oldOn = oldVnode.data.on || {};
   target$1 = vnode.elm;
   normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
   target$1 = undefined;
 }
 
@@ -6917,6 +7646,8 @@ var events = {
 
 /*  */
 
+let svgContainer;
+
 function updateDOMProps (oldVnode, vnode) {
   if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
     return
@@ -6931,10 +7662,11 @@ function updateDOMProps (oldVnode, vnode) {
   }
 
   for (key in oldProps) {
-    if (isUndef(props[key])) {
+    if (!(key in props)) {
       elm[key] = '';
     }
   }
+
   for (key in props) {
     cur = props[key];
     // ignore children if the node has textContent or innerHTML,
@@ -6950,7 +7682,7 @@ function updateDOMProps (oldVnode, vnode) {
       }
     }
 
-    if (key === 'value') {
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
       // store value as _value as well since
       // non-string values will be stringified
       elm._value = cur;
@@ -6959,8 +7691,29 @@ function updateDOMProps (oldVnode, vnode) {
       if (shouldUpdateValue(elm, strCur)) {
         elm.value = strCur;
       }
-    } else {
-      elm[key] = cur;
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = `<svg>${cur}</svg>`;
+      const svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
     }
   }
 }
@@ -6971,12 +7724,12 @@ function updateDOMProps (oldVnode, vnode) {
 function shouldUpdateValue (elm, checkVal) {
   return (!elm.composing && (
     elm.tagName === 'OPTION' ||
-    isDirty(elm, checkVal) ||
-    isInputChanged(elm, checkVal)
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
   ))
 }
 
-function isDirty (elm, checkVal) {
+function isNotInFocusAndDirty (elm, checkVal) {
   // return true when textbox (.number and .trim) loses focus and its value is
   // not equal to the updated value
   let notInFocus = true;
@@ -6986,14 +7739,16 @@ function isDirty (elm, checkVal) {
   return notInFocus && elm.value !== checkVal
 }
 
-function isInputChanged (elm, newVal) {
+function isDirtyWithModifiers (elm, newVal) {
   const value = elm.value;
   const modifiers = elm._vModifiers; // injected by v-model runtime
-  if (isDef(modifiers) && modifiers.number) {
-    return toNumber(value) !== toNumber(newVal)
-  }
-  if (isDef(modifiers) && modifiers.trim) {
-    return value.trim() !== newVal.trim()
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
   }
   return value !== newVal
 }
@@ -7011,7 +7766,7 @@ const parseStyleText = cached(function (cssText) {
   const propertyDelimiter = /:(.+)/;
   cssText.split(listDelimiter).forEach(function (item) {
     if (item) {
-      var tmp = item.split(propertyDelimiter);
+      const tmp = item.split(propertyDelimiter);
       tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
     }
   });
@@ -7051,7 +7806,10 @@ function getStyle (vnode, checkChild) {
     let childNode = vnode;
     while (childNode.componentInstance) {
       childNode = childNode.componentInstance._vnode;
-      if (childNode.data && (styleData = normalizeStyleData(childNode.data))) {
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
         extend(res, styleData);
       }
     }
@@ -7079,7 +7837,7 @@ const setProp = (el, name, val) => {
   if (cssVarRE.test(name)) {
     el.style.setProperty(name, val);
   } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
   } else {
     const normalizedName = normalize(name);
     if (Array.isArray(val)) {
@@ -7163,6 +7921,8 @@ var style = {
 
 /*  */
 
+const whitespaceRE = /\s+/;
+
 /**
  * Add class with compatibility for SVG since classList is not supported on
  * SVG elements in IE
@@ -7176,7 +7936,7 @@ function addClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(c => el.classList.add(c));
+      cls.split(whitespaceRE).forEach(c => el.classList.add(c));
     } else {
       el.classList.add(cls);
     }
@@ -7201,7 +7961,7 @@ function removeClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(c => el.classList.remove(c));
+      cls.split(whitespaceRE).forEach(c => el.classList.remove(c));
     } else {
       el.classList.remove(cls);
     }
@@ -7225,20 +7985,20 @@ function removeClass (el, cls) {
 
 /*  */
 
-function resolveTransition (def) {
-  if (!def) {
+function resolveTransition (def$$1) {
+  if (!def$$1) {
     return
   }
   /* istanbul ignore else */
-  if (typeof def === 'object') {
+  if (typeof def$$1 === 'object') {
     const res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
     }
-    extend(res, def);
+    extend(res, def$$1);
     return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
   }
 }
 
@@ -7338,11 +8098,12 @@ const transformRE = /\b(transform|all)(,|$)/;
 
 function getTransitionInfo (el, expectedType) {
   const styles = window.getComputedStyle(el);
-  const transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  const transitionDurations = styles[transitionProp + 'Duration'].split(', ');
+  // JSDOM may return undefined for transition properties
+  const transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  const transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
   const transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  const animationDelays = styles[animationProp + 'Delay'].split(', ');
-  const animationDurations = styles[animationProp + 'Duration'].split(', ');
+  const animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  const animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
   const animationTimeout = getTimeout(animationDelays, animationDurations);
 
   let type;
@@ -7396,8 +8157,12 @@ function getTimeout (delays, durations) {
   }))
 }
 
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
 function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
 }
 
 /*  */
@@ -7448,8 +8213,8 @@ function enter (vnode, toggleDisplay) {
   let context = activeInstance;
   let transitionNode = activeInstance.$vnode;
   while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
     context = transitionNode.context;
+    transitionNode = transitionNode.parent;
   }
 
   const isAppear = !context._isMounted || !vnode.isRootInsert;
@@ -7487,7 +8252,7 @@ function enter (vnode, toggleDisplay) {
       : duration
   );
 
-  if ("development" !== 'production' && explicitEnterDuration != null) {
+  if (explicitEnterDuration != null) {
     checkDuration(explicitEnterDuration, 'enter', vnode);
   }
 
@@ -7531,13 +8296,15 @@ function enter (vnode, toggleDisplay) {
     addTransitionClass(el, startClass);
     addTransitionClass(el, activeClass);
     nextFrame(() => {
-      addTransitionClass(el, toClass);
       removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
         }
       }
     });
@@ -7595,7 +8362,7 @@ function leave (vnode, rm) {
       : duration
   );
 
-  if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
+  if (isDef(explicitLeaveDuration)) {
     checkDuration(explicitLeaveDuration, 'leave', vnode);
   }
 
@@ -7631,7 +8398,7 @@ function leave (vnode, rm) {
       return
     }
     // record leaving element
-    if (!vnode.data.show) {
+    if (!vnode.data.show && el.parentNode) {
       (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
     }
     beforeLeave && beforeLeave(el);
@@ -7639,13 +8406,15 @@ function leave (vnode, rm) {
       addTransitionClass(el, leaveClass);
       addTransitionClass(el, leaveActiveClass);
       nextFrame(() => {
-        addTransitionClass(el, leaveToClass);
         removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
           }
         }
       });
@@ -7768,15 +8537,13 @@ const directive = {
     } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
       el._vModifiers = binding.modifiers;
       if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
         // Safari < 10.2 & UIWebView doesn't fire compositionend when
         // switching focus before confirming composition choice
         // this also fixes the issue where some browsers e.g. iOS Chrome
         // fires "change" instead of "input" on autocomplete.
         el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
         /* istanbul ignore if */
         if (isIE9) {
           el.vmodel = true;
@@ -7822,7 +8589,7 @@ function actuallySetSelected (el, binding, vm) {
   const value = binding.value;
   const isMultiple = el.multiple;
   if (isMultiple && !Array.isArray(value)) {
-    "development" !== 'production' && warn(
+    warn(
       `<select multiple v-model="${binding.expression}"> ` +
       `expects an Array value for its binding, but got ${
         Object.prototype.toString.call(value).slice(8, -1)
@@ -7907,7 +8674,7 @@ var show = {
 
   update (el, { value, oldValue }, vnode) {
     /* istanbul ignore if */
-    if (value === oldValue) return
+    if (!value === !oldValue) return
     vnode = locateNode(vnode);
     const transition$$1 = vnode.data && vnode.data.transition;
     if (transition$$1) {
@@ -7946,9 +8713,6 @@ var platformDirectives = {
 
 /*  */
 
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
 const transitionProps = {
   name: String,
   appear: Boolean,
@@ -8014,6 +8778,10 @@ function isSameChild (child, oldChild) {
   return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
+const isNotTextNode = (c) => c.tag || isAsyncPlaceholder(c);
+
+const isVShowDirective = d => d.name === 'show';
+
 var Transition = {
   name: 'transition',
   props: transitionProps,
@@ -8026,14 +8794,14 @@ var Transition = {
     }
 
     // filter out text nodes (possible whitespaces)
-    children = children.filter((c) => c.tag || isAsyncPlaceholder(c));
+    children = children.filter(isNotTextNode);
     /* istanbul ignore if */
     if (!children.length) {
       return
     }
 
     // warn multiple elements
-    if ("development" !== 'production' && children.length > 1) {
+    if (children.length > 1) {
       warn(
         '<transition> can only be used on a single element. Use ' +
         '<transition-group> for lists.',
@@ -8044,8 +8812,7 @@ var Transition = {
     const mode = this.mode;
 
     // warn invalid mode
-    if ("development" !== 'production' &&
-      mode && mode !== 'in-out' && mode !== 'out-in'
+    if (mode && mode !== 'in-out' && mode !== 'out-in'
     ) {
       warn(
         'invalid <transition> mode: ' + mode,
@@ -8091,7 +8858,7 @@ var Transition = {
 
     // mark v-show
     // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(d => d.name === 'show')) {
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
       child.data.show = true;
     }
 
@@ -8133,17 +8900,6 @@ var Transition = {
 
 /*  */
 
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
-
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
-
 const props = extend({
   tag: String,
   moveClass: String
@@ -8154,6 +8910,23 @@ delete props.mode;
 var TransitionGroup = {
   props,
 
+  beforeMount () {
+    const update = this._update;
+    this._update = (vnode, hydrating) => {
+      const restoreActiveInstance = setActiveInstance(this);
+      // force removing pass
+      this.__patch__(
+        this._vnode,
+        this.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this._vnode = this.kept;
+      restoreActiveInstance();
+      update.call(this, vnode, hydrating);
+    };
+  },
+
   render (h) {
     const tag = this.tag || this.$vnode.data.tag || 'span';
     const map = Object.create(null);
@@ -8197,17 +8970,6 @@ var TransitionGroup = {
     return h(tag, null, children)
   },
 
-  beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important, avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
-
   updated () {
     const children = this.prevChildren;
     const moveClass = this.moveClass || ((this.name || 'v') + '-move');
@@ -8228,11 +8990,14 @@ var TransitionGroup = {
 
     children.forEach((c) => {
       if (c.data.moved) {
-        var el = c.elm;
-        var s = el.style;
+        const el = c.elm;
+        const s = el.style;
         addTransitionClass(el, moveClass);
         s.transform = s.WebkitTransform = s.transitionDuration = '';
         el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
           if (!e || /transform$/.test(e.propertyName)) {
             el.removeEventListener(transitionEndEvent, cb);
             el._moveCb = null;
@@ -8308,21 +9073,21 @@ var platformComponents = {
 /*  */
 
 // install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
 
 // install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
 
 // install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
 
 // public mount method
-Vue$3.prototype.$mount = function (
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -8332,32 +9097,33 @@ Vue$3.prototype.$mount = function (
 
 // devtools global hook
 /* istanbul ignore next */
-Vue$3.nextTick(() => {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if ("development" !== 'production' && isChrome) {
+if (inBrowser) {
+  setTimeout(() => {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
       console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
+        `You are running Vue in development mode.\n` +
+        `Make sure to turn on production mode when deploying for production.\n` +
+        `See more tips at https://vuejs.org/guide/deployment.html`
       );
     }
-  }
-  if ("development" !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      `You are running Vue in development mode.\n` +
-      `Make sure to turn on production mode when deploying for production.\n` +
-      `See more tips at https://vuejs.org/guide/deployment.html`
-    );
-  }
-}, 0);
+  }, 0);
+}
 
 /*  */
 
-const defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+const defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
 const regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
 const buildRegex = cached(delimiters => {
@@ -8366,6 +9132,8 @@ const buildRegex = cached(delimiters => {
   return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
 });
 
+
+
 function parseText (
   text,
   delimiters
@@ -8375,23 +9143,30 @@ function parseText (
     return
   }
   const tokens = [];
+  const rawTokens = [];
   let lastIndex = tagRE.lastIndex = 0;
-  let match, index;
+  let match, index, tokenValue;
   while ((match = tagRE.exec(text))) {
     index = match.index;
     // push text token
     if (index > lastIndex) {
-      tokens.push(JSON.stringify(text.slice(lastIndex, index)));
+      rawTokens.push(tokenValue = text.slice(lastIndex, index));
+      tokens.push(JSON.stringify(tokenValue));
     }
     // tag token
     const exp = parseFilters(match[1].trim());
     tokens.push(`_s(${exp})`);
+    rawTokens.push({ '@binding': exp });
     lastIndex = index + match[0].length;
   }
   if (lastIndex < text.length) {
-    tokens.push(JSON.stringify(text.slice(lastIndex)));
+    rawTokens.push(tokenValue = text.slice(lastIndex));
+    tokens.push(JSON.stringify(tokenValue));
+  }
+  return {
+    expression: tokens.join('+'),
+    tokens: rawTokens
   }
-  return tokens.join('+')
 }
 
 /*  */
@@ -8399,14 +9174,15 @@ function parseText (
 function transformNode (el, options) {
   const warn = options.warn || baseWarn;
   const staticClass = getAndRemoveAttr(el, 'class');
-  if ("development" !== 'production' && staticClass) {
-    const expression = parseText(staticClass, options.delimiters);
-    if (expression) {
+  if (staticClass) {
+    const res = parseText(staticClass, options.delimiters);
+    if (res) {
       warn(
         `class="${staticClass}": ` +
         'Interpolation inside attributes has been removed. ' +
         'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
       );
     }
   }
@@ -8444,13 +9220,14 @@ function transformNode$1 (el, options) {
   if (staticStyle) {
     /* istanbul ignore if */
     {
-      const expression = parseText(staticStyle, options.delimiters);
-      if (expression) {
+      const res = parseText(staticStyle, options.delimiters);
+      if (res) {
         warn(
           `style="${staticStyle}": ` +
           'Interpolation inside attributes has been removed. ' +
           'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
         );
       }
     }
@@ -8519,31 +9296,19 @@ const isNonPhrasingTag = makeMap(
  * Not type-checking this file because it's mostly vendor code.
  */
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
 // Regular Expressions for parsing tags and attributes
 const attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-const ncname = '[a-zA-Z_][\\w\\-\\.]*';
+const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+const ncname = `[a-zA-Z_][\\-\\.0-9_a-zA-Z${unicodeRegExp.source}]*`;
 const qnameCapture = `((?:${ncname}\\:)?${ncname})`;
 const startTagOpen = new RegExp(`^<${qnameCapture}`);
 const startTagClose = /^\s*(\/?)>/;
 const endTag = new RegExp(`^<\\/${qnameCapture}[^>]*>`);
 const doctype = /^<!DOCTYPE [^>]+>/i;
-const comment = /^<!--/;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+const comment = /^<!\--/;
 const conditionalComment = /^<!\[/;
 
-let IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
 // Special Elements (can contain anything)
 const isPlainTextElement = makeMap('script,style,textarea', true);
 const reCache = {};
@@ -8554,10 +9319,11 @@ const decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 };
-const encodedAttr = /&(?:lt|gt|quot|amp);/g;
-const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+const encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
 
 // #5992
 const isIgnoreNewlineTag = makeMap('pre,textarea', true);
@@ -8587,7 +9353,7 @@ function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
             }
             advance(commentEnd + 3);
             continue
@@ -8624,7 +9390,7 @@ function parseHTML (html, options) {
         const startTagMatch = parseStartTag();
         if (startTagMatch) {
           handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1);
           }
           continue
@@ -8647,16 +9413,18 @@ function parseHTML (html, options) {
           rest = html.slice(textEnd);
         }
         text = html.substring(0, textEnd);
-        advance(textEnd);
       }
 
       if (textEnd < 0) {
         text = html;
-        html = '';
+      }
+
+      if (text) {
+        advance(text.length);
       }
 
       if (options.chars && text) {
-        options.chars(text);
+        options.chars(text, index - text.length, index);
       }
     } else {
       let endTagLength = 0;
@@ -8666,7 +9434,7 @@ function parseHTML (html, options) {
         endTagLength = endTag.length;
         if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
           text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
             .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
         }
         if (shouldIgnoreFirstNewline(stackedTag, text)) {
@@ -8684,8 +9452,8 @@ function parseHTML (html, options) {
 
     if (html === last) {
       options.chars && options.chars(html);
-      if ("development" !== 'production' && !stack.length && options.warn) {
-        options.warn(`Mal-formatted tag at end of template: "${html}"`);
+      if (!stack.length && options.warn) {
+        options.warn(`Mal-formatted tag at end of template: "${html}"`, { start: index + html.length });
       }
       break
     }
@@ -8709,8 +9477,10 @@ function parseHTML (html, options) {
       };
       advance(start[0].length);
       let end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
         advance(attr[0].length);
+        attr.end = index;
         match.attrs.push(attr);
       }
       if (end) {
@@ -8741,12 +9511,6 @@ function parseHTML (html, options) {
     const attrs = new Array(l);
     for (let i = 0; i < l; i++) {
       const args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
       const value = args[3] || args[4] || args[5] || '';
       const shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -8755,10 +9519,14 @@ function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       };
+      if (options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
       lastTag = tagName;
     }
 
@@ -8772,12 +9540,9 @@ function parseHTML (html, options) {
     if (start == null) start = index;
     if (end == null) end = index;
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -8791,12 +9556,12 @@ function parseHTML (html, options) {
     if (pos >= 0) {
       // Close all the open elements, up the stack
       for (let i = stack.length - 1; i >= pos; i--) {
-        if ("development" !== 'production' &&
-          (i > pos || !tagName) &&
+        if (i > pos || !tagName &&
           options.warn
         ) {
           options.warn(
-            `tag <${stack[i].tag}> has no matching end tag.`
+            `tag <${stack[i].tag}> has no matching end tag.`,
+            { start: stack[i].start, end: stack[i].end }
           );
         }
         if (options.end) {
@@ -8825,16 +9590,27 @@ function parseHTML (html, options) {
 /*  */
 
 const onRE = /^@|^v-on:/;
-const dirRE = /^v-|^@|^:/;
-const forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-const forIteratorRE = /\((\{[^}]*\}|[^,]*),([^,]*)(?:,([^,]*))?\)/;
+const dirRE = /^v-|^@|^:|^#/;
+const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+const stripParensRE = /^\(|\)$/g;
+const dynamicArgRE = /^\[.*\]$/;
 
 const argRE = /:(.*)$/;
-const bindRE = /^:|^v-bind:/;
-const modifierRE = /\.[^.]+/g;
+const bindRE = /^:|^\.|^v-bind:/;
+const modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+const slotRE = /^v-slot(:|$)|^#/;
+
+const lineBreakRE = /[\r\n]/;
+const whitespaceRE$1 = /[ \f\t\r\n]+/g;
+
+const invalidAttributeRE = /[\s"'<>\/=]/;
 
 const decodeHTMLCached = cached(he.decode);
 
+const emptySlotScopeToken = `_empty_`;
+
 // configurable state
 let warn$2;
 let delimiters;
@@ -8844,8 +9620,7 @@ let postTransforms;
 let platformIsPreTag;
 let platformMustUseProp;
 let platformGetTagNamespace;
-
-
+let maybeComponent;
 
 function createASTElement (
   tag,
@@ -8857,6 +9632,7 @@ function createASTElement (
     tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent,
     children: []
   }
@@ -8874,7 +9650,13 @@ function parse (
   platformIsPreTag = options.isPreTag || no;
   platformMustUseProp = options.mustUseProp || no;
   platformGetTagNamespace = options.getTagNamespace || no;
-
+  const isReservedTag = options.isReservedTag || no;
+  maybeComponent = (el) => !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  );
   transforms = pluckModuleFunction(options.modules, 'transformNode');
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
@@ -8883,20 +9665,67 @@ function parse (
 
   const stack = [];
   const preserveWhitespace = options.preserveWhitespace !== false;
+  const whitespaceOption = options.whitespace;
   let root;
   let currentParent;
   let inVPre = false;
   let inPre = false;
   let warned = false;
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true;
-      warn$2(msg);
+      warn$2(msg, range);
     }
   }
 
-  function endPre (element) {
+  function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else {
+        warnOnce(
+          `Component template should contain exactly one root element. ` +
+          `If you are using v-if on multiple elements, ` +
+          `use v-else-if to chain them instead.`,
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          const name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(c => !(c).slotScope);
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
     // check pre state
     if (element.pre) {
       inVPre = false;
@@ -8904,6 +9733,41 @@ function parse (
     if (platformIsPreTag(element.tag)) {
       inPre = false;
     }
+    // apply post-transforms
+    for (let i = 0; i < postTransforms.length; i++) {
+      postTransforms[i](element, options);
+    }
+  }
+
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      let lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        `Cannot use <${el.tag}> as component root element because it may ` +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
   }
 
   parseHTML(template, {
@@ -8914,7 +9778,8 @@ function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start (tag, attrs, unary, start, end) {
       // check namespace.
       // inherit parent ns if there is one
       const ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
@@ -8930,12 +9795,36 @@ function parse (
         element.ns = ns;
       }
 
+      {
+        if (options.outputSourceRange) {
+          element.start = start;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce((cumulated, attr) => {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(attr => {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$2(
+              `Invalid dynamic argument expression: attribute names cannot contain ` +
+              `spaces, quotes, <, >, / or =.`,
+              {
+                start: attr.start + attr.name.indexOf(`[`),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true;
-        "development" !== 'production' && warn$2(
+        warn$2(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          `<${tag}>` + ', as they will not be parsed.'
+          `<${tag}>` + ', as they will not be parsed.',
+          { start: element.start }
         );
       }
 
@@ -8960,93 +9849,46 @@ function parse (
         processFor(element);
         processIf(element);
         processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
-
-      function checkRootConstraints (el) {
-        {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              `Cannot use <${el.tag}> as component root element because it may ` +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
       }
 
-      // tree management
       if (!root) {
         root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else {
-          warnOnce(
-            `Component template should contain exactly one root element. ` +
-            `If you are using v-if on multiple elements, ` +
-            `use v-else-if to chain them instead.`
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          const name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
+        {
+          checkRootConstraints(root);
         }
       }
+
       if (!unary) {
         currentParent = element;
         stack.push(element);
       } else {
-        endPre(element);
-      }
-      // apply post-transforms
-      for (let i = 0; i < postTransforms.length; i++) {
-        postTransforms[i](element, options);
+        closeElement(element);
       }
     },
 
-    end () {
-      // remove trailing whitespace
+    end (tag, start, end) {
       const element = stack[stack.length - 1];
-      const lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
       // pop stack
       stack.length -= 1;
       currentParent = stack[stack.length - 1];
-      endPre(element);
+      if (options.outputSourceRange) {
+        element.end = end;
+      }
+      closeElement(element);
     },
 
-    chars (text) {
+    chars (text, start, end) {
       if (!currentParent) {
         {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start }
             );
           } else if ((text = text.trim())) {
             warnOnce(
-              `text "${text}" outside root element will be ignored.`
+              `text "${text}" outside root element will be ignored.`,
+              { start }
             );
           }
         }
@@ -9061,32 +9903,66 @@ function parse (
         return
       }
       const children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
       if (text) {
-        let expression;
-        if (!inVPre && text !== ' ' && (expression = parseText(text, delimiters))) {
-          children.push({
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE$1, ' ');
+        }
+        let res;
+        let child;
+        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+          child = {
             type: 2,
-            expression,
+            expression: res.expression,
+            tokens: res.tokens,
             text
-          });
+          };
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text
-          });
+          };
+        }
+        if (child) {
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
         }
       }
     },
-    comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text,
-        isComment: true
-      });
+    comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        const child = {
+          type: 3,
+          text,
+          isComment: true
+        };
+        if (options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
     }
   });
   return root
@@ -9099,14 +9975,19 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  const l = el.attrsList.length;
-  if (l) {
-    const attrs = el.attrs = new Array(l);
-    for (let i = 0; i < l; i++) {
+  const list = el.attrsList;
+  const len = list.length;
+  if (len) {
+    const attrs = el.attrs = new Array(len);
+    for (let i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
       };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
     }
   } else if (!el.pre) {
     // non root node in pre blocks with no attributes
@@ -9114,27 +9995,53 @@ function processRawAttrs (el) {
   }
 }
 
-function processElement (element, options) {
+function processElement (
+  element,
+  options
+) {
   processKey(element);
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
 
   processRef(element);
-  processSlot(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
   processComponent(element);
   for (let i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element;
   }
   processAttrs(element);
+  return element
 }
 
 function processKey (el) {
   const exp = getBindingAttr(el, 'key');
   if (exp) {
-    if ("development" !== 'production' && el.tag === 'template') {
-      warn$2(`<template> cannot be keyed. Place the key on real elements instead.`);
+    {
+      if (el.tag === 'template') {
+        warn$2(
+          `<template> cannot be keyed. Place the key on real elements instead.`,
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        const iterator = el.iterator2 || el.iterator1;
+        const parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$2(
+            `Do not use v-for index as key on <transition-group> children, ` +
+            `this is the same as not using keys.`,
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
     }
     el.key = exp;
   }
@@ -9151,26 +10058,37 @@ function processRef (el) {
 function processFor (el) {
   let exp;
   if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    const inMatch = exp.match(forAliasRE);
-    if (!inMatch) {
-      "development" !== 'production' && warn$2(
-        `Invalid v-for expression: ${exp}`
+    const res = parseFor(exp);
+    if (res) {
+      extend(el, res);
+    } else {
+      warn$2(
+        `Invalid v-for expression: ${exp}`,
+        el.rawAttrsMap['v-for']
       );
-      return
     }
-    el.for = inMatch[2].trim();
-    const alias = inMatch[1].trim();
-    const iteratorMatch = alias.match(forIteratorRE);
-    if (iteratorMatch) {
-      el.alias = iteratorMatch[1].trim();
-      el.iterator1 = iteratorMatch[2].trim();
-      if (iteratorMatch[3]) {
-        el.iterator2 = iteratorMatch[3].trim();
-      }
-    } else {
-      el.alias = alias;
+  }
+}
+
+
+
+function parseFor (exp) {
+  const inMatch = exp.match(forAliasRE);
+  if (!inMatch) return
+  const res = {};
+  res.for = inMatch[2].trim();
+  const alias = inMatch[1].trim().replace(stripParensRE, '');
+  const iteratorMatch = alias.match(forIteratorRE);
+  if (iteratorMatch) {
+    res.alias = alias.replace(forIteratorRE, '').trim();
+    res.iterator1 = iteratorMatch[1].trim();
+    if (iteratorMatch[2]) {
+      res.iterator2 = iteratorMatch[2].trim();
     }
+  } else {
+    res.alias = alias;
   }
+  return res
 }
 
 function processIf (el) {
@@ -9202,7 +10120,8 @@ function processIfConditions (el, parent) {
   } else {
     warn$2(
       `v-${el.elseif ? ('else-if="' + el.elseif + '"') : 'else'} ` +
-      `used on element <${el.tag}> without corresponding v-if.`
+      `used on element <${el.tag}> without corresponding v-if.`,
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     );
   }
 }
@@ -9213,10 +10132,11 @@ function findPrevElement (children) {
     if (children[i].type === 1) {
       return children[i]
     } else {
-      if ("development" !== 'production' && children[i].text !== ' ') {
+      if (children[i].text !== ' ') {
         warn$2(
           `text "${children[i].text.trim()}" between v-if and v-else(-if) ` +
-          `will be ignored.`
+          `will be ignored.`,
+          children[i]
         );
       }
       children.pop();
@@ -9238,51 +10158,153 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if ("development" !== 'production' && el.key) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  let slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (slotScope) {
       warn$2(
-        `\`key\` does not work on <slot> because slots are abstract outlets ` +
-        `and can possibly expand into multiple elements. ` +
-        `Use the key on a wrapping element instead.`
+        `the "scope" attribute for scoped slots have been deprecated and ` +
+        `replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ` +
+        `can also be used on plain elements in addition to <template> to ` +
+        `denote scoped slots.`,
+        el.rawAttrsMap['scope'],
+        true
       );
     }
-  } else {
-    let slotScope;
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (el.attrsMap['v-for']) {
+      warn$2(
+        `Ambiguous combined usage of slot-scope and v-for on <${el.tag}> ` +
+        `(v-for takes higher priority). Use a wrapper <template> for the ` +
+        `scoped slot to make it clearer.`,
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  const slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
     if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if ("development" !== 'production' && slotScope) {
-        warn$2(
-          `the "scope" attribute for scoped slots have been deprecated and ` +
-          `replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ` +
-          `can also be used on plain elements in addition to <template> to ` +
-          `denote scoped slots.`,
-          true
-        );
+      // v-slot on <template>
+      const slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        {
+          if (el.slotTarget || el.slotScope) {
+            warn$2(
+              `Unexpected mixed usage of different slot syntaxes.`,
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$2(
+              `<template v-slot> can only appear at the root level inside ` +
+              `the receiving component`,
+              el
+            );
+          }
+        }
+        const { name, dynamic } = getSlotName(slotBinding);
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if ("development" !== 'production' && el.attrsMap['v-for']) {
-        warn$2(
-          `Ambiguous combined usage of slot-scope and v-for on <${el.tag}> ` +
-          `(v-for takes higher priority). Use a wrapper <template> for the ` +
-          `scoped slot to make it clearer.`,
-          true
-        );
+    } else {
+      // v-slot on component, denotes default slot
+      const slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        {
+          if (!maybeComponent(el)) {
+            warn$2(
+              `v-slot can only be used on components or <template>.`,
+              slotBinding
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$2(
+              `Unexpected mixed usage of different slot syntaxes.`,
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$2(
+              `To avoid scope ambiguity, the default slot should also use ` +
+              `<template> syntax when there are other named slots.`,
+              slotBinding
+            );
+          }
+        }
+        // add the component's children to its default slot
+        const slots = el.scopedSlots || (el.scopedSlots = {});
+        const { name, dynamic } = getSlotName(slotBinding);
+        const slotContainer = slots[name] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name;
+        slotContainer.slotTargetDynamic = dynamic;
+        slotContainer.children = el.children.filter((c) => {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
       }
-      el.slotScope = slotScope;
     }
-    const slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
+  }
+}
+
+function getSlotName (binding) {
+  let name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else {
+      warn$2(
+        `v-slot shorthand syntax requires a slot name.`,
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: `"${name}"`, dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (el.key) {
+      warn$2(
+        `\`key\` does not work on <slot> because slots are abstract outlets ` +
+        `and can possibly expand into multiple elements. ` +
+        `Use the key on a wrapping element instead.`,
+        getRawBindingAttr(el, 'key')
+      );
     }
   }
 }
@@ -9299,7 +10321,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   const list = el.attrsList;
-  let i, l, name, rawName, value, modifiers, isProp;
+  let i, l, name, rawName, value, modifiers, syncGen, isDynamic;
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name;
     value = list[i].value;
@@ -9307,74 +10329,124 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true;
       // modifiers
-      modifiers = parseModifiers(name);
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
       if (modifiers) {
         name = name.replace(modifierRE, '');
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
-        isProp = false;
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          value.trim().length === 0
+        ) {
+          warn$2(
+            `The value for a v-bind expression cannot be empty. Found in "v-bind:${name}"`
+          );
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name);
             if (name === 'innerHtml') name = 'innerHTML';
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name);
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              `update:${camelize(name)}`,
-              genAssignmentCode(value, `$event`)
-            );
+            syncGen = genAssignmentCode(value, `$event`);
+            if (!isDynamic) {
+              addHandler(
+                el,
+                `update:${camelize(name)}`,
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  `update:${hyphenate(name)}`,
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                `"update:"+(${name})`,
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i],
+                true // dynamic
+              );
+            }
           }
         }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value);
+          addProp(el, name, value, list[i], isDynamic);
         } else {
-          addAttr(el, name, value);
+          addAttr(el, name, value, list[i], isDynamic);
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$2);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
       } else { // normal directives
         name = name.replace(dirRE, '');
         // parse arg
         const argMatch = name.match(argRE);
-        const arg = argMatch && argMatch[1];
+        let arg = argMatch && argMatch[1];
+        isDynamic = false;
         if (arg) {
           name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if ("development" !== 'production' && name === 'model') {
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+        if (name === 'model') {
           checkForAliasModel(el, value);
         }
       }
     } else {
       // literal attribute
       {
-        const expression = parseText(value, delimiters);
-        if (expression) {
+        const res = parseText(value, delimiters);
+        if (res) {
           warn$2(
             `${name}="${value}": ` +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
+      addAttr(el, name, JSON.stringify(value), list[i]);
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+        addProp(el, name, 'true', list[i]);
       }
     }
   }
@@ -9404,10 +10476,9 @@ function makeAttrsMap (attrs) {
   const map = {};
   for (let i = 0, l = attrs.length; i < l; i++) {
     if (
-      "development" !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn$2('duplicate attribute: ' + attrs[i].name);
+      warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
     }
     map[attrs[i].name] = attrs[i].value;
   }
@@ -9454,7 +10525,8 @@ function checkForAliasModel (el, value) {
         `You are binding v-model directly to a v-for iteration alias. ` +
         `This will not be able to modify the v-for source array because ` +
         `writing to the alias is like modifying a function local variable. ` +
-        `Consider using an array of objects and use v-model on an object property instead.`
+        `Consider using an array of objects and use v-model on an object property instead.`,
+        el.rawAttrsMap['v-model']
       );
     }
     _el = _el.parent;
@@ -9463,21 +10535,22 @@ function checkForAliasModel (el, value) {
 
 /*  */
 
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
 function preTransformNode (el, options) {
   if (el.tag === 'input') {
     const map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      const typeBinding = getBindingAttr(el, 'type');
+    if (!map['v-model']) {
+      return
+    }
+
+    let typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = `(${map['v-bind']}).type`;
+    }
+
+    if (typeBinding) {
       const ifCondition = getAndRemoveAttr(el, 'v-if', true);
       const ifConditionExtra = ifCondition ? `&&(${ifCondition})` : ``;
       const hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
@@ -9528,26 +10601,21 @@ function cloneASTElement (el) {
   return createASTElement(el.tag, el.attrsList.slice(), el.parent)
 }
 
-function addRawAttr (el, name, value) {
-  el.attrsMap[name] = value;
-  el.attrsList.push({ name, value });
-}
-
-var model$2 = {
+var model$1 = {
   preTransformNode
 };
 
 var modules$1 = [
   klass$1,
   style$1,
-  model$2
+  model$1
 ];
 
 /*  */
 
 function text (el, dir) {
   if (dir.value) {
-    addProp(el, 'textContent', `_s(${dir.value})`);
+    addProp(el, 'textContent', `_s(${dir.value})`, dir);
   }
 }
 
@@ -9555,7 +10623,7 @@ function text (el, dir) {
 
 function html (el, dir) {
   if (dir.value) {
-    addProp(el, 'innerHTML', `_s(${dir.value})`);
+    addProp(el, 'innerHTML', `_s(${dir.value})`, dir);
   }
 }
 
@@ -9610,7 +10678,7 @@ function optimize (root, options) {
 
 function genStaticKeys$1 (keys) {
   return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
     (keys ? ',' + keys : '')
   )
 }
@@ -9709,10 +10777,11 @@ function isDirectChildOfTemplateFor (node) {
 
 /*  */
 
-const fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-const simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+const fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+const fnInvokeRE = /\([^)]*?\);*$/;
+const simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 const keyCodes = {
   esc: 27,
   tab: 9,
@@ -9725,6 +10794,23 @@ const keyCodes = {
   'delete': [8, 46]
 };
 
+// KeyboardEvent.key aliases
+const keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -9745,35 +10831,47 @@ const modifierCode = {
 
 function genHandlers (
   events,
-  isNative,
-  warn
+  isNative
 ) {
-  let res = isNative ? 'nativeOn:{' : 'on:{';
+  const prefix = isNative ? 'nativeOn:' : 'on:';
+  let staticHandlers = ``;
+  let dynamicHandlers = ``;
   for (const name in events) {
-    res += `"${name}":${genHandler(name, events[name])},`;
+    const handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += `${name},${handlerCode},`;
+    } else {
+      staticHandlers += `"${name}":${handlerCode},`;
+    }
+  }
+  staticHandlers = `{${staticHandlers.slice(0, -1)}}`;
+  if (dynamicHandlers) {
+    return prefix + `_d(${staticHandlers},[${dynamicHandlers.slice(0, -1)}])`
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
-function genHandler (
-  name,
-  handler
-) {
+function genHandler (handler) {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return `[${handler.map(handler => genHandler(name, handler)).join(',')}]`
+    return `[${handler.map(handler => genHandler(handler)).join(',')}]`
   }
 
   const isMethodPath = simplePathRE.test(handler.value);
   const isFunctionExpression = fnExpRE.test(handler.value);
+  const isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
 
   if (!handler.modifiers) {
-    return isMethodPath || isFunctionExpression
-      ? handler.value
-      : `function($event){${handler.value}}` // inline statement
+    if (isMethodPath || isFunctionExpression) {
+      return handler.value
+    }
+    return `function($event){${
+      isFunctionInvocation ? `return ${handler.value}` : handler.value
+    }}` // inline statement
   } else {
     let code = '';
     let genModifierCode = '';
@@ -9805,16 +10903,24 @@ function genHandler (
       code += genModifierCode;
     }
     const handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? `return ${handler.value}.apply(null, arguments)`
       : isFunctionExpression
-        ? `(${handler.value})($event)`
-        : handler.value;
+        ? `return (${handler.value}).apply(null, arguments)`
+        : isFunctionInvocation
+          ? `return ${handler.value}`
+          : handler.value;
     return `function($event){${code}${handlerCode}}`
   }
 }
 
 function genKeyFilter (keys) {
-  return `if(!('button' in $event)&&${keys.map(genFilterCode).join('&&')})return null;`
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    `if(!$event.type.indexOf('key')&&` +
+    `${keys.map(genFilterCode).join('&&')})return null;`
+  )
 }
 
 function genFilterCode (key) {
@@ -9822,19 +10928,22 @@ function genFilterCode (key) {
   if (keyVal) {
     return `$event.keyCode!==${keyVal}`
   }
-  const code = keyCodes[key];
+  const keyCode = keyCodes[key];
+  const keyName = keyNames[key];
   return (
     `_k($event.keyCode,` +
     `${JSON.stringify(key)},` +
-    `${JSON.stringify(code)},` +
-    `$event.key)`
+    `${JSON.stringify(keyCode)},` +
+    `$event.key,` +
+    `${JSON.stringify(keyName)}` +
+    `)`
   )
 }
 
 /*  */
 
 function on (el, dir) {
-  if ("development" !== 'production' && dir.modifiers) {
+  if (dir.modifiers) {
     warn(`v-on without argument does not support modifiers.`);
   }
   el.wrapListeners = (code) => `_g(${code},${dir.value})`;
@@ -9862,6 +10971,10 @@ var baseDirectives = {
 
 /*  */
 
+
+
+
+
 class CodegenState {
   
   
@@ -9871,6 +10984,7 @@ class CodegenState {
   
   
   
+  
 
   constructor (options) {
     this.options = options;
@@ -9879,9 +10993,10 @@ class CodegenState {
     this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
     this.directives = extend(extend({}, baseDirectives), options.directives);
     const isReservedTag = options.isReservedTag || no;
-    this.maybeComponent = (el) => !isReservedTag(el.tag);
+    this.maybeComponent = (el) => !!el.component || !isReservedTag(el.tag);
     this.onceId = 0;
     this.staticRenderFns = [];
+    this.pre = false;
   }
 }
 
@@ -9892,7 +11007,8 @@ function generate (
   options
 ) {
   const state = new CodegenState(options);
-  const code = ast ? genElement(ast, state) : '_c("div")';
+  // fix #11483, Root level <script> tags should not be rendered.
+  const code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
   return {
     render: `with(this){return ${code}}`,
     staticRenderFns: state.staticRenderFns
@@ -9900,6 +11016,10 @@ function generate (
 }
 
 function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -9908,7 +11028,7 @@ function genElement (el, state) {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -9918,7 +11038,10 @@ function genElement (el, state) {
     if (el.component) {
       code = genComponent(el.component, el, state);
     } else {
-      const data = el.plain ? undefined : genData$2(el, state);
+      let data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
 
       const children = el.inlineTemplate ? null : genChildren(el, state, true);
       code = `_c('${el.tag}'${
@@ -9936,15 +11059,21 @@ function genElement (el, state) {
 }
 
 // hoist static sub-trees out
-function genStatic (el, state, once$$1) {
+function genStatic (el, state) {
   el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  const originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
   state.staticRenderFns.push(`with(this){return ${genElement(el, state)}}`);
+  state.pre = originalPreState;
   return `_m(${
     state.staticRenderFns.length - 1
-  },${
-    el.staticInFor ? 'true' : 'false'
-  },${
-    once$$1 ? 'true' : 'false'
+  }${
+    el.staticInFor ? ',true' : ''
   })`
 }
 
@@ -9964,14 +11093,15 @@ function genOnce (el, state) {
       parent = parent.parent;
     }
     if (!key) {
-      "development" !== 'production' && state.warn(
-        `v-once can only be used inside v-for that is keyed. `
+      state.warn(
+        `v-once can only be used inside v-for that is keyed. `,
+        el.rawAttrsMap['v-once']
       );
       return genElement(el, state)
     }
     return `_o(${genElement(el, state)},${state.onceId++},${key})`
   } else {
-    return genStatic(el, state, true)
+    return genStatic(el, state)
   }
 }
 
@@ -10027,8 +11157,7 @@ function genFor (
   const iterator1 = el.iterator1 ? `,${el.iterator1}` : '';
   const iterator2 = el.iterator2 ? `,${el.iterator2}` : '';
 
-  if ("development" !== 'production' &&
-    state.maybeComponent(el) &&
+  if (state.maybeComponent(el) &&
     el.tag !== 'slot' &&
     el.tag !== 'template' &&
     !el.key
@@ -10037,6 +11166,7 @@ function genFor (
       `<${el.tag} v-for="${alias} in ${exp}">: component lists rendered with ` +
       `v-for should have explicit keys. ` +
       `See https://vuejs.org/guide/list.html#key for more info.`,
+      el.rawAttrsMap['v-for'],
       true /* tip */
     );
   }
@@ -10081,18 +11211,18 @@ function genData$2 (el, state) {
   }
   // attributes
   if (el.attrs) {
-    data += `attrs:{${genProps(el.attrs)}},`;
+    data += `attrs:${genProps(el.attrs)},`;
   }
   // DOM props
   if (el.props) {
-    data += `domProps:{${genProps(el.props)}},`;
+    data += `domProps:${genProps(el.props)},`;
   }
   // event handlers
   if (el.events) {
-    data += `${genHandlers(el.events, false, state.warn)},`;
+    data += `${genHandlers(el.events, false)},`;
   }
   if (el.nativeEvents) {
-    data += `${genHandlers(el.nativeEvents, true, state.warn)},`;
+    data += `${genHandlers(el.nativeEvents, true)},`;
   }
   // slot target
   // only for non-scoped slots
@@ -10101,7 +11231,7 @@ function genData$2 (el, state) {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += `${genScopedSlots(el.scopedSlots, state)},`;
+    data += `${genScopedSlots(el, el.scopedSlots, state)},`;
   }
   // component v-model
   if (el.model) {
@@ -10121,6 +11251,12 @@ function genData$2 (el, state) {
     }
   }
   data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = `_b(${data},"${el.tag}",${genProps(el.dynamicAttrs)})`;
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data);
@@ -10152,7 +11288,7 @@ function genDirectives (el, state) {
       res += `{name:"${dir.name}",rawName:"${dir.rawName}"${
         dir.value ? `,value:(${dir.value}),expression:${JSON.stringify(dir.value)}` : ''
       }${
-        dir.arg ? `,arg:"${dir.arg}"` : ''
+        dir.arg ? `,arg:${dir.isDynamicArg ? dir.arg : `"${dir.arg}"`}` : ''
       }${
         dir.modifiers ? `,modifiers:${JSON.stringify(dir.modifiers)}` : ''
       }},`;
@@ -10165,12 +11301,13 @@ function genDirectives (el, state) {
 
 function genInlineTemplate (el, state) {
   const ast = el.children[0];
-  if ("development" !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
+  if (el.children.length !== 1 || ast.type !== 1) {
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
   }
-  if (ast.type === 1) {
+  if (ast && ast.type === 1) {
     const inlineRenderFns = generate(ast, state.options);
     return `inlineTemplate:{render:function(){${
       inlineRenderFns.render
@@ -10181,48 +11318,106 @@ function genInlineTemplate (el, state) {
 }
 
 function genScopedSlots (
+  el,
   slots,
   state
 ) {
-  return `scopedSlots:_u([${
-    Object.keys(slots).map(key => {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')
-  }])`
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  let needsForceUpdate = el.for || Object.keys(slots).some(key => {
+    const slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  let needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    let parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  const generatedSlots = Object.keys(slots)
+    .map(key => genScopedSlot(slots[key], state))
+    .join(',');
+
+  return `scopedSlots:_u([${generatedSlots}]${
+    needsForceUpdate ? `,null,true` : ``
+  }${
+    !needsForceUpdate && needsKey ? `,null,false,${hash(generatedSlots)}` : ``
+  })`
+}
+
+function hash(str) {
+  let hash = 5381;
+  let i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key,
   el,
   state
 ) {
+  const isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, `null`)
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  const fn = `function(${String(el.slotScope)}){` +
+  const slotScope = el.slotScope === emptySlotScopeToken
+    ? ``
+    : String(el.slotScope);
+  const fn = `function(${slotScope}){` +
     `return ${el.tag === 'template'
-      ? el.if
-        ? `${el.if}?${genChildren(el, state) || 'undefined'}:undefined`
+      ? el.if && isLegacySyntax
+        ? `(${el.if})?${genChildren(el, state) || 'undefined'}:undefined`
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)
-  }}`;
-  return `{key:${key},fn:${fn}}`
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  const exp = el.for;
-  const alias = el.alias;
-  const iterator1 = el.iterator1 ? `,${el.iterator1}` : '';
-  const iterator2 = el.iterator2 ? `,${el.iterator2}` : '';
-  el.forProcessed = true; // avoid recursion
-  return `_l((${exp}),` +
-    `function(${alias}${iterator1}${iterator2}){` +
-      `return ${genScopedSlot(key, el, state)}` +
-    '})'
+    }}`;
+  // reverse proxy v-slot without scope on this.$slots
+  const reverseProxy = slotScope ? `` : `,proxy:true`;
+  return `{key:${el.slotTarget || `"default"`},fn:${fn}${reverseProxy}}`
 }
 
 function genChildren (
@@ -10241,7 +11436,10 @@ function genChildren (
       el.tag !== 'template' &&
       el.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el, state)
+      const normalizationType = checkSkip
+        ? state.maybeComponent(el) ? `,1` : `,0`
+        : ``;
+      return `${(altGenElement || genElement)(el, state)}${normalizationType}`
     }
     const normalizationType = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
@@ -10287,7 +11485,7 @@ function needsNormalization (el) {
 function genNode (node, state) {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -10308,8 +11506,15 @@ function genComment (comment) {
 function genSlot (el, state) {
   const slotName = el.slotName || '"default"';
   const children = genChildren(el, state);
-  let res = `_t(${slotName}${children ? `,${children}` : ''}`;
-  const attrs = el.attrs && `{${el.attrs.map(a => `${camelize(a.name)}:${a.value}`).join(',')}}`;
+  let res = `_t(${slotName}${children ? `,function(){return ${children}}` : ''}`;
+  const attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(attr => ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      })))
+    : null;
   const bind$$1 = el.attrsMap['v-bind'];
   if ((attrs || bind$$1) && !children) {
     res += `,null`;
@@ -10336,12 +11541,23 @@ function genComponent (
 }
 
 function genProps (props) {
-  let res = '';
+  let staticProps = ``;
+  let dynamicProps = ``;
   for (let i = 0; i < props.length; i++) {
     const prop = props[i];
-    res += `"${prop.name}":${transformSpecialNewlines(prop.value)},`;
+    const value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += `${prop.name},${value},`;
+    } else {
+      staticProps += `"${prop.name}":${value},`;
+    }
+  }
+  staticProps = `{${staticProps.slice(0, -1)}}`;
+  if (dynamicProps) {
+    return `_d(${staticProps},[${dynamicProps.slice(0, -1)}])`
+  } else {
+    return staticProps
   }
-  return res.slice(0, -1)
 }
 
 // #3895, #4268
@@ -10353,6 +11569,8 @@ function transformSpecialNewlines (text) {
 
 /*  */
 
+
+
 // these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 const prohibitedKeywordRE = new RegExp('\\b' + (
@@ -10370,96 +11588,167 @@ const unaryOperatorsRE = new RegExp('\\b' + (
 const stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
 // detect problematic expressions in a template
-function detectErrors (ast) {
-  const errors = [];
+function detectErrors (ast, warn) {
   if (ast) {
-    checkNode(ast, errors);
+    checkNode(ast, warn);
   }
-  return errors
 }
 
-function checkNode (node, errors) {
+function checkNode (node, warn) {
   if (node.type === 1) {
     for (const name in node.attrsMap) {
       if (dirRE.test(name)) {
         const value = node.attrsMap[name];
         if (value) {
+          const range = node.rawAttrsMap[name];
           if (name === 'v-for') {
-            checkFor(node, `v-for="${value}"`, errors);
+            checkFor(node, `v-for="${value}"`, warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, `${name}="${value}"`, warn, range);
           } else if (onRE.test(name)) {
-            checkEvent(value, `${name}="${value}"`, errors);
+            checkEvent(value, `${name}="${value}"`, warn, range);
           } else {
-            checkExpression(value, `${name}="${value}"`, errors);
+            checkExpression(value, `${name}="${value}"`, warn, range);
           }
         }
       }
     }
     if (node.children) {
       for (let i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+        checkNode(node.children[i], warn);
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
+    checkExpression(node.expression, node.text, warn, node);
   }
 }
 
-function checkEvent (exp, text, errors) {
-  const stipped = exp.replace(stripStringRE, '');
-  const keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp, text, warn, range) {
+  const stripped = exp.replace(stripStringRE, '');
+  const keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
       `avoid using JavaScript unary operator as property name: ` +
-      `"${keywordMatch[0]}" in expression ${text.trim()}`
+      `"${keywordMatch[0]}" in expression ${text.trim()}`,
+      range
     );
   }
-  checkExpression(exp, text, errors);
+  checkExpression(exp, text, warn, range);
 }
 
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
 }
 
 function checkIdentifier (
   ident,
   type,
   text,
-  errors
+  warn,
+  range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(`var ${ident}=_`);
     } catch (e) {
-      errors.push(`invalid ${type} "${ident}" in expression: ${text.trim()}`);
+      warn(`invalid ${type} "${ident}" in expression: ${text.trim()}`, range);
     }
   }
 }
 
-function checkExpression (exp, text, errors) {
+function checkExpression (exp, text, warn, range) {
   try {
     new Function(`return ${exp}`);
   } catch (e) {
     const keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
     if (keywordMatch) {
-      errors.push(
+      warn(
         `avoid using JavaScript keyword as property name: ` +
-        `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`
+        `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`,
+        range
       );
     } else {
-      errors.push(
+      warn(
         `invalid expression: ${e.message} in\n\n` +
         `    ${exp}\n\n` +
-        `  Raw expression: ${text.trim()}\n`
+        `  Raw expression: ${text.trim()}\n`,
+        range
       );
     }
   }
 }
 
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      `invalid function parameter expression: ${e.message} in\n\n` +
+      `    ${exp}\n\n` +
+      `  Raw expression: ${text.trim()}\n`,
+      range
+    );
+  }
+}
+
+/*  */
+
+const range = 2;
+
+function generateCodeFrame (
+  source,
+  start = 0,
+  end = source.length
+) {
+  const lines = source.split(/\r?\n/);
+  let count = 0;
+  const res = [];
+  for (let i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (let j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) continue
+        res.push(`${j + 1}${repeat(` `, 3 - String(j + 1).length)}|  ${lines[j]}`);
+        const lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          const pad = start - (count - lineLength) + 1;
+          const length = end > count ? lineLength - pad : end - start;
+          res.push(`   |  ` + repeat(` `, pad) + repeat(`^`, length));
+        } else if (j > i) {
+          if (end > count) {
+            const length = Math.min(end - count, lineLength);
+            res.push(`   |  ` + repeat(`^`, length));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat (str, n) {
+  let result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) result += str;
+      n >>>= 1;
+      if (n <= 0) break
+      str += str;
+    }
+  }
+  return result
+}
+
 /*  */
 
+
+
 function createFunction (code, errors) {
   try {
     return new Function(code)
@@ -10513,14 +11802,28 @@ function createCompileToFunctionFn (compile) {
     // check compilation errors/tips
     {
       if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          `Error compiling template:\n\n${template}\n\n` +
-          compiled.errors.map(e => `- ${e}`).join('\n') + '\n',
-          vm
-        );
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(e => {
+            warn$$1(
+              `Error compiling template:\n\n${e.msg}\n\n` +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            `Error compiling template:\n\n${template}\n\n` +
+            compiled.errors.map(e => `- ${e}`).join('\n') + '\n',
+            vm
+          );
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(msg => tip(msg, vm));
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(e => tip(e.msg, vm));
+        } else {
+          compiled.tips.forEach(msg => tip(msg, vm));
+        }
       }
     }
 
@@ -10561,11 +11864,29 @@ function createCompilerCreator (baseCompile) {
       const finalOptions = Object.create(baseOptions);
       const errors = [];
       const tips = [];
-      finalOptions.warn = (msg, tip) => {
+
+      let warn = (msg, range, tip) => {
         (tip ? tips : errors).push(msg);
       };
 
       if (options) {
+        if (options.outputSourceRange) {
+          // $flow-disable-line
+          const leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = (msg, range, tip) => {
+            const data = { msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -10574,7 +11895,7 @@ function createCompilerCreator (baseCompile) {
         // merge custom directives
         if (options.directives) {
           finalOptions.directives = extend(
-            Object.create(baseOptions.directives),
+            Object.create(baseOptions.directives || null),
             options.directives
           );
         }
@@ -10586,9 +11907,11 @@ function createCompilerCreator (baseCompile) {
         }
       }
 
-      const compiled = baseCompile(template, finalOptions);
+      finalOptions.warn = warn;
+
+      const compiled = baseCompile(template.trim(), finalOptions);
       {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        detectErrors(compiled.ast, warn);
       }
       compiled.errors = errors;
       compiled.tips = tips;
@@ -10612,7 +11935,9 @@ const createCompiler = createCompilerCreator(function baseCompile (
   options
 ) {
   const ast = parse(template.trim(), options);
-  optimize(ast, options);
+  if (options.optimize !== false) {
+    optimize(ast, options);
+  }
   const code = generate(ast, options);
   return {
     ast,
@@ -10647,8 +11972,8 @@ const idToTemplate = cached(id => {
   return el && el.innerHTML
 });
 
-const mount = Vue$3.prototype.$mount;
-Vue$3.prototype.$mount = function (
+const mount = Vue.prototype.$mount;
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -10656,7 +11981,7 @@ Vue$3.prototype.$mount = function (
 
   /* istanbul ignore if */
   if (el === document.body || el === document.documentElement) {
-    "development" !== 'production' && warn(
+    warn(
       `Do not mount Vue to <html> or <body> - mount to normal elements instead.`
     );
     return this
@@ -10671,7 +11996,7 @@ Vue$3.prototype.$mount = function (
         if (template.charAt(0) === '#') {
           template = idToTemplate(template);
           /* istanbul ignore if */
-          if ("development" !== 'production' && !template) {
+          if (!template) {
             warn(
               `Template element not found or is empty: ${options.template}`,
               this
@@ -10691,11 +12016,12 @@ Vue$3.prototype.$mount = function (
     }
     if (template) {
       /* istanbul ignore if */
-      if ("development" !== 'production' && config.performance && mark) {
+      if (config.performance && mark) {
         mark('compile');
       }
 
       const { render, staticRenderFns } = compileToFunctions(template, {
+        outputSourceRange: "development" !== 'production',
         shouldDecodeNewlines,
         shouldDecodeNewlinesForHref,
         delimiters: options.delimiters,
@@ -10705,7 +12031,7 @@ Vue$3.prototype.$mount = function (
       options.staticRenderFns = staticRenderFns;
 
       /* istanbul ignore if */
-      if ("development" !== 'production' && config.performance && mark) {
+      if (config.performance && mark) {
         mark('compile end');
         measure(`vue ${this._name} compile`, 'compile', 'compile end');
       }
@@ -10728,6 +12054,6 @@ function getOuterHTML (el) {
   }
 }
 
-Vue$3.compile = compileToFunctions;
+Vue.compile = compileToFunctions;
 
-export default Vue$3;
+export default Vue;
diff --git a/dist/vue.esm.browser.min.js b/dist/vue.esm.browser.min.js
new file mode 100644
index 00000000000..882a8ac5dc4
--- /dev/null
+++ b/dist/vue.esm.browser.min.js
@@ -0,0 +1,6 @@
+/*!
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
+ * Released under the MIT License.
+ */
+const t=Object.freeze({});function e(t){return null==t}function n(t){return null!=t}function o(t){return!0===t}function r(t){return"string"==typeof t||"number"==typeof t||"symbol"==typeof t||"boolean"==typeof t}function s(t){return null!==t&&"object"==typeof t}const i=Object.prototype.toString;function a(t){return"[object Object]"===i.call(t)}function c(t){const e=parseFloat(String(t));return e>=0&&Math.floor(e)===e&&isFinite(t)}function l(t){return n(t)&&"function"==typeof t.then&&"function"==typeof t.catch}function u(t){return null==t?"":Array.isArray(t)||a(t)&&t.toString===i?JSON.stringify(t,null,2):String(t)}function f(t){const e=parseFloat(t);return isNaN(e)?t:e}function d(t,e){const n=Object.create(null),o=t.split(",");for(let t=0;t<o.length;t++)n[o[t]]=!0;return e?t=>n[t.toLowerCase()]:t=>n[t]}const p=d("slot,component",!0),h=d("key,ref,slot,slot-scope,is");function m(t,e){if(t.length){const n=t.indexOf(e);if(n>-1)return t.splice(n,1)}}const y=Object.prototype.hasOwnProperty;function g(t,e){return y.call(t,e)}function v(t){const e=Object.create(null);return function(n){return e[n]||(e[n]=t(n))}}const $=/-(\w)/g,_=v(t=>t.replace($,(t,e)=>e?e.toUpperCase():"")),b=v(t=>t.charAt(0).toUpperCase()+t.slice(1)),w=/\B([A-Z])/g,C=v(t=>t.replace(w,"-$1").toLowerCase());const x=Function.prototype.bind?function(t,e){return t.bind(e)}:function(t,e){function n(n){const o=arguments.length;return o?o>1?t.apply(e,arguments):t.call(e,n):t.call(e)}return n._length=t.length,n};function k(t,e){e=e||0;let n=t.length-e;const o=new Array(n);for(;n--;)o[n]=t[n+e];return o}function A(t,e){for(const n in e)t[n]=e[n];return t}function O(t){const e={};for(let n=0;n<t.length;n++)t[n]&&A(e,t[n]);return e}function S(t,e,n){}const T=(t,e,n)=>!1,N=t=>t;function E(t,e){if(t===e)return!0;const n=s(t),o=s(e);if(!n||!o)return!n&&!o&&String(t)===String(e);try{const n=Array.isArray(t),o=Array.isArray(e);if(n&&o)return 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t.pre&&(e.pre=t.pre),e.staticRenderFns.push(`with(this){return ${Li(t,e)}}`),e.pre=n,`_m(${e.staticRenderFns.length-1}${t.staticInFor?",true":""})`}function Mi(t,e){if(t.onceProcessed=!0,t.if&&!t.ifProcessed)return Fi(t,e);if(t.staticInFor){let n="",o=t.parent;for(;o;){if(o.for){n=o.key;break}o=o.parent}return n?`_o(${Li(t,e)},${e.onceId++},${n})`:Li(t,e)}return Ii(t,e)}function Fi(t,e,n,o){return t.ifProcessed=!0,function t(e,n,o,r){if(!e.length)return r||"_e()";const s=e.shift();return s.exp?`(${s.exp})?${i(s.block)}:${t(e,n,o,r)}`:`${i(s.block)}`;function i(t){return o?o(t,n):t.once?Mi(t,n):Li(t,n)}}(t.ifConditions.slice(),e,n,o)}function Pi(t,e,n,o){const r=t.for,s=t.alias,i=t.iterator1?`,${t.iterator1}`:"",a=t.iterator2?`,${t.iterator2}`:"";return t.forProcessed=!0,`${o||"_l"}((${r}),`+`function(${s}${i}${a}){`+`return ${(n||Li)(t,e)}`+"})"}function Ri(t,e){let n="{";const o=function(t,e){const n=t.directives;if(!n)return;let o,r,s,i,a="directives:[",c=!1;for(o=0,r=n.length;o<r;o++){s=n[o],i=!0;const r=e.directives[s.name];r&&(i=!!r(t,s,e.warn)),i&&(c=!0,a+=`{name:"${s.name}",rawName:"${s.rawName}"${s.value?`,value:(${s.value}),expression:${JSON.stringify(s.value)}`:""}${s.arg?`,arg:${s.isDynamicArg?s.arg:`"${s.arg}"`}`:""}${s.modifiers?`,modifiers:${JSON.stringify(s.modifiers)}`:""}},`)}if(c)return a.slice(0,-1)+"]"}(t,e);o&&(n+=o+","),t.key&&(n+=`key:${t.key},`),t.ref&&(n+=`ref:${t.ref},`),t.refInFor&&(n+="refInFor:true,"),t.pre&&(n+="pre:true,"),t.component&&(n+=`tag:"${t.tag}",`);for(let o=0;o<e.dataGenFns.length;o++)n+=e.dataGenFns[o](t);if(t.attrs&&(n+=`attrs:${Ki(t.attrs)},`),t.props&&(n+=`domProps:${Ki(t.props)},`),t.events&&(n+=`${Si(t.events,!1)},`),t.nativeEvents&&(n+=`${Si(t.nativeEvents,!0)},`),t.slotTarget&&!t.slotScope&&(n+=`slot:${t.slotTarget},`),t.scopedSlots&&(n+=`${function(t,e,n){let o=t.for||Object.keys(e).some(t=>{const n=e[t];return n.slotTargetDynamic||n.if||n.for||Hi(n)}),r=!!t.if;if(!o){let e=t.parent;for(;e;){if(e.slotScope&&e.slotScope!==Zs||e.for){o=!0;break}e.if&&(r=!0),e=e.parent}}const s=Object.keys(e).map(t=>Bi(e[t],n)).join(",");return`scopedSlots:_u([${s}]${o?",null,true":""}${!o&&r?`,null,false,${function(t){let e=5381,n=t.length;for(;n;)e=33*e^t.charCodeAt(--n);return e>>>0}(s)}`:""})`}(t,t.scopedSlots,e)},`),t.model&&(n+=`model:{value:${t.model.value},callback:${t.model.callback},expression:${t.model.expression}},`),t.inlineTemplate){const o=function(t,e){const n=t.children[0];if(n&&1===n.type){const t=Di(n,e.options);return`inlineTemplate:{render:function(){${t.render}},staticRenderFns:[${t.staticRenderFns.map(t=>`function(){${t}}`).join(",")}]}`}}(t,e);o&&(n+=`${o},`)}return n=n.replace(/,$/,"")+"}",t.dynamicAttrs&&(n=`_b(${n},"${t.tag}",${Ki(t.dynamicAttrs)})`),t.wrapData&&(n=t.wrapData(n)),t.wrapListeners&&(n=t.wrapListeners(n)),n}function Hi(t){return 1===t.type&&("slot"===t.tag||t.children.some(Hi))}function Bi(t,e){const n=t.attrsMap["slot-scope"];if(t.if&&!t.ifProcessed&&!n)return Fi(t,e,Bi,"null");if(t.for&&!t.forProcessed)return Pi(t,e,Bi);const o=t.slotScope===Zs?"":String(t.slotScope),r=`function(${o}){`+`return ${"template"===t.tag?t.if&&n?`(${t.if})?${Ui(t,e)||"undefined"}:undefined`:Ui(t,e)||"undefined":Li(t,e)}}`,s=o?"":",proxy:true";return`{key:${t.slotTarget||'"default"'},fn:${r}${s}}`}function Ui(t,e,n,o,r){const s=t.children;if(s.length){const t=s[0];if(1===s.length&&t.for&&"template"!==t.tag&&"slot"!==t.tag){const r=n?e.maybeComponent(t)?",1":",0":"";return`${(o||Li)(t,e)}${r}`}const i=n?function(t,e){let n=0;for(let o=0;o<t.length;o++){const r=t[o];if(1===r.type){if(Vi(r)||r.ifConditions&&r.ifConditions.some(t=>Vi(t.block))){n=2;break}(e(r)||r.ifConditions&&r.ifConditions.some(t=>e(t.block)))&&(n=1)}}return n}(s,e.maybeComponent):0,a=r||zi;return`[${s.map(t=>a(t,e)).join(",")}]${i?`,${i}`:""}`}}function Vi(t){return void 0!==t.for||"template"===t.tag||"slot"===t.tag}function zi(t,e){return 1===t.type?Li(t,e):3===t.type&&t.isComment?(o=t,`_e(${JSON.stringify(o.text)})`):`_v(${2===(n=t).type?n.expression:Ji(JSON.stringify(n.text))})`;var n,o}function Ki(t){let e="",n="";for(let o=0;o<t.length;o++){const r=t[o],s=Ji(r.value);r.dynamic?n+=`${r.name},${s},`:e+=`"${r.name}":${s},`}return e=`{${e.slice(0,-1)}}`,n?`_d(${e},[${n.slice(0,-1)}])`:e}function Ji(t){return t.replace(/\u2028/g,"\\u2028").replace(/\u2029/g,"\\u2029")}new RegExp("\\b"+"do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,super,throw,while,yield,delete,export,import,return,switch,default,extends,finally,continue,debugger,function,arguments".split(",").join("\\b|\\b")+"\\b");function qi(t,e){try{return new Function(t)}catch(n){return e.push({err:n,code:t}),S}}function Wi(t){const e=Object.create(null);return function(n,o,r){(o=A({},o)).warn;delete o.warn;const s=o.delimiters?String(o.delimiters)+n:n;if(e[s])return e[s];const i=t(n,o),a={},c=[];return a.render=qi(i.render,c),a.staticRenderFns=i.staticRenderFns.map(t=>qi(t,c)),e[s]=a}}const Zi=(Gi=function(t,e){const n=si(t.trim(),e);!1!==e.optimize&&_i(n,e);const o=Di(n,e);return{ast:n,render:o.render,staticRenderFns:o.staticRenderFns}},function(t){function e(e,n){const o=Object.create(t),r=[],s=[];if(n){n.modules&&(o.modules=(t.modules||[]).concat(n.modules)),n.directives&&(o.directives=A(Object.create(t.directives||null),n.directives));for(const t in n)"modules"!==t&&"directives"!==t&&(o[t]=n[t])}o.warn=((t,e,n)=>{(n?s:r).push(t)});const i=Gi(e.trim(),o);return i.errors=r,i.tips=s,i}return{compile:e,compileToFunctions:Wi(e)}});var Gi;const{compile:Xi,compileToFunctions:Yi}=Zi(yi);let Qi;function ta(t){return(Qi=Qi||document.createElement("div")).innerHTML=t?'<a href="\n"/>':'<div a="\n"/>',Qi.innerHTML.indexOf("&#10;")>0}const ea=!!V&&ta(!1),na=!!V&&ta(!0),oa=v(t=>{const e=qn(t);return e&&e.innerHTML}),ra=gn.prototype.$mount;gn.prototype.$mount=function(t,e){if((t=t&&qn(t))===document.body||t===document.documentElement)return this;const n=this.$options;if(!n.render){let e=n.template;if(e)if("string"==typeof e)"#"===e.charAt(0)&&(e=oa(e));else{if(!e.nodeType)return this;e=e.innerHTML}else t&&(e=function(t){if(t.outerHTML)return t.outerHTML;{const e=document.createElement("div");return e.appendChild(t.cloneNode(!0)),e.innerHTML}}(t));if(e){const{render:t,staticRenderFns:o}=Yi(e,{outputSourceRange:!1,shouldDecodeNewlines:ea,shouldDecodeNewlinesForHref:na,delimiters:n.delimiters,comments:n.comments},this);n.render=t,n.staticRenderFns=o}}return ra.call(this,t,e)},gn.compile=Yi;export default gn;
\ No newline at end of file
diff --git a/dist/vue.esm.js b/dist/vue.esm.js
index 399ecae7c4a..70ccde96ce4 100644
--- a/dist/vue.esm.js
+++ b/dist/vue.esm.js
@@ -1,14 +1,14 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 /*  */
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 function isUndef (v) {
   return v === undefined || v === null
 }
@@ -26,7 +26,7 @@ function isFalse (v) {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 function isPrimitive (value) {
   return (
@@ -48,7 +48,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -76,19 +76,27 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 function toString (val) {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {
@@ -120,12 +128,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -137,7 +145,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -179,9 +187,15 @@ var hyphenate = cached(function (str) {
 });
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
-function bind (fn, ctx) {
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
   function boundFn (a) {
     var l = arguments.length;
     return l
@@ -190,11 +204,19 @@ function bind (fn, ctx) {
         : fn.call(ctx, a)
       : fn.call(ctx)
   }
-  // record original fn length
+
   boundFn._length = fn.length;
   return boundFn
 }
 
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
 /**
  * Convert an Array-like object to a real Array.
  */
@@ -231,10 +253,12 @@ function toObject (arr) {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -243,13 +267,15 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 var identity = function (_) { return _; };
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 function genStaticKeys (modules) {
   return modules.reduce(function (keys, m) {
@@ -273,6 +299,8 @@ function looseEqual (a, b) {
         return a.length === b.length && a.every(function (e, i) {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         var keysA = Object.keys(a);
         var keysB = Object.keys(b);
@@ -294,6 +322,11 @@ function looseEqual (a, b) {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 function looseIndexOf (arr, val) {
   for (var i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) { return i }
@@ -333,11 +366,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -420,6 +456,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -428,6 +470,13 @@ var config = ({
 
 /*  */
 
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
 /**
  * Check if a string starts with $ or _
  */
@@ -451,7 +500,7 @@ function def (obj, key, val, enumerable) {
 /**
  * Parse simple path.
  */
-var bailRE = /[^\w.$]/;
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
 function parsePath (path) {
   if (bailRE.test(path)) {
     return
@@ -468,7 +517,6 @@ function parsePath (path) {
 
 /*  */
 
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -483,6 +531,8 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
@@ -507,10 +557,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -537,7 +587,7 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
   _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
+  _Set = /*@__PURE__*/(function () {
     function Set () {
       this.set = Object.create(null);
     }
@@ -595,7 +645,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -651,7 +701,6 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
 var uid = 0;
 
 /**
@@ -680,24 +729,31 @@ Dep.prototype.depend = function depend () {
 Dep.prototype.notify = function notify () {
   // stabilize the subscriber list first
   var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
   for (var i = 0, l = subs.length; i < l; i++) {
     subs[i].update();
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 var targetStack = [];
 
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
 }
 
 function popTarget () {
-  Dep.target = targetStack.pop();
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
 }
 
 /*  */
@@ -764,16 +820,18 @@ function createTextVNode (val) {
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
 // on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
+function cloneVNode (vnode) {
   var cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
-    componentOptions,
+    vnode.componentOptions,
     vnode.asyncFactory
   );
   cloned.ns = vnode.ns;
@@ -783,34 +841,20 @@ function cloneVNode (vnode, deep) {
   cloned.fnContext = vnode.fnContext;
   cloned.fnOptions = vnode.fnOptions;
   cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
   cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
   return cloned
 }
 
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -818,7 +862,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -849,20 +898,20 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -870,10 +919,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -881,14 +931,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -904,17 +954,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -938,7 +988,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -955,7 +1005,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -972,6 +1022,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -1000,6 +1053,8 @@ function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1017,6 +1072,11 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1038,7 +1098,7 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
@@ -1047,6 +1107,11 @@ function set (target, key, val) {
  * Delete a property and trigger change if necessary.
  */
 function del (target, key) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.splice(key, 1);
     return
@@ -1113,14 +1178,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1201,13 +1276,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -1318,11 +1406,10 @@ function checkComponents (options) {
 }
 
 function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
     warn(
       'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
+      'should conform to valid custom element name in html5 specification.'
     );
   }
   if (isBuiltInTag(name) || config.isReservedTag(name)) {
@@ -1405,9 +1492,9 @@ function normalizeDirectives (options) {
   var dirs = options.directives;
   if (dirs) {
     for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
       }
     }
   }
@@ -1443,15 +1530,22 @@ function mergeOptions (
   normalizeProps(child, vm);
   normalizeInject(child, vm);
   normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
     }
   }
+
   var options = {};
   var key;
   for (key in parent) {
@@ -1504,6 +1598,8 @@ function resolveAsset (
 
 /*  */
 
+
+
 function validateProp (
   key,
   propOptions,
@@ -1513,12 +1609,18 @@ function validateProp (
   var prop = propOptions[key];
   var absent = !hasOwn(propsData, key);
   var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
     }
   }
   // check default value
@@ -1526,15 +1628,15 @@ function validateProp (
     value = getPropDefaultValue(vm, prop, key);
     // since the default value is a fresh copy,
     // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
     observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+    toggleObserving(prevShouldObserve);
   }
   if (
     process.env.NODE_ENV !== 'production' &&
     // skip validation for weex recycle-list child component props
-    !(false && isObject(value) && ('@binding' in value))
+    !(false)
   ) {
     assertProp(prop, key, value, vm, absent);
   }
@@ -1602,16 +1704,16 @@ function assertProp (
       type = [type];
     }
     for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
+      var assertedType = assertType(value, type[i], vm);
       expectedTypes.push(assertedType.expectedType || '');
       valid = assertedType.valid;
     }
   }
-  if (!valid) {
+
+  var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+  if (!valid && haveExpectedTypes) {
     warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     );
     return
@@ -1627,9 +1729,9 @@ function assertProp (
   }
 }
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
 
-function assertType (value, type) {
+function assertType (value, type, vm) {
   var valid;
   var expectedType = getType(type);
   if (simpleCheckRE.test(expectedType)) {
@@ -1644,7 +1746,12 @@ function assertType (value, type) {
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value);
   } else {
-    valid = value instanceof type;
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
   }
   return {
     valid: valid,
@@ -1652,49 +1759,127 @@ function assertType (value, type) {
   }
 }
 
+var functionTypeCheckRE = /^\s*function (\w+)/;
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  var match = fn && fn.toString().match(functionTypeCheckRE);
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += " with value " + (styleValue(value, expectedType));
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + (styleValue(value, receivedType)) + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
 }
 
 /*  */
 
 function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
   }
-  globalHandleError(err, vm, info);
+  return res
 }
 
 function globalHandleError (err, vm, info) {
@@ -1702,7 +1887,11 @@ function globalHandleError (err, vm, info) {
     try {
       return config.errorHandler.call(null, err, vm, info)
     } catch (e) {
-      logError(e, null, 'config.errorHandler');
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
     }
   }
   logError(err, vm, info);
@@ -1721,7 +1910,8 @@ function logError (err, vm, info) {
 }
 
 /*  */
-/* globals MessageChannel */
+
+var isUsingMicroTask = false;
 
 var callbacks = [];
 var pending = false;
@@ -1735,74 +1925,69 @@ function flushCallbacks () {
   }
 }
 
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
 if (typeof Promise !== 'undefined' && isNative(Promise)) {
   var p = Promise.resolve();
-  microTimerFunc = function () {
+  timerFunc = function () {
     p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
     // it can get stuck in a weird state where callbacks are pushed into the
     // microtask queue but the queue isn't being flushed, until the browser
     // needs to do some other work, e.g. handle a timer. Therefore we can
     // "force" the microtask queue to be flushed by adding an empty timer.
     if (isIOS) { setTimeout(noop); }
   };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
 } else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
 }
 
 function nextTick (cb, ctx) {
@@ -1820,11 +2005,7 @@ function nextTick (cb, ctx) {
   });
   if (!pending) {
     pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
+    timerFunc();
   }
   // $flow-disable-line
   if (!cb && typeof Promise !== 'undefined') {
@@ -1854,7 +2035,7 @@ if (process.env.NODE_ENV !== 'production') {
       perf.measure(name, startTag, endTag);
       perf.clearMarks(startTag);
       perf.clearMarks(endTag);
-      perf.clearMeasures(name);
+      // perf.clearMeasures(name)
     };
   }
 }
@@ -1867,7 +2048,7 @@ if (process.env.NODE_ENV !== 'production') {
   var allowedGlobals = makeMap(
     'Infinity,undefined,NaN,isFinite,isNaN,' +
     'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
     'require' // for Webpack/Browserify
   );
 
@@ -1882,9 +2063,18 @@ if (process.env.NODE_ENV !== 'production') {
     );
   };
 
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
   var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    typeof Proxy !== 'undefined' && isNative(Proxy);
 
   if (hasProxy) {
     var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
@@ -1904,9 +2094,11 @@ if (process.env.NODE_ENV !== 'production') {
   var hasHandler = {
     has: function has (target, key) {
       var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
       if (!has && !isAllowed) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return has || !isAllowed
     }
@@ -1915,7 +2107,8 @@ if (process.env.NODE_ENV !== 'production') {
   var getHandler = {
     get: function get (target, key) {
       if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return target[key]
     }
@@ -1952,7 +2145,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
     return
   }
   if (val.__ob__) {
@@ -1989,7 +2182,7 @@ var normalizeEvent = cached(function (name) {
   }
 });
 
-function createFnInvoker (fns) {
+function createFnInvoker (fns, vm) {
   function invoker () {
     var arguments$1 = arguments;
 
@@ -1997,11 +2190,11 @@ function createFnInvoker (fns) {
     if (Array.isArray(fns)) {
       var cloned = fns.slice();
       for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
     }
   }
   invoker.fns = fns;
@@ -2013,14 +2206,14 @@ function updateListeners (
   oldOn,
   add,
   remove$$1,
+  createOnceHandler,
   vm
 ) {
-  var name, def, cur, old, event;
+  var name, def$$1, cur, old, event;
   for (name in on) {
-    def = cur = on[name];
+    def$$1 = cur = on[name];
     old = oldOn[name];
     event = normalizeEvent(name);
-    /* istanbul ignore if */
     if (isUndef(cur)) {
       process.env.NODE_ENV !== 'production' && warn(
         "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
@@ -2028,9 +2221,12 @@ function updateListeners (
       );
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+        cur = on[name] = createFnInvoker(cur, vm);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
     } else if (cur !== old) {
       old.fns = cur;
       on[name] = old;
@@ -2236,293 +2432,75 @@ function normalizeArrayChildren (children, nestedIndex) {
 
 /*  */
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
   }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
 }
 
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production') {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      } else {
+        defineReactive$$1(vm, key, result[key]);
+      }
+    });
+    toggleObserving(true);
   }
+}
 
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
 
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else if (process.env.NODE_ENV !== 'production') {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
   }
+}
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
-
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-var target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    if (process.env.NODE_ENV !== 'production') {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
-      }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
+/*  */
 
 
 
@@ -2533,10 +2511,10 @@ function resolveSlots (
   children,
   context
 ) {
-  var slots = {};
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  var slots = {};
   for (var i = 0, l = children.length; i < l; i++) {
     var child = children[i];
     var data = child.data;
@@ -2573,1456 +2551,1881 @@ function isWhitespace (node) {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
 ) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
     }
   }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
   return res
 }
 
-/*  */
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    var vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
 
-var activeInstance = null;
-var isUpdatingChildComponent = false;
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
 
-function initLifecycle (vm) {
-  var options = vm.$options;
+/*  */
 
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
     }
-    parent.$children.push(vm);
   }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
+/*  */
 
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  } else {
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
 }
 
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+  return eventKeyCode === undefined
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
       );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
     } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
 
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
 
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
+      for (var key in value) loop( key );
     }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
     }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
     }
-  };
+  }
+  return data
 }
 
-function mountComponent (
-  vm,
-  el,
-  hydrating
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
 ) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    if (process.env.NODE_ENV !== 'production') {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
       }
+      res[slot.key] = slot.fn;
     }
   }
-  callHook(vm, 'beforeMount');
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
 
-  var updateComponent;
-  /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
+/*  */
 
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
 
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
   } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
   }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
 
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
 
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
   }
-  return vm
 }
 
-function updateChildComponent (
-  vm,
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
   propsData,
-  listeners,
-  parentVnode,
-  renderChildren
+  data,
+  contextVm,
+  children
 ) {
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = true;
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
   }
 
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
   );
 
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+  var vnode = options.render.call(null, renderContext._c, renderContext);
 
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
   }
-  vm.$options._renderChildren = renderChildren;
+}
 
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
     }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
   }
+};
 
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+var hooksToMerge = Object.keys(componentVNodeHooks);
 
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = false;
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
   }
-}
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
-  }
-  return false
-}
+  var baseCtor = context.$options._base;
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
   }
-}
 
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    if (process.env.NODE_ENV !== 'production') {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
     }
-    callHook(vm, 'deactivated');
+    return
   }
-}
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
-      }
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
     }
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
 
-/*  */
+  data = data || {};
 
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
 
-var MAX_UPDATE_COUNT = 100;
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
 
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
 
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  if (process.env.NODE_ENV !== 'production') {
-    circular = {};
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
   }
-  waiting = flushing = false;
-}
 
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
 
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
 
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
-        );
-        break
-      }
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
     }
   }
 
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
-
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
-  }
-}
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
 
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
-  }
-}
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
+  return vnode
 }
 
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
+function createComponentInstanceForVnode (
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
   }
+  return new vnode.componentOptions.Ctor(options)
 }
 
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
-      }
-      queue.splice(i + 1, 0, watcher);
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
     }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
     }
+  } else {
+    on[event] = callback;
   }
 }
 
 /*  */
 
-var uid$2 = 0;
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
 ) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
   }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
-  } else {
-    this.deep = this.user = this.lazy = this.sync = false;
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
   }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = process.env.NODE_ENV !== 'production'
-    ? expOrFn.toString()
-    : '';
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
-  } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (process.env.NODE_ENV !== 'production' &&
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
       );
     }
   }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
-
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
-      throw e
-    }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
-    popTarget();
-    this.cleanupDeps();
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
   }
-  return value
-};
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
 
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
     }
   }
-};
+}
 
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
 
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
-    }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
 
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
   /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
+  if (process.env.NODE_ENV !== 'production') {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
   } else {
-    queueWatcher(this);
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, null, true);
   }
-};
+}
 
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
         try {
-          this.cb.call(this.vm, value, oldValue);
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
         } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
         }
       } else {
-        this.cb.call(this.vm, value, oldValue);
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
       }
+      vnode = createEmptyVNode();
     }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
   }
-};
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
 
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
 
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
 
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
+  if (isDef(factory.resolved)) {
+    return factory.resolved
   }
-};
 
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
 
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
-    }
-    this.active = false;
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
   }
-};
 
-/*  */
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
 
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
 
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
 
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
-  }
-}
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
 
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                process.env.NODE_ENV !== 'production'
+                  ? ("timeout (" + (res.timeout) + "ms)")
+                  : null
+              );
+            }
+          }, res.timeout);
         }
-      });
-    } else {
-      defineReactive(props, key, value);
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
+      }
     }
-  };
 
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
 }
 
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
       }
     }
-    if (props && hasOwn(props, key)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
-    }
   }
-  // observe data
-  observe(data, true /* asRootData */);
 }
 
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
   }
 }
 
-var computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
+var target;
 
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (process.env.NODE_ENV !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
-    }
+function add (event, fn) {
+  target.$on(event, fn);
+}
 
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
-    }
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
 
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else if (process.env.NODE_ENV !== 'production') {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
     }
   }
 }
 
-function defineComputed (
-  target,
-  key,
-  userDef
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
 ) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
 }
 
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
       }
-      if (Dep.target) {
-        watcher.depend();
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
       }
-      return watcher.value
     }
-  }
-}
+    return vm
+  };
 
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
       }
+      return vm
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
-  }
-}
-
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
       }
-    } else {
-      createWatcher(vm, key, handler);
     }
-  }
-}
-
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
-}
-
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
-  }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
-
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
+    return vm
+  };
 
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
+  Vue.prototype.$emit = function (event) {
     var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
+    if (process.env.NODE_ENV !== 'production') {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
     }
-    return function unwatchFn () {
-      watcher.teardown();
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
     }
+    return vm
   };
 }
 
 /*  */
 
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
+var activeInstance = null;
+var isUpdatingChildComponent = false;
 
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
-      } else {
-        defineReactive(vm, key, result[key]);
-      }
-    });
-    observerState.shouldConvert = true;
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
   }
 }
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
+function initLifecycle (vm) {
+  var options = vm.$options;
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
-      }
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
     }
-    return result
+    parent.$children.push(vm);
   }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
 }
 
-/*  */
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
 
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
     }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
     }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
     }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
 }
 
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
+function mountComponent (
+  vm,
+  el,
+  hydrating
 ) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    if (process.env.NODE_ENV !== 'production') {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
         warn(
-          'slot v-bind without argument expects an Object',
-          this
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
         );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
+      } else {
         warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
+          'Failed to mount component: template or render function not defined.',
+          vm
         );
       }
-      slotNodes._rendered = true;
     }
-    nodes = slotNodes || fallback;
   }
+  callHook(vm, 'beforeMount');
 
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
+  var updateComponent;
+  /* istanbul ignore if */
+  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
   } else {
-    return nodes
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
   }
-}
 
-/*  */
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
 }
 
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
 ) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = true;
   }
-}
 
-/*  */
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
 
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
 
-      for (var key in value) loop( key );
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
     }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
   }
-  return data
-}
 
-/*  */
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
 
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = false;
   }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
 }
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
 }
 
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
   }
 }
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
-
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
     }
   }
-  return data
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
 }
 
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
 }
 
 /*  */
 
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
+var MAX_UPDATE_COUNT = 100;
 
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
 
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  if (process.env.NODE_ENV !== 'production') {
+    circular = {};
   }
+  waiting = flushing = false;
+}
 
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
-      }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
   }
 }
 
-installRenderHelpers(FunctionalRenderContext.prototype);
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
 
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
     }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
   }
 
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
 
-  var vnode = options.render.call(null, renderContext._c, renderContext);
+  resetSchedulerState();
 
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
     }
   }
+}
 
-  return vnode
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
 }
 
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
   }
 }
 
@@ -4030,494 +4433,562 @@ function mergeProps (to, from) {
 
 
 
+var uid$2 = 0;
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
-
-
-// Updates the state of the component to weex native render engine.
-
-/*  */
-
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
-
-// listening on native callback
-
-/*  */
-
-/*  */
-
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = process.env.NODE_ENV !== 'production'
+    ? expOrFn.toString()
+    : '';
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
       );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
 
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
     }
-  },
-
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
-      }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
     }
+    popTarget();
+    this.cleanupDeps();
   }
+  return value
 };
 
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  var baseCtor = context.$options._base;
-
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
-
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
     }
-    return
   }
+};
 
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
     }
   }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
 
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
 
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        var info = "callback for watcher \"" + (this.expression) + "\"";
+        invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
   }
+};
 
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
 
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
   }
+};
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
-
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
-
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
     }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
   }
+};
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
+/*  */
 
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
 
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
 }
 
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
   }
-  return new vnode.componentOptions.Ctor(options)
 }
 
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
   }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    } else {
+      defineReactive$$1(props, key, value);
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
 }
 
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    process.env.NODE_ENV !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
   }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    if (process.env.NODE_ENV !== 'production') {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
 }
 
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
   }
 }
 
-/*  */
+var computedWatcherOptions = { lazy: true };
 
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
 
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (process.env.NODE_ENV !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else if (process.env.NODE_ENV !== 'production') {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+      }
+    }
   }
-  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
+function defineComputed (
+  target,
+  key,
+  userDef
 ) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
   }
-  // warn against non-primitive key
   if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
       warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
       );
-    }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
+    };
   }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
   }
 }
 
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
   }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
       }
     }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
   }
 }
 
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  } else {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, null, true);
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
   }
 }
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
-
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
-
-  Vue.prototype._render = function () {
-    var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
 
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
-    }
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  if (process.env.NODE_ENV !== 'production') {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
 
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      } else {
-        vnode = vm._vnode;
-      }
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
     }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+      pushTarget();
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+      popTarget();
+    }
+    return function unwatchFn () {
+      watcher.teardown();
     }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
   };
 }
 
 /*  */
 
-var uid$1 = 0;
+var uid$3 = 0;
 
 function initMixin (Vue) {
   Vue.prototype._init = function (options) {
     var vm = this;
     // a uid
-    vm._uid = uid$1++;
+    vm._uid = uid$3++;
 
     var startTag, endTag;
     /* istanbul ignore if */
@@ -4578,8 +5049,6 @@ function initInternalComponent (vm, options) {
   var parentVnode = options._parentVnode;
   opts.parent = options.parent;
   opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
 
   var vnodeComponentOptions = parentVnode.componentOptions;
   opts.propsData = vnodeComponentOptions.propsData;
@@ -4620,50 +5089,30 @@ function resolveConstructorOptions (Ctor) {
 function resolveModifiedOptions (Ctor) {
   var modified;
   var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
   var sealed = Ctor.sealedOptions;
   for (var key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+      modified[key] = latest[key];
     }
   }
   return modified
 }
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
+function Vue (options) {
   if (process.env.NODE_ENV !== 'production' &&
-    !(this instanceof Vue$3)
+    !(this instanceof Vue)
   ) {
     warn('Vue is a constructor and should be called with the `new` keyword');
   }
   this._init(options);
 }
 
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
 
 /*  */
 
@@ -4822,6 +5271,10 @@ function initAssetRegisters (Vue) {
 
 /*  */
 
+
+
+
+
 function getComponentName (opts) {
   return opts && (opts.Ctor.options.name || opts.tag)
 }
@@ -4843,9 +5296,9 @@ function pruneCache (keepAliveInstance, filter) {
   var keys = keepAliveInstance.keys;
   var _vnode = keepAliveInstance._vnode;
   for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
+    var entry = cache[key];
+    if (entry) {
+      var name = entry.name;
       if (name && !filter(name)) {
         pruneCacheEntry(cache, key, keys, _vnode);
       }
@@ -4859,9 +5312,9 @@ function pruneCacheEntry (
   keys,
   current
 ) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
+  var entry = cache[key];
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy();
   }
   cache[key] = null;
   remove(keys, key);
@@ -4879,26 +5332,57 @@ var KeepAlive = {
     max: [String, Number]
   },
 
+  methods: {
+    cacheVNode: function cacheVNode() {
+      var ref = this;
+      var cache = ref.cache;
+      var keys = ref.keys;
+      var vnodeToCache = ref.vnodeToCache;
+      var keyToCache = ref.keyToCache;
+      if (vnodeToCache) {
+        var tag = vnodeToCache.tag;
+        var componentInstance = vnodeToCache.componentInstance;
+        var componentOptions = vnodeToCache.componentOptions;
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag: tag,
+          componentInstance: componentInstance,
+        };
+        keys.push(keyToCache);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+        this.vnodeToCache = null;
+      }
+    }
+  },
+
   created: function created () {
     this.cache = Object.create(null);
     this.keys = [];
   },
 
   destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
     var this$1 = this;
 
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
-    }
+    this.cacheVNode();
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
   },
 
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
+  updated: function updated () {
+    this.cacheVNode();
   },
 
   render: function render () {
@@ -4934,12 +5418,9 @@ var KeepAlive = {
         remove(keys, key);
         keys.push(key);
       } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
+        // delay setting the cache until update
+        this.vnodeToCache = vnode;
+        this.keyToCache = key;
       }
 
       vnode.data.keepAlive = true;
@@ -4974,13 +5455,19 @@ function initGlobalAPI (Vue) {
     warn: warn,
     extend: extend,
     mergeOptions: mergeOptions,
-    defineReactive: defineReactive
+    defineReactive: defineReactive$$1
   };
 
   Vue.set = set;
   Vue.delete = del;
   Vue.nextTick = nextTick;
 
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
   Vue.options = Object.create(null);
   ASSET_TYPES.forEach(function (type) {
     Vue.options[type + 's'] = Object.create(null);
@@ -4998,20 +5485,25 @@ function initGlobalAPI (Vue) {
   initAssetRegisters(Vue);
 }
 
-initGlobalAPI(Vue$3);
+initGlobalAPI(Vue);
 
-Object.defineProperty(Vue$3.prototype, '$isServer', {
+Object.defineProperty(Vue.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
+Object.defineProperty(Vue.prototype, '$ssrContext', {
   get: function get () {
     /* istanbul ignore next */
     return this.$vnode && this.$vnode.ssrContext
   }
 });
 
-Vue$3.version = '2.5.13';
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.14';
 
 /*  */
 
@@ -5032,12 +5524,23 @@ var mustUseProp = function (tag, type, attr) {
 
 var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
 var isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 );
 
@@ -5161,7 +5664,7 @@ var isHTMLTag = makeMap(
 // contain child elements.
 var isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 );
@@ -5285,24 +5788,23 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
 }
 
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
 });
 
 /*  */
@@ -5324,7 +5826,7 @@ var ref = {
 
 function registerRef (vnode, isRemoval) {
   var key = vnode.data.ref;
-  if (!key) { return }
+  if (!isDef(key)) { return }
 
   var vm = vnode.context;
   var ref = vnode.componentInstance || vnode.elm;
@@ -5367,7 +5869,8 @@ var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
 
 function sameVnode (a, b) {
   return (
-    a.key === b.key && (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
       (
         a.tag === b.tag &&
         a.isComment === b.isComment &&
@@ -5375,7 +5878,6 @@ function sameVnode (a, b) {
         sameInputType(a, b)
       ) || (
         isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
         isUndef(b.asyncFactory.error)
       )
     )
@@ -5421,13 +5923,13 @@ function createPatchFunction (backend) {
   }
 
   function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
         removeNode(childElm);
       }
     }
-    remove.listeners = listeners;
-    return remove
+    remove$$1.listeners = listeners;
+    return remove$$1
   }
 
   function removeNode (el) {
@@ -5455,7 +5957,25 @@ function createPatchFunction (backend) {
   }
 
   var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     vnode.isRootInsert = !nested; // for transition enter check
     if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
       return
@@ -5478,6 +5998,7 @@ function createPatchFunction (backend) {
           );
         }
       }
+
       vnode.elm = vnode.ns
         ? nodeOps.createElementNS(vnode.ns, tag)
         : nodeOps.createElement(tag, vnode);
@@ -5509,7 +6030,7 @@ function createPatchFunction (backend) {
     if (isDef(i)) {
       var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
       if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
+        i(vnode, false /* hydrating */);
       }
       // after calling the init hook, if the vnode is a child component
       // it should've created a child instance and mounted it. the child
@@ -5517,6 +6038,7 @@ function createPatchFunction (backend) {
       // in that case we can just return the element and be done.
       if (isDef(vnode.componentInstance)) {
         initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
         if (isTrue(isReactivated)) {
           reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
         }
@@ -5568,7 +6090,7 @@ function createPatchFunction (backend) {
   function insert (parent, elm, ref$$1) {
     if (isDef(parent)) {
       if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
           nodeOps.insertBefore(parent, elm, ref$$1);
         }
       } else {
@@ -5583,7 +6105,7 @@ function createPatchFunction (backend) {
         checkDuplicateKeys(children);
       }
       for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
       }
     } else if (isPrimitive(vnode.text)) {
       nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
@@ -5614,12 +6136,12 @@ function createPatchFunction (backend) {
   function setScope (vnode) {
     var i;
     if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     } else {
       var ancestor = vnode;
       while (ancestor) {
         if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
+          nodeOps.setStyleScope(vnode.elm, i);
         }
         ancestor = ancestor.parent;
       }
@@ -5630,13 +6152,13 @@ function createPatchFunction (backend) {
       i !== vnode.fnContext &&
       isDef(i = i.$options._scopeId)
     ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     }
   }
 
   function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
     for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
     }
   }
 
@@ -5654,7 +6176,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+  function removeVnodes (vnodes, startIdx, endIdx) {
     for (; startIdx <= endIdx; ++startIdx) {
       var ch = vnodes[startIdx];
       if (isDef(ch)) {
@@ -5723,20 +6245,20 @@ function createPatchFunction (backend) {
       } else if (isUndef(oldEndVnode)) {
         oldEndVnode = oldCh[--oldEndIdx];
       } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         oldStartVnode = oldCh[++oldStartIdx];
         newStartVnode = newCh[++newStartIdx];
       } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         oldEndVnode = oldCh[--oldEndIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
         oldStartVnode = oldCh[++oldStartIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
         oldEndVnode = oldCh[--oldEndIdx];
         newStartVnode = newCh[++newStartIdx];
@@ -5746,16 +6268,16 @@ function createPatchFunction (backend) {
           ? oldKeyToIdx[newStartVnode.key]
           : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
         if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
         } else {
           vnodeToMove = oldCh[idxInOld];
           if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
           } else {
             // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
           }
         }
         newStartVnode = newCh[++newStartIdx];
@@ -5765,7 +6287,7 @@ function createPatchFunction (backend) {
       refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
       addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
     } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
     }
   }
 
@@ -5794,11 +6316,23 @@ function createPatchFunction (backend) {
     }
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
     if (oldVnode === vnode) {
       return
     }
 
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     var elm = vnode.elm = oldVnode.elm;
 
     if (isTrue(oldVnode.isAsyncPlaceholder)) {
@@ -5839,10 +6373,13 @@ function createPatchFunction (backend) {
       if (isDef(oldCh) && isDef(ch)) {
         if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
       } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch);
+        }
         if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
         addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
       } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
+        removeVnodes(oldCh, 0, oldCh.length - 1);
       } else if (isDef(oldVnode.text)) {
         nodeOps.setTextContent(elm, '');
       }
@@ -5980,7 +6517,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
     if (isUndef(vnode)) {
       if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
       return
@@ -5992,12 +6529,12 @@ function createPatchFunction (backend) {
     if (isUndef(oldVnode)) {
       // empty mount (likely as component), create new root element
       isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
+      createElm(vnode, insertedVnodeQueue);
     } else {
       var isRealElement = isDef(oldVnode.nodeType);
       if (!isRealElement && sameVnode(oldVnode, vnode)) {
         // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
       } else {
         if (isRealElement) {
           // mounting to a real element
@@ -6028,7 +6565,7 @@ function createPatchFunction (backend) {
 
         // replacing existing element
         var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
+        var parentElm = nodeOps.parentNode(oldElm);
 
         // create new node
         createElm(
@@ -6037,7 +6574,7 @@ function createPatchFunction (backend) {
           // extremely rare edge case: do not insert if old element is in a
           // leaving transition. Only happens when combining transition +
           // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
+          oldElm._leaveCb ? null : parentElm,
           nodeOps.nextSibling(oldElm)
         );
 
@@ -6072,8 +6609,8 @@ function createPatchFunction (backend) {
         }
 
         // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
         } else if (isDef(oldVnode.tag)) {
           invokeDestroyHook(oldVnode);
         }
@@ -6123,6 +6660,7 @@ function _update (oldVnode, vnode) {
     } else {
       // existing directive, update
       dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
       callHook$1(dir, 'update', vnode, oldVnode);
       if (dir.def && dir.def.componentUpdated) {
         dirsWithPostpatch.push(dir);
@@ -6229,7 +6767,7 @@ function updateAttrs (oldVnode, vnode) {
     cur = attrs[key];
     old = oldAttrs[key];
     if (old !== cur) {
-      setAttr(elm, key, cur);
+      setAttr(elm, key, cur, vnode.data.pre);
     }
   }
   // #4391: in IE9, setting type can reset value for input[type=radio]
@@ -6249,8 +6787,10 @@ function updateAttrs (oldVnode, vnode) {
   }
 }
 
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
+function setAttr (el, key, value, isInPre) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
     // set attribute for blank value
     // e.g. <option disabled>Select one</option>
     if (isFalsyAttrValue(value)) {
@@ -6264,7 +6804,7 @@ function setAttr (el, key, value) {
       el.setAttribute(key, value);
     }
   } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
+    el.setAttribute(key, convertEnumeratedValue(key, value));
   } else if (isXlink(key)) {
     if (isFalsyAttrValue(value)) {
       el.removeAttributeNS(xlinkNS, getXlinkProp(key));
@@ -6272,28 +6812,32 @@ function setAttr (el, key, value) {
       el.setAttributeNS(xlinkNS, key, value);
     }
   } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        var blocker = function (e) {
-          e.stopImmediatePropagation();
-          el.removeEventListener('input', blocker);
-        };
-        el.addEventListener('input', blocker);
-        // $flow-disable-line
-        el.__ieph = true; /* IE placeholder patched */
-      }
-      el.setAttribute(key, value);
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
     }
+    el.setAttribute(key, value);
   }
 }
 
@@ -6434,15 +6978,19 @@ function wrapFilter (exp, filter) {
   } else {
     var name = filter.slice(0, i);
     var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
   }
 }
 
 /*  */
 
-function baseWarn (msg) {
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
   console.error(("[Vue compiler]: " + msg));
 }
+/* eslint-enable no-unused-vars */
 
 function pluckModuleFunction (
   modules,
@@ -6453,20 +7001,23 @@ function pluckModuleFunction (
     : []
 }
 
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
 // add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
+function addRawAttr (el, name, value, range) {
   el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
 }
 
 function addDirective (
@@ -6475,19 +7026,36 @@ function addDirective (
   rawName,
   value,
   arg,
-  modifiers
+  isDynamicArg,
+  modifiers,
+  range
 ) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
   el.plain = false;
 }
 
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
 function addHandler (
   el,
   name,
   value,
   modifiers,
   important,
-  warn
+  warn,
+  range,
+  dynamic
 ) {
   modifiers = modifiers || emptyObject;
   // warn prevent and passive modifier
@@ -6498,35 +7066,42 @@ function addHandler (
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     );
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic);
   }
   if (modifiers.once) {
     delete modifiers.once;
-    name = '~' + name; // mark the event as once
+    name = prependModifierMarker('~', name, dynamic);
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
+    name = prependModifierMarker('&', name, dynamic);
   }
 
   var events;
@@ -6537,7 +7112,7 @@ function addHandler (
     events = el.events || (el.events = {});
   }
 
-  var newHandler = { value: value };
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers;
   }
@@ -6555,6 +7130,15 @@ function addHandler (
   el.plain = false;
 }
 
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
 function getBindingAttr (
   el,
   name,
@@ -6598,6 +7182,35 @@ function getAndRemoveAttr (
   return val
 }
 
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
 /*  */
 
 /**
@@ -6617,8 +7230,8 @@ function genComponentModel (
   if (trim) {
     valueExpression =
       "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
   }
   if (number) {
     valueExpression = "_n(" + valueExpression + ")";
@@ -6627,7 +7240,7 @@ function genComponentModel (
 
   el.model = {
     value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
+    expression: JSON.stringify(value),
     callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
   };
 }
@@ -6662,16 +7275,14 @@ function genAssignmentCode (
  *
  */
 
-var len;
-var str;
-var chr;
-var index$1;
-var expressionPos;
-var expressionEndPos;
+var len, str, chr, index$1, expressionPos, expressionEndPos;
 
 
 
 function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
   len = val.length;
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
@@ -6774,7 +7385,8 @@ function model (
     if (tag === 'input' && type === 'file') {
       warn$1(
         "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
       );
     }
   }
@@ -6800,7 +7412,8 @@ function model (
       "<" + (el.tag) + " v-model=\"" + value + "\">: " +
       "v-model is not supported on this element type. " +
       'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
     );
   }
 
@@ -6832,8 +7445,8 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
           '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
     "}else{" + (genAssignmentCode(value, '$$c')) + "}",
     null, true
   );
@@ -6876,13 +7489,16 @@ function genDefaultModel (
   var type = el.attrsMap.type;
 
   // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
   if (process.env.NODE_ENV !== 'production') {
     var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
       var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
       warn$1(
         binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
       );
     }
   }
@@ -6943,7 +7559,7 @@ function normalizeEvents (on) {
 
 var target$1;
 
-function createOnceHandler (handler, event, capture) {
+function createOnceHandler$1 (event, handler, capture) {
   var _target = target$1; // save current target element in closure
   return function onceHandler () {
     var res = handler.apply(null, arguments);
@@ -6953,17 +7569,49 @@ function createOnceHandler (handler, event, capture) {
   }
 }
 
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
 function add$1 (
-  event,
+  name,
   handler,
-  once$$1,
   capture,
   passive
 ) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
   target$1.addEventListener(
-    event,
+    name,
     handler,
     supportsPassive
       ? { capture: capture, passive: passive }
@@ -6972,14 +7620,14 @@ function add$1 (
 }
 
 function remove$2 (
-  event,
+  name,
   handler,
   capture,
   _target
 ) {
   (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
+    name,
+    handler._wrapper || handler,
     capture
   );
 }
@@ -6992,7 +7640,7 @@ function updateDOMListeners (oldVnode, vnode) {
   var oldOn = oldVnode.data.on || {};
   target$1 = vnode.elm;
   normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
   target$1 = undefined;
 }
 
@@ -7003,6 +7651,8 @@ var events = {
 
 /*  */
 
+var svgContainer;
+
 function updateDOMProps (oldVnode, vnode) {
   if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
     return
@@ -7017,10 +7667,11 @@ function updateDOMProps (oldVnode, vnode) {
   }
 
   for (key in oldProps) {
-    if (isUndef(props[key])) {
+    if (!(key in props)) {
       elm[key] = '';
     }
   }
+
   for (key in props) {
     cur = props[key];
     // ignore children if the node has textContent or innerHTML,
@@ -7036,7 +7687,7 @@ function updateDOMProps (oldVnode, vnode) {
       }
     }
 
-    if (key === 'value') {
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
       // store value as _value as well since
       // non-string values will be stringified
       elm._value = cur;
@@ -7045,8 +7696,29 @@ function updateDOMProps (oldVnode, vnode) {
       if (shouldUpdateValue(elm, strCur)) {
         elm.value = strCur;
       }
-    } else {
-      elm[key] = cur;
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
     }
   }
 }
@@ -7076,10 +7748,6 @@ function isDirtyWithModifiers (elm, newVal) {
   var value = elm.value;
   var modifiers = elm._vModifiers; // injected by v-model runtime
   if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
     if (modifiers.number) {
       return toNumber(value) !== toNumber(newVal)
     }
@@ -7174,7 +7842,7 @@ var setProp = function (el, name, val) {
   if (cssVarRE.test(name)) {
     el.style.setProperty(name, val);
   } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
   } else {
     var normalizedName = normalize(name);
     if (Array.isArray(val)) {
@@ -7258,6 +7926,8 @@ var style = {
 
 /*  */
 
+var whitespaceRE = /\s+/;
+
 /**
  * Add class with compatibility for SVG since classList is not supported on
  * SVG elements in IE
@@ -7271,7 +7941,7 @@ function addClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
     } else {
       el.classList.add(cls);
     }
@@ -7296,7 +7966,7 @@ function removeClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
     } else {
       el.classList.remove(cls);
     }
@@ -7320,20 +7990,20 @@ function removeClass (el, cls) {
 
 /*  */
 
-function resolveTransition (def) {
-  if (!def) {
+function resolveTransition (def$$1) {
+  if (!def$$1) {
     return
   }
   /* istanbul ignore else */
-  if (typeof def === 'object') {
+  if (typeof def$$1 === 'object') {
     var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
     }
-    extend(res, def);
+    extend(res, def$$1);
     return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
   }
 }
 
@@ -7436,11 +8106,12 @@ var transformRE = /\b(transform|all)(,|$)/;
 
 function getTransitionInfo (el, expectedType) {
   var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
   var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
   var animationTimeout = getTimeout(animationDelays, animationDurations);
 
   var type;
@@ -7494,8 +8165,12 @@ function getTimeout (delays, durations) {
   }))
 }
 
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
 function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
 }
 
 /*  */
@@ -7544,8 +8219,8 @@ function enter (vnode, toggleDisplay) {
   var context = activeInstance;
   var transitionNode = activeInstance.$vnode;
   while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
     context = transitionNode.context;
+    transitionNode = transitionNode.parent;
   }
 
   var isAppear = !context._isMounted || !vnode.isRootInsert;
@@ -7627,13 +8302,15 @@ function enter (vnode, toggleDisplay) {
     addTransitionClass(el, startClass);
     addTransitionClass(el, activeClass);
     nextFrame(function () {
-      addTransitionClass(el, toClass);
       removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
         }
       }
     });
@@ -7725,7 +8402,7 @@ function leave (vnode, rm) {
       return
     }
     // record leaving element
-    if (!vnode.data.show) {
+    if (!vnode.data.show && el.parentNode) {
       (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
     }
     beforeLeave && beforeLeave(el);
@@ -7733,13 +8410,15 @@ function leave (vnode, rm) {
       addTransitionClass(el, leaveClass);
       addTransitionClass(el, leaveActiveClass);
       nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
         removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
           }
         }
       });
@@ -7862,15 +8541,13 @@ var directive = {
     } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
       el._vModifiers = binding.modifiers;
       if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
         // Safari < 10.2 & UIWebView doesn't fire compositionend when
         // switching focus before confirming composition choice
         // this also fixes the issue where some browsers e.g. iOS Chrome
         // fires "change" instead of "input" on autocomplete.
         el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
         /* istanbul ignore if */
         if (isIE9) {
           el.vmodel = true;
@@ -8004,7 +8681,7 @@ var show = {
     var oldValue = ref.oldValue;
 
     /* istanbul ignore if */
-    if (value === oldValue) { return }
+    if (!value === !oldValue) { return }
     vnode = locateNode(vnode);
     var transition$$1 = vnode.data && vnode.data.transition;
     if (transition$$1) {
@@ -8043,9 +8720,6 @@ var platformDirectives = {
 
 /*  */
 
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
 var transitionProps = {
   name: String,
   appear: Boolean,
@@ -8111,6 +8785,10 @@ function isSameChild (child, oldChild) {
   return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
 var Transition = {
   name: 'transition',
   props: transitionProps,
@@ -8125,7 +8803,7 @@ var Transition = {
     }
 
     // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
+    children = children.filter(isNotTextNode);
     /* istanbul ignore if */
     if (!children.length) {
       return
@@ -8190,7 +8868,7 @@ var Transition = {
 
     // mark v-show
     // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
       child.data.show = true;
     }
 
@@ -8232,17 +8910,6 @@ var Transition = {
 
 /*  */
 
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
-
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
-
 var props = extend({
   tag: String,
   moveClass: String
@@ -8253,6 +8920,25 @@ delete props.mode;
 var TransitionGroup = {
   props: props,
 
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
   render: function render (h) {
     var tag = this.tag || this.$vnode.data.tag || 'span';
     var map = Object.create(null);
@@ -8296,17 +8982,6 @@ var TransitionGroup = {
     return h(tag, null, children)
   },
 
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
-
   updated: function updated () {
     var children = this.prevChildren;
     var moveClass = this.moveClass || ((this.name || 'v') + '-move');
@@ -8332,6 +9007,9 @@ var TransitionGroup = {
         addTransitionClass(el, moveClass);
         s.transform = s.WebkitTransform = s.transitionDuration = '';
         el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
           if (!e || /transform$/.test(e.propertyName)) {
             el.removeEventListener(transitionEndEvent, cb);
             el._moveCb = null;
@@ -8407,21 +9085,21 @@ var platformComponents = {
 /*  */
 
 // install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
 
 // install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
 
 // install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
 
 // public mount method
-Vue$3.prototype.$mount = function (
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -8431,32 +9109,38 @@ Vue$3.prototype.$mount = function (
 
 // devtools global hook
 /* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if (process.env.NODE_ENV !== 'production' && isChrome) {
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else if (
+        process.env.NODE_ENV !== 'production' &&
+        process.env.NODE_ENV !== 'test'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (process.env.NODE_ENV !== 'production' &&
+      process.env.NODE_ENV !== 'test' &&
+      config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
       console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
       );
     }
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
-  }
-}, 0);
+  }, 0);
+}
 
 /*  */
 
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
 var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
 var buildRegex = cached(function (delimiters) {
@@ -8514,7 +9198,8 @@ function transformNode (el, options) {
         "class=\"" + staticClass + "\": " +
         'Interpolation inside attributes has been removed. ' +
         'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
       );
     }
   }
@@ -8558,7 +9243,8 @@ function transformNode$1 (el, options) {
           "style=\"" + staticStyle + "\": " +
           'Interpolation inside attributes has been removed. ' +
           'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
         );
       }
     }
@@ -8627,31 +9313,19 @@ var isNonPhrasingTag = makeMap(
  * Not type-checking this file because it's mostly vendor code.
  */
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
 // Regular Expressions for parsing tags and attributes
 var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
 var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
 var startTagOpen = new RegExp(("^<" + qnameCapture));
 var startTagClose = /^\s*(\/?)>/;
 var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
 var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
 var conditionalComment = /^<!\[/;
 
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
 // Special Elements (can contain anything)
 var isPlainTextElement = makeMap('script,style,textarea', true);
 var reCache = {};
@@ -8662,10 +9336,11 @@ var decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 };
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
 
 // #5992
 var isIgnoreNewlineTag = makeMap('pre,textarea', true);
@@ -8695,7 +9370,7 @@ function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
             }
             advance(commentEnd + 3);
             continue
@@ -8732,7 +9407,7 @@ function parseHTML (html, options) {
         var startTagMatch = parseStartTag();
         if (startTagMatch) {
           handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1);
           }
           continue
@@ -8755,16 +9430,18 @@ function parseHTML (html, options) {
           rest = html.slice(textEnd);
         }
         text = html.substring(0, textEnd);
-        advance(textEnd);
       }
 
       if (textEnd < 0) {
         text = html;
-        html = '';
+      }
+
+      if (text) {
+        advance(text.length);
       }
 
       if (options.chars && text) {
-        options.chars(text);
+        options.chars(text, index - text.length, index);
       }
     } else {
       var endTagLength = 0;
@@ -8774,7 +9451,7 @@ function parseHTML (html, options) {
         endTagLength = endTag.length;
         if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
           text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
             .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
         }
         if (shouldIgnoreFirstNewline(stackedTag, text)) {
@@ -8793,7 +9470,7 @@ function parseHTML (html, options) {
     if (html === last) {
       options.chars && options.chars(html);
       if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
       }
       break
     }
@@ -8817,8 +9494,10 @@ function parseHTML (html, options) {
       };
       advance(start[0].length);
       var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
         advance(attr[0].length);
+        attr.end = index;
         match.attrs.push(attr);
       }
       if (end) {
@@ -8849,12 +9528,6 @@ function parseHTML (html, options) {
     var attrs = new Array(l);
     for (var i = 0; i < l; i++) {
       var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
       var value = args[3] || args[4] || args[5] || '';
       var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -8863,10 +9536,14 @@ function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       };
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
       lastTag = tagName;
     }
 
@@ -8880,12 +9557,9 @@ function parseHTML (html, options) {
     if (start == null) { start = index; }
     if (end == null) { end = index; }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -8904,7 +9578,8 @@ function parseHTML (html, options) {
           options.warn
         ) {
           options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
           );
         }
         if (options.end) {
@@ -8933,17 +9608,27 @@ function parseHTML (html, options) {
 /*  */
 
 var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
 var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
 var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
 
 var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE$1 = /[ \f\t\r\n]+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
 
 var decodeHTMLCached = cached(he.decode);
 
+var emptySlotScopeToken = "_empty_";
+
 // configurable state
 var warn$2;
 var delimiters;
@@ -8953,8 +9638,7 @@ var postTransforms;
 var platformIsPreTag;
 var platformMustUseProp;
 var platformGetTagNamespace;
-
-
+var maybeComponent;
 
 function createASTElement (
   tag,
@@ -8966,6 +9650,7 @@ function createASTElement (
     tag: tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent: parent,
     children: []
   }
@@ -8983,7 +9668,13 @@ function parse (
   platformIsPreTag = options.isPreTag || no;
   platformMustUseProp = options.mustUseProp || no;
   platformGetTagNamespace = options.getTagNamespace || no;
-
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  ); };
   transforms = pluckModuleFunction(options.modules, 'transformNode');
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
@@ -8992,20 +9683,67 @@ function parse (
 
   var stack = [];
   var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
   var root;
   var currentParent;
   var inVPre = false;
   var inPre = false;
   var warned = false;
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true;
-      warn$2(msg);
+      warn$2(msg, range);
     }
   }
 
   function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else if (process.env.NODE_ENV !== 'production') {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
     // check pre state
     if (element.pre) {
       inVPre = false;
@@ -9019,6 +9757,37 @@ function parse (
     }
   }
 
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
   parseHTML(template, {
     warn: warn$2,
     expectHTML: options.expectHTML,
@@ -9027,7 +9796,8 @@ function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
       // check namespace.
       // inherit parent ns if there is one
       var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
@@ -9043,12 +9813,36 @@ function parse (
         element.ns = ns;
       }
 
+      if (process.env.NODE_ENV !== 'production') {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$2(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true;
         process.env.NODE_ENV !== 'production' && warn$2(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
         );
       }
 
@@ -9073,58 +9867,15 @@ function parse (
         processFor(element);
         processIf(element);
         processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
-
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
       }
 
-      // tree management
       if (!root) {
         root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(root);
         }
       }
+
       if (!unary) {
         currentParent = element;
         stack.push(element);
@@ -9133,29 +9884,29 @@ function parse (
       }
     },
 
-    end: function end () {
-      // remove trailing whitespace
+    end: function end (tag, start, end$1) {
       var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
       // pop stack
       stack.length -= 1;
       currentParent = stack[stack.length - 1];
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        element.end = end$1;
+      }
       closeElement(element);
     },
 
-    chars: function chars (text) {
+    chars: function chars (text, start, end) {
       if (!currentParent) {
         if (process.env.NODE_ENV !== 'production') {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start: start }
             );
           } else if ((text = text.trim())) {
             warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
             );
           }
         }
@@ -9170,33 +9921,66 @@ function parse (
         return
       }
       var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
       if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE$1, ' ');
+        }
         var res;
+        var child;
         if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
+          child = {
             type: 2,
             expression: res.expression,
             tokens: res.tokens,
             text: text
-          });
+          };
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text: text
-          });
+          };
+        }
+        if (child) {
+          if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
         }
       }
     },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
     }
   });
   return root
@@ -9209,14 +9993,19 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
       };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
     }
   } else if (!el.pre) {
     // non root node in pre blocks with no attributes
@@ -9224,27 +10013,53 @@ function processRawAttrs (el) {
   }
 }
 
-function processElement (element, options) {
+function processElement (
+  element,
+  options
+) {
   processKey(element);
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
 
   processRef(element);
-  processSlot(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
   processComponent(element);
   for (var i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element;
   }
   processAttrs(element);
+  return element
 }
 
 function processKey (el) {
   var exp = getBindingAttr(el, 'key');
   if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn$2("<template> cannot be keyed. Place the key on real elements instead.");
+    if (process.env.NODE_ENV !== 'production') {
+      if (el.tag === 'template') {
+        warn$2(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$2(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
     }
     el.key = exp;
   }
@@ -9266,12 +10081,15 @@ function processFor (el) {
       extend(el, res);
     } else if (process.env.NODE_ENV !== 'production') {
       warn$2(
-        ("Invalid v-for expression: " + exp)
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
       );
     }
   }
 }
 
+
+
 function parseFor (exp) {
   var inMatch = exp.match(forAliasRE);
   if (!inMatch) { return }
@@ -9280,7 +10098,7 @@ function parseFor (exp) {
   var alias = inMatch[1].trim().replace(stripParensRE, '');
   var iteratorMatch = alias.match(forIteratorRE);
   if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
+    res.alias = alias.replace(forIteratorRE, '').trim();
     res.iterator1 = iteratorMatch[1].trim();
     if (iteratorMatch[2]) {
       res.iterator2 = iteratorMatch[2].trim();
@@ -9320,7 +10138,8 @@ function processIfConditions (el, parent) {
   } else if (process.env.NODE_ENV !== 'production') {
     warn$2(
       "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     );
   }
 }
@@ -9334,7 +10153,8 @@ function findPrevElement (children) {
       if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
         warn$2(
           "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
+          "will be ignored.",
+          children[i]
         );
       }
       children.pop();
@@ -9356,51 +10176,157 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if (process.env.NODE_ENV !== 'production' && el.key) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && slotScope) {
       warn$2(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
       );
     }
-  } else {
-    var slotScope;
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+      warn$2(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
     if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn$2(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (el.slotTarget || el.slotScope) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$2(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn$2(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (!maybeComponent(el)) {
+            warn$2(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$2(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$2(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
       }
-      el.slotScope = slotScope;
     }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn$2(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (process.env.NODE_ENV !== 'production' && el.key) {
+      warn$2(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
+      );
     }
   }
 }
@@ -9417,7 +10343,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name;
     value = list[i].value;
@@ -9425,50 +10351,100 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true;
       // modifiers
-      modifiers = parseModifiers(name);
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
       if (modifiers) {
         name = name.replace(modifierRE, '');
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
-        isProp = false;
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          process.env.NODE_ENV !== 'production' &&
+          value.trim().length === 0
+        ) {
+          warn$2(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name);
             if (name === 'innerHtml') { name = 'innerHTML'; }
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name);
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$2,
+                list[i],
+                true // dynamic
+              );
+            }
           }
         }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value);
+          addProp(el, name, value, list[i], isDynamic);
         } else {
-          addAttr(el, name, value);
+          addAttr(el, name, value, list[i], isDynamic);
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$2);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
       } else { // normal directives
         name = name.replace(dirRE, '');
         // parse arg
         var argMatch = name.match(argRE);
         var arg = argMatch && argMatch[1];
+        isDynamic = false;
         if (arg) {
           name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers);
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
         if (process.env.NODE_ENV !== 'production' && name === 'model') {
           checkForAliasModel(el, value);
         }
@@ -9482,17 +10458,18 @@ function processAttrs (el) {
             name + "=\"" + value + "\": " +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
+      addAttr(el, name, JSON.stringify(value), list[i]);
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+        addProp(el, name, 'true', list[i]);
       }
     }
   }
@@ -9525,7 +10502,7 @@ function makeAttrsMap (attrs) {
       process.env.NODE_ENV !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn$2('duplicate attribute: ' + attrs[i].name);
+      warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
     }
     map[attrs[i].name] = attrs[i].value;
   }
@@ -9572,7 +10549,8 @@ function checkForAliasModel (el, value) {
         "You are binding v-model directly to a v-for iteration alias. " +
         "This will not be able to modify the v-for source array because " +
         "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
       );
     }
     _el = _el.parent;
@@ -9581,21 +10559,22 @@ function checkForAliasModel (el, value) {
 
 /*  */
 
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
 function preTransformNode (el, options) {
   if (el.tag === 'input') {
     var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
       var ifCondition = getAndRemoveAttr(el, 'v-if', true);
       var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
       var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
@@ -9646,21 +10625,21 @@ function cloneASTElement (el) {
   return createASTElement(el.tag, el.attrsList.slice(), el.parent)
 }
 
-var model$2 = {
+var model$1 = {
   preTransformNode: preTransformNode
 };
 
 var modules$1 = [
   klass$1,
   style$1,
-  model$2
+  model$1
 ];
 
 /*  */
 
 function text (el, dir) {
   if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -9668,7 +10647,7 @@ function text (el, dir) {
 
 function html (el, dir) {
   if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -9723,7 +10702,7 @@ function optimize (root, options) {
 
 function genStaticKeys$1 (keys) {
   return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
     (keys ? ',' + keys : '')
   )
 }
@@ -9822,10 +10801,11 @@ function isDirectChildOfTemplateFor (node) {
 
 /*  */
 
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 var keyCodes = {
   esc: 27,
   tab: 9,
@@ -9838,6 +10818,23 @@ var keyCodes = {
   'delete': [8, 46]
 };
 
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -9858,37 +10855,45 @@ var modifierCode = {
 
 function genHandlers (
   events,
-  isNative,
-  warn
+  isNative
 ) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
   for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
-function genHandler (
-  name,
-  handler
-) {
+function genHandler (handler) {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
   }
 
   var isMethodPath = simplePathRE.test(handler.value);
   var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
 
   if (!handler.modifiers) {
     if (isMethodPath || isFunctionExpression) {
       return handler.value
     }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
   } else {
     var code = '';
     var genModifierCode = '';
@@ -9920,17 +10925,24 @@ function genHandler (
       code += genModifierCode;
     }
     var handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? ("return " + (handler.value) + ".apply(null, arguments)")
       : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
+        ? ("return (" + (handler.value) + ").apply(null, arguments)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
     return ("function($event){" + code + handlerCode + "}")
   }
 }
 
 function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
 }
 
 function genFilterCode (key) {
@@ -9938,12 +10950,15 @@ function genFilterCode (key) {
   if (keyVal) {
     return ("$event.keyCode!==" + keyVal)
   }
-  var code = keyCodes[key];
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
   return (
     "_k($event.keyCode," +
     (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
   )
 }
 
@@ -9974,6 +10989,10 @@ var baseDirectives = {
 
 /*  */
 
+
+
+
+
 var CodegenState = function CodegenState (options) {
   this.options = options;
   this.warn = options.warn || baseWarn;
@@ -9981,9 +11000,10 @@ var CodegenState = function CodegenState (options) {
   this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
   this.directives = extend(extend({}, baseDirectives), options.directives);
   var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
   this.onceId = 0;
   this.staticRenderFns = [];
+  this.pre = false;
 };
 
 
@@ -9993,7 +11013,8 @@ function generate (
   options
 ) {
   var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
+  // fix #11483, Root level <script> tags should not be rendered.
+  var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
   return {
     render: ("with(this){return " + code + "}"),
     staticRenderFns: state.staticRenderFns
@@ -10001,6 +11022,10 @@ function generate (
 }
 
 function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -10009,7 +11034,7 @@ function genElement (el, state) {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -10019,7 +11044,10 @@ function genElement (el, state) {
     if (el.component) {
       code = genComponent(el.component, el, state);
     } else {
-      var data = el.plain ? undefined : genData$2(el, state);
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
 
       var children = el.inlineTemplate ? null : genChildren(el, state, true);
       code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
@@ -10035,7 +11063,15 @@ function genElement (el, state) {
 // hoist static sub-trees out
 function genStatic (el, state) {
   el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
   state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
   return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
 }
 
@@ -10056,7 +11092,8 @@ function genOnce (el, state) {
     }
     if (!key) {
       process.env.NODE_ENV !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
       );
       return genElement(el, state)
     }
@@ -10124,6 +11161,7 @@ function genFor (
       "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
       "v-for should have explicit keys. " +
       "See https://vuejs.org/guide/list.html#key for more info.",
+      el.rawAttrsMap['v-for'],
       true /* tip */
     );
   }
@@ -10168,18 +11206,18 @@ function genData$2 (el, state) {
   }
   // attributes
   if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
+    data += "attrs:" + (genProps(el.attrs)) + ",";
   }
   // DOM props
   if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
+    data += "domProps:" + (genProps(el.props)) + ",";
   }
   // event handlers
   if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
+    data += (genHandlers(el.events, false)) + ",";
   }
   if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
+    data += (genHandlers(el.nativeEvents, true)) + ",";
   }
   // slot target
   // only for non-scoped slots
@@ -10188,7 +11226,7 @@ function genData$2 (el, state) {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
   }
   // component v-model
   if (el.model) {
@@ -10202,6 +11240,12 @@ function genData$2 (el, state) {
     }
   }
   data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data);
@@ -10230,7 +11274,7 @@ function genDirectives (el, state) {
     }
     if (needRuntime) {
       hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
     }
   }
   if (hasRuntime) {
@@ -10243,54 +11287,113 @@ function genInlineTemplate (el, state) {
   if (process.env.NODE_ENV !== 'production' && (
     el.children.length !== 1 || ast.type !== 1
   )) {
-    state.warn('Inline-template components must have exactly one child element.');
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
   }
-  if (ast.type === 1) {
+  if (ast && ast.type === 1) {
     var inlineRenderFns = generate(ast, state.options);
     return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
   }
 }
 
 function genScopedSlots (
+  el,
   slots,
   state
 ) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key,
   el,
   state
 ) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
     "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
 }
 
 function genChildren (
@@ -10309,13 +11412,16 @@ function genChildren (
       el$1.tag !== 'template' &&
       el$1.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el$1, state)
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
     }
-    var normalizationType = checkSkip
+    var normalizationType$1 = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
       : 0;
     var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
   }
 }
 
@@ -10353,7 +11459,7 @@ function needsNormalization (el) {
 function genNode (node, state) {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -10373,8 +11479,15 @@ function genComment (comment) {
 function genSlot (el, state) {
   var slotName = el.slotName || '"default"';
   var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
+  var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
   var bind$$1 = el.attrsMap['v-bind'];
   if ((attrs || bind$$1) && !children) {
     res += ",null";
@@ -10399,15 +11512,23 @@ function genComponent (
 }
 
 function genProps (props) {
-  var res = '';
+  var staticProps = "";
+  var dynamicProps = "";
   for (var i = 0; i < props.length; i++) {
     var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
     }
   }
-  return res.slice(0, -1)
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
 }
 
 // #3895, #4268
@@ -10419,6 +11540,8 @@ function transformSpecialNewlines (text) {
 
 /*  */
 
+
+
 // these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 var prohibitedKeywordRE = new RegExp('\\b' + (
@@ -10436,96 +11559,170 @@ var unaryOperatorsRE = new RegExp('\\b' + (
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
 // detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
+function detectErrors (ast, warn) {
   if (ast) {
-    checkNode(ast, errors);
+    checkNode(ast, warn);
   }
-  return errors
 }
 
-function checkNode (node, errors) {
+function checkNode (node, warn) {
   if (node.type === 1) {
     for (var name in node.attrsMap) {
       if (dirRE.test(name)) {
         var value = node.attrsMap[name];
         if (value) {
+          var range = node.rawAttrsMap[name];
           if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
           } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
           } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
           }
         }
       }
     }
     if (node.children) {
       for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+        checkNode(node.children[i], warn);
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
+    checkExpression(node.expression, node.text, warn, node);
   }
 }
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
       "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
     );
   }
-  checkExpression(exp, text, errors);
+  checkExpression(exp, text, warn, range);
 }
 
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
 }
 
 function checkIdentifier (
   ident,
   type,
   text,
-  errors
+  warn,
+  range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(("var " + ident + "=_"));
     } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
     }
   }
 }
 
-function checkExpression (exp, text, errors) {
+function checkExpression (exp, text, warn, range) {
   try {
     new Function(("return " + exp));
   } catch (e) {
     var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
     if (keywordMatch) {
-      errors.push(
+      warn(
         "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
       );
     } else {
-      errors.push(
+      warn(
         "invalid expression: " + (e.message) + " in\n\n" +
         "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
       );
     }
   }
 }
 
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
 /*  */
 
+
+
 function createFunction (code, errors) {
   try {
     return new Function(code)
@@ -10579,14 +11776,28 @@ function createCompileToFunctionFn (compile) {
     // check compilation errors/tips
     if (process.env.NODE_ENV !== 'production') {
       if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
       }
     }
 
@@ -10632,11 +11843,29 @@ function createCompilerCreator (baseCompile) {
       var finalOptions = Object.create(baseOptions);
       var errors = [];
       var tips = [];
-      finalOptions.warn = function (msg, tip) {
+
+      var warn = function (msg, range, tip) {
         (tip ? tips : errors).push(msg);
       };
 
       if (options) {
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -10657,9 +11886,11 @@ function createCompilerCreator (baseCompile) {
         }
       }
 
-      var compiled = baseCompile(template, finalOptions);
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
       if (process.env.NODE_ENV !== 'production') {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        detectErrors(compiled.ast, warn);
       }
       compiled.errors = errors;
       compiled.tips = tips;
@@ -10697,6 +11928,7 @@ var createCompiler = createCompilerCreator(function baseCompile (
 /*  */
 
 var ref$1 = createCompiler(baseOptions);
+var compile = ref$1.compile;
 var compileToFunctions = ref$1.compileToFunctions;
 
 /*  */
@@ -10721,8 +11953,8 @@ var idToTemplate = cached(function (id) {
   return el && el.innerHTML
 });
 
-var mount = Vue$3.prototype.$mount;
-Vue$3.prototype.$mount = function (
+var mount = Vue.prototype.$mount;
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -10770,6 +12002,7 @@ Vue$3.prototype.$mount = function (
       }
 
       var ref = compileToFunctions(template, {
+        outputSourceRange: process.env.NODE_ENV !== 'production',
         shouldDecodeNewlines: shouldDecodeNewlines,
         shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
         delimiters: options.delimiters,
@@ -10804,6 +12037,6 @@ function getOuterHTML (el) {
   }
 }
 
-Vue$3.compile = compileToFunctions;
+Vue.compile = compileToFunctions;
 
-export default Vue$3;
+export default Vue;
diff --git a/dist/vue.js b/dist/vue.js
index 9d84c53b4be..d800532ab69 100644
--- a/dist/vue.js
+++ b/dist/vue.js
@@ -1,10798 +1,12014 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-	typeof define === 'function' && define.amd ? define(factory) :
-	(global.Vue = factory());
-}(this, (function () { 'use strict';
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = global || self, global.Vue = factory());
+}(this, function () { 'use strict';
 
-/*  */
+  /*  */
 
-var emptyObject = Object.freeze({});
+  var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-function isUndef (v) {
-  return v === undefined || v === null
-}
-
-function isDef (v) {
-  return v !== undefined && v !== null
-}
-
-function isTrue (v) {
-  return v === true
-}
-
-function isFalse (v) {
-  return v === false
-}
-
-/**
- * Check if value is primitive
- */
-function isPrimitive (value) {
-  return (
-    typeof value === 'string' ||
-    typeof value === 'number' ||
-    // $flow-disable-line
-    typeof value === 'symbol' ||
-    typeof value === 'boolean'
-  )
-}
-
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
+  }
 
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
+  function isDef (v) {
+    return v !== undefined && v !== null
+  }
 
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
+  function isTrue (v) {
+    return v === true
+  }
 
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
+  function isFalse (v) {
+    return v === false
+  }
 
-function isRegExp (v) {
-  return _toString.call(v) === '[object RegExp]'
-}
+  /**
+   * Check if value is primitive.
+   */
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
+  }
 
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
+  /**
+   * Quick object check - this is primarily used to tell
+   * Objects from primitive values when we know the value
+   * is a JSON-compliant type.
+   */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
+  }
 
-/**
- * Convert a value to a string that is actually rendered.
- */
-function toString (val) {
-  return val == null
-    ? ''
-    : typeof val === 'object'
-      ? JSON.stringify(val, null, 2)
-      : String(val)
-}
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-function toNumber (val) {
-  var n = parseFloat(val);
-  return isNaN(n) ? val : n
-}
-
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
 
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
+  }
 
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
+  /**
+   * Strict object type check. Only returns true
+   * for plain JavaScript objects.
+   */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
   }
-}
 
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
+  function isRegExp (v) {
+    return _toString.call(v) === '[object RegExp]'
+  }
 
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
+  /**
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
 
-/**
- * Capitalize a string.
- */
-var capitalize = cached(function (str) {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
+  function isPromise (val) {
+    return (
+      isDef(val) &&
+      typeof val.then === 'function' &&
+      typeof val.catch === 'function'
+    )
+  }
 
-/**
- * Hyphenate a camelCase string.
- */
-var hyphenateRE = /\B([A-Z])/g;
-var hyphenate = cached(function (str) {
-  return str.replace(hyphenateRE, '-$1').toLowerCase()
-});
+  /**
+   * Convert a value to a string that is actually rendered.
+   */
+  function toString (val) {
+    return val == null
+      ? ''
+      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+        ? JSON.stringify(val, null, 2)
+        : String(val)
+  }
 
-/**
- * Simple bind, faster than native
- */
-function bind (fn, ctx) {
-  function boundFn (a) {
-    var l = arguments.length;
-    return l
-      ? l > 1
-        ? fn.apply(ctx, arguments)
-        : fn.call(ctx, a)
-      : fn.call(ctx)
-  }
-  // record original fn length
-  boundFn._length = fn.length;
-  return boundFn
-}
-
-/**
- * Convert an Array-like object to a real Array.
- */
-function toArray (list, start) {
-  start = start || 0;
-  var i = list.length - start;
-  var ret = new Array(i);
-  while (i--) {
-    ret[i] = list[i + start];
-  }
-  return ret
-}
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
+  /**
+   * Convert an input value to a number for persistence.
+   * If the conversion fails, return original string.
+   */
+  function toNumber (val) {
+    var n = parseFloat(val);
+    return isNaN(n) ? val : n
   }
-  return to
-}
 
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  var res = {};
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i]) {
-      extend(res, arr[i]);
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
     }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
   }
-  return res
-}
 
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
 
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
-/**
- * Generate a static keys string from compiler modules.
- */
-function genStaticKeys (modules) {
-  return modules.reduce(function (keys, m) {
-    return keys.concat(m.staticKeys || [])
-  }, []).join(',')
-}
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-function looseEqual (a, b) {
-  if (a === b) { return true }
-  var isObjectA = isObject(a);
-  var isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      var isArrayA = Array.isArray(a);
-      var isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every(function (e, i) {
-          return looseEqual(e, b[i])
-        })
-      } else if (!isArrayA && !isArrayB) {
-        var keysA = Object.keys(a);
-        var keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(function (key) {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
+  /**
+   * Remove an item from an array.
+   */
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
       }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
     }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
-  }
-}
-
-function looseIndexOf (arr, val) {
-  for (var i = 0; i < arr.length; i++) {
-    if (looseEqual(arr[i], val)) { return i }
   }
-  return -1
-}
 
-/**
- * Ensure a function is called only once.
- */
-function once (fn) {
-  var called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-var SSR_ATTR = 'data-server-rendered';
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
   /**
-   * Option merge strategies (used in core/util/options)
+   * Check whether an object has the property.
    */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
+  }
 
   /**
-   * Whether to suppress warnings.
+   * Create a cached version of a pure function.
    */
-  silent: false,
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
 
   /**
-   * Show production mode tip message on boot?
+   * Camelize a hyphen-delimited string.
    */
-  productionTip: "development" !== 'production',
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
 
   /**
-   * Whether to enable devtools
+   * Capitalize a string.
    */
-  devtools: "development" !== 'production',
+  var capitalize = cached(function (str) {
+    return str.charAt(0).toUpperCase() + str.slice(1)
+  });
 
   /**
-   * Whether to record perf
+   * Hyphenate a camelCase string.
    */
-  performance: false,
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
 
   /**
-   * Error handler for watcher errors
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
    */
-  errorHandler: null,
+
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
+
+    boundFn._length = fn.length;
+    return boundFn
+  }
+
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
+
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
 
   /**
-   * Warn handler for watcher warns
+   * Convert an Array-like object to a real Array.
    */
-  warnHandler: null,
+  function toArray (list, start) {
+    start = start || 0;
+    var i = list.length - start;
+    var ret = new Array(i);
+    while (i--) {
+      ret[i] = list[i + start];
+    }
+    return ret
+  }
 
   /**
-   * Ignore certain custom elements
+   * Mix properties into target object.
    */
-  ignoredElements: [],
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
 
   /**
-   * Custom user key aliases for v-on
+   * Merge an Array of Objects into a single Object.
    */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
+  function toObject (arr) {
+    var res = {};
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i]) {
+        extend(res, arr[i]);
+      }
+    }
+    return res
+  }
+
+  /* eslint-disable no-unused-vars */
 
   /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
    */
-  isReservedTag: no,
+  function noop (a, b, c) {}
 
   /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
+   * Always return false.
    */
-  isReservedAttr: no,
+  var no = function (a, b, c) { return false; };
+
+  /* eslint-enable no-unused-vars */
 
   /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
+   * Return the same value.
    */
-  isUnknownElement: no,
+  var identity = function (_) { return _; };
 
   /**
-   * Get the namespace of an element
+   * Generate a string containing static keys from compiler modules.
    */
-  getTagNamespace: noop,
+  function genStaticKeys (modules) {
+    return modules.reduce(function (keys, m) {
+      return keys.concat(m.staticKeys || [])
+    }, []).join(',')
+  }
 
   /**
-   * Parse the real tag name for the specific platform.
+   * Check if two values are loosely equal - that is,
+   * if they are plain objects, do they have the same shape?
    */
-  parsePlatformTagName: identity,
+  function looseEqual (a, b) {
+    if (a === b) { return true }
+    var isObjectA = isObject(a);
+    var isObjectB = isObject(b);
+    if (isObjectA && isObjectB) {
+      try {
+        var isArrayA = Array.isArray(a);
+        var isArrayB = Array.isArray(b);
+        if (isArrayA && isArrayB) {
+          return a.length === b.length && a.every(function (e, i) {
+            return looseEqual(e, b[i])
+          })
+        } else if (a instanceof Date && b instanceof Date) {
+          return a.getTime() === b.getTime()
+        } else if (!isArrayA && !isArrayB) {
+          var keysA = Object.keys(a);
+          var keysB = Object.keys(b);
+          return keysA.length === keysB.length && keysA.every(function (key) {
+            return looseEqual(a[key], b[key])
+          })
+        } else {
+          /* istanbul ignore next */
+          return false
+        }
+      } catch (e) {
+        /* istanbul ignore next */
+        return false
+      }
+    } else if (!isObjectA && !isObjectB) {
+      return String(a) === String(b)
+    } else {
+      return false
+    }
+  }
 
   /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
+   * Return the first index at which a loosely equal value can be
+   * found in the array (if value is a plain object, the array must
+   * contain an object of the same shape), or -1 if it is not present.
    */
-  mustUseProp: no,
+  function looseIndexOf (arr, val) {
+    for (var i = 0; i < arr.length; i++) {
+      if (looseEqual(arr[i], val)) { return i }
+    }
+    return -1
+  }
 
   /**
-   * Exposed for legacy reasons
+   * Ensure a function is called only once.
    */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
-
-/*  */
-
-/**
- * Check if a string starts with $ or _
- */
-function isReserved (str) {
-  var c = (str + '').charCodeAt(0);
-  return c === 0x24 || c === 0x5F
-}
-
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
-/**
- * Parse simple path.
- */
-var bailRE = /[^\w.$]/;
-function parsePath (path) {
-  if (bailRE.test(path)) {
-    return
-  }
-  var segments = path.split('.');
-  return function (obj) {
-    for (var i = 0; i < segments.length; i++) {
-      if (!obj) { return }
-      obj = obj[segments[i]];
-    }
-    return obj
-  }
-}
-
-/*  */
-
-
-// can we use __proto__?
-var hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
-
-var supportsPassive = false;
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        supportsPassive = true;
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
+  function once (fn) {
+    var called = false;
+    return function () {
+      if (!called) {
+        called = true;
+        fn.apply(this, arguments);
+      }
     }
   }
-  return _isServer
-};
 
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+  var SSR_ATTR = 'data-server-rendered';
 
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
 
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
 
-var _Set;
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  _Set = Set;
-} else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
-    function Set () {
-      this.set = Object.create(null);
-    }
-    Set.prototype.has = function has (key) {
-      return this.set[key] === true
-    };
-    Set.prototype.add = function add (key) {
-      this.set[key] = true;
-    };
-    Set.prototype.clear = function clear () {
-      this.set = Object.create(null);
-    };
+  /*  */
 
-    return Set;
-  }());
-}
 
-/*  */
 
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
+  });
 
-{
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
+  /*  */
 
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
+  /**
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+   */
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
-    }
-  };
+  /**
+   * Check if a string starts with $ or _
+   */
+  function isReserved (str) {
+    var c = (str + '').charCodeAt(0);
+    return c === 0x24 || c === 0x5F
+  }
 
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
-    }
-  };
+  /**
+   * Define a property.
+   */
+  function def (obj, key, val, enumerable) {
+    Object.defineProperty(obj, key, {
+      value: val,
+      enumerable: !!enumerable,
+      writable: true,
+      configurable: true
+    });
+  }
 
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
+  /**
+   * Parse simple path.
+   */
+  var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+  function parsePath (path) {
+    if (bailRE.test(path)) {
+      return
     }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
+    var segments = path.split('.');
+    return function (obj) {
+      for (var i = 0; i < segments.length; i++) {
+        if (!obj) { return }
+        obj = obj[segments[i]];
+      }
+      return obj
     }
+  }
 
-    return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
-    )
-  };
+  /*  */
 
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
-    }
-    return res
-  };
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
 
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
+  // Browser environment sniffing
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+
+  var supportsPassive = false;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
+          /* istanbul ignore next */
+          supportsPassive = true;
         }
-        tree.push(vm);
-        vm = vm.$parent;
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
+  }
+
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
       }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
     }
+    return _isServer
   };
-}
 
-/*  */
+  // detect devtools
+  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
 
+  /* istanbul ignore next */
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+  }
 
-var uid = 0;
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
 
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-var targetStack = [];
-
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
-}
-
-function popTarget () {
-  Dep.target = targetStack.pop();
-}
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-var createEmptyVNode = function (text) {
-  if ( text === void 0 ) text = '';
-
-  var node = new VNode();
-  node.text = text;
-  node.isComment = true;
-  return node
-};
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
-  var cloned = new VNode(
-    vnode.tag,
-    vnode.data,
-    vnode.children,
-    vnode.text,
-    vnode.elm,
-    vnode.context,
-    componentOptions,
-    vnode.asyncFactory
-  );
-  cloned.ns = vnode.ns;
-  cloned.isStatic = vnode.isStatic;
-  cloned.key = vnode.key;
-  cloned.isComment = vnode.isComment;
-  cloned.fnContext = vnode.fnContext;
-  cloned.fnOptions = vnode.fnOptions;
-  cloned.fnScopeId = vnode.fnScopeId;
-  cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
-  return cloned
-}
-
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
+    // use native Set when available.
+    _Set = Set;
+  } else {
+    // a non-standard Set polyfill that only works with primitive keys.
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
+      }
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
+      };
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
+      };
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
+      };
 
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
+      return Set;
+    }());
+  }
 
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
-    }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
+  /*  */
 
-/*  */
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
 
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
 
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
 
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
+      if (config.warnHandler) {
+        config.warnHandler.call(null, msg, vm, trace);
+      } else if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
+      }
+    };
 
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
-  }
-};
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
+    };
 
-// helpers
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
+
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
+    };
 
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
+    };
 
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
           }
+          tree.push(vm);
+          vm = vm.$parent;
         }
-      }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
-      }
-      /* eslint-enable no-self-compare */
-      if ("development" !== 'production' && customSetter) {
-        customSetter();
-      }
-      if (setter) {
-        setter.call(obj, newVal);
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
       } else {
-        val = newVal;
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
       }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
-    }
-  });
-}
-
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
-  }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
-  }
-  if (!ob) {
-    target[key] = val;
-    return val
-  }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
-
-/**
- * Delete a property and trigger change if necessary.
- */
-function del (target, key) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.splice(key, 1);
-    return
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid deleting properties on a Vue instance or its root $data ' +
-      '- just set it to null.'
-    );
-    return
-  }
-  if (!hasOwn(target, key)) {
-    return
-  }
-  delete target[key];
-  if (!ob) {
-    return
+    };
   }
-  ob.dep.notify();
-}
 
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
-    }
-  }
-}
+  /*  */
 
-/*  */
+  var uid = 0;
 
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
+  /**
+   * A dep is an observable that can have multiple
+   * directives subscribing to it.
+   */
+  var Dep = function Dep () {
+    this.id = uid++;
+    this.subs = [];
+  };
 
-/**
- * Options with restrictions
- */
-{
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
-      warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
-      );
+  Dep.prototype.addSub = function addSub (sub) {
+    this.subs.push(sub);
+  };
+
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
+  };
+
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
     }
-    return defaultStrat(parent, child)
   };
-}
 
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    if (!config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort(function (a, b) { return a.id - b.id; });
     }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
-      } else {
-        return defaultData
-      }
+    for (var i = 0, l = subs.length; i < l; i++) {
+      subs[i].update();
     }
-  }
-}
+  };
 
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      "development" !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+  var targetStack = [];
 
-      return parentVal
-    }
-    return mergeDataOrFn(parentVal, childVal)
+  function pushTarget (target) {
+    targetStack.push(target);
+    Dep.target = target;
   }
 
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
-
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    "development" !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
+  function popTarget () {
+    targetStack.pop();
+    Dep.target = targetStack[targetStack.length - 1];
   }
-}
 
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
+  /*  */
 
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
-  {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && "development" !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (var key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-    warn(
-      'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
-    );
-  }
-  if (isBuiltInTag(name) || config.isReservedTag(name)) {
-    warn(
-      'Do not use built-in or reserved HTML elements as component ' +
-      'id: ' + name
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
+  };
+
+  var prototypeAccessors = { child: { configurable: true } };
+
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
+  };
+
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+  var createEmptyVNode = function (text) {
+    if ( text === void 0 ) text = '';
+
+    var node = new VNode();
+    node.text = text;
+    node.isComment = true;
+    return node
+  };
+
+  function createTextVNode (val) {
+    return new VNode(undefined, undefined, undefined, String(val))
+  }
+
+  // optimized shallow clone
+  // used for static nodes and slot nodes because they may be reused across
+  // multiple renders, cloning them avoids errors when DOM manipulations rely
+  // on their elm reference.
+  function cloneVNode (vnode) {
+    var cloned = new VNode(
+      vnode.tag,
+      vnode.data,
+      // #7975
+      // clone children array to avoid mutating original in case of cloning
+      // a child.
+      vnode.children && vnode.children.slice(),
+      vnode.text,
+      vnode.elm,
+      vnode.context,
+      vnode.componentOptions,
+      vnode.asyncFactory
     );
+    cloned.ns = vnode.ns;
+    cloned.isStatic = vnode.isStatic;
+    cloned.key = vnode.key;
+    cloned.isComment = vnode.isComment;
+    cloned.fnContext = vnode.fnContext;
+    cloned.fnOptions = vnode.fnOptions;
+    cloned.fnScopeId = vnode.fnScopeId;
+    cloned.asyncMeta = vnode.asyncMeta;
+    cloned.isCloned = true;
+    return cloned
+  }
+
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
+   */
+
+  var arrayProto = Array.prototype;
+  var arrayMethods = Object.create(arrayProto);
+
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
+
+  /**
+   * Intercept mutating methods and emit events
+   */
+  methodsToPatch.forEach(function (method) {
+    // cache original method
+    var original = arrayProto[method];
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
+      var result = original.apply(this, args);
+      var ob = this.__ob__;
+      var inserted;
+      switch (method) {
+        case 'push':
+        case 'unshift':
+          inserted = args;
+          break
+        case 'splice':
+          inserted = args.slice(2);
+          break
+      }
+      if (inserted) { ob.observeArray(inserted); }
+      // notify change
+      ob.dep.notify();
+      return result
+    });
+  });
+
+  /*  */
+
+  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+  /**
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
+   */
+  var shouldObserve = true;
+
+  function toggleObserving (value) {
+    shouldObserve = value;
   }
-}
 
-/**
- * Ensure all props option syntax are normalized into the
- * Object-based format.
- */
-function normalizeProps (options, vm) {
-  var props = options.props;
-  if (!props) { return }
-  var res = {};
-  var i, val, name;
-  if (Array.isArray(props)) {
-    i = props.length;
-    while (i--) {
-      val = props[i];
-      if (typeof val === 'string') {
-        name = camelize(val);
-        res[name] = { type: null };
+  /**
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
+   * object's property keys into getter/setters that
+   * collect dependencies and dispatch updates.
+   */
+  var Observer = function Observer (value) {
+    this.value = value;
+    this.dep = new Dep();
+    this.vmCount = 0;
+    def(value, '__ob__', this);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
       } else {
-        warn('props must be strings when using array syntax.');
+        copyAugment(value, arrayMethods, arrayKeys);
       }
+      this.observeArray(value);
+    } else {
+      this.walk(value);
     }
-  } else if (isPlainObject(props)) {
-    for (var key in props) {
-      val = props[key];
-      name = camelize(key);
-      res[name] = isPlainObject(val)
-        ? val
-        : { type: val };
+  };
+
+  /**
+   * Walk through all properties and convert them into
+   * getter/setters. This method should only be called when
+   * value type is Object.
+   */
+  Observer.prototype.walk = function walk (obj) {
+    var keys = Object.keys(obj);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
     }
-  } else {
-    warn(
-      "Invalid value for option \"props\": expected an Array or an Object, " +
-      "but got " + (toRawType(props)) + ".",
-      vm
-    );
-  }
-  options.props = res;
-}
+  };
 
-/**
- * Normalize all injections into Object-based format
- */
-function normalizeInject (options, vm) {
-  var inject = options.inject;
-  if (!inject) { return }
-  var normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (var i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (var key in inject) {
-      var val = inject[key];
-      normalized[key] = isPlainObject(val)
-        ? extend({ from: key }, val)
-        : { from: val };
+  /**
+   * Observe a list of Array items.
+   */
+  Observer.prototype.observeArray = function observeArray (items) {
+    for (var i = 0, l = items.length; i < l; i++) {
+      observe(items[i]);
     }
-  } else {
-    warn(
-      "Invalid value for option \"inject\": expected an Array or an Object, " +
-      "but got " + (toRawType(inject)) + ".",
-      vm
-    );
+  };
+
+  // helpers
+
+  /**
+   * Augment a target Object or Array by intercepting
+   * the prototype chain using __proto__
+   */
+  function protoAugment (target, src) {
+    /* eslint-disable no-proto */
+    target.__proto__ = src;
+    /* eslint-enable no-proto */
   }
-}
 
-/**
- * Normalize raw function directives into object format.
- */
-function normalizeDirectives (options) {
-  var dirs = options.directives;
-  if (dirs) {
-    for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
-      }
+  /**
+   * Augment a target Object or Array by defining
+   * hidden properties.
+   */
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
+    for (var i = 0, l = keys.length; i < l; i++) {
+      var key = keys[i];
+      def(target, key, src[key]);
     }
   }
-}
 
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
+  /**
+   * Attempt to create an observer instance for a value,
+   * returns the new observer if successfully observed,
+   * or the existing observer if the value already has one.
+   */
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
+    }
+    var ob;
+    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+      ob = value.__ob__;
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
+      ob = new Observer(value);
+    }
+    if (asRootData && ob) {
+      ob.vmCount++;
+    }
+    return ob
   }
-}
 
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-function mergeOptions (
-  parent,
-  child,
-  vm
-) {
-  {
-    checkComponents(child);
+  /**
+   * Define a reactive property on an Object.
+   */
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
+    var dep = new Dep();
+
+    var property = Object.getOwnPropertyDescriptor(obj, key);
+    if (property && property.configurable === false) {
+      return
+    }
+
+    // cater for pre-defined getter/setters
+    var getter = property && property.get;
+    var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
+    }
+
+    var childOb = !shallow && observe(val);
+    Object.defineProperty(obj, key, {
+      enumerable: true,
+      configurable: true,
+      get: function reactiveGetter () {
+        var value = getter ? getter.call(obj) : val;
+        if (Dep.target) {
+          dep.depend();
+          if (childOb) {
+            childOb.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
+            }
+          }
+        }
+        return value
+      },
+      set: function reactiveSetter (newVal) {
+        var value = getter ? getter.call(obj) : val;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
+        }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
+        if (setter) {
+          setter.call(obj, newVal);
+        } else {
+          val = newVal;
+        }
+        childOb = !shallow && observe(newVal);
+        dep.notify();
+      }
+    });
   }
 
-  if (typeof child === 'function') {
-    child = child.options;
+  /**
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
+   */
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
+    }
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
+      );
+      return val
+    }
+    if (!ob) {
+      target[key] = val;
+      return val
+    }
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
   }
 
-  normalizeProps(child, vm);
-  normalizeInject(child, vm);
-  normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
+  /**
+   * Delete a property and trigger change if necessary.
+   */
+  function del (target, key) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.splice(key, 1);
+      return
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid deleting properties on a Vue instance or its root $data ' +
+        '- just set it to null.'
+      );
+      return
+    }
+    if (!hasOwn(target, key)) {
+      return
+    }
+    delete target[key];
+    if (!ob) {
+      return
+    }
+    ob.dep.notify();
   }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  /**
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
+   */
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
+      }
     }
   }
-  var options = {};
-  var key;
-  for (key in parent) {
-    mergeField(key);
+
+  /*  */
+
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
+
+  /**
+   * Options with restrictions
+   */
+  {
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
+        warn(
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
+        );
+      }
+      return defaultStrat(parent, child)
+    };
   }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
+
+  /**
+   * Helper that recursively merges two data objects together.
+   */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
+
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
+
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
+      }
     }
+    return to
   }
-  function mergeField (key) {
-    var strat = strats[key] || defaultStrat;
-    options[key] = strat(parent[key], child[key], vm, key);
+
+  /**
+   * Data
+   */
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
+      }
+    } else {
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
+        } else {
+          return defaultData
+        }
+      }
+    }
   }
-  return options
-}
 
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-function resolveAsset (
-  options,
-  type,
-  id,
-  warnMissing
-) {
-  /* istanbul ignore if */
-  if (typeof id !== 'string') {
-    return
-  }
-  var assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) { return assets[id] }
-  var camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-  var PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-  // fallback to prototype chain
-  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if ("development" !== 'production' && warnMissing && !res) {
-    warn(
-      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-      options
-    );
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
+
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
+    }
+
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
+
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
+  ) {
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
   }
-  return res
-}
-
-/*  */
-
-function validateProp (
-  key,
-  propOptions,
-  propsData,
-  vm
-) {
-  var prop = propOptions[key];
-  var absent = !hasOwn(propsData, key);
-  var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
-    if (absent && !hasOwn(prop, 'default')) {
-      value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
-    }
-  }
-  // check default value
-  if (value === undefined) {
-    value = getPropDefaultValue(vm, prop, key);
-    // since the default value is a fresh copy,
-    // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
-    observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
+    }
+    return res
   }
-  {
-    assertProp(prop, key, value, vm, absent);
+
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
+
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
   }
-  return value
-}
 
-/**
- * Get the default value of a prop.
- */
-function getPropDefaultValue (vm, prop, key) {
-  // no default, return undefined
-  if (!hasOwn(prop, 'default')) {
-    return undefined
-  }
-  var def = prop.default;
-  // warn against non-factory defaults for Object & Array
-  if ("development" !== 'production' && isObject(def)) {
-    warn(
-      'Invalid default value for prop "' + key + '": ' +
-      'Props with type Object/Array must use a factory function ' +
-      'to return the default value.',
-      vm
-    );
-  }
-  // the raw prop value was also undefined from previous render,
-  // return previous default value to avoid unnecessary watcher trigger
-  if (vm && vm.$options.propsData &&
-    vm.$options.propsData[key] === undefined &&
-    vm._props[key] !== undefined
-  ) {
-    return vm._props[key]
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
+      }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
+    }
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
+
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
+
+  /**
+   * Validate component names
+   */
+  function checkComponents (options) {
+    for (var key in options.components) {
+      validateComponentName(key);
+    }
+  }
+
+  function validateComponentName (name) {
+    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+      warn(
+        'Invalid component name: "' + name + '". Component names ' +
+        'should conform to valid custom element name in html5 specification.'
+      );
+    }
+    if (isBuiltInTag(name) || config.isReservedTag(name)) {
+      warn(
+        'Do not use built-in or reserved HTML elements as component ' +
+        'id: ' + name
+      );
+    }
+  }
+
+  /**
+   * Ensure all props option syntax are normalized into the
+   * Object-based format.
+   */
+  function normalizeProps (options, vm) {
+    var props = options.props;
+    if (!props) { return }
+    var res = {};
+    var i, val, name;
+    if (Array.isArray(props)) {
+      i = props.length;
+      while (i--) {
+        val = props[i];
+        if (typeof val === 'string') {
+          name = camelize(val);
+          res[name] = { type: null };
+        } else {
+          warn('props must be strings when using array syntax.');
+        }
+      }
+    } else if (isPlainObject(props)) {
+      for (var key in props) {
+        val = props[key];
+        name = camelize(key);
+        res[name] = isPlainObject(val)
+          ? val
+          : { type: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"props\": expected an Array or an Object, " +
+        "but got " + (toRawType(props)) + ".",
+        vm
+      );
+    }
+    options.props = res;
+  }
+
+  /**
+   * Normalize all injections into Object-based format
+   */
+  function normalizeInject (options, vm) {
+    var inject = options.inject;
+    if (!inject) { return }
+    var normalized = options.inject = {};
+    if (Array.isArray(inject)) {
+      for (var i = 0; i < inject.length; i++) {
+        normalized[inject[i]] = { from: inject[i] };
+      }
+    } else if (isPlainObject(inject)) {
+      for (var key in inject) {
+        var val = inject[key];
+        normalized[key] = isPlainObject(val)
+          ? extend({ from: key }, val)
+          : { from: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"inject\": expected an Array or an Object, " +
+        "but got " + (toRawType(inject)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Normalize raw function directives into object format.
+   */
+  function normalizeDirectives (options) {
+    var dirs = options.directives;
+    if (dirs) {
+      for (var key in dirs) {
+        var def$$1 = dirs[key];
+        if (typeof def$$1 === 'function') {
+          dirs[key] = { bind: def$$1, update: def$$1 };
+        }
+      }
+    }
+  }
+
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
+      warn(
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Merge two option objects into a new one.
+   * Core utility used in both instantiation and inheritance.
+   */
+  function mergeOptions (
+    parent,
+    child,
+    vm
+  ) {
+    {
+      checkComponents(child);
+    }
+
+    if (typeof child === 'function') {
+      child = child.options;
+    }
+
+    normalizeProps(child, vm);
+    normalizeInject(child, vm);
+    normalizeDirectives(child);
+
+    // Apply extends and mixins on the child options,
+    // but only if it is a raw options object that isn't
+    // the result of another mergeOptions call.
+    // Only merged options has the _base property.
+    if (!child._base) {
+      if (child.extends) {
+        parent = mergeOptions(parent, child.extends, vm);
+      }
+      if (child.mixins) {
+        for (var i = 0, l = child.mixins.length; i < l; i++) {
+          parent = mergeOptions(parent, child.mixins[i], vm);
+        }
+      }
+    }
+
+    var options = {};
+    var key;
+    for (key in parent) {
+      mergeField(key);
+    }
+    for (key in child) {
+      if (!hasOwn(parent, key)) {
+        mergeField(key);
+      }
+    }
+    function mergeField (key) {
+      var strat = strats[key] || defaultStrat;
+      options[key] = strat(parent[key], child[key], vm, key);
+    }
+    return options
+  }
+
+  /**
+   * Resolve an asset.
+   * This function is used because child instances need access
+   * to assets defined in its ancestor chain.
+   */
+  function resolveAsset (
+    options,
+    type,
+    id,
+    warnMissing
+  ) {
+    /* istanbul ignore if */
+    if (typeof id !== 'string') {
+      return
+    }
+    var assets = options[type];
+    // check local registration variations first
+    if (hasOwn(assets, id)) { return assets[id] }
+    var camelizedId = camelize(id);
+    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+    var PascalCaseId = capitalize(camelizedId);
+    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+    // fallback to prototype chain
+    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+    if (warnMissing && !res) {
+      warn(
+        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+        options
+      );
+    }
+    return res
+  }
+
+  /*  */
+
+
+
+  function validateProp (
+    key,
+    propOptions,
+    propsData,
+    vm
+  ) {
+    var prop = propOptions[key];
+    var absent = !hasOwn(propsData, key);
+    var value = propsData[key];
+    // boolean casting
+    var booleanIndex = getTypeIndex(Boolean, prop.type);
+    if (booleanIndex > -1) {
+      if (absent && !hasOwn(prop, 'default')) {
+        value = false;
+      } else if (value === '' || value === hyphenate(key)) {
+        // only cast empty string / same name to boolean if
+        // boolean has higher priority
+        var stringIndex = getTypeIndex(String, prop.type);
+        if (stringIndex < 0 || booleanIndex < stringIndex) {
+          value = true;
+        }
+      }
+    }
+    // check default value
+    if (value === undefined) {
+      value = getPropDefaultValue(vm, prop, key);
+      // since the default value is a fresh copy,
+      // make sure to observe it.
+      var prevShouldObserve = shouldObserve;
+      toggleObserving(true);
+      observe(value);
+      toggleObserving(prevShouldObserve);
+    }
+    {
+      assertProp(prop, key, value, vm, absent);
+    }
+    return value
+  }
+
+  /**
+   * Get the default value of a prop.
+   */
+  function getPropDefaultValue (vm, prop, key) {
+    // no default, return undefined
+    if (!hasOwn(prop, 'default')) {
+      return undefined
+    }
+    var def = prop.default;
+    // warn against non-factory defaults for Object & Array
+    if (isObject(def)) {
+      warn(
+        'Invalid default value for prop "' + key + '": ' +
+        'Props with type Object/Array must use a factory function ' +
+        'to return the default value.',
+        vm
+      );
+    }
+    // the raw prop value was also undefined from previous render,
+    // return previous default value to avoid unnecessary watcher trigger
+    if (vm && vm.$options.propsData &&
+      vm.$options.propsData[key] === undefined &&
+      vm._props[key] !== undefined
+    ) {
+      return vm._props[key]
+    }
+    // call factory function for non-Function types
+    // a value is Function if its prototype is function even across different execution context
+    return typeof def === 'function' && getType(prop.type) !== 'Function'
+      ? def.call(vm)
+      : def
+  }
+
+  /**
+   * Assert whether a prop is valid.
+   */
+  function assertProp (
+    prop,
+    name,
+    value,
+    vm,
+    absent
+  ) {
+    if (prop.required && absent) {
+      warn(
+        'Missing required prop: "' + name + '"',
+        vm
+      );
+      return
+    }
+    if (value == null && !prop.required) {
+      return
+    }
+    var type = prop.type;
+    var valid = !type || type === true;
+    var expectedTypes = [];
+    if (type) {
+      if (!Array.isArray(type)) {
+        type = [type];
+      }
+      for (var i = 0; i < type.length && !valid; i++) {
+        var assertedType = assertType(value, type[i], vm);
+        expectedTypes.push(assertedType.expectedType || '');
+        valid = assertedType.valid;
+      }
+    }
+
+    var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+    if (!valid && haveExpectedTypes) {
+      warn(
+        getInvalidTypeMessage(name, value, expectedTypes),
+        vm
+      );
+      return
+    }
+    var validator = prop.validator;
+    if (validator) {
+      if (!validator(value)) {
+        warn(
+          'Invalid prop: custom validator check failed for prop "' + name + '".',
+          vm
+        );
+      }
+    }
+  }
+
+  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+  function assertType (value, type, vm) {
+    var valid;
+    var expectedType = getType(type);
+    if (simpleCheckRE.test(expectedType)) {
+      var t = typeof value;
+      valid = t === expectedType.toLowerCase();
+      // for primitive wrapper objects
+      if (!valid && t === 'object') {
+        valid = value instanceof type;
+      }
+    } else if (expectedType === 'Object') {
+      valid = isPlainObject(value);
+    } else if (expectedType === 'Array') {
+      valid = Array.isArray(value);
+    } else {
+      try {
+        valid = value instanceof type;
+      } catch (e) {
+        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+        valid = false;
+      }
+    }
+    return {
+      valid: valid,
+      expectedType: expectedType
+    }
+  }
+
+  var functionTypeCheckRE = /^\s*function (\w+)/;
+
+  /**
+   * Use function string name to check built-in types,
+   * because a simple equality check will fail when running
+   * across different vms / iframes.
+   */
+  function getType (fn) {
+    var match = fn && fn.toString().match(functionTypeCheckRE);
+    return match ? match[1] : ''
+  }
+
+  function isSameType (a, b) {
+    return getType(a) === getType(b)
+  }
+
+  function getTypeIndex (type, expectedTypes) {
+    if (!Array.isArray(expectedTypes)) {
+      return isSameType(expectedTypes, type) ? 0 : -1
+    }
+    for (var i = 0, len = expectedTypes.length; i < len; i++) {
+      if (isSameType(expectedTypes[i], type)) {
+        return i
+      }
+    }
+    return -1
+  }
+
+  function getInvalidTypeMessage (name, value, expectedTypes) {
+    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', '));
+    var expectedType = expectedTypes[0];
+    var receivedType = toRawType(value);
+    // check if we need to specify expected value
+    if (
+      expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      isExplicable(typeof value) &&
+      !isBoolean(expectedType, receivedType)
+    ) {
+      message += " with value " + (styleValue(value, expectedType));
+    }
+    message += ", got " + receivedType + " ";
+    // check if we need to specify received value
+    if (isExplicable(receivedType)) {
+      message += "with value " + (styleValue(value, receivedType)) + ".";
+    }
+    return message
+  }
+
+  function styleValue (value, type) {
+    if (type === 'String') {
+      return ("\"" + value + "\"")
+    } else if (type === 'Number') {
+      return ("" + (Number(value)))
+    } else {
+      return ("" + value)
+    }
+  }
+
+  var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+  function isExplicable (value) {
+    return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+  }
+
+  function isBoolean () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+  }
+
+  /*  */
+
+  function handleError (err, vm, info) {
+    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+    // See: https://github.com/vuejs/vuex/issues/1505
+    pushTarget();
+    try {
+      if (vm) {
+        var cur = vm;
+        while ((cur = cur.$parent)) {
+          var hooks = cur.$options.errorCaptured;
+          if (hooks) {
+            for (var i = 0; i < hooks.length; i++) {
+              try {
+                var capture = hooks[i].call(cur, err, vm, info) === false;
+                if (capture) { return }
+              } catch (e) {
+                globalHandleError(e, cur, 'errorCaptured hook');
+              }
+            }
+          }
+        }
+      }
+      globalHandleError(err, vm, info);
+    } finally {
+      popTarget();
+    }
+  }
+
+  function invokeWithErrorHandling (
+    handler,
+    context,
+    args,
+    vm,
+    info
+  ) {
+    var res;
+    try {
+      res = args ? handler.apply(context, args) : handler.call(context);
+      if (res && !res._isVue && isPromise(res) && !res._handled) {
+        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+        // issue #9511
+        // avoid catch triggering multiple times when nested calls
+        res._handled = true;
+      }
+    } catch (e) {
+      handleError(e, vm, info);
+    }
+    return res
+  }
+
+  function globalHandleError (err, vm, info) {
+    if (config.errorHandler) {
+      try {
+        return config.errorHandler.call(null, err, vm, info)
+      } catch (e) {
+        // if the user intentionally throws the original error in the handler,
+        // do not log it twice
+        if (e !== err) {
+          logError(e, null, 'config.errorHandler');
+        }
+      }
+    }
+    logError(err, vm, info);
+  }
+
+  function logError (err, vm, info) {
+    {
+      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+    }
+    /* istanbul ignore else */
+    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+      console.error(err);
+    } else {
+      throw err
+    }
+  }
+
+  /*  */
+
+  var isUsingMicroTask = false;
+
+  var callbacks = [];
+  var pending = false;
+
+  function flushCallbacks () {
+    pending = false;
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
+    }
+  }
+
+  // Here we have async deferring wrappers using microtasks.
+  // In 2.5 we used (macro) tasks (in combination with microtasks).
+  // However, it has subtle problems when state is changed right before repaint
+  // (e.g. #6813, out-in transitions).
+  // Also, using (macro) tasks in event handler would cause some weird behaviors
+  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+  // So we now use microtasks everywhere, again.
+  // A major drawback of this tradeoff is that there are some scenarios
+  // where microtasks have too high a priority and fire in between supposedly
+  // sequential events (e.g. #4521, #6690, which have workarounds)
+  // or even between bubbling of the same event (#6566).
+  var timerFunc;
+
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) {
+    var p = Promise.resolve();
+    timerFunc = function () {
+      p.then(flushCallbacks);
+      // In problematic UIWebViews, Promise.then doesn't completely break, but
+      // it can get stuck in a weird state where callbacks are pushed into the
+      // microtask queue but the queue isn't being flushed, until the browser
+      // needs to do some other work, e.g. handle a timer. Therefore we can
+      // "force" the microtask queue to be flushed by adding an empty timer.
+      if (isIOS) { setTimeout(noop); }
+    };
+    isUsingMicroTask = true;
+  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+    timerFunc = function () {
+      counter = (counter + 1) % 2;
+      textNode.data = String(counter);
+    };
+    isUsingMicroTask = true;
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+    // Fallback to setImmediate.
+    // Technically it leverages the (macro) task queue,
+    // but it is still a better choice than setTimeout.
+    timerFunc = function () {
+      setImmediate(flushCallbacks);
+    };
+  } else {
+    // Fallback to setTimeout.
+    timerFunc = function () {
+      setTimeout(flushCallbacks, 0);
+    };
+  }
+
+  function nextTick (cb, ctx) {
+    var _resolve;
+    callbacks.push(function () {
+      if (cb) {
+        try {
+          cb.call(ctx);
+        } catch (e) {
+          handleError(e, ctx, 'nextTick');
+        }
+      } else if (_resolve) {
+        _resolve(ctx);
+      }
+    });
+    if (!pending) {
+      pending = true;
+      timerFunc();
+    }
+    // $flow-disable-line
+    if (!cb && typeof Promise !== 'undefined') {
+      return new Promise(function (resolve) {
+        _resolve = resolve;
+      })
+    }
+  }
+
+  /*  */
+
+  var mark;
+  var measure;
+
+  {
+    var perf = inBrowser && window.performance;
+    /* istanbul ignore if */
+    if (
+      perf &&
+      perf.mark &&
+      perf.measure &&
+      perf.clearMarks &&
+      perf.clearMeasures
+    ) {
+      mark = function (tag) { return perf.mark(tag); };
+      measure = function (name, startTag, endTag) {
+        perf.measure(name, startTag, endTag);
+        perf.clearMarks(startTag);
+        perf.clearMarks(endTag);
+        // perf.clearMeasures(name)
+      };
+    }
+  }
+
+  /* not type checking this file because flow doesn't play well with Proxy */
+
+  var initProxy;
+
+  {
+    var allowedGlobals = makeMap(
+      'Infinity,undefined,NaN,isFinite,isNaN,' +
+      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+      'require' // for Webpack/Browserify
+    );
+
+    var warnNonPresent = function (target, key) {
+      warn(
+        "Property or method \"" + key + "\" is not defined on the instance but " +
+        'referenced during render. Make sure that this property is reactive, ' +
+        'either in the data option, or for class-based components, by ' +
+        'initializing the property. ' +
+        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+        target
+      );
+    };
+
+    var warnReservedPrefix = function (target, key) {
+      warn(
+        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+        'prevent conflicts with Vue internals. ' +
+        'See: https://vuejs.org/v2/api/#data',
+        target
+      );
+    };
+
+    var hasProxy =
+      typeof Proxy !== 'undefined' && isNative(Proxy);
+
+    if (hasProxy) {
+      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+      config.keyCodes = new Proxy(config.keyCodes, {
+        set: function set (target, key, value) {
+          if (isBuiltInModifier(key)) {
+            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+            return false
+          } else {
+            target[key] = value;
+            return true
+          }
+        }
+      });
+    }
+
+    var hasHandler = {
+      has: function has (target, key) {
+        var has = key in target;
+        var isAllowed = allowedGlobals(key) ||
+          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+        if (!has && !isAllowed) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return has || !isAllowed
+      }
+    };
+
+    var getHandler = {
+      get: function get (target, key) {
+        if (typeof key === 'string' && !(key in target)) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return target[key]
+      }
+    };
+
+    initProxy = function initProxy (vm) {
+      if (hasProxy) {
+        // determine which proxy handler to use
+        var options = vm.$options;
+        var handlers = options.render && options.render._withStripped
+          ? getHandler
+          : hasHandler;
+        vm._renderProxy = new Proxy(vm, handlers);
+      } else {
+        vm._renderProxy = vm;
+      }
+    };
+  }
+
+  /*  */
+
+  var seenObjects = new _Set();
+
+  /**
+   * Recursively traverse an object to evoke all converted
+   * getters, so that every nested property inside the object
+   * is collected as a "deep" dependency.
+   */
+  function traverse (val) {
+    _traverse(val, seenObjects);
+    seenObjects.clear();
+  }
+
+  function _traverse (val, seen) {
+    var i, keys;
+    var isA = Array.isArray(val);
+    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+      return
+    }
+    if (val.__ob__) {
+      var depId = val.__ob__.dep.id;
+      if (seen.has(depId)) {
+        return
+      }
+      seen.add(depId);
+    }
+    if (isA) {
+      i = val.length;
+      while (i--) { _traverse(val[i], seen); }
+    } else {
+      keys = Object.keys(val);
+      i = keys.length;
+      while (i--) { _traverse(val[keys[i]], seen); }
+    }
+  }
+
+  /*  */
+
+  var normalizeEvent = cached(function (name) {
+    var passive = name.charAt(0) === '&';
+    name = passive ? name.slice(1) : name;
+    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+    name = once$$1 ? name.slice(1) : name;
+    var capture = name.charAt(0) === '!';
+    name = capture ? name.slice(1) : name;
+    return {
+      name: name,
+      once: once$$1,
+      capture: capture,
+      passive: passive
+    }
+  });
+
+  function createFnInvoker (fns, vm) {
+    function invoker () {
+      var arguments$1 = arguments;
+
+      var fns = invoker.fns;
+      if (Array.isArray(fns)) {
+        var cloned = fns.slice();
+        for (var i = 0; i < cloned.length; i++) {
+          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+        }
+      } else {
+        // return handler return value for single handlers
+        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+      }
+    }
+    invoker.fns = fns;
+    return invoker
+  }
+
+  function updateListeners (
+    on,
+    oldOn,
+    add,
+    remove$$1,
+    createOnceHandler,
+    vm
+  ) {
+    var name, def$$1, cur, old, event;
+    for (name in on) {
+      def$$1 = cur = on[name];
+      old = oldOn[name];
+      event = normalizeEvent(name);
+      if (isUndef(cur)) {
+        warn(
+          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+          vm
+        );
+      } else if (isUndef(old)) {
+        if (isUndef(cur.fns)) {
+          cur = on[name] = createFnInvoker(cur, vm);
+        }
+        if (isTrue(event.once)) {
+          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+        }
+        add(event.name, cur, event.capture, event.passive, event.params);
+      } else if (cur !== old) {
+        old.fns = cur;
+        on[name] = old;
+      }
+    }
+    for (name in oldOn) {
+      if (isUndef(on[name])) {
+        event = normalizeEvent(name);
+        remove$$1(event.name, oldOn[name], event.capture);
+      }
+    }
+  }
+
+  /*  */
+
+  function mergeVNodeHook (def, hookKey, hook) {
+    if (def instanceof VNode) {
+      def = def.data.hook || (def.data.hook = {});
+    }
+    var invoker;
+    var oldHook = def[hookKey];
+
+    function wrappedHook () {
+      hook.apply(this, arguments);
+      // important: remove merged hook to ensure it's called only once
+      // and prevent memory leak
+      remove(invoker.fns, wrappedHook);
+    }
+
+    if (isUndef(oldHook)) {
+      // no existing hook
+      invoker = createFnInvoker([wrappedHook]);
+    } else {
+      /* istanbul ignore if */
+      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+        // already a merged invoker
+        invoker = oldHook;
+        invoker.fns.push(wrappedHook);
+      } else {
+        // existing plain hook
+        invoker = createFnInvoker([oldHook, wrappedHook]);
+      }
+    }
+
+    invoker.merged = true;
+    def[hookKey] = invoker;
+  }
+
+  /*  */
+
+  function extractPropsFromVNodeData (
+    data,
+    Ctor,
+    tag
+  ) {
+    // we are only extracting raw values here.
+    // validation and default values are handled in the child
+    // component itself.
+    var propOptions = Ctor.options.props;
+    if (isUndef(propOptions)) {
+      return
+    }
+    var res = {};
+    var attrs = data.attrs;
+    var props = data.props;
+    if (isDef(attrs) || isDef(props)) {
+      for (var key in propOptions) {
+        var altKey = hyphenate(key);
+        {
+          var keyInLowerCase = key.toLowerCase();
+          if (
+            key !== keyInLowerCase &&
+            attrs && hasOwn(attrs, keyInLowerCase)
+          ) {
+            tip(
+              "Prop \"" + keyInLowerCase + "\" is passed to component " +
+              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+              " \"" + key + "\". " +
+              "Note that HTML attributes are case-insensitive and camelCased " +
+              "props need to use their kebab-case equivalents when using in-DOM " +
+              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+            );
+          }
+        }
+        checkProp(res, props, key, altKey, true) ||
+        checkProp(res, attrs, key, altKey, false);
+      }
+    }
+    return res
+  }
+
+  function checkProp (
+    res,
+    hash,
+    key,
+    altKey,
+    preserve
+  ) {
+    if (isDef(hash)) {
+      if (hasOwn(hash, key)) {
+        res[key] = hash[key];
+        if (!preserve) {
+          delete hash[key];
+        }
+        return true
+      } else if (hasOwn(hash, altKey)) {
+        res[key] = hash[altKey];
+        if (!preserve) {
+          delete hash[altKey];
+        }
+        return true
+      }
+    }
+    return false
+  }
+
+  /*  */
+
+  // The template compiler attempts to minimize the need for normalization by
+  // statically analyzing the template at compile time.
+  //
+  // For plain HTML markup, normalization can be completely skipped because the
+  // generated render function is guaranteed to return Array<VNode>. There are
+  // two cases where extra normalization is needed:
+
+  // 1. When the children contains components - because a functional component
+  // may return an Array instead of a single root. In this case, just a simple
+  // normalization is needed - if any child is an Array, we flatten the whole
+  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+  // because functional components already normalize their own children.
+  function simpleNormalizeChildren (children) {
+    for (var i = 0; i < children.length; i++) {
+      if (Array.isArray(children[i])) {
+        return Array.prototype.concat.apply([], children)
+      }
+    }
+    return children
+  }
+
+  // 2. When the children contains constructs that always generated nested Arrays,
+  // e.g. <template>, <slot>, v-for, or when the children is provided by user
+  // with hand-written render functions / JSX. In such cases a full normalization
+  // is needed to cater to all possible types of children values.
+  function normalizeChildren (children) {
+    return isPrimitive(children)
+      ? [createTextVNode(children)]
+      : Array.isArray(children)
+        ? normalizeArrayChildren(children)
+        : undefined
+  }
+
+  function isTextNode (node) {
+    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+  }
+
+  function normalizeArrayChildren (children, nestedIndex) {
+    var res = [];
+    var i, c, lastIndex, last;
+    for (i = 0; i < children.length; i++) {
+      c = children[i];
+      if (isUndef(c) || typeof c === 'boolean') { continue }
+      lastIndex = res.length - 1;
+      last = res[lastIndex];
+      //  nested
+      if (Array.isArray(c)) {
+        if (c.length > 0) {
+          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+          // merge adjacent text nodes
+          if (isTextNode(c[0]) && isTextNode(last)) {
+            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+            c.shift();
+          }
+          res.push.apply(res, c);
+        }
+      } else if (isPrimitive(c)) {
+        if (isTextNode(last)) {
+          // merge adjacent text nodes
+          // this is necessary for SSR hydration because text nodes are
+          // essentially merged when rendered to HTML strings
+          res[lastIndex] = createTextVNode(last.text + c);
+        } else if (c !== '') {
+          // convert primitive to vnode
+          res.push(createTextVNode(c));
+        }
+      } else {
+        if (isTextNode(c) && isTextNode(last)) {
+          // merge adjacent text nodes
+          res[lastIndex] = createTextVNode(last.text + c.text);
+        } else {
+          // default key for nested array children (likely generated by v-for)
+          if (isTrue(children._isVList) &&
+            isDef(c.tag) &&
+            isUndef(c.key) &&
+            isDef(nestedIndex)) {
+            c.key = "__vlist" + nestedIndex + "_" + i + "__";
+          }
+          res.push(c);
+        }
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  function initProvide (vm) {
+    var provide = vm.$options.provide;
+    if (provide) {
+      vm._provided = typeof provide === 'function'
+        ? provide.call(vm)
+        : provide;
+    }
+  }
+
+  function initInjections (vm) {
+    var result = resolveInject(vm.$options.inject, vm);
+    if (result) {
+      toggleObserving(false);
+      Object.keys(result).forEach(function (key) {
+        /* istanbul ignore else */
+        {
+          defineReactive$$1(vm, key, result[key], function () {
+            warn(
+              "Avoid mutating an injected value directly since the changes will be " +
+              "overwritten whenever the provided component re-renders. " +
+              "injection being mutated: \"" + key + "\"",
+              vm
+            );
+          });
+        }
+      });
+      toggleObserving(true);
+    }
+  }
+
+  function resolveInject (inject, vm) {
+    if (inject) {
+      // inject is :any because flow is not smart enough to figure out cached
+      var result = Object.create(null);
+      var keys = hasSymbol
+        ? Reflect.ownKeys(inject)
+        : Object.keys(inject);
+
+      for (var i = 0; i < keys.length; i++) {
+        var key = keys[i];
+        // #6574 in case the inject object is observed...
+        if (key === '__ob__') { continue }
+        var provideKey = inject[key].from;
+        var source = vm;
+        while (source) {
+          if (source._provided && hasOwn(source._provided, provideKey)) {
+            result[key] = source._provided[provideKey];
+            break
+          }
+          source = source.$parent;
+        }
+        if (!source) {
+          if ('default' in inject[key]) {
+            var provideDefault = inject[key].default;
+            result[key] = typeof provideDefault === 'function'
+              ? provideDefault.call(vm)
+              : provideDefault;
+          } else {
+            warn(("Injection \"" + key + "\" not found"), vm);
+          }
+        }
+      }
+      return result
+    }
+  }
+
+  /*  */
+
+
+
+  /**
+   * Runtime helper for resolving raw children VNodes into a slot object.
+   */
+  function resolveSlots (
+    children,
+    context
+  ) {
+    if (!children || !children.length) {
+      return {}
+    }
+    var slots = {};
+    for (var i = 0, l = children.length; i < l; i++) {
+      var child = children[i];
+      var data = child.data;
+      // remove slot attribute if the node is resolved as a Vue slot node
+      if (data && data.attrs && data.attrs.slot) {
+        delete data.attrs.slot;
+      }
+      // named slots should only be respected if the vnode was rendered in the
+      // same context.
+      if ((child.context === context || child.fnContext === context) &&
+        data && data.slot != null
+      ) {
+        var name = data.slot;
+        var slot = (slots[name] || (slots[name] = []));
+        if (child.tag === 'template') {
+          slot.push.apply(slot, child.children || []);
+        } else {
+          slot.push(child);
+        }
+      } else {
+        (slots.default || (slots.default = [])).push(child);
+      }
+    }
+    // ignore slots that contains only whitespace
+    for (var name$1 in slots) {
+      if (slots[name$1].every(isWhitespace)) {
+        delete slots[name$1];
+      }
+    }
+    return slots
+  }
+
+  function isWhitespace (node) {
+    return (node.isComment && !node.asyncFactory) || node.text === ' '
+  }
+
+  /*  */
+
+  function isAsyncPlaceholder (node) {
+    return node.isComment && node.asyncFactory
+  }
+
+  /*  */
+
+  function normalizeScopedSlots (
+    slots,
+    normalSlots,
+    prevSlots
+  ) {
+    var res;
+    var hasNormalSlots = Object.keys(normalSlots).length > 0;
+    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+    var key = slots && slots.$key;
+    if (!slots) {
+      res = {};
+    } else if (slots._normalized) {
+      // fast path 1: child component re-render only, parent did not change
+      return slots._normalized
+    } else if (
+      isStable &&
+      prevSlots &&
+      prevSlots !== emptyObject &&
+      key === prevSlots.$key &&
+      !hasNormalSlots &&
+      !prevSlots.$hasNormal
+    ) {
+      // fast path 2: stable scoped slots w/ no normal slots to proxy,
+      // only need to normalize once
+      return prevSlots
+    } else {
+      res = {};
+      for (var key$1 in slots) {
+        if (slots[key$1] && key$1[0] !== '$') {
+          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+        }
+      }
+    }
+    // expose normal slots on scopedSlots
+    for (var key$2 in normalSlots) {
+      if (!(key$2 in res)) {
+        res[key$2] = proxyNormalSlot(normalSlots, key$2);
+      }
+    }
+    // avoriaz seems to mock a non-extensible $scopedSlots object
+    // and when that is passed down this would cause an error
+    if (slots && Object.isExtensible(slots)) {
+      (slots)._normalized = res;
+    }
+    def(res, '$stable', isStable);
+    def(res, '$key', key);
+    def(res, '$hasNormal', hasNormalSlots);
+    return res
+  }
+
+  function normalizeScopedSlot(normalSlots, key, fn) {
+    var normalized = function () {
+      var res = arguments.length ? fn.apply(null, arguments) : fn({});
+      res = res && typeof res === 'object' && !Array.isArray(res)
+        ? [res] // single vnode
+        : normalizeChildren(res);
+      var vnode = res && res[0];
+      return res && (
+        !vnode ||
+        (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+      ) ? undefined
+        : res
+    };
+    // this is a slot using the new v-slot syntax without scope. although it is
+    // compiled as a scoped slot, render fn users would expect it to be present
+    // on this.$slots because the usage is semantically a normal slot.
+    if (fn.proxy) {
+      Object.defineProperty(normalSlots, key, {
+        get: normalized,
+        enumerable: true,
+        configurable: true
+      });
+    }
+    return normalized
+  }
+
+  function proxyNormalSlot(slots, key) {
+    return function () { return slots[key]; }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering v-for lists.
+   */
+  function renderList (
+    val,
+    render
+  ) {
+    var ret, i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      ret = new Array(val.length);
+      for (i = 0, l = val.length; i < l; i++) {
+        ret[i] = render(val[i], i);
+      }
+    } else if (typeof val === 'number') {
+      ret = new Array(val);
+      for (i = 0; i < val; i++) {
+        ret[i] = render(i + 1, i);
+      }
+    } else if (isObject(val)) {
+      if (hasSymbol && val[Symbol.iterator]) {
+        ret = [];
+        var iterator = val[Symbol.iterator]();
+        var result = iterator.next();
+        while (!result.done) {
+          ret.push(render(result.value, ret.length));
+          result = iterator.next();
+        }
+      } else {
+        keys = Object.keys(val);
+        ret = new Array(keys.length);
+        for (i = 0, l = keys.length; i < l; i++) {
+          key = keys[i];
+          ret[i] = render(val[key], key, i);
+        }
+      }
+    }
+    if (!isDef(ret)) {
+      ret = [];
+    }
+    (ret)._isVList = true;
+    return ret
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering <slot>
+   */
+  function renderSlot (
+    name,
+    fallbackRender,
+    props,
+    bindObject
+  ) {
+    var scopedSlotFn = this.$scopedSlots[name];
+    var nodes;
+    if (scopedSlotFn) {
+      // scoped slot
+      props = props || {};
+      if (bindObject) {
+        if (!isObject(bindObject)) {
+          warn('slot v-bind without argument expects an Object', this);
+        }
+        props = extend(extend({}, bindObject), props);
+      }
+      nodes =
+        scopedSlotFn(props) ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    } else {
+      nodes =
+        this.$slots[name] ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    }
+
+    var target = props && props.slot;
+    if (target) {
+      return this.$createElement('template', { slot: target }, nodes)
+    } else {
+      return nodes
+    }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for resolving filters
+   */
+  function resolveFilter (id) {
+    return resolveAsset(this.$options, 'filters', id, true) || identity
+  }
+
+  /*  */
+
+  function isKeyNotMatch (expect, actual) {
+    if (Array.isArray(expect)) {
+      return expect.indexOf(actual) === -1
+    } else {
+      return expect !== actual
+    }
+  }
+
+  /**
+   * Runtime helper for checking keyCodes from config.
+   * exposed as Vue.prototype._k
+   * passing in eventKeyName as last argument separately for backwards compat
+   */
+  function checkKeyCodes (
+    eventKeyCode,
+    key,
+    builtInKeyCode,
+    eventKeyName,
+    builtInKeyName
+  ) {
+    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+      return isKeyNotMatch(builtInKeyName, eventKeyName)
+    } else if (mappedKeyCode) {
+      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+    } else if (eventKeyName) {
+      return hyphenate(eventKeyName) !== key
+    }
+    return eventKeyCode === undefined
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for merging v-bind="object" into a VNode's data.
+   */
+  function bindObjectProps (
+    data,
+    tag,
+    value,
+    asProp,
+    isSync
+  ) {
+    if (value) {
+      if (!isObject(value)) {
+        warn(
+          'v-bind without argument expects an Object or Array value',
+          this
+        );
+      } else {
+        if (Array.isArray(value)) {
+          value = toObject(value);
+        }
+        var hash;
+        var loop = function ( key ) {
+          if (
+            key === 'class' ||
+            key === 'style' ||
+            isReservedAttribute(key)
+          ) {
+            hash = data;
+          } else {
+            var type = data.attrs && data.attrs.type;
+            hash = asProp || config.mustUseProp(tag, type, key)
+              ? data.domProps || (data.domProps = {})
+              : data.attrs || (data.attrs = {});
+          }
+          var camelizedKey = camelize(key);
+          var hyphenatedKey = hyphenate(key);
+          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+            hash[key] = value[key];
+
+            if (isSync) {
+              var on = data.on || (data.on = {});
+              on[("update:" + key)] = function ($event) {
+                value[key] = $event;
+              };
+            }
+          }
+        };
+
+        for (var key in value) loop( key );
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering static trees.
+   */
+  function renderStatic (
+    index,
+    isInFor
+  ) {
+    var cached = this._staticTrees || (this._staticTrees = []);
+    var tree = cached[index];
+    // if has already-rendered static tree and not inside v-for,
+    // we can reuse the same tree.
+    if (tree && !isInFor) {
+      return tree
+    }
+    // otherwise, render a fresh tree.
+    tree = cached[index] = this.$options.staticRenderFns[index].call(
+      this._renderProxy,
+      null,
+      this // for render fns generated for functional component templates
+    );
+    markStatic(tree, ("__static__" + index), false);
+    return tree
+  }
+
+  /**
+   * Runtime helper for v-once.
+   * Effectively it means marking the node as static with a unique key.
+   */
+  function markOnce (
+    tree,
+    index,
+    key
+  ) {
+    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+    return tree
+  }
+
+  function markStatic (
+    tree,
+    key,
+    isOnce
+  ) {
+    if (Array.isArray(tree)) {
+      for (var i = 0; i < tree.length; i++) {
+        if (tree[i] && typeof tree[i] !== 'string') {
+          markStaticNode(tree[i], (key + "_" + i), isOnce);
+        }
+      }
+    } else {
+      markStaticNode(tree, key, isOnce);
+    }
+  }
+
+  function markStaticNode (node, key, isOnce) {
+    node.isStatic = true;
+    node.key = key;
+    node.isOnce = isOnce;
+  }
+
+  /*  */
+
+  function bindObjectListeners (data, value) {
+    if (value) {
+      if (!isPlainObject(value)) {
+        warn(
+          'v-on without argument expects an Object value',
+          this
+        );
+      } else {
+        var on = data.on = data.on ? extend({}, data.on) : {};
+        for (var key in value) {
+          var existing = on[key];
+          var ours = value[key];
+          on[key] = existing ? [].concat(existing, ours) : ours;
+        }
+      }
+    }
+    return data
+  }
+
+  /*  */
+
+  function resolveScopedSlots (
+    fns, // see flow/vnode
+    res,
+    // the following are added in 2.6
+    hasDynamicKeys,
+    contentHashKey
+  ) {
+    res = res || { $stable: !hasDynamicKeys };
+    for (var i = 0; i < fns.length; i++) {
+      var slot = fns[i];
+      if (Array.isArray(slot)) {
+        resolveScopedSlots(slot, res, hasDynamicKeys);
+      } else if (slot) {
+        // marker for reverse proxying v-slot without scope on this.$slots
+        if (slot.proxy) {
+          slot.fn.proxy = true;
+        }
+        res[slot.key] = slot.fn;
+      }
+    }
+    if (contentHashKey) {
+      (res).$key = contentHashKey;
+    }
+    return res
+  }
+
+  /*  */
+
+  function bindDynamicKeys (baseObj, values) {
+    for (var i = 0; i < values.length; i += 2) {
+      var key = values[i];
+      if (typeof key === 'string' && key) {
+        baseObj[values[i]] = values[i + 1];
+      } else if (key !== '' && key !== null) {
+        // null is a special value for explicitly removing a binding
+        warn(
+          ("Invalid value for dynamic directive argument (expected string or null): " + key),
+          this
+        );
+      }
+    }
+    return baseObj
+  }
+
+  // helper to dynamically append modifier runtime markers to event names.
+  // ensure only append when value is already string, otherwise it will be cast
+  // to string and cause the type check to miss.
+  function prependModifier (value, symbol) {
+    return typeof value === 'string' ? symbol + value : value
+  }
+
+  /*  */
+
+  function installRenderHelpers (target) {
+    target._o = markOnce;
+    target._n = toNumber;
+    target._s = toString;
+    target._l = renderList;
+    target._t = renderSlot;
+    target._q = looseEqual;
+    target._i = looseIndexOf;
+    target._m = renderStatic;
+    target._f = resolveFilter;
+    target._k = checkKeyCodes;
+    target._b = bindObjectProps;
+    target._v = createTextVNode;
+    target._e = createEmptyVNode;
+    target._u = resolveScopedSlots;
+    target._g = bindObjectListeners;
+    target._d = bindDynamicKeys;
+    target._p = prependModifier;
+  }
+
+  /*  */
+
+  function FunctionalRenderContext (
+    data,
+    props,
+    children,
+    parent,
+    Ctor
+  ) {
+    var this$1 = this;
+
+    var options = Ctor.options;
+    // ensure the createElement function in functional components
+    // gets a unique context - this is necessary for correct named slot check
+    var contextVm;
+    if (hasOwn(parent, '_uid')) {
+      contextVm = Object.create(parent);
+      // $flow-disable-line
+      contextVm._original = parent;
+    } else {
+      // the context vm passed in is a functional context as well.
+      // in this case we want to make sure we are able to get a hold to the
+      // real context instance.
+      contextVm = parent;
+      // $flow-disable-line
+      parent = parent._original;
+    }
+    var isCompiled = isTrue(options._compiled);
+    var needNormalization = !isCompiled;
+
+    this.data = data;
+    this.props = props;
+    this.children = children;
+    this.parent = parent;
+    this.listeners = data.on || emptyObject;
+    this.injections = resolveInject(options.inject, parent);
+    this.slots = function () {
+      if (!this$1.$slots) {
+        normalizeScopedSlots(
+          data.scopedSlots,
+          this$1.$slots = resolveSlots(children, parent)
+        );
+      }
+      return this$1.$slots
+    };
+
+    Object.defineProperty(this, 'scopedSlots', ({
+      enumerable: true,
+      get: function get () {
+        return normalizeScopedSlots(data.scopedSlots, this.slots())
+      }
+    }));
+
+    // support for compiled functional template
+    if (isCompiled) {
+      // exposing $options for renderStatic()
+      this.$options = options;
+      // pre-resolve slots for renderSlot()
+      this.$slots = this.slots();
+      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+    }
+
+    if (options._scopeId) {
+      this._c = function (a, b, c, d) {
+        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+        if (vnode && !Array.isArray(vnode)) {
+          vnode.fnScopeId = options._scopeId;
+          vnode.fnContext = parent;
+        }
+        return vnode
+      };
+    } else {
+      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+    }
+  }
+
+  installRenderHelpers(FunctionalRenderContext.prototype);
+
+  function createFunctionalComponent (
+    Ctor,
+    propsData,
+    data,
+    contextVm,
+    children
+  ) {
+    var options = Ctor.options;
+    var props = {};
+    var propOptions = options.props;
+    if (isDef(propOptions)) {
+      for (var key in propOptions) {
+        props[key] = validateProp(key, propOptions, propsData || emptyObject);
+      }
+    } else {
+      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+      if (isDef(data.props)) { mergeProps(props, data.props); }
+    }
+
+    var renderContext = new FunctionalRenderContext(
+      data,
+      props,
+      children,
+      contextVm,
+      Ctor
+    );
+
+    var vnode = options.render.call(null, renderContext._c, renderContext);
+
+    if (vnode instanceof VNode) {
+      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+    } else if (Array.isArray(vnode)) {
+      var vnodes = normalizeChildren(vnode) || [];
+      var res = new Array(vnodes.length);
+      for (var i = 0; i < vnodes.length; i++) {
+        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+      }
+      return res
+    }
+  }
+
+  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+    // #7817 clone node before setting fnContext, otherwise if the node is reused
+    // (e.g. it was from a cached normal slot) the fnContext causes named slots
+    // that should not be matched to match.
+    var clone = cloneVNode(vnode);
+    clone.fnContext = contextVm;
+    clone.fnOptions = options;
+    {
+      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+    }
+    if (data.slot) {
+      (clone.data || (clone.data = {})).slot = data.slot;
+    }
+    return clone
+  }
+
+  function mergeProps (to, from) {
+    for (var key in from) {
+      to[camelize(key)] = from[key];
+    }
+  }
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  // inline hooks to be invoked on component VNodes during patch
+  var componentVNodeHooks = {
+    init: function init (vnode, hydrating) {
+      if (
+        vnode.componentInstance &&
+        !vnode.componentInstance._isDestroyed &&
+        vnode.data.keepAlive
+      ) {
+        // kept-alive components, treat as a patch
+        var mountedNode = vnode; // work around flow
+        componentVNodeHooks.prepatch(mountedNode, mountedNode);
+      } else {
+        var child = vnode.componentInstance = createComponentInstanceForVnode(
+          vnode,
+          activeInstance
+        );
+        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+      }
+    },
+
+    prepatch: function prepatch (oldVnode, vnode) {
+      var options = vnode.componentOptions;
+      var child = vnode.componentInstance = oldVnode.componentInstance;
+      updateChildComponent(
+        child,
+        options.propsData, // updated props
+        options.listeners, // updated listeners
+        vnode, // new parent vnode
+        options.children // new children
+      );
+    },
+
+    insert: function insert (vnode) {
+      var context = vnode.context;
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isMounted) {
+        componentInstance._isMounted = true;
+        callHook(componentInstance, 'mounted');
+      }
+      if (vnode.data.keepAlive) {
+        if (context._isMounted) {
+          // vue-router#1212
+          // During updates, a kept-alive component's child components may
+          // change, so directly walking the tree here may call activated hooks
+          // on incorrect children. Instead we push them into a queue which will
+          // be processed after the whole patch process ended.
+          queueActivatedComponent(componentInstance);
+        } else {
+          activateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    },
+
+    destroy: function destroy (vnode) {
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isDestroyed) {
+        if (!vnode.data.keepAlive) {
+          componentInstance.$destroy();
+        } else {
+          deactivateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    }
+  };
+
+  var hooksToMerge = Object.keys(componentVNodeHooks);
+
+  function createComponent (
+    Ctor,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    if (isUndef(Ctor)) {
+      return
+    }
+
+    var baseCtor = context.$options._base;
+
+    // plain options object: turn it into a constructor
+    if (isObject(Ctor)) {
+      Ctor = baseCtor.extend(Ctor);
+    }
+
+    // if at this stage it's not a constructor or an async component factory,
+    // reject.
+    if (typeof Ctor !== 'function') {
+      {
+        warn(("Invalid Component definition: " + (String(Ctor))), context);
+      }
+      return
+    }
+
+    // async component
+    var asyncFactory;
+    if (isUndef(Ctor.cid)) {
+      asyncFactory = Ctor;
+      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+      if (Ctor === undefined) {
+        // return a placeholder node for async component, which is rendered
+        // as a comment node but preserves all the raw information for the node.
+        // the information will be used for async server-rendering and hydration.
+        return createAsyncPlaceholder(
+          asyncFactory,
+          data,
+          context,
+          children,
+          tag
+        )
+      }
+    }
+
+    data = data || {};
+
+    // resolve constructor options in case global mixins are applied after
+    // component constructor creation
+    resolveConstructorOptions(Ctor);
+
+    // transform component v-model data into props & events
+    if (isDef(data.model)) {
+      transformModel(Ctor.options, data);
+    }
+
+    // extract props
+    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+    // functional component
+    if (isTrue(Ctor.options.functional)) {
+      return createFunctionalComponent(Ctor, propsData, data, context, children)
+    }
+
+    // extract listeners, since these needs to be treated as
+    // child component listeners instead of DOM listeners
+    var listeners = data.on;
+    // replace with listeners with .native modifier
+    // so it gets processed during parent component patch.
+    data.on = data.nativeOn;
+
+    if (isTrue(Ctor.options.abstract)) {
+      // abstract components do not keep anything
+      // other than props & listeners & slot
+
+      // work around flow
+      var slot = data.slot;
+      data = {};
+      if (slot) {
+        data.slot = slot;
+      }
+    }
+
+    // install component management hooks onto the placeholder node
+    installComponentHooks(data);
+
+    // return a placeholder vnode
+    var name = Ctor.options.name || tag;
+    var vnode = new VNode(
+      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+      data, undefined, undefined, undefined, context,
+      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+      asyncFactory
+    );
+
+    return vnode
+  }
+
+  function createComponentInstanceForVnode (
+    // we know it's MountedComponentVNode but flow doesn't
+    vnode,
+    // activeInstance in lifecycle state
+    parent
+  ) {
+    var options = {
+      _isComponent: true,
+      _parentVnode: vnode,
+      parent: parent
+    };
+    // check inline-template render functions
+    var inlineTemplate = vnode.data.inlineTemplate;
+    if (isDef(inlineTemplate)) {
+      options.render = inlineTemplate.render;
+      options.staticRenderFns = inlineTemplate.staticRenderFns;
+    }
+    return new vnode.componentOptions.Ctor(options)
+  }
+
+  function installComponentHooks (data) {
+    var hooks = data.hook || (data.hook = {});
+    for (var i = 0; i < hooksToMerge.length; i++) {
+      var key = hooksToMerge[i];
+      var existing = hooks[key];
+      var toMerge = componentVNodeHooks[key];
+      if (existing !== toMerge && !(existing && existing._merged)) {
+        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+      }
+    }
+  }
+
+  function mergeHook$1 (f1, f2) {
+    var merged = function (a, b) {
+      // flow complains about extra args which is why we use any
+      f1(a, b);
+      f2(a, b);
+    };
+    merged._merged = true;
+    return merged
+  }
+
+  // transform component v-model info (value and callback) into
+  // prop and event handler respectively.
+  function transformModel (options, data) {
+    var prop = (options.model && options.model.prop) || 'value';
+    var event = (options.model && options.model.event) || 'input'
+    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+    var on = data.on || (data.on = {});
+    var existing = on[event];
+    var callback = data.model.callback;
+    if (isDef(existing)) {
+      if (
+        Array.isArray(existing)
+          ? existing.indexOf(callback) === -1
+          : existing !== callback
+      ) {
+        on[event] = [callback].concat(existing);
+      }
+    } else {
+      on[event] = callback;
+    }
+  }
+
+  /*  */
+
+  var SIMPLE_NORMALIZE = 1;
+  var ALWAYS_NORMALIZE = 2;
+
+  // wrapper function for providing a more flexible interface
+  // without getting yelled at by flow
+  function createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType,
+    alwaysNormalize
+  ) {
+    if (Array.isArray(data) || isPrimitive(data)) {
+      normalizationType = children;
+      children = data;
+      data = undefined;
+    }
+    if (isTrue(alwaysNormalize)) {
+      normalizationType = ALWAYS_NORMALIZE;
+    }
+    return _createElement(context, tag, data, children, normalizationType)
+  }
+
+  function _createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType
+  ) {
+    if (isDef(data) && isDef((data).__ob__)) {
+      warn(
+        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+        'Always create fresh vnode data objects in each render!',
+        context
+      );
+      return createEmptyVNode()
+    }
+    // object syntax in v-bind
+    if (isDef(data) && isDef(data.is)) {
+      tag = data.is;
+    }
+    if (!tag) {
+      // in case of component :is set to falsy value
+      return createEmptyVNode()
+    }
+    // warn against non-primitive key
+    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+    ) {
+      {
+        warn(
+          'Avoid using non-primitive value as key, ' +
+          'use string/number value instead.',
+          context
+        );
+      }
+    }
+    // support single function children as default scoped slot
+    if (Array.isArray(children) &&
+      typeof children[0] === 'function'
+    ) {
+      data = data || {};
+      data.scopedSlots = { default: children[0] };
+      children.length = 0;
+    }
+    if (normalizationType === ALWAYS_NORMALIZE) {
+      children = normalizeChildren(children);
+    } else if (normalizationType === SIMPLE_NORMALIZE) {
+      children = simpleNormalizeChildren(children);
+    }
+    var vnode, ns;
+    if (typeof tag === 'string') {
+      var Ctor;
+      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+      if (config.isReservedTag(tag)) {
+        // platform built-in elements
+        if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+          warn(
+            ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+            context
+          );
+        }
+        vnode = new VNode(
+          config.parsePlatformTagName(tag), data, children,
+          undefined, undefined, context
+        );
+      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+        // component
+        vnode = createComponent(Ctor, data, context, children, tag);
+      } else {
+        // unknown or unlisted namespaced elements
+        // check at runtime because it may get assigned a namespace when its
+        // parent normalizes children
+        vnode = new VNode(
+          tag, data, children,
+          undefined, undefined, context
+        );
+      }
+    } else {
+      // direct component options / constructor
+      vnode = createComponent(tag, data, context, children);
+    }
+    if (Array.isArray(vnode)) {
+      return vnode
+    } else if (isDef(vnode)) {
+      if (isDef(ns)) { applyNS(vnode, ns); }
+      if (isDef(data)) { registerDeepBindings(data); }
+      return vnode
+    } else {
+      return createEmptyVNode()
+    }
+  }
+
+  function applyNS (vnode, ns, force) {
+    vnode.ns = ns;
+    if (vnode.tag === 'foreignObject') {
+      // use default namespace inside foreignObject
+      ns = undefined;
+      force = true;
+    }
+    if (isDef(vnode.children)) {
+      for (var i = 0, l = vnode.children.length; i < l; i++) {
+        var child = vnode.children[i];
+        if (isDef(child.tag) && (
+          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+          applyNS(child, ns, force);
+        }
+      }
+    }
+  }
+
+  // ref #5318
+  // necessary to ensure parent re-render when deep bindings like :style and
+  // :class are used on slot nodes
+  function registerDeepBindings (data) {
+    if (isObject(data.style)) {
+      traverse(data.style);
+    }
+    if (isObject(data.class)) {
+      traverse(data.class);
+    }
+  }
+
+  /*  */
+
+  function initRender (vm) {
+    vm._vnode = null; // the root of the child tree
+    vm._staticTrees = null; // v-once cached trees
+    var options = vm.$options;
+    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+    var renderContext = parentVnode && parentVnode.context;
+    vm.$slots = resolveSlots(options._renderChildren, renderContext);
+    vm.$scopedSlots = emptyObject;
+    // bind the createElement fn to this instance
+    // so that we get proper render context inside it.
+    // args order: tag, data, children, normalizationType, alwaysNormalize
+    // internal version is used by render functions compiled from templates
+    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+    // normalization is always applied for the public version, used in
+    // user-written render functions.
+    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+    // $attrs & $listeners are exposed for easier HOC creation.
+    // they need to be reactive so that HOCs using them are always updated
+    var parentData = parentVnode && parentVnode.data;
+
+    /* istanbul ignore else */
+    {
+      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+      }, true);
+      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+      }, true);
+    }
+  }
+
+  var currentRenderingInstance = null;
+
+  function renderMixin (Vue) {
+    // install runtime convenience helpers
+    installRenderHelpers(Vue.prototype);
+
+    Vue.prototype.$nextTick = function (fn) {
+      return nextTick(fn, this)
+    };
+
+    Vue.prototype._render = function () {
+      var vm = this;
+      var ref = vm.$options;
+      var render = ref.render;
+      var _parentVnode = ref._parentVnode;
+
+      if (_parentVnode) {
+        vm.$scopedSlots = normalizeScopedSlots(
+          _parentVnode.data.scopedSlots,
+          vm.$slots,
+          vm.$scopedSlots
+        );
+      }
+
+      // set parent vnode. this allows render functions to have access
+      // to the data on the placeholder node.
+      vm.$vnode = _parentVnode;
+      // render self
+      var vnode;
+      try {
+        // There's no need to maintain a stack because all render fns are called
+        // separately from one another. Nested component's render fns are called
+        // when parent component is patched.
+        currentRenderingInstance = vm;
+        vnode = render.call(vm._renderProxy, vm.$createElement);
+      } catch (e) {
+        handleError(e, vm, "render");
+        // return error render result,
+        // or previous vnode to prevent render error causing blank component
+        /* istanbul ignore else */
+        if (vm.$options.renderError) {
+          try {
+            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+          } catch (e) {
+            handleError(e, vm, "renderError");
+            vnode = vm._vnode;
+          }
+        } else {
+          vnode = vm._vnode;
+        }
+      } finally {
+        currentRenderingInstance = null;
+      }
+      // if the returned array contains only a single node, allow it
+      if (Array.isArray(vnode) && vnode.length === 1) {
+        vnode = vnode[0];
+      }
+      // return empty vnode in case the render function errored out
+      if (!(vnode instanceof VNode)) {
+        if (Array.isArray(vnode)) {
+          warn(
+            'Multiple root nodes returned from render function. Render function ' +
+            'should return a single root node.',
+            vm
+          );
+        }
+        vnode = createEmptyVNode();
+      }
+      // set parent
+      vnode.parent = _parentVnode;
+      return vnode
+    };
+  }
+
+  /*  */
+
+  function ensureCtor (comp, base) {
+    if (
+      comp.__esModule ||
+      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+    ) {
+      comp = comp.default;
+    }
+    return isObject(comp)
+      ? base.extend(comp)
+      : comp
+  }
+
+  function createAsyncPlaceholder (
+    factory,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    var node = createEmptyVNode();
+    node.asyncFactory = factory;
+    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+    return node
+  }
+
+  function resolveAsyncComponent (
+    factory,
+    baseCtor
+  ) {
+    if (isTrue(factory.error) && isDef(factory.errorComp)) {
+      return factory.errorComp
+    }
+
+    if (isDef(factory.resolved)) {
+      return factory.resolved
+    }
+
+    var owner = currentRenderingInstance;
+    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+      // already pending
+      factory.owners.push(owner);
+    }
+
+    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+      return factory.loadingComp
+    }
+
+    if (owner && !isDef(factory.owners)) {
+      var owners = factory.owners = [owner];
+      var sync = true;
+      var timerLoading = null;
+      var timerTimeout = null
+
+      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+      var forceRender = function (renderCompleted) {
+        for (var i = 0, l = owners.length; i < l; i++) {
+          (owners[i]).$forceUpdate();
+        }
+
+        if (renderCompleted) {
+          owners.length = 0;
+          if (timerLoading !== null) {
+            clearTimeout(timerLoading);
+            timerLoading = null;
+          }
+          if (timerTimeout !== null) {
+            clearTimeout(timerTimeout);
+            timerTimeout = null;
+          }
+        }
+      };
+
+      var resolve = once(function (res) {
+        // cache resolved
+        factory.resolved = ensureCtor(res, baseCtor);
+        // invoke callbacks only if this is not a synchronous resolve
+        // (async resolves are shimmed as synchronous during SSR)
+        if (!sync) {
+          forceRender(true);
+        } else {
+          owners.length = 0;
+        }
+      });
+
+      var reject = once(function (reason) {
+        warn(
+          "Failed to resolve async component: " + (String(factory)) +
+          (reason ? ("\nReason: " + reason) : '')
+        );
+        if (isDef(factory.errorComp)) {
+          factory.error = true;
+          forceRender(true);
+        }
+      });
+
+      var res = factory(resolve, reject);
+
+      if (isObject(res)) {
+        if (isPromise(res)) {
+          // () => Promise
+          if (isUndef(factory.resolved)) {
+            res.then(resolve, reject);
+          }
+        } else if (isPromise(res.component)) {
+          res.component.then(resolve, reject);
+
+          if (isDef(res.error)) {
+            factory.errorComp = ensureCtor(res.error, baseCtor);
+          }
+
+          if (isDef(res.loading)) {
+            factory.loadingComp = ensureCtor(res.loading, baseCtor);
+            if (res.delay === 0) {
+              factory.loading = true;
+            } else {
+              timerLoading = setTimeout(function () {
+                timerLoading = null;
+                if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                  factory.loading = true;
+                  forceRender(false);
+                }
+              }, res.delay || 200);
+            }
+          }
+
+          if (isDef(res.timeout)) {
+            timerTimeout = setTimeout(function () {
+              timerTimeout = null;
+              if (isUndef(factory.resolved)) {
+                reject(
+                  "timeout (" + (res.timeout) + "ms)"
+                );
+              }
+            }, res.timeout);
+          }
+        }
+      }
+
+      sync = false;
+      // return in case resolved synchronously
+      return factory.loading
+        ? factory.loadingComp
+        : factory.resolved
+    }
+  }
+
+  /*  */
+
+  function getFirstComponentChild (children) {
+    if (Array.isArray(children)) {
+      for (var i = 0; i < children.length; i++) {
+        var c = children[i];
+        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+          return c
+        }
+      }
+    }
+  }
+
+  /*  */
+
+  /*  */
+
+  function initEvents (vm) {
+    vm._events = Object.create(null);
+    vm._hasHookEvent = false;
+    // init parent attached events
+    var listeners = vm.$options._parentListeners;
+    if (listeners) {
+      updateComponentListeners(vm, listeners);
+    }
+  }
+
+  var target;
+
+  function add (event, fn) {
+    target.$on(event, fn);
+  }
+
+  function remove$1 (event, fn) {
+    target.$off(event, fn);
+  }
+
+  function createOnceHandler (event, fn) {
+    var _target = target;
+    return function onceHandler () {
+      var res = fn.apply(null, arguments);
+      if (res !== null) {
+        _target.$off(event, onceHandler);
+      }
+    }
+  }
+
+  function updateComponentListeners (
+    vm,
+    listeners,
+    oldListeners
+  ) {
+    target = vm;
+    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+    target = undefined;
+  }
+
+  function eventsMixin (Vue) {
+    var hookRE = /^hook:/;
+    Vue.prototype.$on = function (event, fn) {
+      var vm = this;
+      if (Array.isArray(event)) {
+        for (var i = 0, l = event.length; i < l; i++) {
+          vm.$on(event[i], fn);
+        }
+      } else {
+        (vm._events[event] || (vm._events[event] = [])).push(fn);
+        // optimize hook:event cost by using a boolean flag marked at registration
+        // instead of a hash lookup
+        if (hookRE.test(event)) {
+          vm._hasHookEvent = true;
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$once = function (event, fn) {
+      var vm = this;
+      function on () {
+        vm.$off(event, on);
+        fn.apply(vm, arguments);
+      }
+      on.fn = fn;
+      vm.$on(event, on);
+      return vm
+    };
+
+    Vue.prototype.$off = function (event, fn) {
+      var vm = this;
+      // all
+      if (!arguments.length) {
+        vm._events = Object.create(null);
+        return vm
+      }
+      // array of events
+      if (Array.isArray(event)) {
+        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+          vm.$off(event[i$1], fn);
+        }
+        return vm
+      }
+      // specific event
+      var cbs = vm._events[event];
+      if (!cbs) {
+        return vm
+      }
+      if (!fn) {
+        vm._events[event] = null;
+        return vm
+      }
+      // specific handler
+      var cb;
+      var i = cbs.length;
+      while (i--) {
+        cb = cbs[i];
+        if (cb === fn || cb.fn === fn) {
+          cbs.splice(i, 1);
+          break
+        }
+      }
+      return vm
+    };
+
+    Vue.prototype.$emit = function (event) {
+      var vm = this;
+      {
+        var lowerCaseEvent = event.toLowerCase();
+        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+          tip(
+            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+            "Note that HTML attributes are case-insensitive and you cannot use " +
+            "v-on to listen to camelCase events when using in-DOM templates. " +
+            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+          );
+        }
+      }
+      var cbs = vm._events[event];
+      if (cbs) {
+        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+        var args = toArray(arguments, 1);
+        var info = "event handler for \"" + event + "\"";
+        for (var i = 0, l = cbs.length; i < l; i++) {
+          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+        }
+      }
+      return vm
+    };
+  }
+
+  /*  */
+
+  var activeInstance = null;
+  var isUpdatingChildComponent = false;
+
+  function setActiveInstance(vm) {
+    var prevActiveInstance = activeInstance;
+    activeInstance = vm;
+    return function () {
+      activeInstance = prevActiveInstance;
+    }
+  }
+
+  function initLifecycle (vm) {
+    var options = vm.$options;
+
+    // locate first non-abstract parent
+    var parent = options.parent;
+    if (parent && !options.abstract) {
+      while (parent.$options.abstract && parent.$parent) {
+        parent = parent.$parent;
+      }
+      parent.$children.push(vm);
+    }
+
+    vm.$parent = parent;
+    vm.$root = parent ? parent.$root : vm;
+
+    vm.$children = [];
+    vm.$refs = {};
+
+    vm._watcher = null;
+    vm._inactive = null;
+    vm._directInactive = false;
+    vm._isMounted = false;
+    vm._isDestroyed = false;
+    vm._isBeingDestroyed = false;
+  }
+
+  function lifecycleMixin (Vue) {
+    Vue.prototype._update = function (vnode, hydrating) {
+      var vm = this;
+      var prevEl = vm.$el;
+      var prevVnode = vm._vnode;
+      var restoreActiveInstance = setActiveInstance(vm);
+      vm._vnode = vnode;
+      // Vue.prototype.__patch__ is injected in entry points
+      // based on the rendering backend used.
+      if (!prevVnode) {
+        // initial render
+        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+      } else {
+        // updates
+        vm.$el = vm.__patch__(prevVnode, vnode);
+      }
+      restoreActiveInstance();
+      // update __vue__ reference
+      if (prevEl) {
+        prevEl.__vue__ = null;
+      }
+      if (vm.$el) {
+        vm.$el.__vue__ = vm;
+      }
+      // if parent is an HOC, update its $el as well
+      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+        vm.$parent.$el = vm.$el;
+      }
+      // updated hook is called by the scheduler to ensure that children are
+      // updated in a parent's updated hook.
+    };
+
+    Vue.prototype.$forceUpdate = function () {
+      var vm = this;
+      if (vm._watcher) {
+        vm._watcher.update();
+      }
+    };
+
+    Vue.prototype.$destroy = function () {
+      var vm = this;
+      if (vm._isBeingDestroyed) {
+        return
+      }
+      callHook(vm, 'beforeDestroy');
+      vm._isBeingDestroyed = true;
+      // remove self from parent
+      var parent = vm.$parent;
+      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+        remove(parent.$children, vm);
+      }
+      // teardown watchers
+      if (vm._watcher) {
+        vm._watcher.teardown();
+      }
+      var i = vm._watchers.length;
+      while (i--) {
+        vm._watchers[i].teardown();
+      }
+      // remove reference from data ob
+      // frozen object may not have observer.
+      if (vm._data.__ob__) {
+        vm._data.__ob__.vmCount--;
+      }
+      // call the last hook...
+      vm._isDestroyed = true;
+      // invoke destroy hooks on current rendered tree
+      vm.__patch__(vm._vnode, null);
+      // fire destroyed hook
+      callHook(vm, 'destroyed');
+      // turn off all instance listeners.
+      vm.$off();
+      // remove __vue__ reference
+      if (vm.$el) {
+        vm.$el.__vue__ = null;
+      }
+      // release circular reference (#6759)
+      if (vm.$vnode) {
+        vm.$vnode.parent = null;
+      }
+    };
+  }
+
+  function mountComponent (
+    vm,
+    el,
+    hydrating
+  ) {
+    vm.$el = el;
+    if (!vm.$options.render) {
+      vm.$options.render = createEmptyVNode;
+      {
+        /* istanbul ignore if */
+        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+          vm.$options.el || el) {
+          warn(
+            'You are using the runtime-only build of Vue where the template ' +
+            'compiler is not available. Either pre-compile the templates into ' +
+            'render functions, or use the compiler-included build.',
+            vm
+          );
+        } else {
+          warn(
+            'Failed to mount component: template or render function not defined.',
+            vm
+          );
+        }
+      }
+    }
+    callHook(vm, 'beforeMount');
+
+    var updateComponent;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      updateComponent = function () {
+        var name = vm._name;
+        var id = vm._uid;
+        var startTag = "vue-perf-start:" + id;
+        var endTag = "vue-perf-end:" + id;
+
+        mark(startTag);
+        var vnode = vm._render();
+        mark(endTag);
+        measure(("vue " + name + " render"), startTag, endTag);
+
+        mark(startTag);
+        vm._update(vnode, hydrating);
+        mark(endTag);
+        measure(("vue " + name + " patch"), startTag, endTag);
+      };
+    } else {
+      updateComponent = function () {
+        vm._update(vm._render(), hydrating);
+      };
+    }
+
+    // we set this to vm._watcher inside the watcher's constructor
+    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+    // component's mounted hook), which relies on vm._watcher being already defined
+    new Watcher(vm, updateComponent, noop, {
+      before: function before () {
+        if (vm._isMounted && !vm._isDestroyed) {
+          callHook(vm, 'beforeUpdate');
+        }
+      }
+    }, true /* isRenderWatcher */);
+    hydrating = false;
+
+    // manually mounted instance, call mounted on self
+    // mounted is called for render-created child components in its inserted hook
+    if (vm.$vnode == null) {
+      vm._isMounted = true;
+      callHook(vm, 'mounted');
+    }
+    return vm
+  }
+
+  function updateChildComponent (
+    vm,
+    propsData,
+    listeners,
+    parentVnode,
+    renderChildren
+  ) {
+    {
+      isUpdatingChildComponent = true;
+    }
+
+    // determine whether component has slot children
+    // we need to do this before overwriting $options._renderChildren.
+
+    // check if there are dynamic scopedSlots (hand-written or compiled but with
+    // dynamic slot names). Static scoped slots compiled from template has the
+    // "$stable" marker.
+    var newScopedSlots = parentVnode.data.scopedSlots;
+    var oldScopedSlots = vm.$scopedSlots;
+    var hasDynamicScopedSlot = !!(
+      (newScopedSlots && !newScopedSlots.$stable) ||
+      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+      (!newScopedSlots && vm.$scopedSlots.$key)
+    );
+
+    // Any static slot children from the parent may have changed during parent's
+    // update. Dynamic scoped slots may also have changed. In such cases, a forced
+    // update is necessary to ensure correctness.
+    var needsForceUpdate = !!(
+      renderChildren ||               // has new static slots
+      vm.$options._renderChildren ||  // has old static slots
+      hasDynamicScopedSlot
+    );
+
+    vm.$options._parentVnode = parentVnode;
+    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+    if (vm._vnode) { // update child tree's parent
+      vm._vnode.parent = parentVnode;
+    }
+    vm.$options._renderChildren = renderChildren;
+
+    // update $attrs and $listeners hash
+    // these are also reactive so they may trigger child update if the child
+    // used them during render
+    vm.$attrs = parentVnode.data.attrs || emptyObject;
+    vm.$listeners = listeners || emptyObject;
+
+    // update props
+    if (propsData && vm.$options.props) {
+      toggleObserving(false);
+      var props = vm._props;
+      var propKeys = vm.$options._propKeys || [];
+      for (var i = 0; i < propKeys.length; i++) {
+        var key = propKeys[i];
+        var propOptions = vm.$options.props; // wtf flow?
+        props[key] = validateProp(key, propOptions, propsData, vm);
+      }
+      toggleObserving(true);
+      // keep a copy of raw propsData
+      vm.$options.propsData = propsData;
+    }
+
+    // update listeners
+    listeners = listeners || emptyObject;
+    var oldListeners = vm.$options._parentListeners;
+    vm.$options._parentListeners = listeners;
+    updateComponentListeners(vm, listeners, oldListeners);
+
+    // resolve slots + force update if has children
+    if (needsForceUpdate) {
+      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+      vm.$forceUpdate();
+    }
+
+    {
+      isUpdatingChildComponent = false;
+    }
   }
-  // call factory function for non-Function types
-  // a value is Function if its prototype is function even across different execution context
-  return typeof def === 'function' && getType(prop.type) !== 'Function'
-    ? def.call(vm)
-    : def
-}
 
-/**
- * Assert whether a prop is valid.
- */
-function assertProp (
-  prop,
-  name,
-  value,
-  vm,
-  absent
-) {
-  if (prop.required && absent) {
-    warn(
-      'Missing required prop: "' + name + '"',
-      vm
-    );
-    return
-  }
-  if (value == null && !prop.required) {
-    return
+  function isInInactiveTree (vm) {
+    while (vm && (vm = vm.$parent)) {
+      if (vm._inactive) { return true }
+    }
+    return false
   }
-  var type = prop.type;
-  var valid = !type || type === true;
-  var expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
+
+  function activateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = false;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    } else if (vm._directInactive) {
+      return
     }
-    for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
+    if (vm._inactive || vm._inactive === null) {
+      vm._inactive = false;
+      for (var i = 0; i < vm.$children.length; i++) {
+        activateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'activated');
     }
   }
-  if (!valid) {
-    warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
-      vm
-    );
-    return
+
+  function deactivateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = true;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    }
+    if (!vm._inactive) {
+      vm._inactive = true;
+      for (var i = 0; i < vm.$children.length; i++) {
+        deactivateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'deactivated');
+    }
   }
-  var validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
+
+  function callHook (vm, hook) {
+    // #7573 disable dep collection when invoking lifecycle hooks
+    pushTarget();
+    var handlers = vm.$options[hook];
+    var info = hook + " hook";
+    if (handlers) {
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+      }
     }
+    if (vm._hasHookEvent) {
+      vm.$emit('hook:' + hook);
+    }
+    popTarget();
   }
-}
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+  /*  */
+
+  var MAX_UPDATE_COUNT = 100;
+
+  var queue = [];
+  var activatedChildren = [];
+  var has = {};
+  var circular = {};
+  var waiting = false;
+  var flushing = false;
+  var index = 0;
 
-function assertType (value, type) {
-  var valid;
-  var expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    var t = typeof value;
-    valid = t === expectedType.toLowerCase();
-    // for primitive wrapper objects
-    if (!valid && t === 'object') {
-      valid = value instanceof type;
+  /**
+   * Reset the scheduler's state.
+   */
+  function resetSchedulerState () {
+    index = queue.length = activatedChildren.length = 0;
+    has = {};
+    {
+      circular = {};
     }
-  } else if (expectedType === 'Object') {
-    valid = isPlainObject(value);
-  } else if (expectedType === 'Array') {
-    valid = Array.isArray(value);
-  } else {
-    valid = value instanceof type;
-  }
-  return {
-    valid: valid,
-    expectedType: expectedType
+    waiting = flushing = false;
   }
-}
 
-/**
- * Use function string name to check built-in types,
- * because a simple equality check will fail when running
- * across different vms / iframes.
- */
-function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
-  return match ? match[1] : ''
-}
+  // Async edge case #6566 requires saving the timestamp when event listeners are
+  // attached. However, calling performance.now() has a perf overhead especially
+  // if the page has thousands of event listeners. Instead, we take a timestamp
+  // every time the scheduler flushes and use that for all event listeners
+  // attached during that flush.
+  var currentFlushTimestamp = 0;
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
-  }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  // Async edge case fix requires storing an event listener's attach timestamp.
+  var getNow = Date.now;
+
+  // Determine what event timestamp the browser is using. Annoyingly, the
+  // timestamp can either be hi-res (relative to page load) or low-res
+  // (relative to UNIX epoch), so in order to compare time we have to use the
+  // same timestamp type when saving the flush timestamp.
+  // All IE versions use low-res event timestamps, and have problematic clock
+  // implementations (#9632)
+  if (inBrowser && !isIE) {
+    var performance = window.performance;
+    if (
+      performance &&
+      typeof performance.now === 'function' &&
+      getNow() > document.createEvent('Event').timeStamp
+    ) {
+      // if the event timestamp, although evaluated AFTER the Date.now(), is
+      // smaller than it, it means the event is using a hi-res timestamp,
+      // and we need to use the hi-res version for event listener timestamps as
+      // well.
+      getNow = function () { return performance.now(); };
     }
   }
-  /* istanbul ignore next */
-  return false
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
+
+  /**
+   * Flush both queues and run the watchers.
+   */
+  function flushSchedulerQueue () {
+    currentFlushTimestamp = getNow();
+    flushing = true;
+    var watcher, id;
+
+    // Sort queue before flush.
+    // This ensures that:
+    // 1. Components are updated from parent to child. (because parent is always
+    //    created before the child)
+    // 2. A component's user watchers are run before its render watcher (because
+    //    user watchers are created before the render watcher)
+    // 3. If a component is destroyed during a parent component's watcher run,
+    //    its watchers can be skipped.
+    queue.sort(function (a, b) { return a.id - b.id; });
+
+    // do not cache length because more watchers might be pushed
+    // as we run existing watchers
+    for (index = 0; index < queue.length; index++) {
+      watcher = queue[index];
+      if (watcher.before) {
+        watcher.before();
+      }
+      id = watcher.id;
+      has[id] = null;
+      watcher.run();
+      // in dev build, check and stop circular updates.
+      if (has[id] != null) {
+        circular[id] = (circular[id] || 0) + 1;
+        if (circular[id] > MAX_UPDATE_COUNT) {
+          warn(
+            'You may have an infinite update loop ' + (
+              watcher.user
+                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+                : "in a component render function."
+            ),
+            watcher.vm
+          );
+          break
         }
       }
     }
+
+    // keep copies of post queues before resetting state
+    var activatedQueue = activatedChildren.slice();
+    var updatedQueue = queue.slice();
+
+    resetSchedulerState();
+
+    // call component updated and activated hooks
+    callActivatedHooks(activatedQueue);
+    callUpdatedHooks(updatedQueue);
+
+    // devtool hook
+    /* istanbul ignore if */
+    if (devtools && config.devtools) {
+      devtools.emit('flush');
+    }
   }
-  globalHandleError(err, vm, info);
-}
 
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
+  function callUpdatedHooks (queue) {
+    var i = queue.length;
+    while (i--) {
+      var watcher = queue[i];
+      var vm = watcher.vm;
+      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'updated');
+      }
     }
   }
-  logError(err, vm, info);
-}
 
-function logError (err, vm, info) {
-  {
-    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  /**
+   * Queue a kept-alive component that was activated during patch.
+   * The queue will be processed after the entire tree has been patched.
+   */
+  function queueActivatedComponent (vm) {
+    // setting _inactive to false here so that a render function can
+    // rely on checking whether it's in an inactive tree (e.g. router-view)
+    vm._inactive = false;
+    activatedChildren.push(vm);
   }
-  /* istanbul ignore else */
-  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
-    console.error(err);
-  } else {
-    throw err
-  }
-}
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-var pending = false;
-
-function flushCallbacks () {
-  pending = false;
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  var p = Promise.resolve();
-  microTimerFunc = function () {
-    p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
-    // it can get stuck in a weird state where callbacks are pushed into the
-    // microtask queue but the queue isn't being flushed, until the browser
-    // needs to do some other work, e.g. handle a timer. Therefore we can
-    // "force" the microtask queue to be flushed by adding an empty timer.
-    if (isIOS) { setTimeout(noop); }
-  };
-} else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
-}
 
-function nextTick (cb, ctx) {
-  var _resolve;
-  callbacks.push(function () {
-    if (cb) {
-      try {
-        cb.call(ctx);
-      } catch (e) {
-        handleError(e, ctx, 'nextTick');
-      }
-    } else if (_resolve) {
-      _resolve(ctx);
-    }
-  });
-  if (!pending) {
-    pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
+  function callActivatedHooks (queue) {
+    for (var i = 0; i < queue.length; i++) {
+      queue[i]._inactive = true;
+      activateChildComponent(queue[i], true /* true */);
     }
   }
-  // $flow-disable-line
-  if (!cb && typeof Promise !== 'undefined') {
-    return new Promise(function (resolve) {
-      _resolve = resolve;
-    })
+
+  /**
+   * Push a watcher into the watcher queue.
+   * Jobs with duplicate IDs will be skipped unless it's
+   * pushed when the queue is being flushed.
+   */
+  function queueWatcher (watcher) {
+    var id = watcher.id;
+    if (has[id] == null) {
+      has[id] = true;
+      if (!flushing) {
+        queue.push(watcher);
+      } else {
+        // if already flushing, splice the watcher based on its id
+        // if already past its id, it will be run next immediately.
+        var i = queue.length - 1;
+        while (i > index && queue[i].id > watcher.id) {
+          i--;
+        }
+        queue.splice(i + 1, 0, watcher);
+      }
+      // queue the flush
+      if (!waiting) {
+        waiting = true;
+
+        if (!config.async) {
+          flushSchedulerQueue();
+          return
+        }
+        nextTick(flushSchedulerQueue);
+      }
+    }
   }
-}
 
-/*  */
+  /*  */
 
-var mark;
-var measure;
 
-{
-  var perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    mark = function (tag) { return perf.mark(tag); };
-    measure = function (name, startTag, endTag) {
-      perf.measure(name, startTag, endTag);
-      perf.clearMarks(startTag);
-      perf.clearMarks(endTag);
-      perf.clearMeasures(name);
-    };
-  }
-}
 
-/* not type checking this file because flow doesn't play well with Proxy */
+  var uid$2 = 0;
 
-var initProxy;
+  /**
+   * A watcher parses an expression, collects dependencies,
+   * and fires callback when the expression value changes.
+   * This is used for both the $watch() api and directives.
+   */
+  var Watcher = function Watcher (
+    vm,
+    expOrFn,
+    cb,
+    options,
+    isRenderWatcher
+  ) {
+    this.vm = vm;
+    if (isRenderWatcher) {
+      vm._watcher = this;
+    }
+    vm._watchers.push(this);
+    // options
+    if (options) {
+      this.deep = !!options.deep;
+      this.user = !!options.user;
+      this.lazy = !!options.lazy;
+      this.sync = !!options.sync;
+      this.before = options.before;
+    } else {
+      this.deep = this.user = this.lazy = this.sync = false;
+    }
+    this.cb = cb;
+    this.id = ++uid$2; // uid for batching
+    this.active = true;
+    this.dirty = this.lazy; // for lazy watchers
+    this.deps = [];
+    this.newDeps = [];
+    this.depIds = new _Set();
+    this.newDepIds = new _Set();
+    this.expression = expOrFn.toString();
+    // parse expression for getter
+    if (typeof expOrFn === 'function') {
+      this.getter = expOrFn;
+    } else {
+      this.getter = parsePath(expOrFn);
+      if (!this.getter) {
+        this.getter = noop;
+        warn(
+          "Failed watching path: \"" + expOrFn + "\" " +
+          'Watcher only accepts simple dot-delimited paths. ' +
+          'For full control, use a function instead.',
+          vm
+        );
+      }
+    }
+    this.value = this.lazy
+      ? undefined
+      : this.get();
+  };
 
-{
-  var allowedGlobals = makeMap(
-    'Infinity,undefined,NaN,isFinite,isNaN,' +
-    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-    'require' // for Webpack/Browserify
-  );
+  /**
+   * Evaluate the getter, and re-collect dependencies.
+   */
+  Watcher.prototype.get = function get () {
+    pushTarget(this);
+    var value;
+    var vm = this.vm;
+    try {
+      value = this.getter.call(vm, vm);
+    } catch (e) {
+      if (this.user) {
+        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+      } else {
+        throw e
+      }
+    } finally {
+      // "touch" every property so they are all tracked as
+      // dependencies for deep watching
+      if (this.deep) {
+        traverse(value);
+      }
+      popTarget();
+      this.cleanupDeps();
+    }
+    return value
+  };
 
-  var warnNonPresent = function (target, key) {
-    warn(
-      "Property or method \"" + key + "\" is not defined on the instance but " +
-      'referenced during render. Make sure that this property is reactive, ' +
-      'either in the data option, or for class-based components, by ' +
-      'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
-      target
-    );
+  /**
+   * Add a dependency to this directive.
+   */
+  Watcher.prototype.addDep = function addDep (dep) {
+    var id = dep.id;
+    if (!this.newDepIds.has(id)) {
+      this.newDepIds.add(id);
+      this.newDeps.push(dep);
+      if (!this.depIds.has(id)) {
+        dep.addSub(this);
+      }
+    }
   };
 
-  var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+  /**
+   * Clean up for dependency collection.
+   */
+  Watcher.prototype.cleanupDeps = function cleanupDeps () {
+    var i = this.deps.length;
+    while (i--) {
+      var dep = this.deps[i];
+      if (!this.newDepIds.has(dep.id)) {
+        dep.removeSub(this);
+      }
+    }
+    var tmp = this.depIds;
+    this.depIds = this.newDepIds;
+    this.newDepIds = tmp;
+    this.newDepIds.clear();
+    tmp = this.deps;
+    this.deps = this.newDeps;
+    this.newDeps = tmp;
+    this.newDeps.length = 0;
+  };
 
-  if (hasProxy) {
-    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      set: function set (target, key, value) {
-        if (isBuiltInModifier(key)) {
-          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-          return false
+  /**
+   * Subscriber interface.
+   * Will be called when a dependency changes.
+   */
+  Watcher.prototype.update = function update () {
+    /* istanbul ignore else */
+    if (this.lazy) {
+      this.dirty = true;
+    } else if (this.sync) {
+      this.run();
+    } else {
+      queueWatcher(this);
+    }
+  };
+
+  /**
+   * Scheduler job interface.
+   * Will be called by the scheduler.
+   */
+  Watcher.prototype.run = function run () {
+    if (this.active) {
+      var value = this.get();
+      if (
+        value !== this.value ||
+        // Deep watchers and watchers on Object/Arrays should fire even
+        // when the value is the same, because the value may
+        // have mutated.
+        isObject(value) ||
+        this.deep
+      ) {
+        // set new value
+        var oldValue = this.value;
+        this.value = value;
+        if (this.user) {
+          var info = "callback for watcher \"" + (this.expression) + "\"";
+          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
         } else {
-          target[key] = value;
-          return true
+          this.cb.call(this.vm, value, oldValue);
         }
       }
-    });
-  }
-
-  var hasHandler = {
-    has: function has (target, key) {
-      var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
-      if (!has && !isAllowed) {
-        warnNonPresent(target, key);
-      }
-      return has || !isAllowed
     }
   };
 
-  var getHandler = {
-    get: function get (target, key) {
-      if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
-      }
-      return target[key]
+  /**
+   * Evaluate the value of the watcher.
+   * This only gets called for lazy watchers.
+   */
+  Watcher.prototype.evaluate = function evaluate () {
+    this.value = this.get();
+    this.dirty = false;
+  };
+
+  /**
+   * Depend on all deps collected by this watcher.
+   */
+  Watcher.prototype.depend = function depend () {
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].depend();
     }
   };
 
-  initProxy = function initProxy (vm) {
-    if (hasProxy) {
-      // determine which proxy handler to use
-      var options = vm.$options;
-      var handlers = options.render && options.render._withStripped
-        ? getHandler
-        : hasHandler;
-      vm._renderProxy = new Proxy(vm, handlers);
-    } else {
-      vm._renderProxy = vm;
+  /**
+   * Remove self from all dependencies' subscriber list.
+   */
+  Watcher.prototype.teardown = function teardown () {
+    if (this.active) {
+      // remove self from vm's watcher list
+      // this is a somewhat expensive operation so we skip it
+      // if the vm is being destroyed.
+      if (!this.vm._isBeingDestroyed) {
+        remove(this.vm._watchers, this);
+      }
+      var i = this.deps.length;
+      while (i--) {
+        this.deps[i].removeSub(this);
+      }
+      this.active = false;
     }
   };
-}
 
-/*  */
+  /*  */
 
-var seenObjects = new _Set();
+  var sharedPropertyDefinition = {
+    enumerable: true,
+    configurable: true,
+    get: noop,
+    set: noop
+  };
 
-/**
- * Recursively traverse an object to evoke all converted
- * getters, so that every nested property inside the object
- * is collected as a "deep" dependency.
- */
-function traverse (val) {
-  _traverse(val, seenObjects);
-  seenObjects.clear();
-}
-
-function _traverse (val, seen) {
-  var i, keys;
-  var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
-    return
-  }
-  if (val.__ob__) {
-    var depId = val.__ob__.dep.id;
-    if (seen.has(depId)) {
-      return
+  function proxy (target, sourceKey, key) {
+    sharedPropertyDefinition.get = function proxyGetter () {
+      return this[sourceKey][key]
+    };
+    sharedPropertyDefinition.set = function proxySetter (val) {
+      this[sourceKey][key] = val;
+    };
+    Object.defineProperty(target, key, sharedPropertyDefinition);
+  }
+
+  function initState (vm) {
+    vm._watchers = [];
+    var opts = vm.$options;
+    if (opts.props) { initProps(vm, opts.props); }
+    if (opts.methods) { initMethods(vm, opts.methods); }
+    if (opts.data) {
+      initData(vm);
+    } else {
+      observe(vm._data = {}, true /* asRootData */);
+    }
+    if (opts.computed) { initComputed(vm, opts.computed); }
+    if (opts.watch && opts.watch !== nativeWatch) {
+      initWatch(vm, opts.watch);
     }
-    seen.add(depId);
   }
-  if (isA) {
-    i = val.length;
-    while (i--) { _traverse(val[i], seen); }
-  } else {
-    keys = Object.keys(val);
-    i = keys.length;
-    while (i--) { _traverse(val[keys[i]], seen); }
-  }
-}
-
-/*  */
-
-var normalizeEvent = cached(function (name) {
-  var passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  var capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name: name,
-    once: once$$1,
-    capture: capture,
-    passive: passive
-  }
-});
-
-function createFnInvoker (fns) {
-  function invoker () {
-    var arguments$1 = arguments;
-
-    var fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      var cloned = fns.slice();
-      for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+
+  function initProps (vm, propsOptions) {
+    var propsData = vm.$options.propsData || {};
+    var props = vm._props = {};
+    // cache prop keys so that future props updates can iterate using Array
+    // instead of dynamic object key enumeration.
+    var keys = vm.$options._propKeys = [];
+    var isRoot = !vm.$parent;
+    // root instance props should be converted
+    if (!isRoot) {
+      toggleObserving(false);
+    }
+    var loop = function ( key ) {
+      keys.push(key);
+      var value = validateProp(key, propsOptions, propsData, vm);
+      /* istanbul ignore else */
+      {
+        var hyphenatedKey = hyphenate(key);
+        if (isReservedAttribute(hyphenatedKey) ||
+            config.isReservedAttr(hyphenatedKey)) {
+          warn(
+            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+            vm
+          );
+        }
+        defineReactive$$1(props, key, value, function () {
+          if (!isRoot && !isUpdatingChildComponent) {
+            warn(
+              "Avoid mutating a prop directly since the value will be " +
+              "overwritten whenever the parent component re-renders. " +
+              "Instead, use a data or computed property based on the prop's " +
+              "value. Prop being mutated: \"" + key + "\"",
+              vm
+            );
+          }
+        });
       }
-    } else {
-      // return handler return value for single handlers
-      return fns.apply(null, arguments)
-    }
-  }
-  invoker.fns = fns;
-  return invoker
-}
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, def, cur, old, event;
-  for (name in on) {
-    def = cur = on[name];
-    old = oldOn[name];
-    event = normalizeEvent(name);
-    /* istanbul ignore if */
-    if (isUndef(cur)) {
-      "development" !== 'production' && warn(
-        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+      // static props are already proxied on the component's prototype
+      // during Vue.extend(). We only need to proxy props defined at
+      // instantiation here.
+      if (!(key in vm)) {
+        proxy(vm, "_props", key);
+      }
+    };
+
+    for (var key in propsOptions) loop( key );
+    toggleObserving(true);
+  }
+
+  function initData (vm) {
+    var data = vm.$options.data;
+    data = vm._data = typeof data === 'function'
+      ? getData(data, vm)
+      : data || {};
+    if (!isPlainObject(data)) {
+      data = {};
+      warn(
+        'data functions should return an object:\n' +
+        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
         vm
       );
-    } else if (isUndef(old)) {
-      if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+    }
+    // proxy data on instance
+    var keys = Object.keys(data);
+    var props = vm.$options.props;
+    var methods = vm.$options.methods;
+    var i = keys.length;
+    while (i--) {
+      var key = keys[i];
+      {
+        if (methods && hasOwn(methods, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a data property."),
+            vm
+          );
+        }
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          "The data property \"" + key + "\" is already declared as a prop. " +
+          "Use prop default value instead.",
+          vm
+        );
+      } else if (!isReserved(key)) {
+        proxy(vm, "_data", key);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
-    } else if (cur !== old) {
-      old.fns = cur;
-      on[name] = old;
     }
+    // observe data
+    observe(data, true /* asRootData */);
   }
-  for (name in oldOn) {
-    if (isUndef(on[name])) {
-      event = normalizeEvent(name);
-      remove$$1(event.name, oldOn[name], event.capture);
+
+  function getData (data, vm) {
+    // #7573 disable dep collection when invoking data getters
+    pushTarget();
+    try {
+      return data.call(vm, vm)
+    } catch (e) {
+      handleError(e, vm, "data()");
+      return {}
+    } finally {
+      popTarget();
     }
   }
-}
 
-/*  */
+  var computedWatcherOptions = { lazy: true };
 
-function mergeVNodeHook (def, hookKey, hook) {
-  if (def instanceof VNode) {
-    def = def.data.hook || (def.data.hook = {});
-  }
-  var invoker;
-  var oldHook = def[hookKey];
+  function initComputed (vm, computed) {
+    // $flow-disable-line
+    var watchers = vm._computedWatchers = Object.create(null);
+    // computed properties are just getters during SSR
+    var isSSR = isServerRendering();
+
+    for (var key in computed) {
+      var userDef = computed[key];
+      var getter = typeof userDef === 'function' ? userDef : userDef.get;
+      if (getter == null) {
+        warn(
+          ("Getter is missing for computed property \"" + key + "\"."),
+          vm
+        );
+      }
+
+      if (!isSSR) {
+        // create internal watcher for the computed property.
+        watchers[key] = new Watcher(
+          vm,
+          getter || noop,
+          noop,
+          computedWatcherOptions
+        );
+      }
 
-  function wrappedHook () {
-    hook.apply(this, arguments);
-    // important: remove merged hook to ensure it's called only once
-    // and prevent memory leak
-    remove(invoker.fns, wrappedHook);
+      // component-defined computed properties are already defined on the
+      // component prototype. We only need to define computed properties defined
+      // at instantiation here.
+      if (!(key in vm)) {
+        defineComputed(vm, key, userDef);
+      } else {
+        if (key in vm.$data) {
+          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+        } else if (vm.$options.props && key in vm.$options.props) {
+          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+        } else if (vm.$options.methods && key in vm.$options.methods) {
+          warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+        }
+      }
+    }
   }
 
-  if (isUndef(oldHook)) {
-    // no existing hook
-    invoker = createFnInvoker([wrappedHook]);
-  } else {
-    /* istanbul ignore if */
-    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
-      // already a merged invoker
-      invoker = oldHook;
-      invoker.fns.push(wrappedHook);
+  function defineComputed (
+    target,
+    key,
+    userDef
+  ) {
+    var shouldCache = !isServerRendering();
+    if (typeof userDef === 'function') {
+      sharedPropertyDefinition.get = shouldCache
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef);
+      sharedPropertyDefinition.set = noop;
     } else {
-      // existing plain hook
-      invoker = createFnInvoker([oldHook, wrappedHook]);
-    }
-  }
-
-  invoker.merged = true;
-  def[hookKey] = invoker;
-}
-
-/*  */
-
-function extractPropsFromVNodeData (
-  data,
-  Ctor,
-  tag
-) {
-  // we are only extracting raw values here.
-  // validation and default values are handled in the child
-  // component itself.
-  var propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
-  }
-  var res = {};
-  var attrs = data.attrs;
-  var props = data.props;
-  if (isDef(attrs) || isDef(props)) {
-    for (var key in propOptions) {
-      var altKey = hyphenate(key);
-      {
-        var keyInLowerCase = key.toLowerCase();
-        if (
-          key !== keyInLowerCase &&
-          attrs && hasOwn(attrs, keyInLowerCase)
-        ) {
-          tip(
-            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-            " \"" + key + "\". " +
-            "Note that HTML attributes are case-insensitive and camelCased " +
-            "props need to use their kebab-case equivalents when using in-DOM " +
-            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+      sharedPropertyDefinition.get = userDef.get
+        ? shouldCache && userDef.cache !== false
+          ? createComputedGetter(key)
+          : createGetterInvoker(userDef.get)
+        : noop;
+      sharedPropertyDefinition.set = userDef.set || noop;
+    }
+    if (sharedPropertyDefinition.set === noop) {
+      sharedPropertyDefinition.set = function () {
+        warn(
+          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+          this
+        );
+      };
+    }
+    Object.defineProperty(target, key, sharedPropertyDefinition);
+  }
+
+  function createComputedGetter (key) {
+    return function computedGetter () {
+      var watcher = this._computedWatchers && this._computedWatchers[key];
+      if (watcher) {
+        if (watcher.dirty) {
+          watcher.evaluate();
+        }
+        if (Dep.target) {
+          watcher.depend();
+        }
+        return watcher.value
+      }
+    }
+  }
+
+  function createGetterInvoker(fn) {
+    return function computedGetter () {
+      return fn.call(this, this)
+    }
+  }
+
+  function initMethods (vm, methods) {
+    var props = vm.$options.props;
+    for (var key in methods) {
+      {
+        if (typeof methods[key] !== 'function') {
+          warn(
+            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+            "Did you reference the function correctly?",
+            vm
+          );
+        }
+        if (props && hasOwn(props, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a prop."),
+            vm
+          );
+        }
+        if ((key in vm) && isReserved(key)) {
+          warn(
+            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+            "Avoid defining component methods that start with _ or $."
           );
         }
       }
-      checkProp(res, props, key, altKey, true) ||
-      checkProp(res, attrs, key, altKey, false);
+      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
     }
   }
-  return res
-}
 
-function checkProp (
-  res,
-  hash,
-  key,
-  altKey,
-  preserve
-) {
-  if (isDef(hash)) {
-    if (hasOwn(hash, key)) {
-      res[key] = hash[key];
-      if (!preserve) {
-        delete hash[key];
-      }
-      return true
-    } else if (hasOwn(hash, altKey)) {
-      res[key] = hash[altKey];
-      if (!preserve) {
-        delete hash[altKey];
+  function initWatch (vm, watch) {
+    for (var key in watch) {
+      var handler = watch[key];
+      if (Array.isArray(handler)) {
+        for (var i = 0; i < handler.length; i++) {
+          createWatcher(vm, key, handler[i]);
+        }
+      } else {
+        createWatcher(vm, key, handler);
       }
-      return true
     }
   }
-  return false
-}
-
-/*  */
-
-// The template compiler attempts to minimize the need for normalization by
-// statically analyzing the template at compile time.
-//
-// For plain HTML markup, normalization can be completely skipped because the
-// generated render function is guaranteed to return Array<VNode>. There are
-// two cases where extra normalization is needed:
-
-// 1. When the children contains components - because a functional component
-// may return an Array instead of a single root. In this case, just a simple
-// normalization is needed - if any child is an Array, we flatten the whole
-// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-// because functional components already normalize their own children.
-function simpleNormalizeChildren (children) {
-  for (var i = 0; i < children.length; i++) {
-    if (Array.isArray(children[i])) {
-      return Array.prototype.concat.apply([], children)
-    }
-  }
-  return children
-}
-
-// 2. When the children contains constructs that always generated nested Arrays,
-// e.g. <template>, <slot>, v-for, or when the children is provided by user
-// with hand-written render functions / JSX. In such cases a full normalization
-// is needed to cater to all possible types of children values.
-function normalizeChildren (children) {
-  return isPrimitive(children)
-    ? [createTextVNode(children)]
-    : Array.isArray(children)
-      ? normalizeArrayChildren(children)
-      : undefined
-}
-
-function isTextNode (node) {
-  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
-}
-
-function normalizeArrayChildren (children, nestedIndex) {
-  var res = [];
-  var i, c, lastIndex, last;
-  for (i = 0; i < children.length; i++) {
-    c = children[i];
-    if (isUndef(c) || typeof c === 'boolean') { continue }
-    lastIndex = res.length - 1;
-    last = res[lastIndex];
-    //  nested
-    if (Array.isArray(c)) {
-      if (c.length > 0) {
-        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-        // merge adjacent text nodes
-        if (isTextNode(c[0]) && isTextNode(last)) {
-          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-          c.shift();
-        }
-        res.push.apply(res, c);
-      }
-    } else if (isPrimitive(c)) {
-      if (isTextNode(last)) {
-        // merge adjacent text nodes
-        // this is necessary for SSR hydration because text nodes are
-        // essentially merged when rendered to HTML strings
-        res[lastIndex] = createTextVNode(last.text + c);
-      } else if (c !== '') {
-        // convert primitive to vnode
-        res.push(createTextVNode(c));
-      }
-    } else {
-      if (isTextNode(c) && isTextNode(last)) {
-        // merge adjacent text nodes
-        res[lastIndex] = createTextVNode(last.text + c.text);
-      } else {
-        // default key for nested array children (likely generated by v-for)
-        if (isTrue(children._isVList) &&
-          isDef(c.tag) &&
-          isUndef(c.key) &&
-          isDef(nestedIndex)) {
-          c.key = "__vlist" + nestedIndex + "_" + i + "__";
-        }
-        res.push(c);
-      }
+
+  function createWatcher (
+    vm,
+    expOrFn,
+    handler,
+    options
+  ) {
+    if (isPlainObject(handler)) {
+      options = handler;
+      handler = handler.handler;
+    }
+    if (typeof handler === 'string') {
+      handler = vm[handler];
     }
+    return vm.$watch(expOrFn, handler, options)
   }
-  return res
-}
 
-/*  */
+  function stateMixin (Vue) {
+    // flow somehow has problems with directly declared definition object
+    // when using Object.defineProperty, so we have to procedurally build up
+    // the object here.
+    var dataDef = {};
+    dataDef.get = function () { return this._data };
+    var propsDef = {};
+    propsDef.get = function () { return this._props };
+    {
+      dataDef.set = function () {
+        warn(
+          'Avoid replacing instance root $data. ' +
+          'Use nested data properties instead.',
+          this
+        );
+      };
+      propsDef.set = function () {
+        warn("$props is readonly.", this);
+      };
+    }
+    Object.defineProperty(Vue.prototype, '$data', dataDef);
+    Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
+    Vue.prototype.$set = set;
+    Vue.prototype.$delete = del;
 
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
+    Vue.prototype.$watch = function (
+      expOrFn,
+      cb,
+      options
+    ) {
+      var vm = this;
+      if (isPlainObject(cb)) {
+        return createWatcher(vm, expOrFn, cb, options)
+      }
+      options = options || {};
+      options.user = true;
+      var watcher = new Watcher(vm, expOrFn, cb, options);
+      if (options.immediate) {
+        var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+        pushTarget();
+        invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+        popTarget();
+      }
+      return function unwatchFn () {
+        watcher.teardown();
       }
     };
+  }
 
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
+  /*  */
 
-    var reject = once(function (reason) {
-      "development" !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
+  var uid$3 = 0;
+
+  function initMixin (Vue) {
+    Vue.prototype._init = function (options) {
+      var vm = this;
+      // a uid
+      vm._uid = uid$3++;
+
+      var startTag, endTag;
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        startTag = "vue-perf-start:" + (vm._uid);
+        endTag = "vue-perf-end:" + (vm._uid);
+        mark(startTag);
+      }
+
+      // a flag to avoid this being observed
+      vm._isVue = true;
+      // merge options
+      if (options && options._isComponent) {
+        // optimize internal component instantiation
+        // since dynamic options merging is pretty slow, and none of the
+        // internal component options needs special treatment.
+        initInternalComponent(vm, options);
+      } else {
+        vm.$options = mergeOptions(
+          resolveConstructorOptions(vm.constructor),
+          options || {},
+          vm
+        );
       }
-    });
+      /* istanbul ignore else */
+      {
+        initProxy(vm);
+      }
+      // expose real self
+      vm._self = vm;
+      initLifecycle(vm);
+      initEvents(vm);
+      initRender(vm);
+      callHook(vm, 'beforeCreate');
+      initInjections(vm); // resolve injections before data/props
+      initState(vm);
+      initProvide(vm); // resolve provide after data/props
+      callHook(vm, 'created');
 
-    var res = factory(resolve, reject);
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        vm._name = formatComponentName(vm, false);
+        mark(endTag);
+        measure(("vue " + (vm._name) + " init"), startTag, endTag);
+      }
 
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
+      if (vm.$options.el) {
+        vm.$mount(vm.$options.el);
+      }
+    };
+  }
 
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
+  function initInternalComponent (vm, options) {
+    var opts = vm.$options = Object.create(vm.constructor.options);
+    // doing this because it's faster than dynamic enumeration.
+    var parentVnode = options._parentVnode;
+    opts.parent = options.parent;
+    opts._parentVnode = parentVnode;
+
+    var vnodeComponentOptions = parentVnode.componentOptions;
+    opts.propsData = vnodeComponentOptions.propsData;
+    opts._parentListeners = vnodeComponentOptions.listeners;
+    opts._renderChildren = vnodeComponentOptions.children;
+    opts._componentTag = vnodeComponentOptions.tag;
+
+    if (options.render) {
+      opts.render = options.render;
+      opts.staticRenderFns = options.staticRenderFns;
+    }
+  }
+
+  function resolveConstructorOptions (Ctor) {
+    var options = Ctor.options;
+    if (Ctor.super) {
+      var superOptions = resolveConstructorOptions(Ctor.super);
+      var cachedSuperOptions = Ctor.superOptions;
+      if (superOptions !== cachedSuperOptions) {
+        // super option changed,
+        // need to resolve new options.
+        Ctor.superOptions = superOptions;
+        // check if there are any late-modified/attached options (#4976)
+        var modifiedOptions = resolveModifiedOptions(Ctor);
+        // update base extend options
+        if (modifiedOptions) {
+          extend(Ctor.extendOptions, modifiedOptions);
         }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
+        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+        if (options.name) {
+          options.components[options.name] = Ctor;
         }
+      }
+    }
+    return options
+  }
 
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                "timeout (" + (res.timeout) + "ms)"
-              );
-            }
-          }, res.timeout);
-        }
+  function resolveModifiedOptions (Ctor) {
+    var modified;
+    var latest = Ctor.options;
+    var sealed = Ctor.sealedOptions;
+    for (var key in latest) {
+      if (latest[key] !== sealed[key]) {
+        if (!modified) { modified = {}; }
+        modified[key] = latest[key];
       }
     }
+    return modified
+  }
 
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
+  function Vue (options) {
+    if (!(this instanceof Vue)
+    ) {
+      warn('Vue is a constructor and should be called with the `new` keyword');
+    }
+    this._init(options);
   }
-}
 
-/*  */
+  initMixin(Vue);
+  stateMixin(Vue);
+  eventsMixin(Vue);
+  lifecycleMixin(Vue);
+  renderMixin(Vue);
 
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
+  /*  */
 
-/*  */
+  function initUse (Vue) {
+    Vue.use = function (plugin) {
+      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+      if (installedPlugins.indexOf(plugin) > -1) {
+        return this
+      }
 
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
+      // additional parameters
+      var args = toArray(arguments, 1);
+      args.unshift(this);
+      if (typeof plugin.install === 'function') {
+        plugin.install.apply(plugin, args);
+      } else if (typeof plugin === 'function') {
+        plugin.apply(null, args);
       }
-    }
+      installedPlugins.push(plugin);
+      return this
+    };
   }
-}
 
-/*  */
+  /*  */
 
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
+  function initMixin$1 (Vue) {
+    Vue.mixin = function (mixin) {
+      this.options = mergeOptions(this.options, mixin);
+      return this
+    };
   }
-}
 
-var target;
+  /*  */
 
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
+  function initExtend (Vue) {
+    /**
+     * Each instance constructor, including Vue, has a unique
+     * cid. This enables us to create wrapped "child
+     * constructors" for prototypal inheritance and cache them.
+     */
+    Vue.cid = 0;
+    var cid = 1;
 
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
+    /**
+     * Class inheritance
+     */
+    Vue.extend = function (extendOptions) {
+      extendOptions = extendOptions || {};
+      var Super = this;
+      var SuperId = Super.cid;
+      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+      if (cachedCtors[SuperId]) {
+        return cachedCtors[SuperId]
       }
-    }
-    return vm
-  };
 
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
+      var name = extendOptions.name || Super.options.name;
+      if (name) {
+        validateComponentName(name);
       }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
 
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
+      var Sub = function VueComponent (options) {
+        this._init(options);
+      };
+      Sub.prototype = Object.create(Super.prototype);
+      Sub.prototype.constructor = Sub;
+      Sub.cid = cid++;
+      Sub.options = mergeOptions(
+        Super.options,
+        extendOptions
+      );
+      Sub['super'] = Super;
+
+      // For props and computed properties, we define the proxy getters on
+      // the Vue instances at extension time, on the extended prototype. This
+      // avoids Object.defineProperty calls for each instance created.
+      if (Sub.options.props) {
+        initProps$1(Sub);
       }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
+      if (Sub.options.computed) {
+        initComputed$1(Sub);
       }
-    }
-    return vm
-  };
-}
 
-/*  */
+      // allow further extension/mixin/plugin usage
+      Sub.extend = Super.extend;
+      Sub.mixin = Super.mixin;
+      Sub.use = Super.use;
 
+      // create asset registers, so extended classes
+      // can have their private assets too.
+      ASSET_TYPES.forEach(function (type) {
+        Sub[type] = Super[type];
+      });
+      // enable recursive self-lookup
+      if (name) {
+        Sub.options.components[name] = Sub;
+      }
 
+      // keep a reference to the super options at extension time.
+      // later at instantiation we can check if Super's options have
+      // been updated.
+      Sub.superOptions = Super.options;
+      Sub.extendOptions = extendOptions;
+      Sub.sealedOptions = extend({}, Sub.options);
 
-/**
- * Runtime helper for resolving raw children VNodes into a slot object.
- */
-function resolveSlots (
-  children,
-  context
-) {
-  var slots = {};
-  if (!children) {
-    return slots
-  }
-  for (var i = 0, l = children.length; i < l; i++) {
-    var child = children[i];
-    var data = child.data;
-    // remove slot attribute if the node is resolved as a Vue slot node
-    if (data && data.attrs && data.attrs.slot) {
-      delete data.attrs.slot;
-    }
-    // named slots should only be respected if the vnode was rendered in the
-    // same context.
-    if ((child.context === context || child.fnContext === context) &&
-      data && data.slot != null
-    ) {
-      var name = data.slot;
-      var slot = (slots[name] || (slots[name] = []));
-      if (child.tag === 'template') {
-        slot.push.apply(slot, child.children || []);
-      } else {
-        slot.push(child);
-      }
-    } else {
-      (slots.default || (slots.default = [])).push(child);
-    }
+      // cache constructor
+      cachedCtors[SuperId] = Sub;
+      return Sub
+    };
   }
-  // ignore slots that contains only whitespace
-  for (var name$1 in slots) {
-    if (slots[name$1].every(isWhitespace)) {
-      delete slots[name$1];
+
+  function initProps$1 (Comp) {
+    var props = Comp.options.props;
+    for (var key in props) {
+      proxy(Comp.prototype, "_props", key);
     }
   }
-  return slots
-}
 
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
-
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
+  function initComputed$1 (Comp) {
+    var computed = Comp.options.computed;
+    for (var key in computed) {
+      defineComputed(Comp.prototype, key, computed[key]);
     }
   }
-  return res
-}
 
-/*  */
+  /*  */
 
-var activeInstance = null;
-var isUpdatingChildComponent = false;
+  function initAssetRegisters (Vue) {
+    /**
+     * Create asset registration methods.
+     */
+    ASSET_TYPES.forEach(function (type) {
+      Vue[type] = function (
+        id,
+        definition
+      ) {
+        if (!definition) {
+          return this.options[type + 's'][id]
+        } else {
+          /* istanbul ignore if */
+          if (type === 'component') {
+            validateComponentName(id);
+          }
+          if (type === 'component' && isPlainObject(definition)) {
+            definition.name = definition.name || id;
+            definition = this.options._base.extend(definition);
+          }
+          if (type === 'directive' && typeof definition === 'function') {
+            definition = { bind: definition, update: definition };
+          }
+          this.options[type + 's'][id] = definition;
+          return definition
+        }
+      };
+    });
+  }
 
-function initLifecycle (vm) {
-  var options = vm.$options;
+  /*  */
 
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
-    }
-    parent.$children.push(vm);
-  }
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
 
-  vm.$children = [];
-  vm.$refs = {};
 
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
-}
 
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
+  function getComponentName (opts) {
+    return opts && (opts.Ctor.options.name || opts.tag)
+  }
 
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
+  function matches (pattern, name) {
+    if (Array.isArray(pattern)) {
+      return pattern.indexOf(name) > -1
+    } else if (typeof pattern === 'string') {
+      return pattern.split(',').indexOf(name) > -1
+    } else if (isRegExp(pattern)) {
+      return pattern.test(name)
     }
-  };
+    /* istanbul ignore next */
+    return false
+  }
 
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
-    }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
-    }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
-    }
-  };
-}
-
-function mountComponent (
-  vm,
-  el,
-  hydrating
-) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
+  function pruneCache (keepAliveInstance, filter) {
+    var cache = keepAliveInstance.cache;
+    var keys = keepAliveInstance.keys;
+    var _vnode = keepAliveInstance._vnode;
+    for (var key in cache) {
+      var entry = cache[key];
+      if (entry) {
+        var name = entry.name;
+        if (name && !filter(name)) {
+          pruneCacheEntry(cache, key, keys, _vnode);
+        }
       }
     }
   }
-  callHook(vm, 'beforeMount');
 
-  var updateComponent;
-  /* istanbul ignore if */
-  if ("development" !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
-  } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
+  function pruneCacheEntry (
+    cache,
+    key,
+    keys,
+    current
+  ) {
+    var entry = cache[key];
+    if (entry && (!current || entry.tag !== current.tag)) {
+      entry.componentInstance.$destroy();
+    }
+    cache[key] = null;
+    remove(keys, key);
   }
 
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
-  }
-  return vm
-}
-
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  {
-    isUpdatingChildComponent = true;
-  }
+  var patternTypes = [String, RegExp, Array];
 
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
+  var KeepAlive = {
+    name: 'keep-alive',
+    abstract: true,
 
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+    props: {
+      include: patternTypes,
+      exclude: patternTypes,
+      max: [String, Number]
+    },
 
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
+    methods: {
+      cacheVNode: function cacheVNode() {
+        var ref = this;
+        var cache = ref.cache;
+        var keys = ref.keys;
+        var vnodeToCache = ref.vnodeToCache;
+        var keyToCache = ref.keyToCache;
+        if (vnodeToCache) {
+          var tag = vnodeToCache.tag;
+          var componentInstance = vnodeToCache.componentInstance;
+          var componentOptions = vnodeToCache.componentOptions;
+          cache[keyToCache] = {
+            name: getComponentName(componentOptions),
+            tag: tag,
+            componentInstance: componentInstance,
+          };
+          keys.push(keyToCache);
+          // prune oldest entry
+          if (this.max && keys.length > parseInt(this.max)) {
+            pruneCacheEntry(cache, keys[0], keys, this._vnode);
+          }
+          this.vnodeToCache = null;
+        }
+      }
+    },
 
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+    created: function created () {
+      this.cache = Object.create(null);
+      this.keys = [];
+    },
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
+    destroyed: function destroyed () {
+      for (var key in this.cache) {
+        pruneCacheEntry(this.cache, key, this.keys);
+      }
+    },
 
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+    mounted: function mounted () {
+      var this$1 = this;
 
-  {
-    isUpdatingChildComponent = false;
-  }
-}
+      this.cacheVNode();
+      this.$watch('include', function (val) {
+        pruneCache(this$1, function (name) { return matches(val, name); });
+      });
+      this.$watch('exclude', function (val) {
+        pruneCache(this$1, function (name) { return !matches(val, name); });
+      });
+    },
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
-  }
-  return false
-}
+    updated: function updated () {
+      this.cacheVNode();
+    },
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
+    render: function render () {
+      var slot = this.$slots.default;
+      var vnode = getFirstComponentChild(slot);
+      var componentOptions = vnode && vnode.componentOptions;
+      if (componentOptions) {
+        // check pattern
+        var name = getComponentName(componentOptions);
+        var ref = this;
+        var include = ref.include;
+        var exclude = ref.exclude;
+        if (
+          // not included
+          (include && (!name || !matches(include, name))) ||
+          // excluded
+          (exclude && name && matches(exclude, name))
+        ) {
+          return vnode
+        }
 
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
+        var ref$1 = this;
+        var cache = ref$1.cache;
+        var keys = ref$1.keys;
+        var key = vnode.key == null
+          // same constructor may get registered as different local components
+          // so cid alone is not enough (#3269)
+          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+          : vnode.key;
+        if (cache[key]) {
+          vnode.componentInstance = cache[key].componentInstance;
+          // make current key freshest
+          remove(keys, key);
+          keys.push(key);
+        } else {
+          // delay setting the cache until update
+          this.vnodeToCache = vnode;
+          this.keyToCache = key;
+        }
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
+        vnode.data.keepAlive = true;
       }
+      return vnode || (slot && slot[0])
     }
-  }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
-
-/*  */
-
-
-var MAX_UPDATE_COUNT = 100;
+  };
 
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
+  var builtInComponents = {
+    KeepAlive: KeepAlive
+  };
 
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  {
-    circular = {};
-  }
-  waiting = flushing = false;
-}
+  /*  */
 
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
-
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if ("development" !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
+  function initGlobalAPI (Vue) {
+    // config
+    var configDef = {};
+    configDef.get = function () { return config; };
+    {
+      configDef.set = function () {
         warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
+          'Do not replace the Vue.config object, set individual fields instead.'
         );
-        break
-      }
+      };
     }
-  }
-
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
+    Object.defineProperty(Vue, 'config', configDef);
 
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
+    // exposed util methods.
+    // NOTE: these are not considered part of the public API - avoid relying on
+    // them unless you are aware of the risk.
+    Vue.util = {
+      warn: warn,
+      extend: extend,
+      mergeOptions: mergeOptions,
+      defineReactive: defineReactive$$1
+    };
 
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
-  }
-}
+    Vue.set = set;
+    Vue.delete = del;
+    Vue.nextTick = nextTick;
 
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
-  }
-}
+    // 2.6 explicit observable API
+    Vue.observable = function (obj) {
+      observe(obj);
+      return obj
+    };
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
-  }
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
-      }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
-    }
-  }
-}
+    Vue.options = Object.create(null);
+    ASSET_TYPES.forEach(function (type) {
+      Vue.options[type + 's'] = Object.create(null);
+    });
 
-/*  */
+    // this is used to identify the "base" constructor to extend all plain-object
+    // components with in Weex's multi-instance scenarios.
+    Vue.options._base = Vue;
 
-var uid$2 = 0;
+    extend(Vue.options.components, builtInComponents);
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
-) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
-  }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
-  } else {
-    this.deep = this.user = this.lazy = this.sync = false;
-  }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = expOrFn.toString();
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
-  } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      "development" !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
-    }
+    initUse(Vue);
+    initMixin$1(Vue);
+    initExtend(Vue);
+    initAssetRegisters(Vue);
   }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
 
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
-    } else {
-      throw e
-    }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    popTarget();
-    this.cleanupDeps();
-  }
-  return value
-};
+  initGlobalAPI(Vue);
 
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
+  Object.defineProperty(Vue.prototype, '$isServer', {
+    get: isServerRendering
+  });
+
+  Object.defineProperty(Vue.prototype, '$ssrContext', {
+    get: function get () {
+      /* istanbul ignore next */
+      return this.$vnode && this.$vnode.ssrContext
     }
-  }
-};
+  });
 
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
+  // expose FunctionalRenderContext for ssr runtime helper installation
+  Object.defineProperty(Vue, 'FunctionalRenderContext', {
+    value: FunctionalRenderContext
+  });
 
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
-    }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
-
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
-  } else {
-    queueWatcher(this);
-  }
-};
+  Vue.version = '2.6.14';
 
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
-      } else {
-        this.cb.call(this.vm, value, oldValue);
-      }
-    }
-  }
-};
+  /*  */
 
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
 
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
+    return (
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
+    )
+  };
 
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
-  }
-};
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
 
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
-    }
-    this.active = false;
-  }
-};
+  var convertEnumeratedValue = function (key, value) {
+    return isFalsyAttrValue(value) || value === 'false'
+      ? 'false'
+      // allow arbitrary string value for contenteditable
+      : key === 'contenteditable' && isValidContentEditableValue(value)
+        ? value
+        : 'true'
+  };
 
-/*  */
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,' +
+    'truespeed,typemustmatch,visible'
+  );
 
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
+  var xlinkNS = 'http://www.w3.org/1999/xlink';
 
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
+  var isXlink = function (name) {
+    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
   };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
+
+  var getXlinkProp = function (name) {
+    return isXlink(name) ? name.slice(6, name.length) : ''
   };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
-  }
-}
-
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
-        }
-      });
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
-    }
+
+  var isFalsyAttrValue = function (val) {
+    return val == null || val === false
   };
 
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
-}
-
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    "development" !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
+  /*  */
+
+  function genClassForVnode (vnode) {
+    var data = vnode.data;
+    var parentNode = vnode;
+    var childNode = vnode;
+    while (isDef(childNode.componentInstance)) {
+      childNode = childNode.componentInstance._vnode;
+      if (childNode && childNode.data) {
+        data = mergeClassData(childNode.data, data);
       }
     }
-    if (props && hasOwn(props, key)) {
-      "development" !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
+    while (isDef(parentNode = parentNode.parent)) {
+      if (parentNode && parentNode.data) {
+        data = mergeClassData(data, parentNode.data);
+      }
     }
+    return renderClass(data.staticClass, data.class)
   }
-  // observe data
-  observe(data, true /* asRootData */);
-}
 
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
-  }
-}
-
-var computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
-
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if ("development" !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
+  function mergeClassData (child, parent) {
+    return {
+      staticClass: concat(child.staticClass, parent.staticClass),
+      class: isDef(child.class)
+        ? [child.class, parent.class]
+        : parent.class
     }
+  }
 
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
+  function renderClass (
+    staticClass,
+    dynamicClass
+  ) {
+    if (isDef(staticClass) || isDef(dynamicClass)) {
+      return concat(staticClass, stringifyClass(dynamicClass))
     }
+    /* istanbul ignore next */
+    return ''
+  }
 
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
-    }
-  }
-}
-
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if ("development" !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
+  function concat (a, b) {
+    return a ? b ? (a + ' ' + b) : a : (b || '')
   }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
 
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
+  function stringifyClass (value) {
+    if (Array.isArray(value)) {
+      return stringifyArray(value)
+    }
+    if (isObject(value)) {
+      return stringifyObject(value)
+    }
+    if (typeof value === 'string') {
+      return value
     }
+    /* istanbul ignore next */
+    return ''
   }
-}
 
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
+  function stringifyArray (value) {
+    var res = '';
+    var stringified;
+    for (var i = 0, l = value.length; i < l; i++) {
+      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+        if (res) { res += ' '; }
+        res += stringified;
       }
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
+    return res
   }
-}
 
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
+  function stringifyObject (value) {
+    var res = '';
+    for (var key in value) {
+      if (value[key]) {
+        if (res) { res += ' '; }
+        res += key;
       }
-    } else {
-      createWatcher(vm, key, handler);
-    }
-  }
-}
-
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
-}
-
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
+    }
+    return res
   }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
+  /*  */
 
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
-    }
-    return function unwatchFn () {
-      watcher.teardown();
-    }
+  var namespaceMap = {
+    svg: 'http://www.w3.org/2000/svg',
+    math: 'http://www.w3.org/1998/Math/MathML'
   };
-}
 
-/*  */
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
 
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
 
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
-      }
-    });
-    observerState.shouldConvert = true;
-  }
-}
+  var isPreTag = function (tag) { return tag === 'pre'; };
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
+  };
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
-      }
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
+    }
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
     }
-    return result
   }
-}
 
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
+  var unknownElementCache = Object.create(null);
+  function isUnknownElement (tag) {
+    /* istanbul ignore if */
+    if (!inBrowser) {
+      return true
+    }
+    if (isReservedTag(tag)) {
+      return false
+    }
+    tag = tag.toLowerCase();
+    /* istanbul ignore if */
+    if (unknownElementCache[tag] != null) {
+      return unknownElementCache[tag]
+    }
+    var el = document.createElement(tag);
+    if (tag.indexOf('-') > -1) {
+      // http://stackoverflow.com/a/28210364/1070244
+      return (unknownElementCache[tag] = (
+        el.constructor === window.HTMLUnknownElement ||
+        el.constructor === window.HTMLElement
+      ))
+    } else {
+      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
     }
   }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
 
-/*  */
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
 
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if ("development" !== 'production' && !isObject(bindObject)) {
+  /*  */
+
+  /**
+   * Query an element selector if it's not an element already.
+   */
+  function query (el) {
+    if (typeof el === 'string') {
+      var selected = document.querySelector(el);
+      if (!selected) {
         warn(
-          'slot v-bind without argument expects an Object',
-          this
+          'Cannot find element: ' + el
         );
+        return document.createElement('div')
       }
-      props = extend(extend({}, bindObject), props);
+      return selected
+    } else {
+      return el
     }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if ("development" !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
-        );
-      }
-      slotNodes._rendered = true;
+  }
+
+  /*  */
+
+  function createElement$1 (tagName, vnode) {
+    var elm = document.createElement(tagName);
+    if (tagName !== 'select') {
+      return elm
     }
-    nodes = slotNodes || fallback;
+    // false or null will remove the attribute but undefined will not
+    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+      elm.setAttribute('multiple', 'multiple');
+    }
+    return elm
   }
 
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
+  function createElementNS (namespace, tagName) {
+    return document.createElementNS(namespaceMap[namespace], tagName)
   }
-}
 
-/*  */
+  function createTextNode (text) {
+    return document.createTextNode(text)
+  }
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
+  function createComment (text) {
+    return document.createComment(text)
+  }
 
-/*  */
+  function insertBefore (parentNode, newNode, referenceNode) {
+    parentNode.insertBefore(newNode, referenceNode);
+  }
 
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
+  function removeChild (node, child) {
+    node.removeChild(child);
   }
-}
 
-/*  */
+  function appendChild (node, child) {
+    node.appendChild(child);
+  }
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      "development" !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
+  function parentNode (node) {
+    return node.parentNode
+  }
 
-      for (var key in value) loop( key );
-    }
+  function nextSibling (node) {
+    return node.nextSibling
   }
-  return data
-}
 
-/*  */
+  function tagName (node) {
+    return node.tagName
+  }
 
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
+  function setTextContent (node, text) {
+    node.textContent = text;
+  }
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
-
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
-    }
-  } else {
-    markStaticNode(tree, key, isOnce);
+  function setStyleScope (node, scopeId) {
+    node.setAttribute(scopeId, '');
   }
-}
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
+  var nodeOps = /*#__PURE__*/Object.freeze({
+    createElement: createElement$1,
+    createElementNS: createElementNS,
+    createTextNode: createTextNode,
+    createComment: createComment,
+    insertBefore: insertBefore,
+    removeChild: removeChild,
+    appendChild: appendChild,
+    parentNode: parentNode,
+    nextSibling: nextSibling,
+    tagName: tagName,
+    setTextContent: setTextContent,
+    setStyleScope: setStyleScope
+  });
 
-/*  */
+  /*  */
 
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      "development" !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
+  var ref = {
+    create: function create (_, vnode) {
+      registerRef(vnode);
+    },
+    update: function update (oldVnode, vnode) {
+      if (oldVnode.data.ref !== vnode.data.ref) {
+        registerRef(oldVnode, true);
+        registerRef(vnode);
+      }
+    },
+    destroy: function destroy (vnode) {
+      registerRef(vnode, true);
+    }
+  };
+
+  function registerRef (vnode, isRemoval) {
+    var key = vnode.data.ref;
+    if (!isDef(key)) { return }
+
+    var vm = vnode.context;
+    var ref = vnode.componentInstance || vnode.elm;
+    var refs = vm.$refs;
+    if (isRemoval) {
+      if (Array.isArray(refs[key])) {
+        remove(refs[key], ref);
+      } else if (refs[key] === ref) {
+        refs[key] = undefined;
+      }
     } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
-/*  */
-
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
+      if (vnode.data.refInFor) {
+        if (!Array.isArray(refs[key])) {
+          refs[key] = [ref];
+        } else if (refs[key].indexOf(ref) < 0) {
+          // $flow-disable-line
+          refs[key].push(ref);
+        }
+      } else {
+        refs[key] = ref;
       }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
     }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
   }
 
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
+  /**
+   * Virtual DOM patching algorithm based on Snabbdom by
+   * Simon Friis Vindum (@paldepind)
+   * Licensed under the MIT License
+   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+   *
+   * modified by Evan You (@yyx990803)
+   *
+   * Not type-checking this because this file is perf-critical and the cost
+   * of making flow understand it is not worth it.
+   */
+
+  var emptyNode = new VNode('', {}, []);
 
-  var vnode = options.render.call(null, renderContext._c, renderContext);
+  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
 
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
-    }
+  function sameVnode (a, b) {
+    return (
+      a.key === b.key &&
+      a.asyncFactory === b.asyncFactory && (
+        (
+          a.tag === b.tag &&
+          a.isComment === b.isComment &&
+          isDef(a.data) === isDef(b.data) &&
+          sameInputType(a, b)
+        ) || (
+          isTrue(a.isAsyncPlaceholder) &&
+          isUndef(b.asyncFactory.error)
+        )
+      )
+    )
   }
 
-  return vnode
-}
+  function sameInputType (a, b) {
+    if (a.tag !== 'input') { return true }
+    var i;
+    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+  }
 
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
+  function createKeyToOldIdx (children, beginIdx, endIdx) {
+    var i, key;
+    var map = {};
+    for (i = beginIdx; i <= endIdx; ++i) {
+      key = children[i].key;
+      if (isDef(key)) { map[key] = i; }
+    }
+    return map
   }
-}
 
-/*  */
+  function createPatchFunction (backend) {
+    var i, j;
+    var cbs = {};
+
+    var modules = backend.modules;
+    var nodeOps = backend.nodeOps;
 
+    for (i = 0; i < hooks.length; ++i) {
+      cbs[hooks[i]] = [];
+      for (j = 0; j < modules.length; ++j) {
+        if (isDef(modules[j][hooks[i]])) {
+          cbs[hooks[i]].push(modules[j][hooks[i]]);
+        }
+      }
+    }
 
+    function emptyNodeAt (elm) {
+      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    }
 
+    function createRmCb (childElm, listeners) {
+      function remove$$1 () {
+        if (--remove$$1.listeners === 0) {
+          removeNode(childElm);
+        }
+      }
+      remove$$1.listeners = listeners;
+      return remove$$1
+    }
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
+    function removeNode (el) {
+      var parent = nodeOps.parentNode(el);
+      // element may have already been removed due to v-html / v-text
+      if (isDef(parent)) {
+        nodeOps.removeChild(parent, el);
+      }
+    }
 
+    function isUnknownElement$$1 (vnode, inVPre) {
+      return (
+        !inVPre &&
+        !vnode.ns &&
+        !(
+          config.ignoredElements.length &&
+          config.ignoredElements.some(function (ignore) {
+            return isRegExp(ignore)
+              ? ignore.test(vnode.tag)
+              : ignore === vnode.tag
+          })
+        ) &&
+        config.isUnknownElement(vnode.tag)
+      )
+    }
 
-// Updates the state of the component to weex native render engine.
+    var creatingElmInVPre = 0;
 
-/*  */
+    function createElm (
+      vnode,
+      insertedVnodeQueue,
+      parentElm,
+      refElm,
+      nested,
+      ownerArray,
+      index
+    ) {
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // This vnode was used in a previous render!
+        // now it's used as a new node, overwriting its elm would cause
+        // potential patch errors down the road when it's used as an insertion
+        // reference node. Instead, we clone the node on-demand before creating
+        // associated DOM element for it.
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
 
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
+      vnode.isRootInsert = !nested; // for transition enter check
+      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+        return
+      }
 
-// listening on native callback
+      var data = vnode.data;
+      var children = vnode.children;
+      var tag = vnode.tag;
+      if (isDef(tag)) {
+        {
+          if (data && data.pre) {
+            creatingElmInVPre++;
+          }
+          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+            warn(
+              'Unknown custom element: <' + tag + '> - did you ' +
+              'register the component correctly? For recursive components, ' +
+              'make sure to provide the "name" option.',
+              vnode.context
+            );
+          }
+        }
 
-/*  */
+        vnode.elm = vnode.ns
+          ? nodeOps.createElementNS(vnode.ns, tag)
+          : nodeOps.createElement(tag, vnode);
+        setScope(vnode);
 
-/*  */
+        /* istanbul ignore if */
+        {
+          createChildren(vnode, children, insertedVnodeQueue);
+          if (isDef(data)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+          }
+          insert(parentElm, vnode.elm, refElm);
+        }
 
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
+        if (data && data.pre) {
+          creatingElmInVPre--;
+        }
+      } else if (isTrue(vnode.isComment)) {
+        vnode.elm = nodeOps.createComment(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
       } else {
-        activateChildComponent(componentInstance, true /* direct */);
+        vnode.elm = nodeOps.createTextNode(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      }
+    }
+
+    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i = vnode.data;
+      if (isDef(i)) {
+        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+        if (isDef(i = i.hook) && isDef(i = i.init)) {
+          i(vnode, false /* hydrating */);
+        }
+        // after calling the init hook, if the vnode is a child component
+        // it should've created a child instance and mounted it. the child
+        // component also has set the placeholder vnode's elm.
+        // in that case we can just return the element and be done.
+        if (isDef(vnode.componentInstance)) {
+          initComponent(vnode, insertedVnodeQueue);
+          insert(parentElm, vnode.elm, refElm);
+          if (isTrue(isReactivated)) {
+            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+          }
+          return true
+        }
       }
     }
-  },
 
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
+    function initComponent (vnode, insertedVnodeQueue) {
+      if (isDef(vnode.data.pendingInsert)) {
+        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+        vnode.data.pendingInsert = null;
+      }
+      vnode.elm = vnode.componentInstance.$el;
+      if (isPatchable(vnode)) {
+        invokeCreateHooks(vnode, insertedVnodeQueue);
+        setScope(vnode);
       } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
+        // empty component root.
+        // skip all element-related modules except for ref (#3455)
+        registerRef(vnode);
+        // make sure to invoke the insert hook
+        insertedVnodeQueue.push(vnode);
       }
     }
-  }
-};
 
-var hooksToMerge = Object.keys(componentVNodeHooks);
+    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i;
+      // hack for #4339: a reactivated component with inner transition
+      // does not trigger because the inner node's created hooks are not called
+      // again. It's not ideal to involve module-specific logic in here but
+      // there doesn't seem to be a better way to do it.
+      var innerNode = vnode;
+      while (innerNode.componentInstance) {
+        innerNode = innerNode.componentInstance._vnode;
+        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+          for (i = 0; i < cbs.activate.length; ++i) {
+            cbs.activate[i](emptyNode, innerNode);
+          }
+          insertedVnodeQueue.push(innerNode);
+          break
+        }
+      }
+      // unlike a newly created component,
+      // a reactivated keep-alive component doesn't insert itself
+      insert(parentElm, vnode.elm, refElm);
+    }
 
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
+    function insert (parent, elm, ref$$1) {
+      if (isDef(parent)) {
+        if (isDef(ref$$1)) {
+          if (nodeOps.parentNode(ref$$1) === parent) {
+            nodeOps.insertBefore(parent, elm, ref$$1);
+          }
+        } else {
+          nodeOps.appendChild(parent, elm);
+        }
+      }
+    }
 
-  var baseCtor = context.$options._base;
+    function createChildren (vnode, children, insertedVnodeQueue) {
+      if (Array.isArray(children)) {
+        {
+          checkDuplicateKeys(children);
+        }
+        for (var i = 0; i < children.length; ++i) {
+          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+        }
+      } else if (isPrimitive(vnode.text)) {
+        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+      }
+    }
 
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
+    function isPatchable (vnode) {
+      while (vnode.componentInstance) {
+        vnode = vnode.componentInstance._vnode;
+      }
+      return isDef(vnode.tag)
+    }
 
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
-    }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+    function invokeCreateHooks (vnode, insertedVnodeQueue) {
+      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+        cbs.create[i$1](emptyNode, vnode);
+      }
+      i = vnode.data.hook; // Reuse variable
+      if (isDef(i)) {
+        if (isDef(i.create)) { i.create(emptyNode, vnode); }
+        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+      }
     }
-  }
 
-  data = data || {};
+    // set scope id attribute for scoped CSS.
+    // this is implemented as a special case to avoid the overhead
+    // of going through the normal attribute patching process.
+    function setScope (vnode) {
+      var i;
+      if (isDef(i = vnode.fnScopeId)) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      } else {
+        var ancestor = vnode;
+        while (ancestor) {
+          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+            nodeOps.setStyleScope(vnode.elm, i);
+          }
+          ancestor = ancestor.parent;
+        }
+      }
+      // for slot content they should also get the scopeId from the host instance.
+      if (isDef(i = activeInstance) &&
+        i !== vnode.context &&
+        i !== vnode.fnContext &&
+        isDef(i = i.$options._scopeId)
+      ) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      }
+    }
 
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
+    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+      }
+    }
 
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
+    function invokeDestroyHook (vnode) {
+      var i, j;
+      var data = vnode.data;
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+      }
+      if (isDef(i = vnode.children)) {
+        for (j = 0; j < vnode.children.length; ++j) {
+          invokeDestroyHook(vnode.children[j]);
+        }
+      }
+    }
 
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+    function removeVnodes (vnodes, startIdx, endIdx) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        var ch = vnodes[startIdx];
+        if (isDef(ch)) {
+          if (isDef(ch.tag)) {
+            removeAndInvokeRemoveHook(ch);
+            invokeDestroyHook(ch);
+          } else { // Text node
+            removeNode(ch.elm);
+          }
+        }
+      }
+    }
 
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
-  }
+    function removeAndInvokeRemoveHook (vnode, rm) {
+      if (isDef(rm) || isDef(vnode.data)) {
+        var i;
+        var listeners = cbs.remove.length + 1;
+        if (isDef(rm)) {
+          // we have a recursively passed down rm callback
+          // increase the listeners count
+          rm.listeners += listeners;
+        } else {
+          // directly removing
+          rm = createRmCb(vnode.elm, listeners);
+        }
+        // recursively invoke hooks on child component root node
+        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+          removeAndInvokeRemoveHook(i, rm);
+        }
+        for (i = 0; i < cbs.remove.length; ++i) {
+          cbs.remove[i](vnode, rm);
+        }
+        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+          i(vnode, rm);
+        } else {
+          rm();
+        }
+      } else {
+        removeNode(vnode.elm);
+      }
+    }
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
+    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+      var oldStartIdx = 0;
+      var newStartIdx = 0;
+      var oldEndIdx = oldCh.length - 1;
+      var oldStartVnode = oldCh[0];
+      var oldEndVnode = oldCh[oldEndIdx];
+      var newEndIdx = newCh.length - 1;
+      var newStartVnode = newCh[0];
+      var newEndVnode = newCh[newEndIdx];
+      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
 
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
+      // removeOnly is a special flag used only by <transition-group>
+      // to ensure removed elements stay in correct relative positions
+      // during leaving transitions
+      var canMove = !removeOnly;
 
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
+      {
+        checkDuplicateKeys(newCh);
+      }
+
+      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+        if (isUndef(oldStartVnode)) {
+          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+        } else if (isUndef(oldEndVnode)) {
+          oldEndVnode = oldCh[--oldEndIdx];
+        } else if (sameVnode(oldStartVnode, newStartVnode)) {
+          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          oldStartVnode = oldCh[++oldStartIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else if (sameVnode(oldEndVnode, newEndVnode)) {
+          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+          oldStartVnode = oldCh[++oldStartIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else {
+          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+          idxInOld = isDef(newStartVnode.key)
+            ? oldKeyToIdx[newStartVnode.key]
+            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+          if (isUndef(idxInOld)) { // New element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          } else {
+            vnodeToMove = oldCh[idxInOld];
+            if (sameVnode(vnodeToMove, newStartVnode)) {
+              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+              oldCh[idxInOld] = undefined;
+              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+            } else {
+              // same key but different element. treat as new element
+              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+            }
+          }
+          newStartVnode = newCh[++newStartIdx];
+        }
+      }
+      if (oldStartIdx > oldEndIdx) {
+        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+      } else if (newStartIdx > newEndIdx) {
+        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+      }
     }
-  }
-
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
 
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
-
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
-
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
-}
-
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
-
-/*  */
-
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
-
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
-  }
-  return _createElement(context, tag, data, children, normalizationType)
-}
-
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    "development" !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
-  }
-  // warn against non-primitive key
-  if ("development" !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
+    function checkDuplicateKeys (children) {
+      var seenKeys = {};
+      for (var i = 0; i < children.length; i++) {
+        var vnode = children[i];
+        var key = vnode.key;
+        if (isDef(key)) {
+          if (seenKeys[key]) {
+            warn(
+              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+              vnode.context
+            );
+          } else {
+            seenKeys[key] = true;
+          }
+        }
+      }
     }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
+
+    function findIdxInOld (node, oldCh, start, end) {
+      for (var i = start; i < end; i++) {
+        var c = oldCh[i];
+        if (isDef(c) && sameVnode(node, c)) { return i }
+      }
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  }
-}
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
+    function patchVnode (
+      oldVnode,
+      vnode,
+      insertedVnodeQueue,
+      ownerArray,
+      index,
+      removeOnly
+    ) {
+      if (oldVnode === vnode) {
+        return
+      }
 
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // clone reused vnode
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
 
-  Vue.prototype._render = function () {
-    var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
+      var elm = vnode.elm = oldVnode.elm;
 
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
+      if (isTrue(oldVnode.isAsyncPlaceholder)) {
+        if (isDef(vnode.asyncFactory.resolved)) {
+          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+        } else {
+          vnode.isAsyncPlaceholder = true;
         }
+        return
       }
-    }
 
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
+      // reuse element for static trees.
+      // note we only do this if the vnode is cloned -
+      // if the new node is not cloned it means the render functions have been
+      // reset by the hot-reload-api and we need to do a proper re-render.
+      if (isTrue(vnode.isStatic) &&
+        isTrue(oldVnode.isStatic) &&
+        vnode.key === oldVnode.key &&
+        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+      ) {
+        vnode.componentInstance = oldVnode.componentInstance;
+        return
+      }
 
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
+      var i;
+      var data = vnode.data;
+      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+        i(oldVnode, vnode);
+      }
+
+      var oldCh = oldVnode.children;
+      var ch = vnode.children;
+      if (isDef(data) && isPatchable(vnode)) {
+        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+      }
+      if (isUndef(vnode.text)) {
+        if (isDef(oldCh) && isDef(ch)) {
+          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+        } else if (isDef(ch)) {
+          {
+            checkDuplicateKeys(ch);
           }
-        } else {
-          vnode = vm._vnode;
+          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+        } else if (isDef(oldCh)) {
+          removeVnodes(oldCh, 0, oldCh.length - 1);
+        } else if (isDef(oldVnode.text)) {
+          nodeOps.setTextContent(elm, '');
         }
+      } else if (oldVnode.text !== vnode.text) {
+        nodeOps.setTextContent(elm, vnode.text);
       }
-    }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if ("development" !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
       }
-      vnode = createEmptyVNode();
     }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
-  };
-}
 
-/*  */
+    function invokeInsertHook (vnode, queue, initial) {
+      // delay insert hooks for component root nodes, invoke them after the
+      // element is really inserted
+      if (isTrue(initial) && isDef(vnode.parent)) {
+        vnode.parent.data.pendingInsert = queue;
+      } else {
+        for (var i = 0; i < queue.length; ++i) {
+          queue[i].data.hook.insert(queue[i]);
+        }
+      }
+    }
 
-var uid$1 = 0;
+    var hydrationBailed = false;
+    // list of modules that can skip create hook during hydration because they
+    // are already rendered on the client or has no need for initialization
+    // Note: style is excluded because it relies on initial clone for future
+    // deep updates (#7063).
+    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
 
-function initMixin (Vue) {
-  Vue.prototype._init = function (options) {
-    var vm = this;
-    // a uid
-    vm._uid = uid$1++;
+    // Note: this is a browser-only function so we can assume elms are DOM nodes.
+    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+      var i;
+      var tag = vnode.tag;
+      var data = vnode.data;
+      var children = vnode.children;
+      inVPre = inVPre || (data && data.pre);
+      vnode.elm = elm;
 
-    var startTag, endTag;
-    /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
-      startTag = "vue-perf-start:" + (vm._uid);
-      endTag = "vue-perf-end:" + (vm._uid);
-      mark(startTag);
-    }
-
-    // a flag to avoid this being observed
-    vm._isVue = true;
-    // merge options
-    if (options && options._isComponent) {
-      // optimize internal component instantiation
-      // since dynamic options merging is pretty slow, and none of the
-      // internal component options needs special treatment.
-      initInternalComponent(vm, options);
-    } else {
-      vm.$options = mergeOptions(
-        resolveConstructorOptions(vm.constructor),
-        options || {},
-        vm
-      );
+      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+        vnode.isAsyncPlaceholder = true;
+        return true
+      }
+      // assert node match
+      {
+        if (!assertNodeMatch(elm, vnode, inVPre)) {
+          return false
+        }
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+        if (isDef(i = vnode.componentInstance)) {
+          // child component. it should have hydrated its own tree.
+          initComponent(vnode, insertedVnodeQueue);
+          return true
+        }
+      }
+      if (isDef(tag)) {
+        if (isDef(children)) {
+          // empty element, allow client to pick up and populate children
+          if (!elm.hasChildNodes()) {
+            createChildren(vnode, children, insertedVnodeQueue);
+          } else {
+            // v-html and domProps: innerHTML
+            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+              if (i !== elm.innerHTML) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('server innerHTML: ', i);
+                  console.warn('client innerHTML: ', elm.innerHTML);
+                }
+                return false
+              }
+            } else {
+              // iterate and compare children lists
+              var childrenMatch = true;
+              var childNode = elm.firstChild;
+              for (var i$1 = 0; i$1 < children.length; i$1++) {
+                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                  childrenMatch = false;
+                  break
+                }
+                childNode = childNode.nextSibling;
+              }
+              // if childNode is not null, it means the actual childNodes list is
+              // longer than the virtual children list.
+              if (!childrenMatch || childNode) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+                }
+                return false
+              }
+            }
+          }
+        }
+        if (isDef(data)) {
+          var fullInvoke = false;
+          for (var key in data) {
+            if (!isRenderedModule(key)) {
+              fullInvoke = true;
+              invokeCreateHooks(vnode, insertedVnodeQueue);
+              break
+            }
+          }
+          if (!fullInvoke && data['class']) {
+            // ensure collecting deps for deep class bindings for future updates
+            traverse(data['class']);
+          }
+        }
+      } else if (elm.data !== vnode.text) {
+        elm.data = vnode.text;
+      }
+      return true
     }
-    /* istanbul ignore else */
-    {
-      initProxy(vm);
-    }
-    // expose real self
-    vm._self = vm;
-    initLifecycle(vm);
-    initEvents(vm);
-    initRender(vm);
-    callHook(vm, 'beforeCreate');
-    initInjections(vm); // resolve injections before data/props
-    initState(vm);
-    initProvide(vm); // resolve provide after data/props
-    callHook(vm, 'created');
 
-    /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
-      vm._name = formatComponentName(vm, false);
-      mark(endTag);
-      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    function assertNodeMatch (node, vnode, inVPre) {
+      if (isDef(vnode.tag)) {
+        return vnode.tag.indexOf('vue-component') === 0 || (
+          !isUnknownElement$$1(vnode, inVPre) &&
+          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+        )
+      } else {
+        return node.nodeType === (vnode.isComment ? 8 : 3)
+      }
     }
 
-    if (vm.$options.el) {
-      vm.$mount(vm.$options.el);
-    }
-  };
-}
-
-function initInternalComponent (vm, options) {
-  var opts = vm.$options = Object.create(vm.constructor.options);
-  // doing this because it's faster than dynamic enumeration.
-  var parentVnode = options._parentVnode;
-  opts.parent = options.parent;
-  opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
-
-  var vnodeComponentOptions = parentVnode.componentOptions;
-  opts.propsData = vnodeComponentOptions.propsData;
-  opts._parentListeners = vnodeComponentOptions.listeners;
-  opts._renderChildren = vnodeComponentOptions.children;
-  opts._componentTag = vnodeComponentOptions.tag;
-
-  if (options.render) {
-    opts.render = options.render;
-    opts.staticRenderFns = options.staticRenderFns;
-  }
-}
-
-function resolveConstructorOptions (Ctor) {
-  var options = Ctor.options;
-  if (Ctor.super) {
-    var superOptions = resolveConstructorOptions(Ctor.super);
-    var cachedSuperOptions = Ctor.superOptions;
-    if (superOptions !== cachedSuperOptions) {
-      // super option changed,
-      // need to resolve new options.
-      Ctor.superOptions = superOptions;
-      // check if there are any late-modified/attached options (#4976)
-      var modifiedOptions = resolveModifiedOptions(Ctor);
-      // update base extend options
-      if (modifiedOptions) {
-        extend(Ctor.extendOptions, modifiedOptions);
-      }
-      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-      if (options.name) {
-        options.components[options.name] = Ctor;
-      }
-    }
-  }
-  return options
-}
-
-function resolveModifiedOptions (Ctor) {
-  var modified;
-  var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
-  var sealed = Ctor.sealedOptions;
-  for (var key in latest) {
-    if (latest[key] !== sealed[key]) {
-      if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-    }
-  }
-  return modified
-}
-
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
+    return function patch (oldVnode, vnode, hydrating, removeOnly) {
+      if (isUndef(vnode)) {
+        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+        return
       }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
 
-function Vue$3 (options) {
-  if ("development" !== 'production' &&
-    !(this instanceof Vue$3)
-  ) {
-    warn('Vue is a constructor and should be called with the `new` keyword');
-  }
-  this._init(options);
-}
+      var isInitialPatch = false;
+      var insertedVnodeQueue = [];
+
+      if (isUndef(oldVnode)) {
+        // empty mount (likely as component), create new root element
+        isInitialPatch = true;
+        createElm(vnode, insertedVnodeQueue);
+      } else {
+        var isRealElement = isDef(oldVnode.nodeType);
+        if (!isRealElement && sameVnode(oldVnode, vnode)) {
+          // patch existing root node
+          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+        } else {
+          if (isRealElement) {
+            // mounting to a real element
+            // check if this is server-rendered content and if we can perform
+            // a successful hydration.
+            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+              oldVnode.removeAttribute(SSR_ATTR);
+              hydrating = true;
+            }
+            if (isTrue(hydrating)) {
+              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+                invokeInsertHook(vnode, insertedVnodeQueue, true);
+                return oldVnode
+              } else {
+                warn(
+                  'The client-side rendered virtual DOM tree is not matching ' +
+                  'server-rendered content. This is likely caused by incorrect ' +
+                  'HTML markup, for example nesting block-level elements inside ' +
+                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                  'full client-side render.'
+                );
+              }
+            }
+            // either not server-rendered, or hydration failed.
+            // create an empty node and replace it
+            oldVnode = emptyNodeAt(oldVnode);
+          }
+
+          // replacing existing element
+          var oldElm = oldVnode.elm;
+          var parentElm = nodeOps.parentNode(oldElm);
+
+          // create new node
+          createElm(
+            vnode,
+            insertedVnodeQueue,
+            // extremely rare edge case: do not insert if old element is in a
+            // leaving transition. Only happens when combining transition +
+            // keep-alive + HOCs. (#4590)
+            oldElm._leaveCb ? null : parentElm,
+            nodeOps.nextSibling(oldElm)
+          );
 
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
+          // update parent placeholder node element, recursively
+          if (isDef(vnode.parent)) {
+            var ancestor = vnode.parent;
+            var patchable = isPatchable(vnode);
+            while (ancestor) {
+              for (var i = 0; i < cbs.destroy.length; ++i) {
+                cbs.destroy[i](ancestor);
+              }
+              ancestor.elm = vnode.elm;
+              if (patchable) {
+                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                  cbs.create[i$1](emptyNode, ancestor);
+                }
+                // #6513
+                // invoke insert hooks that may have been merged by create hooks.
+                // e.g. for directives that uses the "inserted" hook.
+                var insert = ancestor.data.hook.insert;
+                if (insert.merged) {
+                  // start at index 1 to avoid re-invoking component mounted hook
+                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                    insert.fns[i$2]();
+                  }
+                }
+              } else {
+                registerRef(ancestor);
+              }
+              ancestor = ancestor.parent;
+            }
+          }
 
-/*  */
+          // destroy old node
+          if (isDef(parentElm)) {
+            removeVnodes([oldVnode], 0, 0);
+          } else if (isDef(oldVnode.tag)) {
+            invokeDestroyHook(oldVnode);
+          }
+        }
+      }
 
-function initUse (Vue) {
-  Vue.use = function (plugin) {
-    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-    if (installedPlugins.indexOf(plugin) > -1) {
-      return this
+      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+      return vnode.elm
     }
+  }
+
+  /*  */
 
-    // additional parameters
-    var args = toArray(arguments, 1);
-    args.unshift(this);
-    if (typeof plugin.install === 'function') {
-      plugin.install.apply(plugin, args);
-    } else if (typeof plugin === 'function') {
-      plugin.apply(null, args);
+  var directives = {
+    create: updateDirectives,
+    update: updateDirectives,
+    destroy: function unbindDirectives (vnode) {
+      updateDirectives(vnode, emptyNode);
     }
-    installedPlugins.push(plugin);
-    return this
   };
-}
 
-/*  */
-
-function initMixin$1 (Vue) {
-  Vue.mixin = function (mixin) {
-    this.options = mergeOptions(this.options, mixin);
-    return this
-  };
-}
+  function updateDirectives (oldVnode, vnode) {
+    if (oldVnode.data.directives || vnode.data.directives) {
+      _update(oldVnode, vnode);
+    }
+  }
 
-/*  */
+  function _update (oldVnode, vnode) {
+    var isCreate = oldVnode === emptyNode;
+    var isDestroy = vnode === emptyNode;
+    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
 
-function initExtend (Vue) {
-  /**
-   * Each instance constructor, including Vue, has a unique
-   * cid. This enables us to create wrapped "child
-   * constructors" for prototypal inheritance and cache them.
-   */
-  Vue.cid = 0;
-  var cid = 1;
+    var dirsWithInsert = [];
+    var dirsWithPostpatch = [];
 
-  /**
-   * Class inheritance
-   */
-  Vue.extend = function (extendOptions) {
-    extendOptions = extendOptions || {};
-    var Super = this;
-    var SuperId = Super.cid;
-    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-    if (cachedCtors[SuperId]) {
-      return cachedCtors[SuperId]
+    var key, oldDir, dir;
+    for (key in newDirs) {
+      oldDir = oldDirs[key];
+      dir = newDirs[key];
+      if (!oldDir) {
+        // new directive, bind
+        callHook$1(dir, 'bind', vnode, oldVnode);
+        if (dir.def && dir.def.inserted) {
+          dirsWithInsert.push(dir);
+        }
+      } else {
+        // existing directive, update
+        dir.oldValue = oldDir.value;
+        dir.oldArg = oldDir.arg;
+        callHook$1(dir, 'update', vnode, oldVnode);
+        if (dir.def && dir.def.componentUpdated) {
+          dirsWithPostpatch.push(dir);
+        }
+      }
     }
 
-    var name = extendOptions.name || Super.options.name;
-    if ("development" !== 'production' && name) {
-      validateComponentName(name);
+    if (dirsWithInsert.length) {
+      var callInsert = function () {
+        for (var i = 0; i < dirsWithInsert.length; i++) {
+          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+        }
+      };
+      if (isCreate) {
+        mergeVNodeHook(vnode, 'insert', callInsert);
+      } else {
+        callInsert();
+      }
     }
 
-    var Sub = function VueComponent (options) {
-      this._init(options);
-    };
-    Sub.prototype = Object.create(Super.prototype);
-    Sub.prototype.constructor = Sub;
-    Sub.cid = cid++;
-    Sub.options = mergeOptions(
-      Super.options,
-      extendOptions
-    );
-    Sub['super'] = Super;
-
-    // For props and computed properties, we define the proxy getters on
-    // the Vue instances at extension time, on the extended prototype. This
-    // avoids Object.defineProperty calls for each instance created.
-    if (Sub.options.props) {
-      initProps$1(Sub);
-    }
-    if (Sub.options.computed) {
-      initComputed$1(Sub);
+    if (dirsWithPostpatch.length) {
+      mergeVNodeHook(vnode, 'postpatch', function () {
+        for (var i = 0; i < dirsWithPostpatch.length; i++) {
+          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+        }
+      });
     }
 
-    // allow further extension/mixin/plugin usage
-    Sub.extend = Super.extend;
-    Sub.mixin = Super.mixin;
-    Sub.use = Super.use;
-
-    // create asset registers, so extended classes
-    // can have their private assets too.
-    ASSET_TYPES.forEach(function (type) {
-      Sub[type] = Super[type];
-    });
-    // enable recursive self-lookup
-    if (name) {
-      Sub.options.components[name] = Sub;
+    if (!isCreate) {
+      for (key in oldDirs) {
+        if (!newDirs[key]) {
+          // no longer present, unbind
+          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+        }
+      }
     }
+  }
 
-    // keep a reference to the super options at extension time.
-    // later at instantiation we can check if Super's options have
-    // been updated.
-    Sub.superOptions = Super.options;
-    Sub.extendOptions = extendOptions;
-    Sub.sealedOptions = extend({}, Sub.options);
-
-    // cache constructor
-    cachedCtors[SuperId] = Sub;
-    return Sub
-  };
-}
+  var emptyModifiers = Object.create(null);
 
-function initProps$1 (Comp) {
-  var props = Comp.options.props;
-  for (var key in props) {
-    proxy(Comp.prototype, "_props", key);
+  function normalizeDirectives$1 (
+    dirs,
+    vm
+  ) {
+    var res = Object.create(null);
+    if (!dirs) {
+      // $flow-disable-line
+      return res
+    }
+    var i, dir;
+    for (i = 0; i < dirs.length; i++) {
+      dir = dirs[i];
+      if (!dir.modifiers) {
+        // $flow-disable-line
+        dir.modifiers = emptyModifiers;
+      }
+      res[getRawDirName(dir)] = dir;
+      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+    }
+    // $flow-disable-line
+    return res
   }
-}
 
-function initComputed$1 (Comp) {
-  var computed = Comp.options.computed;
-  for (var key in computed) {
-    defineComputed(Comp.prototype, key, computed[key]);
+  function getRawDirName (dir) {
+    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
   }
-}
-
-/*  */
 
-function initAssetRegisters (Vue) {
-  /**
-   * Create asset registration methods.
-   */
-  ASSET_TYPES.forEach(function (type) {
-    Vue[type] = function (
-      id,
-      definition
-    ) {
-      if (!definition) {
-        return this.options[type + 's'][id]
-      } else {
-        /* istanbul ignore if */
-        if ("development" !== 'production' && type === 'component') {
-          validateComponentName(id);
-        }
-        if (type === 'component' && isPlainObject(definition)) {
-          definition.name = definition.name || id;
-          definition = this.options._base.extend(definition);
-        }
-        if (type === 'directive' && typeof definition === 'function') {
-          definition = { bind: definition, update: definition };
-        }
-        this.options[type + 's'][id] = definition;
-        return definition
+  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+    var fn = dir.def && dir.def[hook];
+    if (fn) {
+      try {
+        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+      } catch (e) {
+        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
       }
-    };
-  });
-}
-
-/*  */
+    }
+  }
 
-function getComponentName (opts) {
-  return opts && (opts.Ctor.options.name || opts.tag)
-}
+  var baseModules = [
+    ref,
+    directives
+  ];
 
-function matches (pattern, name) {
-  if (Array.isArray(pattern)) {
-    return pattern.indexOf(name) > -1
-  } else if (typeof pattern === 'string') {
-    return pattern.split(',').indexOf(name) > -1
-  } else if (isRegExp(pattern)) {
-    return pattern.test(name)
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-function pruneCache (keepAliveInstance, filter) {
-  var cache = keepAliveInstance.cache;
-  var keys = keepAliveInstance.keys;
-  var _vnode = keepAliveInstance._vnode;
-  for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
-      if (name && !filter(name)) {
-        pruneCacheEntry(cache, key, keys, _vnode);
-      }
-    }
-  }
-}
-
-function pruneCacheEntry (
-  cache,
-  key,
-  keys,
-  current
-) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
-  }
-  cache[key] = null;
-  remove(keys, key);
-}
-
-var patternTypes = [String, RegExp, Array];
-
-var KeepAlive = {
-  name: 'keep-alive',
-  abstract: true,
-
-  props: {
-    include: patternTypes,
-    exclude: patternTypes,
-    max: [String, Number]
-  },
-
-  created: function created () {
-    this.cache = Object.create(null);
-    this.keys = [];
-  },
-
-  destroyed: function destroyed () {
-    var this$1 = this;
+  /*  */
 
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
+  function updateAttrs (oldVnode, vnode) {
+    var opts = vnode.componentOptions;
+    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+      return
+    }
+    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+      return
+    }
+    var key, cur, old;
+    var elm = vnode.elm;
+    var oldAttrs = oldVnode.data.attrs || {};
+    var attrs = vnode.data.attrs || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(attrs.__ob__)) {
+      attrs = vnode.data.attrs = extend({}, attrs);
     }
-  },
 
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
-  },
-
-  render: function render () {
-    var slot = this.$slots.default;
-    var vnode = getFirstComponentChild(slot);
-    var componentOptions = vnode && vnode.componentOptions;
-    if (componentOptions) {
-      // check pattern
-      var name = getComponentName(componentOptions);
-      var ref = this;
-      var include = ref.include;
-      var exclude = ref.exclude;
-      if (
-        // not included
-        (include && (!name || !matches(include, name))) ||
-        // excluded
-        (exclude && name && matches(exclude, name))
-      ) {
-        return vnode
+    for (key in attrs) {
+      cur = attrs[key];
+      old = oldAttrs[key];
+      if (old !== cur) {
+        setAttr(elm, key, cur, vnode.data.pre);
       }
-
-      var ref$1 = this;
-      var cache = ref$1.cache;
-      var keys = ref$1.keys;
-      var key = vnode.key == null
-        // same constructor may get registered as different local components
-        // so cid alone is not enough (#3269)
-        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
-        : vnode.key;
-      if (cache[key]) {
-        vnode.componentInstance = cache[key].componentInstance;
-        // make current key freshest
-        remove(keys, key);
-        keys.push(key);
-      } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+    }
+    // #4391: in IE9, setting type can reset value for input[type=radio]
+    // #6666: IE/Edge forces progress value down to 1 before setting a max
+    /* istanbul ignore if */
+    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+      setAttr(elm, 'value', attrs.value);
+    }
+    for (key in oldAttrs) {
+      if (isUndef(attrs[key])) {
+        if (isXlink(key)) {
+          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+        } else if (!isEnumeratedAttr(key)) {
+          elm.removeAttribute(key);
         }
       }
-
-      vnode.data.keepAlive = true;
     }
-    return vnode || (slot && slot[0])
   }
-};
 
-var builtInComponents = {
-  KeepAlive: KeepAlive
-};
-
-/*  */
+  function setAttr (el, key, value, isInPre) {
+    if (isInPre || el.tagName.indexOf('-') > -1) {
+      baseSetAttr(el, key, value);
+    } else if (isBooleanAttr(key)) {
+      // set attribute for blank value
+      // e.g. <option disabled>Select one</option>
+      if (isFalsyAttrValue(value)) {
+        el.removeAttribute(key);
+      } else {
+        // technically allowfullscreen is a boolean attribute for <iframe>,
+        // but Flash expects a value of "true" when used on <embed> tag
+        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+          ? 'true'
+          : key;
+        el.setAttribute(key, value);
+      }
+    } else if (isEnumeratedAttr(key)) {
+      el.setAttribute(key, convertEnumeratedValue(key, value));
+    } else if (isXlink(key)) {
+      if (isFalsyAttrValue(value)) {
+        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else {
+        el.setAttributeNS(xlinkNS, key, value);
+      }
+    } else {
+      baseSetAttr(el, key, value);
+    }
+  }
 
-function initGlobalAPI (Vue) {
-  // config
-  var configDef = {};
-  configDef.get = function () { return config; };
-  {
-    configDef.set = function () {
-      warn(
-        'Do not replace the Vue.config object, set individual fields instead.'
-      );
-    };
+  function baseSetAttr (el, key, value) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // #7138: IE10 & 11 fires input event when setting placeholder on
+      // <textarea>... block the first input event and remove the blocker
+      // immediately.
+      /* istanbul ignore if */
+      if (
+        isIE && !isIE9 &&
+        el.tagName === 'TEXTAREA' &&
+        key === 'placeholder' && value !== '' && !el.__ieph
+      ) {
+        var blocker = function (e) {
+          e.stopImmediatePropagation();
+          el.removeEventListener('input', blocker);
+        };
+        el.addEventListener('input', blocker);
+        // $flow-disable-line
+        el.__ieph = true; /* IE placeholder patched */
+      }
+      el.setAttribute(key, value);
+    }
   }
-  Object.defineProperty(Vue, 'config', configDef);
 
-  // exposed util methods.
-  // NOTE: these are not considered part of the public API - avoid relying on
-  // them unless you are aware of the risk.
-  Vue.util = {
-    warn: warn,
-    extend: extend,
-    mergeOptions: mergeOptions,
-    defineReactive: defineReactive
+  var attrs = {
+    create: updateAttrs,
+    update: updateAttrs
   };
 
-  Vue.set = set;
-  Vue.delete = del;
-  Vue.nextTick = nextTick;
-
-  Vue.options = Object.create(null);
-  ASSET_TYPES.forEach(function (type) {
-    Vue.options[type + 's'] = Object.create(null);
-  });
-
-  // this is used to identify the "base" constructor to extend all plain-object
-  // components with in Weex's multi-instance scenarios.
-  Vue.options._base = Vue;
+  /*  */
 
-  extend(Vue.options.components, builtInComponents);
-
-  initUse(Vue);
-  initMixin$1(Vue);
-  initExtend(Vue);
-  initAssetRegisters(Vue);
-}
+  function updateClass (oldVnode, vnode) {
+    var el = vnode.elm;
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+    if (
+      isUndef(data.staticClass) &&
+      isUndef(data.class) && (
+        isUndef(oldData) || (
+          isUndef(oldData.staticClass) &&
+          isUndef(oldData.class)
+        )
+      )
+    ) {
+      return
+    }
 
-initGlobalAPI(Vue$3);
+    var cls = genClassForVnode(vnode);
 
-Object.defineProperty(Vue$3.prototype, '$isServer', {
-  get: isServerRendering
-});
+    // handle transition classes
+    var transitionClass = el._transitionClasses;
+    if (isDef(transitionClass)) {
+      cls = concat(cls, stringifyClass(transitionClass));
+    }
 
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
-  get: function get () {
-    /* istanbul ignore next */
-    return this.$vnode && this.$vnode.ssrContext
+    // set the class
+    if (cls !== el._prevClass) {
+      el.setAttribute('class', cls);
+      el._prevClass = cls;
+    }
   }
-});
 
-Vue$3.version = '2.5.13';
-
-/*  */
+  var klass = {
+    create: updateClass,
+    update: updateClass
+  };
 
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
+  /*  */
+
+  var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+  function parseFilters (exp) {
+    var inSingle = false;
+    var inDouble = false;
+    var inTemplateString = false;
+    var inRegex = false;
+    var curly = 0;
+    var square = 0;
+    var paren = 0;
+    var lastFilterIndex = 0;
+    var c, prev, i, expression, filters;
+
+    for (i = 0; i < exp.length; i++) {
+      prev = c;
+      c = exp.charCodeAt(i);
+      if (inSingle) {
+        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+      } else if (inDouble) {
+        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+      } else if (inTemplateString) {
+        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+      } else if (inRegex) {
+        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+      } else if (
+        c === 0x7C && // pipe
+        exp.charCodeAt(i + 1) !== 0x7C &&
+        exp.charCodeAt(i - 1) !== 0x7C &&
+        !curly && !square && !paren
+      ) {
+        if (expression === undefined) {
+          // first filter, end of expression
+          lastFilterIndex = i + 1;
+          expression = exp.slice(0, i).trim();
+        } else {
+          pushFilter();
+        }
+      } else {
+        switch (c) {
+          case 0x22: inDouble = true; break         // "
+          case 0x27: inSingle = true; break         // '
+          case 0x60: inTemplateString = true; break // `
+          case 0x28: paren++; break                 // (
+          case 0x29: paren--; break                 // )
+          case 0x5B: square++; break                // [
+          case 0x5D: square--; break                // ]
+          case 0x7B: curly++; break                 // {
+          case 0x7D: curly--; break                 // }
+        }
+        if (c === 0x2f) { // /
+          var j = i - 1;
+          var p = (void 0);
+          // find first non-whitespace prev char
+          for (; j >= 0; j--) {
+            p = exp.charAt(j);
+            if (p !== ' ') { break }
+          }
+          if (!p || !validDivisionCharRE.test(p)) {
+            inRegex = true;
+          }
+        }
+      }
+    }
 
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
+    if (expression === undefined) {
+      expression = exp.slice(0, i).trim();
+    } else if (lastFilterIndex !== 0) {
+      pushFilter();
+    }
 
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+    function pushFilter () {
+      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+      lastFilterIndex = i + 1;
+    }
 
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
+    if (filters) {
+      for (i = 0; i < filters.length; i++) {
+        expression = wrapFilter(expression, filters[i]);
+      }
+    }
 
-var xlinkNS = 'http://www.w3.org/1999/xlink';
+    return expression
+  }
 
-var isXlink = function (name) {
-  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-};
+  function wrapFilter (exp, filter) {
+    var i = filter.indexOf('(');
+    if (i < 0) {
+      // _f: resolveFilter
+      return ("_f(\"" + filter + "\")(" + exp + ")")
+    } else {
+      var name = filter.slice(0, i);
+      var args = filter.slice(i + 1);
+      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+    }
+  }
 
-var getXlinkProp = function (name) {
-  return isXlink(name) ? name.slice(6, name.length) : ''
-};
+  /*  */
 
-var isFalsyAttrValue = function (val) {
-  return val == null || val === false
-};
 
-/*  */
 
-function genClassForVnode (vnode) {
-  var data = vnode.data;
-  var parentNode = vnode;
-  var childNode = vnode;
-  while (isDef(childNode.componentInstance)) {
-    childNode = childNode.componentInstance._vnode;
-    if (childNode && childNode.data) {
-      data = mergeClassData(childNode.data, data);
-    }
-  }
-  while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode && parentNode.data) {
-      data = mergeClassData(data, parentNode.data);
-    }
+  /* eslint-disable no-unused-vars */
+  function baseWarn (msg, range) {
+    console.error(("[Vue compiler]: " + msg));
   }
-  return renderClass(data.staticClass, data.class)
-}
+  /* eslint-enable no-unused-vars */
 
-function mergeClassData (child, parent) {
-  return {
-    staticClass: concat(child.staticClass, parent.staticClass),
-    class: isDef(child.class)
-      ? [child.class, parent.class]
-      : parent.class
+  function pluckModuleFunction (
+    modules,
+    key
+  ) {
+    return modules
+      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+      : []
   }
-}
 
-function renderClass (
-  staticClass,
-  dynamicClass
-) {
-  if (isDef(staticClass) || isDef(dynamicClass)) {
-    return concat(staticClass, stringifyClass(dynamicClass))
+  function addProp (el, name, value, range, dynamic) {
+    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
   }
-  /* istanbul ignore next */
-  return ''
-}
-
-function concat (a, b) {
-  return a ? b ? (a + ' ' + b) : a : (b || '')
-}
 
-function stringifyClass (value) {
-  if (Array.isArray(value)) {
-    return stringifyArray(value)
-  }
-  if (isObject(value)) {
-    return stringifyObject(value)
-  }
-  if (typeof value === 'string') {
-    return value
-  }
-  /* istanbul ignore next */
-  return ''
-}
-
-function stringifyArray (value) {
-  var res = '';
-  var stringified;
-  for (var i = 0, l = value.length; i < l; i++) {
-    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-      if (res) { res += ' '; }
-      res += stringified;
-    }
-  }
-  return res
-}
-
-function stringifyObject (value) {
-  var res = '';
-  for (var key in value) {
-    if (value[key]) {
-      if (res) { res += ' '; }
-      res += key;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var namespaceMap = {
-  svg: 'http://www.w3.org/2000/svg',
-  math: 'http://www.w3.org/1998/Math/MathML'
-};
-
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
-
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
-
-var isPreTag = function (tag) { return tag === 'pre'; };
-
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
-
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
-  }
-}
-
-var unknownElementCache = Object.create(null);
-function isUnknownElement (tag) {
-  /* istanbul ignore if */
-  if (!inBrowser) {
-    return true
-  }
-  if (isReservedTag(tag)) {
-    return false
+  function addAttr (el, name, value, range, dynamic) {
+    var attrs = dynamic
+      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+      : (el.attrs || (el.attrs = []));
+    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
   }
-  tag = tag.toLowerCase();
-  /* istanbul ignore if */
-  if (unknownElementCache[tag] != null) {
-    return unknownElementCache[tag]
-  }
-  var el = document.createElement(tag);
-  if (tag.indexOf('-') > -1) {
-    // http://stackoverflow.com/a/28210364/1070244
-    return (unknownElementCache[tag] = (
-      el.constructor === window.HTMLUnknownElement ||
-      el.constructor === window.HTMLElement
-    ))
-  } else {
-    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+
+  // add a raw attr (use this in preTransforms)
+  function addRawAttr (el, name, value, range) {
+    el.attrsMap[name] = value;
+    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
   }
-}
 
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+  function addDirective (
+    el,
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers,
+    range
+  ) {
+    (el.directives || (el.directives = [])).push(rangeSetItem({
+      name: name,
+      rawName: rawName,
+      value: value,
+      arg: arg,
+      isDynamicArg: isDynamicArg,
+      modifiers: modifiers
+    }, range));
+    el.plain = false;
+  }
 
-/*  */
+  function prependModifierMarker (symbol, name, dynamic) {
+    return dynamic
+      ? ("_p(" + name + ",\"" + symbol + "\")")
+      : symbol + name // mark the event as captured
+  }
 
-/**
- * Query an element selector if it's not an element already.
- */
-function query (el) {
-  if (typeof el === 'string') {
-    var selected = document.querySelector(el);
-    if (!selected) {
-      "development" !== 'production' && warn(
-        'Cannot find element: ' + el
+  function addHandler (
+    el,
+    name,
+    value,
+    modifiers,
+    important,
+    warn,
+    range,
+    dynamic
+  ) {
+    modifiers = modifiers || emptyObject;
+    // warn prevent and passive modifier
+    /* istanbul ignore if */
+    if (
+      warn &&
+      modifiers.prevent && modifiers.passive
+    ) {
+      warn(
+        'passive and prevent can\'t be used together. ' +
+        'Passive handler can\'t prevent default event.',
+        range
       );
-      return document.createElement('div')
     }
-    return selected
-  } else {
-    return el
-  }
-}
 
-/*  */
-
-function createElement$1 (tagName, vnode) {
-  var elm = document.createElement(tagName);
-  if (tagName !== 'select') {
-    return elm
-  }
-  // false or null will remove the attribute but undefined will not
-  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
-    elm.setAttribute('multiple', 'multiple');
-  }
-  return elm
-}
-
-function createElementNS (namespace, tagName) {
-  return document.createElementNS(namespaceMap[namespace], tagName)
-}
-
-function createTextNode (text) {
-  return document.createTextNode(text)
-}
-
-function createComment (text) {
-  return document.createComment(text)
-}
-
-function insertBefore (parentNode, newNode, referenceNode) {
-  parentNode.insertBefore(newNode, referenceNode);
-}
-
-function removeChild (node, child) {
-  node.removeChild(child);
-}
-
-function appendChild (node, child) {
-  node.appendChild(child);
-}
-
-function parentNode (node) {
-  return node.parentNode
-}
-
-function nextSibling (node) {
-  return node.nextSibling
-}
-
-function tagName (node) {
-  return node.tagName
-}
-
-function setTextContent (node, text) {
-  node.textContent = text;
-}
-
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
-}
-
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
-});
-
-/*  */
-
-var ref = {
-  create: function create (_, vnode) {
-    registerRef(vnode);
-  },
-  update: function update (oldVnode, vnode) {
-    if (oldVnode.data.ref !== vnode.data.ref) {
-      registerRef(oldVnode, true);
-      registerRef(vnode);
+    // normalize click.right and click.middle since they don't actually fire
+    // this is technically browser-specific, but at least for now browsers are
+    // the only target envs that have right/middle clicks.
+    if (modifiers.right) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'contextmenu';
+        delete modifiers.right;
+      }
+    } else if (modifiers.middle) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'mouseup';
+      }
     }
-  },
-  destroy: function destroy (vnode) {
-    registerRef(vnode, true);
-  }
-};
-
-function registerRef (vnode, isRemoval) {
-  var key = vnode.data.ref;
-  if (!key) { return }
 
-  var vm = vnode.context;
-  var ref = vnode.componentInstance || vnode.elm;
-  var refs = vm.$refs;
-  if (isRemoval) {
-    if (Array.isArray(refs[key])) {
-      remove(refs[key], ref);
-    } else if (refs[key] === ref) {
-      refs[key] = undefined;
+    // check capture modifier
+    if (modifiers.capture) {
+      delete modifiers.capture;
+      name = prependModifierMarker('!', name, dynamic);
     }
-  } else {
-    if (vnode.data.refInFor) {
-      if (!Array.isArray(refs[key])) {
-        refs[key] = [ref];
-      } else if (refs[key].indexOf(ref) < 0) {
-        // $flow-disable-line
-        refs[key].push(ref);
-      }
-    } else {
-      refs[key] = ref;
+    if (modifiers.once) {
+      delete modifiers.once;
+      name = prependModifierMarker('~', name, dynamic);
+    }
+    /* istanbul ignore if */
+    if (modifiers.passive) {
+      delete modifiers.passive;
+      name = prependModifierMarker('&', name, dynamic);
     }
-  }
-}
 
-/**
- * Virtual DOM patching algorithm based on Snabbdom by
- * Simon Friis Vindum (@paldepind)
- * Licensed under the MIT License
- * https://github.com/paldepind/snabbdom/blob/master/LICENSE
- *
- * modified by Evan You (@yyx990803)
- *
- * Not type-checking this because this file is perf-critical and the cost
- * of making flow understand it is not worth it.
- */
+    var events;
+    if (modifiers.native) {
+      delete modifiers.native;
+      events = el.nativeEvents || (el.nativeEvents = {});
+    } else {
+      events = el.events || (el.events = {});
+    }
 
-var emptyNode = new VNode('', {}, []);
-
-var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
-
-function sameVnode (a, b) {
-  return (
-    a.key === b.key && (
-      (
-        a.tag === b.tag &&
-        a.isComment === b.isComment &&
-        isDef(a.data) === isDef(b.data) &&
-        sameInputType(a, b)
-      ) || (
-        isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
-        isUndef(b.asyncFactory.error)
-      )
-    )
-  )
-}
+    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+    if (modifiers !== emptyObject) {
+      newHandler.modifiers = modifiers;
+    }
 
-function sameInputType (a, b) {
-  if (a.tag !== 'input') { return true }
-  var i;
-  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-}
+    var handlers = events[name];
+    /* istanbul ignore if */
+    if (Array.isArray(handlers)) {
+      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+    } else if (handlers) {
+      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+    } else {
+      events[name] = newHandler;
+    }
 
-function createKeyToOldIdx (children, beginIdx, endIdx) {
-  var i, key;
-  var map = {};
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) { map[key] = i; }
+    el.plain = false;
   }
-  return map
-}
 
-function createPatchFunction (backend) {
-  var i, j;
-  var cbs = {};
-
-  var modules = backend.modules;
-  var nodeOps = backend.nodeOps;
+  function getRawBindingAttr (
+    el,
+    name
+  ) {
+    return el.rawAttrsMap[':' + name] ||
+      el.rawAttrsMap['v-bind:' + name] ||
+      el.rawAttrsMap[name]
+  }
 
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (isDef(modules[j][hooks[i]])) {
-        cbs[hooks[i]].push(modules[j][hooks[i]]);
+  function getBindingAttr (
+    el,
+    name,
+    getStatic
+  ) {
+    var dynamicValue =
+      getAndRemoveAttr(el, ':' + name) ||
+      getAndRemoveAttr(el, 'v-bind:' + name);
+    if (dynamicValue != null) {
+      return parseFilters(dynamicValue)
+    } else if (getStatic !== false) {
+      var staticValue = getAndRemoveAttr(el, name);
+      if (staticValue != null) {
+        return JSON.stringify(staticValue)
       }
     }
   }
 
-  function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
-  }
-
-  function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
-        removeNode(childElm);
+  // note: this only removes the attr from the Array (attrsList) so that it
+  // doesn't get processed by processAttrs.
+  // By default it does NOT remove it from the map (attrsMap) because the map is
+  // needed during codegen.
+  function getAndRemoveAttr (
+    el,
+    name,
+    removeFromMap
+  ) {
+    var val;
+    if ((val = el.attrsMap[name]) != null) {
+      var list = el.attrsList;
+      for (var i = 0, l = list.length; i < l; i++) {
+        if (list[i].name === name) {
+          list.splice(i, 1);
+          break
+        }
       }
     }
-    remove.listeners = listeners;
-    return remove
-  }
-
-  function removeNode (el) {
-    var parent = nodeOps.parentNode(el);
-    // element may have already been removed due to v-html / v-text
-    if (isDef(parent)) {
-      nodeOps.removeChild(parent, el);
+    if (removeFromMap) {
+      delete el.attrsMap[name];
     }
+    return val
   }
 
-  function isUnknownElement$$1 (vnode, inVPre) {
-    return (
-      !inVPre &&
-      !vnode.ns &&
-      !(
-        config.ignoredElements.length &&
-        config.ignoredElements.some(function (ignore) {
-          return isRegExp(ignore)
-            ? ignore.test(vnode.tag)
-            : ignore === vnode.tag
-        })
-      ) &&
-      config.isUnknownElement(vnode.tag)
-    )
-  }
-
-  var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
-    vnode.isRootInsert = !nested; // for transition enter check
-    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
-      return
-    }
-
-    var data = vnode.data;
-    var children = vnode.children;
-    var tag = vnode.tag;
-    if (isDef(tag)) {
-      {
-        if (data && data.pre) {
-          creatingElmInVPre++;
-        }
-        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
-          warn(
-            'Unknown custom element: <' + tag + '> - did you ' +
-            'register the component correctly? For recursive components, ' +
-            'make sure to provide the "name" option.',
-            vnode.context
-          );
-        }
-      }
-      vnode.elm = vnode.ns
-        ? nodeOps.createElementNS(vnode.ns, tag)
-        : nodeOps.createElement(tag, vnode);
-      setScope(vnode);
-
-      /* istanbul ignore if */
-      {
-        createChildren(vnode, children, insertedVnodeQueue);
-        if (isDef(data)) {
-          invokeCreateHooks(vnode, insertedVnodeQueue);
-        }
-        insert(parentElm, vnode.elm, refElm);
-      }
-
-      if ("development" !== 'production' && data && data.pre) {
-        creatingElmInVPre--;
+  function getAndRemoveAttrByRegex (
+    el,
+    name
+  ) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      var attr = list[i];
+      if (name.test(attr.name)) {
+        list.splice(i, 1);
+        return attr
       }
-    } else if (isTrue(vnode.isComment)) {
-      vnode.elm = nodeOps.createComment(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    } else {
-      vnode.elm = nodeOps.createTextNode(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
     }
   }
 
-  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i = vnode.data;
-    if (isDef(i)) {
-      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
-      if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
+  function rangeSetItem (
+    item,
+    range
+  ) {
+    if (range) {
+      if (range.start != null) {
+        item.start = range.start;
       }
-      // after calling the init hook, if the vnode is a child component
-      // it should've created a child instance and mounted it. the child
-      // component also has set the placeholder vnode's elm.
-      // in that case we can just return the element and be done.
-      if (isDef(vnode.componentInstance)) {
-        initComponent(vnode, insertedVnodeQueue);
-        if (isTrue(isReactivated)) {
-          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
-        }
-        return true
+      if (range.end != null) {
+        item.end = range.end;
       }
     }
+    return item
   }
 
-  function initComponent (vnode, insertedVnodeQueue) {
-    if (isDef(vnode.data.pendingInsert)) {
-      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
-      vnode.data.pendingInsert = null;
+  /*  */
+
+  /**
+   * Cross-platform code generation for component v-model
+   */
+  function genComponentModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var ref = modifiers || {};
+    var number = ref.number;
+    var trim = ref.trim;
+
+    var baseValueExpression = '$$v';
+    var valueExpression = baseValueExpression;
+    if (trim) {
+      valueExpression =
+        "(typeof " + baseValueExpression + " === 'string'" +
+        "? " + baseValueExpression + ".trim()" +
+        ": " + baseValueExpression + ")";
     }
-    vnode.elm = vnode.componentInstance.$el;
-    if (isPatchable(vnode)) {
-      invokeCreateHooks(vnode, insertedVnodeQueue);
-      setScope(vnode);
-    } else {
-      // empty component root.
-      // skip all element-related modules except for ref (#3455)
-      registerRef(vnode);
-      // make sure to invoke the insert hook
-      insertedVnodeQueue.push(vnode);
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
     }
+    var assignment = genAssignmentCode(value, valueExpression);
+
+    el.model = {
+      value: ("(" + value + ")"),
+      expression: JSON.stringify(value),
+      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+    };
   }
 
-  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i;
-    // hack for #4339: a reactivated component with inner transition
-    // does not trigger because the inner node's created hooks are not called
-    // again. It's not ideal to involve module-specific logic in here but
-    // there doesn't seem to be a better way to do it.
-    var innerNode = vnode;
-    while (innerNode.componentInstance) {
-      innerNode = innerNode.componentInstance._vnode;
-      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
-        for (i = 0; i < cbs.activate.length; ++i) {
-          cbs.activate[i](emptyNode, innerNode);
-        }
-        insertedVnodeQueue.push(innerNode);
-        break
-      }
+  /**
+   * Cross-platform codegen helper for generating v-model value assignment code.
+   */
+  function genAssignmentCode (
+    value,
+    assignment
+  ) {
+    var res = parseModel(value);
+    if (res.key === null) {
+      return (value + "=" + assignment)
+    } else {
+      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
     }
-    // unlike a newly created component,
-    // a reactivated keep-alive component doesn't insert itself
-    insert(parentElm, vnode.elm, refElm);
   }
 
-  function insert (parent, elm, ref$$1) {
-    if (isDef(parent)) {
-      if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
-          nodeOps.insertBefore(parent, elm, ref$$1);
+  /**
+   * Parse a v-model expression into a base path and a final key segment.
+   * Handles both dot-path and possible square brackets.
+   *
+   * Possible cases:
+   *
+   * - test
+   * - test[key]
+   * - test[test1[key]]
+   * - test["a"][key]
+   * - xxx.test[a[a].test1[key]]
+   * - test.xxx.a["asa"][test1[key]]
+   *
+   */
+
+  var len, str, chr, index$1, expressionPos, expressionEndPos;
+
+
+
+  function parseModel (val) {
+    // Fix https://github.com/vuejs/vue/pull/7730
+    // allow v-model="obj.val " (trailing whitespace)
+    val = val.trim();
+    len = val.length;
+
+    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+      index$1 = val.lastIndexOf('.');
+      if (index$1 > -1) {
+        return {
+          exp: val.slice(0, index$1),
+          key: '"' + val.slice(index$1 + 1) + '"'
         }
       } else {
-        nodeOps.appendChild(parent, elm);
+        return {
+          exp: val,
+          key: null
+        }
       }
     }
-  }
 
-  function createChildren (vnode, children, insertedVnodeQueue) {
-    if (Array.isArray(children)) {
-      {
-        checkDuplicateKeys(children);
-      }
-      for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+    str = val;
+    index$1 = expressionPos = expressionEndPos = 0;
+
+    while (!eof()) {
+      chr = next();
+      /* istanbul ignore if */
+      if (isStringStart(chr)) {
+        parseString(chr);
+      } else if (chr === 0x5B) {
+        parseBracket(chr);
       }
-    } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
     }
-  }
 
-  function isPatchable (vnode) {
-    while (vnode.componentInstance) {
-      vnode = vnode.componentInstance._vnode;
+    return {
+      exp: val.slice(0, expressionPos),
+      key: val.slice(expressionPos + 1, expressionEndPos)
     }
-    return isDef(vnode.tag)
   }
 
-  function invokeCreateHooks (vnode, insertedVnodeQueue) {
-    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-      cbs.create[i$1](emptyNode, vnode);
-    }
-    i = vnode.data.hook; // Reuse variable
-    if (isDef(i)) {
-      if (isDef(i.create)) { i.create(emptyNode, vnode); }
-      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
-    }
+  function next () {
+    return str.charCodeAt(++index$1)
   }
 
-  // set scope id attribute for scoped CSS.
-  // this is implemented as a special case to avoid the overhead
-  // of going through the normal attribute patching process.
-  function setScope (vnode) {
-    var i;
-    if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    } else {
-      var ancestor = vnode;
-      while (ancestor) {
-        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
-        }
-        ancestor = ancestor.parent;
-      }
-    }
-    // for slot content they should also get the scopeId from the host instance.
-    if (isDef(i = activeInstance) &&
-      i !== vnode.context &&
-      i !== vnode.fnContext &&
-      isDef(i = i.$options._scopeId)
-    ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    }
+  function eof () {
+    return index$1 >= len
   }
 
-  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
-    }
+  function isStringStart (chr) {
+    return chr === 0x22 || chr === 0x27
   }
 
-  function invokeDestroyHook (vnode) {
-    var i, j;
-    var data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
-      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
-    }
-    if (isDef(i = vnode.children)) {
-      for (j = 0; j < vnode.children.length; ++j) {
-        invokeDestroyHook(vnode.children[j]);
+  function parseBracket (chr) {
+    var inBracket = 1;
+    expressionPos = index$1;
+    while (!eof()) {
+      chr = next();
+      if (isStringStart(chr)) {
+        parseString(chr);
+        continue
       }
-    }
-  }
-
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.tag)) {
-          removeAndInvokeRemoveHook(ch);
-          invokeDestroyHook(ch);
-        } else { // Text node
-          removeNode(ch.elm);
-        }
+      if (chr === 0x5B) { inBracket++; }
+      if (chr === 0x5D) { inBracket--; }
+      if (inBracket === 0) {
+        expressionEndPos = index$1;
+        break
       }
     }
   }
 
-  function removeAndInvokeRemoveHook (vnode, rm) {
-    if (isDef(rm) || isDef(vnode.data)) {
-      var i;
-      var listeners = cbs.remove.length + 1;
-      if (isDef(rm)) {
-        // we have a recursively passed down rm callback
-        // increase the listeners count
-        rm.listeners += listeners;
-      } else {
-        // directly removing
-        rm = createRmCb(vnode.elm, listeners);
-      }
-      // recursively invoke hooks on child component root node
-      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
-        removeAndInvokeRemoveHook(i, rm);
-      }
-      for (i = 0; i < cbs.remove.length; ++i) {
-        cbs.remove[i](vnode, rm);
-      }
-      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
-        i(vnode, rm);
-      } else {
-        rm();
+  function parseString (chr) {
+    var stringQuote = chr;
+    while (!eof()) {
+      chr = next();
+      if (chr === stringQuote) {
+        break
       }
-    } else {
-      removeNode(vnode.elm);
     }
   }
 
-  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
-    var oldStartIdx = 0;
-    var newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+  /*  */
 
-    // removeOnly is a special flag used only by <transition-group>
-    // to ensure removed elements stay in correct relative positions
-    // during leaving transitions
-    var canMove = !removeOnly;
+  var warn$1;
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+  var CHECKBOX_RADIO_TOKEN = '__c';
+
+  function model (
+    el,
+    dir,
+    _warn
+  ) {
+    warn$1 = _warn;
+    var value = dir.value;
+    var modifiers = dir.modifiers;
+    var tag = el.tag;
+    var type = el.attrsMap.type;
 
     {
-      checkDuplicateKeys(newCh);
-    }
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-        oldEndVnode = oldCh[--oldEndIdx];
-      } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
-        oldStartVnode = oldCh[++oldStartIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else {
-        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
-        idxInOld = isDef(newStartVnode.key)
-          ? oldKeyToIdx[newStartVnode.key]
-          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
-        if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-        } else {
-          vnodeToMove = oldCh[idxInOld];
-          if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
-          } else {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-          }
-        }
-        newStartVnode = newCh[++newStartIdx];
+      // inputs with type="file" are read only and setting the input's
+      // value will throw an error.
+      if (tag === 'input' && type === 'file') {
+        warn$1(
+          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+          "File inputs are read only. Use a v-on:change listener instead.",
+          el.rawAttrsMap['v-model']
+        );
       }
     }
-    if (oldStartIdx > oldEndIdx) {
-      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+
+    if (el.component) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else if (tag === 'select') {
+      genSelect(el, value, modifiers);
+    } else if (tag === 'input' && type === 'checkbox') {
+      genCheckboxModel(el, value, modifiers);
+    } else if (tag === 'input' && type === 'radio') {
+      genRadioModel(el, value, modifiers);
+    } else if (tag === 'input' || tag === 'textarea') {
+      genDefaultModel(el, value, modifiers);
+    } else if (!config.isReservedTag(tag)) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else {
+      warn$1(
+        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+        "v-model is not supported on this element type. " +
+        'If you are working with contenteditable, it\'s recommended to ' +
+        'wrap a library dedicated for that purpose inside a custom component.',
+        el.rawAttrsMap['v-model']
+      );
     }
+
+    // ensure runtime directive metadata
+    return true
   }
 
-  function checkDuplicateKeys (children) {
-    var seenKeys = {};
-    for (var i = 0; i < children.length; i++) {
-      var vnode = children[i];
-      var key = vnode.key;
-      if (isDef(key)) {
-        if (seenKeys[key]) {
-          warn(
-            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
-            vnode.context
-          );
-        } else {
-          seenKeys[key] = true;
-        }
-      }
-    }
+  function genCheckboxModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+    addProp(el, 'checked',
+      "Array.isArray(" + value + ")" +
+      "?_i(" + value + "," + valueBinding + ")>-1" + (
+        trueValueBinding === 'true'
+          ? (":(" + value + ")")
+          : (":_q(" + value + "," + trueValueBinding + ")")
+      )
+    );
+    addHandler(el, 'change',
+      "var $$a=" + value + "," +
+          '$$el=$event.target,' +
+          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+      'if(Array.isArray($$a)){' +
+        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+            '$$i=_i($$a,$$v);' +
+        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+      null, true
+    );
   }
 
-  function findIdxInOld (node, oldCh, start, end) {
-    for (var i = start; i < end; i++) {
-      var c = oldCh[i];
-      if (isDef(c) && sameVnode(node, c)) { return i }
-    }
+  function genRadioModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
-    if (oldVnode === vnode) {
-      return
-    }
+  function genSelect (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var selectedVal = "Array.prototype.filter" +
+      ".call($event.target.options,function(o){return o.selected})" +
+      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+      "return " + (number ? '_n(val)' : 'val') + "})";
+
+    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+    var code = "var $$selectedVal = " + selectedVal + ";";
+    code = code + " " + (genAssignmentCode(value, assignment));
+    addHandler(el, 'change', code, null, true);
+  }
 
-    var elm = vnode.elm = oldVnode.elm;
+  function genDefaultModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var type = el.attrsMap.type;
 
-    if (isTrue(oldVnode.isAsyncPlaceholder)) {
-      if (isDef(vnode.asyncFactory.resolved)) {
-        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
-      } else {
-        vnode.isAsyncPlaceholder = true;
+    // warn if v-bind:value conflicts with v-model
+    // except for inputs with v-bind:type
+    {
+      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+      if (value$1 && !typeBinding) {
+        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+        warn$1(
+          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+          'because the latter already expands to a value binding internally',
+          el.rawAttrsMap[binding]
+        );
       }
-      return
     }
 
-    // reuse element for static trees.
-    // note we only do this if the vnode is cloned -
-    // if the new node is not cloned it means the render functions have been
-    // reset by the hot-reload-api and we need to do a proper re-render.
-    if (isTrue(vnode.isStatic) &&
-      isTrue(oldVnode.isStatic) &&
-      vnode.key === oldVnode.key &&
-      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
-    ) {
-      vnode.componentInstance = oldVnode.componentInstance;
-      return
-    }
+    var ref = modifiers || {};
+    var lazy = ref.lazy;
+    var number = ref.number;
+    var trim = ref.trim;
+    var needCompositionGuard = !lazy && type !== 'range';
+    var event = lazy
+      ? 'change'
+      : type === 'range'
+        ? RANGE_TOKEN
+        : 'input';
 
-    var i;
-    var data = vnode.data;
-    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-      i(oldVnode, vnode);
+    var valueExpression = '$event.target.value';
+    if (trim) {
+      valueExpression = "$event.target.value.trim()";
     }
-
-    var oldCh = oldVnode.children;
-    var ch = vnode.children;
-    if (isDef(data) && isPatchable(vnode)) {
-      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
-      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
     }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
-      } else if (isDef(ch)) {
-        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      } else if (isDef(oldVnode.text)) {
-        nodeOps.setTextContent(elm, '');
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      nodeOps.setTextContent(elm, vnode.text);
+
+    var code = genAssignmentCode(value, valueExpression);
+    if (needCompositionGuard) {
+      code = "if($event.target.composing)return;" + code;
     }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+
+    addProp(el, 'value', ("(" + value + ")"));
+    addHandler(el, event, code, null, true);
+    if (trim || number) {
+      addHandler(el, 'blur', '$forceUpdate()');
     }
   }
 
-  function invokeInsertHook (vnode, queue, initial) {
-    // delay insert hooks for component root nodes, invoke them after the
-    // element is really inserted
-    if (isTrue(initial) && isDef(vnode.parent)) {
-      vnode.parent.data.pendingInsert = queue;
-    } else {
-      for (var i = 0; i < queue.length; ++i) {
-        queue[i].data.hook.insert(queue[i]);
-      }
+  /*  */
+
+  // normalize v-model event tokens that can only be determined at runtime.
+  // it's important to place the event as the first in the array because
+  // the whole point is ensuring the v-model callback gets called before
+  // user-attached handlers.
+  function normalizeEvents (on) {
+    /* istanbul ignore if */
+    if (isDef(on[RANGE_TOKEN])) {
+      // IE input[type=range] only supports `change` event
+      var event = isIE ? 'change' : 'input';
+      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+      delete on[RANGE_TOKEN];
+    }
+    // This was originally intended to fix #4521 but no longer necessary
+    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+    /* istanbul ignore if */
+    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+      delete on[CHECKBOX_RADIO_TOKEN];
     }
   }
 
-  var hydrationBailed = false;
-  // list of modules that can skip create hook during hydration because they
-  // are already rendered on the client or has no need for initialization
-  // Note: style is excluded because it relies on initial clone for future
-  // deep updates (#7063).
-  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
-
-  // Note: this is a browser-only function so we can assume elms are DOM nodes.
-  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
-    var i;
-    var tag = vnode.tag;
-    var data = vnode.data;
-    var children = vnode.children;
-    inVPre = inVPre || (data && data.pre);
-    vnode.elm = elm;
+  var target$1;
 
-    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
-      vnode.isAsyncPlaceholder = true;
-      return true
-    }
-    // assert node match
-    {
-      if (!assertNodeMatch(elm, vnode, inVPre)) {
-        return false
-      }
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
-      if (isDef(i = vnode.componentInstance)) {
-        // child component. it should have hydrated its own tree.
-        initComponent(vnode, insertedVnodeQueue);
-        return true
+  function createOnceHandler$1 (event, handler, capture) {
+    var _target = target$1; // save current target element in closure
+    return function onceHandler () {
+      var res = handler.apply(null, arguments);
+      if (res !== null) {
+        remove$2(event, onceHandler, capture, _target);
       }
     }
-    if (isDef(tag)) {
-      if (isDef(children)) {
-        // empty element, allow client to pick up and populate children
-        if (!elm.hasChildNodes()) {
-          createChildren(vnode, children, insertedVnodeQueue);
-        } else {
-          // v-html and domProps: innerHTML
-          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
-            if (i !== elm.innerHTML) {
-              /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('server innerHTML: ', i);
-                console.warn('client innerHTML: ', elm.innerHTML);
-              }
-              return false
-            }
-          } else {
-            // iterate and compare children lists
-            var childrenMatch = true;
-            var childNode = elm.firstChild;
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
-                childrenMatch = false;
-                break
-              }
-              childNode = childNode.nextSibling;
-            }
-            // if childNode is not null, it means the actual childNodes list is
-            // longer than the virtual children list.
-            if (!childrenMatch || childNode) {
-              /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
-              }
-              return false
-            }
-          }
-        }
-      }
-      if (isDef(data)) {
-        var fullInvoke = false;
-        for (var key in data) {
-          if (!isRenderedModule(key)) {
-            fullInvoke = true;
-            invokeCreateHooks(vnode, insertedVnodeQueue);
-            break
-          }
-        }
-        if (!fullInvoke && data['class']) {
-          // ensure collecting deps for deep class bindings for future updates
-          traverse(data['class']);
+  }
+
+  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+  // implementation and does not fire microtasks in between event propagation, so
+  // safe to exclude.
+  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+  function add$1 (
+    name,
+    handler,
+    capture,
+    passive
+  ) {
+    // async edge case #6566: inner click event triggers patch, event handler
+    // attached to outer element during patch, and triggered again. This
+    // happens because browsers fire microtask ticks between event propagation.
+    // the solution is simple: we save the timestamp when a handler is attached,
+    // and the handler would only fire if the event passed to it was fired
+    // AFTER it was attached.
+    if (useMicrotaskFix) {
+      var attachedTimestamp = currentFlushTimestamp;
+      var original = handler;
+      handler = original._wrapper = function (e) {
+        if (
+          // no bubbling, should always fire.
+          // this is just a safety net in case event.timeStamp is unreliable in
+          // certain weird environments...
+          e.target === e.currentTarget ||
+          // event is fired after handler attachment
+          e.timeStamp >= attachedTimestamp ||
+          // bail for environments that have buggy event.timeStamp implementations
+          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+          // #9681 QtWebEngine event.timeStamp is negative value
+          e.timeStamp <= 0 ||
+          // #9448 bail if event is fired in another document in a multi-page
+          // electron/nw.js app, since event.timeStamp will be using a different
+          // starting reference
+          e.target.ownerDocument !== document
+        ) {
+          return original.apply(this, arguments)
         }
-      }
-    } else if (elm.data !== vnode.text) {
-      elm.data = vnode.text;
+      };
     }
-    return true
+    target$1.addEventListener(
+      name,
+      handler,
+      supportsPassive
+        ? { capture: capture, passive: passive }
+        : capture
+    );
   }
 
-  function assertNodeMatch (node, vnode, inVPre) {
-    if (isDef(vnode.tag)) {
-      return vnode.tag.indexOf('vue-component') === 0 || (
-        !isUnknownElement$$1(vnode, inVPre) &&
-        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
-      )
-    } else {
-      return node.nodeType === (vnode.isComment ? 8 : 3)
-    }
+  function remove$2 (
+    name,
+    handler,
+    capture,
+    _target
+  ) {
+    (_target || target$1).removeEventListener(
+      name,
+      handler._wrapper || handler,
+      capture
+    );
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
-    if (isUndef(vnode)) {
-      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+  function updateDOMListeners (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
       return
     }
+    var on = vnode.data.on || {};
+    var oldOn = oldVnode.data.on || {};
+    target$1 = vnode.elm;
+    normalizeEvents(on);
+    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+    target$1 = undefined;
+  }
 
-    var isInitialPatch = false;
-    var insertedVnodeQueue = [];
-
-    if (isUndef(oldVnode)) {
-      // empty mount (likely as component), create new root element
-      isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
-    } else {
-      var isRealElement = isDef(oldVnode.nodeType);
-      if (!isRealElement && sameVnode(oldVnode, vnode)) {
-        // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
-      } else {
-        if (isRealElement) {
-          // mounting to a real element
-          // check if this is server-rendered content and if we can perform
-          // a successful hydration.
-          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
-            oldVnode.removeAttribute(SSR_ATTR);
-            hydrating = true;
-          }
-          if (isTrue(hydrating)) {
-            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
-              invokeInsertHook(vnode, insertedVnodeQueue, true);
-              return oldVnode
-            } else {
-              warn(
-                'The client-side rendered virtual DOM tree is not matching ' +
-                'server-rendered content. This is likely caused by incorrect ' +
-                'HTML markup, for example nesting block-level elements inside ' +
-                '<p>, or missing <tbody>. Bailing hydration and performing ' +
-                'full client-side render.'
-              );
-            }
-          }
-          // either not server-rendered, or hydration failed.
-          // create an empty node and replace it
-          oldVnode = emptyNodeAt(oldVnode);
-        }
+  var events = {
+    create: updateDOMListeners,
+    update: updateDOMListeners
+  };
 
-        // replacing existing element
-        var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
+  /*  */
 
-        // create new node
-        createElm(
-          vnode,
-          insertedVnodeQueue,
-          // extremely rare edge case: do not insert if old element is in a
-          // leaving transition. Only happens when combining transition +
-          // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
-          nodeOps.nextSibling(oldElm)
-        );
+  var svgContainer;
 
-        // update parent placeholder node element, recursively
-        if (isDef(vnode.parent)) {
-          var ancestor = vnode.parent;
-          var patchable = isPatchable(vnode);
-          while (ancestor) {
-            for (var i = 0; i < cbs.destroy.length; ++i) {
-              cbs.destroy[i](ancestor);
-            }
-            ancestor.elm = vnode.elm;
-            if (patchable) {
-              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                cbs.create[i$1](emptyNode, ancestor);
-              }
-              // #6513
-              // invoke insert hooks that may have been merged by create hooks.
-              // e.g. for directives that uses the "inserted" hook.
-              var insert = ancestor.data.hook.insert;
-              if (insert.merged) {
-                // start at index 1 to avoid re-invoking component mounted hook
-                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
-                  insert.fns[i$2]();
-                }
-              }
-            } else {
-              registerRef(ancestor);
-            }
-            ancestor = ancestor.parent;
-          }
+  function updateDOMProps (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+      return
+    }
+    var key, cur;
+    var elm = vnode.elm;
+    var oldProps = oldVnode.data.domProps || {};
+    var props = vnode.data.domProps || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(props.__ob__)) {
+      props = vnode.data.domProps = extend({}, props);
+    }
+
+    for (key in oldProps) {
+      if (!(key in props)) {
+        elm[key] = '';
+      }
+    }
+
+    for (key in props) {
+      cur = props[key];
+      // ignore children if the node has textContent or innerHTML,
+      // as these will throw away existing DOM nodes and cause removal errors
+      // on subsequent patches (#3360)
+      if (key === 'textContent' || key === 'innerHTML') {
+        if (vnode.children) { vnode.children.length = 0; }
+        if (cur === oldProps[key]) { continue }
+        // #6601 work around Chrome version <= 55 bug where single textNode
+        // replaced by innerHTML/textContent retains its parentNode property
+        if (elm.childNodes.length === 1) {
+          elm.removeChild(elm.childNodes[0]);
         }
+      }
 
-        // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
-        } else if (isDef(oldVnode.tag)) {
-          invokeDestroyHook(oldVnode);
+      if (key === 'value' && elm.tagName !== 'PROGRESS') {
+        // store value as _value as well since
+        // non-string values will be stringified
+        elm._value = cur;
+        // avoid resetting cursor position when value is the same
+        var strCur = isUndef(cur) ? '' : String(cur);
+        if (shouldUpdateValue(elm, strCur)) {
+          elm.value = strCur;
+        }
+      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+        // IE doesn't support innerHTML for SVG elements
+        svgContainer = svgContainer || document.createElement('div');
+        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+        var svg = svgContainer.firstChild;
+        while (elm.firstChild) {
+          elm.removeChild(elm.firstChild);
+        }
+        while (svg.firstChild) {
+          elm.appendChild(svg.firstChild);
         }
+      } else if (
+        // skip the update if old and new VDOM state is the same.
+        // `value` is handled separately because the DOM value may be temporarily
+        // out of sync with VDOM state due to focus, composition and modifiers.
+        // This  #4521 by skipping the unnecessary `checked` update.
+        cur !== oldProps[key]
+      ) {
+        // some property updates can throw
+        // e.g. `value` on <progress> w/ non-finite value
+        try {
+          elm[key] = cur;
+        } catch (e) {}
       }
     }
-
-    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
-    return vnode.elm
   }
-}
 
-/*  */
+  // check platforms/web/util/attrs.js acceptValue
 
-var directives = {
-  create: updateDirectives,
-  update: updateDirectives,
-  destroy: function unbindDirectives (vnode) {
-    updateDirectives(vnode, emptyNode);
-  }
-};
 
-function updateDirectives (oldVnode, vnode) {
-  if (oldVnode.data.directives || vnode.data.directives) {
-    _update(oldVnode, vnode);
+  function shouldUpdateValue (elm, checkVal) {
+    return (!elm.composing && (
+      elm.tagName === 'OPTION' ||
+      isNotInFocusAndDirty(elm, checkVal) ||
+      isDirtyWithModifiers(elm, checkVal)
+    ))
   }
-}
-
-function _update (oldVnode, vnode) {
-  var isCreate = oldVnode === emptyNode;
-  var isDestroy = vnode === emptyNode;
-  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
 
-  var dirsWithInsert = [];
-  var dirsWithPostpatch = [];
+  function isNotInFocusAndDirty (elm, checkVal) {
+    // return true when textbox (.number and .trim) loses focus and its value is
+    // not equal to the updated value
+    var notInFocus = true;
+    // #6157
+    // work around IE bug when accessing document.activeElement in an iframe
+    try { notInFocus = document.activeElement !== elm; } catch (e) {}
+    return notInFocus && elm.value !== checkVal
+  }
 
-  var key, oldDir, dir;
-  for (key in newDirs) {
-    oldDir = oldDirs[key];
-    dir = newDirs[key];
-    if (!oldDir) {
-      // new directive, bind
-      callHook$1(dir, 'bind', vnode, oldVnode);
-      if (dir.def && dir.def.inserted) {
-        dirsWithInsert.push(dir);
+  function isDirtyWithModifiers (elm, newVal) {
+    var value = elm.value;
+    var modifiers = elm._vModifiers; // injected by v-model runtime
+    if (isDef(modifiers)) {
+      if (modifiers.number) {
+        return toNumber(value) !== toNumber(newVal)
       }
-    } else {
-      // existing directive, update
-      dir.oldValue = oldDir.value;
-      callHook$1(dir, 'update', vnode, oldVnode);
-      if (dir.def && dir.def.componentUpdated) {
-        dirsWithPostpatch.push(dir);
+      if (modifiers.trim) {
+        return value.trim() !== newVal.trim()
       }
     }
+    return value !== newVal
   }
 
-  if (dirsWithInsert.length) {
-    var callInsert = function () {
-      for (var i = 0; i < dirsWithInsert.length; i++) {
-        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
-      }
-    };
-    if (isCreate) {
-      mergeVNodeHook(vnode, 'insert', callInsert);
-    } else {
-      callInsert();
-    }
-  }
+  var domProps = {
+    create: updateDOMProps,
+    update: updateDOMProps
+  };
 
-  if (dirsWithPostpatch.length) {
-    mergeVNodeHook(vnode, 'postpatch', function () {
-      for (var i = 0; i < dirsWithPostpatch.length; i++) {
-        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+  /*  */
+
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
       }
     });
+    return res
+  });
+
+  // merge static and dynamic style data on the same vnode
+  function normalizeStyleData (data) {
+    var style = normalizeStyleBinding(data.style);
+    // static style is pre-processed into an object during compilation
+    // and is always a fresh object, so it's safe to merge into it
+    return data.staticStyle
+      ? extend(data.staticStyle, style)
+      : style
   }
 
-  if (!isCreate) {
-    for (key in oldDirs) {
-      if (!newDirs[key]) {
-        // no longer present, unbind
-        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
-      }
+  // normalize possible array / string values into Object
+  function normalizeStyleBinding (bindingStyle) {
+    if (Array.isArray(bindingStyle)) {
+      return toObject(bindingStyle)
     }
+    if (typeof bindingStyle === 'string') {
+      return parseStyleText(bindingStyle)
+    }
+    return bindingStyle
   }
-}
 
-var emptyModifiers = Object.create(null);
+  /**
+   * parent component style should be after child's
+   * so that parent component's style could override it
+   */
+  function getStyle (vnode, checkChild) {
+    var res = {};
+    var styleData;
 
-function normalizeDirectives$1 (
-  dirs,
-  vm
-) {
-  var res = Object.create(null);
-  if (!dirs) {
-    // $flow-disable-line
+    if (checkChild) {
+      var childNode = vnode;
+      while (childNode.componentInstance) {
+        childNode = childNode.componentInstance._vnode;
+        if (
+          childNode && childNode.data &&
+          (styleData = normalizeStyleData(childNode.data))
+        ) {
+          extend(res, styleData);
+        }
+      }
+    }
+
+    if ((styleData = normalizeStyleData(vnode.data))) {
+      extend(res, styleData);
+    }
+
+    var parentNode = vnode;
+    while ((parentNode = parentNode.parent)) {
+      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+        extend(res, styleData);
+      }
+    }
     return res
   }
-  var i, dir;
-  for (i = 0; i < dirs.length; i++) {
-    dir = dirs[i];
-    if (!dir.modifiers) {
-      // $flow-disable-line
-      dir.modifiers = emptyModifiers;
+
+  /*  */
+
+  var cssVarRE = /^--/;
+  var importantRE = /\s*!important$/;
+  var setProp = function (el, name, val) {
+    /* istanbul ignore if */
+    if (cssVarRE.test(name)) {
+      el.style.setProperty(name, val);
+    } else if (importantRE.test(val)) {
+      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+    } else {
+      var normalizedName = normalize(name);
+      if (Array.isArray(val)) {
+        // Support values array created by autoprefixer, e.g.
+        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+        // Set them one by one, and the browser will only set those it can recognize
+        for (var i = 0, len = val.length; i < len; i++) {
+          el.style[normalizedName] = val[i];
+        }
+      } else {
+        el.style[normalizedName] = val;
+      }
     }
-    res[getRawDirName(dir)] = dir;
-    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
-  }
-  // $flow-disable-line
-  return res
-}
+  };
 
-function getRawDirName (dir) {
-  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
-}
+  var vendorNames = ['Webkit', 'Moz', 'ms'];
 
-function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
-  var fn = dir.def && dir.def[hook];
-  if (fn) {
-    try {
-      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
-    } catch (e) {
-      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+  var emptyStyle;
+  var normalize = cached(function (prop) {
+    emptyStyle = emptyStyle || document.createElement('div').style;
+    prop = camelize(prop);
+    if (prop !== 'filter' && (prop in emptyStyle)) {
+      return prop
     }
-  }
-}
+    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+    for (var i = 0; i < vendorNames.length; i++) {
+      var name = vendorNames[i] + capName;
+      if (name in emptyStyle) {
+        return name
+      }
+    }
+  });
+
+  function updateStyle (oldVnode, vnode) {
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+
+    if (isUndef(data.staticStyle) && isUndef(data.style) &&
+      isUndef(oldData.staticStyle) && isUndef(oldData.style)
+    ) {
+      return
+    }
+
+    var cur, name;
+    var el = vnode.elm;
+    var oldStaticStyle = oldData.staticStyle;
+    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
 
-var baseModules = [
-  ref,
-  directives
-];
+    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+    var oldStyle = oldStaticStyle || oldStyleBinding;
 
-/*  */
+    var style = normalizeStyleBinding(vnode.data.style) || {};
 
-function updateAttrs (oldVnode, vnode) {
-  var opts = vnode.componentOptions;
-  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-    return
-  }
-  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-    return
-  }
-  var key, cur, old;
-  var elm = vnode.elm;
-  var oldAttrs = oldVnode.data.attrs || {};
-  var attrs = vnode.data.attrs || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(attrs.__ob__)) {
-    attrs = vnode.data.attrs = extend({}, attrs);
-  }
+    // store normalized style under a different key for next diff
+    // make sure to clone it if it's reactive, since the user likely wants
+    // to mutate it.
+    vnode.data.normalizedStyle = isDef(style.__ob__)
+      ? extend({}, style)
+      : style;
+
+    var newStyle = getStyle(vnode, true);
 
-  for (key in attrs) {
-    cur = attrs[key];
-    old = oldAttrs[key];
-    if (old !== cur) {
-      setAttr(elm, key, cur);
+    for (name in oldStyle) {
+      if (isUndef(newStyle[name])) {
+        setProp(el, name, '');
+      }
     }
-  }
-  // #4391: in IE9, setting type can reset value for input[type=radio]
-  // #6666: IE/Edge forces progress value down to 1 before setting a max
-  /* istanbul ignore if */
-  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
-    setAttr(elm, 'value', attrs.value);
-  }
-  for (key in oldAttrs) {
-    if (isUndef(attrs[key])) {
-      if (isXlink(key)) {
-        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
-      } else if (!isEnumeratedAttr(key)) {
-        elm.removeAttribute(key);
+    for (name in newStyle) {
+      cur = newStyle[name];
+      if (cur !== oldStyle[name]) {
+        // ie9 setting to null has no effect, must use empty string
+        setProp(el, name, cur == null ? '' : cur);
       }
     }
   }
-}
 
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
-    // set attribute for blank value
-    // e.g. <option disabled>Select one</option>
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // technically allowfullscreen is a boolean attribute for <iframe>,
-      // but Flash expects a value of "true" when used on <embed> tag
-      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
-        ? 'true'
-        : key;
-      el.setAttribute(key, value);
-    }
-  } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
-  } else if (isXlink(key)) {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
-    } else {
-      el.setAttributeNS(xlinkNS, key, value);
+  var style = {
+    create: updateStyle,
+    update: updateStyle
+  };
+
+  /*  */
+
+  var whitespaceRE = /\s+/;
+
+  /**
+   * Add class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function addClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
     }
-  } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
+
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+      } else {
+        el.classList.add(cls);
+      }
     } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        var blocker = function (e) {
-          e.stopImmediatePropagation();
-          el.removeEventListener('input', blocker);
-        };
-        el.addEventListener('input', blocker);
-        // $flow-disable-line
-        el.__ieph = true; /* IE placeholder patched */
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      if (cur.indexOf(' ' + cls + ' ') < 0) {
+        el.setAttribute('class', (cur + cls).trim());
       }
-      el.setAttribute(key, value);
     }
   }
-}
 
-var attrs = {
-  create: updateAttrs,
-  update: updateAttrs
-};
-
-/*  */
+  /**
+   * Remove class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function removeClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
 
-function updateClass (oldVnode, vnode) {
-  var el = vnode.elm;
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-  if (
-    isUndef(data.staticClass) &&
-    isUndef(data.class) && (
-      isUndef(oldData) || (
-        isUndef(oldData.staticClass) &&
-        isUndef(oldData.class)
-      )
-    )
-  ) {
-    return
-  }
-
-  var cls = genClassForVnode(vnode);
-
-  // handle transition classes
-  var transitionClass = el._transitionClasses;
-  if (isDef(transitionClass)) {
-    cls = concat(cls, stringifyClass(transitionClass));
-  }
-
-  // set the class
-  if (cls !== el._prevClass) {
-    el.setAttribute('class', cls);
-    el._prevClass = cls;
-  }
-}
-
-var klass = {
-  create: updateClass,
-  update: updateClass
-};
-
-/*  */
-
-var validDivisionCharRE = /[\w).+\-_$\]]/;
-
-function parseFilters (exp) {
-  var inSingle = false;
-  var inDouble = false;
-  var inTemplateString = false;
-  var inRegex = false;
-  var curly = 0;
-  var square = 0;
-  var paren = 0;
-  var lastFilterIndex = 0;
-  var c, prev, i, expression, filters;
-
-  for (i = 0; i < exp.length; i++) {
-    prev = c;
-    c = exp.charCodeAt(i);
-    if (inSingle) {
-      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
-    } else if (inDouble) {
-      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
-    } else if (inTemplateString) {
-      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
-    } else if (inRegex) {
-      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
-    } else if (
-      c === 0x7C && // pipe
-      exp.charCodeAt(i + 1) !== 0x7C &&
-      exp.charCodeAt(i - 1) !== 0x7C &&
-      !curly && !square && !paren
-    ) {
-      if (expression === undefined) {
-        // first filter, end of expression
-        lastFilterIndex = i + 1;
-        expression = exp.slice(0, i).trim();
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
       } else {
-        pushFilter();
+        el.classList.remove(cls);
       }
-    } else {
-      switch (c) {
-        case 0x22: inDouble = true; break         // "
-        case 0x27: inSingle = true; break         // '
-        case 0x60: inTemplateString = true; break // `
-        case 0x28: paren++; break                 // (
-        case 0x29: paren--; break                 // )
-        case 0x5B: square++; break                // [
-        case 0x5D: square--; break                // ]
-        case 0x7B: curly++; break                 // {
-        case 0x7D: curly--; break                 // }
+      if (!el.classList.length) {
+        el.removeAttribute('class');
       }
-      if (c === 0x2f) { // /
-        var j = i - 1;
-        var p = (void 0);
-        // find first non-whitespace prev char
-        for (; j >= 0; j--) {
-          p = exp.charAt(j);
-          if (p !== ' ') { break }
-        }
-        if (!p || !validDivisionCharRE.test(p)) {
-          inRegex = true;
-        }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      var tar = ' ' + cls + ' ';
+      while (cur.indexOf(tar) >= 0) {
+        cur = cur.replace(tar, ' ');
+      }
+      cur = cur.trim();
+      if (cur) {
+        el.setAttribute('class', cur);
+      } else {
+        el.removeAttribute('class');
       }
     }
   }
 
-  if (expression === undefined) {
-    expression = exp.slice(0, i).trim();
-  } else if (lastFilterIndex !== 0) {
-    pushFilter();
-  }
+  /*  */
 
-  function pushFilter () {
-    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
-    lastFilterIndex = i + 1;
+  function resolveTransition (def$$1) {
+    if (!def$$1) {
+      return
+    }
+    /* istanbul ignore else */
+    if (typeof def$$1 === 'object') {
+      var res = {};
+      if (def$$1.css !== false) {
+        extend(res, autoCssTransition(def$$1.name || 'v'));
+      }
+      extend(res, def$$1);
+      return res
+    } else if (typeof def$$1 === 'string') {
+      return autoCssTransition(def$$1)
+    }
   }
 
-  if (filters) {
-    for (i = 0; i < filters.length; i++) {
-      expression = wrapFilter(expression, filters[i]);
+  var autoCssTransition = cached(function (name) {
+    return {
+      enterClass: (name + "-enter"),
+      enterToClass: (name + "-enter-to"),
+      enterActiveClass: (name + "-enter-active"),
+      leaveClass: (name + "-leave"),
+      leaveToClass: (name + "-leave-to"),
+      leaveActiveClass: (name + "-leave-active")
     }
-  }
+  });
 
-  return expression
-}
+  var hasTransition = inBrowser && !isIE9;
+  var TRANSITION = 'transition';
+  var ANIMATION = 'animation';
 
-function wrapFilter (exp, filter) {
-  var i = filter.indexOf('(');
-  if (i < 0) {
-    // _f: resolveFilter
-    return ("_f(\"" + filter + "\")(" + exp + ")")
-  } else {
-    var name = filter.slice(0, i);
-    var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
-  }
-}
-
-/*  */
-
-function baseWarn (msg) {
-  console.error(("[Vue compiler]: " + msg));
-}
-
-function pluckModuleFunction (
-  modules,
-  key
-) {
-  return modules
-    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
-    : []
-}
-
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-// add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
-  el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
-}
-
-function addDirective (
-  el,
-  name,
-  rawName,
-  value,
-  arg,
-  modifiers
-) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
-  el.plain = false;
-}
-
-function addHandler (
-  el,
-  name,
-  value,
-  modifiers,
-  important,
-  warn
-) {
-  modifiers = modifiers || emptyObject;
-  // warn prevent and passive modifier
-  /* istanbul ignore if */
-  if (
-    "development" !== 'production' && warn &&
-    modifiers.prevent && modifiers.passive
-  ) {
-    warn(
-      'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
-    );
+  // Transition property/event sniffing
+  var transitionProp = 'transition';
+  var transitionEndEvent = 'transitionend';
+  var animationProp = 'animation';
+  var animationEndEvent = 'animationend';
+  if (hasTransition) {
+    /* istanbul ignore if */
+    if (window.ontransitionend === undefined &&
+      window.onwebkittransitionend !== undefined
+    ) {
+      transitionProp = 'WebkitTransition';
+      transitionEndEvent = 'webkitTransitionEnd';
+    }
+    if (window.onanimationend === undefined &&
+      window.onwebkitanimationend !== undefined
+    ) {
+      animationProp = 'WebkitAnimation';
+      animationEndEvent = 'webkitAnimationEnd';
+    }
   }
 
-  // check capture modifier
-  if (modifiers.capture) {
-    delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
-  }
-  if (modifiers.once) {
-    delete modifiers.once;
-    name = '~' + name; // mark the event as once
-  }
-  /* istanbul ignore if */
-  if (modifiers.passive) {
-    delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
+  // binding to window is necessary to make hot reload work in IE in strict mode
+  var raf = inBrowser
+    ? window.requestAnimationFrame
+      ? window.requestAnimationFrame.bind(window)
+      : setTimeout
+    : /* istanbul ignore next */ function (fn) { return fn(); };
+
+  function nextFrame (fn) {
+    raf(function () {
+      raf(fn);
+    });
   }
 
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
+  function addTransitionClass (el, cls) {
+    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+    if (transitionClasses.indexOf(cls) < 0) {
+      transitionClasses.push(cls);
+      addClass(el, cls);
     }
   }
 
-  var events;
-  if (modifiers.native) {
-    delete modifiers.native;
-    events = el.nativeEvents || (el.nativeEvents = {});
-  } else {
-    events = el.events || (el.events = {});
+  function removeTransitionClass (el, cls) {
+    if (el._transitionClasses) {
+      remove(el._transitionClasses, cls);
+    }
+    removeClass(el, cls);
   }
 
-  var newHandler = { value: value };
-  if (modifiers !== emptyObject) {
-    newHandler.modifiers = modifiers;
+  function whenTransitionEnds (
+    el,
+    expectedType,
+    cb
+  ) {
+    var ref = getTransitionInfo(el, expectedType);
+    var type = ref.type;
+    var timeout = ref.timeout;
+    var propCount = ref.propCount;
+    if (!type) { return cb() }
+    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+    var ended = 0;
+    var end = function () {
+      el.removeEventListener(event, onEnd);
+      cb();
+    };
+    var onEnd = function (e) {
+      if (e.target === el) {
+        if (++ended >= propCount) {
+          end();
+        }
+      }
+    };
+    setTimeout(function () {
+      if (ended < propCount) {
+        end();
+      }
+    }, timeout + 1);
+    el.addEventListener(event, onEnd);
   }
 
-  var handlers = events[name];
-  /* istanbul ignore if */
-  if (Array.isArray(handlers)) {
-    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
-  } else if (handlers) {
-    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
-  } else {
-    events[name] = newHandler;
-  }
-
-  el.plain = false;
-}
-
-function getBindingAttr (
-  el,
-  name,
-  getStatic
-) {
-  var dynamicValue =
-    getAndRemoveAttr(el, ':' + name) ||
-    getAndRemoveAttr(el, 'v-bind:' + name);
-  if (dynamicValue != null) {
-    return parseFilters(dynamicValue)
-  } else if (getStatic !== false) {
-    var staticValue = getAndRemoveAttr(el, name);
-    if (staticValue != null) {
-      return JSON.stringify(staticValue)
-    }
-  }
-}
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-function getAndRemoveAttr (
-  el,
-  name,
-  removeFromMap
-) {
-  var val;
-  if ((val = el.attrsMap[name]) != null) {
-    var list = el.attrsList;
-    for (var i = 0, l = list.length; i < l; i++) {
-      if (list[i].name === name) {
-        list.splice(i, 1);
-        break
+  var transformRE = /\b(transform|all)(,|$)/;
+
+  function getTransitionInfo (el, expectedType) {
+    var styles = window.getComputedStyle(el);
+    // JSDOM may return undefined for transition properties
+    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+    var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+    var type;
+    var timeout = 0;
+    var propCount = 0;
+    /* istanbul ignore if */
+    if (expectedType === TRANSITION) {
+      if (transitionTimeout > 0) {
+        type = TRANSITION;
+        timeout = transitionTimeout;
+        propCount = transitionDurations.length;
+      }
+    } else if (expectedType === ANIMATION) {
+      if (animationTimeout > 0) {
+        type = ANIMATION;
+        timeout = animationTimeout;
+        propCount = animationDurations.length;
       }
+    } else {
+      timeout = Math.max(transitionTimeout, animationTimeout);
+      type = timeout > 0
+        ? transitionTimeout > animationTimeout
+          ? TRANSITION
+          : ANIMATION
+        : null;
+      propCount = type
+        ? type === TRANSITION
+          ? transitionDurations.length
+          : animationDurations.length
+        : 0;
+    }
+    var hasTransform =
+      type === TRANSITION &&
+      transformRE.test(styles[transitionProp + 'Property']);
+    return {
+      type: type,
+      timeout: timeout,
+      propCount: propCount,
+      hasTransform: hasTransform
     }
   }
-  if (removeFromMap) {
-    delete el.attrsMap[name];
-  }
-  return val
-}
 
-/*  */
+  function getTimeout (delays, durations) {
+    /* istanbul ignore next */
+    while (delays.length < durations.length) {
+      delays = delays.concat(delays);
+    }
 
-/**
- * Cross-platform code generation for component v-model
- */
-function genComponentModel (
-  el,
-  value,
-  modifiers
-) {
-  var ref = modifiers || {};
-  var number = ref.number;
-  var trim = ref.trim;
-
-  var baseValueExpression = '$$v';
-  var valueExpression = baseValueExpression;
-  if (trim) {
-    valueExpression =
-      "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
+    return Math.max.apply(null, durations.map(function (d, i) {
+      return toMs(d) + toMs(delays[i])
+    }))
   }
-  var assignment = genAssignmentCode(value, valueExpression);
 
-  el.model = {
-    value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
-    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
-  };
-}
+  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+  // in a locale-dependent way, using a comma instead of a dot.
+  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+  // as a floor function) causing unexpected behaviors
+  function toMs (s) {
+    return Number(s.slice(0, -1).replace(',', '.')) * 1000
+  }
 
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-function genAssignmentCode (
-  value,
-  assignment
-) {
-  var res = parseModel(value);
-  if (res.key === null) {
-    return (value + "=" + assignment)
-  } else {
-    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
-  }
-}
-
-/**
- * Parse a v-model expression into a base path and a final key segment.
- * Handles both dot-path and possible square brackets.
- *
- * Possible cases:
- *
- * - test
- * - test[key]
- * - test[test1[key]]
- * - test["a"][key]
- * - xxx.test[a[a].test1[key]]
- * - test.xxx.a["asa"][test1[key]]
- *
- */
+  /*  */
 
-var len;
-var str;
-var chr;
-var index$1;
-var expressionPos;
-var expressionEndPos;
+  function enter (vnode, toggleDisplay) {
+    var el = vnode.elm;
 
+    // call leave callback now
+    if (isDef(el._leaveCb)) {
+      el._leaveCb.cancelled = true;
+      el._leaveCb();
+    }
 
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data)) {
+      return
+    }
 
-function parseModel (val) {
-  len = val.length;
+    /* istanbul ignore if */
+    if (isDef(el._enterCb) || el.nodeType !== 1) {
+      return
+    }
 
-  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
-    index$1 = val.lastIndexOf('.');
-    if (index$1 > -1) {
-      return {
-        exp: val.slice(0, index$1),
-        key: '"' + val.slice(index$1 + 1) + '"'
-      }
-    } else {
-      return {
-        exp: val,
-        key: null
-      }
+    var css = data.css;
+    var type = data.type;
+    var enterClass = data.enterClass;
+    var enterToClass = data.enterToClass;
+    var enterActiveClass = data.enterActiveClass;
+    var appearClass = data.appearClass;
+    var appearToClass = data.appearToClass;
+    var appearActiveClass = data.appearActiveClass;
+    var beforeEnter = data.beforeEnter;
+    var enter = data.enter;
+    var afterEnter = data.afterEnter;
+    var enterCancelled = data.enterCancelled;
+    var beforeAppear = data.beforeAppear;
+    var appear = data.appear;
+    var afterAppear = data.afterAppear;
+    var appearCancelled = data.appearCancelled;
+    var duration = data.duration;
+
+    // activeInstance will always be the <transition> component managing this
+    // transition. One edge case to check is when the <transition> is placed
+    // as the root node of a child component. In that case we need to check
+    // <transition>'s parent for appear check.
+    var context = activeInstance;
+    var transitionNode = activeInstance.$vnode;
+    while (transitionNode && transitionNode.parent) {
+      context = transitionNode.context;
+      transitionNode = transitionNode.parent;
+    }
+
+    var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+    if (isAppear && !appear && appear !== '') {
+      return
     }
-  }
 
-  str = val;
-  index$1 = expressionPos = expressionEndPos = 0;
+    var startClass = isAppear && appearClass
+      ? appearClass
+      : enterClass;
+    var activeClass = isAppear && appearActiveClass
+      ? appearActiveClass
+      : enterActiveClass;
+    var toClass = isAppear && appearToClass
+      ? appearToClass
+      : enterToClass;
+
+    var beforeEnterHook = isAppear
+      ? (beforeAppear || beforeEnter)
+      : beforeEnter;
+    var enterHook = isAppear
+      ? (typeof appear === 'function' ? appear : enter)
+      : enter;
+    var afterEnterHook = isAppear
+      ? (afterAppear || afterEnter)
+      : afterEnter;
+    var enterCancelledHook = isAppear
+      ? (appearCancelled || enterCancelled)
+      : enterCancelled;
+
+    var explicitEnterDuration = toNumber(
+      isObject(duration)
+        ? duration.enter
+        : duration
+    );
 
-  while (!eof()) {
-    chr = next();
-    /* istanbul ignore if */
-    if (isStringStart(chr)) {
-      parseString(chr);
-    } else if (chr === 0x5B) {
-      parseBracket(chr);
+    if (explicitEnterDuration != null) {
+      checkDuration(explicitEnterDuration, 'enter', vnode);
     }
-  }
 
-  return {
-    exp: val.slice(0, expressionPos),
-    key: val.slice(expressionPos + 1, expressionEndPos)
-  }
-}
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(enterHook);
 
-function next () {
-  return str.charCodeAt(++index$1)
-}
+    var cb = el._enterCb = once(function () {
+      if (expectsCSS) {
+        removeTransitionClass(el, toClass);
+        removeTransitionClass(el, activeClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, startClass);
+        }
+        enterCancelledHook && enterCancelledHook(el);
+      } else {
+        afterEnterHook && afterEnterHook(el);
+      }
+      el._enterCb = null;
+    });
 
-function eof () {
-  return index$1 >= len
-}
+    if (!vnode.data.show) {
+      // remove pending leave element on enter by injecting an insert hook
+      mergeVNodeHook(vnode, 'insert', function () {
+        var parent = el.parentNode;
+        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+        if (pendingNode &&
+          pendingNode.tag === vnode.tag &&
+          pendingNode.elm._leaveCb
+        ) {
+          pendingNode.elm._leaveCb();
+        }
+        enterHook && enterHook(el, cb);
+      });
+    }
 
-function isStringStart (chr) {
-  return chr === 0x22 || chr === 0x27
-}
+    // start enter transition
+    beforeEnterHook && beforeEnterHook(el);
+    if (expectsCSS) {
+      addTransitionClass(el, startClass);
+      addTransitionClass(el, activeClass);
+      nextFrame(function () {
+        removeTransitionClass(el, startClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, toClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitEnterDuration)) {
+              setTimeout(cb, explicitEnterDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
 
-function parseBracket (chr) {
-  var inBracket = 1;
-  expressionPos = index$1;
-  while (!eof()) {
-    chr = next();
-    if (isStringStart(chr)) {
-      parseString(chr);
-      continue
+    if (vnode.data.show) {
+      toggleDisplay && toggleDisplay();
+      enterHook && enterHook(el, cb);
     }
-    if (chr === 0x5B) { inBracket++; }
-    if (chr === 0x5D) { inBracket--; }
-    if (inBracket === 0) {
-      expressionEndPos = index$1;
-      break
+
+    if (!expectsCSS && !userWantsControl) {
+      cb();
     }
   }
-}
 
-function parseString (chr) {
-  var stringQuote = chr;
-  while (!eof()) {
-    chr = next();
-    if (chr === stringQuote) {
-      break
+  function leave (vnode, rm) {
+    var el = vnode.elm;
+
+    // call enter callback now
+    if (isDef(el._enterCb)) {
+      el._enterCb.cancelled = true;
+      el._enterCb();
     }
-  }
-}
 
-/*  */
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data) || el.nodeType !== 1) {
+      return rm()
+    }
 
-var warn$1;
+    /* istanbul ignore if */
+    if (isDef(el._leaveCb)) {
+      return
+    }
 
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
-var CHECKBOX_RADIO_TOKEN = '__c';
+    var css = data.css;
+    var type = data.type;
+    var leaveClass = data.leaveClass;
+    var leaveToClass = data.leaveToClass;
+    var leaveActiveClass = data.leaveActiveClass;
+    var beforeLeave = data.beforeLeave;
+    var leave = data.leave;
+    var afterLeave = data.afterLeave;
+    var leaveCancelled = data.leaveCancelled;
+    var delayLeave = data.delayLeave;
+    var duration = data.duration;
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(leave);
+
+    var explicitLeaveDuration = toNumber(
+      isObject(duration)
+        ? duration.leave
+        : duration
+    );
 
-function model (
-  el,
-  dir,
-  _warn
-) {
-  warn$1 = _warn;
-  var value = dir.value;
-  var modifiers = dir.modifiers;
-  var tag = el.tag;
-  var type = el.attrsMap.type;
+    if (isDef(explicitLeaveDuration)) {
+      checkDuration(explicitLeaveDuration, 'leave', vnode);
+    }
 
-  {
-    // inputs with type="file" are read only and setting the input's
-    // value will throw an error.
-    if (tag === 'input' && type === 'file') {
-      warn$1(
-        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
-      );
+    var cb = el._leaveCb = once(function () {
+      if (el.parentNode && el.parentNode._pending) {
+        el.parentNode._pending[vnode.key] = null;
+      }
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveToClass);
+        removeTransitionClass(el, leaveActiveClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, leaveClass);
+        }
+        leaveCancelled && leaveCancelled(el);
+      } else {
+        rm();
+        afterLeave && afterLeave(el);
+      }
+      el._leaveCb = null;
+    });
+
+    if (delayLeave) {
+      delayLeave(performLeave);
+    } else {
+      performLeave();
     }
-  }
 
-  if (el.component) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else if (tag === 'select') {
-    genSelect(el, value, modifiers);
-  } else if (tag === 'input' && type === 'checkbox') {
-    genCheckboxModel(el, value, modifiers);
-  } else if (tag === 'input' && type === 'radio') {
-    genRadioModel(el, value, modifiers);
-  } else if (tag === 'input' || tag === 'textarea') {
-    genDefaultModel(el, value, modifiers);
-  } else if (!config.isReservedTag(tag)) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else {
-    warn$1(
-      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-      "v-model is not supported on this element type. " +
-      'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
-    );
+    function performLeave () {
+      // the delayed leave may have already been cancelled
+      if (cb.cancelled) {
+        return
+      }
+      // record leaving element
+      if (!vnode.data.show && el.parentNode) {
+        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+      }
+      beforeLeave && beforeLeave(el);
+      if (expectsCSS) {
+        addTransitionClass(el, leaveClass);
+        addTransitionClass(el, leaveActiveClass);
+        nextFrame(function () {
+          removeTransitionClass(el, leaveClass);
+          if (!cb.cancelled) {
+            addTransitionClass(el, leaveToClass);
+            if (!userWantsControl) {
+              if (isValidDuration(explicitLeaveDuration)) {
+                setTimeout(cb, explicitLeaveDuration);
+              } else {
+                whenTransitionEnds(el, type, cb);
+              }
+            }
+          }
+        });
+      }
+      leave && leave(el, cb);
+      if (!expectsCSS && !userWantsControl) {
+        cb();
+      }
+    }
   }
 
-  // ensure runtime directive metadata
-  return true
-}
-
-function genCheckboxModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
-  addProp(el, 'checked',
-    "Array.isArray(" + value + ")" +
-    "?_i(" + value + "," + valueBinding + ")>-1" + (
-      trueValueBinding === 'true'
-        ? (":(" + value + ")")
-        : (":_q(" + value + "," + trueValueBinding + ")")
-    )
-  );
-  addHandler(el, 'change',
-    "var $$a=" + value + "," +
-        '$$el=$event.target,' +
-        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
-    'if(Array.isArray($$a)){' +
-      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
-          '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
-    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
-    null, true
-  );
-}
-
-function genRadioModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
-  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
-  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-}
-
-function genSelect (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var selectedVal = "Array.prototype.filter" +
-    ".call($event.target.options,function(o){return o.selected})" +
-    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
-    "return " + (number ? '_n(val)' : 'val') + "})";
-
-  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-  var code = "var $$selectedVal = " + selectedVal + ";";
-  code = code + " " + (genAssignmentCode(value, assignment));
-  addHandler(el, 'change', code, null, true);
-}
-
-function genDefaultModel (
-  el,
-  value,
-  modifiers
-) {
-  var type = el.attrsMap.type;
-
-  // warn if v-bind:value conflicts with v-model
-  {
-    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
-      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
-      warn$1(
-        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
+  // only used in dev mode
+  function checkDuration (val, name, vnode) {
+    if (typeof val !== 'number') {
+      warn(
+        "<transition> explicit " + name + " duration is not a valid number - " +
+        "got " + (JSON.stringify(val)) + ".",
+        vnode.context
+      );
+    } else if (isNaN(val)) {
+      warn(
+        "<transition> explicit " + name + " duration is NaN - " +
+        'the duration expression might be incorrect.',
+        vnode.context
       );
     }
   }
 
-  var ref = modifiers || {};
-  var lazy = ref.lazy;
-  var number = ref.number;
-  var trim = ref.trim;
-  var needCompositionGuard = !lazy && type !== 'range';
-  var event = lazy
-    ? 'change'
-    : type === 'range'
-      ? RANGE_TOKEN
-      : 'input';
-
-  var valueExpression = '$event.target.value';
-  if (trim) {
-    valueExpression = "$event.target.value.trim()";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
+  function isValidDuration (val) {
+    return typeof val === 'number' && !isNaN(val)
   }
 
-  var code = genAssignmentCode(value, valueExpression);
-  if (needCompositionGuard) {
-    code = "if($event.target.composing)return;" + code;
+  /**
+   * Normalize a transition hook's argument length. The hook may be:
+   * - a merged hook (invoker) with the original in .fns
+   * - a wrapped component method (check ._length)
+   * - a plain function (.length)
+   */
+  function getHookArgumentsLength (fn) {
+    if (isUndef(fn)) {
+      return false
+    }
+    var invokerFns = fn.fns;
+    if (isDef(invokerFns)) {
+      // invoker
+      return getHookArgumentsLength(
+        Array.isArray(invokerFns)
+          ? invokerFns[0]
+          : invokerFns
+      )
+    } else {
+      return (fn._length || fn.length) > 1
+    }
   }
 
-  addProp(el, 'value', ("(" + value + ")"));
-  addHandler(el, event, code, null, true);
-  if (trim || number) {
-    addHandler(el, 'blur', '$forceUpdate()');
+  function _enter (_, vnode) {
+    if (vnode.data.show !== true) {
+      enter(vnode);
+    }
   }
-}
 
-/*  */
+  var transition = inBrowser ? {
+    create: _enter,
+    activate: _enter,
+    remove: function remove$$1 (vnode, rm) {
+      /* istanbul ignore else */
+      if (vnode.data.show !== true) {
+        leave(vnode, rm);
+      } else {
+        rm();
+      }
+    }
+  } : {};
+
+  var platformModules = [
+    attrs,
+    klass,
+    events,
+    domProps,
+    style,
+    transition
+  ];
+
+  /*  */
+
+  // the directive module should be applied last, after all
+  // built-in modules have been applied.
+  var modules = platformModules.concat(baseModules);
+
+  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+  /**
+   * Not type checking this file because flow doesn't like attaching
+   * properties to Elements.
+   */
 
-// normalize v-model event tokens that can only be determined at runtime.
-// it's important to place the event as the first in the array because
-// the whole point is ensuring the v-model callback gets called before
-// user-attached handlers.
-function normalizeEvents (on) {
-  /* istanbul ignore if */
-  if (isDef(on[RANGE_TOKEN])) {
-    // IE input[type=range] only supports `change` event
-    var event = isIE ? 'change' : 'input';
-    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
-    delete on[RANGE_TOKEN];
-  }
-  // This was originally intended to fix #4521 but no longer necessary
-  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
   /* istanbul ignore if */
-  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
-    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
-    delete on[CHECKBOX_RADIO_TOKEN];
-  }
-}
-
-var target$1;
-
-function createOnceHandler (handler, event, capture) {
-  var _target = target$1; // save current target element in closure
-  return function onceHandler () {
-    var res = handler.apply(null, arguments);
-    if (res !== null) {
-      remove$2(event, onceHandler, capture, _target);
-    }
-  }
-}
-
-function add$1 (
-  event,
-  handler,
-  once$$1,
-  capture,
-  passive
-) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
-  target$1.addEventListener(
-    event,
-    handler,
-    supportsPassive
-      ? { capture: capture, passive: passive }
-      : capture
-  );
-}
-
-function remove$2 (
-  event,
-  handler,
-  capture,
-  _target
-) {
-  (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
-    capture
-  );
-}
-
-function updateDOMListeners (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
-    return
-  }
-  var on = vnode.data.on || {};
-  var oldOn = oldVnode.data.on || {};
-  target$1 = vnode.elm;
-  normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
-  target$1 = undefined;
-}
-
-var events = {
-  create: updateDOMListeners,
-  update: updateDOMListeners
-};
-
-/*  */
-
-function updateDOMProps (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-    return
-  }
-  var key, cur;
-  var elm = vnode.elm;
-  var oldProps = oldVnode.data.domProps || {};
-  var props = vnode.data.domProps || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(props.__ob__)) {
-    props = vnode.data.domProps = extend({}, props);
-  }
-
-  for (key in oldProps) {
-    if (isUndef(props[key])) {
-      elm[key] = '';
-    }
-  }
-  for (key in props) {
-    cur = props[key];
-    // ignore children if the node has textContent or innerHTML,
-    // as these will throw away existing DOM nodes and cause removal errors
-    // on subsequent patches (#3360)
-    if (key === 'textContent' || key === 'innerHTML') {
-      if (vnode.children) { vnode.children.length = 0; }
-      if (cur === oldProps[key]) { continue }
-      // #6601 work around Chrome version <= 55 bug where single textNode
-      // replaced by innerHTML/textContent retains its parentNode property
-      if (elm.childNodes.length === 1) {
-        elm.removeChild(elm.childNodes[0]);
-      }
-    }
-
-    if (key === 'value') {
-      // store value as _value as well since
-      // non-string values will be stringified
-      elm._value = cur;
-      // avoid resetting cursor position when value is the same
-      var strCur = isUndef(cur) ? '' : String(cur);
-      if (shouldUpdateValue(elm, strCur)) {
-        elm.value = strCur;
+  if (isIE9) {
+    // http://www.matts411.com/post/internet-explorer-9-oninput/
+    document.addEventListener('selectionchange', function () {
+      var el = document.activeElement;
+      if (el && el.vmodel) {
+        trigger(el, 'input');
+      }
+    });
+  }
+
+  var directive = {
+    inserted: function inserted (el, binding, vnode, oldVnode) {
+      if (vnode.tag === 'select') {
+        // #6903
+        if (oldVnode.elm && !oldVnode.elm._vOptions) {
+          mergeVNodeHook(vnode, 'postpatch', function () {
+            directive.componentUpdated(el, binding, vnode);
+          });
+        } else {
+          setSelected(el, binding, vnode.context);
+        }
+        el._vOptions = [].map.call(el.options, getValue);
+      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+        el._vModifiers = binding.modifiers;
+        if (!binding.modifiers.lazy) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+          // Safari < 10.2 & UIWebView doesn't fire compositionend when
+          // switching focus before confirming composition choice
+          // this also fixes the issue where some browsers e.g. iOS Chrome
+          // fires "change" instead of "input" on autocomplete.
+          el.addEventListener('change', onCompositionEnd);
+          /* istanbul ignore if */
+          if (isIE9) {
+            el.vmodel = true;
+          }
+        }
+      }
+    },
+
+    componentUpdated: function componentUpdated (el, binding, vnode) {
+      if (vnode.tag === 'select') {
+        setSelected(el, binding, vnode.context);
+        // in case the options rendered by v-for have changed,
+        // it's possible that the value is out-of-sync with the rendered options.
+        // detect such cases and filter out values that no longer has a matching
+        // option in the DOM.
+        var prevOptions = el._vOptions;
+        var curOptions = el._vOptions = [].map.call(el.options, getValue);
+        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+          // trigger change event if
+          // no matching option found for at least one value
+          var needReset = el.multiple
+            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+          if (needReset) {
+            trigger(el, 'change');
+          }
+        }
       }
-    } else {
-      elm[key] = cur;
-    }
-  }
-}
-
-// check platforms/web/util/attrs.js acceptValue
-
-
-function shouldUpdateValue (elm, checkVal) {
-  return (!elm.composing && (
-    elm.tagName === 'OPTION' ||
-    isNotInFocusAndDirty(elm, checkVal) ||
-    isDirtyWithModifiers(elm, checkVal)
-  ))
-}
-
-function isNotInFocusAndDirty (elm, checkVal) {
-  // return true when textbox (.number and .trim) loses focus and its value is
-  // not equal to the updated value
-  var notInFocus = true;
-  // #6157
-  // work around IE bug when accessing document.activeElement in an iframe
-  try { notInFocus = document.activeElement !== elm; } catch (e) {}
-  return notInFocus && elm.value !== checkVal
-}
-
-function isDirtyWithModifiers (elm, newVal) {
-  var value = elm.value;
-  var modifiers = elm._vModifiers; // injected by v-model runtime
-  if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
-    if (modifiers.number) {
-      return toNumber(value) !== toNumber(newVal)
     }
-    if (modifiers.trim) {
-      return value.trim() !== newVal.trim()
+  };
+
+  function setSelected (el, binding, vm) {
+    actuallySetSelected(el, binding, vm);
+    /* istanbul ignore if */
+    if (isIE || isEdge) {
+      setTimeout(function () {
+        actuallySetSelected(el, binding, vm);
+      }, 0);
     }
   }
-  return value !== newVal
-}
 
-var domProps = {
-  create: updateDOMProps,
-  update: updateDOMProps
-};
-
-/*  */
-
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+  function actuallySetSelected (el, binding, vm) {
+    var value = binding.value;
+    var isMultiple = el.multiple;
+    if (isMultiple && !Array.isArray(value)) {
+      warn(
+        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+        vm
+      );
+      return
     }
-  });
-  return res
-});
-
-// merge static and dynamic style data on the same vnode
-function normalizeStyleData (data) {
-  var style = normalizeStyleBinding(data.style);
-  // static style is pre-processed into an object during compilation
-  // and is always a fresh object, so it's safe to merge into it
-  return data.staticStyle
-    ? extend(data.staticStyle, style)
-    : style
-}
-
-// normalize possible array / string values into Object
-function normalizeStyleBinding (bindingStyle) {
-  if (Array.isArray(bindingStyle)) {
-    return toObject(bindingStyle)
-  }
-  if (typeof bindingStyle === 'string') {
-    return parseStyleText(bindingStyle)
-  }
-  return bindingStyle
-}
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-function getStyle (vnode, checkChild) {
-  var res = {};
-  var styleData;
-
-  if (checkChild) {
-    var childNode = vnode;
-    while (childNode.componentInstance) {
-      childNode = childNode.componentInstance._vnode;
-      if (
-        childNode && childNode.data &&
-        (styleData = normalizeStyleData(childNode.data))
-      ) {
-        extend(res, styleData);
+    var selected, option;
+    for (var i = 0, l = el.options.length; i < l; i++) {
+      option = el.options[i];
+      if (isMultiple) {
+        selected = looseIndexOf(value, getValue(option)) > -1;
+        if (option.selected !== selected) {
+          option.selected = selected;
+        }
+      } else {
+        if (looseEqual(getValue(option), value)) {
+          if (el.selectedIndex !== i) {
+            el.selectedIndex = i;
+          }
+          return
+        }
       }
     }
+    if (!isMultiple) {
+      el.selectedIndex = -1;
+    }
   }
 
-  if ((styleData = normalizeStyleData(vnode.data))) {
-    extend(res, styleData);
+  function hasNoMatchingOption (value, options) {
+    return options.every(function (o) { return !looseEqual(o, value); })
   }
 
-  var parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
-    }
+  function getValue (option) {
+    return '_value' in option
+      ? option._value
+      : option.value
   }
-  return res
-}
-
-/*  */
 
-var cssVarRE = /^--/;
-var importantRE = /\s*!important$/;
-var setProp = function (el, name, val) {
-  /* istanbul ignore if */
-  if (cssVarRE.test(name)) {
-    el.style.setProperty(name, val);
-  } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
-  } else {
-    var normalizedName = normalize(name);
-    if (Array.isArray(val)) {
-      // Support values array created by autoprefixer, e.g.
-      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
-      // Set them one by one, and the browser will only set those it can recognize
-      for (var i = 0, len = val.length; i < len; i++) {
-        el.style[normalizedName] = val[i];
-      }
-    } else {
-      el.style[normalizedName] = val;
-    }
+  function onCompositionStart (e) {
+    e.target.composing = true;
   }
-};
-
-var vendorNames = ['Webkit', 'Moz', 'ms'];
 
-var emptyStyle;
-var normalize = cached(function (prop) {
-  emptyStyle = emptyStyle || document.createElement('div').style;
-  prop = camelize(prop);
-  if (prop !== 'filter' && (prop in emptyStyle)) {
-    return prop
+  function onCompositionEnd (e) {
+    // prevent triggering an input event for no reason
+    if (!e.target.composing) { return }
+    e.target.composing = false;
+    trigger(e.target, 'input');
   }
-  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-  for (var i = 0; i < vendorNames.length; i++) {
-    var name = vendorNames[i] + capName;
-    if (name in emptyStyle) {
-      return name
-    }
+
+  function trigger (el, type) {
+    var e = document.createEvent('HTMLEvents');
+    e.initEvent(type, true, true);
+    el.dispatchEvent(e);
   }
-});
 
-function updateStyle (oldVnode, vnode) {
-  var data = vnode.data;
-  var oldData = oldVnode.data;
+  /*  */
 
-  if (isUndef(data.staticStyle) && isUndef(data.style) &&
-    isUndef(oldData.staticStyle) && isUndef(oldData.style)
-  ) {
-    return
+  // recursively search for possible transition defined inside the component root
+  function locateNode (vnode) {
+    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+      ? locateNode(vnode.componentInstance._vnode)
+      : vnode
   }
 
-  var cur, name;
-  var el = vnode.elm;
-  var oldStaticStyle = oldData.staticStyle;
-  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-  var oldStyle = oldStaticStyle || oldStyleBinding;
+  var show = {
+    bind: function bind (el, ref, vnode) {
+      var value = ref.value;
 
-  var style = normalizeStyleBinding(vnode.data.style) || {};
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      var originalDisplay = el.__vOriginalDisplay =
+        el.style.display === 'none' ? '' : el.style.display;
+      if (value && transition$$1) {
+        vnode.data.show = true;
+        enter(vnode, function () {
+          el.style.display = originalDisplay;
+        });
+      } else {
+        el.style.display = value ? originalDisplay : 'none';
+      }
+    },
 
-  // store normalized style under a different key for next diff
-  // make sure to clone it if it's reactive, since the user likely wants
-  // to mutate it.
-  vnode.data.normalizedStyle = isDef(style.__ob__)
-    ? extend({}, style)
-    : style;
+    update: function update (el, ref, vnode) {
+      var value = ref.value;
+      var oldValue = ref.oldValue;
 
-  var newStyle = getStyle(vnode, true);
+      /* istanbul ignore if */
+      if (!value === !oldValue) { return }
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      if (transition$$1) {
+        vnode.data.show = true;
+        if (value) {
+          enter(vnode, function () {
+            el.style.display = el.__vOriginalDisplay;
+          });
+        } else {
+          leave(vnode, function () {
+            el.style.display = 'none';
+          });
+        }
+      } else {
+        el.style.display = value ? el.__vOriginalDisplay : 'none';
+      }
+    },
 
-  for (name in oldStyle) {
-    if (isUndef(newStyle[name])) {
-      setProp(el, name, '');
-    }
-  }
-  for (name in newStyle) {
-    cur = newStyle[name];
-    if (cur !== oldStyle[name]) {
-      // ie9 setting to null has no effect, must use empty string
-      setProp(el, name, cur == null ? '' : cur);
+    unbind: function unbind (
+      el,
+      binding,
+      vnode,
+      oldVnode,
+      isDestroy
+    ) {
+      if (!isDestroy) {
+        el.style.display = el.__vOriginalDisplay;
+      }
     }
-  }
-}
-
-var style = {
-  create: updateStyle,
-  update: updateStyle
-};
+  };
 
-/*  */
+  var platformDirectives = {
+    model: directive,
+    show: show
+  };
 
-/**
- * Add class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function addClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
+  /*  */
+
+  var transitionProps = {
+    name: String,
+    appear: Boolean,
+    css: Boolean,
+    mode: String,
+    type: String,
+    enterClass: String,
+    leaveClass: String,
+    enterToClass: String,
+    leaveToClass: String,
+    enterActiveClass: String,
+    leaveActiveClass: String,
+    appearClass: String,
+    appearActiveClass: String,
+    appearToClass: String,
+    duration: [Number, String, Object]
+  };
 
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
+  // in case the child is also an abstract component, e.g. <keep-alive>
+  // we want to recursively retrieve the real component to be rendered
+  function getRealChild (vnode) {
+    var compOptions = vnode && vnode.componentOptions;
+    if (compOptions && compOptions.Ctor.options.abstract) {
+      return getRealChild(getFirstComponentChild(compOptions.children))
     } else {
-      el.classList.add(cls);
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    if (cur.indexOf(' ' + cls + ' ') < 0) {
-      el.setAttribute('class', (cur + cls).trim());
+      return vnode
     }
   }
-}
-
-/**
- * Remove class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function removeClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
 
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
-    } else {
-      el.classList.remove(cls);
+  function extractTransitionData (comp) {
+    var data = {};
+    var options = comp.$options;
+    // props
+    for (var key in options.propsData) {
+      data[key] = comp[key];
     }
-    if (!el.classList.length) {
-      el.removeAttribute('class');
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    var tar = ' ' + cls + ' ';
-    while (cur.indexOf(tar) >= 0) {
-      cur = cur.replace(tar, ' ');
-    }
-    cur = cur.trim();
-    if (cur) {
-      el.setAttribute('class', cur);
-    } else {
-      el.removeAttribute('class');
+    // events.
+    // extract listeners and pass them directly to the transition methods
+    var listeners = options._parentListeners;
+    for (var key$1 in listeners) {
+      data[camelize(key$1)] = listeners[key$1];
     }
+    return data
   }
-}
-
-/*  */
 
-function resolveTransition (def) {
-  if (!def) {
-    return
-  }
-  /* istanbul ignore else */
-  if (typeof def === 'object') {
-    var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+  function placeholder (h, rawChild) {
+    if (/\d-keep-alive$/.test(rawChild.tag)) {
+      return h('keep-alive', {
+        props: rawChild.componentOptions.propsData
+      })
     }
-    extend(res, def);
-    return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
-  }
-}
-
-var autoCssTransition = cached(function (name) {
-  return {
-    enterClass: (name + "-enter"),
-    enterToClass: (name + "-enter-to"),
-    enterActiveClass: (name + "-enter-active"),
-    leaveClass: (name + "-leave"),
-    leaveToClass: (name + "-leave-to"),
-    leaveActiveClass: (name + "-leave-active")
-  }
-});
-
-var hasTransition = inBrowser && !isIE9;
-var TRANSITION = 'transition';
-var ANIMATION = 'animation';
-
-// Transition property/event sniffing
-var transitionProp = 'transition';
-var transitionEndEvent = 'transitionend';
-var animationProp = 'animation';
-var animationEndEvent = 'animationend';
-if (hasTransition) {
-  /* istanbul ignore if */
-  if (window.ontransitionend === undefined &&
-    window.onwebkittransitionend !== undefined
-  ) {
-    transitionProp = 'WebkitTransition';
-    transitionEndEvent = 'webkitTransitionEnd';
   }
-  if (window.onanimationend === undefined &&
-    window.onwebkitanimationend !== undefined
-  ) {
-    animationProp = 'WebkitAnimation';
-    animationEndEvent = 'webkitAnimationEnd';
-  }
-}
 
-// binding to window is necessary to make hot reload work in IE in strict mode
-var raf = inBrowser
-  ? window.requestAnimationFrame
-    ? window.requestAnimationFrame.bind(window)
-    : setTimeout
-  : /* istanbul ignore next */ function (fn) { return fn(); };
-
-function nextFrame (fn) {
-  raf(function () {
-    raf(fn);
-  });
-}
-
-function addTransitionClass (el, cls) {
-  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
-  if (transitionClasses.indexOf(cls) < 0) {
-    transitionClasses.push(cls);
-    addClass(el, cls);
-  }
-}
-
-function removeTransitionClass (el, cls) {
-  if (el._transitionClasses) {
-    remove(el._transitionClasses, cls);
-  }
-  removeClass(el, cls);
-}
-
-function whenTransitionEnds (
-  el,
-  expectedType,
-  cb
-) {
-  var ref = getTransitionInfo(el, expectedType);
-  var type = ref.type;
-  var timeout = ref.timeout;
-  var propCount = ref.propCount;
-  if (!type) { return cb() }
-  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-  var ended = 0;
-  var end = function () {
-    el.removeEventListener(event, onEnd);
-    cb();
-  };
-  var onEnd = function (e) {
-    if (e.target === el) {
-      if (++ended >= propCount) {
-        end();
+  function hasParentTransition (vnode) {
+    while ((vnode = vnode.parent)) {
+      if (vnode.data.transition) {
+        return true
       }
     }
-  };
-  setTimeout(function () {
-    if (ended < propCount) {
-      end();
-    }
-  }, timeout + 1);
-  el.addEventListener(event, onEnd);
-}
-
-var transformRE = /\b(transform|all)(,|$)/;
-
-function getTransitionInfo (el, expectedType) {
-  var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
-  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
-  var animationTimeout = getTimeout(animationDelays, animationDurations);
-
-  var type;
-  var timeout = 0;
-  var propCount = 0;
-  /* istanbul ignore if */
-  if (expectedType === TRANSITION) {
-    if (transitionTimeout > 0) {
-      type = TRANSITION;
-      timeout = transitionTimeout;
-      propCount = transitionDurations.length;
-    }
-  } else if (expectedType === ANIMATION) {
-    if (animationTimeout > 0) {
-      type = ANIMATION;
-      timeout = animationTimeout;
-      propCount = animationDurations.length;
-    }
-  } else {
-    timeout = Math.max(transitionTimeout, animationTimeout);
-    type = timeout > 0
-      ? transitionTimeout > animationTimeout
-        ? TRANSITION
-        : ANIMATION
-      : null;
-    propCount = type
-      ? type === TRANSITION
-        ? transitionDurations.length
-        : animationDurations.length
-      : 0;
-  }
-  var hasTransform =
-    type === TRANSITION &&
-    transformRE.test(styles[transitionProp + 'Property']);
-  return {
-    type: type,
-    timeout: timeout,
-    propCount: propCount,
-    hasTransform: hasTransform
-  }
-}
-
-function getTimeout (delays, durations) {
-  /* istanbul ignore next */
-  while (delays.length < durations.length) {
-    delays = delays.concat(delays);
   }
 
-  return Math.max.apply(null, durations.map(function (d, i) {
-    return toMs(d) + toMs(delays[i])
-  }))
-}
-
-function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
-}
-
-/*  */
-
-function enter (vnode, toggleDisplay) {
-  var el = vnode.elm;
-
-  // call leave callback now
-  if (isDef(el._leaveCb)) {
-    el._leaveCb.cancelled = true;
-    el._leaveCb();
+  function isSameChild (child, oldChild) {
+    return oldChild.key === child.key && oldChild.tag === child.tag
   }
 
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data)) {
-    return
-  }
+  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
 
-  /* istanbul ignore if */
-  if (isDef(el._enterCb) || el.nodeType !== 1) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var enterClass = data.enterClass;
-  var enterToClass = data.enterToClass;
-  var enterActiveClass = data.enterActiveClass;
-  var appearClass = data.appearClass;
-  var appearToClass = data.appearToClass;
-  var appearActiveClass = data.appearActiveClass;
-  var beforeEnter = data.beforeEnter;
-  var enter = data.enter;
-  var afterEnter = data.afterEnter;
-  var enterCancelled = data.enterCancelled;
-  var beforeAppear = data.beforeAppear;
-  var appear = data.appear;
-  var afterAppear = data.afterAppear;
-  var appearCancelled = data.appearCancelled;
-  var duration = data.duration;
-
-  // activeInstance will always be the <transition> component managing this
-  // transition. One edge case to check is when the <transition> is placed
-  // as the root node of a child component. In that case we need to check
-  // <transition>'s parent for appear check.
-  var context = activeInstance;
-  var transitionNode = activeInstance.$vnode;
-  while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
-    context = transitionNode.context;
-  }
-
-  var isAppear = !context._isMounted || !vnode.isRootInsert;
-
-  if (isAppear && !appear && appear !== '') {
-    return
-  }
-
-  var startClass = isAppear && appearClass
-    ? appearClass
-    : enterClass;
-  var activeClass = isAppear && appearActiveClass
-    ? appearActiveClass
-    : enterActiveClass;
-  var toClass = isAppear && appearToClass
-    ? appearToClass
-    : enterToClass;
-
-  var beforeEnterHook = isAppear
-    ? (beforeAppear || beforeEnter)
-    : beforeEnter;
-  var enterHook = isAppear
-    ? (typeof appear === 'function' ? appear : enter)
-    : enter;
-  var afterEnterHook = isAppear
-    ? (afterAppear || afterEnter)
-    : afterEnter;
-  var enterCancelledHook = isAppear
-    ? (appearCancelled || enterCancelled)
-    : enterCancelled;
-
-  var explicitEnterDuration = toNumber(
-    isObject(duration)
-      ? duration.enter
-      : duration
-  );
+  var isVShowDirective = function (d) { return d.name === 'show'; };
 
-  if ("development" !== 'production' && explicitEnterDuration != null) {
-    checkDuration(explicitEnterDuration, 'enter', vnode);
-  }
+  var Transition = {
+    name: 'transition',
+    props: transitionProps,
+    abstract: true,
 
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(enterHook);
+    render: function render (h) {
+      var this$1 = this;
 
-  var cb = el._enterCb = once(function () {
-    if (expectsCSS) {
-      removeTransitionClass(el, toClass);
-      removeTransitionClass(el, activeClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, startClass);
+      var children = this.$slots.default;
+      if (!children) {
+        return
       }
-      enterCancelledHook && enterCancelledHook(el);
-    } else {
-      afterEnterHook && afterEnterHook(el);
-    }
-    el._enterCb = null;
-  });
 
-  if (!vnode.data.show) {
-    // remove pending leave element on enter by injecting an insert hook
-    mergeVNodeHook(vnode, 'insert', function () {
-      var parent = el.parentNode;
-      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
-      if (pendingNode &&
-        pendingNode.tag === vnode.tag &&
-        pendingNode.elm._leaveCb
-      ) {
-        pendingNode.elm._leaveCb();
+      // filter out text nodes (possible whitespaces)
+      children = children.filter(isNotTextNode);
+      /* istanbul ignore if */
+      if (!children.length) {
+        return
       }
-      enterHook && enterHook(el, cb);
-    });
-  }
 
-  // start enter transition
-  beforeEnterHook && beforeEnterHook(el);
-  if (expectsCSS) {
-    addTransitionClass(el, startClass);
-    addTransitionClass(el, activeClass);
-    nextFrame(function () {
-      addTransitionClass(el, toClass);
-      removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
-        }
+      // warn multiple elements
+      if (children.length > 1) {
+        warn(
+          '<transition> can only be used on a single element. Use ' +
+          '<transition-group> for lists.',
+          this.$parent
+        );
       }
-    });
-  }
 
-  if (vnode.data.show) {
-    toggleDisplay && toggleDisplay();
-    enterHook && enterHook(el, cb);
-  }
+      var mode = this.mode;
 
-  if (!expectsCSS && !userWantsControl) {
-    cb();
-  }
-}
+      // warn invalid mode
+      if (mode && mode !== 'in-out' && mode !== 'out-in'
+      ) {
+        warn(
+          'invalid <transition> mode: ' + mode,
+          this.$parent
+        );
+      }
 
-function leave (vnode, rm) {
-  var el = vnode.elm;
+      var rawChild = children[0];
 
-  // call enter callback now
-  if (isDef(el._enterCb)) {
-    el._enterCb.cancelled = true;
-    el._enterCb();
-  }
+      // if this is a component root node and the component's
+      // parent container node also has transition, skip.
+      if (hasParentTransition(this.$vnode)) {
+        return rawChild
+      }
 
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data) || el.nodeType !== 1) {
-    return rm()
-  }
+      // apply transition data to child
+      // use getRealChild() to ignore abstract components e.g. keep-alive
+      var child = getRealChild(rawChild);
+      /* istanbul ignore if */
+      if (!child) {
+        return rawChild
+      }
 
-  /* istanbul ignore if */
-  if (isDef(el._leaveCb)) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var leaveClass = data.leaveClass;
-  var leaveToClass = data.leaveToClass;
-  var leaveActiveClass = data.leaveActiveClass;
-  var beforeLeave = data.beforeLeave;
-  var leave = data.leave;
-  var afterLeave = data.afterLeave;
-  var leaveCancelled = data.leaveCancelled;
-  var delayLeave = data.delayLeave;
-  var duration = data.duration;
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(leave);
-
-  var explicitLeaveDuration = toNumber(
-    isObject(duration)
-      ? duration.leave
-      : duration
-  );
+      if (this._leaving) {
+        return placeholder(h, rawChild)
+      }
 
-  if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
-    checkDuration(explicitLeaveDuration, 'leave', vnode);
-  }
+      // ensure a key that is unique to the vnode type and to this transition
+      // component instance. This key will be used to remove pending leaving nodes
+      // during entering.
+      var id = "__transition-" + (this._uid) + "-";
+      child.key = child.key == null
+        ? child.isComment
+          ? id + 'comment'
+          : id + child.tag
+        : isPrimitive(child.key)
+          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+          : child.key;
 
-  var cb = el._leaveCb = once(function () {
-    if (el.parentNode && el.parentNode._pending) {
-      el.parentNode._pending[vnode.key] = null;
-    }
-    if (expectsCSS) {
-      removeTransitionClass(el, leaveToClass);
-      removeTransitionClass(el, leaveActiveClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, leaveClass);
-      }
-      leaveCancelled && leaveCancelled(el);
-    } else {
-      rm();
-      afterLeave && afterLeave(el);
-    }
-    el._leaveCb = null;
-  });
+      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+      var oldRawChild = this._vnode;
+      var oldChild = getRealChild(oldRawChild);
 
-  if (delayLeave) {
-    delayLeave(performLeave);
-  } else {
-    performLeave();
-  }
+      // mark v-show
+      // so that the transition module can hand over the control to the directive
+      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+        child.data.show = true;
+      }
 
-  function performLeave () {
-    // the delayed leave may have already been cancelled
-    if (cb.cancelled) {
-      return
-    }
-    // record leaving element
-    if (!vnode.data.show) {
-      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
-    }
-    beforeLeave && beforeLeave(el);
-    if (expectsCSS) {
-      addTransitionClass(el, leaveClass);
-      addTransitionClass(el, leaveActiveClass);
-      nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
-        removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
+      if (
+        oldChild &&
+        oldChild.data &&
+        !isSameChild(child, oldChild) &&
+        !isAsyncPlaceholder(oldChild) &&
+        // #6687 component root is a comment node
+        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+      ) {
+        // replace old child transition data with fresh one
+        // important for dynamic transitions!
+        var oldData = oldChild.data.transition = extend({}, data);
+        // handle transition mode
+        if (mode === 'out-in') {
+          // return placeholder node and queue update when leave finishes
+          this._leaving = true;
+          mergeVNodeHook(oldData, 'afterLeave', function () {
+            this$1._leaving = false;
+            this$1.$forceUpdate();
+          });
+          return placeholder(h, rawChild)
+        } else if (mode === 'in-out') {
+          if (isAsyncPlaceholder(child)) {
+            return oldRawChild
           }
+          var delayedLeave;
+          var performLeave = function () { delayedLeave(); };
+          mergeVNodeHook(data, 'afterEnter', performLeave);
+          mergeVNodeHook(data, 'enterCancelled', performLeave);
+          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
         }
-      });
-    }
-    leave && leave(el, cb);
-    if (!expectsCSS && !userWantsControl) {
-      cb();
-    }
-  }
-}
+      }
 
-// only used in dev mode
-function checkDuration (val, name, vnode) {
-  if (typeof val !== 'number') {
-    warn(
-      "<transition> explicit " + name + " duration is not a valid number - " +
-      "got " + (JSON.stringify(val)) + ".",
-      vnode.context
-    );
-  } else if (isNaN(val)) {
-    warn(
-      "<transition> explicit " + name + " duration is NaN - " +
-      'the duration expression might be incorrect.',
-      vnode.context
-    );
-  }
-}
+      return rawChild
+    }
+  };
 
-function isValidDuration (val) {
-  return typeof val === 'number' && !isNaN(val)
-}
+  /*  */
 
-/**
- * Normalize a transition hook's argument length. The hook may be:
- * - a merged hook (invoker) with the original in .fns
- * - a wrapped component method (check ._length)
- * - a plain function (.length)
- */
-function getHookArgumentsLength (fn) {
-  if (isUndef(fn)) {
-    return false
-  }
-  var invokerFns = fn.fns;
-  if (isDef(invokerFns)) {
-    // invoker
-    return getHookArgumentsLength(
-      Array.isArray(invokerFns)
-        ? invokerFns[0]
-        : invokerFns
-    )
-  } else {
-    return (fn._length || fn.length) > 1
-  }
-}
+  var props = extend({
+    tag: String,
+    moveClass: String
+  }, transitionProps);
 
-function _enter (_, vnode) {
-  if (vnode.data.show !== true) {
-    enter(vnode);
-  }
-}
+  delete props.mode;
 
-var transition = inBrowser ? {
-  create: _enter,
-  activate: _enter,
-  remove: function remove$$1 (vnode, rm) {
-    /* istanbul ignore else */
-    if (vnode.data.show !== true) {
-      leave(vnode, rm);
-    } else {
-      rm();
-    }
-  }
-} : {};
+  var TransitionGroup = {
+    props: props,
 
-var platformModules = [
-  attrs,
-  klass,
-  events,
-  domProps,
-  style,
-  transition
-];
+    beforeMount: function beforeMount () {
+      var this$1 = this;
 
-/*  */
+      var update = this._update;
+      this._update = function (vnode, hydrating) {
+        var restoreActiveInstance = setActiveInstance(this$1);
+        // force removing pass
+        this$1.__patch__(
+          this$1._vnode,
+          this$1.kept,
+          false, // hydrating
+          true // removeOnly (!important, avoids unnecessary moves)
+        );
+        this$1._vnode = this$1.kept;
+        restoreActiveInstance();
+        update.call(this$1, vnode, hydrating);
+      };
+    },
 
-// the directive module should be applied last, after all
-// built-in modules have been applied.
-var modules = platformModules.concat(baseModules);
+    render: function render (h) {
+      var tag = this.tag || this.$vnode.data.tag || 'span';
+      var map = Object.create(null);
+      var prevChildren = this.prevChildren = this.children;
+      var rawChildren = this.$slots.default || [];
+      var children = this.children = [];
+      var transitionData = extractTransitionData(this);
+
+      for (var i = 0; i < rawChildren.length; i++) {
+        var c = rawChildren[i];
+        if (c.tag) {
+          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+            children.push(c);
+            map[c.key] = c
+            ;(c.data || (c.data = {})).transition = transitionData;
+          } else {
+            var opts = c.componentOptions;
+            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+            warn(("<transition-group> children must be keyed: <" + name + ">"));
+          }
+        }
+      }
 
-var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+      if (prevChildren) {
+        var kept = [];
+        var removed = [];
+        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+          var c$1 = prevChildren[i$1];
+          c$1.data.transition = transitionData;
+          c$1.data.pos = c$1.elm.getBoundingClientRect();
+          if (map[c$1.key]) {
+            kept.push(c$1);
+          } else {
+            removed.push(c$1);
+          }
+        }
+        this.kept = h(tag, null, kept);
+        this.removed = removed;
+      }
 
-/**
- * Not type checking this file because flow doesn't like attaching
- * properties to Elements.
- */
+      return h(tag, null, children)
+    },
 
-/* istanbul ignore if */
-if (isIE9) {
-  // http://www.matts411.com/post/internet-explorer-9-oninput/
-  document.addEventListener('selectionchange', function () {
-    var el = document.activeElement;
-    if (el && el.vmodel) {
-      trigger(el, 'input');
-    }
-  });
-}
-
-var directive = {
-  inserted: function inserted (el, binding, vnode, oldVnode) {
-    if (vnode.tag === 'select') {
-      // #6903
-      if (oldVnode.elm && !oldVnode.elm._vOptions) {
-        mergeVNodeHook(vnode, 'postpatch', function () {
-          directive.componentUpdated(el, binding, vnode);
-        });
-      } else {
-        setSelected(el, binding, vnode.context);
+    updated: function updated () {
+      var children = this.prevChildren;
+      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+        return
       }
-      el._vOptions = [].map.call(el.options, getValue);
-    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
-      el._vModifiers = binding.modifiers;
-      if (!binding.modifiers.lazy) {
-        // Safari < 10.2 & UIWebView doesn't fire compositionend when
-        // switching focus before confirming composition choice
-        // this also fixes the issue where some browsers e.g. iOS Chrome
-        // fires "change" instead of "input" on autocomplete.
-        el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
+
+      // we divide the work into three loops to avoid mixing DOM reads and writes
+      // in each iteration - which helps prevent layout thrashing.
+      children.forEach(callPendingCbs);
+      children.forEach(recordPosition);
+      children.forEach(applyTranslation);
+
+      // force reflow to put everything in position
+      // assign to this to avoid being removed in tree-shaking
+      // $flow-disable-line
+      this._reflow = document.body.offsetHeight;
+
+      children.forEach(function (c) {
+        if (c.data.moved) {
+          var el = c.elm;
+          var s = el.style;
+          addTransitionClass(el, moveClass);
+          s.transform = s.WebkitTransform = s.transitionDuration = '';
+          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+            if (e && e.target !== el) {
+              return
+            }
+            if (!e || /transform$/.test(e.propertyName)) {
+              el.removeEventListener(transitionEndEvent, cb);
+              el._moveCb = null;
+              removeTransitionClass(el, moveClass);
+            }
+          });
+        }
+      });
+    },
+
+    methods: {
+      hasMove: function hasMove (el, moveClass) {
+        /* istanbul ignore if */
+        if (!hasTransition) {
+          return false
         }
         /* istanbul ignore if */
-        if (isIE9) {
-          el.vmodel = true;
+        if (this._hasMove) {
+          return this._hasMove
         }
+        // Detect whether an element with the move class applied has
+        // CSS transitions. Since the element may be inside an entering
+        // transition at this very moment, we make a clone of it and remove
+        // all other transition classes applied to ensure only the move class
+        // is applied.
+        var clone = el.cloneNode();
+        if (el._transitionClasses) {
+          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+        }
+        addClass(clone, moveClass);
+        clone.style.display = 'none';
+        this.$el.appendChild(clone);
+        var info = getTransitionInfo(clone);
+        this.$el.removeChild(clone);
+        return (this._hasMove = info.hasTransform)
       }
     }
-  },
+  };
 
-  componentUpdated: function componentUpdated (el, binding, vnode) {
-    if (vnode.tag === 'select') {
-      setSelected(el, binding, vnode.context);
-      // in case the options rendered by v-for have changed,
-      // it's possible that the value is out-of-sync with the rendered options.
-      // detect such cases and filter out values that no longer has a matching
-      // option in the DOM.
-      var prevOptions = el._vOptions;
-      var curOptions = el._vOptions = [].map.call(el.options, getValue);
-      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
-        // trigger change event if
-        // no matching option found for at least one value
-        var needReset = el.multiple
-          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
-          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
-        if (needReset) {
-          trigger(el, 'change');
-        }
-      }
+  function callPendingCbs (c) {
+    /* istanbul ignore if */
+    if (c.elm._moveCb) {
+      c.elm._moveCb();
+    }
+    /* istanbul ignore if */
+    if (c.elm._enterCb) {
+      c.elm._enterCb();
     }
   }
-};
 
-function setSelected (el, binding, vm) {
-  actuallySetSelected(el, binding, vm);
-  /* istanbul ignore if */
-  if (isIE || isEdge) {
-    setTimeout(function () {
-      actuallySetSelected(el, binding, vm);
-    }, 0);
+  function recordPosition (c) {
+    c.data.newPos = c.elm.getBoundingClientRect();
   }
-}
 
-function actuallySetSelected (el, binding, vm) {
-  var value = binding.value;
-  var isMultiple = el.multiple;
-  if (isMultiple && !Array.isArray(value)) {
-    "development" !== 'production' && warn(
-      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
-      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
-      vm
-    );
-    return
+  function applyTranslation (c) {
+    var oldPos = c.data.pos;
+    var newPos = c.data.newPos;
+    var dx = oldPos.left - newPos.left;
+    var dy = oldPos.top - newPos.top;
+    if (dx || dy) {
+      c.data.moved = true;
+      var s = c.elm.style;
+      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+      s.transitionDuration = '0s';
+    }
   }
-  var selected, option;
-  for (var i = 0, l = el.options.length; i < l; i++) {
-    option = el.options[i];
-    if (isMultiple) {
-      selected = looseIndexOf(value, getValue(option)) > -1;
-      if (option.selected !== selected) {
-        option.selected = selected;
-      }
-    } else {
-      if (looseEqual(getValue(option), value)) {
-        if (el.selectedIndex !== i) {
-          el.selectedIndex = i;
+
+  var platformComponents = {
+    Transition: Transition,
+    TransitionGroup: TransitionGroup
+  };
+
+  /*  */
+
+  // install platform specific utils
+  Vue.config.mustUseProp = mustUseProp;
+  Vue.config.isReservedTag = isReservedTag;
+  Vue.config.isReservedAttr = isReservedAttr;
+  Vue.config.getTagNamespace = getTagNamespace;
+  Vue.config.isUnknownElement = isUnknownElement;
+
+  // install platform runtime directives & components
+  extend(Vue.options.directives, platformDirectives);
+  extend(Vue.options.components, platformComponents);
+
+  // install platform patch function
+  Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+  // public mount method
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
+  ) {
+    el = el && inBrowser ? query(el) : undefined;
+    return mountComponent(this, el, hydrating)
+  };
+
+  // devtools global hook
+  /* istanbul ignore next */
+  if (inBrowser) {
+    setTimeout(function () {
+      if (config.devtools) {
+        if (devtools) {
+          devtools.emit('init', Vue);
+        } else {
+          console[console.info ? 'info' : 'log'](
+            'Download the Vue Devtools extension for a better development experience:\n' +
+            'https://github.com/vuejs/vue-devtools'
+          );
         }
-        return
       }
-    }
+      if (config.productionTip !== false &&
+        typeof console !== 'undefined'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          "You are running Vue in development mode.\n" +
+          "Make sure to turn on production mode when deploying for production.\n" +
+          "See more tips at https://vuejs.org/guide/deployment.html"
+        );
+      }
+    }, 0);
   }
-  if (!isMultiple) {
-    el.selectedIndex = -1;
-  }
-}
-
-function hasNoMatchingOption (value, options) {
-  return options.every(function (o) { return !looseEqual(o, value); })
-}
-
-function getValue (option) {
-  return '_value' in option
-    ? option._value
-    : option.value
-}
-
-function onCompositionStart (e) {
-  e.target.composing = true;
-}
-
-function onCompositionEnd (e) {
-  // prevent triggering an input event for no reason
-  if (!e.target.composing) { return }
-  e.target.composing = false;
-  trigger(e.target, 'input');
-}
-
-function trigger (el, type) {
-  var e = document.createEvent('HTMLEvents');
-  e.initEvent(type, true, true);
-  el.dispatchEvent(e);
-}
-
-/*  */
-
-// recursively search for possible transition defined inside the component root
-function locateNode (vnode) {
-  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
-    ? locateNode(vnode.componentInstance._vnode)
-    : vnode
-}
-
-var show = {
-  bind: function bind (el, ref, vnode) {
-    var value = ref.value;
-
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    var originalDisplay = el.__vOriginalDisplay =
-      el.style.display === 'none' ? '' : el.style.display;
-    if (value && transition$$1) {
-      vnode.data.show = true;
-      enter(vnode, function () {
-        el.style.display = originalDisplay;
-      });
-    } else {
-      el.style.display = value ? originalDisplay : 'none';
-    }
-  },
 
-  update: function update (el, ref, vnode) {
-    var value = ref.value;
-    var oldValue = ref.oldValue;
+  /*  */
+
+  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
-    /* istanbul ignore if */
-    if (value === oldValue) { return }
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    if (transition$$1) {
-      vnode.data.show = true;
-      if (value) {
-        enter(vnode, function () {
-          el.style.display = el.__vOriginalDisplay;
-        });
-      } else {
-        leave(vnode, function () {
-          el.style.display = 'none';
-        });
-      }
-    } else {
-      el.style.display = value ? el.__vOriginalDisplay : 'none';
-    }
-  },
+  var buildRegex = cached(function (delimiters) {
+    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+  });
 
-  unbind: function unbind (
-    el,
-    binding,
-    vnode,
-    oldVnode,
-    isDestroy
+
+
+  function parseText (
+    text,
+    delimiters
   ) {
-    if (!isDestroy) {
-      el.style.display = el.__vOriginalDisplay;
-    }
-  }
-};
-
-var platformDirectives = {
-  model: directive,
-  show: show
-};
-
-/*  */
-
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
-var transitionProps = {
-  name: String,
-  appear: Boolean,
-  css: Boolean,
-  mode: String,
-  type: String,
-  enterClass: String,
-  leaveClass: String,
-  enterToClass: String,
-  leaveToClass: String,
-  enterActiveClass: String,
-  leaveActiveClass: String,
-  appearClass: String,
-  appearActiveClass: String,
-  appearToClass: String,
-  duration: [Number, String, Object]
-};
-
-// in case the child is also an abstract component, e.g. <keep-alive>
-// we want to recursively retrieve the real component to be rendered
-function getRealChild (vnode) {
-  var compOptions = vnode && vnode.componentOptions;
-  if (compOptions && compOptions.Ctor.options.abstract) {
-    return getRealChild(getFirstComponentChild(compOptions.children))
-  } else {
-    return vnode
+    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+    if (!tagRE.test(text)) {
+      return
+    }
+    var tokens = [];
+    var rawTokens = [];
+    var lastIndex = tagRE.lastIndex = 0;
+    var match, index, tokenValue;
+    while ((match = tagRE.exec(text))) {
+      index = match.index;
+      // push text token
+      if (index > lastIndex) {
+        rawTokens.push(tokenValue = text.slice(lastIndex, index));
+        tokens.push(JSON.stringify(tokenValue));
+      }
+      // tag token
+      var exp = parseFilters(match[1].trim());
+      tokens.push(("_s(" + exp + ")"));
+      rawTokens.push({ '@binding': exp });
+      lastIndex = index + match[0].length;
+    }
+    if (lastIndex < text.length) {
+      rawTokens.push(tokenValue = text.slice(lastIndex));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    return {
+      expression: tokens.join('+'),
+      tokens: rawTokens
+    }
   }
-}
 
-function extractTransitionData (comp) {
-  var data = {};
-  var options = comp.$options;
-  // props
-  for (var key in options.propsData) {
-    data[key] = comp[key];
-  }
-  // events.
-  // extract listeners and pass them directly to the transition methods
-  var listeners = options._parentListeners;
-  for (var key$1 in listeners) {
-    data[camelize(key$1)] = listeners[key$1];
-  }
-  return data
-}
+  /*  */
 
-function placeholder (h, rawChild) {
-  if (/\d-keep-alive$/.test(rawChild.tag)) {
-    return h('keep-alive', {
-      props: rawChild.componentOptions.propsData
-    })
+  function transformNode (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticClass = getAndRemoveAttr(el, 'class');
+    if (staticClass) {
+      var res = parseText(staticClass, options.delimiters);
+      if (res) {
+        warn(
+          "class=\"" + staticClass + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div class="{{ val }}">, use <div :class="val">.',
+          el.rawAttrsMap['class']
+        );
+      }
+    }
+    if (staticClass) {
+      el.staticClass = JSON.stringify(staticClass);
+    }
+    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+    if (classBinding) {
+      el.classBinding = classBinding;
+    }
   }
-}
 
-function hasParentTransition (vnode) {
-  while ((vnode = vnode.parent)) {
-    if (vnode.data.transition) {
-      return true
+  function genData (el) {
+    var data = '';
+    if (el.staticClass) {
+      data += "staticClass:" + (el.staticClass) + ",";
     }
+    if (el.classBinding) {
+      data += "class:" + (el.classBinding) + ",";
+    }
+    return data
   }
-}
-
-function isSameChild (child, oldChild) {
-  return oldChild.key === child.key && oldChild.tag === child.tag
-}
 
-var Transition = {
-  name: 'transition',
-  props: transitionProps,
-  abstract: true,
+  var klass$1 = {
+    staticKeys: ['staticClass'],
+    transformNode: transformNode,
+    genData: genData
+  };
 
-  render: function render (h) {
-    var this$1 = this;
+  /*  */
 
-    var children = this.$slots.default;
-    if (!children) {
-      return
+  function transformNode$1 (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticStyle = getAndRemoveAttr(el, 'style');
+    if (staticStyle) {
+      /* istanbul ignore if */
+      {
+        var res = parseText(staticStyle, options.delimiters);
+        if (res) {
+          warn(
+            "style=\"" + staticStyle + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div style="{{ val }}">, use <div :style="val">.',
+            el.rawAttrsMap['style']
+          );
+        }
+      }
+      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
     }
 
-    // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
-    /* istanbul ignore if */
-    if (!children.length) {
-      return
+    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+    if (styleBinding) {
+      el.styleBinding = styleBinding;
     }
+  }
 
-    // warn multiple elements
-    if ("development" !== 'production' && children.length > 1) {
-      warn(
-        '<transition> can only be used on a single element. Use ' +
-        '<transition-group> for lists.',
-        this.$parent
-      );
+  function genData$1 (el) {
+    var data = '';
+    if (el.staticStyle) {
+      data += "staticStyle:" + (el.staticStyle) + ",";
+    }
+    if (el.styleBinding) {
+      data += "style:(" + (el.styleBinding) + "),";
     }
+    return data
+  }
 
-    var mode = this.mode;
+  var style$1 = {
+    staticKeys: ['staticStyle'],
+    transformNode: transformNode$1,
+    genData: genData$1
+  };
 
-    // warn invalid mode
-    if ("development" !== 'production' &&
-      mode && mode !== 'in-out' && mode !== 'out-in'
-    ) {
-      warn(
-        'invalid <transition> mode: ' + mode,
-        this.$parent
-      );
-    }
+  /*  */
 
-    var rawChild = children[0];
+  var decoder;
 
-    // if this is a component root node and the component's
-    // parent container node also has transition, skip.
-    if (hasParentTransition(this.$vnode)) {
-      return rawChild
+  var he = {
+    decode: function decode (html) {
+      decoder = decoder || document.createElement('div');
+      decoder.innerHTML = html;
+      return decoder.textContent
     }
+  };
 
-    // apply transition data to child
-    // use getRealChild() to ignore abstract components e.g. keep-alive
-    var child = getRealChild(rawChild);
-    /* istanbul ignore if */
-    if (!child) {
-      return rawChild
-    }
+  /*  */
 
-    if (this._leaving) {
-      return placeholder(h, rawChild)
-    }
+  var isUnaryTag = makeMap(
+    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+    'link,meta,param,source,track,wbr'
+  );
 
-    // ensure a key that is unique to the vnode type and to this transition
-    // component instance. This key will be used to remove pending leaving nodes
-    // during entering.
-    var id = "__transition-" + (this._uid) + "-";
-    child.key = child.key == null
-      ? child.isComment
-        ? id + 'comment'
-        : id + child.tag
-      : isPrimitive(child.key)
-        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-        : child.key;
+  // Elements that you can, intentionally, leave open
+  // (and which close themselves)
+  var canBeLeftOpenTag = makeMap(
+    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+  );
 
-    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-    var oldRawChild = this._vnode;
-    var oldChild = getRealChild(oldRawChild);
+  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+  var isNonPhrasingTag = makeMap(
+    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+    'title,tr,track'
+  );
 
-    // mark v-show
-    // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
-      child.data.show = true;
-    }
+  /**
+   * Not type-checking this file because it's mostly vendor code.
+   */
 
-    if (
-      oldChild &&
-      oldChild.data &&
-      !isSameChild(child, oldChild) &&
-      !isAsyncPlaceholder(oldChild) &&
-      // #6687 component root is a comment node
-      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
-    ) {
-      // replace old child transition data with fresh one
-      // important for dynamic transitions!
-      var oldData = oldChild.data.transition = extend({}, data);
-      // handle transition mode
-      if (mode === 'out-in') {
-        // return placeholder node and queue update when leave finishes
-        this._leaving = true;
-        mergeVNodeHook(oldData, 'afterLeave', function () {
-          this$1._leaving = false;
-          this$1.$forceUpdate();
-        });
-        return placeholder(h, rawChild)
-      } else if (mode === 'in-out') {
-        if (isAsyncPlaceholder(child)) {
-          return oldRawChild
-        }
-        var delayedLeave;
-        var performLeave = function () { delayedLeave(); };
-        mergeVNodeHook(data, 'afterEnter', performLeave);
-        mergeVNodeHook(data, 'enterCancelled', performLeave);
-        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
-      }
-    }
+  // Regular Expressions for parsing tags and attributes
+  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+  var startTagOpen = new RegExp(("^<" + qnameCapture));
+  var startTagClose = /^\s*(\/?)>/;
+  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+  var doctype = /^<!DOCTYPE [^>]+>/i;
+  // #7298: escape - to avoid being passed as HTML comment when inlined in page
+  var comment = /^<!\--/;
+  var conditionalComment = /^<!\[/;
+
+  // Special Elements (can contain anything)
+  var isPlainTextElement = makeMap('script,style,textarea', true);
+  var reCache = {};
+
+  var decodingMap = {
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&amp;': '&',
+    '&#10;': '\n',
+    '&#9;': '\t',
+    '&#39;': "'"
+  };
+  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+  // #5992
+  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+  function decodeAttr (value, shouldDecodeNewlines) {
+    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+    return value.replace(re, function (match) { return decodingMap[match]; })
+  }
+
+  function parseHTML (html, options) {
+    var stack = [];
+    var expectHTML = options.expectHTML;
+    var isUnaryTag$$1 = options.isUnaryTag || no;
+    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+    var index = 0;
+    var last, lastTag;
+    while (html) {
+      last = html;
+      // Make sure we're not in a plaintext content element like script/style
+      if (!lastTag || !isPlainTextElement(lastTag)) {
+        var textEnd = html.indexOf('<');
+        if (textEnd === 0) {
+          // Comment:
+          if (comment.test(html)) {
+            var commentEnd = html.indexOf('-->');
+
+            if (commentEnd >= 0) {
+              if (options.shouldKeepComment) {
+                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+              }
+              advance(commentEnd + 3);
+              continue
+            }
+          }
 
-    return rawChild
-  }
-};
+          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+          if (conditionalComment.test(html)) {
+            var conditionalEnd = html.indexOf(']>');
 
-/*  */
+            if (conditionalEnd >= 0) {
+              advance(conditionalEnd + 2);
+              continue
+            }
+          }
+
+          // Doctype:
+          var doctypeMatch = html.match(doctype);
+          if (doctypeMatch) {
+            advance(doctypeMatch[0].length);
+            continue
+          }
 
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
+          // End tag:
+          var endTagMatch = html.match(endTag);
+          if (endTagMatch) {
+            var curIndex = index;
+            advance(endTagMatch[0].length);
+            parseEndTag(endTagMatch[1], curIndex, index);
+            continue
+          }
 
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
+          // Start tag:
+          var startTagMatch = parseStartTag();
+          if (startTagMatch) {
+            handleStartTag(startTagMatch);
+            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+              advance(1);
+            }
+            continue
+          }
+        }
 
-var props = extend({
-  tag: String,
-  moveClass: String
-}, transitionProps);
+        var text = (void 0), rest = (void 0), next = (void 0);
+        if (textEnd >= 0) {
+          rest = html.slice(textEnd);
+          while (
+            !endTag.test(rest) &&
+            !startTagOpen.test(rest) &&
+            !comment.test(rest) &&
+            !conditionalComment.test(rest)
+          ) {
+            // < in plain text, be forgiving and treat it as text
+            next = rest.indexOf('<', 1);
+            if (next < 0) { break }
+            textEnd += next;
+            rest = html.slice(textEnd);
+          }
+          text = html.substring(0, textEnd);
+        }
 
-delete props.mode;
+        if (textEnd < 0) {
+          text = html;
+        }
 
-var TransitionGroup = {
-  props: props,
+        if (text) {
+          advance(text.length);
+        }
 
-  render: function render (h) {
-    var tag = this.tag || this.$vnode.data.tag || 'span';
-    var map = Object.create(null);
-    var prevChildren = this.prevChildren = this.children;
-    var rawChildren = this.$slots.default || [];
-    var children = this.children = [];
-    var transitionData = extractTransitionData(this);
-
-    for (var i = 0; i < rawChildren.length; i++) {
-      var c = rawChildren[i];
-      if (c.tag) {
-        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
-          children.push(c);
-          map[c.key] = c
-          ;(c.data || (c.data = {})).transition = transitionData;
-        } else {
-          var opts = c.componentOptions;
-          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        if (options.chars && text) {
+          options.chars(text, index - text.length, index);
         }
+      } else {
+        var endTagLength = 0;
+        var stackedTag = lastTag.toLowerCase();
+        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+          endTagLength = endTag.length;
+          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+            text = text
+              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+          }
+          if (shouldIgnoreFirstNewline(stackedTag, text)) {
+            text = text.slice(1);
+          }
+          if (options.chars) {
+            options.chars(text);
+          }
+          return ''
+        });
+        index += html.length - rest$1.length;
+        html = rest$1;
+        parseEndTag(stackedTag, index - endTagLength, index);
       }
-    }
 
-    if (prevChildren) {
-      var kept = [];
-      var removed = [];
-      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
-        var c$1 = prevChildren[i$1];
-        c$1.data.transition = transitionData;
-        c$1.data.pos = c$1.elm.getBoundingClientRect();
-        if (map[c$1.key]) {
-          kept.push(c$1);
-        } else {
-          removed.push(c$1);
+      if (html === last) {
+        options.chars && options.chars(html);
+        if (!stack.length && options.warn) {
+          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
         }
+        break
       }
-      this.kept = h(tag, null, kept);
-      this.removed = removed;
     }
 
-    return h(tag, null, children)
-  },
+    // Clean up any remaining tags
+    parseEndTag();
 
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
+    function advance (n) {
+      index += n;
+      html = html.substring(n);
+    }
 
-  updated: function updated () {
-    var children = this.prevChildren;
-    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
-    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
-      return
+    function parseStartTag () {
+      var start = html.match(startTagOpen);
+      if (start) {
+        var match = {
+          tagName: start[1],
+          attrs: [],
+          start: index
+        };
+        advance(start[0].length);
+        var end, attr;
+        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+          attr.start = index;
+          advance(attr[0].length);
+          attr.end = index;
+          match.attrs.push(attr);
+        }
+        if (end) {
+          match.unarySlash = end[1];
+          advance(end[0].length);
+          match.end = index;
+          return match
+        }
+      }
     }
 
-    // we divide the work into three loops to avoid mixing DOM reads and writes
-    // in each iteration - which helps prevent layout thrashing.
-    children.forEach(callPendingCbs);
-    children.forEach(recordPosition);
-    children.forEach(applyTranslation);
+    function handleStartTag (match) {
+      var tagName = match.tagName;
+      var unarySlash = match.unarySlash;
 
-    // force reflow to put everything in position
-    // assign to this to avoid being removed in tree-shaking
-    // $flow-disable-line
-    this._reflow = document.body.offsetHeight;
-
-    children.forEach(function (c) {
-      if (c.data.moved) {
-        var el = c.elm;
-        var s = el.style;
-        addTransitionClass(el, moveClass);
-        s.transform = s.WebkitTransform = s.transitionDuration = '';
-        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
-          if (!e || /transform$/.test(e.propertyName)) {
-            el.removeEventListener(transitionEndEvent, cb);
-            el._moveCb = null;
-            removeTransitionClass(el, moveClass);
-          }
-        });
+      if (expectHTML) {
+        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+          parseEndTag(lastTag);
+        }
+        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+          parseEndTag(tagName);
+        }
       }
-    });
-  },
 
-  methods: {
-    hasMove: function hasMove (el, moveClass) {
-      /* istanbul ignore if */
-      if (!hasTransition) {
-        return false
+      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+      var l = match.attrs.length;
+      var attrs = new Array(l);
+      for (var i = 0; i < l; i++) {
+        var args = match.attrs[i];
+        var value = args[3] || args[4] || args[5] || '';
+        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+          ? options.shouldDecodeNewlinesForHref
+          : options.shouldDecodeNewlines;
+        attrs[i] = {
+          name: args[1],
+          value: decodeAttr(value, shouldDecodeNewlines)
+        };
+        if (options.outputSourceRange) {
+          attrs[i].start = args.start + args[0].match(/^\s*/).length;
+          attrs[i].end = args.end;
+        }
       }
-      /* istanbul ignore if */
-      if (this._hasMove) {
-        return this._hasMove
+
+      if (!unary) {
+        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+        lastTag = tagName;
       }
-      // Detect whether an element with the move class applied has
-      // CSS transitions. Since the element may be inside an entering
-      // transition at this very moment, we make a clone of it and remove
-      // all other transition classes applied to ensure only the move class
-      // is applied.
-      var clone = el.cloneNode();
-      if (el._transitionClasses) {
-        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+
+      if (options.start) {
+        options.start(tagName, attrs, unary, match.start, match.end);
       }
-      addClass(clone, moveClass);
-      clone.style.display = 'none';
-      this.$el.appendChild(clone);
-      var info = getTransitionInfo(clone);
-      this.$el.removeChild(clone);
-      return (this._hasMove = info.hasTransform)
     }
-  }
-};
 
-function callPendingCbs (c) {
-  /* istanbul ignore if */
-  if (c.elm._moveCb) {
-    c.elm._moveCb();
-  }
-  /* istanbul ignore if */
-  if (c.elm._enterCb) {
-    c.elm._enterCb();
-  }
-}
-
-function recordPosition (c) {
-  c.data.newPos = c.elm.getBoundingClientRect();
-}
-
-function applyTranslation (c) {
-  var oldPos = c.data.pos;
-  var newPos = c.data.newPos;
-  var dx = oldPos.left - newPos.left;
-  var dy = oldPos.top - newPos.top;
-  if (dx || dy) {
-    c.data.moved = true;
-    var s = c.elm.style;
-    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
-    s.transitionDuration = '0s';
-  }
-}
-
-var platformComponents = {
-  Transition: Transition,
-  TransitionGroup: TransitionGroup
-};
-
-/*  */
-
-// install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
-
-// install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
-
-// install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
-
-// public mount method
-Vue$3.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && inBrowser ? query(el) : undefined;
-  return mountComponent(this, el, hydrating)
-};
-
-// devtools global hook
-/* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if ("development" !== 'production' && isChrome) {
-      console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
-      );
-    }
-  }
-  if ("development" !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
-  }
-}, 0);
+    function parseEndTag (tagName, start, end) {
+      var pos, lowerCasedTagName;
+      if (start == null) { start = index; }
+      if (end == null) { end = index; }
 
-/*  */
+      // Find the closest opened tag of the same type
+      if (tagName) {
+        lowerCasedTagName = tagName.toLowerCase();
+        for (pos = stack.length - 1; pos >= 0; pos--) {
+          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+            break
+          }
+        }
+      } else {
+        // If no tag name is provided, clean shop
+        pos = 0;
+      }
+
+      if (pos >= 0) {
+        // Close all the open elements, up the stack
+        for (var i = stack.length - 1; i >= pos; i--) {
+          if (i > pos || !tagName &&
+            options.warn
+          ) {
+            options.warn(
+              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+              { start: stack[i].start, end: stack[i].end }
+            );
+          }
+          if (options.end) {
+            options.end(stack[i].tag, start, end);
+          }
+        }
 
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
-var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+        // Remove the open elements from the stack
+        stack.length = pos;
+        lastTag = pos && stack[pos - 1].tag;
+      } else if (lowerCasedTagName === 'br') {
+        if (options.start) {
+          options.start(tagName, [], true, start, end);
+        }
+      } else if (lowerCasedTagName === 'p') {
+        if (options.start) {
+          options.start(tagName, [], false, start, end);
+        }
+        if (options.end) {
+          options.end(tagName, start, end);
+        }
+      }
+    }
+  }
 
-var buildRegex = cached(function (delimiters) {
-  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
-  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
-  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-});
+  /*  */
 
+  var onRE = /^@|^v-on:/;
+  var dirRE = /^v-|^@|^:|^#/;
+  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+  var stripParensRE = /^\(|\)$/g;
+  var dynamicArgRE = /^\[.*\]$/;
 
+  var argRE = /:(.*)$/;
+  var bindRE = /^:|^\.|^v-bind:/;
+  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
 
-function parseText (
-  text,
-  delimiters
-) {
-  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-  if (!tagRE.test(text)) {
-    return
-  }
-  var tokens = [];
-  var rawTokens = [];
-  var lastIndex = tagRE.lastIndex = 0;
-  var match, index, tokenValue;
-  while ((match = tagRE.exec(text))) {
-    index = match.index;
-    // push text token
-    if (index > lastIndex) {
-      rawTokens.push(tokenValue = text.slice(lastIndex, index));
-      tokens.push(JSON.stringify(tokenValue));
-    }
-    // tag token
-    var exp = parseFilters(match[1].trim());
-    tokens.push(("_s(" + exp + ")"));
-    rawTokens.push({ '@binding': exp });
-    lastIndex = index + match[0].length;
-  }
-  if (lastIndex < text.length) {
-    rawTokens.push(tokenValue = text.slice(lastIndex));
-    tokens.push(JSON.stringify(tokenValue));
-  }
-  return {
-    expression: tokens.join('+'),
-    tokens: rawTokens
-  }
-}
+  var slotRE = /^v-slot(:|$)|^#/;
 
-/*  */
+  var lineBreakRE = /[\r\n]/;
+  var whitespaceRE$1 = /[ \f\t\r\n]+/g;
 
-function transformNode (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticClass = getAndRemoveAttr(el, 'class');
-  if ("development" !== 'production' && staticClass) {
-    var res = parseText(staticClass, options.delimiters);
-    if (res) {
-      warn(
-        "class=\"" + staticClass + "\": " +
-        'Interpolation inside attributes has been removed. ' +
-        'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
-      );
-    }
-  }
-  if (staticClass) {
-    el.staticClass = JSON.stringify(staticClass);
-  }
-  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-  if (classBinding) {
-    el.classBinding = classBinding;
-  }
-}
+  var invalidAttributeRE = /[\s"'<>\/=]/;
 
-function genData (el) {
-  var data = '';
-  if (el.staticClass) {
-    data += "staticClass:" + (el.staticClass) + ",";
-  }
-  if (el.classBinding) {
-    data += "class:" + (el.classBinding) + ",";
-  }
-  return data
-}
+  var decodeHTMLCached = cached(he.decode);
 
-var klass$1 = {
-  staticKeys: ['staticClass'],
-  transformNode: transformNode,
-  genData: genData
-};
+  var emptySlotScopeToken = "_empty_";
 
-/*  */
+  // configurable state
+  var warn$2;
+  var delimiters;
+  var transforms;
+  var preTransforms;
+  var postTransforms;
+  var platformIsPreTag;
+  var platformMustUseProp;
+  var platformGetTagNamespace;
+  var maybeComponent;
 
-function transformNode$1 (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticStyle = getAndRemoveAttr(el, 'style');
-  if (staticStyle) {
-    /* istanbul ignore if */
-    {
-      var res = parseText(staticStyle, options.delimiters);
-      if (res) {
-        warn(
-          "style=\"" + staticStyle + "\": " +
-          'Interpolation inside attributes has been removed. ' +
-          'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
-        );
-      }
+  function createASTElement (
+    tag,
+    attrs,
+    parent
+  ) {
+    return {
+      type: 1,
+      tag: tag,
+      attrsList: attrs,
+      attrsMap: makeAttrsMap(attrs),
+      rawAttrsMap: {},
+      parent: parent,
+      children: []
     }
-    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
-  }
-
-  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-  if (styleBinding) {
-    el.styleBinding = styleBinding;
   }
-}
 
-function genData$1 (el) {
-  var data = '';
-  if (el.staticStyle) {
-    data += "staticStyle:" + (el.staticStyle) + ",";
-  }
-  if (el.styleBinding) {
-    data += "style:(" + (el.styleBinding) + "),";
-  }
-  return data
-}
+  /**
+   * Convert HTML string to AST.
+   */
+  function parse (
+    template,
+    options
+  ) {
+    warn$2 = options.warn || baseWarn;
+
+    platformIsPreTag = options.isPreTag || no;
+    platformMustUseProp = options.mustUseProp || no;
+    platformGetTagNamespace = options.getTagNamespace || no;
+    var isReservedTag = options.isReservedTag || no;
+    maybeComponent = function (el) { return !!(
+      el.component ||
+      el.attrsMap[':is'] ||
+      el.attrsMap['v-bind:is'] ||
+      !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+    ); };
+    transforms = pluckModuleFunction(options.modules, 'transformNode');
+    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+    delimiters = options.delimiters;
+
+    var stack = [];
+    var preserveWhitespace = options.preserveWhitespace !== false;
+    var whitespaceOption = options.whitespace;
+    var root;
+    var currentParent;
+    var inVPre = false;
+    var inPre = false;
+    var warned = false;
+
+    function warnOnce (msg, range) {
+      if (!warned) {
+        warned = true;
+        warn$2(msg, range);
+      }
+    }
+
+    function closeElement (element) {
+      trimEndingWhitespace(element);
+      if (!inVPre && !element.processed) {
+        element = processElement(element, options);
+      }
+      // tree management
+      if (!stack.length && element !== root) {
+        // allow root elements with v-if, v-else-if and v-else
+        if (root.if && (element.elseif || element.else)) {
+          {
+            checkRootConstraints(element);
+          }
+          addIfCondition(root, {
+            exp: element.elseif,
+            block: element
+          });
+        } else {
+          warnOnce(
+            "Component template should contain exactly one root element. " +
+            "If you are using v-if on multiple elements, " +
+            "use v-else-if to chain them instead.",
+            { start: element.start }
+          );
+        }
+      }
+      if (currentParent && !element.forbidden) {
+        if (element.elseif || element.else) {
+          processIfConditions(element, currentParent);
+        } else {
+          if (element.slotScope) {
+            // scoped slot
+            // keep it in the children list so that v-else(-if) conditions can
+            // find it as the prev node.
+            var name = element.slotTarget || '"default"'
+            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+          }
+          currentParent.children.push(element);
+          element.parent = currentParent;
+        }
+      }
 
-var style$1 = {
-  staticKeys: ['staticStyle'],
-  transformNode: transformNode$1,
-  genData: genData$1
-};
+      // final children cleanup
+      // filter out scoped slots
+      element.children = element.children.filter(function (c) { return !(c).slotScope; });
+      // remove trailing whitespace node again
+      trimEndingWhitespace(element);
 
-/*  */
+      // check pre state
+      if (element.pre) {
+        inVPre = false;
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = false;
+      }
+      // apply post-transforms
+      for (var i = 0; i < postTransforms.length; i++) {
+        postTransforms[i](element, options);
+      }
+    }
 
-var decoder;
+    function trimEndingWhitespace (el) {
+      // remove trailing whitespace node
+      if (!inPre) {
+        var lastNode;
+        while (
+          (lastNode = el.children[el.children.length - 1]) &&
+          lastNode.type === 3 &&
+          lastNode.text === ' '
+        ) {
+          el.children.pop();
+        }
+      }
+    }
 
-var he = {
-  decode: function decode (html) {
-    decoder = decoder || document.createElement('div');
-    decoder.innerHTML = html;
-    return decoder.textContent
-  }
-};
+    function checkRootConstraints (el) {
+      if (el.tag === 'slot' || el.tag === 'template') {
+        warnOnce(
+          "Cannot use <" + (el.tag) + "> as component root element because it may " +
+          'contain multiple nodes.',
+          { start: el.start }
+        );
+      }
+      if (el.attrsMap.hasOwnProperty('v-for')) {
+        warnOnce(
+          'Cannot use v-for on stateful component root element because ' +
+          'it renders multiple elements.',
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
 
-/*  */
+    parseHTML(template, {
+      warn: warn$2,
+      expectHTML: options.expectHTML,
+      isUnaryTag: options.isUnaryTag,
+      canBeLeftOpenTag: options.canBeLeftOpenTag,
+      shouldDecodeNewlines: options.shouldDecodeNewlines,
+      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+      shouldKeepComment: options.comments,
+      outputSourceRange: options.outputSourceRange,
+      start: function start (tag, attrs, unary, start$1, end) {
+        // check namespace.
+        // inherit parent ns if there is one
+        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
 
-var isUnaryTag = makeMap(
-  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
-  'link,meta,param,source,track,wbr'
-);
+        // handle IE svg bug
+        /* istanbul ignore if */
+        if (isIE && ns === 'svg') {
+          attrs = guardIESVGBug(attrs);
+        }
 
-// Elements that you can, intentionally, leave open
-// (and which close themselves)
-var canBeLeftOpenTag = makeMap(
-  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
-);
+        var element = createASTElement(tag, attrs, currentParent);
+        if (ns) {
+          element.ns = ns;
+        }
 
-// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
-// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
-var isNonPhrasingTag = makeMap(
-  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
-  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
-  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
-  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
-  'title,tr,track'
-);
+        {
+          if (options.outputSourceRange) {
+            element.start = start$1;
+            element.end = end;
+            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+              cumulated[attr.name] = attr;
+              return cumulated
+            }, {});
+          }
+          attrs.forEach(function (attr) {
+            if (invalidAttributeRE.test(attr.name)) {
+              warn$2(
+                "Invalid dynamic argument expression: attribute names cannot contain " +
+                "spaces, quotes, <, >, / or =.",
+                {
+                  start: attr.start + attr.name.indexOf("["),
+                  end: attr.start + attr.name.length
+                }
+              );
+            }
+          });
+        }
 
-/**
- * Not type-checking this file because it's mostly vendor code.
- */
+        if (isForbiddenTag(element) && !isServerRendering()) {
+          element.forbidden = true;
+          warn$2(
+            'Templates should only be responsible for mapping the state to the ' +
+            'UI. Avoid placing tags with side-effects in your templates, such as ' +
+            "<" + tag + ">" + ', as they will not be parsed.',
+            { start: element.start }
+          );
+        }
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
+        // apply pre-transforms
+        for (var i = 0; i < preTransforms.length; i++) {
+          element = preTransforms[i](element, options) || element;
+        }
 
-// Regular Expressions for parsing tags and attributes
-var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
-var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
-var startTagOpen = new RegExp(("^<" + qnameCapture));
-var startTagClose = /^\s*(\/?)>/;
-var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
-var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
-var conditionalComment = /^<!\[/;
-
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
-// Special Elements (can contain anything)
-var isPlainTextElement = makeMap('script,style,textarea', true);
-var reCache = {};
-
-var decodingMap = {
-  '&lt;': '<',
-  '&gt;': '>',
-  '&quot;': '"',
-  '&amp;': '&',
-  '&#10;': '\n',
-  '&#9;': '\t'
-};
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
-
-// #5992
-var isIgnoreNewlineTag = makeMap('pre,textarea', true);
-var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
-
-function decodeAttr (value, shouldDecodeNewlines) {
-  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-  return value.replace(re, function (match) { return decodingMap[match]; })
-}
-
-function parseHTML (html, options) {
-  var stack = [];
-  var expectHTML = options.expectHTML;
-  var isUnaryTag$$1 = options.isUnaryTag || no;
-  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-  var index = 0;
-  var last, lastTag;
-  while (html) {
-    last = html;
-    // Make sure we're not in a plaintext content element like script/style
-    if (!lastTag || !isPlainTextElement(lastTag)) {
-      var textEnd = html.indexOf('<');
-      if (textEnd === 0) {
-        // Comment:
-        if (comment.test(html)) {
-          var commentEnd = html.indexOf('-->');
-
-          if (commentEnd >= 0) {
-            if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
-            }
-            advance(commentEnd + 3);
-            continue
+        if (!inVPre) {
+          processPre(element);
+          if (element.pre) {
+            inVPre = true;
           }
         }
+        if (platformIsPreTag(element.tag)) {
+          inPre = true;
+        }
+        if (inVPre) {
+          processRawAttrs(element);
+        } else if (!element.processed) {
+          // structural directives
+          processFor(element);
+          processIf(element);
+          processOnce(element);
+        }
 
-        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
-        if (conditionalComment.test(html)) {
-          var conditionalEnd = html.indexOf(']>');
-
-          if (conditionalEnd >= 0) {
-            advance(conditionalEnd + 2);
-            continue
+        if (!root) {
+          root = element;
+          {
+            checkRootConstraints(root);
           }
         }
 
-        // Doctype:
-        var doctypeMatch = html.match(doctype);
-        if (doctypeMatch) {
-          advance(doctypeMatch[0].length);
-          continue
+        if (!unary) {
+          currentParent = element;
+          stack.push(element);
+        } else {
+          closeElement(element);
         }
-
-        // End tag:
-        var endTagMatch = html.match(endTag);
-        if (endTagMatch) {
-          var curIndex = index;
-          advance(endTagMatch[0].length);
-          parseEndTag(endTagMatch[1], curIndex, index);
-          continue
+      },
+
+      end: function end (tag, start, end$1) {
+        var element = stack[stack.length - 1];
+        // pop stack
+        stack.length -= 1;
+        currentParent = stack[stack.length - 1];
+        if (options.outputSourceRange) {
+          element.end = end$1;
         }
-
-        // Start tag:
-        var startTagMatch = parseStartTag();
-        if (startTagMatch) {
-          handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
-            advance(1);
+        closeElement(element);
+      },
+
+      chars: function chars (text, start, end) {
+        if (!currentParent) {
+          {
+            if (text === template) {
+              warnOnce(
+                'Component template requires a root element, rather than just text.',
+                { start: start }
+              );
+            } else if ((text = text.trim())) {
+              warnOnce(
+                ("text \"" + text + "\" outside root element will be ignored."),
+                { start: start }
+              );
+            }
           }
-          continue
+          return
         }
-      }
-
-      var text = (void 0), rest = (void 0), next = (void 0);
-      if (textEnd >= 0) {
-        rest = html.slice(textEnd);
-        while (
-          !endTag.test(rest) &&
-          !startTagOpen.test(rest) &&
-          !comment.test(rest) &&
-          !conditionalComment.test(rest)
+        // IE textarea placeholder bug
+        /* istanbul ignore if */
+        if (isIE &&
+          currentParent.tag === 'textarea' &&
+          currentParent.attrsMap.placeholder === text
         ) {
-          // < in plain text, be forgiving and treat it as text
-          next = rest.indexOf('<', 1);
-          if (next < 0) { break }
-          textEnd += next;
-          rest = html.slice(textEnd);
+          return
+        }
+        var children = currentParent.children;
+        if (inPre || text.trim()) {
+          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+        } else if (!children.length) {
+          // remove the whitespace-only node right after an opening tag
+          text = '';
+        } else if (whitespaceOption) {
+          if (whitespaceOption === 'condense') {
+            // in condense mode, remove the whitespace node if it contains
+            // line break, otherwise condense to a single space
+            text = lineBreakRE.test(text) ? '' : ' ';
+          } else {
+            text = ' ';
+          }
+        } else {
+          text = preserveWhitespace ? ' ' : '';
+        }
+        if (text) {
+          if (!inPre && whitespaceOption === 'condense') {
+            // condense consecutive whitespaces into single space
+            text = text.replace(whitespaceRE$1, ' ');
+          }
+          var res;
+          var child;
+          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+            child = {
+              type: 2,
+              expression: res.expression,
+              tokens: res.tokens,
+              text: text
+            };
+          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+            child = {
+              type: 3,
+              text: text
+            };
+          }
+          if (child) {
+            if (options.outputSourceRange) {
+              child.start = start;
+              child.end = end;
+            }
+            children.push(child);
+          }
+        }
+      },
+      comment: function comment (text, start, end) {
+        // adding anything as a sibling to the root node is forbidden
+        // comments should still be allowed, but ignored
+        if (currentParent) {
+          var child = {
+            type: 3,
+            text: text,
+            isComment: true
+          };
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          currentParent.children.push(child);
         }
-        text = html.substring(0, textEnd);
-        advance(textEnd);
-      }
-
-      if (textEnd < 0) {
-        text = html;
-        html = '';
       }
+    });
+    return root
+  }
 
-      if (options.chars && text) {
-        options.chars(text);
-      }
-    } else {
-      var endTagLength = 0;
-      var stackedTag = lastTag.toLowerCase();
-      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
-        endTagLength = endTag.length;
-        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
-          text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
-            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
-        }
-        if (shouldIgnoreFirstNewline(stackedTag, text)) {
-          text = text.slice(1);
-        }
-        if (options.chars) {
-          options.chars(text);
-        }
-        return ''
-      });
-      index += html.length - rest$1.length;
-      html = rest$1;
-      parseEndTag(stackedTag, index - endTagLength, index);
+  function processPre (el) {
+    if (getAndRemoveAttr(el, 'v-pre') != null) {
+      el.pre = true;
     }
+  }
 
-    if (html === last) {
-      options.chars && options.chars(html);
-      if ("development" !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+  function processRawAttrs (el) {
+    var list = el.attrsList;
+    var len = list.length;
+    if (len) {
+      var attrs = el.attrs = new Array(len);
+      for (var i = 0; i < len; i++) {
+        attrs[i] = {
+          name: list[i].name,
+          value: JSON.stringify(list[i].value)
+        };
+        if (list[i].start != null) {
+          attrs[i].start = list[i].start;
+          attrs[i].end = list[i].end;
+        }
       }
-      break
+    } else if (!el.pre) {
+      // non root node in pre blocks with no attributes
+      el.plain = true;
     }
   }
 
-  // Clean up any remaining tags
-  parseEndTag();
+  function processElement (
+    element,
+    options
+  ) {
+    processKey(element);
+
+    // determine whether this is a plain element after
+    // removing structural attributes
+    element.plain = (
+      !element.key &&
+      !element.scopedSlots &&
+      !element.attrsList.length
+    );
 
-  function advance (n) {
-    index += n;
-    html = html.substring(n);
+    processRef(element);
+    processSlotContent(element);
+    processSlotOutlet(element);
+    processComponent(element);
+    for (var i = 0; i < transforms.length; i++) {
+      element = transforms[i](element, options) || element;
+    }
+    processAttrs(element);
+    return element
   }
 
-  function parseStartTag () {
-    var start = html.match(startTagOpen);
-    if (start) {
-      var match = {
-        tagName: start[1],
-        attrs: [],
-        start: index
-      };
-      advance(start[0].length);
-      var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
-        advance(attr[0].length);
-        match.attrs.push(attr);
-      }
-      if (end) {
-        match.unarySlash = end[1];
-        advance(end[0].length);
-        match.end = index;
-        return match
+  function processKey (el) {
+    var exp = getBindingAttr(el, 'key');
+    if (exp) {
+      {
+        if (el.tag === 'template') {
+          warn$2(
+            "<template> cannot be keyed. Place the key on real elements instead.",
+            getRawBindingAttr(el, 'key')
+          );
+        }
+        if (el.for) {
+          var iterator = el.iterator2 || el.iterator1;
+          var parent = el.parent;
+          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+            warn$2(
+              "Do not use v-for index as key on <transition-group> children, " +
+              "this is the same as not using keys.",
+              getRawBindingAttr(el, 'key'),
+              true /* tip */
+            );
+          }
+        }
       }
+      el.key = exp;
     }
   }
 
-  function handleStartTag (match) {
-    var tagName = match.tagName;
-    var unarySlash = match.unarySlash;
-
-    if (expectHTML) {
-      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-        parseEndTag(lastTag);
-      }
-      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-        parseEndTag(tagName);
-      }
+  function processRef (el) {
+    var ref = getBindingAttr(el, 'ref');
+    if (ref) {
+      el.ref = ref;
+      el.refInFor = checkInFor(el);
     }
+  }
 
-    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
-
-    var l = match.attrs.length;
-    var attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
+  function processFor (el) {
+    var exp;
+    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+      var res = parseFor(exp);
+      if (res) {
+        extend(el, res);
+      } else {
+        warn$2(
+          ("Invalid v-for expression: " + exp),
+          el.rawAttrsMap['v-for']
+        );
       }
-      var value = args[3] || args[4] || args[5] || '';
-      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
-        ? options.shouldDecodeNewlinesForHref
-        : options.shouldDecodeNewlines;
-      attrs[i] = {
-        name: args[1],
-        value: decodeAttr(value, shouldDecodeNewlines)
-      };
-    }
-
-    if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
-      lastTag = tagName;
-    }
-
-    if (options.start) {
-      options.start(tagName, attrs, unary, match.start, match.end);
     }
   }
 
-  function parseEndTag (tagName, start, end) {
-    var pos, lowerCasedTagName;
-    if (start == null) { start = index; }
-    if (end == null) { end = index; }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
 
-    // Find the closest opened tag of the same type
-    if (tagName) {
-      for (pos = stack.length - 1; pos >= 0; pos--) {
-        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
-          break
-        }
+  function parseFor (exp) {
+    var inMatch = exp.match(forAliasRE);
+    if (!inMatch) { return }
+    var res = {};
+    res.for = inMatch[2].trim();
+    var alias = inMatch[1].trim().replace(stripParensRE, '');
+    var iteratorMatch = alias.match(forIteratorRE);
+    if (iteratorMatch) {
+      res.alias = alias.replace(forIteratorRE, '').trim();
+      res.iterator1 = iteratorMatch[1].trim();
+      if (iteratorMatch[2]) {
+        res.iterator2 = iteratorMatch[2].trim();
       }
     } else {
-      // If no tag name is provided, clean shop
-      pos = 0;
+      res.alias = alias;
     }
+    return res
+  }
 
-    if (pos >= 0) {
-      // Close all the open elements, up the stack
-      for (var i = stack.length - 1; i >= pos; i--) {
-        if ("development" !== 'production' &&
-          (i > pos || !tagName) &&
-          options.warn
-        ) {
-          options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
-          );
-        }
-        if (options.end) {
-          options.end(stack[i].tag, start, end);
-        }
-      }
-
-      // Remove the open elements from the stack
-      stack.length = pos;
-      lastTag = pos && stack[pos - 1].tag;
-    } else if (lowerCasedTagName === 'br') {
-      if (options.start) {
-        options.start(tagName, [], true, start, end);
-      }
-    } else if (lowerCasedTagName === 'p') {
-      if (options.start) {
-        options.start(tagName, [], false, start, end);
+  function processIf (el) {
+    var exp = getAndRemoveAttr(el, 'v-if');
+    if (exp) {
+      el.if = exp;
+      addIfCondition(el, {
+        exp: exp,
+        block: el
+      });
+    } else {
+      if (getAndRemoveAttr(el, 'v-else') != null) {
+        el.else = true;
       }
-      if (options.end) {
-        options.end(tagName, start, end);
+      var elseif = getAndRemoveAttr(el, 'v-else-if');
+      if (elseif) {
+        el.elseif = elseif;
       }
     }
   }
-}
-
-/*  */
-
-var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
-var stripParensRE = /^\(|\)$/g;
-
-var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
-
-var decodeHTMLCached = cached(he.decode);
-
-// configurable state
-var warn$2;
-var delimiters;
-var transforms;
-var preTransforms;
-var postTransforms;
-var platformIsPreTag;
-var platformMustUseProp;
-var platformGetTagNamespace;
-
 
-
-function createASTElement (
-  tag,
-  attrs,
-  parent
-) {
-  return {
-    type: 1,
-    tag: tag,
-    attrsList: attrs,
-    attrsMap: makeAttrsMap(attrs),
-    parent: parent,
-    children: []
+  function processIfConditions (el, parent) {
+    var prev = findPrevElement(parent.children);
+    if (prev && prev.if) {
+      addIfCondition(prev, {
+        exp: el.elseif,
+        block: el
+      });
+    } else {
+      warn$2(
+        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+        "used on element <" + (el.tag) + "> without corresponding v-if.",
+        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+      );
+    }
   }
-}
-
-/**
- * Convert HTML string to AST.
- */
-function parse (
-  template,
-  options
-) {
-  warn$2 = options.warn || baseWarn;
 
-  platformIsPreTag = options.isPreTag || no;
-  platformMustUseProp = options.mustUseProp || no;
-  platformGetTagNamespace = options.getTagNamespace || no;
-
-  transforms = pluckModuleFunction(options.modules, 'transformNode');
-  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-  delimiters = options.delimiters;
-
-  var stack = [];
-  var preserveWhitespace = options.preserveWhitespace !== false;
-  var root;
-  var currentParent;
-  var inVPre = false;
-  var inPre = false;
-  var warned = false;
-
-  function warnOnce (msg) {
-    if (!warned) {
-      warned = true;
-      warn$2(msg);
+  function findPrevElement (children) {
+    var i = children.length;
+    while (i--) {
+      if (children[i].type === 1) {
+        return children[i]
+      } else {
+        if (children[i].text !== ' ') {
+          warn$2(
+            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+            "will be ignored.",
+            children[i]
+          );
+        }
+        children.pop();
+      }
     }
   }
 
-  function closeElement (element) {
-    // check pre state
-    if (element.pre) {
-      inVPre = false;
-    }
-    if (platformIsPreTag(element.tag)) {
-      inPre = false;
-    }
-    // apply post-transforms
-    for (var i = 0; i < postTransforms.length; i++) {
-      postTransforms[i](element, options);
+  function addIfCondition (el, condition) {
+    if (!el.ifConditions) {
+      el.ifConditions = [];
     }
+    el.ifConditions.push(condition);
   }
 
-  parseHTML(template, {
-    warn: warn$2,
-    expectHTML: options.expectHTML,
-    isUnaryTag: options.isUnaryTag,
-    canBeLeftOpenTag: options.canBeLeftOpenTag,
-    shouldDecodeNewlines: options.shouldDecodeNewlines,
-    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
-    shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
-      // check namespace.
-      // inherit parent ns if there is one
-      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+  function processOnce (el) {
+    var once$$1 = getAndRemoveAttr(el, 'v-once');
+    if (once$$1 != null) {
+      el.once = true;
+    }
+  }
 
-      // handle IE svg bug
+  // handle content being passed to a component as slot,
+  // e.g. <template slot="xxx">, <div slot-scope="xxx">
+  function processSlotContent (el) {
+    var slotScope;
+    if (el.tag === 'template') {
+      slotScope = getAndRemoveAttr(el, 'scope');
       /* istanbul ignore if */
-      if (isIE && ns === 'svg') {
-        attrs = guardIESVGBug(attrs);
-      }
-
-      var element = createASTElement(tag, attrs, currentParent);
-      if (ns) {
-        element.ns = ns;
+      if (slotScope) {
+        warn$2(
+          "the \"scope\" attribute for scoped slots have been deprecated and " +
+          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+          "can also be used on plain elements in addition to <template> to " +
+          "denote scoped slots.",
+          el.rawAttrsMap['scope'],
+          true
+        );
       }
-
-      if (isForbiddenTag(element) && !isServerRendering()) {
-        element.forbidden = true;
-        "development" !== 'production' && warn$2(
-          'Templates should only be responsible for mapping the state to the ' +
-          'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
+      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (el.attrsMap['v-for']) {
+        warn$2(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          el.rawAttrsMap['slot-scope'],
+          true
         );
       }
+      el.slotScope = slotScope;
+    }
 
-      // apply pre-transforms
-      for (var i = 0; i < preTransforms.length; i++) {
-        element = preTransforms[i](element, options) || element;
+    // slot="xxx"
+    var slotTarget = getBindingAttr(el, 'slot');
+    if (slotTarget) {
+      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+      // preserve slot as an attribute for native shadow DOM compat
+      // only for non-scoped slots.
+      if (el.tag !== 'template' && !el.slotScope) {
+        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
       }
+    }
 
-      if (!inVPre) {
-        processPre(element);
-        if (element.pre) {
-          inVPre = true;
+    // 2.6 v-slot syntax
+    {
+      if (el.tag === 'template') {
+        // v-slot on <template>
+        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding) {
+          {
+            if (el.slotTarget || el.slotScope) {
+              warn$2(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.parent && !maybeComponent(el.parent)) {
+              warn$2(
+                "<template v-slot> can only appear at the root level inside " +
+                "the receiving component",
+                el
+              );
+            }
+          }
+          var ref = getSlotName(slotBinding);
+          var name = ref.name;
+          var dynamic = ref.dynamic;
+          el.slotTarget = name;
+          el.slotTargetDynamic = dynamic;
+          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+        }
+      } else {
+        // v-slot on component, denotes default slot
+        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding$1) {
+          {
+            if (!maybeComponent(el)) {
+              warn$2(
+                "v-slot can only be used on components or <template>.",
+                slotBinding$1
+              );
+            }
+            if (el.slotScope || el.slotTarget) {
+              warn$2(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.scopedSlots) {
+              warn$2(
+                "To avoid scope ambiguity, the default slot should also use " +
+                "<template> syntax when there are other named slots.",
+                slotBinding$1
+              );
+            }
+          }
+          // add the component's children to its default slot
+          var slots = el.scopedSlots || (el.scopedSlots = {});
+          var ref$1 = getSlotName(slotBinding$1);
+          var name$1 = ref$1.name;
+          var dynamic$1 = ref$1.dynamic;
+          var slotContainer = slots[name$1] = createASTElement('template', [], el);
+          slotContainer.slotTarget = name$1;
+          slotContainer.slotTargetDynamic = dynamic$1;
+          slotContainer.children = el.children.filter(function (c) {
+            if (!c.slotScope) {
+              c.parent = slotContainer;
+              return true
+            }
+          });
+          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+          // remove children as they are returned from scopedSlots now
+          el.children = [];
+          // mark el non-plain so data gets generated
+          el.plain = false;
         }
       }
-      if (platformIsPreTag(element.tag)) {
-        inPre = true;
+    }
+  }
+
+  function getSlotName (binding) {
+    var name = binding.name.replace(slotRE, '');
+    if (!name) {
+      if (binding.name[0] !== '#') {
+        name = 'default';
+      } else {
+        warn$2(
+          "v-slot shorthand syntax requires a slot name.",
+          binding
+        );
       }
-      if (inVPre) {
-        processRawAttrs(element);
-      } else if (!element.processed) {
-        // structural directives
-        processFor(element);
-        processIf(element);
-        processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
+    }
+    return dynamicArgRE.test(name)
+      // dynamic [name]
+      ? { name: name.slice(1, -1), dynamic: true }
+      // static name
+      : { name: ("\"" + name + "\""), dynamic: false }
+  }
+
+  // handle <slot/> outlets
+  function processSlotOutlet (el) {
+    if (el.tag === 'slot') {
+      el.slotName = getBindingAttr(el, 'name');
+      if (el.key) {
+        warn$2(
+          "`key` does not work on <slot> because slots are abstract outlets " +
+          "and can possibly expand into multiple elements. " +
+          "Use the key on a wrapping element instead.",
+          getRawBindingAttr(el, 'key')
+        );
       }
+    }
+  }
 
-      function checkRootConstraints (el) {
-        {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
+  function processComponent (el) {
+    var binding;
+    if ((binding = getBindingAttr(el, 'is'))) {
+      el.component = binding;
+    }
+    if (getAndRemoveAttr(el, 'inline-template') != null) {
+      el.inlineTemplate = true;
+    }
+  }
+
+  function processAttrs (el) {
+    var list = el.attrsList;
+    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+    for (i = 0, l = list.length; i < l; i++) {
+      name = rawName = list[i].name;
+      value = list[i].value;
+      if (dirRE.test(name)) {
+        // mark element as dynamic
+        el.hasBindings = true;
+        // modifiers
+        modifiers = parseModifiers(name.replace(dirRE, ''));
+        // support .foo shorthand syntax for the .prop modifier
+        if (modifiers) {
+          name = name.replace(modifierRE, '');
+        }
+        if (bindRE.test(name)) { // v-bind
+          name = name.replace(bindRE, '');
+          value = parseFilters(value);
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
           }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
+          if (
+            value.trim().length === 0
+          ) {
+            warn$2(
+              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
             );
           }
+          if (modifiers) {
+            if (modifiers.prop && !isDynamic) {
+              name = camelize(name);
+              if (name === 'innerHtml') { name = 'innerHTML'; }
+            }
+            if (modifiers.camel && !isDynamic) {
+              name = camelize(name);
+            }
+            if (modifiers.sync) {
+              syncGen = genAssignmentCode(value, "$event");
+              if (!isDynamic) {
+                addHandler(
+                  el,
+                  ("update:" + (camelize(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i]
+                );
+                if (hyphenate(name) !== camelize(name)) {
+                  addHandler(
+                    el,
+                    ("update:" + (hyphenate(name))),
+                    syncGen,
+                    null,
+                    false,
+                    warn$2,
+                    list[i]
+                  );
+                }
+              } else {
+                // handler w/ dynamic event name
+                addHandler(
+                  el,
+                  ("\"update:\"+(" + name + ")"),
+                  syncGen,
+                  null,
+                  false,
+                  warn$2,
+                  list[i],
+                  true // dynamic
+                );
+              }
+            }
+          }
+          if ((modifiers && modifiers.prop) || (
+            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+          )) {
+            addProp(el, name, value, list[i], isDynamic);
+          } else {
+            addAttr(el, name, value, list[i], isDynamic);
+          }
+        } else if (onRE.test(name)) { // v-on
+          name = name.replace(onRE, '');
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
+        } else { // normal directives
+          name = name.replace(dirRE, '');
+          // parse arg
+          var argMatch = name.match(argRE);
+          var arg = argMatch && argMatch[1];
+          isDynamic = false;
+          if (arg) {
+            name = name.slice(0, -(arg.length + 1));
+            if (dynamicArgRE.test(arg)) {
+              arg = arg.slice(1, -1);
+              isDynamic = true;
+            }
+          }
+          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+          if (name === 'model') {
+            checkForAliasModel(el, value);
+          }
         }
-      }
-
-      // tree management
-      if (!root) {
-        root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
-        }
-      }
-      if (!unary) {
-        currentParent = element;
-        stack.push(element);
       } else {
-        closeElement(element);
-      }
-    },
-
-    end: function end () {
-      // remove trailing whitespace
-      var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
-      // pop stack
-      stack.length -= 1;
-      currentParent = stack[stack.length - 1];
-      closeElement(element);
-    },
-
-    chars: function chars (text) {
-      if (!currentParent) {
+        // literal attribute
         {
-          if (text === template) {
-            warnOnce(
-              'Component template requires a root element, rather than just text.'
-            );
-          } else if ((text = text.trim())) {
-            warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+          var res = parseText(value, delimiters);
+          if (res) {
+            warn$2(
+              name + "=\"" + value + "\": " +
+              'Interpolation inside attributes has been removed. ' +
+              'Use v-bind or the colon shorthand instead. For example, ' +
+              'instead of <div id="{{ val }}">, use <div :id="val">.',
+              list[i]
             );
           }
         }
-        return
+        addAttr(el, name, JSON.stringify(value), list[i]);
+        // #6887 firefox doesn't update muted state if set via attribute
+        // even immediately after element creation
+        if (!el.component &&
+            name === 'muted' &&
+            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+          addProp(el, name, 'true', list[i]);
+        }
       }
-      // IE textarea placeholder bug
-      /* istanbul ignore if */
-      if (isIE &&
-        currentParent.tag === 'textarea' &&
-        currentParent.attrsMap.placeholder === text
+    }
+  }
+
+  function checkInFor (el) {
+    var parent = el;
+    while (parent) {
+      if (parent.for !== undefined) {
+        return true
+      }
+      parent = parent.parent;
+    }
+    return false
+  }
+
+  function parseModifiers (name) {
+    var match = name.match(modifierRE);
+    if (match) {
+      var ret = {};
+      match.forEach(function (m) { ret[m.slice(1)] = true; });
+      return ret
+    }
+  }
+
+  function makeAttrsMap (attrs) {
+    var map = {};
+    for (var i = 0, l = attrs.length; i < l; i++) {
+      if (
+        map[attrs[i].name] && !isIE && !isEdge
       ) {
-        return
+        warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
       }
-      var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
-      if (text) {
-        var res;
-        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
-            type: 2,
-            expression: res.expression,
-            tokens: res.tokens,
-            text: text
-          });
-        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
-            type: 3,
-            text: text
-          });
-        }
+      map[attrs[i].name] = attrs[i].value;
+    }
+    return map
+  }
+
+  // for script (e.g. type="x/template") or style, do not decode content
+  function isTextTag (el) {
+    return el.tag === 'script' || el.tag === 'style'
+  }
+
+  function isForbiddenTag (el) {
+    return (
+      el.tag === 'style' ||
+      (el.tag === 'script' && (
+        !el.attrsMap.type ||
+        el.attrsMap.type === 'text/javascript'
+      ))
+    )
+  }
+
+  var ieNSBug = /^xmlns:NS\d+/;
+  var ieNSPrefix = /^NS\d+:/;
+
+  /* istanbul ignore next */
+  function guardIESVGBug (attrs) {
+    var res = [];
+    for (var i = 0; i < attrs.length; i++) {
+      var attr = attrs[i];
+      if (!ieNSBug.test(attr.name)) {
+        attr.name = attr.name.replace(ieNSPrefix, '');
+        res.push(attr);
       }
-    },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
     }
-  });
-  return root
-}
-
-function processPre (el) {
-  if (getAndRemoveAttr(el, 'v-pre') != null) {
-    el.pre = true;
-  }
-}
-
-function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
-      };
+    return res
+  }
+
+  function checkForAliasModel (el, value) {
+    var _el = el;
+    while (_el) {
+      if (_el.for && _el.alias === value) {
+        warn$2(
+          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+          "You are binding v-model directly to a v-for iteration alias. " +
+          "This will not be able to modify the v-for source array because " +
+          "writing to the alias is like modifying a function local variable. " +
+          "Consider using an array of objects and use v-model on an object property instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+      _el = _el.parent;
     }
-  } else if (!el.pre) {
-    // non root node in pre blocks with no attributes
-    el.plain = true;
   }
-}
 
-function processElement (element, options) {
-  processKey(element);
+  /*  */
+
+  function preTransformNode (el, options) {
+    if (el.tag === 'input') {
+      var map = el.attrsMap;
+      if (!map['v-model']) {
+        return
+      }
 
-  // determine whether this is a plain element after
-  // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+      var typeBinding;
+      if (map[':type'] || map['v-bind:type']) {
+        typeBinding = getBindingAttr(el, 'type');
+      }
+      if (!map.type && !typeBinding && map['v-bind']) {
+        typeBinding = "(" + (map['v-bind']) + ").type";
+      }
+
+      if (typeBinding) {
+        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+        // 1. checkbox
+        var branch0 = cloneASTElement(el);
+        // process for on the main node
+        processFor(branch0);
+        addRawAttr(branch0, 'type', 'checkbox');
+        processElement(branch0, options);
+        branch0.processed = true; // prevent it from double-processed
+        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+        addIfCondition(branch0, {
+          exp: branch0.if,
+          block: branch0
+        });
+        // 2. add radio else-if condition
+        var branch1 = cloneASTElement(el);
+        getAndRemoveAttr(branch1, 'v-for', true);
+        addRawAttr(branch1, 'type', 'radio');
+        processElement(branch1, options);
+        addIfCondition(branch0, {
+          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+          block: branch1
+        });
+        // 3. other
+        var branch2 = cloneASTElement(el);
+        getAndRemoveAttr(branch2, 'v-for', true);
+        addRawAttr(branch2, ':type', typeBinding);
+        processElement(branch2, options);
+        addIfCondition(branch0, {
+          exp: ifCondition,
+          block: branch2
+        });
 
-  processRef(element);
-  processSlot(element);
-  processComponent(element);
-  for (var i = 0; i < transforms.length; i++) {
-    element = transforms[i](element, options) || element;
-  }
-  processAttrs(element);
-}
+        if (hasElse) {
+          branch0.else = true;
+        } else if (elseIfCondition) {
+          branch0.elseif = elseIfCondition;
+        }
 
-function processKey (el) {
-  var exp = getBindingAttr(el, 'key');
-  if (exp) {
-    if ("development" !== 'production' && el.tag === 'template') {
-      warn$2("<template> cannot be keyed. Place the key on real elements instead.");
+        return branch0
+      }
     }
-    el.key = exp;
   }
-}
 
-function processRef (el) {
-  var ref = getBindingAttr(el, 'ref');
-  if (ref) {
-    el.ref = ref;
-    el.refInFor = checkInFor(el);
+  function cloneASTElement (el) {
+    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
   }
-}
 
-function processFor (el) {
-  var exp;
-  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    var res = parseFor(exp);
-    if (res) {
-      extend(el, res);
-    } else {
-      warn$2(
-        ("Invalid v-for expression: " + exp)
-      );
+  var model$1 = {
+    preTransformNode: preTransformNode
+  };
+
+  var modules$1 = [
+    klass$1,
+    style$1,
+    model$1
+  ];
+
+  /*  */
+
+  function text (el, dir) {
+    if (dir.value) {
+      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
     }
   }
-}
 
-function parseFor (exp) {
-  var inMatch = exp.match(forAliasRE);
-  if (!inMatch) { return }
-  var res = {};
-  res.for = inMatch[2].trim();
-  var alias = inMatch[1].trim().replace(stripParensRE, '');
-  var iteratorMatch = alias.match(forIteratorRE);
-  if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
-    res.iterator1 = iteratorMatch[1].trim();
-    if (iteratorMatch[2]) {
-      res.iterator2 = iteratorMatch[2].trim();
-    }
-  } else {
-    res.alias = alias;
-  }
-  return res
-}
-
-function processIf (el) {
-  var exp = getAndRemoveAttr(el, 'v-if');
-  if (exp) {
-    el.if = exp;
-    addIfCondition(el, {
-      exp: exp,
-      block: el
-    });
-  } else {
-    if (getAndRemoveAttr(el, 'v-else') != null) {
-      el.else = true;
-    }
-    var elseif = getAndRemoveAttr(el, 'v-else-if');
-    if (elseif) {
-      el.elseif = elseif;
+  /*  */
+
+  function html (el, dir) {
+    if (dir.value) {
+      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
     }
   }
-}
 
-function processIfConditions (el, parent) {
-  var prev = findPrevElement(parent.children);
-  if (prev && prev.if) {
-    addIfCondition(prev, {
-      exp: el.elseif,
-      block: el
-    });
-  } else {
-    warn$2(
-      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
-    );
+  var directives$1 = {
+    model: model,
+    text: text,
+    html: html
+  };
+
+  /*  */
+
+  var baseOptions = {
+    expectHTML: true,
+    modules: modules$1,
+    directives: directives$1,
+    isPreTag: isPreTag,
+    isUnaryTag: isUnaryTag,
+    mustUseProp: mustUseProp,
+    canBeLeftOpenTag: canBeLeftOpenTag,
+    isReservedTag: isReservedTag,
+    getTagNamespace: getTagNamespace,
+    staticKeys: genStaticKeys(modules$1)
+  };
+
+  /*  */
+
+  var isStaticKey;
+  var isPlatformReservedTag;
+
+  var genStaticKeysCached = cached(genStaticKeys$1);
+
+  /**
+   * Goal of the optimizer: walk the generated template AST tree
+   * and detect sub-trees that are purely static, i.e. parts of
+   * the DOM that never needs to change.
+   *
+   * Once we detect these sub-trees, we can:
+   *
+   * 1. Hoist them into constants, so that we no longer need to
+   *    create fresh nodes for them on each re-render;
+   * 2. Completely skip them in the patching process.
+   */
+  function optimize (root, options) {
+    if (!root) { return }
+    isStaticKey = genStaticKeysCached(options.staticKeys || '');
+    isPlatformReservedTag = options.isReservedTag || no;
+    // first pass: mark all non-static nodes.
+    markStatic$1(root);
+    // second pass: mark static roots.
+    markStaticRoots(root, false);
+  }
+
+  function genStaticKeys$1 (keys) {
+    return makeMap(
+      'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+      (keys ? ',' + keys : '')
+    )
   }
-}
 
-function findPrevElement (children) {
-  var i = children.length;
-  while (i--) {
-    if (children[i].type === 1) {
-      return children[i]
-    } else {
-      if ("development" !== 'production' && children[i].text !== ' ') {
-        warn$2(
-          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
-        );
+  function markStatic$1 (node) {
+    node.static = isStatic(node);
+    if (node.type === 1) {
+      // do not make component slot content static. this avoids
+      // 1. components not able to mutate slot nodes
+      // 2. static slot content fails for hot-reloading
+      if (
+        !isPlatformReservedTag(node.tag) &&
+        node.tag !== 'slot' &&
+        node.attrsMap['inline-template'] == null
+      ) {
+        return
+      }
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        var child = node.children[i];
+        markStatic$1(child);
+        if (!child.static) {
+          node.static = false;
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          var block = node.ifConditions[i$1].block;
+          markStatic$1(block);
+          if (!block.static) {
+            node.static = false;
+          }
+        }
       }
-      children.pop();
     }
   }
-}
 
-function addIfCondition (el, condition) {
-  if (!el.ifConditions) {
-    el.ifConditions = [];
+  function markStaticRoots (node, isInFor) {
+    if (node.type === 1) {
+      if (node.static || node.once) {
+        node.staticInFor = isInFor;
+      }
+      // For a node to qualify as a static root, it should have children that
+      // are not just static text. Otherwise the cost of hoisting out will
+      // outweigh the benefits and it's better off to just always render it fresh.
+      if (node.static && node.children.length && !(
+        node.children.length === 1 &&
+        node.children[0].type === 3
+      )) {
+        node.staticRoot = true;
+        return
+      } else {
+        node.staticRoot = false;
+      }
+      if (node.children) {
+        for (var i = 0, l = node.children.length; i < l; i++) {
+          markStaticRoots(node.children[i], isInFor || !!node.for);
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          markStaticRoots(node.ifConditions[i$1].block, isInFor);
+        }
+      }
+    }
   }
-  el.ifConditions.push(condition);
-}
 
-function processOnce (el) {
-  var once$$1 = getAndRemoveAttr(el, 'v-once');
-  if (once$$1 != null) {
-    el.once = true;
+  function isStatic (node) {
+    if (node.type === 2) { // expression
+      return false
+    }
+    if (node.type === 3) { // text
+      return true
+    }
+    return !!(node.pre || (
+      !node.hasBindings && // no dynamic bindings
+      !node.if && !node.for && // not v-if or v-for or v-else
+      !isBuiltInTag(node.tag) && // not a built-in
+      isPlatformReservedTag(node.tag) && // not a component
+      !isDirectChildOfTemplateFor(node) &&
+      Object.keys(node).every(isStaticKey)
+    ))
   }
-}
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if ("development" !== 'production' && el.key) {
-      warn$2(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
-      );
-    }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if ("development" !== 'production' && slotScope) {
-        warn$2(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
+  function isDirectChildOfTemplateFor (node) {
+    while (node.parent) {
+      node = node.parent;
+      if (node.tag !== 'template') {
+        return false
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if ("development" !== 'production' && el.attrsMap['v-for']) {
-        warn$2(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
+      if (node.for) {
+        return true
       }
-      el.slotScope = slotScope;
     }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
+    return false
+  }
+
+  /*  */
+
+  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+  var fnInvokeRE = /\([^)]*?\);*$/;
+  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+  // KeyboardEvent.keyCode aliases
+  var keyCodes = {
+    esc: 27,
+    tab: 9,
+    enter: 13,
+    space: 32,
+    up: 38,
+    left: 37,
+    right: 39,
+    down: 40,
+    'delete': [8, 46]
+  };
+
+  // KeyboardEvent.key aliases
+  var keyNames = {
+    // #7880: IE11 and Edge use `Esc` for Escape key name.
+    esc: ['Esc', 'Escape'],
+    tab: 'Tab',
+    enter: 'Enter',
+    // #9112: IE11 uses `Spacebar` for Space key name.
+    space: [' ', 'Spacebar'],
+    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+    up: ['Up', 'ArrowUp'],
+    left: ['Left', 'ArrowLeft'],
+    right: ['Right', 'ArrowRight'],
+    down: ['Down', 'ArrowDown'],
+    // #9112: IE11 uses `Del` for Delete key name.
+    'delete': ['Backspace', 'Delete', 'Del']
+  };
+
+  // #4868: modifiers that prevent the execution of the listener
+  // need to explicitly return null so that we can determine whether to remove
+  // the listener for .once
+  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+  var modifierCode = {
+    stop: '$event.stopPropagation();',
+    prevent: '$event.preventDefault();',
+    self: genGuard("$event.target !== $event.currentTarget"),
+    ctrl: genGuard("!$event.ctrlKey"),
+    shift: genGuard("!$event.shiftKey"),
+    alt: genGuard("!$event.altKey"),
+    meta: genGuard("!$event.metaKey"),
+    left: genGuard("'button' in $event && $event.button !== 0"),
+    middle: genGuard("'button' in $event && $event.button !== 1"),
+    right: genGuard("'button' in $event && $event.button !== 2")
+  };
+
+  function genHandlers (
+    events,
+    isNative
+  ) {
+    var prefix = isNative ? 'nativeOn:' : 'on:';
+    var staticHandlers = "";
+    var dynamicHandlers = "";
+    for (var name in events) {
+      var handlerCode = genHandler(events[name]);
+      if (events[name] && events[name].dynamic) {
+        dynamicHandlers += name + "," + handlerCode + ",";
+      } else {
+        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
       }
     }
+    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+    if (dynamicHandlers) {
+      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+    } else {
+      return prefix + staticHandlers
+    }
   }
-}
 
-function processComponent (el) {
-  var binding;
-  if ((binding = getBindingAttr(el, 'is'))) {
-    el.component = binding;
-  }
-  if (getAndRemoveAttr(el, 'inline-template') != null) {
-    el.inlineTemplate = true;
-  }
-}
+  function genHandler (handler) {
+    if (!handler) {
+      return 'function(){}'
+    }
+
+    if (Array.isArray(handler)) {
+      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+    }
 
-function processAttrs (el) {
-  var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
-  for (i = 0, l = list.length; i < l; i++) {
-    name = rawName = list[i].name;
-    value = list[i].value;
-    if (dirRE.test(name)) {
-      // mark element as dynamic
-      el.hasBindings = true;
-      // modifiers
-      modifiers = parseModifiers(name);
-      if (modifiers) {
-        name = name.replace(modifierRE, '');
+    var isMethodPath = simplePathRE.test(handler.value);
+    var isFunctionExpression = fnExpRE.test(handler.value);
+    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+    if (!handler.modifiers) {
+      if (isMethodPath || isFunctionExpression) {
+        return handler.value
       }
-      if (bindRE.test(name)) { // v-bind
-        name = name.replace(bindRE, '');
-        value = parseFilters(value);
-        isProp = false;
-        if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
-            name = camelize(name);
-            if (name === 'innerHtml') { name = 'innerHTML'; }
-          }
-          if (modifiers.camel) {
-            name = camelize(name);
-          }
-          if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
+      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+    } else {
+      var code = '';
+      var genModifierCode = '';
+      var keys = [];
+      for (var key in handler.modifiers) {
+        if (modifierCode[key]) {
+          genModifierCode += modifierCode[key];
+          // left/right
+          if (keyCodes[key]) {
+            keys.push(key);
           }
-        }
-        if (isProp || (
-          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
-        )) {
-          addProp(el, name, value);
+        } else if (key === 'exact') {
+          var modifiers = (handler.modifiers);
+          genModifierCode += genGuard(
+            ['ctrl', 'shift', 'alt', 'meta']
+              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+              .join('||')
+          );
         } else {
-          addAttr(el, name, value);
-        }
-      } else if (onRE.test(name)) { // v-on
-        name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$2);
-      } else { // normal directives
-        name = name.replace(dirRE, '');
-        // parse arg
-        var argMatch = name.match(argRE);
-        var arg = argMatch && argMatch[1];
-        if (arg) {
-          name = name.slice(0, -(arg.length + 1));
-        }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if ("development" !== 'production' && name === 'model') {
-          checkForAliasModel(el, value);
+          keys.push(key);
         }
       }
-    } else {
-      // literal attribute
-      {
-        var res = parseText(value, delimiters);
-        if (res) {
-          warn$2(
-            name + "=\"" + value + "\": " +
-            'Interpolation inside attributes has been removed. ' +
-            'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
-          );
-        }
+      if (keys.length) {
+        code += genKeyFilter(keys);
       }
-      addAttr(el, name, JSON.stringify(value));
-      // #6887 firefox doesn't update muted state if set via attribute
-      // even immediately after element creation
-      if (!el.component &&
-          name === 'muted' &&
-          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+      // Make sure modifiers like prevent and stop get executed after key filtering
+      if (genModifierCode) {
+        code += genModifierCode;
       }
+      var handlerCode = isMethodPath
+        ? ("return " + (handler.value) + ".apply(null, arguments)")
+        : isFunctionExpression
+          ? ("return (" + (handler.value) + ").apply(null, arguments)")
+          : isFunctionInvocation
+            ? ("return " + (handler.value))
+            : handler.value;
+      return ("function($event){" + code + handlerCode + "}")
     }
   }
-}
 
-function checkInFor (el) {
-  var parent = el;
-  while (parent) {
-    if (parent.for !== undefined) {
-      return true
-    }
-    parent = parent.parent;
+  function genKeyFilter (keys) {
+    return (
+      // make sure the key filters only apply to KeyboardEvents
+      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+      // key events that do not have keyCode property...
+      "if(!$event.type.indexOf('key')&&" +
+      (keys.map(genFilterCode).join('&&')) + ")return null;"
+    )
   }
-  return false
-}
 
-function parseModifiers (name) {
-  var match = name.match(modifierRE);
-  if (match) {
-    var ret = {};
-    match.forEach(function (m) { ret[m.slice(1)] = true; });
-    return ret
+  function genFilterCode (key) {
+    var keyVal = parseInt(key, 10);
+    if (keyVal) {
+      return ("$event.keyCode!==" + keyVal)
+    }
+    var keyCode = keyCodes[key];
+    var keyName = keyNames[key];
+    return (
+      "_k($event.keyCode," +
+      (JSON.stringify(key)) + "," +
+      (JSON.stringify(keyCode)) + "," +
+      "$event.key," +
+      "" + (JSON.stringify(keyName)) +
+      ")"
+    )
   }
-}
 
-function makeAttrsMap (attrs) {
-  var map = {};
-  for (var i = 0, l = attrs.length; i < l; i++) {
-    if (
-      "development" !== 'production' &&
-      map[attrs[i].name] && !isIE && !isEdge
-    ) {
-      warn$2('duplicate attribute: ' + attrs[i].name);
+  /*  */
+
+  function on (el, dir) {
+    if (dir.modifiers) {
+      warn("v-on without argument does not support modifiers.");
     }
-    map[attrs[i].name] = attrs[i].value;
+    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
   }
-  return map
-}
 
-// for script (e.g. type="x/template") or style, do not decode content
-function isTextTag (el) {
-  return el.tag === 'script' || el.tag === 'style'
-}
+  /*  */
 
-function isForbiddenTag (el) {
-  return (
-    el.tag === 'style' ||
-    (el.tag === 'script' && (
-      !el.attrsMap.type ||
-      el.attrsMap.type === 'text/javascript'
-    ))
-  )
-}
+  function bind$1 (el, dir) {
+    el.wrapData = function (code) {
+      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+    };
+  }
 
-var ieNSBug = /^xmlns:NS\d+/;
-var ieNSPrefix = /^NS\d+:/;
+  /*  */
 
-/* istanbul ignore next */
-function guardIESVGBug (attrs) {
-  var res = [];
-  for (var i = 0; i < attrs.length; i++) {
-    var attr = attrs[i];
-    if (!ieNSBug.test(attr.name)) {
-      attr.name = attr.name.replace(ieNSPrefix, '');
-      res.push(attr);
-    }
-  }
-  return res
-}
+  var baseDirectives = {
+    on: on,
+    bind: bind$1,
+    cloak: noop
+  };
 
-function checkForAliasModel (el, value) {
-  var _el = el;
-  while (_el) {
-    if (_el.for && _el.alias === value) {
-      warn$2(
-        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-        "You are binding v-model directly to a v-for iteration alias. " +
-        "This will not be able to modify the v-for source array because " +
-        "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
-      );
-    }
-    _el = _el.parent;
-  }
-}
+  /*  */
 
-/*  */
 
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
 
-function preTransformNode (el, options) {
-  if (el.tag === 'input') {
-    var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
-      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
-      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
-      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
-      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
-      // 1. checkbox
-      var branch0 = cloneASTElement(el);
-      // process for on the main node
-      processFor(branch0);
-      addRawAttr(branch0, 'type', 'checkbox');
-      processElement(branch0, options);
-      branch0.processed = true; // prevent it from double-processed
-      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
-      addIfCondition(branch0, {
-        exp: branch0.if,
-        block: branch0
-      });
-      // 2. add radio else-if condition
-      var branch1 = cloneASTElement(el);
-      getAndRemoveAttr(branch1, 'v-for', true);
-      addRawAttr(branch1, 'type', 'radio');
-      processElement(branch1, options);
-      addIfCondition(branch0, {
-        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
-        block: branch1
-      });
-      // 3. other
-      var branch2 = cloneASTElement(el);
-      getAndRemoveAttr(branch2, 'v-for', true);
-      addRawAttr(branch2, ':type', typeBinding);
-      processElement(branch2, options);
-      addIfCondition(branch0, {
-        exp: ifCondition,
-        block: branch2
-      });
 
-      if (hasElse) {
-        branch0.else = true;
-      } else if (elseIfCondition) {
-        branch0.elseif = elseIfCondition;
-      }
 
-      return branch0
+  var CodegenState = function CodegenState (options) {
+    this.options = options;
+    this.warn = options.warn || baseWarn;
+    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+    this.directives = extend(extend({}, baseDirectives), options.directives);
+    var isReservedTag = options.isReservedTag || no;
+    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+    this.onceId = 0;
+    this.staticRenderFns = [];
+    this.pre = false;
+  };
+
+
+
+  function generate (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    // fix #11483, Root level <script> tags should not be rendered.
+    var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
     }
   }
-}
 
-function cloneASTElement (el) {
-  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
-}
-
-var model$2 = {
-  preTransformNode: preTransformNode
-};
+  function genElement (el, state) {
+    if (el.parent) {
+      el.pre = el.pre || el.parent.pre;
+    }
 
-var modules$1 = [
-  klass$1,
-  style$1,
-  model$2
-];
+    if (el.staticRoot && !el.staticProcessed) {
+      return genStatic(el, state)
+    } else if (el.once && !el.onceProcessed) {
+      return genOnce(el, state)
+    } else if (el.for && !el.forProcessed) {
+      return genFor(el, state)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+      return genChildren(el, state) || 'void 0'
+    } else if (el.tag === 'slot') {
+      return genSlot(el, state)
+    } else {
+      // component or element
+      var code;
+      if (el.component) {
+        code = genComponent(el.component, el, state);
+      } else {
+        var data;
+        if (!el.plain || (el.pre && state.maybeComponent(el))) {
+          data = genData$2(el, state);
+        }
 
-/*  */
+        var children = el.inlineTemplate ? null : genChildren(el, state, true);
+        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      }
+      // module transforms
+      for (var i = 0; i < state.transforms.length; i++) {
+        code = state.transforms[i](el, code);
+      }
+      return code
+    }
+  }
 
-function text (el, dir) {
-  if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
+  // hoist static sub-trees out
+  function genStatic (el, state) {
+    el.staticProcessed = true;
+    // Some elements (templates) need to behave differently inside of a v-pre
+    // node.  All pre nodes are static roots, so we can use this as a location to
+    // wrap a state change and reset it upon exiting the pre node.
+    var originalPreState = state.pre;
+    if (el.pre) {
+      state.pre = el.pre;
+    }
+    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+    state.pre = originalPreState;
+    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
   }
-}
 
-/*  */
+  // v-once
+  function genOnce (el, state) {
+    el.onceProcessed = true;
+    if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.staticInFor) {
+      var key = '';
+      var parent = el.parent;
+      while (parent) {
+        if (parent.for) {
+          key = parent.key;
+          break
+        }
+        parent = parent.parent;
+      }
+      if (!key) {
+        state.warn(
+          "v-once can only be used inside v-for that is keyed. ",
+          el.rawAttrsMap['v-once']
+        );
+        return genElement(el, state)
+      }
+      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+    } else {
+      return genStatic(el, state)
+    }
+  }
 
-function html (el, dir) {
-  if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
+  function genIf (
+    el,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    el.ifProcessed = true; // avoid recursion
+    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
   }
-}
 
-var directives$1 = {
-  model: model,
-  text: text,
-  html: html
-};
+  function genIfConditions (
+    conditions,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    if (!conditions.length) {
+      return altEmpty || '_e()'
+    }
+
+    var condition = conditions.shift();
+    if (condition.exp) {
+      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+    } else {
+      return ("" + (genTernaryExp(condition.block)))
+    }
 
-/*  */
+    // v-if with v-once should generate code like (a)?_m(0):_m(1)
+    function genTernaryExp (el) {
+      return altGen
+        ? altGen(el, state)
+        : el.once
+          ? genOnce(el, state)
+          : genElement(el, state)
+    }
+  }
 
-var baseOptions = {
-  expectHTML: true,
-  modules: modules$1,
-  directives: directives$1,
-  isPreTag: isPreTag,
-  isUnaryTag: isUnaryTag,
-  mustUseProp: mustUseProp,
-  canBeLeftOpenTag: canBeLeftOpenTag,
-  isReservedTag: isReservedTag,
-  getTagNamespace: getTagNamespace,
-  staticKeys: genStaticKeys(modules$1)
-};
+  function genFor (
+    el,
+    state,
+    altGen,
+    altHelper
+  ) {
+    var exp = el.for;
+    var alias = el.alias;
+    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+    if (state.maybeComponent(el) &&
+      el.tag !== 'slot' &&
+      el.tag !== 'template' &&
+      !el.key
+    ) {
+      state.warn(
+        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+        "v-for should have explicit keys. " +
+        "See https://vuejs.org/guide/list.html#key for more info.",
+        el.rawAttrsMap['v-for'],
+        true /* tip */
+      );
+    }
 
-/*  */
+    el.forProcessed = true; // avoid recursion
+    return (altHelper || '_l') + "((" + exp + ")," +
+      "function(" + alias + iterator1 + iterator2 + "){" +
+        "return " + ((altGen || genElement)(el, state)) +
+      '})'
+  }
 
-var isStaticKey;
-var isPlatformReservedTag;
+  function genData$2 (el, state) {
+    var data = '{';
 
-var genStaticKeysCached = cached(genStaticKeys$1);
+    // directives first.
+    // directives may mutate the el's other properties before they are generated.
+    var dirs = genDirectives(el, state);
+    if (dirs) { data += dirs + ','; }
 
-/**
- * Goal of the optimizer: walk the generated template AST tree
- * and detect sub-trees that are purely static, i.e. parts of
- * the DOM that never needs to change.
- *
- * Once we detect these sub-trees, we can:
- *
- * 1. Hoist them into constants, so that we no longer need to
- *    create fresh nodes for them on each re-render;
- * 2. Completely skip them in the patching process.
- */
-function optimize (root, options) {
-  if (!root) { return }
-  isStaticKey = genStaticKeysCached(options.staticKeys || '');
-  isPlatformReservedTag = options.isReservedTag || no;
-  // first pass: mark all non-static nodes.
-  markStatic$1(root);
-  // second pass: mark static roots.
-  markStaticRoots(root, false);
-}
-
-function genStaticKeys$1 (keys) {
-  return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
-    (keys ? ',' + keys : '')
-  )
-}
-
-function markStatic$1 (node) {
-  node.static = isStatic(node);
-  if (node.type === 1) {
-    // do not make component slot content static. this avoids
-    // 1. components not able to mutate slot nodes
-    // 2. static slot content fails for hot-reloading
-    if (
-      !isPlatformReservedTag(node.tag) &&
-      node.tag !== 'slot' &&
-      node.attrsMap['inline-template'] == null
-    ) {
-      return
+    // key
+    if (el.key) {
+      data += "key:" + (el.key) + ",";
+    }
+    // ref
+    if (el.ref) {
+      data += "ref:" + (el.ref) + ",";
+    }
+    if (el.refInFor) {
+      data += "refInFor:true,";
+    }
+    // pre
+    if (el.pre) {
+      data += "pre:true,";
     }
-    for (var i = 0, l = node.children.length; i < l; i++) {
-      var child = node.children[i];
-      markStatic$1(child);
-      if (!child.static) {
-        node.static = false;
+    // record original tag name for components using "is" attribute
+    if (el.component) {
+      data += "tag:\"" + (el.tag) + "\",";
+    }
+    // module data generation functions
+    for (var i = 0; i < state.dataGenFns.length; i++) {
+      data += state.dataGenFns[i](el);
+    }
+    // attributes
+    if (el.attrs) {
+      data += "attrs:" + (genProps(el.attrs)) + ",";
+    }
+    // DOM props
+    if (el.props) {
+      data += "domProps:" + (genProps(el.props)) + ",";
+    }
+    // event handlers
+    if (el.events) {
+      data += (genHandlers(el.events, false)) + ",";
+    }
+    if (el.nativeEvents) {
+      data += (genHandlers(el.nativeEvents, true)) + ",";
+    }
+    // slot target
+    // only for non-scoped slots
+    if (el.slotTarget && !el.slotScope) {
+      data += "slot:" + (el.slotTarget) + ",";
+    }
+    // scoped slots
+    if (el.scopedSlots) {
+      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+    }
+    // component v-model
+    if (el.model) {
+      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+    }
+    // inline-template
+    if (el.inlineTemplate) {
+      var inlineTemplate = genInlineTemplate(el, state);
+      if (inlineTemplate) {
+        data += inlineTemplate + ",";
       }
     }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        var block = node.ifConditions[i$1].block;
-        markStatic$1(block);
-        if (!block.static) {
-          node.static = false;
+    data = data.replace(/,$/, '') + '}';
+    // v-bind dynamic argument wrap
+    // v-bind with dynamic arguments must be applied using the same v-bind object
+    // merge helper so that class/style/mustUseProp attrs are handled correctly.
+    if (el.dynamicAttrs) {
+      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+    }
+    // v-bind data wrap
+    if (el.wrapData) {
+      data = el.wrapData(data);
+    }
+    // v-on data wrap
+    if (el.wrapListeners) {
+      data = el.wrapListeners(data);
+    }
+    return data
+  }
+
+  function genDirectives (el, state) {
+    var dirs = el.directives;
+    if (!dirs) { return }
+    var res = 'directives:[';
+    var hasRuntime = false;
+    var i, l, dir, needRuntime;
+    for (i = 0, l = dirs.length; i < l; i++) {
+      dir = dirs[i];
+      needRuntime = true;
+      var gen = state.directives[dir.name];
+      if (gen) {
+        // compile-time directive that manipulates AST.
+        // returns true if it also needs a runtime counterpart.
+        needRuntime = !!gen(el, dir, state.warn);
+      }
+      if (needRuntime) {
+        hasRuntime = true;
+        res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      }
+    }
+    if (hasRuntime) {
+      return res.slice(0, -1) + ']'
+    }
+  }
+
+  function genInlineTemplate (el, state) {
+    var ast = el.children[0];
+    if (el.children.length !== 1 || ast.type !== 1) {
+      state.warn(
+        'Inline-template components must have exactly one child element.',
+        { start: el.start }
+      );
+    }
+    if (ast && ast.type === 1) {
+      var inlineRenderFns = generate(ast, state.options);
+      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+    }
+  }
+
+  function genScopedSlots (
+    el,
+    slots,
+    state
+  ) {
+    // by default scoped slots are considered "stable", this allows child
+    // components with only scoped slots to skip forced updates from parent.
+    // but in some cases we have to bail-out of this optimization
+    // for example if the slot contains dynamic names, has v-if or v-for on them...
+    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+      var slot = slots[key];
+      return (
+        slot.slotTargetDynamic ||
+        slot.if ||
+        slot.for ||
+        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+      )
+    });
+
+    // #9534: if a component with scoped slots is inside a conditional branch,
+    // it's possible for the same component to be reused but with different
+    // compiled slot content. To avoid that, we generate a unique key based on
+    // the generated code of all the slot contents.
+    var needsKey = !!el.if;
+
+    // OR when it is inside another scoped slot or v-for (the reactivity may be
+    // disconnected due to the intermediate scope variable)
+    // #9438, #9506
+    // TODO: this can be further optimized by properly analyzing in-scope bindings
+    // and skip force updating ones that do not actually use scope variables.
+    if (!needsForceUpdate) {
+      var parent = el.parent;
+      while (parent) {
+        if (
+          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+          parent.for
+        ) {
+          needsForceUpdate = true;
+          break
+        }
+        if (parent.if) {
+          needsKey = true;
         }
+        parent = parent.parent;
       }
     }
+
+    var generatedSlots = Object.keys(slots)
+      .map(function (key) { return genScopedSlot(slots[key], state); })
+      .join(',');
+
+    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
   }
-}
 
-function markStaticRoots (node, isInFor) {
-  if (node.type === 1) {
-    if (node.static || node.once) {
-      node.staticInFor = isInFor;
-    }
-    // For a node to qualify as a static root, it should have children that
-    // are not just static text. Otherwise the cost of hoisting out will
-    // outweigh the benefits and it's better off to just always render it fresh.
-    if (node.static && node.children.length && !(
-      node.children.length === 1 &&
-      node.children[0].type === 3
-    )) {
-      node.staticRoot = true;
-      return
-    } else {
-      node.staticRoot = false;
-    }
-    if (node.children) {
-      for (var i = 0, l = node.children.length; i < l; i++) {
-        markStaticRoots(node.children[i], isInFor || !!node.for);
-      }
-    }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        markStaticRoots(node.ifConditions[i$1].block, isInFor);
-      }
+  function hash(str) {
+    var hash = 5381;
+    var i = str.length;
+    while(i) {
+      hash = (hash * 33) ^ str.charCodeAt(--i);
     }
+    return hash >>> 0
   }
-}
 
-function isStatic (node) {
-  if (node.type === 2) { // expression
+  function containsSlotChild (el) {
+    if (el.type === 1) {
+      if (el.tag === 'slot') {
+        return true
+      }
+      return el.children.some(containsSlotChild)
+    }
     return false
   }
-  if (node.type === 3) { // text
-    return true
-  }
-  return !!(node.pre || (
-    !node.hasBindings && // no dynamic bindings
-    !node.if && !node.for && // not v-if or v-for or v-else
-    !isBuiltInTag(node.tag) && // not a built-in
-    isPlatformReservedTag(node.tag) && // not a component
-    !isDirectChildOfTemplateFor(node) &&
-    Object.keys(node).every(isStaticKey)
-  ))
-}
-
-function isDirectChildOfTemplateFor (node) {
-  while (node.parent) {
-    node = node.parent;
-    if (node.tag !== 'template') {
-      return false
-    }
-    if (node.for) {
-      return true
+
+  function genScopedSlot (
+    el,
+    state
+  ) {
+    var isLegacySyntax = el.attrsMap['slot-scope'];
+    if (el.if && !el.ifProcessed && !isLegacySyntax) {
+      return genIf(el, state, genScopedSlot, "null")
+    }
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genScopedSlot)
+    }
+    var slotScope = el.slotScope === emptySlotScopeToken
+      ? ""
+      : String(el.slotScope);
+    var fn = "function(" + slotScope + "){" +
+      "return " + (el.tag === 'template'
+        ? el.if && isLegacySyntax
+          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+          : genChildren(el, state) || 'undefined'
+        : genElement(el, state)) + "}";
+    // reverse proxy v-slot without scope on this.$slots
+    var reverseProxy = slotScope ? "" : ",proxy:true";
+    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+  }
+
+  function genChildren (
+    el,
+    state,
+    checkSkip,
+    altGenElement,
+    altGenNode
+  ) {
+    var children = el.children;
+    if (children.length) {
+      var el$1 = children[0];
+      // optimize single v-for
+      if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot'
+      ) {
+        var normalizationType = checkSkip
+          ? state.maybeComponent(el$1) ? ",1" : ",0"
+          : "";
+        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+      }
+      var normalizationType$1 = checkSkip
+        ? getNormalizationType(children, state.maybeComponent)
+        : 0;
+      var gen = altGenNode || genNode;
+      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
     }
   }
-  return false
-}
-
-/*  */
-
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
-
-// keyCode aliases
-var keyCodes = {
-  esc: 27,
-  tab: 9,
-  enter: 13,
-  space: 32,
-  up: 38,
-  left: 37,
-  right: 39,
-  down: 40,
-  'delete': [8, 46]
-};
-
-// #4868: modifiers that prevent the execution of the listener
-// need to explicitly return null so that we can determine whether to remove
-// the listener for .once
-var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
-
-var modifierCode = {
-  stop: '$event.stopPropagation();',
-  prevent: '$event.preventDefault();',
-  self: genGuard("$event.target !== $event.currentTarget"),
-  ctrl: genGuard("!$event.ctrlKey"),
-  shift: genGuard("!$event.shiftKey"),
-  alt: genGuard("!$event.altKey"),
-  meta: genGuard("!$event.metaKey"),
-  left: genGuard("'button' in $event && $event.button !== 0"),
-  middle: genGuard("'button' in $event && $event.button !== 1"),
-  right: genGuard("'button' in $event && $event.button !== 2")
-};
-
-function genHandlers (
-  events,
-  isNative,
-  warn
-) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
-  for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
-  }
-  return res.slice(0, -1) + '}'
-}
-
-function genHandler (
-  name,
-  handler
-) {
-  if (!handler) {
-    return 'function(){}'
-  }
-
-  if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
-  }
-
-  var isMethodPath = simplePathRE.test(handler.value);
-  var isFunctionExpression = fnExpRE.test(handler.value);
-
-  if (!handler.modifiers) {
-    if (isMethodPath || isFunctionExpression) {
-      return handler.value
-    }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
-  } else {
-    var code = '';
-    var genModifierCode = '';
-    var keys = [];
-    for (var key in handler.modifiers) {
-      if (modifierCode[key]) {
-        genModifierCode += modifierCode[key];
-        // left/right
-        if (keyCodes[key]) {
-          keys.push(key);
-        }
-      } else if (key === 'exact') {
-        var modifiers = (handler.modifiers);
-        genModifierCode += genGuard(
-          ['ctrl', 'shift', 'alt', 'meta']
-            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
-            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
-            .join('||')
-        );
-      } else {
-        keys.push(key);
+
+  // determine the normalization needed for the children array.
+  // 0: no normalization needed
+  // 1: simple normalization needed (possible 1-level deep nested array)
+  // 2: full normalization needed
+  function getNormalizationType (
+    children,
+    maybeComponent
+  ) {
+    var res = 0;
+    for (var i = 0; i < children.length; i++) {
+      var el = children[i];
+      if (el.type !== 1) {
+        continue
+      }
+      if (needsNormalization(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+        res = 2;
+        break
+      }
+      if (maybeComponent(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+        res = 1;
       }
     }
-    if (keys.length) {
-      code += genKeyFilter(keys);
-    }
-    // Make sure modifiers like prevent and stop get executed after key filtering
-    if (genModifierCode) {
-      code += genModifierCode;
-    }
-    var handlerCode = isMethodPath
-      ? handler.value + '($event)'
-      : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
-    return ("function($event){" + code + handlerCode + "}")
+    return res
   }
-}
 
-function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
-}
+  function needsNormalization (el) {
+    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+  }
 
-function genFilterCode (key) {
-  var keyVal = parseInt(key, 10);
-  if (keyVal) {
-    return ("$event.keyCode!==" + keyVal)
+  function genNode (node, state) {
+    if (node.type === 1) {
+      return genElement(node, state)
+    } else if (node.type === 3 && node.isComment) {
+      return genComment(node)
+    } else {
+      return genText(node)
+    }
   }
-  var code = keyCodes[key];
-  return (
-    "_k($event.keyCode," +
-    (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
-  )
-}
 
-/*  */
+  function genText (text) {
+    return ("_v(" + (text.type === 2
+      ? text.expression // no need for () because already wrapped in _s()
+      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+  }
 
-function on (el, dir) {
-  if ("development" !== 'production' && dir.modifiers) {
-    warn("v-on without argument does not support modifiers.");
+  function genComment (comment) {
+    return ("_e(" + (JSON.stringify(comment.text)) + ")")
   }
-  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
-}
 
-/*  */
+  function genSlot (el, state) {
+    var slotName = el.slotName || '"default"';
+    var children = genChildren(el, state);
+    var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+    var attrs = el.attrs || el.dynamicAttrs
+      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+          // slot props are camelized
+          name: camelize(attr.name),
+          value: attr.value,
+          dynamic: attr.dynamic
+        }); }))
+      : null;
+    var bind$$1 = el.attrsMap['v-bind'];
+    if ((attrs || bind$$1) && !children) {
+      res += ",null";
+    }
+    if (attrs) {
+      res += "," + attrs;
+    }
+    if (bind$$1) {
+      res += (attrs ? '' : ',null') + "," + bind$$1;
+    }
+    return res + ')'
+  }
 
-function bind$1 (el, dir) {
-  el.wrapData = function (code) {
-    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
-  };
-}
-
-/*  */
-
-var baseDirectives = {
-  on: on,
-  bind: bind$1,
-  cloak: noop
-};
-
-/*  */
-
-var CodegenState = function CodegenState (options) {
-  this.options = options;
-  this.warn = options.warn || baseWarn;
-  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
-  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
-  this.directives = extend(extend({}, baseDirectives), options.directives);
-  var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
-  this.onceId = 0;
-  this.staticRenderFns = [];
-};
-
-
-
-function generate (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genElement (el, state) {
-  if (el.staticRoot && !el.staticProcessed) {
-    return genStatic(el, state)
-  } else if (el.once && !el.onceProcessed) {
-    return genOnce(el, state)
-  } else if (el.for && !el.forProcessed) {
-    return genFor(el, state)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return genChildren(el, state) || 'void 0'
-  } else if (el.tag === 'slot') {
-    return genSlot(el, state)
-  } else {
-    // component or element
-    var code;
-    if (el.component) {
-      code = genComponent(el.component, el, state);
-    } else {
-      var data = el.plain ? undefined : genData$2(el, state);
-
-      var children = el.inlineTemplate ? null : genChildren(el, state, true);
-      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
-    }
-    // module transforms
-    for (var i = 0; i < state.transforms.length; i++) {
-      code = state.transforms[i](el, code);
-    }
-    return code
-  }
-}
-
-// hoist static sub-trees out
-function genStatic (el, state) {
-  el.staticProcessed = true;
-  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
-  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
-}
-
-// v-once
-function genOnce (el, state) {
-  el.onceProcessed = true;
-  if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.staticInFor) {
-    var key = '';
-    var parent = el.parent;
-    while (parent) {
-      if (parent.for) {
-        key = parent.key;
-        break
+  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
+  function genComponent (
+    componentName,
+    el,
+    state
+  ) {
+    var children = el.inlineTemplate ? null : genChildren(el, state, true);
+    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+  }
+
+  function genProps (props) {
+    var staticProps = "";
+    var dynamicProps = "";
+    for (var i = 0; i < props.length; i++) {
+      var prop = props[i];
+      var value = transformSpecialNewlines(prop.value);
+      if (prop.dynamic) {
+        dynamicProps += (prop.name) + "," + value + ",";
+      } else {
+        staticProps += "\"" + (prop.name) + "\":" + value + ",";
       }
-      parent = parent.parent;
     }
-    if (!key) {
-      "development" !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
-      );
-      return genElement(el, state)
+    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+    if (dynamicProps) {
+      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+    } else {
+      return staticProps
     }
-    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
-  } else {
-    return genStatic(el, state)
-  }
-}
-
-function genIf (
-  el,
-  state,
-  altGen,
-  altEmpty
-) {
-  el.ifProcessed = true; // avoid recursion
-  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
-}
-
-function genIfConditions (
-  conditions,
-  state,
-  altGen,
-  altEmpty
-) {
-  if (!conditions.length) {
-    return altEmpty || '_e()'
-  }
-
-  var condition = conditions.shift();
-  if (condition.exp) {
-    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
-  } else {
-    return ("" + (genTernaryExp(condition.block)))
-  }
-
-  // v-if with v-once should generate code like (a)?_m(0):_m(1)
-  function genTernaryExp (el) {
-    return altGen
-      ? altGen(el, state)
-      : el.once
-        ? genOnce(el, state)
-        : genElement(el, state)
-  }
-}
-
-function genFor (
-  el,
-  state,
-  altGen,
-  altHelper
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-
-  if ("development" !== 'production' &&
-    state.maybeComponent(el) &&
-    el.tag !== 'slot' &&
-    el.tag !== 'template' &&
-    !el.key
-  ) {
-    state.warn(
-      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
-      "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
-      true /* tip */
-    );
   }
 
-  el.forProcessed = true; // avoid recursion
-  return (altHelper || '_l') + "((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + ((altGen || genElement)(el, state)) +
-    '})'
-}
-
-function genData$2 (el, state) {
-  var data = '{';
-
-  // directives first.
-  // directives may mutate the el's other properties before they are generated.
-  var dirs = genDirectives(el, state);
-  if (dirs) { data += dirs + ','; }
-
-  // key
-  if (el.key) {
-    data += "key:" + (el.key) + ",";
-  }
-  // ref
-  if (el.ref) {
-    data += "ref:" + (el.ref) + ",";
-  }
-  if (el.refInFor) {
-    data += "refInFor:true,";
-  }
-  // pre
-  if (el.pre) {
-    data += "pre:true,";
-  }
-  // record original tag name for components using "is" attribute
-  if (el.component) {
-    data += "tag:\"" + (el.tag) + "\",";
-  }
-  // module data generation functions
-  for (var i = 0; i < state.dataGenFns.length; i++) {
-    data += state.dataGenFns[i](el);
-  }
-  // attributes
-  if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
-  }
-  // DOM props
-  if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
-  }
-  // event handlers
-  if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
-  }
-  if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
-  }
-  // slot target
-  // only for non-scoped slots
-  if (el.slotTarget && !el.slotScope) {
-    data += "slot:" + (el.slotTarget) + ",";
-  }
-  // scoped slots
-  if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
-  }
-  // component v-model
-  if (el.model) {
-    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
-  }
-  // inline-template
-  if (el.inlineTemplate) {
-    var inlineTemplate = genInlineTemplate(el, state);
-    if (inlineTemplate) {
-      data += inlineTemplate + ",";
-    }
-  }
-  data = data.replace(/,$/, '') + '}';
-  // v-bind data wrap
-  if (el.wrapData) {
-    data = el.wrapData(data);
-  }
-  // v-on data wrap
-  if (el.wrapListeners) {
-    data = el.wrapListeners(data);
-  }
-  return data
-}
-
-function genDirectives (el, state) {
-  var dirs = el.directives;
-  if (!dirs) { return }
-  var res = 'directives:[';
-  var hasRuntime = false;
-  var i, l, dir, needRuntime;
-  for (i = 0, l = dirs.length; i < l; i++) {
-    dir = dirs[i];
-    needRuntime = true;
-    var gen = state.directives[dir.name];
-    if (gen) {
-      // compile-time directive that manipulates AST.
-      // returns true if it also needs a runtime counterpart.
-      needRuntime = !!gen(el, dir, state.warn);
-    }
-    if (needRuntime) {
-      hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
-    }
-  }
-  if (hasRuntime) {
-    return res.slice(0, -1) + ']'
-  }
-}
-
-function genInlineTemplate (el, state) {
-  var ast = el.children[0];
-  if ("development" !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
-  }
-  if (ast.type === 1) {
-    var inlineRenderFns = generate(ast, state.options);
-    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
-  }
-}
-
-function genScopedSlots (
-  slots,
-  state
-) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
-}
-
-function genScopedSlot (
-  key,
-  el,
-  state
-) {
-  if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
-  }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
-    "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
-        : genChildren(el, state) || 'undefined'
-      : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
-}
-
-function genChildren (
-  el,
-  state,
-  checkSkip,
-  altGenElement,
-  altGenNode
-) {
-  var children = el.children;
-  if (children.length) {
-    var el$1 = children[0];
-    // optimize single v-for
-    if (children.length === 1 &&
-      el$1.for &&
-      el$1.tag !== 'template' &&
-      el$1.tag !== 'slot'
-    ) {
-      return (altGenElement || genElement)(el$1, state)
-    }
-    var normalizationType = checkSkip
-      ? getNormalizationType(children, state.maybeComponent)
-      : 0;
-    var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
-  }
-}
-
-// determine the normalization needed for the children array.
-// 0: no normalization needed
-// 1: simple normalization needed (possible 1-level deep nested array)
-// 2: full normalization needed
-function getNormalizationType (
-  children,
-  maybeComponent
-) {
-  var res = 0;
-  for (var i = 0; i < children.length; i++) {
-    var el = children[i];
-    if (el.type !== 1) {
-      continue
-    }
-    if (needsNormalization(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
-      res = 2;
-      break
-    }
-    if (maybeComponent(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
-      res = 1;
-    }
-  }
-  return res
-}
-
-function needsNormalization (el) {
-  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
-}
-
-function genNode (node, state) {
-  if (node.type === 1) {
-    return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
-    return genComment(node)
-  } else {
-    return genText(node)
-  }
-}
-
-function genText (text) {
-  return ("_v(" + (text.type === 2
-    ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
-}
-
-function genComment (comment) {
-  return ("_e(" + (JSON.stringify(comment.text)) + ")")
-}
-
-function genSlot (el, state) {
-  var slotName = el.slotName || '"default"';
-  var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
-  var bind$$1 = el.attrsMap['v-bind'];
-  if ((attrs || bind$$1) && !children) {
-    res += ",null";
-  }
-  if (attrs) {
-    res += "," + attrs;
-  }
-  if (bind$$1) {
-    res += (attrs ? '' : ',null') + "," + bind$$1;
-  }
-  return res + ')'
-}
-
-// componentName is el.component, take it as argument to shun flow's pessimistic refinement
-function genComponent (
-  componentName,
-  el,
-  state
-) {
-  var children = el.inlineTemplate ? null : genChildren(el, state, true);
-  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
-}
-
-function genProps (props) {
-  var res = '';
-  for (var i = 0; i < props.length; i++) {
-    var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
-    }
+  // #3895, #4268
+  function transformSpecialNewlines (text) {
+    return text
+      .replace(/\u2028/g, '\\u2028')
+      .replace(/\u2029/g, '\\u2029')
   }
-  return res.slice(0, -1)
-}
 
-// #3895, #4268
-function transformSpecialNewlines (text) {
-  return text
-    .replace(/\u2028/g, '\\u2028')
-    .replace(/\u2029/g, '\\u2029')
-}
+  /*  */
+
 
-/*  */
 
-// these keywords should not appear inside expressions, but operators like
-// typeof, instanceof and in are allowed
-var prohibitedKeywordRE = new RegExp('\\b' + (
-  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
-  'super,throw,while,yield,delete,export,import,return,switch,default,' +
-  'extends,finally,continue,debugger,function,arguments'
-).split(',').join('\\b|\\b') + '\\b');
+  // these keywords should not appear inside expressions, but operators like
+  // typeof, instanceof and in are allowed
+  var prohibitedKeywordRE = new RegExp('\\b' + (
+    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+    'super,throw,while,yield,delete,export,import,return,switch,default,' +
+    'extends,finally,continue,debugger,function,arguments'
+  ).split(',').join('\\b|\\b') + '\\b');
 
-// these unary operators should not be used as property/method names
-var unaryOperatorsRE = new RegExp('\\b' + (
-  'delete,typeof,void'
-).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+  // these unary operators should not be used as property/method names
+  var unaryOperatorsRE = new RegExp('\\b' + (
+    'delete,typeof,void'
+  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
 
-// strip strings in expressions
-var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+  // strip strings in expressions
+  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
-// detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
-  if (ast) {
-    checkNode(ast, errors);
+  // detect problematic expressions in a template
+  function detectErrors (ast, warn) {
+    if (ast) {
+      checkNode(ast, warn);
+    }
   }
-  return errors
-}
 
-function checkNode (node, errors) {
-  if (node.type === 1) {
-    for (var name in node.attrsMap) {
-      if (dirRE.test(name)) {
-        var value = node.attrsMap[name];
-        if (value) {
-          if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
-          } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
-          } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
+  function checkNode (node, warn) {
+    if (node.type === 1) {
+      for (var name in node.attrsMap) {
+        if (dirRE.test(name)) {
+          var value = node.attrsMap[name];
+          if (value) {
+            var range = node.rawAttrsMap[name];
+            if (name === 'v-for') {
+              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+            } else if (name === 'v-slot' || name[0] === '#') {
+              checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+            } else if (onRE.test(name)) {
+              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+            } else {
+              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+            }
           }
         }
       }
-    }
-    if (node.children) {
-      for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+      if (node.children) {
+        for (var i = 0; i < node.children.length; i++) {
+          checkNode(node.children[i], warn);
+        }
       }
+    } else if (node.type === 2) {
+      checkExpression(node.expression, node.text, warn, node);
     }
-  } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
   }
-}
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
-      "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
-    );
+  function checkEvent (exp, text, warn, range) {
+    var stripped = exp.replace(stripStringRE, '');
+    var keywordMatch = stripped.match(unaryOperatorsRE);
+    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+      warn(
+        "avoid using JavaScript unary operator as property name: " +
+        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+        range
+      );
+    }
+    checkExpression(exp, text, warn, range);
+  }
+
+  function checkFor (node, text, warn, range) {
+    checkExpression(node.for || '', text, warn, range);
+    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+  }
+
+  function checkIdentifier (
+    ident,
+    type,
+    text,
+    warn,
+    range
+  ) {
+    if (typeof ident === 'string') {
+      try {
+        new Function(("var " + ident + "=_"));
+      } catch (e) {
+        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+      }
+    }
   }
-  checkExpression(exp, text, errors);
-}
-
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
-}
-
-function checkIdentifier (
-  ident,
-  type,
-  text,
-  errors
-) {
-  if (typeof ident === 'string') {
+
+  function checkExpression (exp, text, warn, range) {
     try {
-      new Function(("var " + ident + "=_"));
+      new Function(("return " + exp));
     } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+      if (keywordMatch) {
+        warn(
+          "avoid using JavaScript keyword as property name: " +
+          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+          range
+        );
+      } else {
+        warn(
+          "invalid expression: " + (e.message) + " in\n\n" +
+          "    " + exp + "\n\n" +
+          "  Raw expression: " + (text.trim()) + "\n",
+          range
+        );
+      }
     }
   }
-}
 
-function checkExpression (exp, text, errors) {
-  try {
-    new Function(("return " + exp));
-  } catch (e) {
-    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-    if (keywordMatch) {
-      errors.push(
-        "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
-      );
-    } else {
-      errors.push(
-        "invalid expression: " + (e.message) + " in\n\n" +
+  function checkFunctionParameterExpression (exp, text, warn, range) {
+    try {
+      new Function(exp, '');
+    } catch (e) {
+      warn(
+        "invalid function parameter expression: " + (e.message) + " in\n\n" +
         "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
       );
     }
   }
-}
-
-/*  */
 
-function createFunction (code, errors) {
-  try {
-    return new Function(code)
-  } catch (err) {
-    errors.push({ err: err, code: code });
-    return noop
-  }
-}
+  /*  */
 
-function createCompileToFunctionFn (compile) {
-  var cache = Object.create(null);
+  var range = 2;
 
-  return function compileToFunctions (
-    template,
-    options,
-    vm
+  function generateCodeFrame (
+    source,
+    start,
+    end
   ) {
-    options = extend({}, options);
-    var warn$$1 = options.warn || warn;
-    delete options.warn;
+    if ( start === void 0 ) start = 0;
+    if ( end === void 0 ) end = source.length;
 
-    /* istanbul ignore if */
-    {
-      // detect possible CSP restriction
-      try {
-        new Function('return 1');
-      } catch (e) {
-        if (e.toString().match(/unsafe-eval|CSP/)) {
-          warn$$1(
-            'It seems you are using the standalone build of Vue.js in an ' +
-            'environment with Content Security Policy that prohibits unsafe-eval. ' +
-            'The template compiler cannot work in this environment. Consider ' +
-            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
-            'templates into render functions.'
-          );
+    var lines = source.split(/\r?\n/);
+    var count = 0;
+    var res = [];
+    for (var i = 0; i < lines.length; i++) {
+      count += lines[i].length + 1;
+      if (count >= start) {
+        for (var j = i - range; j <= i + range || end > count; j++) {
+          if (j < 0 || j >= lines.length) { continue }
+          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+          var lineLength = lines[j].length;
+          if (j === i) {
+            // push underline
+            var pad = start - (count - lineLength) + 1;
+            var length = end > count ? lineLength - pad : end - start;
+            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+          } else if (j > i) {
+            if (end > count) {
+              var length$1 = Math.min(end - count, lineLength);
+              res.push("   |  " + repeat$1("^", length$1));
+            }
+            count += lineLength + 1;
+          }
         }
+        break
       }
     }
+    return res.join('\n')
+  }
 
-    // check cache
-    var key = options.delimiters
-      ? String(options.delimiters) + template
-      : template;
-    if (cache[key]) {
-      return cache[key]
+  function repeat$1 (str, n) {
+    var result = '';
+    if (n > 0) {
+      while (true) { // eslint-disable-line
+        if (n & 1) { result += str; }
+        n >>>= 1;
+        if (n <= 0) { break }
+        str += str;
+      }
     }
+    return result
+  }
 
-    // compile
-    var compiled = compile(template, options);
+  /*  */
 
-    // check compilation errors/tips
-    {
-      if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
-      }
-      if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
-      }
-    }
 
-    // turn code into functions
-    var res = {};
-    var fnGenErrors = [];
-    res.render = createFunction(compiled.render, fnGenErrors);
-    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
-      return createFunction(code, fnGenErrors)
-    });
 
-    // check function generation errors.
-    // this should only happen if there is a bug in the compiler itself.
-    // mostly for codegen development use
-    /* istanbul ignore if */
-    {
-      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
-        warn$$1(
-          "Failed to generate render function:\n\n" +
-          fnGenErrors.map(function (ref) {
-            var err = ref.err;
-            var code = ref.code;
-
-            return ((err.toString()) + " in\n\n" + code + "\n");
-        }).join('\n'),
-          vm
-        );
-      }
+  function createFunction (code, errors) {
+    try {
+      return new Function(code)
+    } catch (err) {
+      errors.push({ err: err, code: code });
+      return noop
     }
-
-    return (cache[key] = res)
   }
-}
 
-/*  */
+  function createCompileToFunctionFn (compile) {
+    var cache = Object.create(null);
 
-function createCompilerCreator (baseCompile) {
-  return function createCompiler (baseOptions) {
-    function compile (
+    return function compileToFunctions (
       template,
-      options
+      options,
+      vm
     ) {
-      var finalOptions = Object.create(baseOptions);
-      var errors = [];
-      var tips = [];
-      finalOptions.warn = function (msg, tip) {
-        (tip ? tips : errors).push(msg);
-      };
+      options = extend({}, options);
+      var warn$$1 = options.warn || warn;
+      delete options.warn;
 
-      if (options) {
-        // merge custom modules
-        if (options.modules) {
-          finalOptions.modules =
-            (baseOptions.modules || []).concat(options.modules);
-        }
-        // merge custom directives
-        if (options.directives) {
-          finalOptions.directives = extend(
-            Object.create(baseOptions.directives || null),
-            options.directives
-          );
+      /* istanbul ignore if */
+      {
+        // detect possible CSP restriction
+        try {
+          new Function('return 1');
+        } catch (e) {
+          if (e.toString().match(/unsafe-eval|CSP/)) {
+            warn$$1(
+              'It seems you are using the standalone build of Vue.js in an ' +
+              'environment with Content Security Policy that prohibits unsafe-eval. ' +
+              'The template compiler cannot work in this environment. Consider ' +
+              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+              'templates into render functions.'
+            );
+          }
+        }
+      }
+
+      // check cache
+      var key = options.delimiters
+        ? String(options.delimiters) + template
+        : template;
+      if (cache[key]) {
+        return cache[key]
+      }
+
+      // compile
+      var compiled = compile(template, options);
+
+      // check compilation errors/tips
+      {
+        if (compiled.errors && compiled.errors.length) {
+          if (options.outputSourceRange) {
+            compiled.errors.forEach(function (e) {
+              warn$$1(
+                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+                generateCodeFrame(template, e.start, e.end),
+                vm
+              );
+            });
+          } else {
+            warn$$1(
+              "Error compiling template:\n\n" + template + "\n\n" +
+              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+              vm
+            );
+          }
         }
-        // copy other options
-        for (var key in options) {
-          if (key !== 'modules' && key !== 'directives') {
-            finalOptions[key] = options[key];
+        if (compiled.tips && compiled.tips.length) {
+          if (options.outputSourceRange) {
+            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+          } else {
+            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
           }
         }
       }
 
-      var compiled = baseCompile(template, finalOptions);
+      // turn code into functions
+      var res = {};
+      var fnGenErrors = [];
+      res.render = createFunction(compiled.render, fnGenErrors);
+      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+        return createFunction(code, fnGenErrors)
+      });
+
+      // check function generation errors.
+      // this should only happen if there is a bug in the compiler itself.
+      // mostly for codegen development use
+      /* istanbul ignore if */
       {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+          warn$$1(
+            "Failed to generate render function:\n\n" +
+            fnGenErrors.map(function (ref) {
+              var err = ref.err;
+              var code = ref.code;
+
+              return ((err.toString()) + " in\n\n" + code + "\n");
+          }).join('\n'),
+            vm
+          );
+        }
       }
-      compiled.errors = errors;
-      compiled.tips = tips;
-      return compiled
-    }
 
-    return {
-      compile: compile,
-      compileToFunctions: createCompileToFunctionFn(compile)
+      return (cache[key] = res)
     }
   }
-}
 
-/*  */
+  /*  */
 
-// `createCompilerCreator` allows creating compilers that use alternative
-// parser/optimizer/codegen, e.g the SSR optimizing compiler.
-// Here we just export a default compiler using the default parts.
-var createCompiler = createCompilerCreator(function baseCompile (
-  template,
-  options
-) {
-  var ast = parse(template.trim(), options);
-  if (options.optimize !== false) {
-    optimize(ast, options);
-  }
-  var code = generate(ast, options);
-  return {
-    ast: ast,
-    render: code.render,
-    staticRenderFns: code.staticRenderFns
-  }
-});
+  function createCompilerCreator (baseCompile) {
+    return function createCompiler (baseOptions) {
+      function compile (
+        template,
+        options
+      ) {
+        var finalOptions = Object.create(baseOptions);
+        var errors = [];
+        var tips = [];
+
+        var warn = function (msg, range, tip) {
+          (tip ? tips : errors).push(msg);
+        };
+
+        if (options) {
+          if (options.outputSourceRange) {
+            // $flow-disable-line
+            var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+            warn = function (msg, range, tip) {
+              var data = { msg: msg };
+              if (range) {
+                if (range.start != null) {
+                  data.start = range.start + leadingSpaceLength;
+                }
+                if (range.end != null) {
+                  data.end = range.end + leadingSpaceLength;
+                }
+              }
+              (tip ? tips : errors).push(data);
+            };
+          }
+          // merge custom modules
+          if (options.modules) {
+            finalOptions.modules =
+              (baseOptions.modules || []).concat(options.modules);
+          }
+          // merge custom directives
+          if (options.directives) {
+            finalOptions.directives = extend(
+              Object.create(baseOptions.directives || null),
+              options.directives
+            );
+          }
+          // copy other options
+          for (var key in options) {
+            if (key !== 'modules' && key !== 'directives') {
+              finalOptions[key] = options[key];
+            }
+          }
+        }
 
-/*  */
+        finalOptions.warn = warn;
 
-var ref$1 = createCompiler(baseOptions);
-var compileToFunctions = ref$1.compileToFunctions;
+        var compiled = baseCompile(template.trim(), finalOptions);
+        {
+          detectErrors(compiled.ast, warn);
+        }
+        compiled.errors = errors;
+        compiled.tips = tips;
+        return compiled
+      }
 
-/*  */
+      return {
+        compile: compile,
+        compileToFunctions: createCompileToFunctionFn(compile)
+      }
+    }
+  }
 
-// check whether current browser encodes a char inside attribute values
-var div;
-function getShouldDecode (href) {
-  div = div || document.createElement('div');
-  div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
-  return div.innerHTML.indexOf('&#10;') > 0
-}
+  /*  */
 
-// #3663: IE encodes newlines inside attribute values while other browsers don't
-var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
-// #6828: chrome encodes content in a[href]
-var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+  // `createCompilerCreator` allows creating compilers that use alternative
+  // parser/optimizer/codegen, e.g the SSR optimizing compiler.
+  // Here we just export a default compiler using the default parts.
+  var createCompiler = createCompilerCreator(function baseCompile (
+    template,
+    options
+  ) {
+    var ast = parse(template.trim(), options);
+    if (options.optimize !== false) {
+      optimize(ast, options);
+    }
+    var code = generate(ast, options);
+    return {
+      ast: ast,
+      render: code.render,
+      staticRenderFns: code.staticRenderFns
+    }
+  });
 
-/*  */
+  /*  */
 
-var idToTemplate = cached(function (id) {
-  var el = query(id);
-  return el && el.innerHTML
-});
+  var ref$1 = createCompiler(baseOptions);
+  var compile = ref$1.compile;
+  var compileToFunctions = ref$1.compileToFunctions;
 
-var mount = Vue$3.prototype.$mount;
-Vue$3.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && query(el);
+  /*  */
 
-  /* istanbul ignore if */
-  if (el === document.body || el === document.documentElement) {
-    "development" !== 'production' && warn(
-      "Do not mount Vue to <html> or <body> - mount to normal elements instead."
-    );
-    return this
+  // check whether current browser encodes a char inside attribute values
+  var div;
+  function getShouldDecode (href) {
+    div = div || document.createElement('div');
+    div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
+    return div.innerHTML.indexOf('&#10;') > 0
   }
 
-  var options = this.$options;
-  // resolve template/el and convert to render function
-  if (!options.render) {
-    var template = options.template;
-    if (template) {
-      if (typeof template === 'string') {
-        if (template.charAt(0) === '#') {
-          template = idToTemplate(template);
-          /* istanbul ignore if */
-          if ("development" !== 'production' && !template) {
-            warn(
-              ("Template element not found or is empty: " + (options.template)),
-              this
-            );
+  // #3663: IE encodes newlines inside attribute values while other browsers don't
+  var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false;
+  // #6828: chrome encodes content in a[href]
+  var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
+
+  /*  */
+
+  var idToTemplate = cached(function (id) {
+    var el = query(id);
+    return el && el.innerHTML
+  });
+
+  var mount = Vue.prototype.$mount;
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
+  ) {
+    el = el && query(el);
+
+    /* istanbul ignore if */
+    if (el === document.body || el === document.documentElement) {
+      warn(
+        "Do not mount Vue to <html> or <body> - mount to normal elements instead."
+      );
+      return this
+    }
+
+    var options = this.$options;
+    // resolve template/el and convert to render function
+    if (!options.render) {
+      var template = options.template;
+      if (template) {
+        if (typeof template === 'string') {
+          if (template.charAt(0) === '#') {
+            template = idToTemplate(template);
+            /* istanbul ignore if */
+            if (!template) {
+              warn(
+                ("Template element not found or is empty: " + (options.template)),
+                this
+              );
+            }
           }
+        } else if (template.nodeType) {
+          template = template.innerHTML;
+        } else {
+          {
+            warn('invalid template option:' + template, this);
+          }
+          return this
         }
-      } else if (template.nodeType) {
-        template = template.innerHTML;
-      } else {
-        {
-          warn('invalid template option:' + template, this);
-        }
-        return this
-      }
-    } else if (el) {
-      template = getOuterHTML(el);
-    }
-    if (template) {
-      /* istanbul ignore if */
-      if ("development" !== 'production' && config.performance && mark) {
-        mark('compile');
+      } else if (el) {
+        template = getOuterHTML(el);
       }
+      if (template) {
+        /* istanbul ignore if */
+        if (config.performance && mark) {
+          mark('compile');
+        }
 
-      var ref = compileToFunctions(template, {
-        shouldDecodeNewlines: shouldDecodeNewlines,
-        shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
-        delimiters: options.delimiters,
-        comments: options.comments
-      }, this);
-      var render = ref.render;
-      var staticRenderFns = ref.staticRenderFns;
-      options.render = render;
-      options.staticRenderFns = staticRenderFns;
+        var ref = compileToFunctions(template, {
+          outputSourceRange: "development" !== 'production',
+          shouldDecodeNewlines: shouldDecodeNewlines,
+          shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
+          delimiters: options.delimiters,
+          comments: options.comments
+        }, this);
+        var render = ref.render;
+        var staticRenderFns = ref.staticRenderFns;
+        options.render = render;
+        options.staticRenderFns = staticRenderFns;
 
-      /* istanbul ignore if */
-      if ("development" !== 'production' && config.performance && mark) {
-        mark('compile end');
-        measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+        /* istanbul ignore if */
+        if (config.performance && mark) {
+          mark('compile end');
+          measure(("vue " + (this._name) + " compile"), 'compile', 'compile end');
+        }
       }
     }
-  }
-  return mount.call(this, el, hydrating)
-};
+    return mount.call(this, el, hydrating)
+  };
 
-/**
- * Get outerHTML of elements, taking care
- * of SVG elements in IE as well.
- */
-function getOuterHTML (el) {
-  if (el.outerHTML) {
-    return el.outerHTML
-  } else {
-    var container = document.createElement('div');
-    container.appendChild(el.cloneNode(true));
-    return container.innerHTML
+  /**
+   * Get outerHTML of elements, taking care
+   * of SVG elements in IE as well.
+   */
+  function getOuterHTML (el) {
+    if (el.outerHTML) {
+      return el.outerHTML
+    } else {
+      var container = document.createElement('div');
+      container.appendChild(el.cloneNode(true));
+      return container.innerHTML
+    }
   }
-}
 
-Vue$3.compile = compileToFunctions;
+  Vue.compile = compileToFunctions;
 
-return Vue$3;
+  return Vue;
 
-})));
+}));
diff --git a/dist/vue.min.js b/dist/vue.min.js
index 836793b4caf..d998ff72e4f 100644
--- a/dist/vue.min.js
+++ b/dist/vue.min.js
@@ -1,6 +1,6 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.Vue=e()}(this,function(){"use strict";function t(t){return void 0===t||null===t}function e(t){return void 0!==t&&null!==t}function n(t){return!0===t}function r(t){return"string"==typeof t||"number"==typeof t||"symbol"==typeof t||"boolean"==typeof t}function i(t){return null!==t&&"object"==typeof t}function o(t){return"[object Object]"===Nn.call(t)}function a(t){var e=parseFloat(String(t));return e>=0&&Math.floor(e)===e&&isFinite(t)}function s(t){return null==t?"":"object"==typeof t?JSON.stringify(t,null,2):String(t)}function c(t){var e=parseFloat(t);return isNaN(e)?t:e}function u(t,e){for(var n=Object.create(null),r=t.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return e?function(t){return n[t.toLowerCase()]}:function(t){return n[t]}}function l(t,e){if(t.length){var n=t.indexOf(e);if(n>-1)return t.splice(n,1)}}function f(t,e){return Mn.call(t,e)}function 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\ No newline at end of file
diff --git a/dist/vue.runtime.common.dev.js b/dist/vue.runtime.common.dev.js
new file mode 100644
index 00000000000..954310c890c
--- /dev/null
+++ b/dist/vue.runtime.common.dev.js
@@ -0,0 +1,8467 @@
+/*!
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
+ * Released under the MIT License.
+ */
+'use strict';
+
+/*  */
+
+var emptyObject = Object.freeze({});
+
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
+
+function isDef (v) {
+  return v !== undefined && v !== null
+}
+
+function isTrue (v) {
+  return v === true
+}
+
+function isFalse (v) {
+  return v === false
+}
+
+/**
+ * Check if value is primitive.
+ */
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
+
+/**
+ * Quick object check - this is primarily used to tell
+ * Objects from primitive values when we know the value
+ * is a JSON-compliant type.
+ */
+function isObject (obj) {
+  return obj !== null && typeof obj === 'object'
+}
+
+/**
+ * Get the raw type string of a value, e.g., [object Object].
+ */
+var _toString = Object.prototype.toString;
+
+function toRawType (value) {
+  return _toString.call(value).slice(8, -1)
+}
+
+/**
+ * Strict object type check. Only returns true
+ * for plain JavaScript objects.
+ */
+function isPlainObject (obj) {
+  return _toString.call(obj) === '[object Object]'
+}
+
+function isRegExp (v) {
+  return _toString.call(v) === '[object RegExp]'
+}
+
+/**
+ * Check if val is a valid array index.
+ */
+function isValidArrayIndex (val) {
+  var n = parseFloat(String(val));
+  return n >= 0 && Math.floor(n) === n && isFinite(val)
+}
+
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
+/**
+ * Convert a value to a string that is actually rendered.
+ */
+function toString (val) {
+  return val == null
+    ? ''
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+      ? JSON.stringify(val, null, 2)
+      : String(val)
+}
+
+/**
+ * Convert an input value to a number for persistence.
+ * If the conversion fails, return original string.
+ */
+function toNumber (val) {
+  var n = parseFloat(val);
+  return isNaN(n) ? val : n
+}
+
+/**
+ * Make a map and return a function for checking if a key
+ * is in that map.
+ */
+function makeMap (
+  str,
+  expectsLowerCase
+) {
+  var map = Object.create(null);
+  var list = str.split(',');
+  for (var i = 0; i < list.length; i++) {
+    map[list[i]] = true;
+  }
+  return expectsLowerCase
+    ? function (val) { return map[val.toLowerCase()]; }
+    : function (val) { return map[val]; }
+}
+
+/**
+ * Check if a tag is a built-in tag.
+ */
+var isBuiltInTag = makeMap('slot,component', true);
+
+/**
+ * Check if an attribute is a reserved attribute.
+ */
+var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+
+/**
+ * Remove an item from an array.
+ */
+function remove (arr, item) {
+  if (arr.length) {
+    var index = arr.indexOf(item);
+    if (index > -1) {
+      return arr.splice(index, 1)
+    }
+  }
+}
+
+/**
+ * Check whether an object has the property.
+ */
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+function hasOwn (obj, key) {
+  return hasOwnProperty.call(obj, key)
+}
+
+/**
+ * Create a cached version of a pure function.
+ */
+function cached (fn) {
+  var cache = Object.create(null);
+  return (function cachedFn (str) {
+    var hit = cache[str];
+    return hit || (cache[str] = fn(str))
+  })
+}
+
+/**
+ * Camelize a hyphen-delimited string.
+ */
+var camelizeRE = /-(\w)/g;
+var camelize = cached(function (str) {
+  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+});
+
+/**
+ * Capitalize a string.
+ */
+var capitalize = cached(function (str) {
+  return str.charAt(0).toUpperCase() + str.slice(1)
+});
+
+/**
+ * Hyphenate a camelCase string.
+ */
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
+
+/**
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
+ */
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
+
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
+/**
+ * Convert an Array-like object to a real Array.
+ */
+function toArray (list, start) {
+  start = start || 0;
+  var i = list.length - start;
+  var ret = new Array(i);
+  while (i--) {
+    ret[i] = list[i + start];
+  }
+  return ret
+}
+
+/**
+ * Mix properties into target object.
+ */
+function extend (to, _from) {
+  for (var key in _from) {
+    to[key] = _from[key];
+  }
+  return to
+}
+
+/**
+ * Merge an Array of Objects into a single Object.
+ */
+function toObject (arr) {
+  var res = {};
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i]) {
+      extend(res, arr[i]);
+    }
+  }
+  return res
+}
+
+/* eslint-disable no-unused-vars */
+
+/**
+ * Perform no operation.
+ * Stubbing args to make Flow happy without leaving useless transpiled code
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+ */
+function noop (a, b, c) {}
+
+/**
+ * Always return false.
+ */
+var no = function (a, b, c) { return false; };
+
+/* eslint-enable no-unused-vars */
+
+/**
+ * Return the same value.
+ */
+var identity = function (_) { return _; };
+
+/**
+ * Check if two values are loosely equal - that is,
+ * if they are plain objects, do they have the same shape?
+ */
+function looseEqual (a, b) {
+  if (a === b) { return true }
+  var isObjectA = isObject(a);
+  var isObjectB = isObject(b);
+  if (isObjectA && isObjectB) {
+    try {
+      var isArrayA = Array.isArray(a);
+      var isArrayB = Array.isArray(b);
+      if (isArrayA && isArrayB) {
+        return a.length === b.length && a.every(function (e, i) {
+          return looseEqual(e, b[i])
+        })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
+      } else if (!isArrayA && !isArrayB) {
+        var keysA = Object.keys(a);
+        var keysB = Object.keys(b);
+        return keysA.length === keysB.length && keysA.every(function (key) {
+          return looseEqual(a[key], b[key])
+        })
+      } else {
+        /* istanbul ignore next */
+        return false
+      }
+    } catch (e) {
+      /* istanbul ignore next */
+      return false
+    }
+  } else if (!isObjectA && !isObjectB) {
+    return String(a) === String(b)
+  } else {
+    return false
+  }
+}
+
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
+function looseIndexOf (arr, val) {
+  for (var i = 0; i < arr.length; i++) {
+    if (looseEqual(arr[i], val)) { return i }
+  }
+  return -1
+}
+
+/**
+ * Ensure a function is called only once.
+ */
+function once (fn) {
+  var called = false;
+  return function () {
+    if (!called) {
+      called = true;
+      fn.apply(this, arguments);
+    }
+  }
+}
+
+var SSR_ATTR = 'data-server-rendered';
+
+var ASSET_TYPES = [
+  'component',
+  'directive',
+  'filter'
+];
+
+var LIFECYCLE_HOOKS = [
+  'beforeCreate',
+  'created',
+  'beforeMount',
+  'mounted',
+  'beforeUpdate',
+  'updated',
+  'beforeDestroy',
+  'destroyed',
+  'activated',
+  'deactivated',
+  'errorCaptured',
+  'serverPrefetch'
+];
+
+/*  */
+
+
+
+var config = ({
+  /**
+   * Option merge strategies (used in core/util/options)
+   */
+  // $flow-disable-line
+  optionMergeStrategies: Object.create(null),
+
+  /**
+   * Whether to suppress warnings.
+   */
+  silent: false,
+
+  /**
+   * Show production mode tip message on boot?
+   */
+  productionTip: "development" !== 'production',
+
+  /**
+   * Whether to enable devtools
+   */
+  devtools: "development" !== 'production',
+
+  /**
+   * Whether to record perf
+   */
+  performance: false,
+
+  /**
+   * Error handler for watcher errors
+   */
+  errorHandler: null,
+
+  /**
+   * Warn handler for watcher warns
+   */
+  warnHandler: null,
+
+  /**
+   * Ignore certain custom elements
+   */
+  ignoredElements: [],
+
+  /**
+   * Custom user key aliases for v-on
+   */
+  // $flow-disable-line
+  keyCodes: Object.create(null),
+
+  /**
+   * Check if a tag is reserved so that it cannot be registered as a
+   * component. This is platform-dependent and may be overwritten.
+   */
+  isReservedTag: no,
+
+  /**
+   * Check if an attribute is reserved so that it cannot be used as a component
+   * prop. This is platform-dependent and may be overwritten.
+   */
+  isReservedAttr: no,
+
+  /**
+   * Check if a tag is an unknown element.
+   * Platform-dependent.
+   */
+  isUnknownElement: no,
+
+  /**
+   * Get the namespace of an element
+   */
+  getTagNamespace: noop,
+
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
+  /**
+   * Check if an attribute must be bound using property, e.g. value
+   * Platform-dependent.
+   */
+  mustUseProp: no,
+
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
+  /**
+   * Exposed for legacy reasons
+   */
+  _lifecycleHooks: LIFECYCLE_HOOKS
+});
+
+/*  */
+
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Check if a string starts with $ or _
+ */
+function isReserved (str) {
+  var c = (str + '').charCodeAt(0);
+  return c === 0x24 || c === 0x5F
+}
+
+/**
+ * Define a property.
+ */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
+
+/**
+ * Parse simple path.
+ */
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+function parsePath (path) {
+  if (bailRE.test(path)) {
+    return
+  }
+  var segments = path.split('.');
+  return function (obj) {
+    for (var i = 0; i < segments.length; i++) {
+      if (!obj) { return }
+      obj = obj[segments[i]];
+    }
+    return obj
+  }
+}
+
+/*  */
+
+// can we use __proto__?
+var hasProto = '__proto__' in {};
+
+// Browser environment sniffing
+var inBrowser = typeof window !== 'undefined';
+var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+var isIE = UA && /msie|trident/.test(UA);
+var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+var isEdge = UA && UA.indexOf('edge/') > 0;
+var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+// Firefox has a "watch" function on Object.prototype...
+var nativeWatch = ({}).watch;
+
+var supportsPassive = false;
+if (inBrowser) {
+  try {
+    var opts = {};
+    Object.defineProperty(opts, 'passive', ({
+      get: function get () {
+        /* istanbul ignore next */
+        supportsPassive = true;
+      }
+    })); // https://github.com/facebook/flow/issues/285
+    window.addEventListener('test-passive', null, opts);
+  } catch (e) {}
+}
+
+// this needs to be lazy-evaled because vue may be required before
+// vue-server-renderer can set VUE_ENV
+var _isServer;
+var isServerRendering = function () {
+  if (_isServer === undefined) {
+    /* istanbul ignore if */
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+      // detect presence of vue-server-renderer and avoid
+      // Webpack shimming the process
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+    } else {
+      _isServer = false;
+    }
+  }
+  return _isServer
+};
+
+// detect devtools
+var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+/* istanbul ignore next */
+function isNative (Ctor) {
+  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+}
+
+var hasSymbol =
+  typeof Symbol !== 'undefined' && isNative(Symbol) &&
+  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+var _Set;
+/* istanbul ignore if */ // $flow-disable-line
+if (typeof Set !== 'undefined' && isNative(Set)) {
+  // use native Set when available.
+  _Set = Set;
+} else {
+  // a non-standard Set polyfill that only works with primitive keys.
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
+}
+
+/*  */
+
+var warn = noop;
+var tip = noop;
+var generateComponentTrace = (noop); // work around flow check
+var formatComponentName = (noop);
+
+{
+  var hasConsole = typeof console !== 'undefined';
+  var classifyRE = /(?:^|[-_])(\w)/g;
+  var classify = function (str) { return str
+    .replace(classifyRE, function (c) { return c.toUpperCase(); })
+    .replace(/[-_]/g, ''); };
+
+  warn = function (msg, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+
+    if (config.warnHandler) {
+      config.warnHandler.call(null, msg, vm, trace);
+    } else if (hasConsole && (!config.silent)) {
+      console.error(("[Vue warn]: " + msg + trace));
+    }
+  };
+
+  tip = function (msg, vm) {
+    if (hasConsole && (!config.silent)) {
+      console.warn("[Vue tip]: " + msg + (
+        vm ? generateComponentTrace(vm) : ''
+      ));
+    }
+  };
+
+  formatComponentName = function (vm, includeFile) {
+    if (vm.$root === vm) {
+      return '<Root>'
+    }
+    var options = typeof vm === 'function' && vm.cid != null
+      ? vm.options
+      : vm._isVue
+        ? vm.$options || vm.constructor.options
+        : vm;
+    var name = options.name || options._componentTag;
+    var file = options.__file;
+    if (!name && file) {
+      var match = file.match(/([^/\\]+)\.vue$/);
+      name = match && match[1];
+    }
+
+    return (
+      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+      (file && includeFile !== false ? (" at " + file) : '')
+    )
+  };
+
+  var repeat = function (str, n) {
+    var res = '';
+    while (n) {
+      if (n % 2 === 1) { res += str; }
+      if (n > 1) { str += str; }
+      n >>= 1;
+    }
+    return res
+  };
+
+  generateComponentTrace = function (vm) {
+    if (vm._isVue && vm.$parent) {
+      var tree = [];
+      var currentRecursiveSequence = 0;
+      while (vm) {
+        if (tree.length > 0) {
+          var last = tree[tree.length - 1];
+          if (last.constructor === vm.constructor) {
+            currentRecursiveSequence++;
+            vm = vm.$parent;
+            continue
+          } else if (currentRecursiveSequence > 0) {
+            tree[tree.length - 1] = [last, currentRecursiveSequence];
+            currentRecursiveSequence = 0;
+          }
+        }
+        tree.push(vm);
+        vm = vm.$parent;
+      }
+      return '\n\nfound in\n\n' + tree
+        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+            : formatComponentName(vm))); })
+        .join('\n')
+    } else {
+      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+    }
+  };
+}
+
+/*  */
+
+var uid = 0;
+
+/**
+ * A dep is an observable that can have multiple
+ * directives subscribing to it.
+ */
+var Dep = function Dep () {
+  this.id = uid++;
+  this.subs = [];
+};
+
+Dep.prototype.addSub = function addSub (sub) {
+  this.subs.push(sub);
+};
+
+Dep.prototype.removeSub = function removeSub (sub) {
+  remove(this.subs, sub);
+};
+
+Dep.prototype.depend = function depend () {
+  if (Dep.target) {
+    Dep.target.addDep(this);
+  }
+};
+
+Dep.prototype.notify = function notify () {
+  // stabilize the subscriber list first
+  var subs = this.subs.slice();
+  if (!config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
+  for (var i = 0, l = subs.length; i < l; i++) {
+    subs[i].update();
+  }
+};
+
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
+Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
+
+/*  */
+
+var VNode = function VNode (
+  tag,
+  data,
+  children,
+  text,
+  elm,
+  context,
+  componentOptions,
+  asyncFactory
+) {
+  this.tag = tag;
+  this.data = data;
+  this.children = children;
+  this.text = text;
+  this.elm = elm;
+  this.ns = undefined;
+  this.context = context;
+  this.fnContext = undefined;
+  this.fnOptions = undefined;
+  this.fnScopeId = undefined;
+  this.key = data && data.key;
+  this.componentOptions = componentOptions;
+  this.componentInstance = undefined;
+  this.parent = undefined;
+  this.raw = false;
+  this.isStatic = false;
+  this.isRootInsert = true;
+  this.isComment = false;
+  this.isCloned = false;
+  this.isOnce = false;
+  this.asyncFactory = asyncFactory;
+  this.asyncMeta = undefined;
+  this.isAsyncPlaceholder = false;
+};
+
+var prototypeAccessors = { child: { configurable: true } };
+
+// DEPRECATED: alias for componentInstance for backwards compat.
+/* istanbul ignore next */
+prototypeAccessors.child.get = function () {
+  return this.componentInstance
+};
+
+Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+var createEmptyVNode = function (text) {
+  if ( text === void 0 ) text = '';
+
+  var node = new VNode();
+  node.text = text;
+  node.isComment = true;
+  return node
+};
+
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
+// optimized shallow clone
+// used for static nodes and slot nodes because they may be reused across
+// multiple renders, cloning them avoids errors when DOM manipulations rely
+// on their elm reference.
+function cloneVNode (vnode) {
+  var cloned = new VNode(
+    vnode.tag,
+    vnode.data,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
+    vnode.text,
+    vnode.elm,
+    vnode.context,
+    vnode.componentOptions,
+    vnode.asyncFactory
+  );
+  cloned.ns = vnode.ns;
+  cloned.isStatic = vnode.isStatic;
+  cloned.key = vnode.key;
+  cloned.isComment = vnode.isComment;
+  cloned.fnContext = vnode.fnContext;
+  cloned.fnOptions = vnode.fnOptions;
+  cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
+  cloned.isCloned = true;
+  return cloned
+}
+
+/*
+ * not type checking this file because flow doesn't play well with
+ * dynamically accessing methods on Array prototype
+ */
+
+var arrayProto = Array.prototype;
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
+  'push',
+  'pop',
+  'shift',
+  'unshift',
+  'splice',
+  'sort',
+  'reverse'
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
+  // cache original method
+  var original = arrayProto[method];
+  def(arrayMethods, method, function mutator () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    var result = original.apply(this, args);
+    var ob = this.__ob__;
+    var inserted;
+    switch (method) {
+      case 'push':
+      case 'unshift':
+        inserted = args;
+        break
+      case 'splice':
+        inserted = args.slice(2);
+        break
+    }
+    if (inserted) { ob.observeArray(inserted); }
+    // notify change
+    ob.dep.notify();
+    return result
+  });
+});
+
+/*  */
+
+var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+
+/**
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
+ */
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
+
+/**
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
+ * object's property keys into getter/setters that
+ * collect dependencies and dispatch updates.
+ */
+var Observer = function Observer (value) {
+  this.value = value;
+  this.dep = new Dep();
+  this.vmCount = 0;
+  def(value, '__ob__', this);
+  if (Array.isArray(value)) {
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
+    this.observeArray(value);
+  } else {
+    this.walk(value);
+  }
+};
+
+/**
+ * Walk through all properties and convert them into
+ * getter/setters. This method should only be called when
+ * value type is Object.
+ */
+Observer.prototype.walk = function walk (obj) {
+  var keys = Object.keys(obj);
+  for (var i = 0; i < keys.length; i++) {
+    defineReactive$$1(obj, keys[i]);
+  }
+};
+
+/**
+ * Observe a list of Array items.
+ */
+Observer.prototype.observeArray = function observeArray (items) {
+  for (var i = 0, l = items.length; i < l; i++) {
+    observe(items[i]);
+  }
+};
+
+// helpers
+
+/**
+ * Augment a target Object or Array by intercepting
+ * the prototype chain using __proto__
+ */
+function protoAugment (target, src) {
+  /* eslint-disable no-proto */
+  target.__proto__ = src;
+  /* eslint-enable no-proto */
+}
+
+/**
+ * Augment a target Object or Array by defining
+ * hidden properties.
+ */
+/* istanbul ignore next */
+function copyAugment (target, src, keys) {
+  for (var i = 0, l = keys.length; i < l; i++) {
+    var key = keys[i];
+    def(target, key, src[key]);
+  }
+}
+
+/**
+ * Attempt to create an observer instance for a value,
+ * returns the new observer if successfully observed,
+ * or the existing observer if the value already has one.
+ */
+function observe (value, asRootData) {
+  if (!isObject(value) || value instanceof VNode) {
+    return
+  }
+  var ob;
+  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+    ob = value.__ob__;
+  } else if (
+    shouldObserve &&
+    !isServerRendering() &&
+    (Array.isArray(value) || isPlainObject(value)) &&
+    Object.isExtensible(value) &&
+    !value._isVue
+  ) {
+    ob = new Observer(value);
+  }
+  if (asRootData && ob) {
+    ob.vmCount++;
+  }
+  return ob
+}
+
+/**
+ * Define a reactive property on an Object.
+ */
+function defineReactive$$1 (
+  obj,
+  key,
+  val,
+  customSetter,
+  shallow
+) {
+  var dep = new Dep();
+
+  var property = Object.getOwnPropertyDescriptor(obj, key);
+  if (property && property.configurable === false) {
+    return
+  }
+
+  // cater for pre-defined getter/setters
+  var getter = property && property.get;
+  var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
+
+  var childOb = !shallow && observe(val);
+  Object.defineProperty(obj, key, {
+    enumerable: true,
+    configurable: true,
+    get: function reactiveGetter () {
+      var value = getter ? getter.call(obj) : val;
+      if (Dep.target) {
+        dep.depend();
+        if (childOb) {
+          childOb.dep.depend();
+          if (Array.isArray(value)) {
+            dependArray(value);
+          }
+        }
+      }
+      return value
+    },
+    set: function reactiveSetter (newVal) {
+      var value = getter ? getter.call(obj) : val;
+      /* eslint-disable no-self-compare */
+      if (newVal === value || (newVal !== newVal && value !== value)) {
+        return
+      }
+      /* eslint-enable no-self-compare */
+      if (customSetter) {
+        customSetter();
+      }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
+      if (setter) {
+        setter.call(obj, newVal);
+      } else {
+        val = newVal;
+      }
+      childOb = !shallow && observe(newVal);
+      dep.notify();
+    }
+  });
+}
+
+/**
+ * Set a property on an object. Adds the new property and
+ * triggers change notification if the property doesn't
+ * already exist.
+ */
+function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.length = Math.max(target.length, key);
+    target.splice(key, 1, val);
+    return val
+  }
+  if (key in target && !(key in Object.prototype)) {
+    target[key] = val;
+    return val
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid adding reactive properties to a Vue instance or its root $data ' +
+      'at runtime - declare it upfront in the data option.'
+    );
+    return val
+  }
+  if (!ob) {
+    target[key] = val;
+    return val
+  }
+  defineReactive$$1(ob.value, key, val);
+  ob.dep.notify();
+  return val
+}
+
+/**
+ * Delete a property and trigger change if necessary.
+ */
+function del (target, key) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
+  if (Array.isArray(target) && isValidArrayIndex(key)) {
+    target.splice(key, 1);
+    return
+  }
+  var ob = (target).__ob__;
+  if (target._isVue || (ob && ob.vmCount)) {
+    warn(
+      'Avoid deleting properties on a Vue instance or its root $data ' +
+      '- just set it to null.'
+    );
+    return
+  }
+  if (!hasOwn(target, key)) {
+    return
+  }
+  delete target[key];
+  if (!ob) {
+    return
+  }
+  ob.dep.notify();
+}
+
+/**
+ * Collect dependencies on array elements when the array is touched, since
+ * we cannot intercept array element access like property getters.
+ */
+function dependArray (value) {
+  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+    e = value[i];
+    e && e.__ob__ && e.__ob__.dep.depend();
+    if (Array.isArray(e)) {
+      dependArray(e);
+    }
+  }
+}
+
+/*  */
+
+/**
+ * Option overwriting strategies are functions that handle
+ * how to merge a parent option value and a child option
+ * value into the final value.
+ */
+var strats = config.optionMergeStrategies;
+
+/**
+ * Options with restrictions
+ */
+{
+  strats.el = strats.propsData = function (parent, child, vm, key) {
+    if (!vm) {
+      warn(
+        "option \"" + key + "\" can only be used during instance " +
+        'creation with the `new` keyword.'
+      );
+    }
+    return defaultStrat(parent, child)
+  };
+}
+
+/**
+ * Helper that recursively merges two data objects together.
+ */
+function mergeData (to, from) {
+  if (!from) { return to }
+  var key, toVal, fromVal;
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
+  for (var i = 0; i < keys.length; i++) {
+    key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
+    toVal = to[key];
+    fromVal = from[key];
+    if (!hasOwn(to, key)) {
+      set(to, key, fromVal);
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
+      mergeData(toVal, fromVal);
+    }
+  }
+  return to
+}
+
+/**
+ * Data
+ */
+function mergeDataOrFn (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    // in a Vue.extend merge, both should be functions
+    if (!childVal) {
+      return parentVal
+    }
+    if (!parentVal) {
+      return childVal
+    }
+    // when parentVal & childVal are both present,
+    // we need to return a function that returns the
+    // merged result of both functions... no need to
+    // check if parentVal is a function here because
+    // it has to be a function to pass previous merges.
+    return function mergedDataFn () {
+      return mergeData(
+        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+      )
+    }
+  } else {
+    return function mergedInstanceDataFn () {
+      // instance merge
+      var instanceData = typeof childVal === 'function'
+        ? childVal.call(vm, vm)
+        : childVal;
+      var defaultData = typeof parentVal === 'function'
+        ? parentVal.call(vm, vm)
+        : parentVal;
+      if (instanceData) {
+        return mergeData(instanceData, defaultData)
+      } else {
+        return defaultData
+      }
+    }
+  }
+}
+
+strats.data = function (
+  parentVal,
+  childVal,
+  vm
+) {
+  if (!vm) {
+    if (childVal && typeof childVal !== 'function') {
+      warn(
+        'The "data" option should be a function ' +
+        'that returns a per-instance value in component ' +
+        'definitions.',
+        vm
+      );
+
+      return parentVal
+    }
+    return mergeDataOrFn(parentVal, childVal)
+  }
+
+  return mergeDataOrFn(parentVal, childVal, vm)
+};
+
+/**
+ * Hooks and props are merged as arrays.
+ */
+function mergeHook (
+  parentVal,
+  childVal
+) {
+  var res = childVal
+    ? parentVal
+      ? parentVal.concat(childVal)
+      : Array.isArray(childVal)
+        ? childVal
+        : [childVal]
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
+}
+
+LIFECYCLE_HOOKS.forEach(function (hook) {
+  strats[hook] = mergeHook;
+});
+
+/**
+ * Assets
+ *
+ * When a vm is present (instance creation), we need to do
+ * a three-way merge between constructor options, instance
+ * options and parent options.
+ */
+function mergeAssets (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  var res = Object.create(parentVal || null);
+  if (childVal) {
+    assertObjectType(key, childVal, vm);
+    return extend(res, childVal)
+  } else {
+    return res
+  }
+}
+
+ASSET_TYPES.forEach(function (type) {
+  strats[type + 's'] = mergeAssets;
+});
+
+/**
+ * Watchers.
+ *
+ * Watchers hashes should not overwrite one
+ * another, so we merge them as arrays.
+ */
+strats.watch = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  // work around Firefox's Object.prototype.watch...
+  if (parentVal === nativeWatch) { parentVal = undefined; }
+  if (childVal === nativeWatch) { childVal = undefined; }
+  /* istanbul ignore if */
+  if (!childVal) { return Object.create(parentVal || null) }
+  {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = {};
+  extend(ret, parentVal);
+  for (var key$1 in childVal) {
+    var parent = ret[key$1];
+    var child = childVal[key$1];
+    if (parent && !Array.isArray(parent)) {
+      parent = [parent];
+    }
+    ret[key$1] = parent
+      ? parent.concat(child)
+      : Array.isArray(child) ? child : [child];
+  }
+  return ret
+};
+
+/**
+ * Other object hashes.
+ */
+strats.props =
+strats.methods =
+strats.inject =
+strats.computed = function (
+  parentVal,
+  childVal,
+  vm,
+  key
+) {
+  if (childVal && "development" !== 'production') {
+    assertObjectType(key, childVal, vm);
+  }
+  if (!parentVal) { return childVal }
+  var ret = Object.create(null);
+  extend(ret, parentVal);
+  if (childVal) { extend(ret, childVal); }
+  return ret
+};
+strats.provide = mergeDataOrFn;
+
+/**
+ * Default strategy.
+ */
+var defaultStrat = function (parentVal, childVal) {
+  return childVal === undefined
+    ? parentVal
+    : childVal
+};
+
+/**
+ * Validate component names
+ */
+function checkComponents (options) {
+  for (var key in options.components) {
+    validateComponentName(key);
+  }
+}
+
+function validateComponentName (name) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+    warn(
+      'Invalid component name: "' + name + '". Component names ' +
+      'should conform to valid custom element name in html5 specification.'
+    );
+  }
+  if (isBuiltInTag(name) || config.isReservedTag(name)) {
+    warn(
+      'Do not use built-in or reserved HTML elements as component ' +
+      'id: ' + name
+    );
+  }
+}
+
+/**
+ * Ensure all props option syntax are normalized into the
+ * Object-based format.
+ */
+function normalizeProps (options, vm) {
+  var props = options.props;
+  if (!props) { return }
+  var res = {};
+  var i, val, name;
+  if (Array.isArray(props)) {
+    i = props.length;
+    while (i--) {
+      val = props[i];
+      if (typeof val === 'string') {
+        name = camelize(val);
+        res[name] = { type: null };
+      } else {
+        warn('props must be strings when using array syntax.');
+      }
+    }
+  } else if (isPlainObject(props)) {
+    for (var key in props) {
+      val = props[key];
+      name = camelize(key);
+      res[name] = isPlainObject(val)
+        ? val
+        : { type: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"props\": expected an Array or an Object, " +
+      "but got " + (toRawType(props)) + ".",
+      vm
+    );
+  }
+  options.props = res;
+}
+
+/**
+ * Normalize all injections into Object-based format
+ */
+function normalizeInject (options, vm) {
+  var inject = options.inject;
+  if (!inject) { return }
+  var normalized = options.inject = {};
+  if (Array.isArray(inject)) {
+    for (var i = 0; i < inject.length; i++) {
+      normalized[inject[i]] = { from: inject[i] };
+    }
+  } else if (isPlainObject(inject)) {
+    for (var key in inject) {
+      var val = inject[key];
+      normalized[key] = isPlainObject(val)
+        ? extend({ from: key }, val)
+        : { from: val };
+    }
+  } else {
+    warn(
+      "Invalid value for option \"inject\": expected an Array or an Object, " +
+      "but got " + (toRawType(inject)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Normalize raw function directives into object format.
+ */
+function normalizeDirectives (options) {
+  var dirs = options.directives;
+  if (dirs) {
+    for (var key in dirs) {
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
+      }
+    }
+  }
+}
+
+function assertObjectType (name, value, vm) {
+  if (!isPlainObject(value)) {
+    warn(
+      "Invalid value for option \"" + name + "\": expected an Object, " +
+      "but got " + (toRawType(value)) + ".",
+      vm
+    );
+  }
+}
+
+/**
+ * Merge two option objects into a new one.
+ * Core utility used in both instantiation and inheritance.
+ */
+function mergeOptions (
+  parent,
+  child,
+  vm
+) {
+  {
+    checkComponents(child);
+  }
+
+  if (typeof child === 'function') {
+    child = child.options;
+  }
+
+  normalizeProps(child, vm);
+  normalizeInject(child, vm);
+  normalizeDirectives(child);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
+    }
+  }
+
+  var options = {};
+  var key;
+  for (key in parent) {
+    mergeField(key);
+  }
+  for (key in child) {
+    if (!hasOwn(parent, key)) {
+      mergeField(key);
+    }
+  }
+  function mergeField (key) {
+    var strat = strats[key] || defaultStrat;
+    options[key] = strat(parent[key], child[key], vm, key);
+  }
+  return options
+}
+
+/**
+ * Resolve an asset.
+ * This function is used because child instances need access
+ * to assets defined in its ancestor chain.
+ */
+function resolveAsset (
+  options,
+  type,
+  id,
+  warnMissing
+) {
+  /* istanbul ignore if */
+  if (typeof id !== 'string') {
+    return
+  }
+  var assets = options[type];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+  if (warnMissing && !res) {
+    warn(
+      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+      options
+    );
+  }
+  return res
+}
+
+/*  */
+
+
+
+function validateProp (
+  key,
+  propOptions,
+  propsData,
+  vm
+) {
+  var prop = propOptions[key];
+  var absent = !hasOwn(propsData, key);
+  var value = propsData[key];
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
+    if (absent && !hasOwn(prop, 'default')) {
+      value = false;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
+    }
+  }
+  // check default value
+  if (value === undefined) {
+    value = getPropDefaultValue(vm, prop, key);
+    // since the default value is a fresh copy,
+    // make sure to observe it.
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
+    observe(value);
+    toggleObserving(prevShouldObserve);
+  }
+  {
+    assertProp(prop, key, value, vm, absent);
+  }
+  return value
+}
+
+/**
+ * Get the default value of a prop.
+ */
+function getPropDefaultValue (vm, prop, key) {
+  // no default, return undefined
+  if (!hasOwn(prop, 'default')) {
+    return undefined
+  }
+  var def = prop.default;
+  // warn against non-factory defaults for Object & Array
+  if (isObject(def)) {
+    warn(
+      'Invalid default value for prop "' + key + '": ' +
+      'Props with type Object/Array must use a factory function ' +
+      'to return the default value.',
+      vm
+    );
+  }
+  // the raw prop value was also undefined from previous render,
+  // return previous default value to avoid unnecessary watcher trigger
+  if (vm && vm.$options.propsData &&
+    vm.$options.propsData[key] === undefined &&
+    vm._props[key] !== undefined
+  ) {
+    return vm._props[key]
+  }
+  // call factory function for non-Function types
+  // a value is Function if its prototype is function even across different execution context
+  return typeof def === 'function' && getType(prop.type) !== 'Function'
+    ? def.call(vm)
+    : def
+}
+
+/**
+ * Assert whether a prop is valid.
+ */
+function assertProp (
+  prop,
+  name,
+  value,
+  vm,
+  absent
+) {
+  if (prop.required && absent) {
+    warn(
+      'Missing required prop: "' + name + '"',
+      vm
+    );
+    return
+  }
+  if (value == null && !prop.required) {
+    return
+  }
+  var type = prop.type;
+  var valid = !type || type === true;
+  var expectedTypes = [];
+  if (type) {
+    if (!Array.isArray(type)) {
+      type = [type];
+    }
+    for (var i = 0; i < type.length && !valid; i++) {
+      var assertedType = assertType(value, type[i], vm);
+      expectedTypes.push(assertedType.expectedType || '');
+      valid = assertedType.valid;
+    }
+  }
+
+  var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+  if (!valid && haveExpectedTypes) {
+    warn(
+      getInvalidTypeMessage(name, value, expectedTypes),
+      vm
+    );
+    return
+  }
+  var validator = prop.validator;
+  if (validator) {
+    if (!validator(value)) {
+      warn(
+        'Invalid prop: custom validator check failed for prop "' + name + '".',
+        vm
+      );
+    }
+  }
+}
+
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+function assertType (value, type, vm) {
+  var valid;
+  var expectedType = getType(type);
+  if (simpleCheckRE.test(expectedType)) {
+    var t = typeof value;
+    valid = t === expectedType.toLowerCase();
+    // for primitive wrapper objects
+    if (!valid && t === 'object') {
+      valid = value instanceof type;
+    }
+  } else if (expectedType === 'Object') {
+    valid = isPlainObject(value);
+  } else if (expectedType === 'Array') {
+    valid = Array.isArray(value);
+  } else {
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
+  }
+  return {
+    valid: valid,
+    expectedType: expectedType
+  }
+}
+
+var functionTypeCheckRE = /^\s*function (\w+)/;
+
+/**
+ * Use function string name to check built-in types,
+ * because a simple equality check will fail when running
+ * across different vms / iframes.
+ */
+function getType (fn) {
+  var match = fn && fn.toString().match(functionTypeCheckRE);
+  return match ? match[1] : ''
+}
+
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
+  }
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
+    }
+  }
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += " with value " + (styleValue(value, expectedType));
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + (styleValue(value, receivedType)) + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+}
+
+/*  */
+
+function handleError (err, vm, info) {
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
+          }
+        }
+      }
+    }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
+  }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
+  if (config.errorHandler) {
+    try {
+      return config.errorHandler.call(null, err, vm, info)
+    } catch (e) {
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
+    }
+  }
+  logError(err, vm, info);
+}
+
+function logError (err, vm, info) {
+  {
+    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+  }
+  /* istanbul ignore else */
+  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+    console.error(err);
+  } else {
+    throw err
+  }
+}
+
+/*  */
+
+var isUsingMicroTask = false;
+
+var callbacks = [];
+var pending = false;
+
+function flushCallbacks () {
+  pending = false;
+  var copies = callbacks.slice(0);
+  callbacks.length = 0;
+  for (var i = 0; i < copies.length; i++) {
+    copies[i]();
+  }
+}
+
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
+/* istanbul ignore next, $flow-disable-line */
+if (typeof Promise !== 'undefined' && isNative(Promise)) {
+  var p = Promise.resolve();
+  timerFunc = function () {
+    p.then(flushCallbacks);
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
+    // it can get stuck in a weird state where callbacks are pushed into the
+    // microtask queue but the queue isn't being flushed, until the browser
+    // needs to do some other work, e.g. handle a timer. Therefore we can
+    // "force" the microtask queue to be flushed by adding an empty timer.
+    if (isIOS) { setTimeout(noop); }
+  };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
+} else {
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
+}
+
+function nextTick (cb, ctx) {
+  var _resolve;
+  callbacks.push(function () {
+    if (cb) {
+      try {
+        cb.call(ctx);
+      } catch (e) {
+        handleError(e, ctx, 'nextTick');
+      }
+    } else if (_resolve) {
+      _resolve(ctx);
+    }
+  });
+  if (!pending) {
+    pending = true;
+    timerFunc();
+  }
+  // $flow-disable-line
+  if (!cb && typeof Promise !== 'undefined') {
+    return new Promise(function (resolve) {
+      _resolve = resolve;
+    })
+  }
+}
+
+/*  */
+
+/* not type checking this file because flow doesn't play well with Proxy */
+
+var initProxy;
+
+{
+  var allowedGlobals = makeMap(
+    'Infinity,undefined,NaN,isFinite,isNaN,' +
+    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+    'require' // for Webpack/Browserify
+  );
+
+  var warnNonPresent = function (target, key) {
+    warn(
+      "Property or method \"" + key + "\" is not defined on the instance but " +
+      'referenced during render. Make sure that this property is reactive, ' +
+      'either in the data option, or for class-based components, by ' +
+      'initializing the property. ' +
+      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
+  var hasProxy =
+    typeof Proxy !== 'undefined' && isNative(Proxy);
+
+  if (hasProxy) {
+    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+    config.keyCodes = new Proxy(config.keyCodes, {
+      set: function set (target, key, value) {
+        if (isBuiltInModifier(key)) {
+          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+          return false
+        } else {
+          target[key] = value;
+          return true
+        }
+      }
+    });
+  }
+
+  var hasHandler = {
+    has: function has (target, key) {
+      var has = key in target;
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+      if (!has && !isAllowed) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return has || !isAllowed
+    }
+  };
+
+  var getHandler = {
+    get: function get (target, key) {
+      if (typeof key === 'string' && !(key in target)) {
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
+      }
+      return target[key]
+    }
+  };
+
+  initProxy = function initProxy (vm) {
+    if (hasProxy) {
+      // determine which proxy handler to use
+      var options = vm.$options;
+      var handlers = options.render && options.render._withStripped
+        ? getHandler
+        : hasHandler;
+      vm._renderProxy = new Proxy(vm, handlers);
+    } else {
+      vm._renderProxy = vm;
+    }
+  };
+}
+
+/*  */
+
+var seenObjects = new _Set();
+
+/**
+ * Recursively traverse an object to evoke all converted
+ * getters, so that every nested property inside the object
+ * is collected as a "deep" dependency.
+ */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
+
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+var mark;
+var measure;
+
+{
+  var perf = inBrowser && window.performance;
+  /* istanbul ignore if */
+  if (
+    perf &&
+    perf.mark &&
+    perf.measure &&
+    perf.clearMarks &&
+    perf.clearMeasures
+  ) {
+    mark = function (tag) { return perf.mark(tag); };
+    measure = function (name, startTag, endTag) {
+      perf.measure(name, startTag, endTag);
+      perf.clearMarks(startTag);
+      perf.clearMarks(endTag);
+      // perf.clearMeasures(name)
+    };
+  }
+}
+
+/*  */
+
+var normalizeEvent = cached(function (name) {
+  var passive = name.charAt(0) === '&';
+  name = passive ? name.slice(1) : name;
+  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+  name = once$$1 ? name.slice(1) : name;
+  var capture = name.charAt(0) === '!';
+  name = capture ? name.slice(1) : name;
+  return {
+    name: name,
+    once: once$$1,
+    capture: capture,
+    passive: passive
+  }
+});
+
+function createFnInvoker (fns, vm) {
+  function invoker () {
+    var arguments$1 = arguments;
+
+    var fns = invoker.fns;
+    if (Array.isArray(fns)) {
+      var cloned = fns.slice();
+      for (var i = 0; i < cloned.length; i++) {
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+      }
+    } else {
+      // return handler return value for single handlers
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+    }
+  }
+  invoker.fns = fns;
+  return invoker
+}
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  createOnceHandler,
+  vm
+) {
+  var name, def$$1, cur, old, event;
+  for (name in on) {
+    def$$1 = cur = on[name];
+    old = oldOn[name];
+    event = normalizeEvent(name);
+    if (isUndef(cur)) {
+      warn(
+        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+        vm
+      );
+    } else if (isUndef(old)) {
+      if (isUndef(cur.fns)) {
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
+    } else if (cur !== old) {
+      old.fns = cur;
+      on[name] = old;
+    }
+  }
+  for (name in oldOn) {
+    if (isUndef(on[name])) {
+      event = normalizeEvent(name);
+      remove$$1(event.name, oldOn[name], event.capture);
+    }
+  }
+}
+
+/*  */
+
+function mergeVNodeHook (def, hookKey, hook) {
+  if (def instanceof VNode) {
+    def = def.data.hook || (def.data.hook = {});
+  }
+  var invoker;
+  var oldHook = def[hookKey];
+
+  function wrappedHook () {
+    hook.apply(this, arguments);
+    // important: remove merged hook to ensure it's called only once
+    // and prevent memory leak
+    remove(invoker.fns, wrappedHook);
+  }
+
+  if (isUndef(oldHook)) {
+    // no existing hook
+    invoker = createFnInvoker([wrappedHook]);
+  } else {
+    /* istanbul ignore if */
+    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+      // already a merged invoker
+      invoker = oldHook;
+      invoker.fns.push(wrappedHook);
+    } else {
+      // existing plain hook
+      invoker = createFnInvoker([oldHook, wrappedHook]);
+    }
+  }
+
+  invoker.merged = true;
+  def[hookKey] = invoker;
+}
+
+/*  */
+
+function extractPropsFromVNodeData (
+  data,
+  Ctor,
+  tag
+) {
+  // we are only extracting raw values here.
+  // validation and default values are handled in the child
+  // component itself.
+  var propOptions = Ctor.options.props;
+  if (isUndef(propOptions)) {
+    return
+  }
+  var res = {};
+  var attrs = data.attrs;
+  var props = data.props;
+  if (isDef(attrs) || isDef(props)) {
+    for (var key in propOptions) {
+      var altKey = hyphenate(key);
+      {
+        var keyInLowerCase = key.toLowerCase();
+        if (
+          key !== keyInLowerCase &&
+          attrs && hasOwn(attrs, keyInLowerCase)
+        ) {
+          tip(
+            "Prop \"" + keyInLowerCase + "\" is passed to component " +
+            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+            " \"" + key + "\". " +
+            "Note that HTML attributes are case-insensitive and camelCased " +
+            "props need to use their kebab-case equivalents when using in-DOM " +
+            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+          );
+        }
+      }
+      checkProp(res, props, key, altKey, true) ||
+      checkProp(res, attrs, key, altKey, false);
+    }
+  }
+  return res
+}
+
+function checkProp (
+  res,
+  hash,
+  key,
+  altKey,
+  preserve
+) {
+  if (isDef(hash)) {
+    if (hasOwn(hash, key)) {
+      res[key] = hash[key];
+      if (!preserve) {
+        delete hash[key];
+      }
+      return true
+    } else if (hasOwn(hash, altKey)) {
+      res[key] = hash[altKey];
+      if (!preserve) {
+        delete hash[altKey];
+      }
+      return true
+    }
+  }
+  return false
+}
+
+/*  */
+
+// The template compiler attempts to minimize the need for normalization by
+// statically analyzing the template at compile time.
+//
+// For plain HTML markup, normalization can be completely skipped because the
+// generated render function is guaranteed to return Array<VNode>. There are
+// two cases where extra normalization is needed:
+
+// 1. When the children contains components - because a functional component
+// may return an Array instead of a single root. In this case, just a simple
+// normalization is needed - if any child is an Array, we flatten the whole
+// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+// because functional components already normalize their own children.
+function simpleNormalizeChildren (children) {
+  for (var i = 0; i < children.length; i++) {
+    if (Array.isArray(children[i])) {
+      return Array.prototype.concat.apply([], children)
+    }
+  }
+  return children
+}
+
+// 2. When the children contains constructs that always generated nested Arrays,
+// e.g. <template>, <slot>, v-for, or when the children is provided by user
+// with hand-written render functions / JSX. In such cases a full normalization
+// is needed to cater to all possible types of children values.
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function isTextNode (node) {
+  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, lastIndex, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (isUndef(c) || typeof c === 'boolean') { continue }
+    lastIndex = res.length - 1;
+    last = res[lastIndex];
+    //  nested
+    if (Array.isArray(c)) {
+      if (c.length > 0) {
+        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+        // merge adjacent text nodes
+        if (isTextNode(c[0]) && isTextNode(last)) {
+          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+          c.shift();
+        }
+        res.push.apply(res, c);
+      }
+    } else if (isPrimitive(c)) {
+      if (isTextNode(last)) {
+        // merge adjacent text nodes
+        // this is necessary for SSR hydration because text nodes are
+        // essentially merged when rendered to HTML strings
+        res[lastIndex] = createTextVNode(last.text + c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (isTextNode(c) && isTextNode(last)) {
+        // merge adjacent text nodes
+        res[lastIndex] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (isTrue(children._isVList) &&
+          isDef(c.tag) &&
+          isUndef(c.key) &&
+          isDef(nestedIndex)) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
+  }
+}
+
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      }
+    });
+    toggleObserving(true);
+  }
+}
+
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
+
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
+  }
+}
+
+/*  */
+
+
+
+/**
+ * Runtime helper for resolving raw children VNodes into a slot object.
+ */
+function resolveSlots (
+  children,
+  context
+) {
+  if (!children || !children.length) {
+    return {}
+  }
+  var slots = {};
+  for (var i = 0, l = children.length; i < l; i++) {
+    var child = children[i];
+    var data = child.data;
+    // remove slot attribute if the node is resolved as a Vue slot node
+    if (data && data.attrs && data.attrs.slot) {
+      delete data.attrs.slot;
+    }
+    // named slots should only be respected if the vnode was rendered in the
+    // same context.
+    if ((child.context === context || child.fnContext === context) &&
+      data && data.slot != null
+    ) {
+      var name = data.slot;
+      var slot = (slots[name] || (slots[name] = []));
+      if (child.tag === 'template') {
+        slot.push.apply(slot, child.children || []);
+      } else {
+        slot.push(child);
+      }
+    } else {
+      (slots.default || (slots.default = [])).push(child);
+    }
+  }
+  // ignore slots that contains only whitespace
+  for (var name$1 in slots) {
+    if (slots[name$1].every(isWhitespace)) {
+      delete slots[name$1];
+    }
+  }
+  return slots
+}
+
+function isWhitespace (node) {
+  return (node.isComment && !node.asyncFactory) || node.text === ' '
+}
+
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    var vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  } else {
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  }
+
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
+
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+  return eventKeyCode === undefined
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
+    }
+  }
+  return data
+}
+
+/*  */
+
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
+
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
+
+/*  */
+
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
+
+/*  */
+
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
+    }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
+};
+
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
+  }
+}
+
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
+  }
+}
+
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
+  {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  }
+}
+
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
+    }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
+  };
+}
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
+      }
+    }
+  }
+}
+
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
+  }
+}
+
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
+
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
+
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
+}
+
+/*  */
+
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
+  }
+}
+
+function initLifecycle (vm) {
+  var options = vm.$options;
+
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
+  }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
+}
+
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
+
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
+
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
+  }
+  callHook(vm, 'beforeMount');
+
+  var updateComponent;
+  /* istanbul ignore if */
+  if (config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
+  } else {
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
+  }
+
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
+
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
+) {
+  {
+    isUpdatingChildComponent = true;
+  }
+
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
+
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
+  }
+
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
+
+  {
+    isUpdatingChildComponent = false;
+  }
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
+  }
+  return false
+}
+
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
+}
+
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
+
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
+
+/*  */
+
+var MAX_UPDATE_COUNT = 100;
+
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
+
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  {
+    circular = {};
+  }
+  waiting = flushing = false;
+}
+
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
+  }
+}
+
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
+
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
+  }
+
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
+
+  resetSchedulerState();
+
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
+
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
+}
+
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
+  }
+}
+
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
+
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
+
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
+
+      if (!config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
+
+/*  */
+
+
+
+var uid$2 = 0;
+
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = expOrFn.toString();
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
+      );
+    }
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
+
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
+
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
+    }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
+    }
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
+
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        var info = "callback for watcher \"" + (this.expression) + "\"";
+        invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
+  }
+};
+
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
+
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
+
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
+    }
+    this.active = false;
+  }
+};
+
+/*  */
+
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
+
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
+}
+
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
+}
+
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
+  }
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
+  }
+  // observe data
+  observe(data, true /* asRootData */);
+}
+
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
+  }
+}
+
+var computedWatcherOptions = { lazy: true };
+
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
+
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
+
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+      }
+    }
+  }
+}
+
+function defineComputed (
+  target,
+  key,
+  userDef
+) {
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
+  }
+  if (sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
+      warn(
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
+      );
+    };
+  }
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
+  }
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
+    }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+  }
+}
+
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
+
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
+}
+
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
+
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
+
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
+    var vm = this;
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
+    }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+      pushTarget();
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+      popTarget();
+    }
+    return function unwatchFn () {
+      watcher.teardown();
+    }
+  };
+}
+
+/*  */
+
+var uid$3 = 0;
+
+function initMixin (Vue) {
+  Vue.prototype._init = function (options) {
+    var vm = this;
+    // a uid
+    vm._uid = uid$3++;
+
+    var startTag, endTag;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      startTag = "vue-perf-start:" + (vm._uid);
+      endTag = "vue-perf-end:" + (vm._uid);
+      mark(startTag);
+    }
+
+    // a flag to avoid this being observed
+    vm._isVue = true;
+    // merge options
+    if (options && options._isComponent) {
+      // optimize internal component instantiation
+      // since dynamic options merging is pretty slow, and none of the
+      // internal component options needs special treatment.
+      initInternalComponent(vm, options);
+    } else {
+      vm.$options = mergeOptions(
+        resolveConstructorOptions(vm.constructor),
+        options || {},
+        vm
+      );
+    }
+    /* istanbul ignore else */
+    {
+      initProxy(vm);
+    }
+    // expose real self
+    vm._self = vm;
+    initLifecycle(vm);
+    initEvents(vm);
+    initRender(vm);
+    callHook(vm, 'beforeCreate');
+    initInjections(vm); // resolve injections before data/props
+    initState(vm);
+    initProvide(vm); // resolve provide after data/props
+    callHook(vm, 'created');
+
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      vm._name = formatComponentName(vm, false);
+      mark(endTag);
+      measure(("vue " + (vm._name) + " init"), startTag, endTag);
+    }
+
+    if (vm.$options.el) {
+      vm.$mount(vm.$options.el);
+    }
+  };
+}
+
+function initInternalComponent (vm, options) {
+  var opts = vm.$options = Object.create(vm.constructor.options);
+  // doing this because it's faster than dynamic enumeration.
+  var parentVnode = options._parentVnode;
+  opts.parent = options.parent;
+  opts._parentVnode = parentVnode;
+
+  var vnodeComponentOptions = parentVnode.componentOptions;
+  opts.propsData = vnodeComponentOptions.propsData;
+  opts._parentListeners = vnodeComponentOptions.listeners;
+  opts._renderChildren = vnodeComponentOptions.children;
+  opts._componentTag = vnodeComponentOptions.tag;
+
+  if (options.render) {
+    opts.render = options.render;
+    opts.staticRenderFns = options.staticRenderFns;
+  }
+}
+
+function resolveConstructorOptions (Ctor) {
+  var options = Ctor.options;
+  if (Ctor.super) {
+    var superOptions = resolveConstructorOptions(Ctor.super);
+    var cachedSuperOptions = Ctor.superOptions;
+    if (superOptions !== cachedSuperOptions) {
+      // super option changed,
+      // need to resolve new options.
+      Ctor.superOptions = superOptions;
+      // check if there are any late-modified/attached options (#4976)
+      var modifiedOptions = resolveModifiedOptions(Ctor);
+      // update base extend options
+      if (modifiedOptions) {
+        extend(Ctor.extendOptions, modifiedOptions);
+      }
+      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+      if (options.name) {
+        options.components[options.name] = Ctor;
+      }
+    }
+  }
+  return options
+}
+
+function resolveModifiedOptions (Ctor) {
+  var modified;
+  var latest = Ctor.options;
+  var sealed = Ctor.sealedOptions;
+  for (var key in latest) {
+    if (latest[key] !== sealed[key]) {
+      if (!modified) { modified = {}; }
+      modified[key] = latest[key];
+    }
+  }
+  return modified
+}
+
+function Vue (options) {
+  if (!(this instanceof Vue)
+  ) {
+    warn('Vue is a constructor and should be called with the `new` keyword');
+  }
+  this._init(options);
+}
+
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
+
+/*  */
+
+function initUse (Vue) {
+  Vue.use = function (plugin) {
+    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+    if (installedPlugins.indexOf(plugin) > -1) {
+      return this
+    }
+
+    // additional parameters
+    var args = toArray(arguments, 1);
+    args.unshift(this);
+    if (typeof plugin.install === 'function') {
+      plugin.install.apply(plugin, args);
+    } else if (typeof plugin === 'function') {
+      plugin.apply(null, args);
+    }
+    installedPlugins.push(plugin);
+    return this
+  };
+}
+
+/*  */
+
+function initMixin$1 (Vue) {
+  Vue.mixin = function (mixin) {
+    this.options = mergeOptions(this.options, mixin);
+    return this
+  };
+}
+
+/*  */
+
+function initExtend (Vue) {
+  /**
+   * Each instance constructor, including Vue, has a unique
+   * cid. This enables us to create wrapped "child
+   * constructors" for prototypal inheritance and cache them.
+   */
+  Vue.cid = 0;
+  var cid = 1;
+
+  /**
+   * Class inheritance
+   */
+  Vue.extend = function (extendOptions) {
+    extendOptions = extendOptions || {};
+    var Super = this;
+    var SuperId = Super.cid;
+    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+    if (cachedCtors[SuperId]) {
+      return cachedCtors[SuperId]
+    }
+
+    var name = extendOptions.name || Super.options.name;
+    if (name) {
+      validateComponentName(name);
+    }
+
+    var Sub = function VueComponent (options) {
+      this._init(options);
+    };
+    Sub.prototype = Object.create(Super.prototype);
+    Sub.prototype.constructor = Sub;
+    Sub.cid = cid++;
+    Sub.options = mergeOptions(
+      Super.options,
+      extendOptions
+    );
+    Sub['super'] = Super;
+
+    // For props and computed properties, we define the proxy getters on
+    // the Vue instances at extension time, on the extended prototype. This
+    // avoids Object.defineProperty calls for each instance created.
+    if (Sub.options.props) {
+      initProps$1(Sub);
+    }
+    if (Sub.options.computed) {
+      initComputed$1(Sub);
+    }
+
+    // allow further extension/mixin/plugin usage
+    Sub.extend = Super.extend;
+    Sub.mixin = Super.mixin;
+    Sub.use = Super.use;
+
+    // create asset registers, so extended classes
+    // can have their private assets too.
+    ASSET_TYPES.forEach(function (type) {
+      Sub[type] = Super[type];
+    });
+    // enable recursive self-lookup
+    if (name) {
+      Sub.options.components[name] = Sub;
+    }
+
+    // keep a reference to the super options at extension time.
+    // later at instantiation we can check if Super's options have
+    // been updated.
+    Sub.superOptions = Super.options;
+    Sub.extendOptions = extendOptions;
+    Sub.sealedOptions = extend({}, Sub.options);
+
+    // cache constructor
+    cachedCtors[SuperId] = Sub;
+    return Sub
+  };
+}
+
+function initProps$1 (Comp) {
+  var props = Comp.options.props;
+  for (var key in props) {
+    proxy(Comp.prototype, "_props", key);
+  }
+}
+
+function initComputed$1 (Comp) {
+  var computed = Comp.options.computed;
+  for (var key in computed) {
+    defineComputed(Comp.prototype, key, computed[key]);
+  }
+}
+
+/*  */
+
+function initAssetRegisters (Vue) {
+  /**
+   * Create asset registration methods.
+   */
+  ASSET_TYPES.forEach(function (type) {
+    Vue[type] = function (
+      id,
+      definition
+    ) {
+      if (!definition) {
+        return this.options[type + 's'][id]
+      } else {
+        /* istanbul ignore if */
+        if (type === 'component') {
+          validateComponentName(id);
+        }
+        if (type === 'component' && isPlainObject(definition)) {
+          definition.name = definition.name || id;
+          definition = this.options._base.extend(definition);
+        }
+        if (type === 'directive' && typeof definition === 'function') {
+          definition = { bind: definition, update: definition };
+        }
+        this.options[type + 's'][id] = definition;
+        return definition
+      }
+    };
+  });
+}
+
+/*  */
+
+
+
+
+
+function getComponentName (opts) {
+  return opts && (opts.Ctor.options.name || opts.tag)
+}
+
+function matches (pattern, name) {
+  if (Array.isArray(pattern)) {
+    return pattern.indexOf(name) > -1
+  } else if (typeof pattern === 'string') {
+    return pattern.split(',').indexOf(name) > -1
+  } else if (isRegExp(pattern)) {
+    return pattern.test(name)
+  }
+  /* istanbul ignore next */
+  return false
+}
+
+function pruneCache (keepAliveInstance, filter) {
+  var cache = keepAliveInstance.cache;
+  var keys = keepAliveInstance.keys;
+  var _vnode = keepAliveInstance._vnode;
+  for (var key in cache) {
+    var entry = cache[key];
+    if (entry) {
+      var name = entry.name;
+      if (name && !filter(name)) {
+        pruneCacheEntry(cache, key, keys, _vnode);
+      }
+    }
+  }
+}
+
+function pruneCacheEntry (
+  cache,
+  key,
+  keys,
+  current
+) {
+  var entry = cache[key];
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy();
+  }
+  cache[key] = null;
+  remove(keys, key);
+}
+
+var patternTypes = [String, RegExp, Array];
+
+var KeepAlive = {
+  name: 'keep-alive',
+  abstract: true,
+
+  props: {
+    include: patternTypes,
+    exclude: patternTypes,
+    max: [String, Number]
+  },
+
+  methods: {
+    cacheVNode: function cacheVNode() {
+      var ref = this;
+      var cache = ref.cache;
+      var keys = ref.keys;
+      var vnodeToCache = ref.vnodeToCache;
+      var keyToCache = ref.keyToCache;
+      if (vnodeToCache) {
+        var tag = vnodeToCache.tag;
+        var componentInstance = vnodeToCache.componentInstance;
+        var componentOptions = vnodeToCache.componentOptions;
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag: tag,
+          componentInstance: componentInstance,
+        };
+        keys.push(keyToCache);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+        this.vnodeToCache = null;
+      }
+    }
+  },
+
+  created: function created () {
+    this.cache = Object.create(null);
+    this.keys = [];
+  },
+
+  destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.cacheVNode();
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
+  },
+
+  updated: function updated () {
+    this.cacheVNode();
+  },
+
+  render: function render () {
+    var slot = this.$slots.default;
+    var vnode = getFirstComponentChild(slot);
+    var componentOptions = vnode && vnode.componentOptions;
+    if (componentOptions) {
+      // check pattern
+      var name = getComponentName(componentOptions);
+      var ref = this;
+      var include = ref.include;
+      var exclude = ref.exclude;
+      if (
+        // not included
+        (include && (!name || !matches(include, name))) ||
+        // excluded
+        (exclude && name && matches(exclude, name))
+      ) {
+        return vnode
+      }
+
+      var ref$1 = this;
+      var cache = ref$1.cache;
+      var keys = ref$1.keys;
+      var key = vnode.key == null
+        // same constructor may get registered as different local components
+        // so cid alone is not enough (#3269)
+        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+        : vnode.key;
+      if (cache[key]) {
+        vnode.componentInstance = cache[key].componentInstance;
+        // make current key freshest
+        remove(keys, key);
+        keys.push(key);
+      } else {
+        // delay setting the cache until update
+        this.vnodeToCache = vnode;
+        this.keyToCache = key;
+      }
+
+      vnode.data.keepAlive = true;
+    }
+    return vnode || (slot && slot[0])
+  }
+};
+
+var builtInComponents = {
+  KeepAlive: KeepAlive
+};
+
+/*  */
+
+function initGlobalAPI (Vue) {
+  // config
+  var configDef = {};
+  configDef.get = function () { return config; };
+  {
+    configDef.set = function () {
+      warn(
+        'Do not replace the Vue.config object, set individual fields instead.'
+      );
+    };
+  }
+  Object.defineProperty(Vue, 'config', configDef);
+
+  // exposed util methods.
+  // NOTE: these are not considered part of the public API - avoid relying on
+  // them unless you are aware of the risk.
+  Vue.util = {
+    warn: warn,
+    extend: extend,
+    mergeOptions: mergeOptions,
+    defineReactive: defineReactive$$1
+  };
+
+  Vue.set = set;
+  Vue.delete = del;
+  Vue.nextTick = nextTick;
+
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
+  Vue.options = Object.create(null);
+  ASSET_TYPES.forEach(function (type) {
+    Vue.options[type + 's'] = Object.create(null);
+  });
+
+  // this is used to identify the "base" constructor to extend all plain-object
+  // components with in Weex's multi-instance scenarios.
+  Vue.options._base = Vue;
+
+  extend(Vue.options.components, builtInComponents);
+
+  initUse(Vue);
+  initMixin$1(Vue);
+  initExtend(Vue);
+  initAssetRegisters(Vue);
+}
+
+initGlobalAPI(Vue);
+
+Object.defineProperty(Vue.prototype, '$isServer', {
+  get: isServerRendering
+});
+
+Object.defineProperty(Vue.prototype, '$ssrContext', {
+  get: function get () {
+    /* istanbul ignore next */
+    return this.$vnode && this.$vnode.ssrContext
+  }
+});
+
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.14';
+
+/*  */
+
+// these are reserved for web because they are directly compiled away
+// during template compilation
+var isReservedAttr = makeMap('style,class');
+
+// attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select,progress');
+var mustUseProp = function (tag, type, attr) {
+  return (
+    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+    (attr === 'selected' && tag === 'option') ||
+    (attr === 'checked' && tag === 'input') ||
+    (attr === 'muted' && tag === 'video')
+  )
+};
+
+var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
+var isBooleanAttr = makeMap(
+  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
+  'truespeed,typemustmatch,visible'
+);
+
+var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+var isXlink = function (name) {
+  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+};
+
+var getXlinkProp = function (name) {
+  return isXlink(name) ? name.slice(6, name.length) : ''
+};
+
+var isFalsyAttrValue = function (val) {
+  return val == null || val === false
+};
+
+/*  */
+
+function genClassForVnode (vnode) {
+  var data = vnode.data;
+  var parentNode = vnode;
+  var childNode = vnode;
+  while (isDef(childNode.componentInstance)) {
+    childNode = childNode.componentInstance._vnode;
+    if (childNode && childNode.data) {
+      data = mergeClassData(childNode.data, data);
+    }
+  }
+  while (isDef(parentNode = parentNode.parent)) {
+    if (parentNode && parentNode.data) {
+      data = mergeClassData(data, parentNode.data);
+    }
+  }
+  return renderClass(data.staticClass, data.class)
+}
+
+function mergeClassData (child, parent) {
+  return {
+    staticClass: concat(child.staticClass, parent.staticClass),
+    class: isDef(child.class)
+      ? [child.class, parent.class]
+      : parent.class
+  }
+}
+
+function renderClass (
+  staticClass,
+  dynamicClass
+) {
+  if (isDef(staticClass) || isDef(dynamicClass)) {
+    return concat(staticClass, stringifyClass(dynamicClass))
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function concat (a, b) {
+  return a ? b ? (a + ' ' + b) : a : (b || '')
+}
+
+function stringifyClass (value) {
+  if (Array.isArray(value)) {
+    return stringifyArray(value)
+  }
+  if (isObject(value)) {
+    return stringifyObject(value)
+  }
+  if (typeof value === 'string') {
+    return value
+  }
+  /* istanbul ignore next */
+  return ''
+}
+
+function stringifyArray (value) {
+  var res = '';
+  var stringified;
+  for (var i = 0, l = value.length; i < l; i++) {
+    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+      if (res) { res += ' '; }
+      res += stringified;
+    }
+  }
+  return res
+}
+
+function stringifyObject (value) {
+  var res = '';
+  for (var key in value) {
+    if (value[key]) {
+      if (res) { res += ' '; }
+      res += key;
+    }
+  }
+  return res
+}
+
+/*  */
+
+var namespaceMap = {
+  svg: 'http://www.w3.org/2000/svg',
+  math: 'http://www.w3.org/1998/Math/MathML'
+};
+
+var isHTMLTag = makeMap(
+  'html,body,base,head,link,meta,style,title,' +
+  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+  'embed,object,param,source,canvas,script,noscript,del,ins,' +
+  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+  'output,progress,select,textarea,' +
+  'details,dialog,menu,menuitem,summary,' +
+  'content,element,shadow,template,blockquote,iframe,tfoot'
+);
+
+// this map is intentionally selective, only covering SVG elements that may
+// contain child elements.
+var isSVG = makeMap(
+  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+  true
+);
+
+var isReservedTag = function (tag) {
+  return isHTMLTag(tag) || isSVG(tag)
+};
+
+function getTagNamespace (tag) {
+  if (isSVG(tag)) {
+    return 'svg'
+  }
+  // basic support for MathML
+  // note it doesn't support other MathML elements being component roots
+  if (tag === 'math') {
+    return 'math'
+  }
+}
+
+var unknownElementCache = Object.create(null);
+function isUnknownElement (tag) {
+  /* istanbul ignore if */
+  if (!inBrowser) {
+    return true
+  }
+  if (isReservedTag(tag)) {
+    return false
+  }
+  tag = tag.toLowerCase();
+  /* istanbul ignore if */
+  if (unknownElementCache[tag] != null) {
+    return unknownElementCache[tag]
+  }
+  var el = document.createElement(tag);
+  if (tag.indexOf('-') > -1) {
+    // http://stackoverflow.com/a/28210364/1070244
+    return (unknownElementCache[tag] = (
+      el.constructor === window.HTMLUnknownElement ||
+      el.constructor === window.HTMLElement
+    ))
+  } else {
+    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+  }
+}
+
+var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+/*  */
+
+/**
+ * Query an element selector if it's not an element already.
+ */
+function query (el) {
+  if (typeof el === 'string') {
+    var selected = document.querySelector(el);
+    if (!selected) {
+      warn(
+        'Cannot find element: ' + el
+      );
+      return document.createElement('div')
+    }
+    return selected
+  } else {
+    return el
+  }
+}
+
+/*  */
+
+function createElement$1 (tagName, vnode) {
+  var elm = document.createElement(tagName);
+  if (tagName !== 'select') {
+    return elm
+  }
+  // false or null will remove the attribute but undefined will not
+  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+    elm.setAttribute('multiple', 'multiple');
+  }
+  return elm
+}
+
+function createElementNS (namespace, tagName) {
+  return document.createElementNS(namespaceMap[namespace], tagName)
+}
+
+function createTextNode (text) {
+  return document.createTextNode(text)
+}
+
+function createComment (text) {
+  return document.createComment(text)
+}
+
+function insertBefore (parentNode, newNode, referenceNode) {
+  parentNode.insertBefore(newNode, referenceNode);
+}
+
+function removeChild (node, child) {
+  node.removeChild(child);
+}
+
+function appendChild (node, child) {
+  node.appendChild(child);
+}
+
+function parentNode (node) {
+  return node.parentNode
+}
+
+function nextSibling (node) {
+  return node.nextSibling
+}
+
+function tagName (node) {
+  return node.tagName
+}
+
+function setTextContent (node, text) {
+  node.textContent = text;
+}
+
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
+});
+
+/*  */
+
+var ref = {
+  create: function create (_, vnode) {
+    registerRef(vnode);
+  },
+  update: function update (oldVnode, vnode) {
+    if (oldVnode.data.ref !== vnode.data.ref) {
+      registerRef(oldVnode, true);
+      registerRef(vnode);
+    }
+  },
+  destroy: function destroy (vnode) {
+    registerRef(vnode, true);
+  }
+};
+
+function registerRef (vnode, isRemoval) {
+  var key = vnode.data.ref;
+  if (!isDef(key)) { return }
+
+  var vm = vnode.context;
+  var ref = vnode.componentInstance || vnode.elm;
+  var refs = vm.$refs;
+  if (isRemoval) {
+    if (Array.isArray(refs[key])) {
+      remove(refs[key], ref);
+    } else if (refs[key] === ref) {
+      refs[key] = undefined;
+    }
+  } else {
+    if (vnode.data.refInFor) {
+      if (!Array.isArray(refs[key])) {
+        refs[key] = [ref];
+      } else if (refs[key].indexOf(ref) < 0) {
+        // $flow-disable-line
+        refs[key].push(ref);
+      }
+    } else {
+      refs[key] = ref;
+    }
+  }
+}
+
+/**
+ * Virtual DOM patching algorithm based on Snabbdom by
+ * Simon Friis Vindum (@paldepind)
+ * Licensed under the MIT License
+ * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+ *
+ * modified by Evan You (@yyx990803)
+ *
+ * Not type-checking this because this file is perf-critical and the cost
+ * of making flow understand it is not worth it.
+ */
+
+var emptyNode = new VNode('', {}, []);
+
+var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+function sameVnode (a, b) {
+  return (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
+      (
+        a.tag === b.tag &&
+        a.isComment === b.isComment &&
+        isDef(a.data) === isDef(b.data) &&
+        sameInputType(a, b)
+      ) || (
+        isTrue(a.isAsyncPlaceholder) &&
+        isUndef(b.asyncFactory.error)
+      )
+    )
+  )
+}
+
+function sameInputType (a, b) {
+  if (a.tag !== 'input') { return true }
+  var i;
+  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+}
+
+function createKeyToOldIdx (children, beginIdx, endIdx) {
+  var i, key;
+  var map = {};
+  for (i = beginIdx; i <= endIdx; ++i) {
+    key = children[i].key;
+    if (isDef(key)) { map[key] = i; }
+  }
+  return map
+}
+
+function createPatchFunction (backend) {
+  var i, j;
+  var cbs = {};
+
+  var modules = backend.modules;
+  var nodeOps = backend.nodeOps;
+
+  for (i = 0; i < hooks.length; ++i) {
+    cbs[hooks[i]] = [];
+    for (j = 0; j < modules.length; ++j) {
+      if (isDef(modules[j][hooks[i]])) {
+        cbs[hooks[i]].push(modules[j][hooks[i]]);
+      }
+    }
+  }
+
+  function emptyNodeAt (elm) {
+    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+  }
+
+  function createRmCb (childElm, listeners) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
+        removeNode(childElm);
+      }
+    }
+    remove$$1.listeners = listeners;
+    return remove$$1
+  }
+
+  function removeNode (el) {
+    var parent = nodeOps.parentNode(el);
+    // element may have already been removed due to v-html / v-text
+    if (isDef(parent)) {
+      nodeOps.removeChild(parent, el);
+    }
+  }
+
+  function isUnknownElement$$1 (vnode, inVPre) {
+    return (
+      !inVPre &&
+      !vnode.ns &&
+      !(
+        config.ignoredElements.length &&
+        config.ignoredElements.some(function (ignore) {
+          return isRegExp(ignore)
+            ? ignore.test(vnode.tag)
+            : ignore === vnode.tag
+        })
+      ) &&
+      config.isUnknownElement(vnode.tag)
+    )
+  }
+
+  var creatingElmInVPre = 0;
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    vnode.isRootInsert = !nested; // for transition enter check
+    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+      return
+    }
+
+    var data = vnode.data;
+    var children = vnode.children;
+    var tag = vnode.tag;
+    if (isDef(tag)) {
+      {
+        if (data && data.pre) {
+          creatingElmInVPre++;
+        }
+        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+          warn(
+            'Unknown custom element: <' + tag + '> - did you ' +
+            'register the component correctly? For recursive components, ' +
+            'make sure to provide the "name" option.',
+            vnode.context
+          );
+        }
+      }
+
+      vnode.elm = vnode.ns
+        ? nodeOps.createElementNS(vnode.ns, tag)
+        : nodeOps.createElement(tag, vnode);
+      setScope(vnode);
+
+      /* istanbul ignore if */
+      {
+        createChildren(vnode, children, insertedVnodeQueue);
+        if (isDef(data)) {
+          invokeCreateHooks(vnode, insertedVnodeQueue);
+        }
+        insert(parentElm, vnode.elm, refElm);
+      }
+
+      if (data && data.pre) {
+        creatingElmInVPre--;
+      }
+    } else if (isTrue(vnode.isComment)) {
+      vnode.elm = nodeOps.createComment(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    } else {
+      vnode.elm = nodeOps.createTextNode(vnode.text);
+      insert(parentElm, vnode.elm, refElm);
+    }
+  }
+
+  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i = vnode.data;
+    if (isDef(i)) {
+      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+      if (isDef(i = i.hook) && isDef(i = i.init)) {
+        i(vnode, false /* hydrating */);
+      }
+      // after calling the init hook, if the vnode is a child component
+      // it should've created a child instance and mounted it. the child
+      // component also has set the placeholder vnode's elm.
+      // in that case we can just return the element and be done.
+      if (isDef(vnode.componentInstance)) {
+        initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
+        if (isTrue(isReactivated)) {
+          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+        }
+        return true
+      }
+    }
+  }
+
+  function initComponent (vnode, insertedVnodeQueue) {
+    if (isDef(vnode.data.pendingInsert)) {
+      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+      vnode.data.pendingInsert = null;
+    }
+    vnode.elm = vnode.componentInstance.$el;
+    if (isPatchable(vnode)) {
+      invokeCreateHooks(vnode, insertedVnodeQueue);
+      setScope(vnode);
+    } else {
+      // empty component root.
+      // skip all element-related modules except for ref (#3455)
+      registerRef(vnode);
+      // make sure to invoke the insert hook
+      insertedVnodeQueue.push(vnode);
+    }
+  }
+
+  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+    var i;
+    // hack for #4339: a reactivated component with inner transition
+    // does not trigger because the inner node's created hooks are not called
+    // again. It's not ideal to involve module-specific logic in here but
+    // there doesn't seem to be a better way to do it.
+    var innerNode = vnode;
+    while (innerNode.componentInstance) {
+      innerNode = innerNode.componentInstance._vnode;
+      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+        for (i = 0; i < cbs.activate.length; ++i) {
+          cbs.activate[i](emptyNode, innerNode);
+        }
+        insertedVnodeQueue.push(innerNode);
+        break
+      }
+    }
+    // unlike a newly created component,
+    // a reactivated keep-alive component doesn't insert itself
+    insert(parentElm, vnode.elm, refElm);
+  }
+
+  function insert (parent, elm, ref$$1) {
+    if (isDef(parent)) {
+      if (isDef(ref$$1)) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
+          nodeOps.insertBefore(parent, elm, ref$$1);
+        }
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
+    }
+  }
+
+  function createChildren (vnode, children, insertedVnodeQueue) {
+    if (Array.isArray(children)) {
+      {
+        checkDuplicateKeys(children);
+      }
+      for (var i = 0; i < children.length; ++i) {
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+      }
+    } else if (isPrimitive(vnode.text)) {
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
+    }
+  }
+
+  function isPatchable (vnode) {
+    while (vnode.componentInstance) {
+      vnode = vnode.componentInstance._vnode;
+    }
+    return isDef(vnode.tag)
+  }
+
+  function invokeCreateHooks (vnode, insertedVnodeQueue) {
+    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+      cbs.create[i$1](emptyNode, vnode);
+    }
+    i = vnode.data.hook; // Reuse variable
+    if (isDef(i)) {
+      if (isDef(i.create)) { i.create(emptyNode, vnode); }
+      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    }
+  }
+
+  // set scope id attribute for scoped CSS.
+  // this is implemented as a special case to avoid the overhead
+  // of going through the normal attribute patching process.
+  function setScope (vnode) {
+    var i;
+    if (isDef(i = vnode.fnScopeId)) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    } else {
+      var ancestor = vnode;
+      while (ancestor) {
+        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+          nodeOps.setStyleScope(vnode.elm, i);
+        }
+        ancestor = ancestor.parent;
+      }
+    }
+    // for slot content they should also get the scopeId from the host instance.
+    if (isDef(i = activeInstance) &&
+      i !== vnode.context &&
+      i !== vnode.fnContext &&
+      isDef(i = i.$options._scopeId)
+    ) {
+      nodeOps.setStyleScope(vnode.elm, i);
+    }
+  }
+
+  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+    }
+  }
+
+  function invokeDestroyHook (vnode) {
+    var i, j;
+    var data = vnode.data;
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+    }
+    if (isDef(i = vnode.children)) {
+      for (j = 0; j < vnode.children.length; ++j) {
+        invokeDestroyHook(vnode.children[j]);
+      }
+    }
+  }
+
+  function removeVnodes (vnodes, startIdx, endIdx) {
+    for (; startIdx <= endIdx; ++startIdx) {
+      var ch = vnodes[startIdx];
+      if (isDef(ch)) {
+        if (isDef(ch.tag)) {
+          removeAndInvokeRemoveHook(ch);
+          invokeDestroyHook(ch);
+        } else { // Text node
+          removeNode(ch.elm);
+        }
+      }
+    }
+  }
+
+  function removeAndInvokeRemoveHook (vnode, rm) {
+    if (isDef(rm) || isDef(vnode.data)) {
+      var i;
+      var listeners = cbs.remove.length + 1;
+      if (isDef(rm)) {
+        // we have a recursively passed down rm callback
+        // increase the listeners count
+        rm.listeners += listeners;
+      } else {
+        // directly removing
+        rm = createRmCb(vnode.elm, listeners);
+      }
+      // recursively invoke hooks on child component root node
+      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+        removeAndInvokeRemoveHook(i, rm);
+      }
+      for (i = 0; i < cbs.remove.length; ++i) {
+        cbs.remove[i](vnode, rm);
+      }
+      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+        i(vnode, rm);
+      } else {
+        rm();
+      }
+    } else {
+      removeNode(vnode.elm);
+    }
+  }
+
+  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+    var oldStartIdx = 0;
+    var newStartIdx = 0;
+    var oldEndIdx = oldCh.length - 1;
+    var oldStartVnode = oldCh[0];
+    var oldEndVnode = oldCh[oldEndIdx];
+    var newEndIdx = newCh.length - 1;
+    var newStartVnode = newCh[0];
+    var newEndVnode = newCh[newEndIdx];
+    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+
+    // removeOnly is a special flag used only by <transition-group>
+    // to ensure removed elements stay in correct relative positions
+    // during leaving transitions
+    var canMove = !removeOnly;
+
+    {
+      checkDuplicateKeys(newCh);
+    }
+
+    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+      if (isUndef(oldStartVnode)) {
+        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+      } else if (isUndef(oldEndVnode)) {
+        oldEndVnode = oldCh[--oldEndIdx];
+      } else if (sameVnode(oldStartVnode, newStartVnode)) {
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        oldStartVnode = oldCh[++oldStartIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else if (sameVnode(oldEndVnode, newEndVnode)) {
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+        oldStartVnode = oldCh[++oldStartIdx];
+        newEndVnode = newCh[--newEndIdx];
+      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+        oldEndVnode = oldCh[--oldEndIdx];
+        newStartVnode = newCh[++newStartIdx];
+      } else {
+        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+        idxInOld = isDef(newStartVnode.key)
+          ? oldKeyToIdx[newStartVnode.key]
+          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+        if (isUndef(idxInOld)) { // New element
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+        } else {
+          vnodeToMove = oldCh[idxInOld];
+          if (sameVnode(vnodeToMove, newStartVnode)) {
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+            oldCh[idxInOld] = undefined;
+            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+          }
+        }
+        newStartVnode = newCh[++newStartIdx];
+      }
+    }
+    if (oldStartIdx > oldEndIdx) {
+      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+    } else if (newStartIdx > newEndIdx) {
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+    }
+  }
+
+  function checkDuplicateKeys (children) {
+    var seenKeys = {};
+    for (var i = 0; i < children.length; i++) {
+      var vnode = children[i];
+      var key = vnode.key;
+      if (isDef(key)) {
+        if (seenKeys[key]) {
+          warn(
+            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+            vnode.context
+          );
+        } else {
+          seenKeys[key] = true;
+        }
+      }
+    }
+  }
+
+  function findIdxInOld (node, oldCh, start, end) {
+    for (var i = start; i < end; i++) {
+      var c = oldCh[i];
+      if (isDef(c) && sameVnode(node, c)) { return i }
+    }
+  }
+
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
+    if (oldVnode === vnode) {
+      return
+    }
+
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
+    var elm = vnode.elm = oldVnode.elm;
+
+    if (isTrue(oldVnode.isAsyncPlaceholder)) {
+      if (isDef(vnode.asyncFactory.resolved)) {
+        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+      } else {
+        vnode.isAsyncPlaceholder = true;
+      }
+      return
+    }
+
+    // reuse element for static trees.
+    // note we only do this if the vnode is cloned -
+    // if the new node is not cloned it means the render functions have been
+    // reset by the hot-reload-api and we need to do a proper re-render.
+    if (isTrue(vnode.isStatic) &&
+      isTrue(oldVnode.isStatic) &&
+      vnode.key === oldVnode.key &&
+      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+    ) {
+      vnode.componentInstance = oldVnode.componentInstance;
+      return
+    }
+
+    var i;
+    var data = vnode.data;
+    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+      i(oldVnode, vnode);
+    }
+
+    var oldCh = oldVnode.children;
+    var ch = vnode.children;
+    if (isDef(data) && isPatchable(vnode)) {
+      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+    }
+    if (isUndef(vnode.text)) {
+      if (isDef(oldCh) && isDef(ch)) {
+        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+      } else if (isDef(ch)) {
+        {
+          checkDuplicateKeys(ch);
+        }
+        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+      } else if (isDef(oldCh)) {
+        removeVnodes(oldCh, 0, oldCh.length - 1);
+      } else if (isDef(oldVnode.text)) {
+        nodeOps.setTextContent(elm, '');
+      }
+    } else if (oldVnode.text !== vnode.text) {
+      nodeOps.setTextContent(elm, vnode.text);
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
+    }
+  }
+
+  function invokeInsertHook (vnode, queue, initial) {
+    // delay insert hooks for component root nodes, invoke them after the
+    // element is really inserted
+    if (isTrue(initial) && isDef(vnode.parent)) {
+      vnode.parent.data.pendingInsert = queue;
+    } else {
+      for (var i = 0; i < queue.length; ++i) {
+        queue[i].data.hook.insert(queue[i]);
+      }
+    }
+  }
+
+  var hydrationBailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  // Note: style is excluded because it relies on initial clone for future
+  // deep updates (#7063).
+  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
+  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+    var i;
+    var tag = vnode.tag;
+    var data = vnode.data;
+    var children = vnode.children;
+    inVPre = inVPre || (data && data.pre);
+    vnode.elm = elm;
+
+    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+      vnode.isAsyncPlaceholder = true;
+      return true
+    }
+    // assert node match
+    {
+      if (!assertNodeMatch(elm, vnode, inVPre)) {
+        return false
+      }
+    }
+    if (isDef(data)) {
+      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+      if (isDef(i = vnode.componentInstance)) {
+        // child component. it should have hydrated its own tree.
+        initComponent(vnode, insertedVnodeQueue);
+        return true
+      }
+    }
+    if (isDef(tag)) {
+      if (isDef(children)) {
+        // empty element, allow client to pick up and populate children
+        if (!elm.hasChildNodes()) {
+          createChildren(vnode, children, insertedVnodeQueue);
+        } else {
+          // v-html and domProps: innerHTML
+          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+            if (i !== elm.innerHTML) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('server innerHTML: ', i);
+                console.warn('client innerHTML: ', elm.innerHTML);
+              }
+              return false
+            }
+          } else {
+            // iterate and compare children lists
+            var childrenMatch = true;
+            var childNode = elm.firstChild;
+            for (var i$1 = 0; i$1 < children.length; i$1++) {
+              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                childrenMatch = false;
+                break
+              }
+              childNode = childNode.nextSibling;
+            }
+            // if childNode is not null, it means the actual childNodes list is
+            // longer than the virtual children list.
+            if (!childrenMatch || childNode) {
+              /* istanbul ignore if */
+              if (typeof console !== 'undefined' &&
+                !hydrationBailed
+              ) {
+                hydrationBailed = true;
+                console.warn('Parent: ', elm);
+                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+              }
+              return false
+            }
+          }
+        }
+      }
+      if (isDef(data)) {
+        var fullInvoke = false;
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            fullInvoke = true;
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
+        if (!fullInvoke && data['class']) {
+          // ensure collecting deps for deep class bindings for future updates
+          traverse(data['class']);
+        }
+      }
+    } else if (elm.data !== vnode.text) {
+      elm.data = vnode.text;
+    }
+    return true
+  }
+
+  function assertNodeMatch (node, vnode, inVPre) {
+    if (isDef(vnode.tag)) {
+      return vnode.tag.indexOf('vue-component') === 0 || (
+        !isUnknownElement$$1(vnode, inVPre) &&
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+      )
+    } else {
+      return node.nodeType === (vnode.isComment ? 8 : 3)
+    }
+  }
+
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
+    if (isUndef(vnode)) {
+      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+      return
+    }
+
+    var isInitialPatch = false;
+    var insertedVnodeQueue = [];
+
+    if (isUndef(oldVnode)) {
+      // empty mount (likely as component), create new root element
+      isInitialPatch = true;
+      createElm(vnode, insertedVnodeQueue);
+    } else {
+      var isRealElement = isDef(oldVnode.nodeType);
+      if (!isRealElement && sameVnode(oldVnode, vnode)) {
+        // patch existing root node
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+      } else {
+        if (isRealElement) {
+          // mounting to a real element
+          // check if this is server-rendered content and if we can perform
+          // a successful hydration.
+          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+            oldVnode.removeAttribute(SSR_ATTR);
+            hydrating = true;
+          }
+          if (isTrue(hydrating)) {
+            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+              invokeInsertHook(vnode, insertedVnodeQueue, true);
+              return oldVnode
+            } else {
+              warn(
+                'The client-side rendered virtual DOM tree is not matching ' +
+                'server-rendered content. This is likely caused by incorrect ' +
+                'HTML markup, for example nesting block-level elements inside ' +
+                '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                'full client-side render.'
+              );
+            }
+          }
+          // either not server-rendered, or hydration failed.
+          // create an empty node and replace it
+          oldVnode = emptyNodeAt(oldVnode);
+        }
+
+        // replacing existing element
+        var oldElm = oldVnode.elm;
+        var parentElm = nodeOps.parentNode(oldElm);
+
+        // create new node
+        createElm(
+          vnode,
+          insertedVnodeQueue,
+          // extremely rare edge case: do not insert if old element is in a
+          // leaving transition. Only happens when combining transition +
+          // keep-alive + HOCs. (#4590)
+          oldElm._leaveCb ? null : parentElm,
+          nodeOps.nextSibling(oldElm)
+        );
+
+        // update parent placeholder node element, recursively
+        if (isDef(vnode.parent)) {
+          var ancestor = vnode.parent;
+          var patchable = isPatchable(vnode);
+          while (ancestor) {
+            for (var i = 0; i < cbs.destroy.length; ++i) {
+              cbs.destroy[i](ancestor);
+            }
+            ancestor.elm = vnode.elm;
+            if (patchable) {
+              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                cbs.create[i$1](emptyNode, ancestor);
+              }
+              // #6513
+              // invoke insert hooks that may have been merged by create hooks.
+              // e.g. for directives that uses the "inserted" hook.
+              var insert = ancestor.data.hook.insert;
+              if (insert.merged) {
+                // start at index 1 to avoid re-invoking component mounted hook
+                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                  insert.fns[i$2]();
+                }
+              }
+            } else {
+              registerRef(ancestor);
+            }
+            ancestor = ancestor.parent;
+          }
+        }
+
+        // destroy old node
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
+        } else if (isDef(oldVnode.tag)) {
+          invokeDestroyHook(oldVnode);
+        }
+      }
+    }
+
+    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+    return vnode.elm
+  }
+}
+
+/*  */
+
+var directives = {
+  create: updateDirectives,
+  update: updateDirectives,
+  destroy: function unbindDirectives (vnode) {
+    updateDirectives(vnode, emptyNode);
+  }
+};
+
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
+  }
+}
+
+function _update (oldVnode, vnode) {
+  var isCreate = oldVnode === emptyNode;
+  var isDestroy = vnode === emptyNode;
+  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+
+  var dirsWithInsert = [];
+  var dirsWithPostpatch = [];
+
+  var key, oldDir, dir;
+  for (key in newDirs) {
+    oldDir = oldDirs[key];
+    dir = newDirs[key];
+    if (!oldDir) {
+      // new directive, bind
+      callHook$1(dir, 'bind', vnode, oldVnode);
+      if (dir.def && dir.def.inserted) {
+        dirsWithInsert.push(dir);
+      }
+    } else {
+      // existing directive, update
+      dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
+      callHook$1(dir, 'update', vnode, oldVnode);
+      if (dir.def && dir.def.componentUpdated) {
+        dirsWithPostpatch.push(dir);
+      }
+    }
+  }
+
+  if (dirsWithInsert.length) {
+    var callInsert = function () {
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
+    };
+    if (isCreate) {
+      mergeVNodeHook(vnode, 'insert', callInsert);
+    } else {
+      callInsert();
+    }
+  }
+
+  if (dirsWithPostpatch.length) {
+    mergeVNodeHook(vnode, 'postpatch', function () {
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
+    });
+  }
+
+  if (!isCreate) {
+    for (key in oldDirs) {
+      if (!newDirs[key]) {
+        // no longer present, unbind
+        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+      }
+    }
+  }
+}
+
+var emptyModifiers = Object.create(null);
+
+function normalizeDirectives$1 (
+  dirs,
+  vm
+) {
+  var res = Object.create(null);
+  if (!dirs) {
+    // $flow-disable-line
+    return res
+  }
+  var i, dir;
+  for (i = 0; i < dirs.length; i++) {
+    dir = dirs[i];
+    if (!dir.modifiers) {
+      // $flow-disable-line
+      dir.modifiers = emptyModifiers;
+    }
+    res[getRawDirName(dir)] = dir;
+    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+  }
+  // $flow-disable-line
+  return res
+}
+
+function getRawDirName (dir) {
+  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+}
+
+function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+  var fn = dir.def && dir.def[hook];
+  if (fn) {
+    try {
+      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+    } catch (e) {
+      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+    }
+  }
+}
+
+var baseModules = [
+  ref,
+  directives
+];
+
+/*  */
+
+function updateAttrs (oldVnode, vnode) {
+  var opts = vnode.componentOptions;
+  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+    return
+  }
+  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+    return
+  }
+  var key, cur, old;
+  var elm = vnode.elm;
+  var oldAttrs = oldVnode.data.attrs || {};
+  var attrs = vnode.data.attrs || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(attrs.__ob__)) {
+    attrs = vnode.data.attrs = extend({}, attrs);
+  }
+
+  for (key in attrs) {
+    cur = attrs[key];
+    old = oldAttrs[key];
+    if (old !== cur) {
+      setAttr(elm, key, cur, vnode.data.pre);
+    }
+  }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  // #6666: IE/Edge forces progress value down to 1 before setting a max
+  /* istanbul ignore if */
+  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
+  for (key in oldAttrs) {
+    if (isUndef(attrs[key])) {
+      if (isXlink(key)) {
+        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else if (!isEnumeratedAttr(key)) {
+        elm.removeAttribute(key);
+      }
+    }
+  }
+}
+
+function setAttr (el, key, value, isInPre) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
+    // set attribute for blank value
+    // e.g. <option disabled>Select one</option>
+    if (isFalsyAttrValue(value)) {
+      el.removeAttribute(key);
+    } else {
+      // technically allowfullscreen is a boolean attribute for <iframe>,
+      // but Flash expects a value of "true" when used on <embed> tag
+      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+        ? 'true'
+        : key;
+      el.setAttribute(key, value);
+    }
+  } else if (isEnumeratedAttr(key)) {
+    el.setAttribute(key, convertEnumeratedValue(key, value));
+  } else if (isXlink(key)) {
+    if (isFalsyAttrValue(value)) {
+      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+    } else {
+      el.setAttributeNS(xlinkNS, key, value);
+    }
+  } else {
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
+    }
+    el.setAttribute(key, value);
+  }
+}
+
+var attrs = {
+  create: updateAttrs,
+  update: updateAttrs
+};
+
+/*  */
+
+function updateClass (oldVnode, vnode) {
+  var el = vnode.elm;
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+  if (
+    isUndef(data.staticClass) &&
+    isUndef(data.class) && (
+      isUndef(oldData) || (
+        isUndef(oldData.staticClass) &&
+        isUndef(oldData.class)
+      )
+    )
+  ) {
+    return
+  }
+
+  var cls = genClassForVnode(vnode);
+
+  // handle transition classes
+  var transitionClass = el._transitionClasses;
+  if (isDef(transitionClass)) {
+    cls = concat(cls, stringifyClass(transitionClass));
+  }
+
+  // set the class
+  if (cls !== el._prevClass) {
+    el.setAttribute('class', cls);
+    el._prevClass = cls;
+  }
+}
+
+var klass = {
+  create: updateClass,
+  update: updateClass
+};
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// in some cases, the event used has to be determined at runtime
+// so we used some reserved tokens during compile.
+var RANGE_TOKEN = '__r';
+var CHECKBOX_RADIO_TOKEN = '__c';
+
+/*  */
+
+// normalize v-model event tokens that can only be determined at runtime.
+// it's important to place the event as the first in the array because
+// the whole point is ensuring the v-model callback gets called before
+// user-attached handlers.
+function normalizeEvents (on) {
+  /* istanbul ignore if */
+  if (isDef(on[RANGE_TOKEN])) {
+    // IE input[type=range] only supports `change` event
+    var event = isIE ? 'change' : 'input';
+    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+    delete on[RANGE_TOKEN];
+  }
+  // This was originally intended to fix #4521 but no longer necessary
+  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+  /* istanbul ignore if */
+  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+    delete on[CHECKBOX_RADIO_TOKEN];
+  }
+}
+
+var target$1;
+
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+function add$1 (
+  name,
+  handler,
+  capture,
+  passive
+) {
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
+  target$1.addEventListener(
+    name,
+    handler,
+    supportsPassive
+      ? { capture: capture, passive: passive }
+      : capture
+  );
+}
+
+function remove$2 (
+  name,
+  handler,
+  capture,
+  _target
+) {
+  (_target || target$1).removeEventListener(
+    name,
+    handler._wrapper || handler,
+    capture
+  );
+}
+
+function updateDOMListeners (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+    return
+  }
+  var on = vnode.data.on || {};
+  var oldOn = oldVnode.data.on || {};
+  target$1 = vnode.elm;
+  normalizeEvents(on);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+  target$1 = undefined;
+}
+
+var events = {
+  create: updateDOMListeners,
+  update: updateDOMListeners
+};
+
+/*  */
+
+var svgContainer;
+
+function updateDOMProps (oldVnode, vnode) {
+  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+    return
+  }
+  var key, cur;
+  var elm = vnode.elm;
+  var oldProps = oldVnode.data.domProps || {};
+  var props = vnode.data.domProps || {};
+  // clone observed objects, as the user probably wants to mutate it
+  if (isDef(props.__ob__)) {
+    props = vnode.data.domProps = extend({}, props);
+  }
+
+  for (key in oldProps) {
+    if (!(key in props)) {
+      elm[key] = '';
+    }
+  }
+
+  for (key in props) {
+    cur = props[key];
+    // ignore children if the node has textContent or innerHTML,
+    // as these will throw away existing DOM nodes and cause removal errors
+    // on subsequent patches (#3360)
+    if (key === 'textContent' || key === 'innerHTML') {
+      if (vnode.children) { vnode.children.length = 0; }
+      if (cur === oldProps[key]) { continue }
+      // #6601 work around Chrome version <= 55 bug where single textNode
+      // replaced by innerHTML/textContent retains its parentNode property
+      if (elm.childNodes.length === 1) {
+        elm.removeChild(elm.childNodes[0]);
+      }
+    }
+
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
+      // store value as _value as well since
+      // non-string values will be stringified
+      elm._value = cur;
+      // avoid resetting cursor position when value is the same
+      var strCur = isUndef(cur) ? '' : String(cur);
+      if (shouldUpdateValue(elm, strCur)) {
+        elm.value = strCur;
+      }
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
+    }
+  }
+}
+
+// check platforms/web/util/attrs.js acceptValue
+
+
+function shouldUpdateValue (elm, checkVal) {
+  return (!elm.composing && (
+    elm.tagName === 'OPTION' ||
+    isNotInFocusAndDirty(elm, checkVal) ||
+    isDirtyWithModifiers(elm, checkVal)
+  ))
+}
+
+function isNotInFocusAndDirty (elm, checkVal) {
+  // return true when textbox (.number and .trim) loses focus and its value is
+  // not equal to the updated value
+  var notInFocus = true;
+  // #6157
+  // work around IE bug when accessing document.activeElement in an iframe
+  try { notInFocus = document.activeElement !== elm; } catch (e) {}
+  return notInFocus && elm.value !== checkVal
+}
+
+function isDirtyWithModifiers (elm, newVal) {
+  var value = elm.value;
+  var modifiers = elm._vModifiers; // injected by v-model runtime
+  if (isDef(modifiers)) {
+    if (modifiers.number) {
+      return toNumber(value) !== toNumber(newVal)
+    }
+    if (modifiers.trim) {
+      return value.trim() !== newVal.trim()
+    }
+  }
+  return value !== newVal
+}
+
+var domProps = {
+  create: updateDOMProps,
+  update: updateDOMProps
+};
+
+/*  */
+
+var parseStyleText = cached(function (cssText) {
+  var res = {};
+  var listDelimiter = /;(?![^(]*\))/g;
+  var propertyDelimiter = /:(.+)/;
+  cssText.split(listDelimiter).forEach(function (item) {
+    if (item) {
+      var tmp = item.split(propertyDelimiter);
+      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+    }
+  });
+  return res
+});
+
+// merge static and dynamic style data on the same vnode
+function normalizeStyleData (data) {
+  var style = normalizeStyleBinding(data.style);
+  // static style is pre-processed into an object during compilation
+  // and is always a fresh object, so it's safe to merge into it
+  return data.staticStyle
+    ? extend(data.staticStyle, style)
+    : style
+}
+
+// normalize possible array / string values into Object
+function normalizeStyleBinding (bindingStyle) {
+  if (Array.isArray(bindingStyle)) {
+    return toObject(bindingStyle)
+  }
+  if (typeof bindingStyle === 'string') {
+    return parseStyleText(bindingStyle)
+  }
+  return bindingStyle
+}
+
+/**
+ * parent component style should be after child's
+ * so that parent component's style could override it
+ */
+function getStyle (vnode, checkChild) {
+  var res = {};
+  var styleData;
+
+  if (checkChild) {
+    var childNode = vnode;
+    while (childNode.componentInstance) {
+      childNode = childNode.componentInstance._vnode;
+      if (
+        childNode && childNode.data &&
+        (styleData = normalizeStyleData(childNode.data))
+      ) {
+        extend(res, styleData);
+      }
+    }
+  }
+
+  if ((styleData = normalizeStyleData(vnode.data))) {
+    extend(res, styleData);
+  }
+
+  var parentNode = vnode;
+  while ((parentNode = parentNode.parent)) {
+    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+      extend(res, styleData);
+    }
+  }
+  return res
+}
+
+/*  */
+
+var cssVarRE = /^--/;
+var importantRE = /\s*!important$/;
+var setProp = function (el, name, val) {
+  /* istanbul ignore if */
+  if (cssVarRE.test(name)) {
+    el.style.setProperty(name, val);
+  } else if (importantRE.test(val)) {
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+  } else {
+    var normalizedName = normalize(name);
+    if (Array.isArray(val)) {
+      // Support values array created by autoprefixer, e.g.
+      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+      // Set them one by one, and the browser will only set those it can recognize
+      for (var i = 0, len = val.length; i < len; i++) {
+        el.style[normalizedName] = val[i];
+      }
+    } else {
+      el.style[normalizedName] = val;
+    }
+  }
+};
+
+var vendorNames = ['Webkit', 'Moz', 'ms'];
+
+var emptyStyle;
+var normalize = cached(function (prop) {
+  emptyStyle = emptyStyle || document.createElement('div').style;
+  prop = camelize(prop);
+  if (prop !== 'filter' && (prop in emptyStyle)) {
+    return prop
+  }
+  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+  for (var i = 0; i < vendorNames.length; i++) {
+    var name = vendorNames[i] + capName;
+    if (name in emptyStyle) {
+      return name
+    }
+  }
+});
+
+function updateStyle (oldVnode, vnode) {
+  var data = vnode.data;
+  var oldData = oldVnode.data;
+
+  if (isUndef(data.staticStyle) && isUndef(data.style) &&
+    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  ) {
+    return
+  }
+
+  var cur, name;
+  var el = vnode.elm;
+  var oldStaticStyle = oldData.staticStyle;
+  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
+
+  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+  var oldStyle = oldStaticStyle || oldStyleBinding;
+
+  var style = normalizeStyleBinding(vnode.data.style) || {};
+
+  // store normalized style under a different key for next diff
+  // make sure to clone it if it's reactive, since the user likely wants
+  // to mutate it.
+  vnode.data.normalizedStyle = isDef(style.__ob__)
+    ? extend({}, style)
+    : style;
+
+  var newStyle = getStyle(vnode, true);
+
+  for (name in oldStyle) {
+    if (isUndef(newStyle[name])) {
+      setProp(el, name, '');
+    }
+  }
+  for (name in newStyle) {
+    cur = newStyle[name];
+    if (cur !== oldStyle[name]) {
+      // ie9 setting to null has no effect, must use empty string
+      setProp(el, name, cur == null ? '' : cur);
+    }
+  }
+}
+
+var style = {
+  create: updateStyle,
+  update: updateStyle
+};
+
+/*  */
+
+var whitespaceRE = /\s+/;
+
+/**
+ * Add class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function addClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+    } else {
+      el.classList.add(cls);
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    if (cur.indexOf(' ' + cls + ' ') < 0) {
+      el.setAttribute('class', (cur + cls).trim());
+    }
+  }
+}
+
+/**
+ * Remove class with compatibility for SVG since classList is not supported on
+ * SVG elements in IE
+ */
+function removeClass (el, cls) {
+  /* istanbul ignore if */
+  if (!cls || !(cls = cls.trim())) {
+    return
+  }
+
+  /* istanbul ignore else */
+  if (el.classList) {
+    if (cls.indexOf(' ') > -1) {
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+    } else {
+      el.classList.remove(cls);
+    }
+    if (!el.classList.length) {
+      el.removeAttribute('class');
+    }
+  } else {
+    var cur = " " + (el.getAttribute('class') || '') + " ";
+    var tar = ' ' + cls + ' ';
+    while (cur.indexOf(tar) >= 0) {
+      cur = cur.replace(tar, ' ');
+    }
+    cur = cur.trim();
+    if (cur) {
+      el.setAttribute('class', cur);
+    } else {
+      el.removeAttribute('class');
+    }
+  }
+}
+
+/*  */
+
+function resolveTransition (def$$1) {
+  if (!def$$1) {
+    return
+  }
+  /* istanbul ignore else */
+  if (typeof def$$1 === 'object') {
+    var res = {};
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
+    }
+    extend(res, def$$1);
+    return res
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
+  }
+}
+
+var autoCssTransition = cached(function (name) {
+  return {
+    enterClass: (name + "-enter"),
+    enterToClass: (name + "-enter-to"),
+    enterActiveClass: (name + "-enter-active"),
+    leaveClass: (name + "-leave"),
+    leaveToClass: (name + "-leave-to"),
+    leaveActiveClass: (name + "-leave-active")
+  }
+});
+
+var hasTransition = inBrowser && !isIE9;
+var TRANSITION = 'transition';
+var ANIMATION = 'animation';
+
+// Transition property/event sniffing
+var transitionProp = 'transition';
+var transitionEndEvent = 'transitionend';
+var animationProp = 'animation';
+var animationEndEvent = 'animationend';
+if (hasTransition) {
+  /* istanbul ignore if */
+  if (window.ontransitionend === undefined &&
+    window.onwebkittransitionend !== undefined
+  ) {
+    transitionProp = 'WebkitTransition';
+    transitionEndEvent = 'webkitTransitionEnd';
+  }
+  if (window.onanimationend === undefined &&
+    window.onwebkitanimationend !== undefined
+  ) {
+    animationProp = 'WebkitAnimation';
+    animationEndEvent = 'webkitAnimationEnd';
+  }
+}
+
+// binding to window is necessary to make hot reload work in IE in strict mode
+var raf = inBrowser
+  ? window.requestAnimationFrame
+    ? window.requestAnimationFrame.bind(window)
+    : setTimeout
+  : /* istanbul ignore next */ function (fn) { return fn(); };
+
+function nextFrame (fn) {
+  raf(function () {
+    raf(fn);
+  });
+}
+
+function addTransitionClass (el, cls) {
+  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+  if (transitionClasses.indexOf(cls) < 0) {
+    transitionClasses.push(cls);
+    addClass(el, cls);
+  }
+}
+
+function removeTransitionClass (el, cls) {
+  if (el._transitionClasses) {
+    remove(el._transitionClasses, cls);
+  }
+  removeClass(el, cls);
+}
+
+function whenTransitionEnds (
+  el,
+  expectedType,
+  cb
+) {
+  var ref = getTransitionInfo(el, expectedType);
+  var type = ref.type;
+  var timeout = ref.timeout;
+  var propCount = ref.propCount;
+  if (!type) { return cb() }
+  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+  var ended = 0;
+  var end = function () {
+    el.removeEventListener(event, onEnd);
+    cb();
+  };
+  var onEnd = function (e) {
+    if (e.target === el) {
+      if (++ended >= propCount) {
+        end();
+      }
+    }
+  };
+  setTimeout(function () {
+    if (ended < propCount) {
+      end();
+    }
+  }, timeout + 1);
+  el.addEventListener(event, onEnd);
+}
+
+var transformRE = /\b(transform|all)(,|$)/;
+
+function getTransitionInfo (el, expectedType) {
+  var styles = window.getComputedStyle(el);
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+  var animationTimeout = getTimeout(animationDelays, animationDurations);
+
+  var type;
+  var timeout = 0;
+  var propCount = 0;
+  /* istanbul ignore if */
+  if (expectedType === TRANSITION) {
+    if (transitionTimeout > 0) {
+      type = TRANSITION;
+      timeout = transitionTimeout;
+      propCount = transitionDurations.length;
+    }
+  } else if (expectedType === ANIMATION) {
+    if (animationTimeout > 0) {
+      type = ANIMATION;
+      timeout = animationTimeout;
+      propCount = animationDurations.length;
+    }
+  } else {
+    timeout = Math.max(transitionTimeout, animationTimeout);
+    type = timeout > 0
+      ? transitionTimeout > animationTimeout
+        ? TRANSITION
+        : ANIMATION
+      : null;
+    propCount = type
+      ? type === TRANSITION
+        ? transitionDurations.length
+        : animationDurations.length
+      : 0;
+  }
+  var hasTransform =
+    type === TRANSITION &&
+    transformRE.test(styles[transitionProp + 'Property']);
+  return {
+    type: type,
+    timeout: timeout,
+    propCount: propCount,
+    hasTransform: hasTransform
+  }
+}
+
+function getTimeout (delays, durations) {
+  /* istanbul ignore next */
+  while (delays.length < durations.length) {
+    delays = delays.concat(delays);
+  }
+
+  return Math.max.apply(null, durations.map(function (d, i) {
+    return toMs(d) + toMs(delays[i])
+  }))
+}
+
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
+function toMs (s) {
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
+}
+
+/*  */
+
+function enter (vnode, toggleDisplay) {
+  var el = vnode.elm;
+
+  // call leave callback now
+  if (isDef(el._leaveCb)) {
+    el._leaveCb.cancelled = true;
+    el._leaveCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data)) {
+    return
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._enterCb) || el.nodeType !== 1) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var enterClass = data.enterClass;
+  var enterToClass = data.enterToClass;
+  var enterActiveClass = data.enterActiveClass;
+  var appearClass = data.appearClass;
+  var appearToClass = data.appearToClass;
+  var appearActiveClass = data.appearActiveClass;
+  var beforeEnter = data.beforeEnter;
+  var enter = data.enter;
+  var afterEnter = data.afterEnter;
+  var enterCancelled = data.enterCancelled;
+  var beforeAppear = data.beforeAppear;
+  var appear = data.appear;
+  var afterAppear = data.afterAppear;
+  var appearCancelled = data.appearCancelled;
+  var duration = data.duration;
+
+  // activeInstance will always be the <transition> component managing this
+  // transition. One edge case to check is when the <transition> is placed
+  // as the root node of a child component. In that case we need to check
+  // <transition>'s parent for appear check.
+  var context = activeInstance;
+  var transitionNode = activeInstance.$vnode;
+  while (transitionNode && transitionNode.parent) {
+    context = transitionNode.context;
+    transitionNode = transitionNode.parent;
+  }
+
+  var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+  if (isAppear && !appear && appear !== '') {
+    return
+  }
+
+  var startClass = isAppear && appearClass
+    ? appearClass
+    : enterClass;
+  var activeClass = isAppear && appearActiveClass
+    ? appearActiveClass
+    : enterActiveClass;
+  var toClass = isAppear && appearToClass
+    ? appearToClass
+    : enterToClass;
+
+  var beforeEnterHook = isAppear
+    ? (beforeAppear || beforeEnter)
+    : beforeEnter;
+  var enterHook = isAppear
+    ? (typeof appear === 'function' ? appear : enter)
+    : enter;
+  var afterEnterHook = isAppear
+    ? (afterAppear || afterEnter)
+    : afterEnter;
+  var enterCancelledHook = isAppear
+    ? (appearCancelled || enterCancelled)
+    : enterCancelled;
+
+  var explicitEnterDuration = toNumber(
+    isObject(duration)
+      ? duration.enter
+      : duration
+  );
+
+  if (explicitEnterDuration != null) {
+    checkDuration(explicitEnterDuration, 'enter', vnode);
+  }
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(enterHook);
+
+  var cb = el._enterCb = once(function () {
+    if (expectsCSS) {
+      removeTransitionClass(el, toClass);
+      removeTransitionClass(el, activeClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, startClass);
+      }
+      enterCancelledHook && enterCancelledHook(el);
+    } else {
+      afterEnterHook && afterEnterHook(el);
+    }
+    el._enterCb = null;
+  });
+
+  if (!vnode.data.show) {
+    // remove pending leave element on enter by injecting an insert hook
+    mergeVNodeHook(vnode, 'insert', function () {
+      var parent = el.parentNode;
+      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+      if (pendingNode &&
+        pendingNode.tag === vnode.tag &&
+        pendingNode.elm._leaveCb
+      ) {
+        pendingNode.elm._leaveCb();
+      }
+      enterHook && enterHook(el, cb);
+    });
+  }
+
+  // start enter transition
+  beforeEnterHook && beforeEnterHook(el);
+  if (expectsCSS) {
+    addTransitionClass(el, startClass);
+    addTransitionClass(el, activeClass);
+    nextFrame(function () {
+      removeTransitionClass(el, startClass);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
+        }
+      }
+    });
+  }
+
+  if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
+    enterHook && enterHook(el, cb);
+  }
+
+  if (!expectsCSS && !userWantsControl) {
+    cb();
+  }
+}
+
+function leave (vnode, rm) {
+  var el = vnode.elm;
+
+  // call enter callback now
+  if (isDef(el._enterCb)) {
+    el._enterCb.cancelled = true;
+    el._enterCb();
+  }
+
+  var data = resolveTransition(vnode.data.transition);
+  if (isUndef(data) || el.nodeType !== 1) {
+    return rm()
+  }
+
+  /* istanbul ignore if */
+  if (isDef(el._leaveCb)) {
+    return
+  }
+
+  var css = data.css;
+  var type = data.type;
+  var leaveClass = data.leaveClass;
+  var leaveToClass = data.leaveToClass;
+  var leaveActiveClass = data.leaveActiveClass;
+  var beforeLeave = data.beforeLeave;
+  var leave = data.leave;
+  var afterLeave = data.afterLeave;
+  var leaveCancelled = data.leaveCancelled;
+  var delayLeave = data.delayLeave;
+  var duration = data.duration;
+
+  var expectsCSS = css !== false && !isIE9;
+  var userWantsControl = getHookArgumentsLength(leave);
+
+  var explicitLeaveDuration = toNumber(
+    isObject(duration)
+      ? duration.leave
+      : duration
+  );
+
+  if (isDef(explicitLeaveDuration)) {
+    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  }
+
+  var cb = el._leaveCb = once(function () {
+    if (el.parentNode && el.parentNode._pending) {
+      el.parentNode._pending[vnode.key] = null;
+    }
+    if (expectsCSS) {
+      removeTransitionClass(el, leaveToClass);
+      removeTransitionClass(el, leaveActiveClass);
+    }
+    if (cb.cancelled) {
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveClass);
+      }
+      leaveCancelled && leaveCancelled(el);
+    } else {
+      rm();
+      afterLeave && afterLeave(el);
+    }
+    el._leaveCb = null;
+  });
+
+  if (delayLeave) {
+    delayLeave(performLeave);
+  } else {
+    performLeave();
+  }
+
+  function performLeave () {
+    // the delayed leave may have already been cancelled
+    if (cb.cancelled) {
+      return
+    }
+    // record leaving element
+    if (!vnode.data.show && el.parentNode) {
+      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+    }
+    beforeLeave && beforeLeave(el);
+    if (expectsCSS) {
+      addTransitionClass(el, leaveClass);
+      addTransitionClass(el, leaveActiveClass);
+      nextFrame(function () {
+        removeTransitionClass(el, leaveClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
+    }
+    leave && leave(el, cb);
+    if (!expectsCSS && !userWantsControl) {
+      cb();
+    }
+  }
+}
+
+// only used in dev mode
+function checkDuration (val, name, vnode) {
+  if (typeof val !== 'number') {
+    warn(
+      "<transition> explicit " + name + " duration is not a valid number - " +
+      "got " + (JSON.stringify(val)) + ".",
+      vnode.context
+    );
+  } else if (isNaN(val)) {
+    warn(
+      "<transition> explicit " + name + " duration is NaN - " +
+      'the duration expression might be incorrect.',
+      vnode.context
+    );
+  }
+}
+
+function isValidDuration (val) {
+  return typeof val === 'number' && !isNaN(val)
+}
+
+/**
+ * Normalize a transition hook's argument length. The hook may be:
+ * - a merged hook (invoker) with the original in .fns
+ * - a wrapped component method (check ._length)
+ * - a plain function (.length)
+ */
+function getHookArgumentsLength (fn) {
+  if (isUndef(fn)) {
+    return false
+  }
+  var invokerFns = fn.fns;
+  if (isDef(invokerFns)) {
+    // invoker
+    return getHookArgumentsLength(
+      Array.isArray(invokerFns)
+        ? invokerFns[0]
+        : invokerFns
+    )
+  } else {
+    return (fn._length || fn.length) > 1
+  }
+}
+
+function _enter (_, vnode) {
+  if (vnode.data.show !== true) {
+    enter(vnode);
+  }
+}
+
+var transition = inBrowser ? {
+  create: _enter,
+  activate: _enter,
+  remove: function remove$$1 (vnode, rm) {
+    /* istanbul ignore else */
+    if (vnode.data.show !== true) {
+      leave(vnode, rm);
+    } else {
+      rm();
+    }
+  }
+} : {};
+
+var platformModules = [
+  attrs,
+  klass,
+  events,
+  domProps,
+  style,
+  transition
+];
+
+/*  */
+
+// the directive module should be applied last, after all
+// built-in modules have been applied.
+var modules = platformModules.concat(baseModules);
+
+var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+
+/**
+ * Not type checking this file because flow doesn't like attaching
+ * properties to Elements.
+ */
+
+/* istanbul ignore if */
+if (isIE9) {
+  // http://www.matts411.com/post/internet-explorer-9-oninput/
+  document.addEventListener('selectionchange', function () {
+    var el = document.activeElement;
+    if (el && el.vmodel) {
+      trigger(el, 'input');
+    }
+  });
+}
+
+var directive = {
+  inserted: function inserted (el, binding, vnode, oldVnode) {
+    if (vnode.tag === 'select') {
+      // #6903
+      if (oldVnode.elm && !oldVnode.elm._vOptions) {
+        mergeVNodeHook(vnode, 'postpatch', function () {
+          directive.componentUpdated(el, binding, vnode);
+        });
+      } else {
+        setSelected(el, binding, vnode.context);
+      }
+      el._vOptions = [].map.call(el.options, getValue);
+    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
+        // Safari < 10.2 & UIWebView doesn't fire compositionend when
+        // switching focus before confirming composition choice
+        // this also fixes the issue where some browsers e.g. iOS Chrome
+        // fires "change" instead of "input" on autocomplete.
+        el.addEventListener('change', onCompositionEnd);
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
+      }
+    }
+  },
+
+  componentUpdated: function componentUpdated (el, binding, vnode) {
+    if (vnode.tag === 'select') {
+      setSelected(el, binding, vnode.context);
+      // in case the options rendered by v-for have changed,
+      // it's possible that the value is out-of-sync with the rendered options.
+      // detect such cases and filter out values that no longer has a matching
+      // option in the DOM.
+      var prevOptions = el._vOptions;
+      var curOptions = el._vOptions = [].map.call(el.options, getValue);
+      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+        // trigger change event if
+        // no matching option found for at least one value
+        var needReset = el.multiple
+          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+        if (needReset) {
+          trigger(el, 'change');
+        }
+      }
+    }
+  }
+};
+
+function setSelected (el, binding, vm) {
+  actuallySetSelected(el, binding, vm);
+  /* istanbul ignore if */
+  if (isIE || isEdge) {
+    setTimeout(function () {
+      actuallySetSelected(el, binding, vm);
+    }, 0);
+  }
+}
+
+function actuallySetSelected (el, binding, vm) {
+  var value = binding.value;
+  var isMultiple = el.multiple;
+  if (isMultiple && !Array.isArray(value)) {
+    warn(
+      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+      vm
+    );
+    return
+  }
+  var selected, option;
+  for (var i = 0, l = el.options.length; i < l; i++) {
+    option = el.options[i];
+    if (isMultiple) {
+      selected = looseIndexOf(value, getValue(option)) > -1;
+      if (option.selected !== selected) {
+        option.selected = selected;
+      }
+    } else {
+      if (looseEqual(getValue(option), value)) {
+        if (el.selectedIndex !== i) {
+          el.selectedIndex = i;
+        }
+        return
+      }
+    }
+  }
+  if (!isMultiple) {
+    el.selectedIndex = -1;
+  }
+}
+
+function hasNoMatchingOption (value, options) {
+  return options.every(function (o) { return !looseEqual(o, value); })
+}
+
+function getValue (option) {
+  return '_value' in option
+    ? option._value
+    : option.value
+}
+
+function onCompositionStart (e) {
+  e.target.composing = true;
+}
+
+function onCompositionEnd (e) {
+  // prevent triggering an input event for no reason
+  if (!e.target.composing) { return }
+  e.target.composing = false;
+  trigger(e.target, 'input');
+}
+
+function trigger (el, type) {
+  var e = document.createEvent('HTMLEvents');
+  e.initEvent(type, true, true);
+  el.dispatchEvent(e);
+}
+
+/*  */
+
+// recursively search for possible transition defined inside the component root
+function locateNode (vnode) {
+  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+    ? locateNode(vnode.componentInstance._vnode)
+    : vnode
+}
+
+var show = {
+  bind: function bind (el, ref, vnode) {
+    var value = ref.value;
+
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
+    if (value && transition$$1) {
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
+    }
+  },
+
+  update: function update (el, ref, vnode) {
+    var value = ref.value;
+    var oldValue = ref.oldValue;
+
+    /* istanbul ignore if */
+    if (!value === !oldValue) { return }
+    vnode = locateNode(vnode);
+    var transition$$1 = vnode.data && vnode.data.transition;
+    if (transition$$1) {
+      vnode.data.show = true;
+      if (value) {
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
+      } else {
+        leave(vnode, function () {
+          el.style.display = 'none';
+        });
+      }
+    } else {
+      el.style.display = value ? el.__vOriginalDisplay : 'none';
+    }
+  },
+
+  unbind: function unbind (
+    el,
+    binding,
+    vnode,
+    oldVnode,
+    isDestroy
+  ) {
+    if (!isDestroy) {
+      el.style.display = el.__vOriginalDisplay;
+    }
+  }
+};
+
+var platformDirectives = {
+  model: directive,
+  show: show
+};
+
+/*  */
+
+var transitionProps = {
+  name: String,
+  appear: Boolean,
+  css: Boolean,
+  mode: String,
+  type: String,
+  enterClass: String,
+  leaveClass: String,
+  enterToClass: String,
+  leaveToClass: String,
+  enterActiveClass: String,
+  leaveActiveClass: String,
+  appearClass: String,
+  appearActiveClass: String,
+  appearToClass: String,
+  duration: [Number, String, Object]
+};
+
+// in case the child is also an abstract component, e.g. <keep-alive>
+// we want to recursively retrieve the real component to be rendered
+function getRealChild (vnode) {
+  var compOptions = vnode && vnode.componentOptions;
+  if (compOptions && compOptions.Ctor.options.abstract) {
+    return getRealChild(getFirstComponentChild(compOptions.children))
+  } else {
+    return vnode
+  }
+}
+
+function extractTransitionData (comp) {
+  var data = {};
+  var options = comp.$options;
+  // props
+  for (var key in options.propsData) {
+    data[key] = comp[key];
+  }
+  // events.
+  // extract listeners and pass them directly to the transition methods
+  var listeners = options._parentListeners;
+  for (var key$1 in listeners) {
+    data[camelize(key$1)] = listeners[key$1];
+  }
+  return data
+}
+
+function placeholder (h, rawChild) {
+  if (/\d-keep-alive$/.test(rawChild.tag)) {
+    return h('keep-alive', {
+      props: rawChild.componentOptions.propsData
+    })
+  }
+}
+
+function hasParentTransition (vnode) {
+  while ((vnode = vnode.parent)) {
+    if (vnode.data.transition) {
+      return true
+    }
+  }
+}
+
+function isSameChild (child, oldChild) {
+  return oldChild.key === child.key && oldChild.tag === child.tag
+}
+
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
+  name: 'transition',
+  props: transitionProps,
+  abstract: true,
+
+  render: function render (h) {
+    var this$1 = this;
+
+    var children = this.$slots.default;
+    if (!children) {
+      return
+    }
+
+    // filter out text nodes (possible whitespaces)
+    children = children.filter(isNotTextNode);
+    /* istanbul ignore if */
+    if (!children.length) {
+      return
+    }
+
+    // warn multiple elements
+    if (children.length > 1) {
+      warn(
+        '<transition> can only be used on a single element. Use ' +
+        '<transition-group> for lists.',
+        this.$parent
+      );
+    }
+
+    var mode = this.mode;
+
+    // warn invalid mode
+    if (mode && mode !== 'in-out' && mode !== 'out-in'
+    ) {
+      warn(
+        'invalid <transition> mode: ' + mode,
+        this.$parent
+      );
+    }
+
+    var rawChild = children[0];
+
+    // if this is a component root node and the component's
+    // parent container node also has transition, skip.
+    if (hasParentTransition(this.$vnode)) {
+      return rawChild
+    }
+
+    // apply transition data to child
+    // use getRealChild() to ignore abstract components e.g. keep-alive
+    var child = getRealChild(rawChild);
+    /* istanbul ignore if */
+    if (!child) {
+      return rawChild
+    }
+
+    if (this._leaving) {
+      return placeholder(h, rawChild)
+    }
+
+    // ensure a key that is unique to the vnode type and to this transition
+    // component instance. This key will be used to remove pending leaving nodes
+    // during entering.
+    var id = "__transition-" + (this._uid) + "-";
+    child.key = child.key == null
+      ? child.isComment
+        ? id + 'comment'
+        : id + child.tag
+      : isPrimitive(child.key)
+        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+        : child.key;
+
+    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+    var oldRawChild = this._vnode;
+    var oldChild = getRealChild(oldRawChild);
+
+    // mark v-show
+    // so that the transition module can hand over the control to the directive
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+      child.data.show = true;
+    }
+
+    if (
+      oldChild &&
+      oldChild.data &&
+      !isSameChild(child, oldChild) &&
+      !isAsyncPlaceholder(oldChild) &&
+      // #6687 component root is a comment node
+      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+    ) {
+      // replace old child transition data with fresh one
+      // important for dynamic transitions!
+      var oldData = oldChild.data.transition = extend({}, data);
+      // handle transition mode
+      if (mode === 'out-in') {
+        // return placeholder node and queue update when leave finishes
+        this._leaving = true;
+        mergeVNodeHook(oldData, 'afterLeave', function () {
+          this$1._leaving = false;
+          this$1.$forceUpdate();
+        });
+        return placeholder(h, rawChild)
+      } else if (mode === 'in-out') {
+        if (isAsyncPlaceholder(child)) {
+          return oldRawChild
+        }
+        var delayedLeave;
+        var performLeave = function () { delayedLeave(); };
+        mergeVNodeHook(data, 'afterEnter', performLeave);
+        mergeVNodeHook(data, 'enterCancelled', performLeave);
+        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
+      }
+    }
+
+    return rawChild
+  }
+};
+
+/*  */
+
+var props = extend({
+  tag: String,
+  moveClass: String
+}, transitionProps);
+
+delete props.mode;
+
+var TransitionGroup = {
+  props: props,
+
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
+  render: function render (h) {
+    var tag = this.tag || this.$vnode.data.tag || 'span';
+    var map = Object.create(null);
+    var prevChildren = this.prevChildren = this.children;
+    var rawChildren = this.$slots.default || [];
+    var children = this.children = [];
+    var transitionData = extractTransitionData(this);
+
+    for (var i = 0; i < rawChildren.length; i++) {
+      var c = rawChildren[i];
+      if (c.tag) {
+        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+          children.push(c);
+          map[c.key] = c
+          ;(c.data || (c.data = {})).transition = transitionData;
+        } else {
+          var opts = c.componentOptions;
+          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+          warn(("<transition-group> children must be keyed: <" + name + ">"));
+        }
+      }
+    }
+
+    if (prevChildren) {
+      var kept = [];
+      var removed = [];
+      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+        var c$1 = prevChildren[i$1];
+        c$1.data.transition = transitionData;
+        c$1.data.pos = c$1.elm.getBoundingClientRect();
+        if (map[c$1.key]) {
+          kept.push(c$1);
+        } else {
+          removed.push(c$1);
+        }
+      }
+      this.kept = h(tag, null, kept);
+      this.removed = removed;
+    }
+
+    return h(tag, null, children)
+  },
+
+  updated: function updated () {
+    var children = this.prevChildren;
+    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+      return
+    }
+
+    // we divide the work into three loops to avoid mixing DOM reads and writes
+    // in each iteration - which helps prevent layout thrashing.
+    children.forEach(callPendingCbs);
+    children.forEach(recordPosition);
+    children.forEach(applyTranslation);
+
+    // force reflow to put everything in position
+    // assign to this to avoid being removed in tree-shaking
+    // $flow-disable-line
+    this._reflow = document.body.offsetHeight;
+
+    children.forEach(function (c) {
+      if (c.data.moved) {
+        var el = c.elm;
+        var s = el.style;
+        addTransitionClass(el, moveClass);
+        s.transform = s.WebkitTransform = s.transitionDuration = '';
+        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
+          if (!e || /transform$/.test(e.propertyName)) {
+            el.removeEventListener(transitionEndEvent, cb);
+            el._moveCb = null;
+            removeTransitionClass(el, moveClass);
+          }
+        });
+      }
+    });
+  },
+
+  methods: {
+    hasMove: function hasMove (el, moveClass) {
+      /* istanbul ignore if */
+      if (!hasTransition) {
+        return false
+      }
+      /* istanbul ignore if */
+      if (this._hasMove) {
+        return this._hasMove
+      }
+      // Detect whether an element with the move class applied has
+      // CSS transitions. Since the element may be inside an entering
+      // transition at this very moment, we make a clone of it and remove
+      // all other transition classes applied to ensure only the move class
+      // is applied.
+      var clone = el.cloneNode();
+      if (el._transitionClasses) {
+        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+      }
+      addClass(clone, moveClass);
+      clone.style.display = 'none';
+      this.$el.appendChild(clone);
+      var info = getTransitionInfo(clone);
+      this.$el.removeChild(clone);
+      return (this._hasMove = info.hasTransform)
+    }
+  }
+};
+
+function callPendingCbs (c) {
+  /* istanbul ignore if */
+  if (c.elm._moveCb) {
+    c.elm._moveCb();
+  }
+  /* istanbul ignore if */
+  if (c.elm._enterCb) {
+    c.elm._enterCb();
+  }
+}
+
+function recordPosition (c) {
+  c.data.newPos = c.elm.getBoundingClientRect();
+}
+
+function applyTranslation (c) {
+  var oldPos = c.data.pos;
+  var newPos = c.data.newPos;
+  var dx = oldPos.left - newPos.left;
+  var dy = oldPos.top - newPos.top;
+  if (dx || dy) {
+    c.data.moved = true;
+    var s = c.elm.style;
+    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+    s.transitionDuration = '0s';
+  }
+}
+
+var platformComponents = {
+  Transition: Transition,
+  TransitionGroup: TransitionGroup
+};
+
+/*  */
+
+// install platform specific utils
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
+
+// install platform runtime directives & components
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
+
+// install platform patch function
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+// public mount method
+Vue.prototype.$mount = function (
+  el,
+  hydrating
+) {
+  el = el && inBrowser ? query(el) : undefined;
+  return mountComponent(this, el, hydrating)
+};
+
+// devtools global hook
+/* istanbul ignore next */
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
+      console[console.info ? 'info' : 'log'](
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
+      );
+    }
+  }, 0);
+}
+
+/*  */
+
+module.exports = Vue;
diff --git a/dist/vue.runtime.common.js b/dist/vue.runtime.common.js
index 84f38f8ec5e..07ddaa2ccba 100644
--- a/dist/vue.runtime.common.js
+++ b/dist/vue.runtime.common.js
@@ -1,7923 +1,5 @@
-/*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
- * Released under the MIT License.
- */
-'use strict';
-
-/*  */
-
-var emptyObject = Object.freeze({});
-
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-function isUndef (v) {
-  return v === undefined || v === null
-}
-
-function isDef (v) {
-  return v !== undefined && v !== null
-}
-
-function isTrue (v) {
-  return v === true
-}
-
-function isFalse (v) {
-  return v === false
-}
-
-/**
- * Check if value is primitive
- */
-function isPrimitive (value) {
-  return (
-    typeof value === 'string' ||
-    typeof value === 'number' ||
-    // $flow-disable-line
-    typeof value === 'symbol' ||
-    typeof value === 'boolean'
-  )
-}
-
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
-
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
-
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
-
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
-
-function isRegExp (v) {
-  return _toString.call(v) === '[object RegExp]'
-}
-
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
-
-/**
- * Convert a value to a string that is actually rendered.
- */
-function toString (val) {
-  return val == null
-    ? ''
-    : typeof val === 'object'
-      ? JSON.stringify(val, null, 2)
-      : String(val)
-}
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-function toNumber (val) {
-  var n = parseFloat(val);
-  return isNaN(n) ? val : n
-}
-
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
-
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
-
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
-  }
-}
-
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
-
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
-
-/**
- * Capitalize a string.
- */
-var capitalize = cached(function (str) {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
-
-/**
- * Hyphenate a camelCase string.
- */
-var hyphenateRE = /\B([A-Z])/g;
-var hyphenate = cached(function (str) {
-  return str.replace(hyphenateRE, '-$1').toLowerCase()
-});
-
-/**
- * Simple bind, faster than native
- */
-function bind (fn, ctx) {
-  function boundFn (a) {
-    var l = arguments.length;
-    return l
-      ? l > 1
-        ? fn.apply(ctx, arguments)
-        : fn.call(ctx, a)
-      : fn.call(ctx)
-  }
-  // record original fn length
-  boundFn._length = fn.length;
-  return boundFn
-}
-
-/**
- * Convert an Array-like object to a real Array.
- */
-function toArray (list, start) {
-  start = start || 0;
-  var i = list.length - start;
-  var ret = new Array(i);
-  while (i--) {
-    ret[i] = list[i + start];
-  }
-  return ret
-}
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
-  }
-  return to
-}
-
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  var res = {};
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i]) {
-      extend(res, arr[i]);
-    }
-  }
-  return res
-}
-
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
-
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
-
-/**
- * Generate a static keys string from compiler modules.
- */
-
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-function looseEqual (a, b) {
-  if (a === b) { return true }
-  var isObjectA = isObject(a);
-  var isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      var isArrayA = Array.isArray(a);
-      var isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every(function (e, i) {
-          return looseEqual(e, b[i])
-        })
-      } else if (!isArrayA && !isArrayB) {
-        var keysA = Object.keys(a);
-        var keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(function (key) {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
-      }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
-    }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
-  }
-}
-
-function looseIndexOf (arr, val) {
-  for (var i = 0; i < arr.length; i++) {
-    if (looseEqual(arr[i], val)) { return i }
-  }
-  return -1
-}
-
-/**
- * Ensure a function is called only once.
- */
-function once (fn) {
-  var called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-var SSR_ATTR = 'data-server-rendered';
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
-  /**
-   * Option merge strategies (used in core/util/options)
-   */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
-
-  /**
-   * Whether to suppress warnings.
-   */
-  silent: false,
-
-  /**
-   * Show production mode tip message on boot?
-   */
-  productionTip: process.env.NODE_ENV !== 'production',
-
-  /**
-   * Whether to enable devtools
-   */
-  devtools: process.env.NODE_ENV !== 'production',
-
-  /**
-   * Whether to record perf
-   */
-  performance: false,
-
-  /**
-   * Error handler for watcher errors
-   */
-  errorHandler: null,
-
-  /**
-   * Warn handler for watcher warns
-   */
-  warnHandler: null,
-
-  /**
-   * Ignore certain custom elements
-   */
-  ignoredElements: [],
-
-  /**
-   * Custom user key aliases for v-on
-   */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
-
-  /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
-   */
-  isReservedTag: no,
-
-  /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
-   */
-  isReservedAttr: no,
-
-  /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
-   */
-  isUnknownElement: no,
-
-  /**
-   * Get the namespace of an element
-   */
-  getTagNamespace: noop,
-
-  /**
-   * Parse the real tag name for the specific platform.
-   */
-  parsePlatformTagName: identity,
-
-  /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
-   */
-  mustUseProp: no,
-
-  /**
-   * Exposed for legacy reasons
-   */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
-
-/*  */
-
-/**
- * Check if a string starts with $ or _
- */
-function isReserved (str) {
-  var c = (str + '').charCodeAt(0);
-  return c === 0x24 || c === 0x5F
-}
-
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
-/**
- * Parse simple path.
- */
-var bailRE = /[^\w.$]/;
-function parsePath (path) {
-  if (bailRE.test(path)) {
-    return
-  }
-  var segments = path.split('.');
-  return function (obj) {
-    for (var i = 0; i < segments.length; i++) {
-      if (!obj) { return }
-      obj = obj[segments[i]];
-    }
-    return obj
-  }
-}
-
-/*  */
-
-
-// can we use __proto__?
-var hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
-
-var supportsPassive = false;
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        supportsPassive = true;
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
-    }
-  }
-  return _isServer
-};
-
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
-
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
-
-var _Set;
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  _Set = Set;
-} else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
-    function Set () {
-      this.set = Object.create(null);
-    }
-    Set.prototype.has = function has (key) {
-      return this.set[key] === true
-    };
-    Set.prototype.add = function add (key) {
-      this.set[key] = true;
-    };
-    Set.prototype.clear = function clear () {
-      this.set = Object.create(null);
-    };
-
-    return Set;
-  }());
-}
-
-/*  */
-
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
-
-if (process.env.NODE_ENV !== 'production') {
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
-
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
-
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
-    }
-  };
-
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
-    }
-  };
-
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
-    }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
-    }
-
-    return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
-    )
-  };
-
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
-    }
-    return res
-  };
-
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
-        }
-        tree.push(vm);
-        vm = vm.$parent;
-      }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
-    }
-  };
-}
-
-/*  */
-
-
-var uid$1 = 0;
-
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid$1++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-var targetStack = [];
-
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
-}
-
-function popTarget () {
-  Dep.target = targetStack.pop();
-}
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-var createEmptyVNode = function (text) {
-  if ( text === void 0 ) text = '';
-
-  var node = new VNode();
-  node.text = text;
-  node.isComment = true;
-  return node
-};
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
-  var cloned = new VNode(
-    vnode.tag,
-    vnode.data,
-    vnode.children,
-    vnode.text,
-    vnode.elm,
-    vnode.context,
-    componentOptions,
-    vnode.asyncFactory
-  );
-  cloned.ns = vnode.ns;
-  cloned.isStatic = vnode.isStatic;
-  cloned.key = vnode.key;
-  cloned.isComment = vnode.isComment;
-  cloned.fnContext = vnode.fnContext;
-  cloned.fnOptions = vnode.fnOptions;
-  cloned.fnScopeId = vnode.fnScopeId;
-  cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
-  return cloned
-}
-
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
-
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
-
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
-    }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
-
-/*  */
-
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
-
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
-
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
-  }
-};
-
-// helpers
-
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
-
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
-          }
-        }
-      }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
-      }
-      /* eslint-enable no-self-compare */
-      if (process.env.NODE_ENV !== 'production' && customSetter) {
-        customSetter();
-      }
-      if (setter) {
-        setter.call(obj, newVal);
-      } else {
-        val = newVal;
-      }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
-    }
-  });
-}
-
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
-  }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
-  }
-  if (!ob) {
-    target[key] = val;
-    return val
-  }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
-
-/**
- * Delete a property and trigger change if necessary.
- */
-function del (target, key) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.splice(key, 1);
-    return
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      'Avoid deleting properties on a Vue instance or its root $data ' +
-      '- just set it to null.'
-    );
-    return
-  }
-  if (!hasOwn(target, key)) {
-    return
-  }
-  delete target[key];
-  if (!ob) {
-    return
-  }
-  ob.dep.notify();
-}
-
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
-    }
-  }
-}
-
-/*  */
-
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
-
-/**
- * Options with restrictions
- */
-if (process.env.NODE_ENV !== 'production') {
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
-      warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
-      );
-    }
-    return defaultStrat(parent, child)
-  };
-}
-
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
-    }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
-      } else {
-        return defaultData
-      }
-    }
-  }
-}
-
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      process.env.NODE_ENV !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
-
-      return parentVal
-    }
-    return mergeDataOrFn(parentVal, childVal)
-  }
-
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
-
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
-  }
-}
-
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
-
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
-  if (process.env.NODE_ENV !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && process.env.NODE_ENV !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (var key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-    warn(
-      'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
-    );
-  }
-  if (isBuiltInTag(name) || config.isReservedTag(name)) {
-    warn(
-      'Do not use built-in or reserved HTML elements as component ' +
-      'id: ' + name
-    );
-  }
-}
-
-/**
- * Ensure all props option syntax are normalized into the
- * Object-based format.
- */
-function normalizeProps (options, vm) {
-  var props = options.props;
-  if (!props) { return }
-  var res = {};
-  var i, val, name;
-  if (Array.isArray(props)) {
-    i = props.length;
-    while (i--) {
-      val = props[i];
-      if (typeof val === 'string') {
-        name = camelize(val);
-        res[name] = { type: null };
-      } else if (process.env.NODE_ENV !== 'production') {
-        warn('props must be strings when using array syntax.');
-      }
-    }
-  } else if (isPlainObject(props)) {
-    for (var key in props) {
-      val = props[key];
-      name = camelize(key);
-      res[name] = isPlainObject(val)
-        ? val
-        : { type: val };
-    }
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn(
-      "Invalid value for option \"props\": expected an Array or an Object, " +
-      "but got " + (toRawType(props)) + ".",
-      vm
-    );
-  }
-  options.props = res;
-}
-
-/**
- * Normalize all injections into Object-based format
- */
-function normalizeInject (options, vm) {
-  var inject = options.inject;
-  if (!inject) { return }
-  var normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (var i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (var key in inject) {
-      var val = inject[key];
-      normalized[key] = isPlainObject(val)
-        ? extend({ from: key }, val)
-        : { from: val };
-    }
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn(
-      "Invalid value for option \"inject\": expected an Array or an Object, " +
-      "but got " + (toRawType(inject)) + ".",
-      vm
-    );
-  }
-}
-
-/**
- * Normalize raw function directives into object format.
- */
-function normalizeDirectives (options) {
-  var dirs = options.directives;
-  if (dirs) {
-    for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
-      }
-    }
-  }
-}
-
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
-  }
-}
-
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-function mergeOptions (
-  parent,
-  child,
-  vm
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    checkComponents(child);
-  }
-
-  if (typeof child === 'function') {
-    child = child.options;
-  }
-
-  normalizeProps(child, vm);
-  normalizeInject(child, vm);
-  normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
-    }
-  }
-  var options = {};
-  var key;
-  for (key in parent) {
-    mergeField(key);
-  }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
-    }
-  }
-  function mergeField (key) {
-    var strat = strats[key] || defaultStrat;
-    options[key] = strat(parent[key], child[key], vm, key);
-  }
-  return options
-}
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-function resolveAsset (
-  options,
-  type,
-  id,
-  warnMissing
-) {
-  /* istanbul ignore if */
-  if (typeof id !== 'string') {
-    return
-  }
-  var assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) { return assets[id] }
-  var camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-  var PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-  // fallback to prototype chain
-  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
-    warn(
-      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-      options
-    );
-  }
-  return res
-}
-
-/*  */
-
-function validateProp (
-  key,
-  propOptions,
-  propsData,
-  vm
-) {
-  var prop = propOptions[key];
-  var absent = !hasOwn(propsData, key);
-  var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
-    if (absent && !hasOwn(prop, 'default')) {
-      value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
-    }
-  }
-  // check default value
-  if (value === undefined) {
-    value = getPropDefaultValue(vm, prop, key);
-    // since the default value is a fresh copy,
-    // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
-    observe(value);
-    observerState.shouldConvert = prevShouldConvert;
-  }
-  if (
-    process.env.NODE_ENV !== 'production' &&
-    // skip validation for weex recycle-list child component props
-    !(false && isObject(value) && ('@binding' in value))
-  ) {
-    assertProp(prop, key, value, vm, absent);
-  }
-  return value
-}
-
-/**
- * Get the default value of a prop.
- */
-function getPropDefaultValue (vm, prop, key) {
-  // no default, return undefined
-  if (!hasOwn(prop, 'default')) {
-    return undefined
-  }
-  var def = prop.default;
-  // warn against non-factory defaults for Object & Array
-  if (process.env.NODE_ENV !== 'production' && isObject(def)) {
-    warn(
-      'Invalid default value for prop "' + key + '": ' +
-      'Props with type Object/Array must use a factory function ' +
-      'to return the default value.',
-      vm
-    );
-  }
-  // the raw prop value was also undefined from previous render,
-  // return previous default value to avoid unnecessary watcher trigger
-  if (vm && vm.$options.propsData &&
-    vm.$options.propsData[key] === undefined &&
-    vm._props[key] !== undefined
-  ) {
-    return vm._props[key]
-  }
-  // call factory function for non-Function types
-  // a value is Function if its prototype is function even across different execution context
-  return typeof def === 'function' && getType(prop.type) !== 'Function'
-    ? def.call(vm)
-    : def
-}
-
-/**
- * Assert whether a prop is valid.
- */
-function assertProp (
-  prop,
-  name,
-  value,
-  vm,
-  absent
-) {
-  if (prop.required && absent) {
-    warn(
-      'Missing required prop: "' + name + '"',
-      vm
-    );
-    return
-  }
-  if (value == null && !prop.required) {
-    return
-  }
-  var type = prop.type;
-  var valid = !type || type === true;
-  var expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
-    }
-    for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
-    }
-  }
-  if (!valid) {
-    warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
-      vm
-    );
-    return
-  }
-  var validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
-    }
-  }
-}
-
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
-
-function assertType (value, type) {
-  var valid;
-  var expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    var t = typeof value;
-    valid = t === expectedType.toLowerCase();
-    // for primitive wrapper objects
-    if (!valid && t === 'object') {
-      valid = value instanceof type;
-    }
-  } else if (expectedType === 'Object') {
-    valid = isPlainObject(value);
-  } else if (expectedType === 'Array') {
-    valid = Array.isArray(value);
-  } else {
-    valid = value instanceof type;
-  }
-  return {
-    valid: valid,
-    expectedType: expectedType
-  }
-}
-
-/**
- * Use function string name to check built-in types,
- * because a simple equality check will fail when running
- * across different vms / iframes.
- */
-function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
-  return match ? match[1] : ''
-}
-
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
-  }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
-    }
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
-        }
-      }
-    }
-  }
-  globalHandleError(err, vm, info);
-}
-
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
-    }
-  }
-  logError(err, vm, info);
-}
-
-function logError (err, vm, info) {
-  if (process.env.NODE_ENV !== 'production') {
-    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
-  }
-  /* istanbul ignore else */
-  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
-    console.error(err);
-  } else {
-    throw err
-  }
-}
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-var pending = false;
-
-function flushCallbacks () {
-  pending = false;
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./vue.runtime.common.prod.js')
 } else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  var p = Promise.resolve();
-  microTimerFunc = function () {
-    p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
-    // it can get stuck in a weird state where callbacks are pushed into the
-    // microtask queue but the queue isn't being flushed, until the browser
-    // needs to do some other work, e.g. handle a timer. Therefore we can
-    // "force" the microtask queue to be flushed by adding an empty timer.
-    if (isIOS) { setTimeout(noop); }
-  };
-} else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
-}
-
-function nextTick (cb, ctx) {
-  var _resolve;
-  callbacks.push(function () {
-    if (cb) {
-      try {
-        cb.call(ctx);
-      } catch (e) {
-        handleError(e, ctx, 'nextTick');
-      }
-    } else if (_resolve) {
-      _resolve(ctx);
-    }
-  });
-  if (!pending) {
-    pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
-  }
-  // $flow-disable-line
-  if (!cb && typeof Promise !== 'undefined') {
-    return new Promise(function (resolve) {
-      _resolve = resolve;
-    })
-  }
-}
-
-/*  */
-
-/* not type checking this file because flow doesn't play well with Proxy */
-
-var initProxy;
-
-if (process.env.NODE_ENV !== 'production') {
-  var allowedGlobals = makeMap(
-    'Infinity,undefined,NaN,isFinite,isNaN,' +
-    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-    'require' // for Webpack/Browserify
-  );
-
-  var warnNonPresent = function (target, key) {
-    warn(
-      "Property or method \"" + key + "\" is not defined on the instance but " +
-      'referenced during render. Make sure that this property is reactive, ' +
-      'either in the data option, or for class-based components, by ' +
-      'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
-      target
-    );
-  };
-
-  var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
-
-  if (hasProxy) {
-    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      set: function set (target, key, value) {
-        if (isBuiltInModifier(key)) {
-          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-          return false
-        } else {
-          target[key] = value;
-          return true
-        }
-      }
-    });
-  }
-
-  var hasHandler = {
-    has: function has (target, key) {
-      var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
-      if (!has && !isAllowed) {
-        warnNonPresent(target, key);
-      }
-      return has || !isAllowed
-    }
-  };
-
-  var getHandler = {
-    get: function get (target, key) {
-      if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
-      }
-      return target[key]
-    }
-  };
-
-  initProxy = function initProxy (vm) {
-    if (hasProxy) {
-      // determine which proxy handler to use
-      var options = vm.$options;
-      var handlers = options.render && options.render._withStripped
-        ? getHandler
-        : hasHandler;
-      vm._renderProxy = new Proxy(vm, handlers);
-    } else {
-      vm._renderProxy = vm;
-    }
-  };
-}
-
-/*  */
-
-var seenObjects = new _Set();
-
-/**
- * Recursively traverse an object to evoke all converted
- * getters, so that every nested property inside the object
- * is collected as a "deep" dependency.
- */
-function traverse (val) {
-  _traverse(val, seenObjects);
-  seenObjects.clear();
-}
-
-function _traverse (val, seen) {
-  var i, keys;
-  var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
-    return
-  }
-  if (val.__ob__) {
-    var depId = val.__ob__.dep.id;
-    if (seen.has(depId)) {
-      return
-    }
-    seen.add(depId);
-  }
-  if (isA) {
-    i = val.length;
-    while (i--) { _traverse(val[i], seen); }
-  } else {
-    keys = Object.keys(val);
-    i = keys.length;
-    while (i--) { _traverse(val[keys[i]], seen); }
-  }
-}
-
-var mark;
-var measure;
-
-if (process.env.NODE_ENV !== 'production') {
-  var perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    mark = function (tag) { return perf.mark(tag); };
-    measure = function (name, startTag, endTag) {
-      perf.measure(name, startTag, endTag);
-      perf.clearMarks(startTag);
-      perf.clearMarks(endTag);
-      perf.clearMeasures(name);
-    };
-  }
-}
-
-/*  */
-
-var normalizeEvent = cached(function (name) {
-  var passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  var capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name: name,
-    once: once$$1,
-    capture: capture,
-    passive: passive
-  }
-});
-
-function createFnInvoker (fns) {
-  function invoker () {
-    var arguments$1 = arguments;
-
-    var fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      var cloned = fns.slice();
-      for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
-      }
-    } else {
-      // return handler return value for single handlers
-      return fns.apply(null, arguments)
-    }
-  }
-  invoker.fns = fns;
-  return invoker
-}
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, def, cur, old, event;
-  for (name in on) {
-    def = cur = on[name];
-    old = oldOn[name];
-    event = normalizeEvent(name);
-    /* istanbul ignore if */
-    if (isUndef(cur)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
-        vm
-      );
-    } else if (isUndef(old)) {
-      if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
-      }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
-    } else if (cur !== old) {
-      old.fns = cur;
-      on[name] = old;
-    }
-  }
-  for (name in oldOn) {
-    if (isUndef(on[name])) {
-      event = normalizeEvent(name);
-      remove$$1(event.name, oldOn[name], event.capture);
-    }
-  }
-}
-
-/*  */
-
-function mergeVNodeHook (def, hookKey, hook) {
-  if (def instanceof VNode) {
-    def = def.data.hook || (def.data.hook = {});
-  }
-  var invoker;
-  var oldHook = def[hookKey];
-
-  function wrappedHook () {
-    hook.apply(this, arguments);
-    // important: remove merged hook to ensure it's called only once
-    // and prevent memory leak
-    remove(invoker.fns, wrappedHook);
-  }
-
-  if (isUndef(oldHook)) {
-    // no existing hook
-    invoker = createFnInvoker([wrappedHook]);
-  } else {
-    /* istanbul ignore if */
-    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
-      // already a merged invoker
-      invoker = oldHook;
-      invoker.fns.push(wrappedHook);
-    } else {
-      // existing plain hook
-      invoker = createFnInvoker([oldHook, wrappedHook]);
-    }
-  }
-
-  invoker.merged = true;
-  def[hookKey] = invoker;
-}
-
-/*  */
-
-function extractPropsFromVNodeData (
-  data,
-  Ctor,
-  tag
-) {
-  // we are only extracting raw values here.
-  // validation and default values are handled in the child
-  // component itself.
-  var propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
-  }
-  var res = {};
-  var attrs = data.attrs;
-  var props = data.props;
-  if (isDef(attrs) || isDef(props)) {
-    for (var key in propOptions) {
-      var altKey = hyphenate(key);
-      if (process.env.NODE_ENV !== 'production') {
-        var keyInLowerCase = key.toLowerCase();
-        if (
-          key !== keyInLowerCase &&
-          attrs && hasOwn(attrs, keyInLowerCase)
-        ) {
-          tip(
-            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-            " \"" + key + "\". " +
-            "Note that HTML attributes are case-insensitive and camelCased " +
-            "props need to use their kebab-case equivalents when using in-DOM " +
-            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
-          );
-        }
-      }
-      checkProp(res, props, key, altKey, true) ||
-      checkProp(res, attrs, key, altKey, false);
-    }
-  }
-  return res
-}
-
-function checkProp (
-  res,
-  hash,
-  key,
-  altKey,
-  preserve
-) {
-  if (isDef(hash)) {
-    if (hasOwn(hash, key)) {
-      res[key] = hash[key];
-      if (!preserve) {
-        delete hash[key];
-      }
-      return true
-    } else if (hasOwn(hash, altKey)) {
-      res[key] = hash[altKey];
-      if (!preserve) {
-        delete hash[altKey];
-      }
-      return true
-    }
-  }
-  return false
-}
-
-/*  */
-
-// The template compiler attempts to minimize the need for normalization by
-// statically analyzing the template at compile time.
-//
-// For plain HTML markup, normalization can be completely skipped because the
-// generated render function is guaranteed to return Array<VNode>. There are
-// two cases where extra normalization is needed:
-
-// 1. When the children contains components - because a functional component
-// may return an Array instead of a single root. In this case, just a simple
-// normalization is needed - if any child is an Array, we flatten the whole
-// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-// because functional components already normalize their own children.
-function simpleNormalizeChildren (children) {
-  for (var i = 0; i < children.length; i++) {
-    if (Array.isArray(children[i])) {
-      return Array.prototype.concat.apply([], children)
-    }
-  }
-  return children
-}
-
-// 2. When the children contains constructs that always generated nested Arrays,
-// e.g. <template>, <slot>, v-for, or when the children is provided by user
-// with hand-written render functions / JSX. In such cases a full normalization
-// is needed to cater to all possible types of children values.
-function normalizeChildren (children) {
-  return isPrimitive(children)
-    ? [createTextVNode(children)]
-    : Array.isArray(children)
-      ? normalizeArrayChildren(children)
-      : undefined
-}
-
-function isTextNode (node) {
-  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
-}
-
-function normalizeArrayChildren (children, nestedIndex) {
-  var res = [];
-  var i, c, lastIndex, last;
-  for (i = 0; i < children.length; i++) {
-    c = children[i];
-    if (isUndef(c) || typeof c === 'boolean') { continue }
-    lastIndex = res.length - 1;
-    last = res[lastIndex];
-    //  nested
-    if (Array.isArray(c)) {
-      if (c.length > 0) {
-        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-        // merge adjacent text nodes
-        if (isTextNode(c[0]) && isTextNode(last)) {
-          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-          c.shift();
-        }
-        res.push.apply(res, c);
-      }
-    } else if (isPrimitive(c)) {
-      if (isTextNode(last)) {
-        // merge adjacent text nodes
-        // this is necessary for SSR hydration because text nodes are
-        // essentially merged when rendered to HTML strings
-        res[lastIndex] = createTextVNode(last.text + c);
-      } else if (c !== '') {
-        // convert primitive to vnode
-        res.push(createTextVNode(c));
-      }
-    } else {
-      if (isTextNode(c) && isTextNode(last)) {
-        // merge adjacent text nodes
-        res[lastIndex] = createTextVNode(last.text + c.text);
-      } else {
-        // default key for nested array children (likely generated by v-for)
-        if (isTrue(children._isVList) &&
-          isDef(c.tag) &&
-          isUndef(c.key) &&
-          isDef(nestedIndex)) {
-          c.key = "__vlist" + nestedIndex + "_" + i + "__";
-        }
-        res.push(c);
-      }
-    }
-  }
-  return res
-}
-
-/*  */
-
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
-
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-var target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    if (process.env.NODE_ENV !== 'production') {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
-      }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
-
-
-
-/**
- * Runtime helper for resolving raw children VNodes into a slot object.
- */
-function resolveSlots (
-  children,
-  context
-) {
-  var slots = {};
-  if (!children) {
-    return slots
-  }
-  for (var i = 0, l = children.length; i < l; i++) {
-    var child = children[i];
-    var data = child.data;
-    // remove slot attribute if the node is resolved as a Vue slot node
-    if (data && data.attrs && data.attrs.slot) {
-      delete data.attrs.slot;
-    }
-    // named slots should only be respected if the vnode was rendered in the
-    // same context.
-    if ((child.context === context || child.fnContext === context) &&
-      data && data.slot != null
-    ) {
-      var name = data.slot;
-      var slot = (slots[name] || (slots[name] = []));
-      if (child.tag === 'template') {
-        slot.push.apply(slot, child.children || []);
-      } else {
-        slot.push(child);
-      }
-    } else {
-      (slots.default || (slots.default = [])).push(child);
-    }
-  }
-  // ignore slots that contains only whitespace
-  for (var name$1 in slots) {
-    if (slots[name$1].every(isWhitespace)) {
-      delete slots[name$1];
-    }
-  }
-  return slots
-}
-
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
-
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var activeInstance = null;
-var isUpdatingChildComponent = false;
-
-function initLifecycle (vm) {
-  var options = vm.$options;
-
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
-    }
-    parent.$children.push(vm);
-  }
-
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
-
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
-}
-
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
-
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
-
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
-    }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
-    }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
-    }
-  };
-}
-
-function mountComponent (
-  vm,
-  el,
-  hydrating
-) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    if (process.env.NODE_ENV !== 'production') {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
-      }
-    }
-  }
-  callHook(vm, 'beforeMount');
-
-  var updateComponent;
-  /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
-  } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
-  }
-
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
-  }
-  return vm
-}
-
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = true;
-  }
-
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
-
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
-
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
-
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
-
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
-
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
-
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = false;
-  }
-}
-
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
-  }
-  return false
-}
-
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
-
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
-
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
-      }
-    }
-  }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
-
-/*  */
-
-
-var MAX_UPDATE_COUNT = 100;
-
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
-
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  if (process.env.NODE_ENV !== 'production') {
-    circular = {};
-  }
-  waiting = flushing = false;
-}
-
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
-
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
-        );
-        break
-      }
-    }
-  }
-
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
-
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
-  }
-}
-
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
-  }
-}
-
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
-  }
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
-      }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
-    }
-  }
-}
-
-/*  */
-
-var uid$2 = 0;
-
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
-) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
-  }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
-  } else {
-    this.deep = this.user = this.lazy = this.sync = false;
-  }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = process.env.NODE_ENV !== 'production'
-    ? expOrFn.toString()
-    : '';
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
-  } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
-    }
-  }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
-
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
-    } else {
-      throw e
-    }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    popTarget();
-    this.cleanupDeps();
-  }
-  return value
-};
-
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
-    }
-  }
-};
-
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
-
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
-    }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
-
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
-  } else {
-    queueWatcher(this);
-  }
-};
-
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
-      } else {
-        this.cb.call(this.vm, value, oldValue);
-      }
-    }
-  }
-};
-
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
-
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
-
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
-  }
-};
-
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
-
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
-    }
-    this.active = false;
-  }
-};
-
-/*  */
-
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
-
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
-  }
-}
-
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
-        }
-      });
-    } else {
-      defineReactive(props, key, value);
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
-    }
-  };
-
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
-}
-
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
-      }
-    }
-    if (props && hasOwn(props, key)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
-    }
-  }
-  // observe data
-  observe(data, true /* asRootData */);
-}
-
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
-  }
-}
-
-var computedWatcherOptions = { lazy: true };
-
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
-
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (process.env.NODE_ENV !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
-    }
-
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
-    }
-
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else if (process.env.NODE_ENV !== 'production') {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
-    }
-  }
-}
-
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
-    }
-  }
-}
-
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
-      }
-    }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
-  }
-}
-
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
-      }
-    } else {
-      createWatcher(vm, key, handler);
-    }
-  }
-}
-
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
-}
-
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
-  }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
-
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
-
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
-    }
-    return function unwatchFn () {
-      watcher.teardown();
-    }
-  };
-}
-
-/*  */
-
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
-
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
-      } else {
-        defineReactive(vm, key, result[key]);
-      }
-    });
-    observerState.shouldConvert = true;
-  }
-}
-
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
-
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
-      }
-    }
-    return result
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
-        );
-      }
-      slotNodes._rendered = true;
-    }
-    nodes = slotNodes || fallback;
-  }
-
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
-
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
-
-      for (var key in value) loop( key );
-    }
-  }
-  return data
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
-
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
-
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
-    }
-  } else {
-    markStaticNode(tree, key, isOnce);
-  }
-}
-
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
-
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
-/*  */
-
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
-      }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
-    }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
-  }
-
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
-
-  var vnode = options.render.call(null, renderContext._c, renderContext);
-
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
-    }
-  }
-
-  return vnode
-}
-
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
-  }
-}
-
-/*  */
-
-
-
-
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
-
-
-// Updates the state of the component to weex native render engine.
-
-/*  */
-
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
-
-// listening on native callback
-
-/*  */
-
-/*  */
-
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  },
-
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  }
-};
-
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  var baseCtor = context.$options._base;
-
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
-
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
-    }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
-    }
-  }
-
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
-
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
-
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
-
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
-  }
-
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
-
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
-
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
-    }
-  }
-
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
-
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
-
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
-
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
-}
-
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
-
-/*  */
-
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
-
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
-  }
-  return _createElement(context, tag, data, children, normalizationType)
-}
-
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
-  }
-  // warn against non-primitive key
-  if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
-    }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
-    }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  } else {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, null, true);
-  }
-}
-
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
-
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
-
-  Vue.prototype._render = function () {
-    var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
-
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
-    }
-
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      } else {
-        vnode = vm._vnode;
-      }
-    }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
-    }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
-  };
-}
-
-/*  */
-
-var uid = 0;
-
-function initMixin (Vue) {
-  Vue.prototype._init = function (options) {
-    var vm = this;
-    // a uid
-    vm._uid = uid++;
-
-    var startTag, endTag;
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-      startTag = "vue-perf-start:" + (vm._uid);
-      endTag = "vue-perf-end:" + (vm._uid);
-      mark(startTag);
-    }
-
-    // a flag to avoid this being observed
-    vm._isVue = true;
-    // merge options
-    if (options && options._isComponent) {
-      // optimize internal component instantiation
-      // since dynamic options merging is pretty slow, and none of the
-      // internal component options needs special treatment.
-      initInternalComponent(vm, options);
-    } else {
-      vm.$options = mergeOptions(
-        resolveConstructorOptions(vm.constructor),
-        options || {},
-        vm
-      );
-    }
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      initProxy(vm);
-    } else {
-      vm._renderProxy = vm;
-    }
-    // expose real self
-    vm._self = vm;
-    initLifecycle(vm);
-    initEvents(vm);
-    initRender(vm);
-    callHook(vm, 'beforeCreate');
-    initInjections(vm); // resolve injections before data/props
-    initState(vm);
-    initProvide(vm); // resolve provide after data/props
-    callHook(vm, 'created');
-
-    /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-      vm._name = formatComponentName(vm, false);
-      mark(endTag);
-      measure(("vue " + (vm._name) + " init"), startTag, endTag);
-    }
-
-    if (vm.$options.el) {
-      vm.$mount(vm.$options.el);
-    }
-  };
-}
-
-function initInternalComponent (vm, options) {
-  var opts = vm.$options = Object.create(vm.constructor.options);
-  // doing this because it's faster than dynamic enumeration.
-  var parentVnode = options._parentVnode;
-  opts.parent = options.parent;
-  opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
-
-  var vnodeComponentOptions = parentVnode.componentOptions;
-  opts.propsData = vnodeComponentOptions.propsData;
-  opts._parentListeners = vnodeComponentOptions.listeners;
-  opts._renderChildren = vnodeComponentOptions.children;
-  opts._componentTag = vnodeComponentOptions.tag;
-
-  if (options.render) {
-    opts.render = options.render;
-    opts.staticRenderFns = options.staticRenderFns;
-  }
-}
-
-function resolveConstructorOptions (Ctor) {
-  var options = Ctor.options;
-  if (Ctor.super) {
-    var superOptions = resolveConstructorOptions(Ctor.super);
-    var cachedSuperOptions = Ctor.superOptions;
-    if (superOptions !== cachedSuperOptions) {
-      // super option changed,
-      // need to resolve new options.
-      Ctor.superOptions = superOptions;
-      // check if there are any late-modified/attached options (#4976)
-      var modifiedOptions = resolveModifiedOptions(Ctor);
-      // update base extend options
-      if (modifiedOptions) {
-        extend(Ctor.extendOptions, modifiedOptions);
-      }
-      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-      if (options.name) {
-        options.components[options.name] = Ctor;
-      }
-    }
-  }
-  return options
-}
-
-function resolveModifiedOptions (Ctor) {
-  var modified;
-  var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
-  var sealed = Ctor.sealedOptions;
-  for (var key in latest) {
-    if (latest[key] !== sealed[key]) {
-      if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-    }
-  }
-  return modified
-}
-
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
-  if (process.env.NODE_ENV !== 'production' &&
-    !(this instanceof Vue$3)
-  ) {
-    warn('Vue is a constructor and should be called with the `new` keyword');
-  }
-  this._init(options);
-}
-
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
-
-/*  */
-
-function initUse (Vue) {
-  Vue.use = function (plugin) {
-    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-    if (installedPlugins.indexOf(plugin) > -1) {
-      return this
-    }
-
-    // additional parameters
-    var args = toArray(arguments, 1);
-    args.unshift(this);
-    if (typeof plugin.install === 'function') {
-      plugin.install.apply(plugin, args);
-    } else if (typeof plugin === 'function') {
-      plugin.apply(null, args);
-    }
-    installedPlugins.push(plugin);
-    return this
-  };
-}
-
-/*  */
-
-function initMixin$1 (Vue) {
-  Vue.mixin = function (mixin) {
-    this.options = mergeOptions(this.options, mixin);
-    return this
-  };
-}
-
-/*  */
-
-function initExtend (Vue) {
-  /**
-   * Each instance constructor, including Vue, has a unique
-   * cid. This enables us to create wrapped "child
-   * constructors" for prototypal inheritance and cache them.
-   */
-  Vue.cid = 0;
-  var cid = 1;
-
-  /**
-   * Class inheritance
-   */
-  Vue.extend = function (extendOptions) {
-    extendOptions = extendOptions || {};
-    var Super = this;
-    var SuperId = Super.cid;
-    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-    if (cachedCtors[SuperId]) {
-      return cachedCtors[SuperId]
-    }
-
-    var name = extendOptions.name || Super.options.name;
-    if (process.env.NODE_ENV !== 'production' && name) {
-      validateComponentName(name);
-    }
-
-    var Sub = function VueComponent (options) {
-      this._init(options);
-    };
-    Sub.prototype = Object.create(Super.prototype);
-    Sub.prototype.constructor = Sub;
-    Sub.cid = cid++;
-    Sub.options = mergeOptions(
-      Super.options,
-      extendOptions
-    );
-    Sub['super'] = Super;
-
-    // For props and computed properties, we define the proxy getters on
-    // the Vue instances at extension time, on the extended prototype. This
-    // avoids Object.defineProperty calls for each instance created.
-    if (Sub.options.props) {
-      initProps$1(Sub);
-    }
-    if (Sub.options.computed) {
-      initComputed$1(Sub);
-    }
-
-    // allow further extension/mixin/plugin usage
-    Sub.extend = Super.extend;
-    Sub.mixin = Super.mixin;
-    Sub.use = Super.use;
-
-    // create asset registers, so extended classes
-    // can have their private assets too.
-    ASSET_TYPES.forEach(function (type) {
-      Sub[type] = Super[type];
-    });
-    // enable recursive self-lookup
-    if (name) {
-      Sub.options.components[name] = Sub;
-    }
-
-    // keep a reference to the super options at extension time.
-    // later at instantiation we can check if Super's options have
-    // been updated.
-    Sub.superOptions = Super.options;
-    Sub.extendOptions = extendOptions;
-    Sub.sealedOptions = extend({}, Sub.options);
-
-    // cache constructor
-    cachedCtors[SuperId] = Sub;
-    return Sub
-  };
-}
-
-function initProps$1 (Comp) {
-  var props = Comp.options.props;
-  for (var key in props) {
-    proxy(Comp.prototype, "_props", key);
-  }
-}
-
-function initComputed$1 (Comp) {
-  var computed = Comp.options.computed;
-  for (var key in computed) {
-    defineComputed(Comp.prototype, key, computed[key]);
-  }
-}
-
-/*  */
-
-function initAssetRegisters (Vue) {
-  /**
-   * Create asset registration methods.
-   */
-  ASSET_TYPES.forEach(function (type) {
-    Vue[type] = function (
-      id,
-      definition
-    ) {
-      if (!definition) {
-        return this.options[type + 's'][id]
-      } else {
-        /* istanbul ignore if */
-        if (process.env.NODE_ENV !== 'production' && type === 'component') {
-          validateComponentName(id);
-        }
-        if (type === 'component' && isPlainObject(definition)) {
-          definition.name = definition.name || id;
-          definition = this.options._base.extend(definition);
-        }
-        if (type === 'directive' && typeof definition === 'function') {
-          definition = { bind: definition, update: definition };
-        }
-        this.options[type + 's'][id] = definition;
-        return definition
-      }
-    };
-  });
-}
-
-/*  */
-
-function getComponentName (opts) {
-  return opts && (opts.Ctor.options.name || opts.tag)
-}
-
-function matches (pattern, name) {
-  if (Array.isArray(pattern)) {
-    return pattern.indexOf(name) > -1
-  } else if (typeof pattern === 'string') {
-    return pattern.split(',').indexOf(name) > -1
-  } else if (isRegExp(pattern)) {
-    return pattern.test(name)
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-function pruneCache (keepAliveInstance, filter) {
-  var cache = keepAliveInstance.cache;
-  var keys = keepAliveInstance.keys;
-  var _vnode = keepAliveInstance._vnode;
-  for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
-      if (name && !filter(name)) {
-        pruneCacheEntry(cache, key, keys, _vnode);
-      }
-    }
-  }
-}
-
-function pruneCacheEntry (
-  cache,
-  key,
-  keys,
-  current
-) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
-  }
-  cache[key] = null;
-  remove(keys, key);
-}
-
-var patternTypes = [String, RegExp, Array];
-
-var KeepAlive = {
-  name: 'keep-alive',
-  abstract: true,
-
-  props: {
-    include: patternTypes,
-    exclude: patternTypes,
-    max: [String, Number]
-  },
-
-  created: function created () {
-    this.cache = Object.create(null);
-    this.keys = [];
-  },
-
-  destroyed: function destroyed () {
-    var this$1 = this;
-
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
-    }
-  },
-
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
-  },
-
-  render: function render () {
-    var slot = this.$slots.default;
-    var vnode = getFirstComponentChild(slot);
-    var componentOptions = vnode && vnode.componentOptions;
-    if (componentOptions) {
-      // check pattern
-      var name = getComponentName(componentOptions);
-      var ref = this;
-      var include = ref.include;
-      var exclude = ref.exclude;
-      if (
-        // not included
-        (include && (!name || !matches(include, name))) ||
-        // excluded
-        (exclude && name && matches(exclude, name))
-      ) {
-        return vnode
-      }
-
-      var ref$1 = this;
-      var cache = ref$1.cache;
-      var keys = ref$1.keys;
-      var key = vnode.key == null
-        // same constructor may get registered as different local components
-        // so cid alone is not enough (#3269)
-        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
-        : vnode.key;
-      if (cache[key]) {
-        vnode.componentInstance = cache[key].componentInstance;
-        // make current key freshest
-        remove(keys, key);
-        keys.push(key);
-      } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
-      }
-
-      vnode.data.keepAlive = true;
-    }
-    return vnode || (slot && slot[0])
-  }
-};
-
-var builtInComponents = {
-  KeepAlive: KeepAlive
-};
-
-/*  */
-
-function initGlobalAPI (Vue) {
-  // config
-  var configDef = {};
-  configDef.get = function () { return config; };
-  if (process.env.NODE_ENV !== 'production') {
-    configDef.set = function () {
-      warn(
-        'Do not replace the Vue.config object, set individual fields instead.'
-      );
-    };
-  }
-  Object.defineProperty(Vue, 'config', configDef);
-
-  // exposed util methods.
-  // NOTE: these are not considered part of the public API - avoid relying on
-  // them unless you are aware of the risk.
-  Vue.util = {
-    warn: warn,
-    extend: extend,
-    mergeOptions: mergeOptions,
-    defineReactive: defineReactive
-  };
-
-  Vue.set = set;
-  Vue.delete = del;
-  Vue.nextTick = nextTick;
-
-  Vue.options = Object.create(null);
-  ASSET_TYPES.forEach(function (type) {
-    Vue.options[type + 's'] = Object.create(null);
-  });
-
-  // this is used to identify the "base" constructor to extend all plain-object
-  // components with in Weex's multi-instance scenarios.
-  Vue.options._base = Vue;
-
-  extend(Vue.options.components, builtInComponents);
-
-  initUse(Vue);
-  initMixin$1(Vue);
-  initExtend(Vue);
-  initAssetRegisters(Vue);
-}
-
-initGlobalAPI(Vue$3);
-
-Object.defineProperty(Vue$3.prototype, '$isServer', {
-  get: isServerRendering
-});
-
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
-  get: function get () {
-    /* istanbul ignore next */
-    return this.$vnode && this.$vnode.ssrContext
-  }
-});
-
-Vue$3.version = '2.5.13';
-
-/*  */
-
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
-
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
-
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
-
-var xlinkNS = 'http://www.w3.org/1999/xlink';
-
-var isXlink = function (name) {
-  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-};
-
-var getXlinkProp = function (name) {
-  return isXlink(name) ? name.slice(6, name.length) : ''
-};
-
-var isFalsyAttrValue = function (val) {
-  return val == null || val === false
-};
-
-/*  */
-
-function genClassForVnode (vnode) {
-  var data = vnode.data;
-  var parentNode = vnode;
-  var childNode = vnode;
-  while (isDef(childNode.componentInstance)) {
-    childNode = childNode.componentInstance._vnode;
-    if (childNode && childNode.data) {
-      data = mergeClassData(childNode.data, data);
-    }
-  }
-  while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode && parentNode.data) {
-      data = mergeClassData(data, parentNode.data);
-    }
-  }
-  return renderClass(data.staticClass, data.class)
-}
-
-function mergeClassData (child, parent) {
-  return {
-    staticClass: concat(child.staticClass, parent.staticClass),
-    class: isDef(child.class)
-      ? [child.class, parent.class]
-      : parent.class
-  }
-}
-
-function renderClass (
-  staticClass,
-  dynamicClass
-) {
-  if (isDef(staticClass) || isDef(dynamicClass)) {
-    return concat(staticClass, stringifyClass(dynamicClass))
-  }
-  /* istanbul ignore next */
-  return ''
-}
-
-function concat (a, b) {
-  return a ? b ? (a + ' ' + b) : a : (b || '')
-}
-
-function stringifyClass (value) {
-  if (Array.isArray(value)) {
-    return stringifyArray(value)
-  }
-  if (isObject(value)) {
-    return stringifyObject(value)
-  }
-  if (typeof value === 'string') {
-    return value
-  }
-  /* istanbul ignore next */
-  return ''
-}
-
-function stringifyArray (value) {
-  var res = '';
-  var stringified;
-  for (var i = 0, l = value.length; i < l; i++) {
-    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-      if (res) { res += ' '; }
-      res += stringified;
-    }
-  }
-  return res
-}
-
-function stringifyObject (value) {
-  var res = '';
-  for (var key in value) {
-    if (value[key]) {
-      if (res) { res += ' '; }
-      res += key;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var namespaceMap = {
-  svg: 'http://www.w3.org/2000/svg',
-  math: 'http://www.w3.org/1998/Math/MathML'
-};
-
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
-
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
-
-
-
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
-
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
-  }
-}
-
-var unknownElementCache = Object.create(null);
-function isUnknownElement (tag) {
-  /* istanbul ignore if */
-  if (!inBrowser) {
-    return true
-  }
-  if (isReservedTag(tag)) {
-    return false
-  }
-  tag = tag.toLowerCase();
-  /* istanbul ignore if */
-  if (unknownElementCache[tag] != null) {
-    return unknownElementCache[tag]
-  }
-  var el = document.createElement(tag);
-  if (tag.indexOf('-') > -1) {
-    // http://stackoverflow.com/a/28210364/1070244
-    return (unknownElementCache[tag] = (
-      el.constructor === window.HTMLUnknownElement ||
-      el.constructor === window.HTMLElement
-    ))
-  } else {
-    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
-  }
-}
-
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
-
-/*  */
-
-/**
- * Query an element selector if it's not an element already.
- */
-function query (el) {
-  if (typeof el === 'string') {
-    var selected = document.querySelector(el);
-    if (!selected) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'Cannot find element: ' + el
-      );
-      return document.createElement('div')
-    }
-    return selected
-  } else {
-    return el
-  }
-}
-
-/*  */
-
-function createElement$1 (tagName, vnode) {
-  var elm = document.createElement(tagName);
-  if (tagName !== 'select') {
-    return elm
-  }
-  // false or null will remove the attribute but undefined will not
-  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
-    elm.setAttribute('multiple', 'multiple');
-  }
-  return elm
-}
-
-function createElementNS (namespace, tagName) {
-  return document.createElementNS(namespaceMap[namespace], tagName)
-}
-
-function createTextNode (text) {
-  return document.createTextNode(text)
-}
-
-function createComment (text) {
-  return document.createComment(text)
-}
-
-function insertBefore (parentNode, newNode, referenceNode) {
-  parentNode.insertBefore(newNode, referenceNode);
-}
-
-function removeChild (node, child) {
-  node.removeChild(child);
-}
-
-function appendChild (node, child) {
-  node.appendChild(child);
-}
-
-function parentNode (node) {
-  return node.parentNode
-}
-
-function nextSibling (node) {
-  return node.nextSibling
-}
-
-function tagName (node) {
-  return node.tagName
-}
-
-function setTextContent (node, text) {
-  node.textContent = text;
-}
-
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
-}
-
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
-});
-
-/*  */
-
-var ref = {
-  create: function create (_, vnode) {
-    registerRef(vnode);
-  },
-  update: function update (oldVnode, vnode) {
-    if (oldVnode.data.ref !== vnode.data.ref) {
-      registerRef(oldVnode, true);
-      registerRef(vnode);
-    }
-  },
-  destroy: function destroy (vnode) {
-    registerRef(vnode, true);
-  }
-};
-
-function registerRef (vnode, isRemoval) {
-  var key = vnode.data.ref;
-  if (!key) { return }
-
-  var vm = vnode.context;
-  var ref = vnode.componentInstance || vnode.elm;
-  var refs = vm.$refs;
-  if (isRemoval) {
-    if (Array.isArray(refs[key])) {
-      remove(refs[key], ref);
-    } else if (refs[key] === ref) {
-      refs[key] = undefined;
-    }
-  } else {
-    if (vnode.data.refInFor) {
-      if (!Array.isArray(refs[key])) {
-        refs[key] = [ref];
-      } else if (refs[key].indexOf(ref) < 0) {
-        // $flow-disable-line
-        refs[key].push(ref);
-      }
-    } else {
-      refs[key] = ref;
-    }
-  }
-}
-
-/**
- * Virtual DOM patching algorithm based on Snabbdom by
- * Simon Friis Vindum (@paldepind)
- * Licensed under the MIT License
- * https://github.com/paldepind/snabbdom/blob/master/LICENSE
- *
- * modified by Evan You (@yyx990803)
- *
- * Not type-checking this because this file is perf-critical and the cost
- * of making flow understand it is not worth it.
- */
-
-var emptyNode = new VNode('', {}, []);
-
-var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
-
-function sameVnode (a, b) {
-  return (
-    a.key === b.key && (
-      (
-        a.tag === b.tag &&
-        a.isComment === b.isComment &&
-        isDef(a.data) === isDef(b.data) &&
-        sameInputType(a, b)
-      ) || (
-        isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
-        isUndef(b.asyncFactory.error)
-      )
-    )
-  )
-}
-
-function sameInputType (a, b) {
-  if (a.tag !== 'input') { return true }
-  var i;
-  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-}
-
-function createKeyToOldIdx (children, beginIdx, endIdx) {
-  var i, key;
-  var map = {};
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) { map[key] = i; }
-  }
-  return map
-}
-
-function createPatchFunction (backend) {
-  var i, j;
-  var cbs = {};
-
-  var modules = backend.modules;
-  var nodeOps = backend.nodeOps;
-
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (isDef(modules[j][hooks[i]])) {
-        cbs[hooks[i]].push(modules[j][hooks[i]]);
-      }
-    }
-  }
-
-  function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
-  }
-
-  function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
-        removeNode(childElm);
-      }
-    }
-    remove.listeners = listeners;
-    return remove
-  }
-
-  function removeNode (el) {
-    var parent = nodeOps.parentNode(el);
-    // element may have already been removed due to v-html / v-text
-    if (isDef(parent)) {
-      nodeOps.removeChild(parent, el);
-    }
-  }
-
-  function isUnknownElement$$1 (vnode, inVPre) {
-    return (
-      !inVPre &&
-      !vnode.ns &&
-      !(
-        config.ignoredElements.length &&
-        config.ignoredElements.some(function (ignore) {
-          return isRegExp(ignore)
-            ? ignore.test(vnode.tag)
-            : ignore === vnode.tag
-        })
-      ) &&
-      config.isUnknownElement(vnode.tag)
-    )
-  }
-
-  var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
-    vnode.isRootInsert = !nested; // for transition enter check
-    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
-      return
-    }
-
-    var data = vnode.data;
-    var children = vnode.children;
-    var tag = vnode.tag;
-    if (isDef(tag)) {
-      if (process.env.NODE_ENV !== 'production') {
-        if (data && data.pre) {
-          creatingElmInVPre++;
-        }
-        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
-          warn(
-            'Unknown custom element: <' + tag + '> - did you ' +
-            'register the component correctly? For recursive components, ' +
-            'make sure to provide the "name" option.',
-            vnode.context
-          );
-        }
-      }
-      vnode.elm = vnode.ns
-        ? nodeOps.createElementNS(vnode.ns, tag)
-        : nodeOps.createElement(tag, vnode);
-      setScope(vnode);
-
-      /* istanbul ignore if */
-      {
-        createChildren(vnode, children, insertedVnodeQueue);
-        if (isDef(data)) {
-          invokeCreateHooks(vnode, insertedVnodeQueue);
-        }
-        insert(parentElm, vnode.elm, refElm);
-      }
-
-      if (process.env.NODE_ENV !== 'production' && data && data.pre) {
-        creatingElmInVPre--;
-      }
-    } else if (isTrue(vnode.isComment)) {
-      vnode.elm = nodeOps.createComment(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    } else {
-      vnode.elm = nodeOps.createTextNode(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    }
-  }
-
-  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i = vnode.data;
-    if (isDef(i)) {
-      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
-      if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
-      }
-      // after calling the init hook, if the vnode is a child component
-      // it should've created a child instance and mounted it. the child
-      // component also has set the placeholder vnode's elm.
-      // in that case we can just return the element and be done.
-      if (isDef(vnode.componentInstance)) {
-        initComponent(vnode, insertedVnodeQueue);
-        if (isTrue(isReactivated)) {
-          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
-        }
-        return true
-      }
-    }
-  }
-
-  function initComponent (vnode, insertedVnodeQueue) {
-    if (isDef(vnode.data.pendingInsert)) {
-      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
-      vnode.data.pendingInsert = null;
-    }
-    vnode.elm = vnode.componentInstance.$el;
-    if (isPatchable(vnode)) {
-      invokeCreateHooks(vnode, insertedVnodeQueue);
-      setScope(vnode);
-    } else {
-      // empty component root.
-      // skip all element-related modules except for ref (#3455)
-      registerRef(vnode);
-      // make sure to invoke the insert hook
-      insertedVnodeQueue.push(vnode);
-    }
-  }
-
-  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i;
-    // hack for #4339: a reactivated component with inner transition
-    // does not trigger because the inner node's created hooks are not called
-    // again. It's not ideal to involve module-specific logic in here but
-    // there doesn't seem to be a better way to do it.
-    var innerNode = vnode;
-    while (innerNode.componentInstance) {
-      innerNode = innerNode.componentInstance._vnode;
-      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
-        for (i = 0; i < cbs.activate.length; ++i) {
-          cbs.activate[i](emptyNode, innerNode);
-        }
-        insertedVnodeQueue.push(innerNode);
-        break
-      }
-    }
-    // unlike a newly created component,
-    // a reactivated keep-alive component doesn't insert itself
-    insert(parentElm, vnode.elm, refElm);
-  }
-
-  function insert (parent, elm, ref$$1) {
-    if (isDef(parent)) {
-      if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
-          nodeOps.insertBefore(parent, elm, ref$$1);
-        }
-      } else {
-        nodeOps.appendChild(parent, elm);
-      }
-    }
-  }
-
-  function createChildren (vnode, children, insertedVnodeQueue) {
-    if (Array.isArray(children)) {
-      if (process.env.NODE_ENV !== 'production') {
-        checkDuplicateKeys(children);
-      }
-      for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
-      }
-    } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
-    }
-  }
-
-  function isPatchable (vnode) {
-    while (vnode.componentInstance) {
-      vnode = vnode.componentInstance._vnode;
-    }
-    return isDef(vnode.tag)
-  }
-
-  function invokeCreateHooks (vnode, insertedVnodeQueue) {
-    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-      cbs.create[i$1](emptyNode, vnode);
-    }
-    i = vnode.data.hook; // Reuse variable
-    if (isDef(i)) {
-      if (isDef(i.create)) { i.create(emptyNode, vnode); }
-      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
-    }
-  }
-
-  // set scope id attribute for scoped CSS.
-  // this is implemented as a special case to avoid the overhead
-  // of going through the normal attribute patching process.
-  function setScope (vnode) {
-    var i;
-    if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    } else {
-      var ancestor = vnode;
-      while (ancestor) {
-        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
-        }
-        ancestor = ancestor.parent;
-      }
-    }
-    // for slot content they should also get the scopeId from the host instance.
-    if (isDef(i = activeInstance) &&
-      i !== vnode.context &&
-      i !== vnode.fnContext &&
-      isDef(i = i.$options._scopeId)
-    ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    }
-  }
-
-  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
-    }
-  }
-
-  function invokeDestroyHook (vnode) {
-    var i, j;
-    var data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
-      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
-    }
-    if (isDef(i = vnode.children)) {
-      for (j = 0; j < vnode.children.length; ++j) {
-        invokeDestroyHook(vnode.children[j]);
-      }
-    }
-  }
-
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.tag)) {
-          removeAndInvokeRemoveHook(ch);
-          invokeDestroyHook(ch);
-        } else { // Text node
-          removeNode(ch.elm);
-        }
-      }
-    }
-  }
-
-  function removeAndInvokeRemoveHook (vnode, rm) {
-    if (isDef(rm) || isDef(vnode.data)) {
-      var i;
-      var listeners = cbs.remove.length + 1;
-      if (isDef(rm)) {
-        // we have a recursively passed down rm callback
-        // increase the listeners count
-        rm.listeners += listeners;
-      } else {
-        // directly removing
-        rm = createRmCb(vnode.elm, listeners);
-      }
-      // recursively invoke hooks on child component root node
-      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
-        removeAndInvokeRemoveHook(i, rm);
-      }
-      for (i = 0; i < cbs.remove.length; ++i) {
-        cbs.remove[i](vnode, rm);
-      }
-      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
-        i(vnode, rm);
-      } else {
-        rm();
-      }
-    } else {
-      removeNode(vnode.elm);
-    }
-  }
-
-  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
-    var oldStartIdx = 0;
-    var newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
-
-    // removeOnly is a special flag used only by <transition-group>
-    // to ensure removed elements stay in correct relative positions
-    // during leaving transitions
-    var canMove = !removeOnly;
-
-    if (process.env.NODE_ENV !== 'production') {
-      checkDuplicateKeys(newCh);
-    }
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-        oldEndVnode = oldCh[--oldEndIdx];
-      } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
-        oldStartVnode = oldCh[++oldStartIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else {
-        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
-        idxInOld = isDef(newStartVnode.key)
-          ? oldKeyToIdx[newStartVnode.key]
-          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
-        if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-        } else {
-          vnodeToMove = oldCh[idxInOld];
-          if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
-          } else {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-          }
-        }
-        newStartVnode = newCh[++newStartIdx];
-      }
-    }
-    if (oldStartIdx > oldEndIdx) {
-      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function checkDuplicateKeys (children) {
-    var seenKeys = {};
-    for (var i = 0; i < children.length; i++) {
-      var vnode = children[i];
-      var key = vnode.key;
-      if (isDef(key)) {
-        if (seenKeys[key]) {
-          warn(
-            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
-            vnode.context
-          );
-        } else {
-          seenKeys[key] = true;
-        }
-      }
-    }
-  }
-
-  function findIdxInOld (node, oldCh, start, end) {
-    for (var i = start; i < end; i++) {
-      var c = oldCh[i];
-      if (isDef(c) && sameVnode(node, c)) { return i }
-    }
-  }
-
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
-    if (oldVnode === vnode) {
-      return
-    }
-
-    var elm = vnode.elm = oldVnode.elm;
-
-    if (isTrue(oldVnode.isAsyncPlaceholder)) {
-      if (isDef(vnode.asyncFactory.resolved)) {
-        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
-      } else {
-        vnode.isAsyncPlaceholder = true;
-      }
-      return
-    }
-
-    // reuse element for static trees.
-    // note we only do this if the vnode is cloned -
-    // if the new node is not cloned it means the render functions have been
-    // reset by the hot-reload-api and we need to do a proper re-render.
-    if (isTrue(vnode.isStatic) &&
-      isTrue(oldVnode.isStatic) &&
-      vnode.key === oldVnode.key &&
-      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
-    ) {
-      vnode.componentInstance = oldVnode.componentInstance;
-      return
-    }
-
-    var i;
-    var data = vnode.data;
-    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-      i(oldVnode, vnode);
-    }
-
-    var oldCh = oldVnode.children;
-    var ch = vnode.children;
-    if (isDef(data) && isPatchable(vnode)) {
-      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
-      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
-    }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
-      } else if (isDef(ch)) {
-        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      } else if (isDef(oldVnode.text)) {
-        nodeOps.setTextContent(elm, '');
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      nodeOps.setTextContent(elm, vnode.text);
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
-    }
-  }
-
-  function invokeInsertHook (vnode, queue, initial) {
-    // delay insert hooks for component root nodes, invoke them after the
-    // element is really inserted
-    if (isTrue(initial) && isDef(vnode.parent)) {
-      vnode.parent.data.pendingInsert = queue;
-    } else {
-      for (var i = 0; i < queue.length; ++i) {
-        queue[i].data.hook.insert(queue[i]);
-      }
-    }
-  }
-
-  var hydrationBailed = false;
-  // list of modules that can skip create hook during hydration because they
-  // are already rendered on the client or has no need for initialization
-  // Note: style is excluded because it relies on initial clone for future
-  // deep updates (#7063).
-  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
-
-  // Note: this is a browser-only function so we can assume elms are DOM nodes.
-  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
-    var i;
-    var tag = vnode.tag;
-    var data = vnode.data;
-    var children = vnode.children;
-    inVPre = inVPre || (data && data.pre);
-    vnode.elm = elm;
-
-    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
-      vnode.isAsyncPlaceholder = true;
-      return true
-    }
-    // assert node match
-    if (process.env.NODE_ENV !== 'production') {
-      if (!assertNodeMatch(elm, vnode, inVPre)) {
-        return false
-      }
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
-      if (isDef(i = vnode.componentInstance)) {
-        // child component. it should have hydrated its own tree.
-        initComponent(vnode, insertedVnodeQueue);
-        return true
-      }
-    }
-    if (isDef(tag)) {
-      if (isDef(children)) {
-        // empty element, allow client to pick up and populate children
-        if (!elm.hasChildNodes()) {
-          createChildren(vnode, children, insertedVnodeQueue);
-        } else {
-          // v-html and domProps: innerHTML
-          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
-            if (i !== elm.innerHTML) {
-              /* istanbul ignore if */
-              if (process.env.NODE_ENV !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('server innerHTML: ', i);
-                console.warn('client innerHTML: ', elm.innerHTML);
-              }
-              return false
-            }
-          } else {
-            // iterate and compare children lists
-            var childrenMatch = true;
-            var childNode = elm.firstChild;
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
-                childrenMatch = false;
-                break
-              }
-              childNode = childNode.nextSibling;
-            }
-            // if childNode is not null, it means the actual childNodes list is
-            // longer than the virtual children list.
-            if (!childrenMatch || childNode) {
-              /* istanbul ignore if */
-              if (process.env.NODE_ENV !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
-              }
-              return false
-            }
-          }
-        }
-      }
-      if (isDef(data)) {
-        var fullInvoke = false;
-        for (var key in data) {
-          if (!isRenderedModule(key)) {
-            fullInvoke = true;
-            invokeCreateHooks(vnode, insertedVnodeQueue);
-            break
-          }
-        }
-        if (!fullInvoke && data['class']) {
-          // ensure collecting deps for deep class bindings for future updates
-          traverse(data['class']);
-        }
-      }
-    } else if (elm.data !== vnode.text) {
-      elm.data = vnode.text;
-    }
-    return true
-  }
-
-  function assertNodeMatch (node, vnode, inVPre) {
-    if (isDef(vnode.tag)) {
-      return vnode.tag.indexOf('vue-component') === 0 || (
-        !isUnknownElement$$1(vnode, inVPre) &&
-        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
-      )
-    } else {
-      return node.nodeType === (vnode.isComment ? 8 : 3)
-    }
-  }
-
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
-    if (isUndef(vnode)) {
-      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
-      return
-    }
-
-    var isInitialPatch = false;
-    var insertedVnodeQueue = [];
-
-    if (isUndef(oldVnode)) {
-      // empty mount (likely as component), create new root element
-      isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
-    } else {
-      var isRealElement = isDef(oldVnode.nodeType);
-      if (!isRealElement && sameVnode(oldVnode, vnode)) {
-        // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
-      } else {
-        if (isRealElement) {
-          // mounting to a real element
-          // check if this is server-rendered content and if we can perform
-          // a successful hydration.
-          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
-            oldVnode.removeAttribute(SSR_ATTR);
-            hydrating = true;
-          }
-          if (isTrue(hydrating)) {
-            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
-              invokeInsertHook(vnode, insertedVnodeQueue, true);
-              return oldVnode
-            } else if (process.env.NODE_ENV !== 'production') {
-              warn(
-                'The client-side rendered virtual DOM tree is not matching ' +
-                'server-rendered content. This is likely caused by incorrect ' +
-                'HTML markup, for example nesting block-level elements inside ' +
-                '<p>, or missing <tbody>. Bailing hydration and performing ' +
-                'full client-side render.'
-              );
-            }
-          }
-          // either not server-rendered, or hydration failed.
-          // create an empty node and replace it
-          oldVnode = emptyNodeAt(oldVnode);
-        }
-
-        // replacing existing element
-        var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
-
-        // create new node
-        createElm(
-          vnode,
-          insertedVnodeQueue,
-          // extremely rare edge case: do not insert if old element is in a
-          // leaving transition. Only happens when combining transition +
-          // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
-          nodeOps.nextSibling(oldElm)
-        );
-
-        // update parent placeholder node element, recursively
-        if (isDef(vnode.parent)) {
-          var ancestor = vnode.parent;
-          var patchable = isPatchable(vnode);
-          while (ancestor) {
-            for (var i = 0; i < cbs.destroy.length; ++i) {
-              cbs.destroy[i](ancestor);
-            }
-            ancestor.elm = vnode.elm;
-            if (patchable) {
-              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                cbs.create[i$1](emptyNode, ancestor);
-              }
-              // #6513
-              // invoke insert hooks that may have been merged by create hooks.
-              // e.g. for directives that uses the "inserted" hook.
-              var insert = ancestor.data.hook.insert;
-              if (insert.merged) {
-                // start at index 1 to avoid re-invoking component mounted hook
-                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
-                  insert.fns[i$2]();
-                }
-              }
-            } else {
-              registerRef(ancestor);
-            }
-            ancestor = ancestor.parent;
-          }
-        }
-
-        // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
-        } else if (isDef(oldVnode.tag)) {
-          invokeDestroyHook(oldVnode);
-        }
-      }
-    }
-
-    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
-    return vnode.elm
-  }
-}
-
-/*  */
-
-var directives = {
-  create: updateDirectives,
-  update: updateDirectives,
-  destroy: function unbindDirectives (vnode) {
-    updateDirectives(vnode, emptyNode);
-  }
-};
-
-function updateDirectives (oldVnode, vnode) {
-  if (oldVnode.data.directives || vnode.data.directives) {
-    _update(oldVnode, vnode);
-  }
-}
-
-function _update (oldVnode, vnode) {
-  var isCreate = oldVnode === emptyNode;
-  var isDestroy = vnode === emptyNode;
-  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
-
-  var dirsWithInsert = [];
-  var dirsWithPostpatch = [];
-
-  var key, oldDir, dir;
-  for (key in newDirs) {
-    oldDir = oldDirs[key];
-    dir = newDirs[key];
-    if (!oldDir) {
-      // new directive, bind
-      callHook$1(dir, 'bind', vnode, oldVnode);
-      if (dir.def && dir.def.inserted) {
-        dirsWithInsert.push(dir);
-      }
-    } else {
-      // existing directive, update
-      dir.oldValue = oldDir.value;
-      callHook$1(dir, 'update', vnode, oldVnode);
-      if (dir.def && dir.def.componentUpdated) {
-        dirsWithPostpatch.push(dir);
-      }
-    }
-  }
-
-  if (dirsWithInsert.length) {
-    var callInsert = function () {
-      for (var i = 0; i < dirsWithInsert.length; i++) {
-        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
-      }
-    };
-    if (isCreate) {
-      mergeVNodeHook(vnode, 'insert', callInsert);
-    } else {
-      callInsert();
-    }
-  }
-
-  if (dirsWithPostpatch.length) {
-    mergeVNodeHook(vnode, 'postpatch', function () {
-      for (var i = 0; i < dirsWithPostpatch.length; i++) {
-        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
-      }
-    });
-  }
-
-  if (!isCreate) {
-    for (key in oldDirs) {
-      if (!newDirs[key]) {
-        // no longer present, unbind
-        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
-      }
-    }
-  }
-}
-
-var emptyModifiers = Object.create(null);
-
-function normalizeDirectives$1 (
-  dirs,
-  vm
-) {
-  var res = Object.create(null);
-  if (!dirs) {
-    // $flow-disable-line
-    return res
-  }
-  var i, dir;
-  for (i = 0; i < dirs.length; i++) {
-    dir = dirs[i];
-    if (!dir.modifiers) {
-      // $flow-disable-line
-      dir.modifiers = emptyModifiers;
-    }
-    res[getRawDirName(dir)] = dir;
-    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
-  }
-  // $flow-disable-line
-  return res
-}
-
-function getRawDirName (dir) {
-  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
-}
-
-function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
-  var fn = dir.def && dir.def[hook];
-  if (fn) {
-    try {
-      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
-    } catch (e) {
-      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
-    }
-  }
-}
-
-var baseModules = [
-  ref,
-  directives
-];
-
-/*  */
-
-function updateAttrs (oldVnode, vnode) {
-  var opts = vnode.componentOptions;
-  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-    return
-  }
-  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-    return
-  }
-  var key, cur, old;
-  var elm = vnode.elm;
-  var oldAttrs = oldVnode.data.attrs || {};
-  var attrs = vnode.data.attrs || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(attrs.__ob__)) {
-    attrs = vnode.data.attrs = extend({}, attrs);
-  }
-
-  for (key in attrs) {
-    cur = attrs[key];
-    old = oldAttrs[key];
-    if (old !== cur) {
-      setAttr(elm, key, cur);
-    }
-  }
-  // #4391: in IE9, setting type can reset value for input[type=radio]
-  // #6666: IE/Edge forces progress value down to 1 before setting a max
-  /* istanbul ignore if */
-  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
-    setAttr(elm, 'value', attrs.value);
-  }
-  for (key in oldAttrs) {
-    if (isUndef(attrs[key])) {
-      if (isXlink(key)) {
-        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
-      } else if (!isEnumeratedAttr(key)) {
-        elm.removeAttribute(key);
-      }
-    }
-  }
-}
-
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
-    // set attribute for blank value
-    // e.g. <option disabled>Select one</option>
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // technically allowfullscreen is a boolean attribute for <iframe>,
-      // but Flash expects a value of "true" when used on <embed> tag
-      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
-        ? 'true'
-        : key;
-      el.setAttribute(key, value);
-    }
-  } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
-  } else if (isXlink(key)) {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
-    } else {
-      el.setAttributeNS(xlinkNS, key, value);
-    }
-  } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        var blocker = function (e) {
-          e.stopImmediatePropagation();
-          el.removeEventListener('input', blocker);
-        };
-        el.addEventListener('input', blocker);
-        // $flow-disable-line
-        el.__ieph = true; /* IE placeholder patched */
-      }
-      el.setAttribute(key, value);
-    }
-  }
-}
-
-var attrs = {
-  create: updateAttrs,
-  update: updateAttrs
-};
-
-/*  */
-
-function updateClass (oldVnode, vnode) {
-  var el = vnode.elm;
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-  if (
-    isUndef(data.staticClass) &&
-    isUndef(data.class) && (
-      isUndef(oldData) || (
-        isUndef(oldData.staticClass) &&
-        isUndef(oldData.class)
-      )
-    )
-  ) {
-    return
-  }
-
-  var cls = genClassForVnode(vnode);
-
-  // handle transition classes
-  var transitionClass = el._transitionClasses;
-  if (isDef(transitionClass)) {
-    cls = concat(cls, stringifyClass(transitionClass));
-  }
-
-  // set the class
-  if (cls !== el._prevClass) {
-    el.setAttribute('class', cls);
-    el._prevClass = cls;
-  }
-}
-
-var klass = {
-  create: updateClass,
-  update: updateClass
-};
-
-/*  */
-
-/*  */
-
-
-
-
-
-
-
-
-
-// add a raw attr (use this in preTransforms)
-
-
-
-
-
-
-
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-
-/*  */
-
-/**
- * Cross-platform code generation for component v-model
- */
-
-
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-
-/*  */
-
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
-var CHECKBOX_RADIO_TOKEN = '__c';
-
-/*  */
-
-// normalize v-model event tokens that can only be determined at runtime.
-// it's important to place the event as the first in the array because
-// the whole point is ensuring the v-model callback gets called before
-// user-attached handlers.
-function normalizeEvents (on) {
-  /* istanbul ignore if */
-  if (isDef(on[RANGE_TOKEN])) {
-    // IE input[type=range] only supports `change` event
-    var event = isIE ? 'change' : 'input';
-    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
-    delete on[RANGE_TOKEN];
-  }
-  // This was originally intended to fix #4521 but no longer necessary
-  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
-  /* istanbul ignore if */
-  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
-    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
-    delete on[CHECKBOX_RADIO_TOKEN];
-  }
-}
-
-var target$1;
-
-function createOnceHandler (handler, event, capture) {
-  var _target = target$1; // save current target element in closure
-  return function onceHandler () {
-    var res = handler.apply(null, arguments);
-    if (res !== null) {
-      remove$2(event, onceHandler, capture, _target);
-    }
-  }
-}
-
-function add$1 (
-  event,
-  handler,
-  once$$1,
-  capture,
-  passive
-) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
-  target$1.addEventListener(
-    event,
-    handler,
-    supportsPassive
-      ? { capture: capture, passive: passive }
-      : capture
-  );
-}
-
-function remove$2 (
-  event,
-  handler,
-  capture,
-  _target
-) {
-  (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
-    capture
-  );
-}
-
-function updateDOMListeners (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
-    return
-  }
-  var on = vnode.data.on || {};
-  var oldOn = oldVnode.data.on || {};
-  target$1 = vnode.elm;
-  normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
-  target$1 = undefined;
-}
-
-var events = {
-  create: updateDOMListeners,
-  update: updateDOMListeners
-};
-
-/*  */
-
-function updateDOMProps (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-    return
-  }
-  var key, cur;
-  var elm = vnode.elm;
-  var oldProps = oldVnode.data.domProps || {};
-  var props = vnode.data.domProps || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(props.__ob__)) {
-    props = vnode.data.domProps = extend({}, props);
-  }
-
-  for (key in oldProps) {
-    if (isUndef(props[key])) {
-      elm[key] = '';
-    }
-  }
-  for (key in props) {
-    cur = props[key];
-    // ignore children if the node has textContent or innerHTML,
-    // as these will throw away existing DOM nodes and cause removal errors
-    // on subsequent patches (#3360)
-    if (key === 'textContent' || key === 'innerHTML') {
-      if (vnode.children) { vnode.children.length = 0; }
-      if (cur === oldProps[key]) { continue }
-      // #6601 work around Chrome version <= 55 bug where single textNode
-      // replaced by innerHTML/textContent retains its parentNode property
-      if (elm.childNodes.length === 1) {
-        elm.removeChild(elm.childNodes[0]);
-      }
-    }
-
-    if (key === 'value') {
-      // store value as _value as well since
-      // non-string values will be stringified
-      elm._value = cur;
-      // avoid resetting cursor position when value is the same
-      var strCur = isUndef(cur) ? '' : String(cur);
-      if (shouldUpdateValue(elm, strCur)) {
-        elm.value = strCur;
-      }
-    } else {
-      elm[key] = cur;
-    }
-  }
-}
-
-// check platforms/web/util/attrs.js acceptValue
-
-
-function shouldUpdateValue (elm, checkVal) {
-  return (!elm.composing && (
-    elm.tagName === 'OPTION' ||
-    isNotInFocusAndDirty(elm, checkVal) ||
-    isDirtyWithModifiers(elm, checkVal)
-  ))
-}
-
-function isNotInFocusAndDirty (elm, checkVal) {
-  // return true when textbox (.number and .trim) loses focus and its value is
-  // not equal to the updated value
-  var notInFocus = true;
-  // #6157
-  // work around IE bug when accessing document.activeElement in an iframe
-  try { notInFocus = document.activeElement !== elm; } catch (e) {}
-  return notInFocus && elm.value !== checkVal
-}
-
-function isDirtyWithModifiers (elm, newVal) {
-  var value = elm.value;
-  var modifiers = elm._vModifiers; // injected by v-model runtime
-  if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
-    if (modifiers.number) {
-      return toNumber(value) !== toNumber(newVal)
-    }
-    if (modifiers.trim) {
-      return value.trim() !== newVal.trim()
-    }
-  }
-  return value !== newVal
-}
-
-var domProps = {
-  create: updateDOMProps,
-  update: updateDOMProps
-};
-
-/*  */
-
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
-    }
-  });
-  return res
-});
-
-// merge static and dynamic style data on the same vnode
-function normalizeStyleData (data) {
-  var style = normalizeStyleBinding(data.style);
-  // static style is pre-processed into an object during compilation
-  // and is always a fresh object, so it's safe to merge into it
-  return data.staticStyle
-    ? extend(data.staticStyle, style)
-    : style
-}
-
-// normalize possible array / string values into Object
-function normalizeStyleBinding (bindingStyle) {
-  if (Array.isArray(bindingStyle)) {
-    return toObject(bindingStyle)
-  }
-  if (typeof bindingStyle === 'string') {
-    return parseStyleText(bindingStyle)
-  }
-  return bindingStyle
-}
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-function getStyle (vnode, checkChild) {
-  var res = {};
-  var styleData;
-
-  if (checkChild) {
-    var childNode = vnode;
-    while (childNode.componentInstance) {
-      childNode = childNode.componentInstance._vnode;
-      if (
-        childNode && childNode.data &&
-        (styleData = normalizeStyleData(childNode.data))
-      ) {
-        extend(res, styleData);
-      }
-    }
-  }
-
-  if ((styleData = normalizeStyleData(vnode.data))) {
-    extend(res, styleData);
-  }
-
-  var parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
-    }
-  }
-  return res
-}
-
-/*  */
-
-var cssVarRE = /^--/;
-var importantRE = /\s*!important$/;
-var setProp = function (el, name, val) {
-  /* istanbul ignore if */
-  if (cssVarRE.test(name)) {
-    el.style.setProperty(name, val);
-  } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
-  } else {
-    var normalizedName = normalize(name);
-    if (Array.isArray(val)) {
-      // Support values array created by autoprefixer, e.g.
-      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
-      // Set them one by one, and the browser will only set those it can recognize
-      for (var i = 0, len = val.length; i < len; i++) {
-        el.style[normalizedName] = val[i];
-      }
-    } else {
-      el.style[normalizedName] = val;
-    }
-  }
-};
-
-var vendorNames = ['Webkit', 'Moz', 'ms'];
-
-var emptyStyle;
-var normalize = cached(function (prop) {
-  emptyStyle = emptyStyle || document.createElement('div').style;
-  prop = camelize(prop);
-  if (prop !== 'filter' && (prop in emptyStyle)) {
-    return prop
-  }
-  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-  for (var i = 0; i < vendorNames.length; i++) {
-    var name = vendorNames[i] + capName;
-    if (name in emptyStyle) {
-      return name
-    }
-  }
-});
-
-function updateStyle (oldVnode, vnode) {
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-
-  if (isUndef(data.staticStyle) && isUndef(data.style) &&
-    isUndef(oldData.staticStyle) && isUndef(oldData.style)
-  ) {
-    return
-  }
-
-  var cur, name;
-  var el = vnode.elm;
-  var oldStaticStyle = oldData.staticStyle;
-  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-  var oldStyle = oldStaticStyle || oldStyleBinding;
-
-  var style = normalizeStyleBinding(vnode.data.style) || {};
-
-  // store normalized style under a different key for next diff
-  // make sure to clone it if it's reactive, since the user likely wants
-  // to mutate it.
-  vnode.data.normalizedStyle = isDef(style.__ob__)
-    ? extend({}, style)
-    : style;
-
-  var newStyle = getStyle(vnode, true);
-
-  for (name in oldStyle) {
-    if (isUndef(newStyle[name])) {
-      setProp(el, name, '');
-    }
-  }
-  for (name in newStyle) {
-    cur = newStyle[name];
-    if (cur !== oldStyle[name]) {
-      // ie9 setting to null has no effect, must use empty string
-      setProp(el, name, cur == null ? '' : cur);
-    }
-  }
-}
-
-var style = {
-  create: updateStyle,
-  update: updateStyle
-};
-
-/*  */
-
-/**
- * Add class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function addClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
-
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
-    } else {
-      el.classList.add(cls);
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    if (cur.indexOf(' ' + cls + ' ') < 0) {
-      el.setAttribute('class', (cur + cls).trim());
-    }
-  }
-}
-
-/**
- * Remove class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function removeClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
-
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
-    } else {
-      el.classList.remove(cls);
-    }
-    if (!el.classList.length) {
-      el.removeAttribute('class');
-    }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    var tar = ' ' + cls + ' ';
-    while (cur.indexOf(tar) >= 0) {
-      cur = cur.replace(tar, ' ');
-    }
-    cur = cur.trim();
-    if (cur) {
-      el.setAttribute('class', cur);
-    } else {
-      el.removeAttribute('class');
-    }
-  }
-}
-
-/*  */
-
-function resolveTransition (def) {
-  if (!def) {
-    return
-  }
-  /* istanbul ignore else */
-  if (typeof def === 'object') {
-    var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
-    }
-    extend(res, def);
-    return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
-  }
-}
-
-var autoCssTransition = cached(function (name) {
-  return {
-    enterClass: (name + "-enter"),
-    enterToClass: (name + "-enter-to"),
-    enterActiveClass: (name + "-enter-active"),
-    leaveClass: (name + "-leave"),
-    leaveToClass: (name + "-leave-to"),
-    leaveActiveClass: (name + "-leave-active")
-  }
-});
-
-var hasTransition = inBrowser && !isIE9;
-var TRANSITION = 'transition';
-var ANIMATION = 'animation';
-
-// Transition property/event sniffing
-var transitionProp = 'transition';
-var transitionEndEvent = 'transitionend';
-var animationProp = 'animation';
-var animationEndEvent = 'animationend';
-if (hasTransition) {
-  /* istanbul ignore if */
-  if (window.ontransitionend === undefined &&
-    window.onwebkittransitionend !== undefined
-  ) {
-    transitionProp = 'WebkitTransition';
-    transitionEndEvent = 'webkitTransitionEnd';
-  }
-  if (window.onanimationend === undefined &&
-    window.onwebkitanimationend !== undefined
-  ) {
-    animationProp = 'WebkitAnimation';
-    animationEndEvent = 'webkitAnimationEnd';
-  }
-}
-
-// binding to window is necessary to make hot reload work in IE in strict mode
-var raf = inBrowser
-  ? window.requestAnimationFrame
-    ? window.requestAnimationFrame.bind(window)
-    : setTimeout
-  : /* istanbul ignore next */ function (fn) { return fn(); };
-
-function nextFrame (fn) {
-  raf(function () {
-    raf(fn);
-  });
-}
-
-function addTransitionClass (el, cls) {
-  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
-  if (transitionClasses.indexOf(cls) < 0) {
-    transitionClasses.push(cls);
-    addClass(el, cls);
-  }
-}
-
-function removeTransitionClass (el, cls) {
-  if (el._transitionClasses) {
-    remove(el._transitionClasses, cls);
-  }
-  removeClass(el, cls);
-}
-
-function whenTransitionEnds (
-  el,
-  expectedType,
-  cb
-) {
-  var ref = getTransitionInfo(el, expectedType);
-  var type = ref.type;
-  var timeout = ref.timeout;
-  var propCount = ref.propCount;
-  if (!type) { return cb() }
-  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-  var ended = 0;
-  var end = function () {
-    el.removeEventListener(event, onEnd);
-    cb();
-  };
-  var onEnd = function (e) {
-    if (e.target === el) {
-      if (++ended >= propCount) {
-        end();
-      }
-    }
-  };
-  setTimeout(function () {
-    if (ended < propCount) {
-      end();
-    }
-  }, timeout + 1);
-  el.addEventListener(event, onEnd);
-}
-
-var transformRE = /\b(transform|all)(,|$)/;
-
-function getTransitionInfo (el, expectedType) {
-  var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
-  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
-  var animationTimeout = getTimeout(animationDelays, animationDurations);
-
-  var type;
-  var timeout = 0;
-  var propCount = 0;
-  /* istanbul ignore if */
-  if (expectedType === TRANSITION) {
-    if (transitionTimeout > 0) {
-      type = TRANSITION;
-      timeout = transitionTimeout;
-      propCount = transitionDurations.length;
-    }
-  } else if (expectedType === ANIMATION) {
-    if (animationTimeout > 0) {
-      type = ANIMATION;
-      timeout = animationTimeout;
-      propCount = animationDurations.length;
-    }
-  } else {
-    timeout = Math.max(transitionTimeout, animationTimeout);
-    type = timeout > 0
-      ? transitionTimeout > animationTimeout
-        ? TRANSITION
-        : ANIMATION
-      : null;
-    propCount = type
-      ? type === TRANSITION
-        ? transitionDurations.length
-        : animationDurations.length
-      : 0;
-  }
-  var hasTransform =
-    type === TRANSITION &&
-    transformRE.test(styles[transitionProp + 'Property']);
-  return {
-    type: type,
-    timeout: timeout,
-    propCount: propCount,
-    hasTransform: hasTransform
-  }
-}
-
-function getTimeout (delays, durations) {
-  /* istanbul ignore next */
-  while (delays.length < durations.length) {
-    delays = delays.concat(delays);
-  }
-
-  return Math.max.apply(null, durations.map(function (d, i) {
-    return toMs(d) + toMs(delays[i])
-  }))
-}
-
-function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
-}
-
-/*  */
-
-function enter (vnode, toggleDisplay) {
-  var el = vnode.elm;
-
-  // call leave callback now
-  if (isDef(el._leaveCb)) {
-    el._leaveCb.cancelled = true;
-    el._leaveCb();
-  }
-
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data)) {
-    return
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._enterCb) || el.nodeType !== 1) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var enterClass = data.enterClass;
-  var enterToClass = data.enterToClass;
-  var enterActiveClass = data.enterActiveClass;
-  var appearClass = data.appearClass;
-  var appearToClass = data.appearToClass;
-  var appearActiveClass = data.appearActiveClass;
-  var beforeEnter = data.beforeEnter;
-  var enter = data.enter;
-  var afterEnter = data.afterEnter;
-  var enterCancelled = data.enterCancelled;
-  var beforeAppear = data.beforeAppear;
-  var appear = data.appear;
-  var afterAppear = data.afterAppear;
-  var appearCancelled = data.appearCancelled;
-  var duration = data.duration;
-
-  // activeInstance will always be the <transition> component managing this
-  // transition. One edge case to check is when the <transition> is placed
-  // as the root node of a child component. In that case we need to check
-  // <transition>'s parent for appear check.
-  var context = activeInstance;
-  var transitionNode = activeInstance.$vnode;
-  while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
-    context = transitionNode.context;
-  }
-
-  var isAppear = !context._isMounted || !vnode.isRootInsert;
-
-  if (isAppear && !appear && appear !== '') {
-    return
-  }
-
-  var startClass = isAppear && appearClass
-    ? appearClass
-    : enterClass;
-  var activeClass = isAppear && appearActiveClass
-    ? appearActiveClass
-    : enterActiveClass;
-  var toClass = isAppear && appearToClass
-    ? appearToClass
-    : enterToClass;
-
-  var beforeEnterHook = isAppear
-    ? (beforeAppear || beforeEnter)
-    : beforeEnter;
-  var enterHook = isAppear
-    ? (typeof appear === 'function' ? appear : enter)
-    : enter;
-  var afterEnterHook = isAppear
-    ? (afterAppear || afterEnter)
-    : afterEnter;
-  var enterCancelledHook = isAppear
-    ? (appearCancelled || enterCancelled)
-    : enterCancelled;
-
-  var explicitEnterDuration = toNumber(
-    isObject(duration)
-      ? duration.enter
-      : duration
-  );
-
-  if (process.env.NODE_ENV !== 'production' && explicitEnterDuration != null) {
-    checkDuration(explicitEnterDuration, 'enter', vnode);
-  }
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(enterHook);
-
-  var cb = el._enterCb = once(function () {
-    if (expectsCSS) {
-      removeTransitionClass(el, toClass);
-      removeTransitionClass(el, activeClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, startClass);
-      }
-      enterCancelledHook && enterCancelledHook(el);
-    } else {
-      afterEnterHook && afterEnterHook(el);
-    }
-    el._enterCb = null;
-  });
-
-  if (!vnode.data.show) {
-    // remove pending leave element on enter by injecting an insert hook
-    mergeVNodeHook(vnode, 'insert', function () {
-      var parent = el.parentNode;
-      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
-      if (pendingNode &&
-        pendingNode.tag === vnode.tag &&
-        pendingNode.elm._leaveCb
-      ) {
-        pendingNode.elm._leaveCb();
-      }
-      enterHook && enterHook(el, cb);
-    });
-  }
-
-  // start enter transition
-  beforeEnterHook && beforeEnterHook(el);
-  if (expectsCSS) {
-    addTransitionClass(el, startClass);
-    addTransitionClass(el, activeClass);
-    nextFrame(function () {
-      addTransitionClass(el, toClass);
-      removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
-        }
-      }
-    });
-  }
-
-  if (vnode.data.show) {
-    toggleDisplay && toggleDisplay();
-    enterHook && enterHook(el, cb);
-  }
-
-  if (!expectsCSS && !userWantsControl) {
-    cb();
-  }
-}
-
-function leave (vnode, rm) {
-  var el = vnode.elm;
-
-  // call enter callback now
-  if (isDef(el._enterCb)) {
-    el._enterCb.cancelled = true;
-    el._enterCb();
-  }
-
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data) || el.nodeType !== 1) {
-    return rm()
-  }
-
-  /* istanbul ignore if */
-  if (isDef(el._leaveCb)) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var leaveClass = data.leaveClass;
-  var leaveToClass = data.leaveToClass;
-  var leaveActiveClass = data.leaveActiveClass;
-  var beforeLeave = data.beforeLeave;
-  var leave = data.leave;
-  var afterLeave = data.afterLeave;
-  var leaveCancelled = data.leaveCancelled;
-  var delayLeave = data.delayLeave;
-  var duration = data.duration;
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(leave);
-
-  var explicitLeaveDuration = toNumber(
-    isObject(duration)
-      ? duration.leave
-      : duration
-  );
-
-  if (process.env.NODE_ENV !== 'production' && isDef(explicitLeaveDuration)) {
-    checkDuration(explicitLeaveDuration, 'leave', vnode);
-  }
-
-  var cb = el._leaveCb = once(function () {
-    if (el.parentNode && el.parentNode._pending) {
-      el.parentNode._pending[vnode.key] = null;
-    }
-    if (expectsCSS) {
-      removeTransitionClass(el, leaveToClass);
-      removeTransitionClass(el, leaveActiveClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, leaveClass);
-      }
-      leaveCancelled && leaveCancelled(el);
-    } else {
-      rm();
-      afterLeave && afterLeave(el);
-    }
-    el._leaveCb = null;
-  });
-
-  if (delayLeave) {
-    delayLeave(performLeave);
-  } else {
-    performLeave();
-  }
-
-  function performLeave () {
-    // the delayed leave may have already been cancelled
-    if (cb.cancelled) {
-      return
-    }
-    // record leaving element
-    if (!vnode.data.show) {
-      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
-    }
-    beforeLeave && beforeLeave(el);
-    if (expectsCSS) {
-      addTransitionClass(el, leaveClass);
-      addTransitionClass(el, leaveActiveClass);
-      nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
-        removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
-          }
-        }
-      });
-    }
-    leave && leave(el, cb);
-    if (!expectsCSS && !userWantsControl) {
-      cb();
-    }
-  }
-}
-
-// only used in dev mode
-function checkDuration (val, name, vnode) {
-  if (typeof val !== 'number') {
-    warn(
-      "<transition> explicit " + name + " duration is not a valid number - " +
-      "got " + (JSON.stringify(val)) + ".",
-      vnode.context
-    );
-  } else if (isNaN(val)) {
-    warn(
-      "<transition> explicit " + name + " duration is NaN - " +
-      'the duration expression might be incorrect.',
-      vnode.context
-    );
-  }
-}
-
-function isValidDuration (val) {
-  return typeof val === 'number' && !isNaN(val)
-}
-
-/**
- * Normalize a transition hook's argument length. The hook may be:
- * - a merged hook (invoker) with the original in .fns
- * - a wrapped component method (check ._length)
- * - a plain function (.length)
- */
-function getHookArgumentsLength (fn) {
-  if (isUndef(fn)) {
-    return false
-  }
-  var invokerFns = fn.fns;
-  if (isDef(invokerFns)) {
-    // invoker
-    return getHookArgumentsLength(
-      Array.isArray(invokerFns)
-        ? invokerFns[0]
-        : invokerFns
-    )
-  } else {
-    return (fn._length || fn.length) > 1
-  }
-}
-
-function _enter (_, vnode) {
-  if (vnode.data.show !== true) {
-    enter(vnode);
-  }
-}
-
-var transition = inBrowser ? {
-  create: _enter,
-  activate: _enter,
-  remove: function remove$$1 (vnode, rm) {
-    /* istanbul ignore else */
-    if (vnode.data.show !== true) {
-      leave(vnode, rm);
-    } else {
-      rm();
-    }
-  }
-} : {};
-
-var platformModules = [
-  attrs,
-  klass,
-  events,
-  domProps,
-  style,
-  transition
-];
-
-/*  */
-
-// the directive module should be applied last, after all
-// built-in modules have been applied.
-var modules = platformModules.concat(baseModules);
-
-var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
-
-/**
- * Not type checking this file because flow doesn't like attaching
- * properties to Elements.
- */
-
-/* istanbul ignore if */
-if (isIE9) {
-  // http://www.matts411.com/post/internet-explorer-9-oninput/
-  document.addEventListener('selectionchange', function () {
-    var el = document.activeElement;
-    if (el && el.vmodel) {
-      trigger(el, 'input');
-    }
-  });
-}
-
-var directive = {
-  inserted: function inserted (el, binding, vnode, oldVnode) {
-    if (vnode.tag === 'select') {
-      // #6903
-      if (oldVnode.elm && !oldVnode.elm._vOptions) {
-        mergeVNodeHook(vnode, 'postpatch', function () {
-          directive.componentUpdated(el, binding, vnode);
-        });
-      } else {
-        setSelected(el, binding, vnode.context);
-      }
-      el._vOptions = [].map.call(el.options, getValue);
-    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
-      el._vModifiers = binding.modifiers;
-      if (!binding.modifiers.lazy) {
-        // Safari < 10.2 & UIWebView doesn't fire compositionend when
-        // switching focus before confirming composition choice
-        // this also fixes the issue where some browsers e.g. iOS Chrome
-        // fires "change" instead of "input" on autocomplete.
-        el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
-        /* istanbul ignore if */
-        if (isIE9) {
-          el.vmodel = true;
-        }
-      }
-    }
-  },
-
-  componentUpdated: function componentUpdated (el, binding, vnode) {
-    if (vnode.tag === 'select') {
-      setSelected(el, binding, vnode.context);
-      // in case the options rendered by v-for have changed,
-      // it's possible that the value is out-of-sync with the rendered options.
-      // detect such cases and filter out values that no longer has a matching
-      // option in the DOM.
-      var prevOptions = el._vOptions;
-      var curOptions = el._vOptions = [].map.call(el.options, getValue);
-      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
-        // trigger change event if
-        // no matching option found for at least one value
-        var needReset = el.multiple
-          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
-          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
-        if (needReset) {
-          trigger(el, 'change');
-        }
-      }
-    }
-  }
-};
-
-function setSelected (el, binding, vm) {
-  actuallySetSelected(el, binding, vm);
-  /* istanbul ignore if */
-  if (isIE || isEdge) {
-    setTimeout(function () {
-      actuallySetSelected(el, binding, vm);
-    }, 0);
-  }
-}
-
-function actuallySetSelected (el, binding, vm) {
-  var value = binding.value;
-  var isMultiple = el.multiple;
-  if (isMultiple && !Array.isArray(value)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
-      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
-      vm
-    );
-    return
-  }
-  var selected, option;
-  for (var i = 0, l = el.options.length; i < l; i++) {
-    option = el.options[i];
-    if (isMultiple) {
-      selected = looseIndexOf(value, getValue(option)) > -1;
-      if (option.selected !== selected) {
-        option.selected = selected;
-      }
-    } else {
-      if (looseEqual(getValue(option), value)) {
-        if (el.selectedIndex !== i) {
-          el.selectedIndex = i;
-        }
-        return
-      }
-    }
-  }
-  if (!isMultiple) {
-    el.selectedIndex = -1;
-  }
-}
-
-function hasNoMatchingOption (value, options) {
-  return options.every(function (o) { return !looseEqual(o, value); })
-}
-
-function getValue (option) {
-  return '_value' in option
-    ? option._value
-    : option.value
-}
-
-function onCompositionStart (e) {
-  e.target.composing = true;
-}
-
-function onCompositionEnd (e) {
-  // prevent triggering an input event for no reason
-  if (!e.target.composing) { return }
-  e.target.composing = false;
-  trigger(e.target, 'input');
-}
-
-function trigger (el, type) {
-  var e = document.createEvent('HTMLEvents');
-  e.initEvent(type, true, true);
-  el.dispatchEvent(e);
-}
-
-/*  */
-
-// recursively search for possible transition defined inside the component root
-function locateNode (vnode) {
-  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
-    ? locateNode(vnode.componentInstance._vnode)
-    : vnode
-}
-
-var show = {
-  bind: function bind (el, ref, vnode) {
-    var value = ref.value;
-
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    var originalDisplay = el.__vOriginalDisplay =
-      el.style.display === 'none' ? '' : el.style.display;
-    if (value && transition$$1) {
-      vnode.data.show = true;
-      enter(vnode, function () {
-        el.style.display = originalDisplay;
-      });
-    } else {
-      el.style.display = value ? originalDisplay : 'none';
-    }
-  },
-
-  update: function update (el, ref, vnode) {
-    var value = ref.value;
-    var oldValue = ref.oldValue;
-
-    /* istanbul ignore if */
-    if (value === oldValue) { return }
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    if (transition$$1) {
-      vnode.data.show = true;
-      if (value) {
-        enter(vnode, function () {
-          el.style.display = el.__vOriginalDisplay;
-        });
-      } else {
-        leave(vnode, function () {
-          el.style.display = 'none';
-        });
-      }
-    } else {
-      el.style.display = value ? el.__vOriginalDisplay : 'none';
-    }
-  },
-
-  unbind: function unbind (
-    el,
-    binding,
-    vnode,
-    oldVnode,
-    isDestroy
-  ) {
-    if (!isDestroy) {
-      el.style.display = el.__vOriginalDisplay;
-    }
-  }
-};
-
-var platformDirectives = {
-  model: directive,
-  show: show
-};
-
-/*  */
-
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
-var transitionProps = {
-  name: String,
-  appear: Boolean,
-  css: Boolean,
-  mode: String,
-  type: String,
-  enterClass: String,
-  leaveClass: String,
-  enterToClass: String,
-  leaveToClass: String,
-  enterActiveClass: String,
-  leaveActiveClass: String,
-  appearClass: String,
-  appearActiveClass: String,
-  appearToClass: String,
-  duration: [Number, String, Object]
-};
-
-// in case the child is also an abstract component, e.g. <keep-alive>
-// we want to recursively retrieve the real component to be rendered
-function getRealChild (vnode) {
-  var compOptions = vnode && vnode.componentOptions;
-  if (compOptions && compOptions.Ctor.options.abstract) {
-    return getRealChild(getFirstComponentChild(compOptions.children))
-  } else {
-    return vnode
-  }
-}
-
-function extractTransitionData (comp) {
-  var data = {};
-  var options = comp.$options;
-  // props
-  for (var key in options.propsData) {
-    data[key] = comp[key];
-  }
-  // events.
-  // extract listeners and pass them directly to the transition methods
-  var listeners = options._parentListeners;
-  for (var key$1 in listeners) {
-    data[camelize(key$1)] = listeners[key$1];
-  }
-  return data
-}
-
-function placeholder (h, rawChild) {
-  if (/\d-keep-alive$/.test(rawChild.tag)) {
-    return h('keep-alive', {
-      props: rawChild.componentOptions.propsData
-    })
-  }
-}
-
-function hasParentTransition (vnode) {
-  while ((vnode = vnode.parent)) {
-    if (vnode.data.transition) {
-      return true
-    }
-  }
-}
-
-function isSameChild (child, oldChild) {
-  return oldChild.key === child.key && oldChild.tag === child.tag
-}
-
-var Transition = {
-  name: 'transition',
-  props: transitionProps,
-  abstract: true,
-
-  render: function render (h) {
-    var this$1 = this;
-
-    var children = this.$slots.default;
-    if (!children) {
-      return
-    }
-
-    // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
-    /* istanbul ignore if */
-    if (!children.length) {
-      return
-    }
-
-    // warn multiple elements
-    if (process.env.NODE_ENV !== 'production' && children.length > 1) {
-      warn(
-        '<transition> can only be used on a single element. Use ' +
-        '<transition-group> for lists.',
-        this.$parent
-      );
-    }
-
-    var mode = this.mode;
-
-    // warn invalid mode
-    if (process.env.NODE_ENV !== 'production' &&
-      mode && mode !== 'in-out' && mode !== 'out-in'
-    ) {
-      warn(
-        'invalid <transition> mode: ' + mode,
-        this.$parent
-      );
-    }
-
-    var rawChild = children[0];
-
-    // if this is a component root node and the component's
-    // parent container node also has transition, skip.
-    if (hasParentTransition(this.$vnode)) {
-      return rawChild
-    }
-
-    // apply transition data to child
-    // use getRealChild() to ignore abstract components e.g. keep-alive
-    var child = getRealChild(rawChild);
-    /* istanbul ignore if */
-    if (!child) {
-      return rawChild
-    }
-
-    if (this._leaving) {
-      return placeholder(h, rawChild)
-    }
-
-    // ensure a key that is unique to the vnode type and to this transition
-    // component instance. This key will be used to remove pending leaving nodes
-    // during entering.
-    var id = "__transition-" + (this._uid) + "-";
-    child.key = child.key == null
-      ? child.isComment
-        ? id + 'comment'
-        : id + child.tag
-      : isPrimitive(child.key)
-        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-        : child.key;
-
-    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-    var oldRawChild = this._vnode;
-    var oldChild = getRealChild(oldRawChild);
-
-    // mark v-show
-    // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
-      child.data.show = true;
-    }
-
-    if (
-      oldChild &&
-      oldChild.data &&
-      !isSameChild(child, oldChild) &&
-      !isAsyncPlaceholder(oldChild) &&
-      // #6687 component root is a comment node
-      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
-    ) {
-      // replace old child transition data with fresh one
-      // important for dynamic transitions!
-      var oldData = oldChild.data.transition = extend({}, data);
-      // handle transition mode
-      if (mode === 'out-in') {
-        // return placeholder node and queue update when leave finishes
-        this._leaving = true;
-        mergeVNodeHook(oldData, 'afterLeave', function () {
-          this$1._leaving = false;
-          this$1.$forceUpdate();
-        });
-        return placeholder(h, rawChild)
-      } else if (mode === 'in-out') {
-        if (isAsyncPlaceholder(child)) {
-          return oldRawChild
-        }
-        var delayedLeave;
-        var performLeave = function () { delayedLeave(); };
-        mergeVNodeHook(data, 'afterEnter', performLeave);
-        mergeVNodeHook(data, 'enterCancelled', performLeave);
-        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
-      }
-    }
-
-    return rawChild
-  }
-};
-
-/*  */
-
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
-
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
-
-var props = extend({
-  tag: String,
-  moveClass: String
-}, transitionProps);
-
-delete props.mode;
-
-var TransitionGroup = {
-  props: props,
-
-  render: function render (h) {
-    var tag = this.tag || this.$vnode.data.tag || 'span';
-    var map = Object.create(null);
-    var prevChildren = this.prevChildren = this.children;
-    var rawChildren = this.$slots.default || [];
-    var children = this.children = [];
-    var transitionData = extractTransitionData(this);
-
-    for (var i = 0; i < rawChildren.length; i++) {
-      var c = rawChildren[i];
-      if (c.tag) {
-        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
-          children.push(c);
-          map[c.key] = c
-          ;(c.data || (c.data = {})).transition = transitionData;
-        } else if (process.env.NODE_ENV !== 'production') {
-          var opts = c.componentOptions;
-          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-          warn(("<transition-group> children must be keyed: <" + name + ">"));
-        }
-      }
-    }
-
-    if (prevChildren) {
-      var kept = [];
-      var removed = [];
-      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
-        var c$1 = prevChildren[i$1];
-        c$1.data.transition = transitionData;
-        c$1.data.pos = c$1.elm.getBoundingClientRect();
-        if (map[c$1.key]) {
-          kept.push(c$1);
-        } else {
-          removed.push(c$1);
-        }
-      }
-      this.kept = h(tag, null, kept);
-      this.removed = removed;
-    }
-
-    return h(tag, null, children)
-  },
-
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
-
-  updated: function updated () {
-    var children = this.prevChildren;
-    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
-    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
-      return
-    }
-
-    // we divide the work into three loops to avoid mixing DOM reads and writes
-    // in each iteration - which helps prevent layout thrashing.
-    children.forEach(callPendingCbs);
-    children.forEach(recordPosition);
-    children.forEach(applyTranslation);
-
-    // force reflow to put everything in position
-    // assign to this to avoid being removed in tree-shaking
-    // $flow-disable-line
-    this._reflow = document.body.offsetHeight;
-
-    children.forEach(function (c) {
-      if (c.data.moved) {
-        var el = c.elm;
-        var s = el.style;
-        addTransitionClass(el, moveClass);
-        s.transform = s.WebkitTransform = s.transitionDuration = '';
-        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
-          if (!e || /transform$/.test(e.propertyName)) {
-            el.removeEventListener(transitionEndEvent, cb);
-            el._moveCb = null;
-            removeTransitionClass(el, moveClass);
-          }
-        });
-      }
-    });
-  },
-
-  methods: {
-    hasMove: function hasMove (el, moveClass) {
-      /* istanbul ignore if */
-      if (!hasTransition) {
-        return false
-      }
-      /* istanbul ignore if */
-      if (this._hasMove) {
-        return this._hasMove
-      }
-      // Detect whether an element with the move class applied has
-      // CSS transitions. Since the element may be inside an entering
-      // transition at this very moment, we make a clone of it and remove
-      // all other transition classes applied to ensure only the move class
-      // is applied.
-      var clone = el.cloneNode();
-      if (el._transitionClasses) {
-        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
-      }
-      addClass(clone, moveClass);
-      clone.style.display = 'none';
-      this.$el.appendChild(clone);
-      var info = getTransitionInfo(clone);
-      this.$el.removeChild(clone);
-      return (this._hasMove = info.hasTransform)
-    }
-  }
-};
-
-function callPendingCbs (c) {
-  /* istanbul ignore if */
-  if (c.elm._moveCb) {
-    c.elm._moveCb();
-  }
-  /* istanbul ignore if */
-  if (c.elm._enterCb) {
-    c.elm._enterCb();
-  }
-}
-
-function recordPosition (c) {
-  c.data.newPos = c.elm.getBoundingClientRect();
-}
-
-function applyTranslation (c) {
-  var oldPos = c.data.pos;
-  var newPos = c.data.newPos;
-  var dx = oldPos.left - newPos.left;
-  var dy = oldPos.top - newPos.top;
-  if (dx || dy) {
-    c.data.moved = true;
-    var s = c.elm.style;
-    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
-    s.transitionDuration = '0s';
-  }
+  module.exports = require('./vue.runtime.common.dev.js')
 }
-
-var platformComponents = {
-  Transition: Transition,
-  TransitionGroup: TransitionGroup
-};
-
-/*  */
-
-// install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
-
-// install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
-
-// install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
-
-// public mount method
-Vue$3.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && inBrowser ? query(el) : undefined;
-  return mountComponent(this, el, hydrating)
-};
-
-// devtools global hook
-/* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if (process.env.NODE_ENV !== 'production' && isChrome) {
-      console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
-      );
-    }
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
-  }
-}, 0);
-
-/*  */
-
-module.exports = Vue$3;
diff --git a/dist/vue.runtime.common.prod.js b/dist/vue.runtime.common.prod.js
new file mode 100644
index 00000000000..8695bc88b41
--- /dev/null
+++ b/dist/vue.runtime.common.prod.js
@@ -0,0 +1,6 @@
+/*!
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
+ * Released under the MIT License.
+ */
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k=d("attrs,class,staticClass,staticStyle,key");function O(t,e,o,i){var a,s=e.tag,c=e.data,u=e.children;if(i=i||c&&c.pre,e.elm=t,r(e.isComment)&&n(e.asyncFactory))return e.isAsyncPlaceholder=!0,!0;if(n(c)&&(n(a=c.hook)&&n(a=a.init)&&a(e,!0),n(a=e.componentInstance)))return p(e,o),!0;if(n(s)){if(n(u))if(t.hasChildNodes())if(n(a=c)&&n(a=a.domProps)&&n(a=a.innerHTML)){if(a!==t.innerHTML)return!1}else{for(var l=!0,f=t.firstChild,d=0;d<u.length;d++){if(!f||!O(f,u[d],o,i)){l=!1;break}f=f.nextSibling}if(!l||f)return!1}else h(e,u,o);if(n(c)){var v=!1;for(var m in c)if(!k(m)){v=!0,y(e,o);break}!v&&c.class&&Yt(c.class)}}else t.data!==e.text&&(t.data=e.text);return!0}return function(t,o,i,a){if(!e(o)){var c,l=!1,d=[];if(e(t))l=!0,f(o,d);else{var p=n(t.nodeType);if(!p&&tr(t,o))A(t,o,d,null,null,a);else{if(p){if(1===t.nodeType&&t.hasAttribute(D)&&(t.removeAttribute(D),i=!0),r(i)&&O(t,o,d))return x(o,d,!0),t;c=t,t=new lt(u.tagName(c).toLowerCase(),{},[],void 0,c)}var v=t.elm,h=u.parentNode(v);if(f(o,d,v._leaveCb?null:h,u.nextSibling(v)),n(o.parent))for(var y=o.parent,g=m(o);y;){for(var _=0;_<s.destroy.length;++_)s.destroy[_](y);if(y.elm=o.elm,g){for(var $=0;$<s.create.length;++$)s.create[$](Qn,y);var w=y.data.hook.insert;if(w.merged)for(var k=1;k<w.fns.length;k++)w.fns[k]()}else Jn(y);y=y.parent}n(h)?C([t],0,0):n(t.tag)&&b(t)}}return x(o,d,l),o.elm}n(t)&&b(t)}}({nodeOps:Gn,modules:[dr,hr,Ar,Or,Fr,U?{create:lo,activate:lo,remove:function(t,e){!0!==t.data.show?so(t,e):e()}}:{}].concat(cr)});q&&document.addEventListener("selectionchange",function(){var t=document.activeElement;t&&t.vmodel&&bo(t,"input")});var po={inserted:function(t,e,n,r){"select"===n.tag?(r.elm&&!r.elm._vOptions?re(n,"postpatch",function(){po.componentUpdated(t,e,n)}):vo(t,e,n.context),t._vOptions=[].map.call(t.options,yo)):("textarea"===n.tag||Xn(t.type))&&(t._vModifiers=e.modifiers,e.modifiers.lazy||(t.addEventListener("compositionstart",go),t.addEventListener("compositionend",_o),t.addEventListener("change",_o),q&&(t.vmodel=!0)))},componentUpdated:function(t,e,n){if("select"===n.tag){vo(t,e,n.context);var r=t._vOptions,o=t._vOptions=[].map.call(t.options,yo);if(o.some(function(t,e){return!T(t,r[e])}))(t.multiple?e.value.some(function(t){return mo(t,o)}):e.value!==e.oldValue&&mo(e.value,o))&&bo(t,"change")}}};function vo(t,e,n){ho(t,e,n),(W||K)&&setTimeout(function(){ho(t,e,n)},0)}function ho(t,e,n){var r=e.value,o=t.multiple;if(!o||Array.isArray(r)){for(var i,a,s=0,c=t.options.length;s<c;s++)if(a=t.options[s],o)i=j(r,yo(a))>-1,a.selected!==i&&(a.selected=i);else if(T(yo(a),r))return void(t.selectedIndex!==s&&(t.selectedIndex=s));o||(t.selectedIndex=-1)}}function mo(t,e){return e.every(function(e){return!T(e,t)})}function yo(t){return"_value"in t?t._value:t.value}function go(t){t.target.composing=!0}function _o(t){t.target.composing&&(t.target.composing=!1,bo(t.target,"input"))}function bo(t,e){var n=document.createEvent("HTMLEvents");n.initEvent(e,!0,!0),t.dispatchEvent(n)}function Co(t){return!t.componentInstance||t.data&&t.data.transition?t:Co(t.componentInstance._vnode)}var $o={model:po,show:{bind:function(t,e,n){var r=e.value,o=(n=Co(n)).data&&n.data.transition,i=t.__vOriginalDisplay="none"===t.style.display?"":t.style.display;r&&o?(n.data.show=!0,ao(n,function(){t.style.display=i})):t.style.display=r?i:"none"},update:function(t,e,n){var r=e.value;!r!=!e.oldValue&&((n=Co(n)).data&&n.data.transition?(n.data.show=!0,r?ao(n,function(){t.style.display=t.__vOriginalDisplay}):so(n,function(){t.style.display="none"})):t.style.display=r?t.__vOriginalDisplay:"none")},unbind:function(t,e,n,r,o){o||(t.style.display=t.__vOriginalDisplay)}}},wo={name:String,appear:Boolean,css:Boolean,mode:String,type:String,enterClass:String,leaveClass:String,enterToClass:String,leaveToClass:String,enterActiveClass:String,leaveActiveClass:String,appearClass:String,appearActiveClass:String,appearToClass:String,duration:[Number,String,Object]};function Ao(t){var e=t&&t.componentOptions;return e&&e.Ctor.options.abstract?Ao(He(e.children)):t}function xo(t){var e={},n=t.$options;for(var r in n.propsData)e[r]=t[r];var o=n._parentListeners;for(var i in o)e[_(i)]=o[i];return e}function ko(t,e){if(/\d-keep-alive$/.test(e.tag))return t("keep-alive",{props:e.componentOptions.propsData})}var Oo=function(t){return t.tag||le(t)},So=function(t){return"show"===t.name},Eo={name:"transition",props:wo,abstract:!0,render:function(t){var e=this,n=this.$slots.default;if(n&&(n=n.filter(Oo)).length){var r=this.mode,i=n[0];if(function(t){for(;t=t.parent;)if(t.data.transition)return!0}(this.$vnode))return i;var a=Ao(i);if(!a)return i;if(this._leaving)return ko(t,i);var s="__transition-"+this._uid+"-";a.key=null==a.key?a.isComment?s+"comment":s+a.tag:o(a.key)?0===String(a.key).indexOf(s)?a.key:s+a.key:a.key;var c=(a.data||(a.data={})).transition=xo(this),u=this._vnode,l=Ao(u);if(a.data.directives&&a.data.directives.some(So)&&(a.data.show=!0),l&&l.data&&!function(t,e){return e.key===t.key&&e.tag===t.tag}(a,l)&&!le(l)&&(!l.componentInstance||!l.componentInstance._vnode.isComment)){var f=l.data.transition=x({},c);if("out-in"===r)return this._leaving=!0,re(f,"afterLeave",function(){e._leaving=!1,e.$forceUpdate()}),ko(t,i);if("in-out"===r){if(le(a))return u;var d,p=function(){d()};re(c,"afterEnter",p),re(c,"enterCancelled",p),re(f,"delayLeave",function(t){d=t})}}return i}}},To=x({tag:String,moveClass:String},wo);function jo(t){t.elm._moveCb&&t.elm._moveCb(),t.elm._enterCb&&t.elm._enterCb()}function Io(t){t.data.newPos=t.elm.getBoundingClientRect()}function Do(t){var e=t.data.pos,n=t.data.newPos,r=e.left-n.left,o=e.top-n.top;if(r||o){t.data.moved=!0;var i=t.elm.style;i.transform=i.WebkitTransform="translate("+r+"px,"+o+"px)",i.transitionDuration="0s"}}delete To.mode;var No={Transition:Eo,TransitionGroup:{props:To,beforeMount:function(){var t=this,e=this._update;this._update=function(n,r){var o=Xe(t);t.__patch__(t._vnode,t.kept,!1,!0),t._vnode=t.kept,o(),e.call(t,n,r)}},render:function(t){for(var e=this.tag||this.$vnode.data.tag||"span",n=Object.create(null),r=this.prevChildren=this.children,o=this.$slots.default||[],i=this.children=[],a=xo(this),s=0;s<o.length;s++){var c=o[s];c.tag&&null!=c.key&&0!==String(c.key).indexOf("__vlist")&&(i.push(c),n[c.key]=c,(c.data||(c.data={})).transition=a)}if(r){for(var u=[],l=[],f=0;f<r.length;f++){var d=r[f];d.data.transition=a,d.data.pos=d.elm.getBoundingClientRect(),n[d.key]?u.push(d):l.push(d)}this.kept=t(e,null,u),this.removed=l}return t(e,null,i)},updated:function(){var t=this.prevChildren,e=this.moveClass||(this.name||"v")+"-move";t.length&&this.hasMove(t[0].elm,e)&&(t.forEach(jo),t.forEach(Io),t.forEach(Do),this._reflow=document.body.offsetHeight,t.forEach(function(t){if(t.data.moved){var n=t.elm,r=n.style;Yr(n,e),r.transform=r.WebkitTransform=r.transitionDuration="",n.addEventListener(Xr,n._moveCb=function t(r){r&&r.target!==n||r&&!/transform$/.test(r.propertyName)||(n.removeEventListener(Xr,t),n._moveCb=null,to(n,e))})}}))},methods:{hasMove:function(t,e){if(!zr)return!1;if(this._hasMove)return this._hasMove;var n=t.cloneNode();t._transitionClasses&&t._transitionClasses.forEach(function(t){Ur(n,t)}),Vr(n,e),n.style.display="none",this.$el.appendChild(n);var r=ro(n);return this.$el.removeChild(n),this._hasMove=r.hasTransform}}}};Cn.config.mustUseProp=function(t,e,n){return"value"===n&&Tn(t)&&"button"!==e||"selected"===n&&"option"===t||"checked"===n&&"input"===t||"muted"===n&&"video"===t},Cn.config.isReservedTag=qn,Cn.config.isReservedAttr=En,Cn.config.getTagNamespace=function(t){return Wn(t)?"svg":"math"===t?"math":void 0},Cn.config.isUnknownElement=function(t){if(!U)return!0;if(qn(t))return!1;if(t=t.toLowerCase(),null!=Kn[t])return Kn[t];var e=document.createElement(t);return t.indexOf("-")>-1?Kn[t]=e.constructor===window.HTMLUnknownElement||e.constructor===window.HTMLElement:Kn[t]=/HTMLUnknownElement/.test(e.toString())},x(Cn.options.directives,$o),x(Cn.options.components,No),Cn.prototype.__patch__=U?fo:O,Cn.prototype.$mount=function(t,e){return function(t,e,n){var r;return t.$el=e,t.$options.render||(t.$options.render=dt),Je(t,"beforeMount"),r=function(){t._update(t._render(),n)},new ln(t,r,O,{before:function(){t._isMounted&&!t._isDestroyed&&Je(t,"beforeUpdate")}},!0),n=!1,null==t.$vnode&&(t._isMounted=!0,Je(t,"mounted")),t}(this,t=t&&U?function(t){if("string"==typeof t){var e=document.querySelector(t);return e||document.createElement("div")}return t}(t):void 0,e)},U&&setTimeout(function(){L.devtools&&tt&&tt.emit("init",Cn)},0),module.exports=Cn;
\ No newline at end of file
diff --git a/dist/vue.runtime.esm.js b/dist/vue.runtime.esm.js
index 58ba539b72c..83851f5c9ac 100644
--- a/dist/vue.runtime.esm.js
+++ b/dist/vue.runtime.esm.js
@@ -1,14 +1,14 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 /*  */
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 function isUndef (v) {
   return v === undefined || v === null
 }
@@ -26,7 +26,7 @@ function isFalse (v) {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 function isPrimitive (value) {
   return (
@@ -48,7 +48,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -76,19 +76,27 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 function toString (val) {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {
@@ -120,12 +128,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -137,7 +145,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -179,9 +187,15 @@ var hyphenate = cached(function (str) {
 });
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
-function bind (fn, ctx) {
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
   function boundFn (a) {
     var l = arguments.length;
     return l
@@ -190,11 +204,19 @@ function bind (fn, ctx) {
         : fn.call(ctx, a)
       : fn.call(ctx)
   }
-  // record original fn length
+
   boundFn._length = fn.length;
   return boundFn
 }
 
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
 /**
  * Convert an Array-like object to a real Array.
  */
@@ -231,10 +253,12 @@ function toObject (arr) {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -243,15 +267,12 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
+/* eslint-enable no-unused-vars */
 
 /**
- * Generate a static keys string from compiler modules.
+ * Return the same value.
  */
-
+var identity = function (_) { return _; };
 
 /**
  * Check if two values are loosely equal - that is,
@@ -269,6 +290,8 @@ function looseEqual (a, b) {
         return a.length === b.length && a.every(function (e, i) {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         var keysA = Object.keys(a);
         var keysB = Object.keys(b);
@@ -290,6 +313,11 @@ function looseEqual (a, b) {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 function looseIndexOf (arr, val) {
   for (var i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) { return i }
@@ -329,11 +357,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -416,6 +447,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -424,6 +461,13 @@ var config = ({
 
 /*  */
 
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
 /**
  * Check if a string starts with $ or _
  */
@@ -447,7 +491,7 @@ function def (obj, key, val, enumerable) {
 /**
  * Parse simple path.
  */
-var bailRE = /[^\w.$]/;
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
 function parsePath (path) {
   if (bailRE.test(path)) {
     return
@@ -464,7 +508,6 @@ function parsePath (path) {
 
 /*  */
 
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -479,6 +522,8 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
@@ -503,10 +548,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -533,7 +578,7 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
   _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
+  _Set = /*@__PURE__*/(function () {
     function Set () {
       this.set = Object.create(null);
     }
@@ -591,7 +636,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -647,15 +692,14 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
-var uid$1 = 0;
+var uid = 0;
 
 /**
  * A dep is an observable that can have multiple
  * directives subscribing to it.
  */
 var Dep = function Dep () {
-  this.id = uid$1++;
+  this.id = uid++;
   this.subs = [];
 };
 
@@ -676,24 +720,31 @@ Dep.prototype.depend = function depend () {
 Dep.prototype.notify = function notify () {
   // stabilize the subscriber list first
   var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
   for (var i = 0, l = subs.length; i < l; i++) {
     subs[i].update();
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 var targetStack = [];
 
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
 }
 
 function popTarget () {
-  Dep.target = targetStack.pop();
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
 }
 
 /*  */
@@ -760,16 +811,18 @@ function createTextVNode (val) {
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
 // on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
+function cloneVNode (vnode) {
   var cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
-    componentOptions,
+    vnode.componentOptions,
     vnode.asyncFactory
   );
   cloned.ns = vnode.ns;
@@ -779,34 +832,20 @@ function cloneVNode (vnode, deep) {
   cloned.fnContext = vnode.fnContext;
   cloned.fnOptions = vnode.fnOptions;
   cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
   cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
   return cloned
 }
 
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -814,7 +853,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -845,20 +889,20 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -866,10 +910,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -877,14 +922,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -900,17 +945,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -934,7 +979,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -951,7 +996,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -968,6 +1013,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -996,6 +1044,8 @@ function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1013,6 +1063,11 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1034,7 +1089,7 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
@@ -1043,6 +1098,11 @@ function set (target, key, val) {
  * Delete a property and trigger change if necessary.
  */
 function del (target, key) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.splice(key, 1);
     return
@@ -1109,14 +1169,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1197,13 +1267,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -1314,11 +1397,10 @@ function checkComponents (options) {
 }
 
 function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
     warn(
       'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
+      'should conform to valid custom element name in html5 specification.'
     );
   }
   if (isBuiltInTag(name) || config.isReservedTag(name)) {
@@ -1401,9 +1483,9 @@ function normalizeDirectives (options) {
   var dirs = options.directives;
   if (dirs) {
     for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
       }
     }
   }
@@ -1439,15 +1521,22 @@ function mergeOptions (
   normalizeProps(child, vm);
   normalizeInject(child, vm);
   normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
     }
   }
+
   var options = {};
   var key;
   for (key in parent) {
@@ -1500,6 +1589,8 @@ function resolveAsset (
 
 /*  */
 
+
+
 function validateProp (
   key,
   propOptions,
@@ -1509,12 +1600,18 @@ function validateProp (
   var prop = propOptions[key];
   var absent = !hasOwn(propsData, key);
   var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
     }
   }
   // check default value
@@ -1522,15 +1619,15 @@ function validateProp (
     value = getPropDefaultValue(vm, prop, key);
     // since the default value is a fresh copy,
     // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
     observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+    toggleObserving(prevShouldObserve);
   }
   if (
     process.env.NODE_ENV !== 'production' &&
     // skip validation for weex recycle-list child component props
-    !(false && isObject(value) && ('@binding' in value))
+    !(false)
   ) {
     assertProp(prop, key, value, vm, absent);
   }
@@ -1598,16 +1695,16 @@ function assertProp (
       type = [type];
     }
     for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
+      var assertedType = assertType(value, type[i], vm);
       expectedTypes.push(assertedType.expectedType || '');
       valid = assertedType.valid;
     }
   }
-  if (!valid) {
+
+  var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+  if (!valid && haveExpectedTypes) {
     warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     );
     return
@@ -1623,9 +1720,9 @@ function assertProp (
   }
 }
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
 
-function assertType (value, type) {
+function assertType (value, type, vm) {
   var valid;
   var expectedType = getType(type);
   if (simpleCheckRE.test(expectedType)) {
@@ -1640,7 +1737,12 @@ function assertType (value, type) {
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value);
   } else {
-    valid = value instanceof type;
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
   }
   return {
     valid: valid,
@@ -1648,49 +1750,127 @@ function assertType (value, type) {
   }
 }
 
+var functionTypeCheckRE = /^\s*function (\w+)/;
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  var match = fn && fn.toString().match(functionTypeCheckRE);
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += " with value " + (styleValue(value, expectedType));
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + (styleValue(value, receivedType)) + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
 }
 
 /*  */
 
 function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
   }
-  globalHandleError(err, vm, info);
+  return res
 }
 
 function globalHandleError (err, vm, info) {
@@ -1698,7 +1878,11 @@ function globalHandleError (err, vm, info) {
     try {
       return config.errorHandler.call(null, err, vm, info)
     } catch (e) {
-      logError(e, null, 'config.errorHandler');
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
     }
   }
   logError(err, vm, info);
@@ -1717,7 +1901,8 @@ function logError (err, vm, info) {
 }
 
 /*  */
-/* globals MessageChannel */
+
+var isUsingMicroTask = false;
 
 var callbacks = [];
 var pending = false;
@@ -1731,74 +1916,69 @@ function flushCallbacks () {
   }
 }
 
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
 if (typeof Promise !== 'undefined' && isNative(Promise)) {
   var p = Promise.resolve();
-  microTimerFunc = function () {
+  timerFunc = function () {
     p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
     // it can get stuck in a weird state where callbacks are pushed into the
     // microtask queue but the queue isn't being flushed, until the browser
     // needs to do some other work, e.g. handle a timer. Therefore we can
     // "force" the microtask queue to be flushed by adding an empty timer.
     if (isIOS) { setTimeout(noop); }
   };
+  isUsingMicroTask = true;
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+  isUsingMicroTask = true;
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
 } else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
 }
 
 function nextTick (cb, ctx) {
@@ -1816,11 +1996,7 @@ function nextTick (cb, ctx) {
   });
   if (!pending) {
     pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
+    timerFunc();
   }
   // $flow-disable-line
   if (!cb && typeof Promise !== 'undefined') {
@@ -1840,7 +2016,7 @@ if (process.env.NODE_ENV !== 'production') {
   var allowedGlobals = makeMap(
     'Infinity,undefined,NaN,isFinite,isNaN,' +
     'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
     'require' // for Webpack/Browserify
   );
 
@@ -1855,9 +2031,18 @@ if (process.env.NODE_ENV !== 'production') {
     );
   };
 
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://vuejs.org/v2/api/#data',
+      target
+    );
+  };
+
   var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    typeof Proxy !== 'undefined' && isNative(Proxy);
 
   if (hasProxy) {
     var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
@@ -1877,9 +2062,11 @@ if (process.env.NODE_ENV !== 'production') {
   var hasHandler = {
     has: function has (target, key) {
       var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
       if (!has && !isAllowed) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return has || !isAllowed
     }
@@ -1888,7 +2075,8 @@ if (process.env.NODE_ENV !== 'production') {
   var getHandler = {
     get: function get (target, key) {
       if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return target[key]
     }
@@ -1925,7 +2113,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
     return
   }
   if (val.__ob__) {
@@ -1963,7 +2151,7 @@ if (process.env.NODE_ENV !== 'production') {
       perf.measure(name, startTag, endTag);
       perf.clearMarks(startTag);
       perf.clearMarks(endTag);
-      perf.clearMeasures(name);
+      // perf.clearMeasures(name)
     };
   }
 }
@@ -1985,7 +2173,7 @@ var normalizeEvent = cached(function (name) {
   }
 });
 
-function createFnInvoker (fns) {
+function createFnInvoker (fns, vm) {
   function invoker () {
     var arguments$1 = arguments;
 
@@ -1993,11 +2181,11 @@ function createFnInvoker (fns) {
     if (Array.isArray(fns)) {
       var cloned = fns.slice();
       for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
     }
   }
   invoker.fns = fns;
@@ -2009,14 +2197,14 @@ function updateListeners (
   oldOn,
   add,
   remove$$1,
+  createOnceHandler,
   vm
 ) {
-  var name, def, cur, old, event;
+  var name, def$$1, cur, old, event;
   for (name in on) {
-    def = cur = on[name];
+    def$$1 = cur = on[name];
     old = oldOn[name];
     event = normalizeEvent(name);
-    /* istanbul ignore if */
     if (isUndef(cur)) {
       process.env.NODE_ENV !== 'production' && warn(
         "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
@@ -2024,9 +2212,12 @@ function updateListeners (
       );
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+        cur = on[name] = createFnInvoker(cur, vm);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
     } else if (cur !== old) {
       old.fns = cur;
       on[name] = old;
@@ -2232,293 +2423,75 @@ function normalizeArrayChildren (children, nestedIndex) {
 
 /*  */
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
   }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
 }
 
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production') {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      } else {
+        defineReactive$$1(vm, key, result[key]);
+      }
+    });
+    toggleObserving(true);
   }
+}
 
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
 
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else if (process.env.NODE_ENV !== 'production') {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
   }
+}
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
-
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-var target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    if (process.env.NODE_ENV !== 'production') {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
-      }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
+/*  */
 
 
 
@@ -2529,10 +2502,10 @@ function resolveSlots (
   children,
   context
 ) {
-  var slots = {};
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  var slots = {};
   for (var i = 0, l = children.length; i < l; i++) {
     var child = children[i];
     var data = child.data;
@@ -2569,1951 +2542,2444 @@ function isWhitespace (node) {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
-    }
-  }
-  return res
-}
-
 /*  */
 
-var activeInstance = null;
-var isUpdatingChildComponent = false;
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
 
-function initLifecycle (vm) {
-  var options = vm.$options;
+/*  */
 
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
+) {
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
     }
-    parent.$children.push(vm);
   }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
+  return res
+}
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    var vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
 
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
 }
 
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
-
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
+/*  */
 
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
     }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
     }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
     }
-  };
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
 }
 
-function mountComponent (
-  vm,
-  el,
-  hydrating
+/*  */
+
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
 ) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    if (process.env.NODE_ENV !== 'production') {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
       }
+      props = extend(extend({}, bindObject), props);
     }
-  }
-  callHook(vm, 'beforeMount');
-
-  var updateComponent;
-  /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
   } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
   }
 
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
   }
-  return vm
 }
 
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = true;
-  }
-
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
-
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
-
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
-
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+/*  */
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
 
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+/*  */
 
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = false;
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
   }
 }
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
   }
-  return false
+  return eventKeyCode === undefined
 }
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
-
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
+/*  */
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
       }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
     }
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
+  return data
 }
 
 /*  */
 
-
-var MAX_UPDATE_COUNT = 100;
-
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
-
 /**
- * Reset the scheduler's state.
+ * Runtime helper for rendering static trees.
  */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  if (process.env.NODE_ENV !== 'production') {
-    circular = {};
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
   }
-  waiting = flushing = false;
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
 }
 
 /**
- * Flush both queues and run the watchers.
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
  */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
 
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
-        );
-        break
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
       }
     }
-  }
-
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
-
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
+  } else {
+    markStaticNode(tree, key, isOnce);
   }
 }
 
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
-    }
-  }
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
 }
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
+/*  */
 
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
   }
+  return data
 }
 
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
       }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
+      res[slot.key] = slot.fn;
     }
   }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
 }
 
 /*  */
 
-var uid$2 = 0;
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
+  }
+  return baseObj
+}
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
 ) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
   }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
+      }
+      return vnode
+    };
   } else {
-    this.deep = this.user = this.lazy = this.sync = false;
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
   }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = process.env.NODE_ENV !== 'production'
-    ? expOrFn.toString()
-    : '';
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+    }
   } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
     }
+    return res
   }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
+}
 
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
+  }
+}
+
+/*  */
+
+/*  */
+
+/*  */
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     } else {
-      throw e
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
     }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
+
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
+      } else {
+        activateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  },
+
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
     }
-    popTarget();
-    this.cleanupDeps();
   }
-  return value
 };
 
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
+var hooksToMerge = Object.keys(componentVNodeHooks);
+
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
+  }
+
+  var baseCtor = context.$options._base;
+
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    if (process.env.NODE_ENV !== 'production') {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
+    }
+    return
+  }
+
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
+
+  data = data || {};
+
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
+
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
+  }
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  }
+
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
+
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
+
+    // work around flow
+    var slot = data.slot;
+    data = {};
+    if (slot) {
+      data.slot = slot;
+    }
+  }
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  return vnode
+}
+
+function createComponentInstanceForVnode (
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
+  }
+  return new vnode.componentOptions.Ctor(options)
+}
+
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
+
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
+
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
+  } else {
+    on[event] = callback;
+  }
+}
+
+/*  */
+
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
+}
+
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
+) {
+  if (isDef(data) && isDef((data).__ob__)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (process.env.NODE_ENV !== 'production' &&
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
     }
   }
-};
-
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
-
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+        warn(
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
+        );
+      }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
   }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
-
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
   } else {
-    queueWatcher(this);
+    return createEmptyVNode()
   }
-};
+}
 
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
-      } else {
-        this.cb.call(this.vm, value, oldValue);
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
       }
     }
   }
-};
-
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
-
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
+}
 
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
   }
-};
-
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
-
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
-    }
-    this.active = false;
+  if (isObject(data.class)) {
+    traverse(data.class);
   }
-};
+}
 
 /*  */
 
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
 
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
 
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
+  /* istanbul ignore else */
+  if (process.env.NODE_ENV !== 'production') {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
   } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, null, true);
   }
 }
 
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
+var currentRenderingInstance = null;
+
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
+    var vm = this;
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
+    }
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
         warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
           vm
         );
       }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
-        }
-      });
-    } else {
-      defineReactive(props, key, value);
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
+      vnode = createEmptyVNode();
     }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
   };
+}
 
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
 }
 
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
   }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
-      }
-    }
-    if (props && hasOwn(props, key)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
-    }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
   }
-  // observe data
-  observe(data, true /* asRootData */);
-}
 
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
   }
-}
 
-var computedWatcherOptions = { lazy: true };
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
 
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
 
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (process.env.NODE_ENV !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
-    }
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
 
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
       );
-    }
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
 
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else if (process.env.NODE_ENV !== 'production') {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                process.env.NODE_ENV !== 'production'
+                  ? ("timeout (" + (res.timeout) + "ms)")
+                  : null
+              );
+            }
+          }, res.timeout);
+        }
       }
     }
-  }
-}
 
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
   }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
 }
 
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
+/*  */
+
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
       }
-      return watcher.value
     }
   }
 }
 
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
-      }
-    }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
+/*  */
+
+/*  */
+
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
   }
 }
 
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
-      }
-    } else {
-      createWatcher(vm, key, handler);
+var target;
+
+function add (event, fn) {
+  target.$on(event, fn);
+}
+
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
+
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
     }
   }
 }
 
-function createWatcher (
+function updateComponentListeners (
   vm,
-  keyOrFn,
-  handler,
-  options
+  listeners,
+  oldListeners
 ) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
 }
 
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
-  }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
 
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
 
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
+  Vue.prototype.$off = function (event, fn) {
     var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
     }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
     }
-    return function unwatchFn () {
-      watcher.teardown();
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
+      }
+    }
+    return vm
+  };
+
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    if (process.env.NODE_ENV !== 'production') {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
     }
+    return vm
   };
 }
 
 /*  */
 
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
-  }
-}
+var activeInstance = null;
+var isUpdatingChildComponent = false;
 
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
-      } else {
-        defineReactive(vm, key, result[key]);
-      }
-    });
-    observerState.shouldConvert = true;
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
   }
 }
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
+function initLifecycle (vm) {
+  var options = vm.$options;
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
-      }
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
     }
-    return result
+    parent.$children.push(vm);
   }
+
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
+
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
 }
 
-/*  */
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
 
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
     }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
+  };
+
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
     }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
     }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
 }
 
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
+function mountComponent (
+  vm,
+  el,
+  hydrating
 ) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    if (process.env.NODE_ENV !== 'production') {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
         warn(
-          'slot v-bind without argument expects an Object',
-          this
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
         );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
+      } else {
         warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
+          'Failed to mount component: template or render function not defined.',
+          vm
         );
       }
-      slotNodes._rendered = true;
     }
-    nodes = slotNodes || fallback;
   }
+  callHook(vm, 'beforeMount');
 
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
+  var updateComponent;
+  /* istanbul ignore if */
+  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
+    };
   } else {
-    return nodes
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
   }
-}
 
-/*  */
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
 }
 
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
+function updateChildComponent (
+  vm,
+  propsData,
+  listeners,
+  parentVnode,
+  renderChildren
 ) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = true;
   }
-}
 
-/*  */
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
 
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
 
-      for (var key in value) loop( key );
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
+  }
+  vm.$options._renderChildren = renderChildren;
+
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
+
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
     }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
   }
-  return data
-}
 
-/*  */
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
 
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
   }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = false;
+  }
 }
 
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
-    }
-  } else {
-    markStaticNode(tree, key, isOnce);
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
   }
+  return false
 }
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
 }
 
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
     }
   }
-  return data
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
 }
 
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
 }
 
 /*  */
 
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
+var MAX_UPDATE_COUNT = 100;
 
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
 
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  if (process.env.NODE_ENV !== 'production') {
+    circular = {};
   }
+  waiting = flushing = false;
+}
 
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
-      }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
   }
 }
 
-installRenderHelpers(FunctionalRenderContext.prototype);
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
 
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
     }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
   }
 
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
 
-  var vnode = options.render.call(null, renderContext._c, renderContext);
+  resetSchedulerState();
 
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
-    }
-  }
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
 
-  return vnode
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
 }
 
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+      callHook(vm, 'updated');
+    }
   }
 }
 
-/*  */
-
-
-
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
 
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
 
-// Updates the state of the component to weex native render engine.
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
+    }
+  }
+}
 
 /*  */
 
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
-
-// listening on native callback
 
-/*  */
 
-/*  */
+var uid$2 = 0;
 
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = process.env.NODE_ENV !== 'production'
+    ? expOrFn.toString()
+    : '';
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
       );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     }
-  },
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
 
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
+    }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
+    }
+    popTarget();
+    this.cleanupDeps();
+  }
+  return value
+};
 
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
     }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
+  }
+};
+
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
     }
-  },
+  }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
+
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
+  }
+};
 
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        var info = "callback for watcher \"" + (this.expression) + "\"";
+        invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
       } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
+        this.cb.call(this.vm, value, oldValue);
       }
     }
   }
 };
 
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  var baseCtor = context.$options._base;
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
 
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
   }
+};
 
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
     }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
     }
+    this.active = false;
   }
+};
 
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
+/*  */
 
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
 
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
 
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
   }
-
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
-
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
-
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
-    }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
   }
-
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
-
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
-
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
 }
 
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
   }
-  return new vnode.componentOptions.Ctor(options)
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    } else {
+      defineReactive$$1(props, key, value);
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
+  };
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
 }
 
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    process.env.NODE_ENV !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
   }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    if (process.env.NODE_ENV !== 'production') {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
   }
+  // observe data
+  observe(data, true /* asRootData */);
 }
 
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
   }
 }
 
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
+var computedWatcherOptions = { lazy: true };
 
-/*  */
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
 
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (process.env.NODE_ENV !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
 
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else if (process.env.NODE_ENV !== 'production') {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+      }
+    }
   }
-  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
+function defineComputed (
+  target,
+  key,
+  userDef
 ) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
   }
-  // warn against non-primitive key
   if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
       warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
       );
-    }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
+    };
   }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
   }
 }
 
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
   }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
       }
     }
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
   }
 }
 
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
+      }
+    } else {
+      createWatcher(vm, key, handler);
+    }
+  }
+}
 
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  } else {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, null, true);
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
   }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
+  }
+  return vm.$watch(expOrFn, handler, options)
 }
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  if (process.env.NODE_ENV !== 'production') {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
 
-  Vue.prototype._render = function () {
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
     var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
-
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
     }
-
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      } else {
-        vnode = vm._vnode;
-      }
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+      pushTarget();
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+      popTarget();
     }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
+    return function unwatchFn () {
+      watcher.teardown();
     }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
   };
 }
 
 /*  */
 
-var uid = 0;
+var uid$3 = 0;
 
 function initMixin (Vue) {
   Vue.prototype._init = function (options) {
     var vm = this;
     // a uid
-    vm._uid = uid++;
+    vm._uid = uid$3++;
 
     var startTag, endTag;
     /* istanbul ignore if */
@@ -4574,8 +5040,6 @@ function initInternalComponent (vm, options) {
   var parentVnode = options._parentVnode;
   opts.parent = options.parent;
   opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
 
   var vnodeComponentOptions = parentVnode.componentOptions;
   opts.propsData = vnodeComponentOptions.propsData;
@@ -4616,50 +5080,30 @@ function resolveConstructorOptions (Ctor) {
 function resolveModifiedOptions (Ctor) {
   var modified;
   var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
   var sealed = Ctor.sealedOptions;
   for (var key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+      modified[key] = latest[key];
     }
   }
   return modified
 }
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
+function Vue (options) {
   if (process.env.NODE_ENV !== 'production' &&
-    !(this instanceof Vue$3)
+    !(this instanceof Vue)
   ) {
     warn('Vue is a constructor and should be called with the `new` keyword');
   }
   this._init(options);
 }
 
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
 
 /*  */
 
@@ -4818,6 +5262,10 @@ function initAssetRegisters (Vue) {
 
 /*  */
 
+
+
+
+
 function getComponentName (opts) {
   return opts && (opts.Ctor.options.name || opts.tag)
 }
@@ -4839,9 +5287,9 @@ function pruneCache (keepAliveInstance, filter) {
   var keys = keepAliveInstance.keys;
   var _vnode = keepAliveInstance._vnode;
   for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
+    var entry = cache[key];
+    if (entry) {
+      var name = entry.name;
       if (name && !filter(name)) {
         pruneCacheEntry(cache, key, keys, _vnode);
       }
@@ -4855,9 +5303,9 @@ function pruneCacheEntry (
   keys,
   current
 ) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
+  var entry = cache[key];
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy();
   }
   cache[key] = null;
   remove(keys, key);
@@ -4875,26 +5323,57 @@ var KeepAlive = {
     max: [String, Number]
   },
 
+  methods: {
+    cacheVNode: function cacheVNode() {
+      var ref = this;
+      var cache = ref.cache;
+      var keys = ref.keys;
+      var vnodeToCache = ref.vnodeToCache;
+      var keyToCache = ref.keyToCache;
+      if (vnodeToCache) {
+        var tag = vnodeToCache.tag;
+        var componentInstance = vnodeToCache.componentInstance;
+        var componentOptions = vnodeToCache.componentOptions;
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag: tag,
+          componentInstance: componentInstance,
+        };
+        keys.push(keyToCache);
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode);
+        }
+        this.vnodeToCache = null;
+      }
+    }
+  },
+
   created: function created () {
     this.cache = Object.create(null);
     this.keys = [];
   },
 
   destroyed: function destroyed () {
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
+    }
+  },
+
+  mounted: function mounted () {
     var this$1 = this;
 
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
-    }
+    this.cacheVNode();
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
   },
 
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
+  updated: function updated () {
+    this.cacheVNode();
   },
 
   render: function render () {
@@ -4930,12 +5409,9 @@ var KeepAlive = {
         remove(keys, key);
         keys.push(key);
       } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
+        // delay setting the cache until update
+        this.vnodeToCache = vnode;
+        this.keyToCache = key;
       }
 
       vnode.data.keepAlive = true;
@@ -4970,13 +5446,19 @@ function initGlobalAPI (Vue) {
     warn: warn,
     extend: extend,
     mergeOptions: mergeOptions,
-    defineReactive: defineReactive
+    defineReactive: defineReactive$$1
   };
 
   Vue.set = set;
   Vue.delete = del;
   Vue.nextTick = nextTick;
 
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
   Vue.options = Object.create(null);
   ASSET_TYPES.forEach(function (type) {
     Vue.options[type + 's'] = Object.create(null);
@@ -4994,20 +5476,25 @@ function initGlobalAPI (Vue) {
   initAssetRegisters(Vue);
 }
 
-initGlobalAPI(Vue$3);
+initGlobalAPI(Vue);
 
-Object.defineProperty(Vue$3.prototype, '$isServer', {
+Object.defineProperty(Vue.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
+Object.defineProperty(Vue.prototype, '$ssrContext', {
   get: function get () {
     /* istanbul ignore next */
     return this.$vnode && this.$vnode.ssrContext
   }
 });
 
-Vue$3.version = '2.5.13';
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.14';
 
 /*  */
 
@@ -5028,12 +5515,23 @@ var mustUseProp = function (tag, type, attr) {
 
 var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
 var isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 );
 
@@ -5157,13 +5655,11 @@ var isHTMLTag = makeMap(
 // contain child elements.
 var isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 );
 
-
-
 var isReservedTag = function (tag) {
   return isHTMLTag(tag) || isSVG(tag)
 };
@@ -5281,24 +5777,23 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
+function setStyleScope (node, scopeId) {
+  node.setAttribute(scopeId, '');
 }
 
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
+var nodeOps = /*#__PURE__*/Object.freeze({
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setStyleScope: setStyleScope
 });
 
 /*  */
@@ -5320,7 +5815,7 @@ var ref = {
 
 function registerRef (vnode, isRemoval) {
   var key = vnode.data.ref;
-  if (!key) { return }
+  if (!isDef(key)) { return }
 
   var vm = vnode.context;
   var ref = vnode.componentInstance || vnode.elm;
@@ -5363,7 +5858,8 @@ var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
 
 function sameVnode (a, b) {
   return (
-    a.key === b.key && (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
       (
         a.tag === b.tag &&
         a.isComment === b.isComment &&
@@ -5371,7 +5867,6 @@ function sameVnode (a, b) {
         sameInputType(a, b)
       ) || (
         isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
         isUndef(b.asyncFactory.error)
       )
     )
@@ -5417,13 +5912,13 @@ function createPatchFunction (backend) {
   }
 
   function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
         removeNode(childElm);
       }
     }
-    remove.listeners = listeners;
-    return remove
+    remove$$1.listeners = listeners;
+    return remove$$1
   }
 
   function removeNode (el) {
@@ -5451,7 +5946,25 @@ function createPatchFunction (backend) {
   }
 
   var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     vnode.isRootInsert = !nested; // for transition enter check
     if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
       return
@@ -5474,6 +5987,7 @@ function createPatchFunction (backend) {
           );
         }
       }
+
       vnode.elm = vnode.ns
         ? nodeOps.createElementNS(vnode.ns, tag)
         : nodeOps.createElement(tag, vnode);
@@ -5505,7 +6019,7 @@ function createPatchFunction (backend) {
     if (isDef(i)) {
       var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
       if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
+        i(vnode, false /* hydrating */);
       }
       // after calling the init hook, if the vnode is a child component
       // it should've created a child instance and mounted it. the child
@@ -5513,6 +6027,7 @@ function createPatchFunction (backend) {
       // in that case we can just return the element and be done.
       if (isDef(vnode.componentInstance)) {
         initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
         if (isTrue(isReactivated)) {
           reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
         }
@@ -5564,7 +6079,7 @@ function createPatchFunction (backend) {
   function insert (parent, elm, ref$$1) {
     if (isDef(parent)) {
       if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
           nodeOps.insertBefore(parent, elm, ref$$1);
         }
       } else {
@@ -5579,7 +6094,7 @@ function createPatchFunction (backend) {
         checkDuplicateKeys(children);
       }
       for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
       }
     } else if (isPrimitive(vnode.text)) {
       nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
@@ -5610,12 +6125,12 @@ function createPatchFunction (backend) {
   function setScope (vnode) {
     var i;
     if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     } else {
       var ancestor = vnode;
       while (ancestor) {
         if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
+          nodeOps.setStyleScope(vnode.elm, i);
         }
         ancestor = ancestor.parent;
       }
@@ -5626,13 +6141,13 @@ function createPatchFunction (backend) {
       i !== vnode.fnContext &&
       isDef(i = i.$options._scopeId)
     ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     }
   }
 
   function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
     for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
     }
   }
 
@@ -5650,7 +6165,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+  function removeVnodes (vnodes, startIdx, endIdx) {
     for (; startIdx <= endIdx; ++startIdx) {
       var ch = vnodes[startIdx];
       if (isDef(ch)) {
@@ -5719,20 +6234,20 @@ function createPatchFunction (backend) {
       } else if (isUndef(oldEndVnode)) {
         oldEndVnode = oldCh[--oldEndIdx];
       } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         oldStartVnode = oldCh[++oldStartIdx];
         newStartVnode = newCh[++newStartIdx];
       } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         oldEndVnode = oldCh[--oldEndIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
         oldStartVnode = oldCh[++oldStartIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
         oldEndVnode = oldCh[--oldEndIdx];
         newStartVnode = newCh[++newStartIdx];
@@ -5742,16 +6257,16 @@ function createPatchFunction (backend) {
           ? oldKeyToIdx[newStartVnode.key]
           : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
         if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
         } else {
           vnodeToMove = oldCh[idxInOld];
           if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
           } else {
             // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
           }
         }
         newStartVnode = newCh[++newStartIdx];
@@ -5761,7 +6276,7 @@ function createPatchFunction (backend) {
       refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
       addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
     } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
     }
   }
 
@@ -5790,11 +6305,23 @@ function createPatchFunction (backend) {
     }
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
     if (oldVnode === vnode) {
       return
     }
 
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     var elm = vnode.elm = oldVnode.elm;
 
     if (isTrue(oldVnode.isAsyncPlaceholder)) {
@@ -5835,10 +6362,13 @@ function createPatchFunction (backend) {
       if (isDef(oldCh) && isDef(ch)) {
         if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
       } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch);
+        }
         if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
         addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
       } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
+        removeVnodes(oldCh, 0, oldCh.length - 1);
       } else if (isDef(oldVnode.text)) {
         nodeOps.setTextContent(elm, '');
       }
@@ -5976,7 +6506,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
     if (isUndef(vnode)) {
       if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
       return
@@ -5988,12 +6518,12 @@ function createPatchFunction (backend) {
     if (isUndef(oldVnode)) {
       // empty mount (likely as component), create new root element
       isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
+      createElm(vnode, insertedVnodeQueue);
     } else {
       var isRealElement = isDef(oldVnode.nodeType);
       if (!isRealElement && sameVnode(oldVnode, vnode)) {
         // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
       } else {
         if (isRealElement) {
           // mounting to a real element
@@ -6024,7 +6554,7 @@ function createPatchFunction (backend) {
 
         // replacing existing element
         var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
+        var parentElm = nodeOps.parentNode(oldElm);
 
         // create new node
         createElm(
@@ -6033,7 +6563,7 @@ function createPatchFunction (backend) {
           // extremely rare edge case: do not insert if old element is in a
           // leaving transition. Only happens when combining transition +
           // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
+          oldElm._leaveCb ? null : parentElm,
           nodeOps.nextSibling(oldElm)
         );
 
@@ -6068,8 +6598,8 @@ function createPatchFunction (backend) {
         }
 
         // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
         } else if (isDef(oldVnode.tag)) {
           invokeDestroyHook(oldVnode);
         }
@@ -6119,6 +6649,7 @@ function _update (oldVnode, vnode) {
     } else {
       // existing directive, update
       dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
       callHook$1(dir, 'update', vnode, oldVnode);
       if (dir.def && dir.def.componentUpdated) {
         dirsWithPostpatch.push(dir);
@@ -6225,7 +6756,7 @@ function updateAttrs (oldVnode, vnode) {
     cur = attrs[key];
     old = oldAttrs[key];
     if (old !== cur) {
-      setAttr(elm, key, cur);
+      setAttr(elm, key, cur, vnode.data.pre);
     }
   }
   // #4391: in IE9, setting type can reset value for input[type=radio]
@@ -6245,8 +6776,10 @@ function updateAttrs (oldVnode, vnode) {
   }
 }
 
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
+function setAttr (el, key, value, isInPre) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value);
+  } else if (isBooleanAttr(key)) {
     // set attribute for blank value
     // e.g. <option disabled>Select one</option>
     if (isFalsyAttrValue(value)) {
@@ -6260,7 +6793,7 @@ function setAttr (el, key, value) {
       el.setAttribute(key, value);
     }
   } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
+    el.setAttribute(key, convertEnumeratedValue(key, value));
   } else if (isXlink(key)) {
     if (isFalsyAttrValue(value)) {
       el.removeAttributeNS(xlinkNS, getXlinkProp(key));
@@ -6268,28 +6801,32 @@ function setAttr (el, key, value) {
       el.setAttributeNS(xlinkNS, key, value);
     }
   } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        var blocker = function (e) {
-          e.stopImmediatePropagation();
-          el.removeEventListener('input', blocker);
-        };
-        el.addEventListener('input', blocker);
-        // $flow-disable-line
-        el.__ieph = true; /* IE placeholder patched */
-      }
-      el.setAttribute(key, value);
+    baseSetAttr(el, key, value);
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key);
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      var blocker = function (e) {
+        e.stopImmediatePropagation();
+        el.removeEventListener('input', blocker);
+      };
+      el.addEventListener('input', blocker);
+      // $flow-disable-line
+      el.__ieph = true; /* IE placeholder patched */
     }
+    el.setAttribute(key, value);
   }
 }
 
@@ -6340,39 +6877,8 @@ var klass = {
 
 /*  */
 
-
-
-
-
-
-
-
-
-// add a raw attr (use this in preTransforms)
-
-
-
-
-
-
-
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-
 /*  */
 
-/**
- * Cross-platform code generation for component v-model
- */
-
-
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-
 /*  */
 
 // in some cases, the event used has to be determined at runtime
@@ -6405,7 +6911,7 @@ function normalizeEvents (on) {
 
 var target$1;
 
-function createOnceHandler (handler, event, capture) {
+function createOnceHandler$1 (event, handler, capture) {
   var _target = target$1; // save current target element in closure
   return function onceHandler () {
     var res = handler.apply(null, arguments);
@@ -6415,17 +6921,49 @@ function createOnceHandler (handler, event, capture) {
   }
 }
 
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
 function add$1 (
-  event,
+  name,
   handler,
-  once$$1,
   capture,
   passive
 ) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    var attachedTimestamp = currentFlushTimestamp;
+    var original = handler;
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    };
+  }
   target$1.addEventListener(
-    event,
+    name,
     handler,
     supportsPassive
       ? { capture: capture, passive: passive }
@@ -6434,14 +6972,14 @@ function add$1 (
 }
 
 function remove$2 (
-  event,
+  name,
   handler,
   capture,
   _target
 ) {
   (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
+    name,
+    handler._wrapper || handler,
     capture
   );
 }
@@ -6454,7 +6992,7 @@ function updateDOMListeners (oldVnode, vnode) {
   var oldOn = oldVnode.data.on || {};
   target$1 = vnode.elm;
   normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
   target$1 = undefined;
 }
 
@@ -6465,6 +7003,8 @@ var events = {
 
 /*  */
 
+var svgContainer;
+
 function updateDOMProps (oldVnode, vnode) {
   if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
     return
@@ -6479,10 +7019,11 @@ function updateDOMProps (oldVnode, vnode) {
   }
 
   for (key in oldProps) {
-    if (isUndef(props[key])) {
+    if (!(key in props)) {
       elm[key] = '';
     }
   }
+
   for (key in props) {
     cur = props[key];
     // ignore children if the node has textContent or innerHTML,
@@ -6498,7 +7039,7 @@ function updateDOMProps (oldVnode, vnode) {
       }
     }
 
-    if (key === 'value') {
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
       // store value as _value as well since
       // non-string values will be stringified
       elm._value = cur;
@@ -6507,8 +7048,29 @@ function updateDOMProps (oldVnode, vnode) {
       if (shouldUpdateValue(elm, strCur)) {
         elm.value = strCur;
       }
-    } else {
-      elm[key] = cur;
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div');
+      svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+      var svg = svgContainer.firstChild;
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild);
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild);
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur;
+      } catch (e) {}
     }
   }
 }
@@ -6538,10 +7100,6 @@ function isDirtyWithModifiers (elm, newVal) {
   var value = elm.value;
   var modifiers = elm._vModifiers; // injected by v-model runtime
   if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
     if (modifiers.number) {
       return toNumber(value) !== toNumber(newVal)
     }
@@ -6636,7 +7194,7 @@ var setProp = function (el, name, val) {
   if (cssVarRE.test(name)) {
     el.style.setProperty(name, val);
   } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
   } else {
     var normalizedName = normalize(name);
     if (Array.isArray(val)) {
@@ -6720,6 +7278,8 @@ var style = {
 
 /*  */
 
+var whitespaceRE = /\s+/;
+
 /**
  * Add class with compatibility for SVG since classList is not supported on
  * SVG elements in IE
@@ -6733,7 +7293,7 @@ function addClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
     } else {
       el.classList.add(cls);
     }
@@ -6758,7 +7318,7 @@ function removeClass (el, cls) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
+      cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
     } else {
       el.classList.remove(cls);
     }
@@ -6782,20 +7342,20 @@ function removeClass (el, cls) {
 
 /*  */
 
-function resolveTransition (def) {
-  if (!def) {
+function resolveTransition (def$$1) {
+  if (!def$$1) {
     return
   }
   /* istanbul ignore else */
-  if (typeof def === 'object') {
+  if (typeof def$$1 === 'object') {
     var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
     }
-    extend(res, def);
+    extend(res, def$$1);
     return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
   }
 }
 
@@ -6898,11 +7458,12 @@ var transformRE = /\b(transform|all)(,|$)/;
 
 function getTransitionInfo (el, expectedType) {
   var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
+  // JSDOM may return undefined for transition properties
+  var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+  var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
   var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
+  var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+  var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
   var animationTimeout = getTimeout(animationDelays, animationDurations);
 
   var type;
@@ -6956,8 +7517,12 @@ function getTimeout (delays, durations) {
   }))
 }
 
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
 function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
 }
 
 /*  */
@@ -7006,8 +7571,8 @@ function enter (vnode, toggleDisplay) {
   var context = activeInstance;
   var transitionNode = activeInstance.$vnode;
   while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
     context = transitionNode.context;
+    transitionNode = transitionNode.parent;
   }
 
   var isAppear = !context._isMounted || !vnode.isRootInsert;
@@ -7089,13 +7654,15 @@ function enter (vnode, toggleDisplay) {
     addTransitionClass(el, startClass);
     addTransitionClass(el, activeClass);
     nextFrame(function () {
-      addTransitionClass(el, toClass);
       removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
+      if (!cb.cancelled) {
+        addTransitionClass(el, toClass);
+        if (!userWantsControl) {
+          if (isValidDuration(explicitEnterDuration)) {
+            setTimeout(cb, explicitEnterDuration);
+          } else {
+            whenTransitionEnds(el, type, cb);
+          }
         }
       }
     });
@@ -7187,7 +7754,7 @@ function leave (vnode, rm) {
       return
     }
     // record leaving element
-    if (!vnode.data.show) {
+    if (!vnode.data.show && el.parentNode) {
       (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
     }
     beforeLeave && beforeLeave(el);
@@ -7195,13 +7762,15 @@ function leave (vnode, rm) {
       addTransitionClass(el, leaveClass);
       addTransitionClass(el, leaveActiveClass);
       nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
         removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
+        if (!cb.cancelled) {
+          addTransitionClass(el, leaveToClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitLeaveDuration)) {
+              setTimeout(cb, explicitLeaveDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
           }
         }
       });
@@ -7324,15 +7893,13 @@ var directive = {
     } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
       el._vModifiers = binding.modifiers;
       if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart);
+        el.addEventListener('compositionend', onCompositionEnd);
         // Safari < 10.2 & UIWebView doesn't fire compositionend when
         // switching focus before confirming composition choice
         // this also fixes the issue where some browsers e.g. iOS Chrome
         // fires "change" instead of "input" on autocomplete.
         el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
         /* istanbul ignore if */
         if (isIE9) {
           el.vmodel = true;
@@ -7466,7 +8033,7 @@ var show = {
     var oldValue = ref.oldValue;
 
     /* istanbul ignore if */
-    if (value === oldValue) { return }
+    if (!value === !oldValue) { return }
     vnode = locateNode(vnode);
     var transition$$1 = vnode.data && vnode.data.transition;
     if (transition$$1) {
@@ -7505,9 +8072,6 @@ var platformDirectives = {
 
 /*  */
 
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
 var transitionProps = {
   name: String,
   appear: Boolean,
@@ -7573,6 +8137,10 @@ function isSameChild (child, oldChild) {
   return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
 var Transition = {
   name: 'transition',
   props: transitionProps,
@@ -7587,7 +8155,7 @@ var Transition = {
     }
 
     // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
+    children = children.filter(isNotTextNode);
     /* istanbul ignore if */
     if (!children.length) {
       return
@@ -7652,7 +8220,7 @@ var Transition = {
 
     // mark v-show
     // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
       child.data.show = true;
     }
 
@@ -7694,17 +8262,6 @@ var Transition = {
 
 /*  */
 
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
-
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
-
 var props = extend({
   tag: String,
   moveClass: String
@@ -7715,6 +8272,25 @@ delete props.mode;
 var TransitionGroup = {
   props: props,
 
+  beforeMount: function beforeMount () {
+    var this$1 = this;
+
+    var update = this._update;
+    this._update = function (vnode, hydrating) {
+      var restoreActiveInstance = setActiveInstance(this$1);
+      // force removing pass
+      this$1.__patch__(
+        this$1._vnode,
+        this$1.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      );
+      this$1._vnode = this$1.kept;
+      restoreActiveInstance();
+      update.call(this$1, vnode, hydrating);
+    };
+  },
+
   render: function render (h) {
     var tag = this.tag || this.$vnode.data.tag || 'span';
     var map = Object.create(null);
@@ -7758,17 +8334,6 @@ var TransitionGroup = {
     return h(tag, null, children)
   },
 
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
-
   updated: function updated () {
     var children = this.prevChildren;
     var moveClass = this.moveClass || ((this.name || 'v') + '-move');
@@ -7794,6 +8359,9 @@ var TransitionGroup = {
         addTransitionClass(el, moveClass);
         s.transform = s.WebkitTransform = s.transitionDuration = '';
         el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
           if (!e || /transform$/.test(e.propertyName)) {
             el.removeEventListener(transitionEndEvent, cb);
             el._moveCb = null;
@@ -7869,21 +8437,21 @@ var platformComponents = {
 /*  */
 
 // install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag;
+Vue.config.isReservedAttr = isReservedAttr;
+Vue.config.getTagNamespace = getTagNamespace;
+Vue.config.isUnknownElement = isUnknownElement;
 
 // install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
+extend(Vue.options.directives, platformDirectives);
+extend(Vue.options.components, platformComponents);
 
 // install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
+Vue.prototype.__patch__ = inBrowser ? patch : noop;
 
 // public mount method
-Vue$3.prototype.$mount = function (
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -7893,29 +8461,35 @@ Vue$3.prototype.$mount = function (
 
 // devtools global hook
 /* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if (process.env.NODE_ENV !== 'production' && isChrome) {
+if (inBrowser) {
+  setTimeout(function () {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue);
+      } else if (
+        process.env.NODE_ENV !== 'production' &&
+        process.env.NODE_ENV !== 'test'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        );
+      }
+    }
+    if (process.env.NODE_ENV !== 'production' &&
+      process.env.NODE_ENV !== 'test' &&
+      config.productionTip !== false &&
+      typeof console !== 'undefined'
+    ) {
       console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
+        "You are running Vue in development mode.\n" +
+        "Make sure to turn on production mode when deploying for production.\n" +
+        "See more tips at https://vuejs.org/guide/deployment.html"
       );
     }
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
-  }
-}, 0);
+  }, 0);
+}
 
 /*  */
 
-export default Vue$3;
+export default Vue;
diff --git a/dist/vue.runtime.js b/dist/vue.runtime.js
index c664f8b4c10..594bf05435a 100644
--- a/dist/vue.runtime.js
+++ b/dist/vue.runtime.js
@@ -1,6260 +1,6793 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-	typeof define === 'function' && define.amd ? define(factory) :
-	(global.Vue = factory());
-}(this, (function () { 'use strict';
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = global || self, global.Vue = factory());
+}(this, function () { 'use strict';
 
-/*  */
+  /*  */
 
-var emptyObject = Object.freeze({});
+  var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-function isUndef (v) {
-  return v === undefined || v === null
-}
-
-function isDef (v) {
-  return v !== undefined && v !== null
-}
-
-function isTrue (v) {
-  return v === true
-}
-
-function isFalse (v) {
-  return v === false
-}
-
-/**
- * Check if value is primitive
- */
-function isPrimitive (value) {
-  return (
-    typeof value === 'string' ||
-    typeof value === 'number' ||
-    // $flow-disable-line
-    typeof value === 'symbol' ||
-    typeof value === 'boolean'
-  )
-}
-
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
+  }
 
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
+  function isDef (v) {
+    return v !== undefined && v !== null
+  }
 
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
+  function isTrue (v) {
+    return v === true
+  }
 
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
+  function isFalse (v) {
+    return v === false
+  }
 
-function isRegExp (v) {
-  return _toString.call(v) === '[object RegExp]'
-}
+  /**
+   * Check if value is primitive.
+   */
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
+  }
 
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
+  /**
+   * Quick object check - this is primarily used to tell
+   * Objects from primitive values when we know the value
+   * is a JSON-compliant type.
+   */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
+  }
 
-/**
- * Convert a value to a string that is actually rendered.
- */
-function toString (val) {
-  return val == null
-    ? ''
-    : typeof val === 'object'
-      ? JSON.stringify(val, null, 2)
-      : String(val)
-}
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-function toNumber (val) {
-  var n = parseFloat(val);
-  return isNaN(n) ? val : n
-}
-
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
 
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
+  }
 
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
+  /**
+   * Strict object type check. Only returns true
+   * for plain JavaScript objects.
+   */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
   }
-}
 
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
+  function isRegExp (v) {
+    return _toString.call(v) === '[object RegExp]'
+  }
 
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
+  /**
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
 
-/**
- * Capitalize a string.
- */
-var capitalize = cached(function (str) {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
+  function isPromise (val) {
+    return (
+      isDef(val) &&
+      typeof val.then === 'function' &&
+      typeof val.catch === 'function'
+    )
+  }
 
-/**
- * Hyphenate a camelCase string.
- */
-var hyphenateRE = /\B([A-Z])/g;
-var hyphenate = cached(function (str) {
-  return str.replace(hyphenateRE, '-$1').toLowerCase()
-});
+  /**
+   * Convert a value to a string that is actually rendered.
+   */
+  function toString (val) {
+    return val == null
+      ? ''
+      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+        ? JSON.stringify(val, null, 2)
+        : String(val)
+  }
 
-/**
- * Simple bind, faster than native
- */
-function bind (fn, ctx) {
-  function boundFn (a) {
-    var l = arguments.length;
-    return l
-      ? l > 1
-        ? fn.apply(ctx, arguments)
-        : fn.call(ctx, a)
-      : fn.call(ctx)
-  }
-  // record original fn length
-  boundFn._length = fn.length;
-  return boundFn
-}
-
-/**
- * Convert an Array-like object to a real Array.
- */
-function toArray (list, start) {
-  start = start || 0;
-  var i = list.length - start;
-  var ret = new Array(i);
-  while (i--) {
-    ret[i] = list[i + start];
-  }
-  return ret
-}
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
+  /**
+   * Convert an input value to a number for persistence.
+   * If the conversion fails, return original string.
+   */
+  function toNumber (val) {
+    var n = parseFloat(val);
+    return isNaN(n) ? val : n
   }
-  return to
-}
 
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  var res = {};
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i]) {
-      extend(res, arr[i]);
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
     }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
   }
-  return res
-}
-
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
 
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
-
-/**
- * Generate a static keys string from compiler modules.
- */
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
 
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-function looseEqual (a, b) {
-  if (a === b) { return true }
-  var isObjectA = isObject(a);
-  var isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      var isArrayA = Array.isArray(a);
-      var isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every(function (e, i) {
-          return looseEqual(e, b[i])
-        })
-      } else if (!isArrayA && !isArrayB) {
-        var keysA = Object.keys(a);
-        var keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(function (key) {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
+  /**
+   * Remove an item from an array.
+   */
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
       }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
     }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
   }
-}
 
-function looseIndexOf (arr, val) {
-  for (var i = 0; i < arr.length; i++) {
-    if (looseEqual(arr[i], val)) { return i }
+  /**
+   * Check whether an object has the property.
+   */
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
   }
-  return -1
-}
 
-/**
- * Ensure a function is called only once.
- */
-function once (fn) {
-  var called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-var SSR_ATTR = 'data-server-rendered';
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
   /**
-   * Option merge strategies (used in core/util/options)
+   * Create a cached version of a pure function.
+   */
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
+
+  /**
+   * Camelize a hyphen-delimited string.
+   */
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
+
+  /**
+   * Capitalize a string.
    */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
+  var capitalize = cached(function (str) {
+    return str.charAt(0).toUpperCase() + str.slice(1)
+  });
 
   /**
-   * Whether to suppress warnings.
+   * Hyphenate a camelCase string.
    */
-  silent: false,
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
 
   /**
-   * Show production mode tip message on boot?
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
    */
-  productionTip: "development" !== 'production',
+
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
+
+    boundFn._length = fn.length;
+    return boundFn
+  }
+
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
+
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
 
   /**
-   * Whether to enable devtools
+   * Convert an Array-like object to a real Array.
    */
-  devtools: "development" !== 'production',
+  function toArray (list, start) {
+    start = start || 0;
+    var i = list.length - start;
+    var ret = new Array(i);
+    while (i--) {
+      ret[i] = list[i + start];
+    }
+    return ret
+  }
 
   /**
-   * Whether to record perf
+   * Mix properties into target object.
    */
-  performance: false,
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
 
   /**
-   * Error handler for watcher errors
+   * Merge an Array of Objects into a single Object.
    */
-  errorHandler: null,
+  function toObject (arr) {
+    var res = {};
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i]) {
+        extend(res, arr[i]);
+      }
+    }
+    return res
+  }
+
+  /* eslint-disable no-unused-vars */
 
   /**
-   * Warn handler for watcher warns
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
    */
-  warnHandler: null,
+  function noop (a, b, c) {}
 
   /**
-   * Ignore certain custom elements
+   * Always return false.
    */
-  ignoredElements: [],
+  var no = function (a, b, c) { return false; };
+
+  /* eslint-enable no-unused-vars */
 
   /**
-   * Custom user key aliases for v-on
+   * Return the same value.
    */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
+  var identity = function (_) { return _; };
 
   /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
+   * Check if two values are loosely equal - that is,
+   * if they are plain objects, do they have the same shape?
    */
-  isReservedTag: no,
+  function looseEqual (a, b) {
+    if (a === b) { return true }
+    var isObjectA = isObject(a);
+    var isObjectB = isObject(b);
+    if (isObjectA && isObjectB) {
+      try {
+        var isArrayA = Array.isArray(a);
+        var isArrayB = Array.isArray(b);
+        if (isArrayA && isArrayB) {
+          return a.length === b.length && a.every(function (e, i) {
+            return looseEqual(e, b[i])
+          })
+        } else if (a instanceof Date && b instanceof Date) {
+          return a.getTime() === b.getTime()
+        } else if (!isArrayA && !isArrayB) {
+          var keysA = Object.keys(a);
+          var keysB = Object.keys(b);
+          return keysA.length === keysB.length && keysA.every(function (key) {
+            return looseEqual(a[key], b[key])
+          })
+        } else {
+          /* istanbul ignore next */
+          return false
+        }
+      } catch (e) {
+        /* istanbul ignore next */
+        return false
+      }
+    } else if (!isObjectA && !isObjectB) {
+      return String(a) === String(b)
+    } else {
+      return false
+    }
+  }
 
   /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
+   * Return the first index at which a loosely equal value can be
+   * found in the array (if value is a plain object, the array must
+   * contain an object of the same shape), or -1 if it is not present.
    */
-  isReservedAttr: no,
+  function looseIndexOf (arr, val) {
+    for (var i = 0; i < arr.length; i++) {
+      if (looseEqual(arr[i], val)) { return i }
+    }
+    return -1
+  }
 
   /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
+   * Ensure a function is called only once.
    */
-  isUnknownElement: no,
+  function once (fn) {
+    var called = false;
+    return function () {
+      if (!called) {
+        called = true;
+        fn.apply(this, arguments);
+      }
+    }
+  }
+
+  var SSR_ATTR = 'data-server-rendered';
+
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
+
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
+
+  /*  */
+
+
+
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
+  });
+
+  /*  */
 
   /**
-   * Get the namespace of an element
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
    */
-  getTagNamespace: noop,
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
 
   /**
-   * Parse the real tag name for the specific platform.
+   * Check if a string starts with $ or _
    */
-  parsePlatformTagName: identity,
+  function isReserved (str) {
+    var c = (str + '').charCodeAt(0);
+    return c === 0x24 || c === 0x5F
+  }
 
   /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
+   * Define a property.
    */
-  mustUseProp: no,
+  function def (obj, key, val, enumerable) {
+    Object.defineProperty(obj, key, {
+      value: val,
+      enumerable: !!enumerable,
+      writable: true,
+      configurable: true
+    });
+  }
 
   /**
-   * Exposed for legacy reasons
+   * Parse simple path.
    */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
+  var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
+  function parsePath (path) {
+    if (bailRE.test(path)) {
+      return
+    }
+    var segments = path.split('.');
+    return function (obj) {
+      for (var i = 0; i < segments.length; i++) {
+        if (!obj) { return }
+        obj = obj[segments[i]];
+      }
+      return obj
+    }
+  }
 
-/*  */
+  /*  */
 
-/**
- * Check if a string starts with $ or _
- */
-function isReserved (str) {
-  var c = (str + '').charCodeAt(0);
-  return c === 0x24 || c === 0x5F
-}
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
 
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
+  // Browser environment sniffing
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
 
-/**
- * Parse simple path.
- */
-var bailRE = /[^\w.$]/;
-function parsePath (path) {
-  if (bailRE.test(path)) {
-    return
-  }
-  var segments = path.split('.');
-  return function (obj) {
-    for (var i = 0; i < segments.length; i++) {
-      if (!obj) { return }
-      obj = obj[segments[i]];
-    }
-    return obj
-  }
-}
-
-/*  */
-
-
-// can we use __proto__?
-var hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
-
-var supportsPassive = false;
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        supportsPassive = true;
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+
+  var supportsPassive = false;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
+          /* istanbul ignore next */
+          supportsPassive = true;
+        }
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
+  }
+
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
+      }
     }
+    return _isServer
+  };
+
+  // detect devtools
+  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+
+  /* istanbul ignore next */
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
+  }
+
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
+    // use native Set when available.
+    _Set = Set;
+  } else {
+    // a non-standard Set polyfill that only works with primitive keys.
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
+      }
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
+      };
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
+      };
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
+      };
+
+      return Set;
+    }());
   }
-  return _isServer
-};
 
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
+  /*  */
 
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
 
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
 
-var _Set;
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  _Set = Set;
-} else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
-    function Set () {
-      this.set = Object.create(null);
-    }
-    Set.prototype.has = function has (key) {
-      return this.set[key] === true
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
+
+      if (config.warnHandler) {
+        config.warnHandler.call(null, msg, vm, trace);
+      } else if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
+      }
+    };
+
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
     };
-    Set.prototype.add = function add (key) {
-      this.set[key] = true;
+
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
+
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
     };
-    Set.prototype.clear = function clear () {
-      this.set = Object.create(null);
+
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
     };
 
-    return Set;
-  }());
-}
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
+          }
+          tree.push(vm);
+          vm = vm.$parent;
+        }
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
+      } else {
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+      }
+    };
+  }
 
-/*  */
+  /*  */
 
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
+  var uid = 0;
 
-{
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
+  /**
+   * A dep is an observable that can have multiple
+   * directives subscribing to it.
+   */
+  var Dep = function Dep () {
+    this.id = uid++;
+    this.subs = [];
+  };
 
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
+  Dep.prototype.addSub = function addSub (sub) {
+    this.subs.push(sub);
+  };
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
-    }
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
   };
 
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
     }
   };
 
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    if (!config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort(function (a, b) { return a.id - b.id; });
     }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
+    for (var i = 0, l = subs.length; i < l; i++) {
+      subs[i].update();
     }
-
-    return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
-    )
   };
 
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
-    }
-    return res
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+  var targetStack = [];
+
+  function pushTarget (target) {
+    targetStack.push(target);
+    Dep.target = target;
+  }
+
+  function popTarget () {
+    targetStack.pop();
+    Dep.target = targetStack[targetStack.length - 1];
+  }
+
+  /*  */
+
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
   };
 
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
-        }
-        tree.push(vm);
-        vm = vm.$parent;
-      }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
-    }
+  var prototypeAccessors = { child: { configurable: true } };
+
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
   };
-}
 
-/*  */
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
 
+  var createEmptyVNode = function (text) {
+    if ( text === void 0 ) text = '';
 
-var uid$1 = 0;
+    var node = new VNode();
+    node.text = text;
+    node.isComment = true;
+    return node
+  };
 
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid$1++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-var targetStack = [];
-
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
-}
-
-function popTarget () {
-  Dep.target = targetStack.pop();
-}
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-var createEmptyVNode = function (text) {
-  if ( text === void 0 ) text = '';
-
-  var node = new VNode();
-  node.text = text;
-  node.isComment = true;
-  return node
-};
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
-  var cloned = new VNode(
-    vnode.tag,
-    vnode.data,
-    vnode.children,
-    vnode.text,
-    vnode.elm,
-    vnode.context,
-    componentOptions,
-    vnode.asyncFactory
-  );
-  cloned.ns = vnode.ns;
-  cloned.isStatic = vnode.isStatic;
-  cloned.key = vnode.key;
-  cloned.isComment = vnode.isComment;
-  cloned.fnContext = vnode.fnContext;
-  cloned.fnOptions = vnode.fnOptions;
-  cloned.fnScopeId = vnode.fnScopeId;
-  cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
-  return cloned
-}
-
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
+  function createTextVNode (val) {
+    return new VNode(undefined, undefined, undefined, String(val))
+  }
+
+  // optimized shallow clone
+  // used for static nodes and slot nodes because they may be reused across
+  // multiple renders, cloning them avoids errors when DOM manipulations rely
+  // on their elm reference.
+  function cloneVNode (vnode) {
+    var cloned = new VNode(
+      vnode.tag,
+      vnode.data,
+      // #7975
+      // clone children array to avoid mutating original in case of cloning
+      // a child.
+      vnode.children && vnode.children.slice(),
+      vnode.text,
+      vnode.elm,
+      vnode.context,
+      vnode.componentOptions,
+      vnode.asyncFactory
+    );
+    cloned.ns = vnode.ns;
+    cloned.isStatic = vnode.isStatic;
+    cloned.key = vnode.key;
+    cloned.isComment = vnode.isComment;
+    cloned.fnContext = vnode.fnContext;
+    cloned.fnOptions = vnode.fnOptions;
+    cloned.fnScopeId = vnode.fnScopeId;
+    cloned.asyncMeta = vnode.asyncMeta;
+    cloned.isCloned = true;
+    return cloned
+  }
+
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
+   */
 
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
+  var arrayProto = Array.prototype;
+  var arrayMethods = Object.create(arrayProto);
 
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
-    }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
 
-/*  */
+  /**
+   * Intercept mutating methods and emit events
+   */
+  methodsToPatch.forEach(function (method) {
+    // cache original method
+    var original = arrayProto[method];
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
+      var result = original.apply(this, args);
+      var ob = this.__ob__;
+      var inserted;
+      switch (method) {
+        case 'push':
+        case 'unshift':
+          inserted = args;
+          break
+        case 'splice':
+          inserted = args.slice(2);
+          break
+      }
+      if (inserted) { ob.observeArray(inserted); }
+      // notify change
+      ob.dep.notify();
+      return result
+    });
+  });
 
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
+  /*  */
 
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
+  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
+  /**
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
+   */
+  var shouldObserve = true;
 
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
+  function toggleObserving (value) {
+    shouldObserve = value;
   }
-};
 
-// helpers
+  /**
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
+   * object's property keys into getter/setters that
+   * collect dependencies and dispatch updates.
+   */
+  var Observer = function Observer (value) {
+    this.value = value;
+    this.dep = new Dep();
+    this.vmCount = 0;
+    def(value, '__ob__', this);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys);
+      }
+      this.observeArray(value);
+    } else {
+      this.walk(value);
+    }
+  };
+
+  /**
+   * Walk through all properties and convert them into
+   * getter/setters. This method should only be called when
+   * value type is Object.
+   */
+  Observer.prototype.walk = function walk (obj) {
+    var keys = Object.keys(obj);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
+    }
+  };
+
+  /**
+   * Observe a list of Array items.
+   */
+  Observer.prototype.observeArray = function observeArray (items) {
+    for (var i = 0, l = items.length; i < l; i++) {
+      observe(items[i]);
+    }
+  };
+
+  // helpers
+
+  /**
+   * Augment a target Object or Array by intercepting
+   * the prototype chain using __proto__
+   */
+  function protoAugment (target, src) {
+    /* eslint-disable no-proto */
+    target.__proto__ = src;
+    /* eslint-enable no-proto */
+  }
+
+  /**
+   * Augment a target Object or Array by defining
+   * hidden properties.
+   */
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
+    for (var i = 0, l = keys.length; i < l; i++) {
+      var key = keys[i];
+      def(target, key, src[key]);
+    }
+  }
+
+  /**
+   * Attempt to create an observer instance for a value,
+   * returns the new observer if successfully observed,
+   * or the existing observer if the value already has one.
+   */
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
+    }
+    var ob;
+    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+      ob = value.__ob__;
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
+      ob = new Observer(value);
+    }
+    if (asRootData && ob) {
+      ob.vmCount++;
+    }
+    return ob
+  }
+
+  /**
+   * Define a reactive property on an Object.
+   */
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
+    var dep = new Dep();
+
+    var property = Object.getOwnPropertyDescriptor(obj, key);
+    if (property && property.configurable === false) {
+      return
+    }
+
+    // cater for pre-defined getter/setters
+    var getter = property && property.get;
+    var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
+    }
+
+    var childOb = !shallow && observe(val);
+    Object.defineProperty(obj, key, {
+      enumerable: true,
+      configurable: true,
+      get: function reactiveGetter () {
+        var value = getter ? getter.call(obj) : val;
+        if (Dep.target) {
+          dep.depend();
+          if (childOb) {
+            childOb.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
+            }
+          }
+        }
+        return value
+      },
+      set: function reactiveSetter (newVal) {
+        var value = getter ? getter.call(obj) : val;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
+        }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
+        if (setter) {
+          setter.call(obj, newVal);
+        } else {
+          val = newVal;
+        }
+        childOb = !shallow && observe(newVal);
+        dep.notify();
+      }
+    });
+  }
+
+  /**
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
+   */
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
+    }
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
+      );
+      return val
+    }
+    if (!ob) {
+      target[key] = val;
+      return val
+    }
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
+  }
+
+  /**
+   * Delete a property and trigger change if necessary.
+   */
+  function del (target, key) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.splice(key, 1);
+      return
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
+      warn(
+        'Avoid deleting properties on a Vue instance or its root $data ' +
+        '- just set it to null.'
+      );
+      return
+    }
+    if (!hasOwn(target, key)) {
+      return
+    }
+    delete target[key];
+    if (!ob) {
+      return
+    }
+    ob.dep.notify();
+  }
+
+  /**
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
+   */
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
+      }
+    }
+  }
+
+  /*  */
+
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
+
+  /**
+   * Options with restrictions
+   */
+  {
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
+        warn(
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
+        );
+      }
+      return defaultStrat(parent, child)
+    };
+  }
+
+  /**
+   * Helper that recursively merges two data objects together.
+   */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
+
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
+
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
+      }
+    }
+    return to
+  }
+
+  /**
+   * Data
+   */
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
+      }
+    } else {
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
+        } else {
+          return defaultData
+        }
+      }
+    }
+  }
+
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
+
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
+    }
+
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
+
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
+  ) {
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
+  }
+
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
+    }
+    return res
+  }
+
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
+
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
+  }
+
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
+      }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
+    }
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
+
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
+
+  /**
+   * Validate component names
+   */
+  function checkComponents (options) {
+    for (var key in options.components) {
+      validateComponentName(key);
+    }
+  }
+
+  function validateComponentName (name) {
+    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+      warn(
+        'Invalid component name: "' + name + '". Component names ' +
+        'should conform to valid custom element name in html5 specification.'
+      );
+    }
+    if (isBuiltInTag(name) || config.isReservedTag(name)) {
+      warn(
+        'Do not use built-in or reserved HTML elements as component ' +
+        'id: ' + name
+      );
+    }
+  }
+
+  /**
+   * Ensure all props option syntax are normalized into the
+   * Object-based format.
+   */
+  function normalizeProps (options, vm) {
+    var props = options.props;
+    if (!props) { return }
+    var res = {};
+    var i, val, name;
+    if (Array.isArray(props)) {
+      i = props.length;
+      while (i--) {
+        val = props[i];
+        if (typeof val === 'string') {
+          name = camelize(val);
+          res[name] = { type: null };
+        } else {
+          warn('props must be strings when using array syntax.');
+        }
+      }
+    } else if (isPlainObject(props)) {
+      for (var key in props) {
+        val = props[key];
+        name = camelize(key);
+        res[name] = isPlainObject(val)
+          ? val
+          : { type: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"props\": expected an Array or an Object, " +
+        "but got " + (toRawType(props)) + ".",
+        vm
+      );
+    }
+    options.props = res;
+  }
+
+  /**
+   * Normalize all injections into Object-based format
+   */
+  function normalizeInject (options, vm) {
+    var inject = options.inject;
+    if (!inject) { return }
+    var normalized = options.inject = {};
+    if (Array.isArray(inject)) {
+      for (var i = 0; i < inject.length; i++) {
+        normalized[inject[i]] = { from: inject[i] };
+      }
+    } else if (isPlainObject(inject)) {
+      for (var key in inject) {
+        var val = inject[key];
+        normalized[key] = isPlainObject(val)
+          ? extend({ from: key }, val)
+          : { from: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"inject\": expected an Array or an Object, " +
+        "but got " + (toRawType(inject)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Normalize raw function directives into object format.
+   */
+  function normalizeDirectives (options) {
+    var dirs = options.directives;
+    if (dirs) {
+      for (var key in dirs) {
+        var def$$1 = dirs[key];
+        if (typeof def$$1 === 'function') {
+          dirs[key] = { bind: def$$1, update: def$$1 };
+        }
+      }
+    }
+  }
+
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
+      warn(
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Merge two option objects into a new one.
+   * Core utility used in both instantiation and inheritance.
+   */
+  function mergeOptions (
+    parent,
+    child,
+    vm
+  ) {
+    {
+      checkComponents(child);
+    }
+
+    if (typeof child === 'function') {
+      child = child.options;
+    }
+
+    normalizeProps(child, vm);
+    normalizeInject(child, vm);
+    normalizeDirectives(child);
+
+    // Apply extends and mixins on the child options,
+    // but only if it is a raw options object that isn't
+    // the result of another mergeOptions call.
+    // Only merged options has the _base property.
+    if (!child._base) {
+      if (child.extends) {
+        parent = mergeOptions(parent, child.extends, vm);
+      }
+      if (child.mixins) {
+        for (var i = 0, l = child.mixins.length; i < l; i++) {
+          parent = mergeOptions(parent, child.mixins[i], vm);
+        }
+      }
+    }
+
+    var options = {};
+    var key;
+    for (key in parent) {
+      mergeField(key);
+    }
+    for (key in child) {
+      if (!hasOwn(parent, key)) {
+        mergeField(key);
+      }
+    }
+    function mergeField (key) {
+      var strat = strats[key] || defaultStrat;
+      options[key] = strat(parent[key], child[key], vm, key);
+    }
+    return options
+  }
+
+  /**
+   * Resolve an asset.
+   * This function is used because child instances need access
+   * to assets defined in its ancestor chain.
+   */
+  function resolveAsset (
+    options,
+    type,
+    id,
+    warnMissing
+  ) {
+    /* istanbul ignore if */
+    if (typeof id !== 'string') {
+      return
+    }
+    var assets = options[type];
+    // check local registration variations first
+    if (hasOwn(assets, id)) { return assets[id] }
+    var camelizedId = camelize(id);
+    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+    var PascalCaseId = capitalize(camelizedId);
+    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+    // fallback to prototype chain
+    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+    if (warnMissing && !res) {
+      warn(
+        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+        options
+      );
+    }
+    return res
+  }
+
+  /*  */
+
+
+
+  function validateProp (
+    key,
+    propOptions,
+    propsData,
+    vm
+  ) {
+    var prop = propOptions[key];
+    var absent = !hasOwn(propsData, key);
+    var value = propsData[key];
+    // boolean casting
+    var booleanIndex = getTypeIndex(Boolean, prop.type);
+    if (booleanIndex > -1) {
+      if (absent && !hasOwn(prop, 'default')) {
+        value = false;
+      } else if (value === '' || value === hyphenate(key)) {
+        // only cast empty string / same name to boolean if
+        // boolean has higher priority
+        var stringIndex = getTypeIndex(String, prop.type);
+        if (stringIndex < 0 || booleanIndex < stringIndex) {
+          value = true;
+        }
+      }
+    }
+    // check default value
+    if (value === undefined) {
+      value = getPropDefaultValue(vm, prop, key);
+      // since the default value is a fresh copy,
+      // make sure to observe it.
+      var prevShouldObserve = shouldObserve;
+      toggleObserving(true);
+      observe(value);
+      toggleObserving(prevShouldObserve);
+    }
+    {
+      assertProp(prop, key, value, vm, absent);
+    }
+    return value
+  }
+
+  /**
+   * Get the default value of a prop.
+   */
+  function getPropDefaultValue (vm, prop, key) {
+    // no default, return undefined
+    if (!hasOwn(prop, 'default')) {
+      return undefined
+    }
+    var def = prop.default;
+    // warn against non-factory defaults for Object & Array
+    if (isObject(def)) {
+      warn(
+        'Invalid default value for prop "' + key + '": ' +
+        'Props with type Object/Array must use a factory function ' +
+        'to return the default value.',
+        vm
+      );
+    }
+    // the raw prop value was also undefined from previous render,
+    // return previous default value to avoid unnecessary watcher trigger
+    if (vm && vm.$options.propsData &&
+      vm.$options.propsData[key] === undefined &&
+      vm._props[key] !== undefined
+    ) {
+      return vm._props[key]
+    }
+    // call factory function for non-Function types
+    // a value is Function if its prototype is function even across different execution context
+    return typeof def === 'function' && getType(prop.type) !== 'Function'
+      ? def.call(vm)
+      : def
+  }
+
+  /**
+   * Assert whether a prop is valid.
+   */
+  function assertProp (
+    prop,
+    name,
+    value,
+    vm,
+    absent
+  ) {
+    if (prop.required && absent) {
+      warn(
+        'Missing required prop: "' + name + '"',
+        vm
+      );
+      return
+    }
+    if (value == null && !prop.required) {
+      return
+    }
+    var type = prop.type;
+    var valid = !type || type === true;
+    var expectedTypes = [];
+    if (type) {
+      if (!Array.isArray(type)) {
+        type = [type];
+      }
+      for (var i = 0; i < type.length && !valid; i++) {
+        var assertedType = assertType(value, type[i], vm);
+        expectedTypes.push(assertedType.expectedType || '');
+        valid = assertedType.valid;
+      }
+    }
+
+    var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+    if (!valid && haveExpectedTypes) {
+      warn(
+        getInvalidTypeMessage(name, value, expectedTypes),
+        vm
+      );
+      return
+    }
+    var validator = prop.validator;
+    if (validator) {
+      if (!validator(value)) {
+        warn(
+          'Invalid prop: custom validator check failed for prop "' + name + '".',
+          vm
+        );
+      }
+    }
+  }
+
+  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+  function assertType (value, type, vm) {
+    var valid;
+    var expectedType = getType(type);
+    if (simpleCheckRE.test(expectedType)) {
+      var t = typeof value;
+      valid = t === expectedType.toLowerCase();
+      // for primitive wrapper objects
+      if (!valid && t === 'object') {
+        valid = value instanceof type;
+      }
+    } else if (expectedType === 'Object') {
+      valid = isPlainObject(value);
+    } else if (expectedType === 'Array') {
+      valid = Array.isArray(value);
+    } else {
+      try {
+        valid = value instanceof type;
+      } catch (e) {
+        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+        valid = false;
+      }
+    }
+    return {
+      valid: valid,
+      expectedType: expectedType
+    }
+  }
+
+  var functionTypeCheckRE = /^\s*function (\w+)/;
+
+  /**
+   * Use function string name to check built-in types,
+   * because a simple equality check will fail when running
+   * across different vms / iframes.
+   */
+  function getType (fn) {
+    var match = fn && fn.toString().match(functionTypeCheckRE);
+    return match ? match[1] : ''
+  }
+
+  function isSameType (a, b) {
+    return getType(a) === getType(b)
+  }
+
+  function getTypeIndex (type, expectedTypes) {
+    if (!Array.isArray(expectedTypes)) {
+      return isSameType(expectedTypes, type) ? 0 : -1
+    }
+    for (var i = 0, len = expectedTypes.length; i < len; i++) {
+      if (isSameType(expectedTypes[i], type)) {
+        return i
+      }
+    }
+    return -1
+  }
+
+  function getInvalidTypeMessage (name, value, expectedTypes) {
+    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', '));
+    var expectedType = expectedTypes[0];
+    var receivedType = toRawType(value);
+    // check if we need to specify expected value
+    if (
+      expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      isExplicable(typeof value) &&
+      !isBoolean(expectedType, receivedType)
+    ) {
+      message += " with value " + (styleValue(value, expectedType));
+    }
+    message += ", got " + receivedType + " ";
+    // check if we need to specify received value
+    if (isExplicable(receivedType)) {
+      message += "with value " + (styleValue(value, receivedType)) + ".";
+    }
+    return message
+  }
+
+  function styleValue (value, type) {
+    if (type === 'String') {
+      return ("\"" + value + "\"")
+    } else if (type === 'Number') {
+      return ("" + (Number(value)))
+    } else {
+      return ("" + value)
+    }
+  }
+
+  var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+  function isExplicable (value) {
+    return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+  }
+
+  function isBoolean () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+  }
+
+  /*  */
+
+  function handleError (err, vm, info) {
+    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+    // See: https://github.com/vuejs/vuex/issues/1505
+    pushTarget();
+    try {
+      if (vm) {
+        var cur = vm;
+        while ((cur = cur.$parent)) {
+          var hooks = cur.$options.errorCaptured;
+          if (hooks) {
+            for (var i = 0; i < hooks.length; i++) {
+              try {
+                var capture = hooks[i].call(cur, err, vm, info) === false;
+                if (capture) { return }
+              } catch (e) {
+                globalHandleError(e, cur, 'errorCaptured hook');
+              }
+            }
+          }
+        }
+      }
+      globalHandleError(err, vm, info);
+    } finally {
+      popTarget();
+    }
+  }
+
+  function invokeWithErrorHandling (
+    handler,
+    context,
+    args,
+    vm,
+    info
+  ) {
+    var res;
+    try {
+      res = args ? handler.apply(context, args) : handler.call(context);
+      if (res && !res._isVue && isPromise(res) && !res._handled) {
+        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+        // issue #9511
+        // avoid catch triggering multiple times when nested calls
+        res._handled = true;
+      }
+    } catch (e) {
+      handleError(e, vm, info);
+    }
+    return res
+  }
+
+  function globalHandleError (err, vm, info) {
+    if (config.errorHandler) {
+      try {
+        return config.errorHandler.call(null, err, vm, info)
+      } catch (e) {
+        // if the user intentionally throws the original error in the handler,
+        // do not log it twice
+        if (e !== err) {
+          logError(e, null, 'config.errorHandler');
+        }
+      }
+    }
+    logError(err, vm, info);
+  }
+
+  function logError (err, vm, info) {
+    {
+      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+    }
+    /* istanbul ignore else */
+    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+      console.error(err);
+    } else {
+      throw err
+    }
+  }
+
+  /*  */
+
+  var isUsingMicroTask = false;
+
+  var callbacks = [];
+  var pending = false;
+
+  function flushCallbacks () {
+    pending = false;
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
+    }
+  }
+
+  // Here we have async deferring wrappers using microtasks.
+  // In 2.5 we used (macro) tasks (in combination with microtasks).
+  // However, it has subtle problems when state is changed right before repaint
+  // (e.g. #6813, out-in transitions).
+  // Also, using (macro) tasks in event handler would cause some weird behaviors
+  // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+  // So we now use microtasks everywhere, again.
+  // A major drawback of this tradeoff is that there are some scenarios
+  // where microtasks have too high a priority and fire in between supposedly
+  // sequential events (e.g. #4521, #6690, which have workarounds)
+  // or even between bubbling of the same event (#6566).
+  var timerFunc;
+
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) {
+    var p = Promise.resolve();
+    timerFunc = function () {
+      p.then(flushCallbacks);
+      // In problematic UIWebViews, Promise.then doesn't completely break, but
+      // it can get stuck in a weird state where callbacks are pushed into the
+      // microtask queue but the queue isn't being flushed, until the browser
+      // needs to do some other work, e.g. handle a timer. Therefore we can
+      // "force" the microtask queue to be flushed by adding an empty timer.
+      if (isIOS) { setTimeout(noop); }
+    };
+    isUsingMicroTask = true;
+  } else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+    timerFunc = function () {
+      counter = (counter + 1) % 2;
+      textNode.data = String(counter);
+    };
+    isUsingMicroTask = true;
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+    // Fallback to setImmediate.
+    // Technically it leverages the (macro) task queue,
+    // but it is still a better choice than setTimeout.
+    timerFunc = function () {
+      setImmediate(flushCallbacks);
+    };
+  } else {
+    // Fallback to setTimeout.
+    timerFunc = function () {
+      setTimeout(flushCallbacks, 0);
+    };
+  }
+
+  function nextTick (cb, ctx) {
+    var _resolve;
+    callbacks.push(function () {
+      if (cb) {
+        try {
+          cb.call(ctx);
+        } catch (e) {
+          handleError(e, ctx, 'nextTick');
+        }
+      } else if (_resolve) {
+        _resolve(ctx);
+      }
+    });
+    if (!pending) {
+      pending = true;
+      timerFunc();
+    }
+    // $flow-disable-line
+    if (!cb && typeof Promise !== 'undefined') {
+      return new Promise(function (resolve) {
+        _resolve = resolve;
+      })
+    }
+  }
+
+  /*  */
+
+  /* not type checking this file because flow doesn't play well with Proxy */
+
+  var initProxy;
+
+  {
+    var allowedGlobals = makeMap(
+      'Infinity,undefined,NaN,isFinite,isNaN,' +
+      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+      'require' // for Webpack/Browserify
+    );
+
+    var warnNonPresent = function (target, key) {
+      warn(
+        "Property or method \"" + key + "\" is not defined on the instance but " +
+        'referenced during render. Make sure that this property is reactive, ' +
+        'either in the data option, or for class-based components, by ' +
+        'initializing the property. ' +
+        'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+        target
+      );
+    };
+
+    var warnReservedPrefix = function (target, key) {
+      warn(
+        "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+        'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+        'prevent conflicts with Vue internals. ' +
+        'See: https://vuejs.org/v2/api/#data',
+        target
+      );
+    };
+
+    var hasProxy =
+      typeof Proxy !== 'undefined' && isNative(Proxy);
+
+    if (hasProxy) {
+      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+      config.keyCodes = new Proxy(config.keyCodes, {
+        set: function set (target, key, value) {
+          if (isBuiltInModifier(key)) {
+            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+            return false
+          } else {
+            target[key] = value;
+            return true
+          }
+        }
+      });
+    }
+
+    var hasHandler = {
+      has: function has (target, key) {
+        var has = key in target;
+        var isAllowed = allowedGlobals(key) ||
+          (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
+        if (!has && !isAllowed) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return has || !isAllowed
+      }
+    };
+
+    var getHandler = {
+      get: function get (target, key) {
+        if (typeof key === 'string' && !(key in target)) {
+          if (key in target.$data) { warnReservedPrefix(target, key); }
+          else { warnNonPresent(target, key); }
+        }
+        return target[key]
+      }
+    };
+
+    initProxy = function initProxy (vm) {
+      if (hasProxy) {
+        // determine which proxy handler to use
+        var options = vm.$options;
+        var handlers = options.render && options.render._withStripped
+          ? getHandler
+          : hasHandler;
+        vm._renderProxy = new Proxy(vm, handlers);
+      } else {
+        vm._renderProxy = vm;
+      }
+    };
+  }
 
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
+  /*  */
+
+  var seenObjects = new _Set();
+
+  /**
+   * Recursively traverse an object to evoke all converted
+   * getters, so that every nested property inside the object
+   * is collected as a "deep" dependency.
+   */
+  function traverse (val) {
+    _traverse(val, seenObjects);
+    seenObjects.clear();
+  }
+
+  function _traverse (val, seen) {
+    var i, keys;
+    var isA = Array.isArray(val);
+    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+      return
+    }
+    if (val.__ob__) {
+      var depId = val.__ob__.dep.id;
+      if (seen.has(depId)) {
+        return
+      }
+      seen.add(depId);
+    }
+    if (isA) {
+      i = val.length;
+      while (i--) { _traverse(val[i], seen); }
+    } else {
+      keys = Object.keys(val);
+      i = keys.length;
+      while (i--) { _traverse(val[keys[i]], seen); }
+    }
   }
-  if (asRootData && ob) {
-    ob.vmCount++;
+
+  var mark;
+  var measure;
+
+  {
+    var perf = inBrowser && window.performance;
+    /* istanbul ignore if */
+    if (
+      perf &&
+      perf.mark &&
+      perf.measure &&
+      perf.clearMarks &&
+      perf.clearMeasures
+    ) {
+      mark = function (tag) { return perf.mark(tag); };
+      measure = function (name, startTag, endTag) {
+        perf.measure(name, startTag, endTag);
+        perf.clearMarks(startTag);
+        perf.clearMarks(endTag);
+        // perf.clearMeasures(name)
+      };
+    }
   }
-  return ob
-}
 
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
-          }
+  /*  */
+
+  var normalizeEvent = cached(function (name) {
+    var passive = name.charAt(0) === '&';
+    name = passive ? name.slice(1) : name;
+    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+    name = once$$1 ? name.slice(1) : name;
+    var capture = name.charAt(0) === '!';
+    name = capture ? name.slice(1) : name;
+    return {
+      name: name,
+      once: once$$1,
+      capture: capture,
+      passive: passive
+    }
+  });
+
+  function createFnInvoker (fns, vm) {
+    function invoker () {
+      var arguments$1 = arguments;
+
+      var fns = invoker.fns;
+      if (Array.isArray(fns)) {
+        var cloned = fns.slice();
+        for (var i = 0; i < cloned.length; i++) {
+          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
         }
+      } else {
+        // return handler return value for single handlers
+        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
       }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
+    }
+    invoker.fns = fns;
+    return invoker
+  }
+
+  function updateListeners (
+    on,
+    oldOn,
+    add,
+    remove$$1,
+    createOnceHandler,
+    vm
+  ) {
+    var name, def$$1, cur, old, event;
+    for (name in on) {
+      def$$1 = cur = on[name];
+      old = oldOn[name];
+      event = normalizeEvent(name);
+      if (isUndef(cur)) {
+        warn(
+          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+          vm
+        );
+      } else if (isUndef(old)) {
+        if (isUndef(cur.fns)) {
+          cur = on[name] = createFnInvoker(cur, vm);
+        }
+        if (isTrue(event.once)) {
+          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+        }
+        add(event.name, cur, event.capture, event.passive, event.params);
+      } else if (cur !== old) {
+        old.fns = cur;
+        on[name] = old;
       }
-      /* eslint-enable no-self-compare */
-      if ("development" !== 'production' && customSetter) {
-        customSetter();
+    }
+    for (name in oldOn) {
+      if (isUndef(on[name])) {
+        event = normalizeEvent(name);
+        remove$$1(event.name, oldOn[name], event.capture);
       }
-      if (setter) {
-        setter.call(obj, newVal);
+    }
+  }
+
+  /*  */
+
+  function mergeVNodeHook (def, hookKey, hook) {
+    if (def instanceof VNode) {
+      def = def.data.hook || (def.data.hook = {});
+    }
+    var invoker;
+    var oldHook = def[hookKey];
+
+    function wrappedHook () {
+      hook.apply(this, arguments);
+      // important: remove merged hook to ensure it's called only once
+      // and prevent memory leak
+      remove(invoker.fns, wrappedHook);
+    }
+
+    if (isUndef(oldHook)) {
+      // no existing hook
+      invoker = createFnInvoker([wrappedHook]);
+    } else {
+      /* istanbul ignore if */
+      if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
+        // already a merged invoker
+        invoker = oldHook;
+        invoker.fns.push(wrappedHook);
       } else {
-        val = newVal;
+        // existing plain hook
+        invoker = createFnInvoker([oldHook, wrappedHook]);
       }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
     }
-  });
-}
 
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
+    invoker.merged = true;
+    def[hookKey] = invoker;
   }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
+
+  /*  */
+
+  function extractPropsFromVNodeData (
+    data,
+    Ctor,
+    tag
+  ) {
+    // we are only extracting raw values here.
+    // validation and default values are handled in the child
+    // component itself.
+    var propOptions = Ctor.options.props;
+    if (isUndef(propOptions)) {
+      return
+    }
+    var res = {};
+    var attrs = data.attrs;
+    var props = data.props;
+    if (isDef(attrs) || isDef(props)) {
+      for (var key in propOptions) {
+        var altKey = hyphenate(key);
+        {
+          var keyInLowerCase = key.toLowerCase();
+          if (
+            key !== keyInLowerCase &&
+            attrs && hasOwn(attrs, keyInLowerCase)
+          ) {
+            tip(
+              "Prop \"" + keyInLowerCase + "\" is passed to component " +
+              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+              " \"" + key + "\". " +
+              "Note that HTML attributes are case-insensitive and camelCased " +
+              "props need to use their kebab-case equivalents when using in-DOM " +
+              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+            );
+          }
+        }
+        checkProp(res, props, key, altKey, true) ||
+        checkProp(res, attrs, key, altKey, false);
+      }
+    }
+    return res
   }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
+
+  function checkProp (
+    res,
+    hash,
+    key,
+    altKey,
+    preserve
+  ) {
+    if (isDef(hash)) {
+      if (hasOwn(hash, key)) {
+        res[key] = hash[key];
+        if (!preserve) {
+          delete hash[key];
+        }
+        return true
+      } else if (hasOwn(hash, altKey)) {
+        res[key] = hash[altKey];
+        if (!preserve) {
+          delete hash[altKey];
+        }
+        return true
+      }
+    }
+    return false
   }
-  if (!ob) {
-    target[key] = val;
-    return val
+
+  /*  */
+
+  // The template compiler attempts to minimize the need for normalization by
+  // statically analyzing the template at compile time.
+  //
+  // For plain HTML markup, normalization can be completely skipped because the
+  // generated render function is guaranteed to return Array<VNode>. There are
+  // two cases where extra normalization is needed:
+
+  // 1. When the children contains components - because a functional component
+  // may return an Array instead of a single root. In this case, just a simple
+  // normalization is needed - if any child is an Array, we flatten the whole
+  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+  // because functional components already normalize their own children.
+  function simpleNormalizeChildren (children) {
+    for (var i = 0; i < children.length; i++) {
+      if (Array.isArray(children[i])) {
+        return Array.prototype.concat.apply([], children)
+      }
+    }
+    return children
   }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
 
-/**
- * Delete a property and trigger change if necessary.
- */
-function del (target, key) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.splice(key, 1);
-    return
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid deleting properties on a Vue instance or its root $data ' +
-      '- just set it to null.'
-    );
-    return
+  // 2. When the children contains constructs that always generated nested Arrays,
+  // e.g. <template>, <slot>, v-for, or when the children is provided by user
+  // with hand-written render functions / JSX. In such cases a full normalization
+  // is needed to cater to all possible types of children values.
+  function normalizeChildren (children) {
+    return isPrimitive(children)
+      ? [createTextVNode(children)]
+      : Array.isArray(children)
+        ? normalizeArrayChildren(children)
+        : undefined
   }
-  if (!hasOwn(target, key)) {
-    return
+
+  function isTextNode (node) {
+    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
   }
-  delete target[key];
-  if (!ob) {
-    return
+
+  function normalizeArrayChildren (children, nestedIndex) {
+    var res = [];
+    var i, c, lastIndex, last;
+    for (i = 0; i < children.length; i++) {
+      c = children[i];
+      if (isUndef(c) || typeof c === 'boolean') { continue }
+      lastIndex = res.length - 1;
+      last = res[lastIndex];
+      //  nested
+      if (Array.isArray(c)) {
+        if (c.length > 0) {
+          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+          // merge adjacent text nodes
+          if (isTextNode(c[0]) && isTextNode(last)) {
+            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+            c.shift();
+          }
+          res.push.apply(res, c);
+        }
+      } else if (isPrimitive(c)) {
+        if (isTextNode(last)) {
+          // merge adjacent text nodes
+          // this is necessary for SSR hydration because text nodes are
+          // essentially merged when rendered to HTML strings
+          res[lastIndex] = createTextVNode(last.text + c);
+        } else if (c !== '') {
+          // convert primitive to vnode
+          res.push(createTextVNode(c));
+        }
+      } else {
+        if (isTextNode(c) && isTextNode(last)) {
+          // merge adjacent text nodes
+          res[lastIndex] = createTextVNode(last.text + c.text);
+        } else {
+          // default key for nested array children (likely generated by v-for)
+          if (isTrue(children._isVList) &&
+            isDef(c.tag) &&
+            isUndef(c.key) &&
+            isDef(nestedIndex)) {
+            c.key = "__vlist" + nestedIndex + "_" + i + "__";
+          }
+          res.push(c);
+        }
+      }
+    }
+    return res
   }
-  ob.dep.notify();
-}
 
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
+  /*  */
+
+  function initProvide (vm) {
+    var provide = vm.$options.provide;
+    if (provide) {
+      vm._provided = typeof provide === 'function'
+        ? provide.call(vm)
+        : provide;
+    }
+  }
+
+  function initInjections (vm) {
+    var result = resolveInject(vm.$options.inject, vm);
+    if (result) {
+      toggleObserving(false);
+      Object.keys(result).forEach(function (key) {
+        /* istanbul ignore else */
+        {
+          defineReactive$$1(vm, key, result[key], function () {
+            warn(
+              "Avoid mutating an injected value directly since the changes will be " +
+              "overwritten whenever the provided component re-renders. " +
+              "injection being mutated: \"" + key + "\"",
+              vm
+            );
+          });
+        }
+      });
+      toggleObserving(true);
+    }
+  }
+
+  function resolveInject (inject, vm) {
+    if (inject) {
+      // inject is :any because flow is not smart enough to figure out cached
+      var result = Object.create(null);
+      var keys = hasSymbol
+        ? Reflect.ownKeys(inject)
+        : Object.keys(inject);
+
+      for (var i = 0; i < keys.length; i++) {
+        var key = keys[i];
+        // #6574 in case the inject object is observed...
+        if (key === '__ob__') { continue }
+        var provideKey = inject[key].from;
+        var source = vm;
+        while (source) {
+          if (source._provided && hasOwn(source._provided, provideKey)) {
+            result[key] = source._provided[provideKey];
+            break
+          }
+          source = source.$parent;
+        }
+        if (!source) {
+          if ('default' in inject[key]) {
+            var provideDefault = inject[key].default;
+            result[key] = typeof provideDefault === 'function'
+              ? provideDefault.call(vm)
+              : provideDefault;
+          } else {
+            warn(("Injection \"" + key + "\" not found"), vm);
+          }
+        }
+      }
+      return result
     }
   }
-}
 
-/*  */
+  /*  */
 
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
 
-/**
- * Options with restrictions
- */
-{
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
-      warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
-      );
+
+  /**
+   * Runtime helper for resolving raw children VNodes into a slot object.
+   */
+  function resolveSlots (
+    children,
+    context
+  ) {
+    if (!children || !children.length) {
+      return {}
+    }
+    var slots = {};
+    for (var i = 0, l = children.length; i < l; i++) {
+      var child = children[i];
+      var data = child.data;
+      // remove slot attribute if the node is resolved as a Vue slot node
+      if (data && data.attrs && data.attrs.slot) {
+        delete data.attrs.slot;
+      }
+      // named slots should only be respected if the vnode was rendered in the
+      // same context.
+      if ((child.context === context || child.fnContext === context) &&
+        data && data.slot != null
+      ) {
+        var name = data.slot;
+        var slot = (slots[name] || (slots[name] = []));
+        if (child.tag === 'template') {
+          slot.push.apply(slot, child.children || []);
+        } else {
+          slot.push(child);
+        }
+      } else {
+        (slots.default || (slots.default = [])).push(child);
+      }
     }
-    return defaultStrat(parent, child)
-  };
-}
+    // ignore slots that contains only whitespace
+    for (var name$1 in slots) {
+      if (slots[name$1].every(isWhitespace)) {
+        delete slots[name$1];
+      }
+    }
+    return slots
+  }
 
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
+  function isWhitespace (node) {
+    return (node.isComment && !node.asyncFactory) || node.text === ' '
+  }
+
+  /*  */
+
+  function isAsyncPlaceholder (node) {
+    return node.isComment && node.asyncFactory
+  }
+
+  /*  */
+
+  function normalizeScopedSlots (
+    slots,
+    normalSlots,
+    prevSlots
+  ) {
+    var res;
+    var hasNormalSlots = Object.keys(normalSlots).length > 0;
+    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+    var key = slots && slots.$key;
+    if (!slots) {
+      res = {};
+    } else if (slots._normalized) {
+      // fast path 1: child component re-render only, parent did not change
+      return slots._normalized
+    } else if (
+      isStable &&
+      prevSlots &&
+      prevSlots !== emptyObject &&
+      key === prevSlots.$key &&
+      !hasNormalSlots &&
+      !prevSlots.$hasNormal
+    ) {
+      // fast path 2: stable scoped slots w/ no normal slots to proxy,
+      // only need to normalize once
+      return prevSlots
+    } else {
+      res = {};
+      for (var key$1 in slots) {
+        if (slots[key$1] && key$1[0] !== '$') {
+          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+        }
+      }
     }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
+    // expose normal slots on scopedSlots
+    for (var key$2 in normalSlots) {
+      if (!(key$2 in res)) {
+        res[key$2] = proxyNormalSlot(normalSlots, key$2);
+      }
+    }
+    // avoriaz seems to mock a non-extensible $scopedSlots object
+    // and when that is passed down this would cause an error
+    if (slots && Object.isExtensible(slots)) {
+      (slots)._normalized = res;
+    }
+    def(res, '$stable', isStable);
+    def(res, '$key', key);
+    def(res, '$hasNormal', hasNormalSlots);
+    return res
+  }
+
+  function normalizeScopedSlot(normalSlots, key, fn) {
+    var normalized = function () {
+      var res = arguments.length ? fn.apply(null, arguments) : fn({});
+      res = res && typeof res === 'object' && !Array.isArray(res)
+        ? [res] // single vnode
+        : normalizeChildren(res);
+      var vnode = res && res[0];
+      return res && (
+        !vnode ||
+        (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+      ) ? undefined
+        : res
+    };
+    // this is a slot using the new v-slot syntax without scope. although it is
+    // compiled as a scoped slot, render fn users would expect it to be present
+    // on this.$slots because the usage is semantically a normal slot.
+    if (fn.proxy) {
+      Object.defineProperty(normalSlots, key, {
+        get: normalized,
+        enumerable: true,
+        configurable: true
+      });
+    }
+    return normalized
+  }
+
+  function proxyNormalSlot(slots, key) {
+    return function () { return slots[key]; }
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering v-for lists.
+   */
+  function renderList (
+    val,
+    render
+  ) {
+    var ret, i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      ret = new Array(val.length);
+      for (i = 0, l = val.length; i < l; i++) {
+        ret[i] = render(val[i], i);
+      }
+    } else if (typeof val === 'number') {
+      ret = new Array(val);
+      for (i = 0; i < val; i++) {
+        ret[i] = render(i + 1, i);
+      }
+    } else if (isObject(val)) {
+      if (hasSymbol && val[Symbol.iterator]) {
+        ret = [];
+        var iterator = val[Symbol.iterator]();
+        var result = iterator.next();
+        while (!result.done) {
+          ret.push(render(result.value, ret.length));
+          result = iterator.next();
+        }
       } else {
-        return defaultData
+        keys = Object.keys(val);
+        ret = new Array(keys.length);
+        for (i = 0, l = keys.length; i < l; i++) {
+          key = keys[i];
+          ret[i] = render(val[key], key, i);
+        }
       }
     }
+    if (!isDef(ret)) {
+      ret = [];
+    }
+    (ret)._isVList = true;
+    return ret
   }
-}
 
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      "development" !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
+  /*  */
+
+  /**
+   * Runtime helper for rendering <slot>
+   */
+  function renderSlot (
+    name,
+    fallbackRender,
+    props,
+    bindObject
+  ) {
+    var scopedSlotFn = this.$scopedSlots[name];
+    var nodes;
+    if (scopedSlotFn) {
+      // scoped slot
+      props = props || {};
+      if (bindObject) {
+        if (!isObject(bindObject)) {
+          warn('slot v-bind without argument expects an Object', this);
+        }
+        props = extend(extend({}, bindObject), props);
+      }
+      nodes =
+        scopedSlotFn(props) ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    } else {
+      nodes =
+        this.$slots[name] ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    }
 
-      return parentVal
+    var target = props && props.slot;
+    if (target) {
+      return this.$createElement('template', { slot: target }, nodes)
+    } else {
+      return nodes
     }
-    return mergeDataOrFn(parentVal, childVal)
   }
 
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
+  /*  */
 
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    "development" !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
+  /**
+   * Runtime helper for resolving filters
+   */
+  function resolveFilter (id) {
+    return resolveAsset(this.$options, 'filters', id, true) || identity
   }
-}
 
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
+  /*  */
 
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
-  {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && "development" !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (var key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-    warn(
-      'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
-    );
+  function isKeyNotMatch (expect, actual) {
+    if (Array.isArray(expect)) {
+      return expect.indexOf(actual) === -1
+    } else {
+      return expect !== actual
+    }
   }
-  if (isBuiltInTag(name) || config.isReservedTag(name)) {
-    warn(
-      'Do not use built-in or reserved HTML elements as component ' +
-      'id: ' + name
-    );
+
+  /**
+   * Runtime helper for checking keyCodes from config.
+   * exposed as Vue.prototype._k
+   * passing in eventKeyName as last argument separately for backwards compat
+   */
+  function checkKeyCodes (
+    eventKeyCode,
+    key,
+    builtInKeyCode,
+    eventKeyName,
+    builtInKeyName
+  ) {
+    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+      return isKeyNotMatch(builtInKeyName, eventKeyName)
+    } else if (mappedKeyCode) {
+      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+    } else if (eventKeyName) {
+      return hyphenate(eventKeyName) !== key
+    }
+    return eventKeyCode === undefined
   }
-}
 
-/**
- * Ensure all props option syntax are normalized into the
- * Object-based format.
- */
-function normalizeProps (options, vm) {
-  var props = options.props;
-  if (!props) { return }
-  var res = {};
-  var i, val, name;
-  if (Array.isArray(props)) {
-    i = props.length;
-    while (i--) {
-      val = props[i];
-      if (typeof val === 'string') {
-        name = camelize(val);
-        res[name] = { type: null };
+  /*  */
+
+  /**
+   * Runtime helper for merging v-bind="object" into a VNode's data.
+   */
+  function bindObjectProps (
+    data,
+    tag,
+    value,
+    asProp,
+    isSync
+  ) {
+    if (value) {
+      if (!isObject(value)) {
+        warn(
+          'v-bind without argument expects an Object or Array value',
+          this
+        );
       } else {
-        warn('props must be strings when using array syntax.');
+        if (Array.isArray(value)) {
+          value = toObject(value);
+        }
+        var hash;
+        var loop = function ( key ) {
+          if (
+            key === 'class' ||
+            key === 'style' ||
+            isReservedAttribute(key)
+          ) {
+            hash = data;
+          } else {
+            var type = data.attrs && data.attrs.type;
+            hash = asProp || config.mustUseProp(tag, type, key)
+              ? data.domProps || (data.domProps = {})
+              : data.attrs || (data.attrs = {});
+          }
+          var camelizedKey = camelize(key);
+          var hyphenatedKey = hyphenate(key);
+          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+            hash[key] = value[key];
+
+            if (isSync) {
+              var on = data.on || (data.on = {});
+              on[("update:" + key)] = function ($event) {
+                value[key] = $event;
+              };
+            }
+          }
+        };
+
+        for (var key in value) loop( key );
       }
     }
-  } else if (isPlainObject(props)) {
-    for (var key in props) {
-      val = props[key];
-      name = camelize(key);
-      res[name] = isPlainObject(val)
-        ? val
-        : { type: val };
-    }
-  } else {
-    warn(
-      "Invalid value for option \"props\": expected an Array or an Object, " +
-      "but got " + (toRawType(props)) + ".",
-      vm
+    return data
+  }
+
+  /*  */
+
+  /**
+   * Runtime helper for rendering static trees.
+   */
+  function renderStatic (
+    index,
+    isInFor
+  ) {
+    var cached = this._staticTrees || (this._staticTrees = []);
+    var tree = cached[index];
+    // if has already-rendered static tree and not inside v-for,
+    // we can reuse the same tree.
+    if (tree && !isInFor) {
+      return tree
+    }
+    // otherwise, render a fresh tree.
+    tree = cached[index] = this.$options.staticRenderFns[index].call(
+      this._renderProxy,
+      null,
+      this // for render fns generated for functional component templates
     );
+    markStatic(tree, ("__static__" + index), false);
+    return tree
   }
-  options.props = res;
-}
 
-/**
- * Normalize all injections into Object-based format
- */
-function normalizeInject (options, vm) {
-  var inject = options.inject;
-  if (!inject) { return }
-  var normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (var i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (var key in inject) {
-      var val = inject[key];
-      normalized[key] = isPlainObject(val)
-        ? extend({ from: key }, val)
-        : { from: val };
+  /**
+   * Runtime helper for v-once.
+   * Effectively it means marking the node as static with a unique key.
+   */
+  function markOnce (
+    tree,
+    index,
+    key
+  ) {
+    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+    return tree
+  }
+
+  function markStatic (
+    tree,
+    key,
+    isOnce
+  ) {
+    if (Array.isArray(tree)) {
+      for (var i = 0; i < tree.length; i++) {
+        if (tree[i] && typeof tree[i] !== 'string') {
+          markStaticNode(tree[i], (key + "_" + i), isOnce);
+        }
+      }
+    } else {
+      markStaticNode(tree, key, isOnce);
     }
-  } else {
-    warn(
-      "Invalid value for option \"inject\": expected an Array or an Object, " +
-      "but got " + (toRawType(inject)) + ".",
-      vm
-    );
   }
-}
 
-/**
- * Normalize raw function directives into object format.
- */
-function normalizeDirectives (options) {
-  var dirs = options.directives;
-  if (dirs) {
-    for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+  function markStaticNode (node, key, isOnce) {
+    node.isStatic = true;
+    node.key = key;
+    node.isOnce = isOnce;
+  }
+
+  /*  */
+
+  function bindObjectListeners (data, value) {
+    if (value) {
+      if (!isPlainObject(value)) {
+        warn(
+          'v-on without argument expects an Object value',
+          this
+        );
+      } else {
+        var on = data.on = data.on ? extend({}, data.on) : {};
+        for (var key in value) {
+          var existing = on[key];
+          var ours = value[key];
+          on[key] = existing ? [].concat(existing, ours) : ours;
+        }
       }
     }
+    return data
   }
-}
 
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
-  }
-}
+  /*  */
 
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-function mergeOptions (
-  parent,
-  child,
-  vm
-) {
-  {
-    checkComponents(child);
+  function resolveScopedSlots (
+    fns, // see flow/vnode
+    res,
+    // the following are added in 2.6
+    hasDynamicKeys,
+    contentHashKey
+  ) {
+    res = res || { $stable: !hasDynamicKeys };
+    for (var i = 0; i < fns.length; i++) {
+      var slot = fns[i];
+      if (Array.isArray(slot)) {
+        resolveScopedSlots(slot, res, hasDynamicKeys);
+      } else if (slot) {
+        // marker for reverse proxying v-slot without scope on this.$slots
+        if (slot.proxy) {
+          slot.fn.proxy = true;
+        }
+        res[slot.key] = slot.fn;
+      }
+    }
+    if (contentHashKey) {
+      (res).$key = contentHashKey;
+    }
+    return res
   }
 
-  if (typeof child === 'function') {
-    child = child.options;
-  }
+  /*  */
 
-  normalizeProps(child, vm);
-  normalizeInject(child, vm);
-  normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
-    }
-  }
-  var options = {};
-  var key;
-  for (key in parent) {
-    mergeField(key);
-  }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
+  function bindDynamicKeys (baseObj, values) {
+    for (var i = 0; i < values.length; i += 2) {
+      var key = values[i];
+      if (typeof key === 'string' && key) {
+        baseObj[values[i]] = values[i + 1];
+      } else if (key !== '' && key !== null) {
+        // null is a special value for explicitly removing a binding
+        warn(
+          ("Invalid value for dynamic directive argument (expected string or null): " + key),
+          this
+        );
+      }
     }
+    return baseObj
   }
-  function mergeField (key) {
-    var strat = strats[key] || defaultStrat;
-    options[key] = strat(parent[key], child[key], vm, key);
-  }
-  return options
-}
 
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-function resolveAsset (
-  options,
-  type,
-  id,
-  warnMissing
-) {
-  /* istanbul ignore if */
-  if (typeof id !== 'string') {
-    return
-  }
-  var assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) { return assets[id] }
-  var camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-  var PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-  // fallback to prototype chain
-  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if ("development" !== 'production' && warnMissing && !res) {
-    warn(
-      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-      options
-    );
-  }
-  return res
-}
-
-/*  */
-
-function validateProp (
-  key,
-  propOptions,
-  propsData,
-  vm
-) {
-  var prop = propOptions[key];
-  var absent = !hasOwn(propsData, key);
-  var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
-    if (absent && !hasOwn(prop, 'default')) {
-      value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
-    }
-  }
-  // check default value
-  if (value === undefined) {
-    value = getPropDefaultValue(vm, prop, key);
-    // since the default value is a fresh copy,
-    // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
-    observe(value);
-    observerState.shouldConvert = prevShouldConvert;
-  }
-  {
-    assertProp(prop, key, value, vm, absent);
+  // helper to dynamically append modifier runtime markers to event names.
+  // ensure only append when value is already string, otherwise it will be cast
+  // to string and cause the type check to miss.
+  function prependModifier (value, symbol) {
+    return typeof value === 'string' ? symbol + value : value
   }
-  return value
-}
 
-/**
- * Get the default value of a prop.
- */
-function getPropDefaultValue (vm, prop, key) {
-  // no default, return undefined
-  if (!hasOwn(prop, 'default')) {
-    return undefined
-  }
-  var def = prop.default;
-  // warn against non-factory defaults for Object & Array
-  if ("development" !== 'production' && isObject(def)) {
-    warn(
-      'Invalid default value for prop "' + key + '": ' +
-      'Props with type Object/Array must use a factory function ' +
-      'to return the default value.',
-      vm
-    );
-  }
-  // the raw prop value was also undefined from previous render,
-  // return previous default value to avoid unnecessary watcher trigger
-  if (vm && vm.$options.propsData &&
-    vm.$options.propsData[key] === undefined &&
-    vm._props[key] !== undefined
-  ) {
-    return vm._props[key]
-  }
-  // call factory function for non-Function types
-  // a value is Function if its prototype is function even across different execution context
-  return typeof def === 'function' && getType(prop.type) !== 'Function'
-    ? def.call(vm)
-    : def
-}
+  /*  */
 
-/**
- * Assert whether a prop is valid.
- */
-function assertProp (
-  prop,
-  name,
-  value,
-  vm,
-  absent
-) {
-  if (prop.required && absent) {
-    warn(
-      'Missing required prop: "' + name + '"',
-      vm
-    );
-    return
-  }
-  if (value == null && !prop.required) {
-    return
-  }
-  var type = prop.type;
-  var valid = !type || type === true;
-  var expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
-    }
-    for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
-    }
-  }
-  if (!valid) {
-    warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
-      vm
-    );
-    return
-  }
-  var validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
-    }
+  function installRenderHelpers (target) {
+    target._o = markOnce;
+    target._n = toNumber;
+    target._s = toString;
+    target._l = renderList;
+    target._t = renderSlot;
+    target._q = looseEqual;
+    target._i = looseIndexOf;
+    target._m = renderStatic;
+    target._f = resolveFilter;
+    target._k = checkKeyCodes;
+    target._b = bindObjectProps;
+    target._v = createTextVNode;
+    target._e = createEmptyVNode;
+    target._u = resolveScopedSlots;
+    target._g = bindObjectListeners;
+    target._d = bindDynamicKeys;
+    target._p = prependModifier;
   }
-}
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+  /*  */
 
-function assertType (value, type) {
-  var valid;
-  var expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    var t = typeof value;
-    valid = t === expectedType.toLowerCase();
-    // for primitive wrapper objects
-    if (!valid && t === 'object') {
-      valid = value instanceof type;
-    }
-  } else if (expectedType === 'Object') {
-    valid = isPlainObject(value);
-  } else if (expectedType === 'Array') {
-    valid = Array.isArray(value);
-  } else {
-    valid = value instanceof type;
-  }
-  return {
-    valid: valid,
-    expectedType: expectedType
-  }
-}
+  function FunctionalRenderContext (
+    data,
+    props,
+    children,
+    parent,
+    Ctor
+  ) {
+    var this$1 = this;
 
-/**
- * Use function string name to check built-in types,
- * because a simple equality check will fail when running
- * across different vms / iframes.
- */
-function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
-  return match ? match[1] : ''
-}
+    var options = Ctor.options;
+    // ensure the createElement function in functional components
+    // gets a unique context - this is necessary for correct named slot check
+    var contextVm;
+    if (hasOwn(parent, '_uid')) {
+      contextVm = Object.create(parent);
+      // $flow-disable-line
+      contextVm._original = parent;
+    } else {
+      // the context vm passed in is a functional context as well.
+      // in this case we want to make sure we are able to get a hold to the
+      // real context instance.
+      contextVm = parent;
+      // $flow-disable-line
+      parent = parent._original;
+    }
+    var isCompiled = isTrue(options._compiled);
+    var needNormalization = !isCompiled;
+
+    this.data = data;
+    this.props = props;
+    this.children = children;
+    this.parent = parent;
+    this.listeners = data.on || emptyObject;
+    this.injections = resolveInject(options.inject, parent);
+    this.slots = function () {
+      if (!this$1.$slots) {
+        normalizeScopedSlots(
+          data.scopedSlots,
+          this$1.$slots = resolveSlots(children, parent)
+        );
+      }
+      return this$1.$slots
+    };
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
-  }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+    Object.defineProperty(this, 'scopedSlots', ({
+      enumerable: true,
+      get: function get () {
+        return normalizeScopedSlots(data.scopedSlots, this.slots())
+      }
+    }));
+
+    // support for compiled functional template
+    if (isCompiled) {
+      // exposing $options for renderStatic()
+      this.$options = options;
+      // pre-resolve slots for renderSlot()
+      this.$slots = this.slots();
+      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
     }
-  }
-  /* istanbul ignore next */
-  return false
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
+
+    if (options._scopeId) {
+      this._c = function (a, b, c, d) {
+        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+        if (vnode && !Array.isArray(vnode)) {
+          vnode.fnScopeId = options._scopeId;
+          vnode.fnContext = parent;
         }
-      }
+        return vnode
+      };
+    } else {
+      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
     }
   }
-  globalHandleError(err, vm, info);
-}
 
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
+  installRenderHelpers(FunctionalRenderContext.prototype);
+
+  function createFunctionalComponent (
+    Ctor,
+    propsData,
+    data,
+    contextVm,
+    children
+  ) {
+    var options = Ctor.options;
+    var props = {};
+    var propOptions = options.props;
+    if (isDef(propOptions)) {
+      for (var key in propOptions) {
+        props[key] = validateProp(key, propOptions, propsData || emptyObject);
+      }
+    } else {
+      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+      if (isDef(data.props)) { mergeProps(props, data.props); }
     }
-  }
-  logError(err, vm, info);
-}
 
-function logError (err, vm, info) {
-  {
-    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
-  }
-  /* istanbul ignore else */
-  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
-    console.error(err);
-  } else {
-    throw err
-  }
-}
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-var pending = false;
-
-function flushCallbacks () {
-  pending = false;
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  var p = Promise.resolve();
-  microTimerFunc = function () {
-    p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
-    // it can get stuck in a weird state where callbacks are pushed into the
-    // microtask queue but the queue isn't being flushed, until the browser
-    // needs to do some other work, e.g. handle a timer. Therefore we can
-    // "force" the microtask queue to be flushed by adding an empty timer.
-    if (isIOS) { setTimeout(noop); }
-  };
-} else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-function withMacroTask (fn) {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true;
-    var res = fn.apply(null, arguments);
-    useMacroTask = false;
-    return res
-  })
-}
+    var renderContext = new FunctionalRenderContext(
+      data,
+      props,
+      children,
+      contextVm,
+      Ctor
+    );
 
-function nextTick (cb, ctx) {
-  var _resolve;
-  callbacks.push(function () {
-    if (cb) {
-      try {
-        cb.call(ctx);
-      } catch (e) {
-        handleError(e, ctx, 'nextTick');
+    var vnode = options.render.call(null, renderContext._c, renderContext);
+
+    if (vnode instanceof VNode) {
+      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+    } else if (Array.isArray(vnode)) {
+      var vnodes = normalizeChildren(vnode) || [];
+      var res = new Array(vnodes.length);
+      for (var i = 0; i < vnodes.length; i++) {
+        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
       }
-    } else if (_resolve) {
-      _resolve(ctx);
+      return res
     }
-  });
-  if (!pending) {
-    pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
+  }
+
+  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+    // #7817 clone node before setting fnContext, otherwise if the node is reused
+    // (e.g. it was from a cached normal slot) the fnContext causes named slots
+    // that should not be matched to match.
+    var clone = cloneVNode(vnode);
+    clone.fnContext = contextVm;
+    clone.fnOptions = options;
+    {
+      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+    }
+    if (data.slot) {
+      (clone.data || (clone.data = {})).slot = data.slot;
     }
+    return clone
   }
-  // $flow-disable-line
-  if (!cb && typeof Promise !== 'undefined') {
-    return new Promise(function (resolve) {
-      _resolve = resolve;
-    })
+
+  function mergeProps (to, from) {
+    for (var key in from) {
+      to[camelize(key)] = from[key];
+    }
   }
-}
 
-/*  */
+  /*  */
 
-/* not type checking this file because flow doesn't play well with Proxy */
+  /*  */
 
-var initProxy;
+  /*  */
 
-{
-  var allowedGlobals = makeMap(
-    'Infinity,undefined,NaN,isFinite,isNaN,' +
-    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-    'require' // for Webpack/Browserify
-  );
+  /*  */
 
-  var warnNonPresent = function (target, key) {
-    warn(
-      "Property or method \"" + key + "\" is not defined on the instance but " +
-      'referenced during render. Make sure that this property is reactive, ' +
-      'either in the data option, or for class-based components, by ' +
-      'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
-      target
-    );
-  };
+  // inline hooks to be invoked on component VNodes during patch
+  var componentVNodeHooks = {
+    init: function init (vnode, hydrating) {
+      if (
+        vnode.componentInstance &&
+        !vnode.componentInstance._isDestroyed &&
+        vnode.data.keepAlive
+      ) {
+        // kept-alive components, treat as a patch
+        var mountedNode = vnode; // work around flow
+        componentVNodeHooks.prepatch(mountedNode, mountedNode);
+      } else {
+        var child = vnode.componentInstance = createComponentInstanceForVnode(
+          vnode,
+          activeInstance
+        );
+        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+      }
+    },
 
-  var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    prepatch: function prepatch (oldVnode, vnode) {
+      var options = vnode.componentOptions;
+      var child = vnode.componentInstance = oldVnode.componentInstance;
+      updateChildComponent(
+        child,
+        options.propsData, // updated props
+        options.listeners, // updated listeners
+        vnode, // new parent vnode
+        options.children // new children
+      );
+    },
 
-  if (hasProxy) {
-    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      set: function set (target, key, value) {
-        if (isBuiltInModifier(key)) {
-          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-          return false
+    insert: function insert (vnode) {
+      var context = vnode.context;
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isMounted) {
+        componentInstance._isMounted = true;
+        callHook(componentInstance, 'mounted');
+      }
+      if (vnode.data.keepAlive) {
+        if (context._isMounted) {
+          // vue-router#1212
+          // During updates, a kept-alive component's child components may
+          // change, so directly walking the tree here may call activated hooks
+          // on incorrect children. Instead we push them into a queue which will
+          // be processed after the whole patch process ended.
+          queueActivatedComponent(componentInstance);
         } else {
-          target[key] = value;
-          return true
+          activateChildComponent(componentInstance, true /* direct */);
         }
       }
-    });
-  }
+    },
 
-  var hasHandler = {
-    has: function has (target, key) {
-      var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
-      if (!has && !isAllowed) {
-        warnNonPresent(target, key);
+    destroy: function destroy (vnode) {
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isDestroyed) {
+        if (!vnode.data.keepAlive) {
+          componentInstance.$destroy();
+        } else {
+          deactivateChildComponent(componentInstance, true /* direct */);
+        }
       }
-      return has || !isAllowed
     }
   };
 
-  var getHandler = {
-    get: function get (target, key) {
-      if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
+  var hooksToMerge = Object.keys(componentVNodeHooks);
+
+  function createComponent (
+    Ctor,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    if (isUndef(Ctor)) {
+      return
+    }
+
+    var baseCtor = context.$options._base;
+
+    // plain options object: turn it into a constructor
+    if (isObject(Ctor)) {
+      Ctor = baseCtor.extend(Ctor);
+    }
+
+    // if at this stage it's not a constructor or an async component factory,
+    // reject.
+    if (typeof Ctor !== 'function') {
+      {
+        warn(("Invalid Component definition: " + (String(Ctor))), context);
       }
-      return target[key]
+      return
     }
-  };
 
-  initProxy = function initProxy (vm) {
-    if (hasProxy) {
-      // determine which proxy handler to use
-      var options = vm.$options;
-      var handlers = options.render && options.render._withStripped
-        ? getHandler
-        : hasHandler;
-      vm._renderProxy = new Proxy(vm, handlers);
-    } else {
-      vm._renderProxy = vm;
+    // async component
+    var asyncFactory;
+    if (isUndef(Ctor.cid)) {
+      asyncFactory = Ctor;
+      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+      if (Ctor === undefined) {
+        // return a placeholder node for async component, which is rendered
+        // as a comment node but preserves all the raw information for the node.
+        // the information will be used for async server-rendering and hydration.
+        return createAsyncPlaceholder(
+          asyncFactory,
+          data,
+          context,
+          children,
+          tag
+        )
+      }
     }
-  };
-}
 
-/*  */
+    data = data || {};
 
-var seenObjects = new _Set();
+    // resolve constructor options in case global mixins are applied after
+    // component constructor creation
+    resolveConstructorOptions(Ctor);
 
-/**
- * Recursively traverse an object to evoke all converted
- * getters, so that every nested property inside the object
- * is collected as a "deep" dependency.
- */
-function traverse (val) {
-  _traverse(val, seenObjects);
-  seenObjects.clear();
-}
-
-function _traverse (val, seen) {
-  var i, keys;
-  var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
-    return
-  }
-  if (val.__ob__) {
-    var depId = val.__ob__.dep.id;
-    if (seen.has(depId)) {
-      return
+    // transform component v-model data into props & events
+    if (isDef(data.model)) {
+      transformModel(Ctor.options, data);
     }
-    seen.add(depId);
-  }
-  if (isA) {
-    i = val.length;
-    while (i--) { _traverse(val[i], seen); }
-  } else {
-    keys = Object.keys(val);
-    i = keys.length;
-    while (i--) { _traverse(val[keys[i]], seen); }
-  }
-}
 
-var mark;
-var measure;
+    // extract props
+    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
 
-{
-  var perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    mark = function (tag) { return perf.mark(tag); };
-    measure = function (name, startTag, endTag) {
-      perf.measure(name, startTag, endTag);
-      perf.clearMarks(startTag);
-      perf.clearMarks(endTag);
-      perf.clearMeasures(name);
-    };
-  }
-}
+    // functional component
+    if (isTrue(Ctor.options.functional)) {
+      return createFunctionalComponent(Ctor, propsData, data, context, children)
+    }
+
+    // extract listeners, since these needs to be treated as
+    // child component listeners instead of DOM listeners
+    var listeners = data.on;
+    // replace with listeners with .native modifier
+    // so it gets processed during parent component patch.
+    data.on = data.nativeOn;
+
+    if (isTrue(Ctor.options.abstract)) {
+      // abstract components do not keep anything
+      // other than props & listeners & slot
+
+      // work around flow
+      var slot = data.slot;
+      data = {};
+      if (slot) {
+        data.slot = slot;
+      }
+    }
 
-/*  */
+    // install component management hooks onto the placeholder node
+    installComponentHooks(data);
+
+    // return a placeholder vnode
+    var name = Ctor.options.name || tag;
+    var vnode = new VNode(
+      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+      data, undefined, undefined, undefined, context,
+      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+      asyncFactory
+    );
 
-var normalizeEvent = cached(function (name) {
-  var passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  var capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name: name,
-    once: once$$1,
-    capture: capture,
-    passive: passive
+    return vnode
   }
-});
 
-function createFnInvoker (fns) {
-  function invoker () {
-    var arguments$1 = arguments;
+  function createComponentInstanceForVnode (
+    // we know it's MountedComponentVNode but flow doesn't
+    vnode,
+    // activeInstance in lifecycle state
+    parent
+  ) {
+    var options = {
+      _isComponent: true,
+      _parentVnode: vnode,
+      parent: parent
+    };
+    // check inline-template render functions
+    var inlineTemplate = vnode.data.inlineTemplate;
+    if (isDef(inlineTemplate)) {
+      options.render = inlineTemplate.render;
+      options.staticRenderFns = inlineTemplate.staticRenderFns;
+    }
+    return new vnode.componentOptions.Ctor(options)
+  }
 
-    var fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      var cloned = fns.slice();
-      for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
-      }
-    } else {
-      // return handler return value for single handlers
-      return fns.apply(null, arguments)
-    }
-  }
-  invoker.fns = fns;
-  return invoker
-}
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, def, cur, old, event;
-  for (name in on) {
-    def = cur = on[name];
-    old = oldOn[name];
-    event = normalizeEvent(name);
-    /* istanbul ignore if */
-    if (isUndef(cur)) {
-      "development" !== 'production' && warn(
-        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
-        vm
-      );
-    } else if (isUndef(old)) {
-      if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+  function installComponentHooks (data) {
+    var hooks = data.hook || (data.hook = {});
+    for (var i = 0; i < hooksToMerge.length; i++) {
+      var key = hooksToMerge[i];
+      var existing = hooks[key];
+      var toMerge = componentVNodeHooks[key];
+      if (existing !== toMerge && !(existing && existing._merged)) {
+        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
-    } else if (cur !== old) {
-      old.fns = cur;
-      on[name] = old;
     }
   }
-  for (name in oldOn) {
-    if (isUndef(on[name])) {
-      event = normalizeEvent(name);
-      remove$$1(event.name, oldOn[name], event.capture);
+
+  function mergeHook$1 (f1, f2) {
+    var merged = function (a, b) {
+      // flow complains about extra args which is why we use any
+      f1(a, b);
+      f2(a, b);
+    };
+    merged._merged = true;
+    return merged
+  }
+
+  // transform component v-model info (value and callback) into
+  // prop and event handler respectively.
+  function transformModel (options, data) {
+    var prop = (options.model && options.model.prop) || 'value';
+    var event = (options.model && options.model.event) || 'input'
+    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+    var on = data.on || (data.on = {});
+    var existing = on[event];
+    var callback = data.model.callback;
+    if (isDef(existing)) {
+      if (
+        Array.isArray(existing)
+          ? existing.indexOf(callback) === -1
+          : existing !== callback
+      ) {
+        on[event] = [callback].concat(existing);
+      }
+    } else {
+      on[event] = callback;
     }
   }
-}
 
-/*  */
+  /*  */
 
-function mergeVNodeHook (def, hookKey, hook) {
-  if (def instanceof VNode) {
-    def = def.data.hook || (def.data.hook = {});
-  }
-  var invoker;
-  var oldHook = def[hookKey];
+  var SIMPLE_NORMALIZE = 1;
+  var ALWAYS_NORMALIZE = 2;
 
-  function wrappedHook () {
-    hook.apply(this, arguments);
-    // important: remove merged hook to ensure it's called only once
-    // and prevent memory leak
-    remove(invoker.fns, wrappedHook);
+  // wrapper function for providing a more flexible interface
+  // without getting yelled at by flow
+  function createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType,
+    alwaysNormalize
+  ) {
+    if (Array.isArray(data) || isPrimitive(data)) {
+      normalizationType = children;
+      children = data;
+      data = undefined;
+    }
+    if (isTrue(alwaysNormalize)) {
+      normalizationType = ALWAYS_NORMALIZE;
+    }
+    return _createElement(context, tag, data, children, normalizationType)
   }
 
-  if (isUndef(oldHook)) {
-    // no existing hook
-    invoker = createFnInvoker([wrappedHook]);
-  } else {
-    /* istanbul ignore if */
-    if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
-      // already a merged invoker
-      invoker = oldHook;
-      invoker.fns.push(wrappedHook);
-    } else {
-      // existing plain hook
-      invoker = createFnInvoker([oldHook, wrappedHook]);
-    }
-  }
-
-  invoker.merged = true;
-  def[hookKey] = invoker;
-}
-
-/*  */
-
-function extractPropsFromVNodeData (
-  data,
-  Ctor,
-  tag
-) {
-  // we are only extracting raw values here.
-  // validation and default values are handled in the child
-  // component itself.
-  var propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
-  }
-  var res = {};
-  var attrs = data.attrs;
-  var props = data.props;
-  if (isDef(attrs) || isDef(props)) {
-    for (var key in propOptions) {
-      var altKey = hyphenate(key);
+  function _createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType
+  ) {
+    if (isDef(data) && isDef((data).__ob__)) {
+      warn(
+        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+        'Always create fresh vnode data objects in each render!',
+        context
+      );
+      return createEmptyVNode()
+    }
+    // object syntax in v-bind
+    if (isDef(data) && isDef(data.is)) {
+      tag = data.is;
+    }
+    if (!tag) {
+      // in case of component :is set to falsy value
+      return createEmptyVNode()
+    }
+    // warn against non-primitive key
+    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+    ) {
       {
-        var keyInLowerCase = key.toLowerCase();
-        if (
-          key !== keyInLowerCase &&
-          attrs && hasOwn(attrs, keyInLowerCase)
-        ) {
-          tip(
-            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-            " \"" + key + "\". " +
-            "Note that HTML attributes are case-insensitive and camelCased " +
-            "props need to use their kebab-case equivalents when using in-DOM " +
-            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+        warn(
+          'Avoid using non-primitive value as key, ' +
+          'use string/number value instead.',
+          context
+        );
+      }
+    }
+    // support single function children as default scoped slot
+    if (Array.isArray(children) &&
+      typeof children[0] === 'function'
+    ) {
+      data = data || {};
+      data.scopedSlots = { default: children[0] };
+      children.length = 0;
+    }
+    if (normalizationType === ALWAYS_NORMALIZE) {
+      children = normalizeChildren(children);
+    } else if (normalizationType === SIMPLE_NORMALIZE) {
+      children = simpleNormalizeChildren(children);
+    }
+    var vnode, ns;
+    if (typeof tag === 'string') {
+      var Ctor;
+      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+      if (config.isReservedTag(tag)) {
+        // platform built-in elements
+        if (isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+          warn(
+            ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+            context
           );
         }
+        vnode = new VNode(
+          config.parsePlatformTagName(tag), data, children,
+          undefined, undefined, context
+        );
+      } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+        // component
+        vnode = createComponent(Ctor, data, context, children, tag);
+      } else {
+        // unknown or unlisted namespaced elements
+        // check at runtime because it may get assigned a namespace when its
+        // parent normalizes children
+        vnode = new VNode(
+          tag, data, children,
+          undefined, undefined, context
+        );
       }
-      checkProp(res, props, key, altKey, true) ||
-      checkProp(res, attrs, key, altKey, false);
+    } else {
+      // direct component options / constructor
+      vnode = createComponent(tag, data, context, children);
+    }
+    if (Array.isArray(vnode)) {
+      return vnode
+    } else if (isDef(vnode)) {
+      if (isDef(ns)) { applyNS(vnode, ns); }
+      if (isDef(data)) { registerDeepBindings(data); }
+      return vnode
+    } else {
+      return createEmptyVNode()
     }
   }
-  return res
-}
 
-function checkProp (
-  res,
-  hash,
-  key,
-  altKey,
-  preserve
-) {
-  if (isDef(hash)) {
-    if (hasOwn(hash, key)) {
-      res[key] = hash[key];
-      if (!preserve) {
-        delete hash[key];
-      }
-      return true
-    } else if (hasOwn(hash, altKey)) {
-      res[key] = hash[altKey];
-      if (!preserve) {
-        delete hash[altKey];
+  function applyNS (vnode, ns, force) {
+    vnode.ns = ns;
+    if (vnode.tag === 'foreignObject') {
+      // use default namespace inside foreignObject
+      ns = undefined;
+      force = true;
+    }
+    if (isDef(vnode.children)) {
+      for (var i = 0, l = vnode.children.length; i < l; i++) {
+        var child = vnode.children[i];
+        if (isDef(child.tag) && (
+          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+          applyNS(child, ns, force);
+        }
       }
-      return true
     }
   }
-  return false
-}
-
-/*  */
-
-// The template compiler attempts to minimize the need for normalization by
-// statically analyzing the template at compile time.
-//
-// For plain HTML markup, normalization can be completely skipped because the
-// generated render function is guaranteed to return Array<VNode>. There are
-// two cases where extra normalization is needed:
-
-// 1. When the children contains components - because a functional component
-// may return an Array instead of a single root. In this case, just a simple
-// normalization is needed - if any child is an Array, we flatten the whole
-// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-// because functional components already normalize their own children.
-function simpleNormalizeChildren (children) {
-  for (var i = 0; i < children.length; i++) {
-    if (Array.isArray(children[i])) {
-      return Array.prototype.concat.apply([], children)
-    }
-  }
-  return children
-}
-
-// 2. When the children contains constructs that always generated nested Arrays,
-// e.g. <template>, <slot>, v-for, or when the children is provided by user
-// with hand-written render functions / JSX. In such cases a full normalization
-// is needed to cater to all possible types of children values.
-function normalizeChildren (children) {
-  return isPrimitive(children)
-    ? [createTextVNode(children)]
-    : Array.isArray(children)
-      ? normalizeArrayChildren(children)
-      : undefined
-}
-
-function isTextNode (node) {
-  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
-}
-
-function normalizeArrayChildren (children, nestedIndex) {
-  var res = [];
-  var i, c, lastIndex, last;
-  for (i = 0; i < children.length; i++) {
-    c = children[i];
-    if (isUndef(c) || typeof c === 'boolean') { continue }
-    lastIndex = res.length - 1;
-    last = res[lastIndex];
-    //  nested
-    if (Array.isArray(c)) {
-      if (c.length > 0) {
-        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-        // merge adjacent text nodes
-        if (isTextNode(c[0]) && isTextNode(last)) {
-          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-          c.shift();
-        }
-        res.push.apply(res, c);
-      }
-    } else if (isPrimitive(c)) {
-      if (isTextNode(last)) {
-        // merge adjacent text nodes
-        // this is necessary for SSR hydration because text nodes are
-        // essentially merged when rendered to HTML strings
-        res[lastIndex] = createTextVNode(last.text + c);
-      } else if (c !== '') {
-        // convert primitive to vnode
-        res.push(createTextVNode(c));
+
+  // ref #5318
+  // necessary to ensure parent re-render when deep bindings like :style and
+  // :class are used on slot nodes
+  function registerDeepBindings (data) {
+    if (isObject(data.style)) {
+      traverse(data.style);
+    }
+    if (isObject(data.class)) {
+      traverse(data.class);
+    }
+  }
+
+  /*  */
+
+  function initRender (vm) {
+    vm._vnode = null; // the root of the child tree
+    vm._staticTrees = null; // v-once cached trees
+    var options = vm.$options;
+    var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+    var renderContext = parentVnode && parentVnode.context;
+    vm.$slots = resolveSlots(options._renderChildren, renderContext);
+    vm.$scopedSlots = emptyObject;
+    // bind the createElement fn to this instance
+    // so that we get proper render context inside it.
+    // args order: tag, data, children, normalizationType, alwaysNormalize
+    // internal version is used by render functions compiled from templates
+    vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+    // normalization is always applied for the public version, used in
+    // user-written render functions.
+    vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+    // $attrs & $listeners are exposed for easier HOC creation.
+    // they need to be reactive so that HOCs using them are always updated
+    var parentData = parentVnode && parentVnode.data;
+
+    /* istanbul ignore else */
+    {
+      defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+      }, true);
+      defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+        !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+      }, true);
+    }
+  }
+
+  var currentRenderingInstance = null;
+
+  function renderMixin (Vue) {
+    // install runtime convenience helpers
+    installRenderHelpers(Vue.prototype);
+
+    Vue.prototype.$nextTick = function (fn) {
+      return nextTick(fn, this)
+    };
+
+    Vue.prototype._render = function () {
+      var vm = this;
+      var ref = vm.$options;
+      var render = ref.render;
+      var _parentVnode = ref._parentVnode;
+
+      if (_parentVnode) {
+        vm.$scopedSlots = normalizeScopedSlots(
+          _parentVnode.data.scopedSlots,
+          vm.$slots,
+          vm.$scopedSlots
+        );
       }
-    } else {
-      if (isTextNode(c) && isTextNode(last)) {
-        // merge adjacent text nodes
-        res[lastIndex] = createTextVNode(last.text + c.text);
-      } else {
-        // default key for nested array children (likely generated by v-for)
-        if (isTrue(children._isVList) &&
-          isDef(c.tag) &&
-          isUndef(c.key) &&
-          isDef(nestedIndex)) {
-          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+
+      // set parent vnode. this allows render functions to have access
+      // to the data on the placeholder node.
+      vm.$vnode = _parentVnode;
+      // render self
+      var vnode;
+      try {
+        // There's no need to maintain a stack because all render fns are called
+        // separately from one another. Nested component's render fns are called
+        // when parent component is patched.
+        currentRenderingInstance = vm;
+        vnode = render.call(vm._renderProxy, vm.$createElement);
+      } catch (e) {
+        handleError(e, vm, "render");
+        // return error render result,
+        // or previous vnode to prevent render error causing blank component
+        /* istanbul ignore else */
+        if (vm.$options.renderError) {
+          try {
+            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+          } catch (e) {
+            handleError(e, vm, "renderError");
+            vnode = vm._vnode;
+          }
+        } else {
+          vnode = vm._vnode;
+        }
+      } finally {
+        currentRenderingInstance = null;
+      }
+      // if the returned array contains only a single node, allow it
+      if (Array.isArray(vnode) && vnode.length === 1) {
+        vnode = vnode[0];
+      }
+      // return empty vnode in case the render function errored out
+      if (!(vnode instanceof VNode)) {
+        if (Array.isArray(vnode)) {
+          warn(
+            'Multiple root nodes returned from render function. Render function ' +
+            'should return a single root node.',
+            vm
+          );
         }
-        res.push(c);
+        vnode = createEmptyVNode();
       }
+      // set parent
+      vnode.parent = _parentVnode;
+      return vnode
+    };
+  }
+
+  /*  */
+
+  function ensureCtor (comp, base) {
+    if (
+      comp.__esModule ||
+      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+    ) {
+      comp = comp.default;
     }
+    return isObject(comp)
+      ? base.extend(comp)
+      : comp
   }
-  return res
-}
 
-/*  */
+  function createAsyncPlaceholder (
+    factory,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    var node = createEmptyVNode();
+    node.asyncFactory = factory;
+    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+    return node
+  }
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  function resolveAsyncComponent (
+    factory,
+    baseCtor
   ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
+    if (isTrue(factory.error) && isDef(factory.errorComp)) {
+      return factory.errorComp
+    }
 
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
+    if (isDef(factory.resolved)) {
+      return factory.resolved
+    }
 
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
+    var owner = currentRenderingInstance;
+    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+      // already pending
+      factory.owners.push(owner);
+    }
 
-    var reject = once(function (reason) {
-      "development" !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
+    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+      return factory.loadingComp
+    }
 
-    var res = factory(resolve, reject);
+    if (owner && !isDef(factory.owners)) {
+      var owners = factory.owners = [owner];
+      var sync = true;
+      var timerLoading = null;
+      var timerTimeout = null
 
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
+      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
 
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
+      var forceRender = function (renderCompleted) {
+        for (var i = 0, l = owners.length; i < l; i++) {
+          (owners[i]).$forceUpdate();
         }
 
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
+        if (renderCompleted) {
+          owners.length = 0;
+          if (timerLoading !== null) {
+            clearTimeout(timerLoading);
+            timerLoading = null;
+          }
+          if (timerTimeout !== null) {
+            clearTimeout(timerTimeout);
+            timerTimeout = null;
           }
         }
+      };
+
+      var resolve = once(function (res) {
+        // cache resolved
+        factory.resolved = ensureCtor(res, baseCtor);
+        // invoke callbacks only if this is not a synchronous resolve
+        // (async resolves are shimmed as synchronous during SSR)
+        if (!sync) {
+          forceRender(true);
+        } else {
+          owners.length = 0;
+        }
+      });
+
+      var reject = once(function (reason) {
+        warn(
+          "Failed to resolve async component: " + (String(factory)) +
+          (reason ? ("\nReason: " + reason) : '')
+        );
+        if (isDef(factory.errorComp)) {
+          factory.error = true;
+          forceRender(true);
+        }
+      });
+
+      var res = factory(resolve, reject);
+
+      if (isObject(res)) {
+        if (isPromise(res)) {
+          // () => Promise
+          if (isUndef(factory.resolved)) {
+            res.then(resolve, reject);
+          }
+        } else if (isPromise(res.component)) {
+          res.component.then(resolve, reject);
+
+          if (isDef(res.error)) {
+            factory.errorComp = ensureCtor(res.error, baseCtor);
+          }
 
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                "timeout (" + (res.timeout) + "ms)"
-              );
+          if (isDef(res.loading)) {
+            factory.loadingComp = ensureCtor(res.loading, baseCtor);
+            if (res.delay === 0) {
+              factory.loading = true;
+            } else {
+              timerLoading = setTimeout(function () {
+                timerLoading = null;
+                if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                  factory.loading = true;
+                  forceRender(false);
+                }
+              }, res.delay || 200);
             }
-          }, res.timeout);
+          }
+
+          if (isDef(res.timeout)) {
+            timerTimeout = setTimeout(function () {
+              timerTimeout = null;
+              if (isUndef(factory.resolved)) {
+                reject(
+                  "timeout (" + (res.timeout) + "ms)"
+                );
+              }
+            }, res.timeout);
+          }
         }
       }
-    }
 
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
+      sync = false;
+      // return in case resolved synchronously
+      return factory.loading
+        ? factory.loadingComp
+        : factory.resolved
+    }
   }
-}
-
-/*  */
 
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
+  /*  */
 
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
+  function getFirstComponentChild (children) {
+    if (Array.isArray(children)) {
+      for (var i = 0; i < children.length; i++) {
+        var c = children[i];
+        if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+          return c
+        }
       }
     }
   }
-}
 
-/*  */
+  /*  */
 
-/*  */
+  /*  */
 
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
+  function initEvents (vm) {
+    vm._events = Object.create(null);
+    vm._hasHookEvent = false;
+    // init parent attached events
+    var listeners = vm.$options._parentListeners;
+    if (listeners) {
+      updateComponentListeners(vm, listeners);
+    }
   }
-}
 
-var target;
+  var target;
 
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
+  function add (event, fn) {
     target.$on(event, fn);
   }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
 
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
+  function remove$1 (event, fn) {
+    target.$off(event, fn);
+  }
 
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
+  function createOnceHandler (event, fn) {
+    var _target = target;
+    return function onceHandler () {
+      var res = fn.apply(null, arguments);
+      if (res !== null) {
+        _target.$off(event, onceHandler);
+      }
     }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
+  }
 
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
+  function updateComponentListeners (
+    vm,
+    listeners,
+    oldListeners
+  ) {
+    target = vm;
+    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+    target = undefined;
+  }
+
+  function eventsMixin (Vue) {
+    var hookRE = /^hook:/;
+    Vue.prototype.$on = function (event, fn) {
+      var vm = this;
+      if (Array.isArray(event)) {
+        for (var i = 0, l = event.length; i < l; i++) {
+          vm.$on(event[i], fn);
+        }
+      } else {
+        (vm._events[event] || (vm._events[event] = [])).push(fn);
+        // optimize hook:event cost by using a boolean flag marked at registration
+        // instead of a hash lookup
+        if (hookRE.test(event)) {
+          vm._hasHookEvent = true;
+        }
       }
       return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
+    };
+
+    Vue.prototype.$once = function (event, fn) {
+      var vm = this;
+      function on () {
+        vm.$off(event, on);
+        fn.apply(vm, arguments);
+      }
+      on.fn = fn;
+      vm.$on(event, on);
       return vm
-    }
-    if (fn) {
+    };
+
+    Vue.prototype.$off = function (event, fn) {
+      var vm = this;
+      // all
+      if (!arguments.length) {
+        vm._events = Object.create(null);
+        return vm
+      }
+      // array of events
+      if (Array.isArray(event)) {
+        for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+          vm.$off(event[i$1], fn);
+        }
+        return vm
+      }
+      // specific event
+      var cbs = vm._events[event];
+      if (!cbs) {
+        return vm
+      }
+      if (!fn) {
+        vm._events[event] = null;
+        return vm
+      }
       // specific handler
       var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
+      var i = cbs.length;
+      while (i--) {
+        cb = cbs[i];
         if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
+          cbs.splice(i, 1);
           break
         }
       }
-    }
-    return vm
-  };
+      return vm
+    };
 
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
+    Vue.prototype.$emit = function (event) {
+      var vm = this;
+      {
+        var lowerCaseEvent = event.toLowerCase();
+        if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+          tip(
+            "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+            (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+            "Note that HTML attributes are case-insensitive and you cannot use " +
+            "v-on to listen to camelCase events when using in-DOM templates. " +
+            "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+          );
+        }
       }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
+      var cbs = vm._events[event];
+      if (cbs) {
+        cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+        var args = toArray(arguments, 1);
+        var info = "event handler for \"" + event + "\"";
+        for (var i = 0, l = cbs.length; i < l; i++) {
+          invokeWithErrorHandling(cbs[i], vm, args, vm, info);
         }
       }
+      return vm
+    };
+  }
+
+  /*  */
+
+  var activeInstance = null;
+  var isUpdatingChildComponent = false;
+
+  function setActiveInstance(vm) {
+    var prevActiveInstance = activeInstance;
+    activeInstance = vm;
+    return function () {
+      activeInstance = prevActiveInstance;
     }
-    return vm
-  };
-}
+  }
 
-/*  */
+  function initLifecycle (vm) {
+    var options = vm.$options;
+
+    // locate first non-abstract parent
+    var parent = options.parent;
+    if (parent && !options.abstract) {
+      while (parent.$options.abstract && parent.$parent) {
+        parent = parent.$parent;
+      }
+      parent.$children.push(vm);
+    }
 
+    vm.$parent = parent;
+    vm.$root = parent ? parent.$root : vm;
 
+    vm.$children = [];
+    vm.$refs = {};
 
-/**
- * Runtime helper for resolving raw children VNodes into a slot object.
- */
-function resolveSlots (
-  children,
-  context
-) {
-  var slots = {};
-  if (!children) {
-    return slots
-  }
-  for (var i = 0, l = children.length; i < l; i++) {
-    var child = children[i];
-    var data = child.data;
-    // remove slot attribute if the node is resolved as a Vue slot node
-    if (data && data.attrs && data.attrs.slot) {
-      delete data.attrs.slot;
-    }
-    // named slots should only be respected if the vnode was rendered in the
-    // same context.
-    if ((child.context === context || child.fnContext === context) &&
-      data && data.slot != null
-    ) {
-      var name = data.slot;
-      var slot = (slots[name] || (slots[name] = []));
-      if (child.tag === 'template') {
-        slot.push.apply(slot, child.children || []);
+    vm._watcher = null;
+    vm._inactive = null;
+    vm._directInactive = false;
+    vm._isMounted = false;
+    vm._isDestroyed = false;
+    vm._isBeingDestroyed = false;
+  }
+
+  function lifecycleMixin (Vue) {
+    Vue.prototype._update = function (vnode, hydrating) {
+      var vm = this;
+      var prevEl = vm.$el;
+      var prevVnode = vm._vnode;
+      var restoreActiveInstance = setActiveInstance(vm);
+      vm._vnode = vnode;
+      // Vue.prototype.__patch__ is injected in entry points
+      // based on the rendering backend used.
+      if (!prevVnode) {
+        // initial render
+        vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
       } else {
-        slot.push(child);
+        // updates
+        vm.$el = vm.__patch__(prevVnode, vnode);
       }
-    } else {
-      (slots.default || (slots.default = [])).push(child);
-    }
-  }
-  // ignore slots that contains only whitespace
-  for (var name$1 in slots) {
-    if (slots[name$1].every(isWhitespace)) {
-      delete slots[name$1];
-    }
-  }
-  return slots
-}
+      restoreActiveInstance();
+      // update __vue__ reference
+      if (prevEl) {
+        prevEl.__vue__ = null;
+      }
+      if (vm.$el) {
+        vm.$el.__vue__ = vm;
+      }
+      // if parent is an HOC, update its $el as well
+      if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+        vm.$parent.$el = vm.$el;
+      }
+      // updated hook is called by the scheduler to ensure that children are
+      // updated in a parent's updated hook.
+    };
 
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
+    Vue.prototype.$forceUpdate = function () {
+      var vm = this;
+      if (vm._watcher) {
+        vm._watcher.update();
+      }
+    };
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
-    }
+    Vue.prototype.$destroy = function () {
+      var vm = this;
+      if (vm._isBeingDestroyed) {
+        return
+      }
+      callHook(vm, 'beforeDestroy');
+      vm._isBeingDestroyed = true;
+      // remove self from parent
+      var parent = vm.$parent;
+      if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+        remove(parent.$children, vm);
+      }
+      // teardown watchers
+      if (vm._watcher) {
+        vm._watcher.teardown();
+      }
+      var i = vm._watchers.length;
+      while (i--) {
+        vm._watchers[i].teardown();
+      }
+      // remove reference from data ob
+      // frozen object may not have observer.
+      if (vm._data.__ob__) {
+        vm._data.__ob__.vmCount--;
+      }
+      // call the last hook...
+      vm._isDestroyed = true;
+      // invoke destroy hooks on current rendered tree
+      vm.__patch__(vm._vnode, null);
+      // fire destroyed hook
+      callHook(vm, 'destroyed');
+      // turn off all instance listeners.
+      vm.$off();
+      // remove __vue__ reference
+      if (vm.$el) {
+        vm.$el.__vue__ = null;
+      }
+      // release circular reference (#6759)
+      if (vm.$vnode) {
+        vm.$vnode.parent = null;
+      }
+    };
   }
-  return res
-}
 
-/*  */
+  function mountComponent (
+    vm,
+    el,
+    hydrating
+  ) {
+    vm.$el = el;
+    if (!vm.$options.render) {
+      vm.$options.render = createEmptyVNode;
+      {
+        /* istanbul ignore if */
+        if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+          vm.$options.el || el) {
+          warn(
+            'You are using the runtime-only build of Vue where the template ' +
+            'compiler is not available. Either pre-compile the templates into ' +
+            'render functions, or use the compiler-included build.',
+            vm
+          );
+        } else {
+          warn(
+            'Failed to mount component: template or render function not defined.',
+            vm
+          );
+        }
+      }
+    }
+    callHook(vm, 'beforeMount');
 
-var activeInstance = null;
-var isUpdatingChildComponent = false;
+    var updateComponent;
+    /* istanbul ignore if */
+    if (config.performance && mark) {
+      updateComponent = function () {
+        var name = vm._name;
+        var id = vm._uid;
+        var startTag = "vue-perf-start:" + id;
+        var endTag = "vue-perf-end:" + id;
+
+        mark(startTag);
+        var vnode = vm._render();
+        mark(endTag);
+        measure(("vue " + name + " render"), startTag, endTag);
+
+        mark(startTag);
+        vm._update(vnode, hydrating);
+        mark(endTag);
+        measure(("vue " + name + " patch"), startTag, endTag);
+      };
+    } else {
+      updateComponent = function () {
+        vm._update(vm._render(), hydrating);
+      };
+    }
 
-function initLifecycle (vm) {
-  var options = vm.$options;
+    // we set this to vm._watcher inside the watcher's constructor
+    // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+    // component's mounted hook), which relies on vm._watcher being already defined
+    new Watcher(vm, updateComponent, noop, {
+      before: function before () {
+        if (vm._isMounted && !vm._isDestroyed) {
+          callHook(vm, 'beforeUpdate');
+        }
+      }
+    }, true /* isRenderWatcher */);
+    hydrating = false;
 
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
+    // manually mounted instance, call mounted on self
+    // mounted is called for render-created child components in its inserted hook
+    if (vm.$vnode == null) {
+      vm._isMounted = true;
+      callHook(vm, 'mounted');
     }
-    parent.$children.push(vm);
+    return vm
   }
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
+  function updateChildComponent (
+    vm,
+    propsData,
+    listeners,
+    parentVnode,
+    renderChildren
+  ) {
+    {
+      isUpdatingChildComponent = true;
+    }
+
+    // determine whether component has slot children
+    // we need to do this before overwriting $options._renderChildren.
+
+    // check if there are dynamic scopedSlots (hand-written or compiled but with
+    // dynamic slot names). Static scoped slots compiled from template has the
+    // "$stable" marker.
+    var newScopedSlots = parentVnode.data.scopedSlots;
+    var oldScopedSlots = vm.$scopedSlots;
+    var hasDynamicScopedSlot = !!(
+      (newScopedSlots && !newScopedSlots.$stable) ||
+      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+      (!newScopedSlots && vm.$scopedSlots.$key)
+    );
 
-  vm.$children = [];
-  vm.$refs = {};
+    // Any static slot children from the parent may have changed during parent's
+    // update. Dynamic scoped slots may also have changed. In such cases, a forced
+    // update is necessary to ensure correctness.
+    var needsForceUpdate = !!(
+      renderChildren ||               // has new static slots
+      vm.$options._renderChildren ||  // has old static slots
+      hasDynamicScopedSlot
+    );
 
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
-}
+    vm.$options._parentVnode = parentVnode;
+    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
 
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
+    if (vm._vnode) { // update child tree's parent
+      vm._vnode.parent = parentVnode;
     }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
+    vm.$options._renderChildren = renderChildren;
+
+    // update $attrs and $listeners hash
+    // these are also reactive so they may trigger child update if the child
+    // used them during render
+    vm.$attrs = parentVnode.data.attrs || emptyObject;
+    vm.$listeners = listeners || emptyObject;
+
+    // update props
+    if (propsData && vm.$options.props) {
+      toggleObserving(false);
+      var props = vm._props;
+      var propKeys = vm.$options._propKeys || [];
+      for (var i = 0; i < propKeys.length; i++) {
+        var key = propKeys[i];
+        var propOptions = vm.$options.props; // wtf flow?
+        props[key] = validateProp(key, propOptions, propsData, vm);
+      }
+      toggleObserving(true);
+      // keep a copy of raw propsData
+      vm.$options.propsData = propsData;
     }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
+
+    // update listeners
+    listeners = listeners || emptyObject;
+    var oldListeners = vm.$options._parentListeners;
+    vm.$options._parentListeners = listeners;
+    updateComponentListeners(vm, listeners, oldListeners);
+
+    // resolve slots + force update if has children
+    if (needsForceUpdate) {
+      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+      vm.$forceUpdate();
     }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
+
+    {
+      isUpdatingChildComponent = false;
     }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
+  }
 
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
+  function isInInactiveTree (vm) {
+    while (vm && (vm = vm.$parent)) {
+      if (vm._inactive) { return true }
     }
-  };
+    return false
+  }
 
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
+  function activateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = false;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    } else if (vm._directInactive) {
       return
     }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
+    if (vm._inactive || vm._inactive === null) {
+      vm._inactive = false;
+      for (var i = 0; i < vm.$children.length; i++) {
+        activateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'activated');
     }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
-    }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
-    }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
+  }
+
+  function deactivateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = true;
+      if (isInInactiveTree(vm)) {
+        return
+      }
     }
-  };
-}
-
-function mountComponent (
-  vm,
-  el,
-  hydrating
-) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
-        warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
-        );
+    if (!vm._inactive) {
+      vm._inactive = true;
+      for (var i = 0; i < vm.$children.length; i++) {
+        deactivateChildComponent(vm.$children[i]);
       }
+      callHook(vm, 'deactivated');
     }
   }
-  callHook(vm, 'beforeMount');
 
-  var updateComponent;
-  /* istanbul ignore if */
-  if ("development" !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
-  } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
+  function callHook (vm, hook) {
+    // #7573 disable dep collection when invoking lifecycle hooks
+    pushTarget();
+    var handlers = vm.$options[hook];
+    var info = hook + " hook";
+    if (handlers) {
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+      }
+    }
+    if (vm._hasHookEvent) {
+      vm.$emit('hook:' + hook);
+    }
+    popTarget();
   }
 
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
-  }
-  return vm
-}
-
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  {
-    isUpdatingChildComponent = true;
-  }
+  /*  */
 
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
+  var MAX_UPDATE_COUNT = 100;
 
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+  var queue = [];
+  var activatedChildren = [];
+  var has = {};
+  var circular = {};
+  var waiting = false;
+  var flushing = false;
+  var index = 0;
 
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
+  /**
+   * Reset the scheduler's state.
+   */
+  function resetSchedulerState () {
+    index = queue.length = activatedChildren.length = 0;
+    has = {};
+    {
+      circular = {};
+    }
+    waiting = flushing = false;
   }
-  vm.$options._renderChildren = renderChildren;
 
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+  // Async edge case #6566 requires saving the timestamp when event listeners are
+  // attached. However, calling performance.now() has a perf overhead especially
+  // if the page has thousands of event listeners. Instead, we take a timestamp
+  // every time the scheduler flushes and use that for all event listeners
+  // attached during that flush.
+  var currentFlushTimestamp = 0;
+
+  // Async edge case fix requires storing an event listener's attach timestamp.
+  var getNow = Date.now;
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
+  // Determine what event timestamp the browser is using. Annoyingly, the
+  // timestamp can either be hi-res (relative to page load) or low-res
+  // (relative to UNIX epoch), so in order to compare time we have to use the
+  // same timestamp type when saving the flush timestamp.
+  // All IE versions use low-res event timestamps, and have problematic clock
+  // implementations (#9632)
+  if (inBrowser && !isIE) {
+    var performance = window.performance;
+    if (
+      performance &&
+      typeof performance.now === 'function' &&
+      getNow() > document.createEvent('Event').timeStamp
+    ) {
+      // if the event timestamp, although evaluated AFTER the Date.now(), is
+      // smaller than it, it means the event is using a hi-res timestamp,
+      // and we need to use the hi-res version for event listener timestamps as
+      // well.
+      getNow = function () { return performance.now(); };
     }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
   }
 
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+  /**
+   * Flush both queues and run the watchers.
+   */
+  function flushSchedulerQueue () {
+    currentFlushTimestamp = getNow();
+    flushing = true;
+    var watcher, id;
+
+    // Sort queue before flush.
+    // This ensures that:
+    // 1. Components are updated from parent to child. (because parent is always
+    //    created before the child)
+    // 2. A component's user watchers are run before its render watcher (because
+    //    user watchers are created before the render watcher)
+    // 3. If a component is destroyed during a parent component's watcher run,
+    //    its watchers can be skipped.
+    queue.sort(function (a, b) { return a.id - b.id; });
+
+    // do not cache length because more watchers might be pushed
+    // as we run existing watchers
+    for (index = 0; index < queue.length; index++) {
+      watcher = queue[index];
+      if (watcher.before) {
+        watcher.before();
+      }
+      id = watcher.id;
+      has[id] = null;
+      watcher.run();
+      // in dev build, check and stop circular updates.
+      if (has[id] != null) {
+        circular[id] = (circular[id] || 0) + 1;
+        if (circular[id] > MAX_UPDATE_COUNT) {
+          warn(
+            'You may have an infinite update loop ' + (
+              watcher.user
+                ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+                : "in a component render function."
+            ),
+            watcher.vm
+          );
+          break
+        }
+      }
+    }
 
-  {
-    isUpdatingChildComponent = false;
-  }
-}
+    // keep copies of post queues before resetting state
+    var activatedQueue = activatedChildren.slice();
+    var updatedQueue = queue.slice();
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
-  }
-  return false
-}
+    resetSchedulerState();
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
+    // call component updated and activated hooks
+    callActivatedHooks(activatedQueue);
+    callUpdatedHooks(updatedQueue);
+
+    // devtool hook
+    /* istanbul ignore if */
+    if (devtools && config.devtools) {
+      devtools.emit('flush');
     }
-  } else if (vm._directInactive) {
-    return
   }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
+
+  function callUpdatedHooks (queue) {
+    var i = queue.length;
+    while (i--) {
+      var watcher = queue[i];
+      var vm = watcher.vm;
+      if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'updated');
+      }
     }
-    callHook(vm, 'activated');
   }
-}
 
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
+  /**
+   * Queue a kept-alive component that was activated during patch.
+   * The queue will be processed after the entire tree has been patched.
+   */
+  function queueActivatedComponent (vm) {
+    // setting _inactive to false here so that a render function can
+    // rely on checking whether it's in an inactive tree (e.g. router-view)
+    vm._inactive = false;
+    activatedChildren.push(vm);
   }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
+
+  function callActivatedHooks (queue) {
+    for (var i = 0; i < queue.length; i++) {
+      queue[i]._inactive = true;
+      activateChildComponent(queue[i], true /* true */);
     }
-    callHook(vm, 'deactivated');
   }
-}
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
+  /**
+   * Push a watcher into the watcher queue.
+   * Jobs with duplicate IDs will be skipped unless it's
+   * pushed when the queue is being flushed.
+   */
+  function queueWatcher (watcher) {
+    var id = watcher.id;
+    if (has[id] == null) {
+      has[id] = true;
+      if (!flushing) {
+        queue.push(watcher);
+      } else {
+        // if already flushing, splice the watcher based on its id
+        // if already past its id, it will be run next immediately.
+        var i = queue.length - 1;
+        while (i > index && queue[i].id > watcher.id) {
+          i--;
+        }
+        queue.splice(i + 1, 0, watcher);
+      }
+      // queue the flush
+      if (!waiting) {
+        waiting = true;
+
+        if (!config.async) {
+          flushSchedulerQueue();
+          return
+        }
+        nextTick(flushSchedulerQueue);
       }
     }
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
 
-/*  */
+  /*  */
 
 
-var MAX_UPDATE_COUNT = 100;
 
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
-
-/**
- * Reset the scheduler's state.
- */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  {
-    circular = {};
-  }
-  waiting = flushing = false;
-}
+  var uid$2 = 0;
 
-/**
- * Flush both queues and run the watchers.
- */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
-
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if ("development" !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
+  /**
+   * A watcher parses an expression, collects dependencies,
+   * and fires callback when the expression value changes.
+   * This is used for both the $watch() api and directives.
+   */
+  var Watcher = function Watcher (
+    vm,
+    expOrFn,
+    cb,
+    options,
+    isRenderWatcher
+  ) {
+    this.vm = vm;
+    if (isRenderWatcher) {
+      vm._watcher = this;
+    }
+    vm._watchers.push(this);
+    // options
+    if (options) {
+      this.deep = !!options.deep;
+      this.user = !!options.user;
+      this.lazy = !!options.lazy;
+      this.sync = !!options.sync;
+      this.before = options.before;
+    } else {
+      this.deep = this.user = this.lazy = this.sync = false;
+    }
+    this.cb = cb;
+    this.id = ++uid$2; // uid for batching
+    this.active = true;
+    this.dirty = this.lazy; // for lazy watchers
+    this.deps = [];
+    this.newDeps = [];
+    this.depIds = new _Set();
+    this.newDepIds = new _Set();
+    this.expression = expOrFn.toString();
+    // parse expression for getter
+    if (typeof expOrFn === 'function') {
+      this.getter = expOrFn;
+    } else {
+      this.getter = parsePath(expOrFn);
+      if (!this.getter) {
+        this.getter = noop;
         warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
+          "Failed watching path: \"" + expOrFn + "\" " +
+          'Watcher only accepts simple dot-delimited paths. ' +
+          'For full control, use a function instead.',
+          vm
         );
-        break
       }
     }
-  }
-
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
-
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
-
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
-  }
-}
+    this.value = this.lazy
+      ? undefined
+      : this.get();
+  };
 
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
+  /**
+   * Evaluate the getter, and re-collect dependencies.
+   */
+  Watcher.prototype.get = function get () {
+    pushTarget(this);
+    var value;
+    var vm = this.vm;
+    try {
+      value = this.getter.call(vm, vm);
+    } catch (e) {
+      if (this.user) {
+        handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+      } else {
+        throw e
+      }
+    } finally {
+      // "touch" every property so they are all tracked as
+      // dependencies for deep watching
+      if (this.deep) {
+        traverse(value);
+      }
+      popTarget();
+      this.cleanupDeps();
     }
-  }
-}
+    return value
+  };
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
-  }
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
+  /**
+   * Add a dependency to this directive.
+   */
+  Watcher.prototype.addDep = function addDep (dep) {
+    var id = dep.id;
+    if (!this.newDepIds.has(id)) {
+      this.newDepIds.add(id);
+      this.newDeps.push(dep);
+      if (!this.depIds.has(id)) {
+        dep.addSub(this);
       }
-      queue.splice(i + 1, 0, watcher);
-    }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
     }
-  }
-}
-
-/*  */
-
-var uid$2 = 0;
+  };
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
-) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
-  }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
-  } else {
-    this.deep = this.user = this.lazy = this.sync = false;
-  }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = expOrFn.toString();
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
-  } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      "development" !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
-    }
-  }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
+  /**
+   * Clean up for dependency collection.
+   */
+  Watcher.prototype.cleanupDeps = function cleanupDeps () {
+    var i = this.deps.length;
+    while (i--) {
+      var dep = this.deps[i];
+      if (!this.newDepIds.has(dep.id)) {
+        dep.removeSub(this);
+      }
+    }
+    var tmp = this.depIds;
+    this.depIds = this.newDepIds;
+    this.newDepIds = tmp;
+    this.newDepIds.clear();
+    tmp = this.deps;
+    this.deps = this.newDeps;
+    this.newDeps = tmp;
+    this.newDeps.length = 0;
+  };
 
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+  /**
+   * Subscriber interface.
+   * Will be called when a dependency changes.
+   */
+  Watcher.prototype.update = function update () {
+    /* istanbul ignore else */
+    if (this.lazy) {
+      this.dirty = true;
+    } else if (this.sync) {
+      this.run();
     } else {
-      throw e
+      queueWatcher(this);
     }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    popTarget();
-    this.cleanupDeps();
-  }
-  return value
-};
+  };
 
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
+  /**
+   * Scheduler job interface.
+   * Will be called by the scheduler.
+   */
+  Watcher.prototype.run = function run () {
+    if (this.active) {
+      var value = this.get();
+      if (
+        value !== this.value ||
+        // Deep watchers and watchers on Object/Arrays should fire even
+        // when the value is the same, because the value may
+        // have mutated.
+        isObject(value) ||
+        this.deep
+      ) {
+        // set new value
+        var oldValue = this.value;
+        this.value = value;
+        if (this.user) {
+          var info = "callback for watcher \"" + (this.expression) + "\"";
+          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info);
+        } else {
+          this.cb.call(this.vm, value, oldValue);
+        }
+      }
     }
-  }
-};
+  };
 
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
+  /**
+   * Evaluate the value of the watcher.
+   * This only gets called for lazy watchers.
+   */
+  Watcher.prototype.evaluate = function evaluate () {
+    this.value = this.get();
+    this.dirty = false;
+  };
 
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
-    }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
-
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
-  } else {
-    queueWatcher(this);
-  }
-};
+  /**
+   * Depend on all deps collected by this watcher.
+   */
+  Watcher.prototype.depend = function depend () {
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].depend();
+    }
+  };
 
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
-      } else {
-        this.cb.call(this.vm, value, oldValue);
+  /**
+   * Remove self from all dependencies' subscriber list.
+   */
+  Watcher.prototype.teardown = function teardown () {
+    if (this.active) {
+      // remove self from vm's watcher list
+      // this is a somewhat expensive operation so we skip it
+      // if the vm is being destroyed.
+      if (!this.vm._isBeingDestroyed) {
+        remove(this.vm._watchers, this);
       }
+      var i = this.deps.length;
+      while (i--) {
+        this.deps[i].removeSub(this);
+      }
+      this.active = false;
     }
-  }
-};
+  };
 
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
-};
+  /*  */
 
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
+  var sharedPropertyDefinition = {
+    enumerable: true,
+    configurable: true,
+    get: noop,
+    set: noop
+  };
 
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
+  function proxy (target, sourceKey, key) {
+    sharedPropertyDefinition.get = function proxyGetter () {
+      return this[sourceKey][key]
+    };
+    sharedPropertyDefinition.set = function proxySetter (val) {
+      this[sourceKey][key] = val;
+    };
+    Object.defineProperty(target, key, sharedPropertyDefinition);
   }
-};
-
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
 
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
+  function initState (vm) {
+    vm._watchers = [];
+    var opts = vm.$options;
+    if (opts.props) { initProps(vm, opts.props); }
+    if (opts.methods) { initMethods(vm, opts.methods); }
+    if (opts.data) {
+      initData(vm);
+    } else {
+      observe(vm._data = {}, true /* asRootData */);
     }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
+    if (opts.computed) { initComputed(vm, opts.computed); }
+    if (opts.watch && opts.watch !== nativeWatch) {
+      initWatch(vm, opts.watch);
     }
-    this.active = false;
   }
-};
-
-/*  */
 
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
-
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function initState (vm) {
-  vm._watchers = [];
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
-  }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
-  }
-}
-
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
+  function initProps (vm, propsOptions) {
+    var propsData = vm.$options.propsData || {};
+    var props = vm._props = {};
+    // cache prop keys so that future props updates can iterate using Array
+    // instead of dynamic object key enumeration.
+    var keys = vm.$options._propKeys = [];
+    var isRoot = !vm.$parent;
+    // root instance props should be converted
+    if (!isRoot) {
+      toggleObserving(false);
+    }
+    var loop = function ( key ) {
+      keys.push(key);
+      var value = validateProp(key, propsOptions, propsData, vm);
+      /* istanbul ignore else */
+      {
+        var hyphenatedKey = hyphenate(key);
+        if (isReservedAttribute(hyphenatedKey) ||
+            config.isReservedAttr(hyphenatedKey)) {
           warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
+            ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
             vm
           );
         }
-      });
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
-    }
-  };
-
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
-}
-
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
-    data = {};
-    "development" !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
+        defineReactive$$1(props, key, value, function () {
+          if (!isRoot && !isUpdatingChildComponent) {
+            warn(
+              "Avoid mutating a prop directly since the value will be " +
+              "overwritten whenever the parent component re-renders. " +
+              "Instead, use a data or computed property based on the prop's " +
+              "value. Prop being mutated: \"" + key + "\"",
+              vm
+            );
+          }
+        });
       }
-    }
-    if (props && hasOwn(props, key)) {
-      "development" !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
-    }
-  }
-  // observe data
-  observe(data, true /* asRootData */);
-}
+      // static props are already proxied on the component's prototype
+      // during Vue.extend(). We only need to proxy props defined at
+      // instantiation here.
+      if (!(key in vm)) {
+        proxy(vm, "_props", key);
+      }
+    };
 
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
+    for (var key in propsOptions) loop( key );
+    toggleObserving(true);
   }
-}
-
-var computedWatcherOptions = { lazy: true };
 
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
-
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if ("development" !== 'production' && getter == null) {
+  function initData (vm) {
+    var data = vm.$options.data;
+    data = vm._data = typeof data === 'function'
+      ? getData(data, vm)
+      : data || {};
+    if (!isPlainObject(data)) {
+      data = {};
       warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
+        'data functions should return an object:\n' +
+        'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
         vm
       );
     }
-
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
+    // proxy data on instance
+    var keys = Object.keys(data);
+    var props = vm.$options.props;
+    var methods = vm.$options.methods;
+    var i = keys.length;
+    while (i--) {
+      var key = keys[i];
+      {
+        if (methods && hasOwn(methods, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a data property."),
+            vm
+          );
+        }
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          "The data property \"" + key + "\" is already declared as a prop. " +
+          "Use prop default value instead.",
+          vm
+        );
+      } else if (!isReserved(key)) {
+        proxy(vm, "_data", key);
+      }
     }
-
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
-    }
-  }
-}
-
-function defineComputed (
-  target,
-  key,
-  userDef
-) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
-  }
-  if ("development" !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
-      warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
-      );
-    };
+    // observe data
+    observe(data, true /* asRootData */);
   }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
 
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
+  function getData (data, vm) {
+    // #7573 disable dep collection when invoking data getters
+    pushTarget();
+    try {
+      return data.call(vm, vm)
+    } catch (e) {
+      handleError(e, vm, "data()");
+      return {}
+    } finally {
+      popTarget();
     }
   }
-}
 
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    {
-      if (methods[key] == null) {
+  var computedWatcherOptions = { lazy: true };
+
+  function initComputed (vm, computed) {
+    // $flow-disable-line
+    var watchers = vm._computedWatchers = Object.create(null);
+    // computed properties are just getters during SSR
+    var isSSR = isServerRendering();
+
+    for (var key in computed) {
+      var userDef = computed[key];
+      var getter = typeof userDef === 'function' ? userDef : userDef.get;
+      if (getter == null) {
         warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
+          ("Getter is missing for computed property \"" + key + "\"."),
           vm
         );
       }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
+
+      if (!isSSR) {
+        // create internal watcher for the computed property.
+        watchers[key] = new Watcher(
+          vm,
+          getter || noop,
+          noop,
+          computedWatcherOptions
         );
       }
-      if ((key in vm) && isReserved(key)) {
-        warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
-        );
+
+      // component-defined computed properties are already defined on the
+      // component prototype. We only need to define computed properties defined
+      // at instantiation here.
+      if (!(key in vm)) {
+        defineComputed(vm, key, userDef);
+      } else {
+        if (key in vm.$data) {
+          warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+        } else if (vm.$options.props && key in vm.$options.props) {
+          warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+        } else if (vm.$options.methods && key in vm.$options.methods) {
+          warn(("The computed property \"" + key + "\" is already defined as a method."), vm);
+        }
       }
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
   }
-}
 
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
-      }
+  function defineComputed (
+    target,
+    key,
+    userDef
+  ) {
+    var shouldCache = !isServerRendering();
+    if (typeof userDef === 'function') {
+      sharedPropertyDefinition.get = shouldCache
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef);
+      sharedPropertyDefinition.set = noop;
     } else {
-      createWatcher(vm, key, handler);
-    }
-  }
-}
-
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
-  }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
-  }
-  return vm.$watch(keyOrFn, handler, options)
-}
-
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
-  {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
+      sharedPropertyDefinition.get = userDef.get
+        ? shouldCache && userDef.cache !== false
+          ? createComputedGetter(key)
+          : createGetterInvoker(userDef.get)
+        : noop;
+      sharedPropertyDefinition.set = userDef.set || noop;
+    }
+    if (sharedPropertyDefinition.set === noop) {
+      sharedPropertyDefinition.set = function () {
+        warn(
+          ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+          this
+        );
+      };
+    }
+    Object.defineProperty(target, key, sharedPropertyDefinition);
   }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
-
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
-    var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
-    }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
-    }
-    return function unwatchFn () {
-      watcher.teardown();
+  function createComputedGetter (key) {
+    return function computedGetter () {
+      var watcher = this._computedWatchers && this._computedWatchers[key];
+      if (watcher) {
+        if (watcher.dirty) {
+          watcher.evaluate();
+        }
+        if (Dep.target) {
+          watcher.depend();
+        }
+        return watcher.value
+      }
     }
-  };
-}
-
-/*  */
+  }
 
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
+  function createGetterInvoker(fn) {
+    return function computedGetter () {
+      return fn.call(this, this)
+    }
   }
-}
 
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
+  function initMethods (vm, methods) {
+    var props = vm.$options.props;
+    for (var key in methods) {
       {
-        defineReactive(vm, key, result[key], function () {
+        if (typeof methods[key] !== 'function') {
           warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
+            "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+            "Did you reference the function correctly?",
             vm
           );
-        });
+        }
+        if (props && hasOwn(props, key)) {
+          warn(
+            ("Method \"" + key + "\" has already been defined as a prop."),
+            vm
+          );
+        }
+        if ((key in vm) && isReserved(key)) {
+          warn(
+            "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+            "Avoid defining component methods that start with _ or $."
+          );
+        }
       }
-    });
-    observerState.shouldConvert = true;
+      vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
+    }
   }
-}
-
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else {
-          warn(("Injection \"" + key + "\" not found"), vm);
+  function initWatch (vm, watch) {
+    for (var key in watch) {
+      var handler = watch[key];
+      if (Array.isArray(handler)) {
+        for (var i = 0; i < handler.length; i++) {
+          createWatcher(vm, key, handler[i]);
         }
+      } else {
+        createWatcher(vm, key, handler);
       }
     }
-    return result
   }
-}
-
-/*  */
 
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
+  function createWatcher (
+    vm,
+    expOrFn,
+    handler,
+    options
+  ) {
+    if (isPlainObject(handler)) {
+      options = handler;
+      handler = handler.handler;
     }
+    if (typeof handler === 'string') {
+      handler = vm[handler];
+    }
+    return vm.$watch(expOrFn, handler, options)
   }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
-
-/*  */
 
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if ("development" !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if ("development" !== 'production' && slotNodes._rendered) {
+  function stateMixin (Vue) {
+    // flow somehow has problems with directly declared definition object
+    // when using Object.defineProperty, so we have to procedurally build up
+    // the object here.
+    var dataDef = {};
+    dataDef.get = function () { return this._data };
+    var propsDef = {};
+    propsDef.get = function () { return this._props };
+    {
+      dataDef.set = function () {
         warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
+          'Avoid replacing instance root $data. ' +
+          'Use nested data properties instead.',
           this
         );
-      }
-      slotNodes._rendered = true;
+      };
+      propsDef.set = function () {
+        warn("$props is readonly.", this);
+      };
     }
-    nodes = slotNodes || fallback;
-  }
+    Object.defineProperty(Vue.prototype, '$data', dataDef);
+    Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
-  }
-}
+    Vue.prototype.$set = set;
+    Vue.prototype.$delete = del;
 
-/*  */
+    Vue.prototype.$watch = function (
+      expOrFn,
+      cb,
+      options
+    ) {
+      var vm = this;
+      if (isPlainObject(cb)) {
+        return createWatcher(vm, expOrFn, cb, options)
+      }
+      options = options || {};
+      options.user = true;
+      var watcher = new Watcher(vm, expOrFn, cb, options);
+      if (options.immediate) {
+        var info = "callback for immediate watcher \"" + (watcher.expression) + "\"";
+        pushTarget();
+        invokeWithErrorHandling(cb, vm, [watcher.value], vm, info);
+        popTarget();
+      }
+      return function unwatchFn () {
+        watcher.teardown();
+      }
+    };
+  }
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
+  /*  */
 
-/*  */
+  var uid$3 = 0;
 
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
+  function initMixin (Vue) {
+    Vue.prototype._init = function (options) {
+      var vm = this;
+      // a uid
+      vm._uid = uid$3++;
 
-/*  */
+      var startTag, endTag;
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        startTag = "vue-perf-start:" + (vm._uid);
+        endTag = "vue-perf-end:" + (vm._uid);
+        mark(startTag);
+      }
+
+      // a flag to avoid this being observed
+      vm._isVue = true;
+      // merge options
+      if (options && options._isComponent) {
+        // optimize internal component instantiation
+        // since dynamic options merging is pretty slow, and none of the
+        // internal component options needs special treatment.
+        initInternalComponent(vm, options);
+      } else {
+        vm.$options = mergeOptions(
+          resolveConstructorOptions(vm.constructor),
+          options || {},
+          vm
+        );
+      }
+      /* istanbul ignore else */
+      {
+        initProxy(vm);
+      }
+      // expose real self
+      vm._self = vm;
+      initLifecycle(vm);
+      initEvents(vm);
+      initRender(vm);
+      callHook(vm, 'beforeCreate');
+      initInjections(vm); // resolve injections before data/props
+      initState(vm);
+      initProvide(vm); // resolve provide after data/props
+      callHook(vm, 'created');
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      "development" !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
+      /* istanbul ignore if */
+      if (config.performance && mark) {
+        vm._name = formatComponentName(vm, false);
+        mark(endTag);
+        measure(("vue " + (vm._name) + " init"), startTag, endTag);
       }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
 
-      for (var key in value) loop( key );
-    }
+      if (vm.$options.el) {
+        vm.$mount(vm.$options.el);
+      }
+    };
   }
-  return data
-}
 
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
-
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
-
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
+  function initInternalComponent (vm, options) {
+    var opts = vm.$options = Object.create(vm.constructor.options);
+    // doing this because it's faster than dynamic enumeration.
+    var parentVnode = options._parentVnode;
+    opts.parent = options.parent;
+    opts._parentVnode = parentVnode;
+
+    var vnodeComponentOptions = parentVnode.componentOptions;
+    opts.propsData = vnodeComponentOptions.propsData;
+    opts._parentListeners = vnodeComponentOptions.listeners;
+    opts._renderChildren = vnodeComponentOptions.children;
+    opts._componentTag = vnodeComponentOptions.tag;
+
+    if (options.render) {
+      opts.render = options.render;
+      opts.staticRenderFns = options.staticRenderFns;
+    }
+  }
+
+  function resolveConstructorOptions (Ctor) {
+    var options = Ctor.options;
+    if (Ctor.super) {
+      var superOptions = resolveConstructorOptions(Ctor.super);
+      var cachedSuperOptions = Ctor.superOptions;
+      if (superOptions !== cachedSuperOptions) {
+        // super option changed,
+        // need to resolve new options.
+        Ctor.superOptions = superOptions;
+        // check if there are any late-modified/attached options (#4976)
+        var modifiedOptions = resolveModifiedOptions(Ctor);
+        // update base extend options
+        if (modifiedOptions) {
+          extend(Ctor.extendOptions, modifiedOptions);
+        }
+        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+        if (options.name) {
+          options.components[options.name] = Ctor;
+        }
       }
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
+    return options
   }
-}
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
-
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      "development" !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
-  }
-  return data
-}
-
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
-/*  */
-
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
+  function resolveModifiedOptions (Ctor) {
+    var modified;
+    var latest = Ctor.options;
+    var sealed = Ctor.sealedOptions;
+    for (var key in latest) {
+      if (latest[key] !== sealed[key]) {
+        if (!modified) { modified = {}; }
+        modified[key] = latest[key];
       }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
     }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
+    return modified
   }
 
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
-  );
-
-  var vnode = options.render.call(null, renderContext._c, renderContext);
-
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
+  function Vue (options) {
+    if (!(this instanceof Vue)
+    ) {
+      warn('Vue is a constructor and should be called with the `new` keyword');
     }
+    this._init(options);
   }
 
-  return vnode
-}
-
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
-  }
-}
-
-/*  */
-
-
+  initMixin(Vue);
+  stateMixin(Vue);
+  eventsMixin(Vue);
+  lifecycleMixin(Vue);
+  renderMixin(Vue);
 
+  /*  */
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
+  function initUse (Vue) {
+    Vue.use = function (plugin) {
+      var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
+      if (installedPlugins.indexOf(plugin) > -1) {
+        return this
+      }
 
+      // additional parameters
+      var args = toArray(arguments, 1);
+      args.unshift(this);
+      if (typeof plugin.install === 'function') {
+        plugin.install.apply(plugin, args);
+      } else if (typeof plugin === 'function') {
+        plugin.apply(null, args);
+      }
+      installedPlugins.push(plugin);
+      return this
+    };
+  }
 
-// Updates the state of the component to weex native render engine.
+  /*  */
 
-/*  */
+  function initMixin$1 (Vue) {
+    Vue.mixin = function (mixin) {
+      this.options = mergeOptions(this.options, mixin);
+      return this
+    };
+  }
 
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
+  /*  */
 
-// listening on native callback
+  function initExtend (Vue) {
+    /**
+     * Each instance constructor, including Vue, has a unique
+     * cid. This enables us to create wrapped "child
+     * constructors" for prototypal inheritance and cache them.
+     */
+    Vue.cid = 0;
+    var cid = 1;
 
-/*  */
+    /**
+     * Class inheritance
+     */
+    Vue.extend = function (extendOptions) {
+      extendOptions = extendOptions || {};
+      var Super = this;
+      var SuperId = Super.cid;
+      var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
+      if (cachedCtors[SuperId]) {
+        return cachedCtors[SuperId]
+      }
 
-/*  */
+      var name = extendOptions.name || Super.options.name;
+      if (name) {
+        validateComponentName(name);
+      }
 
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
+      var Sub = function VueComponent (options) {
+        this._init(options);
+      };
+      Sub.prototype = Object.create(Super.prototype);
+      Sub.prototype.constructor = Sub;
+      Sub.cid = cid++;
+      Sub.options = mergeOptions(
+        Super.options,
+        extendOptions
       );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
-    }
-  },
+      Sub['super'] = Super;
 
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
+      // For props and computed properties, we define the proxy getters on
+      // the Vue instances at extension time, on the extended prototype. This
+      // avoids Object.defineProperty calls for each instance created.
+      if (Sub.options.props) {
+        initProps$1(Sub);
+      }
+      if (Sub.options.computed) {
+        initComputed$1(Sub);
       }
-    }
-  }
-};
 
-var hooksToMerge = Object.keys(componentVNodeHooks);
+      // allow further extension/mixin/plugin usage
+      Sub.extend = Super.extend;
+      Sub.mixin = Super.mixin;
+      Sub.use = Super.use;
 
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
+      // create asset registers, so extended classes
+      // can have their private assets too.
+      ASSET_TYPES.forEach(function (type) {
+        Sub[type] = Super[type];
+      });
+      // enable recursive self-lookup
+      if (name) {
+        Sub.options.components[name] = Sub;
+      }
 
-  var baseCtor = context.$options._base;
+      // keep a reference to the super options at extension time.
+      // later at instantiation we can check if Super's options have
+      // been updated.
+      Sub.superOptions = Super.options;
+      Sub.extendOptions = extendOptions;
+      Sub.sealedOptions = extend({}, Sub.options);
 
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
+      // cache constructor
+      cachedCtors[SuperId] = Sub;
+      return Sub
+    };
   }
 
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
-    }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+  function initProps$1 (Comp) {
+    var props = Comp.options.props;
+    for (var key in props) {
+      proxy(Comp.prototype, "_props", key);
     }
   }
 
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
-
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
+  function initComputed$1 (Comp) {
+    var computed = Comp.options.computed;
+    for (var key in computed) {
+      defineComputed(Comp.prototype, key, computed[key]);
+    }
   }
 
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+  /*  */
 
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
+  function initAssetRegisters (Vue) {
+    /**
+     * Create asset registration methods.
+     */
+    ASSET_TYPES.forEach(function (type) {
+      Vue[type] = function (
+        id,
+        definition
+      ) {
+        if (!definition) {
+          return this.options[type + 's'][id]
+        } else {
+          /* istanbul ignore if */
+          if (type === 'component') {
+            validateComponentName(id);
+          }
+          if (type === 'component' && isPlainObject(definition)) {
+            definition.name = definition.name || id;
+            definition = this.options._base.extend(definition);
+          }
+          if (type === 'directive' && typeof definition === 'function') {
+            definition = { bind: definition, update: definition };
+          }
+          this.options[type + 's'][id] = definition;
+          return definition
+        }
+      };
+    });
   }
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
+  /*  */
 
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
 
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
-    }
-  }
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
 
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
 
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
-
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
-}
-
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
-
-/*  */
-
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
-
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
-  }
-  return _createElement(context, tag, data, children, normalizationType)
-}
-
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    "development" !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
+  function getComponentName (opts) {
+    return opts && (opts.Ctor.options.name || opts.tag)
   }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
+
+  function matches (pattern, name) {
+    if (Array.isArray(pattern)) {
+      return pattern.indexOf(name) > -1
+    } else if (typeof pattern === 'string') {
+      return pattern.split(',').indexOf(name) > -1
+    } else if (isRegExp(pattern)) {
+      return pattern.test(name)
+    }
+    /* istanbul ignore next */
+    return false
   }
-  // warn against non-primitive key
-  if ("development" !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
+
+  function pruneCache (keepAliveInstance, filter) {
+    var cache = keepAliveInstance.cache;
+    var keys = keepAliveInstance.keys;
+    var _vnode = keepAliveInstance._vnode;
+    for (var key in cache) {
+      var entry = cache[key];
+      if (entry) {
+        var name = entry.name;
+        if (name && !filter(name)) {
+          pruneCacheEntry(cache, key, keys, _vnode);
+        }
+      }
     }
   }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
+
+  function pruneCacheEntry (
+    cache,
+    key,
+    keys,
+    current
   ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
+    var entry = cache[key];
+    if (entry && (!current || entry.tag !== current.tag)) {
+      entry.componentInstance.$destroy();
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
+    cache[key] = null;
+    remove(keys, key);
   }
-}
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
+  var patternTypes = [String, RegExp, Array];
 
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
+  var KeepAlive = {
+    name: 'keep-alive',
+    abstract: true,
 
-  Vue.prototype._render = function () {
-    var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
+    props: {
+      include: patternTypes,
+      exclude: patternTypes,
+      max: [String, Number]
+    },
 
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
+    methods: {
+      cacheVNode: function cacheVNode() {
+        var ref = this;
+        var cache = ref.cache;
+        var keys = ref.keys;
+        var vnodeToCache = ref.vnodeToCache;
+        var keyToCache = ref.keyToCache;
+        if (vnodeToCache) {
+          var tag = vnodeToCache.tag;
+          var componentInstance = vnodeToCache.componentInstance;
+          var componentOptions = vnodeToCache.componentOptions;
+          cache[keyToCache] = {
+            name: getComponentName(componentOptions),
+            tag: tag,
+            componentInstance: componentInstance,
+          };
+          keys.push(keyToCache);
+          // prune oldest entry
+          if (this.max && keys.length > parseInt(this.max)) {
+            pruneCacheEntry(cache, keys[0], keys, this._vnode);
+          }
+          this.vnodeToCache = null;
         }
       }
-    }
+    },
 
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
+    created: function created () {
+      this.cache = Object.create(null);
+      this.keys = [];
+    },
 
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      }
-    }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if ("development" !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
+    destroyed: function destroyed () {
+      for (var key in this.cache) {
+        pruneCacheEntry(this.cache, key, this.keys);
       }
-      vnode = createEmptyVNode();
-    }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
-  };
-}
+    },
 
-/*  */
+    mounted: function mounted () {
+      var this$1 = this;
 
-var uid = 0;
+      this.cacheVNode();
+      this.$watch('include', function (val) {
+        pruneCache(this$1, function (name) { return matches(val, name); });
+      });
+      this.$watch('exclude', function (val) {
+        pruneCache(this$1, function (name) { return !matches(val, name); });
+      });
+    },
 
-function initMixin (Vue) {
-  Vue.prototype._init = function (options) {
-    var vm = this;
-    // a uid
-    vm._uid = uid++;
+    updated: function updated () {
+      this.cacheVNode();
+    },
 
-    var startTag, endTag;
-    /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
-      startTag = "vue-perf-start:" + (vm._uid);
-      endTag = "vue-perf-end:" + (vm._uid);
-      mark(startTag);
-    }
-
-    // a flag to avoid this being observed
-    vm._isVue = true;
-    // merge options
-    if (options && options._isComponent) {
-      // optimize internal component instantiation
-      // since dynamic options merging is pretty slow, and none of the
-      // internal component options needs special treatment.
-      initInternalComponent(vm, options);
-    } else {
-      vm.$options = mergeOptions(
-        resolveConstructorOptions(vm.constructor),
-        options || {},
-        vm
-      );
-    }
-    /* istanbul ignore else */
-    {
-      initProxy(vm);
-    }
-    // expose real self
-    vm._self = vm;
-    initLifecycle(vm);
-    initEvents(vm);
-    initRender(vm);
-    callHook(vm, 'beforeCreate');
-    initInjections(vm); // resolve injections before data/props
-    initState(vm);
-    initProvide(vm); // resolve provide after data/props
-    callHook(vm, 'created');
+    render: function render () {
+      var slot = this.$slots.default;
+      var vnode = getFirstComponentChild(slot);
+      var componentOptions = vnode && vnode.componentOptions;
+      if (componentOptions) {
+        // check pattern
+        var name = getComponentName(componentOptions);
+        var ref = this;
+        var include = ref.include;
+        var exclude = ref.exclude;
+        if (
+          // not included
+          (include && (!name || !matches(include, name))) ||
+          // excluded
+          (exclude && name && matches(exclude, name))
+        ) {
+          return vnode
+        }
 
-    /* istanbul ignore if */
-    if ("development" !== 'production' && config.performance && mark) {
-      vm._name = formatComponentName(vm, false);
-      mark(endTag);
-      measure(("vue " + (vm._name) + " init"), startTag, endTag);
-    }
+        var ref$1 = this;
+        var cache = ref$1.cache;
+        var keys = ref$1.keys;
+        var key = vnode.key == null
+          // same constructor may get registered as different local components
+          // so cid alone is not enough (#3269)
+          ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
+          : vnode.key;
+        if (cache[key]) {
+          vnode.componentInstance = cache[key].componentInstance;
+          // make current key freshest
+          remove(keys, key);
+          keys.push(key);
+        } else {
+          // delay setting the cache until update
+          this.vnodeToCache = vnode;
+          this.keyToCache = key;
+        }
 
-    if (vm.$options.el) {
-      vm.$mount(vm.$options.el);
-    }
-  };
-}
-
-function initInternalComponent (vm, options) {
-  var opts = vm.$options = Object.create(vm.constructor.options);
-  // doing this because it's faster than dynamic enumeration.
-  var parentVnode = options._parentVnode;
-  opts.parent = options.parent;
-  opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
-
-  var vnodeComponentOptions = parentVnode.componentOptions;
-  opts.propsData = vnodeComponentOptions.propsData;
-  opts._parentListeners = vnodeComponentOptions.listeners;
-  opts._renderChildren = vnodeComponentOptions.children;
-  opts._componentTag = vnodeComponentOptions.tag;
-
-  if (options.render) {
-    opts.render = options.render;
-    opts.staticRenderFns = options.staticRenderFns;
-  }
-}
-
-function resolveConstructorOptions (Ctor) {
-  var options = Ctor.options;
-  if (Ctor.super) {
-    var superOptions = resolveConstructorOptions(Ctor.super);
-    var cachedSuperOptions = Ctor.superOptions;
-    if (superOptions !== cachedSuperOptions) {
-      // super option changed,
-      // need to resolve new options.
-      Ctor.superOptions = superOptions;
-      // check if there are any late-modified/attached options (#4976)
-      var modifiedOptions = resolveModifiedOptions(Ctor);
-      // update base extend options
-      if (modifiedOptions) {
-        extend(Ctor.extendOptions, modifiedOptions);
-      }
-      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-      if (options.name) {
-        options.components[options.name] = Ctor;
-      }
-    }
-  }
-  return options
-}
-
-function resolveModifiedOptions (Ctor) {
-  var modified;
-  var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
-  var sealed = Ctor.sealedOptions;
-  for (var key in latest) {
-    if (latest[key] !== sealed[key]) {
-      if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-    }
-  }
-  return modified
-}
-
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
+        vnode.data.keepAlive = true;
       }
+      return vnode || (slot && slot[0])
     }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$3 (options) {
-  if ("development" !== 'production' &&
-    !(this instanceof Vue$3)
-  ) {
-    warn('Vue is a constructor and should be called with the `new` keyword');
-  }
-  this._init(options);
-}
-
-initMixin(Vue$3);
-stateMixin(Vue$3);
-eventsMixin(Vue$3);
-lifecycleMixin(Vue$3);
-renderMixin(Vue$3);
-
-/*  */
-
-function initUse (Vue) {
-  Vue.use = function (plugin) {
-    var installedPlugins = (this._installedPlugins || (this._installedPlugins = []));
-    if (installedPlugins.indexOf(plugin) > -1) {
-      return this
-    }
-
-    // additional parameters
-    var args = toArray(arguments, 1);
-    args.unshift(this);
-    if (typeof plugin.install === 'function') {
-      plugin.install.apply(plugin, args);
-    } else if (typeof plugin === 'function') {
-      plugin.apply(null, args);
-    }
-    installedPlugins.push(plugin);
-    return this
   };
-}
-
-/*  */
 
-function initMixin$1 (Vue) {
-  Vue.mixin = function (mixin) {
-    this.options = mergeOptions(this.options, mixin);
-    return this
+  var builtInComponents = {
+    KeepAlive: KeepAlive
   };
-}
-
-/*  */
-
-function initExtend (Vue) {
-  /**
-   * Each instance constructor, including Vue, has a unique
-   * cid. This enables us to create wrapped "child
-   * constructors" for prototypal inheritance and cache them.
-   */
-  Vue.cid = 0;
-  var cid = 1;
-
-  /**
-   * Class inheritance
-   */
-  Vue.extend = function (extendOptions) {
-    extendOptions = extendOptions || {};
-    var Super = this;
-    var SuperId = Super.cid;
-    var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});
-    if (cachedCtors[SuperId]) {
-      return cachedCtors[SuperId]
-    }
 
-    var name = extendOptions.name || Super.options.name;
-    if ("development" !== 'production' && name) {
-      validateComponentName(name);
-    }
-
-    var Sub = function VueComponent (options) {
-      this._init(options);
-    };
-    Sub.prototype = Object.create(Super.prototype);
-    Sub.prototype.constructor = Sub;
-    Sub.cid = cid++;
-    Sub.options = mergeOptions(
-      Super.options,
-      extendOptions
-    );
-    Sub['super'] = Super;
-
-    // For props and computed properties, we define the proxy getters on
-    // the Vue instances at extension time, on the extended prototype. This
-    // avoids Object.defineProperty calls for each instance created.
-    if (Sub.options.props) {
-      initProps$1(Sub);
-    }
-    if (Sub.options.computed) {
-      initComputed$1(Sub);
-    }
-
-    // allow further extension/mixin/plugin usage
-    Sub.extend = Super.extend;
-    Sub.mixin = Super.mixin;
-    Sub.use = Super.use;
+  /*  */
 
-    // create asset registers, so extended classes
-    // can have their private assets too.
-    ASSET_TYPES.forEach(function (type) {
-      Sub[type] = Super[type];
-    });
-    // enable recursive self-lookup
-    if (name) {
-      Sub.options.components[name] = Sub;
+  function initGlobalAPI (Vue) {
+    // config
+    var configDef = {};
+    configDef.get = function () { return config; };
+    {
+      configDef.set = function () {
+        warn(
+          'Do not replace the Vue.config object, set individual fields instead.'
+        );
+      };
     }
+    Object.defineProperty(Vue, 'config', configDef);
 
-    // keep a reference to the super options at extension time.
-    // later at instantiation we can check if Super's options have
-    // been updated.
-    Sub.superOptions = Super.options;
-    Sub.extendOptions = extendOptions;
-    Sub.sealedOptions = extend({}, Sub.options);
-
-    // cache constructor
-    cachedCtors[SuperId] = Sub;
-    return Sub
-  };
-}
-
-function initProps$1 (Comp) {
-  var props = Comp.options.props;
-  for (var key in props) {
-    proxy(Comp.prototype, "_props", key);
-  }
-}
-
-function initComputed$1 (Comp) {
-  var computed = Comp.options.computed;
-  for (var key in computed) {
-    defineComputed(Comp.prototype, key, computed[key]);
-  }
-}
-
-/*  */
-
-function initAssetRegisters (Vue) {
-  /**
-   * Create asset registration methods.
-   */
-  ASSET_TYPES.forEach(function (type) {
-    Vue[type] = function (
-      id,
-      definition
-    ) {
-      if (!definition) {
-        return this.options[type + 's'][id]
-      } else {
-        /* istanbul ignore if */
-        if ("development" !== 'production' && type === 'component') {
-          validateComponentName(id);
-        }
-        if (type === 'component' && isPlainObject(definition)) {
-          definition.name = definition.name || id;
-          definition = this.options._base.extend(definition);
-        }
-        if (type === 'directive' && typeof definition === 'function') {
-          definition = { bind: definition, update: definition };
-        }
-        this.options[type + 's'][id] = definition;
-        return definition
-      }
+    // exposed util methods.
+    // NOTE: these are not considered part of the public API - avoid relying on
+    // them unless you are aware of the risk.
+    Vue.util = {
+      warn: warn,
+      extend: extend,
+      mergeOptions: mergeOptions,
+      defineReactive: defineReactive$$1
+    };
+
+    Vue.set = set;
+    Vue.delete = del;
+    Vue.nextTick = nextTick;
+
+    // 2.6 explicit observable API
+    Vue.observable = function (obj) {
+      observe(obj);
+      return obj
     };
-  });
-}
 
-/*  */
+    Vue.options = Object.create(null);
+    ASSET_TYPES.forEach(function (type) {
+      Vue.options[type + 's'] = Object.create(null);
+    });
 
-function getComponentName (opts) {
-  return opts && (opts.Ctor.options.name || opts.tag)
-}
+    // this is used to identify the "base" constructor to extend all plain-object
+    // components with in Weex's multi-instance scenarios.
+    Vue.options._base = Vue;
 
-function matches (pattern, name) {
-  if (Array.isArray(pattern)) {
-    return pattern.indexOf(name) > -1
-  } else if (typeof pattern === 'string') {
-    return pattern.split(',').indexOf(name) > -1
-  } else if (isRegExp(pattern)) {
-    return pattern.test(name)
+    extend(Vue.options.components, builtInComponents);
+
+    initUse(Vue);
+    initMixin$1(Vue);
+    initExtend(Vue);
+    initAssetRegisters(Vue);
   }
-  /* istanbul ignore next */
-  return false
-}
-
-function pruneCache (keepAliveInstance, filter) {
-  var cache = keepAliveInstance.cache;
-  var keys = keepAliveInstance.keys;
-  var _vnode = keepAliveInstance._vnode;
-  for (var key in cache) {
-    var cachedNode = cache[key];
-    if (cachedNode) {
-      var name = getComponentName(cachedNode.componentOptions);
-      if (name && !filter(name)) {
-        pruneCacheEntry(cache, key, keys, _vnode);
-      }
-    }
-  }
-}
-
-function pruneCacheEntry (
-  cache,
-  key,
-  keys,
-  current
-) {
-  var cached$$1 = cache[key];
-  if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
-    cached$$1.componentInstance.$destroy();
-  }
-  cache[key] = null;
-  remove(keys, key);
-}
-
-var patternTypes = [String, RegExp, Array];
-
-var KeepAlive = {
-  name: 'keep-alive',
-  abstract: true,
-
-  props: {
-    include: patternTypes,
-    exclude: patternTypes,
-    max: [String, Number]
-  },
-
-  created: function created () {
-    this.cache = Object.create(null);
-    this.keys = [];
-  },
-
-  destroyed: function destroyed () {
-    var this$1 = this;
 
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
+  initGlobalAPI(Vue);
+
+  Object.defineProperty(Vue.prototype, '$isServer', {
+    get: isServerRendering
+  });
+
+  Object.defineProperty(Vue.prototype, '$ssrContext', {
+    get: function get () {
+      /* istanbul ignore next */
+      return this.$vnode && this.$vnode.ssrContext
     }
-  },
+  });
 
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
-  },
-
-  render: function render () {
-    var slot = this.$slots.default;
-    var vnode = getFirstComponentChild(slot);
-    var componentOptions = vnode && vnode.componentOptions;
-    if (componentOptions) {
-      // check pattern
-      var name = getComponentName(componentOptions);
-      var ref = this;
-      var include = ref.include;
-      var exclude = ref.exclude;
-      if (
-        // not included
-        (include && (!name || !matches(include, name))) ||
-        // excluded
-        (exclude && name && matches(exclude, name))
-      ) {
-        return vnode
-      }
+  // expose FunctionalRenderContext for ssr runtime helper installation
+  Object.defineProperty(Vue, 'FunctionalRenderContext', {
+    value: FunctionalRenderContext
+  });
 
-      var ref$1 = this;
-      var cache = ref$1.cache;
-      var keys = ref$1.keys;
-      var key = vnode.key == null
-        // same constructor may get registered as different local components
-        // so cid alone is not enough (#3269)
-        ? componentOptions.Ctor.cid + (componentOptions.tag ? ("::" + (componentOptions.tag)) : '')
-        : vnode.key;
-      if (cache[key]) {
-        vnode.componentInstance = cache[key].componentInstance;
-        // make current key freshest
-        remove(keys, key);
-        keys.push(key);
-      } else {
-        cache[key] = vnode;
-        keys.push(key);
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode);
-        }
-      }
+  Vue.version = '2.6.14';
 
-      vnode.data.keepAlive = true;
-    }
-    return vnode || (slot && slot[0])
-  }
-};
+  /*  */
 
-var builtInComponents = {
-  KeepAlive: KeepAlive
-};
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
 
-/*  */
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
+    return (
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
+    )
+  };
 
-function initGlobalAPI (Vue) {
-  // config
-  var configDef = {};
-  configDef.get = function () { return config; };
-  {
-    configDef.set = function () {
-      warn(
-        'Do not replace the Vue.config object, set individual fields instead.'
-      );
-    };
-  }
-  Object.defineProperty(Vue, 'config', configDef);
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
 
-  // exposed util methods.
-  // NOTE: these are not considered part of the public API - avoid relying on
-  // them unless you are aware of the risk.
-  Vue.util = {
-    warn: warn,
-    extend: extend,
-    mergeOptions: mergeOptions,
-    defineReactive: defineReactive
+  var convertEnumeratedValue = function (key, value) {
+    return isFalsyAttrValue(value) || value === 'false'
+      ? 'false'
+      // allow arbitrary string value for contenteditable
+      : key === 'contenteditable' && isValidContentEditableValue(value)
+        ? value
+        : 'true'
   };
 
-  Vue.set = set;
-  Vue.delete = del;
-  Vue.nextTick = nextTick;
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,' +
+    'truespeed,typemustmatch,visible'
+  );
 
-  Vue.options = Object.create(null);
-  ASSET_TYPES.forEach(function (type) {
-    Vue.options[type + 's'] = Object.create(null);
-  });
+  var xlinkNS = 'http://www.w3.org/1999/xlink';
+
+  var isXlink = function (name) {
+    return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
+  };
 
-  // this is used to identify the "base" constructor to extend all plain-object
-  // components with in Weex's multi-instance scenarios.
-  Vue.options._base = Vue;
+  var getXlinkProp = function (name) {
+    return isXlink(name) ? name.slice(6, name.length) : ''
+  };
 
-  extend(Vue.options.components, builtInComponents);
+  var isFalsyAttrValue = function (val) {
+    return val == null || val === false
+  };
 
-  initUse(Vue);
-  initMixin$1(Vue);
-  initExtend(Vue);
-  initAssetRegisters(Vue);
-}
+  /*  */
 
-initGlobalAPI(Vue$3);
+  function genClassForVnode (vnode) {
+    var data = vnode.data;
+    var parentNode = vnode;
+    var childNode = vnode;
+    while (isDef(childNode.componentInstance)) {
+      childNode = childNode.componentInstance._vnode;
+      if (childNode && childNode.data) {
+        data = mergeClassData(childNode.data, data);
+      }
+    }
+    while (isDef(parentNode = parentNode.parent)) {
+      if (parentNode && parentNode.data) {
+        data = mergeClassData(data, parentNode.data);
+      }
+    }
+    return renderClass(data.staticClass, data.class)
+  }
 
-Object.defineProperty(Vue$3.prototype, '$isServer', {
-  get: isServerRendering
-});
+  function mergeClassData (child, parent) {
+    return {
+      staticClass: concat(child.staticClass, parent.staticClass),
+      class: isDef(child.class)
+        ? [child.class, parent.class]
+        : parent.class
+    }
+  }
 
-Object.defineProperty(Vue$3.prototype, '$ssrContext', {
-  get: function get () {
+  function renderClass (
+    staticClass,
+    dynamicClass
+  ) {
+    if (isDef(staticClass) || isDef(dynamicClass)) {
+      return concat(staticClass, stringifyClass(dynamicClass))
+    }
     /* istanbul ignore next */
-    return this.$vnode && this.$vnode.ssrContext
+    return ''
   }
-});
-
-Vue$3.version = '2.5.13';
 
-/*  */
+  function concat (a, b) {
+    return a ? b ? (a + ' ' + b) : a : (b || '')
+  }
 
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
+  function stringifyClass (value) {
+    if (Array.isArray(value)) {
+      return stringifyArray(value)
+    }
+    if (isObject(value)) {
+      return stringifyObject(value)
+    }
+    if (typeof value === 'string') {
+      return value
+    }
+    /* istanbul ignore next */
+    return ''
+  }
 
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
+  function stringifyArray (value) {
+    var res = '';
+    var stringified;
+    for (var i = 0, l = value.length; i < l; i++) {
+      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+        if (res) { res += ' '; }
+        res += stringified;
+      }
+    }
+    return res
+  }
 
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+  function stringifyObject (value) {
+    var res = '';
+    for (var key in value) {
+      if (value[key]) {
+        if (res) { res += ' '; }
+        res += key;
+      }
+    }
+    return res
+  }
 
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
+  /*  */
 
-var xlinkNS = 'http://www.w3.org/1999/xlink';
+  var namespaceMap = {
+    svg: 'http://www.w3.org/2000/svg',
+    math: 'http://www.w3.org/1998/Math/MathML'
+  };
 
-var isXlink = function (name) {
-  return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink'
-};
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
 
-var getXlinkProp = function (name) {
-  return isXlink(name) ? name.slice(6, name.length) : ''
-};
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
 
-var isFalsyAttrValue = function (val) {
-  return val == null || val === false
-};
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
+  };
 
-/*  */
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
+    }
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
+    }
+  }
 
-function genClassForVnode (vnode) {
-  var data = vnode.data;
-  var parentNode = vnode;
-  var childNode = vnode;
-  while (isDef(childNode.componentInstance)) {
-    childNode = childNode.componentInstance._vnode;
-    if (childNode && childNode.data) {
-      data = mergeClassData(childNode.data, data);
+  var unknownElementCache = Object.create(null);
+  function isUnknownElement (tag) {
+    /* istanbul ignore if */
+    if (!inBrowser) {
+      return true
+    }
+    if (isReservedTag(tag)) {
+      return false
+    }
+    tag = tag.toLowerCase();
+    /* istanbul ignore if */
+    if (unknownElementCache[tag] != null) {
+      return unknownElementCache[tag]
+    }
+    var el = document.createElement(tag);
+    if (tag.indexOf('-') > -1) {
+      // http://stackoverflow.com/a/28210364/1070244
+      return (unknownElementCache[tag] = (
+        el.constructor === window.HTMLUnknownElement ||
+        el.constructor === window.HTMLElement
+      ))
+    } else {
+      return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
     }
   }
-  while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode && parentNode.data) {
-      data = mergeClassData(data, parentNode.data);
+
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+  /*  */
+
+  /**
+   * Query an element selector if it's not an element already.
+   */
+  function query (el) {
+    if (typeof el === 'string') {
+      var selected = document.querySelector(el);
+      if (!selected) {
+        warn(
+          'Cannot find element: ' + el
+        );
+        return document.createElement('div')
+      }
+      return selected
+    } else {
+      return el
     }
   }
-  return renderClass(data.staticClass, data.class)
-}
 
-function mergeClassData (child, parent) {
-  return {
-    staticClass: concat(child.staticClass, parent.staticClass),
-    class: isDef(child.class)
-      ? [child.class, parent.class]
-      : parent.class
+  /*  */
+
+  function createElement$1 (tagName, vnode) {
+    var elm = document.createElement(tagName);
+    if (tagName !== 'select') {
+      return elm
+    }
+    // false or null will remove the attribute but undefined will not
+    if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
+      elm.setAttribute('multiple', 'multiple');
+    }
+    return elm
   }
-}
 
-function renderClass (
-  staticClass,
-  dynamicClass
-) {
-  if (isDef(staticClass) || isDef(dynamicClass)) {
-    return concat(staticClass, stringifyClass(dynamicClass))
+  function createElementNS (namespace, tagName) {
+    return document.createElementNS(namespaceMap[namespace], tagName)
   }
-  /* istanbul ignore next */
-  return ''
-}
 
-function concat (a, b) {
-  return a ? b ? (a + ' ' + b) : a : (b || '')
-}
+  function createTextNode (text) {
+    return document.createTextNode(text)
+  }
 
-function stringifyClass (value) {
-  if (Array.isArray(value)) {
-    return stringifyArray(value)
+  function createComment (text) {
+    return document.createComment(text)
   }
-  if (isObject(value)) {
-    return stringifyObject(value)
+
+  function insertBefore (parentNode, newNode, referenceNode) {
+    parentNode.insertBefore(newNode, referenceNode);
   }
-  if (typeof value === 'string') {
-    return value
+
+  function removeChild (node, child) {
+    node.removeChild(child);
   }
-  /* istanbul ignore next */
-  return ''
-}
-
-function stringifyArray (value) {
-  var res = '';
-  var stringified;
-  for (var i = 0, l = value.length; i < l; i++) {
-    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-      if (res) { res += ' '; }
-      res += stringified;
-    }
-  }
-  return res
-}
-
-function stringifyObject (value) {
-  var res = '';
-  for (var key in value) {
-    if (value[key]) {
-      if (res) { res += ' '; }
-      res += key;
-    }
-  }
-  return res
-}
-
-/*  */
-
-var namespaceMap = {
-  svg: 'http://www.w3.org/2000/svg',
-  math: 'http://www.w3.org/1998/Math/MathML'
-};
-
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
-
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
-
-
-
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
-
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
-  }
-}
-
-var unknownElementCache = Object.create(null);
-function isUnknownElement (tag) {
-  /* istanbul ignore if */
-  if (!inBrowser) {
-    return true
+
+  function appendChild (node, child) {
+    node.appendChild(child);
   }
-  if (isReservedTag(tag)) {
-    return false
+
+  function parentNode (node) {
+    return node.parentNode
   }
-  tag = tag.toLowerCase();
-  /* istanbul ignore if */
-  if (unknownElementCache[tag] != null) {
-    return unknownElementCache[tag]
-  }
-  var el = document.createElement(tag);
-  if (tag.indexOf('-') > -1) {
-    // http://stackoverflow.com/a/28210364/1070244
-    return (unknownElementCache[tag] = (
-      el.constructor === window.HTMLUnknownElement ||
-      el.constructor === window.HTMLElement
-    ))
-  } else {
-    return (unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString()))
+
+  function nextSibling (node) {
+    return node.nextSibling
   }
-}
 
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+  function tagName (node) {
+    return node.tagName
+  }
 
-/*  */
+  function setTextContent (node, text) {
+    node.textContent = text;
+  }
 
-/**
- * Query an element selector if it's not an element already.
- */
-function query (el) {
-  if (typeof el === 'string') {
-    var selected = document.querySelector(el);
-    if (!selected) {
-      "development" !== 'production' && warn(
-        'Cannot find element: ' + el
-      );
-      return document.createElement('div')
-    }
-    return selected
-  } else {
-    return el
+  function setStyleScope (node, scopeId) {
+    node.setAttribute(scopeId, '');
   }
-}
 
-/*  */
+  var nodeOps = /*#__PURE__*/Object.freeze({
+    createElement: createElement$1,
+    createElementNS: createElementNS,
+    createTextNode: createTextNode,
+    createComment: createComment,
+    insertBefore: insertBefore,
+    removeChild: removeChild,
+    appendChild: appendChild,
+    parentNode: parentNode,
+    nextSibling: nextSibling,
+    tagName: tagName,
+    setTextContent: setTextContent,
+    setStyleScope: setStyleScope
+  });
 
-function createElement$1 (tagName, vnode) {
-  var elm = document.createElement(tagName);
-  if (tagName !== 'select') {
-    return elm
-  }
-  // false or null will remove the attribute but undefined will not
-  if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
-    elm.setAttribute('multiple', 'multiple');
-  }
-  return elm
-}
-
-function createElementNS (namespace, tagName) {
-  return document.createElementNS(namespaceMap[namespace], tagName)
-}
-
-function createTextNode (text) {
-  return document.createTextNode(text)
-}
-
-function createComment (text) {
-  return document.createComment(text)
-}
-
-function insertBefore (parentNode, newNode, referenceNode) {
-  parentNode.insertBefore(newNode, referenceNode);
-}
-
-function removeChild (node, child) {
-  node.removeChild(child);
-}
-
-function appendChild (node, child) {
-  node.appendChild(child);
-}
-
-function parentNode (node) {
-  return node.parentNode
-}
-
-function nextSibling (node) {
-  return node.nextSibling
-}
-
-function tagName (node) {
-  return node.tagName
-}
-
-function setTextContent (node, text) {
-  node.textContent = text;
-}
-
-function setAttribute (node, key, val) {
-  node.setAttribute(key, val);
-}
-
-
-var nodeOps = Object.freeze({
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
-});
-
-/*  */
-
-var ref = {
-  create: function create (_, vnode) {
-    registerRef(vnode);
-  },
-  update: function update (oldVnode, vnode) {
-    if (oldVnode.data.ref !== vnode.data.ref) {
-      registerRef(oldVnode, true);
+  /*  */
+
+  var ref = {
+    create: function create (_, vnode) {
       registerRef(vnode);
+    },
+    update: function update (oldVnode, vnode) {
+      if (oldVnode.data.ref !== vnode.data.ref) {
+        registerRef(oldVnode, true);
+        registerRef(vnode);
+      }
+    },
+    destroy: function destroy (vnode) {
+      registerRef(vnode, true);
     }
-  },
-  destroy: function destroy (vnode) {
-    registerRef(vnode, true);
-  }
-};
+  };
 
-function registerRef (vnode, isRemoval) {
-  var key = vnode.data.ref;
-  if (!key) { return }
+  function registerRef (vnode, isRemoval) {
+    var key = vnode.data.ref;
+    if (!isDef(key)) { return }
 
-  var vm = vnode.context;
-  var ref = vnode.componentInstance || vnode.elm;
-  var refs = vm.$refs;
-  if (isRemoval) {
-    if (Array.isArray(refs[key])) {
-      remove(refs[key], ref);
-    } else if (refs[key] === ref) {
-      refs[key] = undefined;
-    }
-  } else {
-    if (vnode.data.refInFor) {
-      if (!Array.isArray(refs[key])) {
-        refs[key] = [ref];
-      } else if (refs[key].indexOf(ref) < 0) {
-        // $flow-disable-line
-        refs[key].push(ref);
+    var vm = vnode.context;
+    var ref = vnode.componentInstance || vnode.elm;
+    var refs = vm.$refs;
+    if (isRemoval) {
+      if (Array.isArray(refs[key])) {
+        remove(refs[key], ref);
+      } else if (refs[key] === ref) {
+        refs[key] = undefined;
       }
     } else {
-      refs[key] = ref;
+      if (vnode.data.refInFor) {
+        if (!Array.isArray(refs[key])) {
+          refs[key] = [ref];
+        } else if (refs[key].indexOf(ref) < 0) {
+          // $flow-disable-line
+          refs[key].push(ref);
+        }
+      } else {
+        refs[key] = ref;
+      }
     }
   }
-}
 
-/**
- * Virtual DOM patching algorithm based on Snabbdom by
- * Simon Friis Vindum (@paldepind)
- * Licensed under the MIT License
- * https://github.com/paldepind/snabbdom/blob/master/LICENSE
- *
- * modified by Evan You (@yyx990803)
- *
- * Not type-checking this because this file is perf-critical and the cost
- * of making flow understand it is not worth it.
- */
+  /**
+   * Virtual DOM patching algorithm based on Snabbdom by
+   * Simon Friis Vindum (@paldepind)
+   * Licensed under the MIT License
+   * https://github.com/paldepind/snabbdom/blob/master/LICENSE
+   *
+   * modified by Evan You (@yyx990803)
+   *
+   * Not type-checking this because this file is perf-critical and the cost
+   * of making flow understand it is not worth it.
+   */
 
-var emptyNode = new VNode('', {}, []);
-
-var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
-
-function sameVnode (a, b) {
-  return (
-    a.key === b.key && (
-      (
-        a.tag === b.tag &&
-        a.isComment === b.isComment &&
-        isDef(a.data) === isDef(b.data) &&
-        sameInputType(a, b)
-      ) || (
-        isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
-        isUndef(b.asyncFactory.error)
+  var emptyNode = new VNode('', {}, []);
+
+  var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];
+
+  function sameVnode (a, b) {
+    return (
+      a.key === b.key &&
+      a.asyncFactory === b.asyncFactory && (
+        (
+          a.tag === b.tag &&
+          a.isComment === b.isComment &&
+          isDef(a.data) === isDef(b.data) &&
+          sameInputType(a, b)
+        ) || (
+          isTrue(a.isAsyncPlaceholder) &&
+          isUndef(b.asyncFactory.error)
+        )
       )
     )
-  )
-}
+  }
 
-function sameInputType (a, b) {
-  if (a.tag !== 'input') { return true }
-  var i;
-  var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
-  var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
-  return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
-}
+  function sameInputType (a, b) {
+    if (a.tag !== 'input') { return true }
+    var i;
+    var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
+    var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
+    return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB)
+  }
 
-function createKeyToOldIdx (children, beginIdx, endIdx) {
-  var i, key;
-  var map = {};
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) { map[key] = i; }
+  function createKeyToOldIdx (children, beginIdx, endIdx) {
+    var i, key;
+    var map = {};
+    for (i = beginIdx; i <= endIdx; ++i) {
+      key = children[i].key;
+      if (isDef(key)) { map[key] = i; }
+    }
+    return map
   }
-  return map
-}
 
-function createPatchFunction (backend) {
-  var i, j;
-  var cbs = {};
+  function createPatchFunction (backend) {
+    var i, j;
+    var cbs = {};
 
-  var modules = backend.modules;
-  var nodeOps = backend.nodeOps;
+    var modules = backend.modules;
+    var nodeOps = backend.nodeOps;
 
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (isDef(modules[j][hooks[i]])) {
-        cbs[hooks[i]].push(modules[j][hooks[i]]);
+    for (i = 0; i < hooks.length; ++i) {
+      cbs[hooks[i]] = [];
+      for (j = 0; j < modules.length; ++j) {
+        if (isDef(modules[j][hooks[i]])) {
+          cbs[hooks[i]].push(modules[j][hooks[i]]);
+        }
       }
     }
-  }
 
-  function emptyNodeAt (elm) {
-    return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
-  }
+    function emptyNodeAt (elm) {
+      return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm)
+    }
 
-  function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
-        removeNode(childElm);
+    function createRmCb (childElm, listeners) {
+      function remove$$1 () {
+        if (--remove$$1.listeners === 0) {
+          removeNode(childElm);
+        }
       }
+      remove$$1.listeners = listeners;
+      return remove$$1
     }
-    remove.listeners = listeners;
-    return remove
-  }
 
-  function removeNode (el) {
-    var parent = nodeOps.parentNode(el);
-    // element may have already been removed due to v-html / v-text
-    if (isDef(parent)) {
-      nodeOps.removeChild(parent, el);
+    function removeNode (el) {
+      var parent = nodeOps.parentNode(el);
+      // element may have already been removed due to v-html / v-text
+      if (isDef(parent)) {
+        nodeOps.removeChild(parent, el);
+      }
     }
-  }
 
-  function isUnknownElement$$1 (vnode, inVPre) {
-    return (
-      !inVPre &&
-      !vnode.ns &&
-      !(
-        config.ignoredElements.length &&
-        config.ignoredElements.some(function (ignore) {
-          return isRegExp(ignore)
-            ? ignore.test(vnode.tag)
-            : ignore === vnode.tag
-        })
-      ) &&
-      config.isUnknownElement(vnode.tag)
-    )
-  }
-
-  var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
-    vnode.isRootInsert = !nested; // for transition enter check
-    if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
-      return
+    function isUnknownElement$$1 (vnode, inVPre) {
+      return (
+        !inVPre &&
+        !vnode.ns &&
+        !(
+          config.ignoredElements.length &&
+          config.ignoredElements.some(function (ignore) {
+            return isRegExp(ignore)
+              ? ignore.test(vnode.tag)
+              : ignore === vnode.tag
+          })
+        ) &&
+        config.isUnknownElement(vnode.tag)
+      )
     }
 
-    var data = vnode.data;
-    var children = vnode.children;
-    var tag = vnode.tag;
-    if (isDef(tag)) {
-      {
-        if (data && data.pre) {
-          creatingElmInVPre++;
+    var creatingElmInVPre = 0;
+
+    function createElm (
+      vnode,
+      insertedVnodeQueue,
+      parentElm,
+      refElm,
+      nested,
+      ownerArray,
+      index
+    ) {
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // This vnode was used in a previous render!
+        // now it's used as a new node, overwriting its elm would cause
+        // potential patch errors down the road when it's used as an insertion
+        // reference node. Instead, we clone the node on-demand before creating
+        // associated DOM element for it.
+        vnode = ownerArray[index] = cloneVNode(vnode);
+      }
+
+      vnode.isRootInsert = !nested; // for transition enter check
+      if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
+        return
+      }
+
+      var data = vnode.data;
+      var children = vnode.children;
+      var tag = vnode.tag;
+      if (isDef(tag)) {
+        {
+          if (data && data.pre) {
+            creatingElmInVPre++;
+          }
+          if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
+            warn(
+              'Unknown custom element: <' + tag + '> - did you ' +
+              'register the component correctly? For recursive components, ' +
+              'make sure to provide the "name" option.',
+              vnode.context
+            );
+          }
         }
-        if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
-          warn(
-            'Unknown custom element: <' + tag + '> - did you ' +
-            'register the component correctly? For recursive components, ' +
-            'make sure to provide the "name" option.',
-            vnode.context
-          );
+
+        vnode.elm = vnode.ns
+          ? nodeOps.createElementNS(vnode.ns, tag)
+          : nodeOps.createElement(tag, vnode);
+        setScope(vnode);
+
+        /* istanbul ignore if */
+        {
+          createChildren(vnode, children, insertedVnodeQueue);
+          if (isDef(data)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+          }
+          insert(parentElm, vnode.elm, refElm);
         }
-      }
-      vnode.elm = vnode.ns
-        ? nodeOps.createElementNS(vnode.ns, tag)
-        : nodeOps.createElement(tag, vnode);
-      setScope(vnode);
 
-      /* istanbul ignore if */
-      {
-        createChildren(vnode, children, insertedVnodeQueue);
-        if (isDef(data)) {
-          invokeCreateHooks(vnode, insertedVnodeQueue);
+        if (data && data.pre) {
+          creatingElmInVPre--;
         }
+      } else if (isTrue(vnode.isComment)) {
+        vnode.elm = nodeOps.createComment(vnode.text);
+        insert(parentElm, vnode.elm, refElm);
+      } else {
+        vnode.elm = nodeOps.createTextNode(vnode.text);
         insert(parentElm, vnode.elm, refElm);
       }
-
-      if ("development" !== 'production' && data && data.pre) {
-        creatingElmInVPre--;
-      }
-    } else if (isTrue(vnode.isComment)) {
-      vnode.elm = nodeOps.createComment(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
-    } else {
-      vnode.elm = nodeOps.createTextNode(vnode.text);
-      insert(parentElm, vnode.elm, refElm);
     }
-  }
 
-  function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i = vnode.data;
-    if (isDef(i)) {
-      var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
-      if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
-      }
-      // after calling the init hook, if the vnode is a child component
-      // it should've created a child instance and mounted it. the child
-      // component also has set the placeholder vnode's elm.
-      // in that case we can just return the element and be done.
-      if (isDef(vnode.componentInstance)) {
-        initComponent(vnode, insertedVnodeQueue);
-        if (isTrue(isReactivated)) {
-          reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+    function createComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i = vnode.data;
+      if (isDef(i)) {
+        var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
+        if (isDef(i = i.hook) && isDef(i = i.init)) {
+          i(vnode, false /* hydrating */);
+        }
+        // after calling the init hook, if the vnode is a child component
+        // it should've created a child instance and mounted it. the child
+        // component also has set the placeholder vnode's elm.
+        // in that case we can just return the element and be done.
+        if (isDef(vnode.componentInstance)) {
+          initComponent(vnode, insertedVnodeQueue);
+          insert(parentElm, vnode.elm, refElm);
+          if (isTrue(isReactivated)) {
+            reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
+          }
+          return true
         }
-        return true
       }
     }
-  }
 
-  function initComponent (vnode, insertedVnodeQueue) {
-    if (isDef(vnode.data.pendingInsert)) {
-      insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
-      vnode.data.pendingInsert = null;
-    }
-    vnode.elm = vnode.componentInstance.$el;
-    if (isPatchable(vnode)) {
-      invokeCreateHooks(vnode, insertedVnodeQueue);
-      setScope(vnode);
-    } else {
-      // empty component root.
-      // skip all element-related modules except for ref (#3455)
-      registerRef(vnode);
-      // make sure to invoke the insert hook
-      insertedVnodeQueue.push(vnode);
+    function initComponent (vnode, insertedVnodeQueue) {
+      if (isDef(vnode.data.pendingInsert)) {
+        insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
+        vnode.data.pendingInsert = null;
+      }
+      vnode.elm = vnode.componentInstance.$el;
+      if (isPatchable(vnode)) {
+        invokeCreateHooks(vnode, insertedVnodeQueue);
+        setScope(vnode);
+      } else {
+        // empty component root.
+        // skip all element-related modules except for ref (#3455)
+        registerRef(vnode);
+        // make sure to invoke the insert hook
+        insertedVnodeQueue.push(vnode);
+      }
     }
-  }
 
-  function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
-    var i;
-    // hack for #4339: a reactivated component with inner transition
-    // does not trigger because the inner node's created hooks are not called
-    // again. It's not ideal to involve module-specific logic in here but
-    // there doesn't seem to be a better way to do it.
-    var innerNode = vnode;
-    while (innerNode.componentInstance) {
-      innerNode = innerNode.componentInstance._vnode;
-      if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
-        for (i = 0; i < cbs.activate.length; ++i) {
-          cbs.activate[i](emptyNode, innerNode);
+    function reactivateComponent (vnode, insertedVnodeQueue, parentElm, refElm) {
+      var i;
+      // hack for #4339: a reactivated component with inner transition
+      // does not trigger because the inner node's created hooks are not called
+      // again. It's not ideal to involve module-specific logic in here but
+      // there doesn't seem to be a better way to do it.
+      var innerNode = vnode;
+      while (innerNode.componentInstance) {
+        innerNode = innerNode.componentInstance._vnode;
+        if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
+          for (i = 0; i < cbs.activate.length; ++i) {
+            cbs.activate[i](emptyNode, innerNode);
+          }
+          insertedVnodeQueue.push(innerNode);
+          break
         }
-        insertedVnodeQueue.push(innerNode);
-        break
       }
+      // unlike a newly created component,
+      // a reactivated keep-alive component doesn't insert itself
+      insert(parentElm, vnode.elm, refElm);
     }
-    // unlike a newly created component,
-    // a reactivated keep-alive component doesn't insert itself
-    insert(parentElm, vnode.elm, refElm);
-  }
 
-  function insert (parent, elm, ref$$1) {
-    if (isDef(parent)) {
-      if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
-          nodeOps.insertBefore(parent, elm, ref$$1);
+    function insert (parent, elm, ref$$1) {
+      if (isDef(parent)) {
+        if (isDef(ref$$1)) {
+          if (nodeOps.parentNode(ref$$1) === parent) {
+            nodeOps.insertBefore(parent, elm, ref$$1);
+          }
+        } else {
+          nodeOps.appendChild(parent, elm);
         }
-      } else {
-        nodeOps.appendChild(parent, elm);
       }
     }
-  }
 
-  function createChildren (vnode, children, insertedVnodeQueue) {
-    if (Array.isArray(children)) {
-      {
-        checkDuplicateKeys(children);
-      }
-      for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+    function createChildren (vnode, children, insertedVnodeQueue) {
+      if (Array.isArray(children)) {
+        {
+          checkDuplicateKeys(children);
+        }
+        for (var i = 0; i < children.length; ++i) {
+          createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
+        }
+      } else if (isPrimitive(vnode.text)) {
+        nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
       }
-    } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
     }
-  }
 
-  function isPatchable (vnode) {
-    while (vnode.componentInstance) {
-      vnode = vnode.componentInstance._vnode;
+    function isPatchable (vnode) {
+      while (vnode.componentInstance) {
+        vnode = vnode.componentInstance._vnode;
+      }
+      return isDef(vnode.tag)
     }
-    return isDef(vnode.tag)
-  }
 
-  function invokeCreateHooks (vnode, insertedVnodeQueue) {
-    for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-      cbs.create[i$1](emptyNode, vnode);
-    }
-    i = vnode.data.hook; // Reuse variable
-    if (isDef(i)) {
-      if (isDef(i.create)) { i.create(emptyNode, vnode); }
-      if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+    function invokeCreateHooks (vnode, insertedVnodeQueue) {
+      for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+        cbs.create[i$1](emptyNode, vnode);
+      }
+      i = vnode.data.hook; // Reuse variable
+      if (isDef(i)) {
+        if (isDef(i.create)) { i.create(emptyNode, vnode); }
+        if (isDef(i.insert)) { insertedVnodeQueue.push(vnode); }
+      }
     }
-  }
 
-  // set scope id attribute for scoped CSS.
-  // this is implemented as a special case to avoid the overhead
-  // of going through the normal attribute patching process.
-  function setScope (vnode) {
-    var i;
-    if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    } else {
-      var ancestor = vnode;
-      while (ancestor) {
-        if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
+    // set scope id attribute for scoped CSS.
+    // this is implemented as a special case to avoid the overhead
+    // of going through the normal attribute patching process.
+    function setScope (vnode) {
+      var i;
+      if (isDef(i = vnode.fnScopeId)) {
+        nodeOps.setStyleScope(vnode.elm, i);
+      } else {
+        var ancestor = vnode;
+        while (ancestor) {
+          if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
+            nodeOps.setStyleScope(vnode.elm, i);
+          }
+          ancestor = ancestor.parent;
         }
-        ancestor = ancestor.parent;
+      }
+      // for slot content they should also get the scopeId from the host instance.
+      if (isDef(i = activeInstance) &&
+        i !== vnode.context &&
+        i !== vnode.fnContext &&
+        isDef(i = i.$options._scopeId)
+      ) {
+        nodeOps.setStyleScope(vnode.elm, i);
       }
     }
-    // for slot content they should also get the scopeId from the host instance.
-    if (isDef(i = activeInstance) &&
-      i !== vnode.context &&
-      i !== vnode.fnContext &&
-      isDef(i = i.$options._scopeId)
-    ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
-    }
-  }
 
-  function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+    function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
+      }
     }
-  }
 
-  function invokeDestroyHook (vnode) {
-    var i, j;
-    var data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
-      for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
-    }
-    if (isDef(i = vnode.children)) {
-      for (j = 0; j < vnode.children.length; ++j) {
-        invokeDestroyHook(vnode.children[j]);
+    function invokeDestroyHook (vnode) {
+      var i, j;
+      var data = vnode.data;
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.destroy)) { i(vnode); }
+        for (i = 0; i < cbs.destroy.length; ++i) { cbs.destroy[i](vnode); }
+      }
+      if (isDef(i = vnode.children)) {
+        for (j = 0; j < vnode.children.length; ++j) {
+          invokeDestroyHook(vnode.children[j]);
+        }
       }
     }
-  }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.tag)) {
-          removeAndInvokeRemoveHook(ch);
-          invokeDestroyHook(ch);
-        } else { // Text node
-          removeNode(ch.elm);
+    function removeVnodes (vnodes, startIdx, endIdx) {
+      for (; startIdx <= endIdx; ++startIdx) {
+        var ch = vnodes[startIdx];
+        if (isDef(ch)) {
+          if (isDef(ch.tag)) {
+            removeAndInvokeRemoveHook(ch);
+            invokeDestroyHook(ch);
+          } else { // Text node
+            removeNode(ch.elm);
+          }
         }
       }
     }
-  }
 
-  function removeAndInvokeRemoveHook (vnode, rm) {
-    if (isDef(rm) || isDef(vnode.data)) {
-      var i;
-      var listeners = cbs.remove.length + 1;
-      if (isDef(rm)) {
-        // we have a recursively passed down rm callback
-        // increase the listeners count
-        rm.listeners += listeners;
-      } else {
-        // directly removing
-        rm = createRmCb(vnode.elm, listeners);
-      }
-      // recursively invoke hooks on child component root node
-      if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
-        removeAndInvokeRemoveHook(i, rm);
-      }
-      for (i = 0; i < cbs.remove.length; ++i) {
-        cbs.remove[i](vnode, rm);
-      }
-      if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
-        i(vnode, rm);
+    function removeAndInvokeRemoveHook (vnode, rm) {
+      if (isDef(rm) || isDef(vnode.data)) {
+        var i;
+        var listeners = cbs.remove.length + 1;
+        if (isDef(rm)) {
+          // we have a recursively passed down rm callback
+          // increase the listeners count
+          rm.listeners += listeners;
+        } else {
+          // directly removing
+          rm = createRmCb(vnode.elm, listeners);
+        }
+        // recursively invoke hooks on child component root node
+        if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
+          removeAndInvokeRemoveHook(i, rm);
+        }
+        for (i = 0; i < cbs.remove.length; ++i) {
+          cbs.remove[i](vnode, rm);
+        }
+        if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
+          i(vnode, rm);
+        } else {
+          rm();
+        }
       } else {
-        rm();
+        removeNode(vnode.elm);
       }
-    } else {
-      removeNode(vnode.elm);
     }
-  }
 
-  function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
-    var oldStartIdx = 0;
-    var newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
+    function updateChildren (parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
+      var oldStartIdx = 0;
+      var newStartIdx = 0;
+      var oldEndIdx = oldCh.length - 1;
+      var oldStartVnode = oldCh[0];
+      var oldEndVnode = oldCh[oldEndIdx];
+      var newEndIdx = newCh.length - 1;
+      var newStartVnode = newCh[0];
+      var newEndVnode = newCh[newEndIdx];
+      var oldKeyToIdx, idxInOld, vnodeToMove, refElm;
 
-    // removeOnly is a special flag used only by <transition-group>
-    // to ensure removed elements stay in correct relative positions
-    // during leaving transitions
-    var canMove = !removeOnly;
+      // removeOnly is a special flag used only by <transition-group>
+      // to ensure removed elements stay in correct relative positions
+      // during leaving transitions
+      var canMove = !removeOnly;
 
-    {
-      checkDuplicateKeys(newCh);
-    }
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-        oldEndVnode = oldCh[--oldEndIdx];
-      } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
-        oldStartVnode = oldCh[++oldStartIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-        canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else {
-        if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
-        idxInOld = isDef(newStartVnode.key)
-          ? oldKeyToIdx[newStartVnode.key]
-          : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
-        if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+      {
+        checkDuplicateKeys(newCh);
+      }
+
+      while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
+        if (isUndef(oldStartVnode)) {
+          oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
+        } else if (isUndef(oldEndVnode)) {
+          oldEndVnode = oldCh[--oldEndIdx];
+        } else if (sameVnode(oldStartVnode, newStartVnode)) {
+          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          oldStartVnode = oldCh[++oldStartIdx];
+          newStartVnode = newCh[++newStartIdx];
+        } else if (sameVnode(oldEndVnode, newEndVnode)) {
+          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
+          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
+          oldStartVnode = oldCh[++oldStartIdx];
+          newEndVnode = newCh[--newEndIdx];
+        } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
+          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+          canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
+          oldEndVnode = oldCh[--oldEndIdx];
+          newStartVnode = newCh[++newStartIdx];
         } else {
-          vnodeToMove = oldCh[idxInOld];
-          if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+          if (isUndef(oldKeyToIdx)) { oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx); }
+          idxInOld = isDef(newStartVnode.key)
+            ? oldKeyToIdx[newStartVnode.key]
+            : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
+          if (isUndef(idxInOld)) { // New element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
           } else {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            vnodeToMove = oldCh[idxInOld];
+            if (sameVnode(vnodeToMove, newStartVnode)) {
+              patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
+              oldCh[idxInOld] = undefined;
+              canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
+            } else {
+              // same key but different element. treat as new element
+              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
+            }
           }
+          newStartVnode = newCh[++newStartIdx];
         }
-        newStartVnode = newCh[++newStartIdx];
       }
-    }
-    if (oldStartIdx > oldEndIdx) {
-      refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function checkDuplicateKeys (children) {
-    var seenKeys = {};
-    for (var i = 0; i < children.length; i++) {
-      var vnode = children[i];
-      var key = vnode.key;
-      if (isDef(key)) {
-        if (seenKeys[key]) {
-          warn(
-            ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
-            vnode.context
-          );
-        } else {
-          seenKeys[key] = true;
+      if (oldStartIdx > oldEndIdx) {
+        refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
+        addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
+      } else if (newStartIdx > newEndIdx) {
+        removeVnodes(oldCh, oldStartIdx, oldEndIdx);
+      }
+    }
+
+    function checkDuplicateKeys (children) {
+      var seenKeys = {};
+      for (var i = 0; i < children.length; i++) {
+        var vnode = children[i];
+        var key = vnode.key;
+        if (isDef(key)) {
+          if (seenKeys[key]) {
+            warn(
+              ("Duplicate keys detected: '" + key + "'. This may cause an update error."),
+              vnode.context
+            );
+          } else {
+            seenKeys[key] = true;
+          }
         }
       }
     }
-  }
-
-  function findIdxInOld (node, oldCh, start, end) {
-    for (var i = start; i < end; i++) {
-      var c = oldCh[i];
-      if (isDef(c) && sameVnode(node, c)) { return i }
-    }
-  }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
-    if (oldVnode === vnode) {
-      return
+    function findIdxInOld (node, oldCh, start, end) {
+      for (var i = start; i < end; i++) {
+        var c = oldCh[i];
+        if (isDef(c) && sameVnode(node, c)) { return i }
+      }
     }
 
-    var elm = vnode.elm = oldVnode.elm;
+    function patchVnode (
+      oldVnode,
+      vnode,
+      insertedVnodeQueue,
+      ownerArray,
+      index,
+      removeOnly
+    ) {
+      if (oldVnode === vnode) {
+        return
+      }
 
-    if (isTrue(oldVnode.isAsyncPlaceholder)) {
-      if (isDef(vnode.asyncFactory.resolved)) {
-        hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
-      } else {
-        vnode.isAsyncPlaceholder = true;
+      if (isDef(vnode.elm) && isDef(ownerArray)) {
+        // clone reused vnode
+        vnode = ownerArray[index] = cloneVNode(vnode);
       }
-      return
-    }
 
-    // reuse element for static trees.
-    // note we only do this if the vnode is cloned -
-    // if the new node is not cloned it means the render functions have been
-    // reset by the hot-reload-api and we need to do a proper re-render.
-    if (isTrue(vnode.isStatic) &&
-      isTrue(oldVnode.isStatic) &&
-      vnode.key === oldVnode.key &&
-      (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
-    ) {
-      vnode.componentInstance = oldVnode.componentInstance;
-      return
-    }
+      var elm = vnode.elm = oldVnode.elm;
 
-    var i;
-    var data = vnode.data;
-    if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
-      i(oldVnode, vnode);
-    }
+      if (isTrue(oldVnode.isAsyncPlaceholder)) {
+        if (isDef(vnode.asyncFactory.resolved)) {
+          hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
+        } else {
+          vnode.isAsyncPlaceholder = true;
+        }
+        return
+      }
 
-    var oldCh = oldVnode.children;
-    var ch = vnode.children;
-    if (isDef(data) && isPatchable(vnode)) {
-      for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
-      if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
-    }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
-      } else if (isDef(ch)) {
-        if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      } else if (isDef(oldVnode.text)) {
-        nodeOps.setTextContent(elm, '');
+      // reuse element for static trees.
+      // note we only do this if the vnode is cloned -
+      // if the new node is not cloned it means the render functions have been
+      // reset by the hot-reload-api and we need to do a proper re-render.
+      if (isTrue(vnode.isStatic) &&
+        isTrue(oldVnode.isStatic) &&
+        vnode.key === oldVnode.key &&
+        (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))
+      ) {
+        vnode.componentInstance = oldVnode.componentInstance;
+        return
+      }
+
+      var i;
+      var data = vnode.data;
+      if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
+        i(oldVnode, vnode);
+      }
+
+      var oldCh = oldVnode.children;
+      var ch = vnode.children;
+      if (isDef(data) && isPatchable(vnode)) {
+        for (i = 0; i < cbs.update.length; ++i) { cbs.update[i](oldVnode, vnode); }
+        if (isDef(i = data.hook) && isDef(i = i.update)) { i(oldVnode, vnode); }
+      }
+      if (isUndef(vnode.text)) {
+        if (isDef(oldCh) && isDef(ch)) {
+          if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
+        } else if (isDef(ch)) {
+          {
+            checkDuplicateKeys(ch);
+          }
+          if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
+          addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
+        } else if (isDef(oldCh)) {
+          removeVnodes(oldCh, 0, oldCh.length - 1);
+        } else if (isDef(oldVnode.text)) {
+          nodeOps.setTextContent(elm, '');
+        }
+      } else if (oldVnode.text !== vnode.text) {
+        nodeOps.setTextContent(elm, vnode.text);
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
       }
-    } else if (oldVnode.text !== vnode.text) {
-      nodeOps.setTextContent(elm, vnode.text);
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.postpatch)) { i(oldVnode, vnode); }
     }
-  }
 
-  function invokeInsertHook (vnode, queue, initial) {
-    // delay insert hooks for component root nodes, invoke them after the
-    // element is really inserted
-    if (isTrue(initial) && isDef(vnode.parent)) {
-      vnode.parent.data.pendingInsert = queue;
-    } else {
-      for (var i = 0; i < queue.length; ++i) {
-        queue[i].data.hook.insert(queue[i]);
+    function invokeInsertHook (vnode, queue, initial) {
+      // delay insert hooks for component root nodes, invoke them after the
+      // element is really inserted
+      if (isTrue(initial) && isDef(vnode.parent)) {
+        vnode.parent.data.pendingInsert = queue;
+      } else {
+        for (var i = 0; i < queue.length; ++i) {
+          queue[i].data.hook.insert(queue[i]);
+        }
       }
     }
-  }
 
-  var hydrationBailed = false;
-  // list of modules that can skip create hook during hydration because they
-  // are already rendered on the client or has no need for initialization
-  // Note: style is excluded because it relies on initial clone for future
-  // deep updates (#7063).
-  var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
+    var hydrationBailed = false;
+    // list of modules that can skip create hook during hydration because they
+    // are already rendered on the client or has no need for initialization
+    // Note: style is excluded because it relies on initial clone for future
+    // deep updates (#7063).
+    var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key');
 
-  // Note: this is a browser-only function so we can assume elms are DOM nodes.
-  function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
-    var i;
-    var tag = vnode.tag;
-    var data = vnode.data;
-    var children = vnode.children;
-    inVPre = inVPre || (data && data.pre);
-    vnode.elm = elm;
+    // Note: this is a browser-only function so we can assume elms are DOM nodes.
+    function hydrate (elm, vnode, insertedVnodeQueue, inVPre) {
+      var i;
+      var tag = vnode.tag;
+      var data = vnode.data;
+      var children = vnode.children;
+      inVPre = inVPre || (data && data.pre);
+      vnode.elm = elm;
 
-    if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
-      vnode.isAsyncPlaceholder = true;
-      return true
-    }
-    // assert node match
-    {
-      if (!assertNodeMatch(elm, vnode, inVPre)) {
-        return false
-      }
-    }
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
-      if (isDef(i = vnode.componentInstance)) {
-        // child component. it should have hydrated its own tree.
-        initComponent(vnode, insertedVnodeQueue);
+      if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
+        vnode.isAsyncPlaceholder = true;
         return true
       }
-    }
-    if (isDef(tag)) {
-      if (isDef(children)) {
-        // empty element, allow client to pick up and populate children
-        if (!elm.hasChildNodes()) {
-          createChildren(vnode, children, insertedVnodeQueue);
-        } else {
-          // v-html and domProps: innerHTML
-          if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
-            if (i !== elm.innerHTML) {
-              /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('server innerHTML: ', i);
-                console.warn('client innerHTML: ', elm.innerHTML);
-              }
-              return false
-            }
+      // assert node match
+      {
+        if (!assertNodeMatch(elm, vnode, inVPre)) {
+          return false
+        }
+      }
+      if (isDef(data)) {
+        if (isDef(i = data.hook) && isDef(i = i.init)) { i(vnode, true /* hydrating */); }
+        if (isDef(i = vnode.componentInstance)) {
+          // child component. it should have hydrated its own tree.
+          initComponent(vnode, insertedVnodeQueue);
+          return true
+        }
+      }
+      if (isDef(tag)) {
+        if (isDef(children)) {
+          // empty element, allow client to pick up and populate children
+          if (!elm.hasChildNodes()) {
+            createChildren(vnode, children, insertedVnodeQueue);
           } else {
-            // iterate and compare children lists
-            var childrenMatch = true;
-            var childNode = elm.firstChild;
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
-                childrenMatch = false;
-                break
+            // v-html and domProps: innerHTML
+            if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
+              if (i !== elm.innerHTML) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('server innerHTML: ', i);
+                  console.warn('client innerHTML: ', elm.innerHTML);
+                }
+                return false
               }
-              childNode = childNode.nextSibling;
-            }
-            // if childNode is not null, it means the actual childNodes list is
-            // longer than the virtual children list.
-            if (!childrenMatch || childNode) {
-              /* istanbul ignore if */
-              if ("development" !== 'production' &&
-                typeof console !== 'undefined' &&
-                !hydrationBailed
-              ) {
-                hydrationBailed = true;
-                console.warn('Parent: ', elm);
-                console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+            } else {
+              // iterate and compare children lists
+              var childrenMatch = true;
+              var childNode = elm.firstChild;
+              for (var i$1 = 0; i$1 < children.length; i$1++) {
+                if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
+                  childrenMatch = false;
+                  break
+                }
+                childNode = childNode.nextSibling;
+              }
+              // if childNode is not null, it means the actual childNodes list is
+              // longer than the virtual children list.
+              if (!childrenMatch || childNode) {
+                /* istanbul ignore if */
+                if (typeof console !== 'undefined' &&
+                  !hydrationBailed
+                ) {
+                  hydrationBailed = true;
+                  console.warn('Parent: ', elm);
+                  console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
+                }
+                return false
               }
-              return false
             }
           }
         }
-      }
-      if (isDef(data)) {
-        var fullInvoke = false;
-        for (var key in data) {
-          if (!isRenderedModule(key)) {
-            fullInvoke = true;
-            invokeCreateHooks(vnode, insertedVnodeQueue);
-            break
+        if (isDef(data)) {
+          var fullInvoke = false;
+          for (var key in data) {
+            if (!isRenderedModule(key)) {
+              fullInvoke = true;
+              invokeCreateHooks(vnode, insertedVnodeQueue);
+              break
+            }
+          }
+          if (!fullInvoke && data['class']) {
+            // ensure collecting deps for deep class bindings for future updates
+            traverse(data['class']);
           }
         }
-        if (!fullInvoke && data['class']) {
-          // ensure collecting deps for deep class bindings for future updates
-          traverse(data['class']);
-        }
+      } else if (elm.data !== vnode.text) {
+        elm.data = vnode.text;
       }
-    } else if (elm.data !== vnode.text) {
-      elm.data = vnode.text;
+      return true
     }
-    return true
-  }
 
-  function assertNodeMatch (node, vnode, inVPre) {
-    if (isDef(vnode.tag)) {
-      return vnode.tag.indexOf('vue-component') === 0 || (
-        !isUnknownElement$$1(vnode, inVPre) &&
-        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
-      )
-    } else {
-      return node.nodeType === (vnode.isComment ? 8 : 3)
+    function assertNodeMatch (node, vnode, inVPre) {
+      if (isDef(vnode.tag)) {
+        return vnode.tag.indexOf('vue-component') === 0 || (
+          !isUnknownElement$$1(vnode, inVPre) &&
+          vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
+        )
+      } else {
+        return node.nodeType === (vnode.isComment ? 8 : 3)
+      }
     }
-  }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
-    if (isUndef(vnode)) {
-      if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
-      return
-    }
+    return function patch (oldVnode, vnode, hydrating, removeOnly) {
+      if (isUndef(vnode)) {
+        if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
+        return
+      }
 
-    var isInitialPatch = false;
-    var insertedVnodeQueue = [];
+      var isInitialPatch = false;
+      var insertedVnodeQueue = [];
 
-    if (isUndef(oldVnode)) {
-      // empty mount (likely as component), create new root element
-      isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
-    } else {
-      var isRealElement = isDef(oldVnode.nodeType);
-      if (!isRealElement && sameVnode(oldVnode, vnode)) {
-        // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+      if (isUndef(oldVnode)) {
+        // empty mount (likely as component), create new root element
+        isInitialPatch = true;
+        createElm(vnode, insertedVnodeQueue);
       } else {
-        if (isRealElement) {
-          // mounting to a real element
-          // check if this is server-rendered content and if we can perform
-          // a successful hydration.
-          if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
-            oldVnode.removeAttribute(SSR_ATTR);
-            hydrating = true;
-          }
-          if (isTrue(hydrating)) {
-            if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
-              invokeInsertHook(vnode, insertedVnodeQueue, true);
-              return oldVnode
-            } else {
-              warn(
-                'The client-side rendered virtual DOM tree is not matching ' +
-                'server-rendered content. This is likely caused by incorrect ' +
-                'HTML markup, for example nesting block-level elements inside ' +
-                '<p>, or missing <tbody>. Bailing hydration and performing ' +
-                'full client-side render.'
-              );
+        var isRealElement = isDef(oldVnode.nodeType);
+        if (!isRealElement && sameVnode(oldVnode, vnode)) {
+          // patch existing root node
+          patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
+        } else {
+          if (isRealElement) {
+            // mounting to a real element
+            // check if this is server-rendered content and if we can perform
+            // a successful hydration.
+            if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
+              oldVnode.removeAttribute(SSR_ATTR);
+              hydrating = true;
+            }
+            if (isTrue(hydrating)) {
+              if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
+                invokeInsertHook(vnode, insertedVnodeQueue, true);
+                return oldVnode
+              } else {
+                warn(
+                  'The client-side rendered virtual DOM tree is not matching ' +
+                  'server-rendered content. This is likely caused by incorrect ' +
+                  'HTML markup, for example nesting block-level elements inside ' +
+                  '<p>, or missing <tbody>. Bailing hydration and performing ' +
+                  'full client-side render.'
+                );
+              }
             }
+            // either not server-rendered, or hydration failed.
+            // create an empty node and replace it
+            oldVnode = emptyNodeAt(oldVnode);
           }
-          // either not server-rendered, or hydration failed.
-          // create an empty node and replace it
-          oldVnode = emptyNodeAt(oldVnode);
-        }
 
-        // replacing existing element
-        var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
-
-        // create new node
-        createElm(
-          vnode,
-          insertedVnodeQueue,
-          // extremely rare edge case: do not insert if old element is in a
-          // leaving transition. Only happens when combining transition +
-          // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
-          nodeOps.nextSibling(oldElm)
-        );
+          // replacing existing element
+          var oldElm = oldVnode.elm;
+          var parentElm = nodeOps.parentNode(oldElm);
+
+          // create new node
+          createElm(
+            vnode,
+            insertedVnodeQueue,
+            // extremely rare edge case: do not insert if old element is in a
+            // leaving transition. Only happens when combining transition +
+            // keep-alive + HOCs. (#4590)
+            oldElm._leaveCb ? null : parentElm,
+            nodeOps.nextSibling(oldElm)
+          );
 
-        // update parent placeholder node element, recursively
-        if (isDef(vnode.parent)) {
-          var ancestor = vnode.parent;
-          var patchable = isPatchable(vnode);
-          while (ancestor) {
-            for (var i = 0; i < cbs.destroy.length; ++i) {
-              cbs.destroy[i](ancestor);
-            }
-            ancestor.elm = vnode.elm;
-            if (patchable) {
-              for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
-                cbs.create[i$1](emptyNode, ancestor);
+          // update parent placeholder node element, recursively
+          if (isDef(vnode.parent)) {
+            var ancestor = vnode.parent;
+            var patchable = isPatchable(vnode);
+            while (ancestor) {
+              for (var i = 0; i < cbs.destroy.length; ++i) {
+                cbs.destroy[i](ancestor);
               }
-              // #6513
-              // invoke insert hooks that may have been merged by create hooks.
-              // e.g. for directives that uses the "inserted" hook.
-              var insert = ancestor.data.hook.insert;
-              if (insert.merged) {
-                // start at index 1 to avoid re-invoking component mounted hook
-                for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
-                  insert.fns[i$2]();
+              ancestor.elm = vnode.elm;
+              if (patchable) {
+                for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
+                  cbs.create[i$1](emptyNode, ancestor);
+                }
+                // #6513
+                // invoke insert hooks that may have been merged by create hooks.
+                // e.g. for directives that uses the "inserted" hook.
+                var insert = ancestor.data.hook.insert;
+                if (insert.merged) {
+                  // start at index 1 to avoid re-invoking component mounted hook
+                  for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
+                    insert.fns[i$2]();
+                  }
                 }
+              } else {
+                registerRef(ancestor);
               }
-            } else {
-              registerRef(ancestor);
+              ancestor = ancestor.parent;
             }
-            ancestor = ancestor.parent;
           }
-        }
 
-        // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
-        } else if (isDef(oldVnode.tag)) {
-          invokeDestroyHook(oldVnode);
+          // destroy old node
+          if (isDef(parentElm)) {
+            removeVnodes([oldVnode], 0, 0);
+          } else if (isDef(oldVnode.tag)) {
+            invokeDestroyHook(oldVnode);
+          }
         }
       }
-    }
 
-    invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
-    return vnode.elm
+      invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
+      return vnode.elm
+    }
   }
-}
 
-/*  */
+  /*  */
 
-var directives = {
-  create: updateDirectives,
-  update: updateDirectives,
-  destroy: function unbindDirectives (vnode) {
-    updateDirectives(vnode, emptyNode);
-  }
-};
+  var directives = {
+    create: updateDirectives,
+    update: updateDirectives,
+    destroy: function unbindDirectives (vnode) {
+      updateDirectives(vnode, emptyNode);
+    }
+  };
 
-function updateDirectives (oldVnode, vnode) {
-  if (oldVnode.data.directives || vnode.data.directives) {
-    _update(oldVnode, vnode);
+  function updateDirectives (oldVnode, vnode) {
+    if (oldVnode.data.directives || vnode.data.directives) {
+      _update(oldVnode, vnode);
+    }
   }
-}
 
-function _update (oldVnode, vnode) {
-  var isCreate = oldVnode === emptyNode;
-  var isDestroy = vnode === emptyNode;
-  var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
-  var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
+  function _update (oldVnode, vnode) {
+    var isCreate = oldVnode === emptyNode;
+    var isDestroy = vnode === emptyNode;
+    var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
+    var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
 
-  var dirsWithInsert = [];
-  var dirsWithPostpatch = [];
+    var dirsWithInsert = [];
+    var dirsWithPostpatch = [];
 
-  var key, oldDir, dir;
-  for (key in newDirs) {
-    oldDir = oldDirs[key];
-    dir = newDirs[key];
-    if (!oldDir) {
-      // new directive, bind
-      callHook$1(dir, 'bind', vnode, oldVnode);
-      if (dir.def && dir.def.inserted) {
-        dirsWithInsert.push(dir);
-      }
-    } else {
-      // existing directive, update
-      dir.oldValue = oldDir.value;
-      callHook$1(dir, 'update', vnode, oldVnode);
-      if (dir.def && dir.def.componentUpdated) {
-        dirsWithPostpatch.push(dir);
+    var key, oldDir, dir;
+    for (key in newDirs) {
+      oldDir = oldDirs[key];
+      dir = newDirs[key];
+      if (!oldDir) {
+        // new directive, bind
+        callHook$1(dir, 'bind', vnode, oldVnode);
+        if (dir.def && dir.def.inserted) {
+          dirsWithInsert.push(dir);
+        }
+      } else {
+        // existing directive, update
+        dir.oldValue = oldDir.value;
+        dir.oldArg = oldDir.arg;
+        callHook$1(dir, 'update', vnode, oldVnode);
+        if (dir.def && dir.def.componentUpdated) {
+          dirsWithPostpatch.push(dir);
+        }
       }
     }
-  }
 
-  if (dirsWithInsert.length) {
-    var callInsert = function () {
-      for (var i = 0; i < dirsWithInsert.length; i++) {
-        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+    if (dirsWithInsert.length) {
+      var callInsert = function () {
+        for (var i = 0; i < dirsWithInsert.length; i++) {
+          callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+        }
+      };
+      if (isCreate) {
+        mergeVNodeHook(vnode, 'insert', callInsert);
+      } else {
+        callInsert();
       }
-    };
-    if (isCreate) {
-      mergeVNodeHook(vnode, 'insert', callInsert);
-    } else {
-      callInsert();
     }
-  }
 
-  if (dirsWithPostpatch.length) {
-    mergeVNodeHook(vnode, 'postpatch', function () {
-      for (var i = 0; i < dirsWithPostpatch.length; i++) {
-        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
-      }
-    });
-  }
+    if (dirsWithPostpatch.length) {
+      mergeVNodeHook(vnode, 'postpatch', function () {
+        for (var i = 0; i < dirsWithPostpatch.length; i++) {
+          callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+        }
+      });
+    }
 
-  if (!isCreate) {
-    for (key in oldDirs) {
-      if (!newDirs[key]) {
-        // no longer present, unbind
-        callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+    if (!isCreate) {
+      for (key in oldDirs) {
+        if (!newDirs[key]) {
+          // no longer present, unbind
+          callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
+        }
       }
     }
   }
-}
 
-var emptyModifiers = Object.create(null);
+  var emptyModifiers = Object.create(null);
 
-function normalizeDirectives$1 (
-  dirs,
-  vm
-) {
-  var res = Object.create(null);
-  if (!dirs) {
-    // $flow-disable-line
-    return res
-  }
-  var i, dir;
-  for (i = 0; i < dirs.length; i++) {
-    dir = dirs[i];
-    if (!dir.modifiers) {
+  function normalizeDirectives$1 (
+    dirs,
+    vm
+  ) {
+    var res = Object.create(null);
+    if (!dirs) {
       // $flow-disable-line
-      dir.modifiers = emptyModifiers;
+      return res
     }
-    res[getRawDirName(dir)] = dir;
-    dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+    var i, dir;
+    for (i = 0; i < dirs.length; i++) {
+      dir = dirs[i];
+      if (!dir.modifiers) {
+        // $flow-disable-line
+        dir.modifiers = emptyModifiers;
+      }
+      res[getRawDirName(dir)] = dir;
+      dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
+    }
+    // $flow-disable-line
+    return res
   }
-  // $flow-disable-line
-  return res
-}
 
-function getRawDirName (dir) {
-  return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
-}
+  function getRawDirName (dir) {
+    return dir.rawName || ((dir.name) + "." + (Object.keys(dir.modifiers || {}).join('.')))
+  }
 
-function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
-  var fn = dir.def && dir.def[hook];
-  if (fn) {
-    try {
-      fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
-    } catch (e) {
-      handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+  function callHook$1 (dir, hook, vnode, oldVnode, isDestroy) {
+    var fn = dir.def && dir.def[hook];
+    if (fn) {
+      try {
+        fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
+      } catch (e) {
+        handleError(e, vnode.context, ("directive " + (dir.name) + " " + hook + " hook"));
+      }
     }
   }
-}
 
-var baseModules = [
-  ref,
-  directives
-];
+  var baseModules = [
+    ref,
+    directives
+  ];
 
-/*  */
+  /*  */
 
-function updateAttrs (oldVnode, vnode) {
-  var opts = vnode.componentOptions;
-  if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
-    return
-  }
-  if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
-    return
-  }
-  var key, cur, old;
-  var elm = vnode.elm;
-  var oldAttrs = oldVnode.data.attrs || {};
-  var attrs = vnode.data.attrs || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(attrs.__ob__)) {
-    attrs = vnode.data.attrs = extend({}, attrs);
-  }
+  function updateAttrs (oldVnode, vnode) {
+    var opts = vnode.componentOptions;
+    if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
+      return
+    }
+    if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
+      return
+    }
+    var key, cur, old;
+    var elm = vnode.elm;
+    var oldAttrs = oldVnode.data.attrs || {};
+    var attrs = vnode.data.attrs || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(attrs.__ob__)) {
+      attrs = vnode.data.attrs = extend({}, attrs);
+    }
 
-  for (key in attrs) {
-    cur = attrs[key];
-    old = oldAttrs[key];
-    if (old !== cur) {
-      setAttr(elm, key, cur);
+    for (key in attrs) {
+      cur = attrs[key];
+      old = oldAttrs[key];
+      if (old !== cur) {
+        setAttr(elm, key, cur, vnode.data.pre);
+      }
     }
-  }
-  // #4391: in IE9, setting type can reset value for input[type=radio]
-  // #6666: IE/Edge forces progress value down to 1 before setting a max
-  /* istanbul ignore if */
-  if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
-    setAttr(elm, 'value', attrs.value);
-  }
-  for (key in oldAttrs) {
-    if (isUndef(attrs[key])) {
-      if (isXlink(key)) {
-        elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
-      } else if (!isEnumeratedAttr(key)) {
-        elm.removeAttribute(key);
+    // #4391: in IE9, setting type can reset value for input[type=radio]
+    // #6666: IE/Edge forces progress value down to 1 before setting a max
+    /* istanbul ignore if */
+    if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
+      setAttr(elm, 'value', attrs.value);
+    }
+    for (key in oldAttrs) {
+      if (isUndef(attrs[key])) {
+        if (isXlink(key)) {
+          elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
+        } else if (!isEnumeratedAttr(key)) {
+          elm.removeAttribute(key);
+        }
       }
     }
   }
-}
 
-function setAttr (el, key, value) {
-  if (isBooleanAttr(key)) {
-    // set attribute for blank value
-    // e.g. <option disabled>Select one</option>
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key);
-    } else {
-      // technically allowfullscreen is a boolean attribute for <iframe>,
-      // but Flash expects a value of "true" when used on <embed> tag
-      value = key === 'allowfullscreen' && el.tagName === 'EMBED'
-        ? 'true'
-        : key;
-      el.setAttribute(key, value);
-    }
-  } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true');
-  } else if (isXlink(key)) {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+  function setAttr (el, key, value, isInPre) {
+    if (isInPre || el.tagName.indexOf('-') > -1) {
+      baseSetAttr(el, key, value);
+    } else if (isBooleanAttr(key)) {
+      // set attribute for blank value
+      // e.g. <option disabled>Select one</option>
+      if (isFalsyAttrValue(value)) {
+        el.removeAttribute(key);
+      } else {
+        // technically allowfullscreen is a boolean attribute for <iframe>,
+        // but Flash expects a value of "true" when used on <embed> tag
+        value = key === 'allowfullscreen' && el.tagName === 'EMBED'
+          ? 'true'
+          : key;
+        el.setAttribute(key, value);
+      }
+    } else if (isEnumeratedAttr(key)) {
+      el.setAttribute(key, convertEnumeratedValue(key, value));
+    } else if (isXlink(key)) {
+      if (isFalsyAttrValue(value)) {
+        el.removeAttributeNS(xlinkNS, getXlinkProp(key));
+      } else {
+        el.setAttributeNS(xlinkNS, key, value);
+      }
     } else {
-      el.setAttributeNS(xlinkNS, key, value);
+      baseSetAttr(el, key, value);
     }
-  } else {
+  }
+
+  function baseSetAttr (el, key, value) {
     if (isFalsyAttrValue(value)) {
       el.removeAttribute(key);
     } else {
@@ -6265,7 +6798,7 @@ function setAttr (el, key, value) {
       if (
         isIE && !isIE9 &&
         el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
+        key === 'placeholder' && value !== '' && !el.__ieph
       ) {
         var blocker = function (e) {
           e.stopImmediatePropagation();
@@ -6275,1636 +6808,1666 @@ function setAttr (el, key, value) {
         // $flow-disable-line
         el.__ieph = true; /* IE placeholder patched */
       }
-      el.setAttribute(key, value);
+      el.setAttribute(key, value);
+    }
+  }
+
+  var attrs = {
+    create: updateAttrs,
+    update: updateAttrs
+  };
+
+  /*  */
+
+  function updateClass (oldVnode, vnode) {
+    var el = vnode.elm;
+    var data = vnode.data;
+    var oldData = oldVnode.data;
+    if (
+      isUndef(data.staticClass) &&
+      isUndef(data.class) && (
+        isUndef(oldData) || (
+          isUndef(oldData.staticClass) &&
+          isUndef(oldData.class)
+        )
+      )
+    ) {
+      return
+    }
+
+    var cls = genClassForVnode(vnode);
+
+    // handle transition classes
+    var transitionClass = el._transitionClasses;
+    if (isDef(transitionClass)) {
+      cls = concat(cls, stringifyClass(transitionClass));
+    }
+
+    // set the class
+    if (cls !== el._prevClass) {
+      el.setAttribute('class', cls);
+      el._prevClass = cls;
+    }
+  }
+
+  var klass = {
+    create: updateClass,
+    update: updateClass
+  };
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  /*  */
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+  var CHECKBOX_RADIO_TOKEN = '__c';
+
+  /*  */
+
+  // normalize v-model event tokens that can only be determined at runtime.
+  // it's important to place the event as the first in the array because
+  // the whole point is ensuring the v-model callback gets called before
+  // user-attached handlers.
+  function normalizeEvents (on) {
+    /* istanbul ignore if */
+    if (isDef(on[RANGE_TOKEN])) {
+      // IE input[type=range] only supports `change` event
+      var event = isIE ? 'change' : 'input';
+      on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
+      delete on[RANGE_TOKEN];
+    }
+    // This was originally intended to fix #4521 but no longer necessary
+    // after 2.5. Keeping it for backwards compat with generated code from < 2.4
+    /* istanbul ignore if */
+    if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
+      on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
+      delete on[CHECKBOX_RADIO_TOKEN];
+    }
+  }
+
+  var target$1;
+
+  function createOnceHandler$1 (event, handler, capture) {
+    var _target = target$1; // save current target element in closure
+    return function onceHandler () {
+      var res = handler.apply(null, arguments);
+      if (res !== null) {
+        remove$2(event, onceHandler, capture, _target);
+      }
+    }
+  }
+
+  // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+  // implementation and does not fire microtasks in between event propagation, so
+  // safe to exclude.
+  var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);
+
+  function add$1 (
+    name,
+    handler,
+    capture,
+    passive
+  ) {
+    // async edge case #6566: inner click event triggers patch, event handler
+    // attached to outer element during patch, and triggered again. This
+    // happens because browsers fire microtask ticks between event propagation.
+    // the solution is simple: we save the timestamp when a handler is attached,
+    // and the handler would only fire if the event passed to it was fired
+    // AFTER it was attached.
+    if (useMicrotaskFix) {
+      var attachedTimestamp = currentFlushTimestamp;
+      var original = handler;
+      handler = original._wrapper = function (e) {
+        if (
+          // no bubbling, should always fire.
+          // this is just a safety net in case event.timeStamp is unreliable in
+          // certain weird environments...
+          e.target === e.currentTarget ||
+          // event is fired after handler attachment
+          e.timeStamp >= attachedTimestamp ||
+          // bail for environments that have buggy event.timeStamp implementations
+          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+          // #9681 QtWebEngine event.timeStamp is negative value
+          e.timeStamp <= 0 ||
+          // #9448 bail if event is fired in another document in a multi-page
+          // electron/nw.js app, since event.timeStamp will be using a different
+          // starting reference
+          e.target.ownerDocument !== document
+        ) {
+          return original.apply(this, arguments)
+        }
+      };
+    }
+    target$1.addEventListener(
+      name,
+      handler,
+      supportsPassive
+        ? { capture: capture, passive: passive }
+        : capture
+    );
+  }
+
+  function remove$2 (
+    name,
+    handler,
+    capture,
+    _target
+  ) {
+    (_target || target$1).removeEventListener(
+      name,
+      handler._wrapper || handler,
+      capture
+    );
+  }
+
+  function updateDOMListeners (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
+      return
+    }
+    var on = vnode.data.on || {};
+    var oldOn = oldVnode.data.on || {};
+    target$1 = vnode.elm;
+    normalizeEvents(on);
+    updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
+    target$1 = undefined;
+  }
+
+  var events = {
+    create: updateDOMListeners,
+    update: updateDOMListeners
+  };
+
+  /*  */
+
+  var svgContainer;
+
+  function updateDOMProps (oldVnode, vnode) {
+    if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
+      return
+    }
+    var key, cur;
+    var elm = vnode.elm;
+    var oldProps = oldVnode.data.domProps || {};
+    var props = vnode.data.domProps || {};
+    // clone observed objects, as the user probably wants to mutate it
+    if (isDef(props.__ob__)) {
+      props = vnode.data.domProps = extend({}, props);
+    }
+
+    for (key in oldProps) {
+      if (!(key in props)) {
+        elm[key] = '';
+      }
+    }
+
+    for (key in props) {
+      cur = props[key];
+      // ignore children if the node has textContent or innerHTML,
+      // as these will throw away existing DOM nodes and cause removal errors
+      // on subsequent patches (#3360)
+      if (key === 'textContent' || key === 'innerHTML') {
+        if (vnode.children) { vnode.children.length = 0; }
+        if (cur === oldProps[key]) { continue }
+        // #6601 work around Chrome version <= 55 bug where single textNode
+        // replaced by innerHTML/textContent retains its parentNode property
+        if (elm.childNodes.length === 1) {
+          elm.removeChild(elm.childNodes[0]);
+        }
+      }
+
+      if (key === 'value' && elm.tagName !== 'PROGRESS') {
+        // store value as _value as well since
+        // non-string values will be stringified
+        elm._value = cur;
+        // avoid resetting cursor position when value is the same
+        var strCur = isUndef(cur) ? '' : String(cur);
+        if (shouldUpdateValue(elm, strCur)) {
+          elm.value = strCur;
+        }
+      } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+        // IE doesn't support innerHTML for SVG elements
+        svgContainer = svgContainer || document.createElement('div');
+        svgContainer.innerHTML = "<svg>" + cur + "</svg>";
+        var svg = svgContainer.firstChild;
+        while (elm.firstChild) {
+          elm.removeChild(elm.firstChild);
+        }
+        while (svg.firstChild) {
+          elm.appendChild(svg.firstChild);
+        }
+      } else if (
+        // skip the update if old and new VDOM state is the same.
+        // `value` is handled separately because the DOM value may be temporarily
+        // out of sync with VDOM state due to focus, composition and modifiers.
+        // This  #4521 by skipping the unnecessary `checked` update.
+        cur !== oldProps[key]
+      ) {
+        // some property updates can throw
+        // e.g. `value` on <progress> w/ non-finite value
+        try {
+          elm[key] = cur;
+        } catch (e) {}
+      }
     }
   }
-}
 
-var attrs = {
-  create: updateAttrs,
-  update: updateAttrs
-};
+  // check platforms/web/util/attrs.js acceptValue
 
-/*  */
 
-function updateClass (oldVnode, vnode) {
-  var el = vnode.elm;
-  var data = vnode.data;
-  var oldData = oldVnode.data;
-  if (
-    isUndef(data.staticClass) &&
-    isUndef(data.class) && (
-      isUndef(oldData) || (
-        isUndef(oldData.staticClass) &&
-        isUndef(oldData.class)
-      )
-    )
-  ) {
-    return
+  function shouldUpdateValue (elm, checkVal) {
+    return (!elm.composing && (
+      elm.tagName === 'OPTION' ||
+      isNotInFocusAndDirty(elm, checkVal) ||
+      isDirtyWithModifiers(elm, checkVal)
+    ))
   }
 
-  var cls = genClassForVnode(vnode);
-
-  // handle transition classes
-  var transitionClass = el._transitionClasses;
-  if (isDef(transitionClass)) {
-    cls = concat(cls, stringifyClass(transitionClass));
+  function isNotInFocusAndDirty (elm, checkVal) {
+    // return true when textbox (.number and .trim) loses focus and its value is
+    // not equal to the updated value
+    var notInFocus = true;
+    // #6157
+    // work around IE bug when accessing document.activeElement in an iframe
+    try { notInFocus = document.activeElement !== elm; } catch (e) {}
+    return notInFocus && elm.value !== checkVal
   }
 
-  // set the class
-  if (cls !== el._prevClass) {
-    el.setAttribute('class', cls);
-    el._prevClass = cls;
+  function isDirtyWithModifiers (elm, newVal) {
+    var value = elm.value;
+    var modifiers = elm._vModifiers; // injected by v-model runtime
+    if (isDef(modifiers)) {
+      if (modifiers.number) {
+        return toNumber(value) !== toNumber(newVal)
+      }
+      if (modifiers.trim) {
+        return value.trim() !== newVal.trim()
+      }
+    }
+    return value !== newVal
   }
-}
 
-var klass = {
-  create: updateClass,
-  update: updateClass
-};
-
-/*  */
-
-/*  */
+  var domProps = {
+    create: updateDOMProps,
+    update: updateDOMProps
+  };
 
+  /*  */
 
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+      }
+    });
+    return res
+  });
 
+  // merge static and dynamic style data on the same vnode
+  function normalizeStyleData (data) {
+    var style = normalizeStyleBinding(data.style);
+    // static style is pre-processed into an object during compilation
+    // and is always a fresh object, so it's safe to merge into it
+    return data.staticStyle
+      ? extend(data.staticStyle, style)
+      : style
+  }
 
+  // normalize possible array / string values into Object
+  function normalizeStyleBinding (bindingStyle) {
+    if (Array.isArray(bindingStyle)) {
+      return toObject(bindingStyle)
+    }
+    if (typeof bindingStyle === 'string') {
+      return parseStyleText(bindingStyle)
+    }
+    return bindingStyle
+  }
 
+  /**
+   * parent component style should be after child's
+   * so that parent component's style could override it
+   */
+  function getStyle (vnode, checkChild) {
+    var res = {};
+    var styleData;
 
+    if (checkChild) {
+      var childNode = vnode;
+      while (childNode.componentInstance) {
+        childNode = childNode.componentInstance._vnode;
+        if (
+          childNode && childNode.data &&
+          (styleData = normalizeStyleData(childNode.data))
+        ) {
+          extend(res, styleData);
+        }
+      }
+    }
 
+    if ((styleData = normalizeStyleData(vnode.data))) {
+      extend(res, styleData);
+    }
 
+    var parentNode = vnode;
+    while ((parentNode = parentNode.parent)) {
+      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+        extend(res, styleData);
+      }
+    }
+    return res
+  }
 
-// add a raw attr (use this in preTransforms)
+  /*  */
 
+  var cssVarRE = /^--/;
+  var importantRE = /\s*!important$/;
+  var setProp = function (el, name, val) {
+    /* istanbul ignore if */
+    if (cssVarRE.test(name)) {
+      el.style.setProperty(name, val);
+    } else if (importantRE.test(val)) {
+      el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
+    } else {
+      var normalizedName = normalize(name);
+      if (Array.isArray(val)) {
+        // Support values array created by autoprefixer, e.g.
+        // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
+        // Set them one by one, and the browser will only set those it can recognize
+        for (var i = 0, len = val.length; i < len; i++) {
+          el.style[normalizedName] = val[i];
+        }
+      } else {
+        el.style[normalizedName] = val;
+      }
+    }
+  };
 
+  var vendorNames = ['Webkit', 'Moz', 'ms'];
 
+  var emptyStyle;
+  var normalize = cached(function (prop) {
+    emptyStyle = emptyStyle || document.createElement('div').style;
+    prop = camelize(prop);
+    if (prop !== 'filter' && (prop in emptyStyle)) {
+      return prop
+    }
+    var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
+    for (var i = 0; i < vendorNames.length; i++) {
+      var name = vendorNames[i] + capName;
+      if (name in emptyStyle) {
+        return name
+      }
+    }
+  });
 
+  function updateStyle (oldVnode, vnode) {
+    var data = vnode.data;
+    var oldData = oldVnode.data;
 
+    if (isUndef(data.staticStyle) && isUndef(data.style) &&
+      isUndef(oldData.staticStyle) && isUndef(oldData.style)
+    ) {
+      return
+    }
 
+    var cur, name;
+    var el = vnode.elm;
+    var oldStaticStyle = oldData.staticStyle;
+    var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
 
+    // if static style exists, stylebinding already merged into it when doing normalizeStyleData
+    var oldStyle = oldStaticStyle || oldStyleBinding;
 
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
+    var style = normalizeStyleBinding(vnode.data.style) || {};
 
-/*  */
+    // store normalized style under a different key for next diff
+    // make sure to clone it if it's reactive, since the user likely wants
+    // to mutate it.
+    vnode.data.normalizedStyle = isDef(style.__ob__)
+      ? extend({}, style)
+      : style;
 
-/**
- * Cross-platform code generation for component v-model
- */
+    var newStyle = getStyle(vnode, true);
 
+    for (name in oldStyle) {
+      if (isUndef(newStyle[name])) {
+        setProp(el, name, '');
+      }
+    }
+    for (name in newStyle) {
+      cur = newStyle[name];
+      if (cur !== oldStyle[name]) {
+        // ie9 setting to null has no effect, must use empty string
+        setProp(el, name, cur == null ? '' : cur);
+      }
+    }
+  }
 
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
+  var style = {
+    create: updateStyle,
+    update: updateStyle
+  };
 
-/*  */
+  /*  */
 
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
-var CHECKBOX_RADIO_TOKEN = '__c';
+  var whitespaceRE = /\s+/;
 
-/*  */
+  /**
+   * Add class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function addClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
+    }
 
-// normalize v-model event tokens that can only be determined at runtime.
-// it's important to place the event as the first in the array because
-// the whole point is ensuring the v-model callback gets called before
-// user-attached handlers.
-function normalizeEvents (on) {
-  /* istanbul ignore if */
-  if (isDef(on[RANGE_TOKEN])) {
-    // IE input[type=range] only supports `change` event
-    var event = isIE ? 'change' : 'input';
-    on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
-    delete on[RANGE_TOKEN];
-  }
-  // This was originally intended to fix #4521 but no longer necessary
-  // after 2.5. Keeping it for backwards compat with generated code from < 2.4
-  /* istanbul ignore if */
-  if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
-    on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
-    delete on[CHECKBOX_RADIO_TOKEN];
-  }
-}
-
-var target$1;
-
-function createOnceHandler (handler, event, capture) {
-  var _target = target$1; // save current target element in closure
-  return function onceHandler () {
-    var res = handler.apply(null, arguments);
-    if (res !== null) {
-      remove$2(event, onceHandler, capture, _target);
-    }
-  }
-}
-
-function add$1 (
-  event,
-  handler,
-  once$$1,
-  capture,
-  passive
-) {
-  handler = withMacroTask(handler);
-  if (once$$1) { handler = createOnceHandler(handler, event, capture); }
-  target$1.addEventListener(
-    event,
-    handler,
-    supportsPassive
-      ? { capture: capture, passive: passive }
-      : capture
-  );
-}
-
-function remove$2 (
-  event,
-  handler,
-  capture,
-  _target
-) {
-  (_target || target$1).removeEventListener(
-    event,
-    handler._withTask || handler,
-    capture
-  );
-}
-
-function updateDOMListeners (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
-    return
-  }
-  var on = vnode.data.on || {};
-  var oldOn = oldVnode.data.on || {};
-  target$1 = vnode.elm;
-  normalizeEvents(on);
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
-  target$1 = undefined;
-}
-
-var events = {
-  create: updateDOMListeners,
-  update: updateDOMListeners
-};
-
-/*  */
-
-function updateDOMProps (oldVnode, vnode) {
-  if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
-    return
-  }
-  var key, cur;
-  var elm = vnode.elm;
-  var oldProps = oldVnode.data.domProps || {};
-  var props = vnode.data.domProps || {};
-  // clone observed objects, as the user probably wants to mutate it
-  if (isDef(props.__ob__)) {
-    props = vnode.data.domProps = extend({}, props);
-  }
-
-  for (key in oldProps) {
-    if (isUndef(props[key])) {
-      elm[key] = '';
-    }
-  }
-  for (key in props) {
-    cur = props[key];
-    // ignore children if the node has textContent or innerHTML,
-    // as these will throw away existing DOM nodes and cause removal errors
-    // on subsequent patches (#3360)
-    if (key === 'textContent' || key === 'innerHTML') {
-      if (vnode.children) { vnode.children.length = 0; }
-      if (cur === oldProps[key]) { continue }
-      // #6601 work around Chrome version <= 55 bug where single textNode
-      // replaced by innerHTML/textContent retains its parentNode property
-      if (elm.childNodes.length === 1) {
-        elm.removeChild(elm.childNodes[0]);
-      }
-    }
-
-    if (key === 'value') {
-      // store value as _value as well since
-      // non-string values will be stringified
-      elm._value = cur;
-      // avoid resetting cursor position when value is the same
-      var strCur = isUndef(cur) ? '' : String(cur);
-      if (shouldUpdateValue(elm, strCur)) {
-        elm.value = strCur;
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.add(c); });
+      } else {
+        el.classList.add(cls);
       }
     } else {
-      elm[key] = cur;
-    }
-  }
-}
-
-// check platforms/web/util/attrs.js acceptValue
-
-
-function shouldUpdateValue (elm, checkVal) {
-  return (!elm.composing && (
-    elm.tagName === 'OPTION' ||
-    isNotInFocusAndDirty(elm, checkVal) ||
-    isDirtyWithModifiers(elm, checkVal)
-  ))
-}
-
-function isNotInFocusAndDirty (elm, checkVal) {
-  // return true when textbox (.number and .trim) loses focus and its value is
-  // not equal to the updated value
-  var notInFocus = true;
-  // #6157
-  // work around IE bug when accessing document.activeElement in an iframe
-  try { notInFocus = document.activeElement !== elm; } catch (e) {}
-  return notInFocus && elm.value !== checkVal
-}
-
-function isDirtyWithModifiers (elm, newVal) {
-  var value = elm.value;
-  var modifiers = elm._vModifiers; // injected by v-model runtime
-  if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
-    if (modifiers.number) {
-      return toNumber(value) !== toNumber(newVal)
-    }
-    if (modifiers.trim) {
-      return value.trim() !== newVal.trim()
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      if (cur.indexOf(' ' + cls + ' ') < 0) {
+        el.setAttribute('class', (cur + cls).trim());
+      }
     }
   }
-  return value !== newVal
-}
-
-var domProps = {
-  create: updateDOMProps,
-  update: updateDOMProps
-};
-
-/*  */
 
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+  /**
+   * Remove class with compatibility for SVG since classList is not supported on
+   * SVG elements in IE
+   */
+  function removeClass (el, cls) {
+    /* istanbul ignore if */
+    if (!cls || !(cls = cls.trim())) {
+      return
     }
-  });
-  return res
-});
-
-// merge static and dynamic style data on the same vnode
-function normalizeStyleData (data) {
-  var style = normalizeStyleBinding(data.style);
-  // static style is pre-processed into an object during compilation
-  // and is always a fresh object, so it's safe to merge into it
-  return data.staticStyle
-    ? extend(data.staticStyle, style)
-    : style
-}
-
-// normalize possible array / string values into Object
-function normalizeStyleBinding (bindingStyle) {
-  if (Array.isArray(bindingStyle)) {
-    return toObject(bindingStyle)
-  }
-  if (typeof bindingStyle === 'string') {
-    return parseStyleText(bindingStyle)
-  }
-  return bindingStyle
-}
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-function getStyle (vnode, checkChild) {
-  var res = {};
-  var styleData;
 
-  if (checkChild) {
-    var childNode = vnode;
-    while (childNode.componentInstance) {
-      childNode = childNode.componentInstance._vnode;
-      if (
-        childNode && childNode.data &&
-        (styleData = normalizeStyleData(childNode.data))
-      ) {
-        extend(res, styleData);
+    /* istanbul ignore else */
+    if (el.classList) {
+      if (cls.indexOf(' ') > -1) {
+        cls.split(whitespaceRE).forEach(function (c) { return el.classList.remove(c); });
+      } else {
+        el.classList.remove(cls);
+      }
+      if (!el.classList.length) {
+        el.removeAttribute('class');
+      }
+    } else {
+      var cur = " " + (el.getAttribute('class') || '') + " ";
+      var tar = ' ' + cls + ' ';
+      while (cur.indexOf(tar) >= 0) {
+        cur = cur.replace(tar, ' ');
+      }
+      cur = cur.trim();
+      if (cur) {
+        el.setAttribute('class', cur);
+      } else {
+        el.removeAttribute('class');
       }
     }
   }
 
-  if ((styleData = normalizeStyleData(vnode.data))) {
-    extend(res, styleData);
-  }
+  /*  */
 
-  var parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
+  function resolveTransition (def$$1) {
+    if (!def$$1) {
+      return
+    }
+    /* istanbul ignore else */
+    if (typeof def$$1 === 'object') {
+      var res = {};
+      if (def$$1.css !== false) {
+        extend(res, autoCssTransition(def$$1.name || 'v'));
+      }
+      extend(res, def$$1);
+      return res
+    } else if (typeof def$$1 === 'string') {
+      return autoCssTransition(def$$1)
     }
   }
-  return res
-}
 
-/*  */
+  var autoCssTransition = cached(function (name) {
+    return {
+      enterClass: (name + "-enter"),
+      enterToClass: (name + "-enter-to"),
+      enterActiveClass: (name + "-enter-active"),
+      leaveClass: (name + "-leave"),
+      leaveToClass: (name + "-leave-to"),
+      leaveActiveClass: (name + "-leave-active")
+    }
+  });
 
-var cssVarRE = /^--/;
-var importantRE = /\s*!important$/;
-var setProp = function (el, name, val) {
-  /* istanbul ignore if */
-  if (cssVarRE.test(name)) {
-    el.style.setProperty(name, val);
-  } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important');
-  } else {
-    var normalizedName = normalize(name);
-    if (Array.isArray(val)) {
-      // Support values array created by autoprefixer, e.g.
-      // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
-      // Set them one by one, and the browser will only set those it can recognize
-      for (var i = 0, len = val.length; i < len; i++) {
-        el.style[normalizedName] = val[i];
-      }
-    } else {
-      el.style[normalizedName] = val;
+  var hasTransition = inBrowser && !isIE9;
+  var TRANSITION = 'transition';
+  var ANIMATION = 'animation';
+
+  // Transition property/event sniffing
+  var transitionProp = 'transition';
+  var transitionEndEvent = 'transitionend';
+  var animationProp = 'animation';
+  var animationEndEvent = 'animationend';
+  if (hasTransition) {
+    /* istanbul ignore if */
+    if (window.ontransitionend === undefined &&
+      window.onwebkittransitionend !== undefined
+    ) {
+      transitionProp = 'WebkitTransition';
+      transitionEndEvent = 'webkitTransitionEnd';
+    }
+    if (window.onanimationend === undefined &&
+      window.onwebkitanimationend !== undefined
+    ) {
+      animationProp = 'WebkitAnimation';
+      animationEndEvent = 'webkitAnimationEnd';
     }
   }
-};
 
-var vendorNames = ['Webkit', 'Moz', 'ms'];
+  // binding to window is necessary to make hot reload work in IE in strict mode
+  var raf = inBrowser
+    ? window.requestAnimationFrame
+      ? window.requestAnimationFrame.bind(window)
+      : setTimeout
+    : /* istanbul ignore next */ function (fn) { return fn(); };
 
-var emptyStyle;
-var normalize = cached(function (prop) {
-  emptyStyle = emptyStyle || document.createElement('div').style;
-  prop = camelize(prop);
-  if (prop !== 'filter' && (prop in emptyStyle)) {
-    return prop
+  function nextFrame (fn) {
+    raf(function () {
+      raf(fn);
+    });
   }
-  var capName = prop.charAt(0).toUpperCase() + prop.slice(1);
-  for (var i = 0; i < vendorNames.length; i++) {
-    var name = vendorNames[i] + capName;
-    if (name in emptyStyle) {
-      return name
+
+  function addTransitionClass (el, cls) {
+    var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
+    if (transitionClasses.indexOf(cls) < 0) {
+      transitionClasses.push(cls);
+      addClass(el, cls);
     }
   }
-});
 
-function updateStyle (oldVnode, vnode) {
-  var data = vnode.data;
-  var oldData = oldVnode.data;
+  function removeTransitionClass (el, cls) {
+    if (el._transitionClasses) {
+      remove(el._transitionClasses, cls);
+    }
+    removeClass(el, cls);
+  }
 
-  if (isUndef(data.staticStyle) && isUndef(data.style) &&
-    isUndef(oldData.staticStyle) && isUndef(oldData.style)
+  function whenTransitionEnds (
+    el,
+    expectedType,
+    cb
   ) {
-    return
+    var ref = getTransitionInfo(el, expectedType);
+    var type = ref.type;
+    var timeout = ref.timeout;
+    var propCount = ref.propCount;
+    if (!type) { return cb() }
+    var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
+    var ended = 0;
+    var end = function () {
+      el.removeEventListener(event, onEnd);
+      cb();
+    };
+    var onEnd = function (e) {
+      if (e.target === el) {
+        if (++ended >= propCount) {
+          end();
+        }
+      }
+    };
+    setTimeout(function () {
+      if (ended < propCount) {
+        end();
+      }
+    }, timeout + 1);
+    el.addEventListener(event, onEnd);
   }
 
-  var cur, name;
-  var el = vnode.elm;
-  var oldStaticStyle = oldData.staticStyle;
-  var oldStyleBinding = oldData.normalizedStyle || oldData.style || {};
-
-  // if static style exists, stylebinding already merged into it when doing normalizeStyleData
-  var oldStyle = oldStaticStyle || oldStyleBinding;
+  var transformRE = /\b(transform|all)(,|$)/;
 
-  var style = normalizeStyleBinding(vnode.data.style) || {};
+  function getTransitionInfo (el, expectedType) {
+    var styles = window.getComputedStyle(el);
+    // JSDOM may return undefined for transition properties
+    var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
+    var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
+    var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
+    var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
+    var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
+    var animationTimeout = getTimeout(animationDelays, animationDurations);
 
-  // store normalized style under a different key for next diff
-  // make sure to clone it if it's reactive, since the user likely wants
-  // to mutate it.
-  vnode.data.normalizedStyle = isDef(style.__ob__)
-    ? extend({}, style)
-    : style;
-
-  var newStyle = getStyle(vnode, true);
-
-  for (name in oldStyle) {
-    if (isUndef(newStyle[name])) {
-      setProp(el, name, '');
+    var type;
+    var timeout = 0;
+    var propCount = 0;
+    /* istanbul ignore if */
+    if (expectedType === TRANSITION) {
+      if (transitionTimeout > 0) {
+        type = TRANSITION;
+        timeout = transitionTimeout;
+        propCount = transitionDurations.length;
+      }
+    } else if (expectedType === ANIMATION) {
+      if (animationTimeout > 0) {
+        type = ANIMATION;
+        timeout = animationTimeout;
+        propCount = animationDurations.length;
+      }
+    } else {
+      timeout = Math.max(transitionTimeout, animationTimeout);
+      type = timeout > 0
+        ? transitionTimeout > animationTimeout
+          ? TRANSITION
+          : ANIMATION
+        : null;
+      propCount = type
+        ? type === TRANSITION
+          ? transitionDurations.length
+          : animationDurations.length
+        : 0;
+    }
+    var hasTransform =
+      type === TRANSITION &&
+      transformRE.test(styles[transitionProp + 'Property']);
+    return {
+      type: type,
+      timeout: timeout,
+      propCount: propCount,
+      hasTransform: hasTransform
+    }
+  }
+
+  function getTimeout (delays, durations) {
+    /* istanbul ignore next */
+    while (delays.length < durations.length) {
+      delays = delays.concat(delays);
     }
+
+    return Math.max.apply(null, durations.map(function (d, i) {
+      return toMs(d) + toMs(delays[i])
+    }))
   }
-  for (name in newStyle) {
-    cur = newStyle[name];
-    if (cur !== oldStyle[name]) {
-      // ie9 setting to null has no effect, must use empty string
-      setProp(el, name, cur == null ? '' : cur);
-    }
+
+  // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+  // in a locale-dependent way, using a comma instead of a dot.
+  // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+  // as a floor function) causing unexpected behaviors
+  function toMs (s) {
+    return Number(s.slice(0, -1).replace(',', '.')) * 1000
   }
-}
 
-var style = {
-  create: updateStyle,
-  update: updateStyle
-};
+  /*  */
 
-/*  */
+  function enter (vnode, toggleDisplay) {
+    var el = vnode.elm;
 
-/**
- * Add class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function addClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
+    // call leave callback now
+    if (isDef(el._leaveCb)) {
+      el._leaveCb.cancelled = true;
+      el._leaveCb();
+    }
 
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.add(c); });
-    } else {
-      el.classList.add(cls);
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data)) {
+      return
     }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    if (cur.indexOf(' ' + cls + ' ') < 0) {
-      el.setAttribute('class', (cur + cls).trim());
+
+    /* istanbul ignore if */
+    if (isDef(el._enterCb) || el.nodeType !== 1) {
+      return
     }
-  }
-}
 
-/**
- * Remove class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-function removeClass (el, cls) {
-  /* istanbul ignore if */
-  if (!cls || !(cls = cls.trim())) {
-    return
-  }
+    var css = data.css;
+    var type = data.type;
+    var enterClass = data.enterClass;
+    var enterToClass = data.enterToClass;
+    var enterActiveClass = data.enterActiveClass;
+    var appearClass = data.appearClass;
+    var appearToClass = data.appearToClass;
+    var appearActiveClass = data.appearActiveClass;
+    var beforeEnter = data.beforeEnter;
+    var enter = data.enter;
+    var afterEnter = data.afterEnter;
+    var enterCancelled = data.enterCancelled;
+    var beforeAppear = data.beforeAppear;
+    var appear = data.appear;
+    var afterAppear = data.afterAppear;
+    var appearCancelled = data.appearCancelled;
+    var duration = data.duration;
+
+    // activeInstance will always be the <transition> component managing this
+    // transition. One edge case to check is when the <transition> is placed
+    // as the root node of a child component. In that case we need to check
+    // <transition>'s parent for appear check.
+    var context = activeInstance;
+    var transitionNode = activeInstance.$vnode;
+    while (transitionNode && transitionNode.parent) {
+      context = transitionNode.context;
+      transitionNode = transitionNode.parent;
+    }
+
+    var isAppear = !context._isMounted || !vnode.isRootInsert;
+
+    if (isAppear && !appear && appear !== '') {
+      return
+    }
 
-  /* istanbul ignore else */
-  if (el.classList) {
-    if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(function (c) { return el.classList.remove(c); });
-    } else {
-      el.classList.remove(cls);
+    var startClass = isAppear && appearClass
+      ? appearClass
+      : enterClass;
+    var activeClass = isAppear && appearActiveClass
+      ? appearActiveClass
+      : enterActiveClass;
+    var toClass = isAppear && appearToClass
+      ? appearToClass
+      : enterToClass;
+
+    var beforeEnterHook = isAppear
+      ? (beforeAppear || beforeEnter)
+      : beforeEnter;
+    var enterHook = isAppear
+      ? (typeof appear === 'function' ? appear : enter)
+      : enter;
+    var afterEnterHook = isAppear
+      ? (afterAppear || afterEnter)
+      : afterEnter;
+    var enterCancelledHook = isAppear
+      ? (appearCancelled || enterCancelled)
+      : enterCancelled;
+
+    var explicitEnterDuration = toNumber(
+      isObject(duration)
+        ? duration.enter
+        : duration
+    );
+
+    if (explicitEnterDuration != null) {
+      checkDuration(explicitEnterDuration, 'enter', vnode);
     }
-    if (!el.classList.length) {
-      el.removeAttribute('class');
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(enterHook);
+
+    var cb = el._enterCb = once(function () {
+      if (expectsCSS) {
+        removeTransitionClass(el, toClass);
+        removeTransitionClass(el, activeClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, startClass);
+        }
+        enterCancelledHook && enterCancelledHook(el);
+      } else {
+        afterEnterHook && afterEnterHook(el);
+      }
+      el._enterCb = null;
+    });
+
+    if (!vnode.data.show) {
+      // remove pending leave element on enter by injecting an insert hook
+      mergeVNodeHook(vnode, 'insert', function () {
+        var parent = el.parentNode;
+        var pendingNode = parent && parent._pending && parent._pending[vnode.key];
+        if (pendingNode &&
+          pendingNode.tag === vnode.tag &&
+          pendingNode.elm._leaveCb
+        ) {
+          pendingNode.elm._leaveCb();
+        }
+        enterHook && enterHook(el, cb);
+      });
     }
-  } else {
-    var cur = " " + (el.getAttribute('class') || '') + " ";
-    var tar = ' ' + cls + ' ';
-    while (cur.indexOf(tar) >= 0) {
-      cur = cur.replace(tar, ' ');
-    }
-    cur = cur.trim();
-    if (cur) {
-      el.setAttribute('class', cur);
-    } else {
-      el.removeAttribute('class');
+
+    // start enter transition
+    beforeEnterHook && beforeEnterHook(el);
+    if (expectsCSS) {
+      addTransitionClass(el, startClass);
+      addTransitionClass(el, activeClass);
+      nextFrame(function () {
+        removeTransitionClass(el, startClass);
+        if (!cb.cancelled) {
+          addTransitionClass(el, toClass);
+          if (!userWantsControl) {
+            if (isValidDuration(explicitEnterDuration)) {
+              setTimeout(cb, explicitEnterDuration);
+            } else {
+              whenTransitionEnds(el, type, cb);
+            }
+          }
+        }
+      });
     }
-  }
-}
 
-/*  */
+    if (vnode.data.show) {
+      toggleDisplay && toggleDisplay();
+      enterHook && enterHook(el, cb);
+    }
 
-function resolveTransition (def) {
-  if (!def) {
-    return
-  }
-  /* istanbul ignore else */
-  if (typeof def === 'object') {
-    var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+    if (!expectsCSS && !userWantsControl) {
+      cb();
     }
-    extend(res, def);
-    return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
-  }
-}
-
-var autoCssTransition = cached(function (name) {
-  return {
-    enterClass: (name + "-enter"),
-    enterToClass: (name + "-enter-to"),
-    enterActiveClass: (name + "-enter-active"),
-    leaveClass: (name + "-leave"),
-    leaveToClass: (name + "-leave-to"),
-    leaveActiveClass: (name + "-leave-active")
-  }
-});
-
-var hasTransition = inBrowser && !isIE9;
-var TRANSITION = 'transition';
-var ANIMATION = 'animation';
-
-// Transition property/event sniffing
-var transitionProp = 'transition';
-var transitionEndEvent = 'transitionend';
-var animationProp = 'animation';
-var animationEndEvent = 'animationend';
-if (hasTransition) {
-  /* istanbul ignore if */
-  if (window.ontransitionend === undefined &&
-    window.onwebkittransitionend !== undefined
-  ) {
-    transitionProp = 'WebkitTransition';
-    transitionEndEvent = 'webkitTransitionEnd';
-  }
-  if (window.onanimationend === undefined &&
-    window.onwebkitanimationend !== undefined
-  ) {
-    animationProp = 'WebkitAnimation';
-    animationEndEvent = 'webkitAnimationEnd';
   }
-}
 
-// binding to window is necessary to make hot reload work in IE in strict mode
-var raf = inBrowser
-  ? window.requestAnimationFrame
-    ? window.requestAnimationFrame.bind(window)
-    : setTimeout
-  : /* istanbul ignore next */ function (fn) { return fn(); };
+  function leave (vnode, rm) {
+    var el = vnode.elm;
 
-function nextFrame (fn) {
-  raf(function () {
-    raf(fn);
-  });
-}
-
-function addTransitionClass (el, cls) {
-  var transitionClasses = el._transitionClasses || (el._transitionClasses = []);
-  if (transitionClasses.indexOf(cls) < 0) {
-    transitionClasses.push(cls);
-    addClass(el, cls);
-  }
-}
-
-function removeTransitionClass (el, cls) {
-  if (el._transitionClasses) {
-    remove(el._transitionClasses, cls);
-  }
-  removeClass(el, cls);
-}
-
-function whenTransitionEnds (
-  el,
-  expectedType,
-  cb
-) {
-  var ref = getTransitionInfo(el, expectedType);
-  var type = ref.type;
-  var timeout = ref.timeout;
-  var propCount = ref.propCount;
-  if (!type) { return cb() }
-  var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
-  var ended = 0;
-  var end = function () {
-    el.removeEventListener(event, onEnd);
-    cb();
-  };
-  var onEnd = function (e) {
-    if (e.target === el) {
-      if (++ended >= propCount) {
-        end();
-      }
+    // call enter callback now
+    if (isDef(el._enterCb)) {
+      el._enterCb.cancelled = true;
+      el._enterCb();
     }
-  };
-  setTimeout(function () {
-    if (ended < propCount) {
-      end();
-    }
-  }, timeout + 1);
-  el.addEventListener(event, onEnd);
-}
-
-var transformRE = /\b(transform|all)(,|$)/;
-
-function getTransitionInfo (el, expectedType) {
-  var styles = window.getComputedStyle(el);
-  var transitionDelays = styles[transitionProp + 'Delay'].split(', ');
-  var transitionDurations = styles[transitionProp + 'Duration'].split(', ');
-  var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
-  var animationDelays = styles[animationProp + 'Delay'].split(', ');
-  var animationDurations = styles[animationProp + 'Duration'].split(', ');
-  var animationTimeout = getTimeout(animationDelays, animationDurations);
-
-  var type;
-  var timeout = 0;
-  var propCount = 0;
-  /* istanbul ignore if */
-  if (expectedType === TRANSITION) {
-    if (transitionTimeout > 0) {
-      type = TRANSITION;
-      timeout = transitionTimeout;
-      propCount = transitionDurations.length;
-    }
-  } else if (expectedType === ANIMATION) {
-    if (animationTimeout > 0) {
-      type = ANIMATION;
-      timeout = animationTimeout;
-      propCount = animationDurations.length;
+
+    var data = resolveTransition(vnode.data.transition);
+    if (isUndef(data) || el.nodeType !== 1) {
+      return rm()
     }
-  } else {
-    timeout = Math.max(transitionTimeout, animationTimeout);
-    type = timeout > 0
-      ? transitionTimeout > animationTimeout
-        ? TRANSITION
-        : ANIMATION
-      : null;
-    propCount = type
-      ? type === TRANSITION
-        ? transitionDurations.length
-        : animationDurations.length
-      : 0;
-  }
-  var hasTransform =
-    type === TRANSITION &&
-    transformRE.test(styles[transitionProp + 'Property']);
-  return {
-    type: type,
-    timeout: timeout,
-    propCount: propCount,
-    hasTransform: hasTransform
-  }
-}
-
-function getTimeout (delays, durations) {
-  /* istanbul ignore next */
-  while (delays.length < durations.length) {
-    delays = delays.concat(delays);
-  }
 
-  return Math.max.apply(null, durations.map(function (d, i) {
-    return toMs(d) + toMs(delays[i])
-  }))
-}
+    /* istanbul ignore if */
+    if (isDef(el._leaveCb)) {
+      return
+    }
 
-function toMs (s) {
-  return Number(s.slice(0, -1)) * 1000
-}
+    var css = data.css;
+    var type = data.type;
+    var leaveClass = data.leaveClass;
+    var leaveToClass = data.leaveToClass;
+    var leaveActiveClass = data.leaveActiveClass;
+    var beforeLeave = data.beforeLeave;
+    var leave = data.leave;
+    var afterLeave = data.afterLeave;
+    var leaveCancelled = data.leaveCancelled;
+    var delayLeave = data.delayLeave;
+    var duration = data.duration;
+
+    var expectsCSS = css !== false && !isIE9;
+    var userWantsControl = getHookArgumentsLength(leave);
+
+    var explicitLeaveDuration = toNumber(
+      isObject(duration)
+        ? duration.leave
+        : duration
+    );
 
-/*  */
+    if (isDef(explicitLeaveDuration)) {
+      checkDuration(explicitLeaveDuration, 'leave', vnode);
+    }
 
-function enter (vnode, toggleDisplay) {
-  var el = vnode.elm;
+    var cb = el._leaveCb = once(function () {
+      if (el.parentNode && el.parentNode._pending) {
+        el.parentNode._pending[vnode.key] = null;
+      }
+      if (expectsCSS) {
+        removeTransitionClass(el, leaveToClass);
+        removeTransitionClass(el, leaveActiveClass);
+      }
+      if (cb.cancelled) {
+        if (expectsCSS) {
+          removeTransitionClass(el, leaveClass);
+        }
+        leaveCancelled && leaveCancelled(el);
+      } else {
+        rm();
+        afterLeave && afterLeave(el);
+      }
+      el._leaveCb = null;
+    });
 
-  // call leave callback now
-  if (isDef(el._leaveCb)) {
-    el._leaveCb.cancelled = true;
-    el._leaveCb();
-  }
+    if (delayLeave) {
+      delayLeave(performLeave);
+    } else {
+      performLeave();
+    }
 
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data)) {
-    return
+    function performLeave () {
+      // the delayed leave may have already been cancelled
+      if (cb.cancelled) {
+        return
+      }
+      // record leaving element
+      if (!vnode.data.show && el.parentNode) {
+        (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
+      }
+      beforeLeave && beforeLeave(el);
+      if (expectsCSS) {
+        addTransitionClass(el, leaveClass);
+        addTransitionClass(el, leaveActiveClass);
+        nextFrame(function () {
+          removeTransitionClass(el, leaveClass);
+          if (!cb.cancelled) {
+            addTransitionClass(el, leaveToClass);
+            if (!userWantsControl) {
+              if (isValidDuration(explicitLeaveDuration)) {
+                setTimeout(cb, explicitLeaveDuration);
+              } else {
+                whenTransitionEnds(el, type, cb);
+              }
+            }
+          }
+        });
+      }
+      leave && leave(el, cb);
+      if (!expectsCSS && !userWantsControl) {
+        cb();
+      }
+    }
   }
 
-  /* istanbul ignore if */
-  if (isDef(el._enterCb) || el.nodeType !== 1) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var enterClass = data.enterClass;
-  var enterToClass = data.enterToClass;
-  var enterActiveClass = data.enterActiveClass;
-  var appearClass = data.appearClass;
-  var appearToClass = data.appearToClass;
-  var appearActiveClass = data.appearActiveClass;
-  var beforeEnter = data.beforeEnter;
-  var enter = data.enter;
-  var afterEnter = data.afterEnter;
-  var enterCancelled = data.enterCancelled;
-  var beforeAppear = data.beforeAppear;
-  var appear = data.appear;
-  var afterAppear = data.afterAppear;
-  var appearCancelled = data.appearCancelled;
-  var duration = data.duration;
-
-  // activeInstance will always be the <transition> component managing this
-  // transition. One edge case to check is when the <transition> is placed
-  // as the root node of a child component. In that case we need to check
-  // <transition>'s parent for appear check.
-  var context = activeInstance;
-  var transitionNode = activeInstance.$vnode;
-  while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent;
-    context = transitionNode.context;
-  }
-
-  var isAppear = !context._isMounted || !vnode.isRootInsert;
-
-  if (isAppear && !appear && appear !== '') {
-    return
-  }
-
-  var startClass = isAppear && appearClass
-    ? appearClass
-    : enterClass;
-  var activeClass = isAppear && appearActiveClass
-    ? appearActiveClass
-    : enterActiveClass;
-  var toClass = isAppear && appearToClass
-    ? appearToClass
-    : enterToClass;
-
-  var beforeEnterHook = isAppear
-    ? (beforeAppear || beforeEnter)
-    : beforeEnter;
-  var enterHook = isAppear
-    ? (typeof appear === 'function' ? appear : enter)
-    : enter;
-  var afterEnterHook = isAppear
-    ? (afterAppear || afterEnter)
-    : afterEnter;
-  var enterCancelledHook = isAppear
-    ? (appearCancelled || enterCancelled)
-    : enterCancelled;
-
-  var explicitEnterDuration = toNumber(
-    isObject(duration)
-      ? duration.enter
-      : duration
-  );
-
-  if ("development" !== 'production' && explicitEnterDuration != null) {
-    checkDuration(explicitEnterDuration, 'enter', vnode);
+  // only used in dev mode
+  function checkDuration (val, name, vnode) {
+    if (typeof val !== 'number') {
+      warn(
+        "<transition> explicit " + name + " duration is not a valid number - " +
+        "got " + (JSON.stringify(val)) + ".",
+        vnode.context
+      );
+    } else if (isNaN(val)) {
+      warn(
+        "<transition> explicit " + name + " duration is NaN - " +
+        'the duration expression might be incorrect.',
+        vnode.context
+      );
+    }
   }
 
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(enterHook);
+  function isValidDuration (val) {
+    return typeof val === 'number' && !isNaN(val)
+  }
 
-  var cb = el._enterCb = once(function () {
-    if (expectsCSS) {
-      removeTransitionClass(el, toClass);
-      removeTransitionClass(el, activeClass);
+  /**
+   * Normalize a transition hook's argument length. The hook may be:
+   * - a merged hook (invoker) with the original in .fns
+   * - a wrapped component method (check ._length)
+   * - a plain function (.length)
+   */
+  function getHookArgumentsLength (fn) {
+    if (isUndef(fn)) {
+      return false
     }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, startClass);
-      }
-      enterCancelledHook && enterCancelledHook(el);
+    var invokerFns = fn.fns;
+    if (isDef(invokerFns)) {
+      // invoker
+      return getHookArgumentsLength(
+        Array.isArray(invokerFns)
+          ? invokerFns[0]
+          : invokerFns
+      )
     } else {
-      afterEnterHook && afterEnterHook(el);
+      return (fn._length || fn.length) > 1
     }
-    el._enterCb = null;
-  });
-
-  if (!vnode.data.show) {
-    // remove pending leave element on enter by injecting an insert hook
-    mergeVNodeHook(vnode, 'insert', function () {
-      var parent = el.parentNode;
-      var pendingNode = parent && parent._pending && parent._pending[vnode.key];
-      if (pendingNode &&
-        pendingNode.tag === vnode.tag &&
-        pendingNode.elm._leaveCb
-      ) {
-        pendingNode.elm._leaveCb();
-      }
-      enterHook && enterHook(el, cb);
-    });
   }
 
-  // start enter transition
-  beforeEnterHook && beforeEnterHook(el);
-  if (expectsCSS) {
-    addTransitionClass(el, startClass);
-    addTransitionClass(el, activeClass);
-    nextFrame(function () {
-      addTransitionClass(el, toClass);
-      removeTransitionClass(el, startClass);
-      if (!cb.cancelled && !userWantsControl) {
-        if (isValidDuration(explicitEnterDuration)) {
-          setTimeout(cb, explicitEnterDuration);
-        } else {
-          whenTransitionEnds(el, type, cb);
-        }
-      }
-    });
+  function _enter (_, vnode) {
+    if (vnode.data.show !== true) {
+      enter(vnode);
+    }
   }
 
-  if (vnode.data.show) {
-    toggleDisplay && toggleDisplay();
-    enterHook && enterHook(el, cb);
-  }
+  var transition = inBrowser ? {
+    create: _enter,
+    activate: _enter,
+    remove: function remove$$1 (vnode, rm) {
+      /* istanbul ignore else */
+      if (vnode.data.show !== true) {
+        leave(vnode, rm);
+      } else {
+        rm();
+      }
+    }
+  } : {};
 
-  if (!expectsCSS && !userWantsControl) {
-    cb();
-  }
-}
+  var platformModules = [
+    attrs,
+    klass,
+    events,
+    domProps,
+    style,
+    transition
+  ];
 
-function leave (vnode, rm) {
-  var el = vnode.elm;
+  /*  */
 
-  // call enter callback now
-  if (isDef(el._enterCb)) {
-    el._enterCb.cancelled = true;
-    el._enterCb();
-  }
+  // the directive module should be applied last, after all
+  // built-in modules have been applied.
+  var modules = platformModules.concat(baseModules);
 
-  var data = resolveTransition(vnode.data.transition);
-  if (isUndef(data) || el.nodeType !== 1) {
-    return rm()
-  }
+  var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
 
-  /* istanbul ignore if */
-  if (isDef(el._leaveCb)) {
-    return
-  }
-
-  var css = data.css;
-  var type = data.type;
-  var leaveClass = data.leaveClass;
-  var leaveToClass = data.leaveToClass;
-  var leaveActiveClass = data.leaveActiveClass;
-  var beforeLeave = data.beforeLeave;
-  var leave = data.leave;
-  var afterLeave = data.afterLeave;
-  var leaveCancelled = data.leaveCancelled;
-  var delayLeave = data.delayLeave;
-  var duration = data.duration;
-
-  var expectsCSS = css !== false && !isIE9;
-  var userWantsControl = getHookArgumentsLength(leave);
-
-  var explicitLeaveDuration = toNumber(
-    isObject(duration)
-      ? duration.leave
-      : duration
-  );
+  /**
+   * Not type checking this file because flow doesn't like attaching
+   * properties to Elements.
+   */
 
-  if ("development" !== 'production' && isDef(explicitLeaveDuration)) {
-    checkDuration(explicitLeaveDuration, 'leave', vnode);
+  /* istanbul ignore if */
+  if (isIE9) {
+    // http://www.matts411.com/post/internet-explorer-9-oninput/
+    document.addEventListener('selectionchange', function () {
+      var el = document.activeElement;
+      if (el && el.vmodel) {
+        trigger(el, 'input');
+      }
+    });
   }
 
-  var cb = el._leaveCb = once(function () {
-    if (el.parentNode && el.parentNode._pending) {
-      el.parentNode._pending[vnode.key] = null;
-    }
-    if (expectsCSS) {
-      removeTransitionClass(el, leaveToClass);
-      removeTransitionClass(el, leaveActiveClass);
-    }
-    if (cb.cancelled) {
-      if (expectsCSS) {
-        removeTransitionClass(el, leaveClass);
+  var directive = {
+    inserted: function inserted (el, binding, vnode, oldVnode) {
+      if (vnode.tag === 'select') {
+        // #6903
+        if (oldVnode.elm && !oldVnode.elm._vOptions) {
+          mergeVNodeHook(vnode, 'postpatch', function () {
+            directive.componentUpdated(el, binding, vnode);
+          });
+        } else {
+          setSelected(el, binding, vnode.context);
+        }
+        el._vOptions = [].map.call(el.options, getValue);
+      } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
+        el._vModifiers = binding.modifiers;
+        if (!binding.modifiers.lazy) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+          // Safari < 10.2 & UIWebView doesn't fire compositionend when
+          // switching focus before confirming composition choice
+          // this also fixes the issue where some browsers e.g. iOS Chrome
+          // fires "change" instead of "input" on autocomplete.
+          el.addEventListener('change', onCompositionEnd);
+          /* istanbul ignore if */
+          if (isIE9) {
+            el.vmodel = true;
+          }
+        }
+      }
+    },
+
+    componentUpdated: function componentUpdated (el, binding, vnode) {
+      if (vnode.tag === 'select') {
+        setSelected(el, binding, vnode.context);
+        // in case the options rendered by v-for have changed,
+        // it's possible that the value is out-of-sync with the rendered options.
+        // detect such cases and filter out values that no longer has a matching
+        // option in the DOM.
+        var prevOptions = el._vOptions;
+        var curOptions = el._vOptions = [].map.call(el.options, getValue);
+        if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
+          // trigger change event if
+          // no matching option found for at least one value
+          var needReset = el.multiple
+            ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
+            : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
+          if (needReset) {
+            trigger(el, 'change');
+          }
+        }
       }
-      leaveCancelled && leaveCancelled(el);
-    } else {
-      rm();
-      afterLeave && afterLeave(el);
     }
-    el._leaveCb = null;
-  });
+  };
 
-  if (delayLeave) {
-    delayLeave(performLeave);
-  } else {
-    performLeave();
+  function setSelected (el, binding, vm) {
+    actuallySetSelected(el, binding, vm);
+    /* istanbul ignore if */
+    if (isIE || isEdge) {
+      setTimeout(function () {
+        actuallySetSelected(el, binding, vm);
+      }, 0);
+    }
   }
 
-  function performLeave () {
-    // the delayed leave may have already been cancelled
-    if (cb.cancelled) {
+  function actuallySetSelected (el, binding, vm) {
+    var value = binding.value;
+    var isMultiple = el.multiple;
+    if (isMultiple && !Array.isArray(value)) {
+      warn(
+        "<select multiple v-model=\"" + (binding.expression) + "\"> " +
+        "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
+        vm
+      );
       return
     }
-    // record leaving element
-    if (!vnode.data.show) {
-      (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key)] = vnode;
-    }
-    beforeLeave && beforeLeave(el);
-    if (expectsCSS) {
-      addTransitionClass(el, leaveClass);
-      addTransitionClass(el, leaveActiveClass);
-      nextFrame(function () {
-        addTransitionClass(el, leaveToClass);
-        removeTransitionClass(el, leaveClass);
-        if (!cb.cancelled && !userWantsControl) {
-          if (isValidDuration(explicitLeaveDuration)) {
-            setTimeout(cb, explicitLeaveDuration);
-          } else {
-            whenTransitionEnds(el, type, cb);
+    var selected, option;
+    for (var i = 0, l = el.options.length; i < l; i++) {
+      option = el.options[i];
+      if (isMultiple) {
+        selected = looseIndexOf(value, getValue(option)) > -1;
+        if (option.selected !== selected) {
+          option.selected = selected;
+        }
+      } else {
+        if (looseEqual(getValue(option), value)) {
+          if (el.selectedIndex !== i) {
+            el.selectedIndex = i;
           }
+          return
         }
-      });
+      }
     }
-    leave && leave(el, cb);
-    if (!expectsCSS && !userWantsControl) {
-      cb();
+    if (!isMultiple) {
+      el.selectedIndex = -1;
     }
   }
-}
 
-// only used in dev mode
-function checkDuration (val, name, vnode) {
-  if (typeof val !== 'number') {
-    warn(
-      "<transition> explicit " + name + " duration is not a valid number - " +
-      "got " + (JSON.stringify(val)) + ".",
-      vnode.context
-    );
-  } else if (isNaN(val)) {
-    warn(
-      "<transition> explicit " + name + " duration is NaN - " +
-      'the duration expression might be incorrect.',
-      vnode.context
-    );
+  function hasNoMatchingOption (value, options) {
+    return options.every(function (o) { return !looseEqual(o, value); })
   }
-}
 
-function isValidDuration (val) {
-  return typeof val === 'number' && !isNaN(val)
-}
-
-/**
- * Normalize a transition hook's argument length. The hook may be:
- * - a merged hook (invoker) with the original in .fns
- * - a wrapped component method (check ._length)
- * - a plain function (.length)
- */
-function getHookArgumentsLength (fn) {
-  if (isUndef(fn)) {
-    return false
-  }
-  var invokerFns = fn.fns;
-  if (isDef(invokerFns)) {
-    // invoker
-    return getHookArgumentsLength(
-      Array.isArray(invokerFns)
-        ? invokerFns[0]
-        : invokerFns
-    )
-  } else {
-    return (fn._length || fn.length) > 1
+  function getValue (option) {
+    return '_value' in option
+      ? option._value
+      : option.value
   }
-}
 
-function _enter (_, vnode) {
-  if (vnode.data.show !== true) {
-    enter(vnode);
+  function onCompositionStart (e) {
+    e.target.composing = true;
   }
-}
 
-var transition = inBrowser ? {
-  create: _enter,
-  activate: _enter,
-  remove: function remove$$1 (vnode, rm) {
-    /* istanbul ignore else */
-    if (vnode.data.show !== true) {
-      leave(vnode, rm);
-    } else {
-      rm();
-    }
+  function onCompositionEnd (e) {
+    // prevent triggering an input event for no reason
+    if (!e.target.composing) { return }
+    e.target.composing = false;
+    trigger(e.target, 'input');
   }
-} : {};
 
-var platformModules = [
-  attrs,
-  klass,
-  events,
-  domProps,
-  style,
-  transition
-];
-
-/*  */
+  function trigger (el, type) {
+    var e = document.createEvent('HTMLEvents');
+    e.initEvent(type, true, true);
+    el.dispatchEvent(e);
+  }
 
-// the directive module should be applied last, after all
-// built-in modules have been applied.
-var modules = platformModules.concat(baseModules);
+  /*  */
 
-var patch = createPatchFunction({ nodeOps: nodeOps, modules: modules });
+  // recursively search for possible transition defined inside the component root
+  function locateNode (vnode) {
+    return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
+      ? locateNode(vnode.componentInstance._vnode)
+      : vnode
+  }
 
-/**
- * Not type checking this file because flow doesn't like attaching
- * properties to Elements.
- */
+  var show = {
+    bind: function bind (el, ref, vnode) {
+      var value = ref.value;
 
-/* istanbul ignore if */
-if (isIE9) {
-  // http://www.matts411.com/post/internet-explorer-9-oninput/
-  document.addEventListener('selectionchange', function () {
-    var el = document.activeElement;
-    if (el && el.vmodel) {
-      trigger(el, 'input');
-    }
-  });
-}
-
-var directive = {
-  inserted: function inserted (el, binding, vnode, oldVnode) {
-    if (vnode.tag === 'select') {
-      // #6903
-      if (oldVnode.elm && !oldVnode.elm._vOptions) {
-        mergeVNodeHook(vnode, 'postpatch', function () {
-          directive.componentUpdated(el, binding, vnode);
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      var originalDisplay = el.__vOriginalDisplay =
+        el.style.display === 'none' ? '' : el.style.display;
+      if (value && transition$$1) {
+        vnode.data.show = true;
+        enter(vnode, function () {
+          el.style.display = originalDisplay;
         });
       } else {
-        setSelected(el, binding, vnode.context);
+        el.style.display = value ? originalDisplay : 'none';
       }
-      el._vOptions = [].map.call(el.options, getValue);
-    } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
-      el._vModifiers = binding.modifiers;
-      if (!binding.modifiers.lazy) {
-        // Safari < 10.2 & UIWebView doesn't fire compositionend when
-        // switching focus before confirming composition choice
-        // this also fixes the issue where some browsers e.g. iOS Chrome
-        // fires "change" instead of "input" on autocomplete.
-        el.addEventListener('change', onCompositionEnd);
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart);
-          el.addEventListener('compositionend', onCompositionEnd);
-        }
-        /* istanbul ignore if */
-        if (isIE9) {
-          el.vmodel = true;
+    },
+
+    update: function update (el, ref, vnode) {
+      var value = ref.value;
+      var oldValue = ref.oldValue;
+
+      /* istanbul ignore if */
+      if (!value === !oldValue) { return }
+      vnode = locateNode(vnode);
+      var transition$$1 = vnode.data && vnode.data.transition;
+      if (transition$$1) {
+        vnode.data.show = true;
+        if (value) {
+          enter(vnode, function () {
+            el.style.display = el.__vOriginalDisplay;
+          });
+        } else {
+          leave(vnode, function () {
+            el.style.display = 'none';
+          });
         }
+      } else {
+        el.style.display = value ? el.__vOriginalDisplay : 'none';
       }
-    }
-  },
+    },
 
-  componentUpdated: function componentUpdated (el, binding, vnode) {
-    if (vnode.tag === 'select') {
-      setSelected(el, binding, vnode.context);
-      // in case the options rendered by v-for have changed,
-      // it's possible that the value is out-of-sync with the rendered options.
-      // detect such cases and filter out values that no longer has a matching
-      // option in the DOM.
-      var prevOptions = el._vOptions;
-      var curOptions = el._vOptions = [].map.call(el.options, getValue);
-      if (curOptions.some(function (o, i) { return !looseEqual(o, prevOptions[i]); })) {
-        // trigger change event if
-        // no matching option found for at least one value
-        var needReset = el.multiple
-          ? binding.value.some(function (v) { return hasNoMatchingOption(v, curOptions); })
-          : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);
-        if (needReset) {
-          trigger(el, 'change');
-        }
+    unbind: function unbind (
+      el,
+      binding,
+      vnode,
+      oldVnode,
+      isDestroy
+    ) {
+      if (!isDestroy) {
+        el.style.display = el.__vOriginalDisplay;
       }
     }
-  }
-};
+  };
 
-function setSelected (el, binding, vm) {
-  actuallySetSelected(el, binding, vm);
-  /* istanbul ignore if */
-  if (isIE || isEdge) {
-    setTimeout(function () {
-      actuallySetSelected(el, binding, vm);
-    }, 0);
-  }
-}
+  var platformDirectives = {
+    model: directive,
+    show: show
+  };
 
-function actuallySetSelected (el, binding, vm) {
-  var value = binding.value;
-  var isMultiple = el.multiple;
-  if (isMultiple && !Array.isArray(value)) {
-    "development" !== 'production' && warn(
-      "<select multiple v-model=\"" + (binding.expression) + "\"> " +
-      "expects an Array value for its binding, but got " + (Object.prototype.toString.call(value).slice(8, -1)),
-      vm
-    );
-    return
-  }
-  var selected, option;
-  for (var i = 0, l = el.options.length; i < l; i++) {
-    option = el.options[i];
-    if (isMultiple) {
-      selected = looseIndexOf(value, getValue(option)) > -1;
-      if (option.selected !== selected) {
-        option.selected = selected;
-      }
+  /*  */
+
+  var transitionProps = {
+    name: String,
+    appear: Boolean,
+    css: Boolean,
+    mode: String,
+    type: String,
+    enterClass: String,
+    leaveClass: String,
+    enterToClass: String,
+    leaveToClass: String,
+    enterActiveClass: String,
+    leaveActiveClass: String,
+    appearClass: String,
+    appearActiveClass: String,
+    appearToClass: String,
+    duration: [Number, String, Object]
+  };
+
+  // in case the child is also an abstract component, e.g. <keep-alive>
+  // we want to recursively retrieve the real component to be rendered
+  function getRealChild (vnode) {
+    var compOptions = vnode && vnode.componentOptions;
+    if (compOptions && compOptions.Ctor.options.abstract) {
+      return getRealChild(getFirstComponentChild(compOptions.children))
     } else {
-      if (looseEqual(getValue(option), value)) {
-        if (el.selectedIndex !== i) {
-          el.selectedIndex = i;
-        }
-        return
-      }
+      return vnode
     }
   }
-  if (!isMultiple) {
-    el.selectedIndex = -1;
-  }
-}
-
-function hasNoMatchingOption (value, options) {
-  return options.every(function (o) { return !looseEqual(o, value); })
-}
-
-function getValue (option) {
-  return '_value' in option
-    ? option._value
-    : option.value
-}
-
-function onCompositionStart (e) {
-  e.target.composing = true;
-}
-
-function onCompositionEnd (e) {
-  // prevent triggering an input event for no reason
-  if (!e.target.composing) { return }
-  e.target.composing = false;
-  trigger(e.target, 'input');
-}
-
-function trigger (el, type) {
-  var e = document.createEvent('HTMLEvents');
-  e.initEvent(type, true, true);
-  el.dispatchEvent(e);
-}
-
-/*  */
-
-// recursively search for possible transition defined inside the component root
-function locateNode (vnode) {
-  return vnode.componentInstance && (!vnode.data || !vnode.data.transition)
-    ? locateNode(vnode.componentInstance._vnode)
-    : vnode
-}
-
-var show = {
-  bind: function bind (el, ref, vnode) {
-    var value = ref.value;
-
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    var originalDisplay = el.__vOriginalDisplay =
-      el.style.display === 'none' ? '' : el.style.display;
-    if (value && transition$$1) {
-      vnode.data.show = true;
-      enter(vnode, function () {
-        el.style.display = originalDisplay;
-      });
-    } else {
-      el.style.display = value ? originalDisplay : 'none';
-    }
-  },
-
-  update: function update (el, ref, vnode) {
-    var value = ref.value;
-    var oldValue = ref.oldValue;
 
-    /* istanbul ignore if */
-    if (value === oldValue) { return }
-    vnode = locateNode(vnode);
-    var transition$$1 = vnode.data && vnode.data.transition;
-    if (transition$$1) {
-      vnode.data.show = true;
-      if (value) {
-        enter(vnode, function () {
-          el.style.display = el.__vOriginalDisplay;
-        });
-      } else {
-        leave(vnode, function () {
-          el.style.display = 'none';
-        });
-      }
-    } else {
-      el.style.display = value ? el.__vOriginalDisplay : 'none';
+  function extractTransitionData (comp) {
+    var data = {};
+    var options = comp.$options;
+    // props
+    for (var key in options.propsData) {
+      data[key] = comp[key];
     }
-  },
-
-  unbind: function unbind (
-    el,
-    binding,
-    vnode,
-    oldVnode,
-    isDestroy
-  ) {
-    if (!isDestroy) {
-      el.style.display = el.__vOriginalDisplay;
-    }
-  }
-};
-
-var platformDirectives = {
-  model: directive,
-  show: show
-};
-
-/*  */
-
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
-var transitionProps = {
-  name: String,
-  appear: Boolean,
-  css: Boolean,
-  mode: String,
-  type: String,
-  enterClass: String,
-  leaveClass: String,
-  enterToClass: String,
-  leaveToClass: String,
-  enterActiveClass: String,
-  leaveActiveClass: String,
-  appearClass: String,
-  appearActiveClass: String,
-  appearToClass: String,
-  duration: [Number, String, Object]
-};
-
-// in case the child is also an abstract component, e.g. <keep-alive>
-// we want to recursively retrieve the real component to be rendered
-function getRealChild (vnode) {
-  var compOptions = vnode && vnode.componentOptions;
-  if (compOptions && compOptions.Ctor.options.abstract) {
-    return getRealChild(getFirstComponentChild(compOptions.children))
-  } else {
-    return vnode
+    // events.
+    // extract listeners and pass them directly to the transition methods
+    var listeners = options._parentListeners;
+    for (var key$1 in listeners) {
+      data[camelize(key$1)] = listeners[key$1];
+    }
+    return data
   }
-}
 
-function extractTransitionData (comp) {
-  var data = {};
-  var options = comp.$options;
-  // props
-  for (var key in options.propsData) {
-    data[key] = comp[key];
-  }
-  // events.
-  // extract listeners and pass them directly to the transition methods
-  var listeners = options._parentListeners;
-  for (var key$1 in listeners) {
-    data[camelize(key$1)] = listeners[key$1];
+  function placeholder (h, rawChild) {
+    if (/\d-keep-alive$/.test(rawChild.tag)) {
+      return h('keep-alive', {
+        props: rawChild.componentOptions.propsData
+      })
+    }
   }
-  return data
-}
 
-function placeholder (h, rawChild) {
-  if (/\d-keep-alive$/.test(rawChild.tag)) {
-    return h('keep-alive', {
-      props: rawChild.componentOptions.propsData
-    })
+  function hasParentTransition (vnode) {
+    while ((vnode = vnode.parent)) {
+      if (vnode.data.transition) {
+        return true
+      }
+    }
   }
-}
 
-function hasParentTransition (vnode) {
-  while ((vnode = vnode.parent)) {
-    if (vnode.data.transition) {
-      return true
-    }
+  function isSameChild (child, oldChild) {
+    return oldChild.key === child.key && oldChild.tag === child.tag
   }
-}
 
-function isSameChild (child, oldChild) {
-  return oldChild.key === child.key && oldChild.tag === child.tag
-}
+  var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
 
-var Transition = {
-  name: 'transition',
-  props: transitionProps,
-  abstract: true,
+  var isVShowDirective = function (d) { return d.name === 'show'; };
 
-  render: function render (h) {
-    var this$1 = this;
+  var Transition = {
+    name: 'transition',
+    props: transitionProps,
+    abstract: true,
 
-    var children = this.$slots.default;
-    if (!children) {
-      return
-    }
+    render: function render (h) {
+      var this$1 = this;
 
-    // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
-    /* istanbul ignore if */
-    if (!children.length) {
-      return
-    }
+      var children = this.$slots.default;
+      if (!children) {
+        return
+      }
 
-    // warn multiple elements
-    if ("development" !== 'production' && children.length > 1) {
-      warn(
-        '<transition> can only be used on a single element. Use ' +
-        '<transition-group> for lists.',
-        this.$parent
-      );
-    }
+      // filter out text nodes (possible whitespaces)
+      children = children.filter(isNotTextNode);
+      /* istanbul ignore if */
+      if (!children.length) {
+        return
+      }
+
+      // warn multiple elements
+      if (children.length > 1) {
+        warn(
+          '<transition> can only be used on a single element. Use ' +
+          '<transition-group> for lists.',
+          this.$parent
+        );
+      }
 
-    var mode = this.mode;
+      var mode = this.mode;
 
-    // warn invalid mode
-    if ("development" !== 'production' &&
-      mode && mode !== 'in-out' && mode !== 'out-in'
-    ) {
-      warn(
-        'invalid <transition> mode: ' + mode,
-        this.$parent
-      );
-    }
+      // warn invalid mode
+      if (mode && mode !== 'in-out' && mode !== 'out-in'
+      ) {
+        warn(
+          'invalid <transition> mode: ' + mode,
+          this.$parent
+        );
+      }
 
-    var rawChild = children[0];
+      var rawChild = children[0];
 
-    // if this is a component root node and the component's
-    // parent container node also has transition, skip.
-    if (hasParentTransition(this.$vnode)) {
-      return rawChild
-    }
+      // if this is a component root node and the component's
+      // parent container node also has transition, skip.
+      if (hasParentTransition(this.$vnode)) {
+        return rawChild
+      }
 
-    // apply transition data to child
-    // use getRealChild() to ignore abstract components e.g. keep-alive
-    var child = getRealChild(rawChild);
-    /* istanbul ignore if */
-    if (!child) {
-      return rawChild
-    }
+      // apply transition data to child
+      // use getRealChild() to ignore abstract components e.g. keep-alive
+      var child = getRealChild(rawChild);
+      /* istanbul ignore if */
+      if (!child) {
+        return rawChild
+      }
 
-    if (this._leaving) {
-      return placeholder(h, rawChild)
-    }
+      if (this._leaving) {
+        return placeholder(h, rawChild)
+      }
 
-    // ensure a key that is unique to the vnode type and to this transition
-    // component instance. This key will be used to remove pending leaving nodes
-    // during entering.
-    var id = "__transition-" + (this._uid) + "-";
-    child.key = child.key == null
-      ? child.isComment
-        ? id + 'comment'
-        : id + child.tag
-      : isPrimitive(child.key)
-        ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
-        : child.key;
+      // ensure a key that is unique to the vnode type and to this transition
+      // component instance. This key will be used to remove pending leaving nodes
+      // during entering.
+      var id = "__transition-" + (this._uid) + "-";
+      child.key = child.key == null
+        ? child.isComment
+          ? id + 'comment'
+          : id + child.tag
+        : isPrimitive(child.key)
+          ? (String(child.key).indexOf(id) === 0 ? child.key : id + child.key)
+          : child.key;
 
-    var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
-    var oldRawChild = this._vnode;
-    var oldChild = getRealChild(oldRawChild);
+      var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
+      var oldRawChild = this._vnode;
+      var oldChild = getRealChild(oldRawChild);
 
-    // mark v-show
-    // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
-      child.data.show = true;
-    }
+      // mark v-show
+      // so that the transition module can hand over the control to the directive
+      if (child.data.directives && child.data.directives.some(isVShowDirective)) {
+        child.data.show = true;
+      }
 
-    if (
-      oldChild &&
-      oldChild.data &&
-      !isSameChild(child, oldChild) &&
-      !isAsyncPlaceholder(oldChild) &&
-      // #6687 component root is a comment node
-      !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
-    ) {
-      // replace old child transition data with fresh one
-      // important for dynamic transitions!
-      var oldData = oldChild.data.transition = extend({}, data);
-      // handle transition mode
-      if (mode === 'out-in') {
-        // return placeholder node and queue update when leave finishes
-        this._leaving = true;
-        mergeVNodeHook(oldData, 'afterLeave', function () {
-          this$1._leaving = false;
-          this$1.$forceUpdate();
-        });
-        return placeholder(h, rawChild)
-      } else if (mode === 'in-out') {
-        if (isAsyncPlaceholder(child)) {
-          return oldRawChild
+      if (
+        oldChild &&
+        oldChild.data &&
+        !isSameChild(child, oldChild) &&
+        !isAsyncPlaceholder(oldChild) &&
+        // #6687 component root is a comment node
+        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)
+      ) {
+        // replace old child transition data with fresh one
+        // important for dynamic transitions!
+        var oldData = oldChild.data.transition = extend({}, data);
+        // handle transition mode
+        if (mode === 'out-in') {
+          // return placeholder node and queue update when leave finishes
+          this._leaving = true;
+          mergeVNodeHook(oldData, 'afterLeave', function () {
+            this$1._leaving = false;
+            this$1.$forceUpdate();
+          });
+          return placeholder(h, rawChild)
+        } else if (mode === 'in-out') {
+          if (isAsyncPlaceholder(child)) {
+            return oldRawChild
+          }
+          var delayedLeave;
+          var performLeave = function () { delayedLeave(); };
+          mergeVNodeHook(data, 'afterEnter', performLeave);
+          mergeVNodeHook(data, 'enterCancelled', performLeave);
+          mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
         }
-        var delayedLeave;
-        var performLeave = function () { delayedLeave(); };
-        mergeVNodeHook(data, 'afterEnter', performLeave);
-        mergeVNodeHook(data, 'enterCancelled', performLeave);
-        mergeVNodeHook(oldData, 'delayLeave', function (leave) { delayedLeave = leave; });
       }
-    }
 
-    return rawChild
-  }
-};
+      return rawChild
+    }
+  };
 
-/*  */
+  /*  */
 
-// Provides transition support for list items.
-// supports move transitions using the FLIP technique.
+  var props = extend({
+    tag: String,
+    moveClass: String
+  }, transitionProps);
 
-// Because the vdom's children update algorithm is "unstable" - i.e.
-// it doesn't guarantee the relative positioning of removed elements,
-// we force transition-group to update its children into two passes:
-// in the first pass, we remove all nodes that need to be removed,
-// triggering their leaving transition; in the second pass, we insert/move
-// into the final desired state. This way in the second pass removed
-// nodes will remain where they should be.
+  delete props.mode;
 
-var props = extend({
-  tag: String,
-  moveClass: String
-}, transitionProps);
+  var TransitionGroup = {
+    props: props,
 
-delete props.mode;
+    beforeMount: function beforeMount () {
+      var this$1 = this;
 
-var TransitionGroup = {
-  props: props,
+      var update = this._update;
+      this._update = function (vnode, hydrating) {
+        var restoreActiveInstance = setActiveInstance(this$1);
+        // force removing pass
+        this$1.__patch__(
+          this$1._vnode,
+          this$1.kept,
+          false, // hydrating
+          true // removeOnly (!important, avoids unnecessary moves)
+        );
+        this$1._vnode = this$1.kept;
+        restoreActiveInstance();
+        update.call(this$1, vnode, hydrating);
+      };
+    },
 
-  render: function render (h) {
-    var tag = this.tag || this.$vnode.data.tag || 'span';
-    var map = Object.create(null);
-    var prevChildren = this.prevChildren = this.children;
-    var rawChildren = this.$slots.default || [];
-    var children = this.children = [];
-    var transitionData = extractTransitionData(this);
-
-    for (var i = 0; i < rawChildren.length; i++) {
-      var c = rawChildren[i];
-      if (c.tag) {
-        if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
-          children.push(c);
-          map[c.key] = c
-          ;(c.data || (c.data = {})).transition = transitionData;
-        } else {
-          var opts = c.componentOptions;
-          var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
-          warn(("<transition-group> children must be keyed: <" + name + ">"));
+    render: function render (h) {
+      var tag = this.tag || this.$vnode.data.tag || 'span';
+      var map = Object.create(null);
+      var prevChildren = this.prevChildren = this.children;
+      var rawChildren = this.$slots.default || [];
+      var children = this.children = [];
+      var transitionData = extractTransitionData(this);
+
+      for (var i = 0; i < rawChildren.length; i++) {
+        var c = rawChildren[i];
+        if (c.tag) {
+          if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
+            children.push(c);
+            map[c.key] = c
+            ;(c.data || (c.data = {})).transition = transitionData;
+          } else {
+            var opts = c.componentOptions;
+            var name = opts ? (opts.Ctor.options.name || opts.tag || '') : c.tag;
+            warn(("<transition-group> children must be keyed: <" + name + ">"));
+          }
         }
       }
-    }
 
-    if (prevChildren) {
-      var kept = [];
-      var removed = [];
-      for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
-        var c$1 = prevChildren[i$1];
-        c$1.data.transition = transitionData;
-        c$1.data.pos = c$1.elm.getBoundingClientRect();
-        if (map[c$1.key]) {
-          kept.push(c$1);
-        } else {
-          removed.push(c$1);
+      if (prevChildren) {
+        var kept = [];
+        var removed = [];
+        for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
+          var c$1 = prevChildren[i$1];
+          c$1.data.transition = transitionData;
+          c$1.data.pos = c$1.elm.getBoundingClientRect();
+          if (map[c$1.key]) {
+            kept.push(c$1);
+          } else {
+            removed.push(c$1);
+          }
         }
+        this.kept = h(tag, null, kept);
+        this.removed = removed;
       }
-      this.kept = h(tag, null, kept);
-      this.removed = removed;
-    }
 
-    return h(tag, null, children)
-  },
+      return h(tag, null, children)
+    },
 
-  beforeUpdate: function beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
-    );
-    this._vnode = this.kept;
-  },
+    updated: function updated () {
+      var children = this.prevChildren;
+      var moveClass = this.moveClass || ((this.name || 'v') + '-move');
+      if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
+        return
+      }
 
-  updated: function updated () {
-    var children = this.prevChildren;
-    var moveClass = this.moveClass || ((this.name || 'v') + '-move');
-    if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
-      return
-    }
+      // we divide the work into three loops to avoid mixing DOM reads and writes
+      // in each iteration - which helps prevent layout thrashing.
+      children.forEach(callPendingCbs);
+      children.forEach(recordPosition);
+      children.forEach(applyTranslation);
 
-    // we divide the work into three loops to avoid mixing DOM reads and writes
-    // in each iteration - which helps prevent layout thrashing.
-    children.forEach(callPendingCbs);
-    children.forEach(recordPosition);
-    children.forEach(applyTranslation);
+      // force reflow to put everything in position
+      // assign to this to avoid being removed in tree-shaking
+      // $flow-disable-line
+      this._reflow = document.body.offsetHeight;
+
+      children.forEach(function (c) {
+        if (c.data.moved) {
+          var el = c.elm;
+          var s = el.style;
+          addTransitionClass(el, moveClass);
+          s.transform = s.WebkitTransform = s.transitionDuration = '';
+          el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+            if (e && e.target !== el) {
+              return
+            }
+            if (!e || /transform$/.test(e.propertyName)) {
+              el.removeEventListener(transitionEndEvent, cb);
+              el._moveCb = null;
+              removeTransitionClass(el, moveClass);
+            }
+          });
+        }
+      });
+    },
 
-    // force reflow to put everything in position
-    // assign to this to avoid being removed in tree-shaking
-    // $flow-disable-line
-    this._reflow = document.body.offsetHeight;
-
-    children.forEach(function (c) {
-      if (c.data.moved) {
-        var el = c.elm;
-        var s = el.style;
-        addTransitionClass(el, moveClass);
-        s.transform = s.WebkitTransform = s.transitionDuration = '';
-        el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
-          if (!e || /transform$/.test(e.propertyName)) {
-            el.removeEventListener(transitionEndEvent, cb);
-            el._moveCb = null;
-            removeTransitionClass(el, moveClass);
-          }
-        });
+    methods: {
+      hasMove: function hasMove (el, moveClass) {
+        /* istanbul ignore if */
+        if (!hasTransition) {
+          return false
+        }
+        /* istanbul ignore if */
+        if (this._hasMove) {
+          return this._hasMove
+        }
+        // Detect whether an element with the move class applied has
+        // CSS transitions. Since the element may be inside an entering
+        // transition at this very moment, we make a clone of it and remove
+        // all other transition classes applied to ensure only the move class
+        // is applied.
+        var clone = el.cloneNode();
+        if (el._transitionClasses) {
+          el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
+        }
+        addClass(clone, moveClass);
+        clone.style.display = 'none';
+        this.$el.appendChild(clone);
+        var info = getTransitionInfo(clone);
+        this.$el.removeChild(clone);
+        return (this._hasMove = info.hasTransform)
       }
-    });
-  },
+    }
+  };
 
-  methods: {
-    hasMove: function hasMove (el, moveClass) {
-      /* istanbul ignore if */
-      if (!hasTransition) {
-        return false
-      }
-      /* istanbul ignore if */
-      if (this._hasMove) {
-        return this._hasMove
-      }
-      // Detect whether an element with the move class applied has
-      // CSS transitions. Since the element may be inside an entering
-      // transition at this very moment, we make a clone of it and remove
-      // all other transition classes applied to ensure only the move class
-      // is applied.
-      var clone = el.cloneNode();
-      if (el._transitionClasses) {
-        el._transitionClasses.forEach(function (cls) { removeClass(clone, cls); });
-      }
-      addClass(clone, moveClass);
-      clone.style.display = 'none';
-      this.$el.appendChild(clone);
-      var info = getTransitionInfo(clone);
-      this.$el.removeChild(clone);
-      return (this._hasMove = info.hasTransform)
+  function callPendingCbs (c) {
+    /* istanbul ignore if */
+    if (c.elm._moveCb) {
+      c.elm._moveCb();
+    }
+    /* istanbul ignore if */
+    if (c.elm._enterCb) {
+      c.elm._enterCb();
     }
   }
-};
 
-function callPendingCbs (c) {
-  /* istanbul ignore if */
-  if (c.elm._moveCb) {
-    c.elm._moveCb();
+  function recordPosition (c) {
+    c.data.newPos = c.elm.getBoundingClientRect();
   }
-  /* istanbul ignore if */
-  if (c.elm._enterCb) {
-    c.elm._enterCb();
-  }
-}
-
-function recordPosition (c) {
-  c.data.newPos = c.elm.getBoundingClientRect();
-}
-
-function applyTranslation (c) {
-  var oldPos = c.data.pos;
-  var newPos = c.data.newPos;
-  var dx = oldPos.left - newPos.left;
-  var dy = oldPos.top - newPos.top;
-  if (dx || dy) {
-    c.data.moved = true;
-    var s = c.elm.style;
-    s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
-    s.transitionDuration = '0s';
-  }
-}
-
-var platformComponents = {
-  Transition: Transition,
-  TransitionGroup: TransitionGroup
-};
-
-/*  */
-
-// install platform specific utils
-Vue$3.config.mustUseProp = mustUseProp;
-Vue$3.config.isReservedTag = isReservedTag;
-Vue$3.config.isReservedAttr = isReservedAttr;
-Vue$3.config.getTagNamespace = getTagNamespace;
-Vue$3.config.isUnknownElement = isUnknownElement;
-
-// install platform runtime directives & components
-extend(Vue$3.options.directives, platformDirectives);
-extend(Vue$3.options.components, platformComponents);
-
-// install platform patch function
-Vue$3.prototype.__patch__ = inBrowser ? patch : noop;
-
-// public mount method
-Vue$3.prototype.$mount = function (
-  el,
-  hydrating
-) {
-  el = el && inBrowser ? query(el) : undefined;
-  return mountComponent(this, el, hydrating)
-};
-
-// devtools global hook
-/* istanbul ignore next */
-Vue$3.nextTick(function () {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue$3);
-    } else if ("development" !== 'production' && isChrome) {
-      console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
-      );
+
+  function applyTranslation (c) {
+    var oldPos = c.data.pos;
+    var newPos = c.data.newPos;
+    var dx = oldPos.left - newPos.left;
+    var dy = oldPos.top - newPos.top;
+    if (dx || dy) {
+      c.data.moved = true;
+      var s = c.elm.style;
+      s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
+      s.transitionDuration = '0s';
     }
   }
-  if ("development" !== 'production' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
+
+  var platformComponents = {
+    Transition: Transition,
+    TransitionGroup: TransitionGroup
+  };
+
+  /*  */
+
+  // install platform specific utils
+  Vue.config.mustUseProp = mustUseProp;
+  Vue.config.isReservedTag = isReservedTag;
+  Vue.config.isReservedAttr = isReservedAttr;
+  Vue.config.getTagNamespace = getTagNamespace;
+  Vue.config.isUnknownElement = isUnknownElement;
+
+  // install platform runtime directives & components
+  extend(Vue.options.directives, platformDirectives);
+  extend(Vue.options.components, platformComponents);
+
+  // install platform patch function
+  Vue.prototype.__patch__ = inBrowser ? patch : noop;
+
+  // public mount method
+  Vue.prototype.$mount = function (
+    el,
+    hydrating
   ) {
-    console[console.info ? 'info' : 'log'](
-      "You are running Vue in development mode.\n" +
-      "Make sure to turn on production mode when deploying for production.\n" +
-      "See more tips at https://vuejs.org/guide/deployment.html"
-    );
+    el = el && inBrowser ? query(el) : undefined;
+    return mountComponent(this, el, hydrating)
+  };
+
+  // devtools global hook
+  /* istanbul ignore next */
+  if (inBrowser) {
+    setTimeout(function () {
+      if (config.devtools) {
+        if (devtools) {
+          devtools.emit('init', Vue);
+        } else {
+          console[console.info ? 'info' : 'log'](
+            'Download the Vue Devtools extension for a better development experience:\n' +
+            'https://github.com/vuejs/vue-devtools'
+          );
+        }
+      }
+      if (config.productionTip !== false &&
+        typeof console !== 'undefined'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          "You are running Vue in development mode.\n" +
+          "Make sure to turn on production mode when deploying for production.\n" +
+          "See more tips at https://vuejs.org/guide/deployment.html"
+        );
+      }
+    }, 0);
   }
-}, 0);
 
-/*  */
+  /*  */
 
-return Vue$3;
+  return Vue;
 
-})));
+}));
diff --git a/dist/vue.runtime.min.js b/dist/vue.runtime.min.js
index 7940a211557..ad3cd68f2c1 100644
--- a/dist/vue.runtime.min.js
+++ b/dist/vue.runtime.min.js
@@ -1,6 +1,6 @@
 /*!
- * Vue.js v2.5.13
- * (c) 2014-2017 Evan You
+ * Vue.js v2.6.14
+ * (c) 2014-2021 Evan You
  * Released under the MIT License.
  */
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.Vue=e()}(this,function(){"use strict";function t(t){return void 0===t||null===t}function e(t){return void 0!==t&&null!==t}function n(t){return!0===t}function r(t){return"string"==typeof t||"number"==typeof t||"symbol"==typeof t||"boolean"==typeof t}function i(t){return null!==t&&"object"==typeof t}function o(t){return"[object Object]"===Ve.call(t)}function a(t){var e=parseFloat(String(t));return e>=0&&Math.floor(e)===e&&isFinite(t)}function s(t){return null==t?"":"object"==typeof t?JSON.stringify(t,null,2):String(t)}function c(t){var e=parseFloat(t);return isNaN(e)?t:e}function u(t,e){for(var n=Object.create(null),r=t.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return e?function(t){return n[t.toLowerCase()]}:function(t){return n[t]}}function l(t,e){if(t.length){var n=t.indexOf(e);if(n>-1)return t.splice(n,1)}}function f(t,e){return He.call(t,e)}function 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po={inserted:function(t,e,n,r){"select"===n.tag?(r.elm&&!r.elm._vOptions?re(n,"postpatch",function(){po.componentUpdated(t,e,n)}):vo(t,e,n.context),t._vOptions=[].map.call(t.options,yo)):("textarea"===n.tag||Xn(t.type))&&(t._vModifiers=e.modifiers,e.modifiers.lazy||(t.addEventListener("compositionstart",go),t.addEventListener("compositionend",_o),t.addEventListener("change",_o),q&&(t.vmodel=!0)))},componentUpdated:function(t,e,n){if("select"===n.tag){vo(t,e,n.context);var r=t._vOptions,o=t._vOptions=[].map.call(t.options,yo);if(o.some(function(t,e){return!T(t,r[e])}))(t.multiple?e.value.some(function(t){return mo(t,o)}):e.value!==e.oldValue&&mo(e.value,o))&&bo(t,"change")}}};function vo(t,e,n){ho(t,e,n),(W||K)&&setTimeout(function(){ho(t,e,n)},0)}function ho(t,e,n){var r=e.value,o=t.multiple;if(!o||Array.isArray(r)){for(var i,a,s=0,c=t.options.length;s<c;s++)if(a=t.options[s],o)i=j(r,yo(a))>-1,a.selected!==i&&(a.selected=i);else if(T(yo(a),r))return 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diff --git a/examples/commits/app.js b/examples/commits/app.js
index 029d660a538..fbbd0d53034 100644
--- a/examples/commits/app.js
+++ b/examples/commits/app.js
@@ -1,10 +1,12 @@
+/* global Vue */
+
 var apiURL = 'https://api.github.com/repos/vuejs/vue/commits?per_page=3&sha='
 
 /**
  * Actual demo
  */
 
-var demo = new Vue({
+new Vue({
 
   el: '#demo',
 
@@ -34,14 +36,21 @@ var demo = new Vue({
 
   methods: {
     fetchData: function () {
-      var xhr = new XMLHttpRequest()
       var self = this
-      xhr.open('GET', apiURL + self.currentBranch)
-      xhr.onload = function () {
-        self.commits = JSON.parse(xhr.responseText)
-        console.log(self.commits[0].html_url)
+      if (navigator.userAgent.indexOf('PhantomJS') > -1) {
+        // use mocks in e2e to avoid dependency on network / authentication
+        setTimeout(function () {
+          self.commits = window.MOCKS[self.currentBranch]
+        }, 0)
+      } else {
+        var xhr = new XMLHttpRequest()
+        xhr.open('GET', apiURL + self.currentBranch)
+        xhr.onload = function () {
+          self.commits = JSON.parse(xhr.responseText)
+          console.log(self.commits[0].html_url)
+        }
+        xhr.send()
       }
-      xhr.send()
     }
   }
 })
diff --git a/examples/commits/index.html b/examples/commits/index.html
index 0b355a28748..c1e2e325db6 100644
--- a/examples/commits/index.html
+++ b/examples/commits/index.html
@@ -42,6 +42,7 @@ <h1>Latest Vue.js Commits</h1>
         </li>
       </ul>
     </div>
+    <script src="mock.js"></script>
     <script src="app.js"></script>
   </body>
 </html>
diff --git a/examples/commits/mock.js b/examples/commits/mock.js
new file mode 100644
index 00000000000..0e22a088686
--- /dev/null
+++ b/examples/commits/mock.js
@@ -0,0 +1,575 @@
+window.MOCKS = {
+  master: [
+    {
+      sha: "0948d999f2fddf9f90991956493f976273c5da1f",
+      node_id:
+        "MDY6Q29tbWl0MTE3MzAzNDI6MDk0OGQ5OTlmMmZkZGY5ZjkwOTkxOTU2NDkzZjk3NjI3M2M1ZGExZg==",
+      commit: {
+        author: {
+          name: "Evan You",
+          email: "yyx990803@gmail.com",
+          date: "2017-10-13T03:07:14Z"
+        },
+        committer: {
+          name: "Evan You",
+          email: "yyx990803@gmail.com",
+          date: "2017-10-13T03:07:14Z"
+        },
+        message: "build: release 2.5.0",
+        tree: {
+          sha: "7846816b875eb664ddf718fad04a720efeac72d0",
+          url:
+            "https://api.github.com/repos/vuejs/vue/git/trees/7846816b875eb664ddf718fad04a720efeac72d0"
+        },
+        url:
+          "https://api.github.com/repos/vuejs/vue/git/commits/0948d999f2fddf9f90991956493f976273c5da1f",
+        comment_count: 0,
+        verification: {
+          verified: false,
+          reason: "unsigned",
+          signature: null,
+          payload: null
+        }
+      },
+      url:
+        "https://api.github.com/repos/vuejs/vue/commits/0948d999f2fddf9f90991956493f976273c5da1f",
+      html_url:
+        "https://github.com/vuejs/vue/commit/0948d999f2fddf9f90991956493f976273c5da1f",
+      comments_url:
+        "https://api.github.com/repos/vuejs/vue/commits/0948d999f2fddf9f90991956493f976273c5da1f/comments",
+      author: {
+        login: "yyx990803",
+        id: 499550,
+        node_id: "MDQ6VXNlcjQ5OTU1MA==",
+        avatar_url: "https://avatars1.githubusercontent.com/u/499550?v=4",
+        gravatar_id: "",
+        url: "https://api.github.com/users/yyx990803",
+        html_url: "https://github.com/yyx990803",
+        followers_url: "https://api.github.com/users/yyx990803/followers",
+        following_url:
+          "https://api.github.com/users/yyx990803/following{/other_user}",
+        gists_url: "https://api.github.com/users/yyx990803/gists{/gist_id}",
+        starred_url:
+          "https://api.github.com/users/yyx990803/starred{/owner}{/repo}",
+        subscriptions_url:
+          "https://api.github.com/users/yyx990803/subscriptions",
+        organizations_url: "https://api.github.com/users/yyx990803/orgs",
+        repos_url: "https://api.github.com/users/yyx990803/repos",
+        events_url: "https://api.github.com/users/yyx990803/events{/privacy}",
+        received_events_url:
+          "https://api.github.com/users/yyx990803/received_events",
+        type: "User",
+        site_admin: false
+      },
+      committer: {
+        login: "yyx990803",
+        id: 499550,
+        node_id: "MDQ6VXNlcjQ5OTU1MA==",
+        avatar_url: "https://avatars1.githubusercontent.com/u/499550?v=4",
+        gravatar_id: "",
+        url: "https://api.github.com/users/yyx990803",
+        html_url: "https://github.com/yyx990803",
+        followers_url: "https://api.github.com/users/yyx990803/followers",
+        following_url:
+          "https://api.github.com/users/yyx990803/following{/other_user}",
+        gists_url: "https://api.github.com/users/yyx990803/gists{/gist_id}",
+        starred_url:
+          "https://api.github.com/users/yyx990803/starred{/owner}{/repo}",
+        subscriptions_url:
+          "https://api.github.com/users/yyx990803/subscriptions",
+        organizations_url: "https://api.github.com/users/yyx990803/orgs",
+        repos_url: "https://api.github.com/users/yyx990803/repos",
+        events_url: "https://api.github.com/users/yyx990803/events{/privacy}",
+        received_events_url:
+          "https://api.github.com/users/yyx990803/received_events",
+        type: "User",
+        site_admin: false
+      },
+      parents: [
+        {
+          sha: "bc2918f0e596d0e133a25606cbb66075402ce6c3",
+          url:
+            "https://api.github.com/repos/vuejs/vue/commits/bc2918f0e596d0e133a25606cbb66075402ce6c3",
+          html_url:
+            "https://github.com/vuejs/vue/commit/bc2918f0e596d0e133a25606cbb66075402ce6c3"
+        }
+      ]
+    },
+    {
+      sha: "bc2918f0e596d0e133a25606cbb66075402ce6c3",
+      node_id:
+        "MDY6Q29tbWl0MTE3MzAzNDI6YmMyOTE4ZjBlNTk2ZDBlMTMzYTI1NjA2Y2JiNjYwNzU0MDJjZTZjMw==",
+      commit: {
+        author: {
+          name: "Evan You",
+          email: "yyx990803@gmail.com",
+          date: "2017-10-13T03:04:35Z"
+        },
+        committer: {
+          name: "Evan You",
+          email: "yyx990803@gmail.com",
+          date: "2017-10-13T03:04:35Z"
+        },
+        message: "build: build 2.5.0",
+        tree: {
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+          url:
+            "https://api.github.com/repos/vuejs/vue/commits/6980035a86cfb79368af77a5040e468177d6b14a",
+          html_url:
+            "https://github.com/vuejs/vue/commit/6980035a86cfb79368af77a5040e468177d6b14a"
+        }
+      ]
+    }
+  ]
+};
diff --git a/examples/firebase/index.html b/examples/firebase/index.html
index 5b1cf3d4a5e..7bab1a70b55 100644
--- a/examples/firebase/index.html
+++ b/examples/firebase/index.html
@@ -21,8 +21,8 @@
         </li>
       </ul>
       <form id="form" v-on:submit.prevent="addUser">
-        <input v-model="newUser.name">
-        <input v-model="newUser.email">
+        <input v-model="newUser.name" placeholder="Add Name">
+        <input v-model="newUser.email" placeholder="Add Email">
         <input type="submit" value="Add User">
       </form>
       <ul class="errors">
diff --git a/examples/modal/index.html b/examples/modal/index.html
index e2121617646..34b4ebb1d2b 100644
--- a/examples/modal/index.html
+++ b/examples/modal/index.html
@@ -10,7 +10,7 @@
   <body>
     <!-- template for the modal component -->
     <script type="text/x-template" id="modal-template">
-      <transition name="modal">
+      <transition name="modal" appear>
         <div class="modal-mask">
           <div class="modal-wrapper">
             <div class="modal-container">
diff --git a/examples/todomvc/app.js b/examples/todomvc/app.js
index f8bfeb1ea61..7a1a65486a3 100644
--- a/examples/todomvc/app.js
+++ b/examples/todomvc/app.js
@@ -55,7 +55,7 @@ var app = new Vue({
   },
 
   // computed properties
-  // https://vuejs.org/guide/computed.html
+  // https://v2.vuejs.org/v2/guide/computed.html
   computed: {
     filteredTodos: function () {
       return filters[this.visibility](this.todos)
@@ -129,7 +129,7 @@ var app = new Vue({
 
   // a custom directive to wait for the DOM to be updated
   // before focusing on the input field.
-  // https://vuejs.org/guide/custom-directive.html
+  // https://v2.vuejs.org/v2/guide/custom-directive.html
   directives: {
     'todo-focus': function (el, binding) {
       if (binding.value) {
diff --git a/flow/compiler.js b/flow/compiler.js
index a3dc1c920fd..ad09a2e2ebe 100644
--- a/flow/compiler.js
+++ b/flow/compiler.js
@@ -6,7 +6,8 @@ declare type CompilerOptions = {
   isUnaryTag?: (tag: string) => ?boolean; // check if a tag is unary for the platform
   canBeLeftOpenTag?: (tag: string) => ?boolean; // check if a tag can be left opened
   isReservedTag?: (tag: string) => ?boolean; // check if a tag is a native for the platform
-  preserveWhitespace?: boolean; // preserve whitespace between elements?
+  preserveWhitespace?: boolean; // preserve whitespace between elements? (Deprecated)
+  whitespace?: 'preserve' | 'condense'; // whitespace handling strategy
   optimize?: boolean; // optimize static content?
 
   // web specific
@@ -18,6 +19,7 @@ declare type CompilerOptions = {
   shouldDecodeTags?: boolean;
   shouldDecodeNewlines?:  boolean;
   shouldDecodeNewlinesForHref?: boolean;
+  outputSourceRange?: boolean;
 
   // runtime user-configurable
   delimiters?: [string, string]; // template delimiters
@@ -27,13 +29,19 @@ declare type CompilerOptions = {
   scopeId?: string;
 };
 
+declare type WarningMessage = {
+  msg: string;
+  start?: number;
+  end?: number;
+};
+
 declare type CompiledResult = {
   ast: ?ASTElement;
   render: string;
   staticRenderFns: Array<string>;
   stringRenderFns?: Array<string>;
-  errors?: Array<string>;
-  tips?: Array<string>;
+  errors?: Array<string | WarningMessage>;
+  tips?: Array<string | WarningMessage>;
 };
 
 declare type ModuleOptions = {
@@ -54,10 +62,21 @@ declare type ASTModifiers = { [key: string]: boolean };
 declare type ASTIfCondition = { exp: ?string; block: ASTElement };
 declare type ASTIfConditions = Array<ASTIfCondition>;
 
+declare type ASTAttr = {
+  name: string;
+  value: any;
+  dynamic?: boolean;
+  start?: number;
+  end?: number
+};
+
 declare type ASTElementHandler = {
   value: string;
   params?: Array<any>;
   modifiers: ?ASTModifiers;
+  dynamic?: boolean;
+  start?: number;
+  end?: number;
 };
 
 declare type ASTElementHandlers = {
@@ -69,7 +88,10 @@ declare type ASTDirective = {
   rawName: string;
   value: string;
   arg: ?string;
+  isDynamicArg: boolean;
   modifiers: ?ASTModifiers;
+  start?: number;
+  end?: number;
 };
 
 declare type ASTNode = ASTElement | ASTText | ASTExpression;
@@ -77,11 +99,15 @@ declare type ASTNode = ASTElement | ASTText | ASTExpression;
 declare type ASTElement = {
   type: 1;
   tag: string;
-  attrsList: Array<{ name: string; value: any }>;
+  attrsList: Array<ASTAttr>;
   attrsMap: { [key: string]: any };
+  rawAttrsMap: { [key: string]: ASTAttr };
   parent: ASTElement | void;
   children: Array<ASTNode>;
 
+  start?: number;
+  end?: number;
+
   processed?: true;
 
   static?: boolean;
@@ -91,8 +117,9 @@ declare type ASTElement = {
   hasBindings?: boolean;
 
   text?: string;
-  attrs?: Array<{ name: string; value: any }>;
-  props?: Array<{ name: string; value: string }>;
+  attrs?: Array<ASTAttr>;
+  dynamicAttrs?: Array<ASTAttr>;
+  props?: Array<ASTAttr>;
   plain?: boolean;
   pre?: true;
   ns?: string;
@@ -102,6 +129,7 @@ declare type ASTElement = {
   transitionMode?: string | null;
   slotName?: ?string;
   slotTarget?: ?string;
+  slotTargetDynamic?: boolean;
   slotScope?: ?string;
   scopedSlots?: { [name: string]: ASTElement };
 
@@ -160,6 +188,8 @@ declare type ASTExpression = {
   static?: boolean;
   // 2.4 ssr optimization
   ssrOptimizability?: number;
+  start?: number;
+  end?: number;
 };
 
 declare type ASTText = {
@@ -169,17 +199,20 @@ declare type ASTText = {
   isComment?: boolean;
   // 2.4 ssr optimization
   ssrOptimizability?: number;
+  start?: number;
+  end?: number;
 };
 
 // SFC-parser related declarations
 
-// an object format describing a single-file component.
+// an object format describing a single-file component
 declare type SFCDescriptor = {
   template: ?SFCBlock;
   script: ?SFCBlock;
   styles: Array<SFCBlock>;
   customBlocks: Array<SFCBlock>;
-};
+  errors: Array<string | WarningMessage>;
+}
 
 declare type SFCBlock = {
   type: string;
diff --git a/flow/component.js b/flow/component.js
index e3326bd3d0e..0dc67a48a3e 100644
--- a/flow/component.js
+++ b/flow/component.js
@@ -16,6 +16,8 @@ declare interface Component {
   static directive: (id: string, def?: Function | Object) => Function | Object | void;
   static component: (id: string, def?: Class<Component> | Object) => Class<Component>;
   static filter: (id: string, def?: Function) => Function | void;
+  // functional context constructor
+  static FunctionalRenderContext: Function;
 
   // public properties
   $el: any; // so that we can attach __vue__ to it
diff --git a/flow/global-api.js b/flow/global-api.js
index 0b2efb23ac3..0ce54fda3f4 100644
--- a/flow/global-api.js
+++ b/flow/global-api.js
@@ -8,14 +8,16 @@ declare interface GlobalAPI {
   set: <T>(target: Object | Array<T>, key: string | number, value: T) => T;
   delete: <T>(target: Object| Array<T>, key: string | number) => void;
   nextTick: (fn: Function, context?: Object) => void | Promise<*>;
-  use: (plugin: Function | Object) => void;
-  mixin: (mixin: Object) => void;
+  use: (plugin: Function | Object) => GlobalAPI;
+  mixin: (mixin: Object) => GlobalAPI;
   compile: (template: string) => { render: Function, staticRenderFns: Array<Function> };
 
   directive: (id: string, def?: Function | Object) => Function | Object | void;
   component: (id: string, def?: Class<Component> | Object) => Class<Component>;
   filter: (id: string, def?: Function) => Function | void;
 
+  observable: <T>(value: T) => T;
+
   // allow dynamic method registration
   [key: string]: any
 };
diff --git a/flow/options.js b/flow/options.js
index e4c6ed1f968..09bd93f5d24 100644
--- a/flow/options.js
+++ b/flow/options.js
@@ -2,8 +2,6 @@ declare type InternalComponentOptions = {
   _isComponent: true;
   parent: Component;
   _parentVnode: VNode;
-  _parentElm: ?Node;
-  _refElm: ?Node;
   render?: Function;
   staticRenderFns?: Array<Function>
 };
@@ -46,6 +44,7 @@ declare type ComponentOptions = {
   beforeDestroy?: Function;
   destroyed?: Function;
   errorCaptured?: () => boolean | void;
+  serverPrefetch?: Function;
 
   // assets
   directives?: { [key: string]: Object };
@@ -81,8 +80,6 @@ declare type ComponentOptions = {
   _componentTag: ?string;
   _scopeId: ?string;
   _base: Class<Component>;
-  _parentElm: ?Node;
-  _refElm: ?Node;
 };
 
 declare type PropOptions = {
diff --git a/flow/vnode.js b/flow/vnode.js
index 46fe3deac67..c9f3b3887d3 100644
--- a/flow/vnode.js
+++ b/flow/vnode.js
@@ -42,7 +42,7 @@ declare interface VNodeData {
   staticClass?: string;
   class?: any;
   staticStyle?: { [key: string]: any };
-  style?: Array<Object> | Object;
+  style?: string | Array<Object> | Object;
   normalizedStyle?: Object;
   props?: { [key: string]: any };
   attrs?: { [key: string]: string };
@@ -71,6 +71,7 @@ declare type VNodeDirective = {
   value?: any;
   oldValue?: any;
   arg?: string;
+  oldArg?: string;
   modifiers?: ASTModifiers;
   def?: Object;
 };
diff --git a/flow/weex.js b/flow/weex.js
index 2834313f50e..6d21a57934a 100644
--- a/flow/weex.js
+++ b/flow/weex.js
@@ -28,7 +28,7 @@ declare type WeexEnvironment = {
   appName: string; // mobile app name or browser name
   appVersion: string;
 
-  // informations of current running device
+  // information about current running device
   deviceModel: string; // phone device model
   deviceWidth: number;
   deviceHeight: number;
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 6389efebcce..00000000000
--- a/package-lock.json
+++ /dev/null
@@ -1,10485 +0,0 @@
-{
-  "name": "vue",
-  "version": "2.5.13",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@babel/code-frame": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0-beta.31.tgz",
-      "integrity": "sha512-yd7CkUughvHQoEahQqcMdrZw6o/6PwUxiRkfZuVDVHCDe77mysD/suoNyk5mK6phTnRW1kyIbPHyCJgxw++LXg==",
-      "dev": true,
-      "requires": {
-        "chalk": "2.3.0",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
-      }
-    },
-    "@babel/helper-function-name": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.0.0-beta.31.tgz",
-      "integrity": "sha512-c+DAyp8LMm2nzSs2uXEuxp4LYGSUYEyHtU3fU57avFChjsnTmmpWmXj2dv0yUxHTEydgVAv5fIzA+4KJwoqWDA==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-get-function-arity": "7.0.0-beta.31",
-        "@babel/template": "7.0.0-beta.31",
-        "@babel/traverse": "7.0.0-beta.31",
-        "@babel/types": "7.0.0-beta.31"
-      }
-    },
-    "@babel/helper-get-function-arity": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0-beta.31.tgz",
-      "integrity": "sha512-m7rVVX/dMLbbB9NCzKYRrrFb0qZxgpmQ4Wv6y7zEsB6skoJHRuXVeb/hAFze79vXBbuD63ci7AVHXzAdZSk9KQ==",
-      "dev": true,
-      "requires": {
-        "@babel/types": "7.0.0-beta.31"
-      }
-    },
-    "@babel/template": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.0.0-beta.31.tgz",
-      "integrity": "sha512-97IRmLvoDhIDSQkqklVt3UCxJsv0LUEVb/0DzXWtc8Lgiyxj567qZkmTG9aR21CmcJVVIvq2Y/moZj4oEpl5AA==",
-      "dev": true,
-      "requires": {
-        "@babel/code-frame": "7.0.0-beta.31",
-        "@babel/types": "7.0.0-beta.31",
-        "babylon": "7.0.0-beta.31",
-        "lodash": "4.17.4"
-      },
-      "dependencies": {
-        "babylon": {
-          "version": "7.0.0-beta.31",
-          "resolved": "https://registry.npmjs.org/babylon/-/babylon-7.0.0-beta.31.tgz",
-          "integrity": "sha512-6lm2mV3S51yEnKmQQNnswoABL1U1H1KHoCCVwdwI3hvIv+W7ya4ki7Aw4o4KxtUHjNKkK5WpZb22rrMMOcJXJQ==",
-          "dev": true
-        }
-      }
-    },
-    "@babel/traverse": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.0.0-beta.31.tgz",
-      "integrity": "sha512-3N+VJW+KlezEjFBG7WSYeMyC5kIqVLPb/PGSzCDPFcJrnArluD1GIl7Y3xC7cjKiTq2/JohaLWHVPjJWHlo9Gg==",
-      "dev": true,
-      "requires": {
-        "@babel/code-frame": "7.0.0-beta.31",
-        "@babel/helper-function-name": "7.0.0-beta.31",
-        "@babel/types": "7.0.0-beta.31",
-        "babylon": "7.0.0-beta.31",
-        "debug": "3.1.0",
-        "globals": "10.4.0",
-        "invariant": "2.2.2",
-        "lodash": "4.17.4"
-      },
-      "dependencies": {
-        "babylon": {
-          "version": "7.0.0-beta.31",
-          "resolved": "https://registry.npmjs.org/babylon/-/babylon-7.0.0-beta.31.tgz",
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-          "dev": true
-        },
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-          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        },
-        "globals": {
-          "version": "10.4.0",
-          "resolved": "https://registry.npmjs.org/globals/-/globals-10.4.0.tgz",
-          "integrity": "sha512-uNUtxIZpGyuaq+5BqGGQHsL4wUlJAXRqOm6g3Y48/CWNGTLONgBibI0lh6lGxjR2HljFYUfszb+mk4WkgMntsA==",
-          "dev": true
-        }
-      }
-    },
-    "@babel/types": {
-      "version": "7.0.0-beta.31",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.0.0-beta.31.tgz",
-      "integrity": "sha512-exAHB+NeFGxkfQ5dSUD03xl3zYGneeSk2Mw2ldTt/nTvYxuDiuSp3DlxgUBgzbdTFG4fbwPk0WtKWOoTXCmNGg==",
-      "dev": true,
-      "requires": {
-        "esutils": "2.0.2",
-        "lodash": "4.17.4",
-        "to-fast-properties": "2.0.0"
-      },
-      "dependencies": {
-        "to-fast-properties": {
-          "version": "2.0.0",
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-        }
-      }
-    },
-    "@types/node": {
-      "version": "8.0.58",
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-      "dev": true
-    },
-    "@types/source-map": {
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-      "dev": true
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-    "@types/uglify-js": {
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-      "dev": true,
-      "requires": {
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-      }
-    },
-    "@types/webpack": {
-      "version": "3.8.1",
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-        "@types/tapable": "0.2.4",
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-      "integrity": "sha1-hgbCy/HEJs6MjsABdER/1Jtur8E=",
-      "dev": true
-    },
-    "after": {
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-      "dev": true
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-    "yargs": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
-      "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
-      "dev": true,
-      "requires": {
-        "camelcase": "1.2.1",
-        "cliui": "2.1.0",
-        "decamelize": "1.2.0",
-        "window-size": "0.1.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "1.2.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-          "dev": true
-        }
-      }
-    },
-    "yargs-parser": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-7.0.0.tgz",
-      "integrity": "sha1-jQrELxbqVd69MyyvTEA4s+P139k=",
-      "dev": true,
-      "requires": {
-        "camelcase": "4.1.0"
-      },
-      "dependencies": {
-        "camelcase": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
-          "dev": true
-        }
-      }
-    },
-    "yauzl": {
-      "version": "2.4.1",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
-      "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
-      "dev": true,
-      "requires": {
-        "fd-slicer": "1.0.1"
-      }
-    },
-    "yeast": {
-      "version": "0.1.2",
-      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
-      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk=",
-      "dev": true
-    },
-    "yorkie": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/yorkie/-/yorkie-1.0.1.tgz",
-      "integrity": "sha512-PokRVjgpjjuaIECSDH15OaYzwT04JMnCnikECXX86CthiKUExsmETLVof/XY/c+tGH4nRk8KMjW3cC3fdvnhgA==",
-      "dev": true,
-      "requires": {
-        "execa": "0.8.0",
-        "is-ci": "1.1.0",
-        "normalize-path": "1.0.0",
-        "strip-indent": "2.0.0"
-      },
-      "dependencies": {
-        "execa": {
-          "version": "0.8.0",
-          "resolved": "https://registry.npmjs.org/execa/-/execa-0.8.0.tgz",
-          "integrity": "sha1-2NdrvBtVIX7RkP1t1J08d07PyNo=",
-          "dev": true,
-          "requires": {
-            "cross-spawn": "5.1.0",
-            "get-stream": "3.0.0",
-            "is-stream": "1.1.0",
-            "npm-run-path": "2.0.2",
-            "p-finally": "1.0.0",
-            "signal-exit": "3.0.2",
-            "strip-eof": "1.0.0"
-          }
-        },
-        "normalize-path": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-1.0.0.tgz",
-          "integrity": "sha1-MtDkcvkf80VwHBWoMRAY07CpA3k=",
-          "dev": true
-        },
-        "strip-indent": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/strip-indent/-/strip-indent-2.0.0.tgz",
-          "integrity": "sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g=",
-          "dev": true
-        }
-      }
-    },
-    "zip-stream": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/zip-stream/-/zip-stream-1.2.0.tgz",
-      "integrity": "sha1-qLxF9MG0lpnGuQGYuqyqzbzUugQ=",
-      "dev": true,
-      "requires": {
-        "archiver-utils": "1.3.0",
-        "compress-commons": "1.2.2",
-        "lodash": "4.17.4",
-        "readable-stream": "2.3.3"
-      }
-    }
-  }
-}
diff --git a/package.json b/package.json
index 41f1bcc0d0a..6e793fa5a02 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue",
-  "version": "2.5.13",
+  "version": "2.6.14",
   "description": "Reactive, component-oriented view layer for modern web interfaces.",
   "main": "dist/vue.runtime.common.js",
   "module": "dist/vue.runtime.esm.js",
@@ -12,9 +12,10 @@
     "dist/*.js",
     "types/*.d.ts"
   ],
+  "sideEffects": false,
   "scripts": {
     "dev": "rollup -w -c scripts/config.js --environment TARGET:web-full-dev",
-    "dev:cjs": "rollup -w -c scripts/config.js --environment TARGET:web-runtime-cjs",
+    "dev:cjs": "rollup -w -c scripts/config.js --environment TARGET:web-runtime-cjs-dev",
     "dev:esm": "rollup -w -c scripts/config.js --environment TARGET:web-runtime-esm",
     "dev:test": "karma start test/unit/karma.dev.config.js",
     "dev:ssr": "rollup -w -c scripts/config.js --environment TARGET:web-server-renderer",
@@ -29,11 +30,11 @@
     "test:unit": "karma start test/unit/karma.unit.config.js",
     "test:cover": "karma start test/unit/karma.cover.config.js",
     "test:e2e": "npm run build -- web-full-prod,web-server-basic-renderer && node test/e2e/runner.js",
-    "test:weex": "npm run build:weex && jasmine JASMINE_CONFIG_PATH=test/weex/jasmine.json",
-    "test:ssr": "npm run build:ssr && jasmine JASMINE_CONFIG_PATH=test/ssr/jasmine.json",
+    "test:weex": "npm run build:weex && jasmine JASMINE_CONFIG_PATH=test/weex/jasmine.js",
+    "test:ssr": "npm run build:ssr && jasmine JASMINE_CONFIG_PATH=test/ssr/jasmine.js",
     "test:sauce": "npm run sauce -- 0 && npm run sauce -- 1 && npm run sauce -- 2",
     "test:types": "tsc -p ./types/test/tsconfig.json",
-    "lint": "eslint --fix src scripts test",
+    "lint": "eslint src scripts test",
     "flow": "flow check",
     "sauce": "karma start test/unit/karma.sauce.config.js",
     "bench:ssr": "npm run build:ssr && node benchmarks/ssr/renderToString.js && node benchmarks/ssr/renderToStream.js",
@@ -66,43 +67,44 @@
   },
   "homepage": "https://github.com/vuejs/vue#readme",
   "devDependencies": {
-    "@types/node": "^8.0.33",
-    "@types/webpack": "^3.0.13",
+    "@babel/core": "^7.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.1.0",
+    "@babel/plugin-syntax-dynamic-import": "^7.0.0",
+    "@babel/plugin-syntax-jsx": "^7.0.0",
+    "@babel/plugin-transform-flow-strip-types": "^7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/register": "^7.0.0",
+    "@types/node": "^12.12.0",
+    "@types/webpack": "^4.4.22",
     "acorn": "^5.2.1",
-    "babel-core": "^6.25.0",
-    "babel-eslint": "^8.0.3",
-    "babel-helper-vue-jsx-merge-props": "^2.0.2",
-    "babel-loader": "^7.0.0",
-    "babel-plugin-istanbul": "^4.1.4",
-    "babel-plugin-syntax-dynamic-import": "^6.18.0",
-    "babel-plugin-syntax-jsx": "^6.18.0",
-    "babel-plugin-transform-vue-jsx": "^3.4.3",
-    "babel-preset-es2015": "^6.24.1",
+    "babel-eslint": "^10.0.1",
+    "babel-helper-vue-jsx-merge-props": "^2.0.3",
+    "babel-loader": "^8.0.4",
+    "babel-plugin-istanbul": "^5.1.0",
+    "babel-plugin-transform-vue-jsx": "^4.0.1",
     "babel-preset-flow-vue": "^1.0.0",
-    "buble": "^0.18.0",
+    "buble": "^0.19.3",
     "chalk": "^2.3.0",
-    "chromedriver": "^2.30.1",
-    "codecov.io": "^0.1.6",
+    "chromedriver": "^2.45.0",
+    "codecov": "^3.0.0",
     "commitizen": "^2.9.6",
     "conventional-changelog": "^1.1.3",
-    "cross-spawn": "^5.1.0",
+    "cross-spawn": "^6.0.5",
     "cz-conventional-changelog": "^2.0.0",
     "de-indent": "^1.0.2",
     "es6-promise": "^4.1.0",
     "escodegen": "^1.8.1",
-    "eslint": "^4.13.1",
-    "eslint-loader": "^1.7.1",
+    "eslint": "^5.7.0",
     "eslint-plugin-flowtype": "^2.34.0",
     "eslint-plugin-jasmine": "^2.8.4",
-    "eslint-plugin-vue-libs": "^2.0.1",
-    "file-loader": "^1.1.5",
+    "file-loader": "^3.0.1",
     "flow-bin": "^0.61.0",
     "hash-sum": "^1.0.2",
     "he": "^1.1.1",
-    "http-server": "^0.10.0",
-    "jasmine": "^2.6.0",
-    "jasmine-core": "^2.6.3",
-    "karma": "^1.7.0",
+    "http-server": "^0.12.3",
+    "jasmine": "^2.99.0",
+    "jasmine-core": "^2.99.0",
+    "karma": "^3.1.1",
     "karma-chrome-launcher": "^2.1.1",
     "karma-coverage": "^1.1.1",
     "karma-firefox-launcher": "^1.0.1",
@@ -110,36 +112,35 @@
     "karma-mocha-reporter": "^2.2.3",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-safari-launcher": "^1.0.0",
-    "karma-sauce-launcher": "^1.1.0",
+    "karma-sauce-launcher": "^2.0.2",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^2.0.3",
-    "lint-staged": "^6.0.0",
+    "karma-webpack": "^4.0.0-rc.2",
+    "lint-staged": "^8.0.0",
     "lodash": "^4.17.4",
     "lodash.template": "^4.4.0",
     "lodash.uniq": "^4.5.0",
-    "lru-cache": "^4.1.1",
+    "lru-cache": "^5.1.1",
     "nightwatch": "^0.9.16",
     "nightwatch-helpers": "^1.2.0",
     "phantomjs-prebuilt": "^2.1.14",
+    "puppeteer": "^1.11.0",
     "resolve": "^1.3.3",
-    "rollup": "^0.52.1",
+    "rollup": "^1.0.0",
     "rollup-plugin-alias": "^1.3.1",
-    "rollup-plugin-babel": "^3.0.2",
-    "rollup-plugin-buble": "^0.18.0",
-    "rollup-plugin-commonjs": "^8.0.2",
+    "rollup-plugin-buble": "^0.19.6",
+    "rollup-plugin-commonjs": "^9.2.0",
     "rollup-plugin-flow-no-whitespace": "^1.0.0",
-    "rollup-plugin-node-resolve": "^3.0.0",
+    "rollup-plugin-node-resolve": "^4.0.0",
     "rollup-plugin-replace": "^2.0.0",
-    "rollup-watch": "^4.0.0",
     "selenium-server": "^2.53.1",
-    "serialize-javascript": "^1.3.0",
-    "shelljs": "^0.7.8",
-    "typescript": "^2.6.1",
-    "uglify-js": "^3.0.15",
-    "webpack": "^3.10.0",
-    "weex-js-runtime": "^0.23.5",
+    "serialize-javascript": "^3.1.0",
+    "shelljs": "^0.8.1",
+    "terser": "^3.10.2",
+    "typescript": "^3.6.4",
+    "webpack": "~4.28.4",
+    "weex-js-runtime": "^0.23.6",
     "weex-styler": "^0.3.0",
-    "yorkie": "^1.0.1"
+    "yorkie": "^2.0.0"
   },
   "config": {
     "commitizen": {
diff --git a/packages/vue-server-renderer/basic.js b/packages/vue-server-renderer/basic.js
index 56d94725856..cd1221a5121 100644
--- a/packages/vue-server-renderer/basic.js
+++ b/packages/vue-server-renderer/basic.js
@@ -1,7876 +1,8988 @@
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-	typeof define === 'function' && define.amd ? define(factory) :
-	(global.renderVueComponentToString = factory());
-}(this, (function () { 'use strict';
-
-/*  */
-
-var emptyObject = Object.freeze({});
-
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-function isUndef (v) {
-  return v === undefined || v === null
-}
-
-function isDef (v) {
-  return v !== undefined && v !== null
-}
-
-function isTrue (v) {
-  return v === true
-}
-
-function isFalse (v) {
-  return v === false
-}
-
-/**
- * Check if value is primitive
- */
-function isPrimitive (value) {
-  return (
-    typeof value === 'string' ||
-    typeof value === 'number' ||
-    // $flow-disable-line
-    typeof value === 'symbol' ||
-    typeof value === 'boolean'
-  )
-}
-
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
-
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
-
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
-
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
-
-
-
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
-
-/**
- * Convert a value to a string that is actually rendered.
- */
-function toString (val) {
-  return val == null
-    ? ''
-    : typeof val === 'object'
-      ? JSON.stringify(val, null, 2)
-      : String(val)
-}
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-function toNumber (val) {
-  var n = parseFloat(val);
-  return isNaN(n) ? val : n
-}
-
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
-  }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
-
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
-
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
-
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
-  }
-}
-
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
-
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
-
-/**
- * Capitalize a string.
- */
-var capitalize = cached(function (str) {
-  return str.charAt(0).toUpperCase() + str.slice(1)
-});
-
-/**
- * Hyphenate a camelCase string.
- */
-var hyphenateRE = /\B([A-Z])/g;
-var hyphenate = cached(function (str) {
-  return str.replace(hyphenateRE, '-$1').toLowerCase()
-});
-
-/**
- * Simple bind, faster than native
- */
-
-
-/**
- * Convert an Array-like object to a real Array.
- */
-
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
-  }
-  return to
-}
-
-/**
- * Merge an Array of Objects into a single Object.
- */
-function toObject (arr) {
-  var res = {};
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i]) {
-      extend(res, arr[i]);
-    }
-  }
-  return res
-}
-
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
-
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
-
-/**
- * Generate a static keys string from compiler modules.
- */
-function genStaticKeys (modules) {
-  return modules.reduce(function (keys, m) {
-    return keys.concat(m.staticKeys || [])
-  }, []).join(',')
-}
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-function looseEqual (a, b) {
-  if (a === b) { return true }
-  var isObjectA = isObject(a);
-  var isObjectB = isObject(b);
-  if (isObjectA && isObjectB) {
-    try {
-      var isArrayA = Array.isArray(a);
-      var isArrayB = Array.isArray(b);
-      if (isArrayA && isArrayB) {
-        return a.length === b.length && a.every(function (e, i) {
-          return looseEqual(e, b[i])
-        })
-      } else if (!isArrayA && !isArrayB) {
-        var keysA = Object.keys(a);
-        var keysB = Object.keys(b);
-        return keysA.length === keysB.length && keysA.every(function (key) {
-          return looseEqual(a[key], b[key])
-        })
-      } else {
-        /* istanbul ignore next */
-        return false
-      }
-    } catch (e) {
-      /* istanbul ignore next */
-      return false
-    }
-  } else if (!isObjectA && !isObjectB) {
-    return String(a) === String(b)
-  } else {
-    return false
-  }
-}
-
-function looseIndexOf (arr, val) {
-  for (var i = 0; i < arr.length; i++) {
-    if (looseEqual(arr[i], val)) { return i }
-  }
-  return -1
-}
-
-/**
- * Ensure a function is called only once.
- */
-function once (fn) {
-  var called = false;
-  return function () {
-    if (!called) {
-      called = true;
-      fn.apply(this, arguments);
-    }
-  }
-}
-
-/*  */
-
-var isAttr = makeMap(
-  'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
-  'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
-  'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
-  'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
-  'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
-  'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
-  'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
-  'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
-  'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
-);
-
-/* istanbul ignore next */
-var isRenderableAttr = function (name) {
-  return (
-    isAttr(name) ||
-    name.indexOf('data-') === 0 ||
-    name.indexOf('aria-') === 0
-  )
-};
-var propsToAttrMap = {
-  acceptCharset: 'accept-charset',
-  className: 'class',
-  htmlFor: 'for',
-  httpEquiv: 'http-equiv'
-};
-
-var ESC = {
-  '<': '&lt;',
-  '>': '&gt;',
-  '"': '&quot;',
-  '&': '&amp;'
-};
-
-function escape (s) {
-  return s.replace(/[<>"&]/g, escapeChar)
-}
-
-function escapeChar (a) {
-  return ESC[a] || a
-}
-
-/*  */
-
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
-
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
-
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
-
-
-
-
-
-
-
-var isFalsyAttrValue = function (val) {
-  return val == null || val === false
-};
-
-/*  */
-
-function renderAttrs (node) {
-  var attrs = node.data.attrs;
-  var res = '';
-
-  var opts = node.parent && node.parent.componentOptions;
-  if (isUndef(opts) || opts.Ctor.options.inheritAttrs !== false) {
-    var parent = node.parent;
-    while (isDef(parent)) {
-      if (isDef(parent.data) && isDef(parent.data.attrs)) {
-        attrs = extend(extend({}, attrs), parent.data.attrs);
-      }
-      parent = parent.parent;
-    }
-  }
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+  typeof define === 'function' && define.amd ? define(factory) :
+  (global = global || self, global.renderVueComponentToString = factory());
+}(this, function () { 'use strict';
 
-  if (isUndef(attrs)) {
-    return res
-  }
+  /*  */
 
-  for (var key in attrs) {
-    if (key === 'style') {
-      // leave it to the style module
-      continue
-    }
-    res += renderAttr(key, attrs[key]);
-  }
-  return res
-}
-
-function renderAttr (key, value) {
-  if (isBooleanAttr(key)) {
-    if (!isFalsyAttrValue(value)) {
-      return (" " + key + "=\"" + key + "\"")
-    }
-  } else if (isEnumeratedAttr(key)) {
-    return (" " + key + "=\"" + (isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true') + "\"")
-  } else if (!isFalsyAttrValue(value)) {
-    return (" " + key + "=\"" + (escape(String(value))) + "\"")
-  }
-  return ''
-}
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-var createEmptyVNode = function (text) {
-  if ( text === void 0 ) text = '';
-
-  var node = new VNode();
-  node.text = text;
-  node.isComment = true;
-  return node
-};
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
-  var cloned = new VNode(
-    vnode.tag,
-    vnode.data,
-    vnode.children,
-    vnode.text,
-    vnode.elm,
-    vnode.context,
-    componentOptions,
-    vnode.asyncFactory
-  );
-  cloned.ns = vnode.ns;
-  cloned.isStatic = vnode.isStatic;
-  cloned.key = vnode.key;
-  cloned.isComment = vnode.isComment;
-  cloned.fnContext = vnode.fnContext;
-  cloned.fnOptions = vnode.fnOptions;
-  cloned.fnScopeId = vnode.fnScopeId;
-  cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
-  return cloned
-}
+  var emptyObject = Object.freeze({});
 
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
   }
-  return res
-}
-
-/*  */
 
-function renderDOMProps (node) {
-  var props = node.data.domProps;
-  var res = '';
-
-  var parent = node.parent;
-  while (isDef(parent)) {
-    if (parent.data && parent.data.domProps) {
-      props = extend(extend({}, props), parent.data.domProps);
-    }
-    parent = parent.parent;
+  function isDef (v) {
+    return v !== undefined && v !== null
   }
 
-  if (isUndef(props)) {
-    return res
+  function isTrue (v) {
+    return v === true
   }
 
-  var attrs = node.data.attrs;
-  for (var key in props) {
-    if (key === 'innerHTML') {
-      setText(node, props[key], true);
-    } else if (key === 'textContent') {
-      setText(node, props[key], false);
-    } else if (key === 'value' && node.tag === 'textarea') {
-      setText(node, props[key], false);
-    } else {
-      // $flow-disable-line (WTF?)
-      var attr = propsToAttrMap[key] || key.toLowerCase();
-      if (isRenderableAttr(attr) &&
-        // avoid rendering double-bound props/attrs twice
-        !(isDef(attrs) && isDef(attrs[attr]))
-      ) {
-        res += renderAttr(attr, props[key]);
-      }
-    }
+  function isFalse (v) {
+    return v === false
   }
-  return res
-}
-
-function setText (node, text, raw) {
-  var child = new VNode(undefined, undefined, undefined, text);
-  child.raw = raw;
-  node.children = [child];
-}
-
-/*  */
 
-/**
- * Check if a string starts with $ or _
- */
+  /**
+   * Check if value is primitive.
+   */
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
+  }
 
+  /**
+   * Quick object check - this is primarily used to tell
+   * Objects from primitive values when we know the value
+   * is a JSON-compliant type.
+   */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
+  }
 
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
 
-/*  */
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
+  }
 
+  /**
+   * Strict object type check. Only returns true
+   * for plain JavaScript objects.
+   */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
+  }
 
-// can we use __proto__?
-var hasProto = '__proto__' in {};
+  /**
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
 
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  function isPromise (val) {
+    return (
+      isDef(val) &&
+      typeof val.then === 'function' &&
+      typeof val.catch === 'function'
+    )
+  }
 
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
+  /**
+   * Convert a value to a string that is actually rendered.
+   */
+  function toString (val) {
+    return val == null
+      ? ''
+      : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
+        ? JSON.stringify(val, null, 2)
+        : String(val)
+  }
 
+  /**
+   * Convert an input value to a number for persistence.
+   * If the conversion fails, return original string.
+   */
+  function toNumber (val) {
+    var n = parseFloat(val);
+    return isNaN(n) ? val : n
+  }
 
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
     }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
   }
-  return _isServer
-};
-
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
 
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
 
-var _Set;
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  _Set = Set;
-} else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
-    function Set () {
-      this.set = Object.create(null);
-    }
-    Set.prototype.has = function has (key) {
-      return this.set[key] === true
-    };
-    Set.prototype.add = function add (key) {
-      this.set[key] = true;
-    };
-    Set.prototype.clear = function clear () {
-      this.set = Object.create(null);
-    };
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
-    return Set;
-  }());
-}
-
-var SSR_ATTR = 'data-server-rendered';
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
   /**
-   * Option merge strategies (used in core/util/options)
+   * Remove an item from an array.
    */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
+      }
+    }
+  }
 
   /**
-   * Whether to suppress warnings.
+   * Check whether an object has the property.
    */
-  silent: false,
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
+  }
 
   /**
-   * Show production mode tip message on boot?
+   * Create a cached version of a pure function.
    */
-  productionTip: "development" !== 'production',
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
 
   /**
-   * Whether to enable devtools
+   * Camelize a hyphen-delimited string.
    */
-  devtools: "development" !== 'production',
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
 
   /**
-   * Whether to record perf
+   * Capitalize a string.
    */
-  performance: false,
+  var capitalize = cached(function (str) {
+    return str.charAt(0).toUpperCase() + str.slice(1)
+  });
 
   /**
-   * Error handler for watcher errors
+   * Hyphenate a camelCase string.
    */
-  errorHandler: null,
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
 
   /**
-   * Warn handler for watcher warns
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
    */
-  warnHandler: null,
+
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
+
+    boundFn._length = fn.length;
+    return boundFn
+  }
+
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
+
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
 
   /**
-   * Ignore certain custom elements
+   * Mix properties into target object.
    */
-  ignoredElements: [],
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
 
   /**
-   * Custom user key aliases for v-on
+   * Merge an Array of Objects into a single Object.
    */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
+  function toObject (arr) {
+    var res = {};
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i]) {
+        extend(res, arr[i]);
+      }
+    }
+    return res
+  }
+
+  /* eslint-disable no-unused-vars */
 
   /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
    */
-  isReservedTag: no,
+  function noop (a, b, c) {}
 
   /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
+   * Always return false.
    */
-  isReservedAttr: no,
+  var no = function (a, b, c) { return false; };
+
+  /* eslint-enable no-unused-vars */
 
   /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
+   * Return the same value.
    */
-  isUnknownElement: no,
+  var identity = function (_) { return _; };
 
   /**
-   * Get the namespace of an element
+   * Generate a string containing static keys from compiler modules.
    */
-  getTagNamespace: noop,
+  function genStaticKeys (modules) {
+    return modules.reduce(function (keys, m) {
+      return keys.concat(m.staticKeys || [])
+    }, []).join(',')
+  }
 
   /**
-   * Parse the real tag name for the specific platform.
+   * Check if two values are loosely equal - that is,
+   * if they are plain objects, do they have the same shape?
    */
-  parsePlatformTagName: identity,
+  function looseEqual (a, b) {
+    if (a === b) { return true }
+    var isObjectA = isObject(a);
+    var isObjectB = isObject(b);
+    if (isObjectA && isObjectB) {
+      try {
+        var isArrayA = Array.isArray(a);
+        var isArrayB = Array.isArray(b);
+        if (isArrayA && isArrayB) {
+          return a.length === b.length && a.every(function (e, i) {
+            return looseEqual(e, b[i])
+          })
+        } else if (a instanceof Date && b instanceof Date) {
+          return a.getTime() === b.getTime()
+        } else if (!isArrayA && !isArrayB) {
+          var keysA = Object.keys(a);
+          var keysB = Object.keys(b);
+          return keysA.length === keysB.length && keysA.every(function (key) {
+            return looseEqual(a[key], b[key])
+          })
+        } else {
+          /* istanbul ignore next */
+          return false
+        }
+      } catch (e) {
+        /* istanbul ignore next */
+        return false
+      }
+    } else if (!isObjectA && !isObjectB) {
+      return String(a) === String(b)
+    } else {
+      return false
+    }
+  }
 
   /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
+   * Return the first index at which a loosely equal value can be
+   * found in the array (if value is a plain object, the array must
+   * contain an object of the same shape), or -1 if it is not present.
    */
-  mustUseProp: no,
+  function looseIndexOf (arr, val) {
+    for (var i = 0; i < arr.length; i++) {
+      if (looseEqual(arr[i], val)) { return i }
+    }
+    return -1
+  }
 
   /**
-   * Exposed for legacy reasons
+   * Ensure a function is called only once.
    */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
+  function once (fn) {
+    var called = false;
+    return function () {
+      if (!called) {
+        called = true;
+        fn.apply(this, arguments);
+      }
+    }
+  }
 
-/*  */
+  /*  */
 
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
+  var isAttr = makeMap(
+    'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
+    'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
+    'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+    'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+    'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
+    'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
+    'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
+    'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
+    'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
+    'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
+    'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
+    'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
+    'target,title,usemap,value,width,wrap'
+  );
 
-{
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
+  var unsafeAttrCharRE = /[>/="'\u0009\u000a\u000c\u0020]/; // eslint-disable-line no-control-regex
+  var isSSRUnsafeAttr = function (name) {
+    return unsafeAttrCharRE.test(name)
+  };
 
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
+  /* istanbul ignore next */
+  var isRenderableAttr = function (name) {
+    return (
+      isAttr(name) ||
+      name.indexOf('data-') === 0 ||
+      name.indexOf('aria-') === 0
+    )
+  };
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
-    }
+  var propsToAttrMap = {
+    acceptCharset: 'accept-charset',
+    className: 'class',
+    htmlFor: 'for',
+    httpEquiv: 'http-equiv'
   };
 
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
-    }
+  var ESC = {
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    '&': '&amp;'
   };
 
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
-    }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
-    }
+  function escape (s) {
+    return s.replace(/[<>"&]/g, escapeChar)
+  }
+
+  function escapeChar (a) {
+    return ESC[a] || a
+  }
+
+  var noUnitNumericStyleProps = {
+    "animation-iteration-count": true,
+    "border-image-outset": true,
+    "border-image-slice": true,
+    "border-image-width": true,
+    "box-flex": true,
+    "box-flex-group": true,
+    "box-ordinal-group": true,
+    "column-count": true,
+    "columns": true,
+    "flex": true,
+    "flex-grow": true,
+    "flex-positive": true,
+    "flex-shrink": true,
+    "flex-negative": true,
+    "flex-order": true,
+    "grid-row": true,
+    "grid-row-end": true,
+    "grid-row-span": true,
+    "grid-row-start": true,
+    "grid-column": true,
+    "grid-column-end": true,
+    "grid-column-span": true,
+    "grid-column-start": true,
+    "font-weight": true,
+    "line-clamp": true,
+    "line-height": true,
+    "opacity": true,
+    "order": true,
+    "orphans": true,
+    "tab-size": true,
+    "widows": true,
+    "z-index": true,
+    "zoom": true,
+    // SVG
+    "fill-opacity": true,
+    "flood-opacity": true,
+    "stop-opacity": true,
+    "stroke-dasharray": true,
+    "stroke-dashoffset": true,
+    "stroke-miterlimit": true,
+    "stroke-opacity": true,
+    "stroke-width": true
+  };
+
+  /*  */
 
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
+
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
     return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
     )
   };
 
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
-    }
-    return res
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
+
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+  var convertEnumeratedValue = function (key, value) {
+    return isFalsyAttrValue(value) || value === 'false'
+      ? 'false'
+      // allow arbitrary string value for contenteditable
+      : key === 'contenteditable' && isValidContentEditableValue(value)
+        ? value
+        : 'true'
   };
 
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,' +
+    'truespeed,typemustmatch,visible'
+  );
+
+  var isFalsyAttrValue = function (val) {
+    return val == null || val === false
+  };
+
+  /*  */
+
+  function renderAttrs (node) {
+    var attrs = node.data.attrs;
+    var res = '';
+
+    var opts = node.parent && node.parent.componentOptions;
+    if (isUndef(opts) || opts.Ctor.options.inheritAttrs !== false) {
+      var parent = node.parent;
+      while (isDef(parent)) {
+        // Stop fallthrough in case parent has inheritAttrs option set to false
+        if (parent.componentOptions && parent.componentOptions.Ctor.options.inheritAttrs === false) {
+          break;
+        }
+        if (isDef(parent.data) && isDef(parent.data.attrs)) {
+          attrs = extend(extend({}, attrs), parent.data.attrs);
         }
-        tree.push(vm);
-        vm = vm.$parent;
+        parent = parent.parent;
       }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
     }
-  };
-}
-
-/*  */
-
-
-var uid = 0;
-
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
-
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
 
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
+    if (isUndef(attrs)) {
+      return res
     }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
-
-/*  */
-
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
-
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
-
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
-  }
-};
-
-// helpers
-
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
-
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
-          }
-        }
-      }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
-      }
-      /* eslint-enable no-self-compare */
-      if ("development" !== 'production' && customSetter) {
-        customSetter();
+
+    for (var key in attrs) {
+      if (isSSRUnsafeAttr(key)) {
+        continue
       }
-      if (setter) {
-        setter.call(obj, newVal);
-      } else {
-        val = newVal;
+      if (key === 'style') {
+        // leave it to the style module
+        continue
       }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
+      res += renderAttr(key, attrs[key]);
     }
-  });
-}
-
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
-  }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
-  }
-  if (!ob) {
-    target[key] = val;
-    return val
+    return res
   }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
-
-/**
- * Delete a property and trigger change if necessary.
- */
-
 
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
+  function renderAttr (key, value) {
+    if (isBooleanAttr(key)) {
+      if (!isFalsyAttrValue(value)) {
+        return (" " + key + "=\"" + key + "\"")
+      }
+    } else if (isEnumeratedAttr(key)) {
+      return (" " + key + "=\"" + (escape(convertEnumeratedValue(key, value))) + "\"")
+    } else if (!isFalsyAttrValue(value)) {
+      return (" " + key + "=\"" + (escape(String(value))) + "\"")
     }
+    return ''
   }
-}
 
-/*  */
+  /*  */
+
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
+  };
 
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
+  var prototypeAccessors = { child: { configurable: true } };
 
-/**
- * Options with restrictions
- */
-{
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
-      warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
-      );
-    }
-    return defaultStrat(parent, child)
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
   };
-}
-
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
-    }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
-      } else {
-        return defaultData
-      }
-    }
-  }
-}
 
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      "development" !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
 
-      return parentVal
-    }
-    return mergeDataOrFn(parentVal, childVal)
-  }
-
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
-
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    "development" !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
-  }
-}
-
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
-
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
-  {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && "development" !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-/**
- * Validate component names
- */
-function checkComponents (options) {
-  for (var key in options.components) {
-    validateComponentName(key);
-  }
-}
-
-function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
-    warn(
-      'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
-    );
-  }
-  if (isBuiltInTag(name) || config.isReservedTag(name)) {
-    warn(
-      'Do not use built-in or reserved HTML elements as component ' +
-      'id: ' + name
+  var createEmptyVNode = function (text) {
+    if ( text === void 0 ) text = '';
+
+    var node = new VNode();
+    node.text = text;
+    node.isComment = true;
+    return node
+  };
+
+  function createTextVNode (val) {
+    return new VNode(undefined, undefined, undefined, String(val))
+  }
+
+  // optimized shallow clone
+  // used for static nodes and slot nodes because they may be reused across
+  // multiple renders, cloning them avoids errors when DOM manipulations rely
+  // on their elm reference.
+  function cloneVNode (vnode) {
+    var cloned = new VNode(
+      vnode.tag,
+      vnode.data,
+      // #7975
+      // clone children array to avoid mutating original in case of cloning
+      // a child.
+      vnode.children && vnode.children.slice(),
+      vnode.text,
+      vnode.elm,
+      vnode.context,
+      vnode.componentOptions,
+      vnode.asyncFactory
     );
-  }
-}
-
-/**
- * Ensure all props option syntax are normalized into the
- * Object-based format.
- */
-function normalizeProps (options, vm) {
-  var props = options.props;
-  if (!props) { return }
-  var res = {};
-  var i, val, name;
-  if (Array.isArray(props)) {
-    i = props.length;
-    while (i--) {
-      val = props[i];
-      if (typeof val === 'string') {
-        name = camelize(val);
-        res[name] = { type: null };
-      } else {
-        warn('props must be strings when using array syntax.');
+    cloned.ns = vnode.ns;
+    cloned.isStatic = vnode.isStatic;
+    cloned.key = vnode.key;
+    cloned.isComment = vnode.isComment;
+    cloned.fnContext = vnode.fnContext;
+    cloned.fnOptions = vnode.fnOptions;
+    cloned.fnScopeId = vnode.fnScopeId;
+    cloned.asyncMeta = vnode.asyncMeta;
+    cloned.isCloned = true;
+    return cloned
+  }
+
+  /*  */
+
+  function renderDOMProps (node) {
+    var props = node.data.domProps;
+    var res = '';
+
+    var parent = node.parent;
+    while (isDef(parent)) {
+      if (parent.data && parent.data.domProps) {
+        props = extend(extend({}, props), parent.data.domProps);
       }
+      parent = parent.parent;
     }
-  } else if (isPlainObject(props)) {
-    for (var key in props) {
-      val = props[key];
-      name = camelize(key);
-      res[name] = isPlainObject(val)
-        ? val
-        : { type: val };
-    }
-  } else {
-    warn(
-      "Invalid value for option \"props\": expected an Array or an Object, " +
-      "but got " + (toRawType(props)) + ".",
-      vm
-    );
-  }
-  options.props = res;
-}
-
-/**
- * Normalize all injections into Object-based format
- */
-function normalizeInject (options, vm) {
-  var inject = options.inject;
-  if (!inject) { return }
-  var normalized = options.inject = {};
-  if (Array.isArray(inject)) {
-    for (var i = 0; i < inject.length; i++) {
-      normalized[inject[i]] = { from: inject[i] };
-    }
-  } else if (isPlainObject(inject)) {
-    for (var key in inject) {
-      var val = inject[key];
-      normalized[key] = isPlainObject(val)
-        ? extend({ from: key }, val)
-        : { from: val };
+
+    if (isUndef(props)) {
+      return res
     }
-  } else {
-    warn(
-      "Invalid value for option \"inject\": expected an Array or an Object, " +
-      "but got " + (toRawType(inject)) + ".",
-      vm
-    );
-  }
-}
 
-/**
- * Normalize raw function directives into object format.
- */
-function normalizeDirectives (options) {
-  var dirs = options.directives;
-  if (dirs) {
-    for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+    var attrs = node.data.attrs;
+    for (var key in props) {
+      if (key === 'innerHTML') {
+        setText(node, props[key], true);
+      } else if (key === 'textContent') {
+        setText(node, props[key], false);
+      } else if (key === 'value' && node.tag === 'textarea') {
+        setText(node, toString(props[key]), false);
+      } else {
+        // $flow-disable-line (WTF?)
+        var attr = propsToAttrMap[key] || key.toLowerCase();
+        if (isRenderableAttr(attr) &&
+          // avoid rendering double-bound props/attrs twice
+          !(isDef(attrs) && isDef(attrs[attr]))
+        ) {
+          res += renderAttr(attr, props[key]);
+        }
       }
     }
+    return res
   }
-}
 
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
-  }
-}
-
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-function mergeOptions (
-  parent,
-  child,
-  vm
-) {
-  {
-    checkComponents(child);
+  function setText (node, text, raw) {
+    var child = new VNode(undefined, undefined, undefined, text);
+    child.raw = raw;
+    node.children = [child];
   }
 
-  if (typeof child === 'function') {
-    child = child.options;
-  }
+  /*  */
 
-  normalizeProps(child, vm);
-  normalizeInject(child, vm);
-  normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
-    }
+  /**
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+   */
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+  /**
+   * Define a property.
+   */
+  function def (obj, key, val, enumerable) {
+    Object.defineProperty(obj, key, {
+      value: val,
+      enumerable: !!enumerable,
+      writable: true,
+      configurable: true
+    });
   }
-  var options = {};
-  var key;
-  for (key in parent) {
-    mergeField(key);
+
+  /*  */
+
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
+
+  // Browser environment sniffing
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
+
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
+        }
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
   }
-  for (key in child) {
-    if (!hasOwn(parent, key)) {
-      mergeField(key);
-    }
-  }
-  function mergeField (key) {
-    var strat = strats[key] || defaultStrat;
-    options[key] = strat(parent[key], child[key], vm, key);
-  }
-  return options
-}
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-function resolveAsset (
-  options,
-  type,
-  id,
-  warnMissing
-) {
-  /* istanbul ignore if */
-  if (typeof id !== 'string') {
-    return
-  }
-  var assets = options[type];
-  // check local registration variations first
-  if (hasOwn(assets, id)) { return assets[id] }
-  var camelizedId = camelize(id);
-  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
-  var PascalCaseId = capitalize(camelizedId);
-  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
-  // fallback to prototype chain
-  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if ("development" !== 'production' && warnMissing && !res) {
-    warn(
-      'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
-      options
-    );
-  }
-  return res
-}
-
-/*  */
-
-function validateProp (
-  key,
-  propOptions,
-  propsData,
-  vm
-) {
-  var prop = propOptions[key];
-  var absent = !hasOwn(propsData, key);
-  var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
-    if (absent && !hasOwn(prop, 'default')) {
-      value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
-    }
-  }
-  // check default value
-  if (value === undefined) {
-    value = getPropDefaultValue(vm, prop, key);
-    // since the default value is a fresh copy,
-    // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
-    observe(value);
-    observerState.shouldConvert = prevShouldConvert;
-  }
-  {
-    assertProp(prop, key, value, vm, absent);
-  }
-  return value
-}
-
-/**
- * Get the default value of a prop.
- */
-function getPropDefaultValue (vm, prop, key) {
-  // no default, return undefined
-  if (!hasOwn(prop, 'default')) {
-    return undefined
-  }
-  var def = prop.default;
-  // warn against non-factory defaults for Object & Array
-  if ("development" !== 'production' && isObject(def)) {
-    warn(
-      'Invalid default value for prop "' + key + '": ' +
-      'Props with type Object/Array must use a factory function ' +
-      'to return the default value.',
-      vm
-    );
-  }
-  // the raw prop value was also undefined from previous render,
-  // return previous default value to avoid unnecessary watcher trigger
-  if (vm && vm.$options.propsData &&
-    vm.$options.propsData[key] === undefined &&
-    vm._props[key] !== undefined
-  ) {
-    return vm._props[key]
-  }
-  // call factory function for non-Function types
-  // a value is Function if its prototype is function even across different execution context
-  return typeof def === 'function' && getType(prop.type) !== 'Function'
-    ? def.call(vm)
-    : def
-}
-
-/**
- * Assert whether a prop is valid.
- */
-function assertProp (
-  prop,
-  name,
-  value,
-  vm,
-  absent
-) {
-  if (prop.required && absent) {
-    warn(
-      'Missing required prop: "' + name + '"',
-      vm
-    );
-    return
-  }
-  if (value == null && !prop.required) {
-    return
-  }
-  var type = prop.type;
-  var valid = !type || type === true;
-  var expectedTypes = [];
-  if (type) {
-    if (!Array.isArray(type)) {
-      type = [type];
-    }
-    for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
-      expectedTypes.push(assertedType.expectedType || '');
-      valid = assertedType.valid;
-    }
-  }
-  if (!valid) {
-    warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
-      vm
-    );
-    return
-  }
-  var validator = prop.validator;
-  if (validator) {
-    if (!validator(value)) {
-      warn(
-        'Invalid prop: custom validator check failed for prop "' + name + '".',
-        vm
-      );
-    }
-  }
-}
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
-
-function assertType (value, type) {
-  var valid;
-  var expectedType = getType(type);
-  if (simpleCheckRE.test(expectedType)) {
-    var t = typeof value;
-    valid = t === expectedType.toLowerCase();
-    // for primitive wrapper objects
-    if (!valid && t === 'object') {
-      valid = value instanceof type;
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
+      }
     }
-  } else if (expectedType === 'Object') {
-    valid = isPlainObject(value);
-  } else if (expectedType === 'Array') {
-    valid = Array.isArray(value);
-  } else {
-    valid = value instanceof type;
-  }
-  return {
-    valid: valid,
-    expectedType: expectedType
-  }
-}
+    return _isServer
+  };
 
-/**
- * Use function string name to check built-in types,
- * because a simple equality check will fail when running
- * across different vms / iframes.
- */
-function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
-  return match ? match[1] : ''
-}
+  // detect devtools
+  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
-  }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
-    }
-  }
   /* istanbul ignore next */
-  return false
-}
-
-/*  */
-
-function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
-          }
-        }
-      }
-    }
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
   }
-  globalHandleError(err, vm, info);
-}
 
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
-    }
-  }
-  logError(err, vm, info);
-}
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
 
-function logError (err, vm, info) {
-  {
-    warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
-  }
-  /* istanbul ignore else */
-  if ((inBrowser || inWeex) && typeof console !== 'undefined') {
-    console.error(err);
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
+    // use native Set when available.
+    _Set = Set;
   } else {
-    throw err
-  }
-}
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-function flushCallbacks () {
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  channel.port1.onmessage = flushCallbacks;
-  
-} else {
-  /* istanbul ignore next */
-  
-}
-
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  
-} else {
-  // fallback to macro
-  
-}
+    // a non-standard Set polyfill that only works with primitive keys.
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
+      }
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
+      };
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
+      };
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
+      };
 
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
+      return Set;
+    }());
+  }
 
-/*  */
+  var SSR_ATTR = 'data-server-rendered';
 
-/*  */
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
 
-function genClassForVnode (vnode) {
-  var data = vnode.data;
-  var parentNode = vnode;
-  var childNode = vnode;
-  while (isDef(childNode.componentInstance)) {
-    childNode = childNode.componentInstance._vnode;
-    if (childNode && childNode.data) {
-      data = mergeClassData(childNode.data, data);
-    }
-  }
-  while (isDef(parentNode = parentNode.parent)) {
-    if (parentNode && parentNode.data) {
-      data = mergeClassData(data, parentNode.data);
-    }
-  }
-  return renderClass$1(data.staticClass, data.class)
-}
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
 
-function mergeClassData (child, parent) {
-  return {
-    staticClass: concat(child.staticClass, parent.staticClass),
-    class: isDef(child.class)
-      ? [child.class, parent.class]
-      : parent.class
-  }
-}
+  /*  */
 
-function renderClass$1 (
-  staticClass,
-  dynamicClass
-) {
-  if (isDef(staticClass) || isDef(dynamicClass)) {
-    return concat(staticClass, stringifyClass(dynamicClass))
-  }
-  /* istanbul ignore next */
-  return ''
-}
 
-function concat (a, b) {
-  return a ? b ? (a + ' ' + b) : a : (b || '')
-}
 
-function stringifyClass (value) {
-  if (Array.isArray(value)) {
-    return stringifyArray(value)
-  }
-  if (isObject(value)) {
-    return stringifyObject(value)
-  }
-  if (typeof value === 'string') {
-    return value
-  }
-  /* istanbul ignore next */
-  return ''
-}
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
+  });
 
-function stringifyArray (value) {
-  var res = '';
-  var stringified;
-  for (var i = 0, l = value.length; i < l; i++) {
-    if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
-      if (res) { res += ' '; }
-      res += stringified;
-    }
-  }
-  return res
-}
+  /*  */
 
-function stringifyObject (value) {
-  var res = '';
-  for (var key in value) {
-    if (value[key]) {
-      if (res) { res += ' '; }
-      res += key;
-    }
-  }
-  return res
-}
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
 
-/*  */
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
 
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
 
+      if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
+      }
+    };
 
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
+    };
 
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
 
-var isPreTag = function (tag) { return tag === 'pre'; };
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
+    };
 
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
+    };
 
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
+          }
+          tree.push(vm);
+          vm = vm.$parent;
+        }
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
+      } else {
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+      }
+    };
   }
-}
 
+  /*  */
 
+  var uid = 0;
 
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+  /**
+   * A dep is an observable that can have multiple
+   * directives subscribing to it.
+   */
+  var Dep = function Dep () {
+    this.id = uid++;
+    this.subs = [];
+  };
 
-/*  */
+  Dep.prototype.addSub = function addSub (sub) {
+    this.subs.push(sub);
+  };
 
-/**
- * Query an element selector if it's not an element already.
- */
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
+  };
 
-/*  */
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
+    }
+  };
 
-function renderClass (node) {
-  var classList = genClassForVnode(node);
-  if (classList !== '') {
-    return (" class=\"" + (escape(classList)) + "\"")
-  }
-}
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    for (var i = 0, l = subs.length; i < l; i++) {
+      subs[i].update();
+    }
+  };
 
-/*  */
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+  var targetStack = [];
 
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
-    }
-  });
-  return res
-});
-
-// merge static and dynamic style data on the same vnode
-function normalizeStyleData (data) {
-  var style = normalizeStyleBinding(data.style);
-  // static style is pre-processed into an object during compilation
-  // and is always a fresh object, so it's safe to merge into it
-  return data.staticStyle
-    ? extend(data.staticStyle, style)
-    : style
-}
-
-// normalize possible array / string values into Object
-function normalizeStyleBinding (bindingStyle) {
-  if (Array.isArray(bindingStyle)) {
-    return toObject(bindingStyle)
-  }
-  if (typeof bindingStyle === 'string') {
-    return parseStyleText(bindingStyle)
-  }
-  return bindingStyle
-}
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-function getStyle (vnode, checkChild) {
-  var res = {};
-  var styleData;
-
-  if (checkChild) {
-    var childNode = vnode;
-    while (childNode.componentInstance) {
-      childNode = childNode.componentInstance._vnode;
-      if (
-        childNode && childNode.data &&
-        (styleData = normalizeStyleData(childNode.data))
-      ) {
-        extend(res, styleData);
-      }
-    }
+  function pushTarget (target) {
+    targetStack.push(target);
+    Dep.target = target;
   }
 
-  if ((styleData = normalizeStyleData(vnode.data))) {
-    extend(res, styleData);
+  function popTarget () {
+    targetStack.pop();
+    Dep.target = targetStack[targetStack.length - 1];
   }
 
-  var parentNode = vnode;
-  while ((parentNode = parentNode.parent)) {
-    if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
-      extend(res, styleData);
-    }
-  }
-  return res
-}
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
+   */
 
-/*  */
+  var arrayProto = Array.prototype;
+  var arrayMethods = Object.create(arrayProto);
 
-function genStyle (style) {
-  var styleText = '';
-  for (var key in style) {
-    var value = style[key];
-    var hyphenatedKey = hyphenate(key);
-    if (Array.isArray(value)) {
-      for (var i = 0, len = value.length; i < len; i++) {
-        styleText += hyphenatedKey + ":" + (value[i]) + ";";
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
+
+  /**
+   * Intercept mutating methods and emit events
+   */
+  methodsToPatch.forEach(function (method) {
+    // cache original method
+    var original = arrayProto[method];
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
+      var result = original.apply(this, args);
+      var ob = this.__ob__;
+      var inserted;
+      switch (method) {
+        case 'push':
+        case 'unshift':
+          inserted = args;
+          break
+        case 'splice':
+          inserted = args.slice(2);
+          break
       }
-    } else {
-      styleText += hyphenatedKey + ":" + value + ";";
-    }
-  }
-  return styleText
-}
+      if (inserted) { ob.observeArray(inserted); }
+      // notify change
+      ob.dep.notify();
+      return result
+    });
+  });
 
-function renderStyle (vnode) {
-  var styleText = genStyle(getStyle(vnode, false));
-  if (styleText !== '') {
-    return (" style=" + (JSON.stringify(escape(styleText))))
-  }
-}
+  /*  */
 
-var modules = [
-  renderAttrs,
-  renderDOMProps,
-  renderClass,
-  renderStyle
-];
+  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
-/*  */
+  /**
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
+   */
+  var shouldObserve = true;
 
-function show (node, dir) {
-  if (!dir.value) {
-    var style = node.data.style || (node.data.style = {});
-    style.display = 'none';
+  function toggleObserving (value) {
+    shouldObserve = value;
   }
-}
 
-/*  */
-
-// this is only applied for <select v-model> because it is the only edge case
-// that must be done at runtime instead of compile time.
-function model (node, dir) {
-  if (!node.children) { return }
-  var value = dir.value;
-  var isMultiple = node.data.attrs && node.data.attrs.multiple;
-  for (var i = 0, l = node.children.length; i < l; i++) {
-    var option = node.children[i];
-    if (option.tag === 'option') {
-      if (isMultiple) {
-        var selected =
-          Array.isArray(value) &&
-          (looseIndexOf(value, getValue(option)) > -1);
-        if (selected) {
-          setSelected(option);
-        }
+  /**
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
+   * object's property keys into getter/setters that
+   * collect dependencies and dispatch updates.
+   */
+  var Observer = function Observer (value) {
+    this.value = value;
+    this.dep = new Dep();
+    this.vmCount = 0;
+    def(value, '__ob__', this);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
       } else {
-        if (looseEqual(value, getValue(option))) {
-          setSelected(option);
-          return
-        }
+        copyAugment(value, arrayMethods, arrayKeys);
       }
+      this.observeArray(value);
+    } else {
+      this.walk(value);
     }
-  }
-}
-
-function getValue (option) {
-  var data = option.data || {};
-  return (
-    (data.attrs && data.attrs.value) ||
-    (data.domProps && data.domProps.value) ||
-    (option.children && option.children[0] && option.children[0].text)
-  )
-}
-
-function setSelected (option) {
-  var data = option.data || (option.data = {});
-  var attrs = data.attrs || (data.attrs = {});
-  attrs.selected = '';
-}
-
-var directives = {
-  show: show,
-  model: model
-};
-
-/*  */
-
-var isUnaryTag = makeMap(
-  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
-  'link,meta,param,source,track,wbr'
-);
-
-// Elements that you can, intentionally, leave open
-// (and which close themselves)
-var canBeLeftOpenTag = makeMap(
-  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
-);
-
-// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
-// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
-var isNonPhrasingTag = makeMap(
-  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
-  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
-  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
-  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
-  'title,tr,track'
-);
-
-/*  */
-
-var MAX_STACK_DEPTH = 1000;
-var noop$1 = function (_) { return _; };
-
-var defer = typeof process !== 'undefined' && process.nextTick
-  ? process.nextTick
-  : typeof Promise !== 'undefined'
-    ? function (fn) { return Promise.resolve().then(fn); }
-    : typeof setTimeout !== 'undefined'
-      ? setTimeout
-      : noop$1;
-
-if (defer === noop$1) {
-  throw new Error(
-    'Your JavaScript runtime does not support any asynchronous primitives ' +
-    'that are required by vue-server-renderer. Please use a polyfill for ' +
-    'either Promise or setTimeout.'
-  )
-}
-
-function createWriteFunction (
-  write,
-  onError
-) {
-  var stackDepth = 0;
-  var cachedWrite = function (text, next) {
-    if (text && cachedWrite.caching) {
-      cachedWrite.cacheBuffer[cachedWrite.cacheBuffer.length - 1] += text;
-    }
-    var waitForNext = write(text, next);
-    if (waitForNext !== true) {
-      if (stackDepth >= MAX_STACK_DEPTH) {
-        defer(function () {
-          try { next(); } catch (e) {
-            onError(e);
-          }
-        });
-      } else {
-        stackDepth++;
-        next();
-        stackDepth--;
-      }
+  };
+
+  /**
+   * Walk through all properties and convert them into
+   * getter/setters. This method should only be called when
+   * value type is Object.
+   */
+  Observer.prototype.walk = function walk (obj) {
+    var keys = Object.keys(obj);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
     }
   };
-  cachedWrite.caching = false;
-  cachedWrite.cacheBuffer = [];
-  cachedWrite.componentBuffer = [];
-  return cachedWrite
-}
-
-/*  */
-
-var RenderContext = function RenderContext (options) {
-  this.userContext = options.userContext;
-  this.activeInstance = options.activeInstance;
-  this.renderStates = [];
-
-  this.write = options.write;
-  this.done = options.done;
-  this.renderNode = options.renderNode;
-
-  this.isUnaryTag = options.isUnaryTag;
-  this.modules = options.modules;
-  this.directives = options.directives;
-
-  var cache = options.cache;
-  if (cache && (!cache.get || !cache.set)) {
-    throw new Error('renderer cache must implement at least get & set.')
-  }
-  this.cache = cache;
-  this.get = cache && normalizeAsync(cache, 'get');
-  this.has = cache && normalizeAsync(cache, 'has');
-
-  this.next = this.next.bind(this);
-};
-
-RenderContext.prototype.next = function next () {
-  var lastState = this.renderStates[this.renderStates.length - 1];
-  if (isUndef(lastState)) {
-    return this.done()
-  }
-  switch (lastState.type) {
-    case 'Element':
-      var children = lastState.children;
-    var total = lastState.total;
-      var rendered = lastState.rendered++;
-      if (rendered < total) {
-        this.renderNode(children[rendered], false, this);
-      } else {
-        this.renderStates.pop();
-        this.write(lastState.endTag, this.next);
-      }
-      break
-    case 'Component':
-      this.renderStates.pop();
-      this.activeInstance = lastState.prevActive;
-      this.next();
-      break
-    case 'ComponentWithCache':
-      this.renderStates.pop();
-      var buffer = lastState.buffer;
-    var bufferIndex = lastState.bufferIndex;
-    var componentBuffer = lastState.componentBuffer;
-    var key = lastState.key;
-      var result = {
-        html: buffer[bufferIndex],
-        components: componentBuffer[bufferIndex]
-      };
-      this.cache.set(key, result);
-      if (bufferIndex === 0) {
-        // this is a top-level cached component,
-        // exit caching mode.
-        this.write.caching = false;
-      } else {
-        // parent component is also being cached,
-        // merge self into parent's result
-        buffer[bufferIndex - 1] += result.html;
-        var prev = componentBuffer[bufferIndex - 1];
-        result.components.forEach(function (c) { return prev.add(c); });
-      }
-      buffer.length = bufferIndex;
-      componentBuffer.length = bufferIndex;
-      this.next();
-      break
-  }
-};
-
-function normalizeAsync (cache, method) {
-  var fn = cache[method];
-  if (isUndef(fn)) {
-    return
-  } else if (fn.length > 1) {
-    return function (key, cb) { return fn.call(cache, key, cb); }
-  } else {
-    return function (key, cb) { return cb(fn.call(cache, key)); }
-  }
-}
-
-/*  */
-
-var validDivisionCharRE = /[\w).+\-_$\]]/;
-
-function parseFilters (exp) {
-  var inSingle = false;
-  var inDouble = false;
-  var inTemplateString = false;
-  var inRegex = false;
-  var curly = 0;
-  var square = 0;
-  var paren = 0;
-  var lastFilterIndex = 0;
-  var c, prev, i, expression, filters;
-
-  for (i = 0; i < exp.length; i++) {
-    prev = c;
-    c = exp.charCodeAt(i);
-    if (inSingle) {
-      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
-    } else if (inDouble) {
-      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
-    } else if (inTemplateString) {
-      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
-    } else if (inRegex) {
-      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
-    } else if (
-      c === 0x7C && // pipe
-      exp.charCodeAt(i + 1) !== 0x7C &&
-      exp.charCodeAt(i - 1) !== 0x7C &&
-      !curly && !square && !paren
-    ) {
-      if (expression === undefined) {
-        // first filter, end of expression
-        lastFilterIndex = i + 1;
-        expression = exp.slice(0, i).trim();
-      } else {
-        pushFilter();
-      }
-    } else {
-      switch (c) {
-        case 0x22: inDouble = true; break         // "
-        case 0x27: inSingle = true; break         // '
-        case 0x60: inTemplateString = true; break // `
-        case 0x28: paren++; break                 // (
-        case 0x29: paren--; break                 // )
-        case 0x5B: square++; break                // [
-        case 0x5D: square--; break                // ]
-        case 0x7B: curly++; break                 // {
-        case 0x7D: curly--; break                 // }
-      }
-      if (c === 0x2f) { // /
-        var j = i - 1;
-        var p = (void 0);
-        // find first non-whitespace prev char
-        for (; j >= 0; j--) {
-          p = exp.charAt(j);
-          if (p !== ' ') { break }
-        }
-        if (!p || !validDivisionCharRE.test(p)) {
-          inRegex = true;
-        }
-      }
+
+  /**
+   * Observe a list of Array items.
+   */
+  Observer.prototype.observeArray = function observeArray (items) {
+    for (var i = 0, l = items.length; i < l; i++) {
+      observe(items[i]);
     }
-  }
+  };
 
-  if (expression === undefined) {
-    expression = exp.slice(0, i).trim();
-  } else if (lastFilterIndex !== 0) {
-    pushFilter();
-  }
+  // helpers
 
-  function pushFilter () {
-    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
-    lastFilterIndex = i + 1;
+  /**
+   * Augment a target Object or Array by intercepting
+   * the prototype chain using __proto__
+   */
+  function protoAugment (target, src) {
+    /* eslint-disable no-proto */
+    target.__proto__ = src;
+    /* eslint-enable no-proto */
   }
 
-  if (filters) {
-    for (i = 0; i < filters.length; i++) {
-      expression = wrapFilter(expression, filters[i]);
+  /**
+   * Augment a target Object or Array by defining
+   * hidden properties.
+   */
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
+    for (var i = 0, l = keys.length; i < l; i++) {
+      var key = keys[i];
+      def(target, key, src[key]);
     }
   }
 
-  return expression
-}
-
-function wrapFilter (exp, filter) {
-  var i = filter.indexOf('(');
-  if (i < 0) {
-    // _f: resolveFilter
-    return ("_f(\"" + filter + "\")(" + exp + ")")
-  } else {
-    var name = filter.slice(0, i);
-    var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
-  }
-}
-
-/*  */
-
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
-var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
-
-var buildRegex = cached(function (delimiters) {
-  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
-  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
-  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-});
-
-
-
-function parseText (
-  text,
-  delimiters
-) {
-  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-  if (!tagRE.test(text)) {
-    return
-  }
-  var tokens = [];
-  var rawTokens = [];
-  var lastIndex = tagRE.lastIndex = 0;
-  var match, index, tokenValue;
-  while ((match = tagRE.exec(text))) {
-    index = match.index;
-    // push text token
-    if (index > lastIndex) {
-      rawTokens.push(tokenValue = text.slice(lastIndex, index));
-      tokens.push(JSON.stringify(tokenValue));
+  /**
+   * Attempt to create an observer instance for a value,
+   * returns the new observer if successfully observed,
+   * or the existing observer if the value already has one.
+   */
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
     }
-    // tag token
-    var exp = parseFilters(match[1].trim());
-    tokens.push(("_s(" + exp + ")"));
-    rawTokens.push({ '@binding': exp });
-    lastIndex = index + match[0].length;
-  }
-  if (lastIndex < text.length) {
-    rawTokens.push(tokenValue = text.slice(lastIndex));
-    tokens.push(JSON.stringify(tokenValue));
-  }
-  return {
-    expression: tokens.join('+'),
-    tokens: rawTokens
-  }
-}
-
-/*  */
-
-function baseWarn (msg) {
-  console.error(("[Vue compiler]: " + msg));
-}
-
-function pluckModuleFunction (
-  modules,
-  key
-) {
-  return modules
-    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
-    : []
-}
-
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-// add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
-  el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
-}
-
-function addDirective (
-  el,
-  name,
-  rawName,
-  value,
-  arg,
-  modifiers
-) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
-  el.plain = false;
-}
-
-function addHandler (
-  el,
-  name,
-  value,
-  modifiers,
-  important,
-  warn
-) {
-  modifiers = modifiers || emptyObject;
-  // warn prevent and passive modifier
-  /* istanbul ignore if */
-  if (
-    "development" !== 'production' && warn &&
-    modifiers.prevent && modifiers.passive
-  ) {
-    warn(
-      'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
-    );
-  }
-
-  // check capture modifier
-  if (modifiers.capture) {
-    delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
-  }
-  if (modifiers.once) {
-    delete modifiers.once;
-    name = '~' + name; // mark the event as once
-  }
-  /* istanbul ignore if */
-  if (modifiers.passive) {
-    delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
+    var ob;
+    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+      ob = value.__ob__;
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
+      ob = new Observer(value);
+    }
+    if (asRootData && ob) {
+      ob.vmCount++;
     }
+    return ob
   }
 
-  var events;
-  if (modifiers.native) {
-    delete modifiers.native;
-    events = el.nativeEvents || (el.nativeEvents = {});
-  } else {
-    events = el.events || (el.events = {});
-  }
+  /**
+   * Define a reactive property on an Object.
+   */
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
+    var dep = new Dep();
 
-  var newHandler = { value: value };
-  if (modifiers !== emptyObject) {
-    newHandler.modifiers = modifiers;
-  }
+    var property = Object.getOwnPropertyDescriptor(obj, key);
+    if (property && property.configurable === false) {
+      return
+    }
 
-  var handlers = events[name];
-  /* istanbul ignore if */
-  if (Array.isArray(handlers)) {
-    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
-  } else if (handlers) {
-    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
-  } else {
-    events[name] = newHandler;
-  }
-
-  el.plain = false;
-}
-
-function getBindingAttr (
-  el,
-  name,
-  getStatic
-) {
-  var dynamicValue =
-    getAndRemoveAttr(el, ':' + name) ||
-    getAndRemoveAttr(el, 'v-bind:' + name);
-  if (dynamicValue != null) {
-    return parseFilters(dynamicValue)
-  } else if (getStatic !== false) {
-    var staticValue = getAndRemoveAttr(el, name);
-    if (staticValue != null) {
-      return JSON.stringify(staticValue)
-    }
-  }
-}
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-function getAndRemoveAttr (
-  el,
-  name,
-  removeFromMap
-) {
-  var val;
-  if ((val = el.attrsMap[name]) != null) {
-    var list = el.attrsList;
-    for (var i = 0, l = list.length; i < l; i++) {
-      if (list[i].name === name) {
-        list.splice(i, 1);
-        break
+    // cater for pre-defined getter/setters
+    var getter = property && property.get;
+    var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
+    }
+
+    var childOb = !shallow && observe(val);
+    Object.defineProperty(obj, key, {
+      enumerable: true,
+      configurable: true,
+      get: function reactiveGetter () {
+        var value = getter ? getter.call(obj) : val;
+        if (Dep.target) {
+          dep.depend();
+          if (childOb) {
+            childOb.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
+            }
+          }
+        }
+        return value
+      },
+      set: function reactiveSetter (newVal) {
+        var value = getter ? getter.call(obj) : val;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
+        }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
+        if (setter) {
+          setter.call(obj, newVal);
+        } else {
+          val = newVal;
+        }
+        childOb = !shallow && observe(newVal);
+        dep.notify();
       }
-    }
-  }
-  if (removeFromMap) {
-    delete el.attrsMap[name];
+    });
   }
-  return val
-}
 
-/*  */
-
-function transformNode (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticClass = getAndRemoveAttr(el, 'class');
-  if ("development" !== 'production' && staticClass) {
-    var res = parseText(staticClass, options.delimiters);
-    if (res) {
+  /**
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
+   */
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+    }
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
+    }
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
       warn(
-        "class=\"" + staticClass + "\": " +
-        'Interpolation inside attributes has been removed. ' +
-        'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
       );
+      return val
     }
+    if (!ob) {
+      target[key] = val;
+      return val
+    }
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
   }
-  if (staticClass) {
-    el.staticClass = JSON.stringify(staticClass);
-  }
-  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-  if (classBinding) {
-    el.classBinding = classBinding;
-  }
-}
 
-function genData (el) {
-  var data = '';
-  if (el.staticClass) {
-    data += "staticClass:" + (el.staticClass) + ",";
-  }
-  if (el.classBinding) {
-    data += "class:" + (el.classBinding) + ",";
+  /**
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
+   */
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
+      }
+    }
   }
-  return data
-}
 
-var klass = {
-  staticKeys: ['staticClass'],
-  transformNode: transformNode,
-  genData: genData
-};
+  /*  */
 
-/*  */
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
 
-function transformNode$1 (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticStyle = getAndRemoveAttr(el, 'style');
-  if (staticStyle) {
-    /* istanbul ignore if */
-    {
-      var res = parseText(staticStyle, options.delimiters);
-      if (res) {
+  /**
+   * Options with restrictions
+   */
+  {
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
         warn(
-          "style=\"" + staticStyle + "\": " +
-          'Interpolation inside attributes has been removed. ' +
-          'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
         );
       }
-    }
-    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
-  }
-
-  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-  if (styleBinding) {
-    el.styleBinding = styleBinding;
+      return defaultStrat(parent, child)
+    };
   }
-}
 
-function genData$1 (el) {
-  var data = '';
-  if (el.staticStyle) {
-    data += "staticStyle:" + (el.staticStyle) + ",";
-  }
-  if (el.styleBinding) {
-    data += "style:(" + (el.styleBinding) + "),";
-  }
-  return data
-}
-
-var style = {
-  staticKeys: ['staticStyle'],
-  transformNode: transformNode$1,
-  genData: genData$1
-};
-
-var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-
-
-
-
-function createCommonjsModule(fn, module) {
-	return module = { exports: {} }, fn(module, module.exports), module.exports;
-}
-
-var he = createCommonjsModule(function (module, exports) {
-/*! https://mths.be/he v1.1.1 by @mathias | MIT license */
-(function(root) {
-
-	// Detect free variables `exports`.
-	var freeExports = 'object' == 'object' && exports;
-
-	// Detect free variable `module`.
-	var freeModule = 'object' == 'object' && module &&
-		module.exports == freeExports && module;
-
-	// Detect free variable `global`, from Node.js or Browserified code,
-	// and use it as `root`.
-	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
-	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
-		root = freeGlobal;
-	}
-
-	/*--------------------------------------------------------------------------*/
-
-	// All astral symbols.
-	var regexAstralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
-	// All ASCII symbols (not just printable ASCII) except those listed in the
-	// first column of the overrides table.
-	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides
-	var regexAsciiWhitelist = /[\x01-\x7F]/g;
-	// All BMP symbols that are not ASCII newlines, printable ASCII symbols, or
-	// code points listed in the first column of the overrides table on
-	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides.
-	var regexBmpWhitelist = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g;
-
-	var regexEncodeNonAscii = /<\u20D2|=\u20E5|>\u20D2|\u205F\u200A|\u219D\u0338|\u2202\u0338|\u2220\u20D2|\u2229\uFE00|\u222A\uFE00|\u223C\u20D2|\u223D\u0331|\u223E\u0333|\u2242\u0338|\u224B\u0338|\u224D\u20D2|\u224E\u0338|\u224F\u0338|\u2250\u0338|\u2261\u20E5|\u2264\u20D2|\u2265\u20D2|\u2266\u0338|\u2267\u0338|\u2268\uFE00|\u2269\uFE00|\u226A\u0338|\u226A\u20D2|\u226B\u0338|\u226B\u20D2|\u227F\u0338|\u2282\u20D2|\u2283\u20D2|\u228A\uFE00|\u228B\uFE00|\u228F\u0338|\u2290\u0338|\u2293\uFE00|\u2294\uFE00|\u22B4\u20D2|\u22B5\u20D2|\u22D8\u0338|\u22D9\u0338|\u22DA\uFE00|\u22DB\uFE00|\u22F5\u0338|\u22F9\u0338|\u2933\u0338|\u29CF\u0338|\u29D0\u0338|\u2A6D\u0338|\u2A70\u0338|\u2A7D\u0338|\u2A7E\u0338|\u2AA1\u0338|\u2AA2\u0338|\u2AAC\uFE00|\u2AAD\uFE00|\u2AAF\u0338|\u2AB0\u0338|\u2AC5\u0338|\u2AC6\u0338|\u2ACB\uFE00|\u2ACC\uFE00|\u2AFD\u20E5|[\xA0-\u0113\u0116-\u0122\u0124-\u012B\u012E-\u014D\u0150-\u017E\u0192\u01B5\u01F5\u0237\u02C6\u02C7\u02D8-\u02DD\u0311\u0391-\u03A1\u03A3-\u03A9\u03B1-\u03C9\u03D1\u03D2\u03D5\u03D6\u03DC\u03DD\u03F0\u03F1\u03F5\u03F6\u0401-\u040C\u040E-\u044F\u0451-\u045C\u045E\u045F\u2002-\u2005\u2007-\u2010\u2013-\u2016\u2018-\u201A\u201C-\u201E\u2020-\u2022\u2025\u2026\u2030-\u2035\u2039\u203A\u203E\u2041\u2043\u2044\u204F\u2057\u205F-\u2063\u20AC\u20DB\u20DC\u2102\u2105\u210A-\u2113\u2115-\u211E\u2122\u2124\u2127-\u2129\u212C\u212D\u212F-\u2131\u2133-\u2138\u2145-\u2148\u2153-\u215E\u2190-\u219B\u219D-\u21A7\u21A9-\u21AE\u21B0-\u21B3\u21B5-\u21B7\u21BA-\u21DB\u21DD\u21E4\u21E5\u21F5\u21FD-\u2205\u2207-\u2209\u220B\u220C\u220F-\u2214\u2216-\u2218\u221A\u221D-\u2238\u223A-\u2257\u2259\u225A\u225C\u225F-\u2262\u2264-\u228B\u228D-\u229B\u229D-\u22A5\u22A7-\u22B0\u22B2-\u22BB\u22BD-\u22DB\u22DE-\u22E3\u22E6-\u22F7\u22F9-\u22FE\u2305\u2306\u2308-\u2310\u2312\u2313\u2315\u2316\u231C-\u231F\u2322\u2323\u232D\u232E\u2336\u233D\u233F\u237C\u23B0\u23B1\u23B4-\u23B6\u23DC-\u23DF\u23E2\u23E7\u2423\u24C8\u2500\u2502\u250C\u2510\u2514\u2518\u251C\u2524\u252C\u2534\u253C\u2550-\u256C\u2580\u2584\u2588\u2591-\u2593\u25A1\u25AA\u25AB\u25AD\u25AE\u25B1\u25B3-\u25B5\u25B8\u25B9\u25BD-\u25BF\u25C2\u25C3\u25CA\u25CB\u25EC\u25EF\u25F8-\u25FC\u2605\u2606\u260E\u2640\u2642\u2660\u2663\u2665\u2666\u266A\u266D-\u266F\u2713\u2717\u2720\u2736\u2758\u2772\u2773\u27C8\u27C9\u27E6-\u27ED\u27F5-\u27FA\u27FC\u27FF\u2902-\u2905\u290C-\u2913\u2916\u2919-\u2920\u2923-\u292A\u2933\u2935-\u2939\u293C\u293D\u2945\u2948-\u294B\u294E-\u2976\u2978\u2979\u297B-\u297F\u2985\u2986\u298B-\u2996\u299A\u299C\u299D\u29A4-\u29B7\u29B9\u29BB\u29BC\u29BE-\u29C5\u29C9\u29CD-\u29D0\u29DC-\u29DE\u29E3-\u29E5\u29EB\u29F4\u29F6\u2A00-\u2A02\u2A04\u2A06\u2A0C\u2A0D\u2A10-\u2A17\u2A22-\u2A27\u2A29\u2A2A\u2A2D-\u2A31\u2A33-\u2A3C\u2A3F\u2A40\u2A42-\u2A4D\u2A50\u2A53-\u2A58\u2A5A-\u2A5D\u2A5F\u2A66\u2A6A\u2A6D-\u2A75\u2A77-\u2A9A\u2A9D-\u2AA2\u2AA4-\u2AB0\u2AB3-\u2AC8\u2ACB\u2ACC\u2ACF-\u2ADB\u2AE4\u2AE6-\u2AE9\u2AEB-\u2AF3\u2AFD\uFB00-\uFB04]|\uD835[\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDCCF\uDD04\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDD6B]/g;
-	var encodeMap = 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','\u2A73':'Esim','\u2A77':'eDDot','\u2A78':'equivDD','\u2A79':'ltcir','\u2A7A':'gtcir','\u2A7B':'ltquest','\u2A7C':'gtquest','\u2A7D':'les','\u2A7D\u0338':'nles','\u2A7E':'ges','\u2A7E\u0338':'nges','\u2A7F':'lesdot','\u2A80':'gesdot','\u2A81':'lesdoto','\u2A82':'gesdoto','\u2A83':'lesdotor','\u2A84':'gesdotol','\u2A85':'lap','\u2A86':'gap','\u2A87':'lne','\u2A88':'gne','\u2A89':'lnap','\u2A8A':'gnap','\u2A8B':'lEg','\u2A8C':'gEl','\u2A8D':'lsime','\u2A8E':'gsime','\u2A8F':'lsimg','\u2A90':'gsiml','\u2A91':'lgE','\u2A92':'glE','\u2A93':'lesges','\u2A94':'gesles','\u2A95':'els','\u2A96':'egs','\u2A97':'elsdot','\u2A98':'egsdot','\u2A99':'el','\u2A9A':'eg','\u2A9D':'siml','\u2A9E':'simg','\u2A9F':'simlE','\u2AA0':'simgE','\u2AA1':'LessLess','\u2AA1\u0338':'NotNestedLessLess','\u2AA2':'GreaterGreater','\u2AA2\u0338':'NotNestedGreaterGreater','\u2AA4':'glj','\u2AA5':'gla','\u2AA6':'ltcc','\u2AA7':'gtcc','\u2AA8':'lescc','\u2AA9':'gescc','\u2AAA':'smt','\u2AAB':'lat','\u2AAC':'smte','\u2AAC\uFE00':'smtes','\u2AAD':'late','\u2AAD\uFE00':'lates','\u2AAE':'bumpE','\u2AAF':'pre','\u2AAF\u0338':'npre','\u2AB0':'sce','\u2AB0\u0338':'nsce','\u2AB3':'prE','\u2AB4':'scE','\u2AB5':'prnE','\u2AB6':'scnE','\u2AB7':'prap','\u2AB8':'scap','\u2AB9':'prnap','\u2ABA':'scnap','\u2ABB':'Pr','\u2ABC':'Sc','\u2ABD':'subdot','\u2ABE':'supdot','\u2ABF':'subplus','\u2AC0':'supplus','\u2AC1':'submult','\u2AC2':'supmult','\u2AC3':'subedot','\u2AC4':'supedot','\u2AC5':'subE','\u2AC5\u0338':'nsubE','\u2AC6':'supE','\u2AC6\u0338':'nsupE','\u2AC7':'subsim','\u2AC8':'supsim','\u2ACB\uFE00':'vsubnE','\u2ACB':'subnE','\u2ACC\uFE00':'vsupnE','\u2ACC':'supnE','\u2ACF':'csub','\u2AD0':'csup','\u2AD1':'csube','\u2AD2':'csupe','\u2AD3':'subsup','\u2AD4':'supsub','\u2AD5':'subsub','\u2AD6':'supsup','\u2AD7':'suphsub','\u2AD8':'supdsub','\u2AD9':'forkv','\u2ADA':'topfork','\u2ADB':'mlcp','\u2AE4':'Dashv','\u2AE6':'Vdashl','\u2AE7':'Barv','\u2AE8':'vBar','\u2AE9':'vBarv','\u2AEB':'Vbar','\u2AEC':'Not','\u2AED':'bNot','\u2AEE':'rnmid','\u2AEF':'cirmid','\u2AF0':'midcir','\u2AF1':'topcir','\u2AF2':'nhpar','\u2AF3':'parsim','\u2AFD':'parsl','\u2AFD\u20E5':'nparsl','\u266D':'flat','\u266E':'natur','\u266F':'sharp','\xA4':'curren','\xA2':'cent','$':'dollar','\xA3':'pound','\xA5':'yen','\u20AC':'euro','\xB9':'sup1','\xBD':'half','\u2153':'frac13','\xBC':'frac14','\u2155':'frac15','\u2159':'frac16','\u215B':'frac18','\xB2':'sup2','\u2154':'frac23','\u2156':'frac25','\xB3':'sup3','\xBE':'frac34','\u2157':'frac35','\u215C':'frac38','\u2158':'frac45','\u215A':'frac56','\u215D':'frac58','\u215E':'frac78','\uD835\uDCB6':'ascr','\uD835\uDD52':'aopf','\uD835\uDD1E':'afr','\uD835\uDD38':'Aopf','\uD835\uDD04':'Afr','\uD835\uDC9C':'Ascr','\xAA':'ordf','\xE1':'aacute','\xC1':'Aacute','\xE0':'agrave','\xC0':'Agrave','\u0103':'abreve','\u0102':'Abreve','\xE2':'acirc','\xC2':'Acirc','\xE5':'aring','\xC5':'angst','\xE4':'auml','\xC4':'Auml','\xE3':'atilde','\xC3':'Atilde','\u0105':'aogon','\u0104':'Aogon','\u0101':'amacr','\u0100':'Amacr','\xE6':'aelig','\xC6':'AElig','\uD835\uDCB7':'bscr','\uD835\uDD53':'bopf','\uD835\uDD1F':'bfr','\uD835\uDD39':'Bopf','\u212C':'Bscr','\uD835\uDD05':'Bfr','\uD835\uDD20':'cfr','\uD835\uDCB8':'cscr','\uD835\uDD54':'copf','\u212D':'Cfr','\uD835\uDC9E':'Cscr','\u2102':'Copf','\u0107':'cacute','\u0106':'Cacute','\u0109':'ccirc','\u0108':'Ccirc','\u010D':'ccaron','\u010C':'Ccaron','\u010B':'cdot','\u010A':'Cdot','\xE7':'ccedil','\xC7':'Ccedil','\u2105':'incare','\uD835\uDD21':'dfr','\u2146':'dd','\uD835\uDD55':'dopf','\uD835\uDCB9':'dscr','\uD835\uDC9F':'Dscr','\uD835\uDD07':'Dfr','\u2145':'DD','\uD835\uDD3B':'Dopf','\u010F':'dcaron','\u010E':'Dcaron','\u0111':'dstrok','\u0110':'Dstrok','\xF0':'eth','\xD0':'ETH','\u2147':'ee','\u212F':'escr','\uD835\uDD22':'efr','\uD835\uDD56':'eopf','\u2130':'Escr','\uD835\uDD08':'Efr','\uD835\uDD3C':'Eopf','\xE9':'eacute','\xC9':'Eacute','\xE8':'egrave','\xC8':'Egrave','\xEA':'ecirc','\xCA':'Ecirc','\u011B':'ecaron','\u011A':'Ecaron','\xEB':'euml','\xCB':'Euml','\u0117':'edot','\u0116':'Edot','\u0119':'eogon','\u0118':'Eogon','\u0113':'emacr','\u0112':'Emacr','\uD835\uDD23':'ffr','\uD835\uDD57':'fopf','\uD835\uDCBB':'fscr','\uD835\uDD09':'Ffr','\uD835\uDD3D':'Fopf','\u2131':'Fscr','\uFB00':'fflig','\uFB03':'ffilig','\uFB04':'ffllig','\uFB01':'filig','fj':'fjlig','\uFB02':'fllig','\u0192':'fnof','\u210A':'gscr','\uD835\uDD58':'gopf','\uD835\uDD24':'gfr','\uD835\uDCA2':'Gscr','\uD835\uDD3E':'Gopf','\uD835\uDD0A':'Gfr','\u01F5':'gacute','\u011F':'gbreve','\u011E':'Gbreve','\u011D':'gcirc','\u011C':'Gcirc','\u0121':'gdot','\u0120':'Gdot','\u0122':'Gcedil','\uD835\uDD25':'hfr','\u210E':'planckh','\uD835\uDCBD':'hscr','\uD835\uDD59':'hopf','\u210B':'Hscr','\u210C':'Hfr','\u210D':'Hopf','\u0125':'hcirc','\u0124':'Hcirc','\u210F':'hbar','\u0127':'hstrok','\u0126':'Hstrok','\uD835\uDD5A':'iopf','\uD835\uDD26':'ifr','\uD835\uDCBE':'iscr','\u2148':'ii','\uD835\uDD40':'Iopf','\u2110':'Iscr','\u2111':'Im','\xED':'iacute','\xCD':'Iacute','\xEC':'igrave','\xCC':'Igrave','\xEE':'icirc','\xCE':'Icirc','\xEF':'iuml','\xCF':'Iuml','\u0129':'itilde','\u0128':'Itilde','\u0130':'Idot','\u012F':'iogon','\u012E':'Iogon','\u012B':'imacr','\u012A':'Imacr','\u0133':'ijlig','\u0132':'IJlig','\u0131':'imath','\uD835\uDCBF':'jscr','\uD835\uDD5B':'jopf','\uD835\uDD27':'jfr','\uD835\uDCA5':'Jscr','\uD835\uDD0D':'Jfr','\uD835\uDD41':'Jopf','\u0135':'jcirc','\u0134':'Jcirc','\u0237':'jmath','\uD835\uDD5C':'kopf','\uD835\uDCC0':'kscr','\uD835\uDD28':'kfr','\uD835\uDCA6':'Kscr','\uD835\uDD42':'Kopf','\uD835\uDD0E':'Kfr','\u0137':'kcedil','\u0136':'Kcedil','\uD835\uDD29':'lfr','\uD835\uDCC1':'lscr','\u2113':'ell','\uD835\uDD5D':'lopf','\u2112':'Lscr','\uD835\uDD0F':'Lfr','\uD835\uDD43':'Lopf','\u013A':'lacute','\u0139':'Lacute','\u013E':'lcaron','\u013D':'Lcaron','\u013C':'lcedil','\u013B':'Lcedil','\u0142':'lstrok','\u0141':'Lstrok','\u0140':'lmidot','\u013F':'Lmidot','\uD835\uDD2A':'mfr','\uD835\uDD5E':'mopf','\uD835\uDCC2':'mscr','\uD835\uDD10':'Mfr','\uD835\uDD44':'Mopf','\u2133':'Mscr','\uD835\uDD2B':'nfr','\uD835\uDD5F':'nopf','\uD835\uDCC3':'nscr','\u2115':'Nopf','\uD835\uDCA9':'Nscr','\uD835\uDD11':'Nfr','\u0144':'nacute','\u0143':'Nacute','\u0148':'ncaron','\u0147':'Ncaron','\xF1':'ntilde','\xD1':'Ntilde','\u0146':'ncedil','\u0145':'Ncedil','\u2116':'numero','\u014B':'eng','\u014A':'ENG','\uD835\uDD60':'oopf','\uD835\uDD2C':'ofr','\u2134':'oscr','\uD835\uDCAA':'Oscr','\uD835\uDD12':'Ofr','\uD835\uDD46':'Oopf','\xBA':'ordm','\xF3':'oacute','\xD3':'Oacute','\xF2':'ograve','\xD2':'Ograve','\xF4':'ocirc','\xD4':'Ocirc','\xF6':'ouml','\xD6':'Ouml','\u0151':'odblac','\u0150':'Odblac','\xF5':'otilde','\xD5':'Otilde','\xF8':'oslash','\xD8':'Oslash','\u014D':'omacr','\u014C':'Omacr','\u0153':'oelig','\u0152':'OElig','\uD835\uDD2D':'pfr','\uD835\uDCC5':'pscr','\uD835\uDD61':'popf','\u2119':'Popf','\uD835\uDD13':'Pfr','\uD835\uDCAB':'Pscr','\uD835\uDD62':'qopf','\uD835\uDD2E':'qfr','\uD835\uDCC6':'qscr','\uD835\uDCAC':'Qscr','\uD835\uDD14':'Qfr','\u211A':'Qopf','\u0138':'kgreen','\uD835\uDD2F':'rfr','\uD835\uDD63':'ropf','\uD835\uDCC7':'rscr','\u211B':'Rscr','\u211C':'Re','\u211D':'Ropf','\u0155':'racute','\u0154':'Racute','\u0159':'rcaron','\u0158':'Rcaron','\u0157':'rcedil','\u0156':'Rcedil','\uD835\uDD64':'sopf','\uD835\uDCC8':'sscr','\uD835\uDD30':'sfr','\uD835\uDD4A':'Sopf','\uD835\uDD16':'Sfr','\uD835\uDCAE':'Sscr','\u24C8':'oS','\u015B':'sacute','\u015A':'Sacute','\u015D':'scirc','\u015C':'Scirc','\u0161':'scaron','\u0160':'Scaron','\u015F':'scedil','\u015E':'Scedil','\xDF':'szlig','\uD835\uDD31':'tfr','\uD835\uDCC9':'tscr','\uD835\uDD65':'topf','\uD835\uDCAF':'Tscr','\uD835\uDD17':'Tfr','\uD835\uDD4B':'Topf','\u0165':'tcaron','\u0164':'Tcaron','\u0163':'tcedil','\u0162':'Tcedil','\u2122':'trade','\u0167':'tstrok','\u0166':'Tstrok','\uD835\uDCCA':'uscr','\uD835\uDD66':'uopf','\uD835\uDD32':'ufr','\uD835\uDD4C':'Uopf','\uD835\uDD18':'Ufr','\uD835\uDCB0':'Uscr','\xFA':'uacute','\xDA':'Uacute','\xF9':'ugrave','\xD9':'Ugrave','\u016D':'ubreve','\u016C':'Ubreve','\xFB':'ucirc','\xDB':'Ucirc','\u016F':'uring','\u016E':'Uring','\xFC':'uuml','\xDC':'Uuml','\u0171':'udblac','\u0170':'Udblac','\u0169':'utilde','\u0168':'Utilde','\u0173':'uogon','\u0172':'Uogon','\u016B':'umacr','\u016A':'Umacr','\uD835\uDD33':'vfr','\uD835\uDD67':'vopf','\uD835\uDCCB':'vscr','\uD835\uDD19':'Vfr','\uD835\uDD4D':'Vopf','\uD835\uDCB1':'Vscr','\uD835\uDD68':'wopf','\uD835\uDCCC':'wscr','\uD835\uDD34':'wfr','\uD835\uDCB2':'Wscr','\uD835\uDD4E':'Wopf','\uD835\uDD1A':'Wfr','\u0175':'wcirc','\u0174':'Wcirc','\uD835\uDD35':'xfr','\uD835\uDCCD':'xscr','\uD835\uDD69':'xopf','\uD835\uDD4F':'Xopf','\uD835\uDD1B':'Xfr','\uD835\uDCB3':'Xscr','\uD835\uDD36':'yfr','\uD835\uDCCE':'yscr','\uD835\uDD6A':'yopf','\uD835\uDCB4':'Yscr','\uD835\uDD1C':'Yfr','\uD835\uDD50':'Yopf','\xFD':'yacute','\xDD':'Yacute','\u0177':'ycirc','\u0176':'Ycirc','\xFF':'yuml','\u0178':'Yuml','\uD835\uDCCF':'zscr','\uD835\uDD37':'zfr','\uD835\uDD6B':'zopf','\u2128':'Zfr','\u2124':'Zopf','\uD835\uDCB5':'Zscr','\u017A':'zacute','\u0179':'Zacute','\u017E':'zcaron','\u017D':'Zcaron','\u017C':'zdot','\u017B':'Zdot','\u01B5':'imped','\xFE':'thorn','\xDE':'THORN','\u0149':'napos','\u03B1':'alpha','\u0391':'Alpha','\u03B2':'beta','\u0392':'Beta','\u03B3':'gamma','\u0393':'Gamma','\u03B4':'delta','\u0394':'Delta','\u03B5':'epsi','\u03F5':'epsiv','\u0395':'Epsilon','\u03DD':'gammad','\u03DC':'Gammad','\u03B6':'zeta','\u0396':'Zeta','\u03B7':'eta','\u0397':'Eta','\u03B8':'theta','\u03D1':'thetav','\u0398':'Theta','\u03B9':'iota','\u0399':'Iota','\u03BA':'kappa','\u03F0':'kappav','\u039A':'Kappa','\u03BB':'lambda','\u039B':'Lambda','\u03BC':'mu','\xB5':'micro','\u039C':'Mu','\u03BD':'nu','\u039D':'Nu','\u03BE':'xi','\u039E':'Xi','\u03BF':'omicron','\u039F':'Omicron','\u03C0':'pi','\u03D6':'piv','\u03A0':'Pi','\u03C1':'rho','\u03F1':'rhov','\u03A1':'Rho','\u03C3':'sigma','\u03A3':'Sigma','\u03C2':'sigmaf','\u03C4':'tau','\u03A4':'Tau','\u03C5':'upsi','\u03A5':'Upsilon','\u03D2':'Upsi','\u03C6':'phi','\u03D5':'phiv','\u03A6':'Phi','\u03C7':'chi','\u03A7':'Chi','\u03C8':'psi','\u03A8':'Psi','\u03C9':'omega','\u03A9':'ohm','\u0430':'acy','\u0410':'Acy','\u0431':'bcy','\u0411':'Bcy','\u0432':'vcy','\u0412':'Vcy','\u0433':'gcy','\u0413':'Gcy','\u0453':'gjcy','\u0403':'GJcy','\u0434':'dcy','\u0414':'Dcy','\u0452':'djcy','\u0402':'DJcy','\u0435':'iecy','\u0415':'IEcy','\u0451':'iocy','\u0401':'IOcy','\u0454':'jukcy','\u0404':'Jukcy','\u0436':'zhcy','\u0416':'ZHcy','\u0437':'zcy','\u0417':'Zcy','\u0455':'dscy','\u0405':'DScy','\u0438':'icy','\u0418':'Icy','\u0456':'iukcy','\u0406':'Iukcy','\u0457':'yicy','\u0407':'YIcy','\u0439':'jcy','\u0419':'Jcy','\u0458':'jsercy','\u0408':'Jsercy','\u043A':'kcy','\u041A':'Kcy','\u045C':'kjcy','\u040C':'KJcy','\u043B':'lcy','\u041B':'Lcy','\u0459':'ljcy','\u0409':'LJcy','\u043C':'mcy','\u041C':'Mcy','\u043D':'ncy','\u041D':'Ncy','\u045A':'njcy','\u040A':'NJcy','\u043E':'ocy','\u041E':'Ocy','\u043F':'pcy','\u041F':'Pcy','\u0440':'rcy','\u0420':'Rcy','\u0441':'scy','\u0421':'Scy','\u0442':'tcy','\u0422':'Tcy','\u045B':'tshcy','\u040B':'TSHcy','\u0443':'ucy','\u0423':'Ucy','\u045E':'ubrcy','\u040E':'Ubrcy','\u0444':'fcy','\u0424':'Fcy','\u0445':'khcy','\u0425':'KHcy','\u0446':'tscy','\u0426':'TScy','\u0447':'chcy','\u0427':'CHcy','\u045F':'dzcy','\u040F':'DZcy','\u0448':'shcy','\u0428':'SHcy','\u0449':'shchcy','\u0429':'SHCHcy','\u044A':'hardcy','\u042A':'HARDcy','\u044B':'ycy','\u042B':'Ycy','\u044C':'softcy','\u042C':'SOFTcy','\u044D':'ecy','\u042D':'Ecy','\u044E':'yucy','\u042E':'YUcy','\u044F':'yacy','\u042F':'YAcy','\u2135':'aleph','\u2136':'beth','\u2137':'gimel','\u2138':'daleth'};
-
-	var regexEscape = /["&'<>`]/g;
-	var escapeMap = {
-		'"': '&quot;',
-		'&': '&amp;',
-		'\'': '&#x27;',
-		'<': '&lt;',
-		// See https://mathiasbynens.be/notes/ambiguous-ampersands: in HTML, the
-		// following is not strictly necessary unless it’s part of a tag or an
-		// unquoted attribute value. We’re only escaping it to support those
-		// situations, and for XML support.
-		'>': '&gt;',
-		// In Internet Explorer ≤ 8, the backtick character can be used
-		// to break out of (un)quoted attribute values or HTML comments.
-		// See http://html5sec.org/#102, http://html5sec.org/#108, and
-		// http://html5sec.org/#133.
-		'`': '&#x60;'
-	};
-
-	var regexInvalidEntity = /&#(?:[xX][^a-fA-F0-9]|[^0-9xX])/;
-	var regexInvalidRawCodePoint = /[\0-\x08\x0B\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]|[\uD83F\uD87F\uD8BF\uD8FF\uD93F\uD97F\uD9BF\uD9FF\uDA3F\uDA7F\uDABF\uDAFF\uDB3F\uDB7F\uDBBF\uDBFF][\uDFFE\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
-	var regexDecode = /&#([0-9]+)(;?)|&#[xX]([a-fA-F0-9]+)(;?)|&([0-9a-zA-Z]+);|&(Aacute|Agrave|Atilde|Ccedil|Eacute|Egrave|Iacute|Igrave|Ntilde|Oacute|Ograve|Oslash|Otilde|Uacute|Ugrave|Yacute|aacute|agrave|atilde|brvbar|ccedil|curren|divide|eacute|egrave|frac12|frac14|frac34|iacute|igrave|iquest|middot|ntilde|oacute|ograve|oslash|otilde|plusmn|uacute|ugrave|yacute|AElig|Acirc|Aring|Ecirc|Icirc|Ocirc|THORN|Ucirc|acirc|acute|aelig|aring|cedil|ecirc|icirc|iexcl|laquo|micro|ocirc|pound|raquo|szlig|thorn|times|ucirc|Auml|COPY|Euml|Iuml|Ouml|QUOT|Uuml|auml|cent|copy|euml|iuml|macr|nbsp|ordf|ordm|ouml|para|quot|sect|sup1|sup2|sup3|uuml|yuml|AMP|ETH|REG|amp|deg|eth|not|reg|shy|uml|yen|GT|LT|gt|lt)([=a-zA-Z0-9])?/g;
-	var decodeMap = {'aacute':'\xE1','Aacute':'\xC1','abreve':'\u0103','Abreve':'\u0102','ac':'\u223E','acd':'\u223F','acE':'\u223E\u0333','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','acy':'\u0430','Acy':'\u0410','aelig':'\xE6','AElig':'\xC6','af':'\u2061','afr':'\uD835\uDD1E','Afr':'\uD835\uDD04','agrave':'\xE0','Agrave':'\xC0','alefsym':'\u2135','aleph':'\u2135','alpha':'\u03B1','Alpha':'\u0391','amacr':'\u0101','Amacr':'\u0100','amalg':'\u2A3F','amp':'&','AMP':'&','and':'\u2227','And':'\u2A53','andand':'\u2A55','andd':'\u2A5C','andslope':'\u2A58','andv':'\u2A5A','ang':'\u2220','ange':'\u29A4','angle':'\u2220','angmsd':'\u2221','angmsdaa':'\u29A8','angmsdab':'\u29A9','angmsdac':'\u29AA','angmsdad':'\u29AB','angmsdae':'\u29AC','angmsdaf':'\u29AD','angmsdag':'\u29AE','angmsdah':'\u29AF','angrt':'\u221F','angrtvb':'\u22BE','angrtvbd':'\u299D','angsph':'\u2222','angst':'\xC5','angzarr':'\u237C','aogon':'\u0105','Aogon':'\u0104','aopf':'\uD835\uDD52','Aopf':'\uD835\uDD38','ap':'\u2248','apacir':'\u2A6F','ape':'\u224A','apE':'\u2A70','apid':'\u224B','apos':'\'','ApplyFunction':'\u2061','approx':'\u2248','approxeq':'\u224A','aring':'\xE5','Aring':'\xC5','ascr':'\uD835\uDCB6','Ascr':'\uD835\uDC9C','Assign':'\u2254','ast':'*','asymp':'\u2248','asympeq':'\u224D','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','awconint':'\u2233','awint':'\u2A11','backcong':'\u224C','backepsilon':'\u03F6','backprime':'\u2035','backsim':'\u223D','backsimeq':'\u22CD','Backslash':'\u2216','Barv':'\u2AE7','barvee':'\u22BD','barwed':'\u2305','Barwed':'\u2306','barwedge':'\u2305','bbrk':'\u23B5','bbrktbrk':'\u23B6','bcong':'\u224C','bcy':'\u0431','Bcy':'\u0411','bdquo':'\u201E','becaus':'\u2235','because':'\u2235','Because':'\u2235','bemptyv':'\u29B0','bepsi':'\u03F6','bernou':'\u212C','Bernoullis':'\u212C','beta':'\u03B2','Beta':'\u0392','beth':'\u2136','between':'\u226C','bfr':'\uD835\uDD1F','Bfr':'\uD835\uDD05','bigcap':'\u22C2','bigcirc':'\u25EF','bigcup':'\u22C3','bigodot':'\u2A00','bigoplus':'\u2A01','bigotimes':'\u2A02','bigsqcup':'\u2A06','bigstar':'\u2605','bigtriangledown':'\u25BD','bigtriangleup':'\u25B3','biguplus':'\u2A04','bigvee':'\u22C1','bigwedge':'\u22C0','bkarow':'\u290D','blacklozenge':'\u29EB','blacksquare':'\u25AA','blacktriangle':'\u25B4','blacktriangledown':'\u25BE','blacktriangleleft':'\u25C2','blacktriangleright':'\u25B8','blank':'\u2423','blk12':'\u2592','blk14':'\u2591','blk34':'\u2593','block':'\u2588','bne':'=\u20E5','bnequiv':'\u2261\u20E5','bnot':'\u2310','bNot':'\u2AED','bopf':'\uD835\uDD53','Bopf':'\uD835\uDD39','bot':'\u22A5','bottom':'\u22A5','bowtie':'\u22C8','boxbox':'\u29C9','boxdl':'\u2510','boxdL':'\u2555','boxDl':'\u2556','boxDL':'\u2557','boxdr':'\u250C','boxdR':'\u2552','boxDr':'\u2553','boxDR':'\u2554','boxh':'\u2500','boxH':'\u2550','boxhd':'\u252C','boxhD':'\u2565','boxHd':'\u2564','boxHD':'\u2566','boxhu':'\u2534','boxhU':'\u2568','boxHu':'\u2567','boxHU':'\u2569','boxminus':'\u229F','boxplus':'\u229E','boxtimes':'\u22A0','boxul':'\u2518','boxuL':'\u255B','boxUl':'\u255C','boxUL':'\u255D','boxur':'\u2514','boxuR':'\u2558','boxUr':'\u2559','boxUR':'\u255A','boxv':'\u2502','boxV':'\u2551','boxvh':'\u253C','boxvH':'\u256A','boxVh':'\u256B','boxVH':'\u256C','boxvl':'\u2524','boxvL':'\u2561','boxVl':'\u2562','boxVL':'\u2563','boxvr':'\u251C','boxvR':'\u255E','boxVr':'\u255F','boxVR':'\u2560','bprime':'\u2035','breve':'\u02D8','Breve':'\u02D8','brvbar':'\xA6','bscr':'\uD835\uDCB7','Bscr':'\u212C','bsemi':'\u204F','bsim':'\u223D','bsime':'\u22CD','bsol':'\\','bsolb':'\u29C5','bsolhsub':'\u27C8','bull':'\u2022','bullet':'\u2022','bump':'\u224E','bumpe':'\u224F','bumpE':'\u2AAE','bumpeq':'\u224F','Bumpeq':'\u224E','cacute':'\u0107','Cacute':'\u0106','cap':'\u2229','Cap':'\u22D2','capand':'\u2A44','capbrcup':'\u2A49','capcap':'\u2A4B','capcup':'\u2A47','capdot':'\u2A40','CapitalDifferentialD':'\u2145','caps':'\u2229\uFE00','caret':'\u2041','caron':'\u02C7','Cayleys':'\u212D','ccaps':'\u2A4D','ccaron':'\u010D','Ccaron':'\u010C','ccedil':'\xE7','Ccedil':'\xC7','ccirc':'\u0109','Ccirc':'\u0108','Cconint':'\u2230','ccups':'\u2A4C','ccupssm':'\u2A50','cdot':'\u010B','Cdot':'\u010A','cedil':'\xB8','Cedilla':'\xB8','cemptyv':'\u29B2','cent':'\xA2','centerdot':'\xB7','CenterDot':'\xB7','cfr':'\uD835\uDD20','Cfr':'\u212D','chcy':'\u0447','CHcy':'\u0427','check':'\u2713','checkmark':'\u2713','chi':'\u03C7','Chi':'\u03A7','cir':'\u25CB','circ':'\u02C6','circeq':'\u2257','circlearrowleft':'\u21BA','circlearrowright':'\u21BB','circledast':'\u229B','circledcirc':'\u229A','circleddash':'\u229D','CircleDot':'\u2299','circledR':'\xAE','circledS':'\u24C8','CircleMinus':'\u2296','CirclePlus':'\u2295','CircleTimes':'\u2297','cire':'\u2257','cirE':'\u29C3','cirfnint':'\u2A10','cirmid':'\u2AEF','cirscir':'\u29C2','ClockwiseContourIntegral':'\u2232','CloseCurlyDoubleQuote':'\u201D','CloseCurlyQuote':'\u2019','clubs':'\u2663','clubsuit':'\u2663','colon':':','Colon':'\u2237','colone':'\u2254','Colone':'\u2A74','coloneq':'\u2254','comma':',','commat':'@','comp':'\u2201','compfn':'\u2218','complement':'\u2201','complexes':'\u2102','cong':'\u2245','congdot':'\u2A6D','Congruent':'\u2261','conint':'\u222E','Conint':'\u222F','ContourIntegral':'\u222E','copf':'\uD835\uDD54','Copf':'\u2102','coprod':'\u2210','Coproduct':'\u2210','copy':'\xA9','COPY':'\xA9','copysr':'\u2117','CounterClockwiseContourIntegral':'\u2233','crarr':'\u21B5','cross':'\u2717','Cross':'\u2A2F','cscr':'\uD835\uDCB8','Cscr':'\uD835\uDC9E','csub':'\u2ACF','csube':'\u2AD1','csup':'\u2AD0','csupe':'\u2AD2','ctdot':'\u22EF','cudarrl':'\u2938','cudarrr':'\u2935','cuepr':'\u22DE','cuesc':'\u22DF','cularr':'\u21B6','cularrp':'\u293D','cup':'\u222A','Cup':'\u22D3','cupbrcap':'\u2A48','cupcap':'\u2A46','CupCap':'\u224D','cupcup':'\u2A4A','cupdot':'\u228D','cupor':'\u2A45','cups':'\u222A\uFE00','curarr':'\u21B7','curarrm':'\u293C','curlyeqprec':'\u22DE','curlyeqsucc':'\u22DF','curlyvee':'\u22CE','curlywedge':'\u22CF','curren':'\xA4','curvearrowleft':'\u21B6','curvearrowright':'\u21B7','cuvee':'\u22CE','cuwed':'\u22CF','cwconint':'\u2232','cwint':'\u2231','cylcty':'\u232D','dagger':'\u2020','Dagger':'\u2021','daleth':'\u2138','darr':'\u2193','dArr':'\u21D3','Darr':'\u21A1','dash':'\u2010','dashv':'\u22A3','Dashv':'\u2AE4','dbkarow':'\u290F','dblac':'\u02DD','dcaron':'\u010F','Dcaron':'\u010E','dcy':'\u0434','Dcy':'\u0414','dd':'\u2146','DD':'\u2145','ddagger':'\u2021','ddarr':'\u21CA','DDotrahd':'\u2911','ddotseq':'\u2A77','deg':'\xB0','Del':'\u2207','delta':'\u03B4','Delta':'\u0394','demptyv':'\u29B1','dfisht':'\u297F','dfr':'\uD835\uDD21','Dfr':'\uD835\uDD07','dHar':'\u2965','dharl':'\u21C3','dharr':'\u21C2','DiacriticalAcute':'\xB4','DiacriticalDot':'\u02D9','DiacriticalDoubleAcute':'\u02DD','DiacriticalGrave':'`','DiacriticalTilde':'\u02DC','diam':'\u22C4','diamond':'\u22C4','Diamond':'\u22C4','diamondsuit':'\u2666','diams':'\u2666','die':'\xA8','DifferentialD':'\u2146','digamma':'\u03DD','disin':'\u22F2','div':'\xF7','divide':'\xF7','divideontimes':'\u22C7','divonx':'\u22C7','djcy':'\u0452','DJcy':'\u0402','dlcorn':'\u231E','dlcrop':'\u230D','dollar':'$','dopf':'\uD835\uDD55','Dopf':'\uD835\uDD3B','dot':'\u02D9','Dot':'\xA8','DotDot':'\u20DC','doteq':'\u2250','doteqdot':'\u2251','DotEqual':'\u2250','dotminus':'\u2238','dotplus':'\u2214','dotsquare':'\u22A1','doublebarwedge':'\u2306','DoubleContourIntegral':'\u222F','DoubleDot':'\xA8','DoubleDownArrow':'\u21D3','DoubleLeftArrow':'\u21D0','DoubleLeftRightArrow':'\u21D4','DoubleLeftTee':'\u2AE4','DoubleLongLeftArrow':'\u27F8','DoubleLongLeftRightArrow':'\u27FA','DoubleLongRightArrow':'\u27F9','DoubleRightArrow':'\u21D2','DoubleRightTee':'\u22A8','DoubleUpArrow':'\u21D1','DoubleUpDownArrow':'\u21D5','DoubleVerticalBar':'\u2225','downarrow':'\u2193','Downarrow':'\u21D3','DownArrow':'\u2193','DownArrowBar':'\u2913','DownArrowUpArrow':'\u21F5','DownBreve':'\u0311','downdownarrows':'\u21CA','downharpoonleft':'\u21C3','downharpoonright':'\u21C2','DownLeftRightVector':'\u2950','DownLeftTeeVector':'\u295E','DownLeftVector':'\u21BD','DownLeftVectorBar':'\u2956','DownRightTeeVector':'\u295F','DownRightVector':'\u21C1','DownRightVectorBar':'\u2957','DownTee':'\u22A4','DownTeeArrow':'\u21A7','drbkarow':'\u2910','drcorn':'\u231F','drcrop':'\u230C','dscr':'\uD835\uDCB9','Dscr':'\uD835\uDC9F','dscy':'\u0455','DScy':'\u0405','dsol':'\u29F6','dstrok':'\u0111','Dstrok':'\u0110','dtdot':'\u22F1','dtri':'\u25BF','dtrif':'\u25BE','duarr':'\u21F5','duhar':'\u296F','dwangle':'\u29A6','dzcy':'\u045F','DZcy':'\u040F','dzigrarr':'\u27FF','eacute':'\xE9','Eacute':'\xC9','easter':'\u2A6E','ecaron':'\u011B','Ecaron':'\u011A','ecir':'\u2256','ecirc':'\xEA','Ecirc':'\xCA','ecolon':'\u2255','ecy':'\u044D','Ecy':'\u042D','eDDot':'\u2A77','edot':'\u0117','eDot':'\u2251','Edot':'\u0116','ee':'\u2147','efDot':'\u2252','efr':'\uD835\uDD22','Efr':'\uD835\uDD08','eg':'\u2A9A','egrave':'\xE8','Egrave':'\xC8','egs':'\u2A96','egsdot':'\u2A98','el':'\u2A99','Element':'\u2208','elinters':'\u23E7','ell':'\u2113','els':'\u2A95','elsdot':'\u2A97','emacr':'\u0113','Emacr':'\u0112','empty':'\u2205','emptyset':'\u2205','EmptySmallSquare':'\u25FB','emptyv':'\u2205','EmptyVerySmallSquare':'\u25AB','emsp':'\u2003','emsp13':'\u2004','emsp14':'\u2005','eng':'\u014B','ENG':'\u014A','ensp':'\u2002','eogon':'\u0119','Eogon':'\u0118','eopf':'\uD835\uDD56','Eopf':'\uD835\uDD3C','epar':'\u22D5','eparsl':'\u29E3','eplus':'\u2A71','epsi':'\u03B5','epsilon':'\u03B5','Epsilon':'\u0395','epsiv':'\u03F5','eqcirc':'\u2256','eqcolon':'\u2255','eqsim':'\u2242','eqslantgtr':'\u2A96','eqslantless':'\u2A95','Equal':'\u2A75','equals':'=','EqualTilde':'\u2242','equest':'\u225F','Equilibrium':'\u21CC','equiv':'\u2261','equivDD':'\u2A78','eqvparsl':'\u29E5','erarr':'\u2971','erDot':'\u2253','escr':'\u212F','Escr':'\u2130','esdot':'\u2250','esim':'\u2242','Esim':'\u2A73','eta':'\u03B7','Eta':'\u0397','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','euro':'\u20AC','excl':'!','exist':'\u2203','Exists':'\u2203','expectation':'\u2130','exponentiale':'\u2147','ExponentialE':'\u2147','fallingdotseq':'\u2252','fcy':'\u0444','Fcy':'\u0424','female':'\u2640','ffilig':'\uFB03','fflig':'\uFB00','ffllig':'\uFB04','ffr':'\uD835\uDD23','Ffr':'\uD835\uDD09','filig':'\uFB01','FilledSmallSquare':'\u25FC','FilledVerySmallSquare':'\u25AA','fjlig':'fj','flat':'\u266D','fllig':'\uFB02','fltns':'\u25B1','fnof':'\u0192','fopf':'\uD835\uDD57','Fopf':'\uD835\uDD3D','forall':'\u2200','ForAll':'\u2200','fork':'\u22D4','forkv':'\u2AD9','Fouriertrf':'\u2131','fpartint':'\u2A0D','frac12':'\xBD','frac13':'\u2153','frac14':'\xBC','frac15':'\u2155','frac16':'\u2159','frac18':'\u215B','frac23':'\u2154','frac25':'\u2156','frac34':'\xBE','frac35':'\u2157','frac38':'\u215C','frac45':'\u2158','frac56':'\u215A','frac58':'\u215D','frac78':'\u215E','frasl':'\u2044','frown':'\u2322','fscr':'\uD835\uDCBB','Fscr':'\u2131','gacute':'\u01F5','gamma':'\u03B3','Gamma':'\u0393','gammad':'\u03DD','Gammad':'\u03DC','gap':'\u2A86','gbreve':'\u011F','Gbreve':'\u011E','Gcedil':'\u0122','gcirc':'\u011D','Gcirc':'\u011C','gcy':'\u0433','Gcy':'\u0413','gdot':'\u0121','Gdot':'\u0120','ge':'\u2265','gE':'\u2267','gel':'\u22DB','gEl':'\u2A8C','geq':'\u2265','geqq':'\u2267','geqslant':'\u2A7E','ges':'\u2A7E','gescc':'\u2AA9','gesdot':'\u2A80','gesdoto':'\u2A82','gesdotol':'\u2A84','gesl':'\u22DB\uFE00','gesles':'\u2A94','gfr':'\uD835\uDD24','Gfr':'\uD835\uDD0A','gg':'\u226B','Gg':'\u22D9','ggg':'\u22D9','gimel':'\u2137','gjcy':'\u0453','GJcy':'\u0403','gl':'\u2277','gla':'\u2AA5','glE':'\u2A92','glj':'\u2AA4','gnap':'\u2A8A','gnapprox':'\u2A8A','gne':'\u2A88','gnE':'\u2269','gneq':'\u2A88','gneqq':'\u2269','gnsim':'\u22E7','gopf':'\uD835\uDD58','Gopf':'\uD835\uDD3E','grave':'`','GreaterEqual':'\u2265','GreaterEqualLess':'\u22DB','GreaterFullEqual':'\u2267','GreaterGreater':'\u2AA2','GreaterLess':'\u2277','GreaterSlantEqual':'\u2A7E','GreaterTilde':'\u2273','gscr':'\u210A','Gscr':'\uD835\uDCA2','gsim':'\u2273','gsime':'\u2A8E','gsiml':'\u2A90','gt':'>','Gt':'\u226B','GT':'>','gtcc':'\u2AA7','gtcir':'\u2A7A','gtdot':'\u22D7','gtlPar':'\u2995','gtquest':'\u2A7C','gtrapprox':'\u2A86','gtrarr':'\u2978','gtrdot':'\u22D7','gtreqless':'\u22DB','gtreqqless':'\u2A8C','gtrless':'\u2277','gtrsim':'\u2273','gvertneqq':'\u2269\uFE00','gvnE':'\u2269\uFE00','Hacek':'\u02C7','hairsp':'\u200A','half':'\xBD','hamilt':'\u210B','hardcy':'\u044A','HARDcy':'\u042A','harr':'\u2194','hArr':'\u21D4','harrcir':'\u2948','harrw':'\u21AD','Hat':'^','hbar':'\u210F','hcirc':'\u0125','Hcirc':'\u0124','hearts':'\u2665','heartsuit':'\u2665','hellip':'\u2026','hercon':'\u22B9','hfr':'\uD835\uDD25','Hfr':'\u210C','HilbertSpace':'\u210B','hksearow':'\u2925','hkswarow':'\u2926','hoarr':'\u21FF','homtht':'\u223B','hookleftarrow':'\u21A9','hookrightarrow':'\u21AA','hopf':'\uD835\uDD59','Hopf':'\u210D','horbar':'\u2015','HorizontalLine':'\u2500','hscr':'\uD835\uDCBD','Hscr':'\u210B','hslash':'\u210F','hstrok':'\u0127','Hstrok':'\u0126','HumpDownHump':'\u224E','HumpEqual':'\u224F','hybull':'\u2043','hyphen':'\u2010','iacute':'\xED','Iacute':'\xCD','ic':'\u2063','icirc':'\xEE','Icirc':'\xCE','icy':'\u0438','Icy':'\u0418','Idot':'\u0130','iecy':'\u0435','IEcy':'\u0415','iexcl':'\xA1','iff':'\u21D4','ifr':'\uD835\uDD26','Ifr':'\u2111','igrave':'\xEC','Igrave':'\xCC','ii':'\u2148','iiiint':'\u2A0C','iiint':'\u222D','iinfin':'\u29DC','iiota':'\u2129','ijlig':'\u0133','IJlig':'\u0132','Im':'\u2111','imacr':'\u012B','Imacr':'\u012A','image':'\u2111','ImaginaryI':'\u2148','imagline':'\u2110','imagpart':'\u2111','imath':'\u0131','imof':'\u22B7','imped':'\u01B5','Implies':'\u21D2','in':'\u2208','incare':'\u2105','infin':'\u221E','infintie':'\u29DD','inodot':'\u0131','int':'\u222B','Int':'\u222C','intcal':'\u22BA','integers':'\u2124','Integral':'\u222B','intercal':'\u22BA','Intersection':'\u22C2','intlarhk':'\u2A17','intprod':'\u2A3C','InvisibleComma':'\u2063','InvisibleTimes':'\u2062','iocy':'\u0451','IOcy':'\u0401','iogon':'\u012F','Iogon':'\u012E','iopf':'\uD835\uDD5A','Iopf':'\uD835\uDD40','iota':'\u03B9','Iota':'\u0399','iprod':'\u2A3C','iquest':'\xBF','iscr':'\uD835\uDCBE','Iscr':'\u2110','isin':'\u2208','isindot':'\u22F5','isinE':'\u22F9','isins':'\u22F4','isinsv':'\u22F3','isinv':'\u2208','it':'\u2062','itilde':'\u0129','Itilde':'\u0128','iukcy':'\u0456','Iukcy':'\u0406','iuml':'\xEF','Iuml':'\xCF','jcirc':'\u0135','Jcirc':'\u0134','jcy':'\u0439','Jcy':'\u0419','jfr':'\uD835\uDD27','Jfr':'\uD835\uDD0D','jmath':'\u0237','jopf':'\uD835\uDD5B','Jopf':'\uD835\uDD41','jscr':'\uD835\uDCBF','Jscr':'\uD835\uDCA5','jsercy':'\u0458','Jsercy':'\u0408','jukcy':'\u0454','Jukcy':'\u0404','kappa':'\u03BA','Kappa':'\u039A','kappav':'\u03F0','kcedil':'\u0137','Kcedil':'\u0136','kcy':'\u043A','Kcy':'\u041A','kfr':'\uD835\uDD28','Kfr':'\uD835\uDD0E','kgreen':'\u0138','khcy':'\u0445','KHcy':'\u0425','kjcy':'\u045C','KJcy':'\u040C','kopf':'\uD835\uDD5C','Kopf':'\uD835\uDD42','kscr':'\uD835\uDCC0','Kscr':'\uD835\uDCA6','lAarr':'\u21DA','lacute':'\u013A','Lacute':'\u0139','laemptyv':'\u29B4','lagran':'\u2112','lambda':'\u03BB','Lambda':'\u039B','lang':'\u27E8','Lang':'\u27EA','langd':'\u2991','langle':'\u27E8','lap':'\u2A85','Laplacetrf':'\u2112','laquo':'\xAB','larr':'\u2190','lArr':'\u21D0','Larr':'\u219E','larrb':'\u21E4','larrbfs':'\u291F','larrfs':'\u291D','larrhk':'\u21A9','larrlp':'\u21AB','larrpl':'\u2939','larrsim':'\u2973','larrtl':'\u21A2','lat':'\u2AAB','latail':'\u2919','lAtail':'\u291B','late':'\u2AAD','lates':'\u2AAD\uFE00','lbarr':'\u290C','lBarr':'\u290E','lbbrk':'\u2772','lbrace':'{','lbrack':'[','lbrke':'\u298B','lbrksld':'\u298F','lbrkslu':'\u298D','lcaron':'\u013E','Lcaron':'\u013D','lcedil':'\u013C','Lcedil':'\u013B','lceil':'\u2308','lcub':'{','lcy':'\u043B','Lcy':'\u041B','ldca':'\u2936','ldquo':'\u201C','ldquor':'\u201E','ldrdhar':'\u2967','ldrushar':'\u294B','ldsh':'\u21B2','le':'\u2264','lE':'\u2266','LeftAngleBracket':'\u27E8','leftarrow':'\u2190','Leftarrow':'\u21D0','LeftArrow':'\u2190','LeftArrowBar':'\u21E4','LeftArrowRightArrow':'\u21C6','leftarrowtail':'\u21A2','LeftCeiling':'\u2308','LeftDoubleBracket':'\u27E6','LeftDownTeeVector':'\u2961','LeftDownVector':'\u21C3','LeftDownVectorBar':'\u2959','LeftFloor':'\u230A','leftharpoondown':'\u21BD','leftharpoonup':'\u21BC','leftleftarrows':'\u21C7','leftrightarrow':'\u2194','Leftrightarrow':'\u21D4','LeftRightArrow':'\u2194','leftrightarrows':'\u21C6','leftrightharpoons':'\u21CB','leftrightsquigarrow':'\u21AD','LeftRightVector':'\u294E','LeftTee':'\u22A3','LeftTeeArrow':'\u21A4','LeftTeeVector':'\u295A','leftthreetimes':'\u22CB','LeftTriangle':'\u22B2','LeftTriangleBar':'\u29CF','LeftTriangleEqual':'\u22B4','LeftUpDownVector':'\u2951','LeftUpTeeVector':'\u2960','LeftUpVector':'\u21BF','LeftUpVectorBar':'\u2958','LeftVector':'\u21BC','LeftVectorBar':'\u2952','leg':'\u22DA','lEg':'\u2A8B','leq':'\u2264','leqq':'\u2266','leqslant':'\u2A7D','les':'\u2A7D','lescc':'\u2AA8','lesdot':'\u2A7F','lesdoto':'\u2A81','lesdotor':'\u2A83','lesg':'\u22DA\uFE00','lesges':'\u2A93','lessapprox':'\u2A85','lessdot':'\u22D6','lesseqgtr':'\u22DA','lesseqqgtr':'\u2A8B','LessEqualGreater':'\u22DA','LessFullEqual':'\u2266','LessGreater':'\u2276','lessgtr':'\u2276','LessLess':'\u2AA1','lesssim':'\u2272','LessSlantEqual':'\u2A7D','LessTilde':'\u2272','lfisht':'\u297C','lfloor':'\u230A','lfr':'\uD835\uDD29','Lfr':'\uD835\uDD0F','lg':'\u2276','lgE':'\u2A91','lHar':'\u2962','lhard':'\u21BD','lharu':'\u21BC','lharul':'\u296A','lhblk':'\u2584','ljcy':'\u0459','LJcy':'\u0409','ll':'\u226A','Ll':'\u22D8','llarr':'\u21C7','llcorner':'\u231E','Lleftarrow':'\u21DA','llhard':'\u296B','lltri':'\u25FA','lmidot':'\u0140','Lmidot':'\u013F','lmoust':'\u23B0','lmoustache':'\u23B0','lnap':'\u2A89','lnapprox':'\u2A89','lne':'\u2A87','lnE':'\u2268','lneq':'\u2A87','lneqq':'\u2268','lnsim':'\u22E6','loang':'\u27EC','loarr':'\u21FD','lobrk':'\u27E6','longleftarrow':'\u27F5','Longleftarrow':'\u27F8','LongLeftArrow':'\u27F5','longleftrightarrow':'\u27F7','Longleftrightarrow':'\u27FA','LongLeftRightArrow':'\u27F7','longmapsto':'\u27FC','longrightarrow':'\u27F6','Longrightarrow':'\u27F9','LongRightArrow':'\u27F6','looparrowleft':'\u21AB','looparrowright':'\u21AC','lopar':'\u2985','lopf':'\uD835\uDD5D','Lopf':'\uD835\uDD43','loplus':'\u2A2D','lotimes':'\u2A34','lowast':'\u2217','lowbar':'_','LowerLeftArrow':'\u2199','LowerRightArrow':'\u2198','loz':'\u25CA','lozenge':'\u25CA','lozf':'\u29EB','lpar':'(','lparlt':'\u2993','lrarr':'\u21C6','lrcorner':'\u231F','lrhar':'\u21CB','lrhard':'\u296D','lrm':'\u200E','lrtri':'\u22BF','lsaquo':'\u2039','lscr':'\uD835\uDCC1','Lscr':'\u2112','lsh':'\u21B0','Lsh':'\u21B0','lsim':'\u2272','lsime':'\u2A8D','lsimg':'\u2A8F','lsqb':'[','lsquo':'\u2018','lsquor':'\u201A','lstrok':'\u0142','Lstrok':'\u0141','lt':'<','Lt':'\u226A','LT':'<','ltcc':'\u2AA6','ltcir':'\u2A79','ltdot':'\u22D6','lthree':'\u22CB','ltimes':'\u22C9','ltlarr':'\u2976','ltquest':'\u2A7B','ltri':'\u25C3','ltrie':'\u22B4','ltrif':'\u25C2','ltrPar':'\u2996','lurdshar':'\u294A','luruhar':'\u2966','lvertneqq':'\u2268\uFE00','lvnE':'\u2268\uFE00','macr':'\xAF','male':'\u2642','malt':'\u2720','maltese':'\u2720','map':'\u21A6','Map':'\u2905','mapsto':'\u21A6','mapstodown':'\u21A7','mapstoleft':'\u21A4','mapstoup':'\u21A5','marker':'\u25AE','mcomma':'\u2A29','mcy':'\u043C','Mcy':'\u041C','mdash':'\u2014','mDDot':'\u223A','measuredangle':'\u2221','MediumSpace':'\u205F','Mellintrf':'\u2133','mfr':'\uD835\uDD2A','Mfr':'\uD835\uDD10','mho':'\u2127','micro':'\xB5','mid':'\u2223','midast':'*','midcir':'\u2AF0','middot':'\xB7','minus':'\u2212','minusb':'\u229F','minusd':'\u2238','minusdu':'\u2A2A','MinusPlus':'\u2213','mlcp':'\u2ADB','mldr':'\u2026','mnplus':'\u2213','models':'\u22A7','mopf':'\uD835\uDD5E','Mopf':'\uD835\uDD44','mp':'\u2213','mscr':'\uD835\uDCC2','Mscr':'\u2133','mstpos':'\u223E','mu':'\u03BC','Mu':'\u039C','multimap':'\u22B8','mumap':'\u22B8','nabla':'\u2207','nacute':'\u0144','Nacute':'\u0143','nang':'\u2220\u20D2','nap':'\u2249','napE':'\u2A70\u0338','napid':'\u224B\u0338','napos':'\u0149','napprox':'\u2249','natur':'\u266E','natural':'\u266E','naturals':'\u2115','nbsp':'\xA0','nbump':'\u224E\u0338','nbumpe':'\u224F\u0338','ncap':'\u2A43','ncaron':'\u0148','Ncaron':'\u0147','ncedil':'\u0146','Ncedil':'\u0145','ncong':'\u2247','ncongdot':'\u2A6D\u0338','ncup':'\u2A42','ncy':'\u043D','Ncy':'\u041D','ndash':'\u2013','ne':'\u2260','nearhk':'\u2924','nearr':'\u2197','neArr':'\u21D7','nearrow':'\u2197','nedot':'\u2250\u0338','NegativeMediumSpace':'\u200B','NegativeThickSpace':'\u200B','NegativeThinSpace':'\u200B','NegativeVeryThinSpace':'\u200B','nequiv':'\u2262','nesear':'\u2928','nesim':'\u2242\u0338','NestedGreaterGreater':'\u226B','NestedLessLess':'\u226A','NewLine':'\n','nexist':'\u2204','nexists':'\u2204','nfr':'\uD835\uDD2B','Nfr':'\uD835\uDD11','nge':'\u2271','ngE':'\u2267\u0338','ngeq':'\u2271','ngeqq':'\u2267\u0338','ngeqslant':'\u2A7E\u0338','nges':'\u2A7E\u0338','nGg':'\u22D9\u0338','ngsim':'\u2275','ngt':'\u226F','nGt':'\u226B\u20D2','ngtr':'\u226F','nGtv':'\u226B\u0338','nharr':'\u21AE','nhArr':'\u21CE','nhpar':'\u2AF2','ni':'\u220B','nis':'\u22FC','nisd':'\u22FA','niv':'\u220B','njcy':'\u045A','NJcy':'\u040A','nlarr':'\u219A','nlArr':'\u21CD','nldr':'\u2025','nle':'\u2270','nlE':'\u2266\u0338','nleftarrow':'\u219A','nLeftarrow':'\u21CD','nleftrightarrow':'\u21AE','nLeftrightarrow':'\u21CE','nleq':'\u2270','nleqq':'\u2266\u0338','nleqslant':'\u2A7D\u0338','nles':'\u2A7D\u0338','nless':'\u226E','nLl':'\u22D8\u0338','nlsim':'\u2274','nlt':'\u226E','nLt':'\u226A\u20D2','nltri':'\u22EA','nltrie':'\u22EC','nLtv':'\u226A\u0338','nmid':'\u2224','NoBreak':'\u2060','NonBreakingSpace':'\xA0','nopf':'\uD835\uDD5F','Nopf':'\u2115','not':'\xAC','Not':'\u2AEC','NotCongruent':'\u2262','NotCupCap':'\u226D','NotDoubleVerticalBar':'\u2226','NotElement':'\u2209','NotEqual':'\u2260','NotEqualTilde':'\u2242\u0338','NotExists':'\u2204','NotGreater':'\u226F','NotGreaterEqual':'\u2271','NotGreaterFullEqual':'\u2267\u0338','NotGreaterGreater':'\u226B\u0338','NotGreaterLess':'\u2279','NotGreaterSlantEqual':'\u2A7E\u0338','NotGreaterTilde':'\u2275','NotHumpDownHump':'\u224E\u0338','NotHumpEqual':'\u224F\u0338','notin':'\u2209','notindot':'\u22F5\u0338','notinE':'\u22F9\u0338','notinva':'\u2209','notinvb':'\u22F7','notinvc':'\u22F6','NotLeftTriangle':'\u22EA','NotLeftTriangleBar':'\u29CF\u0338','NotLeftTriangleEqual':'\u22EC','NotLess':'\u226E','NotLessEqual':'\u2270','NotLessGreater':'\u2278','NotLessLess':'\u226A\u0338','NotLessSlantEqual':'\u2A7D\u0338','NotLessTilde':'\u2274','NotNestedGreaterGreater':'\u2AA2\u0338','NotNestedLessLess':'\u2AA1\u0338','notni':'\u220C','notniva':'\u220C','notnivb':'\u22FE','notnivc':'\u22FD','NotPrecedes':'\u2280','NotPrecedesEqual':'\u2AAF\u0338','NotPrecedesSlantEqual':'\u22E0','NotReverseElement':'\u220C','NotRightTriangle':'\u22EB','NotRightTriangleBar':'\u29D0\u0338','NotRightTriangleEqual':'\u22ED','NotSquareSubset':'\u228F\u0338','NotSquareSubsetEqual':'\u22E2','NotSquareSuperset':'\u2290\u0338','NotSquareSupersetEqual':'\u22E3','NotSubset':'\u2282\u20D2','NotSubsetEqual':'\u2288','NotSucceeds':'\u2281','NotSucceedsEqual':'\u2AB0\u0338','NotSucceedsSlantEqual':'\u22E1','NotSucceedsTilde':'\u227F\u0338','NotSuperset':'\u2283\u20D2','NotSupersetEqual':'\u2289','NotTilde':'\u2241','NotTildeEqual':'\u2244','NotTildeFullEqual':'\u2247','NotTildeTilde':'\u2249','NotVerticalBar':'\u2224','npar':'\u2226','nparallel':'\u2226','nparsl':'\u2AFD\u20E5','npart':'\u2202\u0338','npolint':'\u2A14','npr':'\u2280','nprcue':'\u22E0','npre':'\u2AAF\u0338','nprec':'\u2280','npreceq':'\u2AAF\u0338','nrarr':'\u219B','nrArr':'\u21CF','nrarrc':'\u2933\u0338','nrarrw':'\u219D\u0338','nrightarrow':'\u219B','nRightarrow':'\u21CF','nrtri':'\u22EB','nrtrie':'\u22ED','nsc':'\u2281','nsccue':'\u22E1','nsce':'\u2AB0\u0338','nscr':'\uD835\uDCC3','Nscr':'\uD835\uDCA9','nshortmid':'\u2224','nshortparallel':'\u2226','nsim':'\u2241','nsime':'\u2244','nsimeq':'\u2244','nsmid':'\u2224','nspar':'\u2226','nsqsube':'\u22E2','nsqsupe':'\u22E3','nsub':'\u2284','nsube':'\u2288','nsubE':'\u2AC5\u0338','nsubset':'\u2282\u20D2','nsubseteq':'\u2288','nsubseteqq':'\u2AC5\u0338','nsucc':'\u2281','nsucceq':'\u2AB0\u0338','nsup':'\u2285','nsupe':'\u2289','nsupE':'\u2AC6\u0338','nsupset':'\u2283\u20D2','nsupseteq':'\u2289','nsupseteqq':'\u2AC6\u0338','ntgl':'\u2279','ntilde':'\xF1','Ntilde':'\xD1','ntlg':'\u2278','ntriangleleft':'\u22EA','ntrianglelefteq':'\u22EC','ntriangleright':'\u22EB','ntrianglerighteq':'\u22ED','nu':'\u03BD','Nu':'\u039D','num':'#','numero':'\u2116','numsp':'\u2007','nvap':'\u224D\u20D2','nvdash':'\u22AC','nvDash':'\u22AD','nVdash':'\u22AE','nVDash':'\u22AF','nvge':'\u2265\u20D2','nvgt':'>\u20D2','nvHarr':'\u2904','nvinfin':'\u29DE','nvlArr':'\u2902','nvle':'\u2264\u20D2','nvlt':'<\u20D2','nvltrie':'\u22B4\u20D2','nvrArr':'\u2903','nvrtrie':'\u22B5\u20D2','nvsim':'\u223C\u20D2','nwarhk':'\u2923','nwarr':'\u2196','nwArr':'\u21D6','nwarrow':'\u2196','nwnear':'\u2927','oacute':'\xF3','Oacute':'\xD3','oast':'\u229B','ocir':'\u229A','ocirc':'\xF4','Ocirc':'\xD4','ocy':'\u043E','Ocy':'\u041E','odash':'\u229D','odblac':'\u0151','Odblac':'\u0150','odiv':'\u2A38','odot':'\u2299','odsold':'\u29BC','oelig':'\u0153','OElig':'\u0152','ofcir':'\u29BF','ofr':'\uD835\uDD2C','Ofr':'\uD835\uDD12','ogon':'\u02DB','ograve':'\xF2','Ograve':'\xD2','ogt':'\u29C1','ohbar':'\u29B5','ohm':'\u03A9','oint':'\u222E','olarr':'\u21BA','olcir':'\u29BE','olcross':'\u29BB','oline':'\u203E','olt':'\u29C0','omacr':'\u014D','Omacr':'\u014C','omega':'\u03C9','Omega':'\u03A9','omicron':'\u03BF','Omicron':'\u039F','omid':'\u29B6','ominus':'\u2296','oopf':'\uD835\uDD60','Oopf':'\uD835\uDD46','opar':'\u29B7','OpenCurlyDoubleQuote':'\u201C','OpenCurlyQuote':'\u2018','operp':'\u29B9','oplus':'\u2295','or':'\u2228','Or':'\u2A54','orarr':'\u21BB','ord':'\u2A5D','order':'\u2134','orderof':'\u2134','ordf':'\xAA','ordm':'\xBA','origof':'\u22B6','oror':'\u2A56','orslope':'\u2A57','orv':'\u2A5B','oS':'\u24C8','oscr':'\u2134','Oscr':'\uD835\uDCAA','oslash':'\xF8','Oslash':'\xD8','osol':'\u2298','otilde':'\xF5','Otilde':'\xD5','otimes':'\u2297','Otimes':'\u2A37','otimesas':'\u2A36','ouml':'\xF6','Ouml':'\xD6','ovbar':'\u233D','OverBar':'\u203E','OverBrace':'\u23DE','OverBracket':'\u23B4','OverParenthesis':'\u23DC','par':'\u2225','para':'\xB6','parallel':'\u2225','parsim':'\u2AF3','parsl':'\u2AFD','part':'\u2202','PartialD':'\u2202','pcy':'\u043F','Pcy':'\u041F','percnt':'%','period':'.','permil':'\u2030','perp':'\u22A5','pertenk':'\u2031','pfr':'\uD835\uDD2D','Pfr':'\uD835\uDD13','phi':'\u03C6','Phi':'\u03A6','phiv':'\u03D5','phmmat':'\u2133','phone':'\u260E','pi':'\u03C0','Pi':'\u03A0','pitchfork':'\u22D4','piv':'\u03D6','planck':'\u210F','planckh':'\u210E','plankv':'\u210F','plus':'+','plusacir':'\u2A23','plusb':'\u229E','pluscir':'\u2A22','plusdo':'\u2214','plusdu':'\u2A25','pluse':'\u2A72','PlusMinus':'\xB1','plusmn':'\xB1','plussim':'\u2A26','plustwo':'\u2A27','pm':'\xB1','Poincareplane':'\u210C','pointint':'\u2A15','popf':'\uD835\uDD61','Popf':'\u2119','pound':'\xA3','pr':'\u227A','Pr':'\u2ABB','prap':'\u2AB7','prcue':'\u227C','pre':'\u2AAF','prE':'\u2AB3','prec':'\u227A','precapprox':'\u2AB7','preccurlyeq':'\u227C','Precedes':'\u227A','PrecedesEqual':'\u2AAF','PrecedesSlantEqual':'\u227C','PrecedesTilde':'\u227E','preceq':'\u2AAF','precnapprox':'\u2AB9','precneqq':'\u2AB5','precnsim':'\u22E8','precsim':'\u227E','prime':'\u2032','Prime':'\u2033','primes':'\u2119','prnap':'\u2AB9','prnE':'\u2AB5','prnsim':'\u22E8','prod':'\u220F','Product':'\u220F','profalar':'\u232E','profline':'\u2312','profsurf':'\u2313','prop':'\u221D','Proportion':'\u2237','Proportional':'\u221D','propto':'\u221D','prsim':'\u227E','prurel':'\u22B0','pscr':'\uD835\uDCC5','Pscr':'\uD835\uDCAB','psi':'\u03C8','Psi':'\u03A8','puncsp':'\u2008','qfr':'\uD835\uDD2E','Qfr':'\uD835\uDD14','qint':'\u2A0C','qopf':'\uD835\uDD62','Qopf':'\u211A','qprime':'\u2057','qscr':'\uD835\uDCC6','Qscr':'\uD835\uDCAC','quaternions':'\u210D','quatint':'\u2A16','quest':'?','questeq':'\u225F','quot':'"','QUOT':'"','rAarr':'\u21DB','race':'\u223D\u0331','racute':'\u0155','Racute':'\u0154','radic':'\u221A','raemptyv':'\u29B3','rang':'\u27E9','Rang':'\u27EB','rangd':'\u2992','range':'\u29A5','rangle':'\u27E9','raquo':'\xBB','rarr':'\u2192','rArr':'\u21D2','Rarr':'\u21A0','rarrap':'\u2975','rarrb':'\u21E5','rarrbfs':'\u2920','rarrc':'\u2933','rarrfs':'\u291E','rarrhk':'\u21AA','rarrlp':'\u21AC','rarrpl':'\u2945','rarrsim':'\u2974','rarrtl':'\u21A3','Rarrtl':'\u2916','rarrw':'\u219D','ratail':'\u291A','rAtail':'\u291C','ratio':'\u2236','rationals':'\u211A','rbarr':'\u290D','rBarr':'\u290F','RBarr':'\u2910','rbbrk':'\u2773','rbrace':'}','rbrack':']','rbrke':'\u298C','rbrksld':'\u298E','rbrkslu':'\u2990','rcaron':'\u0159','Rcaron':'\u0158','rcedil':'\u0157','Rcedil':'\u0156','rceil':'\u2309','rcub':'}','rcy':'\u0440','Rcy':'\u0420','rdca':'\u2937','rdldhar':'\u2969','rdquo':'\u201D','rdquor':'\u201D','rdsh':'\u21B3','Re':'\u211C','real':'\u211C','realine':'\u211B','realpart':'\u211C','reals':'\u211D','rect':'\u25AD','reg':'\xAE','REG':'\xAE','ReverseElement':'\u220B','ReverseEquilibrium':'\u21CB','ReverseUpEquilibrium':'\u296F','rfisht':'\u297D','rfloor':'\u230B','rfr':'\uD835\uDD2F','Rfr':'\u211C','rHar':'\u2964','rhard':'\u21C1','rharu':'\u21C0','rharul':'\u296C','rho':'\u03C1','Rho':'\u03A1','rhov':'\u03F1','RightAngleBracket':'\u27E9','rightarrow':'\u2192','Rightarrow':'\u21D2','RightArrow':'\u2192','RightArrowBar':'\u21E5','RightArrowLeftArrow':'\u21C4','rightarrowtail':'\u21A3','RightCeiling':'\u2309','RightDoubleBracket':'\u27E7','RightDownTeeVector':'\u295D','RightDownVector':'\u21C2','RightDownVectorBar':'\u2955','RightFloor':'\u230B','rightharpoondown':'\u21C1','rightharpoonup':'\u21C0','rightleftarrows':'\u21C4','rightleftharpoons':'\u21CC','rightrightarrows':'\u21C9','rightsquigarrow':'\u219D','RightTee':'\u22A2','RightTeeArrow':'\u21A6','RightTeeVector':'\u295B','rightthreetimes':'\u22CC','RightTriangle':'\u22B3','RightTriangleBar':'\u29D0','RightTriangleEqual':'\u22B5','RightUpDownVector':'\u294F','RightUpTeeVector':'\u295C','RightUpVector':'\u21BE','RightUpVectorBar':'\u2954','RightVector':'\u21C0','RightVectorBar':'\u2953','ring':'\u02DA','risingdotseq':'\u2253','rlarr':'\u21C4','rlhar':'\u21CC','rlm':'\u200F','rmoust':'\u23B1','rmoustache':'\u23B1','rnmid':'\u2AEE','roang':'\u27ED','roarr':'\u21FE','robrk':'\u27E7','ropar':'\u2986','ropf':'\uD835\uDD63','Ropf':'\u211D','roplus':'\u2A2E','rotimes':'\u2A35','RoundImplies':'\u2970','rpar':')','rpargt':'\u2994','rppolint':'\u2A12','rrarr':'\u21C9','Rrightarrow':'\u21DB','rsaquo':'\u203A','rscr':'\uD835\uDCC7','Rscr':'\u211B','rsh':'\u21B1','Rsh':'\u21B1','rsqb':']','rsquo':'\u2019','rsquor':'\u2019','rthree':'\u22CC','rtimes':'\u22CA','rtri':'\u25B9','rtrie':'\u22B5','rtrif':'\u25B8','rtriltri':'\u29CE','RuleDelayed':'\u29F4','ruluhar':'\u2968','rx':'\u211E','sacute':'\u015B','Sacute':'\u015A','sbquo':'\u201A','sc':'\u227B','Sc':'\u2ABC','scap':'\u2AB8','scaron':'\u0161','Scaron':'\u0160','sccue':'\u227D','sce':'\u2AB0','scE':'\u2AB4','scedil':'\u015F','Scedil':'\u015E','scirc':'\u015D','Scirc':'\u015C','scnap':'\u2ABA','scnE':'\u2AB6','scnsim':'\u22E9','scpolint':'\u2A13','scsim':'\u227F','scy':'\u0441','Scy':'\u0421','sdot':'\u22C5','sdotb':'\u22A1','sdote':'\u2A66','searhk':'\u2925','searr':'\u2198','seArr':'\u21D8','searrow':'\u2198','sect':'\xA7','semi':';','seswar':'\u2929','setminus':'\u2216','setmn':'\u2216','sext':'\u2736','sfr':'\uD835\uDD30','Sfr':'\uD835\uDD16','sfrown':'\u2322','sharp':'\u266F','shchcy':'\u0449','SHCHcy':'\u0429','shcy':'\u0448','SHcy':'\u0428','ShortDownArrow':'\u2193','ShortLeftArrow':'\u2190','shortmid':'\u2223','shortparallel':'\u2225','ShortRightArrow':'\u2192','ShortUpArrow':'\u2191','shy':'\xAD','sigma':'\u03C3','Sigma':'\u03A3','sigmaf':'\u03C2','sigmav':'\u03C2','sim':'\u223C','simdot':'\u2A6A','sime':'\u2243','simeq':'\u2243','simg':'\u2A9E','simgE':'\u2AA0','siml':'\u2A9D','simlE':'\u2A9F','simne':'\u2246','simplus':'\u2A24','simrarr':'\u2972','slarr':'\u2190','SmallCircle':'\u2218','smallsetminus':'\u2216','smashp':'\u2A33','smeparsl':'\u29E4','smid':'\u2223','smile':'\u2323','smt':'\u2AAA','smte':'\u2AAC','smtes':'\u2AAC\uFE00','softcy':'\u044C','SOFTcy':'\u042C','sol':'/','solb':'\u29C4','solbar':'\u233F','sopf':'\uD835\uDD64','Sopf':'\uD835\uDD4A','spades':'\u2660','spadesuit':'\u2660','spar':'\u2225','sqcap':'\u2293','sqcaps':'\u2293\uFE00','sqcup':'\u2294','sqcups':'\u2294\uFE00','Sqrt':'\u221A','sqsub':'\u228F','sqsube':'\u2291','sqsubset':'\u228F','sqsubseteq':'\u2291','sqsup':'\u2290','sqsupe':'\u2292','sqsupset':'\u2290','sqsupseteq':'\u2292','squ':'\u25A1','square':'\u25A1','Square':'\u25A1','SquareIntersection':'\u2293','SquareSubset':'\u228F','SquareSubsetEqual':'\u2291','SquareSuperset':'\u2290','SquareSupersetEqual':'\u2292','SquareUnion':'\u2294','squarf':'\u25AA','squf':'\u25AA','srarr':'\u2192','sscr':'\uD835\uDCC8','Sscr':'\uD835\uDCAE','ssetmn':'\u2216','ssmile':'\u2323','sstarf':'\u22C6','star':'\u2606','Star':'\u22C6','starf':'\u2605','straightepsilon':'\u03F5','straightphi':'\u03D5','strns':'\xAF','sub':'\u2282','Sub':'\u22D0','subdot':'\u2ABD','sube':'\u2286','subE':'\u2AC5','subedot':'\u2AC3','submult':'\u2AC1','subne':'\u228A','subnE':'\u2ACB','subplus':'\u2ABF','subrarr':'\u2979','subset':'\u2282','Subset':'\u22D0','subseteq':'\u2286','subseteqq':'\u2AC5','SubsetEqual':'\u2286','subsetneq':'\u228A','subsetneqq':'\u2ACB','subsim':'\u2AC7','subsub':'\u2AD5','subsup':'\u2AD3','succ':'\u227B','succapprox':'\u2AB8','succcurlyeq':'\u227D','Succeeds':'\u227B','SucceedsEqual':'\u2AB0','SucceedsSlantEqual':'\u227D','SucceedsTilde':'\u227F','succeq':'\u2AB0','succnapprox':'\u2ABA','succneqq':'\u2AB6','succnsim':'\u22E9','succsim':'\u227F','SuchThat':'\u220B','sum':'\u2211','Sum':'\u2211','sung':'\u266A','sup':'\u2283','Sup':'\u22D1','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','supdot':'\u2ABE','supdsub':'\u2AD8','supe':'\u2287','supE':'\u2AC6','supedot':'\u2AC4','Superset':'\u2283','SupersetEqual':'\u2287','suphsol':'\u27C9','suphsub':'\u2AD7','suplarr':'\u297B','supmult':'\u2AC2','supne':'\u228B','supnE':'\u2ACC','supplus':'\u2AC0','supset':'\u2283','Supset':'\u22D1','supseteq':'\u2287','supseteqq':'\u2AC6','supsetneq':'\u228B','supsetneqq':'\u2ACC','supsim':'\u2AC8','supsub':'\u2AD4','supsup':'\u2AD6','swarhk':'\u2926','swarr':'\u2199','swArr':'\u21D9','swarrow':'\u2199','swnwar':'\u292A','szlig':'\xDF','Tab':'\t','target':'\u2316','tau':'\u03C4','Tau':'\u03A4','tbrk':'\u23B4','tcaron':'\u0165','Tcaron':'\u0164','tcedil':'\u0163','Tcedil':'\u0162','tcy':'\u0442','Tcy':'\u0422','tdot':'\u20DB','telrec':'\u2315','tfr':'\uD835\uDD31','Tfr':'\uD835\uDD17','there4':'\u2234','therefore':'\u2234','Therefore':'\u2234','theta':'\u03B8','Theta':'\u0398','thetasym':'\u03D1','thetav':'\u03D1','thickapprox':'\u2248','thicksim':'\u223C','ThickSpace':'\u205F\u200A','thinsp':'\u2009','ThinSpace':'\u2009','thkap':'\u2248','thksim':'\u223C','thorn':'\xFE','THORN':'\xDE','tilde':'\u02DC','Tilde':'\u223C','TildeEqual':'\u2243','TildeFullEqual':'\u2245','TildeTilde':'\u2248','times':'\xD7','timesb':'\u22A0','timesbar':'\u2A31','timesd':'\u2A30','tint':'\u222D','toea':'\u2928','top':'\u22A4','topbot':'\u2336','topcir':'\u2AF1','topf':'\uD835\uDD65','Topf':'\uD835\uDD4B','topfork':'\u2ADA','tosa':'\u2929','tprime':'\u2034','trade':'\u2122','TRADE':'\u2122','triangle':'\u25B5','triangledown':'\u25BF','triangleleft':'\u25C3','trianglelefteq':'\u22B4','triangleq':'\u225C','triangleright':'\u25B9','trianglerighteq':'\u22B5','tridot':'\u25EC','trie':'\u225C','triminus':'\u2A3A','TripleDot':'\u20DB','triplus':'\u2A39','trisb':'\u29CD','tritime':'\u2A3B','trpezium':'\u23E2','tscr':'\uD835\uDCC9','Tscr':'\uD835\uDCAF','tscy':'\u0446','TScy':'\u0426','tshcy':'\u045B','TSHcy':'\u040B','tstrok':'\u0167','Tstrok':'\u0166','twixt':'\u226C','twoheadleftarrow':'\u219E','twoheadrightarrow':'\u21A0','uacute':'\xFA','Uacute':'\xDA','uarr':'\u2191','uArr':'\u21D1','Uarr':'\u219F','Uarrocir':'\u2949','ubrcy':'\u045E','Ubrcy':'\u040E','ubreve':'\u016D','Ubreve':'\u016C','ucirc':'\xFB','Ucirc':'\xDB','ucy':'\u0443','Ucy':'\u0423','udarr':'\u21C5','udblac':'\u0171','Udblac':'\u0170','udhar':'\u296E','ufisht':'\u297E','ufr':'\uD835\uDD32','Ufr':'\uD835\uDD18','ugrave':'\xF9','Ugrave':'\xD9','uHar':'\u2963','uharl':'\u21BF','uharr':'\u21BE','uhblk':'\u2580','ulcorn':'\u231C','ulcorner':'\u231C','ulcrop':'\u230F','ultri':'\u25F8','umacr':'\u016B','Umacr':'\u016A','uml':'\xA8','UnderBar':'_','UnderBrace':'\u23DF','UnderBracket':'\u23B5','UnderParenthesis':'\u23DD','Union':'\u22C3','UnionPlus':'\u228E','uogon':'\u0173','Uogon':'\u0172','uopf':'\uD835\uDD66','Uopf':'\uD835\uDD4C','uparrow':'\u2191','Uparrow':'\u21D1','UpArrow':'\u2191','UpArrowBar':'\u2912','UpArrowDownArrow':'\u21C5','updownarrow':'\u2195','Updownarrow':'\u21D5','UpDownArrow':'\u2195','UpEquilibrium':'\u296E','upharpoonleft':'\u21BF','upharpoonright':'\u21BE','uplus':'\u228E','UpperLeftArrow':'\u2196','UpperRightArrow':'\u2197','upsi':'\u03C5','Upsi':'\u03D2','upsih':'\u03D2','upsilon':'\u03C5','Upsilon':'\u03A5','UpTee':'\u22A5','UpTeeArrow':'\u21A5','upuparrows':'\u21C8','urcorn':'\u231D','urcorner':'\u231D','urcrop':'\u230E','uring':'\u016F','Uring':'\u016E','urtri':'\u25F9','uscr':'\uD835\uDCCA','Uscr':'\uD835\uDCB0','utdot':'\u22F0','utilde':'\u0169','Utilde':'\u0168','utri':'\u25B5','utrif':'\u25B4','uuarr':'\u21C8','uuml':'\xFC','Uuml':'\xDC','uwangle':'\u29A7','vangrt':'\u299C','varepsilon':'\u03F5','varkappa':'\u03F0','varnothing':'\u2205','varphi':'\u03D5','varpi':'\u03D6','varpropto':'\u221D','varr':'\u2195','vArr':'\u21D5','varrho':'\u03F1','varsigma':'\u03C2','varsubsetneq':'\u228A\uFE00','varsubsetneqq':'\u2ACB\uFE00','varsupsetneq':'\u228B\uFE00','varsupsetneqq':'\u2ACC\uFE00','vartheta':'\u03D1','vartriangleleft':'\u22B2','vartriangleright':'\u22B3','vBar':'\u2AE8','Vbar':'\u2AEB','vBarv':'\u2AE9','vcy':'\u0432','Vcy':'\u0412','vdash':'\u22A2','vDash':'\u22A8','Vdash':'\u22A9','VDash':'\u22AB','Vdashl':'\u2AE6','vee':'\u2228','Vee':'\u22C1','veebar':'\u22BB','veeeq':'\u225A','vellip':'\u22EE','verbar':'|','Verbar':'\u2016','vert':'|','Vert':'\u2016','VerticalBar':'\u2223','VerticalLine':'|','VerticalSeparator':'\u2758','VerticalTilde':'\u2240','VeryThinSpace':'\u200A','vfr':'\uD835\uDD33','Vfr':'\uD835\uDD19','vltri':'\u22B2','vnsub':'\u2282\u20D2','vnsup':'\u2283\u20D2','vopf':'\uD835\uDD67','Vopf':'\uD835\uDD4D','vprop':'\u221D','vrtri':'\u22B3','vscr':'\uD835\uDCCB','Vscr':'\uD835\uDCB1','vsubne':'\u228A\uFE00','vsubnE':'\u2ACB\uFE00','vsupne':'\u228B\uFE00','vsupnE':'\u2ACC\uFE00','Vvdash':'\u22AA','vzigzag':'\u299A','wcirc':'\u0175','Wcirc':'\u0174','wedbar':'\u2A5F','wedge':'\u2227','Wedge':'\u22C0','wedgeq':'\u2259','weierp':'\u2118','wfr':'\uD835\uDD34','Wfr':'\uD835\uDD1A','wopf':'\uD835\uDD68','Wopf':'\uD835\uDD4E','wp':'\u2118','wr':'\u2240','wreath':'\u2240','wscr':'\uD835\uDCCC','Wscr':'\uD835\uDCB2','xcap':'\u22C2','xcirc':'\u25EF','xcup':'\u22C3','xdtri':'\u25BD','xfr':'\uD835\uDD35','Xfr':'\uD835\uDD1B','xharr':'\u27F7','xhArr':'\u27FA','xi':'\u03BE','Xi':'\u039E','xlarr':'\u27F5','xlArr':'\u27F8','xmap':'\u27FC','xnis':'\u22FB','xodot':'\u2A00','xopf':'\uD835\uDD69','Xopf':'\uD835\uDD4F','xoplus':'\u2A01','xotime':'\u2A02','xrarr':'\u27F6','xrArr':'\u27F9','xscr':'\uD835\uDCCD','Xscr':'\uD835\uDCB3','xsqcup':'\u2A06','xuplus':'\u2A04','xutri':'\u25B3','xvee':'\u22C1','xwedge':'\u22C0','yacute':'\xFD','Yacute':'\xDD','yacy':'\u044F','YAcy':'\u042F','ycirc':'\u0177','Ycirc':'\u0176','ycy':'\u044B','Ycy':'\u042B','yen':'\xA5','yfr':'\uD835\uDD36','Yfr':'\uD835\uDD1C','yicy':'\u0457','YIcy':'\u0407','yopf':'\uD835\uDD6A','Yopf':'\uD835\uDD50','yscr':'\uD835\uDCCE','Yscr':'\uD835\uDCB4','yucy':'\u044E','YUcy':'\u042E','yuml':'\xFF','Yuml':'\u0178','zacute':'\u017A','Zacute':'\u0179','zcaron':'\u017E','Zcaron':'\u017D','zcy':'\u0437','Zcy':'\u0417','zdot':'\u017C','Zdot':'\u017B','zeetrf':'\u2128','ZeroWidthSpace':'\u200B','zeta':'\u03B6','Zeta':'\u0396','zfr':'\uD835\uDD37','Zfr':'\u2128','zhcy':'\u0436','ZHcy':'\u0416','zigrarr':'\u21DD','zopf':'\uD835\uDD6B','Zopf':'\u2124','zscr':'\uD835\uDCCF','Zscr':'\uD835\uDCB5','zwj':'\u200D','zwnj':'\u200C'};
-	var decodeMapLegacy = {'aacute':'\xE1','Aacute':'\xC1','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','aelig':'\xE6','AElig':'\xC6','agrave':'\xE0','Agrave':'\xC0','amp':'&','AMP':'&','aring':'\xE5','Aring':'\xC5','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','brvbar':'\xA6','ccedil':'\xE7','Ccedil':'\xC7','cedil':'\xB8','cent':'\xA2','copy':'\xA9','COPY':'\xA9','curren':'\xA4','deg':'\xB0','divide':'\xF7','eacute':'\xE9','Eacute':'\xC9','ecirc':'\xEA','Ecirc':'\xCA','egrave':'\xE8','Egrave':'\xC8','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','frac12':'\xBD','frac14':'\xBC','frac34':'\xBE','gt':'>','GT':'>','iacute':'\xED','Iacute':'\xCD','icirc':'\xEE','Icirc':'\xCE','iexcl':'\xA1','igrave':'\xEC','Igrave':'\xCC','iquest':'\xBF','iuml':'\xEF','Iuml':'\xCF','laquo':'\xAB','lt':'<','LT':'<','macr':'\xAF','micro':'\xB5','middot':'\xB7','nbsp':'\xA0','not':'\xAC','ntilde':'\xF1','Ntilde':'\xD1','oacute':'\xF3','Oacute':'\xD3','ocirc':'\xF4','Ocirc':'\xD4','ograve':'\xF2','Ograve':'\xD2','ordf':'\xAA','ordm':'\xBA','oslash':'\xF8','Oslash':'\xD8','otilde':'\xF5','Otilde':'\xD5','ouml':'\xF6','Ouml':'\xD6','para':'\xB6','plusmn':'\xB1','pound':'\xA3','quot':'"','QUOT':'"','raquo':'\xBB','reg':'\xAE','REG':'\xAE','sect':'\xA7','shy':'\xAD','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','szlig':'\xDF','thorn':'\xFE','THORN':'\xDE','times':'\xD7','uacute':'\xFA','Uacute':'\xDA','ucirc':'\xFB','Ucirc':'\xDB','ugrave':'\xF9','Ugrave':'\xD9','uml':'\xA8','uuml':'\xFC','Uuml':'\xDC','yacute':'\xFD','Yacute':'\xDD','yen':'\xA5','yuml':'\xFF'};
-	var decodeMapNumeric = {'0':'\uFFFD','128':'\u20AC','130':'\u201A','131':'\u0192','132':'\u201E','133':'\u2026','134':'\u2020','135':'\u2021','136':'\u02C6','137':'\u2030','138':'\u0160','139':'\u2039','140':'\u0152','142':'\u017D','145':'\u2018','146':'\u2019','147':'\u201C','148':'\u201D','149':'\u2022','150':'\u2013','151':'\u2014','152':'\u02DC','153':'\u2122','154':'\u0161','155':'\u203A','156':'\u0153','158':'\u017E','159':'\u0178'};
-	var invalidReferenceCodePoints = [1,2,3,4,5,6,7,8,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,64976,64977,64978,64979,64980,64981,64982,64983,64984,64985,64986,64987,64988,64989,64990,64991,64992,64993,64994,64995,64996,64997,64998,64999,65000,65001,65002,65003,65004,65005,65006,65007,65534,65535,131070,131071,196606,196607,262142,262143,327678,327679,393214,393215,458750,458751,524286,524287,589822,589823,655358,655359,720894,720895,786430,786431,851966,851967,917502,917503,983038,983039,1048574,1048575,1114110,1114111];
-
-	/*--------------------------------------------------------------------------*/
-
-	var stringFromCharCode = String.fromCharCode;
-
-	var object = {};
-	var hasOwnProperty = object.hasOwnProperty;
-	var has = function(object, propertyName) {
-		return hasOwnProperty.call(object, propertyName);
-	};
-
-	var contains = function(array, value) {
-		var index = -1;
-		var length = array.length;
-		while (++index < length) {
-			if (array[index] == value) {
-				return true;
-			}
-		}
-		return false;
-	};
-
-	var merge = function(options, defaults) {
-		if (!options) {
-			return defaults;
-		}
-		var result = {};
-		var key;
-		for (key in defaults) {
-			// A `hasOwnProperty` check is not needed here, since only recognized
-			// option names are used anyway. Any others are ignored.
-			result[key] = has(options, key) ? options[key] : defaults[key];
-		}
-		return result;
-	};
-
-	// Modified version of `ucs2encode`; see https://mths.be/punycode.
-	var codePointToSymbol = function(codePoint, strict) {
-		var output = '';
-		if ((codePoint >= 0xD800 && codePoint <= 0xDFFF) || codePoint > 0x10FFFF) {
-			// See issue #4:
-			// “Otherwise, if the number is in the range 0xD800 to 0xDFFF or is
-			// greater than 0x10FFFF, then this is a parse error. Return a U+FFFD
-			// REPLACEMENT CHARACTER.”
-			if (strict) {
-				parseError('character reference outside the permissible Unicode range');
-			}
-			return '\uFFFD';
-		}
-		if (has(decodeMapNumeric, codePoint)) {
-			if (strict) {
-				parseError('disallowed character reference');
-			}
-			return decodeMapNumeric[codePoint];
-		}
-		if (strict && contains(invalidReferenceCodePoints, codePoint)) {
-			parseError('disallowed character reference');
-		}
-		if (codePoint > 0xFFFF) {
-			codePoint -= 0x10000;
-			output += stringFromCharCode(codePoint >>> 10 & 0x3FF | 0xD800);
-			codePoint = 0xDC00 | codePoint & 0x3FF;
-		}
-		output += stringFromCharCode(codePoint);
-		return output;
-	};
-
-	var hexEscape = function(codePoint) {
-		return '&#x' + codePoint.toString(16).toUpperCase() + ';';
-	};
-
-	var decEscape = function(codePoint) {
-		return '&#' + codePoint + ';';
-	};
-
-	var parseError = function(message) {
-		throw Error('Parse error: ' + message);
-	};
-
-	/*--------------------------------------------------------------------------*/
-
-	var encode = function(string, options) {
-		options = merge(options, encode.options);
-		var strict = options.strict;
-		if (strict && regexInvalidRawCodePoint.test(string)) {
-			parseError('forbidden code point');
-		}
-		var encodeEverything = options.encodeEverything;
-		var useNamedReferences = options.useNamedReferences;
-		var allowUnsafeSymbols = options.allowUnsafeSymbols;
-		var escapeCodePoint = options.decimal ? decEscape : hexEscape;
-
-		var escapeBmpSymbol = function(symbol) {
-			return escapeCodePoint(symbol.charCodeAt(0));
-		};
-
-		if (encodeEverything) {
-			// Encode ASCII symbols.
-			string = string.replace(regexAsciiWhitelist, function(symbol) {
-				// Use named references if requested & possible.
-				if (useNamedReferences && has(encodeMap, symbol)) {
-					return '&' + encodeMap[symbol] + ';';
-				}
-				return escapeBmpSymbol(symbol);
-			});
-			// Shorten a few escapes that represent two symbols, of which at least one
-			// is within the ASCII range.
-			if (useNamedReferences) {
-				string = string
-					.replace(/&gt;\u20D2/g, '&nvgt;')
-					.replace(/&lt;\u20D2/g, '&nvlt;')
-					.replace(/&#x66;&#x6A;/g, '&fjlig;');
-			}
-			// Encode non-ASCII symbols.
-			if (useNamedReferences) {
-				// Encode non-ASCII symbols that can be replaced with a named reference.
-				string = string.replace(regexEncodeNonAscii, function(string) {
-					// Note: there is no need to check `has(encodeMap, string)` here.
-					return '&' + encodeMap[string] + ';';
-				});
-			}
-			// Note: any remaining non-ASCII symbols are handled outside of the `if`.
-		} else if (useNamedReferences) {
-			// Apply named character references.
-			// Encode `<>"'&` using named character references.
-			if (!allowUnsafeSymbols) {
-				string = string.replace(regexEscape, function(string) {
-					return '&' + encodeMap[string] + ';'; // no need to check `has()` here
-				});
-			}
-			// Shorten escapes that represent two symbols, of which at least one is
-			// `<>"'&`.
-			string = string
-				.replace(/&gt;\u20D2/g, '&nvgt;')
-				.replace(/&lt;\u20D2/g, '&nvlt;');
-			// Encode non-ASCII symbols that can be replaced with a named reference.
-			string = string.replace(regexEncodeNonAscii, function(string) {
-				// Note: there is no need to check `has(encodeMap, string)` here.
-				return '&' + encodeMap[string] + ';';
-			});
-		} else if (!allowUnsafeSymbols) {
-			// Encode `<>"'&` using hexadecimal escapes, now that they’re not handled
-			// using named character references.
-			string = string.replace(regexEscape, escapeBmpSymbol);
-		}
-		return string
-			// Encode astral symbols.
-			.replace(regexAstralSymbols, function($0) {
-				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-				var high = $0.charCodeAt(0);
-				var low = $0.charCodeAt(1);
-				var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
-				return escapeCodePoint(codePoint);
-			})
-			// Encode any remaining BMP symbols that are not printable ASCII symbols
-			// using a hexadecimal escape.
-			.replace(regexBmpWhitelist, escapeBmpSymbol);
-	};
-	// Expose default options (so they can be overridden globally).
-	encode.options = {
-		'allowUnsafeSymbols': false,
-		'encodeEverything': false,
-		'strict': false,
-		'useNamedReferences': false,
-		'decimal' : false
-	};
-
-	var decode = function(html, options) {
-		options = merge(options, decode.options);
-		var strict = options.strict;
-		if (strict && regexInvalidEntity.test(html)) {
-			parseError('malformed character reference');
-		}
-		return html.replace(regexDecode, function($0, $1, $2, $3, $4, $5, $6, $7) {
-			var codePoint;
-			var semicolon;
-			var decDigits;
-			var hexDigits;
-			var reference;
-			var next;
-			if ($1) {
-				// Decode decimal escapes, e.g. `&#119558;`.
-				decDigits = $1;
-				semicolon = $2;
-				if (strict && !semicolon) {
-					parseError('character reference was not terminated by a semicolon');
-				}
-				codePoint = parseInt(decDigits, 10);
-				return codePointToSymbol(codePoint, strict);
-			}
-			if ($3) {
-				// Decode hexadecimal escapes, e.g. `&#x1D306;`.
-				hexDigits = $3;
-				semicolon = $4;
-				if (strict && !semicolon) {
-					parseError('character reference was not terminated by a semicolon');
-				}
-				codePoint = parseInt(hexDigits, 16);
-				return codePointToSymbol(codePoint, strict);
-			}
-			if ($5) {
-				// Decode named character references with trailing `;`, e.g. `&copy;`.
-				reference = $5;
-				if (has(decodeMap, reference)) {
-					return decodeMap[reference];
-				} else {
-					// Ambiguous ampersand. https://mths.be/notes/ambiguous-ampersands
-					if (strict) {
-						parseError(
-							'named character reference was not terminated by a semicolon'
-						);
-					}
-					return $0;
-				}
-			}
-			// If we’re still here, it’s a legacy reference for sure. No need for an
-			// extra `if` check.
-			// Decode named character references without trailing `;`, e.g. `&amp`
-			// This is only a parse error if it gets converted to `&`, or if it is
-			// followed by `=` in an attribute context.
-			reference = $6;
-			next = $7;
-			if (next && options.isAttributeValue) {
-				if (strict && next == '=') {
-					parseError('`&` did not start a character reference');
-				}
-				return $0;
-			} else {
-				if (strict) {
-					parseError(
-						'named character reference was not terminated by a semicolon'
-					);
-				}
-				// Note: there is no need to check `has(decodeMapLegacy, reference)`.
-				return decodeMapLegacy[reference] + (next || '');
-			}
-		});
-	};
-	// Expose default options (so they can be overridden globally).
-	decode.options = {
-		'isAttributeValue': false,
-		'strict': false
-	};
-
-	var escape = function(string) {
-		return string.replace(regexEscape, function($0) {
-			// Note: there is no need to check `has(escapeMap, $0)` here.
-			return escapeMap[$0];
-		});
-	};
-
-	/*--------------------------------------------------------------------------*/
-
-	var he = {
-		'version': '1.1.1',
-		'encode': encode,
-		'decode': decode,
-		'escape': escape,
-		'unescape': decode
-	};
-
-	// Some AMD build optimizers, like r.js, check for specific condition patterns
-	// like the following:
-	if (
-		typeof undefined == 'function' &&
-		typeof undefined.amd == 'object' &&
-		undefined.amd
-	) {
-		undefined(function() {
-			return he;
-		});
-	}	else if (freeExports && !freeExports.nodeType) {
-		if (freeModule) { // in Node.js, io.js, or RingoJS v0.8.0+
-			freeModule.exports = he;
-		} else { // in Narwhal or RingoJS v0.7.0-
-			for (var key in he) {
-				has(he, key) && (freeExports[key] = he[key]);
-			}
-		}
-	} else { // in Rhino or a web browser
-		root.he = he;
-	}
-
-}(commonjsGlobal));
-});
-
-/**
- * Not type-checking this file because it's mostly vendor code.
- */
-
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
-// Regular Expressions for parsing tags and attributes
-var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
-var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
-var startTagOpen = new RegExp(("^<" + qnameCapture));
-var startTagClose = /^\s*(\/?)>/;
-var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
-var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
-var conditionalComment = /^<!\[/;
-
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
-// Special Elements (can contain anything)
-var isPlainTextElement = makeMap('script,style,textarea', true);
-var reCache = {};
-
-var decodingMap = {
-  '&lt;': '<',
-  '&gt;': '>',
-  '&quot;': '"',
-  '&amp;': '&',
-  '&#10;': '\n',
-  '&#9;': '\t'
-};
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
-
-// #5992
-var isIgnoreNewlineTag = makeMap('pre,textarea', true);
-var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
-
-function decodeAttr (value, shouldDecodeNewlines) {
-  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-  return value.replace(re, function (match) { return decodingMap[match]; })
-}
-
-function parseHTML (html, options) {
-  var stack = [];
-  var expectHTML = options.expectHTML;
-  var isUnaryTag$$1 = options.isUnaryTag || no;
-  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-  var index = 0;
-  var last, lastTag;
-  while (html) {
-    last = html;
-    // Make sure we're not in a plaintext content element like script/style
-    if (!lastTag || !isPlainTextElement(lastTag)) {
-      var textEnd = html.indexOf('<');
-      if (textEnd === 0) {
-        // Comment:
-        if (comment.test(html)) {
-          var commentEnd = html.indexOf('-->');
-
-          if (commentEnd >= 0) {
-            if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
-            }
-            advance(commentEnd + 3);
-            continue
-          }
-        }
+  /**
+   * Helper that recursively merges two data objects together.
+   */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
 
-        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
-        if (conditionalComment.test(html)) {
-          var conditionalEnd = html.indexOf(']>');
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
 
-          if (conditionalEnd >= 0) {
-            advance(conditionalEnd + 2);
-            continue
-          }
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
+      }
+    }
+    return to
+  }
+
+  /**
+   * Data
+   */
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
+      }
+    } else {
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
+        } else {
+          return defaultData
+        }
+      }
+    }
+  }
+
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
+
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
+    }
+
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
+
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
+  ) {
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
+  }
+
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
+    }
+    return res
+  }
+
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
+
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
+  }
+
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
+      }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
+    }
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
+
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
+
+  /**
+   * Validate component names
+   */
+  function checkComponents (options) {
+    for (var key in options.components) {
+      validateComponentName(key);
+    }
+  }
+
+  function validateComponentName (name) {
+    if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
+      warn(
+        'Invalid component name: "' + name + '". Component names ' +
+        'should conform to valid custom element name in html5 specification.'
+      );
+    }
+    if (isBuiltInTag(name) || config.isReservedTag(name)) {
+      warn(
+        'Do not use built-in or reserved HTML elements as component ' +
+        'id: ' + name
+      );
+    }
+  }
+
+  /**
+   * Ensure all props option syntax are normalized into the
+   * Object-based format.
+   */
+  function normalizeProps (options, vm) {
+    var props = options.props;
+    if (!props) { return }
+    var res = {};
+    var i, val, name;
+    if (Array.isArray(props)) {
+      i = props.length;
+      while (i--) {
+        val = props[i];
+        if (typeof val === 'string') {
+          name = camelize(val);
+          res[name] = { type: null };
+        } else {
+          warn('props must be strings when using array syntax.');
+        }
+      }
+    } else if (isPlainObject(props)) {
+      for (var key in props) {
+        val = props[key];
+        name = camelize(key);
+        res[name] = isPlainObject(val)
+          ? val
+          : { type: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"props\": expected an Array or an Object, " +
+        "but got " + (toRawType(props)) + ".",
+        vm
+      );
+    }
+    options.props = res;
+  }
+
+  /**
+   * Normalize all injections into Object-based format
+   */
+  function normalizeInject (options, vm) {
+    var inject = options.inject;
+    if (!inject) { return }
+    var normalized = options.inject = {};
+    if (Array.isArray(inject)) {
+      for (var i = 0; i < inject.length; i++) {
+        normalized[inject[i]] = { from: inject[i] };
+      }
+    } else if (isPlainObject(inject)) {
+      for (var key in inject) {
+        var val = inject[key];
+        normalized[key] = isPlainObject(val)
+          ? extend({ from: key }, val)
+          : { from: val };
+      }
+    } else {
+      warn(
+        "Invalid value for option \"inject\": expected an Array or an Object, " +
+        "but got " + (toRawType(inject)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Normalize raw function directives into object format.
+   */
+  function normalizeDirectives (options) {
+    var dirs = options.directives;
+    if (dirs) {
+      for (var key in dirs) {
+        var def$$1 = dirs[key];
+        if (typeof def$$1 === 'function') {
+          dirs[key] = { bind: def$$1, update: def$$1 };
+        }
+      }
+    }
+  }
+
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
+      warn(
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
+      );
+    }
+  }
+
+  /**
+   * Merge two option objects into a new one.
+   * Core utility used in both instantiation and inheritance.
+   */
+  function mergeOptions (
+    parent,
+    child,
+    vm
+  ) {
+    {
+      checkComponents(child);
+    }
+
+    if (typeof child === 'function') {
+      child = child.options;
+    }
+
+    normalizeProps(child, vm);
+    normalizeInject(child, vm);
+    normalizeDirectives(child);
+
+    // Apply extends and mixins on the child options,
+    // but only if it is a raw options object that isn't
+    // the result of another mergeOptions call.
+    // Only merged options has the _base property.
+    if (!child._base) {
+      if (child.extends) {
+        parent = mergeOptions(parent, child.extends, vm);
+      }
+      if (child.mixins) {
+        for (var i = 0, l = child.mixins.length; i < l; i++) {
+          parent = mergeOptions(parent, child.mixins[i], vm);
+        }
+      }
+    }
+
+    var options = {};
+    var key;
+    for (key in parent) {
+      mergeField(key);
+    }
+    for (key in child) {
+      if (!hasOwn(parent, key)) {
+        mergeField(key);
+      }
+    }
+    function mergeField (key) {
+      var strat = strats[key] || defaultStrat;
+      options[key] = strat(parent[key], child[key], vm, key);
+    }
+    return options
+  }
+
+  /**
+   * Resolve an asset.
+   * This function is used because child instances need access
+   * to assets defined in its ancestor chain.
+   */
+  function resolveAsset (
+    options,
+    type,
+    id,
+    warnMissing
+  ) {
+    /* istanbul ignore if */
+    if (typeof id !== 'string') {
+      return
+    }
+    var assets = options[type];
+    // check local registration variations first
+    if (hasOwn(assets, id)) { return assets[id] }
+    var camelizedId = camelize(id);
+    if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+    var PascalCaseId = capitalize(camelizedId);
+    if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+    // fallback to prototype chain
+    var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
+    if (warnMissing && !res) {
+      warn(
+        'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
+        options
+      );
+    }
+    return res
+  }
+
+  /*  */
+
+
+
+  function validateProp (
+    key,
+    propOptions,
+    propsData,
+    vm
+  ) {
+    var prop = propOptions[key];
+    var absent = !hasOwn(propsData, key);
+    var value = propsData[key];
+    // boolean casting
+    var booleanIndex = getTypeIndex(Boolean, prop.type);
+    if (booleanIndex > -1) {
+      if (absent && !hasOwn(prop, 'default')) {
+        value = false;
+      } else if (value === '' || value === hyphenate(key)) {
+        // only cast empty string / same name to boolean if
+        // boolean has higher priority
+        var stringIndex = getTypeIndex(String, prop.type);
+        if (stringIndex < 0 || booleanIndex < stringIndex) {
+          value = true;
+        }
+      }
+    }
+    // check default value
+    if (value === undefined) {
+      value = getPropDefaultValue(vm, prop, key);
+      // since the default value is a fresh copy,
+      // make sure to observe it.
+      var prevShouldObserve = shouldObserve;
+      toggleObserving(true);
+      observe(value);
+      toggleObserving(prevShouldObserve);
+    }
+    {
+      assertProp(prop, key, value, vm, absent);
+    }
+    return value
+  }
+
+  /**
+   * Get the default value of a prop.
+   */
+  function getPropDefaultValue (vm, prop, key) {
+    // no default, return undefined
+    if (!hasOwn(prop, 'default')) {
+      return undefined
+    }
+    var def = prop.default;
+    // warn against non-factory defaults for Object & Array
+    if (isObject(def)) {
+      warn(
+        'Invalid default value for prop "' + key + '": ' +
+        'Props with type Object/Array must use a factory function ' +
+        'to return the default value.',
+        vm
+      );
+    }
+    // the raw prop value was also undefined from previous render,
+    // return previous default value to avoid unnecessary watcher trigger
+    if (vm && vm.$options.propsData &&
+      vm.$options.propsData[key] === undefined &&
+      vm._props[key] !== undefined
+    ) {
+      return vm._props[key]
+    }
+    // call factory function for non-Function types
+    // a value is Function if its prototype is function even across different execution context
+    return typeof def === 'function' && getType(prop.type) !== 'Function'
+      ? def.call(vm)
+      : def
+  }
+
+  /**
+   * Assert whether a prop is valid.
+   */
+  function assertProp (
+    prop,
+    name,
+    value,
+    vm,
+    absent
+  ) {
+    if (prop.required && absent) {
+      warn(
+        'Missing required prop: "' + name + '"',
+        vm
+      );
+      return
+    }
+    if (value == null && !prop.required) {
+      return
+    }
+    var type = prop.type;
+    var valid = !type || type === true;
+    var expectedTypes = [];
+    if (type) {
+      if (!Array.isArray(type)) {
+        type = [type];
+      }
+      for (var i = 0; i < type.length && !valid; i++) {
+        var assertedType = assertType(value, type[i], vm);
+        expectedTypes.push(assertedType.expectedType || '');
+        valid = assertedType.valid;
+      }
+    }
+
+    var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+    if (!valid && haveExpectedTypes) {
+      warn(
+        getInvalidTypeMessage(name, value, expectedTypes),
+        vm
+      );
+      return
+    }
+    var validator = prop.validator;
+    if (validator) {
+      if (!validator(value)) {
+        warn(
+          'Invalid prop: custom validator check failed for prop "' + name + '".',
+          vm
+        );
+      }
+    }
+  }
+
+  var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
+
+  function assertType (value, type, vm) {
+    var valid;
+    var expectedType = getType(type);
+    if (simpleCheckRE.test(expectedType)) {
+      var t = typeof value;
+      valid = t === expectedType.toLowerCase();
+      // for primitive wrapper objects
+      if (!valid && t === 'object') {
+        valid = value instanceof type;
+      }
+    } else if (expectedType === 'Object') {
+      valid = isPlainObject(value);
+    } else if (expectedType === 'Array') {
+      valid = Array.isArray(value);
+    } else {
+      try {
+        valid = value instanceof type;
+      } catch (e) {
+        warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+        valid = false;
+      }
+    }
+    return {
+      valid: valid,
+      expectedType: expectedType
+    }
+  }
+
+  var functionTypeCheckRE = /^\s*function (\w+)/;
+
+  /**
+   * Use function string name to check built-in types,
+   * because a simple equality check will fail when running
+   * across different vms / iframes.
+   */
+  function getType (fn) {
+    var match = fn && fn.toString().match(functionTypeCheckRE);
+    return match ? match[1] : ''
+  }
+
+  function isSameType (a, b) {
+    return getType(a) === getType(b)
+  }
+
+  function getTypeIndex (type, expectedTypes) {
+    if (!Array.isArray(expectedTypes)) {
+      return isSameType(expectedTypes, type) ? 0 : -1
+    }
+    for (var i = 0, len = expectedTypes.length; i < len; i++) {
+      if (isSameType(expectedTypes[i], type)) {
+        return i
+      }
+    }
+    return -1
+  }
+
+  function getInvalidTypeMessage (name, value, expectedTypes) {
+    var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+      " Expected " + (expectedTypes.map(capitalize).join(', '));
+    var expectedType = expectedTypes[0];
+    var receivedType = toRawType(value);
+    // check if we need to specify expected value
+    if (
+      expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      isExplicable(typeof value) &&
+      !isBoolean(expectedType, receivedType)
+    ) {
+      message += " with value " + (styleValue(value, expectedType));
+    }
+    message += ", got " + receivedType + " ";
+    // check if we need to specify received value
+    if (isExplicable(receivedType)) {
+      message += "with value " + (styleValue(value, receivedType)) + ".";
+    }
+    return message
+  }
+
+  function styleValue (value, type) {
+    if (type === 'String') {
+      return ("\"" + value + "\"")
+    } else if (type === 'Number') {
+      return ("" + (Number(value)))
+    } else {
+      return ("" + value)
+    }
+  }
+
+  var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+  function isExplicable (value) {
+    return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+  }
+
+  function isBoolean () {
+    var args = [], len = arguments.length;
+    while ( len-- ) args[ len ] = arguments[ len ];
+
+    return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
+  }
+
+  /*  */
+
+  function handleError (err, vm, info) {
+    // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+    // See: https://github.com/vuejs/vuex/issues/1505
+    pushTarget();
+    try {
+      if (vm) {
+        var cur = vm;
+        while ((cur = cur.$parent)) {
+          var hooks = cur.$options.errorCaptured;
+          if (hooks) {
+            for (var i = 0; i < hooks.length; i++) {
+              try {
+                var capture = hooks[i].call(cur, err, vm, info) === false;
+                if (capture) { return }
+              } catch (e) {
+                globalHandleError(e, cur, 'errorCaptured hook');
+              }
+            }
+          }
+        }
+      }
+      globalHandleError(err, vm, info);
+    } finally {
+      popTarget();
+    }
+  }
+
+  function invokeWithErrorHandling (
+    handler,
+    context,
+    args,
+    vm,
+    info
+  ) {
+    var res;
+    try {
+      res = args ? handler.apply(context, args) : handler.call(context);
+      if (res && !res._isVue && isPromise(res) && !res._handled) {
+        res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+        // issue #9511
+        // avoid catch triggering multiple times when nested calls
+        res._handled = true;
+      }
+    } catch (e) {
+      handleError(e, vm, info);
+    }
+    return res
+  }
+
+  function globalHandleError (err, vm, info) {
+    logError(err, vm, info);
+  }
+
+  function logError (err, vm, info) {
+    {
+      warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
+    }
+    /* istanbul ignore else */
+    if ((inBrowser || inWeex) && typeof console !== 'undefined') {
+      console.error(err);
+    } else {
+      throw err
+    }
+  }
+
+  /*  */
+
+  var callbacks = [];
+
+  function flushCallbacks () {
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
+    }
+  }
+
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) ; else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
+
+  /*  */
+
+  /*  */
+
+  function genClassForVnode (vnode) {
+    var data = vnode.data;
+    var parentNode = vnode;
+    var childNode = vnode;
+    while (isDef(childNode.componentInstance)) {
+      childNode = childNode.componentInstance._vnode;
+      if (childNode && childNode.data) {
+        data = mergeClassData(childNode.data, data);
+      }
+    }
+    while (isDef(parentNode = parentNode.parent)) {
+      if (parentNode && parentNode.data) {
+        data = mergeClassData(data, parentNode.data);
+      }
+    }
+    return renderClass(data.staticClass, data.class)
+  }
+
+  function mergeClassData (child, parent) {
+    return {
+      staticClass: concat(child.staticClass, parent.staticClass),
+      class: isDef(child.class)
+        ? [child.class, parent.class]
+        : parent.class
+    }
+  }
+
+  function renderClass (
+    staticClass,
+    dynamicClass
+  ) {
+    if (isDef(staticClass) || isDef(dynamicClass)) {
+      return concat(staticClass, stringifyClass(dynamicClass))
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function concat (a, b) {
+    return a ? b ? (a + ' ' + b) : a : (b || '')
+  }
+
+  function stringifyClass (value) {
+    if (Array.isArray(value)) {
+      return stringifyArray(value)
+    }
+    if (isObject(value)) {
+      return stringifyObject(value)
+    }
+    if (typeof value === 'string') {
+      return value
+    }
+    /* istanbul ignore next */
+    return ''
+  }
+
+  function stringifyArray (value) {
+    var res = '';
+    var stringified;
+    for (var i = 0, l = value.length; i < l; i++) {
+      if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
+        if (res) { res += ' '; }
+        res += stringified;
+      }
+    }
+    return res
+  }
+
+  function stringifyObject (value) {
+    var res = '';
+    for (var key in value) {
+      if (value[key]) {
+        if (res) { res += ' '; }
+        res += key;
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
+
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
+
+  var isPreTag = function (tag) { return tag === 'pre'; };
+
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
+  };
+
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
+    }
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
+    }
+  }
+
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+  /*  */
+
+  /*  */
+
+  function renderClass$1 (node) {
+    var classList = genClassForVnode(node);
+    if (classList !== '') {
+      return (" class=\"" + (escape(classList)) + "\"")
+    }
+  }
+
+  /*  */
+
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+      }
+    });
+    return res
+  });
+
+  // merge static and dynamic style data on the same vnode
+  function normalizeStyleData (data) {
+    var style = normalizeStyleBinding(data.style);
+    // static style is pre-processed into an object during compilation
+    // and is always a fresh object, so it's safe to merge into it
+    return data.staticStyle
+      ? extend(data.staticStyle, style)
+      : style
+  }
+
+  // normalize possible array / string values into Object
+  function normalizeStyleBinding (bindingStyle) {
+    if (Array.isArray(bindingStyle)) {
+      return toObject(bindingStyle)
+    }
+    if (typeof bindingStyle === 'string') {
+      return parseStyleText(bindingStyle)
+    }
+    return bindingStyle
+  }
+
+  /**
+   * parent component style should be after child's
+   * so that parent component's style could override it
+   */
+  function getStyle (vnode, checkChild) {
+    var res = {};
+    var styleData;
+
+    if (checkChild) {
+      var childNode = vnode;
+      while (childNode.componentInstance) {
+        childNode = childNode.componentInstance._vnode;
+        if (
+          childNode && childNode.data &&
+          (styleData = normalizeStyleData(childNode.data))
+        ) {
+          extend(res, styleData);
+        }
+      }
+    }
+
+    if ((styleData = normalizeStyleData(vnode.data))) {
+      extend(res, styleData);
+    }
+
+    var parentNode = vnode;
+    while ((parentNode = parentNode.parent)) {
+      if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
+        extend(res, styleData);
+      }
+    }
+    return res
+  }
+
+  /*  */
+
+  function genStyle (style) {
+    var styleText = '';
+    for (var key in style) {
+      var value = style[key];
+      var hyphenatedKey = hyphenate(key);
+      if (Array.isArray(value)) {
+        for (var i = 0, len = value.length; i < len; i++) {
+          styleText += normalizeValue(hyphenatedKey, value[i]);
+        }
+      } else {
+        styleText += normalizeValue(hyphenatedKey, value);
+      }
+    }
+    return styleText
+  }
+
+  function normalizeValue(key, value) {
+    if (
+      typeof value === 'string' ||
+      (typeof value === 'number' && noUnitNumericStyleProps[key]) ||
+      value === 0
+    ) {
+      return (key + ":" + value + ";")
+    } else {
+      // invalid values
+      return ""
+    }
+  }
+
+  function renderStyle (vnode) {
+    var styleText = genStyle(getStyle(vnode, false));
+    if (styleText !== '') {
+      return (" style=" + (JSON.stringify(escape(styleText))))
+    }
+  }
+
+  var modules = [
+    renderAttrs,
+    renderDOMProps,
+    renderClass$1,
+    renderStyle
+  ];
+
+  /*  */
+
+  function show (node, dir) {
+    if (!dir.value) {
+      var style = node.data.style || (node.data.style = {});
+      if (Array.isArray(style)) {
+        style.push({ display: 'none' });
+      } else {
+        style.display = 'none';
+      }
+    }
+  }
+
+  /*  */
+
+  // this is only applied for <select v-model> because it is the only edge case
+  // that must be done at runtime instead of compile time.
+  function model (node, dir) {
+    if (!node.children) { return }
+    var value = dir.value;
+    var isMultiple = node.data.attrs && node.data.attrs.multiple;
+    for (var i = 0, l = node.children.length; i < l; i++) {
+      var option = node.children[i];
+      if (option.tag === 'option') {
+        if (isMultiple) {
+          var selected =
+            Array.isArray(value) &&
+            (looseIndexOf(value, getValue(option)) > -1);
+          if (selected) {
+            setSelected(option);
+          }
+        } else {
+          if (looseEqual(value, getValue(option))) {
+            setSelected(option);
+            return
+          }
+        }
+      }
+    }
+  }
+
+  function getValue (option) {
+    var data = option.data || {};
+    return (
+      (data.attrs && data.attrs.value) ||
+      (data.domProps && data.domProps.value) ||
+      (option.children && option.children[0] && option.children[0].text)
+    )
+  }
+
+  function setSelected (option) {
+    var data = option.data || (option.data = {});
+    var attrs = data.attrs || (data.attrs = {});
+    attrs.selected = '';
+  }
+
+  var directives = {
+    show: show,
+    model: model
+  };
+
+  /*  */
+
+  var isUnaryTag = makeMap(
+    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+    'link,meta,param,source,track,wbr'
+  );
+
+  // Elements that you can, intentionally, leave open
+  // (and which close themselves)
+  var canBeLeftOpenTag = makeMap(
+    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+  );
+
+  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+  var isNonPhrasingTag = makeMap(
+    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+    'title,tr,track'
+  );
+
+  /*  */
+
+  var MAX_STACK_DEPTH = 800;
+  var noop$1 = function (_) { return _; };
+
+  var defer = typeof process !== 'undefined' && process.nextTick
+    ? process.nextTick
+    : typeof Promise !== 'undefined'
+      ? function (fn) { return Promise.resolve().then(fn); }
+      : typeof setTimeout !== 'undefined'
+        ? setTimeout
+        : noop$1;
+
+  if (defer === noop$1) {
+    throw new Error(
+      'Your JavaScript runtime does not support any asynchronous primitives ' +
+      'that are required by vue-server-renderer. Please use a polyfill for ' +
+      'either Promise or setTimeout.'
+    )
+  }
+
+  function createWriteFunction (
+    write,
+    onError
+  ) {
+    var stackDepth = 0;
+    var cachedWrite = function (text, next) {
+      if (text && cachedWrite.caching) {
+        cachedWrite.cacheBuffer[cachedWrite.cacheBuffer.length - 1] += text;
+      }
+      var waitForNext = write(text, next);
+      if (waitForNext !== true) {
+        if (stackDepth >= MAX_STACK_DEPTH) {
+          defer(function () {
+            try { next(); } catch (e) {
+              onError(e);
+            }
+          });
+        } else {
+          stackDepth++;
+          next();
+          stackDepth--;
+        }
+      }
+    };
+    cachedWrite.caching = false;
+    cachedWrite.cacheBuffer = [];
+    cachedWrite.componentBuffer = [];
+    return cachedWrite
+  }
+
+  /*  */
+
+
+
+  var RenderContext = function RenderContext (options) {
+    this.userContext = options.userContext;
+    this.activeInstance = options.activeInstance;
+    this.renderStates = [];
+
+    this.write = options.write;
+    this.done = options.done;
+    this.renderNode = options.renderNode;
+
+    this.isUnaryTag = options.isUnaryTag;
+    this.modules = options.modules;
+    this.directives = options.directives;
+
+    var cache = options.cache;
+    if (cache && (!cache.get || !cache.set)) {
+      throw new Error('renderer cache must implement at least get & set.')
+    }
+    this.cache = cache;
+    this.get = cache && normalizeAsync(cache, 'get');
+    this.has = cache && normalizeAsync(cache, 'has');
+
+    this.next = this.next.bind(this);
+  };
+
+  RenderContext.prototype.next = function next () {
+    // eslint-disable-next-line
+    while (true) {
+      var lastState = this.renderStates[this.renderStates.length - 1];
+      if (isUndef(lastState)) {
+        return this.done()
+      }
+      /* eslint-disable no-case-declarations */
+      switch (lastState.type) {
+        case 'Element':
+        case 'Fragment':
+          var children = lastState.children;
+        var total = lastState.total;
+          var rendered = lastState.rendered++;
+          if (rendered < total) {
+            return this.renderNode(children[rendered], false, this)
+          } else {
+            this.renderStates.pop();
+            if (lastState.type === 'Element') {
+              return this.write(lastState.endTag, this.next)
+            }
+          }
+          break
+        case 'Component':
+          this.renderStates.pop();
+          this.activeInstance = lastState.prevActive;
+          break
+        case 'ComponentWithCache':
+          this.renderStates.pop();
+          var buffer = lastState.buffer;
+        var bufferIndex = lastState.bufferIndex;
+        var componentBuffer = lastState.componentBuffer;
+        var key = lastState.key;
+          var result = {
+            html: buffer[bufferIndex],
+            components: componentBuffer[bufferIndex]
+          };
+          this.cache.set(key, result);
+          if (bufferIndex === 0) {
+            // this is a top-level cached component,
+            // exit caching mode.
+            this.write.caching = false;
+          } else {
+            // parent component is also being cached,
+            // merge self into parent's result
+            buffer[bufferIndex - 1] += result.html;
+            var prev = componentBuffer[bufferIndex - 1];
+            result.components.forEach(function (c) { return prev.add(c); });
+          }
+          buffer.length = bufferIndex;
+          componentBuffer.length = bufferIndex;
+          break
+      }
+    }
+  };
+
+  function normalizeAsync (cache, method) {
+    var fn = cache[method];
+    if (isUndef(fn)) {
+      return
+    } else if (fn.length > 1) {
+      return function (key, cb) { return fn.call(cache, key, cb); }
+    } else {
+      return function (key, cb) { return cb(fn.call(cache, key)); }
+    }
+  }
+
+  /*  */
+
+  var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+  function parseFilters (exp) {
+    var inSingle = false;
+    var inDouble = false;
+    var inTemplateString = false;
+    var inRegex = false;
+    var curly = 0;
+    var square = 0;
+    var paren = 0;
+    var lastFilterIndex = 0;
+    var c, prev, i, expression, filters;
+
+    for (i = 0; i < exp.length; i++) {
+      prev = c;
+      c = exp.charCodeAt(i);
+      if (inSingle) {
+        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+      } else if (inDouble) {
+        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+      } else if (inTemplateString) {
+        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+      } else if (inRegex) {
+        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+      } else if (
+        c === 0x7C && // pipe
+        exp.charCodeAt(i + 1) !== 0x7C &&
+        exp.charCodeAt(i - 1) !== 0x7C &&
+        !curly && !square && !paren
+      ) {
+        if (expression === undefined) {
+          // first filter, end of expression
+          lastFilterIndex = i + 1;
+          expression = exp.slice(0, i).trim();
+        } else {
+          pushFilter();
+        }
+      } else {
+        switch (c) {
+          case 0x22: inDouble = true; break         // "
+          case 0x27: inSingle = true; break         // '
+          case 0x60: inTemplateString = true; break // `
+          case 0x28: paren++; break                 // (
+          case 0x29: paren--; break                 // )
+          case 0x5B: square++; break                // [
+          case 0x5D: square--; break                // ]
+          case 0x7B: curly++; break                 // {
+          case 0x7D: curly--; break                 // }
+        }
+        if (c === 0x2f) { // /
+          var j = i - 1;
+          var p = (void 0);
+          // find first non-whitespace prev char
+          for (; j >= 0; j--) {
+            p = exp.charAt(j);
+            if (p !== ' ') { break }
+          }
+          if (!p || !validDivisionCharRE.test(p)) {
+            inRegex = true;
+          }
+        }
+      }
+    }
+
+    if (expression === undefined) {
+      expression = exp.slice(0, i).trim();
+    } else if (lastFilterIndex !== 0) {
+      pushFilter();
+    }
+
+    function pushFilter () {
+      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+      lastFilterIndex = i + 1;
+    }
+
+    if (filters) {
+      for (i = 0; i < filters.length; i++) {
+        expression = wrapFilter(expression, filters[i]);
+      }
+    }
+
+    return expression
+  }
+
+  function wrapFilter (exp, filter) {
+    var i = filter.indexOf('(');
+    if (i < 0) {
+      // _f: resolveFilter
+      return ("_f(\"" + filter + "\")(" + exp + ")")
+    } else {
+      var name = filter.slice(0, i);
+      var args = filter.slice(i + 1);
+      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+    }
+  }
+
+  /*  */
+
+  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
+
+  var buildRegex = cached(function (delimiters) {
+    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+  });
+
+
+
+  function parseText (
+    text,
+    delimiters
+  ) {
+    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+    if (!tagRE.test(text)) {
+      return
+    }
+    var tokens = [];
+    var rawTokens = [];
+    var lastIndex = tagRE.lastIndex = 0;
+    var match, index, tokenValue;
+    while ((match = tagRE.exec(text))) {
+      index = match.index;
+      // push text token
+      if (index > lastIndex) {
+        rawTokens.push(tokenValue = text.slice(lastIndex, index));
+        tokens.push(JSON.stringify(tokenValue));
+      }
+      // tag token
+      var exp = parseFilters(match[1].trim());
+      tokens.push(("_s(" + exp + ")"));
+      rawTokens.push({ '@binding': exp });
+      lastIndex = index + match[0].length;
+    }
+    if (lastIndex < text.length) {
+      rawTokens.push(tokenValue = text.slice(lastIndex));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    return {
+      expression: tokens.join('+'),
+      tokens: rawTokens
+    }
+  }
+
+  /*  */
+
+
+
+  /* eslint-disable no-unused-vars */
+  function baseWarn (msg, range) {
+    console.error(("[Vue compiler]: " + msg));
+  }
+  /* eslint-enable no-unused-vars */
+
+  function pluckModuleFunction (
+    modules,
+    key
+  ) {
+    return modules
+      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+      : []
+  }
+
+  function addProp (el, name, value, range, dynamic) {
+    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
+  }
+
+  function addAttr (el, name, value, range, dynamic) {
+    var attrs = dynamic
+      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+      : (el.attrs || (el.attrs = []));
+    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
+  }
+
+  // add a raw attr (use this in preTransforms)
+  function addRawAttr (el, name, value, range) {
+    el.attrsMap[name] = value;
+    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+  }
+
+  function addDirective (
+    el,
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers,
+    range
+  ) {
+    (el.directives || (el.directives = [])).push(rangeSetItem({
+      name: name,
+      rawName: rawName,
+      value: value,
+      arg: arg,
+      isDynamicArg: isDynamicArg,
+      modifiers: modifiers
+    }, range));
+    el.plain = false;
+  }
+
+  function prependModifierMarker (symbol, name, dynamic) {
+    return dynamic
+      ? ("_p(" + name + ",\"" + symbol + "\")")
+      : symbol + name // mark the event as captured
+  }
+
+  function addHandler (
+    el,
+    name,
+    value,
+    modifiers,
+    important,
+    warn,
+    range,
+    dynamic
+  ) {
+    modifiers = modifiers || emptyObject;
+    // warn prevent and passive modifier
+    /* istanbul ignore if */
+    if (
+      warn &&
+      modifiers.prevent && modifiers.passive
+    ) {
+      warn(
+        'passive and prevent can\'t be used together. ' +
+        'Passive handler can\'t prevent default event.',
+        range
+      );
+    }
+
+    // normalize click.right and click.middle since they don't actually fire
+    // this is technically browser-specific, but at least for now browsers are
+    // the only target envs that have right/middle clicks.
+    if (modifiers.right) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'contextmenu';
+        delete modifiers.right;
+      }
+    } else if (modifiers.middle) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'mouseup';
+      }
+    }
+
+    // check capture modifier
+    if (modifiers.capture) {
+      delete modifiers.capture;
+      name = prependModifierMarker('!', name, dynamic);
+    }
+    if (modifiers.once) {
+      delete modifiers.once;
+      name = prependModifierMarker('~', name, dynamic);
+    }
+    /* istanbul ignore if */
+    if (modifiers.passive) {
+      delete modifiers.passive;
+      name = prependModifierMarker('&', name, dynamic);
+    }
+
+    var events;
+    if (modifiers.native) {
+      delete modifiers.native;
+      events = el.nativeEvents || (el.nativeEvents = {});
+    } else {
+      events = el.events || (el.events = {});
+    }
+
+    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+    if (modifiers !== emptyObject) {
+      newHandler.modifiers = modifiers;
+    }
+
+    var handlers = events[name];
+    /* istanbul ignore if */
+    if (Array.isArray(handlers)) {
+      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+    } else if (handlers) {
+      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+    } else {
+      events[name] = newHandler;
+    }
+
+    el.plain = false;
+  }
+
+  function getRawBindingAttr (
+    el,
+    name
+  ) {
+    return el.rawAttrsMap[':' + name] ||
+      el.rawAttrsMap['v-bind:' + name] ||
+      el.rawAttrsMap[name]
+  }
+
+  function getBindingAttr (
+    el,
+    name,
+    getStatic
+  ) {
+    var dynamicValue =
+      getAndRemoveAttr(el, ':' + name) ||
+      getAndRemoveAttr(el, 'v-bind:' + name);
+    if (dynamicValue != null) {
+      return parseFilters(dynamicValue)
+    } else if (getStatic !== false) {
+      var staticValue = getAndRemoveAttr(el, name);
+      if (staticValue != null) {
+        return JSON.stringify(staticValue)
+      }
+    }
+  }
+
+  // note: this only removes the attr from the Array (attrsList) so that it
+  // doesn't get processed by processAttrs.
+  // By default it does NOT remove it from the map (attrsMap) because the map is
+  // needed during codegen.
+  function getAndRemoveAttr (
+    el,
+    name,
+    removeFromMap
+  ) {
+    var val;
+    if ((val = el.attrsMap[name]) != null) {
+      var list = el.attrsList;
+      for (var i = 0, l = list.length; i < l; i++) {
+        if (list[i].name === name) {
+          list.splice(i, 1);
+          break
+        }
+      }
+    }
+    if (removeFromMap) {
+      delete el.attrsMap[name];
+    }
+    return val
+  }
+
+  function getAndRemoveAttrByRegex (
+    el,
+    name
+  ) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      var attr = list[i];
+      if (name.test(attr.name)) {
+        list.splice(i, 1);
+        return attr
+      }
+    }
+  }
+
+  function rangeSetItem (
+    item,
+    range
+  ) {
+    if (range) {
+      if (range.start != null) {
+        item.start = range.start;
+      }
+      if (range.end != null) {
+        item.end = range.end;
+      }
+    }
+    return item
+  }
+
+  /*  */
+
+  function transformNode (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticClass = getAndRemoveAttr(el, 'class');
+    if (staticClass) {
+      var res = parseText(staticClass, options.delimiters);
+      if (res) {
+        warn(
+          "class=\"" + staticClass + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div class="{{ val }}">, use <div :class="val">.',
+          el.rawAttrsMap['class']
+        );
+      }
+    }
+    if (staticClass) {
+      el.staticClass = JSON.stringify(staticClass);
+    }
+    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+    if (classBinding) {
+      el.classBinding = classBinding;
+    }
+  }
+
+  function genData (el) {
+    var data = '';
+    if (el.staticClass) {
+      data += "staticClass:" + (el.staticClass) + ",";
+    }
+    if (el.classBinding) {
+      data += "class:" + (el.classBinding) + ",";
+    }
+    return data
+  }
+
+  var klass = {
+    staticKeys: ['staticClass'],
+    transformNode: transformNode,
+    genData: genData
+  };
+
+  /*  */
+
+  function transformNode$1 (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticStyle = getAndRemoveAttr(el, 'style');
+    if (staticStyle) {
+      /* istanbul ignore if */
+      {
+        var res = parseText(staticStyle, options.delimiters);
+        if (res) {
+          warn(
+            "style=\"" + staticStyle + "\": " +
+            'Interpolation inside attributes has been removed. ' +
+            'Use v-bind or the colon shorthand instead. For example, ' +
+            'instead of <div style="{{ val }}">, use <div :style="val">.',
+            el.rawAttrsMap['style']
+          );
+        }
+      }
+      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+    }
+
+    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+    if (styleBinding) {
+      el.styleBinding = styleBinding;
+    }
+  }
+
+  function genData$1 (el) {
+    var data = '';
+    if (el.staticStyle) {
+      data += "staticStyle:" + (el.staticStyle) + ",";
+    }
+    if (el.styleBinding) {
+      data += "style:(" + (el.styleBinding) + "),";
+    }
+    return data
+  }
+
+  var style = {
+    staticKeys: ['staticStyle'],
+    transformNode: transformNode$1,
+    genData: genData$1
+  };
+
+  var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+  function createCommonjsModule(fn, module) {
+  	return module = { exports: {} }, fn(module, module.exports), module.exports;
+  }
+
+  var he = createCommonjsModule(function (module, exports) {
+  (function(root) {
+
+  	// Detect free variables `exports`.
+  	var freeExports = exports;
+
+  	// Detect free variable `module`.
+  	var freeModule = module &&
+  		module.exports == freeExports && module;
+
+  	// Detect free variable `global`, from Node.js or Browserified code,
+  	// and use it as `root`.
+  	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
+  	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
+  		root = freeGlobal;
+  	}
+
+  	/*--------------------------------------------------------------------------*/
+
+  	// All astral symbols.
+  	var regexAstralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
+  	// All ASCII symbols (not just printable ASCII) except those listed in the
+  	// first column of the overrides table.
+  	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides
+  	var regexAsciiWhitelist = /[\x01-\x7F]/g;
+  	// All BMP symbols that are not ASCII newlines, printable ASCII symbols, or
+  	// code points listed in the first column of the overrides table on
+  	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides.
+  	var regexBmpWhitelist = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g;
+
+  	var regexEncodeNonAscii = /<\u20D2|=\u20E5|>\u20D2|\u205F\u200A|\u219D\u0338|\u2202\u0338|\u2220\u20D2|\u2229\uFE00|\u222A\uFE00|\u223C\u20D2|\u223D\u0331|\u223E\u0333|\u2242\u0338|\u224B\u0338|\u224D\u20D2|\u224E\u0338|\u224F\u0338|\u2250\u0338|\u2261\u20E5|\u2264\u20D2|\u2265\u20D2|\u2266\u0338|\u2267\u0338|\u2268\uFE00|\u2269\uFE00|\u226A\u0338|\u226A\u20D2|\u226B\u0338|\u226B\u20D2|\u227F\u0338|\u2282\u20D2|\u2283\u20D2|\u228A\uFE00|\u228B\uFE00|\u228F\u0338|\u2290\u0338|\u2293\uFE00|\u2294\uFE00|\u22B4\u20D2|\u22B5\u20D2|\u22D8\u0338|\u22D9\u0338|\u22DA\uFE00|\u22DB\uFE00|\u22F5\u0338|\u22F9\u0338|\u2933\u0338|\u29CF\u0338|\u29D0\u0338|\u2A6D\u0338|\u2A70\u0338|\u2A7D\u0338|\u2A7E\u0338|\u2AA1\u0338|\u2AA2\u0338|\u2AAC\uFE00|\u2AAD\uFE00|\u2AAF\u0338|\u2AB0\u0338|\u2AC5\u0338|\u2AC6\u0338|\u2ACB\uFE00|\u2ACC\uFE00|\u2AFD\u20E5|[\xA0-\u0113\u0116-\u0122\u0124-\u012B\u012E-\u014D\u0150-\u017E\u0192\u01B5\u01F5\u0237\u02C6\u02C7\u02D8-\u02DD\u0311\u0391-\u03A1\u03A3-\u03A9\u03B1-\u03C9\u03D1\u03D2\u03D5\u03D6\u03DC\u03DD\u03F0\u03F1\u03F5\u03F6\u0401-\u040C\u040E-\u044F\u0451-\u045C\u045E\u045F\u2002-\u2005\u2007-\u2010\u2013-\u2016\u2018-\u201A\u201C-\u201E\u2020-\u2022\u2025\u2026\u2030-\u2035\u2039\u203A\u203E\u2041\u2043\u2044\u204F\u2057\u205F-\u2063\u20AC\u20DB\u20DC\u2102\u2105\u210A-\u2113\u2115-\u211E\u2122\u2124\u2127-\u2129\u212C\u212D\u212F-\u2131\u2133-\u2138\u2145-\u2148\u2153-\u215E\u2190-\u219B\u219D-\u21A7\u21A9-\u21AE\u21B0-\u21B3\u21B5-\u21B7\u21BA-\u21DB\u21DD\u21E4\u21E5\u21F5\u21FD-\u2205\u2207-\u2209\u220B\u220C\u220F-\u2214\u2216-\u2218\u221A\u221D-\u2238\u223A-\u2257\u2259\u225A\u225C\u225F-\u2262\u2264-\u228B\u228D-\u229B\u229D-\u22A5\u22A7-\u22B0\u22B2-\u22BB\u22BD-\u22DB\u22DE-\u22E3\u22E6-\u22F7\u22F9-\u22FE\u2305\u2306\u2308-\u2310\u2312\u2313\u2315\u2316\u231C-\u231F\u2322\u2323\u232D\u232E\u2336\u233D\u233F\u237C\u23B0\u23B1\u23B4-\u23B6\u23DC-\u23DF\u23E2\u23E7\u2423\u24C8\u2500\u2502\u250C\u2510\u2514\u2518\u251C\u2524\u252C\u2534\u253C\u2550-\u256C\u2580\u2584\u2588\u2591-\u2593\u25A1\u25AA\u25AB\u25AD\u25AE\u25B1\u25B3-\u25B5\u25B8\u25B9\u25BD-\u25BF\u25C2\u25C3\u25CA\u25CB\u25EC\u25EF\u25F8-\u25FC\u2605\u2606\u260E\u2640\u2642\u2660\u2663\u2665\u2666\u266A\u266D-\u266F\u2713\u2717\u2720\u2736\u2758\u2772\u2773\u27C8\u27C9\u27E6-\u27ED\u27F5-\u27FA\u27FC\u27FF\u2902-\u2905\u290C-\u2913\u2916\u2919-\u2920\u2923-\u292A\u2933\u2935-\u2939\u293C\u293D\u2945\u2948-\u294B\u294E-\u2976\u2978\u2979\u297B-\u297F\u2985\u2986\u298B-\u2996\u299A\u299C\u299D\u29A4-\u29B7\u29B9\u29BB\u29BC\u29BE-\u29C5\u29C9\u29CD-\u29D0\u29DC-\u29DE\u29E3-\u29E5\u29EB\u29F4\u29F6\u2A00-\u2A02\u2A04\u2A06\u2A0C\u2A0D\u2A10-\u2A17\u2A22-\u2A27\u2A29\u2A2A\u2A2D-\u2A31\u2A33-\u2A3C\u2A3F\u2A40\u2A42-\u2A4D\u2A50\u2A53-\u2A58\u2A5A-\u2A5D\u2A5F\u2A66\u2A6A\u2A6D-\u2A75\u2A77-\u2A9A\u2A9D-\u2AA2\u2AA4-\u2AB0\u2AB3-\u2AC8\u2ACB\u2ACC\u2ACF-\u2ADB\u2AE4\u2AE6-\u2AE9\u2AEB-\u2AF3\u2AFD\uFB00-\uFB04]|\uD835[\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDCCF\uDD04\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDD6B]/g;
+  	var encodeMap = 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','\u2A73':'Esim','\u2A77':'eDDot','\u2A78':'equivDD','\u2A79':'ltcir','\u2A7A':'gtcir','\u2A7B':'ltquest','\u2A7C':'gtquest','\u2A7D':'les','\u2A7D\u0338':'nles','\u2A7E':'ges','\u2A7E\u0338':'nges','\u2A7F':'lesdot','\u2A80':'gesdot','\u2A81':'lesdoto','\u2A82':'gesdoto','\u2A83':'lesdotor','\u2A84':'gesdotol','\u2A85':'lap','\u2A86':'gap','\u2A87':'lne','\u2A88':'gne','\u2A89':'lnap','\u2A8A':'gnap','\u2A8B':'lEg','\u2A8C':'gEl','\u2A8D':'lsime','\u2A8E':'gsime','\u2A8F':'lsimg','\u2A90':'gsiml','\u2A91':'lgE','\u2A92':'glE','\u2A93':'lesges','\u2A94':'gesles','\u2A95':'els','\u2A96':'egs','\u2A97':'elsdot','\u2A98':'egsdot','\u2A99':'el','\u2A9A':'eg','\u2A9D':'siml','\u2A9E':'simg','\u2A9F':'simlE','\u2AA0':'simgE','\u2AA1':'LessLess','\u2AA1\u0338':'NotNestedLessLess','\u2AA2':'GreaterGreater','\u2AA2\u0338':'NotNestedGreaterGreater','\u2AA4':'glj','\u2AA5':'gla','\u2AA6':'ltcc','\u2AA7':'gtcc','\u2AA8':'lescc','\u2AA9':'gescc','\u2AAA':'smt','\u2AAB':'lat','\u2AAC':'smte','\u2AAC\uFE00':'smtes','\u2AAD':'late','\u2AAD\uFE00':'lates','\u2AAE':'bumpE','\u2AAF':'pre','\u2AAF\u0338':'npre','\u2AB0':'sce','\u2AB0\u0338':'nsce','\u2AB3':'prE','\u2AB4':'scE','\u2AB5':'prnE','\u2AB6':'scnE','\u2AB7':'prap','\u2AB8':'scap','\u2AB9':'prnap','\u2ABA':'scnap','\u2ABB':'Pr','\u2ABC':'Sc','\u2ABD':'subdot','\u2ABE':'supdot','\u2ABF':'subplus','\u2AC0':'supplus','\u2AC1':'submult','\u2AC2':'supmult','\u2AC3':'subedot','\u2AC4':'supedot','\u2AC5':'subE','\u2AC5\u0338':'nsubE','\u2AC6':'supE','\u2AC6\u0338':'nsupE','\u2AC7':'subsim','\u2AC8':'supsim','\u2ACB\uFE00':'vsubnE','\u2ACB':'subnE','\u2ACC\uFE00':'vsupnE','\u2ACC':'supnE','\u2ACF':'csub','\u2AD0':'csup','\u2AD1':'csube','\u2AD2':'csupe','\u2AD3':'subsup','\u2AD4':'supsub','\u2AD5':'subsub','\u2AD6':'supsup','\u2AD7':'suphsub','\u2AD8':'supdsub','\u2AD9':'forkv','\u2ADA':'topfork','\u2ADB':'mlcp','\u2AE4':'Dashv','\u2AE6':'Vdashl','\u2AE7':'Barv','\u2AE8':'vBar','\u2AE9':'vBarv','\u2AEB':'Vbar','\u2AEC':'Not','\u2AED':'bNot','\u2AEE':'rnmid','\u2AEF':'cirmid','\u2AF0':'midcir','\u2AF1':'topcir','\u2AF2':'nhpar','\u2AF3':'parsim','\u2AFD':'parsl','\u2AFD\u20E5':'nparsl','\u266D':'flat','\u266E':'natur','\u266F':'sharp','\xA4':'curren','\xA2':'cent','$':'dollar','\xA3':'pound','\xA5':'yen','\u20AC':'euro','\xB9':'sup1','\xBD':'half','\u2153':'frac13','\xBC':'frac14','\u2155':'frac15','\u2159':'frac16','\u215B':'frac18','\xB2':'sup2','\u2154':'frac23','\u2156':'frac25','\xB3':'sup3','\xBE':'frac34','\u2157':'frac35','\u215C':'frac38','\u2158':'frac45','\u215A':'frac56','\u215D':'frac58','\u215E':'frac78','\uD835\uDCB6':'ascr','\uD835\uDD52':'aopf','\uD835\uDD1E':'afr','\uD835\uDD38':'Aopf','\uD835\uDD04':'Afr','\uD835\uDC9C':'Ascr','\xAA':'ordf','\xE1':'aacute','\xC1':'Aacute','\xE0':'agrave','\xC0':'Agrave','\u0103':'abreve','\u0102':'Abreve','\xE2':'acirc','\xC2':'Acirc','\xE5':'aring','\xC5':'angst','\xE4':'auml','\xC4':'Auml','\xE3':'atilde','\xC3':'Atilde','\u0105':'aogon','\u0104':'Aogon','\u0101':'amacr','\u0100':'Amacr','\xE6':'aelig','\xC6':'AElig','\uD835\uDCB7':'bscr','\uD835\uDD53':'bopf','\uD835\uDD1F':'bfr','\uD835\uDD39':'Bopf','\u212C':'Bscr','\uD835\uDD05':'Bfr','\uD835\uDD20':'cfr','\uD835\uDCB8':'cscr','\uD835\uDD54':'copf','\u212D':'Cfr','\uD835\uDC9E':'Cscr','\u2102':'Copf','\u0107':'cacute','\u0106':'Cacute','\u0109':'ccirc','\u0108':'Ccirc','\u010D':'ccaron','\u010C':'Ccaron','\u010B':'cdot','\u010A':'Cdot','\xE7':'ccedil','\xC7':'Ccedil','\u2105':'incare','\uD835\uDD21':'dfr','\u2146':'dd','\uD835\uDD55':'dopf','\uD835\uDCB9':'dscr','\uD835\uDC9F':'Dscr','\uD835\uDD07':'Dfr','\u2145':'DD','\uD835\uDD3B':'Dopf','\u010F':'dcaron','\u010E':'Dcaron','\u0111':'dstrok','\u0110':'Dstrok','\xF0':'eth','\xD0':'ETH','\u2147':'ee','\u212F':'escr','\uD835\uDD22':'efr','\uD835\uDD56':'eopf','\u2130':'Escr','\uD835\uDD08':'Efr','\uD835\uDD3C':'Eopf','\xE9':'eacute','\xC9':'Eacute','\xE8':'egrave','\xC8':'Egrave','\xEA':'ecirc','\xCA':'Ecirc','\u011B':'ecaron','\u011A':'Ecaron','\xEB':'euml','\xCB':'Euml','\u0117':'edot','\u0116':'Edot','\u0119':'eogon','\u0118':'Eogon','\u0113':'emacr','\u0112':'Emacr','\uD835\uDD23':'ffr','\uD835\uDD57':'fopf','\uD835\uDCBB':'fscr','\uD835\uDD09':'Ffr','\uD835\uDD3D':'Fopf','\u2131':'Fscr','\uFB00':'fflig','\uFB03':'ffilig','\uFB04':'ffllig','\uFB01':'filig','fj':'fjlig','\uFB02':'fllig','\u0192':'fnof','\u210A':'gscr','\uD835\uDD58':'gopf','\uD835\uDD24':'gfr','\uD835\uDCA2':'Gscr','\uD835\uDD3E':'Gopf','\uD835\uDD0A':'Gfr','\u01F5':'gacute','\u011F':'gbreve','\u011E':'Gbreve','\u011D':'gcirc','\u011C':'Gcirc','\u0121':'gdot','\u0120':'Gdot','\u0122':'Gcedil','\uD835\uDD25':'hfr','\u210E':'planckh','\uD835\uDCBD':'hscr','\uD835\uDD59':'hopf','\u210B':'Hscr','\u210C':'Hfr','\u210D':'Hopf','\u0125':'hcirc','\u0124':'Hcirc','\u210F':'hbar','\u0127':'hstrok','\u0126':'Hstrok','\uD835\uDD5A':'iopf','\uD835\uDD26':'ifr','\uD835\uDCBE':'iscr','\u2148':'ii','\uD835\uDD40':'Iopf','\u2110':'Iscr','\u2111':'Im','\xED':'iacute','\xCD':'Iacute','\xEC':'igrave','\xCC':'Igrave','\xEE':'icirc','\xCE':'Icirc','\xEF':'iuml','\xCF':'Iuml','\u0129':'itilde','\u0128':'Itilde','\u0130':'Idot','\u012F':'iogon','\u012E':'Iogon','\u012B':'imacr','\u012A':'Imacr','\u0133':'ijlig','\u0132':'IJlig','\u0131':'imath','\uD835\uDCBF':'jscr','\uD835\uDD5B':'jopf','\uD835\uDD27':'jfr','\uD835\uDCA5':'Jscr','\uD835\uDD0D':'Jfr','\uD835\uDD41':'Jopf','\u0135':'jcirc','\u0134':'Jcirc','\u0237':'jmath','\uD835\uDD5C':'kopf','\uD835\uDCC0':'kscr','\uD835\uDD28':'kfr','\uD835\uDCA6':'Kscr','\uD835\uDD42':'Kopf','\uD835\uDD0E':'Kfr','\u0137':'kcedil','\u0136':'Kcedil','\uD835\uDD29':'lfr','\uD835\uDCC1':'lscr','\u2113':'ell','\uD835\uDD5D':'lopf','\u2112':'Lscr','\uD835\uDD0F':'Lfr','\uD835\uDD43':'Lopf','\u013A':'lacute','\u0139':'Lacute','\u013E':'lcaron','\u013D':'Lcaron','\u013C':'lcedil','\u013B':'Lcedil','\u0142':'lstrok','\u0141':'Lstrok','\u0140':'lmidot','\u013F':'Lmidot','\uD835\uDD2A':'mfr','\uD835\uDD5E':'mopf','\uD835\uDCC2':'mscr','\uD835\uDD10':'Mfr','\uD835\uDD44':'Mopf','\u2133':'Mscr','\uD835\uDD2B':'nfr','\uD835\uDD5F':'nopf','\uD835\uDCC3':'nscr','\u2115':'Nopf','\uD835\uDCA9':'Nscr','\uD835\uDD11':'Nfr','\u0144':'nacute','\u0143':'Nacute','\u0148':'ncaron','\u0147':'Ncaron','\xF1':'ntilde','\xD1':'Ntilde','\u0146':'ncedil','\u0145':'Ncedil','\u2116':'numero','\u014B':'eng','\u014A':'ENG','\uD835\uDD60':'oopf','\uD835\uDD2C':'ofr','\u2134':'oscr','\uD835\uDCAA':'Oscr','\uD835\uDD12':'Ofr','\uD835\uDD46':'Oopf','\xBA':'ordm','\xF3':'oacute','\xD3':'Oacute','\xF2':'ograve','\xD2':'Ograve','\xF4':'ocirc','\xD4':'Ocirc','\xF6':'ouml','\xD6':'Ouml','\u0151':'odblac','\u0150':'Odblac','\xF5':'otilde','\xD5':'Otilde','\xF8':'oslash','\xD8':'Oslash','\u014D':'omacr','\u014C':'Omacr','\u0153':'oelig','\u0152':'OElig','\uD835\uDD2D':'pfr','\uD835\uDCC5':'pscr','\uD835\uDD61':'popf','\u2119':'Popf','\uD835\uDD13':'Pfr','\uD835\uDCAB':'Pscr','\uD835\uDD62':'qopf','\uD835\uDD2E':'qfr','\uD835\uDCC6':'qscr','\uD835\uDCAC':'Qscr','\uD835\uDD14':'Qfr','\u211A':'Qopf','\u0138':'kgreen','\uD835\uDD2F':'rfr','\uD835\uDD63':'ropf','\uD835\uDCC7':'rscr','\u211B':'Rscr','\u211C':'Re','\u211D':'Ropf','\u0155':'racute','\u0154':'Racute','\u0159':'rcaron','\u0158':'Rcaron','\u0157':'rcedil','\u0156':'Rcedil','\uD835\uDD64':'sopf','\uD835\uDCC8':'sscr','\uD835\uDD30':'sfr','\uD835\uDD4A':'Sopf','\uD835\uDD16':'Sfr','\uD835\uDCAE':'Sscr','\u24C8':'oS','\u015B':'sacute','\u015A':'Sacute','\u015D':'scirc','\u015C':'Scirc','\u0161':'scaron','\u0160':'Scaron','\u015F':'scedil','\u015E':'Scedil','\xDF':'szlig','\uD835\uDD31':'tfr','\uD835\uDCC9':'tscr','\uD835\uDD65':'topf','\uD835\uDCAF':'Tscr','\uD835\uDD17':'Tfr','\uD835\uDD4B':'Topf','\u0165':'tcaron','\u0164':'Tcaron','\u0163':'tcedil','\u0162':'Tcedil','\u2122':'trade','\u0167':'tstrok','\u0166':'Tstrok','\uD835\uDCCA':'uscr','\uD835\uDD66':'uopf','\uD835\uDD32':'ufr','\uD835\uDD4C':'Uopf','\uD835\uDD18':'Ufr','\uD835\uDCB0':'Uscr','\xFA':'uacute','\xDA':'Uacute','\xF9':'ugrave','\xD9':'Ugrave','\u016D':'ubreve','\u016C':'Ubreve','\xFB':'ucirc','\xDB':'Ucirc','\u016F':'uring','\u016E':'Uring','\xFC':'uuml','\xDC':'Uuml','\u0171':'udblac','\u0170':'Udblac','\u0169':'utilde','\u0168':'Utilde','\u0173':'uogon','\u0172':'Uogon','\u016B':'umacr','\u016A':'Umacr','\uD835\uDD33':'vfr','\uD835\uDD67':'vopf','\uD835\uDCCB':'vscr','\uD835\uDD19':'Vfr','\uD835\uDD4D':'Vopf','\uD835\uDCB1':'Vscr','\uD835\uDD68':'wopf','\uD835\uDCCC':'wscr','\uD835\uDD34':'wfr','\uD835\uDCB2':'Wscr','\uD835\uDD4E':'Wopf','\uD835\uDD1A':'Wfr','\u0175':'wcirc','\u0174':'Wcirc','\uD835\uDD35':'xfr','\uD835\uDCCD':'xscr','\uD835\uDD69':'xopf','\uD835\uDD4F':'Xopf','\uD835\uDD1B':'Xfr','\uD835\uDCB3':'Xscr','\uD835\uDD36':'yfr','\uD835\uDCCE':'yscr','\uD835\uDD6A':'yopf','\uD835\uDCB4':'Yscr','\uD835\uDD1C':'Yfr','\uD835\uDD50':'Yopf','\xFD':'yacute','\xDD':'Yacute','\u0177':'ycirc','\u0176':'Ycirc','\xFF':'yuml','\u0178':'Yuml','\uD835\uDCCF':'zscr','\uD835\uDD37':'zfr','\uD835\uDD6B':'zopf','\u2128':'Zfr','\u2124':'Zopf','\uD835\uDCB5':'Zscr','\u017A':'zacute','\u0179':'Zacute','\u017E':'zcaron','\u017D':'Zcaron','\u017C':'zdot','\u017B':'Zdot','\u01B5':'imped','\xFE':'thorn','\xDE':'THORN','\u0149':'napos','\u03B1':'alpha','\u0391':'Alpha','\u03B2':'beta','\u0392':'Beta','\u03B3':'gamma','\u0393':'Gamma','\u03B4':'delta','\u0394':'Delta','\u03B5':'epsi','\u03F5':'epsiv','\u0395':'Epsilon','\u03DD':'gammad','\u03DC':'Gammad','\u03B6':'zeta','\u0396':'Zeta','\u03B7':'eta','\u0397':'Eta','\u03B8':'theta','\u03D1':'thetav','\u0398':'Theta','\u03B9':'iota','\u0399':'Iota','\u03BA':'kappa','\u03F0':'kappav','\u039A':'Kappa','\u03BB':'lambda','\u039B':'Lambda','\u03BC':'mu','\xB5':'micro','\u039C':'Mu','\u03BD':'nu','\u039D':'Nu','\u03BE':'xi','\u039E':'Xi','\u03BF':'omicron','\u039F':'Omicron','\u03C0':'pi','\u03D6':'piv','\u03A0':'Pi','\u03C1':'rho','\u03F1':'rhov','\u03A1':'Rho','\u03C3':'sigma','\u03A3':'Sigma','\u03C2':'sigmaf','\u03C4':'tau','\u03A4':'Tau','\u03C5':'upsi','\u03A5':'Upsilon','\u03D2':'Upsi','\u03C6':'phi','\u03D5':'phiv','\u03A6':'Phi','\u03C7':'chi','\u03A7':'Chi','\u03C8':'psi','\u03A8':'Psi','\u03C9':'omega','\u03A9':'ohm','\u0430':'acy','\u0410':'Acy','\u0431':'bcy','\u0411':'Bcy','\u0432':'vcy','\u0412':'Vcy','\u0433':'gcy','\u0413':'Gcy','\u0453':'gjcy','\u0403':'GJcy','\u0434':'dcy','\u0414':'Dcy','\u0452':'djcy','\u0402':'DJcy','\u0435':'iecy','\u0415':'IEcy','\u0451':'iocy','\u0401':'IOcy','\u0454':'jukcy','\u0404':'Jukcy','\u0436':'zhcy','\u0416':'ZHcy','\u0437':'zcy','\u0417':'Zcy','\u0455':'dscy','\u0405':'DScy','\u0438':'icy','\u0418':'Icy','\u0456':'iukcy','\u0406':'Iukcy','\u0457':'yicy','\u0407':'YIcy','\u0439':'jcy','\u0419':'Jcy','\u0458':'jsercy','\u0408':'Jsercy','\u043A':'kcy','\u041A':'Kcy','\u045C':'kjcy','\u040C':'KJcy','\u043B':'lcy','\u041B':'Lcy','\u0459':'ljcy','\u0409':'LJcy','\u043C':'mcy','\u041C':'Mcy','\u043D':'ncy','\u041D':'Ncy','\u045A':'njcy','\u040A':'NJcy','\u043E':'ocy','\u041E':'Ocy','\u043F':'pcy','\u041F':'Pcy','\u0440':'rcy','\u0420':'Rcy','\u0441':'scy','\u0421':'Scy','\u0442':'tcy','\u0422':'Tcy','\u045B':'tshcy','\u040B':'TSHcy','\u0443':'ucy','\u0423':'Ucy','\u045E':'ubrcy','\u040E':'Ubrcy','\u0444':'fcy','\u0424':'Fcy','\u0445':'khcy','\u0425':'KHcy','\u0446':'tscy','\u0426':'TScy','\u0447':'chcy','\u0427':'CHcy','\u045F':'dzcy','\u040F':'DZcy','\u0448':'shcy','\u0428':'SHcy','\u0449':'shchcy','\u0429':'SHCHcy','\u044A':'hardcy','\u042A':'HARDcy','\u044B':'ycy','\u042B':'Ycy','\u044C':'softcy','\u042C':'SOFTcy','\u044D':'ecy','\u042D':'Ecy','\u044E':'yucy','\u042E':'YUcy','\u044F':'yacy','\u042F':'YAcy','\u2135':'aleph','\u2136':'beth','\u2137':'gimel','\u2138':'daleth'};
+
+  	var regexEscape = /["&'<>`]/g;
+  	var escapeMap = {
+  		'"': '&quot;',
+  		'&': '&amp;',
+  		'\'': '&#x27;',
+  		'<': '&lt;',
+  		// See https://mathiasbynens.be/notes/ambiguous-ampersands: in HTML, the
+  		// following is not strictly necessary unless it’s part of a tag or an
+  		// unquoted attribute value. We’re only escaping it to support those
+  		// situations, and for XML support.
+  		'>': '&gt;',
+  		// In Internet Explorer ≤ 8, the backtick character can be used
+  		// to break out of (un)quoted attribute values or HTML comments.
+  		// See http://html5sec.org/#102, http://html5sec.org/#108, and
+  		// http://html5sec.org/#133.
+  		'`': '&#x60;'
+  	};
+
+  	var regexInvalidEntity = /&#(?:[xX][^a-fA-F0-9]|[^0-9xX])/;
+  	var regexInvalidRawCodePoint = /[\0-\x08\x0B\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]|[\uD83F\uD87F\uD8BF\uD8FF\uD93F\uD97F\uD9BF\uD9FF\uDA3F\uDA7F\uDABF\uDAFF\uDB3F\uDB7F\uDBBF\uDBFF][\uDFFE\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+  	var regexDecode = /&(CounterClockwiseContourIntegral|DoubleLongLeftRightArrow|ClockwiseContourIntegral|NotNestedGreaterGreater|NotSquareSupersetEqual|DiacriticalDoubleAcute|NotRightTriangleEqual|NotSucceedsSlantEqual|NotPrecedesSlantEqual|CloseCurlyDoubleQuote|NegativeVeryThinSpace|DoubleContourIntegral|FilledVerySmallSquare|CapitalDifferentialD|OpenCurlyDoubleQuote|EmptyVerySmallSquare|NestedGreaterGreater|DoubleLongRightArrow|NotLeftTriangleEqual|NotGreaterSlantEqual|ReverseUpEquilibrium|DoubleLeftRightArrow|NotSquareSubsetEqual|NotDoubleVerticalBar|RightArrowLeftArrow|NotGreaterFullEqual|NotRightTriangleBar|SquareSupersetEqual|DownLeftRightVector|DoubleLongLeftArrow|leftrightsquigarrow|LeftArrowRightArrow|NegativeMediumSpace|blacktriangleright|RightDownVectorBar|PrecedesSlantEqual|RightDoubleBracket|SucceedsSlantEqual|NotLeftTriangleBar|RightTriangleEqual|SquareIntersection|RightDownTeeVector|ReverseEquilibrium|NegativeThickSpace|longleftrightarrow|Longleftrightarrow|LongLeftRightArrow|DownRightTeeVector|DownRightVectorBar|GreaterSlantEqual|SquareSubsetEqual|LeftDownVectorBar|LeftDoubleBracket|VerticalSeparator|rightleftharpoons|NotGreaterGreater|NotSquareSuperset|blacktriangleleft|blacktriangledown|NegativeThinSpace|LeftDownTeeVector|NotLessSlantEqual|leftrightharpoons|DoubleUpDownArrow|DoubleVerticalBar|LeftTriangleEqual|FilledSmallSquare|twoheadrightarrow|NotNestedLessLess|DownLeftTeeVector|DownLeftVectorBar|RightAngleBracket|NotTildeFullEqual|NotReverseElement|RightUpDownVector|DiacriticalTilde|NotSucceedsTilde|circlearrowright|NotPrecedesEqual|rightharpoondown|DoubleRightArrow|NotSucceedsEqual|NonBreakingSpace|NotRightTriangle|LessEqualGreater|RightUpTeeVector|LeftAngleBracket|GreaterFullEqual|DownArrowUpArrow|RightUpVectorBar|twoheadleftarrow|GreaterEqualLess|downharpoonright|RightTriangleBar|ntrianglerighteq|NotSupersetEqual|LeftUpDownVector|DiacriticalAcute|rightrightarrows|vartriangleright|UpArrowDownArrow|DiacriticalGrave|UnderParenthesis|EmptySmallSquare|LeftUpVectorBar|leftrightarrows|DownRightVector|downharpoonleft|trianglerighteq|ShortRightArrow|OverParenthesis|DoubleLeftArrow|DoubleDownArrow|NotSquareSubset|bigtriangledown|ntrianglelefteq|UpperRightArrow|curvearrowright|vartriangleleft|NotLeftTriangle|nleftrightarrow|LowerRightArrow|NotHumpDownHump|NotGreaterTilde|rightthreetimes|LeftUpTeeVector|NotGreaterEqual|straightepsilon|LeftTriangleBar|rightsquigarrow|ContourIntegral|rightleftarrows|CloseCurlyQuote|RightDownVector|LeftRightVector|nLeftrightarrow|leftharpoondown|circlearrowleft|SquareSuperset|OpenCurlyQuote|hookrightarrow|HorizontalLine|DiacriticalDot|NotLessGreater|ntriangleright|DoubleRightTee|InvisibleComma|InvisibleTimes|LowerLeftArrow|DownLeftVector|NotSubsetEqual|curvearrowleft|trianglelefteq|NotVerticalBar|TildeFullEqual|downdownarrows|NotGreaterLess|RightTeeVector|ZeroWidthSpace|looparrowright|LongRightArrow|doublebarwedge|ShortLeftArrow|ShortDownArrow|RightVectorBar|GreaterGreater|ReverseElement|rightharpoonup|LessSlantEqual|leftthreetimes|upharpoonright|rightarrowtail|LeftDownVector|Longrightarrow|NestedLessLess|UpperLeftArrow|nshortparallel|leftleftarrows|leftrightarrow|Leftrightarrow|LeftRightArrow|longrightarrow|upharpoonleft|RightArrowBar|ApplyFunction|LeftTeeVector|leftarrowtail|NotEqualTilde|varsubsetneqq|varsupsetneqq|RightTeeArrow|SucceedsEqual|SucceedsTilde|LeftVectorBar|SupersetEqual|hookleftarrow|DifferentialD|VerticalTilde|VeryThinSpace|blacktriangle|bigtriangleup|LessFullEqual|divideontimes|leftharpoonup|UpEquilibrium|ntriangleleft|RightTriangle|measuredangle|shortparallel|longleftarrow|Longleftarrow|LongLeftArrow|DoubleLeftTee|Poincareplane|PrecedesEqual|triangleright|DoubleUpArrow|RightUpVector|fallingdotseq|looparrowleft|PrecedesTilde|NotTildeEqual|NotTildeTilde|smallsetminus|Proportional|triangleleft|triangledown|UnderBracket|NotHumpEqual|exponentiale|ExponentialE|NotLessTilde|HilbertSpace|RightCeiling|blacklozenge|varsupsetneq|HumpDownHump|GreaterEqual|VerticalLine|LeftTeeArrow|NotLessEqual|DownTeeArrow|LeftTriangle|varsubsetneq|Intersection|NotCongruent|DownArrowBar|LeftUpVector|LeftArrowBar|risingdotseq|GreaterTilde|RoundImplies|SquareSubset|ShortUpArrow|NotSuperset|quaternions|precnapprox|backepsilon|preccurlyeq|OverBracket|blacksquare|MediumSpace|VerticalBar|circledcirc|circleddash|CircleMinus|CircleTimes|LessGreater|curlyeqprec|curlyeqsucc|diamondsuit|UpDownArrow|Updownarrow|RuleDelayed|Rrightarrow|updownarrow|RightVector|nRightarrow|nrightarrow|eqslantless|LeftCeiling|Equilibrium|SmallCircle|expectation|NotSucceeds|thickapprox|GreaterLess|SquareUnion|NotPrecedes|NotLessLess|straightphi|succnapprox|succcurlyeq|SubsetEqual|sqsupseteq|Proportion|Laplacetrf|ImaginaryI|supsetneqq|NotGreater|gtreqqless|NotElement|ThickSpace|TildeEqual|TildeTilde|Fouriertrf|rmoustache|EqualTilde|eqslantgtr|UnderBrace|LeftVector|UpArrowBar|nLeftarrow|nsubseteqq|subsetneqq|nsupseteqq|nleftarrow|succapprox|lessapprox|UpTeeArrow|upuparrows|curlywedge|lesseqqgtr|varepsilon|varnothing|RightFloor|c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|Fscr|gdot|gsim|Gscr|gscr|Gopf|gopf|gneq|Gdot|tosa|gnap|Topf|topf|geqq|toea|GJcy|gjcy|tint|gesl|mid|Sfr|ggg|top|ges|gla|glE|glj|geq|gne|gEl|gel|gnE|Gcy|gcy|gap|Tfr|tfr|Tcy|tcy|Hat|Tau|Ffr|tau|Tab|hfr|Hfr|ffr|Fcy|fcy|icy|Icy|iff|ETH|eth|ifr|Ifr|Eta|eta|int|Int|Sup|sup|ucy|Ucy|Sum|sum|jcy|ENG|ufr|Ufr|eng|Jcy|jfr|els|ell|egs|Efr|efr|Jfr|uml|kcy|Kcy|Ecy|ecy|kfr|Kfr|lap|Sub|sub|lat|lcy|Lcy|leg|Dot|dot|lEg|leq|les|squ|div|die|lfr|Lfr|lgE|Dfr|dfr|Del|deg|Dcy|dcy|lne|lnE|sol|loz|smt|Cup|lrm|cup|lsh|Lsh|sim|shy|map|Map|mcy|Mcy|mfr|Mfr|mho|gfr|Gfr|sfr|cir|Chi|chi|nap|Cfr|vcy|Vcy|cfr|Scy|scy|ncy|Ncy|vee|Vee|Cap|cap|nfr|scE|sce|Nfr|nge|ngE|nGg|vfr|Vfr|ngt|bot|nGt|nis|niv|Rsh|rsh|nle|nlE|bne|Bfr|bfr|nLl|nlt|nLt|Bcy|bcy|not|Not|rlm|wfr|Wfr|npr|nsc|num|ocy|ast|Ocy|ofr|xfr|Xfr|Ofr|ogt|ohm|apE|olt|Rho|ape|rho|Rfr|rfr|ord|REG|ang|reg|orv|And|and|AMP|Rcy|amp|Afr|ycy|Ycy|yen|yfr|Yfr|rcy|par|pcy|Pcy|pfr|Pfr|phi|Phi|afr|Acy|acy|zcy|Zcy|piv|acE|acd|zfr|Zfr|pre|prE|psi|Psi|qfr|Qfr|zwj|Or|ge|Gg|gt|gg|el|oS|lt|Lt|LT|Re|lg|gl|eg|ne|Im|it|le|DD|wp|wr|nu|Nu|dd|lE|Sc|sc|pi|Pi|ee|af|ll|Ll|rx|gE|xi|pm|Xi|ic|pr|Pr|in|ni|mp|mu|ac|Mu|or|ap|Gt|GT|ii);|&(Aacute|Agrave|Atilde|Ccedil|Eacute|Egrave|Iacute|Igrave|Ntilde|Oacute|Ograve|Oslash|Otilde|Uacute|Ugrave|Yacute|aacute|agrave|atilde|brvbar|ccedil|curren|divide|eacute|egrave|frac12|frac14|frac34|iacute|igrave|iquest|middot|ntilde|oacute|ograve|oslash|otilde|plusmn|uacute|ugrave|yacute|AElig|Acirc|Aring|Ecirc|Icirc|Ocirc|THORN|Ucirc|acirc|acute|aelig|aring|cedil|ecirc|icirc|iexcl|laquo|micro|ocirc|pound|raquo|szlig|thorn|times|ucirc|Auml|COPY|Euml|Iuml|Ouml|QUOT|Uuml|auml|cent|copy|euml|iuml|macr|nbsp|ordf|ordm|ouml|para|quot|sect|sup1|sup2|sup3|uuml|yuml|AMP|ETH|REG|amp|deg|eth|not|reg|shy|uml|yen|GT|LT|gt|lt)(?!;)([=a-zA-Z0-9]?)|&#([0-9]+)(;?)|&#[xX]([a-fA-F0-9]+)(;?)|&([0-9a-zA-Z]+)/g;
+  	var decodeMap = {'aacute':'\xE1','Aacute':'\xC1','abreve':'\u0103','Abreve':'\u0102','ac':'\u223E','acd':'\u223F','acE':'\u223E\u0333','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','acy':'\u0430','Acy':'\u0410','aelig':'\xE6','AElig':'\xC6','af':'\u2061','afr':'\uD835\uDD1E','Afr':'\uD835\uDD04','agrave':'\xE0','Agrave':'\xC0','alefsym':'\u2135','aleph':'\u2135','alpha':'\u03B1','Alpha':'\u0391','amacr':'\u0101','Amacr':'\u0100','amalg':'\u2A3F','amp':'&','AMP':'&','and':'\u2227','And':'\u2A53','andand':'\u2A55','andd':'\u2A5C','andslope':'\u2A58','andv':'\u2A5A','ang':'\u2220','ange':'\u29A4','angle':'\u2220','angmsd':'\u2221','angmsdaa':'\u29A8','angmsdab':'\u29A9','angmsdac':'\u29AA','angmsdad':'\u29AB','angmsdae':'\u29AC','angmsdaf':'\u29AD','angmsdag':'\u29AE','angmsdah':'\u29AF','angrt':'\u221F','angrtvb':'\u22BE','angrtvbd':'\u299D','angsph':'\u2222','angst':'\xC5','angzarr':'\u237C','aogon':'\u0105','Aogon':'\u0104','aopf':'\uD835\uDD52','Aopf':'\uD835\uDD38','ap':'\u2248','apacir':'\u2A6F','ape':'\u224A','apE':'\u2A70','apid':'\u224B','apos':'\'','ApplyFunction':'\u2061','approx':'\u2248','approxeq':'\u224A','aring':'\xE5','Aring':'\xC5','ascr':'\uD835\uDCB6','Ascr':'\uD835\uDC9C','Assign':'\u2254','ast':'*','asymp':'\u2248','asympeq':'\u224D','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','awconint':'\u2233','awint':'\u2A11','backcong':'\u224C','backepsilon':'\u03F6','backprime':'\u2035','backsim':'\u223D','backsimeq':'\u22CD','Backslash':'\u2216','Barv':'\u2AE7','barvee':'\u22BD','barwed':'\u2305','Barwed':'\u2306','barwedge':'\u2305','bbrk':'\u23B5','bbrktbrk':'\u23B6','bcong':'\u224C','bcy':'\u0431','Bcy':'\u0411','bdquo':'\u201E','becaus':'\u2235','because':'\u2235','Because':'\u2235','bemptyv':'\u29B0','bepsi':'\u03F6','bernou':'\u212C','Bernoullis':'\u212C','beta':'\u03B2','Beta':'\u0392','beth':'\u2136','between':'\u226C','bfr':'\uD835\uDD1F','Bfr':'\uD835\uDD05','bigcap':'\u22C2','bigcirc':'\u25EF','bigcup':'\u22C3','bigodot':'\u2A00','bigoplus':'\u2A01','bigotimes':'\u2A02','bigsqcup':'\u2A06','bigstar':'\u2605','bigtriangledown':'\u25BD','bigtriangleup':'\u25B3','biguplus':'\u2A04','bigvee':'\u22C1','bigwedge':'\u22C0','bkarow':'\u290D','blacklozenge':'\u29EB','blacksquare':'\u25AA','blacktriangle':'\u25B4','blacktriangledown':'\u25BE','blacktriangleleft':'\u25C2','blacktriangleright':'\u25B8','blank':'\u2423','blk12':'\u2592','blk14':'\u2591','blk34':'\u2593','block':'\u2588','bne':'=\u20E5','bnequiv':'\u2261\u20E5','bnot':'\u2310','bNot':'\u2AED','bopf':'\uD835\uDD53','Bopf':'\uD835\uDD39','bot':'\u22A5','bottom':'\u22A5','bowtie':'\u22C8','boxbox':'\u29C9','boxdl':'\u2510','boxdL':'\u2555','boxDl':'\u2556','boxDL':'\u2557','boxdr':'\u250C','boxdR':'\u2552','boxDr':'\u2553','boxDR':'\u2554','boxh':'\u2500','boxH':'\u2550','boxhd':'\u252C','boxhD':'\u2565','boxHd':'\u2564','boxHD':'\u2566','boxhu':'\u2534','boxhU':'\u2568','boxHu':'\u2567','boxHU':'\u2569','boxminus':'\u229F','boxplus':'\u229E','boxtimes':'\u22A0','boxul':'\u2518','boxuL':'\u255B','boxUl':'\u255C','boxUL':'\u255D','boxur':'\u2514','boxuR':'\u2558','boxUr':'\u2559','boxUR':'\u255A','boxv':'\u2502','boxV':'\u2551','boxvh':'\u253C','boxvH':'\u256A','boxVh':'\u256B','boxVH':'\u256C','boxvl':'\u2524','boxvL':'\u2561','boxVl':'\u2562','boxVL':'\u2563','boxvr':'\u251C','boxvR':'\u255E','boxVr':'\u255F','boxVR':'\u2560','bprime':'\u2035','breve':'\u02D8','Breve':'\u02D8','brvbar':'\xA6','bscr':'\uD835\uDCB7','Bscr':'\u212C','bsemi':'\u204F','bsim':'\u223D','bsime':'\u22CD','bsol':'\\','bsolb':'\u29C5','bsolhsub':'\u27C8','bull':'\u2022','bullet':'\u2022','bump':'\u224E','bumpe':'\u224F','bumpE':'\u2AAE','bumpeq':'\u224F','Bumpeq':'\u224E','cacute':'\u0107','Cacute':'\u0106','cap':'\u2229','Cap':'\u22D2','capand':'\u2A44','capbrcup':'\u2A49','capcap':'\u2A4B','capcup':'\u2A47','capdot':'\u2A40','CapitalDifferentialD':'\u2145','caps':'\u2229\uFE00','caret':'\u2041','caron':'\u02C7','Cayleys':'\u212D','ccaps':'\u2A4D','ccaron':'\u010D','Ccaron':'\u010C','ccedil':'\xE7','Ccedil':'\xC7','ccirc':'\u0109','Ccirc':'\u0108','Cconint':'\u2230','ccups':'\u2A4C','ccupssm':'\u2A50','cdot':'\u010B','Cdot':'\u010A','cedil':'\xB8','Cedilla':'\xB8','cemptyv':'\u29B2','cent':'\xA2','centerdot':'\xB7','CenterDot':'\xB7','cfr':'\uD835\uDD20','Cfr':'\u212D','chcy':'\u0447','CHcy':'\u0427','check':'\u2713','checkmark':'\u2713','chi':'\u03C7','Chi':'\u03A7','cir':'\u25CB','circ':'\u02C6','circeq':'\u2257','circlearrowleft':'\u21BA','circlearrowright':'\u21BB','circledast':'\u229B','circledcirc':'\u229A','circleddash':'\u229D','CircleDot':'\u2299','circledR':'\xAE','circledS':'\u24C8','CircleMinus':'\u2296','CirclePlus':'\u2295','CircleTimes':'\u2297','cire':'\u2257','cirE':'\u29C3','cirfnint':'\u2A10','cirmid':'\u2AEF','cirscir':'\u29C2','ClockwiseContourIntegral':'\u2232','CloseCurlyDoubleQuote':'\u201D','CloseCurlyQuote':'\u2019','clubs':'\u2663','clubsuit':'\u2663','colon':':','Colon':'\u2237','colone':'\u2254','Colone':'\u2A74','coloneq':'\u2254','comma':',','commat':'@','comp':'\u2201','compfn':'\u2218','complement':'\u2201','complexes':'\u2102','cong':'\u2245','congdot':'\u2A6D','Congruent':'\u2261','conint':'\u222E','Conint':'\u222F','ContourIntegral':'\u222E','copf':'\uD835\uDD54','Copf':'\u2102','coprod':'\u2210','Coproduct':'\u2210','copy':'\xA9','COPY':'\xA9','copysr':'\u2117','CounterClockwiseContourIntegral':'\u2233','crarr':'\u21B5','cross':'\u2717','Cross':'\u2A2F','cscr':'\uD835\uDCB8','Cscr':'\uD835\uDC9E','csub':'\u2ACF','csube':'\u2AD1','csup':'\u2AD0','csupe':'\u2AD2','ctdot':'\u22EF','cudarrl':'\u2938','cudarrr':'\u2935','cuepr':'\u22DE','cuesc':'\u22DF','cularr':'\u21B6','cularrp':'\u293D','cup':'\u222A','Cup':'\u22D3','cupbrcap':'\u2A48','cupcap':'\u2A46','CupCap':'\u224D','cupcup':'\u2A4A','cupdot':'\u228D','cupor':'\u2A45','cups':'\u222A\uFE00','curarr':'\u21B7','curarrm':'\u293C','curlyeqprec':'\u22DE','curlyeqsucc':'\u22DF','curlyvee':'\u22CE','curlywedge':'\u22CF','curren':'\xA4','curvearrowleft':'\u21B6','curvearrowright':'\u21B7','cuvee':'\u22CE','cuwed':'\u22CF','cwconint':'\u2232','cwint':'\u2231','cylcty':'\u232D','dagger':'\u2020','Dagger':'\u2021','daleth':'\u2138','darr':'\u2193','dArr':'\u21D3','Darr':'\u21A1','dash':'\u2010','dashv':'\u22A3','Dashv':'\u2AE4','dbkarow':'\u290F','dblac':'\u02DD','dcaron':'\u010F','Dcaron':'\u010E','dcy':'\u0434','Dcy':'\u0414','dd':'\u2146','DD':'\u2145','ddagger':'\u2021','ddarr':'\u21CA','DDotrahd':'\u2911','ddotseq':'\u2A77','deg':'\xB0','Del':'\u2207','delta':'\u03B4','Delta':'\u0394','demptyv':'\u29B1','dfisht':'\u297F','dfr':'\uD835\uDD21','Dfr':'\uD835\uDD07','dHar':'\u2965','dharl':'\u21C3','dharr':'\u21C2','DiacriticalAcute':'\xB4','DiacriticalDot':'\u02D9','DiacriticalDoubleAcute':'\u02DD','DiacriticalGrave':'`','DiacriticalTilde':'\u02DC','diam':'\u22C4','diamond':'\u22C4','Diamond':'\u22C4','diamondsuit':'\u2666','diams':'\u2666','die':'\xA8','DifferentialD':'\u2146','digamma':'\u03DD','disin':'\u22F2','div':'\xF7','divide':'\xF7','divideontimes':'\u22C7','divonx':'\u22C7','djcy':'\u0452','DJcy':'\u0402','dlcorn':'\u231E','dlcrop':'\u230D','dollar':'$','dopf':'\uD835\uDD55','Dopf':'\uD835\uDD3B','dot':'\u02D9','Dot':'\xA8','DotDot':'\u20DC','doteq':'\u2250','doteqdot':'\u2251','DotEqual':'\u2250','dotminus':'\u2238','dotplus':'\u2214','dotsquare':'\u22A1','doublebarwedge':'\u2306','DoubleContourIntegral':'\u222F','DoubleDot':'\xA8','DoubleDownArrow':'\u21D3','DoubleLeftArrow':'\u21D0','DoubleLeftRightArrow':'\u21D4','DoubleLeftTee':'\u2AE4','DoubleLongLeftArrow':'\u27F8','DoubleLongLeftRightArrow':'\u27FA','DoubleLongRightArrow':'\u27F9','DoubleRightArrow':'\u21D2','DoubleRightTee':'\u22A8','DoubleUpArrow':'\u21D1','DoubleUpDownArrow':'\u21D5','DoubleVerticalBar':'\u2225','downarrow':'\u2193','Downarrow':'\u21D3','DownArrow':'\u2193','DownArrowBar':'\u2913','DownArrowUpArrow':'\u21F5','DownBreve':'\u0311','downdownarrows':'\u21CA','downharpoonleft':'\u21C3','downharpoonright':'\u21C2','DownLeftRightVector':'\u2950','DownLeftTeeVector':'\u295E','DownLeftVector':'\u21BD','DownLeftVectorBar':'\u2956','DownRightTeeVector':'\u295F','DownRightVector':'\u21C1','DownRightVectorBar':'\u2957','DownTee':'\u22A4','DownTeeArrow':'\u21A7','drbkarow':'\u2910','drcorn':'\u231F','drcrop':'\u230C','dscr':'\uD835\uDCB9','Dscr':'\uD835\uDC9F','dscy':'\u0455','DScy':'\u0405','dsol':'\u29F6','dstrok':'\u0111','Dstrok':'\u0110','dtdot':'\u22F1','dtri':'\u25BF','dtrif':'\u25BE','duarr':'\u21F5','duhar':'\u296F','dwangle':'\u29A6','dzcy':'\u045F','DZcy':'\u040F','dzigrarr':'\u27FF','eacute':'\xE9','Eacute':'\xC9','easter':'\u2A6E','ecaron':'\u011B','Ecaron':'\u011A','ecir':'\u2256','ecirc':'\xEA','Ecirc':'\xCA','ecolon':'\u2255','ecy':'\u044D','Ecy':'\u042D','eDDot':'\u2A77','edot':'\u0117','eDot':'\u2251','Edot':'\u0116','ee':'\u2147','efDot':'\u2252','efr':'\uD835\uDD22','Efr':'\uD835\uDD08','eg':'\u2A9A','egrave':'\xE8','Egrave':'\xC8','egs':'\u2A96','egsdot':'\u2A98','el':'\u2A99','Element':'\u2208','elinters':'\u23E7','ell':'\u2113','els':'\u2A95','elsdot':'\u2A97','emacr':'\u0113','Emacr':'\u0112','empty':'\u2205','emptyset':'\u2205','EmptySmallSquare':'\u25FB','emptyv':'\u2205','EmptyVerySmallSquare':'\u25AB','emsp':'\u2003','emsp13':'\u2004','emsp14':'\u2005','eng':'\u014B','ENG':'\u014A','ensp':'\u2002','eogon':'\u0119','Eogon':'\u0118','eopf':'\uD835\uDD56','Eopf':'\uD835\uDD3C','epar':'\u22D5','eparsl':'\u29E3','eplus':'\u2A71','epsi':'\u03B5','epsilon':'\u03B5','Epsilon':'\u0395','epsiv':'\u03F5','eqcirc':'\u2256','eqcolon':'\u2255','eqsim':'\u2242','eqslantgtr':'\u2A96','eqslantless':'\u2A95','Equal':'\u2A75','equals':'=','EqualTilde':'\u2242','equest':'\u225F','Equilibrium':'\u21CC','equiv':'\u2261','equivDD':'\u2A78','eqvparsl':'\u29E5','erarr':'\u2971','erDot':'\u2253','escr':'\u212F','Escr':'\u2130','esdot':'\u2250','esim':'\u2242','Esim':'\u2A73','eta':'\u03B7','Eta':'\u0397','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','euro':'\u20AC','excl':'!','exist':'\u2203','Exists':'\u2203','expectation':'\u2130','exponentiale':'\u2147','ExponentialE':'\u2147','fallingdotseq':'\u2252','fcy':'\u0444','Fcy':'\u0424','female':'\u2640','ffilig':'\uFB03','fflig':'\uFB00','ffllig':'\uFB04','ffr':'\uD835\uDD23','Ffr':'\uD835\uDD09','filig':'\uFB01','FilledSmallSquare':'\u25FC','FilledVerySmallSquare':'\u25AA','fjlig':'fj','flat':'\u266D','fllig':'\uFB02','fltns':'\u25B1','fnof':'\u0192','fopf':'\uD835\uDD57','Fopf':'\uD835\uDD3D','forall':'\u2200','ForAll':'\u2200','fork':'\u22D4','forkv':'\u2AD9','Fouriertrf':'\u2131','fpartint':'\u2A0D','frac12':'\xBD','frac13':'\u2153','frac14':'\xBC','frac15':'\u2155','frac16':'\u2159','frac18':'\u215B','frac23':'\u2154','frac25':'\u2156','frac34':'\xBE','frac35':'\u2157','frac38':'\u215C','frac45':'\u2158','frac56':'\u215A','frac58':'\u215D','frac78':'\u215E','frasl':'\u2044','frown':'\u2322','fscr':'\uD835\uDCBB','Fscr':'\u2131','gacute':'\u01F5','gamma':'\u03B3','Gamma':'\u0393','gammad':'\u03DD','Gammad':'\u03DC','gap':'\u2A86','gbreve':'\u011F','Gbreve':'\u011E','Gcedil':'\u0122','gcirc':'\u011D','Gcirc':'\u011C','gcy':'\u0433','Gcy':'\u0413','gdot':'\u0121','Gdot':'\u0120','ge':'\u2265','gE':'\u2267','gel':'\u22DB','gEl':'\u2A8C','geq':'\u2265','geqq':'\u2267','geqslant':'\u2A7E','ges':'\u2A7E','gescc':'\u2AA9','gesdot':'\u2A80','gesdoto':'\u2A82','gesdotol':'\u2A84','gesl':'\u22DB\uFE00','gesles':'\u2A94','gfr':'\uD835\uDD24','Gfr':'\uD835\uDD0A','gg':'\u226B','Gg':'\u22D9','ggg':'\u22D9','gimel':'\u2137','gjcy':'\u0453','GJcy':'\u0403','gl':'\u2277','gla':'\u2AA5','glE':'\u2A92','glj':'\u2AA4','gnap':'\u2A8A','gnapprox':'\u2A8A','gne':'\u2A88','gnE':'\u2269','gneq':'\u2A88','gneqq':'\u2269','gnsim':'\u22E7','gopf':'\uD835\uDD58','Gopf':'\uD835\uDD3E','grave':'`','GreaterEqual':'\u2265','GreaterEqualLess':'\u22DB','GreaterFullEqual':'\u2267','GreaterGreater':'\u2AA2','GreaterLess':'\u2277','GreaterSlantEqual':'\u2A7E','GreaterTilde':'\u2273','gscr':'\u210A','Gscr':'\uD835\uDCA2','gsim':'\u2273','gsime':'\u2A8E','gsiml':'\u2A90','gt':'>','Gt':'\u226B','GT':'>','gtcc':'\u2AA7','gtcir':'\u2A7A','gtdot':'\u22D7','gtlPar':'\u2995','gtquest':'\u2A7C','gtrapprox':'\u2A86','gtrarr':'\u2978','gtrdot':'\u22D7','gtreqless':'\u22DB','gtreqqless':'\u2A8C','gtrless':'\u2277','gtrsim':'\u2273','gvertneqq':'\u2269\uFE00','gvnE':'\u2269\uFE00','Hacek':'\u02C7','hairsp':'\u200A','half':'\xBD','hamilt':'\u210B','hardcy':'\u044A','HARDcy':'\u042A','harr':'\u2194','hArr':'\u21D4','harrcir':'\u2948','harrw':'\u21AD','Hat':'^','hbar':'\u210F','hcirc':'\u0125','Hcirc':'\u0124','hearts':'\u2665','heartsuit':'\u2665','hellip':'\u2026','hercon':'\u22B9','hfr':'\uD835\uDD25','Hfr':'\u210C','HilbertSpace':'\u210B','hksearow':'\u2925','hkswarow':'\u2926','hoarr':'\u21FF','homtht':'\u223B','hookleftarrow':'\u21A9','hookrightarrow':'\u21AA','hopf':'\uD835\uDD59','Hopf':'\u210D','horbar':'\u2015','HorizontalLine':'\u2500','hscr':'\uD835\uDCBD','Hscr':'\u210B','hslash':'\u210F','hstrok':'\u0127','Hstrok':'\u0126','HumpDownHump':'\u224E','HumpEqual':'\u224F','hybull':'\u2043','hyphen':'\u2010','iacute':'\xED','Iacute':'\xCD','ic':'\u2063','icirc':'\xEE','Icirc':'\xCE','icy':'\u0438','Icy':'\u0418','Idot':'\u0130','iecy':'\u0435','IEcy':'\u0415','iexcl':'\xA1','iff':'\u21D4','ifr':'\uD835\uDD26','Ifr':'\u2111','igrave':'\xEC','Igrave':'\xCC','ii':'\u2148','iiiint':'\u2A0C','iiint':'\u222D','iinfin':'\u29DC','iiota':'\u2129','ijlig':'\u0133','IJlig':'\u0132','Im':'\u2111','imacr':'\u012B','Imacr':'\u012A','image':'\u2111','ImaginaryI':'\u2148','imagline':'\u2110','imagpart':'\u2111','imath':'\u0131','imof':'\u22B7','imped':'\u01B5','Implies':'\u21D2','in':'\u2208','incare':'\u2105','infin':'\u221E','infintie':'\u29DD','inodot':'\u0131','int':'\u222B','Int':'\u222C','intcal':'\u22BA','integers':'\u2124','Integral':'\u222B','intercal':'\u22BA','Intersection':'\u22C2','intlarhk':'\u2A17','intprod':'\u2A3C','InvisibleComma':'\u2063','InvisibleTimes':'\u2062','iocy':'\u0451','IOcy':'\u0401','iogon':'\u012F','Iogon':'\u012E','iopf':'\uD835\uDD5A','Iopf':'\uD835\uDD40','iota':'\u03B9','Iota':'\u0399','iprod':'\u2A3C','iquest':'\xBF','iscr':'\uD835\uDCBE','Iscr':'\u2110','isin':'\u2208','isindot':'\u22F5','isinE':'\u22F9','isins':'\u22F4','isinsv':'\u22F3','isinv':'\u2208','it':'\u2062','itilde':'\u0129','Itilde':'\u0128','iukcy':'\u0456','Iukcy':'\u0406','iuml':'\xEF','Iuml':'\xCF','jcirc':'\u0135','Jcirc':'\u0134','jcy':'\u0439','Jcy':'\u0419','jfr':'\uD835\uDD27','Jfr':'\uD835\uDD0D','jmath':'\u0237','jopf':'\uD835\uDD5B','Jopf':'\uD835\uDD41','jscr':'\uD835\uDCBF','Jscr':'\uD835\uDCA5','jsercy':'\u0458','Jsercy':'\u0408','jukcy':'\u0454','Jukcy':'\u0404','kappa':'\u03BA','Kappa':'\u039A','kappav':'\u03F0','kcedil':'\u0137','Kcedil':'\u0136','kcy':'\u043A','Kcy':'\u041A','kfr':'\uD835\uDD28','Kfr':'\uD835\uDD0E','kgreen':'\u0138','khcy':'\u0445','KHcy':'\u0425','kjcy':'\u045C','KJcy':'\u040C','kopf':'\uD835\uDD5C','Kopf':'\uD835\uDD42','kscr':'\uD835\uDCC0','Kscr':'\uD835\uDCA6','lAarr':'\u21DA','lacute':'\u013A','Lacute':'\u0139','laemptyv':'\u29B4','lagran':'\u2112','lambda':'\u03BB','Lambda':'\u039B','lang':'\u27E8','Lang':'\u27EA','langd':'\u2991','langle':'\u27E8','lap':'\u2A85','Laplacetrf':'\u2112','laquo':'\xAB','larr':'\u2190','lArr':'\u21D0','Larr':'\u219E','larrb':'\u21E4','larrbfs':'\u291F','larrfs':'\u291D','larrhk':'\u21A9','larrlp':'\u21AB','larrpl':'\u2939','larrsim':'\u2973','larrtl':'\u21A2','lat':'\u2AAB','latail':'\u2919','lAtail':'\u291B','late':'\u2AAD','lates':'\u2AAD\uFE00','lbarr':'\u290C','lBarr':'\u290E','lbbrk':'\u2772','lbrace':'{','lbrack':'[','lbrke':'\u298B','lbrksld':'\u298F','lbrkslu':'\u298D','lcaron':'\u013E','Lcaron':'\u013D','lcedil':'\u013C','Lcedil':'\u013B','lceil':'\u2308','lcub':'{','lcy':'\u043B','Lcy':'\u041B','ldca':'\u2936','ldquo':'\u201C','ldquor':'\u201E','ldrdhar':'\u2967','ldrushar':'\u294B','ldsh':'\u21B2','le':'\u2264','lE':'\u2266','LeftAngleBracket':'\u27E8','leftarrow':'\u2190','Leftarrow':'\u21D0','LeftArrow':'\u2190','LeftArrowBar':'\u21E4','LeftArrowRightArrow':'\u21C6','leftarrowtail':'\u21A2','LeftCeiling':'\u2308','LeftDoubleBracket':'\u27E6','LeftDownTeeVector':'\u2961','LeftDownVector':'\u21C3','LeftDownVectorBar':'\u2959','LeftFloor':'\u230A','leftharpoondown':'\u21BD','leftharpoonup':'\u21BC','leftleftarrows':'\u21C7','leftrightarrow':'\u2194','Leftrightarrow':'\u21D4','LeftRightArrow':'\u2194','leftrightarrows':'\u21C6','leftrightharpoons':'\u21CB','leftrightsquigarrow':'\u21AD','LeftRightVector':'\u294E','LeftTee':'\u22A3','LeftTeeArrow':'\u21A4','LeftTeeVector':'\u295A','leftthreetimes':'\u22CB','LeftTriangle':'\u22B2','LeftTriangleBar':'\u29CF','LeftTriangleEqual':'\u22B4','LeftUpDownVector':'\u2951','LeftUpTeeVector':'\u2960','LeftUpVector':'\u21BF','LeftUpVectorBar':'\u2958','LeftVector':'\u21BC','LeftVectorBar':'\u2952','leg':'\u22DA','lEg':'\u2A8B','leq':'\u2264','leqq':'\u2266','leqslant':'\u2A7D','les':'\u2A7D','lescc':'\u2AA8','lesdot':'\u2A7F','lesdoto':'\u2A81','lesdotor':'\u2A83','lesg':'\u22DA\uFE00','lesges':'\u2A93','lessapprox':'\u2A85','lessdot':'\u22D6','lesseqgtr':'\u22DA','lesseqqgtr':'\u2A8B','LessEqualGreater':'\u22DA','LessFullEqual':'\u2266','LessGreater':'\u2276','lessgtr':'\u2276','LessLess':'\u2AA1','lesssim':'\u2272','LessSlantEqual':'\u2A7D','LessTilde':'\u2272','lfisht':'\u297C','lfloor':'\u230A','lfr':'\uD835\uDD29','Lfr':'\uD835\uDD0F','lg':'\u2276','lgE':'\u2A91','lHar':'\u2962','lhard':'\u21BD','lharu':'\u21BC','lharul':'\u296A','lhblk':'\u2584','ljcy':'\u0459','LJcy':'\u0409','ll':'\u226A','Ll':'\u22D8','llarr':'\u21C7','llcorner':'\u231E','Lleftarrow':'\u21DA','llhard':'\u296B','lltri':'\u25FA','lmidot':'\u0140','Lmidot':'\u013F','lmoust':'\u23B0','lmoustache':'\u23B0','lnap':'\u2A89','lnapprox':'\u2A89','lne':'\u2A87','lnE':'\u2268','lneq':'\u2A87','lneqq':'\u2268','lnsim':'\u22E6','loang':'\u27EC','loarr':'\u21FD','lobrk':'\u27E6','longleftarrow':'\u27F5','Longleftarrow':'\u27F8','LongLeftArrow':'\u27F5','longleftrightarrow':'\u27F7','Longleftrightarrow':'\u27FA','LongLeftRightArrow':'\u27F7','longmapsto':'\u27FC','longrightarrow':'\u27F6','Longrightarrow':'\u27F9','LongRightArrow':'\u27F6','looparrowleft':'\u21AB','looparrowright':'\u21AC','lopar':'\u2985','lopf':'\uD835\uDD5D','Lopf':'\uD835\uDD43','loplus':'\u2A2D','lotimes':'\u2A34','lowast':'\u2217','lowbar':'_','LowerLeftArrow':'\u2199','LowerRightArrow':'\u2198','loz':'\u25CA','lozenge':'\u25CA','lozf':'\u29EB','lpar':'(','lparlt':'\u2993','lrarr':'\u21C6','lrcorner':'\u231F','lrhar':'\u21CB','lrhard':'\u296D','lrm':'\u200E','lrtri':'\u22BF','lsaquo':'\u2039','lscr':'\uD835\uDCC1','Lscr':'\u2112','lsh':'\u21B0','Lsh':'\u21B0','lsim':'\u2272','lsime':'\u2A8D','lsimg':'\u2A8F','lsqb':'[','lsquo':'\u2018','lsquor':'\u201A','lstrok':'\u0142','Lstrok':'\u0141','lt':'<','Lt':'\u226A','LT':'<','ltcc':'\u2AA6','ltcir':'\u2A79','ltdot':'\u22D6','lthree':'\u22CB','ltimes':'\u22C9','ltlarr':'\u2976','ltquest':'\u2A7B','ltri':'\u25C3','ltrie':'\u22B4','ltrif':'\u25C2','ltrPar':'\u2996','lurdshar':'\u294A','luruhar':'\u2966','lvertneqq':'\u2268\uFE00','lvnE':'\u2268\uFE00','macr':'\xAF','male':'\u2642','malt':'\u2720','maltese':'\u2720','map':'\u21A6','Map':'\u2905','mapsto':'\u21A6','mapstodown':'\u21A7','mapstoleft':'\u21A4','mapstoup':'\u21A5','marker':'\u25AE','mcomma':'\u2A29','mcy':'\u043C','Mcy':'\u041C','mdash':'\u2014','mDDot':'\u223A','measuredangle':'\u2221','MediumSpace':'\u205F','Mellintrf':'\u2133','mfr':'\uD835\uDD2A','Mfr':'\uD835\uDD10','mho':'\u2127','micro':'\xB5','mid':'\u2223','midast':'*','midcir':'\u2AF0','middot':'\xB7','minus':'\u2212','minusb':'\u229F','minusd':'\u2238','minusdu':'\u2A2A','MinusPlus':'\u2213','mlcp':'\u2ADB','mldr':'\u2026','mnplus':'\u2213','models':'\u22A7','mopf':'\uD835\uDD5E','Mopf':'\uD835\uDD44','mp':'\u2213','mscr':'\uD835\uDCC2','Mscr':'\u2133','mstpos':'\u223E','mu':'\u03BC','Mu':'\u039C','multimap':'\u22B8','mumap':'\u22B8','nabla':'\u2207','nacute':'\u0144','Nacute':'\u0143','nang':'\u2220\u20D2','nap':'\u2249','napE':'\u2A70\u0338','napid':'\u224B\u0338','napos':'\u0149','napprox':'\u2249','natur':'\u266E','natural':'\u266E','naturals':'\u2115','nbsp':'\xA0','nbump':'\u224E\u0338','nbumpe':'\u224F\u0338','ncap':'\u2A43','ncaron':'\u0148','Ncaron':'\u0147','ncedil':'\u0146','Ncedil':'\u0145','ncong':'\u2247','ncongdot':'\u2A6D\u0338','ncup':'\u2A42','ncy':'\u043D','Ncy':'\u041D','ndash':'\u2013','ne':'\u2260','nearhk':'\u2924','nearr':'\u2197','neArr':'\u21D7','nearrow':'\u2197','nedot':'\u2250\u0338','NegativeMediumSpace':'\u200B','NegativeThickSpace':'\u200B','NegativeThinSpace':'\u200B','NegativeVeryThinSpace':'\u200B','nequiv':'\u2262','nesear':'\u2928','nesim':'\u2242\u0338','NestedGreaterGreater':'\u226B','NestedLessLess':'\u226A','NewLine':'\n','nexist':'\u2204','nexists':'\u2204','nfr':'\uD835\uDD2B','Nfr':'\uD835\uDD11','nge':'\u2271','ngE':'\u2267\u0338','ngeq':'\u2271','ngeqq':'\u2267\u0338','ngeqslant':'\u2A7E\u0338','nges':'\u2A7E\u0338','nGg':'\u22D9\u0338','ngsim':'\u2275','ngt':'\u226F','nGt':'\u226B\u20D2','ngtr':'\u226F','nGtv':'\u226B\u0338','nharr':'\u21AE','nhArr':'\u21CE','nhpar':'\u2AF2','ni':'\u220B','nis':'\u22FC','nisd':'\u22FA','niv':'\u220B','njcy':'\u045A','NJcy':'\u040A','nlarr':'\u219A','nlArr':'\u21CD','nldr':'\u2025','nle':'\u2270','nlE':'\u2266\u0338','nleftarrow':'\u219A','nLeftarrow':'\u21CD','nleftrightarrow':'\u21AE','nLeftrightarrow':'\u21CE','nleq':'\u2270','nleqq':'\u2266\u0338','nleqslant':'\u2A7D\u0338','nles':'\u2A7D\u0338','nless':'\u226E','nLl':'\u22D8\u0338','nlsim':'\u2274','nlt':'\u226E','nLt':'\u226A\u20D2','nltri':'\u22EA','nltrie':'\u22EC','nLtv':'\u226A\u0338','nmid':'\u2224','NoBreak':'\u2060','NonBreakingSpace':'\xA0','nopf':'\uD835\uDD5F','Nopf':'\u2115','not':'\xAC','Not':'\u2AEC','NotCongruent':'\u2262','NotCupCap':'\u226D','NotDoubleVerticalBar':'\u2226','NotElement':'\u2209','NotEqual':'\u2260','NotEqualTilde':'\u2242\u0338','NotExists':'\u2204','NotGreater':'\u226F','NotGreaterEqual':'\u2271','NotGreaterFullEqual':'\u2267\u0338','NotGreaterGreater':'\u226B\u0338','NotGreaterLess':'\u2279','NotGreaterSlantEqual':'\u2A7E\u0338','NotGreaterTilde':'\u2275','NotHumpDownHump':'\u224E\u0338','NotHumpEqual':'\u224F\u0338','notin':'\u2209','notindot':'\u22F5\u0338','notinE':'\u22F9\u0338','notinva':'\u2209','notinvb':'\u22F7','notinvc':'\u22F6','NotLeftTriangle':'\u22EA','NotLeftTriangleBar':'\u29CF\u0338','NotLeftTriangleEqual':'\u22EC','NotLess':'\u226E','NotLessEqual':'\u2270','NotLessGreater':'\u2278','NotLessLess':'\u226A\u0338','NotLessSlantEqual':'\u2A7D\u0338','NotLessTilde':'\u2274','NotNestedGreaterGreater':'\u2AA2\u0338','NotNestedLessLess':'\u2AA1\u0338','notni':'\u220C','notniva':'\u220C','notnivb':'\u22FE','notnivc':'\u22FD','NotPrecedes':'\u2280','NotPrecedesEqual':'\u2AAF\u0338','NotPrecedesSlantEqual':'\u22E0','NotReverseElement':'\u220C','NotRightTriangle':'\u22EB','NotRightTriangleBar':'\u29D0\u0338','NotRightTriangleEqual':'\u22ED','NotSquareSubset':'\u228F\u0338','NotSquareSubsetEqual':'\u22E2','NotSquareSuperset':'\u2290\u0338','NotSquareSupersetEqual':'\u22E3','NotSubset':'\u2282\u20D2','NotSubsetEqual':'\u2288','NotSucceeds':'\u2281','NotSucceedsEqual':'\u2AB0\u0338','NotSucceedsSlantEqual':'\u22E1','NotSucceedsTilde':'\u227F\u0338','NotSuperset':'\u2283\u20D2','NotSupersetEqual':'\u2289','NotTilde':'\u2241','NotTildeEqual':'\u2244','NotTildeFullEqual':'\u2247','NotTildeTilde':'\u2249','NotVerticalBar':'\u2224','npar':'\u2226','nparallel':'\u2226','nparsl':'\u2AFD\u20E5','npart':'\u2202\u0338','npolint':'\u2A14','npr':'\u2280','nprcue':'\u22E0','npre':'\u2AAF\u0338','nprec':'\u2280','npreceq':'\u2AAF\u0338','nrarr':'\u219B','nrArr':'\u21CF','nrarrc':'\u2933\u0338','nrarrw':'\u219D\u0338','nrightarrow':'\u219B','nRightarrow':'\u21CF','nrtri':'\u22EB','nrtrie':'\u22ED','nsc':'\u2281','nsccue':'\u22E1','nsce':'\u2AB0\u0338','nscr':'\uD835\uDCC3','Nscr':'\uD835\uDCA9','nshortmid':'\u2224','nshortparallel':'\u2226','nsim':'\u2241','nsime':'\u2244','nsimeq':'\u2244','nsmid':'\u2224','nspar':'\u2226','nsqsube':'\u22E2','nsqsupe':'\u22E3','nsub':'\u2284','nsube':'\u2288','nsubE':'\u2AC5\u0338','nsubset':'\u2282\u20D2','nsubseteq':'\u2288','nsubseteqq':'\u2AC5\u0338','nsucc':'\u2281','nsucceq':'\u2AB0\u0338','nsup':'\u2285','nsupe':'\u2289','nsupE':'\u2AC6\u0338','nsupset':'\u2283\u20D2','nsupseteq':'\u2289','nsupseteqq':'\u2AC6\u0338','ntgl':'\u2279','ntilde':'\xF1','Ntilde':'\xD1','ntlg':'\u2278','ntriangleleft':'\u22EA','ntrianglelefteq':'\u22EC','ntriangleright':'\u22EB','ntrianglerighteq':'\u22ED','nu':'\u03BD','Nu':'\u039D','num':'#','numero':'\u2116','numsp':'\u2007','nvap':'\u224D\u20D2','nvdash':'\u22AC','nvDash':'\u22AD','nVdash':'\u22AE','nVDash':'\u22AF','nvge':'\u2265\u20D2','nvgt':'>\u20D2','nvHarr':'\u2904','nvinfin':'\u29DE','nvlArr':'\u2902','nvle':'\u2264\u20D2','nvlt':'<\u20D2','nvltrie':'\u22B4\u20D2','nvrArr':'\u2903','nvrtrie':'\u22B5\u20D2','nvsim':'\u223C\u20D2','nwarhk':'\u2923','nwarr':'\u2196','nwArr':'\u21D6','nwarrow':'\u2196','nwnear':'\u2927','oacute':'\xF3','Oacute':'\xD3','oast':'\u229B','ocir':'\u229A','ocirc':'\xF4','Ocirc':'\xD4','ocy':'\u043E','Ocy':'\u041E','odash':'\u229D','odblac':'\u0151','Odblac':'\u0150','odiv':'\u2A38','odot':'\u2299','odsold':'\u29BC','oelig':'\u0153','OElig':'\u0152','ofcir':'\u29BF','ofr':'\uD835\uDD2C','Ofr':'\uD835\uDD12','ogon':'\u02DB','ograve':'\xF2','Ograve':'\xD2','ogt':'\u29C1','ohbar':'\u29B5','ohm':'\u03A9','oint':'\u222E','olarr':'\u21BA','olcir':'\u29BE','olcross':'\u29BB','oline':'\u203E','olt':'\u29C0','omacr':'\u014D','Omacr':'\u014C','omega':'\u03C9','Omega':'\u03A9','omicron':'\u03BF','Omicron':'\u039F','omid':'\u29B6','ominus':'\u2296','oopf':'\uD835\uDD60','Oopf':'\uD835\uDD46','opar':'\u29B7','OpenCurlyDoubleQuote':'\u201C','OpenCurlyQuote':'\u2018','operp':'\u29B9','oplus':'\u2295','or':'\u2228','Or':'\u2A54','orarr':'\u21BB','ord':'\u2A5D','order':'\u2134','orderof':'\u2134','ordf':'\xAA','ordm':'\xBA','origof':'\u22B6','oror':'\u2A56','orslope':'\u2A57','orv':'\u2A5B','oS':'\u24C8','oscr':'\u2134','Oscr':'\uD835\uDCAA','oslash':'\xF8','Oslash':'\xD8','osol':'\u2298','otilde':'\xF5','Otilde':'\xD5','otimes':'\u2297','Otimes':'\u2A37','otimesas':'\u2A36','ouml':'\xF6','Ouml':'\xD6','ovbar':'\u233D','OverBar':'\u203E','OverBrace':'\u23DE','OverBracket':'\u23B4','OverParenthesis':'\u23DC','par':'\u2225','para':'\xB6','parallel':'\u2225','parsim':'\u2AF3','parsl':'\u2AFD','part':'\u2202','PartialD':'\u2202','pcy':'\u043F','Pcy':'\u041F','percnt':'%','period':'.','permil':'\u2030','perp':'\u22A5','pertenk':'\u2031','pfr':'\uD835\uDD2D','Pfr':'\uD835\uDD13','phi':'\u03C6','Phi':'\u03A6','phiv':'\u03D5','phmmat':'\u2133','phone':'\u260E','pi':'\u03C0','Pi':'\u03A0','pitchfork':'\u22D4','piv':'\u03D6','planck':'\u210F','planckh':'\u210E','plankv':'\u210F','plus':'+','plusacir':'\u2A23','plusb':'\u229E','pluscir':'\u2A22','plusdo':'\u2214','plusdu':'\u2A25','pluse':'\u2A72','PlusMinus':'\xB1','plusmn':'\xB1','plussim':'\u2A26','plustwo':'\u2A27','pm':'\xB1','Poincareplane':'\u210C','pointint':'\u2A15','popf':'\uD835\uDD61','Popf':'\u2119','pound':'\xA3','pr':'\u227A','Pr':'\u2ABB','prap':'\u2AB7','prcue':'\u227C','pre':'\u2AAF','prE':'\u2AB3','prec':'\u227A','precapprox':'\u2AB7','preccurlyeq':'\u227C','Precedes':'\u227A','PrecedesEqual':'\u2AAF','PrecedesSlantEqual':'\u227C','PrecedesTilde':'\u227E','preceq':'\u2AAF','precnapprox':'\u2AB9','precneqq':'\u2AB5','precnsim':'\u22E8','precsim':'\u227E','prime':'\u2032','Prime':'\u2033','primes':'\u2119','prnap':'\u2AB9','prnE':'\u2AB5','prnsim':'\u22E8','prod':'\u220F','Product':'\u220F','profalar':'\u232E','profline':'\u2312','profsurf':'\u2313','prop':'\u221D','Proportion':'\u2237','Proportional':'\u221D','propto':'\u221D','prsim':'\u227E','prurel':'\u22B0','pscr':'\uD835\uDCC5','Pscr':'\uD835\uDCAB','psi':'\u03C8','Psi':'\u03A8','puncsp':'\u2008','qfr':'\uD835\uDD2E','Qfr':'\uD835\uDD14','qint':'\u2A0C','qopf':'\uD835\uDD62','Qopf':'\u211A','qprime':'\u2057','qscr':'\uD835\uDCC6','Qscr':'\uD835\uDCAC','quaternions':'\u210D','quatint':'\u2A16','quest':'?','questeq':'\u225F','quot':'"','QUOT':'"','rAarr':'\u21DB','race':'\u223D\u0331','racute':'\u0155','Racute':'\u0154','radic':'\u221A','raemptyv':'\u29B3','rang':'\u27E9','Rang':'\u27EB','rangd':'\u2992','range':'\u29A5','rangle':'\u27E9','raquo':'\xBB','rarr':'\u2192','rArr':'\u21D2','Rarr':'\u21A0','rarrap':'\u2975','rarrb':'\u21E5','rarrbfs':'\u2920','rarrc':'\u2933','rarrfs':'\u291E','rarrhk':'\u21AA','rarrlp':'\u21AC','rarrpl':'\u2945','rarrsim':'\u2974','rarrtl':'\u21A3','Rarrtl':'\u2916','rarrw':'\u219D','ratail':'\u291A','rAtail':'\u291C','ratio':'\u2236','rationals':'\u211A','rbarr':'\u290D','rBarr':'\u290F','RBarr':'\u2910','rbbrk':'\u2773','rbrace':'}','rbrack':']','rbrke':'\u298C','rbrksld':'\u298E','rbrkslu':'\u2990','rcaron':'\u0159','Rcaron':'\u0158','rcedil':'\u0157','Rcedil':'\u0156','rceil':'\u2309','rcub':'}','rcy':'\u0440','Rcy':'\u0420','rdca':'\u2937','rdldhar':'\u2969','rdquo':'\u201D','rdquor':'\u201D','rdsh':'\u21B3','Re':'\u211C','real':'\u211C','realine':'\u211B','realpart':'\u211C','reals':'\u211D','rect':'\u25AD','reg':'\xAE','REG':'\xAE','ReverseElement':'\u220B','ReverseEquilibrium':'\u21CB','ReverseUpEquilibrium':'\u296F','rfisht':'\u297D','rfloor':'\u230B','rfr':'\uD835\uDD2F','Rfr':'\u211C','rHar':'\u2964','rhard':'\u21C1','rharu':'\u21C0','rharul':'\u296C','rho':'\u03C1','Rho':'\u03A1','rhov':'\u03F1','RightAngleBracket':'\u27E9','rightarrow':'\u2192','Rightarrow':'\u21D2','RightArrow':'\u2192','RightArrowBar':'\u21E5','RightArrowLeftArrow':'\u21C4','rightarrowtail':'\u21A3','RightCeiling':'\u2309','RightDoubleBracket':'\u27E7','RightDownTeeVector':'\u295D','RightDownVector':'\u21C2','RightDownVectorBar':'\u2955','RightFloor':'\u230B','rightharpoondown':'\u21C1','rightharpoonup':'\u21C0','rightleftarrows':'\u21C4','rightleftharpoons':'\u21CC','rightrightarrows':'\u21C9','rightsquigarrow':'\u219D','RightTee':'\u22A2','RightTeeArrow':'\u21A6','RightTeeVector':'\u295B','rightthreetimes':'\u22CC','RightTriangle':'\u22B3','RightTriangleBar':'\u29D0','RightTriangleEqual':'\u22B5','RightUpDownVector':'\u294F','RightUpTeeVector':'\u295C','RightUpVector':'\u21BE','RightUpVectorBar':'\u2954','RightVector':'\u21C0','RightVectorBar':'\u2953','ring':'\u02DA','risingdotseq':'\u2253','rlarr':'\u21C4','rlhar':'\u21CC','rlm':'\u200F','rmoust':'\u23B1','rmoustache':'\u23B1','rnmid':'\u2AEE','roang':'\u27ED','roarr':'\u21FE','robrk':'\u27E7','ropar':'\u2986','ropf':'\uD835\uDD63','Ropf':'\u211D','roplus':'\u2A2E','rotimes':'\u2A35','RoundImplies':'\u2970','rpar':')','rpargt':'\u2994','rppolint':'\u2A12','rrarr':'\u21C9','Rrightarrow':'\u21DB','rsaquo':'\u203A','rscr':'\uD835\uDCC7','Rscr':'\u211B','rsh':'\u21B1','Rsh':'\u21B1','rsqb':']','rsquo':'\u2019','rsquor':'\u2019','rthree':'\u22CC','rtimes':'\u22CA','rtri':'\u25B9','rtrie':'\u22B5','rtrif':'\u25B8','rtriltri':'\u29CE','RuleDelayed':'\u29F4','ruluhar':'\u2968','rx':'\u211E','sacute':'\u015B','Sacute':'\u015A','sbquo':'\u201A','sc':'\u227B','Sc':'\u2ABC','scap':'\u2AB8','scaron':'\u0161','Scaron':'\u0160','sccue':'\u227D','sce':'\u2AB0','scE':'\u2AB4','scedil':'\u015F','Scedil':'\u015E','scirc':'\u015D','Scirc':'\u015C','scnap':'\u2ABA','scnE':'\u2AB6','scnsim':'\u22E9','scpolint':'\u2A13','scsim':'\u227F','scy':'\u0441','Scy':'\u0421','sdot':'\u22C5','sdotb':'\u22A1','sdote':'\u2A66','searhk':'\u2925','searr':'\u2198','seArr':'\u21D8','searrow':'\u2198','sect':'\xA7','semi':';','seswar':'\u2929','setminus':'\u2216','setmn':'\u2216','sext':'\u2736','sfr':'\uD835\uDD30','Sfr':'\uD835\uDD16','sfrown':'\u2322','sharp':'\u266F','shchcy':'\u0449','SHCHcy':'\u0429','shcy':'\u0448','SHcy':'\u0428','ShortDownArrow':'\u2193','ShortLeftArrow':'\u2190','shortmid':'\u2223','shortparallel':'\u2225','ShortRightArrow':'\u2192','ShortUpArrow':'\u2191','shy':'\xAD','sigma':'\u03C3','Sigma':'\u03A3','sigmaf':'\u03C2','sigmav':'\u03C2','sim':'\u223C','simdot':'\u2A6A','sime':'\u2243','simeq':'\u2243','simg':'\u2A9E','simgE':'\u2AA0','siml':'\u2A9D','simlE':'\u2A9F','simne':'\u2246','simplus':'\u2A24','simrarr':'\u2972','slarr':'\u2190','SmallCircle':'\u2218','smallsetminus':'\u2216','smashp':'\u2A33','smeparsl':'\u29E4','smid':'\u2223','smile':'\u2323','smt':'\u2AAA','smte':'\u2AAC','smtes':'\u2AAC\uFE00','softcy':'\u044C','SOFTcy':'\u042C','sol':'/','solb':'\u29C4','solbar':'\u233F','sopf':'\uD835\uDD64','Sopf':'\uD835\uDD4A','spades':'\u2660','spadesuit':'\u2660','spar':'\u2225','sqcap':'\u2293','sqcaps':'\u2293\uFE00','sqcup':'\u2294','sqcups':'\u2294\uFE00','Sqrt':'\u221A','sqsub':'\u228F','sqsube':'\u2291','sqsubset':'\u228F','sqsubseteq':'\u2291','sqsup':'\u2290','sqsupe':'\u2292','sqsupset':'\u2290','sqsupseteq':'\u2292','squ':'\u25A1','square':'\u25A1','Square':'\u25A1','SquareIntersection':'\u2293','SquareSubset':'\u228F','SquareSubsetEqual':'\u2291','SquareSuperset':'\u2290','SquareSupersetEqual':'\u2292','SquareUnion':'\u2294','squarf':'\u25AA','squf':'\u25AA','srarr':'\u2192','sscr':'\uD835\uDCC8','Sscr':'\uD835\uDCAE','ssetmn':'\u2216','ssmile':'\u2323','sstarf':'\u22C6','star':'\u2606','Star':'\u22C6','starf':'\u2605','straightepsilon':'\u03F5','straightphi':'\u03D5','strns':'\xAF','sub':'\u2282','Sub':'\u22D0','subdot':'\u2ABD','sube':'\u2286','subE':'\u2AC5','subedot':'\u2AC3','submult':'\u2AC1','subne':'\u228A','subnE':'\u2ACB','subplus':'\u2ABF','subrarr':'\u2979','subset':'\u2282','Subset':'\u22D0','subseteq':'\u2286','subseteqq':'\u2AC5','SubsetEqual':'\u2286','subsetneq':'\u228A','subsetneqq':'\u2ACB','subsim':'\u2AC7','subsub':'\u2AD5','subsup':'\u2AD3','succ':'\u227B','succapprox':'\u2AB8','succcurlyeq':'\u227D','Succeeds':'\u227B','SucceedsEqual':'\u2AB0','SucceedsSlantEqual':'\u227D','SucceedsTilde':'\u227F','succeq':'\u2AB0','succnapprox':'\u2ABA','succneqq':'\u2AB6','succnsim':'\u22E9','succsim':'\u227F','SuchThat':'\u220B','sum':'\u2211','Sum':'\u2211','sung':'\u266A','sup':'\u2283','Sup':'\u22D1','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','supdot':'\u2ABE','supdsub':'\u2AD8','supe':'\u2287','supE':'\u2AC6','supedot':'\u2AC4','Superset':'\u2283','SupersetEqual':'\u2287','suphsol':'\u27C9','suphsub':'\u2AD7','suplarr':'\u297B','supmult':'\u2AC2','supne':'\u228B','supnE':'\u2ACC','supplus':'\u2AC0','supset':'\u2283','Supset':'\u22D1','supseteq':'\u2287','supseteqq':'\u2AC6','supsetneq':'\u228B','supsetneqq':'\u2ACC','supsim':'\u2AC8','supsub':'\u2AD4','supsup':'\u2AD6','swarhk':'\u2926','swarr':'\u2199','swArr':'\u21D9','swarrow':'\u2199','swnwar':'\u292A','szlig':'\xDF','Tab':'\t','target':'\u2316','tau':'\u03C4','Tau':'\u03A4','tbrk':'\u23B4','tcaron':'\u0165','Tcaron':'\u0164','tcedil':'\u0163','Tcedil':'\u0162','tcy':'\u0442','Tcy':'\u0422','tdot':'\u20DB','telrec':'\u2315','tfr':'\uD835\uDD31','Tfr':'\uD835\uDD17','there4':'\u2234','therefore':'\u2234','Therefore':'\u2234','theta':'\u03B8','Theta':'\u0398','thetasym':'\u03D1','thetav':'\u03D1','thickapprox':'\u2248','thicksim':'\u223C','ThickSpace':'\u205F\u200A','thinsp':'\u2009','ThinSpace':'\u2009','thkap':'\u2248','thksim':'\u223C','thorn':'\xFE','THORN':'\xDE','tilde':'\u02DC','Tilde':'\u223C','TildeEqual':'\u2243','TildeFullEqual':'\u2245','TildeTilde':'\u2248','times':'\xD7','timesb':'\u22A0','timesbar':'\u2A31','timesd':'\u2A30','tint':'\u222D','toea':'\u2928','top':'\u22A4','topbot':'\u2336','topcir':'\u2AF1','topf':'\uD835\uDD65','Topf':'\uD835\uDD4B','topfork':'\u2ADA','tosa':'\u2929','tprime':'\u2034','trade':'\u2122','TRADE':'\u2122','triangle':'\u25B5','triangledown':'\u25BF','triangleleft':'\u25C3','trianglelefteq':'\u22B4','triangleq':'\u225C','triangleright':'\u25B9','trianglerighteq':'\u22B5','tridot':'\u25EC','trie':'\u225C','triminus':'\u2A3A','TripleDot':'\u20DB','triplus':'\u2A39','trisb':'\u29CD','tritime':'\u2A3B','trpezium':'\u23E2','tscr':'\uD835\uDCC9','Tscr':'\uD835\uDCAF','tscy':'\u0446','TScy':'\u0426','tshcy':'\u045B','TSHcy':'\u040B','tstrok':'\u0167','Tstrok':'\u0166','twixt':'\u226C','twoheadleftarrow':'\u219E','twoheadrightarrow':'\u21A0','uacute':'\xFA','Uacute':'\xDA','uarr':'\u2191','uArr':'\u21D1','Uarr':'\u219F','Uarrocir':'\u2949','ubrcy':'\u045E','Ubrcy':'\u040E','ubreve':'\u016D','Ubreve':'\u016C','ucirc':'\xFB','Ucirc':'\xDB','ucy':'\u0443','Ucy':'\u0423','udarr':'\u21C5','udblac':'\u0171','Udblac':'\u0170','udhar':'\u296E','ufisht':'\u297E','ufr':'\uD835\uDD32','Ufr':'\uD835\uDD18','ugrave':'\xF9','Ugrave':'\xD9','uHar':'\u2963','uharl':'\u21BF','uharr':'\u21BE','uhblk':'\u2580','ulcorn':'\u231C','ulcorner':'\u231C','ulcrop':'\u230F','ultri':'\u25F8','umacr':'\u016B','Umacr':'\u016A','uml':'\xA8','UnderBar':'_','UnderBrace':'\u23DF','UnderBracket':'\u23B5','UnderParenthesis':'\u23DD','Union':'\u22C3','UnionPlus':'\u228E','uogon':'\u0173','Uogon':'\u0172','uopf':'\uD835\uDD66','Uopf':'\uD835\uDD4C','uparrow':'\u2191','Uparrow':'\u21D1','UpArrow':'\u2191','UpArrowBar':'\u2912','UpArrowDownArrow':'\u21C5','updownarrow':'\u2195','Updownarrow':'\u21D5','UpDownArrow':'\u2195','UpEquilibrium':'\u296E','upharpoonleft':'\u21BF','upharpoonright':'\u21BE','uplus':'\u228E','UpperLeftArrow':'\u2196','UpperRightArrow':'\u2197','upsi':'\u03C5','Upsi':'\u03D2','upsih':'\u03D2','upsilon':'\u03C5','Upsilon':'\u03A5','UpTee':'\u22A5','UpTeeArrow':'\u21A5','upuparrows':'\u21C8','urcorn':'\u231D','urcorner':'\u231D','urcrop':'\u230E','uring':'\u016F','Uring':'\u016E','urtri':'\u25F9','uscr':'\uD835\uDCCA','Uscr':'\uD835\uDCB0','utdot':'\u22F0','utilde':'\u0169','Utilde':'\u0168','utri':'\u25B5','utrif':'\u25B4','uuarr':'\u21C8','uuml':'\xFC','Uuml':'\xDC','uwangle':'\u29A7','vangrt':'\u299C','varepsilon':'\u03F5','varkappa':'\u03F0','varnothing':'\u2205','varphi':'\u03D5','varpi':'\u03D6','varpropto':'\u221D','varr':'\u2195','vArr':'\u21D5','varrho':'\u03F1','varsigma':'\u03C2','varsubsetneq':'\u228A\uFE00','varsubsetneqq':'\u2ACB\uFE00','varsupsetneq':'\u228B\uFE00','varsupsetneqq':'\u2ACC\uFE00','vartheta':'\u03D1','vartriangleleft':'\u22B2','vartriangleright':'\u22B3','vBar':'\u2AE8','Vbar':'\u2AEB','vBarv':'\u2AE9','vcy':'\u0432','Vcy':'\u0412','vdash':'\u22A2','vDash':'\u22A8','Vdash':'\u22A9','VDash':'\u22AB','Vdashl':'\u2AE6','vee':'\u2228','Vee':'\u22C1','veebar':'\u22BB','veeeq':'\u225A','vellip':'\u22EE','verbar':'|','Verbar':'\u2016','vert':'|','Vert':'\u2016','VerticalBar':'\u2223','VerticalLine':'|','VerticalSeparator':'\u2758','VerticalTilde':'\u2240','VeryThinSpace':'\u200A','vfr':'\uD835\uDD33','Vfr':'\uD835\uDD19','vltri':'\u22B2','vnsub':'\u2282\u20D2','vnsup':'\u2283\u20D2','vopf':'\uD835\uDD67','Vopf':'\uD835\uDD4D','vprop':'\u221D','vrtri':'\u22B3','vscr':'\uD835\uDCCB','Vscr':'\uD835\uDCB1','vsubne':'\u228A\uFE00','vsubnE':'\u2ACB\uFE00','vsupne':'\u228B\uFE00','vsupnE':'\u2ACC\uFE00','Vvdash':'\u22AA','vzigzag':'\u299A','wcirc':'\u0175','Wcirc':'\u0174','wedbar':'\u2A5F','wedge':'\u2227','Wedge':'\u22C0','wedgeq':'\u2259','weierp':'\u2118','wfr':'\uD835\uDD34','Wfr':'\uD835\uDD1A','wopf':'\uD835\uDD68','Wopf':'\uD835\uDD4E','wp':'\u2118','wr':'\u2240','wreath':'\u2240','wscr':'\uD835\uDCCC','Wscr':'\uD835\uDCB2','xcap':'\u22C2','xcirc':'\u25EF','xcup':'\u22C3','xdtri':'\u25BD','xfr':'\uD835\uDD35','Xfr':'\uD835\uDD1B','xharr':'\u27F7','xhArr':'\u27FA','xi':'\u03BE','Xi':'\u039E','xlarr':'\u27F5','xlArr':'\u27F8','xmap':'\u27FC','xnis':'\u22FB','xodot':'\u2A00','xopf':'\uD835\uDD69','Xopf':'\uD835\uDD4F','xoplus':'\u2A01','xotime':'\u2A02','xrarr':'\u27F6','xrArr':'\u27F9','xscr':'\uD835\uDCCD','Xscr':'\uD835\uDCB3','xsqcup':'\u2A06','xuplus':'\u2A04','xutri':'\u25B3','xvee':'\u22C1','xwedge':'\u22C0','yacute':'\xFD','Yacute':'\xDD','yacy':'\u044F','YAcy':'\u042F','ycirc':'\u0177','Ycirc':'\u0176','ycy':'\u044B','Ycy':'\u042B','yen':'\xA5','yfr':'\uD835\uDD36','Yfr':'\uD835\uDD1C','yicy':'\u0457','YIcy':'\u0407','yopf':'\uD835\uDD6A','Yopf':'\uD835\uDD50','yscr':'\uD835\uDCCE','Yscr':'\uD835\uDCB4','yucy':'\u044E','YUcy':'\u042E','yuml':'\xFF','Yuml':'\u0178','zacute':'\u017A','Zacute':'\u0179','zcaron':'\u017E','Zcaron':'\u017D','zcy':'\u0437','Zcy':'\u0417','zdot':'\u017C','Zdot':'\u017B','zeetrf':'\u2128','ZeroWidthSpace':'\u200B','zeta':'\u03B6','Zeta':'\u0396','zfr':'\uD835\uDD37','Zfr':'\u2128','zhcy':'\u0436','ZHcy':'\u0416','zigrarr':'\u21DD','zopf':'\uD835\uDD6B','Zopf':'\u2124','zscr':'\uD835\uDCCF','Zscr':'\uD835\uDCB5','zwj':'\u200D','zwnj':'\u200C'};
+  	var decodeMapLegacy = {'aacute':'\xE1','Aacute':'\xC1','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','aelig':'\xE6','AElig':'\xC6','agrave':'\xE0','Agrave':'\xC0','amp':'&','AMP':'&','aring':'\xE5','Aring':'\xC5','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','brvbar':'\xA6','ccedil':'\xE7','Ccedil':'\xC7','cedil':'\xB8','cent':'\xA2','copy':'\xA9','COPY':'\xA9','curren':'\xA4','deg':'\xB0','divide':'\xF7','eacute':'\xE9','Eacute':'\xC9','ecirc':'\xEA','Ecirc':'\xCA','egrave':'\xE8','Egrave':'\xC8','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','frac12':'\xBD','frac14':'\xBC','frac34':'\xBE','gt':'>','GT':'>','iacute':'\xED','Iacute':'\xCD','icirc':'\xEE','Icirc':'\xCE','iexcl':'\xA1','igrave':'\xEC','Igrave':'\xCC','iquest':'\xBF','iuml':'\xEF','Iuml':'\xCF','laquo':'\xAB','lt':'<','LT':'<','macr':'\xAF','micro':'\xB5','middot':'\xB7','nbsp':'\xA0','not':'\xAC','ntilde':'\xF1','Ntilde':'\xD1','oacute':'\xF3','Oacute':'\xD3','ocirc':'\xF4','Ocirc':'\xD4','ograve':'\xF2','Ograve':'\xD2','ordf':'\xAA','ordm':'\xBA','oslash':'\xF8','Oslash':'\xD8','otilde':'\xF5','Otilde':'\xD5','ouml':'\xF6','Ouml':'\xD6','para':'\xB6','plusmn':'\xB1','pound':'\xA3','quot':'"','QUOT':'"','raquo':'\xBB','reg':'\xAE','REG':'\xAE','sect':'\xA7','shy':'\xAD','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','szlig':'\xDF','thorn':'\xFE','THORN':'\xDE','times':'\xD7','uacute':'\xFA','Uacute':'\xDA','ucirc':'\xFB','Ucirc':'\xDB','ugrave':'\xF9','Ugrave':'\xD9','uml':'\xA8','uuml':'\xFC','Uuml':'\xDC','yacute':'\xFD','Yacute':'\xDD','yen':'\xA5','yuml':'\xFF'};
+  	var decodeMapNumeric = {'0':'\uFFFD','128':'\u20AC','130':'\u201A','131':'\u0192','132':'\u201E','133':'\u2026','134':'\u2020','135':'\u2021','136':'\u02C6','137':'\u2030','138':'\u0160','139':'\u2039','140':'\u0152','142':'\u017D','145':'\u2018','146':'\u2019','147':'\u201C','148':'\u201D','149':'\u2022','150':'\u2013','151':'\u2014','152':'\u02DC','153':'\u2122','154':'\u0161','155':'\u203A','156':'\u0153','158':'\u017E','159':'\u0178'};
+  	var invalidReferenceCodePoints = [1,2,3,4,5,6,7,8,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,64976,64977,64978,64979,64980,64981,64982,64983,64984,64985,64986,64987,64988,64989,64990,64991,64992,64993,64994,64995,64996,64997,64998,64999,65000,65001,65002,65003,65004,65005,65006,65007,65534,65535,131070,131071,196606,196607,262142,262143,327678,327679,393214,393215,458750,458751,524286,524287,589822,589823,655358,655359,720894,720895,786430,786431,851966,851967,917502,917503,983038,983039,1048574,1048575,1114110,1114111];
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var stringFromCharCode = String.fromCharCode;
+
+  	var object = {};
+  	var hasOwnProperty = object.hasOwnProperty;
+  	var has = function(object, propertyName) {
+  		return hasOwnProperty.call(object, propertyName);
+  	};
+
+  	var contains = function(array, value) {
+  		var index = -1;
+  		var length = array.length;
+  		while (++index < length) {
+  			if (array[index] == value) {
+  				return true;
+  			}
+  		}
+  		return false;
+  	};
+
+  	var merge = function(options, defaults) {
+  		if (!options) {
+  			return defaults;
+  		}
+  		var result = {};
+  		var key;
+  		for (key in defaults) {
+  			// A `hasOwnProperty` check is not needed here, since only recognized
+  			// option names are used anyway. Any others are ignored.
+  			result[key] = has(options, key) ? options[key] : defaults[key];
+  		}
+  		return result;
+  	};
+
+  	// Modified version of `ucs2encode`; see https://mths.be/punycode.
+  	var codePointToSymbol = function(codePoint, strict) {
+  		var output = '';
+  		if ((codePoint >= 0xD800 && codePoint <= 0xDFFF) || codePoint > 0x10FFFF) {
+  			// See issue #4:
+  			// “Otherwise, if the number is in the range 0xD800 to 0xDFFF or is
+  			// greater than 0x10FFFF, then this is a parse error. Return a U+FFFD
+  			// REPLACEMENT CHARACTER.”
+  			if (strict) {
+  				parseError('character reference outside the permissible Unicode range');
+  			}
+  			return '\uFFFD';
+  		}
+  		if (has(decodeMapNumeric, codePoint)) {
+  			if (strict) {
+  				parseError('disallowed character reference');
+  			}
+  			return decodeMapNumeric[codePoint];
+  		}
+  		if (strict && contains(invalidReferenceCodePoints, codePoint)) {
+  			parseError('disallowed character reference');
+  		}
+  		if (codePoint > 0xFFFF) {
+  			codePoint -= 0x10000;
+  			output += stringFromCharCode(codePoint >>> 10 & 0x3FF | 0xD800);
+  			codePoint = 0xDC00 | codePoint & 0x3FF;
+  		}
+  		output += stringFromCharCode(codePoint);
+  		return output;
+  	};
+
+  	var hexEscape = function(codePoint) {
+  		return '&#x' + codePoint.toString(16).toUpperCase() + ';';
+  	};
+
+  	var decEscape = function(codePoint) {
+  		return '&#' + codePoint + ';';
+  	};
+
+  	var parseError = function(message) {
+  		throw Error('Parse error: ' + message);
+  	};
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var encode = function(string, options) {
+  		options = merge(options, encode.options);
+  		var strict = options.strict;
+  		if (strict && regexInvalidRawCodePoint.test(string)) {
+  			parseError('forbidden code point');
+  		}
+  		var encodeEverything = options.encodeEverything;
+  		var useNamedReferences = options.useNamedReferences;
+  		var allowUnsafeSymbols = options.allowUnsafeSymbols;
+  		var escapeCodePoint = options.decimal ? decEscape : hexEscape;
+
+  		var escapeBmpSymbol = function(symbol) {
+  			return escapeCodePoint(symbol.charCodeAt(0));
+  		};
+
+  		if (encodeEverything) {
+  			// Encode ASCII symbols.
+  			string = string.replace(regexAsciiWhitelist, function(symbol) {
+  				// Use named references if requested & possible.
+  				if (useNamedReferences && has(encodeMap, symbol)) {
+  					return '&' + encodeMap[symbol] + ';';
+  				}
+  				return escapeBmpSymbol(symbol);
+  			});
+  			// Shorten a few escapes that represent two symbols, of which at least one
+  			// is within the ASCII range.
+  			if (useNamedReferences) {
+  				string = string
+  					.replace(/&gt;\u20D2/g, '&nvgt;')
+  					.replace(/&lt;\u20D2/g, '&nvlt;')
+  					.replace(/&#x66;&#x6A;/g, '&fjlig;');
+  			}
+  			// Encode non-ASCII symbols.
+  			if (useNamedReferences) {
+  				// Encode non-ASCII symbols that can be replaced with a named reference.
+  				string = string.replace(regexEncodeNonAscii, function(string) {
+  					// Note: there is no need to check `has(encodeMap, string)` here.
+  					return '&' + encodeMap[string] + ';';
+  				});
+  			}
+  			// Note: any remaining non-ASCII symbols are handled outside of the `if`.
+  		} else if (useNamedReferences) {
+  			// Apply named character references.
+  			// Encode `<>"'&` using named character references.
+  			if (!allowUnsafeSymbols) {
+  				string = string.replace(regexEscape, function(string) {
+  					return '&' + encodeMap[string] + ';'; // no need to check `has()` here
+  				});
+  			}
+  			// Shorten escapes that represent two symbols, of which at least one is
+  			// `<>"'&`.
+  			string = string
+  				.replace(/&gt;\u20D2/g, '&nvgt;')
+  				.replace(/&lt;\u20D2/g, '&nvlt;');
+  			// Encode non-ASCII symbols that can be replaced with a named reference.
+  			string = string.replace(regexEncodeNonAscii, function(string) {
+  				// Note: there is no need to check `has(encodeMap, string)` here.
+  				return '&' + encodeMap[string] + ';';
+  			});
+  		} else if (!allowUnsafeSymbols) {
+  			// Encode `<>"'&` using hexadecimal escapes, now that they’re not handled
+  			// using named character references.
+  			string = string.replace(regexEscape, escapeBmpSymbol);
+  		}
+  		return string
+  			// Encode astral symbols.
+  			.replace(regexAstralSymbols, function($0) {
+  				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+  				var high = $0.charCodeAt(0);
+  				var low = $0.charCodeAt(1);
+  				var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
+  				return escapeCodePoint(codePoint);
+  			})
+  			// Encode any remaining BMP symbols that are not printable ASCII symbols
+  			// using a hexadecimal escape.
+  			.replace(regexBmpWhitelist, escapeBmpSymbol);
+  	};
+  	// Expose default options (so they can be overridden globally).
+  	encode.options = {
+  		'allowUnsafeSymbols': false,
+  		'encodeEverything': false,
+  		'strict': false,
+  		'useNamedReferences': false,
+  		'decimal' : false
+  	};
+
+  	var decode = function(html, options) {
+  		options = merge(options, decode.options);
+  		var strict = options.strict;
+  		if (strict && regexInvalidEntity.test(html)) {
+  			parseError('malformed character reference');
+  		}
+  		return html.replace(regexDecode, function($0, $1, $2, $3, $4, $5, $6, $7, $8) {
+  			var codePoint;
+  			var semicolon;
+  			var decDigits;
+  			var hexDigits;
+  			var reference;
+  			var next;
+
+  			if ($1) {
+  				reference = $1;
+  				// Note: there is no need to check `has(decodeMap, reference)`.
+  				return decodeMap[reference];
+  			}
+
+  			if ($2) {
+  				// Decode named character references without trailing `;`, e.g. `&amp`.
+  				// This is only a parse error if it gets converted to `&`, or if it is
+  				// followed by `=` in an attribute context.
+  				reference = $2;
+  				next = $3;
+  				if (next && options.isAttributeValue) {
+  					if (strict && next == '=') {
+  						parseError('`&` did not start a character reference');
+  					}
+  					return $0;
+  				} else {
+  					if (strict) {
+  						parseError(
+  							'named character reference was not terminated by a semicolon'
+  						);
+  					}
+  					// Note: there is no need to check `has(decodeMapLegacy, reference)`.
+  					return decodeMapLegacy[reference] + (next || '');
+  				}
+  			}
+
+  			if ($4) {
+  				// Decode decimal escapes, e.g. `&#119558;`.
+  				decDigits = $4;
+  				semicolon = $5;
+  				if (strict && !semicolon) {
+  					parseError('character reference was not terminated by a semicolon');
+  				}
+  				codePoint = parseInt(decDigits, 10);
+  				return codePointToSymbol(codePoint, strict);
+  			}
+
+  			if ($6) {
+  				// Decode hexadecimal escapes, e.g. `&#x1D306;`.
+  				hexDigits = $6;
+  				semicolon = $7;
+  				if (strict && !semicolon) {
+  					parseError('character reference was not terminated by a semicolon');
+  				}
+  				codePoint = parseInt(hexDigits, 16);
+  				return codePointToSymbol(codePoint, strict);
+  			}
+
+  			// If we’re still here, `if ($7)` is implied; it’s an ambiguous
+  			// ampersand for sure. https://mths.be/notes/ambiguous-ampersands
+  			if (strict) {
+  				parseError(
+  					'named character reference was not terminated by a semicolon'
+  				);
+  			}
+  			return $0;
+  		});
+  	};
+  	// Expose default options (so they can be overridden globally).
+  	decode.options = {
+  		'isAttributeValue': false,
+  		'strict': false
+  	};
+
+  	var escape = function(string) {
+  		return string.replace(regexEscape, function($0) {
+  			// Note: there is no need to check `has(escapeMap, $0)` here.
+  			return escapeMap[$0];
+  		});
+  	};
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var he = {
+  		'version': '1.2.0',
+  		'encode': encode,
+  		'decode': decode,
+  		'escape': escape,
+  		'unescape': decode
+  	};
+
+  	// Some AMD build optimizers, like r.js, check for specific condition patterns
+  	// like the following:
+  	if (freeExports && !freeExports.nodeType) {
+  		if (freeModule) { // in Node.js, io.js, or RingoJS v0.8.0+
+  			freeModule.exports = he;
+  		} else { // in Narwhal or RingoJS v0.7.0-
+  			for (var key in he) {
+  				has(he, key) && (freeExports[key] = he[key]);
+  			}
+  		}
+  	} else { // in Rhino or a web browser
+  		root.he = he;
+  	}
+
+  }(commonjsGlobal));
+  });
+
+  /**
+   * Not type-checking this file because it's mostly vendor code.
+   */
+
+  // Regular Expressions for parsing tags and attributes
+  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+  var startTagOpen = new RegExp(("^<" + qnameCapture));
+  var startTagClose = /^\s*(\/?)>/;
+  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+  var doctype = /^<!DOCTYPE [^>]+>/i;
+  // #7298: escape - to avoid being passed as HTML comment when inlined in page
+  var comment = /^<!\--/;
+  var conditionalComment = /^<!\[/;
+
+  // Special Elements (can contain anything)
+  var isPlainTextElement = makeMap('script,style,textarea', true);
+  var reCache = {};
+
+  var decodingMap = {
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&amp;': '&',
+    '&#10;': '\n',
+    '&#9;': '\t',
+    '&#39;': "'"
+  };
+  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+  // #5992
+  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+  function decodeAttr (value, shouldDecodeNewlines) {
+    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+    return value.replace(re, function (match) { return decodingMap[match]; })
+  }
+
+  function parseHTML (html, options) {
+    var stack = [];
+    var expectHTML = options.expectHTML;
+    var isUnaryTag$$1 = options.isUnaryTag || no;
+    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+    var index = 0;
+    var last, lastTag;
+    while (html) {
+      last = html;
+      // Make sure we're not in a plaintext content element like script/style
+      if (!lastTag || !isPlainTextElement(lastTag)) {
+        var textEnd = html.indexOf('<');
+        if (textEnd === 0) {
+          // Comment:
+          if (comment.test(html)) {
+            var commentEnd = html.indexOf('-->');
+
+            if (commentEnd >= 0) {
+              if (options.shouldKeepComment) {
+                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+              }
+              advance(commentEnd + 3);
+              continue
+            }
+          }
+
+          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+          if (conditionalComment.test(html)) {
+            var conditionalEnd = html.indexOf(']>');
+
+            if (conditionalEnd >= 0) {
+              advance(conditionalEnd + 2);
+              continue
+            }
+          }
+
+          // Doctype:
+          var doctypeMatch = html.match(doctype);
+          if (doctypeMatch) {
+            advance(doctypeMatch[0].length);
+            continue
+          }
+
+          // End tag:
+          var endTagMatch = html.match(endTag);
+          if (endTagMatch) {
+            var curIndex = index;
+            advance(endTagMatch[0].length);
+            parseEndTag(endTagMatch[1], curIndex, index);
+            continue
+          }
+
+          // Start tag:
+          var startTagMatch = parseStartTag();
+          if (startTagMatch) {
+            handleStartTag(startTagMatch);
+            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+              advance(1);
+            }
+            continue
+          }
+        }
+
+        var text = (void 0), rest = (void 0), next = (void 0);
+        if (textEnd >= 0) {
+          rest = html.slice(textEnd);
+          while (
+            !endTag.test(rest) &&
+            !startTagOpen.test(rest) &&
+            !comment.test(rest) &&
+            !conditionalComment.test(rest)
+          ) {
+            // < in plain text, be forgiving and treat it as text
+            next = rest.indexOf('<', 1);
+            if (next < 0) { break }
+            textEnd += next;
+            rest = html.slice(textEnd);
+          }
+          text = html.substring(0, textEnd);
+        }
+
+        if (textEnd < 0) {
+          text = html;
+        }
+
+        if (text) {
+          advance(text.length);
+        }
+
+        if (options.chars && text) {
+          options.chars(text, index - text.length, index);
+        }
+      } else {
+        var endTagLength = 0;
+        var stackedTag = lastTag.toLowerCase();
+        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+          endTagLength = endTag.length;
+          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+            text = text
+              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+          }
+          if (shouldIgnoreFirstNewline(stackedTag, text)) {
+            text = text.slice(1);
+          }
+          if (options.chars) {
+            options.chars(text);
+          }
+          return ''
+        });
+        index += html.length - rest$1.length;
+        html = rest$1;
+        parseEndTag(stackedTag, index - endTagLength, index);
+      }
+
+      if (html === last) {
+        options.chars && options.chars(html);
+        if (!stack.length && options.warn) {
+          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
+        }
+        break
+      }
+    }
+
+    // Clean up any remaining tags
+    parseEndTag();
+
+    function advance (n) {
+      index += n;
+      html = html.substring(n);
+    }
+
+    function parseStartTag () {
+      var start = html.match(startTagOpen);
+      if (start) {
+        var match = {
+          tagName: start[1],
+          attrs: [],
+          start: index
+        };
+        advance(start[0].length);
+        var end, attr;
+        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+          attr.start = index;
+          advance(attr[0].length);
+          attr.end = index;
+          match.attrs.push(attr);
+        }
+        if (end) {
+          match.unarySlash = end[1];
+          advance(end[0].length);
+          match.end = index;
+          return match
+        }
+      }
+    }
+
+    function handleStartTag (match) {
+      var tagName = match.tagName;
+      var unarySlash = match.unarySlash;
+
+      if (expectHTML) {
+        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+          parseEndTag(lastTag);
+        }
+        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+          parseEndTag(tagName);
+        }
+      }
+
+      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+      var l = match.attrs.length;
+      var attrs = new Array(l);
+      for (var i = 0; i < l; i++) {
+        var args = match.attrs[i];
+        var value = args[3] || args[4] || args[5] || '';
+        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+          ? options.shouldDecodeNewlinesForHref
+          : options.shouldDecodeNewlines;
+        attrs[i] = {
+          name: args[1],
+          value: decodeAttr(value, shouldDecodeNewlines)
+        };
+        if (options.outputSourceRange) {
+          attrs[i].start = args.start + args[0].match(/^\s*/).length;
+          attrs[i].end = args.end;
+        }
+      }
+
+      if (!unary) {
+        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+        lastTag = tagName;
+      }
+
+      if (options.start) {
+        options.start(tagName, attrs, unary, match.start, match.end);
+      }
+    }
+
+    function parseEndTag (tagName, start, end) {
+      var pos, lowerCasedTagName;
+      if (start == null) { start = index; }
+      if (end == null) { end = index; }
+
+      // Find the closest opened tag of the same type
+      if (tagName) {
+        lowerCasedTagName = tagName.toLowerCase();
+        for (pos = stack.length - 1; pos >= 0; pos--) {
+          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+            break
+          }
+        }
+      } else {
+        // If no tag name is provided, clean shop
+        pos = 0;
+      }
+
+      if (pos >= 0) {
+        // Close all the open elements, up the stack
+        for (var i = stack.length - 1; i >= pos; i--) {
+          if (i > pos || !tagName &&
+            options.warn
+          ) {
+            options.warn(
+              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+              { start: stack[i].start, end: stack[i].end }
+            );
+          }
+          if (options.end) {
+            options.end(stack[i].tag, start, end);
+          }
+        }
+
+        // Remove the open elements from the stack
+        stack.length = pos;
+        lastTag = pos && stack[pos - 1].tag;
+      } else if (lowerCasedTagName === 'br') {
+        if (options.start) {
+          options.start(tagName, [], true, start, end);
+        }
+      } else if (lowerCasedTagName === 'p') {
+        if (options.start) {
+          options.start(tagName, [], false, start, end);
+        }
+        if (options.end) {
+          options.end(tagName, start, end);
+        }
+      }
+    }
+  }
+
+  /*  */
+
+  /**
+   * Cross-platform code generation for component v-model
+   */
+  function genComponentModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var ref = modifiers || {};
+    var number = ref.number;
+    var trim = ref.trim;
+
+    var baseValueExpression = '$$v';
+    var valueExpression = baseValueExpression;
+    if (trim) {
+      valueExpression =
+        "(typeof " + baseValueExpression + " === 'string'" +
+        "? " + baseValueExpression + ".trim()" +
+        ": " + baseValueExpression + ")";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+    var assignment = genAssignmentCode(value, valueExpression);
+
+    el.model = {
+      value: ("(" + value + ")"),
+      expression: JSON.stringify(value),
+      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+    };
+  }
+
+  /**
+   * Cross-platform codegen helper for generating v-model value assignment code.
+   */
+  function genAssignmentCode (
+    value,
+    assignment
+  ) {
+    var res = parseModel(value);
+    if (res.key === null) {
+      return (value + "=" + assignment)
+    } else {
+      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
+    }
+  }
+
+  /**
+   * Parse a v-model expression into a base path and a final key segment.
+   * Handles both dot-path and possible square brackets.
+   *
+   * Possible cases:
+   *
+   * - test
+   * - test[key]
+   * - test[test1[key]]
+   * - test["a"][key]
+   * - xxx.test[a[a].test1[key]]
+   * - test.xxx.a["asa"][test1[key]]
+   *
+   */
+
+  var len, str, chr, index, expressionPos, expressionEndPos;
+
+
+
+  function parseModel (val) {
+    // Fix https://github.com/vuejs/vue/pull/7730
+    // allow v-model="obj.val " (trailing whitespace)
+    val = val.trim();
+    len = val.length;
+
+    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+      index = val.lastIndexOf('.');
+      if (index > -1) {
+        return {
+          exp: val.slice(0, index),
+          key: '"' + val.slice(index + 1) + '"'
+        }
+      } else {
+        return {
+          exp: val,
+          key: null
+        }
+      }
+    }
+
+    str = val;
+    index = expressionPos = expressionEndPos = 0;
+
+    while (!eof()) {
+      chr = next();
+      /* istanbul ignore if */
+      if (isStringStart(chr)) {
+        parseString(chr);
+      } else if (chr === 0x5B) {
+        parseBracket(chr);
+      }
+    }
+
+    return {
+      exp: val.slice(0, expressionPos),
+      key: val.slice(expressionPos + 1, expressionEndPos)
+    }
+  }
+
+  function next () {
+    return str.charCodeAt(++index)
+  }
+
+  function eof () {
+    return index >= len
+  }
+
+  function isStringStart (chr) {
+    return chr === 0x22 || chr === 0x27
+  }
+
+  function parseBracket (chr) {
+    var inBracket = 1;
+    expressionPos = index;
+    while (!eof()) {
+      chr = next();
+      if (isStringStart(chr)) {
+        parseString(chr);
+        continue
+      }
+      if (chr === 0x5B) { inBracket++; }
+      if (chr === 0x5D) { inBracket--; }
+      if (inBracket === 0) {
+        expressionEndPos = index;
+        break
+      }
+    }
+  }
+
+  function parseString (chr) {
+    var stringQuote = chr;
+    while (!eof()) {
+      chr = next();
+      if (chr === stringQuote) {
+        break
+      }
+    }
+  }
+
+  /*  */
+
+  var onRE = /^@|^v-on:/;
+  var dirRE = /^v-|^@|^:|^#/;
+  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+  var stripParensRE = /^\(|\)$/g;
+  var dynamicArgRE = /^\[.*\]$/;
+
+  var argRE = /:(.*)$/;
+  var bindRE = /^:|^\.|^v-bind:/;
+  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+  var slotRE = /^v-slot(:|$)|^#/;
+
+  var lineBreakRE = /[\r\n]/;
+  var whitespaceRE = /[ \f\t\r\n]+/g;
+
+  var invalidAttributeRE = /[\s"'<>\/=]/;
+
+  var decodeHTMLCached = cached(he.decode);
+
+  var emptySlotScopeToken = "_empty_";
+
+  // configurable state
+  var warn$1;
+  var delimiters;
+  var transforms;
+  var preTransforms;
+  var postTransforms;
+  var platformIsPreTag;
+  var platformMustUseProp;
+  var platformGetTagNamespace;
+  var maybeComponent;
+
+  function createASTElement (
+    tag,
+    attrs,
+    parent
+  ) {
+    return {
+      type: 1,
+      tag: tag,
+      attrsList: attrs,
+      attrsMap: makeAttrsMap(attrs),
+      rawAttrsMap: {},
+      parent: parent,
+      children: []
+    }
+  }
+
+  /**
+   * Convert HTML string to AST.
+   */
+  function parse (
+    template,
+    options
+  ) {
+    warn$1 = options.warn || baseWarn;
+
+    platformIsPreTag = options.isPreTag || no;
+    platformMustUseProp = options.mustUseProp || no;
+    platformGetTagNamespace = options.getTagNamespace || no;
+    var isReservedTag = options.isReservedTag || no;
+    maybeComponent = function (el) { return !!(
+      el.component ||
+      el.attrsMap[':is'] ||
+      el.attrsMap['v-bind:is'] ||
+      !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+    ); };
+    transforms = pluckModuleFunction(options.modules, 'transformNode');
+    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+    delimiters = options.delimiters;
+
+    var stack = [];
+    var preserveWhitespace = options.preserveWhitespace !== false;
+    var whitespaceOption = options.whitespace;
+    var root;
+    var currentParent;
+    var inVPre = false;
+    var inPre = false;
+    var warned = false;
+
+    function warnOnce (msg, range) {
+      if (!warned) {
+        warned = true;
+        warn$1(msg, range);
+      }
+    }
+
+    function closeElement (element) {
+      trimEndingWhitespace(element);
+      if (!inVPre && !element.processed) {
+        element = processElement(element, options);
+      }
+      // tree management
+      if (!stack.length && element !== root) {
+        // allow root elements with v-if, v-else-if and v-else
+        if (root.if && (element.elseif || element.else)) {
+          {
+            checkRootConstraints(element);
+          }
+          addIfCondition(root, {
+            exp: element.elseif,
+            block: element
+          });
+        } else {
+          warnOnce(
+            "Component template should contain exactly one root element. " +
+            "If you are using v-if on multiple elements, " +
+            "use v-else-if to chain them instead.",
+            { start: element.start }
+          );
+        }
+      }
+      if (currentParent && !element.forbidden) {
+        if (element.elseif || element.else) {
+          processIfConditions(element, currentParent);
+        } else {
+          if (element.slotScope) {
+            // scoped slot
+            // keep it in the children list so that v-else(-if) conditions can
+            // find it as the prev node.
+            var name = element.slotTarget || '"default"'
+            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+          }
+          currentParent.children.push(element);
+          element.parent = currentParent;
+        }
+      }
+
+      // final children cleanup
+      // filter out scoped slots
+      element.children = element.children.filter(function (c) { return !(c).slotScope; });
+      // remove trailing whitespace node again
+      trimEndingWhitespace(element);
+
+      // check pre state
+      if (element.pre) {
+        inVPre = false;
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = false;
+      }
+      // apply post-transforms
+      for (var i = 0; i < postTransforms.length; i++) {
+        postTransforms[i](element, options);
+      }
+    }
+
+    function trimEndingWhitespace (el) {
+      // remove trailing whitespace node
+      if (!inPre) {
+        var lastNode;
+        while (
+          (lastNode = el.children[el.children.length - 1]) &&
+          lastNode.type === 3 &&
+          lastNode.text === ' '
+        ) {
+          el.children.pop();
+        }
+      }
+    }
+
+    function checkRootConstraints (el) {
+      if (el.tag === 'slot' || el.tag === 'template') {
+        warnOnce(
+          "Cannot use <" + (el.tag) + "> as component root element because it may " +
+          'contain multiple nodes.',
+          { start: el.start }
+        );
+      }
+      if (el.attrsMap.hasOwnProperty('v-for')) {
+        warnOnce(
+          'Cannot use v-for on stateful component root element because ' +
+          'it renders multiple elements.',
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+
+    parseHTML(template, {
+      warn: warn$1,
+      expectHTML: options.expectHTML,
+      isUnaryTag: options.isUnaryTag,
+      canBeLeftOpenTag: options.canBeLeftOpenTag,
+      shouldDecodeNewlines: options.shouldDecodeNewlines,
+      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+      shouldKeepComment: options.comments,
+      outputSourceRange: options.outputSourceRange,
+      start: function start (tag, attrs, unary, start$1, end) {
+        // check namespace.
+        // inherit parent ns if there is one
+        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+        // handle IE svg bug
+        /* istanbul ignore if */
+        if (isIE && ns === 'svg') {
+          attrs = guardIESVGBug(attrs);
+        }
+
+        var element = createASTElement(tag, attrs, currentParent);
+        if (ns) {
+          element.ns = ns;
+        }
+
+        {
+          if (options.outputSourceRange) {
+            element.start = start$1;
+            element.end = end;
+            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+              cumulated[attr.name] = attr;
+              return cumulated
+            }, {});
+          }
+          attrs.forEach(function (attr) {
+            if (invalidAttributeRE.test(attr.name)) {
+              warn$1(
+                "Invalid dynamic argument expression: attribute names cannot contain " +
+                "spaces, quotes, <, >, / or =.",
+                {
+                  start: attr.start + attr.name.indexOf("["),
+                  end: attr.start + attr.name.length
+                }
+              );
+            }
+          });
+        }
+
+        if (isForbiddenTag(element) && !isServerRendering()) {
+          element.forbidden = true;
+          warn$1(
+            'Templates should only be responsible for mapping the state to the ' +
+            'UI. Avoid placing tags with side-effects in your templates, such as ' +
+            "<" + tag + ">" + ', as they will not be parsed.',
+            { start: element.start }
+          );
+        }
+
+        // apply pre-transforms
+        for (var i = 0; i < preTransforms.length; i++) {
+          element = preTransforms[i](element, options) || element;
+        }
+
+        if (!inVPre) {
+          processPre(element);
+          if (element.pre) {
+            inVPre = true;
+          }
+        }
+        if (platformIsPreTag(element.tag)) {
+          inPre = true;
+        }
+        if (inVPre) {
+          processRawAttrs(element);
+        } else if (!element.processed) {
+          // structural directives
+          processFor(element);
+          processIf(element);
+          processOnce(element);
+        }
+
+        if (!root) {
+          root = element;
+          {
+            checkRootConstraints(root);
+          }
+        }
+
+        if (!unary) {
+          currentParent = element;
+          stack.push(element);
+        } else {
+          closeElement(element);
+        }
+      },
+
+      end: function end (tag, start, end$1) {
+        var element = stack[stack.length - 1];
+        // pop stack
+        stack.length -= 1;
+        currentParent = stack[stack.length - 1];
+        if (options.outputSourceRange) {
+          element.end = end$1;
+        }
+        closeElement(element);
+      },
+
+      chars: function chars (text, start, end) {
+        if (!currentParent) {
+          {
+            if (text === template) {
+              warnOnce(
+                'Component template requires a root element, rather than just text.',
+                { start: start }
+              );
+            } else if ((text = text.trim())) {
+              warnOnce(
+                ("text \"" + text + "\" outside root element will be ignored."),
+                { start: start }
+              );
+            }
+          }
+          return
+        }
+        // IE textarea placeholder bug
+        /* istanbul ignore if */
+        if (isIE &&
+          currentParent.tag === 'textarea' &&
+          currentParent.attrsMap.placeholder === text
+        ) {
+          return
+        }
+        var children = currentParent.children;
+        if (inPre || text.trim()) {
+          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+        } else if (!children.length) {
+          // remove the whitespace-only node right after an opening tag
+          text = '';
+        } else if (whitespaceOption) {
+          if (whitespaceOption === 'condense') {
+            // in condense mode, remove the whitespace node if it contains
+            // line break, otherwise condense to a single space
+            text = lineBreakRE.test(text) ? '' : ' ';
+          } else {
+            text = ' ';
+          }
+        } else {
+          text = preserveWhitespace ? ' ' : '';
+        }
+        if (text) {
+          if (!inPre && whitespaceOption === 'condense') {
+            // condense consecutive whitespaces into single space
+            text = text.replace(whitespaceRE, ' ');
+          }
+          var res;
+          var child;
+          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+            child = {
+              type: 2,
+              expression: res.expression,
+              tokens: res.tokens,
+              text: text
+            };
+          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+            child = {
+              type: 3,
+              text: text
+            };
+          }
+          if (child) {
+            if (options.outputSourceRange) {
+              child.start = start;
+              child.end = end;
+            }
+            children.push(child);
+          }
+        }
+      },
+      comment: function comment (text, start, end) {
+        // adding anything as a sibling to the root node is forbidden
+        // comments should still be allowed, but ignored
+        if (currentParent) {
+          var child = {
+            type: 3,
+            text: text,
+            isComment: true
+          };
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          currentParent.children.push(child);
+        }
+      }
+    });
+    return root
+  }
+
+  function processPre (el) {
+    if (getAndRemoveAttr(el, 'v-pre') != null) {
+      el.pre = true;
+    }
+  }
+
+  function processRawAttrs (el) {
+    var list = el.attrsList;
+    var len = list.length;
+    if (len) {
+      var attrs = el.attrs = new Array(len);
+      for (var i = 0; i < len; i++) {
+        attrs[i] = {
+          name: list[i].name,
+          value: JSON.stringify(list[i].value)
+        };
+        if (list[i].start != null) {
+          attrs[i].start = list[i].start;
+          attrs[i].end = list[i].end;
+        }
+      }
+    } else if (!el.pre) {
+      // non root node in pre blocks with no attributes
+      el.plain = true;
+    }
+  }
+
+  function processElement (
+    element,
+    options
+  ) {
+    processKey(element);
+
+    // determine whether this is a plain element after
+    // removing structural attributes
+    element.plain = (
+      !element.key &&
+      !element.scopedSlots &&
+      !element.attrsList.length
+    );
+
+    processRef(element);
+    processSlotContent(element);
+    processSlotOutlet(element);
+    processComponent(element);
+    for (var i = 0; i < transforms.length; i++) {
+      element = transforms[i](element, options) || element;
+    }
+    processAttrs(element);
+    return element
+  }
+
+  function processKey (el) {
+    var exp = getBindingAttr(el, 'key');
+    if (exp) {
+      {
+        if (el.tag === 'template') {
+          warn$1(
+            "<template> cannot be keyed. Place the key on real elements instead.",
+            getRawBindingAttr(el, 'key')
+          );
+        }
+        if (el.for) {
+          var iterator = el.iterator2 || el.iterator1;
+          var parent = el.parent;
+          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+            warn$1(
+              "Do not use v-for index as key on <transition-group> children, " +
+              "this is the same as not using keys.",
+              getRawBindingAttr(el, 'key'),
+              true /* tip */
+            );
+          }
+        }
+      }
+      el.key = exp;
+    }
+  }
+
+  function processRef (el) {
+    var ref = getBindingAttr(el, 'ref');
+    if (ref) {
+      el.ref = ref;
+      el.refInFor = checkInFor(el);
+    }
+  }
+
+  function processFor (el) {
+    var exp;
+    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+      var res = parseFor(exp);
+      if (res) {
+        extend(el, res);
+      } else {
+        warn$1(
+          ("Invalid v-for expression: " + exp),
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+  }
+
+
+
+  function parseFor (exp) {
+    var inMatch = exp.match(forAliasRE);
+    if (!inMatch) { return }
+    var res = {};
+    res.for = inMatch[2].trim();
+    var alias = inMatch[1].trim().replace(stripParensRE, '');
+    var iteratorMatch = alias.match(forIteratorRE);
+    if (iteratorMatch) {
+      res.alias = alias.replace(forIteratorRE, '').trim();
+      res.iterator1 = iteratorMatch[1].trim();
+      if (iteratorMatch[2]) {
+        res.iterator2 = iteratorMatch[2].trim();
+      }
+    } else {
+      res.alias = alias;
+    }
+    return res
+  }
+
+  function processIf (el) {
+    var exp = getAndRemoveAttr(el, 'v-if');
+    if (exp) {
+      el.if = exp;
+      addIfCondition(el, {
+        exp: exp,
+        block: el
+      });
+    } else {
+      if (getAndRemoveAttr(el, 'v-else') != null) {
+        el.else = true;
+      }
+      var elseif = getAndRemoveAttr(el, 'v-else-if');
+      if (elseif) {
+        el.elseif = elseif;
+      }
+    }
+  }
+
+  function processIfConditions (el, parent) {
+    var prev = findPrevElement(parent.children);
+    if (prev && prev.if) {
+      addIfCondition(prev, {
+        exp: el.elseif,
+        block: el
+      });
+    } else {
+      warn$1(
+        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+        "used on element <" + (el.tag) + "> without corresponding v-if.",
+        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+      );
+    }
+  }
+
+  function findPrevElement (children) {
+    var i = children.length;
+    while (i--) {
+      if (children[i].type === 1) {
+        return children[i]
+      } else {
+        if (children[i].text !== ' ') {
+          warn$1(
+            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+            "will be ignored.",
+            children[i]
+          );
+        }
+        children.pop();
+      }
+    }
+  }
+
+  function addIfCondition (el, condition) {
+    if (!el.ifConditions) {
+      el.ifConditions = [];
+    }
+    el.ifConditions.push(condition);
+  }
+
+  function processOnce (el) {
+    var once$$1 = getAndRemoveAttr(el, 'v-once');
+    if (once$$1 != null) {
+      el.once = true;
+    }
+  }
+
+  // handle content being passed to a component as slot,
+  // e.g. <template slot="xxx">, <div slot-scope="xxx">
+  function processSlotContent (el) {
+    var slotScope;
+    if (el.tag === 'template') {
+      slotScope = getAndRemoveAttr(el, 'scope');
+      /* istanbul ignore if */
+      if (slotScope) {
+        warn$1(
+          "the \"scope\" attribute for scoped slots have been deprecated and " +
+          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+          "can also be used on plain elements in addition to <template> to " +
+          "denote scoped slots.",
+          el.rawAttrsMap['scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          el.rawAttrsMap['slot-scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope;
+    }
+
+    // slot="xxx"
+    var slotTarget = getBindingAttr(el, 'slot');
+    if (slotTarget) {
+      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+      // preserve slot as an attribute for native shadow DOM compat
+      // only for non-scoped slots.
+      if (el.tag !== 'template' && !el.slotScope) {
+        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+      }
+    }
+
+    // 2.6 v-slot syntax
+    {
+      if (el.tag === 'template') {
+        // v-slot on <template>
+        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding) {
+          {
+            if (el.slotTarget || el.slotScope) {
+              warn$1(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.parent && !maybeComponent(el.parent)) {
+              warn$1(
+                "<template v-slot> can only appear at the root level inside " +
+                "the receiving component",
+                el
+              );
+            }
+          }
+          var ref = getSlotName(slotBinding);
+          var name = ref.name;
+          var dynamic = ref.dynamic;
+          el.slotTarget = name;
+          el.slotTargetDynamic = dynamic;
+          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+        }
+      } else {
+        // v-slot on component, denotes default slot
+        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding$1) {
+          {
+            if (!maybeComponent(el)) {
+              warn$1(
+                "v-slot can only be used on components or <template>.",
+                slotBinding$1
+              );
+            }
+            if (el.slotScope || el.slotTarget) {
+              warn$1(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.scopedSlots) {
+              warn$1(
+                "To avoid scope ambiguity, the default slot should also use " +
+                "<template> syntax when there are other named slots.",
+                slotBinding$1
+              );
+            }
+          }
+          // add the component's children to its default slot
+          var slots = el.scopedSlots || (el.scopedSlots = {});
+          var ref$1 = getSlotName(slotBinding$1);
+          var name$1 = ref$1.name;
+          var dynamic$1 = ref$1.dynamic;
+          var slotContainer = slots[name$1] = createASTElement('template', [], el);
+          slotContainer.slotTarget = name$1;
+          slotContainer.slotTargetDynamic = dynamic$1;
+          slotContainer.children = el.children.filter(function (c) {
+            if (!c.slotScope) {
+              c.parent = slotContainer;
+              return true
+            }
+          });
+          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+          // remove children as they are returned from scopedSlots now
+          el.children = [];
+          // mark el non-plain so data gets generated
+          el.plain = false;
+        }
+      }
+    }
+  }
+
+  function getSlotName (binding) {
+    var name = binding.name.replace(slotRE, '');
+    if (!name) {
+      if (binding.name[0] !== '#') {
+        name = 'default';
+      } else {
+        warn$1(
+          "v-slot shorthand syntax requires a slot name.",
+          binding
+        );
+      }
+    }
+    return dynamicArgRE.test(name)
+      // dynamic [name]
+      ? { name: name.slice(1, -1), dynamic: true }
+      // static name
+      : { name: ("\"" + name + "\""), dynamic: false }
+  }
+
+  // handle <slot/> outlets
+  function processSlotOutlet (el) {
+    if (el.tag === 'slot') {
+      el.slotName = getBindingAttr(el, 'name');
+      if (el.key) {
+        warn$1(
+          "`key` does not work on <slot> because slots are abstract outlets " +
+          "and can possibly expand into multiple elements. " +
+          "Use the key on a wrapping element instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+    }
+  }
+
+  function processComponent (el) {
+    var binding;
+    if ((binding = getBindingAttr(el, 'is'))) {
+      el.component = binding;
+    }
+    if (getAndRemoveAttr(el, 'inline-template') != null) {
+      el.inlineTemplate = true;
+    }
+  }
+
+  function processAttrs (el) {
+    var list = el.attrsList;
+    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+    for (i = 0, l = list.length; i < l; i++) {
+      name = rawName = list[i].name;
+      value = list[i].value;
+      if (dirRE.test(name)) {
+        // mark element as dynamic
+        el.hasBindings = true;
+        // modifiers
+        modifiers = parseModifiers(name.replace(dirRE, ''));
+        // support .foo shorthand syntax for the .prop modifier
+        if (modifiers) {
+          name = name.replace(modifierRE, '');
+        }
+        if (bindRE.test(name)) { // v-bind
+          name = name.replace(bindRE, '');
+          value = parseFilters(value);
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          if (
+            value.trim().length === 0
+          ) {
+            warn$1(
+              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+            );
+          }
+          if (modifiers) {
+            if (modifiers.prop && !isDynamic) {
+              name = camelize(name);
+              if (name === 'innerHtml') { name = 'innerHTML'; }
+            }
+            if (modifiers.camel && !isDynamic) {
+              name = camelize(name);
+            }
+            if (modifiers.sync) {
+              syncGen = genAssignmentCode(value, "$event");
+              if (!isDynamic) {
+                addHandler(
+                  el,
+                  ("update:" + (camelize(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i]
+                );
+                if (hyphenate(name) !== camelize(name)) {
+                  addHandler(
+                    el,
+                    ("update:" + (hyphenate(name))),
+                    syncGen,
+                    null,
+                    false,
+                    warn$1,
+                    list[i]
+                  );
+                }
+              } else {
+                // handler w/ dynamic event name
+                addHandler(
+                  el,
+                  ("\"update:\"+(" + name + ")"),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i],
+                  true // dynamic
+                );
+              }
+            }
+          }
+          if ((modifiers && modifiers.prop) || (
+            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+          )) {
+            addProp(el, name, value, list[i], isDynamic);
+          } else {
+            addAttr(el, name, value, list[i], isDynamic);
+          }
+        } else if (onRE.test(name)) { // v-on
+          name = name.replace(onRE, '');
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          addHandler(el, name, value, modifiers, false, warn$1, list[i], isDynamic);
+        } else { // normal directives
+          name = name.replace(dirRE, '');
+          // parse arg
+          var argMatch = name.match(argRE);
+          var arg = argMatch && argMatch[1];
+          isDynamic = false;
+          if (arg) {
+            name = name.slice(0, -(arg.length + 1));
+            if (dynamicArgRE.test(arg)) {
+              arg = arg.slice(1, -1);
+              isDynamic = true;
+            }
+          }
+          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+          if (name === 'model') {
+            checkForAliasModel(el, value);
+          }
+        }
+      } else {
+        // literal attribute
+        {
+          var res = parseText(value, delimiters);
+          if (res) {
+            warn$1(
+              name + "=\"" + value + "\": " +
+              'Interpolation inside attributes has been removed. ' +
+              'Use v-bind or the colon shorthand instead. For example, ' +
+              'instead of <div id="{{ val }}">, use <div :id="val">.',
+              list[i]
+            );
+          }
+        }
+        addAttr(el, name, JSON.stringify(value), list[i]);
+        // #6887 firefox doesn't update muted state if set via attribute
+        // even immediately after element creation
+        if (!el.component &&
+            name === 'muted' &&
+            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+          addProp(el, name, 'true', list[i]);
+        }
+      }
+    }
+  }
+
+  function checkInFor (el) {
+    var parent = el;
+    while (parent) {
+      if (parent.for !== undefined) {
+        return true
+      }
+      parent = parent.parent;
+    }
+    return false
+  }
+
+  function parseModifiers (name) {
+    var match = name.match(modifierRE);
+    if (match) {
+      var ret = {};
+      match.forEach(function (m) { ret[m.slice(1)] = true; });
+      return ret
+    }
+  }
+
+  function makeAttrsMap (attrs) {
+    var map = {};
+    for (var i = 0, l = attrs.length; i < l; i++) {
+      if (
+        map[attrs[i].name] && !isIE && !isEdge
+      ) {
+        warn$1('duplicate attribute: ' + attrs[i].name, attrs[i]);
+      }
+      map[attrs[i].name] = attrs[i].value;
+    }
+    return map
+  }
+
+  // for script (e.g. type="x/template") or style, do not decode content
+  function isTextTag (el) {
+    return el.tag === 'script' || el.tag === 'style'
+  }
+
+  function isForbiddenTag (el) {
+    return (
+      el.tag === 'style' ||
+      (el.tag === 'script' && (
+        !el.attrsMap.type ||
+        el.attrsMap.type === 'text/javascript'
+      ))
+    )
+  }
+
+  var ieNSBug = /^xmlns:NS\d+/;
+  var ieNSPrefix = /^NS\d+:/;
+
+  /* istanbul ignore next */
+  function guardIESVGBug (attrs) {
+    var res = [];
+    for (var i = 0; i < attrs.length; i++) {
+      var attr = attrs[i];
+      if (!ieNSBug.test(attr.name)) {
+        attr.name = attr.name.replace(ieNSPrefix, '');
+        res.push(attr);
+      }
+    }
+    return res
+  }
+
+  function checkForAliasModel (el, value) {
+    var _el = el;
+    while (_el) {
+      if (_el.for && _el.alias === value) {
+        warn$1(
+          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+          "You are binding v-model directly to a v-for iteration alias. " +
+          "This will not be able to modify the v-for source array because " +
+          "writing to the alias is like modifying a function local variable. " +
+          "Consider using an array of objects and use v-model on an object property instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+      _el = _el.parent;
+    }
+  }
+
+  /*  */
+
+  function preTransformNode (el, options) {
+    if (el.tag === 'input') {
+      var map = el.attrsMap;
+      if (!map['v-model']) {
+        return
+      }
+
+      var typeBinding;
+      if (map[':type'] || map['v-bind:type']) {
+        typeBinding = getBindingAttr(el, 'type');
+      }
+      if (!map.type && !typeBinding && map['v-bind']) {
+        typeBinding = "(" + (map['v-bind']) + ").type";
+      }
+
+      if (typeBinding) {
+        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+        // 1. checkbox
+        var branch0 = cloneASTElement(el);
+        // process for on the main node
+        processFor(branch0);
+        addRawAttr(branch0, 'type', 'checkbox');
+        processElement(branch0, options);
+        branch0.processed = true; // prevent it from double-processed
+        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+        addIfCondition(branch0, {
+          exp: branch0.if,
+          block: branch0
+        });
+        // 2. add radio else-if condition
+        var branch1 = cloneASTElement(el);
+        getAndRemoveAttr(branch1, 'v-for', true);
+        addRawAttr(branch1, 'type', 'radio');
+        processElement(branch1, options);
+        addIfCondition(branch0, {
+          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+          block: branch1
+        });
+        // 3. other
+        var branch2 = cloneASTElement(el);
+        getAndRemoveAttr(branch2, 'v-for', true);
+        addRawAttr(branch2, ':type', typeBinding);
+        processElement(branch2, options);
+        addIfCondition(branch0, {
+          exp: ifCondition,
+          block: branch2
+        });
+
+        if (hasElse) {
+          branch0.else = true;
+        } else if (elseIfCondition) {
+          branch0.elseif = elseIfCondition;
+        }
+
+        return branch0
+      }
+    }
+  }
+
+  function cloneASTElement (el) {
+    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+  }
+
+  var model$1 = {
+    preTransformNode: preTransformNode
+  };
+
+  var modules$1 = [
+    klass,
+    style,
+    model$1
+  ];
+
+  /*  */
+
+  var warn$2;
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+
+  function model$2 (
+    el,
+    dir,
+    _warn
+  ) {
+    warn$2 = _warn;
+    var value = dir.value;
+    var modifiers = dir.modifiers;
+    var tag = el.tag;
+    var type = el.attrsMap.type;
+
+    {
+      // inputs with type="file" are read only and setting the input's
+      // value will throw an error.
+      if (tag === 'input' && type === 'file') {
+        warn$2(
+          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+          "File inputs are read only. Use a v-on:change listener instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+    }
+
+    if (el.component) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else if (tag === 'select') {
+      genSelect(el, value, modifiers);
+    } else if (tag === 'input' && type === 'checkbox') {
+      genCheckboxModel(el, value, modifiers);
+    } else if (tag === 'input' && type === 'radio') {
+      genRadioModel(el, value, modifiers);
+    } else if (tag === 'input' || tag === 'textarea') {
+      genDefaultModel(el, value, modifiers);
+    } else {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    }
+
+    // ensure runtime directive metadata
+    return true
+  }
+
+  function genCheckboxModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+    addProp(el, 'checked',
+      "Array.isArray(" + value + ")" +
+      "?_i(" + value + "," + valueBinding + ")>-1" + (
+        trueValueBinding === 'true'
+          ? (":(" + value + ")")
+          : (":_q(" + value + "," + trueValueBinding + ")")
+      )
+    );
+    addHandler(el, 'change',
+      "var $$a=" + value + "," +
+          '$$el=$event.target,' +
+          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+      'if(Array.isArray($$a)){' +
+        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+            '$$i=_i($$a,$$v);' +
+        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+      null, true
+    );
+  }
+
+  function genRadioModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+  }
+
+  function genSelect (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var selectedVal = "Array.prototype.filter" +
+      ".call($event.target.options,function(o){return o.selected})" +
+      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+      "return " + (number ? '_n(val)' : 'val') + "})";
+
+    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+    var code = "var $$selectedVal = " + selectedVal + ";";
+    code = code + " " + (genAssignmentCode(value, assignment));
+    addHandler(el, 'change', code, null, true);
+  }
+
+  function genDefaultModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var type = el.attrsMap.type;
+
+    // warn if v-bind:value conflicts with v-model
+    // except for inputs with v-bind:type
+    {
+      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+      if (value$1 && !typeBinding) {
+        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+        warn$2(
+          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+          'because the latter already expands to a value binding internally',
+          el.rawAttrsMap[binding]
+        );
+      }
+    }
+
+    var ref = modifiers || {};
+    var lazy = ref.lazy;
+    var number = ref.number;
+    var trim = ref.trim;
+    var needCompositionGuard = !lazy && type !== 'range';
+    var event = lazy
+      ? 'change'
+      : type === 'range'
+        ? RANGE_TOKEN
+        : 'input';
+
+    var valueExpression = '$event.target.value';
+    if (trim) {
+      valueExpression = "$event.target.value.trim()";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+
+    var code = genAssignmentCode(value, valueExpression);
+    if (needCompositionGuard) {
+      code = "if($event.target.composing)return;" + code;
+    }
+
+    addProp(el, 'value', ("(" + value + ")"));
+    addHandler(el, event, code, null, true);
+    if (trim || number) {
+      addHandler(el, 'blur', '$forceUpdate()');
+    }
+  }
+
+  /*  */
+
+  function text (el, dir) {
+    if (dir.value) {
+      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  /*  */
+
+  function html (el, dir) {
+    if (dir.value) {
+      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  var directives$1 = {
+    model: model$2,
+    text: text,
+    html: html
+  };
+
+  /*  */
+
+  var baseOptions = {
+    expectHTML: true,
+    modules: modules$1,
+    directives: directives$1,
+    isPreTag: isPreTag,
+    isUnaryTag: isUnaryTag,
+    mustUseProp: mustUseProp,
+    canBeLeftOpenTag: canBeLeftOpenTag,
+    isReservedTag: isReservedTag,
+    getTagNamespace: getTagNamespace,
+    staticKeys: genStaticKeys(modules$1)
+  };
+
+  /*  */
+
+  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+  var fnInvokeRE = /\([^)]*?\);*$/;
+  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+  // KeyboardEvent.keyCode aliases
+  var keyCodes = {
+    esc: 27,
+    tab: 9,
+    enter: 13,
+    space: 32,
+    up: 38,
+    left: 37,
+    right: 39,
+    down: 40,
+    'delete': [8, 46]
+  };
+
+  // KeyboardEvent.key aliases
+  var keyNames = {
+    // #7880: IE11 and Edge use `Esc` for Escape key name.
+    esc: ['Esc', 'Escape'],
+    tab: 'Tab',
+    enter: 'Enter',
+    // #9112: IE11 uses `Spacebar` for Space key name.
+    space: [' ', 'Spacebar'],
+    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+    up: ['Up', 'ArrowUp'],
+    left: ['Left', 'ArrowLeft'],
+    right: ['Right', 'ArrowRight'],
+    down: ['Down', 'ArrowDown'],
+    // #9112: IE11 uses `Del` for Delete key name.
+    'delete': ['Backspace', 'Delete', 'Del']
+  };
+
+  // #4868: modifiers that prevent the execution of the listener
+  // need to explicitly return null so that we can determine whether to remove
+  // the listener for .once
+  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+  var modifierCode = {
+    stop: '$event.stopPropagation();',
+    prevent: '$event.preventDefault();',
+    self: genGuard("$event.target !== $event.currentTarget"),
+    ctrl: genGuard("!$event.ctrlKey"),
+    shift: genGuard("!$event.shiftKey"),
+    alt: genGuard("!$event.altKey"),
+    meta: genGuard("!$event.metaKey"),
+    left: genGuard("'button' in $event && $event.button !== 0"),
+    middle: genGuard("'button' in $event && $event.button !== 1"),
+    right: genGuard("'button' in $event && $event.button !== 2")
+  };
+
+  function genHandlers (
+    events,
+    isNative
+  ) {
+    var prefix = isNative ? 'nativeOn:' : 'on:';
+    var staticHandlers = "";
+    var dynamicHandlers = "";
+    for (var name in events) {
+      var handlerCode = genHandler(events[name]);
+      if (events[name] && events[name].dynamic) {
+        dynamicHandlers += name + "," + handlerCode + ",";
+      } else {
+        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+      }
+    }
+    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+    if (dynamicHandlers) {
+      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+    } else {
+      return prefix + staticHandlers
+    }
+  }
+
+  function genHandler (handler) {
+    if (!handler) {
+      return 'function(){}'
+    }
+
+    if (Array.isArray(handler)) {
+      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+    }
+
+    var isMethodPath = simplePathRE.test(handler.value);
+    var isFunctionExpression = fnExpRE.test(handler.value);
+    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+    if (!handler.modifiers) {
+      if (isMethodPath || isFunctionExpression) {
+        return handler.value
+      }
+      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+    } else {
+      var code = '';
+      var genModifierCode = '';
+      var keys = [];
+      for (var key in handler.modifiers) {
+        if (modifierCode[key]) {
+          genModifierCode += modifierCode[key];
+          // left/right
+          if (keyCodes[key]) {
+            keys.push(key);
+          }
+        } else if (key === 'exact') {
+          var modifiers = (handler.modifiers);
+          genModifierCode += genGuard(
+            ['ctrl', 'shift', 'alt', 'meta']
+              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+              .join('||')
+          );
+        } else {
+          keys.push(key);
+        }
+      }
+      if (keys.length) {
+        code += genKeyFilter(keys);
+      }
+      // Make sure modifiers like prevent and stop get executed after key filtering
+      if (genModifierCode) {
+        code += genModifierCode;
+      }
+      var handlerCode = isMethodPath
+        ? ("return " + (handler.value) + ".apply(null, arguments)")
+        : isFunctionExpression
+          ? ("return (" + (handler.value) + ").apply(null, arguments)")
+          : isFunctionInvocation
+            ? ("return " + (handler.value))
+            : handler.value;
+      return ("function($event){" + code + handlerCode + "}")
+    }
+  }
+
+  function genKeyFilter (keys) {
+    return (
+      // make sure the key filters only apply to KeyboardEvents
+      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+      // key events that do not have keyCode property...
+      "if(!$event.type.indexOf('key')&&" +
+      (keys.map(genFilterCode).join('&&')) + ")return null;"
+    )
+  }
+
+  function genFilterCode (key) {
+    var keyVal = parseInt(key, 10);
+    if (keyVal) {
+      return ("$event.keyCode!==" + keyVal)
+    }
+    var keyCode = keyCodes[key];
+    var keyName = keyNames[key];
+    return (
+      "_k($event.keyCode," +
+      (JSON.stringify(key)) + "," +
+      (JSON.stringify(keyCode)) + "," +
+      "$event.key," +
+      "" + (JSON.stringify(keyName)) +
+      ")"
+    )
+  }
+
+  /*  */
+
+  function on (el, dir) {
+    if (dir.modifiers) {
+      warn("v-on without argument does not support modifiers.");
+    }
+    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+  }
+
+  /*  */
+
+  function bind$1 (el, dir) {
+    el.wrapData = function (code) {
+      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+    };
+  }
+
+  /*  */
+
+  var baseDirectives = {
+    on: on,
+    bind: bind$1,
+    cloak: noop
+  };
+
+  /*  */
+
+
+
+
+
+  var CodegenState = function CodegenState (options) {
+    this.options = options;
+    this.warn = options.warn || baseWarn;
+    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+    this.directives = extend(extend({}, baseDirectives), options.directives);
+    var isReservedTag = options.isReservedTag || no;
+    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+    this.onceId = 0;
+    this.staticRenderFns = [];
+    this.pre = false;
+  };
+
+
+
+  function generate (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    // fix #11483, Root level <script> tags should not be rendered.
+    var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
+    }
+  }
+
+  function genElement (el, state) {
+    if (el.parent) {
+      el.pre = el.pre || el.parent.pre;
+    }
+
+    if (el.staticRoot && !el.staticProcessed) {
+      return genStatic(el, state)
+    } else if (el.once && !el.onceProcessed) {
+      return genOnce(el, state)
+    } else if (el.for && !el.forProcessed) {
+      return genFor(el, state)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+      return genChildren(el, state) || 'void 0'
+    } else if (el.tag === 'slot') {
+      return genSlot(el, state)
+    } else {
+      // component or element
+      var code;
+      if (el.component) {
+        code = genComponent(el.component, el, state);
+      } else {
+        var data;
+        if (!el.plain || (el.pre && state.maybeComponent(el))) {
+          data = genData$2(el, state);
+        }
+
+        var children = el.inlineTemplate ? null : genChildren(el, state, true);
+        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      }
+      // module transforms
+      for (var i = 0; i < state.transforms.length; i++) {
+        code = state.transforms[i](el, code);
+      }
+      return code
+    }
+  }
+
+  // hoist static sub-trees out
+  function genStatic (el, state) {
+    el.staticProcessed = true;
+    // Some elements (templates) need to behave differently inside of a v-pre
+    // node.  All pre nodes are static roots, so we can use this as a location to
+    // wrap a state change and reset it upon exiting the pre node.
+    var originalPreState = state.pre;
+    if (el.pre) {
+      state.pre = el.pre;
+    }
+    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+    state.pre = originalPreState;
+    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+  }
+
+  // v-once
+  function genOnce (el, state) {
+    el.onceProcessed = true;
+    if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.staticInFor) {
+      var key = '';
+      var parent = el.parent;
+      while (parent) {
+        if (parent.for) {
+          key = parent.key;
+          break
         }
+        parent = parent.parent;
+      }
+      if (!key) {
+        state.warn(
+          "v-once can only be used inside v-for that is keyed. ",
+          el.rawAttrsMap['v-once']
+        );
+        return genElement(el, state)
+      }
+      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+    } else {
+      return genStatic(el, state)
+    }
+  }
+
+  function genIf (
+    el,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    el.ifProcessed = true; // avoid recursion
+    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+  }
+
+  function genIfConditions (
+    conditions,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    if (!conditions.length) {
+      return altEmpty || '_e()'
+    }
+
+    var condition = conditions.shift();
+    if (condition.exp) {
+      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+    } else {
+      return ("" + (genTernaryExp(condition.block)))
+    }
+
+    // v-if with v-once should generate code like (a)?_m(0):_m(1)
+    function genTernaryExp (el) {
+      return altGen
+        ? altGen(el, state)
+        : el.once
+          ? genOnce(el, state)
+          : genElement(el, state)
+    }
+  }
 
-        // Doctype:
-        var doctypeMatch = html.match(doctype);
-        if (doctypeMatch) {
-          advance(doctypeMatch[0].length);
-          continue
-        }
+  function genFor (
+    el,
+    state,
+    altGen,
+    altHelper
+  ) {
+    var exp = el.for;
+    var alias = el.alias;
+    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+    if (state.maybeComponent(el) &&
+      el.tag !== 'slot' &&
+      el.tag !== 'template' &&
+      !el.key
+    ) {
+      state.warn(
+        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+        "v-for should have explicit keys. " +
+        "See https://vuejs.org/guide/list.html#key for more info.",
+        el.rawAttrsMap['v-for'],
+        true /* tip */
+      );
+    }
 
-        // End tag:
-        var endTagMatch = html.match(endTag);
-        if (endTagMatch) {
-          var curIndex = index;
-          advance(endTagMatch[0].length);
-          parseEndTag(endTagMatch[1], curIndex, index);
-          continue
-        }
+    el.forProcessed = true; // avoid recursion
+    return (altHelper || '_l') + "((" + exp + ")," +
+      "function(" + alias + iterator1 + iterator2 + "){" +
+        "return " + ((altGen || genElement)(el, state)) +
+      '})'
+  }
 
-        // Start tag:
-        var startTagMatch = parseStartTag();
-        if (startTagMatch) {
-          handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
-            advance(1);
-          }
-          continue
-        }
+  function genData$2 (el, state) {
+    var data = '{';
+
+    // directives first.
+    // directives may mutate the el's other properties before they are generated.
+    var dirs = genDirectives(el, state);
+    if (dirs) { data += dirs + ','; }
+
+    // key
+    if (el.key) {
+      data += "key:" + (el.key) + ",";
+    }
+    // ref
+    if (el.ref) {
+      data += "ref:" + (el.ref) + ",";
+    }
+    if (el.refInFor) {
+      data += "refInFor:true,";
+    }
+    // pre
+    if (el.pre) {
+      data += "pre:true,";
+    }
+    // record original tag name for components using "is" attribute
+    if (el.component) {
+      data += "tag:\"" + (el.tag) + "\",";
+    }
+    // module data generation functions
+    for (var i = 0; i < state.dataGenFns.length; i++) {
+      data += state.dataGenFns[i](el);
+    }
+    // attributes
+    if (el.attrs) {
+      data += "attrs:" + (genProps(el.attrs)) + ",";
+    }
+    // DOM props
+    if (el.props) {
+      data += "domProps:" + (genProps(el.props)) + ",";
+    }
+    // event handlers
+    if (el.events) {
+      data += (genHandlers(el.events, false)) + ",";
+    }
+    if (el.nativeEvents) {
+      data += (genHandlers(el.nativeEvents, true)) + ",";
+    }
+    // slot target
+    // only for non-scoped slots
+    if (el.slotTarget && !el.slotScope) {
+      data += "slot:" + (el.slotTarget) + ",";
+    }
+    // scoped slots
+    if (el.scopedSlots) {
+      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+    }
+    // component v-model
+    if (el.model) {
+      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+    }
+    // inline-template
+    if (el.inlineTemplate) {
+      var inlineTemplate = genInlineTemplate(el, state);
+      if (inlineTemplate) {
+        data += inlineTemplate + ",";
+      }
+    }
+    data = data.replace(/,$/, '') + '}';
+    // v-bind dynamic argument wrap
+    // v-bind with dynamic arguments must be applied using the same v-bind object
+    // merge helper so that class/style/mustUseProp attrs are handled correctly.
+    if (el.dynamicAttrs) {
+      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+    }
+    // v-bind data wrap
+    if (el.wrapData) {
+      data = el.wrapData(data);
+    }
+    // v-on data wrap
+    if (el.wrapListeners) {
+      data = el.wrapListeners(data);
+    }
+    return data
+  }
+
+  function genDirectives (el, state) {
+    var dirs = el.directives;
+    if (!dirs) { return }
+    var res = 'directives:[';
+    var hasRuntime = false;
+    var i, l, dir, needRuntime;
+    for (i = 0, l = dirs.length; i < l; i++) {
+      dir = dirs[i];
+      needRuntime = true;
+      var gen = state.directives[dir.name];
+      if (gen) {
+        // compile-time directive that manipulates AST.
+        // returns true if it also needs a runtime counterpart.
+        needRuntime = !!gen(el, dir, state.warn);
+      }
+      if (needRuntime) {
+        hasRuntime = true;
+        res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
       }
+    }
+    if (hasRuntime) {
+      return res.slice(0, -1) + ']'
+    }
+  }
 
-      var text = (void 0), rest = (void 0), next = (void 0);
-      if (textEnd >= 0) {
-        rest = html.slice(textEnd);
-        while (
-          !endTag.test(rest) &&
-          !startTagOpen.test(rest) &&
-          !comment.test(rest) &&
-          !conditionalComment.test(rest)
+  function genInlineTemplate (el, state) {
+    var ast = el.children[0];
+    if (el.children.length !== 1 || ast.type !== 1) {
+      state.warn(
+        'Inline-template components must have exactly one child element.',
+        { start: el.start }
+      );
+    }
+    if (ast && ast.type === 1) {
+      var inlineRenderFns = generate(ast, state.options);
+      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+    }
+  }
+
+  function genScopedSlots (
+    el,
+    slots,
+    state
+  ) {
+    // by default scoped slots are considered "stable", this allows child
+    // components with only scoped slots to skip forced updates from parent.
+    // but in some cases we have to bail-out of this optimization
+    // for example if the slot contains dynamic names, has v-if or v-for on them...
+    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+      var slot = slots[key];
+      return (
+        slot.slotTargetDynamic ||
+        slot.if ||
+        slot.for ||
+        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+      )
+    });
+
+    // #9534: if a component with scoped slots is inside a conditional branch,
+    // it's possible for the same component to be reused but with different
+    // compiled slot content. To avoid that, we generate a unique key based on
+    // the generated code of all the slot contents.
+    var needsKey = !!el.if;
+
+    // OR when it is inside another scoped slot or v-for (the reactivity may be
+    // disconnected due to the intermediate scope variable)
+    // #9438, #9506
+    // TODO: this can be further optimized by properly analyzing in-scope bindings
+    // and skip force updating ones that do not actually use scope variables.
+    if (!needsForceUpdate) {
+      var parent = el.parent;
+      while (parent) {
+        if (
+          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+          parent.for
         ) {
-          // < in plain text, be forgiving and treat it as text
-          next = rest.indexOf('<', 1);
-          if (next < 0) { break }
-          textEnd += next;
-          rest = html.slice(textEnd);
+          needsForceUpdate = true;
+          break
         }
-        text = html.substring(0, textEnd);
-        advance(textEnd);
+        if (parent.if) {
+          needsKey = true;
+        }
+        parent = parent.parent;
+      }
+    }
+
+    var generatedSlots = Object.keys(slots)
+      .map(function (key) { return genScopedSlot(slots[key], state); })
+      .join(',');
+
+    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+  }
+
+  function hash(str) {
+    var hash = 5381;
+    var i = str.length;
+    while(i) {
+      hash = (hash * 33) ^ str.charCodeAt(--i);
+    }
+    return hash >>> 0
+  }
+
+  function containsSlotChild (el) {
+    if (el.type === 1) {
+      if (el.tag === 'slot') {
+        return true
+      }
+      return el.children.some(containsSlotChild)
+    }
+    return false
+  }
+
+  function genScopedSlot (
+    el,
+    state
+  ) {
+    var isLegacySyntax = el.attrsMap['slot-scope'];
+    if (el.if && !el.ifProcessed && !isLegacySyntax) {
+      return genIf(el, state, genScopedSlot, "null")
+    }
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genScopedSlot)
+    }
+    var slotScope = el.slotScope === emptySlotScopeToken
+      ? ""
+      : String(el.slotScope);
+    var fn = "function(" + slotScope + "){" +
+      "return " + (el.tag === 'template'
+        ? el.if && isLegacySyntax
+          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+          : genChildren(el, state) || 'undefined'
+        : genElement(el, state)) + "}";
+    // reverse proxy v-slot without scope on this.$slots
+    var reverseProxy = slotScope ? "" : ",proxy:true";
+    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+  }
+
+  function genChildren (
+    el,
+    state,
+    checkSkip,
+    altGenElement,
+    altGenNode
+  ) {
+    var children = el.children;
+    if (children.length) {
+      var el$1 = children[0];
+      // optimize single v-for
+      if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot'
+      ) {
+        var normalizationType = checkSkip
+          ? state.maybeComponent(el$1) ? ",1" : ",0"
+          : "";
+        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
       }
+      var normalizationType$1 = checkSkip
+        ? getNormalizationType(children, state.maybeComponent)
+        : 0;
+      var gen = altGenNode || genNode;
+      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+    }
+  }
 
-      if (textEnd < 0) {
-        text = html;
-        html = '';
+  // determine the normalization needed for the children array.
+  // 0: no normalization needed
+  // 1: simple normalization needed (possible 1-level deep nested array)
+  // 2: full normalization needed
+  function getNormalizationType (
+    children,
+    maybeComponent
+  ) {
+    var res = 0;
+    for (var i = 0; i < children.length; i++) {
+      var el = children[i];
+      if (el.type !== 1) {
+        continue
+      }
+      if (needsNormalization(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+        res = 2;
+        break
+      }
+      if (maybeComponent(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+        res = 1;
       }
+    }
+    return res
+  }
+
+  function needsNormalization (el) {
+    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+  }
+
+  function genNode (node, state) {
+    if (node.type === 1) {
+      return genElement(node, state)
+    } else if (node.type === 3 && node.isComment) {
+      return genComment(node)
+    } else {
+      return genText(node)
+    }
+  }
+
+  function genText (text) {
+    return ("_v(" + (text.type === 2
+      ? text.expression // no need for () because already wrapped in _s()
+      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+  }
+
+  function genComment (comment) {
+    return ("_e(" + (JSON.stringify(comment.text)) + ")")
+  }
+
+  function genSlot (el, state) {
+    var slotName = el.slotName || '"default"';
+    var children = genChildren(el, state);
+    var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+    var attrs = el.attrs || el.dynamicAttrs
+      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+          // slot props are camelized
+          name: camelize(attr.name),
+          value: attr.value,
+          dynamic: attr.dynamic
+        }); }))
+      : null;
+    var bind$$1 = el.attrsMap['v-bind'];
+    if ((attrs || bind$$1) && !children) {
+      res += ",null";
+    }
+    if (attrs) {
+      res += "," + attrs;
+    }
+    if (bind$$1) {
+      res += (attrs ? '' : ',null') + "," + bind$$1;
+    }
+    return res + ')'
+  }
 
-      if (options.chars && text) {
-        options.chars(text);
+  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
+  function genComponent (
+    componentName,
+    el,
+    state
+  ) {
+    var children = el.inlineTemplate ? null : genChildren(el, state, true);
+    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+  }
+
+  function genProps (props) {
+    var staticProps = "";
+    var dynamicProps = "";
+    for (var i = 0; i < props.length; i++) {
+      var prop = props[i];
+      var value = transformSpecialNewlines(prop.value);
+      if (prop.dynamic) {
+        dynamicProps += (prop.name) + "," + value + ",";
+      } else {
+        staticProps += "\"" + (prop.name) + "\":" + value + ",";
       }
+    }
+    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+    if (dynamicProps) {
+      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
     } else {
-      var endTagLength = 0;
-      var stackedTag = lastTag.toLowerCase();
-      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
-        endTagLength = endTag.length;
-        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
-          text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
-            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
-        }
-        if (shouldIgnoreFirstNewline(stackedTag, text)) {
-          text = text.slice(1);
-        }
-        if (options.chars) {
-          options.chars(text);
-        }
-        return ''
-      });
-      index += html.length - rest$1.length;
-      html = rest$1;
-      parseEndTag(stackedTag, index - endTagLength, index);
+      return staticProps
     }
+  }
+
+  // #3895, #4268
+  function transformSpecialNewlines (text) {
+    return text
+      .replace(/\u2028/g, '\\u2028')
+      .replace(/\u2029/g, '\\u2029')
+  }
+
+  /*  */
 
-    if (html === last) {
-      options.chars && options.chars(html);
-      if ("development" !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+
+
+
+  var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
+
+  // let the model AST transform translate v-model into appropriate
+  // props bindings
+  function applyModelTransform (el, state) {
+    if (el.directives) {
+      for (var i = 0; i < el.directives.length; i++) {
+        var dir = el.directives[i];
+        if (dir.name === 'model') {
+          state.directives.model(el, dir, state.warn);
+          // remove value for textarea as its converted to text
+          if (el.tag === 'textarea' && el.props) {
+            el.props = el.props.filter(function (p) { return p.name !== 'value'; });
+          }
+          break
+        }
       }
-      break
     }
   }
 
-  // Clean up any remaining tags
-  parseEndTag();
+  function genAttrSegments (
+    attrs
+  ) {
+    return attrs.map(function (ref) {
+      var name = ref.name;
+      var value = ref.value;
+
+      return genAttrSegment(name, value);
+    })
+  }
 
-  function advance (n) {
-    index += n;
-    html = html.substring(n);
+  function genDOMPropSegments (
+    props,
+    attrs
+  ) {
+    var segments = [];
+    props.forEach(function (ref) {
+      var name = ref.name;
+      var value = ref.value;
+
+      name = propsToAttrMap[name] || name.toLowerCase();
+      if (isRenderableAttr(name) &&
+        !(attrs && attrs.some(function (a) { return a.name === name; }))
+      ) {
+        segments.push(genAttrSegment(name, value));
+      }
+    });
+    return segments
   }
 
-  function parseStartTag () {
-    var start = html.match(startTagOpen);
-    if (start) {
-      var match = {
-        tagName: start[1],
-        attrs: [],
-        start: index
-      };
-      advance(start[0].length);
-      var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
-        advance(attr[0].length);
-        match.attrs.push(attr);
+  function genAttrSegment (name, value) {
+    if (plainStringRE.test(value)) {
+      // force double quote
+      value = value.replace(/^'|'$/g, '"');
+      // force enumerated attr to "true"
+      if (isEnumeratedAttr(name) && value !== "\"false\"") {
+        value = "\"true\"";
       }
-      if (end) {
-        match.unarySlash = end[1];
-        advance(end[0].length);
-        match.end = index;
-        return match
+      return {
+        type: RAW,
+        value: isBooleanAttr(name)
+          ? (" " + name + "=\"" + name + "\"")
+          : value === '""'
+            ? (" " + name)
+            : (" " + name + "=\"" + (JSON.parse(value)) + "\"")
+      }
+    } else {
+      return {
+        type: EXPRESSION,
+        value: ("_ssrAttr(" + (JSON.stringify(name)) + "," + value + ")")
       }
     }
   }
 
-  function handleStartTag (match) {
-    var tagName = match.tagName;
-    var unarySlash = match.unarySlash;
+  function genClassSegments (
+    staticClass,
+    classBinding
+  ) {
+    if (staticClass && !classBinding) {
+      return [{ type: RAW, value: (" class=\"" + (JSON.parse(staticClass)) + "\"") }]
+    } else {
+      return [{
+        type: EXPRESSION,
+        value: ("_ssrClass(" + (staticClass || 'null') + "," + (classBinding || 'null') + ")")
+      }]
+    }
+  }
+
+  function genStyleSegments (
+    staticStyle,
+    parsedStaticStyle,
+    styleBinding,
+    vShowExpression
+  ) {
+    if (staticStyle && !styleBinding && !vShowExpression) {
+      return [{ type: RAW, value: (" style=" + (JSON.stringify(staticStyle))) }]
+    } else {
+      return [{
+        type: EXPRESSION,
+        value: ("_ssrStyle(" + (parsedStaticStyle || 'null') + "," + (styleBinding || 'null') + ", " + (vShowExpression
+            ? ("{ display: (" + vShowExpression + ") ? '' : 'none' }")
+            : 'null') + ")")
+      }]
+    }
+  }
+
+  /*  */
+
+  // optimizability constants
+  var optimizability = {
+    FALSE: 0,    // whole sub tree un-optimizable
+    FULL: 1,     // whole sub tree optimizable
+    SELF: 2,     // self optimizable but has some un-optimizable children
+    CHILDREN: 3, // self un-optimizable but have fully optimizable children
+    PARTIAL: 4   // self un-optimizable with some un-optimizable children
+  };
+
+  var isPlatformReservedTag;
+
+  function optimize (root, options) {
+    if (!root) { return }
+    isPlatformReservedTag = options.isReservedTag || no;
+    walk(root, true);
+  }
 
-    if (expectHTML) {
-      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-        parseEndTag(lastTag);
+  function walk (node, isRoot) {
+    if (isUnOptimizableTree(node)) {
+      node.ssrOptimizability = optimizability.FALSE;
+      return
+    }
+    // root node or nodes with custom directives should always be a VNode
+    var selfUnoptimizable = isRoot || hasCustomDirective(node);
+    var check = function (child) {
+      if (child.ssrOptimizability !== optimizability.FULL) {
+        node.ssrOptimizability = selfUnoptimizable
+          ? optimizability.PARTIAL
+          : optimizability.SELF;
+      }
+    };
+    if (selfUnoptimizable) {
+      node.ssrOptimizability = optimizability.CHILDREN;
+    }
+    if (node.type === 1) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        var child = node.children[i];
+        walk(child);
+        check(child);
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          var block = node.ifConditions[i$1].block;
+          walk(block, isRoot);
+          check(block);
+        }
       }
-      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-        parseEndTag(tagName);
+      if (node.ssrOptimizability == null ||
+        (!isRoot && (node.attrsMap['v-html'] || node.attrsMap['v-text']))
+      ) {
+        node.ssrOptimizability = optimizability.FULL;
+      } else {
+        node.children = optimizeSiblings(node);
       }
+    } else {
+      node.ssrOptimizability = optimizability.FULL;
     }
+  }
 
-    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+  function optimizeSiblings (el) {
+    var children = el.children;
+    var optimizedChildren = [];
+
+    var currentOptimizableGroup = [];
+    var pushGroup = function () {
+      if (currentOptimizableGroup.length) {
+        optimizedChildren.push({
+          type: 1,
+          parent: el,
+          tag: 'template',
+          attrsList: [],
+          attrsMap: {},
+          rawAttrsMap: {},
+          children: currentOptimizableGroup,
+          ssrOptimizability: optimizability.FULL
+        });
+      }
+      currentOptimizableGroup = [];
+    };
 
-    var l = match.attrs.length;
-    var attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (c.ssrOptimizability === optimizability.FULL) {
+        currentOptimizableGroup.push(c);
+      } else {
+        // wrap fully-optimizable adjacent siblings inside a template tag
+        // so that they can be optimized into a single ssrNode by codegen
+        pushGroup();
+        optimizedChildren.push(c);
       }
-      var value = args[3] || args[4] || args[5] || '';
-      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
-        ? options.shouldDecodeNewlinesForHref
-        : options.shouldDecodeNewlines;
-      attrs[i] = {
-        name: args[1],
-        value: decodeAttr(value, shouldDecodeNewlines)
-      };
     }
+    pushGroup();
+    return optimizedChildren
+  }
 
-    if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
-      lastTag = tagName;
+  function isUnOptimizableTree (node) {
+    if (node.type === 2 || node.type === 3) { // text or expression
+      return false
     }
+    return (
+      isBuiltInTag(node.tag) || // built-in (slot, component)
+      !isPlatformReservedTag(node.tag) || // custom component
+      !!node.component || // "is" component
+      isSelectWithModel(node) // <select v-model> requires runtime inspection
+    )
+  }
+
+  var isBuiltInDir = makeMap('text,html,show,on,bind,model,pre,cloak,once');
+
+  function hasCustomDirective (node) {
+    return (
+      node.type === 1 &&
+      node.directives &&
+      node.directives.some(function (d) { return !isBuiltInDir(d.name); })
+    )
+  }
+
+  // <select v-model> cannot be optimized because it requires a runtime check
+  // to determine proper selected option
+  function isSelectWithModel (node) {
+    return (
+      node.type === 1 &&
+      node.tag === 'select' &&
+      node.directives != null &&
+      node.directives.some(function (d) { return d.name === 'model'; })
+    )
+  }
+
+  /*  */
+
 
-    if (options.start) {
-      options.start(tagName, attrs, unary, match.start, match.end);
+
+
+  // segment types
+  var RAW = 0;
+  var INTERPOLATION = 1;
+  var EXPRESSION = 2;
+
+  function generate$1 (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    var code = ast ? genSSRElement(ast, state) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
     }
   }
 
-  function parseEndTag (tagName, start, end) {
-    var pos, lowerCasedTagName;
-    if (start == null) { start = index; }
-    if (end == null) { end = index; }
+  function genSSRElement (el, state) {
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genSSRElement)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state, genSSRElement)
+    } else if (el.tag === 'template' && !el.slotTarget) {
+      return el.ssrOptimizability === optimizability.FULL
+        ? genChildrenAsStringNode(el, state)
+        : genSSRChildren(el, state) || 'void 0'
+    }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
+    switch (el.ssrOptimizability) {
+      case optimizability.FULL:
+        // stringify whole tree
+        return genStringElement(el, state)
+      case optimizability.SELF:
+        // stringify self and check children
+        return genStringElementWithChildren(el, state)
+      case optimizability.CHILDREN:
+        // generate self as VNode and stringify children
+        return genNormalElement(el, state, true)
+      case optimizability.PARTIAL:
+        // generate self as VNode and check children
+        return genNormalElement(el, state, false)
+      default:
+        // bail whole tree
+        return genElement(el, state)
+    }
+  }
+
+  function genNormalElement (el, state, stringifyChildren) {
+    var data = el.plain ? undefined : genData$2(el, state);
+    var children = stringifyChildren
+      ? ("[" + (genChildrenAsStringNode(el, state)) + "]")
+      : genSSRChildren(el, state, true);
+    return ("_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")")
+  }
+
+  function genSSRChildren (el, state, checkSkip) {
+    return genChildren(el, state, checkSkip, genSSRElement, genSSRNode)
+  }
+
+  function genSSRNode (el, state) {
+    return el.type === 1
+      ? genSSRElement(el, state)
+      : genText(el)
+  }
+
+  function genChildrenAsStringNode (el, state) {
+    return el.children.length
+      ? ("_ssrNode(" + (flattenSegments(childrenToSegments(el, state))) + ")")
+      : ''
+  }
+
+  function genStringElement (el, state) {
+    return ("_ssrNode(" + (elementToString(el, state)) + ")")
+  }
+
+  function genStringElementWithChildren (el, state) {
+    var children = genSSRChildren(el, state, true);
+    return ("_ssrNode(" + (flattenSegments(elementToOpenTagSegments(el, state))) + ",\"</" + (el.tag) + ">\"" + (children ? ("," + children) : '') + ")")
+  }
+
+  function elementToString (el, state) {
+    return ("(" + (flattenSegments(elementToSegments(el, state))) + ")")
+  }
+
+  function elementToSegments (el, state) {
+    // v-for / v-if
+    if (el.for && !el.forProcessed) {
+      el.forProcessed = true;
+      return [{
+        type: EXPRESSION,
+        value: genFor(el, state, elementToString, '_ssrList')
+      }]
+    } else if (el.if && !el.ifProcessed) {
+      el.ifProcessed = true;
+      return [{
+        type: EXPRESSION,
+        value: genIf(el, state, elementToString, '"<!---->"')
+      }]
+    } else if (el.tag === 'template') {
+      return childrenToSegments(el, state)
+    }
+
+    var openSegments = elementToOpenTagSegments(el, state);
+    var childrenSegments = childrenToSegments(el, state);
+    var ref = state.options;
+    var isUnaryTag = ref.isUnaryTag;
+    var close = (isUnaryTag && isUnaryTag(el.tag))
+      ? []
+      : [{ type: RAW, value: ("</" + (el.tag) + ">") }];
+    return openSegments.concat(childrenSegments, close)
+  }
+
+  function elementToOpenTagSegments (el, state) {
+    applyModelTransform(el, state);
+    var binding;
+    var segments = [{ type: RAW, value: ("<" + (el.tag)) }];
+    // attrs
+    if (el.attrs) {
+      segments.push.apply(segments, genAttrSegments(el.attrs));
+    }
+    // domProps
+    if (el.props) {
+      segments.push.apply(segments, genDOMPropSegments(el.props, el.attrs));
+    }
+    // v-bind="object"
+    if ((binding = el.attrsMap['v-bind'])) {
+      segments.push({ type: EXPRESSION, value: ("_ssrAttrs(" + binding + ")") });
+    }
+    // v-bind.prop="object"
+    if ((binding = el.attrsMap['v-bind.prop'])) {
+      segments.push({ type: EXPRESSION, value: ("_ssrDOMProps(" + binding + ")") });
+    }
+    // class
+    if (el.staticClass || el.classBinding) {
+      segments.push.apply(
+        segments,
+        genClassSegments(el.staticClass, el.classBinding)
+      );
+    }
+    // style & v-show
+    if (el.staticStyle || el.styleBinding || el.attrsMap['v-show']) {
+      segments.push.apply(
+        segments,
+        genStyleSegments(
+          el.attrsMap.style,
+          el.staticStyle,
+          el.styleBinding,
+          el.attrsMap['v-show']
+        )
+      );
+    }
+    // _scopedId
+    if (state.options.scopeId) {
+      segments.push({ type: RAW, value: (" " + (state.options.scopeId)) });
     }
+    segments.push({ type: RAW, value: ">" });
+    return segments
+  }
 
-    // Find the closest opened tag of the same type
-    if (tagName) {
-      for (pos = stack.length - 1; pos >= 0; pos--) {
-        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
-          break
+  function childrenToSegments (el, state) {
+    var binding;
+    if ((binding = el.attrsMap['v-html'])) {
+      return [{ type: EXPRESSION, value: ("_s(" + binding + ")") }]
+    }
+    if ((binding = el.attrsMap['v-text'])) {
+      return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
+    }
+    if (el.tag === 'textarea' && (binding = el.attrsMap['v-model'])) {
+      return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
+    }
+    return el.children
+      ? nodesToSegments(el.children, state)
+      : []
+  }
+
+  function nodesToSegments (
+    children,
+    state
+  ) {
+    var segments = [];
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (c.type === 1) {
+        segments.push.apply(segments, elementToSegments(c, state));
+      } else if (c.type === 2) {
+        segments.push({ type: INTERPOLATION, value: c.expression });
+      } else if (c.type === 3) {
+        var text = escape(c.text);
+        if (c.isComment) {
+          text = '<!--' + text + '-->';
         }
+        segments.push({ type: RAW, value: text });
       }
-    } else {
-      // If no tag name is provided, clean shop
-      pos = 0;
     }
+    return segments
+  }
 
-    if (pos >= 0) {
-      // Close all the open elements, up the stack
-      for (var i = stack.length - 1; i >= pos; i--) {
-        if ("development" !== 'production' &&
-          (i > pos || !tagName) &&
-          options.warn
-        ) {
-          options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
-          );
-        }
-        if (options.end) {
-          options.end(stack[i].tag, start, end);
-        }
+  function flattenSegments (segments) {
+    var mergedSegments = [];
+    var textBuffer = '';
+
+    var pushBuffer = function () {
+      if (textBuffer) {
+        mergedSegments.push(JSON.stringify(textBuffer));
+        textBuffer = '';
       }
+    };
 
-      // Remove the open elements from the stack
-      stack.length = pos;
-      lastTag = pos && stack[pos - 1].tag;
-    } else if (lowerCasedTagName === 'br') {
-      if (options.start) {
-        options.start(tagName, [], true, start, end);
+    for (var i = 0; i < segments.length; i++) {
+      var s = segments[i];
+      if (s.type === RAW) {
+        textBuffer += s.value;
+      } else if (s.type === INTERPOLATION) {
+        pushBuffer();
+        mergedSegments.push(("_ssrEscape(" + (s.value) + ")"));
+      } else if (s.type === EXPRESSION) {
+        pushBuffer();
+        mergedSegments.push(("(" + (s.value) + ")"));
       }
-    } else if (lowerCasedTagName === 'p') {
-      if (options.start) {
-        options.start(tagName, [], false, start, end);
+    }
+    pushBuffer();
+
+    return mergedSegments.join('+')
+  }
+
+  /*  */
+
+
+
+  // these keywords should not appear inside expressions, but operators like
+  // typeof, instanceof and in are allowed
+  var prohibitedKeywordRE = new RegExp('\\b' + (
+    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+    'super,throw,while,yield,delete,export,import,return,switch,default,' +
+    'extends,finally,continue,debugger,function,arguments'
+  ).split(',').join('\\b|\\b') + '\\b');
+
+  // these unary operators should not be used as property/method names
+  var unaryOperatorsRE = new RegExp('\\b' + (
+    'delete,typeof,void'
+  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+  // strip strings in expressions
+  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+  // detect problematic expressions in a template
+  function detectErrors (ast, warn) {
+    if (ast) {
+      checkNode(ast, warn);
+    }
+  }
+
+  function checkNode (node, warn) {
+    if (node.type === 1) {
+      for (var name in node.attrsMap) {
+        if (dirRE.test(name)) {
+          var value = node.attrsMap[name];
+          if (value) {
+            var range = node.rawAttrsMap[name];
+            if (name === 'v-for') {
+              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+            } else if (name === 'v-slot' || name[0] === '#') {
+              checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+            } else if (onRE.test(name)) {
+              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+            } else {
+              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+            }
+          }
+        }
       }
-      if (options.end) {
-        options.end(tagName, start, end);
+      if (node.children) {
+        for (var i = 0; i < node.children.length; i++) {
+          checkNode(node.children[i], warn);
+        }
       }
+    } else if (node.type === 2) {
+      checkExpression(node.expression, node.text, warn, node);
     }
   }
-}
-
-/*  */
 
-/**
- * Cross-platform code generation for component v-model
- */
-function genComponentModel (
-  el,
-  value,
-  modifiers
-) {
-  var ref = modifiers || {};
-  var number = ref.number;
-  var trim = ref.trim;
+  function checkEvent (exp, text, warn, range) {
+    var stripped = exp.replace(stripStringRE, '');
+    var keywordMatch = stripped.match(unaryOperatorsRE);
+    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+      warn(
+        "avoid using JavaScript unary operator as property name: " +
+        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+        range
+      );
+    }
+    checkExpression(exp, text, warn, range);
+  }
 
-  var baseValueExpression = '$$v';
-  var valueExpression = baseValueExpression;
-  if (trim) {
-    valueExpression =
-      "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
+  function checkFor (node, text, warn, range) {
+    checkExpression(node.for || '', text, warn, range);
+    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
   }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
+
+  function checkIdentifier (
+    ident,
+    type,
+    text,
+    warn,
+    range
+  ) {
+    if (typeof ident === 'string') {
+      try {
+        new Function(("var " + ident + "=_"));
+      } catch (e) {
+        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+      }
+    }
   }
-  var assignment = genAssignmentCode(value, valueExpression);
 
-  el.model = {
-    value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
-    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
-  };
-}
-
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-function genAssignmentCode (
-  value,
-  assignment
-) {
-  var res = parseModel(value);
-  if (res.key === null) {
-    return (value + "=" + assignment)
-  } else {
-    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
-  }
-}
-
-/**
- * Parse a v-model expression into a base path and a final key segment.
- * Handles both dot-path and possible square brackets.
- *
- * Possible cases:
- *
- * - test
- * - test[key]
- * - test[test1[key]]
- * - test["a"][key]
- * - xxx.test[a[a].test1[key]]
- * - test.xxx.a["asa"][test1[key]]
- *
- */
-
-var len;
-var str;
-var chr;
-var index;
-var expressionPos;
-var expressionEndPos;
-
-
-
-function parseModel (val) {
-  len = val.length;
-
-  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
-    index = val.lastIndexOf('.');
-    if (index > -1) {
-      return {
-        exp: val.slice(0, index),
-        key: '"' + val.slice(index + 1) + '"'
+  function checkExpression (exp, text, warn, range) {
+    try {
+      new Function(("return " + exp));
+    } catch (e) {
+      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+      if (keywordMatch) {
+        warn(
+          "avoid using JavaScript keyword as property name: " +
+          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+          range
+        );
+      } else {
+        warn(
+          "invalid expression: " + (e.message) + " in\n\n" +
+          "    " + exp + "\n\n" +
+          "  Raw expression: " + (text.trim()) + "\n",
+          range
+        );
       }
-    } else {
-      return {
-        exp: val,
-        key: null
+    }
+  }
+
+  function checkFunctionParameterExpression (exp, text, warn, range) {
+    try {
+      new Function(exp, '');
+    } catch (e) {
+      warn(
+        "invalid function parameter expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+
+  /*  */
+
+  var range = 2;
+
+  function generateCodeFrame (
+    source,
+    start,
+    end
+  ) {
+    if ( start === void 0 ) start = 0;
+    if ( end === void 0 ) end = source.length;
+
+    var lines = source.split(/\r?\n/);
+    var count = 0;
+    var res = [];
+    for (var i = 0; i < lines.length; i++) {
+      count += lines[i].length + 1;
+      if (count >= start) {
+        for (var j = i - range; j <= i + range || end > count; j++) {
+          if (j < 0 || j >= lines.length) { continue }
+          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+          var lineLength = lines[j].length;
+          if (j === i) {
+            // push underline
+            var pad = start - (count - lineLength) + 1;
+            var length = end > count ? lineLength - pad : end - start;
+            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+          } else if (j > i) {
+            if (end > count) {
+              var length$1 = Math.min(end - count, lineLength);
+              res.push("   |  " + repeat$1("^", length$1));
+            }
+            count += lineLength + 1;
+          }
+        }
+        break
       }
     }
+    return res.join('\n')
   }
 
-  str = val;
-  index = expressionPos = expressionEndPos = 0;
+  function repeat$1 (str, n) {
+    var result = '';
+    if (n > 0) {
+      while (true) { // eslint-disable-line
+        if (n & 1) { result += str; }
+        n >>>= 1;
+        if (n <= 0) { break }
+        str += str;
+      }
+    }
+    return result
+  }
 
-  while (!eof()) {
-    chr = next();
-    /* istanbul ignore if */
-    if (isStringStart(chr)) {
-      parseString(chr);
-    } else if (chr === 0x5B) {
-      parseBracket(chr);
-    }
-  }
+  /*  */
 
-  return {
-    exp: val.slice(0, expressionPos),
-    key: val.slice(expressionPos + 1, expressionEndPos)
-  }
-}
 
-function next () {
-  return str.charCodeAt(++index)
-}
-
-function eof () {
-  return index >= len
-}
-
-function isStringStart (chr) {
-  return chr === 0x22 || chr === 0x27
-}
-
-function parseBracket (chr) {
-  var inBracket = 1;
-  expressionPos = index;
-  while (!eof()) {
-    chr = next();
-    if (isStringStart(chr)) {
-      parseString(chr);
-      continue
-    }
-    if (chr === 0x5B) { inBracket++; }
-    if (chr === 0x5D) { inBracket--; }
-    if (inBracket === 0) {
-      expressionEndPos = index;
-      break
-    }
-  }
-}
 
-function parseString (chr) {
-  var stringQuote = chr;
-  while (!eof()) {
-    chr = next();
-    if (chr === stringQuote) {
-      break
+  function createFunction (code, errors) {
+    try {
+      return new Function(code)
+    } catch (err) {
+      errors.push({ err: err, code: code });
+      return noop
     }
   }
-}
-
-/*  */
-
-var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
-var stripParensRE = /^\(|\)$/g;
-
-var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
-
-var decodeHTMLCached = cached(he.decode);
-
-// configurable state
-var warn$1;
-var delimiters;
-var transforms;
-var preTransforms;
-var postTransforms;
-var platformIsPreTag;
-var platformMustUseProp;
-var platformGetTagNamespace;
-
-
-
-function createASTElement (
-  tag,
-  attrs,
-  parent
-) {
-  return {
-    type: 1,
-    tag: tag,
-    attrsList: attrs,
-    attrsMap: makeAttrsMap(attrs),
-    parent: parent,
-    children: []
-  }
-}
-
-/**
- * Convert HTML string to AST.
- */
-function parse (
-  template,
-  options
-) {
-  warn$1 = options.warn || baseWarn;
 
-  platformIsPreTag = options.isPreTag || no;
-  platformMustUseProp = options.mustUseProp || no;
-  platformGetTagNamespace = options.getTagNamespace || no;
-
-  transforms = pluckModuleFunction(options.modules, 'transformNode');
-  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-  delimiters = options.delimiters;
-
-  var stack = [];
-  var preserveWhitespace = options.preserveWhitespace !== false;
-  var root;
-  var currentParent;
-  var inVPre = false;
-  var inPre = false;
-  var warned = false;
-
-  function warnOnce (msg) {
-    if (!warned) {
-      warned = true;
-      warn$1(msg);
-    }
-  }
-
-  function closeElement (element) {
-    // check pre state
-    if (element.pre) {
-      inVPre = false;
-    }
-    if (platformIsPreTag(element.tag)) {
-      inPre = false;
-    }
-    // apply post-transforms
-    for (var i = 0; i < postTransforms.length; i++) {
-      postTransforms[i](element, options);
-    }
-  }
-
-  parseHTML(template, {
-    warn: warn$1,
-    expectHTML: options.expectHTML,
-    isUnaryTag: options.isUnaryTag,
-    canBeLeftOpenTag: options.canBeLeftOpenTag,
-    shouldDecodeNewlines: options.shouldDecodeNewlines,
-    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
-    shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
-      // check namespace.
-      // inherit parent ns if there is one
-      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
-
-      // handle IE svg bug
-      /* istanbul ignore if */
-      if (isIE && ns === 'svg') {
-        attrs = guardIESVGBug(attrs);
-      }
+  function createCompileToFunctionFn (compile) {
+    var cache = Object.create(null);
 
-      var element = createASTElement(tag, attrs, currentParent);
-      if (ns) {
-        element.ns = ns;
-      }
+    return function compileToFunctions (
+      template,
+      options,
+      vm
+    ) {
+      options = extend({}, options);
+      var warn$$1 = options.warn || warn;
+      delete options.warn;
 
-      if (isForbiddenTag(element) && !isServerRendering()) {
-        element.forbidden = true;
-        "development" !== 'production' && warn$1(
-          'Templates should only be responsible for mapping the state to the ' +
-          'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
-        );
+      /* istanbul ignore if */
+      {
+        // detect possible CSP restriction
+        try {
+          new Function('return 1');
+        } catch (e) {
+          if (e.toString().match(/unsafe-eval|CSP/)) {
+            warn$$1(
+              'It seems you are using the standalone build of Vue.js in an ' +
+              'environment with Content Security Policy that prohibits unsafe-eval. ' +
+              'The template compiler cannot work in this environment. Consider ' +
+              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+              'templates into render functions.'
+            );
+          }
+        }
       }
 
-      // apply pre-transforms
-      for (var i = 0; i < preTransforms.length; i++) {
-        element = preTransforms[i](element, options) || element;
+      // check cache
+      var key = options.delimiters
+        ? String(options.delimiters) + template
+        : template;
+      if (cache[key]) {
+        return cache[key]
       }
 
-      if (!inVPre) {
-        processPre(element);
-        if (element.pre) {
-          inVPre = true;
-        }
-      }
-      if (platformIsPreTag(element.tag)) {
-        inPre = true;
-      }
-      if (inVPre) {
-        processRawAttrs(element);
-      } else if (!element.processed) {
-        // structural directives
-        processFor(element);
-        processIf(element);
-        processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
+      // compile
+      var compiled = compile(template, options);
 
-      function checkRootConstraints (el) {
-        {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
+      // check compilation errors/tips
+      {
+        if (compiled.errors && compiled.errors.length) {
+          if (options.outputSourceRange) {
+            compiled.errors.forEach(function (e) {
+              warn$$1(
+                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+                generateCodeFrame(template, e.start, e.end),
+                vm
+              );
+            });
+          } else {
+            warn$$1(
+              "Error compiling template:\n\n" + template + "\n\n" +
+              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+              vm
             );
           }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
+        }
+        if (compiled.tips && compiled.tips.length) {
+          if (options.outputSourceRange) {
+            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+          } else {
+            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
           }
         }
       }
 
-      // tree management
-      if (!root) {
-        root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
+      // turn code into functions
+      var res = {};
+      var fnGenErrors = [];
+      res.render = createFunction(compiled.render, fnGenErrors);
+      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+        return createFunction(code, fnGenErrors)
+      });
+
+      // check function generation errors.
+      // this should only happen if there is a bug in the compiler itself.
+      // mostly for codegen development use
+      /* istanbul ignore if */
+      {
+        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+          warn$$1(
+            "Failed to generate render function:\n\n" +
+            fnGenErrors.map(function (ref) {
+              var err = ref.err;
+              var code = ref.code;
+
+              return ((err.toString()) + " in\n\n" + code + "\n");
+          }).join('\n'),
+            vm
           );
         }
       }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
-        }
-      }
-      if (!unary) {
-        currentParent = element;
-        stack.push(element);
-      } else {
-        closeElement(element);
-      }
-    },
 
-    end: function end () {
-      // remove trailing whitespace
-      var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
-      // pop stack
-      stack.length -= 1;
-      currentParent = stack[stack.length - 1];
-      closeElement(element);
-    },
+      return (cache[key] = res)
+    }
+  }
 
-    chars: function chars (text) {
-      if (!currentParent) {
-        {
-          if (text === template) {
-            warnOnce(
-              'Component template requires a root element, rather than just text.'
-            );
-          } else if ((text = text.trim())) {
-            warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+  /*  */
+
+  function createCompilerCreator (baseCompile) {
+    return function createCompiler (baseOptions) {
+      function compile (
+        template,
+        options
+      ) {
+        var finalOptions = Object.create(baseOptions);
+        var errors = [];
+        var tips = [];
+
+        var warn = function (msg, range, tip) {
+          (tip ? tips : errors).push(msg);
+        };
+
+        if (options) {
+          if (options.outputSourceRange) {
+            // $flow-disable-line
+            var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+            warn = function (msg, range, tip) {
+              var data = { msg: msg };
+              if (range) {
+                if (range.start != null) {
+                  data.start = range.start + leadingSpaceLength;
+                }
+                if (range.end != null) {
+                  data.end = range.end + leadingSpaceLength;
+                }
+              }
+              (tip ? tips : errors).push(data);
+            };
+          }
+          // merge custom modules
+          if (options.modules) {
+            finalOptions.modules =
+              (baseOptions.modules || []).concat(options.modules);
+          }
+          // merge custom directives
+          if (options.directives) {
+            finalOptions.directives = extend(
+              Object.create(baseOptions.directives || null),
+              options.directives
             );
           }
+          // copy other options
+          for (var key in options) {
+            if (key !== 'modules' && key !== 'directives') {
+              finalOptions[key] = options[key];
+            }
+          }
         }
-        return
-      }
-      // IE textarea placeholder bug
-      /* istanbul ignore if */
-      if (isIE &&
-        currentParent.tag === 'textarea' &&
-        currentParent.attrsMap.placeholder === text
-      ) {
-        return
-      }
-      var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
-      if (text) {
-        var res;
-        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
-            type: 2,
-            expression: res.expression,
-            tokens: res.tokens,
-            text: text
-          });
-        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
-            type: 3,
-            text: text
-          });
+
+        finalOptions.warn = warn;
+
+        var compiled = baseCompile(template.trim(), finalOptions);
+        {
+          detectErrors(compiled.ast, warn);
         }
+        compiled.errors = errors;
+        compiled.tips = tips;
+        return compiled
+      }
+
+      return {
+        compile: compile,
+        compileToFunctions: createCompileToFunctionFn(compile)
       }
-    },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
-    }
-  });
-  return root
-}
-
-function processPre (el) {
-  if (getAndRemoveAttr(el, 'v-pre') != null) {
-    el.pre = true;
-  }
-}
-
-function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
-      };
     }
-  } else if (!el.pre) {
-    // non root node in pre blocks with no attributes
-    el.plain = true;
   }
-}
-
-function processElement (element, options) {
-  processKey(element);
 
-  // determine whether this is a plain element after
-  // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  /*  */
 
-  processRef(element);
-  processSlot(element);
-  processComponent(element);
-  for (var i = 0; i < transforms.length; i++) {
-    element = transforms[i](element, options) || element;
-  }
-  processAttrs(element);
-}
-
-function processKey (el) {
-  var exp = getBindingAttr(el, 'key');
-  if (exp) {
-    if ("development" !== 'production' && el.tag === 'template') {
-      warn$1("<template> cannot be keyed. Place the key on real elements instead.");
+  var createCompiler = createCompilerCreator(function baseCompile (
+    template,
+    options
+  ) {
+    var ast = parse(template.trim(), options);
+    optimize(ast, options);
+    var code = generate$1(ast, options);
+    return {
+      ast: ast,
+      render: code.render,
+      staticRenderFns: code.staticRenderFns
     }
-    el.key = exp;
-  }
-}
-
-function processRef (el) {
-  var ref = getBindingAttr(el, 'ref');
-  if (ref) {
-    el.ref = ref;
-    el.refInFor = checkInFor(el);
-  }
-}
+  });
 
-function processFor (el) {
-  var exp;
-  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    var res = parseFor(exp);
-    if (res) {
-      extend(el, res);
-    } else {
-      warn$1(
-        ("Invalid v-for expression: " + exp)
-      );
+  /*  */
+
+  var ref = createCompiler(baseOptions);
+  var compile = ref.compile;
+  var compileToFunctions = ref.compileToFunctions;
+
+  /*  */
+
+  // The template compiler attempts to minimize the need for normalization by
+  // statically analyzing the template at compile time.
+  //
+  // For plain HTML markup, normalization can be completely skipped because the
+  // generated render function is guaranteed to return Array<VNode>. There are
+  // two cases where extra normalization is needed:
+
+  // 1. When the children contains components - because a functional component
+  // may return an Array instead of a single root. In this case, just a simple
+  // normalization is needed - if any child is an Array, we flatten the whole
+  // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
+  // because functional components already normalize their own children.
+  function simpleNormalizeChildren (children) {
+    for (var i = 0; i < children.length; i++) {
+      if (Array.isArray(children[i])) {
+        return Array.prototype.concat.apply([], children)
+      }
     }
+    return children
   }
-}
 
-function parseFor (exp) {
-  var inMatch = exp.match(forAliasRE);
-  if (!inMatch) { return }
-  var res = {};
-  res.for = inMatch[2].trim();
-  var alias = inMatch[1].trim().replace(stripParensRE, '');
-  var iteratorMatch = alias.match(forIteratorRE);
-  if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
-    res.iterator1 = iteratorMatch[1].trim();
-    if (iteratorMatch[2]) {
-      res.iterator2 = iteratorMatch[2].trim();
-    }
-  } else {
-    res.alias = alias;
-  }
-  return res
-}
-
-function processIf (el) {
-  var exp = getAndRemoveAttr(el, 'v-if');
-  if (exp) {
-    el.if = exp;
-    addIfCondition(el, {
-      exp: exp,
-      block: el
-    });
-  } else {
-    if (getAndRemoveAttr(el, 'v-else') != null) {
-      el.else = true;
-    }
-    var elseif = getAndRemoveAttr(el, 'v-else-if');
-    if (elseif) {
-      el.elseif = elseif;
-    }
+  // 2. When the children contains constructs that always generated nested Arrays,
+  // e.g. <template>, <slot>, v-for, or when the children is provided by user
+  // with hand-written render functions / JSX. In such cases a full normalization
+  // is needed to cater to all possible types of children values.
+  function normalizeChildren (children) {
+    return isPrimitive(children)
+      ? [createTextVNode(children)]
+      : Array.isArray(children)
+        ? normalizeArrayChildren(children)
+        : undefined
   }
-}
 
-function processIfConditions (el, parent) {
-  var prev = findPrevElement(parent.children);
-  if (prev && prev.if) {
-    addIfCondition(prev, {
-      exp: el.elseif,
-      block: el
-    });
-  } else {
-    warn$1(
-      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
-    );
+  function isTextNode (node) {
+    return isDef(node) && isDef(node.text) && isFalse(node.isComment)
   }
-}
 
-function findPrevElement (children) {
-  var i = children.length;
-  while (i--) {
-    if (children[i].type === 1) {
-      return children[i]
-    } else {
-      if ("development" !== 'production' && children[i].text !== ' ') {
-        warn$1(
-          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
-        );
+  function normalizeArrayChildren (children, nestedIndex) {
+    var res = [];
+    var i, c, lastIndex, last;
+    for (i = 0; i < children.length; i++) {
+      c = children[i];
+      if (isUndef(c) || typeof c === 'boolean') { continue }
+      lastIndex = res.length - 1;
+      last = res[lastIndex];
+      //  nested
+      if (Array.isArray(c)) {
+        if (c.length > 0) {
+          c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
+          // merge adjacent text nodes
+          if (isTextNode(c[0]) && isTextNode(last)) {
+            res[lastIndex] = createTextVNode(last.text + (c[0]).text);
+            c.shift();
+          }
+          res.push.apply(res, c);
+        }
+      } else if (isPrimitive(c)) {
+        if (isTextNode(last)) {
+          // merge adjacent text nodes
+          // this is necessary for SSR hydration because text nodes are
+          // essentially merged when rendered to HTML strings
+          res[lastIndex] = createTextVNode(last.text + c);
+        } else if (c !== '') {
+          // convert primitive to vnode
+          res.push(createTextVNode(c));
+        }
+      } else {
+        if (isTextNode(c) && isTextNode(last)) {
+          // merge adjacent text nodes
+          res[lastIndex] = createTextVNode(last.text + c.text);
+        } else {
+          // default key for nested array children (likely generated by v-for)
+          if (isTrue(children._isVList) &&
+            isDef(c.tag) &&
+            isUndef(c.key) &&
+            isDef(nestedIndex)) {
+            c.key = "__vlist" + nestedIndex + "_" + i + "__";
+          }
+          res.push(c);
+        }
       }
-      children.pop();
     }
+    return res
   }
-}
 
-function addIfCondition (el, condition) {
-  if (!el.ifConditions) {
-    el.ifConditions = [];
-  }
-  el.ifConditions.push(condition);
-}
+  /*  */
 
-function processOnce (el) {
-  var once$$1 = getAndRemoveAttr(el, 'v-once');
-  if (once$$1 != null) {
-    el.once = true;
-  }
-}
+  var ssrHelpers = {
+    _ssrEscape: escape,
+    _ssrNode: renderStringNode,
+    _ssrList: renderStringList,
+    _ssrAttr: renderAttr,
+    _ssrAttrs: renderAttrs$1,
+    _ssrDOMProps: renderDOMProps$1,
+    _ssrClass: renderSSRClass,
+    _ssrStyle: renderSSRStyle
+  };
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if ("development" !== 'production' && el.key) {
-      warn$1(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
-      );
+  function installSSRHelpers (vm) {
+    if (vm._ssrNode) {
+      return
     }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if ("development" !== 'production' && slotScope) {
-        warn$1(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
-      }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if ("development" !== 'production' && el.attrsMap['v-for']) {
-        warn$1(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
-      }
-      el.slotScope = slotScope;
+    var Vue = vm.constructor;
+    while (Vue.super) {
+      Vue = Vue.super;
     }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
+    extend(Vue.prototype, ssrHelpers);
+    if (Vue.FunctionalRenderContext) {
+      extend(Vue.FunctionalRenderContext.prototype, ssrHelpers);
     }
   }
-}
 
-function processComponent (el) {
-  var binding;
-  if ((binding = getBindingAttr(el, 'is'))) {
-    el.component = binding;
-  }
-  if (getAndRemoveAttr(el, 'inline-template') != null) {
-    el.inlineTemplate = true;
+  var StringNode = function StringNode (
+    open,
+    close,
+    children,
+    normalizationType
+  ) {
+    this.isString = true;
+    this.open = open;
+    this.close = close;
+    if (children) {
+      this.children = normalizationType === 1
+        ? simpleNormalizeChildren(children)
+        : normalizationType === 2
+          ? normalizeChildren(children)
+          : children;
+    } else {
+      this.children = void 0;
+    }
+  };
+
+  function renderStringNode (
+    open,
+    close,
+    children,
+    normalizationType
+  ) {
+    return new StringNode(open, close, children, normalizationType)
   }
-}
 
-function processAttrs (el) {
-  var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
-  for (i = 0, l = list.length; i < l; i++) {
-    name = rawName = list[i].name;
-    value = list[i].value;
-    if (dirRE.test(name)) {
-      // mark element as dynamic
-      el.hasBindings = true;
-      // modifiers
-      modifiers = parseModifiers(name);
-      if (modifiers) {
-        name = name.replace(modifierRE, '');
-      }
-      if (bindRE.test(name)) { // v-bind
-        name = name.replace(bindRE, '');
-        value = parseFilters(value);
-        isProp = false;
-        if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
-            name = camelize(name);
-            if (name === 'innerHtml') { name = 'innerHTML'; }
-          }
-          if (modifiers.camel) {
-            name = camelize(name);
-          }
-          if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
-          }
-        }
-        if (isProp || (
-          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
-        )) {
-          addProp(el, name, value);
-        } else {
-          addAttr(el, name, value);
-        }
-      } else if (onRE.test(name)) { // v-on
-        name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$1);
-      } else { // normal directives
-        name = name.replace(dirRE, '');
-        // parse arg
-        var argMatch = name.match(argRE);
-        var arg = argMatch && argMatch[1];
-        if (arg) {
-          name = name.slice(0, -(arg.length + 1));
-        }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if ("development" !== 'production' && name === 'model') {
-          checkForAliasModel(el, value);
-        }
+  function renderStringList (
+    val,
+    render
+  ) {
+    var ret = '';
+    var i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      for (i = 0, l = val.length; i < l; i++) {
+        ret += render(val[i], i);
       }
-    } else {
-      // literal attribute
-      {
-        var res = parseText(value, delimiters);
-        if (res) {
-          warn$1(
-            name + "=\"" + value + "\": " +
-            'Interpolation inside attributes has been removed. ' +
-            'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
-          );
-        }
+    } else if (typeof val === 'number') {
+      for (i = 0; i < val; i++) {
+        ret += render(i + 1, i);
       }
-      addAttr(el, name, JSON.stringify(value));
-      // #6887 firefox doesn't update muted state if set via attribute
-      // even immediately after element creation
-      if (!el.component &&
-          name === 'muted' &&
-          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+    } else if (isObject(val)) {
+      keys = Object.keys(val);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret += render(val[key], key, i);
       }
     }
-  }
-}
-
-function checkInFor (el) {
-  var parent = el;
-  while (parent) {
-    if (parent.for !== undefined) {
-      return true
-    }
-    parent = parent.parent;
-  }
-  return false
-}
-
-function parseModifiers (name) {
-  var match = name.match(modifierRE);
-  if (match) {
-    var ret = {};
-    match.forEach(function (m) { ret[m.slice(1)] = true; });
     return ret
   }
-}
 
-function makeAttrsMap (attrs) {
-  var map = {};
-  for (var i = 0, l = attrs.length; i < l; i++) {
-    if (
-      "development" !== 'production' &&
-      map[attrs[i].name] && !isIE && !isEdge
-    ) {
-      warn$1('duplicate attribute: ' + attrs[i].name);
-    }
-    map[attrs[i].name] = attrs[i].value;
-  }
-  return map
-}
-
-// for script (e.g. type="x/template") or style, do not decode content
-function isTextTag (el) {
-  return el.tag === 'script' || el.tag === 'style'
-}
-
-function isForbiddenTag (el) {
-  return (
-    el.tag === 'style' ||
-    (el.tag === 'script' && (
-      !el.attrsMap.type ||
-      el.attrsMap.type === 'text/javascript'
-    ))
-  )
-}
-
-var ieNSBug = /^xmlns:NS\d+/;
-var ieNSPrefix = /^NS\d+:/;
-
-/* istanbul ignore next */
-function guardIESVGBug (attrs) {
-  var res = [];
-  for (var i = 0; i < attrs.length; i++) {
-    var attr = attrs[i];
-    if (!ieNSBug.test(attr.name)) {
-      attr.name = attr.name.replace(ieNSPrefix, '');
-      res.push(attr);
-    }
-  }
-  return res
-}
-
-function checkForAliasModel (el, value) {
-  var _el = el;
-  while (_el) {
-    if (_el.for && _el.alias === value) {
-      warn$1(
-        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-        "You are binding v-model directly to a v-for iteration alias. " +
-        "This will not be able to modify the v-for source array because " +
-        "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
-      );
+  function renderAttrs$1 (obj) {
+    var res = '';
+    for (var key in obj) {
+      if (isSSRUnsafeAttr(key)) {
+        continue
+      }
+      res += renderAttr(key, obj[key]);
     }
-    _el = _el.parent;
-  }
-}
-
-/*  */
-
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
-function preTransformNode (el, options) {
-  if (el.tag === 'input') {
-    var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
-      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
-      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
-      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
-      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
-      // 1. checkbox
-      var branch0 = cloneASTElement(el);
-      // process for on the main node
-      processFor(branch0);
-      addRawAttr(branch0, 'type', 'checkbox');
-      processElement(branch0, options);
-      branch0.processed = true; // prevent it from double-processed
-      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
-      addIfCondition(branch0, {
-        exp: branch0.if,
-        block: branch0
-      });
-      // 2. add radio else-if condition
-      var branch1 = cloneASTElement(el);
-      getAndRemoveAttr(branch1, 'v-for', true);
-      addRawAttr(branch1, 'type', 'radio');
-      processElement(branch1, options);
-      addIfCondition(branch0, {
-        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
-        block: branch1
-      });
-      // 3. other
-      var branch2 = cloneASTElement(el);
-      getAndRemoveAttr(branch2, 'v-for', true);
-      addRawAttr(branch2, ':type', typeBinding);
-      processElement(branch2, options);
-      addIfCondition(branch0, {
-        exp: ifCondition,
-        block: branch2
-      });
+    return res
+  }
 
-      if (hasElse) {
-        branch0.else = true;
-      } else if (elseIfCondition) {
-        branch0.elseif = elseIfCondition;
+  function renderDOMProps$1 (obj) {
+    var res = '';
+    for (var key in obj) {
+      var attr = propsToAttrMap[key] || key.toLowerCase();
+      if (isRenderableAttr(attr)) {
+        res += renderAttr(attr, obj[key]);
       }
-
-      return branch0
     }
+    return res
   }
-}
-
-function cloneASTElement (el) {
-  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
-}
-
-var model$1 = {
-  preTransformNode: preTransformNode
-};
-
-var modules$1 = [
-  klass,
-  style,
-  model$1
-];
 
-/*  */
+  function renderSSRClass (
+    staticClass,
+    dynamic
+  ) {
+    var res = renderClass(staticClass, dynamic);
+    return res === '' ? res : (" class=\"" + (escape(res)) + "\"")
+  }
 
-var warn$2;
+  function renderSSRStyle (
+    staticStyle,
+    dynamic,
+    extra
+  ) {
+    var style = {};
+    if (staticStyle) { extend(style, staticStyle); }
+    if (dynamic) { extend(style, normalizeStyleBinding(dynamic)); }
+    if (extra) { extend(style, extra); }
+    var res = genStyle(style);
+    return res === '' ? res : (" style=" + (JSON.stringify(escape(res))))
+  }
 
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
+  /* not type checking this file because flow doesn't play well with Proxy */
 
+  {
+    var allowedGlobals = makeMap(
+      'Infinity,undefined,NaN,isFinite,isNaN,' +
+      'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
+      'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
+      'require' // for Webpack/Browserify
+    );
 
-function model$2 (
-  el,
-  dir,
-  _warn
-) {
-  warn$2 = _warn;
-  var value = dir.value;
-  var modifiers = dir.modifiers;
-  var tag = el.tag;
-  var type = el.attrsMap.type;
+    var hasProxy =
+      typeof Proxy !== 'undefined' && isNative(Proxy);
 
-  {
-    // inputs with type="file" are read only and setting the input's
-    // value will throw an error.
-    if (tag === 'input' && type === 'file') {
-      warn$2(
-        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
-      );
+    if (hasProxy) {
+      var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
+      config.keyCodes = new Proxy(config.keyCodes, {
+        set: function set (target, key, value) {
+          if (isBuiltInModifier(key)) {
+            warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
+            return false
+          } else {
+            target[key] = value;
+            return true
+          }
+        }
+      });
     }
   }
 
-  if (el.component) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else if (tag === 'select') {
-    genSelect(el, value, modifiers);
-  } else if (tag === 'input' && type === 'checkbox') {
-    genCheckboxModel(el, value, modifiers);
-  } else if (tag === 'input' && type === 'radio') {
-    genRadioModel(el, value, modifiers);
-  } else if (tag === 'input' || tag === 'textarea') {
-    genDefaultModel(el, value, modifiers);
-  } else if (!config.isReservedTag(tag)) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else {
-    warn$2(
-      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-      "v-model is not supported on this element type. " +
-      'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
-    );
-  }
+  /*  */
 
-  // ensure runtime directive metadata
-  return true
-}
-
-function genCheckboxModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
-  addProp(el, 'checked',
-    "Array.isArray(" + value + ")" +
-    "?_i(" + value + "," + valueBinding + ")>-1" + (
-      trueValueBinding === 'true'
-        ? (":(" + value + ")")
-        : (":_q(" + value + "," + trueValueBinding + ")")
-    )
-  );
-  addHandler(el, 'change',
-    "var $$a=" + value + "," +
-        '$$el=$event.target,' +
-        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
-    'if(Array.isArray($$a)){' +
-      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
-          '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
-    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
-    null, true
-  );
-}
-
-function genRadioModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
-  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
-  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-}
-
-function genSelect (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var selectedVal = "Array.prototype.filter" +
-    ".call($event.target.options,function(o){return o.selected})" +
-    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
-    "return " + (number ? '_n(val)' : 'val') + "})";
-
-  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-  var code = "var $$selectedVal = " + selectedVal + ";";
-  code = code + " " + (genAssignmentCode(value, assignment));
-  addHandler(el, 'change', code, null, true);
-}
-
-function genDefaultModel (
-  el,
-  value,
-  modifiers
-) {
-  var type = el.attrsMap.type;
-
-  // warn if v-bind:value conflicts with v-model
-  {
-    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
-      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
-      warn$2(
-        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
-      );
-    }
+  var seenObjects = new _Set();
+
+  /**
+   * Recursively traverse an object to evoke all converted
+   * getters, so that every nested property inside the object
+   * is collected as a "deep" dependency.
+   */
+  function traverse (val) {
+    _traverse(val, seenObjects);
+    seenObjects.clear();
   }
 
-  var ref = modifiers || {};
-  var lazy = ref.lazy;
-  var number = ref.number;
-  var trim = ref.trim;
-  var needCompositionGuard = !lazy && type !== 'range';
-  var event = lazy
-    ? 'change'
-    : type === 'range'
-      ? RANGE_TOKEN
-      : 'input';
-
-  var valueExpression = '$event.target.value';
-  if (trim) {
-    valueExpression = "$event.target.value.trim()";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
-  }
-
-  var code = genAssignmentCode(value, valueExpression);
-  if (needCompositionGuard) {
-    code = "if($event.target.composing)return;" + code;
-  }
-
-  addProp(el, 'value', ("(" + value + ")"));
-  addHandler(el, event, code, null, true);
-  if (trim || number) {
-    addHandler(el, 'blur', '$forceUpdate()');
-  }
-}
-
-/*  */
-
-function text (el, dir) {
-  if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-/*  */
-
-function html (el, dir) {
-  if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-var directives$1 = {
-  model: model$2,
-  text: text,
-  html: html
-};
-
-/*  */
-
-var baseOptions = {
-  expectHTML: true,
-  modules: modules$1,
-  directives: directives$1,
-  isPreTag: isPreTag,
-  isUnaryTag: isUnaryTag,
-  mustUseProp: mustUseProp,
-  canBeLeftOpenTag: canBeLeftOpenTag,
-  isReservedTag: isReservedTag,
-  getTagNamespace: getTagNamespace,
-  staticKeys: genStaticKeys(modules$1)
-};
-
-/*  */
-
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
-
-// keyCode aliases
-var keyCodes = {
-  esc: 27,
-  tab: 9,
-  enter: 13,
-  space: 32,
-  up: 38,
-  left: 37,
-  right: 39,
-  down: 40,
-  'delete': [8, 46]
-};
-
-// #4868: modifiers that prevent the execution of the listener
-// need to explicitly return null so that we can determine whether to remove
-// the listener for .once
-var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
-
-var modifierCode = {
-  stop: '$event.stopPropagation();',
-  prevent: '$event.preventDefault();',
-  self: genGuard("$event.target !== $event.currentTarget"),
-  ctrl: genGuard("!$event.ctrlKey"),
-  shift: genGuard("!$event.shiftKey"),
-  alt: genGuard("!$event.altKey"),
-  meta: genGuard("!$event.metaKey"),
-  left: genGuard("'button' in $event && $event.button !== 0"),
-  middle: genGuard("'button' in $event && $event.button !== 1"),
-  right: genGuard("'button' in $event && $event.button !== 2")
-};
-
-function genHandlers (
-  events,
-  isNative,
-  warn
-) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
-  for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
-  }
-  return res.slice(0, -1) + '}'
-}
-
-function genHandler (
-  name,
-  handler
-) {
-  if (!handler) {
-    return 'function(){}'
-  }
-
-  if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
-  }
-
-  var isMethodPath = simplePathRE.test(handler.value);
-  var isFunctionExpression = fnExpRE.test(handler.value);
-
-  if (!handler.modifiers) {
-    if (isMethodPath || isFunctionExpression) {
-      return handler.value
+  function _traverse (val, seen) {
+    var i, keys;
+    var isA = Array.isArray(val);
+    if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+      return
     }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
-  } else {
-    var code = '';
-    var genModifierCode = '';
-    var keys = [];
-    for (var key in handler.modifiers) {
-      if (modifierCode[key]) {
-        genModifierCode += modifierCode[key];
-        // left/right
-        if (keyCodes[key]) {
-          keys.push(key);
-        }
-      } else if (key === 'exact') {
-        var modifiers = (handler.modifiers);
-        genModifierCode += genGuard(
-          ['ctrl', 'shift', 'alt', 'meta']
-            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
-            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
-            .join('||')
-        );
-      } else {
-        keys.push(key);
+    if (val.__ob__) {
+      var depId = val.__ob__.dep.id;
+      if (seen.has(depId)) {
+        return
       }
+      seen.add(depId);
     }
-    if (keys.length) {
-      code += genKeyFilter(keys);
-    }
-    // Make sure modifiers like prevent and stop get executed after key filtering
-    if (genModifierCode) {
-      code += genModifierCode;
+    if (isA) {
+      i = val.length;
+      while (i--) { _traverse(val[i], seen); }
+    } else {
+      keys = Object.keys(val);
+      i = keys.length;
+      while (i--) { _traverse(val[keys[i]], seen); }
     }
-    var handlerCode = isMethodPath
-      ? handler.value + '($event)'
-      : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
-    return ("function($event){" + code + handlerCode + "}")
   }
-}
-
-function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
-}
 
-function genFilterCode (key) {
-  var keyVal = parseInt(key, 10);
-  if (keyVal) {
-    return ("$event.keyCode!==" + keyVal)
-  }
-  var code = keyCodes[key];
-  return (
-    "_k($event.keyCode," +
-    (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
-  )
-}
+  {
+    var perf = inBrowser && window.performance;
+    /* istanbul ignore if */
+    if (
+      perf &&
+      perf.mark &&
+      perf.measure &&
+      perf.clearMarks &&
+      perf.clearMeasures
+    ) ;
+  }
+
+  /*  */
+
+  var normalizeEvent = cached(function (name) {
+    var passive = name.charAt(0) === '&';
+    name = passive ? name.slice(1) : name;
+    var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
+    name = once$$1 ? name.slice(1) : name;
+    var capture = name.charAt(0) === '!';
+    name = capture ? name.slice(1) : name;
+    return {
+      name: name,
+      once: once$$1,
+      capture: capture,
+      passive: passive
+    }
+  });
 
-/*  */
+  function createFnInvoker (fns, vm) {
+    function invoker () {
+      var arguments$1 = arguments;
 
-function on (el, dir) {
-  if ("development" !== 'production' && dir.modifiers) {
-    warn("v-on without argument does not support modifiers.");
+      var fns = invoker.fns;
+      if (Array.isArray(fns)) {
+        var cloned = fns.slice();
+        for (var i = 0; i < cloned.length; i++) {
+          invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
+        }
+      } else {
+        // return handler return value for single handlers
+        return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
+      }
+    }
+    invoker.fns = fns;
+    return invoker
   }
-  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
-}
-
-/*  */
 
-function bind$1 (el, dir) {
-  el.wrapData = function (code) {
-    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
-  };
-}
-
-/*  */
-
-var baseDirectives = {
-  on: on,
-  bind: bind$1,
-  cloak: noop
-};
-
-/*  */
-
-var CodegenState = function CodegenState (options) {
-  this.options = options;
-  this.warn = options.warn || baseWarn;
-  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
-  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
-  this.directives = extend(extend({}, baseDirectives), options.directives);
-  var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
-  this.onceId = 0;
-  this.staticRenderFns = [];
-};
-
-
-
-function generate$1 (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genElement (el, state) {
-  if (el.staticRoot && !el.staticProcessed) {
-    return genStatic(el, state)
-  } else if (el.once && !el.onceProcessed) {
-    return genOnce(el, state)
-  } else if (el.for && !el.forProcessed) {
-    return genFor(el, state)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return genChildren(el, state) || 'void 0'
-  } else if (el.tag === 'slot') {
-    return genSlot(el, state)
-  } else {
-    // component or element
-    var code;
-    if (el.component) {
-      code = genComponent(el.component, el, state);
-    } else {
-      var data = el.plain ? undefined : genData$2(el, state);
-
-      var children = el.inlineTemplate ? null : genChildren(el, state, true);
-      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
-    }
-    // module transforms
-    for (var i = 0; i < state.transforms.length; i++) {
-      code = state.transforms[i](el, code);
-    }
-    return code
-  }
-}
-
-// hoist static sub-trees out
-function genStatic (el, state) {
-  el.staticProcessed = true;
-  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
-  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
-}
-
-// v-once
-function genOnce (el, state) {
-  el.onceProcessed = true;
-  if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.staticInFor) {
-    var key = '';
-    var parent = el.parent;
-    while (parent) {
-      if (parent.for) {
-        key = parent.key;
-        break
+  function updateListeners (
+    on,
+    oldOn,
+    add,
+    remove$$1,
+    createOnceHandler,
+    vm
+  ) {
+    var name, def$$1, cur, old, event;
+    for (name in on) {
+      def$$1 = cur = on[name];
+      old = oldOn[name];
+      event = normalizeEvent(name);
+      if (isUndef(cur)) {
+        warn(
+          "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
+          vm
+        );
+      } else if (isUndef(old)) {
+        if (isUndef(cur.fns)) {
+          cur = on[name] = createFnInvoker(cur, vm);
+        }
+        if (isTrue(event.once)) {
+          cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+        }
+        add(event.name, cur, event.capture, event.passive, event.params);
+      } else if (cur !== old) {
+        old.fns = cur;
+        on[name] = old;
       }
-      parent = parent.parent;
     }
-    if (!key) {
-      "development" !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
-      );
-      return genElement(el, state)
+    for (name in oldOn) {
+      if (isUndef(on[name])) {
+        event = normalizeEvent(name);
+        remove$$1(event.name, oldOn[name], event.capture);
+      }
     }
-    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
-  } else {
-    return genStatic(el, state)
-  }
-}
-
-function genIf (
-  el,
-  state,
-  altGen,
-  altEmpty
-) {
-  el.ifProcessed = true; // avoid recursion
-  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
-}
-
-function genIfConditions (
-  conditions,
-  state,
-  altGen,
-  altEmpty
-) {
-  if (!conditions.length) {
-    return altEmpty || '_e()'
-  }
-
-  var condition = conditions.shift();
-  if (condition.exp) {
-    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
-  } else {
-    return ("" + (genTernaryExp(condition.block)))
-  }
-
-  // v-if with v-once should generate code like (a)?_m(0):_m(1)
-  function genTernaryExp (el) {
-    return altGen
-      ? altGen(el, state)
-      : el.once
-        ? genOnce(el, state)
-        : genElement(el, state)
-  }
-}
-
-function genFor (
-  el,
-  state,
-  altGen,
-  altHelper
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-
-  if ("development" !== 'production' &&
-    state.maybeComponent(el) &&
-    el.tag !== 'slot' &&
-    el.tag !== 'template' &&
-    !el.key
-  ) {
-    state.warn(
-      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
-      "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
-      true /* tip */
-    );
   }
 
-  el.forProcessed = true; // avoid recursion
-  return (altHelper || '_l') + "((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + ((altGen || genElement)(el, state)) +
-    '})'
-}
-
-function genData$2 (el, state) {
-  var data = '{';
+  /*  */
 
-  // directives first.
-  // directives may mutate the el's other properties before they are generated.
-  var dirs = genDirectives(el, state);
-  if (dirs) { data += dirs + ','; }
-
-  // key
-  if (el.key) {
-    data += "key:" + (el.key) + ",";
-  }
-  // ref
-  if (el.ref) {
-    data += "ref:" + (el.ref) + ",";
-  }
-  if (el.refInFor) {
-    data += "refInFor:true,";
-  }
-  // pre
-  if (el.pre) {
-    data += "pre:true,";
-  }
-  // record original tag name for components using "is" attribute
-  if (el.component) {
-    data += "tag:\"" + (el.tag) + "\",";
-  }
-  // module data generation functions
-  for (var i = 0; i < state.dataGenFns.length; i++) {
-    data += state.dataGenFns[i](el);
-  }
-  // attributes
-  if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
-  }
-  // DOM props
-  if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
-  }
-  // event handlers
-  if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
-  }
-  if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
-  }
-  // slot target
-  // only for non-scoped slots
-  if (el.slotTarget && !el.slotScope) {
-    data += "slot:" + (el.slotTarget) + ",";
-  }
-  // scoped slots
-  if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
-  }
-  // component v-model
-  if (el.model) {
-    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
-  }
-  // inline-template
-  if (el.inlineTemplate) {
-    var inlineTemplate = genInlineTemplate(el, state);
-    if (inlineTemplate) {
-      data += inlineTemplate + ",";
-    }
-  }
-  data = data.replace(/,$/, '') + '}';
-  // v-bind data wrap
-  if (el.wrapData) {
-    data = el.wrapData(data);
-  }
-  // v-on data wrap
-  if (el.wrapListeners) {
-    data = el.wrapListeners(data);
-  }
-  return data
-}
-
-function genDirectives (el, state) {
-  var dirs = el.directives;
-  if (!dirs) { return }
-  var res = 'directives:[';
-  var hasRuntime = false;
-  var i, l, dir, needRuntime;
-  for (i = 0, l = dirs.length; i < l; i++) {
-    dir = dirs[i];
-    needRuntime = true;
-    var gen = state.directives[dir.name];
-    if (gen) {
-      // compile-time directive that manipulates AST.
-      // returns true if it also needs a runtime counterpart.
-      needRuntime = !!gen(el, dir, state.warn);
-    }
-    if (needRuntime) {
-      hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
-    }
-  }
-  if (hasRuntime) {
-    return res.slice(0, -1) + ']'
-  }
-}
-
-function genInlineTemplate (el, state) {
-  var ast = el.children[0];
-  if ("development" !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
-  }
-  if (ast.type === 1) {
-    var inlineRenderFns = generate$1(ast, state.options);
-    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
-  }
-}
-
-function genScopedSlots (
-  slots,
-  state
-) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
-}
-
-function genScopedSlot (
-  key,
-  el,
-  state
-) {
-  if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
-  }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
-    "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
-        : genChildren(el, state) || 'undefined'
-      : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
-}
-
-function genChildren (
-  el,
-  state,
-  checkSkip,
-  altGenElement,
-  altGenNode
-) {
-  var children = el.children;
-  if (children.length) {
-    var el$1 = children[0];
-    // optimize single v-for
-    if (children.length === 1 &&
-      el$1.for &&
-      el$1.tag !== 'template' &&
-      el$1.tag !== 'slot'
-    ) {
-      return (altGenElement || genElement)(el$1, state)
-    }
-    var normalizationType = checkSkip
-      ? getNormalizationType(children, state.maybeComponent)
-      : 0;
-    var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
-  }
-}
-
-// determine the normalization needed for the children array.
-// 0: no normalization needed
-// 1: simple normalization needed (possible 1-level deep nested array)
-// 2: full normalization needed
-function getNormalizationType (
-  children,
-  maybeComponent
-) {
-  var res = 0;
-  for (var i = 0; i < children.length; i++) {
-    var el = children[i];
-    if (el.type !== 1) {
-      continue
-    }
-    if (needsNormalization(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
-      res = 2;
-      break
-    }
-    if (maybeComponent(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
-      res = 1;
-    }
-  }
-  return res
-}
-
-function needsNormalization (el) {
-  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
-}
-
-function genNode (node, state) {
-  if (node.type === 1) {
-    return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
-    return genComment(node)
-  } else {
-    return genText(node)
-  }
-}
-
-function genText (text) {
-  return ("_v(" + (text.type === 2
-    ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
-}
-
-function genComment (comment) {
-  return ("_e(" + (JSON.stringify(comment.text)) + ")")
-}
-
-function genSlot (el, state) {
-  var slotName = el.slotName || '"default"';
-  var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
-  var bind$$1 = el.attrsMap['v-bind'];
-  if ((attrs || bind$$1) && !children) {
-    res += ",null";
-  }
-  if (attrs) {
-    res += "," + attrs;
-  }
-  if (bind$$1) {
-    res += (attrs ? '' : ',null') + "," + bind$$1;
-  }
-  return res + ')'
-}
-
-// componentName is el.component, take it as argument to shun flow's pessimistic refinement
-function genComponent (
-  componentName,
-  el,
-  state
-) {
-  var children = el.inlineTemplate ? null : genChildren(el, state, true);
-  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
-}
-
-function genProps (props) {
-  var res = '';
-  for (var i = 0; i < props.length; i++) {
-    var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+  /*  */
+
+  function extractPropsFromVNodeData (
+    data,
+    Ctor,
+    tag
+  ) {
+    // we are only extracting raw values here.
+    // validation and default values are handled in the child
+    // component itself.
+    var propOptions = Ctor.options.props;
+    if (isUndef(propOptions)) {
+      return
     }
+    var res = {};
+    var attrs = data.attrs;
+    var props = data.props;
+    if (isDef(attrs) || isDef(props)) {
+      for (var key in propOptions) {
+        var altKey = hyphenate(key);
+        {
+          var keyInLowerCase = key.toLowerCase();
+          if (
+            key !== keyInLowerCase &&
+            attrs && hasOwn(attrs, keyInLowerCase)
+          ) {
+            tip(
+              "Prop \"" + keyInLowerCase + "\" is passed to component " +
+              (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
+              " \"" + key + "\". " +
+              "Note that HTML attributes are case-insensitive and camelCased " +
+              "props need to use their kebab-case equivalents when using in-DOM " +
+              "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
+            );
+          }
+        }
+        checkProp(res, props, key, altKey, true) ||
+        checkProp(res, attrs, key, altKey, false);
+      }
+    }
+    return res
   }
-  return res.slice(0, -1)
-}
 
-// #3895, #4268
-function transformSpecialNewlines (text) {
-  return text
-    .replace(/\u2028/g, '\\u2028')
-    .replace(/\u2029/g, '\\u2029')
-}
-
-/*  */
-
-var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
-
-// let the model AST transform translate v-model into appropriate
-// props bindings
-function applyModelTransform (el, state) {
-  if (el.directives) {
-    for (var i = 0; i < el.directives.length; i++) {
-      var dir = el.directives[i];
-      if (dir.name === 'model') {
-        state.directives.model(el, dir, state.warn);
-        // remove value for textarea as its converted to text
-        if (el.tag === 'textarea' && el.props) {
-          el.props = el.props.filter(function (p) { return p.name !== 'value'; });
+  function checkProp (
+    res,
+    hash,
+    key,
+    altKey,
+    preserve
+  ) {
+    if (isDef(hash)) {
+      if (hasOwn(hash, key)) {
+        res[key] = hash[key];
+        if (!preserve) {
+          delete hash[key];
         }
-        break
+        return true
+      } else if (hasOwn(hash, altKey)) {
+        res[key] = hash[altKey];
+        if (!preserve) {
+          delete hash[altKey];
+        }
+        return true
       }
     }
+    return false
   }
-}
-
-function genAttrSegments (
-  attrs
-) {
-  return attrs.map(function (ref) {
-    var name = ref.name;
-    var value = ref.value;
 
-    return genAttrSegment(name, value);
-  })
-}
+  /*  */
 
-function genDOMPropSegments (
-  props,
-  attrs
-) {
-  var segments = [];
-  props.forEach(function (ref) {
-    var name = ref.name;
-    var value = ref.value;
+  var SIMPLE_NORMALIZE = 1;
+  var ALWAYS_NORMALIZE = 2;
 
-    name = propsToAttrMap[name] || name.toLowerCase();
-    if (isRenderableAttr(name) &&
-      !(attrs && attrs.some(function (a) { return a.name === name; }))
-    ) {
-      segments.push(genAttrSegment(name, value));
-    }
-  });
-  return segments
-}
-
-function genAttrSegment (name, value) {
-  if (plainStringRE.test(value)) {
-    // force double quote
-    value = value.replace(/^'|'$/g, '"');
-    // force enumerated attr to "true"
-    if (isEnumeratedAttr(name) && value !== "\"false\"") {
-      value = "\"true\"";
-    }
-    return {
-      type: RAW,
-      value: isBooleanAttr(name)
-        ? (" " + name + "=\"" + name + "\"")
-        : value === '""'
-          ? (" " + name)
-          : (" " + name + "=\"" + (JSON.parse(value)) + "\"")
+  // wrapper function for providing a more flexible interface
+  // without getting yelled at by flow
+  function createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType,
+    alwaysNormalize
+  ) {
+    if (Array.isArray(data) || isPrimitive(data)) {
+      normalizationType = children;
+      children = data;
+      data = undefined;
     }
-  } else {
-    return {
-      type: EXPRESSION,
-      value: ("_ssrAttr(" + (JSON.stringify(name)) + "," + value + ")")
+    if (isTrue(alwaysNormalize)) {
+      normalizationType = ALWAYS_NORMALIZE;
     }
+    return _createElement(context, tag, data, children, normalizationType)
   }
-}
 
-function genClassSegments (
-  staticClass,
-  classBinding
-) {
-  if (staticClass && !classBinding) {
-    return [{ type: RAW, value: (" class=" + staticClass) }]
-  } else {
-    return [{
-      type: EXPRESSION,
-      value: ("_ssrClass(" + (staticClass || 'null') + "," + (classBinding || 'null') + ")")
-    }]
-  }
-}
-
-function genStyleSegments (
-  staticStyle,
-  parsedStaticStyle,
-  styleBinding,
-  vShowExpression
-) {
-  if (staticStyle && !styleBinding && !vShowExpression) {
-    return [{ type: RAW, value: (" style=" + (JSON.stringify(staticStyle))) }]
-  } else {
-    return [{
-      type: EXPRESSION,
-      value: ("_ssrStyle(" + (parsedStaticStyle || 'null') + "," + (styleBinding || 'null') + ", " + (vShowExpression
-          ? ("{ display: (" + vShowExpression + ") ? '' : 'none' }")
-          : 'null') + ")")
-    }]
-  }
-}
-
-/*  */
-
-/**
- * In SSR, the vdom tree is generated only once and never patched, so
- * we can optimize most element / trees into plain string render functions.
- * The SSR optimizer walks the AST tree to detect optimizable elements and trees.
- *
- * The criteria for SSR optimizability is quite a bit looser than static tree
- * detection (which is designed for client re-render). In SSR we bail only for
- * components/slots/custom directives.
- */
-
-// optimizability constants
-var optimizability = {
-  FALSE: 0,    // whole sub tree un-optimizable
-  FULL: 1,     // whole sub tree optimizable
-  SELF: 2,     // self optimizable but has some un-optimizable children
-  CHILDREN: 3, // self un-optimizable but have fully optimizable children
-  PARTIAL: 4   // self un-optimizable with some un-optimizable children
-};
-
-var isPlatformReservedTag;
-
-function optimize (root, options) {
-  if (!root) { return }
-  isPlatformReservedTag = options.isReservedTag || no;
-  walk(root, true);
-}
-
-function walk (node, isRoot) {
-  if (isUnOptimizableTree(node)) {
-    node.ssrOptimizability = optimizability.FALSE;
-    return
-  }
-  // root node or nodes with custom directives should always be a VNode
-  var selfUnoptimizable = isRoot || hasCustomDirective(node);
-  var check = function (child) {
-    if (child.ssrOptimizability !== optimizability.FULL) {
-      node.ssrOptimizability = selfUnoptimizable
-        ? optimizability.PARTIAL
-        : optimizability.SELF;
+  function _createElement (
+    context,
+    tag,
+    data,
+    children,
+    normalizationType
+  ) {
+    if (isDef(data) && isDef((data).__ob__)) {
+      warn(
+        "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+        'Always create fresh vnode data objects in each render!',
+        context
+      );
+      return createEmptyVNode()
     }
-  };
-  if (selfUnoptimizable) {
-    node.ssrOptimizability = optimizability.CHILDREN;
-  }
-  if (node.type === 1) {
-    for (var i = 0, l = node.children.length; i < l; i++) {
-      var child = node.children[i];
-      walk(child);
-      check(child);
+    // object syntax in v-bind
+    if (isDef(data) && isDef(data.is)) {
+      tag = data.is;
     }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        var block = node.ifConditions[i$1].block;
-        walk(block, isRoot);
-        check(block);
+    if (!tag) {
+      // in case of component :is set to falsy value
+      return createEmptyVNode()
+    }
+    // warn against non-primitive key
+    if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+    ) {
+      {
+        warn(
+          'Avoid using non-primitive value as key, ' +
+          'use string/number value instead.',
+          context
+        );
       }
     }
-    if (node.ssrOptimizability == null ||
-      (!isRoot && (node.attrsMap['v-html'] || node.attrsMap['v-text']))
+    // support single function children as default scoped slot
+    if (Array.isArray(children) &&
+      typeof children[0] === 'function'
     ) {
-      node.ssrOptimizability = optimizability.FULL;
+      data = data || {};
+      data.scopedSlots = { default: children[0] };
+      children.length = 0;
+    }
+    if (normalizationType === ALWAYS_NORMALIZE) {
+      children = normalizeChildren(children);
+    } else if (normalizationType === SIMPLE_NORMALIZE) {
+      children = simpleNormalizeChildren(children);
+    }
+    var vnode, ns;
+    if (typeof tag === 'string') {
+      var Ctor;
+      ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+      if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+        // component
+        vnode = createComponent(Ctor, data, context, children, tag);
+      } else {
+        // unknown or unlisted namespaced elements
+        // check at runtime because it may get assigned a namespace when its
+        // parent normalizes children
+        vnode = new VNode(
+          tag, data, children,
+          undefined, undefined, context
+        );
+      }
     } else {
-      node.children = optimizeSiblings(node);
-    }
-  } else {
-    node.ssrOptimizability = optimizability.FULL;
-  }
-}
-
-function optimizeSiblings (el) {
-  var children = el.children;
-  var optimizedChildren = [];
-
-  var currentOptimizableGroup = [];
-  var pushGroup = function () {
-    if (currentOptimizableGroup.length) {
-      optimizedChildren.push({
-        type: 1,
-        parent: el,
-        tag: 'template',
-        attrsList: [],
-        attrsMap: {},
-        children: currentOptimizableGroup,
-        ssrOptimizability: optimizability.FULL
-      });
+      // direct component options / constructor
+      vnode = createComponent(tag, data, context, children);
     }
-    currentOptimizableGroup = [];
-  };
-
-  for (var i = 0; i < children.length; i++) {
-    var c = children[i];
-    if (c.ssrOptimizability === optimizability.FULL) {
-      currentOptimizableGroup.push(c);
+    if (Array.isArray(vnode)) {
+      return vnode
+    } else if (isDef(vnode)) {
+      if (isDef(ns)) { applyNS(vnode, ns); }
+      if (isDef(data)) { registerDeepBindings(data); }
+      return vnode
     } else {
-      // wrap fully-optimizable adjacent siblings inside a template tag
-      // so that they can be optimized into a single ssrNode by codegen
-      pushGroup();
-      optimizedChildren.push(c);
+      return createEmptyVNode()
     }
   }
-  pushGroup();
-  return optimizedChildren
-}
 
-function isUnOptimizableTree (node) {
-  if (node.type === 2 || node.type === 3) { // text or expression
-    return false
-  }
-  return (
-    isBuiltInTag(node.tag) || // built-in (slot, component)
-    !isPlatformReservedTag(node.tag) || // custom component
-    !!node.component || // "is" component
-    isSelectWithModel(node) // <select v-model> requires runtime inspection
-  )
-}
-
-var isBuiltInDir = makeMap('text,html,show,on,bind,model,pre,cloak,once');
-
-function hasCustomDirective (node) {
-  return (
-    node.type === 1 &&
-    node.directives &&
-    node.directives.some(function (d) { return !isBuiltInDir(d.name); })
-  )
-}
-
-// <select v-model> cannot be optimized because it requires a runtime check
-// to determine proper selected option
-function isSelectWithModel (node) {
-  return (
-    node.type === 1 &&
-    node.tag === 'select' &&
-    node.directives != null &&
-    node.directives.some(function (d) { return d.name === 'model'; })
-  )
-}
-
-/*  */
-
-// The SSR codegen is essentially extending the default codegen to handle
-// SSR-optimizable nodes and turn them into string render fns. In cases where
-// a node is not optimizable it simply falls back to the default codegen.
-
-// segment types
-var RAW = 0;
-var INTERPOLATION = 1;
-var EXPRESSION = 2;
-
-function generate (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genSSRElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genSSRElement (el, state) {
-  if (el.for && !el.forProcessed) {
-    return genFor(el, state, genSSRElement)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state, genSSRElement)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return el.ssrOptimizability === optimizability.FULL
-      ? genChildrenAsStringNode(el, state)
-      : genSSRChildren(el, state) || 'void 0'
-  }
-
-  switch (el.ssrOptimizability) {
-    case optimizability.FULL:
-      // stringify whole tree
-      return genStringElement(el, state)
-    case optimizability.SELF:
-      // stringify self and check children
-      return genStringElementWithChildren(el, state)
-    case optimizability.CHILDREN:
-      // generate self as VNode and stringify children
-      return genNormalElement(el, state, true)
-    case optimizability.PARTIAL:
-      // generate self as VNode and check children
-      return genNormalElement(el, state, false)
-    default:
-      // bail whole tree
-      return genElement(el, state)
-  }
-}
-
-function genNormalElement (el, state, stringifyChildren) {
-  var data = el.plain ? undefined : genData$2(el, state);
-  var children = stringifyChildren
-    ? ("[" + (genChildrenAsStringNode(el, state)) + "]")
-    : genSSRChildren(el, state, true);
-  return ("_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")")
-}
-
-function genSSRChildren (el, state, checkSkip) {
-  return genChildren(el, state, checkSkip, genSSRElement, genSSRNode)
-}
-
-function genSSRNode (el, state) {
-  return el.type === 1
-    ? genSSRElement(el, state)
-    : genText(el)
-}
-
-function genChildrenAsStringNode (el, state) {
-  return el.children.length
-    ? ("_ssrNode(" + (flattenSegments(childrenToSegments(el, state))) + ")")
-    : ''
-}
-
-function genStringElement (el, state) {
-  return ("_ssrNode(" + (elementToString(el, state)) + ")")
-}
-
-function genStringElementWithChildren (el, state) {
-  var children = genSSRChildren(el, state, true);
-  return ("_ssrNode(" + (flattenSegments(elementToOpenTagSegments(el, state))) + ",\"</" + (el.tag) + ">\"" + (children ? ("," + children) : '') + ")")
-}
-
-function elementToString (el, state) {
-  return ("(" + (flattenSegments(elementToSegments(el, state))) + ")")
-}
-
-function elementToSegments (el, state) {
-  // v-for / v-if
-  if (el.for && !el.forProcessed) {
-    el.forProcessed = true;
-    return [{
-      type: EXPRESSION,
-      value: genFor(el, state, elementToString, '_ssrList')
-    }]
-  } else if (el.if && !el.ifProcessed) {
-    el.ifProcessed = true;
-    return [{
-      type: EXPRESSION,
-      value: genIf(el, state, elementToString, '"<!---->"')
-    }]
-  } else if (el.tag === 'template') {
-    return childrenToSegments(el, state)
-  }
-
-  var openSegments = elementToOpenTagSegments(el, state);
-  var childrenSegments = childrenToSegments(el, state);
-  var ref = state.options;
-  var isUnaryTag = ref.isUnaryTag;
-  var close = (isUnaryTag && isUnaryTag(el.tag))
-    ? []
-    : [{ type: RAW, value: ("</" + (el.tag) + ">") }];
-  return openSegments.concat(childrenSegments, close)
-}
-
-function elementToOpenTagSegments (el, state) {
-  applyModelTransform(el, state);
-  var binding;
-  var segments = [{ type: RAW, value: ("<" + (el.tag)) }];
-  // attrs
-  if (el.attrs) {
-    segments.push.apply(segments, genAttrSegments(el.attrs));
-  }
-  // domProps
-  if (el.props) {
-    segments.push.apply(segments, genDOMPropSegments(el.props, el.attrs));
-  }
-  // v-bind="object"
-  if ((binding = el.attrsMap['v-bind'])) {
-    segments.push({ type: EXPRESSION, value: ("_ssrAttrs(" + binding + ")") });
-  }
-  // v-bind.prop="object"
-  if ((binding = el.attrsMap['v-bind.prop'])) {
-    segments.push({ type: EXPRESSION, value: ("_ssrDOMProps(" + binding + ")") });
-  }
-  // class
-  if (el.staticClass || el.classBinding) {
-    segments.push.apply(
-      segments,
-      genClassSegments(el.staticClass, el.classBinding)
-    );
-  }
-  // style & v-show
-  if (el.staticStyle || el.styleBinding || el.attrsMap['v-show']) {
-    segments.push.apply(
-      segments,
-      genStyleSegments(
-        el.attrsMap.style,
-        el.staticStyle,
-        el.styleBinding,
-        el.attrsMap['v-show']
-      )
-    );
-  }
-  // _scopedId
-  if (state.options.scopeId) {
-    segments.push({ type: RAW, value: (" " + (state.options.scopeId)) });
-  }
-  segments.push({ type: RAW, value: ">" });
-  return segments
-}
-
-function childrenToSegments (el, state) {
-  var binding;
-  if ((binding = el.attrsMap['v-html'])) {
-    return [{ type: EXPRESSION, value: ("_s(" + binding + ")") }]
-  }
-  if ((binding = el.attrsMap['v-text'])) {
-    return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
-  }
-  if (el.tag === 'textarea' && (binding = el.attrsMap['v-model'])) {
-    return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
-  }
-  return el.children
-    ? nodesToSegments(el.children, state)
-    : []
-}
-
-function nodesToSegments (
-  children,
-  state
-) {
-  var segments = [];
-  for (var i = 0; i < children.length; i++) {
-    var c = children[i];
-    if (c.type === 1) {
-      segments.push.apply(segments, elementToSegments(c, state));
-    } else if (c.type === 2) {
-      segments.push({ type: INTERPOLATION, value: c.expression });
-    } else if (c.type === 3) {
-      segments.push({ type: RAW, value: escape(c.text) });
-    }
-  }
-  return segments
-}
-
-function flattenSegments (segments) {
-  var mergedSegments = [];
-  var textBuffer = '';
-
-  var pushBuffer = function () {
-    if (textBuffer) {
-      mergedSegments.push(JSON.stringify(textBuffer));
-      textBuffer = '';
+  function applyNS (vnode, ns, force) {
+    vnode.ns = ns;
+    if (vnode.tag === 'foreignObject') {
+      // use default namespace inside foreignObject
+      ns = undefined;
+      force = true;
     }
-  };
-
-  for (var i = 0; i < segments.length; i++) {
-    var s = segments[i];
-    if (s.type === RAW) {
-      textBuffer += s.value;
-    } else if (s.type === INTERPOLATION) {
-      pushBuffer();
-      mergedSegments.push(("_ssrEscape(" + (s.value) + ")"));
-    } else if (s.type === EXPRESSION) {
-      pushBuffer();
-      mergedSegments.push(("(" + (s.value) + ")"));
-    }
-  }
-  pushBuffer();
-
-  return mergedSegments.join('+')
-}
-
-/*  */
-
-// these keywords should not appear inside expressions, but operators like
-// typeof, instanceof and in are allowed
-var prohibitedKeywordRE = new RegExp('\\b' + (
-  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
-  'super,throw,while,yield,delete,export,import,return,switch,default,' +
-  'extends,finally,continue,debugger,function,arguments'
-).split(',').join('\\b|\\b') + '\\b');
-
-// these unary operators should not be used as property/method names
-var unaryOperatorsRE = new RegExp('\\b' + (
-  'delete,typeof,void'
-).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
-
-// strip strings in expressions
-var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
-
-// detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
-  if (ast) {
-    checkNode(ast, errors);
-  }
-  return errors
-}
-
-function checkNode (node, errors) {
-  if (node.type === 1) {
-    for (var name in node.attrsMap) {
-      if (dirRE.test(name)) {
-        var value = node.attrsMap[name];
-        if (value) {
-          if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
-          } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
-          } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
-          }
+    if (isDef(vnode.children)) {
+      for (var i = 0, l = vnode.children.length; i < l; i++) {
+        var child = vnode.children[i];
+        if (isDef(child.tag) && (
+          isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+          applyNS(child, ns, force);
         }
       }
     }
-    if (node.children) {
-      for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
-      }
-    }
-  } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
   }
-}
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
-      "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
-    );
-  }
-  checkExpression(exp, text, errors);
-}
-
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
-}
-
-function checkIdentifier (
-  ident,
-  type,
-  text,
-  errors
-) {
-  if (typeof ident === 'string') {
-    try {
-      new Function(("var " + ident + "=_"));
-    } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+  // ref #5318
+  // necessary to ensure parent re-render when deep bindings like :style and
+  // :class are used on slot nodes
+  function registerDeepBindings (data) {
+    if (isObject(data.style)) {
+      traverse(data.style);
     }
-  }
-}
-
-function checkExpression (exp, text, errors) {
-  try {
-    new Function(("return " + exp));
-  } catch (e) {
-    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-    if (keywordMatch) {
-      errors.push(
-        "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
-      );
-    } else {
-      errors.push(
-        "invalid expression: " + (e.message) + " in\n\n" +
-        "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
-      );
+    if (isObject(data.class)) {
+      traverse(data.class);
     }
   }
-}
 
-/*  */
+  /*  */
 
-function createFunction (code, errors) {
-  try {
-    return new Function(code)
-  } catch (err) {
-    errors.push({ err: err, code: code });
-    return noop
+  /**
+   * Runtime helper for rendering v-for lists.
+   */
+  function renderList (
+    val,
+    render
+  ) {
+    var ret, i, l, keys, key;
+    if (Array.isArray(val) || typeof val === 'string') {
+      ret = new Array(val.length);
+      for (i = 0, l = val.length; i < l; i++) {
+        ret[i] = render(val[i], i);
+      }
+    } else if (typeof val === 'number') {
+      ret = new Array(val);
+      for (i = 0; i < val; i++) {
+        ret[i] = render(i + 1, i);
+      }
+    } else if (isObject(val)) {
+      if (hasSymbol && val[Symbol.iterator]) {
+        ret = [];
+        var iterator = val[Symbol.iterator]();
+        var result = iterator.next();
+        while (!result.done) {
+          ret.push(render(result.value, ret.length));
+          result = iterator.next();
+        }
+      } else {
+        keys = Object.keys(val);
+        ret = new Array(keys.length);
+        for (i = 0, l = keys.length; i < l; i++) {
+          key = keys[i];
+          ret[i] = render(val[key], key, i);
+        }
+      }
+    }
+    if (!isDef(ret)) {
+      ret = [];
+    }
+    (ret)._isVList = true;
+    return ret
   }
-}
 
-function createCompileToFunctionFn (compile) {
-  var cache = Object.create(null);
+  /*  */
 
-  return function compileToFunctions (
-    template,
-    options,
-    vm
+  /**
+   * Runtime helper for rendering <slot>
+   */
+  function renderSlot (
+    name,
+    fallbackRender,
+    props,
+    bindObject
   ) {
-    options = extend({}, options);
-    var warn$$1 = options.warn || warn;
-    delete options.warn;
-
-    /* istanbul ignore if */
-    {
-      // detect possible CSP restriction
-      try {
-        new Function('return 1');
-      } catch (e) {
-        if (e.toString().match(/unsafe-eval|CSP/)) {
-          warn$$1(
-            'It seems you are using the standalone build of Vue.js in an ' +
-            'environment with Content Security Policy that prohibits unsafe-eval. ' +
-            'The template compiler cannot work in this environment. Consider ' +
-            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
-            'templates into render functions.'
-          );
+    var scopedSlotFn = this.$scopedSlots[name];
+    var nodes;
+    if (scopedSlotFn) {
+      // scoped slot
+      props = props || {};
+      if (bindObject) {
+        if (!isObject(bindObject)) {
+          warn('slot v-bind without argument expects an Object', this);
         }
+        props = extend(extend({}, bindObject), props);
       }
+      nodes =
+        scopedSlotFn(props) ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+    } else {
+      nodes =
+        this.$slots[name] ||
+        (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
     }
 
-    // check cache
-    var key = options.delimiters
-      ? String(options.delimiters) + template
-      : template;
-    if (cache[key]) {
-      return cache[key]
+    var target = props && props.slot;
+    if (target) {
+      return this.$createElement('template', { slot: target }, nodes)
+    } else {
+      return nodes
     }
+  }
 
-    // compile
-    var compiled = compile(template, options);
+  /*  */
 
-    // check compilation errors/tips
-    {
-      if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
-      }
-      if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
-      }
-    }
+  /**
+   * Runtime helper for resolving filters
+   */
+  function resolveFilter (id) {
+    return resolveAsset(this.$options, 'filters', id, true) || identity
+  }
 
-    // turn code into functions
-    var res = {};
-    var fnGenErrors = [];
-    res.render = createFunction(compiled.render, fnGenErrors);
-    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
-      return createFunction(code, fnGenErrors)
-    });
+  /*  */
 
-    // check function generation errors.
-    // this should only happen if there is a bug in the compiler itself.
-    // mostly for codegen development use
-    /* istanbul ignore if */
-    {
-      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
-        warn$$1(
-          "Failed to generate render function:\n\n" +
-          fnGenErrors.map(function (ref) {
-            var err = ref.err;
-            var code = ref.code;
-
-            return ((err.toString()) + " in\n\n" + code + "\n");
-        }).join('\n'),
-          vm
-        );
-      }
+  function isKeyNotMatch (expect, actual) {
+    if (Array.isArray(expect)) {
+      return expect.indexOf(actual) === -1
+    } else {
+      return expect !== actual
     }
-
-    return (cache[key] = res)
   }
-}
 
-/*  */
+  /**
+   * Runtime helper for checking keyCodes from config.
+   * exposed as Vue.prototype._k
+   * passing in eventKeyName as last argument separately for backwards compat
+   */
+  function checkKeyCodes (
+    eventKeyCode,
+    key,
+    builtInKeyCode,
+    eventKeyName,
+    builtInKeyName
+  ) {
+    var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+    if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+      return isKeyNotMatch(builtInKeyName, eventKeyName)
+    } else if (mappedKeyCode) {
+      return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+    } else if (eventKeyName) {
+      return hyphenate(eventKeyName) !== key
+    }
+    return eventKeyCode === undefined
+  }
 
-function createCompilerCreator (baseCompile) {
-  return function createCompiler (baseOptions) {
-    function compile (
-      template,
-      options
-    ) {
-      var finalOptions = Object.create(baseOptions);
-      var errors = [];
-      var tips = [];
-      finalOptions.warn = function (msg, tip) {
-        (tip ? tips : errors).push(msg);
-      };
+  /*  */
 
-      if (options) {
-        // merge custom modules
-        if (options.modules) {
-          finalOptions.modules =
-            (baseOptions.modules || []).concat(options.modules);
-        }
-        // merge custom directives
-        if (options.directives) {
-          finalOptions.directives = extend(
-            Object.create(baseOptions.directives || null),
-            options.directives
-          );
+  /**
+   * Runtime helper for merging v-bind="object" into a VNode's data.
+   */
+  function bindObjectProps (
+    data,
+    tag,
+    value,
+    asProp,
+    isSync
+  ) {
+    if (value) {
+      if (!isObject(value)) {
+        warn(
+          'v-bind without argument expects an Object or Array value',
+          this
+        );
+      } else {
+        if (Array.isArray(value)) {
+          value = toObject(value);
         }
-        // copy other options
-        for (var key in options) {
-          if (key !== 'modules' && key !== 'directives') {
-            finalOptions[key] = options[key];
+        var hash;
+        var loop = function ( key ) {
+          if (
+            key === 'class' ||
+            key === 'style' ||
+            isReservedAttribute(key)
+          ) {
+            hash = data;
+          } else {
+            var type = data.attrs && data.attrs.type;
+            hash = asProp || config.mustUseProp(tag, type, key)
+              ? data.domProps || (data.domProps = {})
+              : data.attrs || (data.attrs = {});
           }
-        }
-      }
+          var camelizedKey = camelize(key);
+          var hyphenatedKey = hyphenate(key);
+          if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+            hash[key] = value[key];
+
+            if (isSync) {
+              var on = data.on || (data.on = {});
+              on[("update:" + key)] = function ($event) {
+                value[key] = $event;
+              };
+            }
+          }
+        };
 
-      var compiled = baseCompile(template, finalOptions);
-      {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        for (var key in value) loop( key );
       }
-      compiled.errors = errors;
-      compiled.tips = tips;
-      return compiled
     }
+    return data
+  }
 
-    return {
-      compile: compile,
-      compileToFunctions: createCompileToFunctionFn(compile)
-    }
-  }
-}
-
-/*  */
-
-var createCompiler = createCompilerCreator(function baseCompile (
-  template,
-  options
-) {
-  var ast = parse(template.trim(), options);
-  optimize(ast, options);
-  var code = generate(ast, options);
-  return {
-    ast: ast,
-    render: code.render,
-    staticRenderFns: code.staticRenderFns
-  }
-});
-
-/*  */
-
-var ref = createCompiler(baseOptions);
-var compileToFunctions = ref.compileToFunctions;
-
-/*  */
-
-// The template compiler attempts to minimize the need for normalization by
-// statically analyzing the template at compile time.
-//
-// For plain HTML markup, normalization can be completely skipped because the
-// generated render function is guaranteed to return Array<VNode>. There are
-// two cases where extra normalization is needed:
-
-// 1. When the children contains components - because a functional component
-// may return an Array instead of a single root. In this case, just a simple
-// normalization is needed - if any child is an Array, we flatten the whole
-// thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
-// because functional components already normalize their own children.
-function simpleNormalizeChildren (children) {
-  for (var i = 0; i < children.length; i++) {
-    if (Array.isArray(children[i])) {
-      return Array.prototype.concat.apply([], children)
-    }
-  }
-  return children
-}
-
-// 2. When the children contains constructs that always generated nested Arrays,
-// e.g. <template>, <slot>, v-for, or when the children is provided by user
-// with hand-written render functions / JSX. In such cases a full normalization
-// is needed to cater to all possible types of children values.
-function normalizeChildren (children) {
-  return isPrimitive(children)
-    ? [createTextVNode(children)]
-    : Array.isArray(children)
-      ? normalizeArrayChildren(children)
-      : undefined
-}
-
-function isTextNode (node) {
-  return isDef(node) && isDef(node.text) && isFalse(node.isComment)
-}
-
-function normalizeArrayChildren (children, nestedIndex) {
-  var res = [];
-  var i, c, lastIndex, last;
-  for (i = 0; i < children.length; i++) {
-    c = children[i];
-    if (isUndef(c) || typeof c === 'boolean') { continue }
-    lastIndex = res.length - 1;
-    last = res[lastIndex];
-    //  nested
-    if (Array.isArray(c)) {
-      if (c.length > 0) {
-        c = normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i));
-        // merge adjacent text nodes
-        if (isTextNode(c[0]) && isTextNode(last)) {
-          res[lastIndex] = createTextVNode(last.text + (c[0]).text);
-          c.shift();
-        }
-        res.push.apply(res, c);
-      }
-    } else if (isPrimitive(c)) {
-      if (isTextNode(last)) {
-        // merge adjacent text nodes
-        // this is necessary for SSR hydration because text nodes are
-        // essentially merged when rendered to HTML strings
-        res[lastIndex] = createTextVNode(last.text + c);
-      } else if (c !== '') {
-        // convert primitive to vnode
-        res.push(createTextVNode(c));
+  /*  */
+
+  /**
+   * Runtime helper for rendering static trees.
+   */
+  function renderStatic (
+    index,
+    isInFor
+  ) {
+    var cached = this._staticTrees || (this._staticTrees = []);
+    var tree = cached[index];
+    // if has already-rendered static tree and not inside v-for,
+    // we can reuse the same tree.
+    if (tree && !isInFor) {
+      return tree
+    }
+    // otherwise, render a fresh tree.
+    tree = cached[index] = this.$options.staticRenderFns[index].call(
+      this._renderProxy,
+      null,
+      this // for render fns generated for functional component templates
+    );
+    markStatic(tree, ("__static__" + index), false);
+    return tree
+  }
+
+  /**
+   * Runtime helper for v-once.
+   * Effectively it means marking the node as static with a unique key.
+   */
+  function markOnce (
+    tree,
+    index,
+    key
+  ) {
+    markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+    return tree
+  }
+
+  function markStatic (
+    tree,
+    key,
+    isOnce
+  ) {
+    if (Array.isArray(tree)) {
+      for (var i = 0; i < tree.length; i++) {
+        if (tree[i] && typeof tree[i] !== 'string') {
+          markStaticNode(tree[i], (key + "_" + i), isOnce);
+        }
       }
     } else {
-      if (isTextNode(c) && isTextNode(last)) {
-        // merge adjacent text nodes
-        res[lastIndex] = createTextVNode(last.text + c.text);
+      markStaticNode(tree, key, isOnce);
+    }
+  }
+
+  function markStaticNode (node, key, isOnce) {
+    node.isStatic = true;
+    node.key = key;
+    node.isOnce = isOnce;
+  }
+
+  /*  */
+
+  function bindObjectListeners (data, value) {
+    if (value) {
+      if (!isPlainObject(value)) {
+        warn(
+          'v-on without argument expects an Object value',
+          this
+        );
       } else {
-        // default key for nested array children (likely generated by v-for)
-        if (isTrue(children._isVList) &&
-          isDef(c.tag) &&
-          isUndef(c.key) &&
-          isDef(nestedIndex)) {
-          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        var on = data.on = data.on ? extend({}, data.on) : {};
+        for (var key in value) {
+          var existing = on[key];
+          var ours = value[key];
+          on[key] = existing ? [].concat(existing, ours) : ours;
         }
-        res.push(c);
       }
     }
+    return data
   }
-  return res
-}
 
-/*  */
+  /*  */
 
-function installSSRHelpers (vm) {
-  if (vm._ssrNode) { return }
-  var Ctor = vm.constructor;
-  while (Ctor.super) {
-    Ctor = Ctor.super;
+  function resolveScopedSlots (
+    fns, // see flow/vnode
+    res,
+    // the following are added in 2.6
+    hasDynamicKeys,
+    contentHashKey
+  ) {
+    res = res || { $stable: !hasDynamicKeys };
+    for (var i = 0; i < fns.length; i++) {
+      var slot = fns[i];
+      if (Array.isArray(slot)) {
+        resolveScopedSlots(slot, res, hasDynamicKeys);
+      } else if (slot) {
+        // marker for reverse proxying v-slot without scope on this.$slots
+        if (slot.proxy) {
+          slot.fn.proxy = true;
+        }
+        res[slot.key] = slot.fn;
+      }
+    }
+    if (contentHashKey) {
+      (res).$key = contentHashKey;
+    }
+    return res
   }
-  extend(Ctor.prototype, {
-    _ssrEscape: escape,
-    _ssrNode: renderStringNode$1,
-    _ssrList: renderStringList,
-    _ssrAttr: renderAttr,
-    _ssrAttrs: renderAttrs$1,
-    _ssrDOMProps: renderDOMProps$1,
-    _ssrClass: renderSSRClass,
-    _ssrStyle: renderSSRStyle
-  });
-}
-
-var StringNode = function StringNode (
-  open,
-  close,
-  children,
-  normalizationType
-) {
-  this.isString = true;
-  this.open = open;
-  this.close = close;
-  if (children) {
-    this.children = normalizationType === 1
-      ? simpleNormalizeChildren(children)
-      : normalizationType === 2
-        ? normalizeChildren(children)
-        : children;
-  } else {
-    this.children = void 0;
-  }
-};
-
-function renderStringNode$1 (
-  open,
-  close,
-  children,
-  normalizationType
-) {
-  return new StringNode(open, close, children, normalizationType)
-}
-
-function renderStringList (
-  val,
-  render
-) {
-  var ret = '';
-  var i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    for (i = 0, l = val.length; i < l; i++) {
-      ret += render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    for (i = 0; i < val; i++) {
-      ret += render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret += render(val[key], key, i);
-    }
-  }
-  return ret
-}
-
-function renderAttrs$1 (obj) {
-  var res = '';
-  for (var key in obj) {
-    res += renderAttr(key, obj[key]);
-  }
-  return res
-}
-
-function renderDOMProps$1 (obj) {
-  var res = '';
-  for (var key in obj) {
-    var attr = propsToAttrMap[key] || key.toLowerCase();
-    if (isRenderableAttr(attr)) {
-      res += renderAttr(attr, obj[key]);
-    }
-  }
-  return res
-}
-
-function renderSSRClass (
-  staticClass,
-  dynamic
-) {
-  var res = renderClass$1(staticClass, dynamic);
-  return res === '' ? res : (" class=\"" + (escape(res)) + "\"")
-}
-
-function renderSSRStyle (
-  staticStyle,
-  dynamic,
-  extra
-) {
-  var style = {};
-  if (staticStyle) { extend(style, staticStyle); }
-  if (dynamic) { extend(style, normalizeStyleBinding(dynamic)); }
-  if (extra) { extend(style, extra); }
-  var res = genStyle(style);
-  return res === '' ? res : (" style=" + (JSON.stringify(escape(res))))
-}
-
-/* not type checking this file because flow doesn't play well with Proxy */
-
-{
-  var allowedGlobals = makeMap(
-    'Infinity,undefined,NaN,isFinite,isNaN,' +
-    'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
-    'require' // for Webpack/Browserify
-  );
 
-  var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+  /*  */
 
-  if (hasProxy) {
-    var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
-    config.keyCodes = new Proxy(config.keyCodes, {
-      set: function set (target, key, value) {
-        if (isBuiltInModifier(key)) {
-          warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key));
-          return false
-        } else {
-          target[key] = value;
-          return true
-        }
+  function bindDynamicKeys (baseObj, values) {
+    for (var i = 0; i < values.length; i += 2) {
+      var key = values[i];
+      if (typeof key === 'string' && key) {
+        baseObj[values[i]] = values[i + 1];
+      } else if (key !== '' && key !== null) {
+        // null is a special value for explicitly removing a binding
+        warn(
+          ("Invalid value for dynamic directive argument (expected string or null): " + key),
+          this
+        );
       }
-    });
+    }
+    return baseObj
   }
 
-  
-}
-
-/*  */
-
-var seenObjects = new _Set();
+  // helper to dynamically append modifier runtime markers to event names.
+  // ensure only append when value is already string, otherwise it will be cast
+  // to string and cause the type check to miss.
+  function prependModifier (value, symbol) {
+    return typeof value === 'string' ? symbol + value : value
+  }
 
-/**
- * Recursively traverse an object to evoke all converted
- * getters, so that every nested property inside the object
- * is collected as a "deep" dependency.
- */
+  /*  */
 
-{
-  var perf = inBrowser && window.performance;
-  /* istanbul ignore if */
-  if (
-    perf &&
-    perf.mark &&
-    perf.measure &&
-    perf.clearMarks &&
-    perf.clearMeasures
-  ) {
-    
+  function installRenderHelpers (target) {
+    target._o = markOnce;
+    target._n = toNumber;
+    target._s = toString;
+    target._l = renderList;
+    target._t = renderSlot;
+    target._q = looseEqual;
+    target._i = looseIndexOf;
+    target._m = renderStatic;
+    target._f = resolveFilter;
+    target._k = checkKeyCodes;
+    target._b = bindObjectProps;
+    target._v = createTextVNode;
+    target._e = createEmptyVNode;
+    target._u = resolveScopedSlots;
+    target._g = bindObjectListeners;
+    target._d = bindDynamicKeys;
+    target._p = prependModifier;
   }
-}
 
-/*  */
+  /*  */
 
-var normalizeEvent = cached(function (name) {
-  var passive = name.charAt(0) === '&';
-  name = passive ? name.slice(1) : name;
-  var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first
-  name = once$$1 ? name.slice(1) : name;
-  var capture = name.charAt(0) === '!';
-  name = capture ? name.slice(1) : name;
-  return {
-    name: name,
-    once: once$$1,
-    capture: capture,
-    passive: passive
-  }
-});
 
-function createFnInvoker (fns) {
-  function invoker () {
-    var arguments$1 = arguments;
 
-    var fns = invoker.fns;
-    if (Array.isArray(fns)) {
-      var cloned = fns.slice();
-      for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+  /**
+   * Runtime helper for resolving raw children VNodes into a slot object.
+   */
+  function resolveSlots (
+    children,
+    context
+  ) {
+    if (!children || !children.length) {
+      return {}
+    }
+    var slots = {};
+    for (var i = 0, l = children.length; i < l; i++) {
+      var child = children[i];
+      var data = child.data;
+      // remove slot attribute if the node is resolved as a Vue slot node
+      if (data && data.attrs && data.attrs.slot) {
+        delete data.attrs.slot;
       }
-    } else {
-      // return handler return value for single handlers
-      return fns.apply(null, arguments)
-    }
-  }
-  invoker.fns = fns;
-  return invoker
-}
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, def, cur, old, event;
-  for (name in on) {
-    def = cur = on[name];
-    old = oldOn[name];
-    event = normalizeEvent(name);
-    /* istanbul ignore if */
-    if (isUndef(cur)) {
-      "development" !== 'production' && warn(
-        "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
-        vm
-      );
-    } else if (isUndef(old)) {
-      if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+      // named slots should only be respected if the vnode was rendered in the
+      // same context.
+      if ((child.context === context || child.fnContext === context) &&
+        data && data.slot != null
+      ) {
+        var name = data.slot;
+        var slot = (slots[name] || (slots[name] = []));
+        if (child.tag === 'template') {
+          slot.push.apply(slot, child.children || []);
+        } else {
+          slot.push(child);
+        }
+      } else {
+        (slots.default || (slots.default = [])).push(child);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
-    } else if (cur !== old) {
-      old.fns = cur;
-      on[name] = old;
     }
-  }
-  for (name in oldOn) {
-    if (isUndef(on[name])) {
-      event = normalizeEvent(name);
-      remove$$1(event.name, oldOn[name], event.capture);
+    // ignore slots that contains only whitespace
+    for (var name$1 in slots) {
+      if (slots[name$1].every(isWhitespace)) {
+        delete slots[name$1];
+      }
     }
+    return slots
   }
-}
 
-/*  */
+  function isWhitespace (node) {
+    return (node.isComment && !node.asyncFactory) || node.text === ' '
+  }
 
-/*  */
+  /*  */
 
-function extractPropsFromVNodeData (
-  data,
-  Ctor,
-  tag
-) {
-  // we are only extracting raw values here.
-  // validation and default values are handled in the child
-  // component itself.
-  var propOptions = Ctor.options.props;
-  if (isUndef(propOptions)) {
-    return
+  function isAsyncPlaceholder (node) {
+    return node.isComment && node.asyncFactory
   }
-  var res = {};
-  var attrs = data.attrs;
-  var props = data.props;
-  if (isDef(attrs) || isDef(props)) {
-    for (var key in propOptions) {
-      var altKey = hyphenate(key);
-      {
-        var keyInLowerCase = key.toLowerCase();
-        if (
-          key !== keyInLowerCase &&
-          attrs && hasOwn(attrs, keyInLowerCase)
-        ) {
-          tip(
-            "Prop \"" + keyInLowerCase + "\" is passed to component " +
-            (formatComponentName(tag || Ctor)) + ", but the declared prop name is" +
-            " \"" + key + "\". " +
-            "Note that HTML attributes are case-insensitive and camelCased " +
-            "props need to use their kebab-case equivalents when using in-DOM " +
-            "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"."
-          );
+
+  /*  */
+
+  function normalizeScopedSlots (
+    slots,
+    normalSlots,
+    prevSlots
+  ) {
+    var res;
+    var hasNormalSlots = Object.keys(normalSlots).length > 0;
+    var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+    var key = slots && slots.$key;
+    if (!slots) {
+      res = {};
+    } else if (slots._normalized) {
+      // fast path 1: child component re-render only, parent did not change
+      return slots._normalized
+    } else if (
+      isStable &&
+      prevSlots &&
+      prevSlots !== emptyObject &&
+      key === prevSlots.$key &&
+      !hasNormalSlots &&
+      !prevSlots.$hasNormal
+    ) {
+      // fast path 2: stable scoped slots w/ no normal slots to proxy,
+      // only need to normalize once
+      return prevSlots
+    } else {
+      res = {};
+      for (var key$1 in slots) {
+        if (slots[key$1] && key$1[0] !== '$') {
+          res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
         }
       }
-      checkProp(res, props, key, altKey, true) ||
-      checkProp(res, attrs, key, altKey, false);
     }
-  }
-  return res
-}
-
-function checkProp (
-  res,
-  hash,
-  key,
-  altKey,
-  preserve
-) {
-  if (isDef(hash)) {
-    if (hasOwn(hash, key)) {
-      res[key] = hash[key];
-      if (!preserve) {
-        delete hash[key];
+    // expose normal slots on scopedSlots
+    for (var key$2 in normalSlots) {
+      if (!(key$2 in res)) {
+        res[key$2] = proxyNormalSlot(normalSlots, key$2);
       }
-      return true
-    } else if (hasOwn(hash, altKey)) {
-      res[key] = hash[altKey];
-      if (!preserve) {
-        delete hash[altKey];
-      }
-      return true
     }
+    // avoriaz seems to mock a non-extensible $scopedSlots object
+    // and when that is passed down this would cause an error
+    if (slots && Object.isExtensible(slots)) {
+      (slots)._normalized = res;
+    }
+    def(res, '$stable', isStable);
+    def(res, '$key', key);
+    def(res, '$hasNormal', hasNormalSlots);
+    return res
   }
-  return false
-}
-
-/*  */
-
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
-}
-
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
-  }
-
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
-
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
-  }
-
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
 
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
+  function normalizeScopedSlot(normalSlots, key, fn) {
+    var normalized = function () {
+      var res = arguments.length ? fn.apply(null, arguments) : fn({});
+      res = res && typeof res === 'object' && !Array.isArray(res)
+        ? [res] // single vnode
+        : normalizeChildren(res);
+      var vnode = res && res[0];
+      return res && (
+        !vnode ||
+        (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+      ) ? undefined
+        : res
     };
+    // this is a slot using the new v-slot syntax without scope. although it is
+    // compiled as a scoped slot, render fn users would expect it to be present
+    // on this.$slots because the usage is semantically a normal slot.
+    if (fn.proxy) {
+      Object.defineProperty(normalSlots, key, {
+        get: normalized,
+        enumerable: true,
+        configurable: true
+      });
+    }
+    return normalized
+  }
 
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      "development" !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
+  function proxyNormalSlot(slots, key) {
+    return function () { return slots[key]; }
+  }
 
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
+  /*  */
 
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
+  var currentRenderingInstance = null;
 
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
+  /*  */
 
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                "timeout (" + (res.timeout) + "ms)"
-              );
-            }
-          }, res.timeout);
-        }
-      }
+  function ensureCtor (comp, base) {
+    if (
+      comp.__esModule ||
+      (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+    ) {
+      comp = comp.default;
     }
+    return isObject(comp)
+      ? base.extend(comp)
+      : comp
+  }
 
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
+  function createAsyncPlaceholder (
+    factory,
+    data,
+    context,
+    children,
+    tag
+  ) {
+    var node = createEmptyVNode();
+    node.asyncFactory = factory;
+    node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+    return node
   }
-}
 
-/*  */
+  function resolveAsyncComponent (
+    factory,
+    baseCtor
+  ) {
+    if (isTrue(factory.error) && isDef(factory.errorComp)) {
+      return factory.errorComp
+    }
 
-/*  */
+    if (isDef(factory.resolved)) {
+      return factory.resolved
+    }
 
-/*  */
+    var owner = currentRenderingInstance;
+    if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+      // already pending
+      factory.owners.push(owner);
+    }
 
-/*  */
+    if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+      return factory.loadingComp
+    }
 
+    if (owner && !isDef(factory.owners)) {
+      var owners = factory.owners = [owner];
+      var sync = true;
+      var timerLoading = null;
+      var timerTimeout = null
 
+      ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
 
-var target;
+      var forceRender = function (renderCompleted) {
+        for (var i = 0, l = owners.length; i < l; i++) {
+          (owners[i]).$forceUpdate();
+        }
 
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
+        if (renderCompleted) {
+          owners.length = 0;
+          if (timerLoading !== null) {
+            clearTimeout(timerLoading);
+            timerLoading = null;
+          }
+          if (timerTimeout !== null) {
+            clearTimeout(timerTimeout);
+            timerTimeout = null;
+          }
+        }
+      };
 
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
+      var resolve = once(function (res) {
+        // cache resolved
+        factory.resolved = ensureCtor(res, baseCtor);
+        // invoke callbacks only if this is not a synchronous resolve
+        // (async resolves are shimmed as synchronous during SSR)
+        if (!sync) {
+          forceRender(true);
+        } else {
+          owners.length = 0;
+        }
+      });
 
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
+      var reject = once(function (reason) {
+        warn(
+          "Failed to resolve async component: " + (String(factory)) +
+          (reason ? ("\nReason: " + reason) : '')
+        );
+        if (isDef(factory.errorComp)) {
+          factory.error = true;
+          forceRender(true);
+        }
+      });
 
-/*  */
+      var res = factory(resolve, reject);
 
+      if (isObject(res)) {
+        if (isPromise(res)) {
+          // () => Promise
+          if (isUndef(factory.resolved)) {
+            res.then(resolve, reject);
+          }
+        } else if (isPromise(res.component)) {
+          res.component.then(resolve, reject);
 
+          if (isDef(res.error)) {
+            factory.errorComp = ensureCtor(res.error, baseCtor);
+          }
 
-/**
- * Runtime helper for resolving raw children VNodes into a slot object.
- */
-function resolveSlots (
-  children,
-  context
-) {
-  var slots = {};
-  if (!children) {
-    return slots
-  }
-  for (var i = 0, l = children.length; i < l; i++) {
-    var child = children[i];
-    var data = child.data;
-    // remove slot attribute if the node is resolved as a Vue slot node
-    if (data && data.attrs && data.attrs.slot) {
-      delete data.attrs.slot;
-    }
-    // named slots should only be respected if the vnode was rendered in the
-    // same context.
-    if ((child.context === context || child.fnContext === context) &&
-      data && data.slot != null
-    ) {
-      var name = data.slot;
-      var slot = (slots[name] || (slots[name] = []));
-      if (child.tag === 'template') {
-        slot.push.apply(slot, child.children || []);
-      } else {
-        slot.push(child);
-      }
-    } else {
-      (slots.default || (slots.default = [])).push(child);
-    }
-  }
-  // ignore slots that contains only whitespace
-  for (var name$1 in slots) {
-    if (slots[name$1].every(isWhitespace)) {
-      delete slots[name$1];
-    }
-  }
-  return slots
-}
+          if (isDef(res.loading)) {
+            factory.loadingComp = ensureCtor(res.loading, baseCtor);
+            if (res.delay === 0) {
+              factory.loading = true;
+            } else {
+              timerLoading = setTimeout(function () {
+                timerLoading = null;
+                if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                  factory.loading = true;
+                  forceRender(false);
+                }
+              }, res.delay || 200);
+            }
+          }
 
-function isWhitespace (node) {
-  return (node.isComment && !node.asyncFactory) || node.text === ' '
-}
+          if (isDef(res.timeout)) {
+            timerTimeout = setTimeout(function () {
+              timerTimeout = null;
+              if (isUndef(factory.resolved)) {
+                reject(
+                  "timeout (" + (res.timeout) + "ms)"
+                );
+              }
+            }, res.timeout);
+          }
+        }
+      }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
-) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
+      sync = false;
+      // return in case resolved synchronously
+      return factory.loading
+        ? factory.loadingComp
+        : factory.resolved
     }
   }
-  return res
-}
-
-/*  */
-
-var activeInstance = null;
 
+  /*  */
 
+  /*  */
 
+  /*  */
 
+  var target;
 
+  function add (event, fn) {
+    target.$on(event, fn);
+  }
 
+  function remove$1 (event, fn) {
+    target.$off(event, fn);
+  }
 
+  function createOnceHandler (event, fn) {
+    var _target = target;
+    return function onceHandler () {
+      var res = fn.apply(null, arguments);
+      if (res !== null) {
+        _target.$off(event, onceHandler);
+      }
+    }
+  }
 
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  {
-    
+  function updateComponentListeners (
+    vm,
+    listeners,
+    oldListeners
+  ) {
+    target = vm;
+    updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+    target = undefined;
   }
 
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
+  /*  */
 
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+  var activeInstance = null;
 
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
+  function updateChildComponent (
+    vm,
+    propsData,
+    listeners,
+    parentVnode,
+    renderChildren
+  ) {
 
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+    // determine whether component has slot children
+    // we need to do this before overwriting $options._renderChildren.
+
+    // check if there are dynamic scopedSlots (hand-written or compiled but with
+    // dynamic slot names). Static scoped slots compiled from template has the
+    // "$stable" marker.
+    var newScopedSlots = parentVnode.data.scopedSlots;
+    var oldScopedSlots = vm.$scopedSlots;
+    var hasDynamicScopedSlot = !!(
+      (newScopedSlots && !newScopedSlots.$stable) ||
+      (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+      (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+      (!newScopedSlots && vm.$scopedSlots.$key)
+    );
+
+    // Any static slot children from the parent may have changed during parent's
+    // update. Dynamic scoped slots may also have changed. In such cases, a forced
+    // update is necessary to ensure correctness.
+    var needsForceUpdate = !!(
+      renderChildren ||               // has new static slots
+      vm.$options._renderChildren ||  // has old static slots
+      hasDynamicScopedSlot
+    );
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
+    vm.$options._parentVnode = parentVnode;
+    vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+    if (vm._vnode) { // update child tree's parent
+      vm._vnode.parent = parentVnode;
+    }
+    vm.$options._renderChildren = renderChildren;
+
+    // update $attrs and $listeners hash
+    // these are also reactive so they may trigger child update if the child
+    // used them during render
+    vm.$attrs = parentVnode.data.attrs || emptyObject;
+    vm.$listeners = listeners || emptyObject;
+
+    // update props
+    if (propsData && vm.$options.props) {
+      toggleObserving(false);
+      var props = vm._props;
+      var propKeys = vm.$options._propKeys || [];
+      for (var i = 0; i < propKeys.length; i++) {
+        var key = propKeys[i];
+        var propOptions = vm.$options.props; // wtf flow?
+        props[key] = validateProp(key, propOptions, propsData, vm);
+      }
+      toggleObserving(true);
+      // keep a copy of raw propsData
+      vm.$options.propsData = propsData;
     }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
 
-  // update listeners
-  if (listeners) {
+    // update listeners
+    listeners = listeners || emptyObject;
     var oldListeners = vm.$options._parentListeners;
     vm.$options._parentListeners = listeners;
     updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
 
-  {
-    
+    // resolve slots + force update if has children
+    if (needsForceUpdate) {
+      vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+      vm.$forceUpdate();
+    }
   }
-}
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
+  function isInInactiveTree (vm) {
+    while (vm && (vm = vm.$parent)) {
+      if (vm._inactive) { return true }
+    }
+    return false
   }
-  return false
-}
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
+  function activateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = false;
+      if (isInInactiveTree(vm)) {
+        return
+      }
+    } else if (vm._directInactive) {
       return
     }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
+    if (vm._inactive || vm._inactive === null) {
+      vm._inactive = false;
+      for (var i = 0; i < vm.$children.length; i++) {
+        activateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'activated');
     }
-    callHook(vm, 'activated');
   }
-}
 
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
+  function deactivateChildComponent (vm, direct) {
+    if (direct) {
+      vm._directInactive = true;
+      if (isInInactiveTree(vm)) {
+        return
+      }
     }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
+    if (!vm._inactive) {
+      vm._inactive = true;
+      for (var i = 0; i < vm.$children.length; i++) {
+        deactivateChildComponent(vm.$children[i]);
+      }
+      callHook(vm, 'deactivated');
     }
-    callHook(vm, 'deactivated');
   }
-}
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
+  function callHook (vm, hook) {
+    // #7573 disable dep collection when invoking lifecycle hooks
+    pushTarget();
+    var handlers = vm.$options[hook];
+    var info = hook + " hook";
+    if (handlers) {
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        invokeWithErrorHandling(handlers[i], vm, null, vm, info);
       }
     }
+    if (vm._hasHookEvent) {
+      vm.$emit('hook:' + hook);
+    }
+    popTarget();
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
-
-/*  */
 
+  /*  */
 
+  // Async edge case fix requires storing an event listener's attach timestamp.
+  var getNow = Date.now;
 
+  // Determine what event timestamp the browser is using. Annoyingly, the
+  // timestamp can either be hi-res (relative to page load) or low-res
+  // (relative to UNIX epoch), so in order to compare time we have to use the
+  // same timestamp type when saving the flush timestamp.
+  // All IE versions use low-res event timestamps, and have problematic clock
+  // implementations (#9632)
+  if (inBrowser && !isIE) {
+    var performance = window.performance;
+    if (
+      performance &&
+      typeof performance.now === 'function' &&
+      getNow() > document.createEvent('Event').timeStamp
+    ) {
+      // if the event timestamp, although evaluated AFTER the Date.now(), is
+      // smaller than it, it means the event is using a hi-res timestamp,
+      // and we need to use the hi-res version for event listener timestamps as
+      // well.
+      getNow = function () { return performance.now(); };
+    }
+  }
 
-var activatedChildren = [];
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
+  /**
+   * Queue a kept-alive component that was activated during patch.
+   * The queue will be processed after the entire tree has been patched.
+   */
+  function queueActivatedComponent (vm) {
+    // setting _inactive to false here so that a render function can
+    // rely on checking whether it's in an inactive tree (e.g. router-view)
+    vm._inactive = false;
+  }
 
-/*  */
+  /*  */
 
-/*  */
+  /*  */
 
-/*  */
+  /*  */
 
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
+  function resolveInject (inject, vm) {
+    if (inject) {
+      // inject is :any because flow is not smart enough to figure out cached
+      var result = Object.create(null);
+      var keys = hasSymbol
+        ? Reflect.ownKeys(inject)
+        : Object.keys(inject);
 
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
+      for (var i = 0; i < keys.length; i++) {
+        var key = keys[i];
+        // #6574 in case the inject object is observed...
+        if (key === '__ob__') { continue }
+        var provideKey = inject[key].from;
+        var source = vm;
+        while (source) {
+          if (source._provided && hasOwn(source._provided, provideKey)) {
+            result[key] = source._provided[provideKey];
+            break
+          }
+          source = source.$parent;
+        }
+        if (!source) {
+          if ('default' in inject[key]) {
+            var provideDefault = inject[key].default;
+            result[key] = typeof provideDefault === 'function'
+              ? provideDefault.call(vm)
+              : provideDefault;
+          } else {
+            warn(("Injection \"" + key + "\" not found"), vm);
+          }
+        }
+      }
+      return result
+    }
+  }
+
+  /*  */
+
+  function resolveConstructorOptions (Ctor) {
+    var options = Ctor.options;
+    if (Ctor.super) {
+      var superOptions = resolveConstructorOptions(Ctor.super);
+      var cachedSuperOptions = Ctor.superOptions;
+      if (superOptions !== cachedSuperOptions) {
+        // super option changed,
+        // need to resolve new options.
+        Ctor.superOptions = superOptions;
+        // check if there are any late-modified/attached options (#4976)
+        var modifiedOptions = resolveModifiedOptions(Ctor);
+        // update base extend options
+        if (modifiedOptions) {
+          extend(Ctor.extendOptions, modifiedOptions);
+        }
+        options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
+        if (options.name) {
+          options.components[options.name] = Ctor;
+        }
+      }
+    }
+    return options
   }
-  return _createElement(context, tag, data, children, normalizationType)
-}
 
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    "development" !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
-  }
-  // warn against non-primitive key
-  if ("development" !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
+  function resolveModifiedOptions (Ctor) {
+    var modified;
+    var latest = Ctor.options;
+    var sealed = Ctor.sealedOptions;
+    for (var key in latest) {
+      if (latest[key] !== sealed[key]) {
+        if (!modified) { modified = {}; }
+        modified[key] = latest[key];
+      }
     }
+    return modified
   }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
+
+  /*  */
+
+  function FunctionalRenderContext (
+    data,
+    props,
+    children,
+    parent,
+    Ctor
   ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
+    var this$1 = this;
+
+    var options = Ctor.options;
+    // ensure the createElement function in functional components
+    // gets a unique context - this is necessary for correct named slot check
+    var contextVm;
+    if (hasOwn(parent, '_uid')) {
+      contextVm = Object.create(parent);
+      // $flow-disable-line
+      contextVm._original = parent;
     } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
-    }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if ("development" !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if ("development" !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
+      // the context vm passed in is a functional context as well.
+      // in this case we want to make sure we are able to get a hold to the
+      // real context instance.
+      contextVm = parent;
+      // $flow-disable-line
+      parent = parent._original;
+    }
+    var isCompiled = isTrue(options._compiled);
+    var needNormalization = !isCompiled;
+
+    this.data = data;
+    this.props = props;
+    this.children = children;
+    this.parent = parent;
+    this.listeners = data.on || emptyObject;
+    this.injections = resolveInject(options.inject, parent);
+    this.slots = function () {
+      if (!this$1.$slots) {
+        normalizeScopedSlots(
+          data.scopedSlots,
+          this$1.$slots = resolveSlots(children, parent)
         );
       }
-      slotNodes._rendered = true;
-    }
-    nodes = slotNodes || fallback;
-  }
+      return this$1.$slots
+    };
 
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
-
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      "development" !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
+    Object.defineProperty(this, 'scopedSlots', ({
+      enumerable: true,
+      get: function get () {
+        return normalizeScopedSlots(data.scopedSlots, this.slots())
       }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
+    }));
+
+    // support for compiled functional template
+    if (isCompiled) {
+      // exposing $options for renderStatic()
+      this.$options = options;
+      // pre-resolve slots for renderSlot()
+      this.$slots = this.slots();
+      this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+    }
+
+    if (options._scopeId) {
+      this._c = function (a, b, c, d) {
+        var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+        if (vnode && !Array.isArray(vnode)) {
+          vnode.fnScopeId = options._scopeId;
+          vnode.fnContext = parent;
         }
+        return vnode
       };
-
-      for (var key in value) loop( key );
-    }
-  }
-  return data
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
-}
-
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
-
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
+    } else {
+      this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
   }
-}
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
-}
+  installRenderHelpers(FunctionalRenderContext.prototype);
 
-/*  */
-
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      "development" !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
+  function createFunctionalComponent (
+    Ctor,
+    propsData,
+    data,
+    contextVm,
+    children
+  ) {
+    var options = Ctor.options;
+    var props = {};
+    var propOptions = options.props;
+    if (isDef(propOptions)) {
+      for (var key in propOptions) {
+        props[key] = validateProp(key, propOptions, propsData || emptyObject);
       }
+    } else {
+      if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+      if (isDef(data.props)) { mergeProps(props, data.props); }
     }
-  }
-  return data
-}
-
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-}
-
-/*  */
-
-/*  */
-
-
-
 
+    var renderContext = new FunctionalRenderContext(
+      data,
+      props,
+      children,
+      contextVm,
+      Ctor
+    );
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
+    var vnode = options.render.call(null, renderContext._c, renderContext);
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
-        }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else {
-          warn(("Injection \"" + key + "\" not found"), vm);
-        }
+    if (vnode instanceof VNode) {
+      return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+    } else if (Array.isArray(vnode)) {
+      var vnodes = normalizeChildren(vnode) || [];
+      var res = new Array(vnodes.length);
+      for (var i = 0; i < vnodes.length; i++) {
+        res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
       }
+      return res
+    }
+  }
+
+  function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+    // #7817 clone node before setting fnContext, otherwise if the node is reused
+    // (e.g. it was from a cached normal slot) the fnContext causes named slots
+    // that should not be matched to match.
+    var clone = cloneVNode(vnode);
+    clone.fnContext = contextVm;
+    clone.fnOptions = options;
+    {
+      (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
     }
-    return result
+    if (data.slot) {
+      (clone.data || (clone.data = {})).slot = data.slot;
+    }
+    return clone
   }
-}
 
-/*  */
+  function mergeProps (to, from) {
+    for (var key in from) {
+      to[camelize(key)] = from[key];
+    }
+  }
 
+  /*  */
 
+  /*  */
 
+  /*  */
 
+  /*  */
 
-function resolveConstructorOptions (Ctor) {
-  var options = Ctor.options;
-  if (Ctor.super) {
-    var superOptions = resolveConstructorOptions(Ctor.super);
-    var cachedSuperOptions = Ctor.superOptions;
-    if (superOptions !== cachedSuperOptions) {
-      // super option changed,
-      // need to resolve new options.
-      Ctor.superOptions = superOptions;
-      // check if there are any late-modified/attached options (#4976)
-      var modifiedOptions = resolveModifiedOptions(Ctor);
-      // update base extend options
-      if (modifiedOptions) {
-        extend(Ctor.extendOptions, modifiedOptions);
-      }
-      options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);
-      if (options.name) {
-        options.components[options.name] = Ctor;
+  // inline hooks to be invoked on component VNodes during patch
+  var componentVNodeHooks = {
+    init: function init (vnode, hydrating) {
+      if (
+        vnode.componentInstance &&
+        !vnode.componentInstance._isDestroyed &&
+        vnode.data.keepAlive
+      ) {
+        // kept-alive components, treat as a patch
+        var mountedNode = vnode; // work around flow
+        componentVNodeHooks.prepatch(mountedNode, mountedNode);
+      } else {
+        var child = vnode.componentInstance = createComponentInstanceForVnode(
+          vnode,
+          activeInstance
+        );
+        child.$mount(hydrating ? vnode.elm : undefined, hydrating);
       }
-    }
-  }
-  return options
-}
+    },
 
-function resolveModifiedOptions (Ctor) {
-  var modified;
-  var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
-  var sealed = Ctor.sealedOptions;
-  for (var key in latest) {
-    if (latest[key] !== sealed[key]) {
-      if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
-    }
-  }
-  return modified
-}
+    prepatch: function prepatch (oldVnode, vnode) {
+      var options = vnode.componentOptions;
+      var child = vnode.componentInstance = oldVnode.componentInstance;
+      updateChildComponent(
+        child,
+        options.propsData, // updated props
+        options.listeners, // updated listeners
+        vnode, // new parent vnode
+        options.children // new children
+      );
+    },
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
+    insert: function insert (vnode) {
+      var context = vnode.context;
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isMounted) {
+        componentInstance._isMounted = true;
+        callHook(componentInstance, 'mounted');
       }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-/*  */
-
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
-
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
-
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
-  }
-
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
+      if (vnode.data.keepAlive) {
+        if (context._isMounted) {
+          // vue-router#1212
+          // During updates, a kept-alive component's child components may
+          // change, so directly walking the tree here may call activated hooks
+          // on incorrect children. Instead we push them into a queue which will
+          // be processed after the whole patch process ended.
+          queueActivatedComponent(componentInstance);
+        } else {
+          activateChildComponent(componentInstance, true /* direct */);
+        }
+      }
+    },
+
+    destroy: function destroy (vnode) {
+      var componentInstance = vnode.componentInstance;
+      if (!componentInstance._isDestroyed) {
+        if (!vnode.data.keepAlive) {
+          componentInstance.$destroy();
+        } else {
+          deactivateChildComponent(componentInstance, true /* direct */);
+        }
       }
-      return vnode
-    };
-  } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
-  }
-}
-
-installRenderHelpers(FunctionalRenderContext.prototype);
-
-function createFunctionalComponent (
-  Ctor,
-  propsData,
-  data,
-  contextVm,
-  children
-) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
     }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
-  }
+  };
 
-  var renderContext = new FunctionalRenderContext(
+  var hooksToMerge = Object.keys(componentVNodeHooks);
+
+  function createComponent (
+    Ctor,
     data,
-    props,
+    context,
     children,
-    contextVm,
-    Ctor
-  );
+    tag
+  ) {
+    if (isUndef(Ctor)) {
+      return
+    }
 
-  var vnode = options.render.call(null, renderContext._c, renderContext);
+    var baseCtor = context.$options._base;
 
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
+    // plain options object: turn it into a constructor
+    if (isObject(Ctor)) {
+      Ctor = baseCtor.extend(Ctor);
     }
-  }
-
-  return vnode
-}
 
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
-  }
-}
+    // if at this stage it's not a constructor or an async component factory,
+    // reject.
+    if (typeof Ctor !== 'function') {
+      {
+        warn(("Invalid Component definition: " + (String(Ctor))), context);
+      }
+      return
+    }
 
-/*  */
+    // async component
+    var asyncFactory;
+    if (isUndef(Ctor.cid)) {
+      asyncFactory = Ctor;
+      Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+      if (Ctor === undefined) {
+        // return a placeholder node for async component, which is rendered
+        // as a comment node but preserves all the raw information for the node.
+        // the information will be used for async server-rendering and hydration.
+        return createAsyncPlaceholder(
+          asyncFactory,
+          data,
+          context,
+          children,
+          tag
+        )
+      }
+    }
 
+    data = data || {};
 
+    // resolve constructor options in case global mixins are applied after
+    // component constructor creation
+    resolveConstructorOptions(Ctor);
 
+    // transform component v-model data into props & events
+    if (isDef(data.model)) {
+      transformModel(Ctor.options, data);
+    }
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
+    // extract props
+    var propsData = extractPropsFromVNodeData(data, Ctor, tag);
 
+    // functional component
+    if (isTrue(Ctor.options.functional)) {
+      return createFunctionalComponent(Ctor, propsData, data, context, children)
+    }
 
-// Updates the state of the component to weex native render engine.
+    // extract listeners, since these needs to be treated as
+    // child component listeners instead of DOM listeners
+    var listeners = data.on;
+    // replace with listeners with .native modifier
+    // so it gets processed during parent component patch.
+    data.on = data.nativeOn;
 
-/*  */
+    if (isTrue(Ctor.options.abstract)) {
+      // abstract components do not keep anything
+      // other than props & listeners & slot
 
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
+      // work around flow
+      var slot = data.slot;
+      data = {};
+      if (slot) {
+        data.slot = slot;
+      }
+    }
 
-// listening on native callback
+    // install component management hooks onto the placeholder node
+    installComponentHooks(data);
 
-/*  */
+    // return a placeholder vnode
+    var name = Ctor.options.name || tag;
+    var vnode = new VNode(
+      ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+      data, undefined, undefined, undefined, context,
+      { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+      asyncFactory
+    );
 
-/*  */
+    return vnode
+  }
 
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
+  function createComponentInstanceForVnode (
+    // we know it's MountedComponentVNode but flow doesn't
     vnode,
-    hydrating,
-    parentElm,
-    refElm
+    // activeInstance in lifecycle state
+    parent
   ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
-      );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
-    }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
-
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
+    var options = {
+      _isComponent: true,
+      _parentVnode: vnode,
+      parent: parent
+    };
+    // check inline-template render functions
+    var inlineTemplate = vnode.data.inlineTemplate;
+    if (isDef(inlineTemplate)) {
+      options.render = inlineTemplate.render;
+      options.staticRenderFns = inlineTemplate.staticRenderFns;
+    }
+    return new vnode.componentOptions.Ctor(options)
+  }
+
+  function installComponentHooks (data) {
+    var hooks = data.hook || (data.hook = {});
+    for (var i = 0; i < hooksToMerge.length; i++) {
+      var key = hooksToMerge[i];
+      var existing = hooks[key];
+      var toMerge = componentVNodeHooks[key];
+      if (existing !== toMerge && !(existing && existing._merged)) {
+        hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
       }
     }
-  },
+  }
 
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
+  function mergeHook$1 (f1, f2) {
+    var merged = function (a, b) {
+      // flow complains about extra args which is why we use any
+      f1(a, b);
+      f2(a, b);
+    };
+    merged._merged = true;
+    return merged
+  }
+
+  // transform component v-model info (value and callback) into
+  // prop and event handler respectively.
+  function transformModel (options, data) {
+    var prop = (options.model && options.model.prop) || 'value';
+    var event = (options.model && options.model.event) || 'input'
+    ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+    var on = data.on || (data.on = {});
+    var existing = on[event];
+    var callback = data.model.callback;
+    if (isDef(existing)) {
+      if (
+        Array.isArray(existing)
+          ? existing.indexOf(callback) === -1
+          : existing !== callback
+      ) {
+        on[event] = [callback].concat(existing);
       }
+    } else {
+      on[event] = callback;
     }
   }
-};
-
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
 
-  var baseCtor = context.$options._base;
+  /*  */
 
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
-
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
-    }
-    return
-  }
-
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+  var warned = Object.create(null);
+  var warnOnce = function (msg) {
+    if (!warned[msg]) {
+      warned[msg] = true;
+      // eslint-disable-next-line no-console
+      console.warn(("\n\u001b[31m" + msg + "\u001b[39m\n"));
     }
-  }
-
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
-
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
-  }
-
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
-
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
-  }
+  };
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
+  var onCompilationError = function (err, vm) {
+    var trace = vm ? generateComponentTrace(vm) : '';
+    throw new Error(("\n\u001b[31m" + err + trace + "\u001b[39m\n"))
+  };
 
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
+  var normalizeRender = function (vm) {
+    var ref = vm.$options;
+    var render = ref.render;
+    var template = ref.template;
+    var _scopeId = ref._scopeId;
+    if (isUndef(render)) {
+      if (template) {
+        var compiled = compileToFunctions(template, {
+          scopeId: _scopeId,
+          warn: onCompilationError
+        }, vm);
+
+        vm.$options.render = compiled.render;
+        vm.$options.staticRenderFns = compiled.staticRenderFns;
+      } else {
+        throw new Error(
+          ("render function or template not defined in component: " + (vm.$options.name || vm.$options._componentTag || 'anonymous'))
+        )
+      }
+    }
+  };
 
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
+  function waitForServerPrefetch (vm, resolve, reject) {
+    var handlers = vm.$options.serverPrefetch;
+    if (isDef(handlers)) {
+      if (!Array.isArray(handlers)) { handlers = [handlers]; }
+      try {
+        var promises = [];
+        for (var i = 0, j = handlers.length; i < j; i++) {
+          var result = handlers[i].call(vm, vm);
+          if (result && typeof result.then === 'function') {
+            promises.push(result);
+          }
+        }
+        Promise.all(promises).then(resolve).catch(reject);
+        return
+      } catch (e) {
+        reject(e);
+      }
     }
+    resolve();
   }
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
-
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
-
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  return vnode
-}
-
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
-  };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
-}
-
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
-  }
-}
-
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
-}
-
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
-
-/*  */
-
-var warned = Object.create(null);
-var warnOnce = function (msg) {
-  if (!warned[msg]) {
-    warned[msg] = true;
-    console.warn(("\n\u001b[31m" + msg + "\u001b[39m\n"));
-  }
-};
-
-var onCompilationError = function (err, vm) {
-  var trace = vm ? generateComponentTrace(vm) : '';
-  throw new Error(("\n\u001b[31m" + err + trace + "\u001b[39m\n"))
-};
-
-var normalizeRender = function (vm) {
-  var ref = vm.$options;
-  var render = ref.render;
-  var template = ref.template;
-  var _scopeId = ref._scopeId;
-  if (isUndef(render)) {
-    if (template) {
-      var compiled = compileToFunctions(template, {
-        scopeId: _scopeId,
-        warn: onCompilationError
-      }, vm);
-
-      vm.$options.render = compiled.render;
-      vm.$options.staticRenderFns = compiled.staticRenderFns;
+  function renderNode (node, isRoot, context) {
+    if (node.isString) {
+      renderStringNode$1(node, context);
+    } else if (isDef(node.componentOptions)) {
+      renderComponent(node, isRoot, context);
+    } else if (isDef(node.tag)) {
+      renderElement(node, isRoot, context);
+    } else if (isTrue(node.isComment)) {
+      if (isDef(node.asyncFactory)) {
+        // async component
+        renderAsyncComponent(node, isRoot, context);
+      } else {
+        context.write(("<!--" + (node.text) + "-->"), context.next);
+      }
     } else {
-      throw new Error(
-        ("render function or template not defined in component: " + (vm.$options.name || vm.$options._componentTag || 'anonymous'))
-      )
+      context.write(
+        node.raw ? node.text : escape(String(node.text)),
+        context.next
+      );
     }
   }
-};
 
-function renderNode (node, isRoot, context) {
-  if (node.isString) {
-    renderStringNode(node, context);
-  } else if (isDef(node.componentOptions)) {
-    renderComponent(node, isRoot, context);
-  } else if (isDef(node.tag)) {
-    renderElement(node, isRoot, context);
-  } else if (isTrue(node.isComment)) {
-    if (isDef(node.asyncFactory)) {
-      // async component
-      renderAsyncComponent(node, isRoot, context);
-    } else {
-      context.write(("<!--" + (node.text) + "-->"), context.next);
+  function registerComponentForCache (options, write) {
+    // exposed by vue-loader, need to call this if cache hit because
+    // component lifecycle hooks will not be called.
+    var register = options._ssrRegister;
+    if (write.caching && isDef(register)) {
+      write.componentBuffer[write.componentBuffer.length - 1].add(register);
     }
-  } else {
-    context.write(
-      node.raw ? node.text : escape(String(node.text)),
-      context.next
-    );
+    return register
   }
-}
-
-function registerComponentForCache (options, write) {
-  // exposed by vue-loader, need to call this if cache hit because
-  // component lifecycle hooks will not be called.
-  var register = options._ssrRegister;
-  if (write.caching && isDef(register)) {
-    write.componentBuffer[write.componentBuffer.length - 1].add(register);
-  }
-  return register
-}
-
-function renderComponent (node, isRoot, context) {
-  var write = context.write;
-  var next = context.next;
-  var userContext = context.userContext;
-
-  // check cache hit
-  var Ctor = node.componentOptions.Ctor;
-  var getKey = Ctor.options.serverCacheKey;
-  var name = Ctor.options.name;
-  var cache = context.cache;
-  var registerComponent = registerComponentForCache(Ctor.options, write);
-
-  if (isDef(getKey) && isDef(cache) && isDef(name)) {
-    var key = name + '::' + getKey(node.componentOptions.propsData);
-    var has = context.has;
-    var get = context.get;
-    if (isDef(has)) {
-      has(key, function (hit) {
-        if (hit === true && isDef(get)) {
-          get(key, function (res) {
+
+  function renderComponent (node, isRoot, context) {
+    var write = context.write;
+    var next = context.next;
+    var userContext = context.userContext;
+
+    // check cache hit
+    var Ctor = node.componentOptions.Ctor;
+    var getKey = Ctor.options.serverCacheKey;
+    var name = Ctor.options.name;
+    var cache = context.cache;
+    var registerComponent = registerComponentForCache(Ctor.options, write);
+
+    if (isDef(getKey) && isDef(cache) && isDef(name)) {
+      var rawKey = getKey(node.componentOptions.propsData);
+      if (rawKey === false) {
+        renderComponentInner(node, isRoot, context);
+        return
+      }
+      var key = name + '::' + rawKey;
+      var has = context.has;
+      var get = context.get;
+      if (isDef(has)) {
+        has(key, function (hit) {
+          if (hit === true && isDef(get)) {
+            get(key, function (res) {
+              if (isDef(registerComponent)) {
+                registerComponent(userContext);
+              }
+              res.components.forEach(function (register) { return register(userContext); });
+              write(res.html, next);
+            });
+          } else {
+            renderComponentWithCache(node, isRoot, key, context);
+          }
+        });
+      } else if (isDef(get)) {
+        get(key, function (res) {
+          if (isDef(res)) {
             if (isDef(registerComponent)) {
               registerComponent(userContext);
             }
             res.components.forEach(function (register) { return register(userContext); });
             write(res.html, next);
-          });
-        } else {
-          renderComponentWithCache(node, isRoot, key, context);
-        }
-      });
-    } else if (isDef(get)) {
-      get(key, function (res) {
-        if (isDef(res)) {
-          if (isDef(registerComponent)) {
-            registerComponent(userContext);
+          } else {
+            renderComponentWithCache(node, isRoot, key, context);
           }
-          res.components.forEach(function (register) { return register(userContext); });
-          write(res.html, next);
-        } else {
-          renderComponentWithCache(node, isRoot, key, context);
-        }
-      });
-    }
-  } else {
-    if (isDef(getKey) && isUndef(cache)) {
-      warnOnce(
-        "[vue-server-renderer] Component " + (Ctor.options.name || '(anonymous)') + " implemented serverCacheKey, " +
-        'but no cache was provided to the renderer.'
-      );
-    }
-    if (isDef(getKey) && isUndef(name)) {
-      warnOnce(
-        "[vue-server-renderer] Components that implement \"serverCacheKey\" " +
-        "must also define a unique \"name\" option."
-      );
-    }
-    renderComponentInner(node, isRoot, context);
-  }
-}
-
-function renderComponentWithCache (node, isRoot, key, context) {
-  var write = context.write;
-  write.caching = true;
-  var buffer = write.cacheBuffer;
-  var bufferIndex = buffer.push('') - 1;
-  var componentBuffer = write.componentBuffer;
-  componentBuffer.push(new Set());
-  context.renderStates.push({
-    type: 'ComponentWithCache',
-    key: key,
-    buffer: buffer,
-    bufferIndex: bufferIndex,
-    componentBuffer: componentBuffer
-  });
-  renderComponentInner(node, isRoot, context);
-}
-
-function renderComponentInner (node, isRoot, context) {
-  var prevActive = context.activeInstance;
-  // expose userContext on vnode
-  node.ssrContext = context.userContext;
-  var child = context.activeInstance = createComponentInstanceForVnode(
-    node,
-    context.activeInstance
-  );
-  normalizeRender(child);
-  var childNode = child._render();
-  childNode.parent = node;
-  context.renderStates.push({
-    type: 'Component',
-    prevActive: prevActive
-  });
-  renderNode(childNode, isRoot, context);
-}
-
-function renderAsyncComponent (node, isRoot, context) {
-  var factory = node.asyncFactory;
-
-  var resolve = function (comp) {
-    if (comp.__esModule && comp.default) {
-      comp = comp.default;
-    }
-    var ref = node.asyncMeta;
-    var data = ref.data;
-    var children = ref.children;
-    var tag = ref.tag;
-    var nodeContext = node.asyncMeta.context;
-    var resolvedNode = createComponent(
-      comp,
-      data,
-      nodeContext,
-      children,
-      tag
-    );
-    if (resolvedNode) {
-      renderComponent(resolvedNode, isRoot, context);
-    } else {
-      // invalid component, but this does not throw on the client
-      // so render empty comment node
-      context.write("<!---->", context.next);
-    }
-  };
-
-  if (factory.resolved) {
-    resolve(factory.resolved);
-    return
-  }
-
-  var reject = context.done;
-  var res;
-  try {
-    res = factory(resolve, reject);
-  } catch (e) {
-    reject(e);
-  }
-  if (res) {
-    if (typeof res.then === 'function') {
-      res.then(resolve, reject).catch(reject);
+        });
+      }
     } else {
-      // new syntax in 2.3
-      var comp = res.component;
-      if (comp && typeof comp.then === 'function') {
-        comp.then(resolve, reject).catch(reject);
+      if (isDef(getKey) && isUndef(cache)) {
+        warnOnce(
+          "[vue-server-renderer] Component " + (Ctor.options.name || '(anonymous)') + " implemented serverCacheKey, " +
+          'but no cache was provided to the renderer.'
+        );
+      }
+      if (isDef(getKey) && isUndef(name)) {
+        warnOnce(
+          "[vue-server-renderer] Components that implement \"serverCacheKey\" " +
+          "must also define a unique \"name\" option."
+        );
       }
+      renderComponentInner(node, isRoot, context);
     }
   }
-}
 
-function renderStringNode (el, context) {
-  var write = context.write;
-  var next = context.next;
-  if (isUndef(el.children) || el.children.length === 0) {
-    write(el.open + (el.close || ''), next);
-  } else {
-    var children = el.children;
+  function renderComponentWithCache (node, isRoot, key, context) {
+    var write = context.write;
+    write.caching = true;
+    var buffer = write.cacheBuffer;
+    var bufferIndex = buffer.push('') - 1;
+    var componentBuffer = write.componentBuffer;
+    componentBuffer.push(new Set());
     context.renderStates.push({
-      type: 'Element',
-      rendered: 0,
-      total: children.length,
-      endTag: el.close, children: children
+      type: 'ComponentWithCache',
+      key: key,
+      buffer: buffer,
+      bufferIndex: bufferIndex,
+      componentBuffer: componentBuffer
     });
-    write(el.open, next);
+    renderComponentInner(node, isRoot, context);
   }
-}
 
-function renderElement (el, isRoot, context) {
-  var write = context.write;
-  var next = context.next;
+  function renderComponentInner (node, isRoot, context) {
+    var prevActive = context.activeInstance;
+    // expose userContext on vnode
+    node.ssrContext = context.userContext;
+    var child = context.activeInstance = createComponentInstanceForVnode(
+      node,
+      context.activeInstance
+    );
+    normalizeRender(child);
+
+    var resolve = function () {
+      var childNode = child._render();
+      childNode.parent = node;
+      context.renderStates.push({
+        type: 'Component',
+        prevActive: prevActive
+      });
+      renderNode(childNode, isRoot, context);
+    };
 
-  if (isTrue(isRoot)) {
-    if (!el.data) { el.data = {}; }
-    if (!el.data.attrs) { el.data.attrs = {}; }
-    el.data.attrs[SSR_ATTR] = 'true';
-  }
+    var reject = context.done;
 
-  if (el.fnOptions) {
-    registerComponentForCache(el.fnOptions, write);
+    waitForServerPrefetch(child, resolve, reject);
   }
 
-  var startTag = renderStartingTag(el, context);
-  var endTag = "</" + (el.tag) + ">";
-  if (context.isUnaryTag(el.tag)) {
-    write(startTag, next);
-  } else if (isUndef(el.children) || el.children.length === 0) {
-    write(startTag + endTag, next);
-  } else {
-    var children = el.children;
-    context.renderStates.push({
-      type: 'Element',
-      rendered: 0,
-      total: children.length,
-      endTag: endTag, children: children
-    });
-    write(startTag, next);
-  }
-}
+  function renderAsyncComponent (node, isRoot, context) {
+    var factory = node.asyncFactory;
 
-function hasAncestorData (node) {
-  var parentNode = node.parent;
-  return isDef(parentNode) && (isDef(parentNode.data) || hasAncestorData(parentNode))
-}
+    var resolve = function (comp) {
+      if (comp.__esModule && comp.default) {
+        comp = comp.default;
+      }
+      var ref = node.asyncMeta;
+      var data = ref.data;
+      var children = ref.children;
+      var tag = ref.tag;
+      var nodeContext = node.asyncMeta.context;
+      var resolvedNode = createComponent(
+        comp,
+        data,
+        nodeContext,
+        children,
+        tag
+      );
+      if (resolvedNode) {
+        if (resolvedNode.componentOptions) {
+          // normal component
+          renderComponent(resolvedNode, isRoot, context);
+        } else if (!Array.isArray(resolvedNode)) {
+          // single return node from functional component
+          renderNode(resolvedNode, isRoot, context);
+        } else {
+          // multiple return nodes from functional component
+          context.renderStates.push({
+            type: 'Fragment',
+            children: resolvedNode,
+            rendered: 0,
+            total: resolvedNode.length
+          });
+          context.next();
+        }
+      } else {
+        // invalid component, but this does not throw on the client
+        // so render empty comment node
+        context.write("<!---->", context.next);
+      }
+    };
 
-function getVShowDirectiveInfo (node) {
-  var dir;
-  var tmp;
+    if (factory.resolved) {
+      resolve(factory.resolved);
+      return
+    }
 
-  while (isDef(node)) {
-    if (node.data && node.data.directives) {
-      tmp = node.data.directives.find(function (dir) { return dir.name === 'show'; });
-      if (tmp) {
-        dir = tmp;
+    var reject = context.done;
+    var res;
+    try {
+      res = factory(resolve, reject);
+    } catch (e) {
+      reject(e);
+    }
+    if (res) {
+      if (typeof res.then === 'function') {
+        res.then(resolve, reject).catch(reject);
+      } else {
+        // new syntax in 2.3
+        var comp = res.component;
+        if (comp && typeof comp.then === 'function') {
+          comp.then(resolve, reject).catch(reject);
+        }
       }
     }
-    node = node.parent;
   }
-  return dir
-}
 
-function renderStartingTag (node, context) {
-  var markup = "<" + (node.tag);
-  var directives = context.directives;
-  var modules = context.modules;
-
-  // construct synthetic data for module processing
-  // because modules like style also produce code by parent VNode data
-  if (isUndef(node.data) && hasAncestorData(node)) {
-    node.data = {};
+  function renderStringNode$1 (el, context) {
+    var write = context.write;
+    var next = context.next;
+    if (isUndef(el.children) || el.children.length === 0) {
+      write(el.open + (el.close || ''), next);
+    } else {
+      var children = el.children;
+      context.renderStates.push({
+        type: 'Element',
+        children: children,
+        rendered: 0,
+        total: children.length,
+        endTag: el.close
+      });
+      write(el.open, next);
+    }
   }
-  if (isDef(node.data)) {
-    // check directives
-    var dirs = node.data.directives;
-    if (dirs) {
-      for (var i = 0; i < dirs.length; i++) {
-        var name = dirs[i].name;
-        var dirRenderer = directives[name];
-        if (dirRenderer && name !== 'show') {
-          // directives mutate the node's data
-          // which then gets rendered by modules
-          dirRenderer(node, dirs[i]);
-        }
-      }
+
+  function renderElement (el, isRoot, context) {
+    var write = context.write;
+    var next = context.next;
+
+    if (isTrue(isRoot)) {
+      if (!el.data) { el.data = {}; }
+      if (!el.data.attrs) { el.data.attrs = {}; }
+      el.data.attrs[SSR_ATTR] = 'true';
     }
 
-    // v-show directive needs to be merged from parent to child
-    var vshowDirectiveInfo = getVShowDirectiveInfo(node);
-    if (vshowDirectiveInfo) {
-      directives.show(node, vshowDirectiveInfo);
+    if (el.fnOptions) {
+      registerComponentForCache(el.fnOptions, write);
     }
 
-    // apply other modules
-    for (var i$1 = 0; i$1 < modules.length; i$1++) {
-      var res = modules[i$1](node);
-      if (res) {
-        markup += res;
-      }
+    var startTag = renderStartingTag(el, context);
+    var endTag = "</" + (el.tag) + ">";
+    if (context.isUnaryTag(el.tag)) {
+      write(startTag, next);
+    } else if (isUndef(el.children) || el.children.length === 0) {
+      write(startTag + endTag, next);
+    } else {
+      var children = el.children;
+      context.renderStates.push({
+        type: 'Element',
+        children: children,
+        rendered: 0,
+        total: children.length,
+        endTag: endTag
+      });
+      write(startTag, next);
     }
   }
-  // attach scoped CSS ID
-  var scopeId;
-  var activeInstance = context.activeInstance;
-  if (isDef(activeInstance) &&
-    activeInstance !== node.context &&
-    isDef(scopeId = activeInstance.$options._scopeId)
-  ) {
-    markup += " " + ((scopeId));
+
+  function hasAncestorData (node) {
+    var parentNode = node.parent;
+    return isDef(parentNode) && (isDef(parentNode.data) || hasAncestorData(parentNode))
   }
-  if (isDef(node.fnScopeId)) {
-    markup += " " + (node.fnScopeId);
-  } else {
+
+  function getVShowDirectiveInfo (node) {
+    var dir;
+    var tmp;
+
     while (isDef(node)) {
-      if (isDef(scopeId = node.context.$options._scopeId)) {
-        markup += " " + scopeId;
+      if (node.data && node.data.directives) {
+        tmp = node.data.directives.find(function (dir) { return dir.name === 'show'; });
+        if (tmp) {
+          dir = tmp;
+        }
       }
       node = node.parent;
     }
+    return dir
+  }
+
+  function renderStartingTag (node, context) {
+    var markup = "<" + (node.tag);
+    var directives = context.directives;
+    var modules = context.modules;
+
+    // construct synthetic data for module processing
+    // because modules like style also produce code by parent VNode data
+    if (isUndef(node.data) && hasAncestorData(node)) {
+      node.data = {};
+    }
+    if (isDef(node.data)) {
+      // check directives
+      var dirs = node.data.directives;
+      if (dirs) {
+        for (var i = 0; i < dirs.length; i++) {
+          var name = dirs[i].name;
+          if (name !== 'show') {
+            var dirRenderer = resolveAsset(context, 'directives', name);
+            if (dirRenderer) {
+              // directives mutate the node's data
+              // which then gets rendered by modules
+              dirRenderer(node, dirs[i]);
+            }
+          }
+        }
+      }
+
+      // v-show directive needs to be merged from parent to child
+      var vshowDirectiveInfo = getVShowDirectiveInfo(node);
+      if (vshowDirectiveInfo) {
+        directives.show(node, vshowDirectiveInfo);
+      }
+
+      // apply other modules
+      for (var i$1 = 0; i$1 < modules.length; i$1++) {
+        var res = modules[i$1](node);
+        if (res) {
+          markup += res;
+        }
+      }
+    }
+    // attach scoped CSS ID
+    var scopeId;
+    var activeInstance = context.activeInstance;
+    if (isDef(activeInstance) &&
+      activeInstance !== node.context &&
+      isDef(scopeId = activeInstance.$options._scopeId)
+    ) {
+      markup += " " + ((scopeId));
+    }
+    if (isDef(node.fnScopeId)) {
+      markup += " " + (node.fnScopeId);
+    } else {
+      while (isDef(node)) {
+        if (isDef(scopeId = node.context.$options._scopeId)) {
+          markup += " " + scopeId;
+        }
+        node = node.parent;
+      }
+    }
+    return markup + '>'
   }
-  return markup + '>'
-}
 
-function createRenderFunction (
-  modules,
-  directives,
-  isUnaryTag,
-  cache
-) {
-  return function render (
-    component,
-    write,
-    userContext,
-    done
+  function createRenderFunction (
+    modules,
+    directives,
+    isUnaryTag,
+    cache
   ) {
-    warned = Object.create(null);
-    var context = new RenderContext({
-      activeInstance: component,
-      userContext: userContext,
-      write: write, done: done, renderNode: renderNode,
-      isUnaryTag: isUnaryTag, modules: modules, directives: directives,
-      cache: cache
-    });
-    installSSRHelpers(component);
-    normalizeRender(component);
-    renderNode(component._render(), true, context);
+    return function render (
+      component,
+      write,
+      userContext,
+      done
+    ) {
+      warned = Object.create(null);
+      var context = new RenderContext({
+        activeInstance: component,
+        userContext: userContext,
+        write: write, done: done, renderNode: renderNode,
+        isUnaryTag: isUnaryTag, modules: modules, directives: directives,
+        cache: cache
+      });
+      installSSRHelpers(component);
+      normalizeRender(component);
+
+      var resolve = function () {
+        renderNode(component._render(), true, context);
+      };
+      waitForServerPrefetch(component, resolve, done);
+    }
   }
-}
 
-/*  */
+  /*  */
 
-function createBasicRenderer (ref) {
-  if ( ref === void 0 ) ref = {};
-  var modules = ref.modules; if ( modules === void 0 ) modules = [];
-  var directives = ref.directives; if ( directives === void 0 ) directives = {};
-  var isUnaryTag = ref.isUnaryTag; if ( isUnaryTag === void 0 ) isUnaryTag = (function () { return false; });
-  var cache = ref.cache;
 
-  var render = createRenderFunction(modules, directives, isUnaryTag, cache);
+  function createBasicRenderer (ref) {
+    if ( ref === void 0 ) ref = {};
+    var modules = ref.modules; if ( modules === void 0 ) modules = [];
+    var directives = ref.directives; if ( directives === void 0 ) directives = {};
+    var isUnaryTag = ref.isUnaryTag; if ( isUnaryTag === void 0 ) isUnaryTag = (function () { return false; });
+    var cache = ref.cache;
 
-  return function renderToString (
-    component,
-    context,
-    done
-  ) {
-    if (typeof context === 'function') {
-      done = context;
-      context = {};
-    }
-    var result = '';
-    var write = createWriteFunction(function (text) {
-      result += text;
-      return false
-    }, done);
-    try {
-      render(component, write, context, function () {
-        done(null, result);
-      });
-    } catch (e) {
-      done(e);
+    var render = createRenderFunction(modules, directives, isUnaryTag, cache);
+
+    return function renderToString (
+      component,
+      context,
+      done
+    ) {
+      if (typeof context === 'function') {
+        done = context;
+        context = {};
+      }
+      var result = '';
+      var write = createWriteFunction(function (text) {
+        result += text;
+        return false
+      }, done);
+      try {
+        render(component, write, context, function () {
+          done(null, result);
+        });
+      } catch (e) {
+        done(e);
+      }
     }
   }
-}
 
-/*  */
+  /*  */
 
-var entryServerBasicRenderer = createBasicRenderer({
-  modules: modules,
-  directives: directives,
-  isUnaryTag: isUnaryTag,
-  canBeLeftOpenTag: canBeLeftOpenTag
-});
+  var entryServerBasicRenderer = createBasicRenderer({
+    modules: modules,
+    directives: directives,
+    isUnaryTag: isUnaryTag,
+    canBeLeftOpenTag: canBeLeftOpenTag
+  });
 
-return entryServerBasicRenderer;
+  return entryServerBasicRenderer;
 
-})));
+}));
diff --git a/packages/vue-server-renderer/build.js b/packages/vue-server-renderer/build.dev.js
similarity index 72%
rename from packages/vue-server-renderer/build.js
rename to packages/vue-server-renderer/build.dev.js
index 2b1afdc9801..f4a575aba89 100644
--- a/packages/vue-server-renderer/build.js
+++ b/packages/vue-server-renderer/build.dev.js
@@ -10,8 +10,8 @@ var he = _interopDefault(require('he'));
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 function isUndef (v) {
   return v === undefined || v === null
 }
@@ -29,7 +29,7 @@ function isFalse (v) {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 function isPrimitive (value) {
   return (
@@ -51,7 +51,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -67,8 +67,6 @@ function isPlainObject (obj) {
   return _toString.call(obj) === '[object Object]'
 }
 
-
-
 /**
  * Check if val is a valid array index.
  */
@@ -77,19 +75,27 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 function toString (val) {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {
@@ -121,12 +127,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -138,7 +144,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -180,14 +186,35 @@ var hyphenate = cached(function (str) {
 });
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
 
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
 
-/**
- * Convert an Array-like object to a real Array.
- */
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
 
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
 
 /**
  * Mix properties into target object.
@@ -212,10 +239,12 @@ function toObject (arr) {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -224,13 +253,15 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 var identity = function (_) { return _; };
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 function genStaticKeys (modules) {
   return modules.reduce(function (keys, m) {
@@ -254,6 +285,8 @@ function looseEqual (a, b) {
         return a.length === b.length && a.every(function (e, i) {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         var keysA = Object.keys(a);
         var keysB = Object.keys(b);
@@ -275,6 +308,11 @@ function looseEqual (a, b) {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 function looseIndexOf (arr, val) {
   for (var i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) { return i }
@@ -300,9 +338,9 @@ function once (fn) {
 var isAttr = makeMap(
   'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
   'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
+  'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+  'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
   'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
   'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
   'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
@@ -310,9 +348,14 @@ var isAttr = makeMap(
   'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
   'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
   'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
+  'target,title,usemap,value,width,wrap'
 );
 
+var unsafeAttrCharRE = /[>/="'\u0009\u000a\u000c\u0020]/; // eslint-disable-line no-control-regex
+var isSSRUnsafeAttr = function (name) {
+  return unsafeAttrCharRE.test(name)
+};
+
 /* istanbul ignore next */
 var isRenderableAttr = function (name) {
   return (
@@ -321,6 +364,7 @@ var isRenderableAttr = function (name) {
     name.indexOf('aria-') === 0
   )
 };
+
 var propsToAttrMap = {
   acceptCharset: 'accept-charset',
   className: 'class',
@@ -343,6 +387,51 @@ function escapeChar (a) {
   return ESC[a] || a
 }
 
+var noUnitNumericStyleProps = {
+  "animation-iteration-count": true,
+  "border-image-outset": true,
+  "border-image-slice": true,
+  "border-image-width": true,
+  "box-flex": true,
+  "box-flex-group": true,
+  "box-ordinal-group": true,
+  "column-count": true,
+  "columns": true,
+  "flex": true,
+  "flex-grow": true,
+  "flex-positive": true,
+  "flex-shrink": true,
+  "flex-negative": true,
+  "flex-order": true,
+  "grid-row": true,
+  "grid-row-end": true,
+  "grid-row-span": true,
+  "grid-row-start": true,
+  "grid-column": true,
+  "grid-column-end": true,
+  "grid-column-span": true,
+  "grid-column-start": true,
+  "font-weight": true,
+  "line-clamp": true,
+  "line-height": true,
+  "opacity": true,
+  "order": true,
+  "orphans": true,
+  "tab-size": true,
+  "widows": true,
+  "z-index": true,
+  "zoom": true,
+  // SVG
+  "fill-opacity": true,
+  "flood-opacity": true,
+  "stop-opacity": true,
+  "stroke-dasharray": true,
+  "stroke-dashoffset": true,
+  "stroke-miterlimit": true,
+  "stroke-opacity": true,
+  "stroke-width": true
+};
+
 /*  */
 
 // these are reserved for web because they are directly compiled away
@@ -362,21 +451,26 @@ var mustUseProp = function (tag, type, attr) {
 
 var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+var convertEnumeratedValue = function (key, value) {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+};
+
 var isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 );
 
-
-
-
-
-
-
 var isFalsyAttrValue = function (val) {
   return val == null || val === false
 };
@@ -391,6 +485,10 @@ function renderAttrs (node) {
   if (isUndef(opts) || opts.Ctor.options.inheritAttrs !== false) {
     var parent = node.parent;
     while (isDef(parent)) {
+      // Stop fallthrough in case parent has inheritAttrs option set to false
+      if (parent.componentOptions && parent.componentOptions.Ctor.options.inheritAttrs === false) {
+        break;
+      }
       if (isDef(parent.data) && isDef(parent.data.attrs)) {
         attrs = extend(extend({}, attrs), parent.data.attrs);
       }
@@ -403,6 +501,9 @@ function renderAttrs (node) {
   }
 
   for (var key in attrs) {
+    if (isSSRUnsafeAttr(key)) {
+      continue
+    }
     if (key === 'style') {
       // leave it to the style module
       continue
@@ -418,7 +519,7 @@ function renderAttr (key, value) {
       return (" " + key + "=\"" + key + "\"")
     }
   } else if (isEnumeratedAttr(key)) {
-    return (" " + key + "=\"" + (isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true') + "\"")
+    return (" " + key + "=\"" + (escape(convertEnumeratedValue(key, value))) + "\"")
   } else if (!isFalsyAttrValue(value)) {
     return (" " + key + "=\"" + (escape(String(value))) + "\"")
   }
@@ -489,16 +590,18 @@ function createTextVNode (val) {
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
 // on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
+function cloneVNode (vnode) {
   var cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
-    componentOptions,
+    vnode.componentOptions,
     vnode.asyncFactory
   );
   cloned.ns = vnode.ns;
@@ -508,27 +611,11 @@ function cloneVNode (vnode, deep) {
   cloned.fnContext = vnode.fnContext;
   cloned.fnOptions = vnode.fnOptions;
   cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
   cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
   return cloned
 }
 
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
 /*  */
 
 function renderDOMProps (node) {
@@ -554,7 +641,7 @@ function renderDOMProps (node) {
     } else if (key === 'textContent') {
       setText(node, props[key], false);
     } else if (key === 'value' && node.tag === 'textarea') {
-      setText(node, props[key], false);
+      setText(node, toString(props[key]), false);
     } else {
       // $flow-disable-line (WTF?)
       var attr = propsToAttrMap[key] || key.toLowerCase();
@@ -578,9 +665,11 @@ function setText (node, text, raw) {
 /*  */
 
 /**
- * Check if a string starts with $ or _
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
  */
-
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
 
 /**
  * Define a property.
@@ -596,7 +685,6 @@ function def (obj, key, val, enumerable) {
 
 /*  */
 
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -611,18 +699,16 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
-
-
 if (inBrowser) {
   try {
     var opts = {};
     Object.defineProperty(opts, 'passive', ({
       get: function get () {
-        /* istanbul ignore next */
-        
       }
     })); // https://github.com/facebook/flow/issues/285
     window.addEventListener('test-passive', null, opts);
@@ -635,10 +721,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -665,7 +751,7 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
   _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
+  _Set = /*@__PURE__*/(function () {
     function Set () {
       this.set = Object.create(null);
     }
@@ -702,11 +788,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -722,12 +811,12 @@ var config = ({
   /**
    * Show production mode tip message on boot?
    */
-  productionTip: process.env.NODE_ENV !== 'production',
+  productionTip: "development" !== 'production',
 
   /**
    * Whether to enable devtools
    */
-  devtools: process.env.NODE_ENV !== 'production',
+  devtools: "development" !== 'production',
 
   /**
    * Whether to record perf
@@ -789,6 +878,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -802,7 +897,7 @@ var tip = noop;
 var generateComponentTrace = (noop); // work around flow check
 var formatComponentName = (noop);
 
-if (process.env.NODE_ENV !== 'production') {
+{
   var hasConsole = typeof console !== 'undefined';
   var classifyRE = /(?:^|[-_])(\w)/g;
   var classify = function (str) { return str
@@ -812,9 +907,7 @@ if (process.env.NODE_ENV !== 'production') {
   warn = function (msg, vm) {
     var trace = vm ? generateComponentTrace(vm) : '';
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
+    if (hasConsole && (!config.silent)) {
       console.error(("[Vue warn]: " + msg + trace));
     }
   };
@@ -835,7 +928,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -891,7 +984,6 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
 var uid = 0;
 
 /**
@@ -925,10 +1017,21 @@ Dep.prototype.notify = function notify () {
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
+var targetStack = [];
+
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
+}
+
+function popTarget () {
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
+}
 
 /*
  * not type checking this file because flow doesn't play well with
@@ -936,7 +1039,9 @@ Dep.target = null;
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -944,7 +1049,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -975,20 +1085,20 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -996,10 +1106,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -1007,14 +1118,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -1030,17 +1141,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -1064,7 +1175,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -1081,7 +1192,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -1098,6 +1209,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -1123,9 +1237,11 @@ function defineReactive (
         return
       }
       /* eslint-enable no-self-compare */
-      if (process.env.NODE_ENV !== 'production' && customSetter) {
+      if (customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1143,6 +1259,10 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (isUndef(target) || isPrimitive(target)
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1154,7 +1274,7 @@ function set (target, key, val) {
   }
   var ob = (target).__ob__;
   if (target._isVue || (ob && ob.vmCount)) {
-    process.env.NODE_ENV !== 'production' && warn(
+    warn(
       'Avoid adding reactive properties to a Vue instance or its root $data ' +
       'at runtime - declare it upfront in the data option.'
     );
@@ -1164,16 +1284,11 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
 
-/**
- * Delete a property and trigger change if necessary.
- */
-
-
 /**
  * Collect dependencies on array elements when the array is touched, since
  * we cannot intercept array element access like property getters.
@@ -1200,7 +1315,7 @@ var strats = config.optionMergeStrategies;
 /**
  * Options with restrictions
  */
-if (process.env.NODE_ENV !== 'production') {
+{
   strats.el = strats.propsData = function (parent, child, vm, key) {
     if (!vm) {
       warn(
@@ -1218,14 +1333,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1284,7 +1409,7 @@ strats.data = function (
 ) {
   if (!vm) {
     if (childVal && typeof childVal !== 'function') {
-      process.env.NODE_ENV !== 'production' && warn(
+      warn(
         'The "data" option should be a function ' +
         'that returns a per-instance value in component ' +
         'definitions.',
@@ -1306,13 +1431,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -1334,7 +1472,7 @@ function mergeAssets (
 ) {
   var res = Object.create(parentVal || null);
   if (childVal) {
-    process.env.NODE_ENV !== 'production' && assertObjectType(key, childVal, vm);
+    assertObjectType(key, childVal, vm);
     return extend(res, childVal)
   } else {
     return res
@@ -1362,7 +1500,7 @@ strats.watch = function (
   if (childVal === nativeWatch) { childVal = undefined; }
   /* istanbul ignore if */
   if (!childVal) { return Object.create(parentVal || null) }
-  if (process.env.NODE_ENV !== 'production') {
+  {
     assertObjectType(key, childVal, vm);
   }
   if (!parentVal) { return childVal }
@@ -1393,7 +1531,7 @@ strats.computed = function (
   vm,
   key
 ) {
-  if (childVal && process.env.NODE_ENV !== 'production') {
+  if (childVal && "development" !== 'production') {
     assertObjectType(key, childVal, vm);
   }
   if (!parentVal) { return childVal }
@@ -1423,11 +1561,10 @@ function checkComponents (options) {
 }
 
 function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
     warn(
       'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
+      'should conform to valid custom element name in html5 specification.'
     );
   }
   if (isBuiltInTag(name) || config.isReservedTag(name)) {
@@ -1454,7 +1591,7 @@ function normalizeProps (options, vm) {
       if (typeof val === 'string') {
         name = camelize(val);
         res[name] = { type: null };
-      } else if (process.env.NODE_ENV !== 'production') {
+      } else {
         warn('props must be strings when using array syntax.');
       }
     }
@@ -1466,7 +1603,7 @@ function normalizeProps (options, vm) {
         ? val
         : { type: val };
     }
-  } else if (process.env.NODE_ENV !== 'production') {
+  } else {
     warn(
       "Invalid value for option \"props\": expected an Array or an Object, " +
       "but got " + (toRawType(props)) + ".",
@@ -1494,7 +1631,7 @@ function normalizeInject (options, vm) {
         ? extend({ from: key }, val)
         : { from: val };
     }
-  } else if (process.env.NODE_ENV !== 'production') {
+  } else {
     warn(
       "Invalid value for option \"inject\": expected an Array or an Object, " +
       "but got " + (toRawType(inject)) + ".",
@@ -1510,9 +1647,9 @@ function normalizeDirectives (options) {
   var dirs = options.directives;
   if (dirs) {
     for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
       }
     }
   }
@@ -1537,7 +1674,7 @@ function mergeOptions (
   child,
   vm
 ) {
-  if (process.env.NODE_ENV !== 'production') {
+  {
     checkComponents(child);
   }
 
@@ -1548,15 +1685,22 @@ function mergeOptions (
   normalizeProps(child, vm);
   normalizeInject(child, vm);
   normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
     }
   }
+
   var options = {};
   var key;
   for (key in parent) {
@@ -1598,7 +1742,7 @@ function resolveAsset (
   if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
   // fallback to prototype chain
   var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
-  if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
+  if (warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
       options
@@ -1609,6 +1753,8 @@ function resolveAsset (
 
 /*  */
 
+
+
 function validateProp (
   key,
   propOptions,
@@ -1618,12 +1764,18 @@ function validateProp (
   var prop = propOptions[key];
   var absent = !hasOwn(propsData, key);
   var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
     }
   }
   // check default value
@@ -1631,16 +1783,12 @@ function validateProp (
     value = getPropDefaultValue(vm, prop, key);
     // since the default value is a fresh copy,
     // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
     observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+    toggleObserving(prevShouldObserve);
   }
-  if (
-    process.env.NODE_ENV !== 'production' &&
-    // skip validation for weex recycle-list child component props
-    !(false && isObject(value) && ('@binding' in value))
-  ) {
+  {
     assertProp(prop, key, value, vm, absent);
   }
   return value
@@ -1656,7 +1804,7 @@ function getPropDefaultValue (vm, prop, key) {
   }
   var def = prop.default;
   // warn against non-factory defaults for Object & Array
-  if (process.env.NODE_ENV !== 'production' && isObject(def)) {
+  if (isObject(def)) {
     warn(
       'Invalid default value for prop "' + key + '": ' +
       'Props with type Object/Array must use a factory function ' +
@@ -1707,16 +1855,16 @@ function assertProp (
       type = [type];
     }
     for (var i = 0; i < type.length && !valid; i++) {
-      var assertedType = assertType(value, type[i]);
+      var assertedType = assertType(value, type[i], vm);
       expectedTypes.push(assertedType.expectedType || '');
       valid = assertedType.valid;
     }
   }
-  if (!valid) {
+
+  var haveExpectedTypes = expectedTypes.some(function (t) { return t; });
+  if (!valid && haveExpectedTypes) {
     warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     );
     return
@@ -1732,9 +1880,9 @@ function assertProp (
   }
 }
 
-var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;
+var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/;
 
-function assertType (value, type) {
+function assertType (value, type, vm) {
   var valid;
   var expectedType = getType(type);
   if (simpleCheckRE.test(expectedType)) {
@@ -1749,7 +1897,12 @@ function assertType (value, type) {
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value);
   } else {
-    valid = value instanceof type;
+    try {
+      valid = value instanceof type;
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
   }
   return {
     valid: valid,
@@ -1757,64 +1910,135 @@ function assertType (value, type) {
   }
 }
 
+var functionTypeCheckRE = /^\s*function (\w+)/;
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  var match = fn && fn.toString().match(/^\s*function (\w+)/);
+  var match = fn && fn.toString().match(functionTypeCheckRE);
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += " with value " + (styleValue(value, expectedType));
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + (styleValue(value, receivedType)) + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+var EXPLICABLE_TYPES = ['string', 'number', 'boolean'];
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
 }
 
 /*  */
 
 function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
   }
-  globalHandleError(err, vm, info);
 }
 
-function globalHandleError (err, vm, info) {
-  if (config.errorHandler) {
-    try {
-      return config.errorHandler.call(null, err, vm, info)
-    } catch (e) {
-      logError(e, null, 'config.errorHandler');
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
     }
+  } catch (e) {
+    handleError(e, vm, info);
   }
+  return res
+}
+
+function globalHandleError (err, vm, info) {
   logError(err, vm, info);
 }
 
 function logError (err, vm, info) {
-  if (process.env.NODE_ENV !== 'production') {
+  {
     warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm);
   }
   /* istanbul ignore else */
@@ -1826,9 +2050,9 @@ function logError (err, vm, info) {
 }
 
 /*  */
-/* globals MessageChannel */
 
 var callbacks = [];
+
 function flushCallbacks () {
   var copies = callbacks.slice(0);
   callbacks.length = 0;
@@ -1837,39 +2061,28 @@ function flushCallbacks () {
   }
 }
 
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  channel.port1.onmessage = flushCallbacks;
-  
-} else {
-  /* istanbul ignore next */
-  
-}
-
-// Determine MicroTask defer implementation.
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  
-} else {
-  // fallback to macro
-  
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
+if (typeof Promise !== 'undefined' && isNative(Promise)) ; else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
 
 /*  */
 
@@ -1890,7 +2103,7 @@ function genClassForVnode (vnode) {
       data = mergeClassData(data, parentNode.data);
     }
   }
-  return renderClass$1(data.staticClass, data.class)
+  return renderClass(data.staticClass, data.class)
 }
 
 function mergeClassData (child, parent) {
@@ -1902,7 +2115,7 @@ function mergeClassData (child, parent) {
   }
 }
 
-function renderClass$1 (
+function renderClass (
   staticClass,
   dynamicClass
 ) {
@@ -1956,8 +2169,6 @@ function stringifyObject (value) {
 
 /*  */
 
-
-
 var isHTMLTag = makeMap(
   'html,body,base,head,link,meta,style,title,' +
   'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
@@ -1976,7 +2187,7 @@ var isHTMLTag = makeMap(
 // contain child elements.
 var isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 );
@@ -1998,19 +2209,13 @@ function getTagNamespace (tag) {
   }
 }
 
-
-
 var isTextInputType = makeMap('text,number,password,search,email,tel,url');
 
 /*  */
 
-/**
- * Query an element selector if it's not an element already.
- */
-
 /*  */
 
-function renderClass (node) {
+function renderClass$1 (node) {
   var classList = genClassForVnode(node);
   if (classList !== '') {
     return (" class=\"" + (escape(classList)) + "\"")
@@ -2096,15 +2301,28 @@ function genStyle (style) {
     var hyphenatedKey = hyphenate(key);
     if (Array.isArray(value)) {
       for (var i = 0, len = value.length; i < len; i++) {
-        styleText += hyphenatedKey + ":" + (value[i]) + ";";
+        styleText += normalizeValue(hyphenatedKey, value[i]);
       }
     } else {
-      styleText += hyphenatedKey + ":" + value + ";";
+      styleText += normalizeValue(hyphenatedKey, value);
     }
   }
   return styleText
 }
 
+function normalizeValue(key, value) {
+  if (
+    typeof value === 'string' ||
+    (typeof value === 'number' && noUnitNumericStyleProps[key]) ||
+    value === 0
+  ) {
+    return (key + ":" + value + ";")
+  } else {
+    // invalid values
+    return ""
+  }
+}
+
 function renderStyle (vnode) {
   var styleText = genStyle(getStyle(vnode, false));
   if (styleText !== '') {
@@ -2115,7 +2333,7 @@ function renderStyle (vnode) {
 var modules = [
   renderAttrs,
   renderDOMProps,
-  renderClass,
+  renderClass$1,
   renderStyle
 ];
 
@@ -2124,7 +2342,11 @@ var modules = [
 function show (node, dir) {
   if (!dir.value) {
     var style = node.data.style || (node.data.style = {});
-    style.display = 'none';
+    if (Array.isArray(style)) {
+      style.push({ display: 'none' });
+    } else {
+      style.display = 'none';
+    }
   }
 }
 
@@ -2201,7 +2423,7 @@ var isNonPhrasingTag = makeMap(
 
 /*  */
 
-var MAX_STACK_DEPTH = 1000;
+var MAX_STACK_DEPTH = 800;
 var noop$1 = function (_) { return _; };
 
 var defer = typeof process !== 'undefined' && process.nextTick
@@ -2262,7 +2484,7 @@ function createWriteFunction (
 
 var stream = require('stream');
 
-var RenderStream = (function (superclass) {
+var RenderStream = /*@__PURE__*/(function (superclass) {
   function RenderStream (render) {
     var this$1 = this;
 
@@ -2285,6 +2507,7 @@ var RenderStream = (function (superclass) {
     });
 
     this.end = function () {
+      this$1.emit('beforeEnd');
       // the rendering is finished; we should push out the last of the buffer.
       this$1.done = true;
       this$1.push(this$1.buffer);
@@ -2344,6 +2567,8 @@ var RenderStream = (function (superclass) {
 
 /*  */
 
+
+
 var RenderContext = function RenderContext (options) {
   this.userContext = options.userContext;
   this.activeInstance = options.activeInstance;
@@ -2369,53 +2594,58 @@ var RenderContext = function RenderContext (options) {
 };
 
 RenderContext.prototype.next = function next () {
-  var lastState = this.renderStates[this.renderStates.length - 1];
-  if (isUndef(lastState)) {
-    return this.done()
-  }
-  switch (lastState.type) {
-    case 'Element':
-      var children = lastState.children;
-    var total = lastState.total;
-      var rendered = lastState.rendered++;
-      if (rendered < total) {
-        this.renderNode(children[rendered], false, this);
-      } else {
+  // eslint-disable-next-line
+  while (true) {
+    var lastState = this.renderStates[this.renderStates.length - 1];
+    if (isUndef(lastState)) {
+      return this.done()
+    }
+    /* eslint-disable no-case-declarations */
+    switch (lastState.type) {
+      case 'Element':
+      case 'Fragment':
+        var children = lastState.children;
+      var total = lastState.total;
+        var rendered = lastState.rendered++;
+        if (rendered < total) {
+          return this.renderNode(children[rendered], false, this)
+        } else {
+          this.renderStates.pop();
+          if (lastState.type === 'Element') {
+            return this.write(lastState.endTag, this.next)
+          }
+        }
+        break
+      case 'Component':
         this.renderStates.pop();
-        this.write(lastState.endTag, this.next);
-      }
-      break
-    case 'Component':
-      this.renderStates.pop();
-      this.activeInstance = lastState.prevActive;
-      this.next();
-      break
-    case 'ComponentWithCache':
-      this.renderStates.pop();
-      var buffer = lastState.buffer;
-    var bufferIndex = lastState.bufferIndex;
-    var componentBuffer = lastState.componentBuffer;
-    var key = lastState.key;
-      var result = {
-        html: buffer[bufferIndex],
-        components: componentBuffer[bufferIndex]
-      };
-      this.cache.set(key, result);
-      if (bufferIndex === 0) {
-        // this is a top-level cached component,
-        // exit caching mode.
-        this.write.caching = false;
-      } else {
-        // parent component is also being cached,
-        // merge self into parent's result
-        buffer[bufferIndex - 1] += result.html;
-        var prev = componentBuffer[bufferIndex - 1];
-        result.components.forEach(function (c) { return prev.add(c); });
-      }
-      buffer.length = bufferIndex;
-      componentBuffer.length = bufferIndex;
-      this.next();
-      break
+        this.activeInstance = lastState.prevActive;
+        break
+      case 'ComponentWithCache':
+        this.renderStates.pop();
+        var buffer = lastState.buffer;
+      var bufferIndex = lastState.bufferIndex;
+      var componentBuffer = lastState.componentBuffer;
+      var key = lastState.key;
+        var result = {
+          html: buffer[bufferIndex],
+          components: componentBuffer[bufferIndex]
+        };
+        this.cache.set(key, result);
+        if (bufferIndex === 0) {
+          // this is a top-level cached component,
+          // exit caching mode.
+          this.write.caching = false;
+        } else {
+          // parent component is also being cached,
+          // merge self into parent's result
+          buffer[bufferIndex - 1] += result.html;
+          var prev = componentBuffer[bufferIndex - 1];
+          result.components.forEach(function (c) { return prev.add(c); });
+        }
+        buffer.length = bufferIndex;
+        componentBuffer.length = bufferIndex;
+        break
+    }
   }
 };
 
@@ -2524,13 +2754,13 @@ function wrapFilter (exp, filter) {
   } else {
     var name = filter.slice(0, i);
     var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
   }
 }
 
 /*  */
 
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
 var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
 var buildRegex = cached(function (delimiters) {
@@ -2578,9 +2808,13 @@ function parseText (
 
 /*  */
 
-function baseWarn (msg) {
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
   console.error(("[Vue compiler]: " + msg));
 }
+/* eslint-enable no-unused-vars */
 
 function pluckModuleFunction (
   modules,
@@ -2591,20 +2825,23 @@ function pluckModuleFunction (
     : []
 }
 
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
 // add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
+function addRawAttr (el, name, value, range) {
   el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
 }
 
 function addDirective (
@@ -2613,58 +2850,82 @@ function addDirective (
   rawName,
   value,
   arg,
-  modifiers
+  isDynamicArg,
+  modifiers,
+  range
 ) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
   el.plain = false;
 }
 
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
 function addHandler (
   el,
   name,
   value,
   modifiers,
   important,
-  warn
+  warn,
+  range,
+  dynamic
 ) {
   modifiers = modifiers || emptyObject;
   // warn prevent and passive modifier
   /* istanbul ignore if */
   if (
-    process.env.NODE_ENV !== 'production' && warn &&
+    warn &&
     modifiers.prevent && modifiers.passive
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     );
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic);
   }
   if (modifiers.once) {
     delete modifiers.once;
-    name = '~' + name; // mark the event as once
+    name = prependModifierMarker('~', name, dynamic);
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
+    name = prependModifierMarker('&', name, dynamic);
   }
 
   var events;
@@ -2675,7 +2936,7 @@ function addHandler (
     events = el.events || (el.events = {});
   }
 
-  var newHandler = { value: value };
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers;
   }
@@ -2693,6 +2954,15 @@ function addHandler (
   el.plain = false;
 }
 
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
 function getBindingAttr (
   el,
   name,
@@ -2736,19 +3006,49 @@ function getAndRemoveAttr (
   return val
 }
 
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
 /*  */
 
 function transformNode (el, options) {
   var warn = options.warn || baseWarn;
   var staticClass = getAndRemoveAttr(el, 'class');
-  if (process.env.NODE_ENV !== 'production' && staticClass) {
+  if (staticClass) {
     var res = parseText(staticClass, options.delimiters);
     if (res) {
       warn(
         "class=\"" + staticClass + "\": " +
         'Interpolation inside attributes has been removed. ' +
         'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
       );
     }
   }
@@ -2785,14 +3085,15 @@ function transformNode$1 (el, options) {
   var staticStyle = getAndRemoveAttr(el, 'style');
   if (staticStyle) {
     /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
+    {
       var res = parseText(staticStyle, options.delimiters);
       if (res) {
         warn(
           "style=\"" + staticStyle + "\": " +
           'Interpolation inside attributes has been removed. ' +
           'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
         );
       }
     }
@@ -2826,31 +3127,19 @@ var style = {
  * Not type-checking this file because it's mostly vendor code.
  */
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
 // Regular Expressions for parsing tags and attributes
 var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
 var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
 var startTagOpen = new RegExp(("^<" + qnameCapture));
 var startTagClose = /^\s*(\/?)>/;
 var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
 var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
 var conditionalComment = /^<!\[/;
 
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
 // Special Elements (can contain anything)
 var isPlainTextElement = makeMap('script,style,textarea', true);
 var reCache = {};
@@ -2861,10 +3150,11 @@ var decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 };
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
 
 // #5992
 var isIgnoreNewlineTag = makeMap('pre,textarea', true);
@@ -2894,7 +3184,7 @@ function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
             }
             advance(commentEnd + 3);
             continue
@@ -2931,7 +3221,7 @@ function parseHTML (html, options) {
         var startTagMatch = parseStartTag();
         if (startTagMatch) {
           handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1);
           }
           continue
@@ -2954,16 +3244,18 @@ function parseHTML (html, options) {
           rest = html.slice(textEnd);
         }
         text = html.substring(0, textEnd);
-        advance(textEnd);
       }
 
       if (textEnd < 0) {
         text = html;
-        html = '';
+      }
+
+      if (text) {
+        advance(text.length);
       }
 
       if (options.chars && text) {
-        options.chars(text);
+        options.chars(text, index - text.length, index);
       }
     } else {
       var endTagLength = 0;
@@ -2973,7 +3265,7 @@ function parseHTML (html, options) {
         endTagLength = endTag.length;
         if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
           text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
             .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
         }
         if (shouldIgnoreFirstNewline(stackedTag, text)) {
@@ -2991,8 +3283,8 @@ function parseHTML (html, options) {
 
     if (html === last) {
       options.chars && options.chars(html);
-      if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+      if (!stack.length && options.warn) {
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
       }
       break
     }
@@ -3016,8 +3308,10 @@ function parseHTML (html, options) {
       };
       advance(start[0].length);
       var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
         advance(attr[0].length);
+        attr.end = index;
         match.attrs.push(attr);
       }
       if (end) {
@@ -3048,12 +3342,6 @@ function parseHTML (html, options) {
     var attrs = new Array(l);
     for (var i = 0; i < l; i++) {
       var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
       var value = args[3] || args[4] || args[5] || '';
       var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -3062,10 +3350,14 @@ function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       };
+      if (options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
       lastTag = tagName;
     }
 
@@ -3079,12 +3371,9 @@ function parseHTML (html, options) {
     if (start == null) { start = index; }
     if (end == null) { end = index; }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -3098,12 +3387,12 @@ function parseHTML (html, options) {
     if (pos >= 0) {
       // Close all the open elements, up the stack
       for (var i = stack.length - 1; i >= pos; i--) {
-        if (process.env.NODE_ENV !== 'production' &&
-          (i > pos || !tagName) &&
+        if (i > pos || !tagName &&
           options.warn
         ) {
           options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
           );
         }
         if (options.end) {
@@ -3148,8 +3437,8 @@ function genComponentModel (
   if (trim) {
     valueExpression =
       "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
   }
   if (number) {
     valueExpression = "_n(" + valueExpression + ")";
@@ -3158,7 +3447,7 @@ function genComponentModel (
 
   el.model = {
     value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
+    expression: JSON.stringify(value),
     callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
   };
 }
@@ -3193,16 +3482,14 @@ function genAssignmentCode (
  *
  */
 
-var len;
-var str;
-var chr;
-var index;
-var expressionPos;
-var expressionEndPos;
+var len, str, chr, index, expressionPos, expressionEndPos;
 
 
 
 function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
   len = val.length;
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
@@ -3282,17 +3569,27 @@ function parseString (chr) {
 /*  */
 
 var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
 var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
 var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
 
 var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE = /[ \f\t\r\n]+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
 
 var decodeHTMLCached = cached(he.decode);
 
+var emptySlotScopeToken = "_empty_";
+
 // configurable state
 var warn$1;
 var delimiters;
@@ -3302,8 +3599,7 @@ var postTransforms;
 var platformIsPreTag;
 var platformMustUseProp;
 var platformGetTagNamespace;
-
-
+var maybeComponent;
 
 function createASTElement (
   tag,
@@ -3315,6 +3611,7 @@ function createASTElement (
     tag: tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent: parent,
     children: []
   }
@@ -3332,7 +3629,13 @@ function parse (
   platformIsPreTag = options.isPreTag || no;
   platformMustUseProp = options.mustUseProp || no;
   platformGetTagNamespace = options.getTagNamespace || no;
-
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  ); };
   transforms = pluckModuleFunction(options.modules, 'transformNode');
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
@@ -3341,20 +3644,67 @@ function parse (
 
   var stack = [];
   var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
   var root;
   var currentParent;
   var inVPre = false;
   var inPre = false;
   var warned = false;
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true;
-      warn$1(msg);
+      warn$1(msg, range);
     }
   }
 
   function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
     // check pre state
     if (element.pre) {
       inVPre = false;
@@ -3368,6 +3718,37 @@ function parse (
     }
   }
 
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
   parseHTML(template, {
     warn: warn$1,
     expectHTML: options.expectHTML,
@@ -3376,7 +3757,8 @@ function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
       // check namespace.
       // inherit parent ns if there is one
       var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
@@ -3392,12 +3774,36 @@ function parse (
         element.ns = ns;
       }
 
+      {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$1(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true;
-        process.env.NODE_ENV !== 'production' && warn$1(
+        warn$1(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
         );
       }
 
@@ -3422,58 +3828,15 @@ function parse (
         processFor(element);
         processIf(element);
         processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
-
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
       }
 
-      // tree management
       if (!root) {
         root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
+        {
+          checkRootConstraints(root);
         }
       }
+
       if (!unary) {
         currentParent = element;
         stack.push(element);
@@ -3482,29 +3845,29 @@ function parse (
       }
     },
 
-    end: function end () {
-      // remove trailing whitespace
+    end: function end (tag, start, end$1) {
       var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
       // pop stack
       stack.length -= 1;
       currentParent = stack[stack.length - 1];
+      if (options.outputSourceRange) {
+        element.end = end$1;
+      }
       closeElement(element);
     },
 
-    chars: function chars (text) {
+    chars: function chars (text, start, end) {
       if (!currentParent) {
-        if (process.env.NODE_ENV !== 'production') {
+        {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start: start }
             );
           } else if ((text = text.trim())) {
             warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
             );
           }
         }
@@ -3519,33 +3882,66 @@ function parse (
         return
       }
       var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
       if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE, ' ');
+        }
         var res;
+        var child;
         if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
+          child = {
             type: 2,
             expression: res.expression,
             tokens: res.tokens,
             text: text
-          });
+          };
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text: text
-          });
+          };
+        }
+        if (child) {
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
         }
       }
     },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
     }
   });
   return root
@@ -3558,14 +3954,19 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
       };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
     }
   } else if (!el.pre) {
     // non root node in pre blocks with no attributes
@@ -3573,27 +3974,53 @@ function processRawAttrs (el) {
   }
 }
 
-function processElement (element, options) {
+function processElement (
+  element,
+  options
+) {
   processKey(element);
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
 
   processRef(element);
-  processSlot(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
   processComponent(element);
   for (var i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element;
   }
   processAttrs(element);
+  return element
 }
 
 function processKey (el) {
   var exp = getBindingAttr(el, 'key');
   if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn$1("<template> cannot be keyed. Place the key on real elements instead.");
+    {
+      if (el.tag === 'template') {
+        warn$1(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$1(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
     }
     el.key = exp;
   }
@@ -3613,14 +4040,17 @@ function processFor (el) {
     var res = parseFor(exp);
     if (res) {
       extend(el, res);
-    } else if (process.env.NODE_ENV !== 'production') {
+    } else {
       warn$1(
-        ("Invalid v-for expression: " + exp)
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
       );
     }
   }
 }
 
+
+
 function parseFor (exp) {
   var inMatch = exp.match(forAliasRE);
   if (!inMatch) { return }
@@ -3629,7 +4059,7 @@ function parseFor (exp) {
   var alias = inMatch[1].trim().replace(stripParensRE, '');
   var iteratorMatch = alias.match(forIteratorRE);
   if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
+    res.alias = alias.replace(forIteratorRE, '').trim();
     res.iterator1 = iteratorMatch[1].trim();
     if (iteratorMatch[2]) {
       res.iterator2 = iteratorMatch[2].trim();
@@ -3666,10 +4096,11 @@ function processIfConditions (el, parent) {
       exp: el.elseif,
       block: el
     });
-  } else if (process.env.NODE_ENV !== 'production') {
+  } else {
     warn$1(
       "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     );
   }
 }
@@ -3680,10 +4111,11 @@ function findPrevElement (children) {
     if (children[i].type === 1) {
       return children[i]
     } else {
-      if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
+      if (children[i].text !== ' ') {
         warn$1(
           "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
+          "will be ignored.",
+          children[i]
         );
       }
       children.pop();
@@ -3705,51 +4137,157 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if (process.env.NODE_ENV !== 'production' && el.key) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (slotScope) {
       warn$1(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
       );
     }
-  } else {
-    var slotScope;
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (el.attrsMap['v-for']) {
+      warn$1(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
     if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn$1(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        {
+          if (el.slotTarget || el.slotScope) {
+            warn$1(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$1(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn$1(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        {
+          if (!maybeComponent(el)) {
+            warn$1(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$1(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$1(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
       }
-      el.slotScope = slotScope;
     }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else {
+      warn$1(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name');
+    if (el.key) {
+      warn$1(
+        "`key` does not work on <slot> because slots are abstract outlets " +
+        "and can possibly expand into multiple elements. " +
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
+      );
     }
   }
 }
@@ -3766,7 +4304,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name;
     value = list[i].value;
@@ -3774,74 +4312,124 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true;
       // modifiers
-      modifiers = parseModifiers(name);
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
       if (modifiers) {
         name = name.replace(modifierRE, '');
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
-        isProp = false;
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          value.trim().length === 0
+        ) {
+          warn$1(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name);
             if (name === 'innerHtml') { name = 'innerHTML'; }
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name);
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$1,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$1,
+                list[i],
+                true // dynamic
+              );
+            }
           }
         }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value);
+          addProp(el, name, value, list[i], isDynamic);
         } else {
-          addAttr(el, name, value);
+          addAttr(el, name, value, list[i], isDynamic);
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$1);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$1, list[i], isDynamic);
       } else { // normal directives
         name = name.replace(dirRE, '');
         // parse arg
         var argMatch = name.match(argRE);
         var arg = argMatch && argMatch[1];
+        isDynamic = false;
         if (arg) {
           name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if (process.env.NODE_ENV !== 'production' && name === 'model') {
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+        if (name === 'model') {
           checkForAliasModel(el, value);
         }
       }
     } else {
       // literal attribute
-      if (process.env.NODE_ENV !== 'production') {
+      {
         var res = parseText(value, delimiters);
         if (res) {
           warn$1(
             name + "=\"" + value + "\": " +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
+      addAttr(el, name, JSON.stringify(value), list[i]);
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+        addProp(el, name, 'true', list[i]);
       }
     }
   }
@@ -3871,10 +4459,9 @@ function makeAttrsMap (attrs) {
   var map = {};
   for (var i = 0, l = attrs.length; i < l; i++) {
     if (
-      process.env.NODE_ENV !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn$1('duplicate attribute: ' + attrs[i].name);
+      warn$1('duplicate attribute: ' + attrs[i].name, attrs[i]);
     }
     map[attrs[i].name] = attrs[i].value;
   }
@@ -3921,7 +4508,8 @@ function checkForAliasModel (el, value) {
         "You are binding v-model directly to a v-for iteration alias. " +
         "This will not be able to modify the v-for source array because " +
         "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
       );
     }
     _el = _el.parent;
@@ -3930,21 +4518,22 @@ function checkForAliasModel (el, value) {
 
 /*  */
 
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
 function preTransformNode (el, options) {
   if (el.tag === 'input') {
     var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
       var ifCondition = getAndRemoveAttr(el, 'v-if', true);
       var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
       var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
@@ -4013,7 +4602,6 @@ var warn$2;
 // so we used some reserved tokens during compile.
 var RANGE_TOKEN = '__r';
 
-
 function model$2 (
   el,
   dir,
@@ -4025,13 +4613,14 @@ function model$2 (
   var tag = el.tag;
   var type = el.attrsMap.type;
 
-  if (process.env.NODE_ENV !== 'production') {
+  {
     // inputs with type="file" are read only and setting the input's
     // value will throw an error.
     if (tag === 'input' && type === 'file') {
       warn$2(
         "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
       );
     }
   }
@@ -4048,17 +4637,10 @@ function model$2 (
     genRadioModel(el, value, modifiers);
   } else if (tag === 'input' || tag === 'textarea') {
     genDefaultModel(el, value, modifiers);
-  } else if (!config.isReservedTag(tag)) {
+  } else {
     genComponentModel(el, value, modifiers);
     // component v-model doesn't need extra runtime
     return false
-  } else if (process.env.NODE_ENV !== 'production') {
-    warn$2(
-      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-      "v-model is not supported on this element type. " +
-      'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
-    );
   }
 
   // ensure runtime directive metadata
@@ -4089,8 +4671,8 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
           '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
     "}else{" + (genAssignmentCode(value, '$$c')) + "}",
     null, true
   );
@@ -4133,13 +4715,16 @@ function genDefaultModel (
   var type = el.attrsMap.type;
 
   // warn if v-bind:value conflicts with v-model
-  if (process.env.NODE_ENV !== 'production') {
+  // except for inputs with v-bind:type
+  {
     var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
       var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
       warn$2(
         binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
       );
     }
   }
@@ -4179,7 +4764,7 @@ function genDefaultModel (
 
 function text (el, dir) {
   if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -4187,7 +4772,7 @@ function text (el, dir) {
 
 function html (el, dir) {
   if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -4214,10 +4799,11 @@ var baseOptions = {
 
 /*  */
 
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 var keyCodes = {
   esc: 27,
   tab: 9,
@@ -4230,6 +4816,23 @@ var keyCodes = {
   'delete': [8, 46]
 };
 
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -4250,37 +4853,45 @@ var modifierCode = {
 
 function genHandlers (
   events,
-  isNative,
-  warn
+  isNative
 ) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
   for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
-function genHandler (
-  name,
-  handler
-) {
+function genHandler (handler) {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
   }
 
   var isMethodPath = simplePathRE.test(handler.value);
   var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
 
   if (!handler.modifiers) {
     if (isMethodPath || isFunctionExpression) {
       return handler.value
     }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
   } else {
     var code = '';
     var genModifierCode = '';
@@ -4312,17 +4923,24 @@ function genHandler (
       code += genModifierCode;
     }
     var handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? ("return " + (handler.value) + ".apply(null, arguments)")
       : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
+        ? ("return (" + (handler.value) + ").apply(null, arguments)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
     return ("function($event){" + code + handlerCode + "}")
   }
 }
 
 function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
 }
 
 function genFilterCode (key) {
@@ -4330,19 +4948,22 @@ function genFilterCode (key) {
   if (keyVal) {
     return ("$event.keyCode!==" + keyVal)
   }
-  var code = keyCodes[key];
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
   return (
     "_k($event.keyCode," +
     (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
   )
 }
 
 /*  */
 
 function on (el, dir) {
-  if (process.env.NODE_ENV !== 'production' && dir.modifiers) {
+  if (dir.modifiers) {
     warn("v-on without argument does not support modifiers.");
   }
   el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
@@ -4366,6 +4987,10 @@ var baseDirectives$1 = {
 
 /*  */
 
+
+
+
+
 var CodegenState = function CodegenState (options) {
   this.options = options;
   this.warn = options.warn || baseWarn;
@@ -4373,19 +4998,21 @@ var CodegenState = function CodegenState (options) {
   this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
   this.directives = extend(extend({}, baseDirectives$1), options.directives);
   var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
   this.onceId = 0;
   this.staticRenderFns = [];
+  this.pre = false;
 };
 
 
 
-function generate$1 (
+function generate (
   ast,
   options
 ) {
   var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
+  // fix #11483, Root level <script> tags should not be rendered.
+  var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
   return {
     render: ("with(this){return " + code + "}"),
     staticRenderFns: state.staticRenderFns
@@ -4393,6 +5020,10 @@ function generate$1 (
 }
 
 function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -4401,7 +5032,7 @@ function genElement (el, state) {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -4411,7 +5042,10 @@ function genElement (el, state) {
     if (el.component) {
       code = genComponent(el.component, el, state);
     } else {
-      var data = el.plain ? undefined : genData$2(el, state);
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
 
       var children = el.inlineTemplate ? null : genChildren(el, state, true);
       code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
@@ -4427,7 +5061,15 @@ function genElement (el, state) {
 // hoist static sub-trees out
 function genStatic (el, state) {
   el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
   state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
   return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
 }
 
@@ -4447,8 +5089,9 @@ function genOnce (el, state) {
       parent = parent.parent;
     }
     if (!key) {
-      process.env.NODE_ENV !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
+      state.warn(
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
       );
       return genElement(el, state)
     }
@@ -4506,8 +5149,7 @@ function genFor (
   var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
   var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
 
-  if (process.env.NODE_ENV !== 'production' &&
-    state.maybeComponent(el) &&
+  if (state.maybeComponent(el) &&
     el.tag !== 'slot' &&
     el.tag !== 'template' &&
     !el.key
@@ -4515,7 +5157,8 @@ function genFor (
     state.warn(
       "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
       "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
+      "See https://v2.vuejs.org/v2/guide/list.html#Maintaining-State for more info.",
+      el.rawAttrsMap['v-for'],
       true /* tip */
     );
   }
@@ -4560,18 +5203,18 @@ function genData$2 (el, state) {
   }
   // attributes
   if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
+    data += "attrs:" + (genProps(el.attrs)) + ",";
   }
   // DOM props
   if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
+    data += "domProps:" + (genProps(el.props)) + ",";
   }
   // event handlers
   if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
+    data += (genHandlers(el.events, false)) + ",";
   }
   if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
+    data += (genHandlers(el.nativeEvents, true)) + ",";
   }
   // slot target
   // only for non-scoped slots
@@ -4580,7 +5223,7 @@ function genData$2 (el, state) {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
   }
   // component v-model
   if (el.model) {
@@ -4594,6 +5237,12 @@ function genData$2 (el, state) {
     }
   }
   data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data);
@@ -4622,7 +5271,7 @@ function genDirectives (el, state) {
     }
     if (needRuntime) {
       hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
     }
   }
   if (hasRuntime) {
@@ -4632,57 +5281,114 @@ function genDirectives (el, state) {
 
 function genInlineTemplate (el, state) {
   var ast = el.children[0];
-  if (process.env.NODE_ENV !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
+  if (el.children.length !== 1 || ast.type !== 1) {
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
   }
-  if (ast.type === 1) {
-    var inlineRenderFns = generate$1(ast, state.options);
+  if (ast && ast.type === 1) {
+    var inlineRenderFns = generate(ast, state.options);
     return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
   }
 }
 
 function genScopedSlots (
+  el,
   slots,
   state
 ) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key,
   el,
   state
 ) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
     "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
 }
 
 function genChildren (
@@ -4701,13 +5407,16 @@ function genChildren (
       el$1.tag !== 'template' &&
       el$1.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el$1, state)
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
     }
-    var normalizationType = checkSkip
+    var normalizationType$1 = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
       : 0;
     var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
   }
 }
 
@@ -4745,7 +5454,7 @@ function needsNormalization (el) {
 function genNode (node, state) {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -4765,8 +5474,15 @@ function genComment (comment) {
 function genSlot (el, state) {
   var slotName = el.slotName || '"default"';
   var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
+  var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
   var bind$$1 = el.attrsMap['v-bind'];
   if ((attrs || bind$$1) && !children) {
     res += ",null";
@@ -4791,15 +5507,23 @@ function genComponent (
 }
 
 function genProps (props) {
-  var res = '';
+  var staticProps = "";
+  var dynamicProps = "";
   for (var i = 0; i < props.length; i++) {
     var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
     }
   }
-  return res.slice(0, -1)
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
 }
 
 // #3895, #4268
@@ -4811,6 +5535,9 @@ function transformSpecialNewlines (text) {
 
 /*  */
 
+
+
+
 var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
 
 // let the model AST transform translate v-model into appropriate
@@ -4890,7 +5617,7 @@ function genClassSegments (
   classBinding
 ) {
   if (staticClass && !classBinding) {
-    return [{ type: RAW, value: (" class=" + staticClass) }]
+    return [{ type: RAW, value: (" class=\"" + (JSON.parse(staticClass)) + "\"") }]
   } else {
     return [{
       type: EXPRESSION,
@@ -4919,16 +5646,6 @@ function genStyleSegments (
 
 /*  */
 
-/**
- * In SSR, the vdom tree is generated only once and never patched, so
- * we can optimize most element / trees into plain string render functions.
- * The SSR optimizer walks the AST tree to detect optimizable elements and trees.
- *
- * The criteria for SSR optimizability is quite a bit looser than static tree
- * detection (which is designed for client re-render). In SSR we bail only for
- * components/slots/custom directives.
- */
-
 // optimizability constants
 var optimizability = {
   FALSE: 0,    // whole sub tree un-optimizable
@@ -5001,6 +5718,7 @@ function optimizeSiblings (el) {
         tag: 'template',
         attrsList: [],
         attrsMap: {},
+        rawAttrsMap: {},
         children: currentOptimizableGroup,
         ssrOptimizability: optimizability.FULL
       });
@@ -5058,16 +5776,15 @@ function isSelectWithModel (node) {
 
 /*  */
 
-// The SSR codegen is essentially extending the default codegen to handle
-// SSR-optimizable nodes and turn them into string render fns. In cases where
-// a node is not optimizable it simply falls back to the default codegen.
+
+
 
 // segment types
 var RAW = 0;
 var INTERPOLATION = 1;
 var EXPRESSION = 2;
 
-function generate (
+function generate$1 (
   ast,
   options
 ) {
@@ -5249,7 +5966,11 @@ function nodesToSegments (
     } else if (c.type === 2) {
       segments.push({ type: INTERPOLATION, value: c.expression });
     } else if (c.type === 3) {
-      segments.push({ type: RAW, value: escape(c.text) });
+      var text = escape(c.text);
+      if (c.isComment) {
+        text = '<!--' + text + '-->';
+      }
+      segments.push({ type: RAW, value: text });
     }
   }
   return segments
@@ -5285,7 +6006,9 @@ function flattenSegments (segments) {
 
 /*  */
 
-// these keywords should not appear inside expressions, but operators like
+
+
+// these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 var prohibitedKeywordRE = new RegExp('\\b' + (
   'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
@@ -5302,96 +6025,170 @@ var unaryOperatorsRE = new RegExp('\\b' + (
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
 // detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
+function detectErrors (ast, warn) {
   if (ast) {
-    checkNode(ast, errors);
+    checkNode(ast, warn);
   }
-  return errors
 }
 
-function checkNode (node, errors) {
+function checkNode (node, warn) {
   if (node.type === 1) {
     for (var name in node.attrsMap) {
       if (dirRE.test(name)) {
         var value = node.attrsMap[name];
         if (value) {
+          var range = node.rawAttrsMap[name];
           if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
           } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
           } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
           }
         }
       }
     }
     if (node.children) {
       for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+        checkNode(node.children[i], warn);
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
+    checkExpression(node.expression, node.text, warn, node);
   }
 }
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
       "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
     );
   }
-  checkExpression(exp, text, errors);
+  checkExpression(exp, text, warn, range);
 }
 
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
 }
 
 function checkIdentifier (
   ident,
   type,
   text,
-  errors
+  warn,
+  range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(("var " + ident + "=_"));
     } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
     }
   }
 }
 
-function checkExpression (exp, text, errors) {
+function checkExpression (exp, text, warn, range) {
   try {
     new Function(("return " + exp));
   } catch (e) {
     var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
     if (keywordMatch) {
-      errors.push(
+      warn(
         "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
       );
     } else {
-      errors.push(
+      warn(
         "invalid expression: " + (e.message) + " in\n\n" +
         "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
       );
     }
   }
 }
 
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
 /*  */
 
+
+
 function createFunction (code, errors) {
   try {
     return new Function(code)
@@ -5414,7 +6211,7 @@ function createCompileToFunctionFn (compile) {
     delete options.warn;
 
     /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
+    {
       // detect possible CSP restriction
       try {
         new Function('return 1');
@@ -5443,16 +6240,30 @@ function createCompileToFunctionFn (compile) {
     var compiled = compile(template, options);
 
     // check compilation errors/tips
-    if (process.env.NODE_ENV !== 'production') {
+    {
       if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
       }
     }
 
@@ -5468,7 +6279,7 @@ function createCompileToFunctionFn (compile) {
     // this should only happen if there is a bug in the compiler itself.
     // mostly for codegen development use
     /* istanbul ignore if */
-    if (process.env.NODE_ENV !== 'production') {
+    {
       if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
         warn$$1(
           "Failed to generate render function:\n\n" +
@@ -5498,11 +6309,29 @@ function createCompilerCreator (baseCompile) {
       var finalOptions = Object.create(baseOptions);
       var errors = [];
       var tips = [];
-      finalOptions.warn = function (msg, tip) {
+
+      var warn = function (msg, range, tip) {
         (tip ? tips : errors).push(msg);
       };
 
       if (options) {
+        if (options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -5523,9 +6352,11 @@ function createCompilerCreator (baseCompile) {
         }
       }
 
-      var compiled = baseCompile(template, finalOptions);
-      if (process.env.NODE_ENV !== 'production') {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
+      {
+        detectErrors(compiled.ast, warn);
       }
       compiled.errors = errors;
       compiled.tips = tips;
@@ -5547,7 +6378,7 @@ var createCompiler = createCompilerCreator(function baseCompile (
 ) {
   var ast = parse(template.trim(), options);
   optimize(ast, options);
-  var code = generate(ast, options);
+  var code = generate$1(ast, options);
   return {
     ast: ast,
     render: code.render,
@@ -5558,6 +6389,7 @@ var createCompiler = createCompilerCreator(function baseCompile (
 /*  */
 
 var ref = createCompiler(baseOptions);
+var compile = ref.compile;
 var compileToFunctions = ref.compileToFunctions;
 
 /*  */
@@ -5649,22 +6481,29 @@ function normalizeArrayChildren (children, nestedIndex) {
 
 /*  */
 
+var ssrHelpers = {
+  _ssrEscape: escape,
+  _ssrNode: renderStringNode,
+  _ssrList: renderStringList,
+  _ssrAttr: renderAttr,
+  _ssrAttrs: renderAttrs$1,
+  _ssrDOMProps: renderDOMProps$1,
+  _ssrClass: renderSSRClass,
+  _ssrStyle: renderSSRStyle
+};
+
 function installSSRHelpers (vm) {
-  if (vm._ssrNode) { return }
-  var Ctor = vm.constructor;
-  while (Ctor.super) {
-    Ctor = Ctor.super;
-  }
-  extend(Ctor.prototype, {
-    _ssrEscape: escape,
-    _ssrNode: renderStringNode$1,
-    _ssrList: renderStringList,
-    _ssrAttr: renderAttr,
-    _ssrAttrs: renderAttrs$1,
-    _ssrDOMProps: renderDOMProps$1,
-    _ssrClass: renderSSRClass,
-    _ssrStyle: renderSSRStyle
-  });
+  if (vm._ssrNode) {
+    return
+  }
+  var Vue = vm.constructor;
+  while (Vue.super) {
+    Vue = Vue.super;
+  }
+  extend(Vue.prototype, ssrHelpers);
+  if (Vue.FunctionalRenderContext) {
+    extend(Vue.FunctionalRenderContext.prototype, ssrHelpers);
+  }
 }
 
 var StringNode = function StringNode (
@@ -5687,7 +6526,7 @@ var StringNode = function StringNode (
   }
 };
 
-function renderStringNode$1 (
+function renderStringNode (
   open,
   close,
   children,
@@ -5723,6 +6562,9 @@ function renderStringList (
 function renderAttrs$1 (obj) {
   var res = '';
   for (var key in obj) {
+    if (isSSRUnsafeAttr(key)) {
+      continue
+    }
     res += renderAttr(key, obj[key]);
   }
   return res
@@ -5743,7 +6585,7 @@ function renderSSRClass (
   staticClass,
   dynamic
 ) {
-  var res = renderClass$1(staticClass, dynamic);
+  var res = renderClass(staticClass, dynamic);
   return res === '' ? res : (" class=\"" + (escape(res)) + "\"")
 }
 
@@ -5762,17 +6604,16 @@ function renderSSRStyle (
 
 /* not type checking this file because flow doesn't play well with Proxy */
 
-if (process.env.NODE_ENV !== 'production') {
+{
   var allowedGlobals = makeMap(
     'Infinity,undefined,NaN,isFinite,isNaN,' +
     'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
     'require' // for Webpack/Browserify
   );
 
   var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    typeof Proxy !== 'undefined' && isNative(Proxy);
 
   if (hasProxy) {
     var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
@@ -5788,8 +6629,6 @@ if (process.env.NODE_ENV !== 'production') {
       }
     });
   }
-
-  
 }
 
 /*  */
@@ -5801,8 +6640,35 @@ var seenObjects = new _Set();
  * getters, so that every nested property inside the object
  * is collected as a "deep" dependency.
  */
+function traverse (val) {
+  _traverse(val, seenObjects);
+  seenObjects.clear();
+}
 
-if (process.env.NODE_ENV !== 'production') {
+function _traverse (val, seen) {
+  var i, keys;
+  var isA = Array.isArray(val);
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
+    return
+  }
+  if (val.__ob__) {
+    var depId = val.__ob__.dep.id;
+    if (seen.has(depId)) {
+      return
+    }
+    seen.add(depId);
+  }
+  if (isA) {
+    i = val.length;
+    while (i--) { _traverse(val[i], seen); }
+  } else {
+    keys = Object.keys(val);
+    i = keys.length;
+    while (i--) { _traverse(val[keys[i]], seen); }
+  }
+}
+
+{
   var perf = inBrowser && window.performance;
   /* istanbul ignore if */
   if (
@@ -5811,9 +6677,7 @@ if (process.env.NODE_ENV !== 'production') {
     perf.measure &&
     perf.clearMarks &&
     perf.clearMeasures
-  ) {
-    
-  }
+  ) ;
 }
 
 /*  */
@@ -5833,7 +6697,7 @@ var normalizeEvent = cached(function (name) {
   }
 });
 
-function createFnInvoker (fns) {
+function createFnInvoker (fns, vm) {
   function invoker () {
     var arguments$1 = arguments;
 
@@ -5841,11 +6705,11 @@ function createFnInvoker (fns) {
     if (Array.isArray(fns)) {
       var cloned = fns.slice();
       for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
     }
   }
   invoker.fns = fns;
@@ -5857,24 +6721,27 @@ function updateListeners (
   oldOn,
   add,
   remove$$1,
+  createOnceHandler,
   vm
 ) {
-  var name, def, cur, old, event;
+  var name, def$$1, cur, old, event;
   for (name in on) {
-    def = cur = on[name];
+    def$$1 = cur = on[name];
     old = oldOn[name];
     event = normalizeEvent(name);
-    /* istanbul ignore if */
     if (isUndef(cur)) {
-      process.env.NODE_ENV !== 'production' && warn(
+      warn(
         "Invalid handler for event \"" + (event.name) + "\": got " + String(cur),
         vm
       );
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+        cur = on[name] = createFnInvoker(cur, vm);
+      }
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
+      add(event.name, cur, event.capture, event.passive, event.params);
     } else if (cur !== old) {
       old.fns = cur;
       on[name] = old;
@@ -5910,7 +6777,7 @@ function extractPropsFromVNodeData (
   if (isDef(attrs) || isDef(props)) {
     for (var key in propOptions) {
       var altKey = hyphenate(key);
-      if (process.env.NODE_ENV !== 'production') {
+      {
         var keyInLowerCase = key.toLowerCase();
         if (
           key !== keyInLowerCase &&
@@ -5960,165 +6827,475 @@ function checkProp (
 
 /*  */
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
-  }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
 
-function createAsyncPlaceholder (
-  factory,
-  data,
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
   context,
+  tag,
+  data,
   children,
-  tag
+  normalizationType,
+  alwaysNormalize
 ) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
+  }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
 ) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
+  if (isDef(data) && isDef((data).__ob__)) {
+    warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
+  }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
+  if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    {
+      warn(
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
+      );
+    }
+  }
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
+    }
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
   }
+}
 
-  if (isDef(factory.resolved)) {
-    return factory.resolved
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
+      }
+    }
   }
+}
 
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
+  }
+  if (isObject(data.class)) {
+    traverse(data.class);
   }
+}
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
+/*  */
 
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
+    }
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
       }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
       }
-    });
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
+  }
+  (ret)._isVList = true;
+  return ret
+}
 
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
+/*  */
 
-    var res = factory(resolve, reject);
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallbackRender,
+  props,
+  bindObject
+) {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) {
+    // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (!isObject(bindObject)) {
+        warn('slot v-bind without argument expects an Object', this);
+      }
+      props = extend(extend({}, bindObject), props);
+    }
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  } else {
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender);
+  }
 
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
+  }
+}
 
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
+/*  */
+
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
+
+/*  */
+
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
+  }
+  return eventKeyCode === undefined
+}
+
+/*  */
+
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
+      }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
         }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
 
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
           }
         }
+      };
 
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
+      for (var key in value) loop( key );
     }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
   }
+  return data
 }
 
 /*  */
 
-/*  */
+/**
+ * Runtime helper for rendering static trees.
+ */
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
+  }
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
+}
 
-/*  */
+/**
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
+ */
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
+
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
+      }
+    }
+  } else {
+    markStaticNode(tree, key, isOnce);
+  }
+}
+
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
 
 /*  */
 
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
+  }
+  return data
+}
+
+/*  */
 
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
+    }
+  }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
+}
 
-var target;
+/*  */
 
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
   }
+  return baseObj
 }
 
-function remove$1 (event, fn) {
-  target.$off(event, fn);
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
 }
 
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
 }
 
 /*  */
@@ -6132,10 +7309,10 @@ function resolveSlots (
   children,
   context
 ) {
-  var slots = {};
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  var slots = {};
   for (var i = 0, l = children.length; i < l; i++) {
     var child = children[i];
     var data = child.data;
@@ -6172,31 +7349,286 @@ function isWhitespace (node) {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
+/*  */
+
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
+}
+
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
 ) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
     }
   }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
   return res
 }
 
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    var vnode = res && res[0];
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
+
 /*  */
 
-var activeInstance = null;
+var currentRenderingInstance = null;
+
+/*  */
+
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
+  }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
+}
+
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
+      } else {
+        owners.length = 0;
+      }
+    });
+
+    var reject = once(function (reason) {
+      warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
+
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
+        }
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                "timeout (" + (res.timeout) + "ms)"
+              );
+            }
+          }, res.timeout);
+        }
+      }
+    }
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
+  }
+}
 
+/*  */
+
+/*  */
+
+/*  */
+
+var target;
 
+function add (event, fn) {
+  target.$on(event, fn);
+}
 
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
 
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
+    }
+  }
+}
 
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
+) {
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
+}
 
+/*  */
 
+var activeInstance = null;
 
 function updateChildComponent (
   vm,
@@ -6205,17 +7637,29 @@ function updateChildComponent (
   parentVnode,
   renderChildren
 ) {
-  if (process.env.NODE_ENV !== 'production') {
-    
-  }
 
   // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  );
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
     renderChildren ||               // has new static slots
     vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
+    hasDynamicScopedSlot
   );
 
   vm.$options._parentVnode = parentVnode;
@@ -6229,549 +7673,152 @@ function updateChildComponent (
   // update $attrs and $listeners hash
   // these are also reactive so they may trigger child update if the child
   // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
   vm.$listeners = listeners || emptyObject;
 
   // update props
   if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
+    toggleObserving(false);
     var props = vm._props;
     var propKeys = vm.$options._propKeys || [];
     for (var i = 0; i < propKeys.length; i++) {
       var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
     }
-    observerState.shouldConvert = true;
+    toggleObserving(true);
     // keep a copy of raw propsData
     vm.$options.propsData = propsData;
   }
 
   // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
+
   // resolve slots + force update if has children
-  if (hasChildren) {
+  if (needsForceUpdate) {
     vm.$slots = resolveSlots(renderChildren, parentVnode.context);
     vm.$forceUpdate();
   }
-
-  if (process.env.NODE_ENV !== 'production') {
-    
-  }
 }
 
 function isInInactiveTree (vm) {
   while (vm && (vm = vm.$parent)) {
     if (vm._inactive) { return true }
-  }
-  return false
-}
-
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
-
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
-
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
-      }
-    }
-  }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
-}
-
-/*  */
-
-
-
-
-var activatedChildren = [];
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
-
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-
-/*  */
-
-/*  */
-
-/*  */
-
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
-
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
-  }
-  return _createElement(context, tag, data, children, normalizationType)
-}
-
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
-) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
-  }
-  // warn against non-primitive key
-  if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    {
-      warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
-      );
-    }
-  }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
-  }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
-  }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
-    }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
-  }
-}
-
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
-      }
-    }
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
-        );
-      }
-      slotNodes._rendered = true;
-    }
-    nodes = slotNodes || fallback;
-  }
-
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
-
-/*  */
-
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
-  }
-}
-
-/*  */
-
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
-
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
-
-      for (var key in value) loop( key );
-    }
-  }
-  return data
-}
-
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
-) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
+  }
+  return false
 }
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
+    return
+  }
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
+  }
 }
 
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
-      }
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
   }
 }
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
 }
 
 /*  */
 
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
   }
-  return data
 }
 
-/*  */
-
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
 }
 
 /*  */
 
 /*  */
 
-
-
-
+/*  */
 
 function resolveInject (inject, vm) {
   if (inject) {
     // inject is :any because flow is not smart enough to figure out cached
     var result = Object.create(null);
     var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
+      ? Reflect.ownKeys(inject)
       : Object.keys(inject);
 
     for (var i = 0; i < keys.length; i++) {
       var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
       var provideKey = inject[key].from;
       var source = vm;
       while (source) {
-        if (source._provided && provideKey in source._provided) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
           result[key] = source._provided[provideKey];
           break
         }
@@ -6783,7 +7830,7 @@ function resolveInject (inject, vm) {
           result[key] = typeof provideDefault === 'function'
             ? provideDefault.call(vm)
             : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
+        } else {
           warn(("Injection \"" + key + "\" not found"), vm);
         }
       }
@@ -6794,10 +7841,6 @@ function resolveInject (inject, vm) {
 
 /*  */
 
-
-
-
-
 function resolveConstructorOptions (Ctor) {
   var options = Ctor.options;
   if (Ctor.super) {
@@ -6825,36 +7868,16 @@ function resolveConstructorOptions (Ctor) {
 function resolveModifiedOptions (Ctor) {
   var modified;
   var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
   var sealed = Ctor.sealedOptions;
   for (var key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+      modified[key] = latest[key];
     }
   }
   return modified
 }
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
 /*  */
 
 function FunctionalRenderContext (
@@ -6864,20 +7887,49 @@ function FunctionalRenderContext (
   parent,
   Ctor
 ) {
+  var this$1 = this;
+
   var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
   this.data = data;
   this.props = props;
   this.children = children;
   this.parent = parent;
   this.listeners = data.on || emptyObject;
   this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
 
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
 
   // support for compiled functional template
   if (isCompiled) {
@@ -6885,13 +7937,13 @@ function FunctionalRenderContext (
     this.$options = options;
     // pre-resolve slots for renderSlot()
     this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
   }
 
   if (options._scopeId) {
     this._c = function (a, b, c, d) {
       var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
+      if (vnode && !Array.isArray(vnode)) {
         vnode.fnScopeId = options._scopeId;
         vnode.fnContext = parent;
       }
@@ -6934,14 +7986,31 @@ function createFunctionalComponent (
   var vnode = options.render.call(null, renderContext._c, renderContext);
 
   if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
     }
+    return res
   }
+}
 
-  return vnode
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
 }
 
 function mergeProps (to, from) {
@@ -6952,45 +8021,29 @@ function mergeProps (to, from) {
 
 /*  */
 
-
-
-
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
-
-
-// Updates the state of the component to weex native render engine.
-
 /*  */
 
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
-
-// listening on native callback
-
 /*  */
 
 /*  */
 
-// hooks to be invoked on component VNodes during patch
+// inline hooks to be invoked on component VNodes during patch
 var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
       var child = vnode.componentInstance = createComponentInstanceForVnode(
         vnode,
-        activeInstance,
-        parentElm,
-        refElm
+        activeInstance
       );
       child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     }
   },
 
@@ -7062,7 +8115,7 @@ function createComponent (
   // if at this stage it's not a constructor or an async component factory,
   // reject.
   if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
+    {
       warn(("Invalid Component definition: " + (String(Ctor))), context);
     }
     return
@@ -7072,7 +8125,7 @@ function createComponent (
   var asyncFactory;
   if (isUndef(Ctor.cid)) {
     asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
     if (Ctor === undefined) {
       // return a placeholder node for async component, which is rendered
       // as a comment node but preserves all the raw information for the node.
@@ -7125,8 +8178,8 @@ function createComponent (
     }
   }
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
 
   // return a placeholder vnode
   var name = Ctor.options.name || tag;
@@ -7137,25 +8190,19 @@ function createComponent (
     asyncFactory
   );
 
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
   return vnode
 }
 
 function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode,
+  // activeInstance in lifecycle state
+  parent
 ) {
   var options = {
     _isComponent: true,
-    parent: parent,
     _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
+    parent: parent
   };
   // check inline-template render functions
   var inlineTemplate = vnode.data.inlineTemplate;
@@ -7166,35 +8213,47 @@ function createComponentInstanceForVnode (
   return new vnode.componentOptions.Ctor(options)
 }
 
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
-  }
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
   for (var i = 0; i < hooksToMerge.length; i++) {
     var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
   }
 }
 
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
-  }
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
 }
 
 // transform component v-model info (value and callback) into
 // prop and event handler respectively.
 function transformModel (options, data) {
   var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
   var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
+    }
   } else {
-    on[event] = data.model.callback;
+    on[event] = callback;
   }
 }
 
@@ -7204,6 +8263,7 @@ var warned = Object.create(null);
 var warnOnce = function (msg) {
   if (!warned[msg]) {
     warned[msg] = true;
+    // eslint-disable-next-line no-console
     console.warn(("\n\u001b[31m" + msg + "\u001b[39m\n"));
   }
 };
@@ -7235,9 +8295,30 @@ var normalizeRender = function (vm) {
   }
 };
 
+function waitForServerPrefetch (vm, resolve, reject) {
+  var handlers = vm.$options.serverPrefetch;
+  if (isDef(handlers)) {
+    if (!Array.isArray(handlers)) { handlers = [handlers]; }
+    try {
+      var promises = [];
+      for (var i = 0, j = handlers.length; i < j; i++) {
+        var result = handlers[i].call(vm, vm);
+        if (result && typeof result.then === 'function') {
+          promises.push(result);
+        }
+      }
+      Promise.all(promises).then(resolve).catch(reject);
+      return
+    } catch (e) {
+      reject(e);
+    }
+  }
+  resolve();
+}
+
 function renderNode (node, isRoot, context) {
   if (node.isString) {
-    renderStringNode(node, context);
+    renderStringNode$1(node, context);
   } else if (isDef(node.componentOptions)) {
     renderComponent(node, isRoot, context);
   } else if (isDef(node.tag)) {
@@ -7280,7 +8361,12 @@ function renderComponent (node, isRoot, context) {
   var registerComponent = registerComponentForCache(Ctor.options, write);
 
   if (isDef(getKey) && isDef(cache) && isDef(name)) {
-    var key = name + '::' + getKey(node.componentOptions.propsData);
+    var rawKey = getKey(node.componentOptions.propsData);
+    if (rawKey === false) {
+      renderComponentInner(node, isRoot, context);
+      return
+    }
+    var key = name + '::' + rawKey;
     var has = context.has;
     var get = context.get;
     if (isDef(has)) {
@@ -7353,13 +8439,20 @@ function renderComponentInner (node, isRoot, context) {
     context.activeInstance
   );
   normalizeRender(child);
-  var childNode = child._render();
-  childNode.parent = node;
-  context.renderStates.push({
-    type: 'Component',
-    prevActive: prevActive
-  });
-  renderNode(childNode, isRoot, context);
+
+  var resolve = function () {
+    var childNode = child._render();
+    childNode.parent = node;
+    context.renderStates.push({
+      type: 'Component',
+      prevActive: prevActive
+    });
+    renderNode(childNode, isRoot, context);
+  };
+
+  var reject = context.done;
+
+  waitForServerPrefetch(child, resolve, reject);
 }
 
 function renderAsyncComponent (node, isRoot, context) {
@@ -7382,7 +8475,22 @@ function renderAsyncComponent (node, isRoot, context) {
       tag
     );
     if (resolvedNode) {
-      renderComponent(resolvedNode, isRoot, context);
+      if (resolvedNode.componentOptions) {
+        // normal component
+        renderComponent(resolvedNode, isRoot, context);
+      } else if (!Array.isArray(resolvedNode)) {
+        // single return node from functional component
+        renderNode(resolvedNode, isRoot, context);
+      } else {
+        // multiple return nodes from functional component
+        context.renderStates.push({
+          type: 'Fragment',
+          children: resolvedNode,
+          rendered: 0,
+          total: resolvedNode.length
+        });
+        context.next();
+      }
     } else {
       // invalid component, but this does not throw on the client
       // so render empty comment node
@@ -7415,7 +8523,7 @@ function renderAsyncComponent (node, isRoot, context) {
   }
 }
 
-function renderStringNode (el, context) {
+function renderStringNode$1 (el, context) {
   var write = context.write;
   var next = context.next;
   if (isUndef(el.children) || el.children.length === 0) {
@@ -7424,9 +8532,10 @@ function renderStringNode (el, context) {
     var children = el.children;
     context.renderStates.push({
       type: 'Element',
+      children: children,
       rendered: 0,
       total: children.length,
-      endTag: el.close, children: children
+      endTag: el.close
     });
     write(el.open, next);
   }
@@ -7456,9 +8565,10 @@ function renderElement (el, isRoot, context) {
     var children = el.children;
     context.renderStates.push({
       type: 'Element',
+      children: children,
       rendered: 0,
       total: children.length,
-      endTag: endTag, children: children
+      endTag: endTag
     });
     write(startTag, next);
   }
@@ -7501,11 +8611,13 @@ function renderStartingTag (node, context) {
     if (dirs) {
       for (var i = 0; i < dirs.length; i++) {
         var name = dirs[i].name;
-        var dirRenderer = directives[name];
-        if (dirRenderer && name !== 'show') {
-          // directives mutate the node's data
-          // which then gets rendered by modules
-          dirRenderer(node, dirs[i]);
+        if (name !== 'show') {
+          var dirRenderer = resolveAsset(context, 'directives', name);
+          if (dirRenderer) {
+            // directives mutate the node's data
+            // which then gets rendered by modules
+            dirRenderer(node, dirs[i]);
+          }
         }
       }
     }
@@ -7568,7 +8680,11 @@ function createRenderFunction (
     });
     installSSRHelpers(component);
     normalizeRender(component);
-    renderNode(component._render(), true, context);
+
+    var resolve = function () {
+      renderNode(component._render(), true, context);
+    };
+    waitForServerPrefetch(component, resolve, done);
   }
 }
 
@@ -7597,7 +8713,7 @@ var Transform = require('stream').Transform;
 
 
 
-var TemplateStream = (function (Transform) {
+var TemplateStream = /*@__PURE__*/(function (Transform) {
   function TemplateStream (
     renderer,
     template,
@@ -7760,8 +8876,12 @@ function mapIdToFile (id, clientManifest) {
   if (fileIndices) {
     fileIndices.forEach(function (index) {
       var file = clientManifest.all[index];
-      // only include async files or non-js assets
-      if (clientManifest.async.indexOf(file) > -1 || !(/\.js($|\?)/.test(file))) {
+      // only include async files or non-js, non-css assets
+      if (
+        file &&
+        (clientManifest.async.indexOf(file) > -1 ||
+          !/\.(js|css)($|\?)/.test(file))
+      ) {
         files.push(file);
       }
     });
@@ -7774,19 +8894,39 @@ function mapIdToFile (id, clientManifest) {
 var path = require('path');
 var serialize = require('serialize-javascript');
 
+
+
+
+
+
+
+
+
 var TemplateRenderer = function TemplateRenderer (options) {
   this.options = options;
   this.inject = options.inject !== false;
   // if no template option is provided, the renderer is created
   // as a utility object for rendering assets like preload links and scripts.
-  this.parsedTemplate = options.template
-    ? parseTemplate(options.template)
+    
+  var template = options.template;
+  this.parsedTemplate = template
+    ? typeof template === 'string'
+      ? parseTemplate(template)
+      : template
     : null;
 
+  // function used to serialize initial state JSON
+  this.serialize = options.serializer || (function (state) {
+    return serialize(state, { isJSON: true })
+  });
+
   // extra functionality with client manifest
   if (options.clientManifest) {
     var clientManifest = this.clientManifest = options.clientManifest;
-    this.publicPath = clientManifest.publicPath.replace(/\/$/, '');
+    // ensure publicPath ends with /
+    this.publicPath = clientManifest.publicPath === ''
+      ? ''
+      : clientManifest.publicPath.replace(/([^\/])$/, '$1/');
     // preload/prefetch directives
     this.preloadFiles = (clientManifest.initial || []).map(normalizeFile);
     this.prefetchFiles = (clientManifest.async || []).map(normalizeFile);
@@ -7796,7 +8936,8 @@ var TemplateRenderer = function TemplateRenderer (options) {
 };
 
 TemplateRenderer.prototype.bindRenderFns = function bindRenderFns (context) {
-  var renderer = this;['ResourceHints', 'State', 'Scripts', 'Styles'].forEach(function (type) {
+  var renderer = this
+  ;['ResourceHints', 'State', 'Scripts', 'Styles'].forEach(function (type) {
     context[("render" + type)] = renderer[("render" + type)].bind(renderer, context);
   });
   // also expose getPreloadFiles, useful for HTTP/2 push
@@ -7804,12 +8945,17 @@ TemplateRenderer.prototype.bindRenderFns = function bindRenderFns (context) {
 };
 
 // render synchronously given rendered app content and render context
-TemplateRenderer.prototype.renderSync = function renderSync (content, context) {
+TemplateRenderer.prototype.render = function render (content, context) {
   var template = this.parsedTemplate;
   if (!template) {
-    throw new Error('renderSync cannot be called without a template.')
+    throw new Error('render cannot be called without a template.')
   }
   context = context || {};
+
+  if (typeof template === 'function') {
+    return template(content, context)
+  }
+
   if (this.inject) {
     return (
       template.head(context) +
@@ -7835,13 +8981,21 @@ TemplateRenderer.prototype.renderSync = function renderSync (content, context) {
 TemplateRenderer.prototype.renderStyles = function renderStyles (context) {
     var this$1 = this;
 
-  var cssFiles = this.clientManifest
-    ? this.clientManifest.all.filter(isCSS)
-    : [];
+  var initial = this.preloadFiles || [];
+  var async = this.getUsedAsyncFiles(context) || [];
+  var cssFiles = initial.concat(async).filter(function (ref) {
+      var file = ref.file;
+
+      return isCSS(file);
+    });
   return (
     // render links for css files
     (cssFiles.length
-      ? cssFiles.map(function (file) { return ("<link rel=\"stylesheet\" href=\"" + (this$1.publicPath) + "/" + file + "\">"); }).join('')
+      ? cssFiles.map(function (ref) {
+          var file = ref.file;
+
+          return ("<link rel=\"stylesheet\" href=\"" + (this$1.publicPath) + file + "\">");
+    }).join('')
       : '') +
     // context.styles is a getter exposed by vue-style-loader which contains
     // the inline component styles collected during SSR
@@ -7886,7 +9040,7 @@ TemplateRenderer.prototype.renderPreloadLinks = function renderPreloadLinks (con
       if (asType === 'font') {
         extra = " type=\"font/" + extension + "\" crossorigin";
       }
-      return ("<link rel=\"preload\" href=\"" + (this$1.publicPath) + "/" + file + "\"" + (asType !== '' ? (" as=\"" + asType + "\"") : '') + extra + ">")
+      return ("<link rel=\"preload\" href=\"" + (this$1.publicPath) + file + "\"" + (asType !== '' ? (" as=\"" + asType + "\"") : '') + extra + ">")
     }).join('')
   } else {
     return ''
@@ -7913,7 +9067,7 @@ TemplateRenderer.prototype.renderPrefetchLinks = function renderPrefetchLinks (c
       if (alreadyRendered(file)) {
         return ''
       }
-      return ("<link rel=\"prefetch\" href=\"" + (this$1.publicPath) + "/" + file + "\">")
+      return ("<link rel=\"prefetch\" href=\"" + (this$1.publicPath) + file + "\">")
     }).join('')
   } else {
     return ''
@@ -7924,12 +9078,11 @@ TemplateRenderer.prototype.renderState = function renderState (context, options)
   var ref = options || {};
     var contextKey = ref.contextKey; if ( contextKey === void 0 ) contextKey = 'state';
     var windowKey = ref.windowKey; if ( windowKey === void 0 ) windowKey = '__INITIAL_STATE__';
-  var state = serialize(context[contextKey], { isJSON: true });
-  var autoRemove = process.env.NODE_ENV === 'production'
-    ? ';(function(){var s;(s=document.currentScript||document.scripts[document.scripts.length-1]).parentNode.removeChild(s);}());'
-    : '';
+  var state = this.serialize(context[contextKey]);
+  var autoRemove = '';
+  var nonceAttr = context.nonce ? (" nonce=\"" + (context.nonce) + "\"") : '';
   return context[contextKey]
-    ? ("<script>window." + windowKey + "=" + state + autoRemove + "</script>")
+    ? ("<script" + nonceAttr + ">window." + windowKey + "=" + state + autoRemove + "</script>")
     : ''
 };
 
@@ -7937,17 +9090,21 @@ TemplateRenderer.prototype.renderScripts = function renderScripts (context) {
     var this$1 = this;
 
   if (this.clientManifest) {
-    var initial = this.preloadFiles;
-    var async = this.getUsedAsyncFiles(context);
-    var needed = [initial[0]].concat(async || [], initial.slice(1));
-    return needed.filter(function (ref) {
+    var initial = this.preloadFiles.filter(function (ref) {
+        var file = ref.file;
+
+        return isJS(file);
+      });
+    var async = (this.getUsedAsyncFiles(context) || []).filter(function (ref) {
         var file = ref.file;
 
         return isJS(file);
-      }).map(function (ref) {
+      });
+    var needed = [initial[0]].concat(async, initial.slice(1));
+    return needed.map(function (ref) {
         var file = ref.file;
 
-      return ("<script src=\"" + (this$1.publicPath) + "/" + file + "\" defer></script>")
+      return ("<script src=\"" + (this$1.publicPath) + file + "\" defer></script>")
     }).join('')
   } else {
     return ''
@@ -7998,7 +9155,14 @@ function getPreloadType (ext) {
 
 /*  */
 
-function createRenderer$1 (ref) {
+
+
+
+
+
+
+
+function createRenderer (ref) {
   if ( ref === void 0 ) ref = {};
   var modules = ref.modules; if ( modules === void 0 ) modules = [];
   var directives = ref.directives; if ( directives === void 0 ) directives = {};
@@ -8009,6 +9173,7 @@ function createRenderer$1 (ref) {
   var shouldPreload = ref.shouldPreload;
   var shouldPrefetch = ref.shouldPrefetch;
   var clientManifest = ref.clientManifest;
+  var serializer = ref.serializer;
 
   var render = createRenderFunction(modules, directives, isUnaryTag, cache);
   var templateRenderer = new TemplateRenderer({
@@ -8016,7 +9181,8 @@ function createRenderer$1 (ref) {
     inject: inject,
     shouldPreload: shouldPreload,
     shouldPrefetch: shouldPrefetch,
-    clientManifest: clientManifest
+    clientManifest: clientManifest,
+    serializer: serializer
   });
 
   return {
@@ -8025,6 +9191,8 @@ function createRenderer$1 (ref) {
       context,
       cb
     ) {
+      var assign;
+
       if (typeof context === 'function') {
         cb = context;
         context = {};
@@ -8036,7 +9204,6 @@ function createRenderer$1 (ref) {
       // no callback, return Promise
       var promise;
       if (!cb) {
-        var assign;
         ((assign = createPromiseCallback(), promise = assign.promise, cb = assign.cb));
       }
 
@@ -8047,11 +9214,26 @@ function createRenderer$1 (ref) {
       }, cb);
       try {
         render(component, write, context, function (err) {
-          if (template) {
-            result = templateRenderer.renderSync(result, context);
-          }
           if (err) {
-            cb(err);
+            return cb(err)
+          }
+          if (context && context.rendered) {
+            context.rendered(context);
+          }
+          if (template) {
+            try {
+              var res = templateRenderer.render(result, context);
+              if (typeof res !== 'string') {
+                // function template returning promise
+                res
+                  .then(function (html) { return cb(null, html); })
+                  .catch(cb);
+              } else {
+                cb(null, res);
+              }
+            } catch (e) {
+              cb(e);
+            }
           } else {
             cb(null, result);
           }
@@ -8074,13 +9256,27 @@ function createRenderer$1 (ref) {
         render(component, write, context, done);
       });
       if (!template) {
+        if (context && context.rendered) {
+          var rendered = context.rendered;
+          renderStream.once('beforeEnd', function () {
+            rendered(context);
+          });
+        }
         return renderStream
+      } else if (typeof template === 'function') {
+        throw new Error("function template is only supported in renderToString.")
       } else {
         var templateStream = templateRenderer.createStream(context);
         renderStream.on('error', function (err) {
           templateStream.emit('error', err);
         });
         renderStream.pipe(templateStream);
+        if (context && context.rendered) {
+          var rendered$1 = context.rendered;
+          renderStream.once('beforeEnd', function () {
+            rendered$1(context);
+          });
+        }
         return templateStream
       }
     }
@@ -8088,7 +9284,7 @@ function createRenderer$1 (ref) {
 }
 
 var vm = require('vm');
-var path$2 = require('path');
+var path$1 = require('path');
 var resolve = require('resolve');
 var NativeModule = require('module');
 
@@ -8140,7 +9336,7 @@ function compileModule (files, basedir, runInNewContext) {
       : script.runInNewContext(sandbox);
     var m = { exports: {}};
     var r = function (file) {
-      file = path$2.posix.join('.', file);
+      file = path$1.posix.join('.', file);
       if (files[file]) {
         return evaluateModule(file, sandbox, evaluatedFiles)
       } else if (basedir) {
@@ -8293,7 +9489,7 @@ function rewriteTraceLine (trace, mapConsumers) {
 /*  */
 
 var fs = require('fs');
-var path$1 = require('path');
+var path$2 = require('path');
 var PassThrough = require('stream').PassThrough;
 
 var INVALID_MSG =
@@ -8321,11 +9517,11 @@ function createBundleRendererCreator (
     if (
       typeof bundle === 'string' &&
       /\.js(on)?$/.test(bundle) &&
-      path$1.isAbsolute(bundle)
+      path$2.isAbsolute(bundle)
     ) {
       if (fs.existsSync(bundle)) {
         var isJSON = /\.json$/.test(bundle);
-        basedir = basedir || path$1.dirname(bundle);
+        basedir = basedir || path$2.dirname(bundle);
         bundle = fs.readFileSync(bundle, 'utf-8');
         if (isJSON) {
           try {
@@ -8366,6 +9562,8 @@ function createBundleRendererCreator (
 
     return {
       renderToString: function (context, cb) {
+        var assign;
+
         if (typeof context === 'function') {
           cb = context;
           context = {};
@@ -8373,7 +9571,6 @@ function createBundleRendererCreator (
 
         var promise;
         if (!cb) {
-          var assign;
           ((assign = createPromiseCallback(), promise = assign.promise, cb = assign.cb));
         }
 
@@ -8434,10 +9631,10 @@ function createBundleRendererCreator (
 
 process.env.VUE_ENV = 'server';
 
-function createRenderer$$1 (options) {
+function createRenderer$1 (options) {
   if ( options === void 0 ) options = {};
 
-  return createRenderer$1(extend(extend({}, options), {
+  return createRenderer(extend(extend({}, options), {
     isUnaryTag: isUnaryTag,
     canBeLeftOpenTag: canBeLeftOpenTag,
     modules: modules,
@@ -8447,7 +9644,7 @@ function createRenderer$$1 (options) {
   }))
 }
 
-var createBundleRenderer = createBundleRendererCreator(createRenderer$$1);
+var createBundleRenderer = createBundleRendererCreator(createRenderer$1);
 
-exports.createRenderer = createRenderer$$1;
+exports.createRenderer = createRenderer$1;
 exports.createBundleRenderer = createBundleRenderer;
diff --git a/packages/vue-server-renderer/build.prod.js b/packages/vue-server-renderer/build.prod.js
new file mode 100644
index 00000000000..01a786d489f
--- /dev/null
+++ b/packages/vue-server-renderer/build.prod.js
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r=this.renderer.renderScripts(this.context);r&&this.push(r)}this.push(this.template.tail(this.context)),e()},t}(require("stream").Transform),lo=require("lodash.template"),fo={escape:/{{([^{][\s\S]+?[^}])}}/g,interpolate:/{{{([\s\S]+?)}}}/g};function po(e){var t=function(e){var t=new Map;return Object.keys(e.modules).forEach(function(r){t.set(r,function(e,t){var r=[],n=t.modules[e];return n&&n.forEach(function(e){var n=t.all[e];n&&(t.async.indexOf(n)>-1||!/\.(js|css)($|\?)/.test(n))&&r.push(n)}),r}(r,e))}),t}(e);return function(e){for(var r=new Set,n=0;n<e.length;n++){var i=t.get(e[n]);if(i)for(var o=0;o<i.length;o++)r.add(i[o])}return Array.from(r)}}var vo=require("path"),ho=require("serialize-javascript"),mo=function(e){this.options=e,this.inject=!1!==e.inject;var t=e.template;if(this.parsedTemplate=t?"string"==typeof t?function(e,t){if(void 0===t&&(t="\x3c!--vue-ssr-outlet--\x3e"),"object"==typeof e)return e;var r=e.indexOf("</head>"),n=e.indexOf(t);if(n<0)throw new Error("Content placeholder not found in template.");return r<0&&(r=e.indexOf("<body>"))<0&&(r=n),{head:lo(e.slice(0,r),fo),neck:lo(e.slice(r,n),fo),tail:lo(e.slice(n+t.length),fo)}}(t):t:null,this.serialize=e.serializer||function(e){return ho(e,{isJSON:!0})},e.clientManifest){var r=this.clientManifest=e.clientManifest;this.publicPath=""===r.publicPath?"":r.publicPath.replace(/([^\/])$/,"$1/"),this.preloadFiles=(r.initial||[]).map(yo),this.prefetchFiles=(r.async||[]).map(yo),this.mapFiles=po(r)}};function yo(e){var t=e.replace(/\?.*/,""),r=vo.extname(t).slice(1);return{file:e,extension:r,fileWithoutQuery:t,asType:go(r)}}function go(e){return"js"===e?"script":"css"===e?"style":/jpe?g|png|svg|gif|webp|ico/.test(e)?"image":/woff2?|ttf|otf|eot/.test(e)?"font":""}mo.prototype.bindRenderFns=function(e){var t=this;["ResourceHints","State","Scripts","Styles"].forEach(function(r){e["render"+r]=t["render"+r].bind(t,e)}),e.getPreloadFiles=t.getPreloadFiles.bind(t,e)},mo.prototype.render=function(e,t){var r=this.parsedTemplate;if(!r)throw new Error("render cannot be called without a template.");return t=t||{},"function"==typeof r?r(e,t):this.inject?r.head(t)+(t.head||"")+this.renderResourceHints(t)+this.renderStyles(t)+r.neck(t)+e+this.renderState(t)+this.renderScripts(t)+r.tail(t):r.head(t)+r.neck(t)+e+r.tail(t)},mo.prototype.renderStyles=function(e){var t=this,r=this.preloadFiles||[],n=this.getUsedAsyncFiles(e)||[],i=r.concat(n).filter(function(e){return function(e){return/\.css(\?[^.]+)?$/.test(e)}(e.file)});return(i.length?i.map(function(e){var r=e.file;return'<link rel="stylesheet" href="'+t.publicPath+r+'">'}).join(""):"")+(e.styles||"")},mo.prototype.renderResourceHints=function(e){return this.renderPreloadLinks(e)+this.renderPrefetchLinks(e)},mo.prototype.getPreloadFiles=function(e){var t=this.getUsedAsyncFiles(e);return this.preloadFiles||t?(this.preloadFiles||[]).concat(t||[]):[]},mo.prototype.renderPreloadLinks=function(e){var t=this,r=this.getPreloadFiles(e),n=this.options.shouldPreload;return r.length?r.map(function(e){var r=e.file,i=e.extension,o=e.fileWithoutQuery,a=e.asType,s="";return n||"script"===a||"style"===a?n&&!n(o,a)?"":("font"===a&&(s=' type="font/'+i+'" crossorigin'),'<link rel="preload" href="'+t.publicPath+r+'"'+(""!==a?' as="'+a+'"':"")+s+">"):""}).join(""):""},mo.prototype.renderPrefetchLinks=function(e){var t=this,r=this.options.shouldPrefetch;if(this.prefetchFiles){var n=this.getUsedAsyncFiles(e);return this.prefetchFiles.map(function(e){var i=e.file,o=e.fileWithoutQuery,a=e.asType;return r&&!r(o,a)?"":function(e){return n&&n.some(function(t){return t.file===e})}(i)?"":'<link rel="prefetch" href="'+t.publicPath+i+'">'}).join("")}return""},mo.prototype.renderState=function(e,t){var r=t||{},n=r.contextKey;void 0===n&&(n="state");var i=r.windowKey;void 0===i&&(i="__INITIAL_STATE__");var o=this.serialize(e[n]),a=e.nonce?' nonce="'+e.nonce+'"':"";return e[n]?"<script"+a+">window."+i+"="+o+";(function(){var s;(s=document.currentScript||document.scripts[document.scripts.length-1]).parentNode.removeChild(s);}());<\/script>":""},mo.prototype.renderScripts=function(e){var t=this;if(this.clientManifest){var r=this.preloadFiles.filter(function(e){var t=e.file;return so(t)}),n=(this.getUsedAsyncFiles(e)||[]).filter(function(e){var t=e.file;return so(t)});return[r[0]].concat(n,r.slice(1)).map(function(e){var r=e.file;return'<script src="'+t.publicPath+r+'" defer><\/script>'}).join("")}return""},mo.prototype.getUsedAsyncFiles=function(e){if(!e._mappedFiles&&e._registeredComponents&&this.mapFiles){var t=Array.from(e._registeredComponents);e._mappedFiles=this.mapFiles(t).map(yo)}return e._mappedFiles},mo.prototype.createStream=function(e){if(!this.parsedTemplate)throw new Error("createStream cannot be called without a template.");return new uo(this,this.parsedTemplate,e||{})};var bo=require("vm"),_o=require("path"),wo=require("resolve"),xo=require("module");function So(e){var t={Buffer:Buffer,console:console,process:process,setTimeout:setTimeout,setInterval:setInterval,setImmediate:setImmediate,clearTimeout:clearTimeout,clearInterval:clearInterval,clearImmediate:clearImmediate,__VUE_SSR_CONTEXT__:e};return t.global=t,t}function $o(e,t,r){var n={},i={};return function o(a,s,c){if(void 0===c&&(c={}),c[a])return c[a];var u=function(t){if(n[t])return n[t];var r=e[t],i=xo.wrap(r),o=new bo.Script(i,{filename:t,displayErrors:!0});return n[t]=o,o}(a),l={exports:{}};(!1===r?u.runInThisContext():u.runInNewContext(s)).call(l.exports,l.exports,function(r){return r=_o.posix.join(".",r),e[r]?o(r,s,c):t?require(i[r]||(i[r]=wo.sync(r,{basedir:t}))):require(r)},l);var f=Object.prototype.hasOwnProperty.call(l.exports,"default")?l.exports.default:l.exports;return c[a]=f,f}}function Ao(e,t,r,n){var i,o,a=$o(t,r,n);return!1!==n&&"once"!==n?function(t){return void 0===t&&(t={}),new Promise(function(r){t._registeredComponents=new Set;var n=a(e,So(t));r("function"==typeof n?n(t):n)})}:function(t){return void 0===t&&(t={}),new Promise(function(r){if(!i){var s="once"===n?So():global;if(o=s.__VUE_SSR_CONTEXT__={},i=a(e,s),delete s.__VUE_SSR_CONTEXT__,"function"!=typeof i)throw new Error("bundle export should be a function when using { runInNewContext: false }.")}if(t._registeredComponents=new Set,o._styles){t._styles=function e(t){if(u(t)){var r={};for(var n in t)r[n]=e(t[n]);return r}return Array.isArray(t)?t.slice():t}(o._styles);var c=o._renderStyles;c&&Object.defineProperty(t,"styles",{enumerable:!0,get:function(){return c(t._styles)}})}r(i(t))})}}var Oo=require("source-map").SourceMapConsumer,ko=/\(([^)]+\.js):(\d+):(\d+)\)$/;function Co(e,t){e&&"string"==typeof e.stack&&(e.stack=e.stack.split("\n").map(function(e){return function(e,t){var r=e.match(ko),n=r&&t[r[1]];if(null!=r&&n){var i=n.originalPositionFor({line:Number(r[2]),column:Number(r[3])});if(null!=i.source){var o=i.source,a=i.line,s=i.column,c="("+o.replace(/^webpack:\/\/\//,"")+":"+String(a)+":"+String(s)+")";return e.replace(ko,c)}return e}return e}(e,t)}).join("\n"))}var To=require("fs"),Fo=require("path"),jo=require("stream").PassThrough,Po="Invalid server-rendering bundle format. Should be a string or a bundle Object of type:\n\n{\n  entry: string;\n  files: { [filename: string]: string; };\n  maps: { [filename: string]: string; };\n}\n";function Eo(e){return void 0===e&&(e={}),function(e){void 0===e&&(e={});var t=e.modules;void 0===t&&(t=[]);var r=e.directives;void 0===r&&(r={});var n=e.isUnaryTag;void 0===n&&(n=function(){return!1});var i=e.template,o=e.inject,a=e.cache,s=e.shouldPreload,c=e.shouldPrefetch,u=e.clientManifest,l=e.serializer,f=ao(t,r,n,a),p=new mo({template:i,inject:o,shouldPreload:s,shouldPrefetch:c,clientManifest:u,serializer:l});return{renderToString:function(e,t,r){var n,o;"function"==typeof t&&(r=t,t={}),t&&p.bindRenderFns(t),r||(o=(n=co()).promise,r=n.cb);var a="",s=bt(function(e){return a+=e,!1},r);try{f(e,s,t,function(e){if(e)return r(e);if(t&&t.rendered&&t.rendered(t),i)try{var n=p.render(a,t);"string"!=typeof n?n.then(function(e){return r(null,e)}).catch(r):r(null,n)}catch(e){r(e)}else r(null,a)})}catch(e){r(e)}return o},renderToStream:function(e,t){t&&p.bindRenderFns(t);var r=new _t(function(r,n){f(e,r,t,n)});if(i){if("function"==typeof i)throw new Error("function template is only supported in renderToString.");var n=p.createStream(t);if(r.on("error",function(e){n.emit("error",e)}),r.pipe(n),t&&t.rendered){var o=t.rendered;r.once("beforeEnd",function(){o(t)})}return n}if(t&&t.rendered){var a=t.rendered;r.once("beforeEnd",function(){a(t)})}return r}}}(A(A({},e),{isUnaryTag:dt,canBeLeftOpenTag:vt,modules:ut,directives:A(pt,e.directives)}))}process.env.VUE_ENV="server";var No=function(e){return function(t,r){var n,i,o;void 0===r&&(r={});var a=r.basedir;if("string"==typeof t&&/\.js(on)?$/.test(t)&&Fo.isAbsolute(t)){if(!To.existsSync(t))throw new Error("Cannot locate bundle file: "+t);var s=/\.json$/.test(t);if(a=a||Fo.dirname(t),t=To.readFileSync(t,"utf-8"),s)try{t=JSON.parse(t)}catch(e){throw new Error("Invalid JSON bundle file: "+t)}}if("object"==typeof t){if(i=t.entry,n=t.files,a=a||t.basedir,o=function(e){var t={};return Object.keys(e).forEach(function(r){t[r]=new Oo(e[r])}),t}(t.maps),"string"!=typeof i||"object"!=typeof n)throw new Error(Po)}else{if("string"!=typeof t)throw new Error(Po);i="__vue_ssr_bundle__",n={__vue_ssr_bundle__:t},o={}}var c=e(r),u=Ao(i,n,a,r.runInNewContext);return{renderToString:function(e,t){var r,n;return"function"==typeof e&&(t=e,e={}),t||(n=(r=co()).promise,t=r.cb),u(e).catch(function(e){Co(e,o),t(e)}).then(function(r){r&&c.renderToString(r,e,function(e,r){Co(e,o),t(e,r)})}),n},renderToStream:function(e){var t=new jo;return u(e).catch(function(e){Co(e,o),process.nextTick(function(){t.emit("error",e)})}).then(function(n){if(n){var i=c.renderToStream(n,e);i.on("error",function(e){Co(e,o),t.emit("error",e)}),r&&r.template&&(i.on("beforeStart",function(){t.emit("beforeStart")}),i.on("beforeEnd",function(){t.emit("beforeEnd")})),i.pipe(t)}}),t}}}}(Eo);exports.createRenderer=Eo,exports.createBundleRenderer=No;
\ No newline at end of file
diff --git a/packages/vue-server-renderer/client-plugin.js b/packages/vue-server-renderer/client-plugin.js
index 9916bcfb5f0..bec780fae29 100644
--- a/packages/vue-server-renderer/client-plugin.js
+++ b/packages/vue-server-renderer/client-plugin.js
@@ -4,16 +4,60 @@
 
 var isJS = function (file) { return /\.js(\?[^.]+)?$/.test(file); };
 
+var isCSS = function (file) { return /\.css(\?[^.]+)?$/.test(file); };
+
 var ref = require('chalk');
 var red = ref.red;
 var yellow = ref.yellow;
+var webpack = require('webpack');
 
 var prefix = "[vue-server-renderer-webpack-plugin]";
 var warn = exports.warn = function (msg) { return console.error(red((prefix + " " + msg + "\n"))); };
 var tip = exports.tip = function (msg) { return console.log(yellow((prefix + " " + msg + "\n"))); };
 
+var isWebpack5 = !!(webpack.version && webpack.version[0] > 4);
+
+var onEmit = function (compiler, name, stageName, hook) {
+  if (isWebpack5) {
+    // Webpack >= 5.0.0
+    compiler.hooks.compilation.tap(name, function (compilation) {
+      if (compilation.compiler !== compiler) {
+        // Ignore child compilers
+        return
+      }
+      var stage = webpack.Compilation[stageName];
+      compilation.hooks.processAssets.tapAsync({ name: name, stage: stage }, function (assets, cb) {
+        hook(compilation, cb);
+      });
+    });
+  } else if (compiler.hooks) {
+    // Webpack >= 4.0.0
+    compiler.hooks.emit.tapAsync(name, hook);
+  } else {
+    // Webpack < 4.0.0
+    compiler.plugin('emit', hook);
+  }
+};
+
+var stripModuleIdHash = function (id) {
+  if (isWebpack5) {
+    // Webpack >= 5.0.0
+    return id.replace(/\|\w+$/, '')
+  }
+  // Webpack < 5.0.0
+  return id.replace(/\s\w+$/, '')
+};
+
+var getAssetName = function (asset) {
+  if (typeof asset === 'string') {
+    return asset
+  }
+  return asset.name
+};
+
 var hash = require('hash-sum');
 var uniq = require('lodash.uniq');
+
 var VueSSRClientPlugin = function VueSSRClientPlugin (options) {
   if ( options === void 0 ) options = {};
 
@@ -25,7 +69,8 @@ var VueSSRClientPlugin = function VueSSRClientPlugin (options) {
 VueSSRClientPlugin.prototype.apply = function apply (compiler) {
     var this$1 = this;
 
-  compiler.plugin('emit', function (compilation, cb) {
+  var stage = 'PROCESS_ASSETS_STAGE_ADDITIONAL';
+  onEmit(compiler, 'vue-client-plugin', stage, function (compilation, cb) {
     var stats = compilation.getStats().toJson();
 
     var allFiles = uniq(stats.assets
@@ -34,10 +79,11 @@ VueSSRClientPlugin.prototype.apply = function apply (compiler) {
     var initialFiles = uniq(Object.keys(stats.entrypoints)
       .map(function (name) { return stats.entrypoints[name].assets; })
       .reduce(function (assets, all) { return all.concat(assets); }, [])
-      .filter(isJS));
+      .map(getAssetName)
+      .filter(function (file) { return isJS(file) || isCSS(file); }));
 
     var asyncFiles = allFiles
-      .filter(isJS)
+      .filter(function (file) { return isJS(file) || isCSS(file); })
       .filter(function (file) { return initialFiles.indexOf(file) < 0; });
 
     var manifest = {
@@ -49,7 +95,7 @@ VueSSRClientPlugin.prototype.apply = function apply (compiler) {
     };
 
     var assetModules = stats.modules.filter(function (m) { return m.assets.length; });
-    var fileToIndex = function (file) { return manifest.all.indexOf(file); };
+    var fileToIndex = function (asset) { return manifest.all.indexOf(getAssetName(asset)); };
     stats.modules.forEach(function (m) {
       // ignore modules duplicated in multiple chunks
       if (m.chunks.length === 1) {
@@ -58,7 +104,8 @@ VueSSRClientPlugin.prototype.apply = function apply (compiler) {
         if (!chunk || !chunk.files) {
           return
         }
-        var files = manifest.modules[hash(m.identifier)] = chunk.files.map(fileToIndex);
+        var id = stripModuleIdHash(m.identifier);
+        var files = manifest.modules[hash(id)] = chunk.files.map(fileToIndex);
         // find all asset modules associated with the same chunk
         assetModules.forEach(function (m) {
           if (m.chunks.some(function (id) { return id === cid; })) {
@@ -68,12 +115,6 @@ VueSSRClientPlugin.prototype.apply = function apply (compiler) {
       }
     });
 
-    // const debug = (file, obj) => {
-    // require('fs').writeFileSync(__dirname + '/' + file, JSON.stringify(obj, null, 2))
-    // }
-    // debug('stats.json', stats)
-    // debug('client-manifest.json', manifest)
-
     var json = JSON.stringify(manifest, null, 2);
     compilation.assets[this$1.options.filename] = {
       source: function () { return json; },
diff --git a/packages/vue-server-renderer/index.js b/packages/vue-server-renderer/index.js
index 4a8ddd87f5f..b42ea8fa1f6 100644
--- a/packages/vue-server-renderer/index.js
+++ b/packages/vue-server-renderer/index.js
@@ -13,4 +13,8 @@ if (vueVersion && vueVersion !== packageVersion) {
   )
 }
 
-module.exports = require('./build')
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./build.prod.js')
+} else {
+  module.exports = require('./build.dev.js')
+}
diff --git a/packages/vue-server-renderer/package.json b/packages/vue-server-renderer/package.json
index d92e9d0d9f1..307ebb69cd5 100644
--- a/packages/vue-server-renderer/package.json
+++ b/packages/vue-server-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-server-renderer",
-  "version": "2.5.13",
+  "version": "2.6.14",
   "description": "server renderer for Vue 2.0",
   "main": "index.js",
   "types": "types/index.d.ts",
@@ -22,10 +22,10 @@
     "chalk": "^1.1.3",
     "hash-sum": "^1.0.2",
     "he": "^1.1.0",
-    "lodash.template": "^4.4.0",
+    "lodash.template": "^4.5.0",
     "lodash.uniq": "^4.5.0",
     "resolve": "^1.2.0",
-    "serialize-javascript": "^1.3.0",
+    "serialize-javascript": "^3.1.0",
     "source-map": "0.5.6"
   },
   "devDependencies": {
diff --git a/packages/vue-server-renderer/server-plugin.js b/packages/vue-server-renderer/server-plugin.js
index f494c888aa8..231bcf967ad 100644
--- a/packages/vue-server-renderer/server-plugin.js
+++ b/packages/vue-server-renderer/server-plugin.js
@@ -7,18 +7,29 @@ var isJS = function (file) { return /\.js(\?[^.]+)?$/.test(file); };
 var ref = require('chalk');
 var red = ref.red;
 var yellow = ref.yellow;
+var webpack = require('webpack');
 
 var prefix = "[vue-server-renderer-webpack-plugin]";
 var warn = exports.warn = function (msg) { return console.error(red((prefix + " " + msg + "\n"))); };
 var tip = exports.tip = function (msg) { return console.log(yellow((prefix + " " + msg + "\n"))); };
 
+var isWebpack5 = !!(webpack.version && webpack.version[0] > 4);
+
 var validate = function (compiler) {
   if (compiler.options.target !== 'node') {
     warn('webpack config `target` should be "node".');
   }
 
-  if (compiler.options.output && compiler.options.output.libraryTarget !== 'commonjs2') {
-    warn('webpack config `output.libraryTarget` should be "commonjs2".');
+  if (compiler.options.output) {
+    if (compiler.options.output.library) {
+      // Webpack >= 5.0.0
+      if (compiler.options.output.library.type !== 'commonjs2') {
+        warn('webpack config `output.library.type` should be "commonjs2".');
+      }
+    } else if (compiler.options.output.libraryTarget !== 'commonjs2') {
+      // Webpack < 5.0.0
+      warn('webpack config `output.libraryTarget` should be "commonjs2".');
+    }
   }
 
   if (!compiler.options.externals) {
@@ -29,6 +40,35 @@ var validate = function (compiler) {
   }
 };
 
+var onEmit = function (compiler, name, stageName, hook) {
+  if (isWebpack5) {
+    // Webpack >= 5.0.0
+    compiler.hooks.compilation.tap(name, function (compilation) {
+      if (compilation.compiler !== compiler) {
+        // Ignore child compilers
+        return
+      }
+      var stage = webpack.Compilation[stageName];
+      compilation.hooks.processAssets.tapAsync({ name: name, stage: stage }, function (assets, cb) {
+        hook(compilation, cb);
+      });
+    });
+  } else if (compiler.hooks) {
+    // Webpack >= 4.0.0
+    compiler.hooks.emit.tapAsync(name, hook);
+  } else {
+    // Webpack < 4.0.0
+    compiler.plugin('emit', hook);
+  }
+};
+
+var getAssetName = function (asset) {
+  if (typeof asset === 'string') {
+    return asset
+  }
+  return asset.name
+};
+
 var VueSSRServerPlugin = function VueSSRServerPlugin (options) {
   if ( options === void 0 ) options = {};
 
@@ -42,7 +82,8 @@ VueSSRServerPlugin.prototype.apply = function apply (compiler) {
 
   validate(compiler);
 
-  compiler.plugin('emit', function (compilation, cb) {
+  var stage = 'PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER';
+  onEmit(compiler, 'vue-server-plugin', stage, function (compilation, cb) {
     var stats = compilation.getStats().toJson();
     var entryName = Object.keys(stats.entrypoints)[0];
     var entryInfo = stats.entrypoints[entryName];
@@ -52,7 +93,9 @@ VueSSRServerPlugin.prototype.apply = function apply (compiler) {
       return cb()
     }
 
-    var entryAssets = entryInfo.assets.filter(isJS);
+    var entryAssets = entryInfo.assets
+      .map(getAssetName)
+      .filter(isJS);
 
     if (entryAssets.length > 1) {
       throw new Error(
@@ -74,14 +117,14 @@ VueSSRServerPlugin.prototype.apply = function apply (compiler) {
       maps: {}
     };
 
-    stats.assets.forEach(function (asset) {
-      if (asset.name.match(/\.js$/)) {
-        bundle.files[asset.name] = compilation.assets[asset.name].source();
-      } else if (asset.name.match(/\.js\.map$/)) {
-        bundle.maps[asset.name.replace(/\.map$/, '')] = JSON.parse(compilation.assets[asset.name].source());
+    Object.keys(compilation.assets).forEach(function (name) {
+      if (isJS(name)) {
+        bundle.files[name] = compilation.assets[name].source();
+      } else if (name.match(/\.js\.map$/)) {
+        bundle.maps[name.replace(/\.map$/, '')] = JSON.parse(compilation.assets[name].source());
       }
       // do not emit anything else for server
-      delete compilation.assets[asset.name];
+      delete compilation.assets[name];
     });
 
     var json = JSON.stringify(bundle, null, 2);
diff --git a/packages/vue-server-renderer/types/index.d.ts b/packages/vue-server-renderer/types/index.d.ts
index 1c7e8bdd42c..e1ab698940b 100644
--- a/packages/vue-server-renderer/types/index.d.ts
+++ b/packages/vue-server-renderer/types/index.d.ts
@@ -38,6 +38,7 @@ interface RendererOptions {
 
 interface BundleRendererOptions extends RendererOptions {
   clientManifest?: object;
+  serializer?: (state: object) => string;
   runInNewContext?: boolean | 'once';
   basedir?: string;
 }
diff --git a/packages/vue-template-compiler/README.md b/packages/vue-template-compiler/README.md
index 41d9b58b858..fa0a64bb78e 100644
--- a/packages/vue-template-compiler/README.md
+++ b/packages/vue-template-compiler/README.md
@@ -2,7 +2,7 @@
 
 > This package is auto-generated. For pull requests please see [src/platforms/web/entry-compiler.js](https://github.com/vuejs/vue/tree/dev/src/platforms/web/entry-compiler.js).
 
-This package can be used to pre-compile Vue 2.0 templates into render functions to avoid runtime-compilation overhead and CSP restrictions. You will only need it if you are writing build tools with very specific needs. In most cases you should be using [`vue-loader`](https://github.com/vuejs/vue-loader) or [`vueify`](https://github.com/vuejs/vueify) instead, both of which use this package internally.
+This package can be used to pre-compile Vue 2.0 templates into render functions to avoid runtime-compilation overhead and CSP restrictions. In most cases you should be using it with [`vue-loader`](https://github.com/vuejs/vue-loader), you will only need it separately if you are writing build tools with very specific needs.
 
 ## Installation
 
@@ -33,13 +33,55 @@ Note the returned function code uses `with` and thus cannot be used in strict mo
 
 #### Options
 
-It's possible to hook into the compilation process to support custom template features. **However, beware that by injecting custom compile-time modules, your templates will not work with other build tools built on standard built-in modules, e.g `vue-loader` and `vueify`.**
+- `outputSourceRange` *new in 2.6*
+  - Type: `boolean`
+  - Default: `false`
 
-The optional `options` object can contain the following:
+  Set this to true will cause the `errors` returned in the compiled result become objects in the form of `{ msg, start, end }`. The `start` and `end` properties are numbers that mark the code range of the error source in the template. This can be passed on to the `compiler.generateCodeFrame` API to generate a code frame for the error.
+
+- `whitespace`
+  - Type: `string`
+  - Valid values: `'preserve' | 'condense'`
+  - Default: `'preserve'`
+
+  The default value `'preserve'` handles whitespaces as follows:
+
+  - A whitespace-only text node between element tags is condensed into a single space.
+  - All other whitespaces are preserved as-is.
+
+  If set to `'condense'`:
+
+  - A whitespace-only text node between element tags is removed if it contains new lines. Otherwise, it is condensed into a single space.
+  - Consecutive whitespaces inside a non-whitespace-only text node are condensed into a single space.
+
+  Using condense mode will result in smaller compiled code size and slightly improved performance. However, it will produce minor visual layout differences compared to plain HTML in certain cases.
+
+  **This option does not affect the `<pre>` tag.**
+
+  Example:
+
+  ``` html
+  <!-- source -->
+  <div>
+    <span>
+      foo
+    </span>   <span>bar</span>
+  </div>
+
+  <!-- whitespace: 'preserve' -->
+  <div> <span>
+    foo
+    </span> <span>bar</span> </div>
+
+  <!-- whitespace: 'condense' -->
+  <div><span> foo </span> <span>bar</span></div>
+  ```
 
 - `modules`
 
-  An array of compiler modules. For details on compiler modules, refer to the `ModuleOptions` type in [flow declarations](https://github.com/vuejs/vue/blob/dev/flow/compiler.js#L38-L45) and the [built-in modules](https://github.com/vuejs/vue/tree/dev/src/platforms/web/compiler/modules).
+  It's possible to hook into the compilation process to support custom template features. **However, beware that by injecting custom compile-time modules, your templates will not work with other build tools built on standard built-in modules, e.g `vue-loader` and `vueify`.**
+
+  An array of compiler modules. For details on compiler modules, refer to the `ModuleOptions` type in [flow declarations](https://github.com/vuejs/vue/blob/dev/flow/compiler.js#L47-L59) and the [built-in modules](https://github.com/vuejs/vue/tree/dev/src/platforms/web/compiler/modules).
 
 - `directives`
 
@@ -59,9 +101,11 @@ The optional `options` object can contain the following:
 
   Refer to the implementation of some [built-in compile-time directives](https://github.com/vuejs/vue/tree/dev/src/platforms/web/compiler/directives).
 
-- `preserveWhitespace`
+- `preserveWhitespace` **Deprecated since 2.6**
+  - Type: `boolean`
+  - Default: `true`
 
-  Defaults to `true`. This means the compiled render function preserves all whitespace characters between HTML tags. If set to `false`, whitespace between tags will be ignored. This can result in slightly better performance but may affect layout for inline elements.
+  By default, the compiled render function preserves all whitespace characters between HTML tags. If set to `false`, whitespace between tags will be ignored. This can result in slightly better performance but may affect layout for inline elements.
 
 ---
 
@@ -102,6 +146,12 @@ Same as `compiler.compileToFunction` but generates SSR-specific render function
 
 Parse a SFC (single-file component, or `*.vue` file) into a descriptor (refer to the `SFCDescriptor` type in [flow declarations](https://github.com/vuejs/vue/blob/dev/flow/compiler.js)). This is used in SFC build tools like `vue-loader` and `vueify`.
 
+---
+
+### compiler.generateCodeFrame(template, start, end)
+
+Generate a code frame that highlights the part in `template` defined by `start` and `end`. Useful for error reporting in higher-level tooling.
+
 #### Options
 
 #### `pad`
diff --git a/packages/vue-template-compiler/browser.js b/packages/vue-template-compiler/browser.js
index 9c7d2679c0a..6ffad539827 100644
--- a/packages/vue-template-compiler/browser.js
+++ b/packages/vue-template-compiler/browser.js
@@ -1,5151 +1,5769 @@
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-	typeof define === 'function' && define.amd ? define(['exports'], factory) :
-	(factory((global.VueTemplateCompiler = {})));
-}(this, (function (exports) { 'use strict';
-
-var splitRE$1 = /\r?\n/g;
-var emptyRE = /^\s*$/;
-var needFixRE = /^(\r?\n)*[\t\s]/;
-
-var deIndent = function deindent (str) {
-  if (!needFixRE.test(str)) {
-    return str
-  }
-  var lines = str.split(splitRE$1);
-  var min = Infinity;
-  var type, cur, c;
-  for (var i = 0; i < lines.length; i++) {
-    var line = lines[i];
-    if (!emptyRE.test(line)) {
-      if (!type) {
-        c = line.charAt(0);
-        if (c === ' ' || c === '\t') {
-          type = c;
+  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+  typeof define === 'function' && define.amd ? define(['exports'], factory) :
+  (global = global || self, factory(global.VueTemplateCompiler = {}));
+}(this, function (exports) { 'use strict';
+
+  var splitRE = /\r?\n/g;
+  var emptyRE = /^\s*$/;
+  var needFixRE = /^(\r?\n)*[\t\s]/;
+
+  var deIndent = function deindent (str) {
+    if (!needFixRE.test(str)) {
+      return str
+    }
+    var lines = str.split(splitRE);
+    var min = Infinity;
+    var type, cur, c;
+    for (var i = 0; i < lines.length; i++) {
+      var line = lines[i];
+      if (!emptyRE.test(line)) {
+        if (!type) {
+          c = line.charAt(0);
+          if (c === ' ' || c === '\t') {
+            type = c;
+            cur = count(line, type);
+            if (cur < min) {
+              min = cur;
+            }
+          } else {
+            return str
+          }
+        } else {
           cur = count(line, type);
           if (cur < min) {
             min = cur;
           }
-        } else {
-          return str
-        }
-      } else {
-        cur = count(line, type);
-        if (cur < min) {
-          min = cur;
         }
       }
     }
+    return lines.map(function (line) {
+      return line.slice(min)
+    }).join('\n')
+  };
+
+  function count (line, type) {
+    var i = 0;
+    while (line.charAt(i) === type) {
+      i++;
+    }
+    return i
+  }
+
+  /*  */
+
+  var emptyObject = Object.freeze({});
+
+  // These helpers produce better VM code in JS engines due to their
+  // explicitness and function inlining.
+  function isUndef (v) {
+    return v === undefined || v === null
+  }
+
+  /**
+   * Check if value is primitive.
+   */
+  function isPrimitive (value) {
+    return (
+      typeof value === 'string' ||
+      typeof value === 'number' ||
+      // $flow-disable-line
+      typeof value === 'symbol' ||
+      typeof value === 'boolean'
+    )
   }
-  return lines.map(function (line) {
-    return line.slice(min)
-  }).join('\n')
-};
 
-function count (line, type) {
-  var i = 0;
-  while (line.charAt(i) === type) {
-    i++;
+  /**
+   * Quick object check - this is primarily used to tell
+   * Objects from primitive values when we know the value
+   * is a JSON-compliant type.
+   */
+  function isObject (obj) {
+    return obj !== null && typeof obj === 'object'
   }
-  return i
-}
 
-/*  */
+  /**
+   * Get the raw type string of a value, e.g., [object Object].
+   */
+  var _toString = Object.prototype.toString;
 
-var emptyObject = Object.freeze({});
+  function toRawType (value) {
+    return _toString.call(value).slice(8, -1)
+  }
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+  /**
+   * Strict object type check. Only returns true
+   * for plain JavaScript objects.
+   */
+  function isPlainObject (obj) {
+    return _toString.call(obj) === '[object Object]'
+  }
 
+  /**
+   * Check if val is a valid array index.
+   */
+  function isValidArrayIndex (val) {
+    var n = parseFloat(String(val));
+    return n >= 0 && Math.floor(n) === n && isFinite(val)
+  }
 
+  /**
+   * Make a map and return a function for checking if a key
+   * is in that map.
+   */
+  function makeMap (
+    str,
+    expectsLowerCase
+  ) {
+    var map = Object.create(null);
+    var list = str.split(',');
+    for (var i = 0; i < list.length; i++) {
+      map[list[i]] = true;
+    }
+    return expectsLowerCase
+      ? function (val) { return map[val.toLowerCase()]; }
+      : function (val) { return map[val]; }
+  }
 
+  /**
+   * Check if a tag is a built-in tag.
+   */
+  var isBuiltInTag = makeMap('slot,component', true);
 
+  /**
+   * Check if an attribute is a reserved attribute.
+   */
+  var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
+  /**
+   * Remove an item from an array.
+   */
+  function remove (arr, item) {
+    if (arr.length) {
+      var index = arr.indexOf(item);
+      if (index > -1) {
+        return arr.splice(index, 1)
+      }
+    }
+  }
 
+  /**
+   * Check whether an object has the property.
+   */
+  var hasOwnProperty = Object.prototype.hasOwnProperty;
+  function hasOwn (obj, key) {
+    return hasOwnProperty.call(obj, key)
+  }
 
+  /**
+   * Create a cached version of a pure function.
+   */
+  function cached (fn) {
+    var cache = Object.create(null);
+    return (function cachedFn (str) {
+      var hit = cache[str];
+      return hit || (cache[str] = fn(str))
+    })
+  }
 
-/**
- * Check if value is primitive
- */
+  /**
+   * Camelize a hyphen-delimited string.
+   */
+  var camelizeRE = /-(\w)/g;
+  var camelize = cached(function (str) {
+    return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
+  });
 
+  /**
+   * Hyphenate a camelCase string.
+   */
+  var hyphenateRE = /\B([A-Z])/g;
+  var hyphenate = cached(function (str) {
+    return str.replace(hyphenateRE, '-$1').toLowerCase()
+  });
 
-/**
- * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
- * is a JSON-compliant type.
- */
-function isObject (obj) {
-  return obj !== null && typeof obj === 'object'
-}
+  /**
+   * Simple bind polyfill for environments that do not support it,
+   * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+   * since native bind is now performant enough in most browsers.
+   * But removing it would mean breaking code that was able to run in
+   * PhantomJS 1.x, so this must be kept for backward compatibility.
+   */
 
-/**
- * Get the raw type string of a value e.g. [object Object]
- */
-var _toString = Object.prototype.toString;
+  /* istanbul ignore next */
+  function polyfillBind (fn, ctx) {
+    function boundFn (a) {
+      var l = arguments.length;
+      return l
+        ? l > 1
+          ? fn.apply(ctx, arguments)
+          : fn.call(ctx, a)
+        : fn.call(ctx)
+    }
 
-function toRawType (value) {
-  return _toString.call(value).slice(8, -1)
-}
+    boundFn._length = fn.length;
+    return boundFn
+  }
 
-/**
- * Strict object type check. Only returns true
- * for plain JavaScript objects.
- */
-function isPlainObject (obj) {
-  return _toString.call(obj) === '[object Object]'
-}
+  function nativeBind (fn, ctx) {
+    return fn.bind(ctx)
+  }
 
+  var bind = Function.prototype.bind
+    ? nativeBind
+    : polyfillBind;
 
+  /**
+   * Mix properties into target object.
+   */
+  function extend (to, _from) {
+    for (var key in _from) {
+      to[key] = _from[key];
+    }
+    return to
+  }
 
-/**
- * Check if val is a valid array index.
- */
-function isValidArrayIndex (val) {
-  var n = parseFloat(String(val));
-  return n >= 0 && Math.floor(n) === n && isFinite(val)
-}
+  /* eslint-disable no-unused-vars */
 
-/**
- * Convert a value to a string that is actually rendered.
- */
+  /**
+   * Perform no operation.
+   * Stubbing args to make Flow happy without leaving useless transpiled code
+   * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
+   */
+  function noop (a, b, c) {}
 
+  /**
+   * Always return false.
+   */
+  var no = function (a, b, c) { return false; };
 
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
+  /* eslint-enable no-unused-vars */
 
+  /**
+   * Return the same value.
+   */
+  var identity = function (_) { return _; };
 
-/**
- * Make a map and return a function for checking if a key
- * is in that map.
- */
-function makeMap (
-  str,
-  expectsLowerCase
-) {
-  var map = Object.create(null);
-  var list = str.split(',');
-  for (var i = 0; i < list.length; i++) {
-    map[list[i]] = true;
+  /**
+   * Generate a string containing static keys from compiler modules.
+   */
+  function genStaticKeys (modules) {
+    return modules.reduce(function (keys, m) {
+      return keys.concat(m.staticKeys || [])
+    }, []).join(',')
   }
-  return expectsLowerCase
-    ? function (val) { return map[val.toLowerCase()]; }
-    : function (val) { return map[val]; }
-}
 
-/**
- * Check if a tag is a built-in tag.
- */
-var isBuiltInTag = makeMap('slot,component', true);
+  /*  */
 
-/**
- * Check if a attribute is a reserved attribute.
- */
-var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
+  var isUnaryTag = makeMap(
+    'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
+    'link,meta,param,source,track,wbr'
+  );
 
-/**
- * Remove an item from an array
- */
-function remove (arr, item) {
-  if (arr.length) {
-    var index = arr.indexOf(item);
-    if (index > -1) {
-      return arr.splice(index, 1)
-    }
+  // Elements that you can, intentionally, leave open
+  // (and which close themselves)
+  var canBeLeftOpenTag = makeMap(
+    'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
+  );
+
+  // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
+  // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
+  var isNonPhrasingTag = makeMap(
+    'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
+    'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
+    'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
+    'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
+    'title,tr,track'
+  );
+
+  /*  */
+
+  /**
+   * unicode letters used for parsing html tags, component names and property paths.
+   * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+   * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+   */
+  var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+  /**
+   * Define a property.
+   */
+  function def (obj, key, val, enumerable) {
+    Object.defineProperty(obj, key, {
+      value: val,
+      enumerable: !!enumerable,
+      writable: true,
+      configurable: true
+    });
   }
-}
 
-/**
- * Check whether the object has the property.
- */
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-function hasOwn (obj, key) {
-  return hasOwnProperty.call(obj, key)
-}
-
-/**
- * Create a cached version of a pure function.
- */
-function cached (fn) {
-  var cache = Object.create(null);
-  return (function cachedFn (str) {
-    var hit = cache[str];
-    return hit || (cache[str] = fn(str))
-  })
-}
-
-/**
- * Camelize a hyphen-delimited string.
- */
-var camelizeRE = /-(\w)/g;
-var camelize = cached(function (str) {
-  return str.replace(camelizeRE, function (_, c) { return c ? c.toUpperCase() : ''; })
-});
-
-/**
- * Capitalize a string.
- */
-
-
-
-
-/**
- * Simple bind, faster than native
- */
-
-
-/**
- * Convert an Array-like object to a real Array.
- */
-
-
-/**
- * Mix properties into target object.
- */
-function extend (to, _from) {
-  for (var key in _from) {
-    to[key] = _from[key];
-  }
-  return to
-}
-
-/**
- * Merge an Array of Objects into a single Object.
- */
-
-
-/**
- * Perform no operation.
- * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
- */
-function noop (a, b, c) {}
-
-/**
- * Always return false.
- */
-var no = function (a, b, c) { return false; };
-
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
-
-/**
- * Generate a static keys string from compiler modules.
- */
-function genStaticKeys (modules) {
-  return modules.reduce(function (keys, m) {
-    return keys.concat(m.staticKeys || [])
-  }, []).join(',')
-}
-
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-
-
-
-
-/**
- * Ensure a function is called only once.
- */
-
-/*  */
-
-var isUnaryTag = makeMap(
-  'area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' +
-  'link,meta,param,source,track,wbr'
-);
-
-// Elements that you can, intentionally, leave open
-// (and which close themselves)
-var canBeLeftOpenTag = makeMap(
-  'colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'
-);
-
-// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
-// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
-var isNonPhrasingTag = makeMap(
-  'address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' +
-  'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' +
-  'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' +
-  'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' +
-  'title,tr,track'
-);
-
-/**
- * Not type-checking this file because it's mostly vendor code.
- */
-
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
- */
-
-// Regular Expressions for parsing tags and attributes
-var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
-var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
-var startTagOpen = new RegExp(("^<" + qnameCapture));
-var startTagClose = /^\s*(\/?)>/;
-var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
-var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
-var conditionalComment = /^<!\[/;
-
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
-// Special Elements (can contain anything)
-var isPlainTextElement = makeMap('script,style,textarea', true);
-var reCache = {};
-
-var decodingMap = {
-  '&lt;': '<',
-  '&gt;': '>',
-  '&quot;': '"',
-  '&amp;': '&',
-  '&#10;': '\n',
-  '&#9;': '\t'
-};
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
-
-// #5992
-var isIgnoreNewlineTag = makeMap('pre,textarea', true);
-var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
-
-function decodeAttr (value, shouldDecodeNewlines) {
-  var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
-  return value.replace(re, function (match) { return decodingMap[match]; })
-}
-
-function parseHTML (html, options) {
-  var stack = [];
-  var expectHTML = options.expectHTML;
-  var isUnaryTag$$1 = options.isUnaryTag || no;
-  var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
-  var index = 0;
-  var last, lastTag;
-  while (html) {
-    last = html;
-    // Make sure we're not in a plaintext content element like script/style
-    if (!lastTag || !isPlainTextElement(lastTag)) {
-      var textEnd = html.indexOf('<');
-      if (textEnd === 0) {
-        // Comment:
-        if (comment.test(html)) {
-          var commentEnd = html.indexOf('-->');
-
-          if (commentEnd >= 0) {
-            if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+  /**
+   * Not type-checking this file because it's mostly vendor code.
+   */
+
+  // Regular Expressions for parsing tags and attributes
+  var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+  var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
+  var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
+  var startTagOpen = new RegExp(("^<" + qnameCapture));
+  var startTagClose = /^\s*(\/?)>/;
+  var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
+  var doctype = /^<!DOCTYPE [^>]+>/i;
+  // #7298: escape - to avoid being passed as HTML comment when inlined in page
+  var comment = /^<!\--/;
+  var conditionalComment = /^<!\[/;
+
+  // Special Elements (can contain anything)
+  var isPlainTextElement = makeMap('script,style,textarea', true);
+  var reCache = {};
+
+  var decodingMap = {
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&amp;': '&',
+    '&#10;': '\n',
+    '&#9;': '\t',
+    '&#39;': "'"
+  };
+  var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+  var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
+
+  // #5992
+  var isIgnoreNewlineTag = makeMap('pre,textarea', true);
+  var shouldIgnoreFirstNewline = function (tag, html) { return tag && isIgnoreNewlineTag(tag) && html[0] === '\n'; };
+
+  function decodeAttr (value, shouldDecodeNewlines) {
+    var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
+    return value.replace(re, function (match) { return decodingMap[match]; })
+  }
+
+  function parseHTML (html, options) {
+    var stack = [];
+    var expectHTML = options.expectHTML;
+    var isUnaryTag$$1 = options.isUnaryTag || no;
+    var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
+    var index = 0;
+    var last, lastTag;
+    while (html) {
+      last = html;
+      // Make sure we're not in a plaintext content element like script/style
+      if (!lastTag || !isPlainTextElement(lastTag)) {
+        var textEnd = html.indexOf('<');
+        if (textEnd === 0) {
+          // Comment:
+          if (comment.test(html)) {
+            var commentEnd = html.indexOf('-->');
+
+            if (commentEnd >= 0) {
+              if (options.shouldKeepComment) {
+                options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
+              }
+              advance(commentEnd + 3);
+              continue
+            }
+          }
+
+          // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
+          if (conditionalComment.test(html)) {
+            var conditionalEnd = html.indexOf(']>');
+
+            if (conditionalEnd >= 0) {
+              advance(conditionalEnd + 2);
+              continue
             }
-            advance(commentEnd + 3);
+          }
+
+          // Doctype:
+          var doctypeMatch = html.match(doctype);
+          if (doctypeMatch) {
+            advance(doctypeMatch[0].length);
             continue
           }
-        }
 
-        // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
-        if (conditionalComment.test(html)) {
-          var conditionalEnd = html.indexOf(']>');
+          // End tag:
+          var endTagMatch = html.match(endTag);
+          if (endTagMatch) {
+            var curIndex = index;
+            advance(endTagMatch[0].length);
+            parseEndTag(endTagMatch[1], curIndex, index);
+            continue
+          }
 
-          if (conditionalEnd >= 0) {
-            advance(conditionalEnd + 2);
+          // Start tag:
+          var startTagMatch = parseStartTag();
+          if (startTagMatch) {
+            handleStartTag(startTagMatch);
+            if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
+              advance(1);
+            }
             continue
           }
         }
 
-        // Doctype:
-        var doctypeMatch = html.match(doctype);
-        if (doctypeMatch) {
-          advance(doctypeMatch[0].length);
-          continue
+        var text = (void 0), rest = (void 0), next = (void 0);
+        if (textEnd >= 0) {
+          rest = html.slice(textEnd);
+          while (
+            !endTag.test(rest) &&
+            !startTagOpen.test(rest) &&
+            !comment.test(rest) &&
+            !conditionalComment.test(rest)
+          ) {
+            // < in plain text, be forgiving and treat it as text
+            next = rest.indexOf('<', 1);
+            if (next < 0) { break }
+            textEnd += next;
+            rest = html.slice(textEnd);
+          }
+          text = html.substring(0, textEnd);
         }
 
-        // End tag:
-        var endTagMatch = html.match(endTag);
-        if (endTagMatch) {
-          var curIndex = index;
-          advance(endTagMatch[0].length);
-          parseEndTag(endTagMatch[1], curIndex, index);
-          continue
+        if (textEnd < 0) {
+          text = html;
         }
 
-        // Start tag:
-        var startTagMatch = parseStartTag();
-        if (startTagMatch) {
-          handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
-            advance(1);
-          }
-          continue
+        if (text) {
+          advance(text.length);
         }
-      }
 
-      var text = (void 0), rest = (void 0), next = (void 0);
-      if (textEnd >= 0) {
-        rest = html.slice(textEnd);
-        while (
-          !endTag.test(rest) &&
-          !startTagOpen.test(rest) &&
-          !comment.test(rest) &&
-          !conditionalComment.test(rest)
-        ) {
-          // < in plain text, be forgiving and treat it as text
-          next = rest.indexOf('<', 1);
-          if (next < 0) { break }
-          textEnd += next;
-          rest = html.slice(textEnd);
+        if (options.chars && text) {
+          options.chars(text, index - text.length, index);
         }
-        text = html.substring(0, textEnd);
-        advance(textEnd);
-      }
-
-      if (textEnd < 0) {
-        text = html;
-        html = '';
+      } else {
+        var endTagLength = 0;
+        var stackedTag = lastTag.toLowerCase();
+        var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
+        var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
+          endTagLength = endTag.length;
+          if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
+            text = text
+              .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
+              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
+          }
+          if (shouldIgnoreFirstNewline(stackedTag, text)) {
+            text = text.slice(1);
+          }
+          if (options.chars) {
+            options.chars(text);
+          }
+          return ''
+        });
+        index += html.length - rest$1.length;
+        html = rest$1;
+        parseEndTag(stackedTag, index - endTagLength, index);
       }
 
-      if (options.chars && text) {
-        options.chars(text);
-      }
-    } else {
-      var endTagLength = 0;
-      var stackedTag = lastTag.toLowerCase();
-      var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
-      var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
-        endTagLength = endTag.length;
-        if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
-          text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
-            .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
-        }
-        if (shouldIgnoreFirstNewline(stackedTag, text)) {
-          text = text.slice(1);
-        }
-        if (options.chars) {
-          options.chars(text);
+      if (html === last) {
+        options.chars && options.chars(html);
+        if (!stack.length && options.warn) {
+          options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
         }
-        return ''
-      });
-      index += html.length - rest$1.length;
-      html = rest$1;
-      parseEndTag(stackedTag, index - endTagLength, index);
-    }
-
-    if (html === last) {
-      options.chars && options.chars(html);
-      if ("development" !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+        break
       }
-      break
     }
-  }
 
-  // Clean up any remaining tags
-  parseEndTag();
+    // Clean up any remaining tags
+    parseEndTag();
 
-  function advance (n) {
-    index += n;
-    html = html.substring(n);
-  }
+    function advance (n) {
+      index += n;
+      html = html.substring(n);
+    }
 
-  function parseStartTag () {
-    var start = html.match(startTagOpen);
-    if (start) {
-      var match = {
-        tagName: start[1],
-        attrs: [],
-        start: index
-      };
-      advance(start[0].length);
-      var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
-        advance(attr[0].length);
-        match.attrs.push(attr);
-      }
-      if (end) {
-        match.unarySlash = end[1];
-        advance(end[0].length);
-        match.end = index;
-        return match
+    function parseStartTag () {
+      var start = html.match(startTagOpen);
+      if (start) {
+        var match = {
+          tagName: start[1],
+          attrs: [],
+          start: index
+        };
+        advance(start[0].length);
+        var end, attr;
+        while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+          attr.start = index;
+          advance(attr[0].length);
+          attr.end = index;
+          match.attrs.push(attr);
+        }
+        if (end) {
+          match.unarySlash = end[1];
+          advance(end[0].length);
+          match.end = index;
+          return match
+        }
       }
     }
-  }
 
-  function handleStartTag (match) {
-    var tagName = match.tagName;
-    var unarySlash = match.unarySlash;
+    function handleStartTag (match) {
+      var tagName = match.tagName;
+      var unarySlash = match.unarySlash;
 
-    if (expectHTML) {
-      if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
-        parseEndTag(lastTag);
+      if (expectHTML) {
+        if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
+          parseEndTag(lastTag);
+        }
+        if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
+          parseEndTag(tagName);
+        }
       }
-      if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
-        parseEndTag(tagName);
+
+      var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+
+      var l = match.attrs.length;
+      var attrs = new Array(l);
+      for (var i = 0; i < l; i++) {
+        var args = match.attrs[i];
+        var value = args[3] || args[4] || args[5] || '';
+        var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
+          ? options.shouldDecodeNewlinesForHref
+          : options.shouldDecodeNewlines;
+        attrs[i] = {
+          name: args[1],
+          value: decodeAttr(value, shouldDecodeNewlines)
+        };
+        if (options.outputSourceRange) {
+          attrs[i].start = args.start + args[0].match(/^\s*/).length;
+          attrs[i].end = args.end;
+        }
       }
-    }
 
-    var unary = isUnaryTag$$1(tagName) || !!unarySlash;
+      if (!unary) {
+        stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
+        lastTag = tagName;
+      }
 
-    var l = match.attrs.length;
-    var attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
+      if (options.start) {
+        options.start(tagName, attrs, unary, match.start, match.end);
       }
-      var value = args[3] || args[4] || args[5] || '';
-      var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
-        ? options.shouldDecodeNewlinesForHref
-        : options.shouldDecodeNewlines;
-      attrs[i] = {
-        name: args[1],
-        value: decodeAttr(value, shouldDecodeNewlines)
-      };
     }
 
-    if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
-      lastTag = tagName;
-    }
+    function parseEndTag (tagName, start, end) {
+      var pos, lowerCasedTagName;
+      if (start == null) { start = index; }
+      if (end == null) { end = index; }
+
+      // Find the closest opened tag of the same type
+      if (tagName) {
+        lowerCasedTagName = tagName.toLowerCase();
+        for (pos = stack.length - 1; pos >= 0; pos--) {
+          if (stack[pos].lowerCasedTag === lowerCasedTagName) {
+            break
+          }
+        }
+      } else {
+        // If no tag name is provided, clean shop
+        pos = 0;
+      }
+
+      if (pos >= 0) {
+        // Close all the open elements, up the stack
+        for (var i = stack.length - 1; i >= pos; i--) {
+          if (i > pos || !tagName &&
+            options.warn
+          ) {
+            options.warn(
+              ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+              { start: stack[i].start, end: stack[i].end }
+            );
+          }
+          if (options.end) {
+            options.end(stack[i].tag, start, end);
+          }
+        }
 
-    if (options.start) {
-      options.start(tagName, attrs, unary, match.start, match.end);
+        // Remove the open elements from the stack
+        stack.length = pos;
+        lastTag = pos && stack[pos - 1].tag;
+      } else if (lowerCasedTagName === 'br') {
+        if (options.start) {
+          options.start(tagName, [], true, start, end);
+        }
+      } else if (lowerCasedTagName === 'p') {
+        if (options.start) {
+          options.start(tagName, [], false, start, end);
+        }
+        if (options.end) {
+          options.end(tagName, start, end);
+        }
+      }
     }
   }
 
-  function parseEndTag (tagName, start, end) {
-    var pos, lowerCasedTagName;
-    if (start == null) { start = index; }
-    if (end == null) { end = index; }
+  /*  */
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
+  var splitRE$1 = /\r?\n/g;
+  var replaceRE = /./g;
+  var isSpecialTag = makeMap('script,style,template', true);
+
+  /**
+   * Parse a single-file component (*.vue) file into an SFC Descriptor Object.
+   */
+  function parseComponent (
+    content,
+    options
+  ) {
+    if ( options === void 0 ) options = {};
+
+    var sfc = {
+      template: null,
+      script: null,
+      styles: [],
+      customBlocks: [],
+      errors: []
+    };
+    var depth = 0;
+    var currentBlock = null;
+
+    var warn = function (msg) {
+      sfc.errors.push(msg);
+    };
+
+    if (options.outputSourceRange) {
+      warn = function (msg, range) {
+        var data = { msg: msg };
+        if (range.start != null) {
+          data.start = range.start;
+        }
+        if (range.end != null) {
+          data.end = range.end;
+        }
+        sfc.errors.push(data);
+      };
     }
 
-    // Find the closest opened tag of the same type
-    if (tagName) {
-      for (pos = stack.length - 1; pos >= 0; pos--) {
-        if (stack[pos].lowerCasedTag === lowerCasedTagName) {
-          break
+    function start (
+      tag,
+      attrs,
+      unary,
+      start,
+      end
+    ) {
+      if (depth === 0) {
+        currentBlock = {
+          type: tag,
+          content: '',
+          start: end,
+          attrs: attrs.reduce(function (cumulated, ref) {
+            var name = ref.name;
+            var value = ref.value;
+
+            cumulated[name] = value || true;
+            return cumulated
+          }, {})
+        };
+        if (isSpecialTag(tag)) {
+          checkAttrs(currentBlock, attrs);
+          if (tag === 'style') {
+            sfc.styles.push(currentBlock);
+          } else {
+            sfc[tag] = currentBlock;
+          }
+        } else { // custom blocks
+          sfc.customBlocks.push(currentBlock);
         }
       }
-    } else {
-      // If no tag name is provided, clean shop
-      pos = 0;
+      if (!unary) {
+        depth++;
+      }
     }
 
-    if (pos >= 0) {
-      // Close all the open elements, up the stack
-      for (var i = stack.length - 1; i >= pos; i--) {
-        if ("development" !== 'production' &&
-          (i > pos || !tagName) &&
-          options.warn
-        ) {
-          options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
-          );
+    function checkAttrs (block, attrs) {
+      for (var i = 0; i < attrs.length; i++) {
+        var attr = attrs[i];
+        if (attr.name === 'lang') {
+          block.lang = attr.value;
         }
-        if (options.end) {
-          options.end(stack[i].tag, start, end);
+        if (attr.name === 'scoped') {
+          block.scoped = true;
+        }
+        if (attr.name === 'module') {
+          block.module = attr.value || true;
+        }
+        if (attr.name === 'src') {
+          block.src = attr.value;
         }
       }
+    }
 
-      // Remove the open elements from the stack
-      stack.length = pos;
-      lastTag = pos && stack[pos - 1].tag;
-    } else if (lowerCasedTagName === 'br') {
-      if (options.start) {
-        options.start(tagName, [], true, start, end);
-      }
-    } else if (lowerCasedTagName === 'p') {
-      if (options.start) {
-        options.start(tagName, [], false, start, end);
-      }
-      if (options.end) {
-        options.end(tagName, start, end);
+    function end (tag, start) {
+      if (depth === 1 && currentBlock) {
+        currentBlock.end = start;
+        var text = content.slice(currentBlock.start, currentBlock.end);
+        if (options.deindent !== false) {
+          text = deIndent(text);
+        }
+        // pad content so that linters and pre-processors can output correct
+        // line numbers in errors and warnings
+        if (currentBlock.type !== 'template' && options.pad) {
+          text = padContent(currentBlock, options.pad) + text;
+        }
+        currentBlock.content = text;
+        currentBlock = null;
       }
+      depth--;
     }
-  }
-}
-
-/*  */
 
-var splitRE = /\r?\n/g;
-var replaceRE = /./g;
-var isSpecialTag = makeMap('script,style,template', true);
+    function padContent (block, pad) {
+      if (pad === 'space') {
+        return content.slice(0, block.start).replace(replaceRE, ' ')
+      } else {
+        var offset = content.slice(0, block.start).split(splitRE$1).length;
+        var padChar = block.type === 'script' && !block.lang
+          ? '//\n'
+          : '\n';
+        return Array(offset).join(padChar)
+      }
+    }
 
+    parseHTML(content, {
+      warn: warn,
+      start: start,
+      end: end,
+      outputSourceRange: options.outputSourceRange
+    });
 
+    return sfc
+  }
 
-/**
- * Parse a single-file component (*.vue) file into an SFC Descriptor Object.
- */
-function parseComponent (
-  content,
-  options
-) {
-  if ( options === void 0 ) options = {};
+  /*  */
 
-  var sfc = {
-    template: null,
-    script: null,
-    styles: [],
-    customBlocks: []
-  };
-  var depth = 0;
-  var currentBlock = null;
+  // can we use __proto__?
+  var hasProto = '__proto__' in {};
 
-  function start (
-    tag,
-    attrs,
-    unary,
-    start,
-    end
-  ) {
-    if (depth === 0) {
-      currentBlock = {
-        type: tag,
-        content: '',
-        start: end,
-        attrs: attrs.reduce(function (cumulated, ref) {
-          var name = ref.name;
-          var value = ref.value;
+  // Browser environment sniffing
+  var inBrowser = typeof window !== 'undefined';
+  var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
+  var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
+  var UA = inBrowser && window.navigator.userAgent.toLowerCase();
+  var isIE = UA && /msie|trident/.test(UA);
+  var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
+  var isEdge = UA && UA.indexOf('edge/') > 0;
+  var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
+  var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
+  var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+  var isPhantomJS = UA && /phantomjs/.test(UA);
+  var isFF = UA && UA.match(/firefox\/(\d+)/);
 
-          cumulated[name] = value || true;
-          return cumulated
-        }, {})
-      };
-      if (isSpecialTag(tag)) {
-        checkAttrs(currentBlock, attrs);
-        if (tag === 'style') {
-          sfc.styles.push(currentBlock);
-        } else {
-          sfc[tag] = currentBlock;
+  // Firefox has a "watch" function on Object.prototype...
+  var nativeWatch = ({}).watch;
+  if (inBrowser) {
+    try {
+      var opts = {};
+      Object.defineProperty(opts, 'passive', ({
+        get: function get () {
         }
-      } else { // custom blocks
-        sfc.customBlocks.push(currentBlock);
-      }
-    }
-    if (!unary) {
-      depth++;
-    }
+      })); // https://github.com/facebook/flow/issues/285
+      window.addEventListener('test-passive', null, opts);
+    } catch (e) {}
   }
 
-  function checkAttrs (block, attrs) {
-    for (var i = 0; i < attrs.length; i++) {
-      var attr = attrs[i];
-      if (attr.name === 'lang') {
-        block.lang = attr.value;
-      }
-      if (attr.name === 'scoped') {
-        block.scoped = true;
-      }
-      if (attr.name === 'module') {
-        block.module = attr.value || true;
-      }
-      if (attr.name === 'src') {
-        block.src = attr.value;
+  // this needs to be lazy-evaled because vue may be required before
+  // vue-server-renderer can set VUE_ENV
+  var _isServer;
+  var isServerRendering = function () {
+    if (_isServer === undefined) {
+      /* istanbul ignore if */
+      if (!inBrowser && !inWeex && typeof global !== 'undefined') {
+        // detect presence of vue-server-renderer and avoid
+        // Webpack shimming the process
+        _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
+      } else {
+        _isServer = false;
       }
     }
-  }
+    return _isServer
+  };
 
-  function end (tag, start, end) {
-    if (depth === 1 && currentBlock) {
-      currentBlock.end = start;
-      var text = deIndent(content.slice(currentBlock.start, currentBlock.end));
-      // pad content so that linters and pre-processors can output correct
-      // line numbers in errors and warnings
-      if (currentBlock.type !== 'template' && options.pad) {
-        text = padContent(currentBlock, options.pad) + text;
-      }
-      currentBlock.content = text;
-      currentBlock = null;
-    }
-    depth--;
-  }
+  // detect devtools
+  var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
 
-  function padContent (block, pad) {
-    if (pad === 'space') {
-      return content.slice(0, block.start).replace(replaceRE, ' ')
-    } else {
-      var offset = content.slice(0, block.start).split(splitRE).length;
-      var padChar = block.type === 'script' && !block.lang
-        ? '//\n'
-        : '\n';
-      return Array(offset).join(padChar)
-    }
+  /* istanbul ignore next */
+  function isNative (Ctor) {
+    return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
   }
 
-  parseHTML(content, {
-    start: start,
-    end: end
+  var hasSymbol =
+    typeof Symbol !== 'undefined' && isNative(Symbol) &&
+    typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
+
+  var _Set;
+  /* istanbul ignore if */ // $flow-disable-line
+  if (typeof Set !== 'undefined' && isNative(Set)) {
+    // use native Set when available.
+    _Set = Set;
+  } else {
+    // a non-standard Set polyfill that only works with primitive keys.
+    _Set = /*@__PURE__*/(function () {
+      function Set () {
+        this.set = Object.create(null);
+      }
+      Set.prototype.has = function has (key) {
+        return this.set[key] === true
+      };
+      Set.prototype.add = function add (key) {
+        this.set[key] = true;
+      };
+      Set.prototype.clear = function clear () {
+        this.set = Object.create(null);
+      };
+
+      return Set;
+    }());
+  }
+
+  var ASSET_TYPES = [
+    'component',
+    'directive',
+    'filter'
+  ];
+
+  var LIFECYCLE_HOOKS = [
+    'beforeCreate',
+    'created',
+    'beforeMount',
+    'mounted',
+    'beforeUpdate',
+    'updated',
+    'beforeDestroy',
+    'destroyed',
+    'activated',
+    'deactivated',
+    'errorCaptured',
+    'serverPrefetch'
+  ];
+
+  /*  */
+
+
+
+  var config = ({
+    /**
+     * Option merge strategies (used in core/util/options)
+     */
+    // $flow-disable-line
+    optionMergeStrategies: Object.create(null),
+
+    /**
+     * Whether to suppress warnings.
+     */
+    silent: false,
+
+    /**
+     * Show production mode tip message on boot?
+     */
+    productionTip: "development" !== 'production',
+
+    /**
+     * Whether to enable devtools
+     */
+    devtools: "development" !== 'production',
+
+    /**
+     * Whether to record perf
+     */
+    performance: false,
+
+    /**
+     * Error handler for watcher errors
+     */
+    errorHandler: null,
+
+    /**
+     * Warn handler for watcher warns
+     */
+    warnHandler: null,
+
+    /**
+     * Ignore certain custom elements
+     */
+    ignoredElements: [],
+
+    /**
+     * Custom user key aliases for v-on
+     */
+    // $flow-disable-line
+    keyCodes: Object.create(null),
+
+    /**
+     * Check if a tag is reserved so that it cannot be registered as a
+     * component. This is platform-dependent and may be overwritten.
+     */
+    isReservedTag: no,
+
+    /**
+     * Check if an attribute is reserved so that it cannot be used as a component
+     * prop. This is platform-dependent and may be overwritten.
+     */
+    isReservedAttr: no,
+
+    /**
+     * Check if a tag is an unknown element.
+     * Platform-dependent.
+     */
+    isUnknownElement: no,
+
+    /**
+     * Get the namespace of an element
+     */
+    getTagNamespace: noop,
+
+    /**
+     * Parse the real tag name for the specific platform.
+     */
+    parsePlatformTagName: identity,
+
+    /**
+     * Check if an attribute must be bound using property, e.g. value
+     * Platform-dependent.
+     */
+    mustUseProp: no,
+
+    /**
+     * Perform updates asynchronously. Intended to be used by Vue Test Utils
+     * This will significantly reduce performance if set to false.
+     */
+    async: true,
+
+    /**
+     * Exposed for legacy reasons
+     */
+    _lifecycleHooks: LIFECYCLE_HOOKS
   });
 
-  return sfc
-}
+  /*  */
 
-/*  */
+  var warn = noop;
+  var tip = noop;
+  var generateComponentTrace = (noop); // work around flow check
+  var formatComponentName = (noop);
 
-/**
- * Check if a string starts with $ or _
- */
+  {
+    var hasConsole = typeof console !== 'undefined';
+    var classifyRE = /(?:^|[-_])(\w)/g;
+    var classify = function (str) { return str
+      .replace(classifyRE, function (c) { return c.toUpperCase(); })
+      .replace(/[-_]/g, ''); };
 
+    warn = function (msg, vm) {
+      var trace = vm ? generateComponentTrace(vm) : '';
 
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
-/*  */
-
-
-// can we use __proto__?
-var hasProto = '__proto__' in {};
-
-// Browser environment sniffing
-var inBrowser = typeof window !== 'undefined';
-var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
-var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
-var UA = inBrowser && window.navigator.userAgent.toLowerCase();
-var isIE = UA && /msie|trident/.test(UA);
-var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
-var isEdge = UA && UA.indexOf('edge/') > 0;
-var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
-var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
-var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
-
-// Firefox has a "watch" function on Object.prototype...
-var nativeWatch = ({}).watch;
-
-
-if (inBrowser) {
-  try {
-    var opts = {};
-    Object.defineProperty(opts, 'passive', ({
-      get: function get () {
-        /* istanbul ignore next */
-        
-      }
-    })); // https://github.com/facebook/flow/issues/285
-    window.addEventListener('test-passive', null, opts);
-  } catch (e) {}
-}
-
-// this needs to be lazy-evaled because vue may be required before
-// vue-server-renderer can set VUE_ENV
-var _isServer;
-var isServerRendering = function () {
-  if (_isServer === undefined) {
-    /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
-      // detect presence of vue-server-renderer and avoid
-      // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
-    } else {
-      _isServer = false;
-    }
-  }
-  return _isServer
-};
-
-// detect devtools
-var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
-
-/* istanbul ignore next */
-function isNative (Ctor) {
-  return typeof Ctor === 'function' && /native code/.test(Ctor.toString())
-}
-
-var hasSymbol =
-  typeof Symbol !== 'undefined' && isNative(Symbol) &&
-  typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
-
-/* istanbul ignore if */ // $flow-disable-line
-if (typeof Set !== 'undefined' && isNative(Set)) {
-  // use native Set when available.
-  
-} else {
-  // a non-standard Set polyfill that only works with primitive keys.
-  
-}
-
-var ASSET_TYPES = [
-  'component',
-  'directive',
-  'filter'
-];
-
-var LIFECYCLE_HOOKS = [
-  'beforeCreate',
-  'created',
-  'beforeMount',
-  'mounted',
-  'beforeUpdate',
-  'updated',
-  'beforeDestroy',
-  'destroyed',
-  'activated',
-  'deactivated',
-  'errorCaptured'
-];
-
-/*  */
-
-var config = ({
-  /**
-   * Option merge strategies (used in core/util/options)
-   */
-  // $flow-disable-line
-  optionMergeStrategies: Object.create(null),
+      if (hasConsole && (!config.silent)) {
+        console.error(("[Vue warn]: " + msg + trace));
+      }
+    };
 
-  /**
-   * Whether to suppress warnings.
-   */
-  silent: false,
+    tip = function (msg, vm) {
+      if (hasConsole && (!config.silent)) {
+        console.warn("[Vue tip]: " + msg + (
+          vm ? generateComponentTrace(vm) : ''
+        ));
+      }
+    };
 
-  /**
-   * Show production mode tip message on boot?
-   */
-  productionTip: "development" !== 'production',
+    formatComponentName = function (vm, includeFile) {
+      if (vm.$root === vm) {
+        return '<Root>'
+      }
+      var options = typeof vm === 'function' && vm.cid != null
+        ? vm.options
+        : vm._isVue
+          ? vm.$options || vm.constructor.options
+          : vm;
+      var name = options.name || options._componentTag;
+      var file = options.__file;
+      if (!name && file) {
+        var match = file.match(/([^/\\]+)\.vue$/);
+        name = match && match[1];
+      }
 
-  /**
-   * Whether to enable devtools
-   */
-  devtools: "development" !== 'production',
+      return (
+        (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
+        (file && includeFile !== false ? (" at " + file) : '')
+      )
+    };
+
+    var repeat = function (str, n) {
+      var res = '';
+      while (n) {
+        if (n % 2 === 1) { res += str; }
+        if (n > 1) { str += str; }
+        n >>= 1;
+      }
+      return res
+    };
+
+    generateComponentTrace = function (vm) {
+      if (vm._isVue && vm.$parent) {
+        var tree = [];
+        var currentRecursiveSequence = 0;
+        while (vm) {
+          if (tree.length > 0) {
+            var last = tree[tree.length - 1];
+            if (last.constructor === vm.constructor) {
+              currentRecursiveSequence++;
+              vm = vm.$parent;
+              continue
+            } else if (currentRecursiveSequence > 0) {
+              tree[tree.length - 1] = [last, currentRecursiveSequence];
+              currentRecursiveSequence = 0;
+            }
+          }
+          tree.push(vm);
+          vm = vm.$parent;
+        }
+        return '\n\nfound in\n\n' + tree
+          .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
+              ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
+              : formatComponentName(vm))); })
+          .join('\n')
+      } else {
+        return ("\n\n(found in " + (formatComponentName(vm)) + ")")
+      }
+    };
+  }
 
-  /**
-   * Whether to record perf
-   */
-  performance: false,
+  /*  */
 
-  /**
-   * Error handler for watcher errors
-   */
-  errorHandler: null,
+  var uid = 0;
 
   /**
-   * Warn handler for watcher warns
+   * A dep is an observable that can have multiple
+   * directives subscribing to it.
    */
-  warnHandler: null,
+  var Dep = function Dep () {
+    this.id = uid++;
+    this.subs = [];
+  };
 
-  /**
-   * Ignore certain custom elements
-   */
-  ignoredElements: [],
+  Dep.prototype.addSub = function addSub (sub) {
+    this.subs.push(sub);
+  };
 
-  /**
-   * Custom user key aliases for v-on
+  Dep.prototype.removeSub = function removeSub (sub) {
+    remove(this.subs, sub);
+  };
+
+  Dep.prototype.depend = function depend () {
+    if (Dep.target) {
+      Dep.target.addDep(this);
+    }
+  };
+
+  Dep.prototype.notify = function notify () {
+    // stabilize the subscriber list first
+    var subs = this.subs.slice();
+    for (var i = 0, l = subs.length; i < l; i++) {
+      subs[i].update();
+    }
+  };
+
+  // The current target watcher being evaluated.
+  // This is globally unique because only one watcher
+  // can be evaluated at a time.
+  Dep.target = null;
+
+  /*  */
+
+  var VNode = function VNode (
+    tag,
+    data,
+    children,
+    text,
+    elm,
+    context,
+    componentOptions,
+    asyncFactory
+  ) {
+    this.tag = tag;
+    this.data = data;
+    this.children = children;
+    this.text = text;
+    this.elm = elm;
+    this.ns = undefined;
+    this.context = context;
+    this.fnContext = undefined;
+    this.fnOptions = undefined;
+    this.fnScopeId = undefined;
+    this.key = data && data.key;
+    this.componentOptions = componentOptions;
+    this.componentInstance = undefined;
+    this.parent = undefined;
+    this.raw = false;
+    this.isStatic = false;
+    this.isRootInsert = true;
+    this.isComment = false;
+    this.isCloned = false;
+    this.isOnce = false;
+    this.asyncFactory = asyncFactory;
+    this.asyncMeta = undefined;
+    this.isAsyncPlaceholder = false;
+  };
+
+  var prototypeAccessors = { child: { configurable: true } };
+
+  // DEPRECATED: alias for componentInstance for backwards compat.
+  /* istanbul ignore next */
+  prototypeAccessors.child.get = function () {
+    return this.componentInstance
+  };
+
+  Object.defineProperties( VNode.prototype, prototypeAccessors );
+
+  /*
+   * not type checking this file because flow doesn't play well with
+   * dynamically accessing methods on Array prototype
    */
-  // $flow-disable-line
-  keyCodes: Object.create(null),
+
+  var arrayProto = Array.prototype;
+  var arrayMethods = Object.create(arrayProto);
+
+  var methodsToPatch = [
+    'push',
+    'pop',
+    'shift',
+    'unshift',
+    'splice',
+    'sort',
+    'reverse'
+  ];
 
   /**
-   * Check if a tag is reserved so that it cannot be registered as a
-   * component. This is platform-dependent and may be overwritten.
+   * Intercept mutating methods and emit events
    */
-  isReservedTag: no,
+  methodsToPatch.forEach(function (method) {
+    // cache original method
+    var original = arrayProto[method];
+    def(arrayMethods, method, function mutator () {
+      var args = [], len = arguments.length;
+      while ( len-- ) args[ len ] = arguments[ len ];
+
+      var result = original.apply(this, args);
+      var ob = this.__ob__;
+      var inserted;
+      switch (method) {
+        case 'push':
+        case 'unshift':
+          inserted = args;
+          break
+        case 'splice':
+          inserted = args.slice(2);
+          break
+      }
+      if (inserted) { ob.observeArray(inserted); }
+      // notify change
+      ob.dep.notify();
+      return result
+    });
+  });
+
+  /*  */
+
+  var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
   /**
-   * Check if an attribute is reserved so that it cannot be used as a component
-   * prop. This is platform-dependent and may be overwritten.
+   * In some cases we may want to disable observation inside a component's
+   * update computation.
    */
-  isReservedAttr: no,
+  var shouldObserve = true;
 
   /**
-   * Check if a tag is an unknown element.
-   * Platform-dependent.
+   * Observer class that is attached to each observed
+   * object. Once attached, the observer converts the target
+   * object's property keys into getter/setters that
+   * collect dependencies and dispatch updates.
    */
-  isUnknownElement: no,
+  var Observer = function Observer (value) {
+    this.value = value;
+    this.dep = new Dep();
+    this.vmCount = 0;
+    def(value, '__ob__', this);
+    if (Array.isArray(value)) {
+      if (hasProto) {
+        protoAugment(value, arrayMethods);
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys);
+      }
+      this.observeArray(value);
+    } else {
+      this.walk(value);
+    }
+  };
 
   /**
-   * Get the namespace of an element
+   * Walk through all properties and convert them into
+   * getter/setters. This method should only be called when
+   * value type is Object.
    */
-  getTagNamespace: noop,
+  Observer.prototype.walk = function walk (obj) {
+    var keys = Object.keys(obj);
+    for (var i = 0; i < keys.length; i++) {
+      defineReactive$$1(obj, keys[i]);
+    }
+  };
 
   /**
-   * Parse the real tag name for the specific platform.
+   * Observe a list of Array items.
    */
-  parsePlatformTagName: identity,
+  Observer.prototype.observeArray = function observeArray (items) {
+    for (var i = 0, l = items.length; i < l; i++) {
+      observe(items[i]);
+    }
+  };
+
+  // helpers
 
   /**
-   * Check if an attribute must be bound using property, e.g. value
-   * Platform-dependent.
+   * Augment a target Object or Array by intercepting
+   * the prototype chain using __proto__
    */
-  mustUseProp: no,
+  function protoAugment (target, src) {
+    /* eslint-disable no-proto */
+    target.__proto__ = src;
+    /* eslint-enable no-proto */
+  }
 
   /**
-   * Exposed for legacy reasons
+   * Augment a target Object or Array by defining
+   * hidden properties.
    */
-  _lifecycleHooks: LIFECYCLE_HOOKS
-});
-
-/*  */
-
-var warn = noop;
-var tip = noop;
-var generateComponentTrace = (noop); // work around flow check
-var formatComponentName = (noop);
-
-{
-  var hasConsole = typeof console !== 'undefined';
-  var classifyRE = /(?:^|[-_])(\w)/g;
-  var classify = function (str) { return str
-    .replace(classifyRE, function (c) { return c.toUpperCase(); })
-    .replace(/[-_]/g, ''); };
-
-  warn = function (msg, vm) {
-    var trace = vm ? generateComponentTrace(vm) : '';
-
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
-      console.error(("[Vue warn]: " + msg + trace));
+  /* istanbul ignore next */
+  function copyAugment (target, src, keys) {
+    for (var i = 0, l = keys.length; i < l; i++) {
+      var key = keys[i];
+      def(target, key, src[key]);
     }
-  };
+  }
 
-  tip = function (msg, vm) {
-    if (hasConsole && (!config.silent)) {
-      console.warn("[Vue tip]: " + msg + (
-        vm ? generateComponentTrace(vm) : ''
-      ));
+  /**
+   * Attempt to create an observer instance for a value,
+   * returns the new observer if successfully observed,
+   * or the existing observer if the value already has one.
+   */
+  function observe (value, asRootData) {
+    if (!isObject(value) || value instanceof VNode) {
+      return
     }
-  };
-
-  formatComponentName = function (vm, includeFile) {
-    if (vm.$root === vm) {
-      return '<Root>'
+    var ob;
+    if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
+      ob = value.__ob__;
+    } else if (
+      shouldObserve &&
+      !isServerRendering() &&
+      (Array.isArray(value) || isPlainObject(value)) &&
+      Object.isExtensible(value) &&
+      !value._isVue
+    ) {
+      ob = new Observer(value);
     }
-    var options = typeof vm === 'function' && vm.cid != null
-      ? vm.options
-      : vm._isVue
-        ? vm.$options || vm.constructor.options
-        : vm || {};
-    var name = options.name || options._componentTag;
-    var file = options.__file;
-    if (!name && file) {
-      var match = file.match(/([^/\\]+)\.vue$/);
-      name = match && match[1];
+    if (asRootData && ob) {
+      ob.vmCount++;
     }
+    return ob
+  }
 
-    return (
-      (name ? ("<" + (classify(name)) + ">") : "<Anonymous>") +
-      (file && includeFile !== false ? (" at " + file) : '')
-    )
-  };
+  /**
+   * Define a reactive property on an Object.
+   */
+  function defineReactive$$1 (
+    obj,
+    key,
+    val,
+    customSetter,
+    shallow
+  ) {
+    var dep = new Dep();
 
-  var repeat = function (str, n) {
-    var res = '';
-    while (n) {
-      if (n % 2 === 1) { res += str; }
-      if (n > 1) { str += str; }
-      n >>= 1;
+    var property = Object.getOwnPropertyDescriptor(obj, key);
+    if (property && property.configurable === false) {
+      return
     }
-    return res
-  };
 
-  generateComponentTrace = function (vm) {
-    if (vm._isVue && vm.$parent) {
-      var tree = [];
-      var currentRecursiveSequence = 0;
-      while (vm) {
-        if (tree.length > 0) {
-          var last = tree[tree.length - 1];
-          if (last.constructor === vm.constructor) {
-            currentRecursiveSequence++;
-            vm = vm.$parent;
-            continue
-          } else if (currentRecursiveSequence > 0) {
-            tree[tree.length - 1] = [last, currentRecursiveSequence];
-            currentRecursiveSequence = 0;
-          }
-        }
-        tree.push(vm);
-        vm = vm.$parent;
-      }
-      return '\n\nfound in\n\n' + tree
-        .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm)
-            ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)")
-            : formatComponentName(vm))); })
-        .join('\n')
-    } else {
-      return ("\n\n(found in " + (formatComponentName(vm)) + ")")
-    }
-  };
-}
-
-/*  */
-
-
-var uid = 0;
-
-/**
- * A dep is an observable that can have multiple
- * directives subscribing to it.
- */
-var Dep = function Dep () {
-  this.id = uid++;
-  this.subs = [];
-};
-
-Dep.prototype.addSub = function addSub (sub) {
-  this.subs.push(sub);
-};
-
-Dep.prototype.removeSub = function removeSub (sub) {
-  remove(this.subs, sub);
-};
-
-Dep.prototype.depend = function depend () {
-  if (Dep.target) {
-    Dep.target.addDep(this);
-  }
-};
-
-Dep.prototype.notify = function notify () {
-  // stabilize the subscriber list first
-  var subs = this.subs.slice();
-  for (var i = 0, l = subs.length; i < l; i++) {
-    subs[i].update();
-  }
-};
-
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
-Dep.target = null;
-
-/*  */
-
-var VNode = function VNode (
-  tag,
-  data,
-  children,
-  text,
-  elm,
-  context,
-  componentOptions,
-  asyncFactory
-) {
-  this.tag = tag;
-  this.data = data;
-  this.children = children;
-  this.text = text;
-  this.elm = elm;
-  this.ns = undefined;
-  this.context = context;
-  this.fnContext = undefined;
-  this.fnOptions = undefined;
-  this.fnScopeId = undefined;
-  this.key = data && data.key;
-  this.componentOptions = componentOptions;
-  this.componentInstance = undefined;
-  this.parent = undefined;
-  this.raw = false;
-  this.isStatic = false;
-  this.isRootInsert = true;
-  this.isComment = false;
-  this.isCloned = false;
-  this.isOnce = false;
-  this.asyncFactory = asyncFactory;
-  this.asyncMeta = undefined;
-  this.isAsyncPlaceholder = false;
-};
-
-var prototypeAccessors = { child: { configurable: true } };
-
-// DEPRECATED: alias for componentInstance for backwards compat.
-/* istanbul ignore next */
-prototypeAccessors.child.get = function () {
-  return this.componentInstance
-};
-
-Object.defineProperties( VNode.prototype, prototypeAccessors );
-
-
-
-
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-
-/*
- * not type checking this file because flow doesn't play well with
- * dynamically accessing methods on Array prototype
- */
-
-var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
-  'push',
-  'pop',
-  'shift',
-  'unshift',
-  'splice',
-  'sort',
-  'reverse'
-].forEach(function (method) {
-  // cache original method
-  var original = arrayProto[method];
-  def(arrayMethods, method, function mutator () {
-    var args = [], len = arguments.length;
-    while ( len-- ) args[ len ] = arguments[ len ];
-
-    var result = original.apply(this, args);
-    var ob = this.__ob__;
-    var inserted;
-    switch (method) {
-      case 'push':
-      case 'unshift':
-        inserted = args;
-        break
-      case 'splice':
-        inserted = args.slice(2);
-        break
+    // cater for pre-defined getter/setters
+    var getter = property && property.get;
+    var setter = property && property.set;
+    if ((!getter || setter) && arguments.length === 2) {
+      val = obj[key];
     }
-    if (inserted) { ob.observeArray(inserted); }
-    // notify change
-    ob.dep.notify();
-    return result
-  });
-});
-
-/*  */
-
-var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
-
-/**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
- */
-var observerState = {
-  shouldConvert: true
-};
-
-/**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
- * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
- */
-var Observer = function Observer (value) {
-  this.value = value;
-  this.dep = new Dep();
-  this.vmCount = 0;
-  def(value, '__ob__', this);
-  if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
-    this.observeArray(value);
-  } else {
-    this.walk(value);
-  }
-};
-
-/**
- * Walk through each property and convert them into
- * getter/setters. This method should only be called when
- * value type is Object.
- */
-Observer.prototype.walk = function walk (obj) {
-  var keys = Object.keys(obj);
-  for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
-  }
-};
-
-/**
- * Observe a list of Array items.
- */
-Observer.prototype.observeArray = function observeArray (items) {
-  for (var i = 0, l = items.length; i < l; i++) {
-    observe(items[i]);
-  }
-};
-
-// helpers
-
-/**
- * Augment an target Object or Array by intercepting
- * the prototype chain using __proto__
- */
-function protoAugment (target, src, keys) {
-  /* eslint-disable no-proto */
-  target.__proto__ = src;
-  /* eslint-enable no-proto */
-}
-
-/**
- * Augment an target Object or Array by defining
- * hidden properties.
- */
-/* istanbul ignore next */
-function copyAugment (target, src, keys) {
-  for (var i = 0, l = keys.length; i < l; i++) {
-    var key = keys[i];
-    def(target, key, src[key]);
-  }
-}
-
-/**
- * Attempt to create an observer instance for a value,
- * returns the new observer if successfully observed,
- * or the existing observer if the value already has one.
- */
-function observe (value, asRootData) {
-  if (!isObject(value) || value instanceof VNode) {
-    return
-  }
-  var ob;
-  if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
-    ob = value.__ob__;
-  } else if (
-    observerState.shouldConvert &&
-    !isServerRendering() &&
-    (Array.isArray(value) || isPlainObject(value)) &&
-    Object.isExtensible(value) &&
-    !value._isVue
-  ) {
-    ob = new Observer(value);
-  }
-  if (asRootData && ob) {
-    ob.vmCount++;
-  }
-  return ob
-}
-
-/**
- * Define a reactive property on an Object.
- */
-function defineReactive (
-  obj,
-  key,
-  val,
-  customSetter,
-  shallow
-) {
-  var dep = new Dep();
-
-  var property = Object.getOwnPropertyDescriptor(obj, key);
-  if (property && property.configurable === false) {
-    return
-  }
-
-  // cater for pre-defined getter/setters
-  var getter = property && property.get;
-  var setter = property && property.set;
-
-  var childOb = !shallow && observe(val);
-  Object.defineProperty(obj, key, {
-    enumerable: true,
-    configurable: true,
-    get: function reactiveGetter () {
-      var value = getter ? getter.call(obj) : val;
-      if (Dep.target) {
-        dep.depend();
-        if (childOb) {
-          childOb.dep.depend();
-          if (Array.isArray(value)) {
-            dependArray(value);
+
+    var childOb = !shallow && observe(val);
+    Object.defineProperty(obj, key, {
+      enumerable: true,
+      configurable: true,
+      get: function reactiveGetter () {
+        var value = getter ? getter.call(obj) : val;
+        if (Dep.target) {
+          dep.depend();
+          if (childOb) {
+            childOb.dep.depend();
+            if (Array.isArray(value)) {
+              dependArray(value);
+            }
           }
         }
+        return value
+      },
+      set: function reactiveSetter (newVal) {
+        var value = getter ? getter.call(obj) : val;
+        /* eslint-disable no-self-compare */
+        if (newVal === value || (newVal !== newVal && value !== value)) {
+          return
+        }
+        /* eslint-enable no-self-compare */
+        if (customSetter) {
+          customSetter();
+        }
+        // #7981: for accessor properties without setter
+        if (getter && !setter) { return }
+        if (setter) {
+          setter.call(obj, newVal);
+        } else {
+          val = newVal;
+        }
+        childOb = !shallow && observe(newVal);
+        dep.notify();
       }
-      return value
-    },
-    set: function reactiveSetter (newVal) {
-      var value = getter ? getter.call(obj) : val;
-      /* eslint-disable no-self-compare */
-      if (newVal === value || (newVal !== newVal && value !== value)) {
-        return
-      }
-      /* eslint-enable no-self-compare */
-      if ("development" !== 'production' && customSetter) {
-        customSetter();
-      }
-      if (setter) {
-        setter.call(obj, newVal);
-      } else {
-        val = newVal;
-      }
-      childOb = !shallow && observe(newVal);
-      dep.notify();
-    }
-  });
-}
-
-/**
- * Set a property on an object. Adds the new property and
- * triggers change notification if the property doesn't
- * already exist.
- */
-function set (target, key, val) {
-  if (Array.isArray(target) && isValidArrayIndex(key)) {
-    target.length = Math.max(target.length, key);
-    target.splice(key, 1, val);
-    return val
-  }
-  if (key in target && !(key in Object.prototype)) {
-    target[key] = val;
-    return val
-  }
-  var ob = (target).__ob__;
-  if (target._isVue || (ob && ob.vmCount)) {
-    "development" !== 'production' && warn(
-      'Avoid adding reactive properties to a Vue instance or its root $data ' +
-      'at runtime - declare it upfront in the data option.'
-    );
-    return val
-  }
-  if (!ob) {
-    target[key] = val;
-    return val
+    });
   }
-  defineReactive(ob.value, key, val);
-  ob.dep.notify();
-  return val
-}
 
-/**
- * Delete a property and trigger change if necessary.
- */
-
-
-/**
- * Collect dependencies on array elements when the array is touched, since
- * we cannot intercept array element access like property getters.
- */
-function dependArray (value) {
-  for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
-    e = value[i];
-    e && e.__ob__ && e.__ob__.dep.depend();
-    if (Array.isArray(e)) {
-      dependArray(e);
+  /**
+   * Set a property on an object. Adds the new property and
+   * triggers change notification if the property doesn't
+   * already exist.
+   */
+  function set (target, key, val) {
+    if (isUndef(target) || isPrimitive(target)
+    ) {
+      warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
     }
-  }
-}
-
-/*  */
-
-/**
- * Option overwriting strategies are functions that handle
- * how to merge a parent option value and a child option
- * value into the final value.
- */
-var strats = config.optionMergeStrategies;
-
-/**
- * Options with restrictions
- */
-{
-  strats.el = strats.propsData = function (parent, child, vm, key) {
-    if (!vm) {
+    if (Array.isArray(target) && isValidArrayIndex(key)) {
+      target.length = Math.max(target.length, key);
+      target.splice(key, 1, val);
+      return val
+    }
+    if (key in target && !(key in Object.prototype)) {
+      target[key] = val;
+      return val
+    }
+    var ob = (target).__ob__;
+    if (target._isVue || (ob && ob.vmCount)) {
       warn(
-        "option \"" + key + "\" can only be used during instance " +
-        'creation with the `new` keyword.'
+        'Avoid adding reactive properties to a Vue instance or its root $data ' +
+        'at runtime - declare it upfront in the data option.'
       );
+      return val
     }
-    return defaultStrat(parent, child)
-  };
-}
-
-/**
- * Helper that recursively merges two data objects together.
- */
-function mergeData (to, from) {
-  if (!from) { return to }
-  var key, toVal, fromVal;
-  var keys = Object.keys(from);
-  for (var i = 0; i < keys.length; i++) {
-    key = keys[i];
-    toVal = to[key];
-    fromVal = from[key];
-    if (!hasOwn(to, key)) {
-      set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
-      mergeData(toVal, fromVal);
-    }
-  }
-  return to
-}
-
-/**
- * Data
- */
-function mergeDataOrFn (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    // in a Vue.extend merge, both should be functions
-    if (!childVal) {
-      return parentVal
-    }
-    if (!parentVal) {
-      return childVal
-    }
-    // when parentVal & childVal are both present,
-    // we need to return a function that returns the
-    // merged result of both functions... no need to
-    // check if parentVal is a function here because
-    // it has to be a function to pass previous merges.
-    return function mergedDataFn () {
-      return mergeData(
-        typeof childVal === 'function' ? childVal.call(this, this) : childVal,
-        typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
-      )
+    if (!ob) {
+      target[key] = val;
+      return val
     }
-  } else {
-    return function mergedInstanceDataFn () {
-      // instance merge
-      var instanceData = typeof childVal === 'function'
-        ? childVal.call(vm, vm)
-        : childVal;
-      var defaultData = typeof parentVal === 'function'
-        ? parentVal.call(vm, vm)
-        : parentVal;
-      if (instanceData) {
-        return mergeData(instanceData, defaultData)
-      } else {
-        return defaultData
+    defineReactive$$1(ob.value, key, val);
+    ob.dep.notify();
+    return val
+  }
+
+  /**
+   * Collect dependencies on array elements when the array is touched, since
+   * we cannot intercept array element access like property getters.
+   */
+  function dependArray (value) {
+    for (var e = (void 0), i = 0, l = value.length; i < l; i++) {
+      e = value[i];
+      e && e.__ob__ && e.__ob__.dep.depend();
+      if (Array.isArray(e)) {
+        dependArray(e);
       }
     }
   }
-}
 
-strats.data = function (
-  parentVal,
-  childVal,
-  vm
-) {
-  if (!vm) {
-    if (childVal && typeof childVal !== 'function') {
-      "development" !== 'production' && warn(
-        'The "data" option should be a function ' +
-        'that returns a per-instance value in component ' +
-        'definitions.',
-        vm
-      );
+  /*  */
 
-      return parentVal
-    }
-    return mergeDataOrFn(parentVal, childVal)
-  }
-
-  return mergeDataOrFn(parentVal, childVal, vm)
-};
-
-/**
- * Hooks and props are merged as arrays.
- */
-function mergeHook (
-  parentVal,
-  childVal
-) {
-  return childVal
-    ? parentVal
-      ? parentVal.concat(childVal)
-      : Array.isArray(childVal)
-        ? childVal
-        : [childVal]
-    : parentVal
-}
-
-LIFECYCLE_HOOKS.forEach(function (hook) {
-  strats[hook] = mergeHook;
-});
-
-/**
- * Assets
- *
- * When a vm is present (instance creation), we need to do
- * a three-way merge between constructor options, instance
- * options and parent options.
- */
-function mergeAssets (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  var res = Object.create(parentVal || null);
-  if (childVal) {
-    "development" !== 'production' && assertObjectType(key, childVal, vm);
-    return extend(res, childVal)
-  } else {
-    return res
-  }
-}
-
-ASSET_TYPES.forEach(function (type) {
-  strats[type + 's'] = mergeAssets;
-});
-
-/**
- * Watchers.
- *
- * Watchers hashes should not overwrite one
- * another, so we merge them as arrays.
- */
-strats.watch = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  // work around Firefox's Object.prototype.watch...
-  if (parentVal === nativeWatch) { parentVal = undefined; }
-  if (childVal === nativeWatch) { childVal = undefined; }
-  /* istanbul ignore if */
-  if (!childVal) { return Object.create(parentVal || null) }
+  /**
+   * Option overwriting strategies are functions that handle
+   * how to merge a parent option value and a child option
+   * value into the final value.
+   */
+  var strats = config.optionMergeStrategies;
+
+  /**
+   * Options with restrictions
+   */
   {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = {};
-  extend(ret, parentVal);
-  for (var key$1 in childVal) {
-    var parent = ret[key$1];
-    var child = childVal[key$1];
-    if (parent && !Array.isArray(parent)) {
-      parent = [parent];
-    }
-    ret[key$1] = parent
-      ? parent.concat(child)
-      : Array.isArray(child) ? child : [child];
-  }
-  return ret
-};
-
-/**
- * Other object hashes.
- */
-strats.props =
-strats.methods =
-strats.inject =
-strats.computed = function (
-  parentVal,
-  childVal,
-  vm,
-  key
-) {
-  if (childVal && "development" !== 'production') {
-    assertObjectType(key, childVal, vm);
-  }
-  if (!parentVal) { return childVal }
-  var ret = Object.create(null);
-  extend(ret, parentVal);
-  if (childVal) { extend(ret, childVal); }
-  return ret
-};
-strats.provide = mergeDataOrFn;
-
-/**
- * Default strategy.
- */
-var defaultStrat = function (parentVal, childVal) {
-  return childVal === undefined
-    ? parentVal
-    : childVal
-};
-
-
-
-function assertObjectType (name, value, vm) {
-  if (!isPlainObject(value)) {
-    warn(
-      "Invalid value for option \"" + name + "\": expected an Object, " +
-      "but got " + (toRawType(value)) + ".",
-      vm
-    );
+    strats.el = strats.propsData = function (parent, child, vm, key) {
+      if (!vm) {
+        warn(
+          "option \"" + key + "\" can only be used during instance " +
+          'creation with the `new` keyword.'
+        );
+      }
+      return defaultStrat(parent, child)
+    };
   }
-}
-
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-
-/*  */
-
-/*  */
-
-/*  */
-/* globals MessageChannel */
-
-var callbacks = [];
-function flushCallbacks () {
-  var copies = callbacks.slice(0);
-  callbacks.length = 0;
-  for (var i = 0; i < copies.length; i++) {
-    copies[i]();
-  }
-}
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  channel.port1.onmessage = flushCallbacks;
-  
-} else {
-  /* istanbul ignore next */
-  
-}
 
-// Determine MicroTask defer implementation.
-/* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  
-} else {
-  // fallback to macro
-  
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-
-/*  */
-
-/*  */
-
-// these are reserved for web because they are directly compiled away
-// during template compilation
-var isReservedAttr = makeMap('style,class');
-
-// attributes that should be using props for binding
-var acceptValue = makeMap('input,textarea,option,select,progress');
-var mustUseProp = function (tag, type, attr) {
-  return (
-    (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
-    (attr === 'selected' && tag === 'option') ||
-    (attr === 'checked' && tag === 'input') ||
-    (attr === 'muted' && tag === 'video')
-  )
-};
-
-var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
-
-var isBooleanAttr = makeMap(
-  'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
-  'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
-  'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
-  'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
-  'truespeed,typemustmatch,visible'
-);
-
-/*  */
-
-/*  */
-
-
-
-var isHTMLTag = makeMap(
-  'html,body,base,head,link,meta,style,title,' +
-  'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
-  'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
-  'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
-  's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
-  'embed,object,param,source,canvas,script,noscript,del,ins,' +
-  'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
-  'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
-  'output,progress,select,textarea,' +
-  'details,dialog,menu,menuitem,summary,' +
-  'content,element,shadow,template,blockquote,iframe,tfoot'
-);
-
-// this map is intentionally selective, only covering SVG elements that may
-// contain child elements.
-var isSVG = makeMap(
-  'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
-  'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
-  true
-);
-
-var isPreTag = function (tag) { return tag === 'pre'; };
-
-var isReservedTag = function (tag) {
-  return isHTMLTag(tag) || isSVG(tag)
-};
-
-function getTagNamespace (tag) {
-  if (isSVG(tag)) {
-    return 'svg'
-  }
-  // basic support for MathML
-  // note it doesn't support other MathML elements being component roots
-  if (tag === 'math') {
-    return 'math'
-  }
-}
-
-
-
-var isTextInputType = makeMap('text,number,password,search,email,tel,url');
-
-/*  */
-
-/**
- * Query an element selector if it's not an element already.
- */
-
-/*  */
-
-var validDivisionCharRE = /[\w).+\-_$\]]/;
-
-function parseFilters (exp) {
-  var inSingle = false;
-  var inDouble = false;
-  var inTemplateString = false;
-  var inRegex = false;
-  var curly = 0;
-  var square = 0;
-  var paren = 0;
-  var lastFilterIndex = 0;
-  var c, prev, i, expression, filters;
-
-  for (i = 0; i < exp.length; i++) {
-    prev = c;
-    c = exp.charCodeAt(i);
-    if (inSingle) {
-      if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
-    } else if (inDouble) {
-      if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
-    } else if (inTemplateString) {
-      if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
-    } else if (inRegex) {
-      if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
-    } else if (
-      c === 0x7C && // pipe
-      exp.charCodeAt(i + 1) !== 0x7C &&
-      exp.charCodeAt(i - 1) !== 0x7C &&
-      !curly && !square && !paren
-    ) {
-      if (expression === undefined) {
-        // first filter, end of expression
-        lastFilterIndex = i + 1;
-        expression = exp.slice(0, i).trim();
-      } else {
-        pushFilter();
+  /**
+   * Helper that recursively merges two data objects together.
+   */
+  function mergeData (to, from) {
+    if (!from) { return to }
+    var key, toVal, fromVal;
+
+    var keys = hasSymbol
+      ? Reflect.ownKeys(from)
+      : Object.keys(from);
+
+    for (var i = 0; i < keys.length; i++) {
+      key = keys[i];
+      // in case the object is already observed...
+      if (key === '__ob__') { continue }
+      toVal = to[key];
+      fromVal = from[key];
+      if (!hasOwn(to, key)) {
+        set(to, key, fromVal);
+      } else if (
+        toVal !== fromVal &&
+        isPlainObject(toVal) &&
+        isPlainObject(fromVal)
+      ) {
+        mergeData(toVal, fromVal);
+      }
+    }
+    return to
+  }
+
+  /**
+   * Data
+   */
+  function mergeDataOrFn (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      // in a Vue.extend merge, both should be functions
+      if (!childVal) {
+        return parentVal
+      }
+      if (!parentVal) {
+        return childVal
+      }
+      // when parentVal & childVal are both present,
+      // we need to return a function that returns the
+      // merged result of both functions... no need to
+      // check if parentVal is a function here because
+      // it has to be a function to pass previous merges.
+      return function mergedDataFn () {
+        return mergeData(
+          typeof childVal === 'function' ? childVal.call(this, this) : childVal,
+          typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal
+        )
       }
     } else {
-      switch (c) {
-        case 0x22: inDouble = true; break         // "
-        case 0x27: inSingle = true; break         // '
-        case 0x60: inTemplateString = true; break // `
-        case 0x28: paren++; break                 // (
-        case 0x29: paren--; break                 // )
-        case 0x5B: square++; break                // [
-        case 0x5D: square--; break                // ]
-        case 0x7B: curly++; break                 // {
-        case 0x7D: curly--; break                 // }
-      }
-      if (c === 0x2f) { // /
-        var j = i - 1;
-        var p = (void 0);
-        // find first non-whitespace prev char
-        for (; j >= 0; j--) {
-          p = exp.charAt(j);
-          if (p !== ' ') { break }
-        }
-        if (!p || !validDivisionCharRE.test(p)) {
-          inRegex = true;
+      return function mergedInstanceDataFn () {
+        // instance merge
+        var instanceData = typeof childVal === 'function'
+          ? childVal.call(vm, vm)
+          : childVal;
+        var defaultData = typeof parentVal === 'function'
+          ? parentVal.call(vm, vm)
+          : parentVal;
+        if (instanceData) {
+          return mergeData(instanceData, defaultData)
+        } else {
+          return defaultData
         }
       }
     }
   }
 
-  if (expression === undefined) {
-    expression = exp.slice(0, i).trim();
-  } else if (lastFilterIndex !== 0) {
-    pushFilter();
-  }
-
-  function pushFilter () {
-    (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
-    lastFilterIndex = i + 1;
-  }
+  strats.data = function (
+    parentVal,
+    childVal,
+    vm
+  ) {
+    if (!vm) {
+      if (childVal && typeof childVal !== 'function') {
+        warn(
+          'The "data" option should be a function ' +
+          'that returns a per-instance value in component ' +
+          'definitions.',
+          vm
+        );
 
-  if (filters) {
-    for (i = 0; i < filters.length; i++) {
-      expression = wrapFilter(expression, filters[i]);
+        return parentVal
+      }
+      return mergeDataOrFn(parentVal, childVal)
     }
-  }
 
-  return expression
-}
+    return mergeDataOrFn(parentVal, childVal, vm)
+  };
 
-function wrapFilter (exp, filter) {
-  var i = filter.indexOf('(');
-  if (i < 0) {
-    // _f: resolveFilter
-    return ("_f(\"" + filter + "\")(" + exp + ")")
-  } else {
-    var name = filter.slice(0, i);
-    var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
-  }
-}
-
-/*  */
-
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
-var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
-
-var buildRegex = cached(function (delimiters) {
-  var open = delimiters[0].replace(regexEscapeRE, '\\$&');
-  var close = delimiters[1].replace(regexEscapeRE, '\\$&');
-  return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
-});
-
-
-
-function parseText (
-  text,
-  delimiters
-) {
-  var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
-  if (!tagRE.test(text)) {
-    return
-  }
-  var tokens = [];
-  var rawTokens = [];
-  var lastIndex = tagRE.lastIndex = 0;
-  var match, index, tokenValue;
-  while ((match = tagRE.exec(text))) {
-    index = match.index;
-    // push text token
-    if (index > lastIndex) {
-      rawTokens.push(tokenValue = text.slice(lastIndex, index));
-      tokens.push(JSON.stringify(tokenValue));
-    }
-    // tag token
-    var exp = parseFilters(match[1].trim());
-    tokens.push(("_s(" + exp + ")"));
-    rawTokens.push({ '@binding': exp });
-    lastIndex = index + match[0].length;
-  }
-  if (lastIndex < text.length) {
-    rawTokens.push(tokenValue = text.slice(lastIndex));
-    tokens.push(JSON.stringify(tokenValue));
-  }
-  return {
-    expression: tokens.join('+'),
-    tokens: rawTokens
-  }
-}
-
-/*  */
-
-function baseWarn (msg) {
-  console.error(("[Vue compiler]: " + msg));
-}
-
-function pluckModuleFunction (
-  modules,
-  key
-) {
-  return modules
-    ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
-    : []
-}
-
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
-  el.plain = false;
-}
-
-// add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
-  el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
-}
-
-function addDirective (
-  el,
-  name,
-  rawName,
-  value,
-  arg,
-  modifiers
-) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
-  el.plain = false;
-}
-
-function addHandler (
-  el,
-  name,
-  value,
-  modifiers,
-  important,
-  warn
-) {
-  modifiers = modifiers || emptyObject;
-  // warn prevent and passive modifier
-  /* istanbul ignore if */
-  if (
-    "development" !== 'production' && warn &&
-    modifiers.prevent && modifiers.passive
+  /**
+   * Hooks and props are merged as arrays.
+   */
+  function mergeHook (
+    parentVal,
+    childVal
   ) {
-    warn(
-      'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
-    );
-  }
-
-  // check capture modifier
-  if (modifiers.capture) {
-    delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
-  }
-  if (modifiers.once) {
-    delete modifiers.once;
-    name = '~' + name; // mark the event as once
-  }
-  /* istanbul ignore if */
-  if (modifiers.passive) {
-    delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
+    var res = childVal
+      ? parentVal
+        ? parentVal.concat(childVal)
+        : Array.isArray(childVal)
+          ? childVal
+          : [childVal]
+      : parentVal;
+    return res
+      ? dedupeHooks(res)
+      : res
   }
 
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
+  function dedupeHooks (hooks) {
+    var res = [];
+    for (var i = 0; i < hooks.length; i++) {
+      if (res.indexOf(hooks[i]) === -1) {
+        res.push(hooks[i]);
+      }
     }
+    return res
   }
 
-  var events;
-  if (modifiers.native) {
-    delete modifiers.native;
-    events = el.nativeEvents || (el.nativeEvents = {});
-  } else {
-    events = el.events || (el.events = {});
-  }
+  LIFECYCLE_HOOKS.forEach(function (hook) {
+    strats[hook] = mergeHook;
+  });
 
-  var newHandler = { value: value };
-  if (modifiers !== emptyObject) {
-    newHandler.modifiers = modifiers;
+  /**
+   * Assets
+   *
+   * When a vm is present (instance creation), we need to do
+   * a three-way merge between constructor options, instance
+   * options and parent options.
+   */
+  function mergeAssets (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    var res = Object.create(parentVal || null);
+    if (childVal) {
+      assertObjectType(key, childVal, vm);
+      return extend(res, childVal)
+    } else {
+      return res
+    }
   }
 
-  var handlers = events[name];
-  /* istanbul ignore if */
-  if (Array.isArray(handlers)) {
-    important ? handlers.unshift(newHandler) : handlers.push(newHandler);
-  } else if (handlers) {
-    events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
-  } else {
-    events[name] = newHandler;
-  }
-
-  el.plain = false;
-}
-
-function getBindingAttr (
-  el,
-  name,
-  getStatic
-) {
-  var dynamicValue =
-    getAndRemoveAttr(el, ':' + name) ||
-    getAndRemoveAttr(el, 'v-bind:' + name);
-  if (dynamicValue != null) {
-    return parseFilters(dynamicValue)
-  } else if (getStatic !== false) {
-    var staticValue = getAndRemoveAttr(el, name);
-    if (staticValue != null) {
-      return JSON.stringify(staticValue)
-    }
-  }
-}
-
-// note: this only removes the attr from the Array (attrsList) so that it
-// doesn't get processed by processAttrs.
-// By default it does NOT remove it from the map (attrsMap) because the map is
-// needed during codegen.
-function getAndRemoveAttr (
-  el,
-  name,
-  removeFromMap
-) {
-  var val;
-  if ((val = el.attrsMap[name]) != null) {
-    var list = el.attrsList;
-    for (var i = 0, l = list.length; i < l; i++) {
-      if (list[i].name === name) {
-        list.splice(i, 1);
-        break
+  ASSET_TYPES.forEach(function (type) {
+    strats[type + 's'] = mergeAssets;
+  });
+
+  /**
+   * Watchers.
+   *
+   * Watchers hashes should not overwrite one
+   * another, so we merge them as arrays.
+   */
+  strats.watch = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    // work around Firefox's Object.prototype.watch...
+    if (parentVal === nativeWatch) { parentVal = undefined; }
+    if (childVal === nativeWatch) { childVal = undefined; }
+    /* istanbul ignore if */
+    if (!childVal) { return Object.create(parentVal || null) }
+    {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = {};
+    extend(ret, parentVal);
+    for (var key$1 in childVal) {
+      var parent = ret[key$1];
+      var child = childVal[key$1];
+      if (parent && !Array.isArray(parent)) {
+        parent = [parent];
       }
+      ret[key$1] = parent
+        ? parent.concat(child)
+        : Array.isArray(child) ? child : [child];
     }
-  }
-  if (removeFromMap) {
-    delete el.attrsMap[name];
-  }
-  return val
-}
+    return ret
+  };
+
+  /**
+   * Other object hashes.
+   */
+  strats.props =
+  strats.methods =
+  strats.inject =
+  strats.computed = function (
+    parentVal,
+    childVal,
+    vm,
+    key
+  ) {
+    if (childVal && "development" !== 'production') {
+      assertObjectType(key, childVal, vm);
+    }
+    if (!parentVal) { return childVal }
+    var ret = Object.create(null);
+    extend(ret, parentVal);
+    if (childVal) { extend(ret, childVal); }
+    return ret
+  };
+  strats.provide = mergeDataOrFn;
 
-/*  */
+  /**
+   * Default strategy.
+   */
+  var defaultStrat = function (parentVal, childVal) {
+    return childVal === undefined
+      ? parentVal
+      : childVal
+  };
 
-function transformNode (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticClass = getAndRemoveAttr(el, 'class');
-  if ("development" !== 'production' && staticClass) {
-    var res = parseText(staticClass, options.delimiters);
-    if (res) {
+  function assertObjectType (name, value, vm) {
+    if (!isPlainObject(value)) {
       warn(
-        "class=\"" + staticClass + "\": " +
-        'Interpolation inside attributes has been removed. ' +
-        'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        "Invalid value for option \"" + name + "\": expected an Object, " +
+        "but got " + (toRawType(value)) + ".",
+        vm
       );
     }
   }
-  if (staticClass) {
-    el.staticClass = JSON.stringify(staticClass);
-  }
-  var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
-  if (classBinding) {
-    el.classBinding = classBinding;
-  }
-}
 
-function genData (el) {
-  var data = '';
-  if (el.staticClass) {
-    data += "staticClass:" + (el.staticClass) + ",";
-  }
-  if (el.classBinding) {
-    data += "class:" + (el.classBinding) + ",";
-  }
-  return data
-}
+  /*  */
+
+  /*  */
 
-var klass = {
-  staticKeys: ['staticClass'],
-  transformNode: transformNode,
-  genData: genData
-};
+  /*  */
 
-/*  */
+  var callbacks = [];
 
-var parseStyleText = cached(function (cssText) {
-  var res = {};
-  var listDelimiter = /;(?![^(]*\))/g;
-  var propertyDelimiter = /:(.+)/;
-  cssText.split(listDelimiter).forEach(function (item) {
-    if (item) {
-      var tmp = item.split(propertyDelimiter);
-      tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
+  function flushCallbacks () {
+    var copies = callbacks.slice(0);
+    callbacks.length = 0;
+    for (var i = 0; i < copies.length; i++) {
+      copies[i]();
     }
-  });
-  return res
-});
+  }
 
-// normalize possible array / string values into Object
+  // The nextTick behavior leverages the microtask queue, which can be accessed
+  // via either native Promise.then or MutationObserver.
+  // MutationObserver has wider support, however it is seriously bugged in
+  // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+  // completely stops working after triggering a few times... so, if native
+  // Promise is available, we will use it:
+  /* istanbul ignore next, $flow-disable-line */
+  if (typeof Promise !== 'undefined' && isNative(Promise)) ; else if (!isIE && typeof MutationObserver !== 'undefined' && (
+    isNative(MutationObserver) ||
+    // PhantomJS and iOS 7.x
+    MutationObserver.toString() === '[object MutationObserverConstructor]'
+  )) {
+    // Use MutationObserver where native Promise is not available,
+    // e.g. PhantomJS, iOS7, Android 4.4
+    // (#6466 MutationObserver is unreliable in IE11)
+    var counter = 1;
+    var observer = new MutationObserver(flushCallbacks);
+    var textNode = document.createTextNode(String(counter));
+    observer.observe(textNode, {
+      characterData: true
+    });
+  } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
 
+  /*  */
 
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
+  /*  */
 
-/*  */
+  // these are reserved for web because they are directly compiled away
+  // during template compilation
+  var isReservedAttr = makeMap('style,class');
 
-function transformNode$1 (el, options) {
-  var warn = options.warn || baseWarn;
-  var staticStyle = getAndRemoveAttr(el, 'style');
-  if (staticStyle) {
-    /* istanbul ignore if */
-    {
-      var res = parseText(staticStyle, options.delimiters);
-      if (res) {
-        warn(
-          "style=\"" + staticStyle + "\": " +
-          'Interpolation inside attributes has been removed. ' +
-          'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
-        );
-      }
-    }
-    el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
-  }
+  // attributes that should be using props for binding
+  var acceptValue = makeMap('input,textarea,option,select,progress');
+  var mustUseProp = function (tag, type, attr) {
+    return (
+      (attr === 'value' && acceptValue(tag)) && type !== 'button' ||
+      (attr === 'selected' && tag === 'option') ||
+      (attr === 'checked' && tag === 'input') ||
+      (attr === 'muted' && tag === 'video')
+    )
+  };
 
-  var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
-  if (styleBinding) {
-    el.styleBinding = styleBinding;
-  }
-}
+  var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
-function genData$1 (el) {
-  var data = '';
-  if (el.staticStyle) {
-    data += "staticStyle:" + (el.staticStyle) + ",";
-  }
-  if (el.styleBinding) {
-    data += "style:(" + (el.styleBinding) + "),";
-  }
-  return data
-}
-
-var style = {
-  staticKeys: ['staticStyle'],
-  transformNode: transformNode$1,
-  genData: genData$1
-};
-
-var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-
-
-
-
-function createCommonjsModule(fn, module) {
-	return module = { exports: {} }, fn(module, module.exports), module.exports;
-}
-
-var he = createCommonjsModule(function (module, exports) {
-/*! https://mths.be/he v1.1.1 by @mathias | MIT license */
-(function(root) {
-
-	// Detect free variables `exports`.
-	var freeExports = 'object' == 'object' && exports;
-
-	// Detect free variable `module`.
-	var freeModule = 'object' == 'object' && module &&
-		module.exports == freeExports && module;
-
-	// Detect free variable `global`, from Node.js or Browserified code,
-	// and use it as `root`.
-	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
-	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
-		root = freeGlobal;
-	}
-
-	/*--------------------------------------------------------------------------*/
-
-	// All astral symbols.
-	var regexAstralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
-	// All ASCII symbols (not just printable ASCII) except those listed in the
-	// first column of the overrides table.
-	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides
-	var regexAsciiWhitelist = /[\x01-\x7F]/g;
-	// All BMP symbols that are not ASCII newlines, printable ASCII symbols, or
-	// code points listed in the first column of the overrides table on
-	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides.
-	var regexBmpWhitelist = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g;
-
-	var regexEncodeNonAscii = /<\u20D2|=\u20E5|>\u20D2|\u205F\u200A|\u219D\u0338|\u2202\u0338|\u2220\u20D2|\u2229\uFE00|\u222A\uFE00|\u223C\u20D2|\u223D\u0331|\u223E\u0333|\u2242\u0338|\u224B\u0338|\u224D\u20D2|\u224E\u0338|\u224F\u0338|\u2250\u0338|\u2261\u20E5|\u2264\u20D2|\u2265\u20D2|\u2266\u0338|\u2267\u0338|\u2268\uFE00|\u2269\uFE00|\u226A\u0338|\u226A\u20D2|\u226B\u0338|\u226B\u20D2|\u227F\u0338|\u2282\u20D2|\u2283\u20D2|\u228A\uFE00|\u228B\uFE00|\u228F\u0338|\u2290\u0338|\u2293\uFE00|\u2294\uFE00|\u22B4\u20D2|\u22B5\u20D2|\u22D8\u0338|\u22D9\u0338|\u22DA\uFE00|\u22DB\uFE00|\u22F5\u0338|\u22F9\u0338|\u2933\u0338|\u29CF\u0338|\u29D0\u0338|\u2A6D\u0338|\u2A70\u0338|\u2A7D\u0338|\u2A7E\u0338|\u2AA1\u0338|\u2AA2\u0338|\u2AAC\uFE00|\u2AAD\uFE00|\u2AAF\u0338|\u2AB0\u0338|\u2AC5\u0338|\u2AC6\u0338|\u2ACB\uFE00|\u2ACC\uFE00|\u2AFD\u20E5|[\xA0-\u0113\u0116-\u0122\u0124-\u012B\u012E-\u014D\u0150-\u017E\u0192\u01B5\u01F5\u0237\u02C6\u02C7\u02D8-\u02DD\u0311\u0391-\u03A1\u03A3-\u03A9\u03B1-\u03C9\u03D1\u03D2\u03D5\u03D6\u03DC\u03DD\u03F0\u03F1\u03F5\u03F6\u0401-\u040C\u040E-\u044F\u0451-\u045C\u045E\u045F\u2002-\u2005\u2007-\u2010\u2013-\u2016\u2018-\u201A\u201C-\u201E\u2020-\u2022\u2025\u2026\u2030-\u2035\u2039\u203A\u203E\u2041\u2043\u2044\u204F\u2057\u205F-\u2063\u20AC\u20DB\u20DC\u2102\u2105\u210A-\u2113\u2115-\u211E\u2122\u2124\u2127-\u2129\u212C\u212D\u212F-\u2131\u2133-\u2138\u2145-\u2148\u2153-\u215E\u2190-\u219B\u219D-\u21A7\u21A9-\u21AE\u21B0-\u21B3\u21B5-\u21B7\u21BA-\u21DB\u21DD\u21E4\u21E5\u21F5\u21FD-\u2205\u2207-\u2209\u220B\u220C\u220F-\u2214\u2216-\u2218\u221A\u221D-\u2238\u223A-\u2257\u2259\u225A\u225C\u225F-\u2262\u2264-\u228B\u228D-\u229B\u229D-\u22A5\u22A7-\u22B0\u22B2-\u22BB\u22BD-\u22DB\u22DE-\u22E3\u22E6-\u22F7\u22F9-\u22FE\u2305\u2306\u2308-\u2310\u2312\u2313\u2315\u2316\u231C-\u231F\u2322\u2323\u232D\u232E\u2336\u233D\u233F\u237C\u23B0\u23B1\u23B4-\u23B6\u23DC-\u23DF\u23E2\u23E7\u2423\u24C8\u2500\u2502\u250C\u2510\u2514\u2518\u251C\u2524\u252C\u2534\u253C\u2550-\u256C\u2580\u2584\u2588\u2591-\u2593\u25A1\u25AA\u25AB\u25AD\u25AE\u25B1\u25B3-\u25B5\u25B8\u25B9\u25BD-\u25BF\u25C2\u25C3\u25CA\u25CB\u25EC\u25EF\u25F8-\u25FC\u2605\u2606\u260E\u2640\u2642\u2660\u2663\u2665\u2666\u266A\u266D-\u266F\u2713\u2717\u2720\u2736\u2758\u2772\u2773\u27C8\u27C9\u27E6-\u27ED\u27F5-\u27FA\u27FC\u27FF\u2902-\u2905\u290C-\u2913\u2916\u2919-\u2920\u2923-\u292A\u2933\u2935-\u2939\u293C\u293D\u2945\u2948-\u294B\u294E-\u2976\u2978\u2979\u297B-\u297F\u2985\u2986\u298B-\u2996\u299A\u299C\u299D\u29A4-\u29B7\u29B9\u29BB\u29BC\u29BE-\u29C5\u29C9\u29CD-\u29D0\u29DC-\u29DE\u29E3-\u29E5\u29EB\u29F4\u29F6\u2A00-\u2A02\u2A04\u2A06\u2A0C\u2A0D\u2A10-\u2A17\u2A22-\u2A27\u2A29\u2A2A\u2A2D-\u2A31\u2A33-\u2A3C\u2A3F\u2A40\u2A42-\u2A4D\u2A50\u2A53-\u2A58\u2A5A-\u2A5D\u2A5F\u2A66\u2A6A\u2A6D-\u2A75\u2A77-\u2A9A\u2A9D-\u2AA2\u2AA4-\u2AB0\u2AB3-\u2AC8\u2ACB\u2ACC\u2ACF-\u2ADB\u2AE4\u2AE6-\u2AE9\u2AEB-\u2AF3\u2AFD\uFB00-\uFB04]|\uD835[\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDCCF\uDD04\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDD6B]/g;
-	var encodeMap = 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','\u2A73':'Esim','\u2A77':'eDDot','\u2A78':'equivDD','\u2A79':'ltcir','\u2A7A':'gtcir','\u2A7B':'ltquest','\u2A7C':'gtquest','\u2A7D':'les','\u2A7D\u0338':'nles','\u2A7E':'ges','\u2A7E\u0338':'nges','\u2A7F':'lesdot','\u2A80':'gesdot','\u2A81':'lesdoto','\u2A82':'gesdoto','\u2A83':'lesdotor','\u2A84':'gesdotol','\u2A85':'lap','\u2A86':'gap','\u2A87':'lne','\u2A88':'gne','\u2A89':'lnap','\u2A8A':'gnap','\u2A8B':'lEg','\u2A8C':'gEl','\u2A8D':'lsime','\u2A8E':'gsime','\u2A8F':'lsimg','\u2A90':'gsiml','\u2A91':'lgE','\u2A92':'glE','\u2A93':'lesges','\u2A94':'gesles','\u2A95':'els','\u2A96':'egs','\u2A97':'elsdot','\u2A98':'egsdot','\u2A99':'el','\u2A9A':'eg','\u2A9D':'siml','\u2A9E':'simg','\u2A9F':'simlE','\u2AA0':'simgE','\u2AA1':'LessLess','\u2AA1\u0338':'NotNestedLessLess','\u2AA2':'GreaterGreater','\u2AA2\u0338':'NotNestedGreaterGreater','\u2AA4':'glj','\u2AA5':'gla','\u2AA6':'ltcc','\u2AA7':'gtcc','\u2AA8':'lescc','\u2AA9':'gescc','\u2AAA':'smt','\u2AAB':'lat','\u2AAC':'smte','\u2AAC\uFE00':'smtes','\u2AAD':'late','\u2AAD\uFE00':'lates','\u2AAE':'bumpE','\u2AAF':'pre','\u2AAF\u0338':'npre','\u2AB0':'sce','\u2AB0\u0338':'nsce','\u2AB3':'prE','\u2AB4':'scE','\u2AB5':'prnE','\u2AB6':'scnE','\u2AB7':'prap','\u2AB8':'scap','\u2AB9':'prnap','\u2ABA':'scnap','\u2ABB':'Pr','\u2ABC':'Sc','\u2ABD':'subdot','\u2ABE':'supdot','\u2ABF':'subplus','\u2AC0':'supplus','\u2AC1':'submult','\u2AC2':'supmult','\u2AC3':'subedot','\u2AC4':'supedot','\u2AC5':'subE','\u2AC5\u0338':'nsubE','\u2AC6':'supE','\u2AC6\u0338':'nsupE','\u2AC7':'subsim','\u2AC8':'supsim','\u2ACB\uFE00':'vsubnE','\u2ACB':'subnE','\u2ACC\uFE00':'vsupnE','\u2ACC':'supnE','\u2ACF':'csub','\u2AD0':'csup','\u2AD1':'csube','\u2AD2':'csupe','\u2AD3':'subsup','\u2AD4':'supsub','\u2AD5':'subsub','\u2AD6':'supsup','\u2AD7':'suphsub','\u2AD8':'supdsub','\u2AD9':'forkv','\u2ADA':'topfork','\u2ADB':'mlcp','\u2AE4':'Dashv','\u2AE6':'Vdashl','\u2AE7':'Barv','\u2AE8':'vBar','\u2AE9':'vBarv','\u2AEB':'Vbar','\u2AEC':'Not','\u2AED':'bNot','\u2AEE':'rnmid','\u2AEF':'cirmid','\u2AF0':'midcir','\u2AF1':'topcir','\u2AF2':'nhpar','\u2AF3':'parsim','\u2AFD':'parsl','\u2AFD\u20E5':'nparsl','\u266D':'flat','\u266E':'natur','\u266F':'sharp','\xA4':'curren','\xA2':'cent','$':'dollar','\xA3':'pound','\xA5':'yen','\u20AC':'euro','\xB9':'sup1','\xBD':'half','\u2153':'frac13','\xBC':'frac14','\u2155':'frac15','\u2159':'frac16','\u215B':'frac18','\xB2':'sup2','\u2154':'frac23','\u2156':'frac25','\xB3':'sup3','\xBE':'frac34','\u2157':'frac35','\u215C':'frac38','\u2158':'frac45','\u215A':'frac56','\u215D':'frac58','\u215E':'frac78','\uD835\uDCB6':'ascr','\uD835\uDD52':'aopf','\uD835\uDD1E':'afr','\uD835\uDD38':'Aopf','\uD835\uDD04':'Afr','\uD835\uDC9C':'Ascr','\xAA':'ordf','\xE1':'aacute','\xC1':'Aacute','\xE0':'agrave','\xC0':'Agrave','\u0103':'abreve','\u0102':'Abreve','\xE2':'acirc','\xC2':'Acirc','\xE5':'aring','\xC5':'angst','\xE4':'auml','\xC4':'Auml','\xE3':'atilde','\xC3':'Atilde','\u0105':'aogon','\u0104':'Aogon','\u0101':'amacr','\u0100':'Amacr','\xE6':'aelig','\xC6':'AElig','\uD835\uDCB7':'bscr','\uD835\uDD53':'bopf','\uD835\uDD1F':'bfr','\uD835\uDD39':'Bopf','\u212C':'Bscr','\uD835\uDD05':'Bfr','\uD835\uDD20':'cfr','\uD835\uDCB8':'cscr','\uD835\uDD54':'copf','\u212D':'Cfr','\uD835\uDC9E':'Cscr','\u2102':'Copf','\u0107':'cacute','\u0106':'Cacute','\u0109':'ccirc','\u0108':'Ccirc','\u010D':'ccaron','\u010C':'Ccaron','\u010B':'cdot','\u010A':'Cdot','\xE7':'ccedil','\xC7':'Ccedil','\u2105':'incare','\uD835\uDD21':'dfr','\u2146':'dd','\uD835\uDD55':'dopf','\uD835\uDCB9':'dscr','\uD835\uDC9F':'Dscr','\uD835\uDD07':'Dfr','\u2145':'DD','\uD835\uDD3B':'Dopf','\u010F':'dcaron','\u010E':'Dcaron','\u0111':'dstrok','\u0110':'Dstrok','\xF0':'eth','\xD0':'ETH','\u2147':'ee','\u212F':'escr','\uD835\uDD22':'efr','\uD835\uDD56':'eopf','\u2130':'Escr','\uD835\uDD08':'Efr','\uD835\uDD3C':'Eopf','\xE9':'eacute','\xC9':'Eacute','\xE8':'egrave','\xC8':'Egrave','\xEA':'ecirc','\xCA':'Ecirc','\u011B':'ecaron','\u011A':'Ecaron','\xEB':'euml','\xCB':'Euml','\u0117':'edot','\u0116':'Edot','\u0119':'eogon','\u0118':'Eogon','\u0113':'emacr','\u0112':'Emacr','\uD835\uDD23':'ffr','\uD835\uDD57':'fopf','\uD835\uDCBB':'fscr','\uD835\uDD09':'Ffr','\uD835\uDD3D':'Fopf','\u2131':'Fscr','\uFB00':'fflig','\uFB03':'ffilig','\uFB04':'ffllig','\uFB01':'filig','fj':'fjlig','\uFB02':'fllig','\u0192':'fnof','\u210A':'gscr','\uD835\uDD58':'gopf','\uD835\uDD24':'gfr','\uD835\uDCA2':'Gscr','\uD835\uDD3E':'Gopf','\uD835\uDD0A':'Gfr','\u01F5':'gacute','\u011F':'gbreve','\u011E':'Gbreve','\u011D':'gcirc','\u011C':'Gcirc','\u0121':'gdot','\u0120':'Gdot','\u0122':'Gcedil','\uD835\uDD25':'hfr','\u210E':'planckh','\uD835\uDCBD':'hscr','\uD835\uDD59':'hopf','\u210B':'Hscr','\u210C':'Hfr','\u210D':'Hopf','\u0125':'hcirc','\u0124':'Hcirc','\u210F':'hbar','\u0127':'hstrok','\u0126':'Hstrok','\uD835\uDD5A':'iopf','\uD835\uDD26':'ifr','\uD835\uDCBE':'iscr','\u2148':'ii','\uD835\uDD40':'Iopf','\u2110':'Iscr','\u2111':'Im','\xED':'iacute','\xCD':'Iacute','\xEC':'igrave','\xCC':'Igrave','\xEE':'icirc','\xCE':'Icirc','\xEF':'iuml','\xCF':'Iuml','\u0129':'itilde','\u0128':'Itilde','\u0130':'Idot','\u012F':'iogon','\u012E':'Iogon','\u012B':'imacr','\u012A':'Imacr','\u0133':'ijlig','\u0132':'IJlig','\u0131':'imath','\uD835\uDCBF':'jscr','\uD835\uDD5B':'jopf','\uD835\uDD27':'jfr','\uD835\uDCA5':'Jscr','\uD835\uDD0D':'Jfr','\uD835\uDD41':'Jopf','\u0135':'jcirc','\u0134':'Jcirc','\u0237':'jmath','\uD835\uDD5C':'kopf','\uD835\uDCC0':'kscr','\uD835\uDD28':'kfr','\uD835\uDCA6':'Kscr','\uD835\uDD42':'Kopf','\uD835\uDD0E':'Kfr','\u0137':'kcedil','\u0136':'Kcedil','\uD835\uDD29':'lfr','\uD835\uDCC1':'lscr','\u2113':'ell','\uD835\uDD5D':'lopf','\u2112':'Lscr','\uD835\uDD0F':'Lfr','\uD835\uDD43':'Lopf','\u013A':'lacute','\u0139':'Lacute','\u013E':'lcaron','\u013D':'Lcaron','\u013C':'lcedil','\u013B':'Lcedil','\u0142':'lstrok','\u0141':'Lstrok','\u0140':'lmidot','\u013F':'Lmidot','\uD835\uDD2A':'mfr','\uD835\uDD5E':'mopf','\uD835\uDCC2':'mscr','\uD835\uDD10':'Mfr','\uD835\uDD44':'Mopf','\u2133':'Mscr','\uD835\uDD2B':'nfr','\uD835\uDD5F':'nopf','\uD835\uDCC3':'nscr','\u2115':'Nopf','\uD835\uDCA9':'Nscr','\uD835\uDD11':'Nfr','\u0144':'nacute','\u0143':'Nacute','\u0148':'ncaron','\u0147':'Ncaron','\xF1':'ntilde','\xD1':'Ntilde','\u0146':'ncedil','\u0145':'Ncedil','\u2116':'numero','\u014B':'eng','\u014A':'ENG','\uD835\uDD60':'oopf','\uD835\uDD2C':'ofr','\u2134':'oscr','\uD835\uDCAA':'Oscr','\uD835\uDD12':'Ofr','\uD835\uDD46':'Oopf','\xBA':'ordm','\xF3':'oacute','\xD3':'Oacute','\xF2':'ograve','\xD2':'Ograve','\xF4':'ocirc','\xD4':'Ocirc','\xF6':'ouml','\xD6':'Ouml','\u0151':'odblac','\u0150':'Odblac','\xF5':'otilde','\xD5':'Otilde','\xF8':'oslash','\xD8':'Oslash','\u014D':'omacr','\u014C':'Omacr','\u0153':'oelig','\u0152':'OElig','\uD835\uDD2D':'pfr','\uD835\uDCC5':'pscr','\uD835\uDD61':'popf','\u2119':'Popf','\uD835\uDD13':'Pfr','\uD835\uDCAB':'Pscr','\uD835\uDD62':'qopf','\uD835\uDD2E':'qfr','\uD835\uDCC6':'qscr','\uD835\uDCAC':'Qscr','\uD835\uDD14':'Qfr','\u211A':'Qopf','\u0138':'kgreen','\uD835\uDD2F':'rfr','\uD835\uDD63':'ropf','\uD835\uDCC7':'rscr','\u211B':'Rscr','\u211C':'Re','\u211D':'Ropf','\u0155':'racute','\u0154':'Racute','\u0159':'rcaron','\u0158':'Rcaron','\u0157':'rcedil','\u0156':'Rcedil','\uD835\uDD64':'sopf','\uD835\uDCC8':'sscr','\uD835\uDD30':'sfr','\uD835\uDD4A':'Sopf','\uD835\uDD16':'Sfr','\uD835\uDCAE':'Sscr','\u24C8':'oS','\u015B':'sacute','\u015A':'Sacute','\u015D':'scirc','\u015C':'Scirc','\u0161':'scaron','\u0160':'Scaron','\u015F':'scedil','\u015E':'Scedil','\xDF':'szlig','\uD835\uDD31':'tfr','\uD835\uDCC9':'tscr','\uD835\uDD65':'topf','\uD835\uDCAF':'Tscr','\uD835\uDD17':'Tfr','\uD835\uDD4B':'Topf','\u0165':'tcaron','\u0164':'Tcaron','\u0163':'tcedil','\u0162':'Tcedil','\u2122':'trade','\u0167':'tstrok','\u0166':'Tstrok','\uD835\uDCCA':'uscr','\uD835\uDD66':'uopf','\uD835\uDD32':'ufr','\uD835\uDD4C':'Uopf','\uD835\uDD18':'Ufr','\uD835\uDCB0':'Uscr','\xFA':'uacute','\xDA':'Uacute','\xF9':'ugrave','\xD9':'Ugrave','\u016D':'ubreve','\u016C':'Ubreve','\xFB':'ucirc','\xDB':'Ucirc','\u016F':'uring','\u016E':'Uring','\xFC':'uuml','\xDC':'Uuml','\u0171':'udblac','\u0170':'Udblac','\u0169':'utilde','\u0168':'Utilde','\u0173':'uogon','\u0172':'Uogon','\u016B':'umacr','\u016A':'Umacr','\uD835\uDD33':'vfr','\uD835\uDD67':'vopf','\uD835\uDCCB':'vscr','\uD835\uDD19':'Vfr','\uD835\uDD4D':'Vopf','\uD835\uDCB1':'Vscr','\uD835\uDD68':'wopf','\uD835\uDCCC':'wscr','\uD835\uDD34':'wfr','\uD835\uDCB2':'Wscr','\uD835\uDD4E':'Wopf','\uD835\uDD1A':'Wfr','\u0175':'wcirc','\u0174':'Wcirc','\uD835\uDD35':'xfr','\uD835\uDCCD':'xscr','\uD835\uDD69':'xopf','\uD835\uDD4F':'Xopf','\uD835\uDD1B':'Xfr','\uD835\uDCB3':'Xscr','\uD835\uDD36':'yfr','\uD835\uDCCE':'yscr','\uD835\uDD6A':'yopf','\uD835\uDCB4':'Yscr','\uD835\uDD1C':'Yfr','\uD835\uDD50':'Yopf','\xFD':'yacute','\xDD':'Yacute','\u0177':'ycirc','\u0176':'Ycirc','\xFF':'yuml','\u0178':'Yuml','\uD835\uDCCF':'zscr','\uD835\uDD37':'zfr','\uD835\uDD6B':'zopf','\u2128':'Zfr','\u2124':'Zopf','\uD835\uDCB5':'Zscr','\u017A':'zacute','\u0179':'Zacute','\u017E':'zcaron','\u017D':'Zcaron','\u017C':'zdot','\u017B':'Zdot','\u01B5':'imped','\xFE':'thorn','\xDE':'THORN','\u0149':'napos','\u03B1':'alpha','\u0391':'Alpha','\u03B2':'beta','\u0392':'Beta','\u03B3':'gamma','\u0393':'Gamma','\u03B4':'delta','\u0394':'Delta','\u03B5':'epsi','\u03F5':'epsiv','\u0395':'Epsilon','\u03DD':'gammad','\u03DC':'Gammad','\u03B6':'zeta','\u0396':'Zeta','\u03B7':'eta','\u0397':'Eta','\u03B8':'theta','\u03D1':'thetav','\u0398':'Theta','\u03B9':'iota','\u0399':'Iota','\u03BA':'kappa','\u03F0':'kappav','\u039A':'Kappa','\u03BB':'lambda','\u039B':'Lambda','\u03BC':'mu','\xB5':'micro','\u039C':'Mu','\u03BD':'nu','\u039D':'Nu','\u03BE':'xi','\u039E':'Xi','\u03BF':'omicron','\u039F':'Omicron','\u03C0':'pi','\u03D6':'piv','\u03A0':'Pi','\u03C1':'rho','\u03F1':'rhov','\u03A1':'Rho','\u03C3':'sigma','\u03A3':'Sigma','\u03C2':'sigmaf','\u03C4':'tau','\u03A4':'Tau','\u03C5':'upsi','\u03A5':'Upsilon','\u03D2':'Upsi','\u03C6':'phi','\u03D5':'phiv','\u03A6':'Phi','\u03C7':'chi','\u03A7':'Chi','\u03C8':'psi','\u03A8':'Psi','\u03C9':'omega','\u03A9':'ohm','\u0430':'acy','\u0410':'Acy','\u0431':'bcy','\u0411':'Bcy','\u0432':'vcy','\u0412':'Vcy','\u0433':'gcy','\u0413':'Gcy','\u0453':'gjcy','\u0403':'GJcy','\u0434':'dcy','\u0414':'Dcy','\u0452':'djcy','\u0402':'DJcy','\u0435':'iecy','\u0415':'IEcy','\u0451':'iocy','\u0401':'IOcy','\u0454':'jukcy','\u0404':'Jukcy','\u0436':'zhcy','\u0416':'ZHcy','\u0437':'zcy','\u0417':'Zcy','\u0455':'dscy','\u0405':'DScy','\u0438':'icy','\u0418':'Icy','\u0456':'iukcy','\u0406':'Iukcy','\u0457':'yicy','\u0407':'YIcy','\u0439':'jcy','\u0419':'Jcy','\u0458':'jsercy','\u0408':'Jsercy','\u043A':'kcy','\u041A':'Kcy','\u045C':'kjcy','\u040C':'KJcy','\u043B':'lcy','\u041B':'Lcy','\u0459':'ljcy','\u0409':'LJcy','\u043C':'mcy','\u041C':'Mcy','\u043D':'ncy','\u041D':'Ncy','\u045A':'njcy','\u040A':'NJcy','\u043E':'ocy','\u041E':'Ocy','\u043F':'pcy','\u041F':'Pcy','\u0440':'rcy','\u0420':'Rcy','\u0441':'scy','\u0421':'Scy','\u0442':'tcy','\u0422':'Tcy','\u045B':'tshcy','\u040B':'TSHcy','\u0443':'ucy','\u0423':'Ucy','\u045E':'ubrcy','\u040E':'Ubrcy','\u0444':'fcy','\u0424':'Fcy','\u0445':'khcy','\u0425':'KHcy','\u0446':'tscy','\u0426':'TScy','\u0447':'chcy','\u0427':'CHcy','\u045F':'dzcy','\u040F':'DZcy','\u0448':'shcy','\u0428':'SHcy','\u0449':'shchcy','\u0429':'SHCHcy','\u044A':'hardcy','\u042A':'HARDcy','\u044B':'ycy','\u042B':'Ycy','\u044C':'softcy','\u042C':'SOFTcy','\u044D':'ecy','\u042D':'Ecy','\u044E':'yucy','\u042E':'YUcy','\u044F':'yacy','\u042F':'YAcy','\u2135':'aleph','\u2136':'beth','\u2137':'gimel','\u2138':'daleth'};
-
-	var regexEscape = /["&'<>`]/g;
-	var escapeMap = {
-		'"': '&quot;',
-		'&': '&amp;',
-		'\'': '&#x27;',
-		'<': '&lt;',
-		// See https://mathiasbynens.be/notes/ambiguous-ampersands: in HTML, the
-		// following is not strictly necessary unless it’s part of a tag or an
-		// unquoted attribute value. We’re only escaping it to support those
-		// situations, and for XML support.
-		'>': '&gt;',
-		// In Internet Explorer ≤ 8, the backtick character can be used
-		// to break out of (un)quoted attribute values or HTML comments.
-		// See http://html5sec.org/#102, http://html5sec.org/#108, and
-		// http://html5sec.org/#133.
-		'`': '&#x60;'
-	};
-
-	var regexInvalidEntity = /&#(?:[xX][^a-fA-F0-9]|[^0-9xX])/;
-	var regexInvalidRawCodePoint = /[\0-\x08\x0B\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]|[\uD83F\uD87F\uD8BF\uD8FF\uD93F\uD97F\uD9BF\uD9FF\uDA3F\uDA7F\uDABF\uDAFF\uDB3F\uDB7F\uDBBF\uDBFF][\uDFFE\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
-	var regexDecode = /&#([0-9]+)(;?)|&#[xX]([a-fA-F0-9]+)(;?)|&([0-9a-zA-Z]+);|&(Aacute|Agrave|Atilde|Ccedil|Eacute|Egrave|Iacute|Igrave|Ntilde|Oacute|Ograve|Oslash|Otilde|Uacute|Ugrave|Yacute|aacute|agrave|atilde|brvbar|ccedil|curren|divide|eacute|egrave|frac12|frac14|frac34|iacute|igrave|iquest|middot|ntilde|oacute|ograve|oslash|otilde|plusmn|uacute|ugrave|yacute|AElig|Acirc|Aring|Ecirc|Icirc|Ocirc|THORN|Ucirc|acirc|acute|aelig|aring|cedil|ecirc|icirc|iexcl|laquo|micro|ocirc|pound|raquo|szlig|thorn|times|ucirc|Auml|COPY|Euml|Iuml|Ouml|QUOT|Uuml|auml|cent|copy|euml|iuml|macr|nbsp|ordf|ordm|ouml|para|quot|sect|sup1|sup2|sup3|uuml|yuml|AMP|ETH|REG|amp|deg|eth|not|reg|shy|uml|yen|GT|LT|gt|lt)([=a-zA-Z0-9])?/g;
-	var decodeMap = {'aacute':'\xE1','Aacute':'\xC1','abreve':'\u0103','Abreve':'\u0102','ac':'\u223E','acd':'\u223F','acE':'\u223E\u0333','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','acy':'\u0430','Acy':'\u0410','aelig':'\xE6','AElig':'\xC6','af':'\u2061','afr':'\uD835\uDD1E','Afr':'\uD835\uDD04','agrave':'\xE0','Agrave':'\xC0','alefsym':'\u2135','aleph':'\u2135','alpha':'\u03B1','Alpha':'\u0391','amacr':'\u0101','Amacr':'\u0100','amalg':'\u2A3F','amp':'&','AMP':'&','and':'\u2227','And':'\u2A53','andand':'\u2A55','andd':'\u2A5C','andslope':'\u2A58','andv':'\u2A5A','ang':'\u2220','ange':'\u29A4','angle':'\u2220','angmsd':'\u2221','angmsdaa':'\u29A8','angmsdab':'\u29A9','angmsdac':'\u29AA','angmsdad':'\u29AB','angmsdae':'\u29AC','angmsdaf':'\u29AD','angmsdag':'\u29AE','angmsdah':'\u29AF','angrt':'\u221F','angrtvb':'\u22BE','angrtvbd':'\u299D','angsph':'\u2222','angst':'\xC5','angzarr':'\u237C','aogon':'\u0105','Aogon':'\u0104','aopf':'\uD835\uDD52','Aopf':'\uD835\uDD38','ap':'\u2248','apacir':'\u2A6F','ape':'\u224A','apE':'\u2A70','apid':'\u224B','apos':'\'','ApplyFunction':'\u2061','approx':'\u2248','approxeq':'\u224A','aring':'\xE5','Aring':'\xC5','ascr':'\uD835\uDCB6','Ascr':'\uD835\uDC9C','Assign':'\u2254','ast':'*','asymp':'\u2248','asympeq':'\u224D','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','awconint':'\u2233','awint':'\u2A11','backcong':'\u224C','backepsilon':'\u03F6','backprime':'\u2035','backsim':'\u223D','backsimeq':'\u22CD','Backslash':'\u2216','Barv':'\u2AE7','barvee':'\u22BD','barwed':'\u2305','Barwed':'\u2306','barwedge':'\u2305','bbrk':'\u23B5','bbrktbrk':'\u23B6','bcong':'\u224C','bcy':'\u0431','Bcy':'\u0411','bdquo':'\u201E','becaus':'\u2235','because':'\u2235','Because':'\u2235','bemptyv':'\u29B0','bepsi':'\u03F6','bernou':'\u212C','Bernoullis':'\u212C','beta':'\u03B2','Beta':'\u0392','beth':'\u2136','between':'\u226C','bfr':'\uD835\uDD1F','Bfr':'\uD835\uDD05','bigcap':'\u22C2','bigcirc':'\u25EF','bigcup':'\u22C3','bigodot':'\u2A00','bigoplus':'\u2A01','bigotimes':'\u2A02','bigsqcup':'\u2A06','bigstar':'\u2605','bigtriangledown':'\u25BD','bigtriangleup':'\u25B3','biguplus':'\u2A04','bigvee':'\u22C1','bigwedge':'\u22C0','bkarow':'\u290D','blacklozenge':'\u29EB','blacksquare':'\u25AA','blacktriangle':'\u25B4','blacktriangledown':'\u25BE','blacktriangleleft':'\u25C2','blacktriangleright':'\u25B8','blank':'\u2423','blk12':'\u2592','blk14':'\u2591','blk34':'\u2593','block':'\u2588','bne':'=\u20E5','bnequiv':'\u2261\u20E5','bnot':'\u2310','bNot':'\u2AED','bopf':'\uD835\uDD53','Bopf':'\uD835\uDD39','bot':'\u22A5','bottom':'\u22A5','bowtie':'\u22C8','boxbox':'\u29C9','boxdl':'\u2510','boxdL':'\u2555','boxDl':'\u2556','boxDL':'\u2557','boxdr':'\u250C','boxdR':'\u2552','boxDr':'\u2553','boxDR':'\u2554','boxh':'\u2500','boxH':'\u2550','boxhd':'\u252C','boxhD':'\u2565','boxHd':'\u2564','boxHD':'\u2566','boxhu':'\u2534','boxhU':'\u2568','boxHu':'\u2567','boxHU':'\u2569','boxminus':'\u229F','boxplus':'\u229E','boxtimes':'\u22A0','boxul':'\u2518','boxuL':'\u255B','boxUl':'\u255C','boxUL':'\u255D','boxur':'\u2514','boxuR':'\u2558','boxUr':'\u2559','boxUR':'\u255A','boxv':'\u2502','boxV':'\u2551','boxvh':'\u253C','boxvH':'\u256A','boxVh':'\u256B','boxVH':'\u256C','boxvl':'\u2524','boxvL':'\u2561','boxVl':'\u2562','boxVL':'\u2563','boxvr':'\u251C','boxvR':'\u255E','boxVr':'\u255F','boxVR':'\u2560','bprime':'\u2035','breve':'\u02D8','Breve':'\u02D8','brvbar':'\xA6','bscr':'\uD835\uDCB7','Bscr':'\u212C','bsemi':'\u204F','bsim':'\u223D','bsime':'\u22CD','bsol':'\\','bsolb':'\u29C5','bsolhsub':'\u27C8','bull':'\u2022','bullet':'\u2022','bump':'\u224E','bumpe':'\u224F','bumpE':'\u2AAE','bumpeq':'\u224F','Bumpeq':'\u224E','cacute':'\u0107','Cacute':'\u0106','cap':'\u2229','Cap':'\u22D2','capand':'\u2A44','capbrcup':'\u2A49','capcap':'\u2A4B','capcup':'\u2A47','capdot':'\u2A40','CapitalDifferentialD':'\u2145','caps':'\u2229\uFE00','caret':'\u2041','caron':'\u02C7','Cayleys':'\u212D','ccaps':'\u2A4D','ccaron':'\u010D','Ccaron':'\u010C','ccedil':'\xE7','Ccedil':'\xC7','ccirc':'\u0109','Ccirc':'\u0108','Cconint':'\u2230','ccups':'\u2A4C','ccupssm':'\u2A50','cdot':'\u010B','Cdot':'\u010A','cedil':'\xB8','Cedilla':'\xB8','cemptyv':'\u29B2','cent':'\xA2','centerdot':'\xB7','CenterDot':'\xB7','cfr':'\uD835\uDD20','Cfr':'\u212D','chcy':'\u0447','CHcy':'\u0427','check':'\u2713','checkmark':'\u2713','chi':'\u03C7','Chi':'\u03A7','cir':'\u25CB','circ':'\u02C6','circeq':'\u2257','circlearrowleft':'\u21BA','circlearrowright':'\u21BB','circledast':'\u229B','circledcirc':'\u229A','circleddash':'\u229D','CircleDot':'\u2299','circledR':'\xAE','circledS':'\u24C8','CircleMinus':'\u2296','CirclePlus':'\u2295','CircleTimes':'\u2297','cire':'\u2257','cirE':'\u29C3','cirfnint':'\u2A10','cirmid':'\u2AEF','cirscir':'\u29C2','ClockwiseContourIntegral':'\u2232','CloseCurlyDoubleQuote':'\u201D','CloseCurlyQuote':'\u2019','clubs':'\u2663','clubsuit':'\u2663','colon':':','Colon':'\u2237','colone':'\u2254','Colone':'\u2A74','coloneq':'\u2254','comma':',','commat':'@','comp':'\u2201','compfn':'\u2218','complement':'\u2201','complexes':'\u2102','cong':'\u2245','congdot':'\u2A6D','Congruent':'\u2261','conint':'\u222E','Conint':'\u222F','ContourIntegral':'\u222E','copf':'\uD835\uDD54','Copf':'\u2102','coprod':'\u2210','Coproduct':'\u2210','copy':'\xA9','COPY':'\xA9','copysr':'\u2117','CounterClockwiseContourIntegral':'\u2233','crarr':'\u21B5','cross':'\u2717','Cross':'\u2A2F','cscr':'\uD835\uDCB8','Cscr':'\uD835\uDC9E','csub':'\u2ACF','csube':'\u2AD1','csup':'\u2AD0','csupe':'\u2AD2','ctdot':'\u22EF','cudarrl':'\u2938','cudarrr':'\u2935','cuepr':'\u22DE','cuesc':'\u22DF','cularr':'\u21B6','cularrp':'\u293D','cup':'\u222A','Cup':'\u22D3','cupbrcap':'\u2A48','cupcap':'\u2A46','CupCap':'\u224D','cupcup':'\u2A4A','cupdot':'\u228D','cupor':'\u2A45','cups':'\u222A\uFE00','curarr':'\u21B7','curarrm':'\u293C','curlyeqprec':'\u22DE','curlyeqsucc':'\u22DF','curlyvee':'\u22CE','curlywedge':'\u22CF','curren':'\xA4','curvearrowleft':'\u21B6','curvearrowright':'\u21B7','cuvee':'\u22CE','cuwed':'\u22CF','cwconint':'\u2232','cwint':'\u2231','cylcty':'\u232D','dagger':'\u2020','Dagger':'\u2021','daleth':'\u2138','darr':'\u2193','dArr':'\u21D3','Darr':'\u21A1','dash':'\u2010','dashv':'\u22A3','Dashv':'\u2AE4','dbkarow':'\u290F','dblac':'\u02DD','dcaron':'\u010F','Dcaron':'\u010E','dcy':'\u0434','Dcy':'\u0414','dd':'\u2146','DD':'\u2145','ddagger':'\u2021','ddarr':'\u21CA','DDotrahd':'\u2911','ddotseq':'\u2A77','deg':'\xB0','Del':'\u2207','delta':'\u03B4','Delta':'\u0394','demptyv':'\u29B1','dfisht':'\u297F','dfr':'\uD835\uDD21','Dfr':'\uD835\uDD07','dHar':'\u2965','dharl':'\u21C3','dharr':'\u21C2','DiacriticalAcute':'\xB4','DiacriticalDot':'\u02D9','DiacriticalDoubleAcute':'\u02DD','DiacriticalGrave':'`','DiacriticalTilde':'\u02DC','diam':'\u22C4','diamond':'\u22C4','Diamond':'\u22C4','diamondsuit':'\u2666','diams':'\u2666','die':'\xA8','DifferentialD':'\u2146','digamma':'\u03DD','disin':'\u22F2','div':'\xF7','divide':'\xF7','divideontimes':'\u22C7','divonx':'\u22C7','djcy':'\u0452','DJcy':'\u0402','dlcorn':'\u231E','dlcrop':'\u230D','dollar':'$','dopf':'\uD835\uDD55','Dopf':'\uD835\uDD3B','dot':'\u02D9','Dot':'\xA8','DotDot':'\u20DC','doteq':'\u2250','doteqdot':'\u2251','DotEqual':'\u2250','dotminus':'\u2238','dotplus':'\u2214','dotsquare':'\u22A1','doublebarwedge':'\u2306','DoubleContourIntegral':'\u222F','DoubleDot':'\xA8','DoubleDownArrow':'\u21D3','DoubleLeftArrow':'\u21D0','DoubleLeftRightArrow':'\u21D4','DoubleLeftTee':'\u2AE4','DoubleLongLeftArrow':'\u27F8','DoubleLongLeftRightArrow':'\u27FA','DoubleLongRightArrow':'\u27F9','DoubleRightArrow':'\u21D2','DoubleRightTee':'\u22A8','DoubleUpArrow':'\u21D1','DoubleUpDownArrow':'\u21D5','DoubleVerticalBar':'\u2225','downarrow':'\u2193','Downarrow':'\u21D3','DownArrow':'\u2193','DownArrowBar':'\u2913','DownArrowUpArrow':'\u21F5','DownBreve':'\u0311','downdownarrows':'\u21CA','downharpoonleft':'\u21C3','downharpoonright':'\u21C2','DownLeftRightVector':'\u2950','DownLeftTeeVector':'\u295E','DownLeftVector':'\u21BD','DownLeftVectorBar':'\u2956','DownRightTeeVector':'\u295F','DownRightVector':'\u21C1','DownRightVectorBar':'\u2957','DownTee':'\u22A4','DownTeeArrow':'\u21A7','drbkarow':'\u2910','drcorn':'\u231F','drcrop':'\u230C','dscr':'\uD835\uDCB9','Dscr':'\uD835\uDC9F','dscy':'\u0455','DScy':'\u0405','dsol':'\u29F6','dstrok':'\u0111','Dstrok':'\u0110','dtdot':'\u22F1','dtri':'\u25BF','dtrif':'\u25BE','duarr':'\u21F5','duhar':'\u296F','dwangle':'\u29A6','dzcy':'\u045F','DZcy':'\u040F','dzigrarr':'\u27FF','eacute':'\xE9','Eacute':'\xC9','easter':'\u2A6E','ecaron':'\u011B','Ecaron':'\u011A','ecir':'\u2256','ecirc':'\xEA','Ecirc':'\xCA','ecolon':'\u2255','ecy':'\u044D','Ecy':'\u042D','eDDot':'\u2A77','edot':'\u0117','eDot':'\u2251','Edot':'\u0116','ee':'\u2147','efDot':'\u2252','efr':'\uD835\uDD22','Efr':'\uD835\uDD08','eg':'\u2A9A','egrave':'\xE8','Egrave':'\xC8','egs':'\u2A96','egsdot':'\u2A98','el':'\u2A99','Element':'\u2208','elinters':'\u23E7','ell':'\u2113','els':'\u2A95','elsdot':'\u2A97','emacr':'\u0113','Emacr':'\u0112','empty':'\u2205','emptyset':'\u2205','EmptySmallSquare':'\u25FB','emptyv':'\u2205','EmptyVerySmallSquare':'\u25AB','emsp':'\u2003','emsp13':'\u2004','emsp14':'\u2005','eng':'\u014B','ENG':'\u014A','ensp':'\u2002','eogon':'\u0119','Eogon':'\u0118','eopf':'\uD835\uDD56','Eopf':'\uD835\uDD3C','epar':'\u22D5','eparsl':'\u29E3','eplus':'\u2A71','epsi':'\u03B5','epsilon':'\u03B5','Epsilon':'\u0395','epsiv':'\u03F5','eqcirc':'\u2256','eqcolon':'\u2255','eqsim':'\u2242','eqslantgtr':'\u2A96','eqslantless':'\u2A95','Equal':'\u2A75','equals':'=','EqualTilde':'\u2242','equest':'\u225F','Equilibrium':'\u21CC','equiv':'\u2261','equivDD':'\u2A78','eqvparsl':'\u29E5','erarr':'\u2971','erDot':'\u2253','escr':'\u212F','Escr':'\u2130','esdot':'\u2250','esim':'\u2242','Esim':'\u2A73','eta':'\u03B7','Eta':'\u0397','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','euro':'\u20AC','excl':'!','exist':'\u2203','Exists':'\u2203','expectation':'\u2130','exponentiale':'\u2147','ExponentialE':'\u2147','fallingdotseq':'\u2252','fcy':'\u0444','Fcy':'\u0424','female':'\u2640','ffilig':'\uFB03','fflig':'\uFB00','ffllig':'\uFB04','ffr':'\uD835\uDD23','Ffr':'\uD835\uDD09','filig':'\uFB01','FilledSmallSquare':'\u25FC','FilledVerySmallSquare':'\u25AA','fjlig':'fj','flat':'\u266D','fllig':'\uFB02','fltns':'\u25B1','fnof':'\u0192','fopf':'\uD835\uDD57','Fopf':'\uD835\uDD3D','forall':'\u2200','ForAll':'\u2200','fork':'\u22D4','forkv':'\u2AD9','Fouriertrf':'\u2131','fpartint':'\u2A0D','frac12':'\xBD','frac13':'\u2153','frac14':'\xBC','frac15':'\u2155','frac16':'\u2159','frac18':'\u215B','frac23':'\u2154','frac25':'\u2156','frac34':'\xBE','frac35':'\u2157','frac38':'\u215C','frac45':'\u2158','frac56':'\u215A','frac58':'\u215D','frac78':'\u215E','frasl':'\u2044','frown':'\u2322','fscr':'\uD835\uDCBB','Fscr':'\u2131','gacute':'\u01F5','gamma':'\u03B3','Gamma':'\u0393','gammad':'\u03DD','Gammad':'\u03DC','gap':'\u2A86','gbreve':'\u011F','Gbreve':'\u011E','Gcedil':'\u0122','gcirc':'\u011D','Gcirc':'\u011C','gcy':'\u0433','Gcy':'\u0413','gdot':'\u0121','Gdot':'\u0120','ge':'\u2265','gE':'\u2267','gel':'\u22DB','gEl':'\u2A8C','geq':'\u2265','geqq':'\u2267','geqslant':'\u2A7E','ges':'\u2A7E','gescc':'\u2AA9','gesdot':'\u2A80','gesdoto':'\u2A82','gesdotol':'\u2A84','gesl':'\u22DB\uFE00','gesles':'\u2A94','gfr':'\uD835\uDD24','Gfr':'\uD835\uDD0A','gg':'\u226B','Gg':'\u22D9','ggg':'\u22D9','gimel':'\u2137','gjcy':'\u0453','GJcy':'\u0403','gl':'\u2277','gla':'\u2AA5','glE':'\u2A92','glj':'\u2AA4','gnap':'\u2A8A','gnapprox':'\u2A8A','gne':'\u2A88','gnE':'\u2269','gneq':'\u2A88','gneqq':'\u2269','gnsim':'\u22E7','gopf':'\uD835\uDD58','Gopf':'\uD835\uDD3E','grave':'`','GreaterEqual':'\u2265','GreaterEqualLess':'\u22DB','GreaterFullEqual':'\u2267','GreaterGreater':'\u2AA2','GreaterLess':'\u2277','GreaterSlantEqual':'\u2A7E','GreaterTilde':'\u2273','gscr':'\u210A','Gscr':'\uD835\uDCA2','gsim':'\u2273','gsime':'\u2A8E','gsiml':'\u2A90','gt':'>','Gt':'\u226B','GT':'>','gtcc':'\u2AA7','gtcir':'\u2A7A','gtdot':'\u22D7','gtlPar':'\u2995','gtquest':'\u2A7C','gtrapprox':'\u2A86','gtrarr':'\u2978','gtrdot':'\u22D7','gtreqless':'\u22DB','gtreqqless':'\u2A8C','gtrless':'\u2277','gtrsim':'\u2273','gvertneqq':'\u2269\uFE00','gvnE':'\u2269\uFE00','Hacek':'\u02C7','hairsp':'\u200A','half':'\xBD','hamilt':'\u210B','hardcy':'\u044A','HARDcy':'\u042A','harr':'\u2194','hArr':'\u21D4','harrcir':'\u2948','harrw':'\u21AD','Hat':'^','hbar':'\u210F','hcirc':'\u0125','Hcirc':'\u0124','hearts':'\u2665','heartsuit':'\u2665','hellip':'\u2026','hercon':'\u22B9','hfr':'\uD835\uDD25','Hfr':'\u210C','HilbertSpace':'\u210B','hksearow':'\u2925','hkswarow':'\u2926','hoarr':'\u21FF','homtht':'\u223B','hookleftarrow':'\u21A9','hookrightarrow':'\u21AA','hopf':'\uD835\uDD59','Hopf':'\u210D','horbar':'\u2015','HorizontalLine':'\u2500','hscr':'\uD835\uDCBD','Hscr':'\u210B','hslash':'\u210F','hstrok':'\u0127','Hstrok':'\u0126','HumpDownHump':'\u224E','HumpEqual':'\u224F','hybull':'\u2043','hyphen':'\u2010','iacute':'\xED','Iacute':'\xCD','ic':'\u2063','icirc':'\xEE','Icirc':'\xCE','icy':'\u0438','Icy':'\u0418','Idot':'\u0130','iecy':'\u0435','IEcy':'\u0415','iexcl':'\xA1','iff':'\u21D4','ifr':'\uD835\uDD26','Ifr':'\u2111','igrave':'\xEC','Igrave':'\xCC','ii':'\u2148','iiiint':'\u2A0C','iiint':'\u222D','iinfin':'\u29DC','iiota':'\u2129','ijlig':'\u0133','IJlig':'\u0132','Im':'\u2111','imacr':'\u012B','Imacr':'\u012A','image':'\u2111','ImaginaryI':'\u2148','imagline':'\u2110','imagpart':'\u2111','imath':'\u0131','imof':'\u22B7','imped':'\u01B5','Implies':'\u21D2','in':'\u2208','incare':'\u2105','infin':'\u221E','infintie':'\u29DD','inodot':'\u0131','int':'\u222B','Int':'\u222C','intcal':'\u22BA','integers':'\u2124','Integral':'\u222B','intercal':'\u22BA','Intersection':'\u22C2','intlarhk':'\u2A17','intprod':'\u2A3C','InvisibleComma':'\u2063','InvisibleTimes':'\u2062','iocy':'\u0451','IOcy':'\u0401','iogon':'\u012F','Iogon':'\u012E','iopf':'\uD835\uDD5A','Iopf':'\uD835\uDD40','iota':'\u03B9','Iota':'\u0399','iprod':'\u2A3C','iquest':'\xBF','iscr':'\uD835\uDCBE','Iscr':'\u2110','isin':'\u2208','isindot':'\u22F5','isinE':'\u22F9','isins':'\u22F4','isinsv':'\u22F3','isinv':'\u2208','it':'\u2062','itilde':'\u0129','Itilde':'\u0128','iukcy':'\u0456','Iukcy':'\u0406','iuml':'\xEF','Iuml':'\xCF','jcirc':'\u0135','Jcirc':'\u0134','jcy':'\u0439','Jcy':'\u0419','jfr':'\uD835\uDD27','Jfr':'\uD835\uDD0D','jmath':'\u0237','jopf':'\uD835\uDD5B','Jopf':'\uD835\uDD41','jscr':'\uD835\uDCBF','Jscr':'\uD835\uDCA5','jsercy':'\u0458','Jsercy':'\u0408','jukcy':'\u0454','Jukcy':'\u0404','kappa':'\u03BA','Kappa':'\u039A','kappav':'\u03F0','kcedil':'\u0137','Kcedil':'\u0136','kcy':'\u043A','Kcy':'\u041A','kfr':'\uD835\uDD28','Kfr':'\uD835\uDD0E','kgreen':'\u0138','khcy':'\u0445','KHcy':'\u0425','kjcy':'\u045C','KJcy':'\u040C','kopf':'\uD835\uDD5C','Kopf':'\uD835\uDD42','kscr':'\uD835\uDCC0','Kscr':'\uD835\uDCA6','lAarr':'\u21DA','lacute':'\u013A','Lacute':'\u0139','laemptyv':'\u29B4','lagran':'\u2112','lambda':'\u03BB','Lambda':'\u039B','lang':'\u27E8','Lang':'\u27EA','langd':'\u2991','langle':'\u27E8','lap':'\u2A85','Laplacetrf':'\u2112','laquo':'\xAB','larr':'\u2190','lArr':'\u21D0','Larr':'\u219E','larrb':'\u21E4','larrbfs':'\u291F','larrfs':'\u291D','larrhk':'\u21A9','larrlp':'\u21AB','larrpl':'\u2939','larrsim':'\u2973','larrtl':'\u21A2','lat':'\u2AAB','latail':'\u2919','lAtail':'\u291B','late':'\u2AAD','lates':'\u2AAD\uFE00','lbarr':'\u290C','lBarr':'\u290E','lbbrk':'\u2772','lbrace':'{','lbrack':'[','lbrke':'\u298B','lbrksld':'\u298F','lbrkslu':'\u298D','lcaron':'\u013E','Lcaron':'\u013D','lcedil':'\u013C','Lcedil':'\u013B','lceil':'\u2308','lcub':'{','lcy':'\u043B','Lcy':'\u041B','ldca':'\u2936','ldquo':'\u201C','ldquor':'\u201E','ldrdhar':'\u2967','ldrushar':'\u294B','ldsh':'\u21B2','le':'\u2264','lE':'\u2266','LeftAngleBracket':'\u27E8','leftarrow':'\u2190','Leftarrow':'\u21D0','LeftArrow':'\u2190','LeftArrowBar':'\u21E4','LeftArrowRightArrow':'\u21C6','leftarrowtail':'\u21A2','LeftCeiling':'\u2308','LeftDoubleBracket':'\u27E6','LeftDownTeeVector':'\u2961','LeftDownVector':'\u21C3','LeftDownVectorBar':'\u2959','LeftFloor':'\u230A','leftharpoondown':'\u21BD','leftharpoonup':'\u21BC','leftleftarrows':'\u21C7','leftrightarrow':'\u2194','Leftrightarrow':'\u21D4','LeftRightArrow':'\u2194','leftrightarrows':'\u21C6','leftrightharpoons':'\u21CB','leftrightsquigarrow':'\u21AD','LeftRightVector':'\u294E','LeftTee':'\u22A3','LeftTeeArrow':'\u21A4','LeftTeeVector':'\u295A','leftthreetimes':'\u22CB','LeftTriangle':'\u22B2','LeftTriangleBar':'\u29CF','LeftTriangleEqual':'\u22B4','LeftUpDownVector':'\u2951','LeftUpTeeVector':'\u2960','LeftUpVector':'\u21BF','LeftUpVectorBar':'\u2958','LeftVector':'\u21BC','LeftVectorBar':'\u2952','leg':'\u22DA','lEg':'\u2A8B','leq':'\u2264','leqq':'\u2266','leqslant':'\u2A7D','les':'\u2A7D','lescc':'\u2AA8','lesdot':'\u2A7F','lesdoto':'\u2A81','lesdotor':'\u2A83','lesg':'\u22DA\uFE00','lesges':'\u2A93','lessapprox':'\u2A85','lessdot':'\u22D6','lesseqgtr':'\u22DA','lesseqqgtr':'\u2A8B','LessEqualGreater':'\u22DA','LessFullEqual':'\u2266','LessGreater':'\u2276','lessgtr':'\u2276','LessLess':'\u2AA1','lesssim':'\u2272','LessSlantEqual':'\u2A7D','LessTilde':'\u2272','lfisht':'\u297C','lfloor':'\u230A','lfr':'\uD835\uDD29','Lfr':'\uD835\uDD0F','lg':'\u2276','lgE':'\u2A91','lHar':'\u2962','lhard':'\u21BD','lharu':'\u21BC','lharul':'\u296A','lhblk':'\u2584','ljcy':'\u0459','LJcy':'\u0409','ll':'\u226A','Ll':'\u22D8','llarr':'\u21C7','llcorner':'\u231E','Lleftarrow':'\u21DA','llhard':'\u296B','lltri':'\u25FA','lmidot':'\u0140','Lmidot':'\u013F','lmoust':'\u23B0','lmoustache':'\u23B0','lnap':'\u2A89','lnapprox':'\u2A89','lne':'\u2A87','lnE':'\u2268','lneq':'\u2A87','lneqq':'\u2268','lnsim':'\u22E6','loang':'\u27EC','loarr':'\u21FD','lobrk':'\u27E6','longleftarrow':'\u27F5','Longleftarrow':'\u27F8','LongLeftArrow':'\u27F5','longleftrightarrow':'\u27F7','Longleftrightarrow':'\u27FA','LongLeftRightArrow':'\u27F7','longmapsto':'\u27FC','longrightarrow':'\u27F6','Longrightarrow':'\u27F9','LongRightArrow':'\u27F6','looparrowleft':'\u21AB','looparrowright':'\u21AC','lopar':'\u2985','lopf':'\uD835\uDD5D','Lopf':'\uD835\uDD43','loplus':'\u2A2D','lotimes':'\u2A34','lowast':'\u2217','lowbar':'_','LowerLeftArrow':'\u2199','LowerRightArrow':'\u2198','loz':'\u25CA','lozenge':'\u25CA','lozf':'\u29EB','lpar':'(','lparlt':'\u2993','lrarr':'\u21C6','lrcorner':'\u231F','lrhar':'\u21CB','lrhard':'\u296D','lrm':'\u200E','lrtri':'\u22BF','lsaquo':'\u2039','lscr':'\uD835\uDCC1','Lscr':'\u2112','lsh':'\u21B0','Lsh':'\u21B0','lsim':'\u2272','lsime':'\u2A8D','lsimg':'\u2A8F','lsqb':'[','lsquo':'\u2018','lsquor':'\u201A','lstrok':'\u0142','Lstrok':'\u0141','lt':'<','Lt':'\u226A','LT':'<','ltcc':'\u2AA6','ltcir':'\u2A79','ltdot':'\u22D6','lthree':'\u22CB','ltimes':'\u22C9','ltlarr':'\u2976','ltquest':'\u2A7B','ltri':'\u25C3','ltrie':'\u22B4','ltrif':'\u25C2','ltrPar':'\u2996','lurdshar':'\u294A','luruhar':'\u2966','lvertneqq':'\u2268\uFE00','lvnE':'\u2268\uFE00','macr':'\xAF','male':'\u2642','malt':'\u2720','maltese':'\u2720','map':'\u21A6','Map':'\u2905','mapsto':'\u21A6','mapstodown':'\u21A7','mapstoleft':'\u21A4','mapstoup':'\u21A5','marker':'\u25AE','mcomma':'\u2A29','mcy':'\u043C','Mcy':'\u041C','mdash':'\u2014','mDDot':'\u223A','measuredangle':'\u2221','MediumSpace':'\u205F','Mellintrf':'\u2133','mfr':'\uD835\uDD2A','Mfr':'\uD835\uDD10','mho':'\u2127','micro':'\xB5','mid':'\u2223','midast':'*','midcir':'\u2AF0','middot':'\xB7','minus':'\u2212','minusb':'\u229F','minusd':'\u2238','minusdu':'\u2A2A','MinusPlus':'\u2213','mlcp':'\u2ADB','mldr':'\u2026','mnplus':'\u2213','models':'\u22A7','mopf':'\uD835\uDD5E','Mopf':'\uD835\uDD44','mp':'\u2213','mscr':'\uD835\uDCC2','Mscr':'\u2133','mstpos':'\u223E','mu':'\u03BC','Mu':'\u039C','multimap':'\u22B8','mumap':'\u22B8','nabla':'\u2207','nacute':'\u0144','Nacute':'\u0143','nang':'\u2220\u20D2','nap':'\u2249','napE':'\u2A70\u0338','napid':'\u224B\u0338','napos':'\u0149','napprox':'\u2249','natur':'\u266E','natural':'\u266E','naturals':'\u2115','nbsp':'\xA0','nbump':'\u224E\u0338','nbumpe':'\u224F\u0338','ncap':'\u2A43','ncaron':'\u0148','Ncaron':'\u0147','ncedil':'\u0146','Ncedil':'\u0145','ncong':'\u2247','ncongdot':'\u2A6D\u0338','ncup':'\u2A42','ncy':'\u043D','Ncy':'\u041D','ndash':'\u2013','ne':'\u2260','nearhk':'\u2924','nearr':'\u2197','neArr':'\u21D7','nearrow':'\u2197','nedot':'\u2250\u0338','NegativeMediumSpace':'\u200B','NegativeThickSpace':'\u200B','NegativeThinSpace':'\u200B','NegativeVeryThinSpace':'\u200B','nequiv':'\u2262','nesear':'\u2928','nesim':'\u2242\u0338','NestedGreaterGreater':'\u226B','NestedLessLess':'\u226A','NewLine':'\n','nexist':'\u2204','nexists':'\u2204','nfr':'\uD835\uDD2B','Nfr':'\uD835\uDD11','nge':'\u2271','ngE':'\u2267\u0338','ngeq':'\u2271','ngeqq':'\u2267\u0338','ngeqslant':'\u2A7E\u0338','nges':'\u2A7E\u0338','nGg':'\u22D9\u0338','ngsim':'\u2275','ngt':'\u226F','nGt':'\u226B\u20D2','ngtr':'\u226F','nGtv':'\u226B\u0338','nharr':'\u21AE','nhArr':'\u21CE','nhpar':'\u2AF2','ni':'\u220B','nis':'\u22FC','nisd':'\u22FA','niv':'\u220B','njcy':'\u045A','NJcy':'\u040A','nlarr':'\u219A','nlArr':'\u21CD','nldr':'\u2025','nle':'\u2270','nlE':'\u2266\u0338','nleftarrow':'\u219A','nLeftarrow':'\u21CD','nleftrightarrow':'\u21AE','nLeftrightarrow':'\u21CE','nleq':'\u2270','nleqq':'\u2266\u0338','nleqslant':'\u2A7D\u0338','nles':'\u2A7D\u0338','nless':'\u226E','nLl':'\u22D8\u0338','nlsim':'\u2274','nlt':'\u226E','nLt':'\u226A\u20D2','nltri':'\u22EA','nltrie':'\u22EC','nLtv':'\u226A\u0338','nmid':'\u2224','NoBreak':'\u2060','NonBreakingSpace':'\xA0','nopf':'\uD835\uDD5F','Nopf':'\u2115','not':'\xAC','Not':'\u2AEC','NotCongruent':'\u2262','NotCupCap':'\u226D','NotDoubleVerticalBar':'\u2226','NotElement':'\u2209','NotEqual':'\u2260','NotEqualTilde':'\u2242\u0338','NotExists':'\u2204','NotGreater':'\u226F','NotGreaterEqual':'\u2271','NotGreaterFullEqual':'\u2267\u0338','NotGreaterGreater':'\u226B\u0338','NotGreaterLess':'\u2279','NotGreaterSlantEqual':'\u2A7E\u0338','NotGreaterTilde':'\u2275','NotHumpDownHump':'\u224E\u0338','NotHumpEqual':'\u224F\u0338','notin':'\u2209','notindot':'\u22F5\u0338','notinE':'\u22F9\u0338','notinva':'\u2209','notinvb':'\u22F7','notinvc':'\u22F6','NotLeftTriangle':'\u22EA','NotLeftTriangleBar':'\u29CF\u0338','NotLeftTriangleEqual':'\u22EC','NotLess':'\u226E','NotLessEqual':'\u2270','NotLessGreater':'\u2278','NotLessLess':'\u226A\u0338','NotLessSlantEqual':'\u2A7D\u0338','NotLessTilde':'\u2274','NotNestedGreaterGreater':'\u2AA2\u0338','NotNestedLessLess':'\u2AA1\u0338','notni':'\u220C','notniva':'\u220C','notnivb':'\u22FE','notnivc':'\u22FD','NotPrecedes':'\u2280','NotPrecedesEqual':'\u2AAF\u0338','NotPrecedesSlantEqual':'\u22E0','NotReverseElement':'\u220C','NotRightTriangle':'\u22EB','NotRightTriangleBar':'\u29D0\u0338','NotRightTriangleEqual':'\u22ED','NotSquareSubset':'\u228F\u0338','NotSquareSubsetEqual':'\u22E2','NotSquareSuperset':'\u2290\u0338','NotSquareSupersetEqual':'\u22E3','NotSubset':'\u2282\u20D2','NotSubsetEqual':'\u2288','NotSucceeds':'\u2281','NotSucceedsEqual':'\u2AB0\u0338','NotSucceedsSlantEqual':'\u22E1','NotSucceedsTilde':'\u227F\u0338','NotSuperset':'\u2283\u20D2','NotSupersetEqual':'\u2289','NotTilde':'\u2241','NotTildeEqual':'\u2244','NotTildeFullEqual':'\u2247','NotTildeTilde':'\u2249','NotVerticalBar':'\u2224','npar':'\u2226','nparallel':'\u2226','nparsl':'\u2AFD\u20E5','npart':'\u2202\u0338','npolint':'\u2A14','npr':'\u2280','nprcue':'\u22E0','npre':'\u2AAF\u0338','nprec':'\u2280','npreceq':'\u2AAF\u0338','nrarr':'\u219B','nrArr':'\u21CF','nrarrc':'\u2933\u0338','nrarrw':'\u219D\u0338','nrightarrow':'\u219B','nRightarrow':'\u21CF','nrtri':'\u22EB','nrtrie':'\u22ED','nsc':'\u2281','nsccue':'\u22E1','nsce':'\u2AB0\u0338','nscr':'\uD835\uDCC3','Nscr':'\uD835\uDCA9','nshortmid':'\u2224','nshortparallel':'\u2226','nsim':'\u2241','nsime':'\u2244','nsimeq':'\u2244','nsmid':'\u2224','nspar':'\u2226','nsqsube':'\u22E2','nsqsupe':'\u22E3','nsub':'\u2284','nsube':'\u2288','nsubE':'\u2AC5\u0338','nsubset':'\u2282\u20D2','nsubseteq':'\u2288','nsubseteqq':'\u2AC5\u0338','nsucc':'\u2281','nsucceq':'\u2AB0\u0338','nsup':'\u2285','nsupe':'\u2289','nsupE':'\u2AC6\u0338','nsupset':'\u2283\u20D2','nsupseteq':'\u2289','nsupseteqq':'\u2AC6\u0338','ntgl':'\u2279','ntilde':'\xF1','Ntilde':'\xD1','ntlg':'\u2278','ntriangleleft':'\u22EA','ntrianglelefteq':'\u22EC','ntriangleright':'\u22EB','ntrianglerighteq':'\u22ED','nu':'\u03BD','Nu':'\u039D','num':'#','numero':'\u2116','numsp':'\u2007','nvap':'\u224D\u20D2','nvdash':'\u22AC','nvDash':'\u22AD','nVdash':'\u22AE','nVDash':'\u22AF','nvge':'\u2265\u20D2','nvgt':'>\u20D2','nvHarr':'\u2904','nvinfin':'\u29DE','nvlArr':'\u2902','nvle':'\u2264\u20D2','nvlt':'<\u20D2','nvltrie':'\u22B4\u20D2','nvrArr':'\u2903','nvrtrie':'\u22B5\u20D2','nvsim':'\u223C\u20D2','nwarhk':'\u2923','nwarr':'\u2196','nwArr':'\u21D6','nwarrow':'\u2196','nwnear':'\u2927','oacute':'\xF3','Oacute':'\xD3','oast':'\u229B','ocir':'\u229A','ocirc':'\xF4','Ocirc':'\xD4','ocy':'\u043E','Ocy':'\u041E','odash':'\u229D','odblac':'\u0151','Odblac':'\u0150','odiv':'\u2A38','odot':'\u2299','odsold':'\u29BC','oelig':'\u0153','OElig':'\u0152','ofcir':'\u29BF','ofr':'\uD835\uDD2C','Ofr':'\uD835\uDD12','ogon':'\u02DB','ograve':'\xF2','Ograve':'\xD2','ogt':'\u29C1','ohbar':'\u29B5','ohm':'\u03A9','oint':'\u222E','olarr':'\u21BA','olcir':'\u29BE','olcross':'\u29BB','oline':'\u203E','olt':'\u29C0','omacr':'\u014D','Omacr':'\u014C','omega':'\u03C9','Omega':'\u03A9','omicron':'\u03BF','Omicron':'\u039F','omid':'\u29B6','ominus':'\u2296','oopf':'\uD835\uDD60','Oopf':'\uD835\uDD46','opar':'\u29B7','OpenCurlyDoubleQuote':'\u201C','OpenCurlyQuote':'\u2018','operp':'\u29B9','oplus':'\u2295','or':'\u2228','Or':'\u2A54','orarr':'\u21BB','ord':'\u2A5D','order':'\u2134','orderof':'\u2134','ordf':'\xAA','ordm':'\xBA','origof':'\u22B6','oror':'\u2A56','orslope':'\u2A57','orv':'\u2A5B','oS':'\u24C8','oscr':'\u2134','Oscr':'\uD835\uDCAA','oslash':'\xF8','Oslash':'\xD8','osol':'\u2298','otilde':'\xF5','Otilde':'\xD5','otimes':'\u2297','Otimes':'\u2A37','otimesas':'\u2A36','ouml':'\xF6','Ouml':'\xD6','ovbar':'\u233D','OverBar':'\u203E','OverBrace':'\u23DE','OverBracket':'\u23B4','OverParenthesis':'\u23DC','par':'\u2225','para':'\xB6','parallel':'\u2225','parsim':'\u2AF3','parsl':'\u2AFD','part':'\u2202','PartialD':'\u2202','pcy':'\u043F','Pcy':'\u041F','percnt':'%','period':'.','permil':'\u2030','perp':'\u22A5','pertenk':'\u2031','pfr':'\uD835\uDD2D','Pfr':'\uD835\uDD13','phi':'\u03C6','Phi':'\u03A6','phiv':'\u03D5','phmmat':'\u2133','phone':'\u260E','pi':'\u03C0','Pi':'\u03A0','pitchfork':'\u22D4','piv':'\u03D6','planck':'\u210F','planckh':'\u210E','plankv':'\u210F','plus':'+','plusacir':'\u2A23','plusb':'\u229E','pluscir':'\u2A22','plusdo':'\u2214','plusdu':'\u2A25','pluse':'\u2A72','PlusMinus':'\xB1','plusmn':'\xB1','plussim':'\u2A26','plustwo':'\u2A27','pm':'\xB1','Poincareplane':'\u210C','pointint':'\u2A15','popf':'\uD835\uDD61','Popf':'\u2119','pound':'\xA3','pr':'\u227A','Pr':'\u2ABB','prap':'\u2AB7','prcue':'\u227C','pre':'\u2AAF','prE':'\u2AB3','prec':'\u227A','precapprox':'\u2AB7','preccurlyeq':'\u227C','Precedes':'\u227A','PrecedesEqual':'\u2AAF','PrecedesSlantEqual':'\u227C','PrecedesTilde':'\u227E','preceq':'\u2AAF','precnapprox':'\u2AB9','precneqq':'\u2AB5','precnsim':'\u22E8','precsim':'\u227E','prime':'\u2032','Prime':'\u2033','primes':'\u2119','prnap':'\u2AB9','prnE':'\u2AB5','prnsim':'\u22E8','prod':'\u220F','Product':'\u220F','profalar':'\u232E','profline':'\u2312','profsurf':'\u2313','prop':'\u221D','Proportion':'\u2237','Proportional':'\u221D','propto':'\u221D','prsim':'\u227E','prurel':'\u22B0','pscr':'\uD835\uDCC5','Pscr':'\uD835\uDCAB','psi':'\u03C8','Psi':'\u03A8','puncsp':'\u2008','qfr':'\uD835\uDD2E','Qfr':'\uD835\uDD14','qint':'\u2A0C','qopf':'\uD835\uDD62','Qopf':'\u211A','qprime':'\u2057','qscr':'\uD835\uDCC6','Qscr':'\uD835\uDCAC','quaternions':'\u210D','quatint':'\u2A16','quest':'?','questeq':'\u225F','quot':'"','QUOT':'"','rAarr':'\u21DB','race':'\u223D\u0331','racute':'\u0155','Racute':'\u0154','radic':'\u221A','raemptyv':'\u29B3','rang':'\u27E9','Rang':'\u27EB','rangd':'\u2992','range':'\u29A5','rangle':'\u27E9','raquo':'\xBB','rarr':'\u2192','rArr':'\u21D2','Rarr':'\u21A0','rarrap':'\u2975','rarrb':'\u21E5','rarrbfs':'\u2920','rarrc':'\u2933','rarrfs':'\u291E','rarrhk':'\u21AA','rarrlp':'\u21AC','rarrpl':'\u2945','rarrsim':'\u2974','rarrtl':'\u21A3','Rarrtl':'\u2916','rarrw':'\u219D','ratail':'\u291A','rAtail':'\u291C','ratio':'\u2236','rationals':'\u211A','rbarr':'\u290D','rBarr':'\u290F','RBarr':'\u2910','rbbrk':'\u2773','rbrace':'}','rbrack':']','rbrke':'\u298C','rbrksld':'\u298E','rbrkslu':'\u2990','rcaron':'\u0159','Rcaron':'\u0158','rcedil':'\u0157','Rcedil':'\u0156','rceil':'\u2309','rcub':'}','rcy':'\u0440','Rcy':'\u0420','rdca':'\u2937','rdldhar':'\u2969','rdquo':'\u201D','rdquor':'\u201D','rdsh':'\u21B3','Re':'\u211C','real':'\u211C','realine':'\u211B','realpart':'\u211C','reals':'\u211D','rect':'\u25AD','reg':'\xAE','REG':'\xAE','ReverseElement':'\u220B','ReverseEquilibrium':'\u21CB','ReverseUpEquilibrium':'\u296F','rfisht':'\u297D','rfloor':'\u230B','rfr':'\uD835\uDD2F','Rfr':'\u211C','rHar':'\u2964','rhard':'\u21C1','rharu':'\u21C0','rharul':'\u296C','rho':'\u03C1','Rho':'\u03A1','rhov':'\u03F1','RightAngleBracket':'\u27E9','rightarrow':'\u2192','Rightarrow':'\u21D2','RightArrow':'\u2192','RightArrowBar':'\u21E5','RightArrowLeftArrow':'\u21C4','rightarrowtail':'\u21A3','RightCeiling':'\u2309','RightDoubleBracket':'\u27E7','RightDownTeeVector':'\u295D','RightDownVector':'\u21C2','RightDownVectorBar':'\u2955','RightFloor':'\u230B','rightharpoondown':'\u21C1','rightharpoonup':'\u21C0','rightleftarrows':'\u21C4','rightleftharpoons':'\u21CC','rightrightarrows':'\u21C9','rightsquigarrow':'\u219D','RightTee':'\u22A2','RightTeeArrow':'\u21A6','RightTeeVector':'\u295B','rightthreetimes':'\u22CC','RightTriangle':'\u22B3','RightTriangleBar':'\u29D0','RightTriangleEqual':'\u22B5','RightUpDownVector':'\u294F','RightUpTeeVector':'\u295C','RightUpVector':'\u21BE','RightUpVectorBar':'\u2954','RightVector':'\u21C0','RightVectorBar':'\u2953','ring':'\u02DA','risingdotseq':'\u2253','rlarr':'\u21C4','rlhar':'\u21CC','rlm':'\u200F','rmoust':'\u23B1','rmoustache':'\u23B1','rnmid':'\u2AEE','roang':'\u27ED','roarr':'\u21FE','robrk':'\u27E7','ropar':'\u2986','ropf':'\uD835\uDD63','Ropf':'\u211D','roplus':'\u2A2E','rotimes':'\u2A35','RoundImplies':'\u2970','rpar':')','rpargt':'\u2994','rppolint':'\u2A12','rrarr':'\u21C9','Rrightarrow':'\u21DB','rsaquo':'\u203A','rscr':'\uD835\uDCC7','Rscr':'\u211B','rsh':'\u21B1','Rsh':'\u21B1','rsqb':']','rsquo':'\u2019','rsquor':'\u2019','rthree':'\u22CC','rtimes':'\u22CA','rtri':'\u25B9','rtrie':'\u22B5','rtrif':'\u25B8','rtriltri':'\u29CE','RuleDelayed':'\u29F4','ruluhar':'\u2968','rx':'\u211E','sacute':'\u015B','Sacute':'\u015A','sbquo':'\u201A','sc':'\u227B','Sc':'\u2ABC','scap':'\u2AB8','scaron':'\u0161','Scaron':'\u0160','sccue':'\u227D','sce':'\u2AB0','scE':'\u2AB4','scedil':'\u015F','Scedil':'\u015E','scirc':'\u015D','Scirc':'\u015C','scnap':'\u2ABA','scnE':'\u2AB6','scnsim':'\u22E9','scpolint':'\u2A13','scsim':'\u227F','scy':'\u0441','Scy':'\u0421','sdot':'\u22C5','sdotb':'\u22A1','sdote':'\u2A66','searhk':'\u2925','searr':'\u2198','seArr':'\u21D8','searrow':'\u2198','sect':'\xA7','semi':';','seswar':'\u2929','setminus':'\u2216','setmn':'\u2216','sext':'\u2736','sfr':'\uD835\uDD30','Sfr':'\uD835\uDD16','sfrown':'\u2322','sharp':'\u266F','shchcy':'\u0449','SHCHcy':'\u0429','shcy':'\u0448','SHcy':'\u0428','ShortDownArrow':'\u2193','ShortLeftArrow':'\u2190','shortmid':'\u2223','shortparallel':'\u2225','ShortRightArrow':'\u2192','ShortUpArrow':'\u2191','shy':'\xAD','sigma':'\u03C3','Sigma':'\u03A3','sigmaf':'\u03C2','sigmav':'\u03C2','sim':'\u223C','simdot':'\u2A6A','sime':'\u2243','simeq':'\u2243','simg':'\u2A9E','simgE':'\u2AA0','siml':'\u2A9D','simlE':'\u2A9F','simne':'\u2246','simplus':'\u2A24','simrarr':'\u2972','slarr':'\u2190','SmallCircle':'\u2218','smallsetminus':'\u2216','smashp':'\u2A33','smeparsl':'\u29E4','smid':'\u2223','smile':'\u2323','smt':'\u2AAA','smte':'\u2AAC','smtes':'\u2AAC\uFE00','softcy':'\u044C','SOFTcy':'\u042C','sol':'/','solb':'\u29C4','solbar':'\u233F','sopf':'\uD835\uDD64','Sopf':'\uD835\uDD4A','spades':'\u2660','spadesuit':'\u2660','spar':'\u2225','sqcap':'\u2293','sqcaps':'\u2293\uFE00','sqcup':'\u2294','sqcups':'\u2294\uFE00','Sqrt':'\u221A','sqsub':'\u228F','sqsube':'\u2291','sqsubset':'\u228F','sqsubseteq':'\u2291','sqsup':'\u2290','sqsupe':'\u2292','sqsupset':'\u2290','sqsupseteq':'\u2292','squ':'\u25A1','square':'\u25A1','Square':'\u25A1','SquareIntersection':'\u2293','SquareSubset':'\u228F','SquareSubsetEqual':'\u2291','SquareSuperset':'\u2290','SquareSupersetEqual':'\u2292','SquareUnion':'\u2294','squarf':'\u25AA','squf':'\u25AA','srarr':'\u2192','sscr':'\uD835\uDCC8','Sscr':'\uD835\uDCAE','ssetmn':'\u2216','ssmile':'\u2323','sstarf':'\u22C6','star':'\u2606','Star':'\u22C6','starf':'\u2605','straightepsilon':'\u03F5','straightphi':'\u03D5','strns':'\xAF','sub':'\u2282','Sub':'\u22D0','subdot':'\u2ABD','sube':'\u2286','subE':'\u2AC5','subedot':'\u2AC3','submult':'\u2AC1','subne':'\u228A','subnE':'\u2ACB','subplus':'\u2ABF','subrarr':'\u2979','subset':'\u2282','Subset':'\u22D0','subseteq':'\u2286','subseteqq':'\u2AC5','SubsetEqual':'\u2286','subsetneq':'\u228A','subsetneqq':'\u2ACB','subsim':'\u2AC7','subsub':'\u2AD5','subsup':'\u2AD3','succ':'\u227B','succapprox':'\u2AB8','succcurlyeq':'\u227D','Succeeds':'\u227B','SucceedsEqual':'\u2AB0','SucceedsSlantEqual':'\u227D','SucceedsTilde':'\u227F','succeq':'\u2AB0','succnapprox':'\u2ABA','succneqq':'\u2AB6','succnsim':'\u22E9','succsim':'\u227F','SuchThat':'\u220B','sum':'\u2211','Sum':'\u2211','sung':'\u266A','sup':'\u2283','Sup':'\u22D1','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','supdot':'\u2ABE','supdsub':'\u2AD8','supe':'\u2287','supE':'\u2AC6','supedot':'\u2AC4','Superset':'\u2283','SupersetEqual':'\u2287','suphsol':'\u27C9','suphsub':'\u2AD7','suplarr':'\u297B','supmult':'\u2AC2','supne':'\u228B','supnE':'\u2ACC','supplus':'\u2AC0','supset':'\u2283','Supset':'\u22D1','supseteq':'\u2287','supseteqq':'\u2AC6','supsetneq':'\u228B','supsetneqq':'\u2ACC','supsim':'\u2AC8','supsub':'\u2AD4','supsup':'\u2AD6','swarhk':'\u2926','swarr':'\u2199','swArr':'\u21D9','swarrow':'\u2199','swnwar':'\u292A','szlig':'\xDF','Tab':'\t','target':'\u2316','tau':'\u03C4','Tau':'\u03A4','tbrk':'\u23B4','tcaron':'\u0165','Tcaron':'\u0164','tcedil':'\u0163','Tcedil':'\u0162','tcy':'\u0442','Tcy':'\u0422','tdot':'\u20DB','telrec':'\u2315','tfr':'\uD835\uDD31','Tfr':'\uD835\uDD17','there4':'\u2234','therefore':'\u2234','Therefore':'\u2234','theta':'\u03B8','Theta':'\u0398','thetasym':'\u03D1','thetav':'\u03D1','thickapprox':'\u2248','thicksim':'\u223C','ThickSpace':'\u205F\u200A','thinsp':'\u2009','ThinSpace':'\u2009','thkap':'\u2248','thksim':'\u223C','thorn':'\xFE','THORN':'\xDE','tilde':'\u02DC','Tilde':'\u223C','TildeEqual':'\u2243','TildeFullEqual':'\u2245','TildeTilde':'\u2248','times':'\xD7','timesb':'\u22A0','timesbar':'\u2A31','timesd':'\u2A30','tint':'\u222D','toea':'\u2928','top':'\u22A4','topbot':'\u2336','topcir':'\u2AF1','topf':'\uD835\uDD65','Topf':'\uD835\uDD4B','topfork':'\u2ADA','tosa':'\u2929','tprime':'\u2034','trade':'\u2122','TRADE':'\u2122','triangle':'\u25B5','triangledown':'\u25BF','triangleleft':'\u25C3','trianglelefteq':'\u22B4','triangleq':'\u225C','triangleright':'\u25B9','trianglerighteq':'\u22B5','tridot':'\u25EC','trie':'\u225C','triminus':'\u2A3A','TripleDot':'\u20DB','triplus':'\u2A39','trisb':'\u29CD','tritime':'\u2A3B','trpezium':'\u23E2','tscr':'\uD835\uDCC9','Tscr':'\uD835\uDCAF','tscy':'\u0446','TScy':'\u0426','tshcy':'\u045B','TSHcy':'\u040B','tstrok':'\u0167','Tstrok':'\u0166','twixt':'\u226C','twoheadleftarrow':'\u219E','twoheadrightarrow':'\u21A0','uacute':'\xFA','Uacute':'\xDA','uarr':'\u2191','uArr':'\u21D1','Uarr':'\u219F','Uarrocir':'\u2949','ubrcy':'\u045E','Ubrcy':'\u040E','ubreve':'\u016D','Ubreve':'\u016C','ucirc':'\xFB','Ucirc':'\xDB','ucy':'\u0443','Ucy':'\u0423','udarr':'\u21C5','udblac':'\u0171','Udblac':'\u0170','udhar':'\u296E','ufisht':'\u297E','ufr':'\uD835\uDD32','Ufr':'\uD835\uDD18','ugrave':'\xF9','Ugrave':'\xD9','uHar':'\u2963','uharl':'\u21BF','uharr':'\u21BE','uhblk':'\u2580','ulcorn':'\u231C','ulcorner':'\u231C','ulcrop':'\u230F','ultri':'\u25F8','umacr':'\u016B','Umacr':'\u016A','uml':'\xA8','UnderBar':'_','UnderBrace':'\u23DF','UnderBracket':'\u23B5','UnderParenthesis':'\u23DD','Union':'\u22C3','UnionPlus':'\u228E','uogon':'\u0173','Uogon':'\u0172','uopf':'\uD835\uDD66','Uopf':'\uD835\uDD4C','uparrow':'\u2191','Uparrow':'\u21D1','UpArrow':'\u2191','UpArrowBar':'\u2912','UpArrowDownArrow':'\u21C5','updownarrow':'\u2195','Updownarrow':'\u21D5','UpDownArrow':'\u2195','UpEquilibrium':'\u296E','upharpoonleft':'\u21BF','upharpoonright':'\u21BE','uplus':'\u228E','UpperLeftArrow':'\u2196','UpperRightArrow':'\u2197','upsi':'\u03C5','Upsi':'\u03D2','upsih':'\u03D2','upsilon':'\u03C5','Upsilon':'\u03A5','UpTee':'\u22A5','UpTeeArrow':'\u21A5','upuparrows':'\u21C8','urcorn':'\u231D','urcorner':'\u231D','urcrop':'\u230E','uring':'\u016F','Uring':'\u016E','urtri':'\u25F9','uscr':'\uD835\uDCCA','Uscr':'\uD835\uDCB0','utdot':'\u22F0','utilde':'\u0169','Utilde':'\u0168','utri':'\u25B5','utrif':'\u25B4','uuarr':'\u21C8','uuml':'\xFC','Uuml':'\xDC','uwangle':'\u29A7','vangrt':'\u299C','varepsilon':'\u03F5','varkappa':'\u03F0','varnothing':'\u2205','varphi':'\u03D5','varpi':'\u03D6','varpropto':'\u221D','varr':'\u2195','vArr':'\u21D5','varrho':'\u03F1','varsigma':'\u03C2','varsubsetneq':'\u228A\uFE00','varsubsetneqq':'\u2ACB\uFE00','varsupsetneq':'\u228B\uFE00','varsupsetneqq':'\u2ACC\uFE00','vartheta':'\u03D1','vartriangleleft':'\u22B2','vartriangleright':'\u22B3','vBar':'\u2AE8','Vbar':'\u2AEB','vBarv':'\u2AE9','vcy':'\u0432','Vcy':'\u0412','vdash':'\u22A2','vDash':'\u22A8','Vdash':'\u22A9','VDash':'\u22AB','Vdashl':'\u2AE6','vee':'\u2228','Vee':'\u22C1','veebar':'\u22BB','veeeq':'\u225A','vellip':'\u22EE','verbar':'|','Verbar':'\u2016','vert':'|','Vert':'\u2016','VerticalBar':'\u2223','VerticalLine':'|','VerticalSeparator':'\u2758','VerticalTilde':'\u2240','VeryThinSpace':'\u200A','vfr':'\uD835\uDD33','Vfr':'\uD835\uDD19','vltri':'\u22B2','vnsub':'\u2282\u20D2','vnsup':'\u2283\u20D2','vopf':'\uD835\uDD67','Vopf':'\uD835\uDD4D','vprop':'\u221D','vrtri':'\u22B3','vscr':'\uD835\uDCCB','Vscr':'\uD835\uDCB1','vsubne':'\u228A\uFE00','vsubnE':'\u2ACB\uFE00','vsupne':'\u228B\uFE00','vsupnE':'\u2ACC\uFE00','Vvdash':'\u22AA','vzigzag':'\u299A','wcirc':'\u0175','Wcirc':'\u0174','wedbar':'\u2A5F','wedge':'\u2227','Wedge':'\u22C0','wedgeq':'\u2259','weierp':'\u2118','wfr':'\uD835\uDD34','Wfr':'\uD835\uDD1A','wopf':'\uD835\uDD68','Wopf':'\uD835\uDD4E','wp':'\u2118','wr':'\u2240','wreath':'\u2240','wscr':'\uD835\uDCCC','Wscr':'\uD835\uDCB2','xcap':'\u22C2','xcirc':'\u25EF','xcup':'\u22C3','xdtri':'\u25BD','xfr':'\uD835\uDD35','Xfr':'\uD835\uDD1B','xharr':'\u27F7','xhArr':'\u27FA','xi':'\u03BE','Xi':'\u039E','xlarr':'\u27F5','xlArr':'\u27F8','xmap':'\u27FC','xnis':'\u22FB','xodot':'\u2A00','xopf':'\uD835\uDD69','Xopf':'\uD835\uDD4F','xoplus':'\u2A01','xotime':'\u2A02','xrarr':'\u27F6','xrArr':'\u27F9','xscr':'\uD835\uDCCD','Xscr':'\uD835\uDCB3','xsqcup':'\u2A06','xuplus':'\u2A04','xutri':'\u25B3','xvee':'\u22C1','xwedge':'\u22C0','yacute':'\xFD','Yacute':'\xDD','yacy':'\u044F','YAcy':'\u042F','ycirc':'\u0177','Ycirc':'\u0176','ycy':'\u044B','Ycy':'\u042B','yen':'\xA5','yfr':'\uD835\uDD36','Yfr':'\uD835\uDD1C','yicy':'\u0457','YIcy':'\u0407','yopf':'\uD835\uDD6A','Yopf':'\uD835\uDD50','yscr':'\uD835\uDCCE','Yscr':'\uD835\uDCB4','yucy':'\u044E','YUcy':'\u042E','yuml':'\xFF','Yuml':'\u0178','zacute':'\u017A','Zacute':'\u0179','zcaron':'\u017E','Zcaron':'\u017D','zcy':'\u0437','Zcy':'\u0417','zdot':'\u017C','Zdot':'\u017B','zeetrf':'\u2128','ZeroWidthSpace':'\u200B','zeta':'\u03B6','Zeta':'\u0396','zfr':'\uD835\uDD37','Zfr':'\u2128','zhcy':'\u0436','ZHcy':'\u0416','zigrarr':'\u21DD','zopf':'\uD835\uDD6B','Zopf':'\u2124','zscr':'\uD835\uDCCF','Zscr':'\uD835\uDCB5','zwj':'\u200D','zwnj':'\u200C'};
-	var decodeMapLegacy = {'aacute':'\xE1','Aacute':'\xC1','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','aelig':'\xE6','AElig':'\xC6','agrave':'\xE0','Agrave':'\xC0','amp':'&','AMP':'&','aring':'\xE5','Aring':'\xC5','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','brvbar':'\xA6','ccedil':'\xE7','Ccedil':'\xC7','cedil':'\xB8','cent':'\xA2','copy':'\xA9','COPY':'\xA9','curren':'\xA4','deg':'\xB0','divide':'\xF7','eacute':'\xE9','Eacute':'\xC9','ecirc':'\xEA','Ecirc':'\xCA','egrave':'\xE8','Egrave':'\xC8','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','frac12':'\xBD','frac14':'\xBC','frac34':'\xBE','gt':'>','GT':'>','iacute':'\xED','Iacute':'\xCD','icirc':'\xEE','Icirc':'\xCE','iexcl':'\xA1','igrave':'\xEC','Igrave':'\xCC','iquest':'\xBF','iuml':'\xEF','Iuml':'\xCF','laquo':'\xAB','lt':'<','LT':'<','macr':'\xAF','micro':'\xB5','middot':'\xB7','nbsp':'\xA0','not':'\xAC','ntilde':'\xF1','Ntilde':'\xD1','oacute':'\xF3','Oacute':'\xD3','ocirc':'\xF4','Ocirc':'\xD4','ograve':'\xF2','Ograve':'\xD2','ordf':'\xAA','ordm':'\xBA','oslash':'\xF8','Oslash':'\xD8','otilde':'\xF5','Otilde':'\xD5','ouml':'\xF6','Ouml':'\xD6','para':'\xB6','plusmn':'\xB1','pound':'\xA3','quot':'"','QUOT':'"','raquo':'\xBB','reg':'\xAE','REG':'\xAE','sect':'\xA7','shy':'\xAD','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','szlig':'\xDF','thorn':'\xFE','THORN':'\xDE','times':'\xD7','uacute':'\xFA','Uacute':'\xDA','ucirc':'\xFB','Ucirc':'\xDB','ugrave':'\xF9','Ugrave':'\xD9','uml':'\xA8','uuml':'\xFC','Uuml':'\xDC','yacute':'\xFD','Yacute':'\xDD','yen':'\xA5','yuml':'\xFF'};
-	var decodeMapNumeric = {'0':'\uFFFD','128':'\u20AC','130':'\u201A','131':'\u0192','132':'\u201E','133':'\u2026','134':'\u2020','135':'\u2021','136':'\u02C6','137':'\u2030','138':'\u0160','139':'\u2039','140':'\u0152','142':'\u017D','145':'\u2018','146':'\u2019','147':'\u201C','148':'\u201D','149':'\u2022','150':'\u2013','151':'\u2014','152':'\u02DC','153':'\u2122','154':'\u0161','155':'\u203A','156':'\u0153','158':'\u017E','159':'\u0178'};
-	var invalidReferenceCodePoints = [1,2,3,4,5,6,7,8,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,64976,64977,64978,64979,64980,64981,64982,64983,64984,64985,64986,64987,64988,64989,64990,64991,64992,64993,64994,64995,64996,64997,64998,64999,65000,65001,65002,65003,65004,65005,65006,65007,65534,65535,131070,131071,196606,196607,262142,262143,327678,327679,393214,393215,458750,458751,524286,524287,589822,589823,655358,655359,720894,720895,786430,786431,851966,851967,917502,917503,983038,983039,1048574,1048575,1114110,1114111];
-
-	/*--------------------------------------------------------------------------*/
-
-	var stringFromCharCode = String.fromCharCode;
-
-	var object = {};
-	var hasOwnProperty = object.hasOwnProperty;
-	var has = function(object, propertyName) {
-		return hasOwnProperty.call(object, propertyName);
-	};
-
-	var contains = function(array, value) {
-		var index = -1;
-		var length = array.length;
-		while (++index < length) {
-			if (array[index] == value) {
-				return true;
-			}
-		}
-		return false;
-	};
-
-	var merge = function(options, defaults) {
-		if (!options) {
-			return defaults;
-		}
-		var result = {};
-		var key;
-		for (key in defaults) {
-			// A `hasOwnProperty` check is not needed here, since only recognized
-			// option names are used anyway. Any others are ignored.
-			result[key] = has(options, key) ? options[key] : defaults[key];
-		}
-		return result;
-	};
-
-	// Modified version of `ucs2encode`; see https://mths.be/punycode.
-	var codePointToSymbol = function(codePoint, strict) {
-		var output = '';
-		if ((codePoint >= 0xD800 && codePoint <= 0xDFFF) || codePoint > 0x10FFFF) {
-			// See issue #4:
-			// “Otherwise, if the number is in the range 0xD800 to 0xDFFF or is
-			// greater than 0x10FFFF, then this is a parse error. Return a U+FFFD
-			// REPLACEMENT CHARACTER.”
-			if (strict) {
-				parseError('character reference outside the permissible Unicode range');
-			}
-			return '\uFFFD';
-		}
-		if (has(decodeMapNumeric, codePoint)) {
-			if (strict) {
-				parseError('disallowed character reference');
-			}
-			return decodeMapNumeric[codePoint];
-		}
-		if (strict && contains(invalidReferenceCodePoints, codePoint)) {
-			parseError('disallowed character reference');
-		}
-		if (codePoint > 0xFFFF) {
-			codePoint -= 0x10000;
-			output += stringFromCharCode(codePoint >>> 10 & 0x3FF | 0xD800);
-			codePoint = 0xDC00 | codePoint & 0x3FF;
-		}
-		output += stringFromCharCode(codePoint);
-		return output;
-	};
-
-	var hexEscape = function(codePoint) {
-		return '&#x' + codePoint.toString(16).toUpperCase() + ';';
-	};
-
-	var decEscape = function(codePoint) {
-		return '&#' + codePoint + ';';
-	};
-
-	var parseError = function(message) {
-		throw Error('Parse error: ' + message);
-	};
-
-	/*--------------------------------------------------------------------------*/
-
-	var encode = function(string, options) {
-		options = merge(options, encode.options);
-		var strict = options.strict;
-		if (strict && regexInvalidRawCodePoint.test(string)) {
-			parseError('forbidden code point');
-		}
-		var encodeEverything = options.encodeEverything;
-		var useNamedReferences = options.useNamedReferences;
-		var allowUnsafeSymbols = options.allowUnsafeSymbols;
-		var escapeCodePoint = options.decimal ? decEscape : hexEscape;
-
-		var escapeBmpSymbol = function(symbol) {
-			return escapeCodePoint(symbol.charCodeAt(0));
-		};
-
-		if (encodeEverything) {
-			// Encode ASCII symbols.
-			string = string.replace(regexAsciiWhitelist, function(symbol) {
-				// Use named references if requested & possible.
-				if (useNamedReferences && has(encodeMap, symbol)) {
-					return '&' + encodeMap[symbol] + ';';
-				}
-				return escapeBmpSymbol(symbol);
-			});
-			// Shorten a few escapes that represent two symbols, of which at least one
-			// is within the ASCII range.
-			if (useNamedReferences) {
-				string = string
-					.replace(/&gt;\u20D2/g, '&nvgt;')
-					.replace(/&lt;\u20D2/g, '&nvlt;')
-					.replace(/&#x66;&#x6A;/g, '&fjlig;');
-			}
-			// Encode non-ASCII symbols.
-			if (useNamedReferences) {
-				// Encode non-ASCII symbols that can be replaced with a named reference.
-				string = string.replace(regexEncodeNonAscii, function(string) {
-					// Note: there is no need to check `has(encodeMap, string)` here.
-					return '&' + encodeMap[string] + ';';
-				});
-			}
-			// Note: any remaining non-ASCII symbols are handled outside of the `if`.
-		} else if (useNamedReferences) {
-			// Apply named character references.
-			// Encode `<>"'&` using named character references.
-			if (!allowUnsafeSymbols) {
-				string = string.replace(regexEscape, function(string) {
-					return '&' + encodeMap[string] + ';'; // no need to check `has()` here
-				});
-			}
-			// Shorten escapes that represent two symbols, of which at least one is
-			// `<>"'&`.
-			string = string
-				.replace(/&gt;\u20D2/g, '&nvgt;')
-				.replace(/&lt;\u20D2/g, '&nvlt;');
-			// Encode non-ASCII symbols that can be replaced with a named reference.
-			string = string.replace(regexEncodeNonAscii, function(string) {
-				// Note: there is no need to check `has(encodeMap, string)` here.
-				return '&' + encodeMap[string] + ';';
-			});
-		} else if (!allowUnsafeSymbols) {
-			// Encode `<>"'&` using hexadecimal escapes, now that they’re not handled
-			// using named character references.
-			string = string.replace(regexEscape, escapeBmpSymbol);
-		}
-		return string
-			// Encode astral symbols.
-			.replace(regexAstralSymbols, function($0) {
-				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-				var high = $0.charCodeAt(0);
-				var low = $0.charCodeAt(1);
-				var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
-				return escapeCodePoint(codePoint);
-			})
-			// Encode any remaining BMP symbols that are not printable ASCII symbols
-			// using a hexadecimal escape.
-			.replace(regexBmpWhitelist, escapeBmpSymbol);
-	};
-	// Expose default options (so they can be overridden globally).
-	encode.options = {
-		'allowUnsafeSymbols': false,
-		'encodeEverything': false,
-		'strict': false,
-		'useNamedReferences': false,
-		'decimal' : false
-	};
-
-	var decode = function(html, options) {
-		options = merge(options, decode.options);
-		var strict = options.strict;
-		if (strict && regexInvalidEntity.test(html)) {
-			parseError('malformed character reference');
-		}
-		return html.replace(regexDecode, function($0, $1, $2, $3, $4, $5, $6, $7) {
-			var codePoint;
-			var semicolon;
-			var decDigits;
-			var hexDigits;
-			var reference;
-			var next;
-			if ($1) {
-				// Decode decimal escapes, e.g. `&#119558;`.
-				decDigits = $1;
-				semicolon = $2;
-				if (strict && !semicolon) {
-					parseError('character reference was not terminated by a semicolon');
-				}
-				codePoint = parseInt(decDigits, 10);
-				return codePointToSymbol(codePoint, strict);
-			}
-			if ($3) {
-				// Decode hexadecimal escapes, e.g. `&#x1D306;`.
-				hexDigits = $3;
-				semicolon = $4;
-				if (strict && !semicolon) {
-					parseError('character reference was not terminated by a semicolon');
-				}
-				codePoint = parseInt(hexDigits, 16);
-				return codePointToSymbol(codePoint, strict);
-			}
-			if ($5) {
-				// Decode named character references with trailing `;`, e.g. `&copy;`.
-				reference = $5;
-				if (has(decodeMap, reference)) {
-					return decodeMap[reference];
-				} else {
-					// Ambiguous ampersand. https://mths.be/notes/ambiguous-ampersands
-					if (strict) {
-						parseError(
-							'named character reference was not terminated by a semicolon'
-						);
-					}
-					return $0;
-				}
-			}
-			// If we’re still here, it’s a legacy reference for sure. No need for an
-			// extra `if` check.
-			// Decode named character references without trailing `;`, e.g. `&amp`
-			// This is only a parse error if it gets converted to `&`, or if it is
-			// followed by `=` in an attribute context.
-			reference = $6;
-			next = $7;
-			if (next && options.isAttributeValue) {
-				if (strict && next == '=') {
-					parseError('`&` did not start a character reference');
-				}
-				return $0;
-			} else {
-				if (strict) {
-					parseError(
-						'named character reference was not terminated by a semicolon'
-					);
-				}
-				// Note: there is no need to check `has(decodeMapLegacy, reference)`.
-				return decodeMapLegacy[reference] + (next || '');
-			}
-		});
-	};
-	// Expose default options (so they can be overridden globally).
-	decode.options = {
-		'isAttributeValue': false,
-		'strict': false
-	};
-
-	var escape = function(string) {
-		return string.replace(regexEscape, function($0) {
-			// Note: there is no need to check `has(escapeMap, $0)` here.
-			return escapeMap[$0];
-		});
-	};
-
-	/*--------------------------------------------------------------------------*/
-
-	var he = {
-		'version': '1.1.1',
-		'encode': encode,
-		'decode': decode,
-		'escape': escape,
-		'unescape': decode
-	};
-
-	// Some AMD build optimizers, like r.js, check for specific condition patterns
-	// like the following:
-	if (
-		typeof undefined == 'function' &&
-		typeof undefined.amd == 'object' &&
-		undefined.amd
-	) {
-		undefined(function() {
-			return he;
-		});
-	}	else if (freeExports && !freeExports.nodeType) {
-		if (freeModule) { // in Node.js, io.js, or RingoJS v0.8.0+
-			freeModule.exports = he;
-		} else { // in Narwhal or RingoJS v0.7.0-
-			for (var key in he) {
-				has(he, key) && (freeExports[key] = he[key]);
-			}
-		}
-	} else { // in Rhino or a web browser
-		root.he = he;
-	}
-
-}(commonjsGlobal));
-});
-
-/*  */
-
-/**
- * Cross-platform code generation for component v-model
- */
-function genComponentModel (
-  el,
-  value,
-  modifiers
-) {
-  var ref = modifiers || {};
-  var number = ref.number;
-  var trim = ref.trim;
-
-  var baseValueExpression = '$$v';
-  var valueExpression = baseValueExpression;
-  if (trim) {
-    valueExpression =
-      "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
-  }
-  var assignment = genAssignmentCode(value, valueExpression);
+  var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
+  var isBooleanAttr = makeMap(
+    'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
+    'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
+    'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
+    'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
+    'required,reversed,scoped,seamless,selected,sortable,' +
+    'truespeed,typemustmatch,visible'
+  );
+
+  /*  */
+
+  /*  */
+
+  var isHTMLTag = makeMap(
+    'html,body,base,head,link,meta,style,title,' +
+    'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
+    'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' +
+    'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' +
+    's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' +
+    'embed,object,param,source,canvas,script,noscript,del,ins,' +
+    'caption,col,colgroup,table,thead,tbody,td,th,tr,' +
+    'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' +
+    'output,progress,select,textarea,' +
+    'details,dialog,menu,menuitem,summary,' +
+    'content,element,shadow,template,blockquote,iframe,tfoot'
+  );
+
+  // this map is intentionally selective, only covering SVG elements that may
+  // contain child elements.
+  var isSVG = makeMap(
+    'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
+    'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+    'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
+    true
+  );
+
+  var isPreTag = function (tag) { return tag === 'pre'; };
 
-  el.model = {
-    value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
-    callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+  var isReservedTag = function (tag) {
+    return isHTMLTag(tag) || isSVG(tag)
   };
-}
-
-/**
- * Cross-platform codegen helper for generating v-model value assignment code.
- */
-function genAssignmentCode (
-  value,
-  assignment
-) {
-  var res = parseModel(value);
-  if (res.key === null) {
-    return (value + "=" + assignment)
-  } else {
-    return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
-  }
-}
-
-/**
- * Parse a v-model expression into a base path and a final key segment.
- * Handles both dot-path and possible square brackets.
- *
- * Possible cases:
- *
- * - test
- * - test[key]
- * - test[test1[key]]
- * - test["a"][key]
- * - xxx.test[a[a].test1[key]]
- * - test.xxx.a["asa"][test1[key]]
- *
- */
-
-var len;
-var str;
-var chr;
-var index;
-var expressionPos;
-var expressionEndPos;
-
-
-
-function parseModel (val) {
-  len = val.length;
-
-  if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
-    index = val.lastIndexOf('.');
-    if (index > -1) {
-      return {
-        exp: val.slice(0, index),
-        key: '"' + val.slice(index + 1) + '"'
-      }
-    } else {
-      return {
-        exp: val,
-        key: null
-      }
-    }
-  }
 
-  str = val;
-  index = expressionPos = expressionEndPos = 0;
-
-  while (!eof()) {
-    chr = next();
-    /* istanbul ignore if */
-    if (isStringStart(chr)) {
-      parseString(chr);
-    } else if (chr === 0x5B) {
-      parseBracket(chr);
-    }
-  }
-
-  return {
-    exp: val.slice(0, expressionPos),
-    key: val.slice(expressionPos + 1, expressionEndPos)
-  }
-}
-
-function next () {
-  return str.charCodeAt(++index)
-}
-
-function eof () {
-  return index >= len
-}
-
-function isStringStart (chr) {
-  return chr === 0x22 || chr === 0x27
-}
-
-function parseBracket (chr) {
-  var inBracket = 1;
-  expressionPos = index;
-  while (!eof()) {
-    chr = next();
-    if (isStringStart(chr)) {
-      parseString(chr);
-      continue
+  function getTagNamespace (tag) {
+    if (isSVG(tag)) {
+      return 'svg'
     }
-    if (chr === 0x5B) { inBracket++; }
-    if (chr === 0x5D) { inBracket--; }
-    if (inBracket === 0) {
-      expressionEndPos = index;
-      break
+    // basic support for MathML
+    // note it doesn't support other MathML elements being component roots
+    if (tag === 'math') {
+      return 'math'
     }
   }
-}
 
-function parseString (chr) {
-  var stringQuote = chr;
-  while (!eof()) {
-    chr = next();
-    if (chr === stringQuote) {
-      break
+  var isTextInputType = makeMap('text,number,password,search,email,tel,url');
+
+  /*  */
+
+  /*  */
+
+  var validDivisionCharRE = /[\w).+\-_$\]]/;
+
+  function parseFilters (exp) {
+    var inSingle = false;
+    var inDouble = false;
+    var inTemplateString = false;
+    var inRegex = false;
+    var curly = 0;
+    var square = 0;
+    var paren = 0;
+    var lastFilterIndex = 0;
+    var c, prev, i, expression, filters;
+
+    for (i = 0; i < exp.length; i++) {
+      prev = c;
+      c = exp.charCodeAt(i);
+      if (inSingle) {
+        if (c === 0x27 && prev !== 0x5C) { inSingle = false; }
+      } else if (inDouble) {
+        if (c === 0x22 && prev !== 0x5C) { inDouble = false; }
+      } else if (inTemplateString) {
+        if (c === 0x60 && prev !== 0x5C) { inTemplateString = false; }
+      } else if (inRegex) {
+        if (c === 0x2f && prev !== 0x5C) { inRegex = false; }
+      } else if (
+        c === 0x7C && // pipe
+        exp.charCodeAt(i + 1) !== 0x7C &&
+        exp.charCodeAt(i - 1) !== 0x7C &&
+        !curly && !square && !paren
+      ) {
+        if (expression === undefined) {
+          // first filter, end of expression
+          lastFilterIndex = i + 1;
+          expression = exp.slice(0, i).trim();
+        } else {
+          pushFilter();
+        }
+      } else {
+        switch (c) {
+          case 0x22: inDouble = true; break         // "
+          case 0x27: inSingle = true; break         // '
+          case 0x60: inTemplateString = true; break // `
+          case 0x28: paren++; break                 // (
+          case 0x29: paren--; break                 // )
+          case 0x5B: square++; break                // [
+          case 0x5D: square--; break                // ]
+          case 0x7B: curly++; break                 // {
+          case 0x7D: curly--; break                 // }
+        }
+        if (c === 0x2f) { // /
+          var j = i - 1;
+          var p = (void 0);
+          // find first non-whitespace prev char
+          for (; j >= 0; j--) {
+            p = exp.charAt(j);
+            if (p !== ' ') { break }
+          }
+          if (!p || !validDivisionCharRE.test(p)) {
+            inRegex = true;
+          }
+        }
+      }
     }
-  }
-}
-
-/*  */
 
-var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
-var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
-var stripParensRE = /^\(|\)$/g;
-
-var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
-
-var decodeHTMLCached = cached(he.decode);
-
-// configurable state
-var warn$1;
-var delimiters;
-var transforms;
-var preTransforms;
-var postTransforms;
-var platformIsPreTag;
-var platformMustUseProp;
-var platformGetTagNamespace;
-
-
-
-function createASTElement (
-  tag,
-  attrs,
-  parent
-) {
-  return {
-    type: 1,
-    tag: tag,
-    attrsList: attrs,
-    attrsMap: makeAttrsMap(attrs),
-    parent: parent,
-    children: []
-  }
-}
-
-/**
- * Convert HTML string to AST.
- */
-function parse (
-  template,
-  options
-) {
-  warn$1 = options.warn || baseWarn;
+    if (expression === undefined) {
+      expression = exp.slice(0, i).trim();
+    } else if (lastFilterIndex !== 0) {
+      pushFilter();
+    }
 
-  platformIsPreTag = options.isPreTag || no;
-  platformMustUseProp = options.mustUseProp || no;
-  platformGetTagNamespace = options.getTagNamespace || no;
-
-  transforms = pluckModuleFunction(options.modules, 'transformNode');
-  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
-  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
-
-  delimiters = options.delimiters;
-
-  var stack = [];
-  var preserveWhitespace = options.preserveWhitespace !== false;
-  var root;
-  var currentParent;
-  var inVPre = false;
-  var inPre = false;
-  var warned = false;
-
-  function warnOnce (msg) {
-    if (!warned) {
-      warned = true;
-      warn$1(msg);
-    }
-  }
-
-  function closeElement (element) {
-    // check pre state
-    if (element.pre) {
-      inVPre = false;
-    }
-    if (platformIsPreTag(element.tag)) {
-      inPre = false;
-    }
-    // apply post-transforms
-    for (var i = 0; i < postTransforms.length; i++) {
-      postTransforms[i](element, options);
+    function pushFilter () {
+      (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
+      lastFilterIndex = i + 1;
     }
-  }
-
-  parseHTML(template, {
-    warn: warn$1,
-    expectHTML: options.expectHTML,
-    isUnaryTag: options.isUnaryTag,
-    canBeLeftOpenTag: options.canBeLeftOpenTag,
-    shouldDecodeNewlines: options.shouldDecodeNewlines,
-    shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
-    shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
-      // check namespace.
-      // inherit parent ns if there is one
-      var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
-
-      // handle IE svg bug
-      /* istanbul ignore if */
-      if (isIE && ns === 'svg') {
-        attrs = guardIESVGBug(attrs);
-      }
 
-      var element = createASTElement(tag, attrs, currentParent);
-      if (ns) {
-        element.ns = ns;
+    if (filters) {
+      for (i = 0; i < filters.length; i++) {
+        expression = wrapFilter(expression, filters[i]);
       }
+    }
 
-      if (isForbiddenTag(element) && !isServerRendering()) {
-        element.forbidden = true;
-        "development" !== 'production' && warn$1(
-          'Templates should only be responsible for mapping the state to the ' +
-          'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
-        );
-      }
+    return expression
+  }
 
-      // apply pre-transforms
-      for (var i = 0; i < preTransforms.length; i++) {
-        element = preTransforms[i](element, options) || element;
-      }
+  function wrapFilter (exp, filter) {
+    var i = filter.indexOf('(');
+    if (i < 0) {
+      // _f: resolveFilter
+      return ("_f(\"" + filter + "\")(" + exp + ")")
+    } else {
+      var name = filter.slice(0, i);
+      var args = filter.slice(i + 1);
+      return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
+    }
+  }
 
-      if (!inVPre) {
-        processPre(element);
-        if (element.pre) {
-          inVPre = true;
-        }
-      }
-      if (platformIsPreTag(element.tag)) {
-        inPre = true;
-      }
-      if (inVPre) {
-        processRawAttrs(element);
-      } else if (!element.processed) {
-        // structural directives
-        processFor(element);
-        processIf(element);
-        processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
+  /*  */
 
-      function checkRootConstraints (el) {
-        {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
-      }
+  var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
+  var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
-      // tree management
-      if (!root) {
-        root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
-        }
-      }
-      if (!unary) {
-        currentParent = element;
-        stack.push(element);
-      } else {
-        closeElement(element);
-      }
-    },
+  var buildRegex = cached(function (delimiters) {
+    var open = delimiters[0].replace(regexEscapeRE, '\\$&');
+    var close = delimiters[1].replace(regexEscapeRE, '\\$&');
+    return new RegExp(open + '((?:.|\\n)+?)' + close, 'g')
+  });
 
-    end: function end () {
-      // remove trailing whitespace
-      var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
-      // pop stack
-      stack.length -= 1;
-      currentParent = stack[stack.length - 1];
-      closeElement(element);
-    },
 
-    chars: function chars (text) {
-      if (!currentParent) {
-        {
-          if (text === template) {
-            warnOnce(
-              'Component template requires a root element, rather than just text.'
-            );
-          } else if ((text = text.trim())) {
-            warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
-            );
-          }
-        }
-        return
-      }
-      // IE textarea placeholder bug
-      /* istanbul ignore if */
-      if (isIE &&
-        currentParent.tag === 'textarea' &&
-        currentParent.attrsMap.placeholder === text
-      ) {
-        return
-      }
-      var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
-      if (text) {
-        var res;
-        if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
-            type: 2,
-            expression: res.expression,
-            tokens: res.tokens,
-            text: text
-          });
-        } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
-            type: 3,
-            text: text
-          });
-        }
+
+  function parseText (
+    text,
+    delimiters
+  ) {
+    var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;
+    if (!tagRE.test(text)) {
+      return
+    }
+    var tokens = [];
+    var rawTokens = [];
+    var lastIndex = tagRE.lastIndex = 0;
+    var match, index, tokenValue;
+    while ((match = tagRE.exec(text))) {
+      index = match.index;
+      // push text token
+      if (index > lastIndex) {
+        rawTokens.push(tokenValue = text.slice(lastIndex, index));
+        tokens.push(JSON.stringify(tokenValue));
       }
-    },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
+      // tag token
+      var exp = parseFilters(match[1].trim());
+      tokens.push(("_s(" + exp + ")"));
+      rawTokens.push({ '@binding': exp });
+      lastIndex = index + match[0].length;
     }
-  });
-  return root
-}
-
-function processPre (el) {
-  if (getAndRemoveAttr(el, 'v-pre') != null) {
-    el.pre = true;
-  }
-}
-
-function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
-      attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
-      };
+    if (lastIndex < text.length) {
+      rawTokens.push(tokenValue = text.slice(lastIndex));
+      tokens.push(JSON.stringify(tokenValue));
+    }
+    return {
+      expression: tokens.join('+'),
+      tokens: rawTokens
     }
-  } else if (!el.pre) {
-    // non root node in pre blocks with no attributes
-    el.plain = true;
   }
-}
 
-function processElement (element, options) {
-  processKey(element);
+  /*  */
+
 
-  // determine whether this is a plain element after
-  // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
 
-  processRef(element);
-  processSlot(element);
-  processComponent(element);
-  for (var i = 0; i < transforms.length; i++) {
-    element = transforms[i](element, options) || element;
+  /* eslint-disable no-unused-vars */
+  function baseWarn (msg, range) {
+    console.error(("[Vue compiler]: " + msg));
   }
-  processAttrs(element);
-}
+  /* eslint-enable no-unused-vars */
 
-function processKey (el) {
-  var exp = getBindingAttr(el, 'key');
-  if (exp) {
-    if ("development" !== 'production' && el.tag === 'template') {
-      warn$1("<template> cannot be keyed. Place the key on real elements instead.");
-    }
-    el.key = exp;
+  function pluckModuleFunction (
+    modules,
+    key
+  ) {
+    return modules
+      ? modules.map(function (m) { return m[key]; }).filter(function (_) { return _; })
+      : []
   }
-}
 
-function processRef (el) {
-  var ref = getBindingAttr(el, 'ref');
-  if (ref) {
-    el.ref = ref;
-    el.refInFor = checkInFor(el);
+  function addProp (el, name, value, range, dynamic) {
+    (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
   }
-}
 
-function processFor (el) {
-  var exp;
-  if ((exp = getAndRemoveAttr(el, 'v-for'))) {
-    var res = parseFor(exp);
-    if (res) {
-      extend(el, res);
-    } else {
-      warn$1(
-        ("Invalid v-for expression: " + exp)
+  function addAttr (el, name, value, range, dynamic) {
+    var attrs = dynamic
+      ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+      : (el.attrs || (el.attrs = []));
+    attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
+    el.plain = false;
+  }
+
+  // add a raw attr (use this in preTransforms)
+  function addRawAttr (el, name, value, range) {
+    el.attrsMap[name] = value;
+    el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
+  }
+
+  function addDirective (
+    el,
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers,
+    range
+  ) {
+    (el.directives || (el.directives = [])).push(rangeSetItem({
+      name: name,
+      rawName: rawName,
+      value: value,
+      arg: arg,
+      isDynamicArg: isDynamicArg,
+      modifiers: modifiers
+    }, range));
+    el.plain = false;
+  }
+
+  function prependModifierMarker (symbol, name, dynamic) {
+    return dynamic
+      ? ("_p(" + name + ",\"" + symbol + "\")")
+      : symbol + name // mark the event as captured
+  }
+
+  function addHandler (
+    el,
+    name,
+    value,
+    modifiers,
+    important,
+    warn,
+    range,
+    dynamic
+  ) {
+    modifiers = modifiers || emptyObject;
+    // warn prevent and passive modifier
+    /* istanbul ignore if */
+    if (
+      warn &&
+      modifiers.prevent && modifiers.passive
+    ) {
+      warn(
+        'passive and prevent can\'t be used together. ' +
+        'Passive handler can\'t prevent default event.',
+        range
       );
     }
-  }
-}
 
-function parseFor (exp) {
-  var inMatch = exp.match(forAliasRE);
-  if (!inMatch) { return }
-  var res = {};
-  res.for = inMatch[2].trim();
-  var alias = inMatch[1].trim().replace(stripParensRE, '');
-  var iteratorMatch = alias.match(forIteratorRE);
-  if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
-    res.iterator1 = iteratorMatch[1].trim();
-    if (iteratorMatch[2]) {
-      res.iterator2 = iteratorMatch[2].trim();
+    // normalize click.right and click.middle since they don't actually fire
+    // this is technically browser-specific, but at least for now browsers are
+    // the only target envs that have right/middle clicks.
+    if (modifiers.right) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'contextmenu';
+        delete modifiers.right;
+      }
+    } else if (modifiers.middle) {
+      if (dynamic) {
+        name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+      } else if (name === 'click') {
+        name = 'mouseup';
+      }
     }
-  } else {
-    res.alias = alias;
-  }
-  return res
-}
-
-function processIf (el) {
-  var exp = getAndRemoveAttr(el, 'v-if');
-  if (exp) {
-    el.if = exp;
-    addIfCondition(el, {
-      exp: exp,
-      block: el
-    });
-  } else {
-    if (getAndRemoveAttr(el, 'v-else') != null) {
-      el.else = true;
+
+    // check capture modifier
+    if (modifiers.capture) {
+      delete modifiers.capture;
+      name = prependModifierMarker('!', name, dynamic);
+    }
+    if (modifiers.once) {
+      delete modifiers.once;
+      name = prependModifierMarker('~', name, dynamic);
+    }
+    /* istanbul ignore if */
+    if (modifiers.passive) {
+      delete modifiers.passive;
+      name = prependModifierMarker('&', name, dynamic);
+    }
+
+    var events;
+    if (modifiers.native) {
+      delete modifiers.native;
+      events = el.nativeEvents || (el.nativeEvents = {});
+    } else {
+      events = el.events || (el.events = {});
+    }
+
+    var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
+    if (modifiers !== emptyObject) {
+      newHandler.modifiers = modifiers;
     }
-    var elseif = getAndRemoveAttr(el, 'v-else-if');
-    if (elseif) {
-      el.elseif = elseif;
+
+    var handlers = events[name];
+    /* istanbul ignore if */
+    if (Array.isArray(handlers)) {
+      important ? handlers.unshift(newHandler) : handlers.push(newHandler);
+    } else if (handlers) {
+      events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
+    } else {
+      events[name] = newHandler;
     }
+
+    el.plain = false;
   }
-}
 
-function processIfConditions (el, parent) {
-  var prev = findPrevElement(parent.children);
-  if (prev && prev.if) {
-    addIfCondition(prev, {
-      exp: el.elseif,
-      block: el
-    });
-  } else {
-    warn$1(
-      "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
-    );
+  function getRawBindingAttr (
+    el,
+    name
+  ) {
+    return el.rawAttrsMap[':' + name] ||
+      el.rawAttrsMap['v-bind:' + name] ||
+      el.rawAttrsMap[name]
   }
-}
 
-function findPrevElement (children) {
-  var i = children.length;
-  while (i--) {
-    if (children[i].type === 1) {
-      return children[i]
-    } else {
-      if ("development" !== 'production' && children[i].text !== ' ') {
-        warn$1(
-          "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
-        );
+  function getBindingAttr (
+    el,
+    name,
+    getStatic
+  ) {
+    var dynamicValue =
+      getAndRemoveAttr(el, ':' + name) ||
+      getAndRemoveAttr(el, 'v-bind:' + name);
+    if (dynamicValue != null) {
+      return parseFilters(dynamicValue)
+    } else if (getStatic !== false) {
+      var staticValue = getAndRemoveAttr(el, name);
+      if (staticValue != null) {
+        return JSON.stringify(staticValue)
       }
-      children.pop();
     }
   }
-}
 
-function addIfCondition (el, condition) {
-  if (!el.ifConditions) {
-    el.ifConditions = [];
+  // note: this only removes the attr from the Array (attrsList) so that it
+  // doesn't get processed by processAttrs.
+  // By default it does NOT remove it from the map (attrsMap) because the map is
+  // needed during codegen.
+  function getAndRemoveAttr (
+    el,
+    name,
+    removeFromMap
+  ) {
+    var val;
+    if ((val = el.attrsMap[name]) != null) {
+      var list = el.attrsList;
+      for (var i = 0, l = list.length; i < l; i++) {
+        if (list[i].name === name) {
+          list.splice(i, 1);
+          break
+        }
+      }
+    }
+    if (removeFromMap) {
+      delete el.attrsMap[name];
+    }
+    return val
   }
-  el.ifConditions.push(condition);
-}
 
-function processOnce (el) {
-  var once$$1 = getAndRemoveAttr(el, 'v-once');
-  if (once$$1 != null) {
-    el.once = true;
+  function getAndRemoveAttrByRegex (
+    el,
+    name
+  ) {
+    var list = el.attrsList;
+    for (var i = 0, l = list.length; i < l; i++) {
+      var attr = list[i];
+      if (name.test(attr.name)) {
+        list.splice(i, 1);
+        return attr
+      }
+    }
   }
-}
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name');
-    if ("development" !== 'production' && el.key) {
-      warn$1(
-        "`key` does not work on <slot> because slots are abstract outlets " +
-        "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
-      );
-    }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if ("development" !== 'production' && slotScope) {
-        warn$1(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
+  function rangeSetItem (
+    item,
+    range
+  ) {
+    if (range) {
+      if (range.start != null) {
+        item.start = range.start;
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if ("development" !== 'production' && el.attrsMap['v-for']) {
-        warn$1(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
+      if (range.end != null) {
+        item.end = range.end;
       }
-      el.slotScope = slotScope;
     }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
+    return item
+  }
+
+  /*  */
+
+  function transformNode (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticClass = getAndRemoveAttr(el, 'class');
+    if (staticClass) {
+      var res = parseText(staticClass, options.delimiters);
+      if (res) {
+        warn(
+          "class=\"" + staticClass + "\": " +
+          'Interpolation inside attributes has been removed. ' +
+          'Use v-bind or the colon shorthand instead. For example, ' +
+          'instead of <div class="{{ val }}">, use <div :class="val">.',
+          el.rawAttrsMap['class']
+        );
       }
     }
+    if (staticClass) {
+      el.staticClass = JSON.stringify(staticClass);
+    }
+    var classBinding = getBindingAttr(el, 'class', false /* getStatic */);
+    if (classBinding) {
+      el.classBinding = classBinding;
+    }
   }
-}
 
-function processComponent (el) {
-  var binding;
-  if ((binding = getBindingAttr(el, 'is'))) {
-    el.component = binding;
-  }
-  if (getAndRemoveAttr(el, 'inline-template') != null) {
-    el.inlineTemplate = true;
+  function genData (el) {
+    var data = '';
+    if (el.staticClass) {
+      data += "staticClass:" + (el.staticClass) + ",";
+    }
+    if (el.classBinding) {
+      data += "class:" + (el.classBinding) + ",";
+    }
+    return data
   }
-}
 
-function processAttrs (el) {
-  var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
-  for (i = 0, l = list.length; i < l; i++) {
-    name = rawName = list[i].name;
-    value = list[i].value;
-    if (dirRE.test(name)) {
-      // mark element as dynamic
-      el.hasBindings = true;
-      // modifiers
-      modifiers = parseModifiers(name);
-      if (modifiers) {
-        name = name.replace(modifierRE, '');
-      }
-      if (bindRE.test(name)) { // v-bind
-        name = name.replace(bindRE, '');
-        value = parseFilters(value);
-        isProp = false;
-        if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
-            name = camelize(name);
-            if (name === 'innerHtml') { name = 'innerHTML'; }
-          }
-          if (modifiers.camel) {
-            name = camelize(name);
-          }
-          if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
-          }
-        }
-        if (isProp || (
-          !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
-        )) {
-          addProp(el, name, value);
-        } else {
-          addAttr(el, name, value);
-        }
-      } else if (onRE.test(name)) { // v-on
-        name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$1);
-      } else { // normal directives
-        name = name.replace(dirRE, '');
-        // parse arg
-        var argMatch = name.match(argRE);
-        var arg = argMatch && argMatch[1];
-        if (arg) {
-          name = name.slice(0, -(arg.length + 1));
-        }
-        addDirective(el, name, rawName, value, arg, modifiers);
-        if ("development" !== 'production' && name === 'model') {
-          checkForAliasModel(el, value);
-        }
+  var klass = {
+    staticKeys: ['staticClass'],
+    transformNode: transformNode,
+    genData: genData
+  };
+
+  /*  */
+
+  var parseStyleText = cached(function (cssText) {
+    var res = {};
+    var listDelimiter = /;(?![^(]*\))/g;
+    var propertyDelimiter = /:(.+)/;
+    cssText.split(listDelimiter).forEach(function (item) {
+      if (item) {
+        var tmp = item.split(propertyDelimiter);
+        tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
       }
-    } else {
-      // literal attribute
+    });
+    return res
+  });
+
+  /*  */
+
+  function transformNode$1 (el, options) {
+    var warn = options.warn || baseWarn;
+    var staticStyle = getAndRemoveAttr(el, 'style');
+    if (staticStyle) {
+      /* istanbul ignore if */
       {
-        var res = parseText(value, delimiters);
+        var res = parseText(staticStyle, options.delimiters);
         if (res) {
-          warn$1(
-            name + "=\"" + value + "\": " +
+          warn(
+            "style=\"" + staticStyle + "\": " +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div style="{{ val }}">, use <div :style="val">.',
+            el.rawAttrsMap['style']
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
-      // #6887 firefox doesn't update muted state if set via attribute
-      // even immediately after element creation
-      if (!el.component &&
-          name === 'muted' &&
-          platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
-      }
+      el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
+    }
+
+    var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
+    if (styleBinding) {
+      el.styleBinding = styleBinding;
     }
   }
-}
 
-function checkInFor (el) {
-  var parent = el;
-  while (parent) {
-    if (parent.for !== undefined) {
-      return true
+  function genData$1 (el) {
+    var data = '';
+    if (el.staticStyle) {
+      data += "staticStyle:" + (el.staticStyle) + ",";
     }
-    parent = parent.parent;
+    if (el.styleBinding) {
+      data += "style:(" + (el.styleBinding) + "),";
+    }
+    return data
   }
-  return false
-}
 
-function parseModifiers (name) {
-  var match = name.match(modifierRE);
-  if (match) {
-    var ret = {};
-    match.forEach(function (m) { ret[m.slice(1)] = true; });
-    return ret
+  var style = {
+    staticKeys: ['staticStyle'],
+    transformNode: transformNode$1,
+    genData: genData$1
+  };
+
+  var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+  function createCommonjsModule(fn, module) {
+  	return module = { exports: {} }, fn(module, module.exports), module.exports;
+  }
+
+  var he = createCommonjsModule(function (module, exports) {
+  (function(root) {
+
+  	// Detect free variables `exports`.
+  	var freeExports = exports;
+
+  	// Detect free variable `module`.
+  	var freeModule = module &&
+  		module.exports == freeExports && module;
+
+  	// Detect free variable `global`, from Node.js or Browserified code,
+  	// and use it as `root`.
+  	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
+  	if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
+  		root = freeGlobal;
+  	}
+
+  	/*--------------------------------------------------------------------------*/
+
+  	// All astral symbols.
+  	var regexAstralSymbols = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g;
+  	// All ASCII symbols (not just printable ASCII) except those listed in the
+  	// first column of the overrides table.
+  	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides
+  	var regexAsciiWhitelist = /[\x01-\x7F]/g;
+  	// All BMP symbols that are not ASCII newlines, printable ASCII symbols, or
+  	// code points listed in the first column of the overrides table on
+  	// https://html.spec.whatwg.org/multipage/syntax.html#table-charref-overrides.
+  	var regexBmpWhitelist = /[\x01-\t\x0B\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g;
+
+  	var regexEncodeNonAscii = /<\u20D2|=\u20E5|>\u20D2|\u205F\u200A|\u219D\u0338|\u2202\u0338|\u2220\u20D2|\u2229\uFE00|\u222A\uFE00|\u223C\u20D2|\u223D\u0331|\u223E\u0333|\u2242\u0338|\u224B\u0338|\u224D\u20D2|\u224E\u0338|\u224F\u0338|\u2250\u0338|\u2261\u20E5|\u2264\u20D2|\u2265\u20D2|\u2266\u0338|\u2267\u0338|\u2268\uFE00|\u2269\uFE00|\u226A\u0338|\u226A\u20D2|\u226B\u0338|\u226B\u20D2|\u227F\u0338|\u2282\u20D2|\u2283\u20D2|\u228A\uFE00|\u228B\uFE00|\u228F\u0338|\u2290\u0338|\u2293\uFE00|\u2294\uFE00|\u22B4\u20D2|\u22B5\u20D2|\u22D8\u0338|\u22D9\u0338|\u22DA\uFE00|\u22DB\uFE00|\u22F5\u0338|\u22F9\u0338|\u2933\u0338|\u29CF\u0338|\u29D0\u0338|\u2A6D\u0338|\u2A70\u0338|\u2A7D\u0338|\u2A7E\u0338|\u2AA1\u0338|\u2AA2\u0338|\u2AAC\uFE00|\u2AAD\uFE00|\u2AAF\u0338|\u2AB0\u0338|\u2AC5\u0338|\u2AC6\u0338|\u2ACB\uFE00|\u2ACC\uFE00|\u2AFD\u20E5|[\xA0-\u0113\u0116-\u0122\u0124-\u012B\u012E-\u014D\u0150-\u017E\u0192\u01B5\u01F5\u0237\u02C6\u02C7\u02D8-\u02DD\u0311\u0391-\u03A1\u03A3-\u03A9\u03B1-\u03C9\u03D1\u03D2\u03D5\u03D6\u03DC\u03DD\u03F0\u03F1\u03F5\u03F6\u0401-\u040C\u040E-\u044F\u0451-\u045C\u045E\u045F\u2002-\u2005\u2007-\u2010\u2013-\u2016\u2018-\u201A\u201C-\u201E\u2020-\u2022\u2025\u2026\u2030-\u2035\u2039\u203A\u203E\u2041\u2043\u2044\u204F\u2057\u205F-\u2063\u20AC\u20DB\u20DC\u2102\u2105\u210A-\u2113\u2115-\u211E\u2122\u2124\u2127-\u2129\u212C\u212D\u212F-\u2131\u2133-\u2138\u2145-\u2148\u2153-\u215E\u2190-\u219B\u219D-\u21A7\u21A9-\u21AE\u21B0-\u21B3\u21B5-\u21B7\u21BA-\u21DB\u21DD\u21E4\u21E5\u21F5\u21FD-\u2205\u2207-\u2209\u220B\u220C\u220F-\u2214\u2216-\u2218\u221A\u221D-\u2238\u223A-\u2257\u2259\u225A\u225C\u225F-\u2262\u2264-\u228B\u228D-\u229B\u229D-\u22A5\u22A7-\u22B0\u22B2-\u22BB\u22BD-\u22DB\u22DE-\u22E3\u22E6-\u22F7\u22F9-\u22FE\u2305\u2306\u2308-\u2310\u2312\u2313\u2315\u2316\u231C-\u231F\u2322\u2323\u232D\u232E\u2336\u233D\u233F\u237C\u23B0\u23B1\u23B4-\u23B6\u23DC-\u23DF\u23E2\u23E7\u2423\u24C8\u2500\u2502\u250C\u2510\u2514\u2518\u251C\u2524\u252C\u2534\u253C\u2550-\u256C\u2580\u2584\u2588\u2591-\u2593\u25A1\u25AA\u25AB\u25AD\u25AE\u25B1\u25B3-\u25B5\u25B8\u25B9\u25BD-\u25BF\u25C2\u25C3\u25CA\u25CB\u25EC\u25EF\u25F8-\u25FC\u2605\u2606\u260E\u2640\u2642\u2660\u2663\u2665\u2666\u266A\u266D-\u266F\u2713\u2717\u2720\u2736\u2758\u2772\u2773\u27C8\u27C9\u27E6-\u27ED\u27F5-\u27FA\u27FC\u27FF\u2902-\u2905\u290C-\u2913\u2916\u2919-\u2920\u2923-\u292A\u2933\u2935-\u2939\u293C\u293D\u2945\u2948-\u294B\u294E-\u2976\u2978\u2979\u297B-\u297F\u2985\u2986\u298B-\u2996\u299A\u299C\u299D\u29A4-\u29B7\u29B9\u29BB\u29BC\u29BE-\u29C5\u29C9\u29CD-\u29D0\u29DC-\u29DE\u29E3-\u29E5\u29EB\u29F4\u29F6\u2A00-\u2A02\u2A04\u2A06\u2A0C\u2A0D\u2A10-\u2A17\u2A22-\u2A27\u2A29\u2A2A\u2A2D-\u2A31\u2A33-\u2A3C\u2A3F\u2A40\u2A42-\u2A4D\u2A50\u2A53-\u2A58\u2A5A-\u2A5D\u2A5F\u2A66\u2A6A\u2A6D-\u2A75\u2A77-\u2A9A\u2A9D-\u2AA2\u2AA4-\u2AB0\u2AB3-\u2AC8\u2ACB\u2ACC\u2ACF-\u2ADB\u2AE4\u2AE6-\u2AE9\u2AEB-\u2AF3\u2AFD\uFB00-\uFB04]|\uD835[\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDCCF\uDD04\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDD6B]/g;
+  	var encodeMap = {'\xAD':'shy','\u200C':'zwnj','\u200D':'zwj','\u200E':'lrm','\u2063':'ic','\u2062':'it','\u2061':'af','\u200F':'rlm','\u200B':'ZeroWidthSpace','\u2060':'NoBreak','\u0311':'DownBreve','\u20DB':'tdot','\u20DC':'DotDot','\t':'Tab','\n':'NewLine','\u2008':'puncsp','\u205F':'MediumSpace','\u2009':'thinsp','\u200A':'hairsp','\u2004':'emsp13','\u2002':'ensp','\u2005':'emsp14','\u2003':'emsp','\u2007':'numsp','\xA0':'nbsp','\u205F\u200A':'ThickSpace','\u203E':'oline','_':'lowbar','\u2010':'dash','\u2013':'ndash','\u2014':'mdash','\u2015':'horbar',',':'comma',';':'semi','\u204F':'bsemi',':':'colon','\u2A74':'Colone','!':'excl','\xA1':'iexcl','?':'quest','\xBF':'iquest','.':'period','\u2025':'nldr','\u2026':'mldr','\xB7':'middot','\'':'apos','\u2018':'lsquo','\u2019':'rsquo','\u201A':'sbquo','\u2039':'lsaquo','\u203A':'rsaquo','"':'quot','\u201C':'ldquo','\u201D':'rdquo','\u201E':'bdquo','\xAB':'laquo','\xBB':'raquo','(':'lpar',')':'rpar','[':'lsqb',']':'rsqb','{':'lcub','}':'rcub','\u2308':'lceil','\u2309':'rceil','\u230A':'lfloor','\u230B':'rfloor','\u2985':'lopar','\u2986':'ropar','\u298B':'lbrke','\u298C':'rbrke','\u298D':'lbrkslu','\u298E':'rbrksld','\u298F':'lbrksld','\u2990':'rbrkslu','\u2991':'langd','\u2992':'rangd','\u2993':'lparlt','\u2994':'rpargt','\u2995':'gtlPar','\u2996':'ltrPar','\u27E6':'lobrk','\u27E7':'robrk','\u27E8':'lang','\u27E9':'rang','\u27EA':'Lang','\u27EB':'Rang','\u27EC':'loang','\u27ED':'roang','\u2772':'lbbrk','\u2773':'rbbrk','\u2016':'Vert','\xA7':'sect','\xB6':'para','@':'commat','*':'ast','/':'sol','undefined':null,'&':'amp','#':'num','%':'percnt','\u2030':'permil','\u2031':'pertenk','\u2020':'dagger','\u2021':'Dagger','\u2022':'bull','\u2043':'hybull','\u2032':'prime','\u2033':'Prime','\u2034':'tprime','\u2057':'qprime','\u2035':'bprime','\u2041':'caret','`':'grave','\xB4':'acute','\u02DC':'tilde','^':'Hat','\xAF':'macr','\u02D8':'breve','\u02D9':'dot','\xA8':'die','\u02DA':'ring','\u02DD':'dblac','\xB8':'cedil','\u02DB':'ogon','\u02C6':'circ','\u02C7':'caron','\xB0':'deg','\xA9':'copy','\xAE':'reg','\u2117':'copysr','\u2118':'wp','\u211E':'rx','\u2127':'mho','\u2129':'iiota','\u2190':'larr','\u219A':'nlarr','\u2192':'rarr','\u219B':'nrarr','\u2191':'uarr','\u2193':'darr','\u2194':'harr','\u21AE':'nharr','\u2195':'varr','\u2196':'nwarr','\u2197':'nearr','\u2198':'searr','\u2199':'swarr','\u219D':'rarrw','\u219D\u0338':'nrarrw','\u219E':'Larr','\u219F':'Uarr','\u21A0':'Rarr','\u21A1':'Darr','\u21A2':'larrtl','\u21A3':'rarrtl','\u21A4':'mapstoleft','\u21A5':'mapstoup','\u21A6':'map','\u21A7':'mapstodown','\u21A9':'larrhk','\u21AA':'rarrhk','\u21AB':'larrlp','\u21AC':'rarrlp','\u21AD':'harrw','\u21B0':'lsh','\u21B1':'rsh','\u21B2':'ldsh','\u21B3':'rdsh','\u21B5':'crarr','\u21B6':'cularr','\u21B7':'curarr','\u21BA':'olarr','\u21BB':'orarr','\u21BC':'lharu','\u21BD':'lhard','\u21BE':'uharr','\u21BF':'uharl','\u21C0':'rharu','\u21C1':'rhard','\u21C2':'dharr','\u21C3':'dharl','\u21C4':'rlarr','\u21C5':'udarr','\u21C6':'lrarr','\u21C7':'llarr','\u21C8':'uuarr','\u21C9':'rrarr','\u21CA':'ddarr','\u21CB':'lrhar','\u21CC':'rlhar','\u21D0':'lArr','\u21CD':'nlArr','\u21D1':'uArr','\u21D2':'rArr','\u21CF':'nrArr','\u21D3':'dArr','\u21D4':'iff','\u21CE':'nhArr','\u21D5':'vArr','\u21D6':'nwArr','\u21D7':'neArr','\u21D8':'seArr','\u21D9':'swArr','\u21DA':'lAarr','\u21DB':'rAarr','\u21DD':'zigrarr','\u21E4':'larrb','\u21E5':'rarrb','\u21F5':'duarr','\u21FD':'loarr','\u21FE':'roarr','\u21FF':'hoarr','\u2200':'forall','\u2201':'comp','\u2202':'part','\u2202\u0338':'npart','\u2203':'exist','\u2204':'nexist','\u2205':'empty','\u2207':'Del','\u2208':'in','\u2209':'notin','\u220B':'ni','\u220C':'notni','\u03F6':'bepsi','\u220F':'prod','\u2210':'coprod','\u2211':'sum','+':'plus','\xB1':'pm','\xF7':'div','\xD7':'times','<':'lt','\u226E':'nlt','<\u20D2':'nvlt','=':'equals','\u2260':'ne','=\u20E5':'bne','\u2A75':'Equal','>':'gt','\u226F':'ngt','>\u20D2':'nvgt','\xAC':'not','|':'vert','\xA6':'brvbar','\u2212':'minus','\u2213':'mp','\u2214':'plusdo','\u2044':'frasl','\u2216':'setmn','\u2217':'lowast','\u2218':'compfn','\u221A':'Sqrt','\u221D':'prop','\u221E':'infin','\u221F':'angrt','\u2220':'ang','\u2220\u20D2':'nang','\u2221':'angmsd','\u2222':'angsph','\u2223':'mid','\u2224':'nmid','\u2225':'par','\u2226':'npar','\u2227':'and','\u2228':'or','\u2229':'cap','\u2229\uFE00':'caps','\u222A':'cup','\u222A\uFE00':'cups','\u222B':'int','\u222C':'Int','\u222D':'tint','\u2A0C':'qint','\u222E':'oint','\u222F':'Conint','\u2230':'Cconint','\u2231':'cwint','\u2232':'cwconint','\u2233':'awconint','\u2234':'there4','\u2235':'becaus','\u2236':'ratio','\u2237':'Colon','\u2238':'minusd','\u223A':'mDDot','\u223B':'homtht','\u223C':'sim','\u2241':'nsim','\u223C\u20D2':'nvsim','\u223D':'bsim','\u223D\u0331':'race','\u223E':'ac','\u223E\u0333':'acE','\u223F':'acd','\u2240':'wr','\u2242':'esim','\u2242\u0338':'nesim','\u2243':'sime','\u2244':'nsime','\u2245':'cong','\u2247':'ncong','\u2246':'simne','\u2248':'ap','\u2249':'nap','\u224A':'ape','\u224B':'apid','\u224B\u0338':'napid','\u224C':'bcong','\u224D':'CupCap','\u226D':'NotCupCap','\u224D\u20D2':'nvap','\u224E':'bump','\u224E\u0338':'nbump','\u224F':'bumpe','\u224F\u0338':'nbumpe','\u2250':'doteq','\u2250\u0338':'nedot','\u2251':'eDot','\u2252':'efDot','\u2253':'erDot','\u2254':'colone','\u2255':'ecolon','\u2256':'ecir','\u2257':'cire','\u2259':'wedgeq','\u225A':'veeeq','\u225C':'trie','\u225F':'equest','\u2261':'equiv','\u2262':'nequiv','\u2261\u20E5':'bnequiv','\u2264':'le','\u2270':'nle','\u2264\u20D2':'nvle','\u2265':'ge','\u2271':'nge','\u2265\u20D2':'nvge','\u2266':'lE','\u2266\u0338':'nlE','\u2267':'gE','\u2267\u0338':'ngE','\u2268\uFE00':'lvnE','\u2268':'lnE','\u2269':'gnE','\u2269\uFE00':'gvnE','\u226A':'ll','\u226A\u0338':'nLtv','\u226A\u20D2':'nLt','\u226B':'gg','\u226B\u0338':'nGtv','\u226B\u20D2':'nGt','\u226C':'twixt','\u2272':'lsim','\u2274':'nlsim','\u2273':'gsim','\u2275':'ngsim','\u2276':'lg','\u2278':'ntlg','\u2277':'gl','\u2279':'ntgl','\u227A':'pr','\u2280':'npr','\u227B':'sc','\u2281':'nsc','\u227C':'prcue','\u22E0':'nprcue','\u227D':'sccue','\u22E1':'nsccue','\u227E':'prsim','\u227F':'scsim','\u227F\u0338':'NotSucceedsTilde','\u2282':'sub','\u2284':'nsub','\u2282\u20D2':'vnsub','\u2283':'sup','\u2285':'nsup','\u2283\u20D2':'vnsup','\u2286':'sube','\u2288':'nsube','\u2287':'supe','\u2289':'nsupe','\u228A\uFE00':'vsubne','\u228A':'subne','\u228B\uFE00':'vsupne','\u228B':'supne','\u228D':'cupdot','\u228E':'uplus','\u228F':'sqsub','\u228F\u0338':'NotSquareSubset','\u2290':'sqsup','\u2290\u0338':'NotSquareSuperset','\u2291':'sqsube','\u22E2':'nsqsube','\u2292':'sqsupe','\u22E3':'nsqsupe','\u2293':'sqcap','\u2293\uFE00':'sqcaps','\u2294':'sqcup','\u2294\uFE00':'sqcups','\u2295':'oplus','\u2296':'ominus','\u2297':'otimes','\u2298':'osol','\u2299':'odot','\u229A':'ocir','\u229B':'oast','\u229D':'odash','\u229E':'plusb','\u229F':'minusb','\u22A0':'timesb','\u22A1':'sdotb','\u22A2':'vdash','\u22AC':'nvdash','\u22A3':'dashv','\u22A4':'top','\u22A5':'bot','\u22A7':'models','\u22A8':'vDash','\u22AD':'nvDash','\u22A9':'Vdash','\u22AE':'nVdash','\u22AA':'Vvdash','\u22AB':'VDash','\u22AF':'nVDash','\u22B0':'prurel','\u22B2':'vltri','\u22EA':'nltri','\u22B3':'vrtri','\u22EB':'nrtri','\u22B4':'ltrie','\u22EC':'nltrie','\u22B4\u20D2':'nvltrie','\u22B5':'rtrie','\u22ED':'nrtrie','\u22B5\u20D2':'nvrtrie','\u22B6':'origof','\u22B7':'imof','\u22B8':'mumap','\u22B9':'hercon','\u22BA':'intcal','\u22BB':'veebar','\u22BD':'barvee','\u22BE':'angrtvb','\u22BF':'lrtri','\u22C0':'Wedge','\u22C1':'Vee','\u22C2':'xcap','\u22C3':'xcup','\u22C4':'diam','\u22C5':'sdot','\u22C6':'Star','\u22C7':'divonx','\u22C8':'bowtie','\u22C9':'ltimes','\u22CA':'rtimes','\u22CB':'lthree','\u22CC':'rthree','\u22CD':'bsime','\u22CE':'cuvee','\u22CF':'cuwed','\u22D0':'Sub','\u22D1':'Sup','\u22D2':'Cap','\u22D3':'Cup','\u22D4':'fork','\u22D5':'epar','\u22D6':'ltdot','\u22D7':'gtdot','\u22D8':'Ll','\u22D8\u0338':'nLl','\u22D9':'Gg','\u22D9\u0338':'nGg','\u22DA\uFE00':'lesg','\u22DA':'leg','\u22DB':'gel','\u22DB\uFE00':'gesl','\u22DE':'cuepr','\u22DF':'cuesc','\u22E6':'lnsim','\u22E7':'gnsim','\u22E8':'prnsim','\u22E9':'scnsim','\u22EE':'vellip','\u22EF':'ctdot','\u22F0':'utdot','\u22F1':'dtdot','\u22F2':'disin','\u22F3':'isinsv','\u22F4':'isins','\u22F5':'isindot','\u22F5\u0338':'notindot','\u22F6':'notinvc','\u22F7':'notinvb','\u22F9':'isinE','\u22F9\u0338':'notinE','\u22FA':'nisd','\u22FB':'xnis','\u22FC':'nis','\u22FD':'notnivc','\u22FE':'notnivb','\u2305':'barwed','\u2306':'Barwed','\u230C':'drcrop','\u230D':'dlcrop','\u230E':'urcrop','\u230F':'ulcrop','\u2310':'bnot','\u2312':'profline','\u2313':'profsurf','\u2315':'telrec','\u2316':'target','\u231C':'ulcorn','\u231D':'urcorn','\u231E':'dlcorn','\u231F':'drcorn','\u2322':'frown','\u2323':'smile','\u232D':'cylcty','\u232E':'profalar','\u2336':'topbot','\u233D':'ovbar','\u233F':'solbar','\u237C':'angzarr','\u23B0':'lmoust','\u23B1':'rmoust','\u23B4':'tbrk','\u23B5':'bbrk','\u23B6':'bbrktbrk','\u23DC':'OverParenthesis','\u23DD':'UnderParenthesis','\u23DE':'OverBrace','\u23DF':'UnderBrace','\u23E2':'trpezium','\u23E7':'elinters','\u2423':'blank','\u2500':'boxh','\u2502':'boxv','\u250C':'boxdr','\u2510':'boxdl','\u2514':'boxur','\u2518':'boxul','\u251C':'boxvr','\u2524':'boxvl','\u252C':'boxhd','\u2534':'boxhu','\u253C':'boxvh','\u2550':'boxH','\u2551':'boxV','\u2552':'boxdR','\u2553':'boxDr','\u2554':'boxDR','\u2555':'boxdL','\u2556':'boxDl','\u2557':'boxDL','\u2558':'boxuR','\u2559':'boxUr','\u255A':'boxUR','\u255B':'boxuL','\u255C':'boxUl','\u255D':'boxUL','\u255E':'boxvR','\u255F':'boxVr','\u2560':'boxVR','\u2561':'boxvL','\u2562':'boxVl','\u2563':'boxVL','\u2564':'boxHd','\u2565':'boxhD','\u2566':'boxHD','\u2567':'boxHu','\u2568':'boxhU','\u2569':'boxHU','\u256A':'boxvH','\u256B':'boxVh','\u256C':'boxVH','\u2580':'uhblk','\u2584':'lhblk','\u2588':'block','\u2591':'blk14','\u2592':'blk12','\u2593':'blk34','\u25A1':'squ','\u25AA':'squf','\u25AB':'EmptyVerySmallSquare','\u25AD':'rect','\u25AE':'marker','\u25B1':'fltns','\u25B3':'xutri','\u25B4':'utrif','\u25B5':'utri','\u25B8':'rtrif','\u25B9':'rtri','\u25BD':'xdtri','\u25BE':'dtrif','\u25BF':'dtri','\u25C2':'ltrif','\u25C3':'ltri','\u25CA':'loz','\u25CB':'cir','\u25EC':'tridot','\u25EF':'xcirc','\u25F8':'ultri','\u25F9':'urtri','\u25FA':'lltri','\u25FB':'EmptySmallSquare','\u25FC':'FilledSmallSquare','\u2605':'starf','\u2606':'star','\u260E':'phone','\u2640':'female','\u2642':'male','\u2660':'spades','\u2663':'clubs','\u2665':'hearts','\u2666':'diams','\u266A':'sung','\u2713':'check','\u2717':'cross','\u2720':'malt','\u2736':'sext','\u2758':'VerticalSeparator','\u27C8':'bsolhsub','\u27C9':'suphsol','\u27F5':'xlarr','\u27F6':'xrarr','\u27F7':'xharr','\u27F8':'xlArr','\u27F9':'xrArr','\u27FA':'xhArr','\u27FC':'xmap','\u27FF':'dzigrarr','\u2902':'nvlArr','\u2903':'nvrArr','\u2904':'nvHarr','\u2905':'Map','\u290C':'lbarr','\u290D':'rbarr','\u290E':'lBarr','\u290F':'rBarr','\u2910':'RBarr','\u2911':'DDotrahd','\u2912':'UpArrowBar','\u2913':'DownArrowBar','\u2916':'Rarrtl','\u2919':'latail','\u291A':'ratail','\u291B':'lAtail','\u291C':'rAtail','\u291D':'larrfs','\u291E':'rarrfs','\u291F':'larrbfs','\u2920':'rarrbfs','\u2923':'nwarhk','\u2924':'nearhk','\u2925':'searhk','\u2926':'swarhk','\u2927':'nwnear','\u2928':'toea','\u2929':'tosa','\u292A':'swnwar','\u2933':'rarrc','\u2933\u0338':'nrarrc','\u2935':'cudarrr','\u2936':'ldca','\u2937':'rdca','\u2938':'cudarrl','\u2939':'larrpl','\u293C':'curarrm','\u293D':'cularrp','\u2945':'rarrpl','\u2948':'harrcir','\u2949':'Uarrocir','\u294A':'lurdshar','\u294B':'ldrushar','\u294E':'LeftRightVector','\u294F':'RightUpDownVector','\u2950':'DownLeftRightVector','\u2951':'LeftUpDownVector','\u2952':'LeftVectorBar','\u2953':'RightVectorBar','\u2954':'RightUpVectorBar','\u2955':'RightDownVectorBar','\u2956':'DownLeftVectorBar','\u2957':'DownRightVectorBar','\u2958':'LeftUpVectorBar','\u2959':'LeftDownVectorBar','\u295A':'LeftTeeVector','\u295B':'RightTeeVector','\u295C':'RightUpTeeVector','\u295D':'RightDownTeeVector','\u295E':'DownLeftTeeVector','\u295F':'DownRightTeeVector','\u2960':'LeftUpTeeVector','\u2961':'LeftDownTeeVector','\u2962':'lHar','\u2963':'uHar','\u2964':'rHar','\u2965':'dHar','\u2966':'luruhar','\u2967':'ldrdhar','\u2968':'ruluhar','\u2969':'rdldhar','\u296A':'lharul','\u296B':'llhard','\u296C':'rharul','\u296D':'lrhard','\u296E':'udhar','\u296F':'duhar','\u2970':'RoundImplies','\u2971':'erarr','\u2972':'simrarr','\u2973':'larrsim','\u2974':'rarrsim','\u2975':'rarrap','\u2976':'ltlarr','\u2978':'gtrarr','\u2979':'subrarr','\u297B':'suplarr','\u297C':'lfisht','\u297D':'rfisht','\u297E':'ufisht','\u297F':'dfisht','\u299A':'vzigzag','\u299C':'vangrt','\u299D':'angrtvbd','\u29A4':'ange','\u29A5':'range','\u29A6':'dwangle','\u29A7':'uwangle','\u29A8':'angmsdaa','\u29A9':'angmsdab','\u29AA':'angmsdac','\u29AB':'angmsdad','\u29AC':'angmsdae','\u29AD':'angmsdaf','\u29AE':'angmsdag','\u29AF':'angmsdah','\u29B0':'bemptyv','\u29B1':'demptyv','\u29B2':'cemptyv','\u29B3':'raemptyv','\u29B4':'laemptyv','\u29B5':'ohbar','\u29B6':'omid','\u29B7':'opar','\u29B9':'operp','\u29BB':'olcross','\u29BC':'odsold','\u29BE':'olcir','\u29BF':'ofcir','\u29C0':'olt','\u29C1':'ogt','\u29C2':'cirscir','\u29C3':'cirE','\u29C4':'solb','\u29C5':'bsolb','\u29C9':'boxbox','\u29CD':'trisb','\u29CE':'rtriltri','\u29CF':'LeftTriangleBar','\u29CF\u0338':'NotLeftTriangleBar','\u29D0':'RightTriangleBar','\u29D0\u0338':'NotRightTriangleBar','\u29DC':'iinfin','\u29DD':'infintie','\u29DE':'nvinfin','\u29E3':'eparsl','\u29E4':'smeparsl','\u29E5':'eqvparsl','\u29EB':'lozf','\u29F4':'RuleDelayed','\u29F6':'dsol','\u2A00':'xodot','\u2A01':'xoplus','\u2A02':'xotime','\u2A04':'xuplus','\u2A06':'xsqcup','\u2A0D':'fpartint','\u2A10':'cirfnint','\u2A11':'awint','\u2A12':'rppolint','\u2A13':'scpolint','\u2A14':'npolint','\u2A15':'pointint','\u2A16':'quatint','\u2A17':'intlarhk','\u2A22':'pluscir','\u2A23':'plusacir','\u2A24':'simplus','\u2A25':'plusdu','\u2A26':'plussim','\u2A27':'plustwo','\u2A29':'mcomma','\u2A2A':'minusdu','\u2A2D':'loplus','\u2A2E':'roplus','\u2A2F':'Cross','\u2A30':'timesd','\u2A31':'timesbar','\u2A33':'smashp','\u2A34':'lotimes','\u2A35':'rotimes','\u2A36':'otimesas','\u2A37':'Otimes','\u2A38':'odiv','\u2A39':'triplus','\u2A3A':'triminus','\u2A3B':'tritime','\u2A3C':'iprod','\u2A3F':'amalg','\u2A40':'capdot','\u2A42':'ncup','\u2A43':'ncap','\u2A44':'capand','\u2A45':'cupor','\u2A46':'cupcap','\u2A47':'capcup','\u2A48':'cupbrcap','\u2A49':'capbrcup','\u2A4A':'cupcup','\u2A4B':'capcap','\u2A4C':'ccups','\u2A4D':'ccaps','\u2A50':'ccupssm','\u2A53':'And','\u2A54':'Or','\u2A55':'andand','\u2A56':'oror','\u2A57':'orslope','\u2A58':'andslope','\u2A5A':'andv','\u2A5B':'orv','\u2A5C':'andd','\u2A5D':'ord','\u2A5F':'wedbar','\u2A66':'sdote','\u2A6A':'simdot','\u2A6D':'congdot','\u2A6D\u0338':'ncongdot','\u2A6E':'easter','\u2A6F':'apacir','\u2A70':'apE','\u2A70\u0338':'napE','\u2A71':'eplus','\u2A72':'pluse','\u2A73':'Esim','\u2A77':'eDDot','\u2A78':'equivDD','\u2A79':'ltcir','\u2A7A':'gtcir','\u2A7B':'ltquest','\u2A7C':'gtquest','\u2A7D':'les','\u2A7D\u0338':'nles','\u2A7E':'ges','\u2A7E\u0338':'nges','\u2A7F':'lesdot','\u2A80':'gesdot','\u2A81':'lesdoto','\u2A82':'gesdoto','\u2A83':'lesdotor','\u2A84':'gesdotol','\u2A85':'lap','\u2A86':'gap','\u2A87':'lne','\u2A88':'gne','\u2A89':'lnap','\u2A8A':'gnap','\u2A8B':'lEg','\u2A8C':'gEl','\u2A8D':'lsime','\u2A8E':'gsime','\u2A8F':'lsimg','\u2A90':'gsiml','\u2A91':'lgE','\u2A92':'glE','\u2A93':'lesges','\u2A94':'gesles','\u2A95':'els','\u2A96':'egs','\u2A97':'elsdot','\u2A98':'egsdot','\u2A99':'el','\u2A9A':'eg','\u2A9D':'siml','\u2A9E':'simg','\u2A9F':'simlE','\u2AA0':'simgE','\u2AA1':'LessLess','\u2AA1\u0338':'NotNestedLessLess','\u2AA2':'GreaterGreater','\u2AA2\u0338':'NotNestedGreaterGreater','\u2AA4':'glj','\u2AA5':'gla','\u2AA6':'ltcc','\u2AA7':'gtcc','\u2AA8':'lescc','\u2AA9':'gescc','\u2AAA':'smt','\u2AAB':'lat','\u2AAC':'smte','\u2AAC\uFE00':'smtes','\u2AAD':'late','\u2AAD\uFE00':'lates','\u2AAE':'bumpE','\u2AAF':'pre','\u2AAF\u0338':'npre','\u2AB0':'sce','\u2AB0\u0338':'nsce','\u2AB3':'prE','\u2AB4':'scE','\u2AB5':'prnE','\u2AB6':'scnE','\u2AB7':'prap','\u2AB8':'scap','\u2AB9':'prnap','\u2ABA':'scnap','\u2ABB':'Pr','\u2ABC':'Sc','\u2ABD':'subdot','\u2ABE':'supdot','\u2ABF':'subplus','\u2AC0':'supplus','\u2AC1':'submult','\u2AC2':'supmult','\u2AC3':'subedot','\u2AC4':'supedot','\u2AC5':'subE','\u2AC5\u0338':'nsubE','\u2AC6':'supE','\u2AC6\u0338':'nsupE','\u2AC7':'subsim','\u2AC8':'supsim','\u2ACB\uFE00':'vsubnE','\u2ACB':'subnE','\u2ACC\uFE00':'vsupnE','\u2ACC':'supnE','\u2ACF':'csub','\u2AD0':'csup','\u2AD1':'csube','\u2AD2':'csupe','\u2AD3':'subsup','\u2AD4':'supsub','\u2AD5':'subsub','\u2AD6':'supsup','\u2AD7':'suphsub','\u2AD8':'supdsub','\u2AD9':'forkv','\u2ADA':'topfork','\u2ADB':'mlcp','\u2AE4':'Dashv','\u2AE6':'Vdashl','\u2AE7':'Barv','\u2AE8':'vBar','\u2AE9':'vBarv','\u2AEB':'Vbar','\u2AEC':'Not','\u2AED':'bNot','\u2AEE':'rnmid','\u2AEF':'cirmid','\u2AF0':'midcir','\u2AF1':'topcir','\u2AF2':'nhpar','\u2AF3':'parsim','\u2AFD':'parsl','\u2AFD\u20E5':'nparsl','\u266D':'flat','\u266E':'natur','\u266F':'sharp','\xA4':'curren','\xA2':'cent','$':'dollar','\xA3':'pound','\xA5':'yen','\u20AC':'euro','\xB9':'sup1','\xBD':'half','\u2153':'frac13','\xBC':'frac14','\u2155':'frac15','\u2159':'frac16','\u215B':'frac18','\xB2':'sup2','\u2154':'frac23','\u2156':'frac25','\xB3':'sup3','\xBE':'frac34','\u2157':'frac35','\u215C':'frac38','\u2158':'frac45','\u215A':'frac56','\u215D':'frac58','\u215E':'frac78','\uD835\uDCB6':'ascr','\uD835\uDD52':'aopf','\uD835\uDD1E':'afr','\uD835\uDD38':'Aopf','\uD835\uDD04':'Afr','\uD835\uDC9C':'Ascr','\xAA':'ordf','\xE1':'aacute','\xC1':'Aacute','\xE0':'agrave','\xC0':'Agrave','\u0103':'abreve','\u0102':'Abreve','\xE2':'acirc','\xC2':'Acirc','\xE5':'aring','\xC5':'angst','\xE4':'auml','\xC4':'Auml','\xE3':'atilde','\xC3':'Atilde','\u0105':'aogon','\u0104':'Aogon','\u0101':'amacr','\u0100':'Amacr','\xE6':'aelig','\xC6':'AElig','\uD835\uDCB7':'bscr','\uD835\uDD53':'bopf','\uD835\uDD1F':'bfr','\uD835\uDD39':'Bopf','\u212C':'Bscr','\uD835\uDD05':'Bfr','\uD835\uDD20':'cfr','\uD835\uDCB8':'cscr','\uD835\uDD54':'copf','\u212D':'Cfr','\uD835\uDC9E':'Cscr','\u2102':'Copf','\u0107':'cacute','\u0106':'Cacute','\u0109':'ccirc','\u0108':'Ccirc','\u010D':'ccaron','\u010C':'Ccaron','\u010B':'cdot','\u010A':'Cdot','\xE7':'ccedil','\xC7':'Ccedil','\u2105':'incare','\uD835\uDD21':'dfr','\u2146':'dd','\uD835\uDD55':'dopf','\uD835\uDCB9':'dscr','\uD835\uDC9F':'Dscr','\uD835\uDD07':'Dfr','\u2145':'DD','\uD835\uDD3B':'Dopf','\u010F':'dcaron','\u010E':'Dcaron','\u0111':'dstrok','\u0110':'Dstrok','\xF0':'eth','\xD0':'ETH','\u2147':'ee','\u212F':'escr','\uD835\uDD22':'efr','\uD835\uDD56':'eopf','\u2130':'Escr','\uD835\uDD08':'Efr','\uD835\uDD3C':'Eopf','\xE9':'eacute','\xC9':'Eacute','\xE8':'egrave','\xC8':'Egrave','\xEA':'ecirc','\xCA':'Ecirc','\u011B':'ecaron','\u011A':'Ecaron','\xEB':'euml','\xCB':'Euml','\u0117':'edot','\u0116':'Edot','\u0119':'eogon','\u0118':'Eogon','\u0113':'emacr','\u0112':'Emacr','\uD835\uDD23':'ffr','\uD835\uDD57':'fopf','\uD835\uDCBB':'fscr','\uD835\uDD09':'Ffr','\uD835\uDD3D':'Fopf','\u2131':'Fscr','\uFB00':'fflig','\uFB03':'ffilig','\uFB04':'ffllig','\uFB01':'filig','fj':'fjlig','\uFB02':'fllig','\u0192':'fnof','\u210A':'gscr','\uD835\uDD58':'gopf','\uD835\uDD24':'gfr','\uD835\uDCA2':'Gscr','\uD835\uDD3E':'Gopf','\uD835\uDD0A':'Gfr','\u01F5':'gacute','\u011F':'gbreve','\u011E':'Gbreve','\u011D':'gcirc','\u011C':'Gcirc','\u0121':'gdot','\u0120':'Gdot','\u0122':'Gcedil','\uD835\uDD25':'hfr','\u210E':'planckh','\uD835\uDCBD':'hscr','\uD835\uDD59':'hopf','\u210B':'Hscr','\u210C':'Hfr','\u210D':'Hopf','\u0125':'hcirc','\u0124':'Hcirc','\u210F':'hbar','\u0127':'hstrok','\u0126':'Hstrok','\uD835\uDD5A':'iopf','\uD835\uDD26':'ifr','\uD835\uDCBE':'iscr','\u2148':'ii','\uD835\uDD40':'Iopf','\u2110':'Iscr','\u2111':'Im','\xED':'iacute','\xCD':'Iacute','\xEC':'igrave','\xCC':'Igrave','\xEE':'icirc','\xCE':'Icirc','\xEF':'iuml','\xCF':'Iuml','\u0129':'itilde','\u0128':'Itilde','\u0130':'Idot','\u012F':'iogon','\u012E':'Iogon','\u012B':'imacr','\u012A':'Imacr','\u0133':'ijlig','\u0132':'IJlig','\u0131':'imath','\uD835\uDCBF':'jscr','\uD835\uDD5B':'jopf','\uD835\uDD27':'jfr','\uD835\uDCA5':'Jscr','\uD835\uDD0D':'Jfr','\uD835\uDD41':'Jopf','\u0135':'jcirc','\u0134':'Jcirc','\u0237':'jmath','\uD835\uDD5C':'kopf','\uD835\uDCC0':'kscr','\uD835\uDD28':'kfr','\uD835\uDCA6':'Kscr','\uD835\uDD42':'Kopf','\uD835\uDD0E':'Kfr','\u0137':'kcedil','\u0136':'Kcedil','\uD835\uDD29':'lfr','\uD835\uDCC1':'lscr','\u2113':'ell','\uD835\uDD5D':'lopf','\u2112':'Lscr','\uD835\uDD0F':'Lfr','\uD835\uDD43':'Lopf','\u013A':'lacute','\u0139':'Lacute','\u013E':'lcaron','\u013D':'Lcaron','\u013C':'lcedil','\u013B':'Lcedil','\u0142':'lstrok','\u0141':'Lstrok','\u0140':'lmidot','\u013F':'Lmidot','\uD835\uDD2A':'mfr','\uD835\uDD5E':'mopf','\uD835\uDCC2':'mscr','\uD835\uDD10':'Mfr','\uD835\uDD44':'Mopf','\u2133':'Mscr','\uD835\uDD2B':'nfr','\uD835\uDD5F':'nopf','\uD835\uDCC3':'nscr','\u2115':'Nopf','\uD835\uDCA9':'Nscr','\uD835\uDD11':'Nfr','\u0144':'nacute','\u0143':'Nacute','\u0148':'ncaron','\u0147':'Ncaron','\xF1':'ntilde','\xD1':'Ntilde','\u0146':'ncedil','\u0145':'Ncedil','\u2116':'numero','\u014B':'eng','\u014A':'ENG','\uD835\uDD60':'oopf','\uD835\uDD2C':'ofr','\u2134':'oscr','\uD835\uDCAA':'Oscr','\uD835\uDD12':'Ofr','\uD835\uDD46':'Oopf','\xBA':'ordm','\xF3':'oacute','\xD3':'Oacute','\xF2':'ograve','\xD2':'Ograve','\xF4':'ocirc','\xD4':'Ocirc','\xF6':'ouml','\xD6':'Ouml','\u0151':'odblac','\u0150':'Odblac','\xF5':'otilde','\xD5':'Otilde','\xF8':'oslash','\xD8':'Oslash','\u014D':'omacr','\u014C':'Omacr','\u0153':'oelig','\u0152':'OElig','\uD835\uDD2D':'pfr','\uD835\uDCC5':'pscr','\uD835\uDD61':'popf','\u2119':'Popf','\uD835\uDD13':'Pfr','\uD835\uDCAB':'Pscr','\uD835\uDD62':'qopf','\uD835\uDD2E':'qfr','\uD835\uDCC6':'qscr','\uD835\uDCAC':'Qscr','\uD835\uDD14':'Qfr','\u211A':'Qopf','\u0138':'kgreen','\uD835\uDD2F':'rfr','\uD835\uDD63':'ropf','\uD835\uDCC7':'rscr','\u211B':'Rscr','\u211C':'Re','\u211D':'Ropf','\u0155':'racute','\u0154':'Racute','\u0159':'rcaron','\u0158':'Rcaron','\u0157':'rcedil','\u0156':'Rcedil','\uD835\uDD64':'sopf','\uD835\uDCC8':'sscr','\uD835\uDD30':'sfr','\uD835\uDD4A':'Sopf','\uD835\uDD16':'Sfr','\uD835\uDCAE':'Sscr','\u24C8':'oS','\u015B':'sacute','\u015A':'Sacute','\u015D':'scirc','\u015C':'Scirc','\u0161':'scaron','\u0160':'Scaron','\u015F':'scedil','\u015E':'Scedil','\xDF':'szlig','\uD835\uDD31':'tfr','\uD835\uDCC9':'tscr','\uD835\uDD65':'topf','\uD835\uDCAF':'Tscr','\uD835\uDD17':'Tfr','\uD835\uDD4B':'Topf','\u0165':'tcaron','\u0164':'Tcaron','\u0163':'tcedil','\u0162':'Tcedil','\u2122':'trade','\u0167':'tstrok','\u0166':'Tstrok','\uD835\uDCCA':'uscr','\uD835\uDD66':'uopf','\uD835\uDD32':'ufr','\uD835\uDD4C':'Uopf','\uD835\uDD18':'Ufr','\uD835\uDCB0':'Uscr','\xFA':'uacute','\xDA':'Uacute','\xF9':'ugrave','\xD9':'Ugrave','\u016D':'ubreve','\u016C':'Ubreve','\xFB':'ucirc','\xDB':'Ucirc','\u016F':'uring','\u016E':'Uring','\xFC':'uuml','\xDC':'Uuml','\u0171':'udblac','\u0170':'Udblac','\u0169':'utilde','\u0168':'Utilde','\u0173':'uogon','\u0172':'Uogon','\u016B':'umacr','\u016A':'Umacr','\uD835\uDD33':'vfr','\uD835\uDD67':'vopf','\uD835\uDCCB':'vscr','\uD835\uDD19':'Vfr','\uD835\uDD4D':'Vopf','\uD835\uDCB1':'Vscr','\uD835\uDD68':'wopf','\uD835\uDCCC':'wscr','\uD835\uDD34':'wfr','\uD835\uDCB2':'Wscr','\uD835\uDD4E':'Wopf','\uD835\uDD1A':'Wfr','\u0175':'wcirc','\u0174':'Wcirc','\uD835\uDD35':'xfr','\uD835\uDCCD':'xscr','\uD835\uDD69':'xopf','\uD835\uDD4F':'Xopf','\uD835\uDD1B':'Xfr','\uD835\uDCB3':'Xscr','\uD835\uDD36':'yfr','\uD835\uDCCE':'yscr','\uD835\uDD6A':'yopf','\uD835\uDCB4':'Yscr','\uD835\uDD1C':'Yfr','\uD835\uDD50':'Yopf','\xFD':'yacute','\xDD':'Yacute','\u0177':'ycirc','\u0176':'Ycirc','\xFF':'yuml','\u0178':'Yuml','\uD835\uDCCF':'zscr','\uD835\uDD37':'zfr','\uD835\uDD6B':'zopf','\u2128':'Zfr','\u2124':'Zopf','\uD835\uDCB5':'Zscr','\u017A':'zacute','\u0179':'Zacute','\u017E':'zcaron','\u017D':'Zcaron','\u017C':'zdot','\u017B':'Zdot','\u01B5':'imped','\xFE':'thorn','\xDE':'THORN','\u0149':'napos','\u03B1':'alpha','\u0391':'Alpha','\u03B2':'beta','\u0392':'Beta','\u03B3':'gamma','\u0393':'Gamma','\u03B4':'delta','\u0394':'Delta','\u03B5':'epsi','\u03F5':'epsiv','\u0395':'Epsilon','\u03DD':'gammad','\u03DC':'Gammad','\u03B6':'zeta','\u0396':'Zeta','\u03B7':'eta','\u0397':'Eta','\u03B8':'theta','\u03D1':'thetav','\u0398':'Theta','\u03B9':'iota','\u0399':'Iota','\u03BA':'kappa','\u03F0':'kappav','\u039A':'Kappa','\u03BB':'lambda','\u039B':'Lambda','\u03BC':'mu','\xB5':'micro','\u039C':'Mu','\u03BD':'nu','\u039D':'Nu','\u03BE':'xi','\u039E':'Xi','\u03BF':'omicron','\u039F':'Omicron','\u03C0':'pi','\u03D6':'piv','\u03A0':'Pi','\u03C1':'rho','\u03F1':'rhov','\u03A1':'Rho','\u03C3':'sigma','\u03A3':'Sigma','\u03C2':'sigmaf','\u03C4':'tau','\u03A4':'Tau','\u03C5':'upsi','\u03A5':'Upsilon','\u03D2':'Upsi','\u03C6':'phi','\u03D5':'phiv','\u03A6':'Phi','\u03C7':'chi','\u03A7':'Chi','\u03C8':'psi','\u03A8':'Psi','\u03C9':'omega','\u03A9':'ohm','\u0430':'acy','\u0410':'Acy','\u0431':'bcy','\u0411':'Bcy','\u0432':'vcy','\u0412':'Vcy','\u0433':'gcy','\u0413':'Gcy','\u0453':'gjcy','\u0403':'GJcy','\u0434':'dcy','\u0414':'Dcy','\u0452':'djcy','\u0402':'DJcy','\u0435':'iecy','\u0415':'IEcy','\u0451':'iocy','\u0401':'IOcy','\u0454':'jukcy','\u0404':'Jukcy','\u0436':'zhcy','\u0416':'ZHcy','\u0437':'zcy','\u0417':'Zcy','\u0455':'dscy','\u0405':'DScy','\u0438':'icy','\u0418':'Icy','\u0456':'iukcy','\u0406':'Iukcy','\u0457':'yicy','\u0407':'YIcy','\u0439':'jcy','\u0419':'Jcy','\u0458':'jsercy','\u0408':'Jsercy','\u043A':'kcy','\u041A':'Kcy','\u045C':'kjcy','\u040C':'KJcy','\u043B':'lcy','\u041B':'Lcy','\u0459':'ljcy','\u0409':'LJcy','\u043C':'mcy','\u041C':'Mcy','\u043D':'ncy','\u041D':'Ncy','\u045A':'njcy','\u040A':'NJcy','\u043E':'ocy','\u041E':'Ocy','\u043F':'pcy','\u041F':'Pcy','\u0440':'rcy','\u0420':'Rcy','\u0441':'scy','\u0421':'Scy','\u0442':'tcy','\u0422':'Tcy','\u045B':'tshcy','\u040B':'TSHcy','\u0443':'ucy','\u0423':'Ucy','\u045E':'ubrcy','\u040E':'Ubrcy','\u0444':'fcy','\u0424':'Fcy','\u0445':'khcy','\u0425':'KHcy','\u0446':'tscy','\u0426':'TScy','\u0447':'chcy','\u0427':'CHcy','\u045F':'dzcy','\u040F':'DZcy','\u0448':'shcy','\u0428':'SHcy','\u0449':'shchcy','\u0429':'SHCHcy','\u044A':'hardcy','\u042A':'HARDcy','\u044B':'ycy','\u042B':'Ycy','\u044C':'softcy','\u042C':'SOFTcy','\u044D':'ecy','\u042D':'Ecy','\u044E':'yucy','\u042E':'YUcy','\u044F':'yacy','\u042F':'YAcy','\u2135':'aleph','\u2136':'beth','\u2137':'gimel','\u2138':'daleth'};
+
+  	var regexEscape = /["&'<>`]/g;
+  	var escapeMap = {
+  		'"': '&quot;',
+  		'&': '&amp;',
+  		'\'': '&#x27;',
+  		'<': '&lt;',
+  		// See https://mathiasbynens.be/notes/ambiguous-ampersands: in HTML, the
+  		// following is not strictly necessary unless it’s part of a tag or an
+  		// unquoted attribute value. We’re only escaping it to support those
+  		// situations, and for XML support.
+  		'>': '&gt;',
+  		// In Internet Explorer ≤ 8, the backtick character can be used
+  		// to break out of (un)quoted attribute values or HTML comments.
+  		// See http://html5sec.org/#102, http://html5sec.org/#108, and
+  		// http://html5sec.org/#133.
+  		'`': '&#x60;'
+  	};
+
+  	var regexInvalidEntity = /&#(?:[xX][^a-fA-F0-9]|[^0-9xX])/;
+  	var regexInvalidRawCodePoint = /[\0-\x08\x0B\x0E-\x1F\x7F-\x9F\uFDD0-\uFDEF\uFFFE\uFFFF]|[\uD83F\uD87F\uD8BF\uD8FF\uD93F\uD97F\uD9BF\uD9FF\uDA3F\uDA7F\uDABF\uDAFF\uDB3F\uDB7F\uDBBF\uDBFF][\uDFFE\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+  	var regexDecode = /&(CounterClockwiseContourIntegral|DoubleLongLeftRightArrow|ClockwiseContourIntegral|NotNestedGreaterGreater|NotSquareSupersetEqual|DiacriticalDoubleAcute|NotRightTriangleEqual|NotSucceedsSlantEqual|NotPrecedesSlantEqual|CloseCurlyDoubleQuote|NegativeVeryThinSpace|DoubleContourIntegral|FilledVerySmallSquare|CapitalDifferentialD|OpenCurlyDoubleQuote|EmptyVerySmallSquare|NestedGreaterGreater|DoubleLongRightArrow|NotLeftTriangleEqual|NotGreaterSlantEqual|ReverseUpEquilibrium|DoubleLeftRightArrow|NotSquareSubsetEqual|NotDoubleVerticalBar|RightArrowLeftArrow|NotGreaterFullEqual|NotRightTriangleBar|SquareSupersetEqual|DownLeftRightVector|DoubleLongLeftArrow|leftrightsquigarrow|LeftArrowRightArrow|NegativeMediumSpace|blacktriangleright|RightDownVectorBar|PrecedesSlantEqual|RightDoubleBracket|SucceedsSlantEqual|NotLeftTriangleBar|RightTriangleEqual|SquareIntersection|RightDownTeeVector|ReverseEquilibrium|NegativeThickSpace|longleftrightarrow|Longleftrightarrow|LongLeftRightArrow|DownRightTeeVector|DownRightVectorBar|GreaterSlantEqual|SquareSubsetEqual|LeftDownVectorBar|LeftDoubleBracket|VerticalSeparator|rightleftharpoons|NotGreaterGreater|NotSquareSuperset|blacktriangleleft|blacktriangledown|NegativeThinSpace|LeftDownTeeVector|NotLessSlantEqual|leftrightharpoons|DoubleUpDownArrow|DoubleVerticalBar|LeftTriangleEqual|FilledSmallSquare|twoheadrightarrow|NotNestedLessLess|DownLeftTeeVector|DownLeftVectorBar|RightAngleBracket|NotTildeFullEqual|NotReverseElement|RightUpDownVector|DiacriticalTilde|NotSucceedsTilde|circlearrowright|NotPrecedesEqual|rightharpoondown|DoubleRightArrow|NotSucceedsEqual|NonBreakingSpace|NotRightTriangle|LessEqualGreater|RightUpTeeVector|LeftAngleBracket|GreaterFullEqual|DownArrowUpArrow|RightUpVectorBar|twoheadleftarrow|GreaterEqualLess|downharpoonright|RightTriangleBar|ntrianglerighteq|NotSupersetEqual|LeftUpDownVector|DiacriticalAcute|rightrightarrows|vartriangleright|UpArrowDownArrow|DiacriticalGrave|UnderParenthesis|EmptySmallSquare|LeftUpVectorBar|leftrightarrows|DownRightVector|downharpoonleft|trianglerighteq|ShortRightArrow|OverParenthesis|DoubleLeftArrow|DoubleDownArrow|NotSquareSubset|bigtriangledown|ntrianglelefteq|UpperRightArrow|curvearrowright|vartriangleleft|NotLeftTriangle|nleftrightarrow|LowerRightArrow|NotHumpDownHump|NotGreaterTilde|rightthreetimes|LeftUpTeeVector|NotGreaterEqual|straightepsilon|LeftTriangleBar|rightsquigarrow|ContourIntegral|rightleftarrows|CloseCurlyQuote|RightDownVector|LeftRightVector|nLeftrightarrow|leftharpoondown|circlearrowleft|SquareSuperset|OpenCurlyQuote|hookrightarrow|HorizontalLine|DiacriticalDot|NotLessGreater|ntriangleright|DoubleRightTee|InvisibleComma|InvisibleTimes|LowerLeftArrow|DownLeftVector|NotSubsetEqual|curvearrowleft|trianglelefteq|NotVerticalBar|TildeFullEqual|downdownarrows|NotGreaterLess|RightTeeVector|ZeroWidthSpace|looparrowright|LongRightArrow|doublebarwedge|ShortLeftArrow|ShortDownArrow|RightVectorBar|GreaterGreater|ReverseElement|rightharpoonup|LessSlantEqual|leftthreetimes|upharpoonright|rightarrowtail|LeftDownVector|Longrightarrow|NestedLessLess|UpperLeftArrow|nshortparallel|leftleftarrows|leftrightarrow|Leftrightarrow|LeftRightArrow|longrightarrow|upharpoonleft|RightArrowBar|ApplyFunction|LeftTeeVector|leftarrowtail|NotEqualTilde|varsubsetneqq|varsupsetneqq|RightTeeArrow|SucceedsEqual|SucceedsTilde|LeftVectorBar|SupersetEqual|hookleftarrow|DifferentialD|VerticalTilde|VeryThinSpace|blacktriangle|bigtriangleup|LessFullEqual|divideontimes|leftharpoonup|UpEquilibrium|ntriangleleft|RightTriangle|measuredangle|shortparallel|longleftarrow|Longleftarrow|LongLeftArrow|DoubleLeftTee|Poincareplane|PrecedesEqual|triangleright|DoubleUpArrow|RightUpVector|fallingdotseq|looparrowleft|PrecedesTilde|NotTildeEqual|NotTildeTilde|smallsetminus|Proportional|triangleleft|triangledown|UnderBracket|NotHumpEqual|exponentiale|ExponentialE|NotLessTilde|HilbertSpace|RightCeiling|blacklozenge|varsupsetneq|HumpDownHump|GreaterEqual|VerticalLine|LeftTeeArrow|NotLessEqual|DownTeeArrow|LeftTriangle|varsubsetneq|Intersection|NotCongruent|DownArrowBar|LeftUpVector|LeftArrowBar|risingdotseq|GreaterTilde|RoundImplies|SquareSubset|ShortUpArrow|NotSuperset|quaternions|precnapprox|backepsilon|preccurlyeq|OverBracket|blacksquare|MediumSpace|VerticalBar|circledcirc|circleddash|CircleMinus|CircleTimes|LessGreater|curlyeqprec|curlyeqsucc|diamondsuit|UpDownArrow|Updownarrow|RuleDelayed|Rrightarrow|updownarrow|RightVector|nRightarrow|nrightarrow|eqslantless|LeftCeiling|Equilibrium|SmallCircle|expectation|NotSucceeds|thickapprox|GreaterLess|SquareUnion|NotPrecedes|NotLessLess|straightphi|succnapprox|succcurlyeq|SubsetEqual|sqsupseteq|Proportion|Laplacetrf|ImaginaryI|supsetneqq|NotGreater|gtreqqless|NotElement|ThickSpace|TildeEqual|TildeTilde|Fouriertrf|rmoustache|EqualTilde|eqslantgtr|UnderBrace|LeftVector|UpArrowBar|nLeftarrow|nsubseteqq|subsetneqq|nsupseteqq|nleftarrow|succapprox|lessapprox|UpTeeArrow|upuparrows|curlywedge|lesseqqgtr|varepsilon|varnothing|RightFloor|c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|Fscr|gdot|gsim|Gscr|gscr|Gopf|gopf|gneq|Gdot|tosa|gnap|Topf|topf|geqq|toea|GJcy|gjcy|tint|gesl|mid|Sfr|ggg|top|ges|gla|glE|glj|geq|gne|gEl|gel|gnE|Gcy|gcy|gap|Tfr|tfr|Tcy|tcy|Hat|Tau|Ffr|tau|Tab|hfr|Hfr|ffr|Fcy|fcy|icy|Icy|iff|ETH|eth|ifr|Ifr|Eta|eta|int|Int|Sup|sup|ucy|Ucy|Sum|sum|jcy|ENG|ufr|Ufr|eng|Jcy|jfr|els|ell|egs|Efr|efr|Jfr|uml|kcy|Kcy|Ecy|ecy|kfr|Kfr|lap|Sub|sub|lat|lcy|Lcy|leg|Dot|dot|lEg|leq|les|squ|div|die|lfr|Lfr|lgE|Dfr|dfr|Del|deg|Dcy|dcy|lne|lnE|sol|loz|smt|Cup|lrm|cup|lsh|Lsh|sim|shy|map|Map|mcy|Mcy|mfr|Mfr|mho|gfr|Gfr|sfr|cir|Chi|chi|nap|Cfr|vcy|Vcy|cfr|Scy|scy|ncy|Ncy|vee|Vee|Cap|cap|nfr|scE|sce|Nfr|nge|ngE|nGg|vfr|Vfr|ngt|bot|nGt|nis|niv|Rsh|rsh|nle|nlE|bne|Bfr|bfr|nLl|nlt|nLt|Bcy|bcy|not|Not|rlm|wfr|Wfr|npr|nsc|num|ocy|ast|Ocy|ofr|xfr|Xfr|Ofr|ogt|ohm|apE|olt|Rho|ape|rho|Rfr|rfr|ord|REG|ang|reg|orv|And|and|AMP|Rcy|amp|Afr|ycy|Ycy|yen|yfr|Yfr|rcy|par|pcy|Pcy|pfr|Pfr|phi|Phi|afr|Acy|acy|zcy|Zcy|piv|acE|acd|zfr|Zfr|pre|prE|psi|Psi|qfr|Qfr|zwj|Or|ge|Gg|gt|gg|el|oS|lt|Lt|LT|Re|lg|gl|eg|ne|Im|it|le|DD|wp|wr|nu|Nu|dd|lE|Sc|sc|pi|Pi|ee|af|ll|Ll|rx|gE|xi|pm|Xi|ic|pr|Pr|in|ni|mp|mu|ac|Mu|or|ap|Gt|GT|ii);|&(Aacute|Agrave|Atilde|Ccedil|Eacute|Egrave|Iacute|Igrave|Ntilde|Oacute|Ograve|Oslash|Otilde|Uacute|Ugrave|Yacute|aacute|agrave|atilde|brvbar|ccedil|curren|divide|eacute|egrave|frac12|frac14|frac34|iacute|igrave|iquest|middot|ntilde|oacute|ograve|oslash|otilde|plusmn|uacute|ugrave|yacute|AElig|Acirc|Aring|Ecirc|Icirc|Ocirc|THORN|Ucirc|acirc|acute|aelig|aring|cedil|ecirc|icirc|iexcl|laquo|micro|ocirc|pound|raquo|szlig|thorn|times|ucirc|Auml|COPY|Euml|Iuml|Ouml|QUOT|Uuml|auml|cent|copy|euml|iuml|macr|nbsp|ordf|ordm|ouml|para|quot|sect|sup1|sup2|sup3|uuml|yuml|AMP|ETH|REG|amp|deg|eth|not|reg|shy|uml|yen|GT|LT|gt|lt)(?!;)([=a-zA-Z0-9]?)|&#([0-9]+)(;?)|&#[xX]([a-fA-F0-9]+)(;?)|&([0-9a-zA-Z]+)/g;
+  	var decodeMap = {'aacute':'\xE1','Aacute':'\xC1','abreve':'\u0103','Abreve':'\u0102','ac':'\u223E','acd':'\u223F','acE':'\u223E\u0333','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','acy':'\u0430','Acy':'\u0410','aelig':'\xE6','AElig':'\xC6','af':'\u2061','afr':'\uD835\uDD1E','Afr':'\uD835\uDD04','agrave':'\xE0','Agrave':'\xC0','alefsym':'\u2135','aleph':'\u2135','alpha':'\u03B1','Alpha':'\u0391','amacr':'\u0101','Amacr':'\u0100','amalg':'\u2A3F','amp':'&','AMP':'&','and':'\u2227','And':'\u2A53','andand':'\u2A55','andd':'\u2A5C','andslope':'\u2A58','andv':'\u2A5A','ang':'\u2220','ange':'\u29A4','angle':'\u2220','angmsd':'\u2221','angmsdaa':'\u29A8','angmsdab':'\u29A9','angmsdac':'\u29AA','angmsdad':'\u29AB','angmsdae':'\u29AC','angmsdaf':'\u29AD','angmsdag':'\u29AE','angmsdah':'\u29AF','angrt':'\u221F','angrtvb':'\u22BE','angrtvbd':'\u299D','angsph':'\u2222','angst':'\xC5','angzarr':'\u237C','aogon':'\u0105','Aogon':'\u0104','aopf':'\uD835\uDD52','Aopf':'\uD835\uDD38','ap':'\u2248','apacir':'\u2A6F','ape':'\u224A','apE':'\u2A70','apid':'\u224B','apos':'\'','ApplyFunction':'\u2061','approx':'\u2248','approxeq':'\u224A','aring':'\xE5','Aring':'\xC5','ascr':'\uD835\uDCB6','Ascr':'\uD835\uDC9C','Assign':'\u2254','ast':'*','asymp':'\u2248','asympeq':'\u224D','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','awconint':'\u2233','awint':'\u2A11','backcong':'\u224C','backepsilon':'\u03F6','backprime':'\u2035','backsim':'\u223D','backsimeq':'\u22CD','Backslash':'\u2216','Barv':'\u2AE7','barvee':'\u22BD','barwed':'\u2305','Barwed':'\u2306','barwedge':'\u2305','bbrk':'\u23B5','bbrktbrk':'\u23B6','bcong':'\u224C','bcy':'\u0431','Bcy':'\u0411','bdquo':'\u201E','becaus':'\u2235','because':'\u2235','Because':'\u2235','bemptyv':'\u29B0','bepsi':'\u03F6','bernou':'\u212C','Bernoullis':'\u212C','beta':'\u03B2','Beta':'\u0392','beth':'\u2136','between':'\u226C','bfr':'\uD835\uDD1F','Bfr':'\uD835\uDD05','bigcap':'\u22C2','bigcirc':'\u25EF','bigcup':'\u22C3','bigodot':'\u2A00','bigoplus':'\u2A01','bigotimes':'\u2A02','bigsqcup':'\u2A06','bigstar':'\u2605','bigtriangledown':'\u25BD','bigtriangleup':'\u25B3','biguplus':'\u2A04','bigvee':'\u22C1','bigwedge':'\u22C0','bkarow':'\u290D','blacklozenge':'\u29EB','blacksquare':'\u25AA','blacktriangle':'\u25B4','blacktriangledown':'\u25BE','blacktriangleleft':'\u25C2','blacktriangleright':'\u25B8','blank':'\u2423','blk12':'\u2592','blk14':'\u2591','blk34':'\u2593','block':'\u2588','bne':'=\u20E5','bnequiv':'\u2261\u20E5','bnot':'\u2310','bNot':'\u2AED','bopf':'\uD835\uDD53','Bopf':'\uD835\uDD39','bot':'\u22A5','bottom':'\u22A5','bowtie':'\u22C8','boxbox':'\u29C9','boxdl':'\u2510','boxdL':'\u2555','boxDl':'\u2556','boxDL':'\u2557','boxdr':'\u250C','boxdR':'\u2552','boxDr':'\u2553','boxDR':'\u2554','boxh':'\u2500','boxH':'\u2550','boxhd':'\u252C','boxhD':'\u2565','boxHd':'\u2564','boxHD':'\u2566','boxhu':'\u2534','boxhU':'\u2568','boxHu':'\u2567','boxHU':'\u2569','boxminus':'\u229F','boxplus':'\u229E','boxtimes':'\u22A0','boxul':'\u2518','boxuL':'\u255B','boxUl':'\u255C','boxUL':'\u255D','boxur':'\u2514','boxuR':'\u2558','boxUr':'\u2559','boxUR':'\u255A','boxv':'\u2502','boxV':'\u2551','boxvh':'\u253C','boxvH':'\u256A','boxVh':'\u256B','boxVH':'\u256C','boxvl':'\u2524','boxvL':'\u2561','boxVl':'\u2562','boxVL':'\u2563','boxvr':'\u251C','boxvR':'\u255E','boxVr':'\u255F','boxVR':'\u2560','bprime':'\u2035','breve':'\u02D8','Breve':'\u02D8','brvbar':'\xA6','bscr':'\uD835\uDCB7','Bscr':'\u212C','bsemi':'\u204F','bsim':'\u223D','bsime':'\u22CD','bsol':'\\','bsolb':'\u29C5','bsolhsub':'\u27C8','bull':'\u2022','bullet':'\u2022','bump':'\u224E','bumpe':'\u224F','bumpE':'\u2AAE','bumpeq':'\u224F','Bumpeq':'\u224E','cacute':'\u0107','Cacute':'\u0106','cap':'\u2229','Cap':'\u22D2','capand':'\u2A44','capbrcup':'\u2A49','capcap':'\u2A4B','capcup':'\u2A47','capdot':'\u2A40','CapitalDifferentialD':'\u2145','caps':'\u2229\uFE00','caret':'\u2041','caron':'\u02C7','Cayleys':'\u212D','ccaps':'\u2A4D','ccaron':'\u010D','Ccaron':'\u010C','ccedil':'\xE7','Ccedil':'\xC7','ccirc':'\u0109','Ccirc':'\u0108','Cconint':'\u2230','ccups':'\u2A4C','ccupssm':'\u2A50','cdot':'\u010B','Cdot':'\u010A','cedil':'\xB8','Cedilla':'\xB8','cemptyv':'\u29B2','cent':'\xA2','centerdot':'\xB7','CenterDot':'\xB7','cfr':'\uD835\uDD20','Cfr':'\u212D','chcy':'\u0447','CHcy':'\u0427','check':'\u2713','checkmark':'\u2713','chi':'\u03C7','Chi':'\u03A7','cir':'\u25CB','circ':'\u02C6','circeq':'\u2257','circlearrowleft':'\u21BA','circlearrowright':'\u21BB','circledast':'\u229B','circledcirc':'\u229A','circleddash':'\u229D','CircleDot':'\u2299','circledR':'\xAE','circledS':'\u24C8','CircleMinus':'\u2296','CirclePlus':'\u2295','CircleTimes':'\u2297','cire':'\u2257','cirE':'\u29C3','cirfnint':'\u2A10','cirmid':'\u2AEF','cirscir':'\u29C2','ClockwiseContourIntegral':'\u2232','CloseCurlyDoubleQuote':'\u201D','CloseCurlyQuote':'\u2019','clubs':'\u2663','clubsuit':'\u2663','colon':':','Colon':'\u2237','colone':'\u2254','Colone':'\u2A74','coloneq':'\u2254','comma':',','commat':'@','comp':'\u2201','compfn':'\u2218','complement':'\u2201','complexes':'\u2102','cong':'\u2245','congdot':'\u2A6D','Congruent':'\u2261','conint':'\u222E','Conint':'\u222F','ContourIntegral':'\u222E','copf':'\uD835\uDD54','Copf':'\u2102','coprod':'\u2210','Coproduct':'\u2210','copy':'\xA9','COPY':'\xA9','copysr':'\u2117','CounterClockwiseContourIntegral':'\u2233','crarr':'\u21B5','cross':'\u2717','Cross':'\u2A2F','cscr':'\uD835\uDCB8','Cscr':'\uD835\uDC9E','csub':'\u2ACF','csube':'\u2AD1','csup':'\u2AD0','csupe':'\u2AD2','ctdot':'\u22EF','cudarrl':'\u2938','cudarrr':'\u2935','cuepr':'\u22DE','cuesc':'\u22DF','cularr':'\u21B6','cularrp':'\u293D','cup':'\u222A','Cup':'\u22D3','cupbrcap':'\u2A48','cupcap':'\u2A46','CupCap':'\u224D','cupcup':'\u2A4A','cupdot':'\u228D','cupor':'\u2A45','cups':'\u222A\uFE00','curarr':'\u21B7','curarrm':'\u293C','curlyeqprec':'\u22DE','curlyeqsucc':'\u22DF','curlyvee':'\u22CE','curlywedge':'\u22CF','curren':'\xA4','curvearrowleft':'\u21B6','curvearrowright':'\u21B7','cuvee':'\u22CE','cuwed':'\u22CF','cwconint':'\u2232','cwint':'\u2231','cylcty':'\u232D','dagger':'\u2020','Dagger':'\u2021','daleth':'\u2138','darr':'\u2193','dArr':'\u21D3','Darr':'\u21A1','dash':'\u2010','dashv':'\u22A3','Dashv':'\u2AE4','dbkarow':'\u290F','dblac':'\u02DD','dcaron':'\u010F','Dcaron':'\u010E','dcy':'\u0434','Dcy':'\u0414','dd':'\u2146','DD':'\u2145','ddagger':'\u2021','ddarr':'\u21CA','DDotrahd':'\u2911','ddotseq':'\u2A77','deg':'\xB0','Del':'\u2207','delta':'\u03B4','Delta':'\u0394','demptyv':'\u29B1','dfisht':'\u297F','dfr':'\uD835\uDD21','Dfr':'\uD835\uDD07','dHar':'\u2965','dharl':'\u21C3','dharr':'\u21C2','DiacriticalAcute':'\xB4','DiacriticalDot':'\u02D9','DiacriticalDoubleAcute':'\u02DD','DiacriticalGrave':'`','DiacriticalTilde':'\u02DC','diam':'\u22C4','diamond':'\u22C4','Diamond':'\u22C4','diamondsuit':'\u2666','diams':'\u2666','die':'\xA8','DifferentialD':'\u2146','digamma':'\u03DD','disin':'\u22F2','div':'\xF7','divide':'\xF7','divideontimes':'\u22C7','divonx':'\u22C7','djcy':'\u0452','DJcy':'\u0402','dlcorn':'\u231E','dlcrop':'\u230D','dollar':'$','dopf':'\uD835\uDD55','Dopf':'\uD835\uDD3B','dot':'\u02D9','Dot':'\xA8','DotDot':'\u20DC','doteq':'\u2250','doteqdot':'\u2251','DotEqual':'\u2250','dotminus':'\u2238','dotplus':'\u2214','dotsquare':'\u22A1','doublebarwedge':'\u2306','DoubleContourIntegral':'\u222F','DoubleDot':'\xA8','DoubleDownArrow':'\u21D3','DoubleLeftArrow':'\u21D0','DoubleLeftRightArrow':'\u21D4','DoubleLeftTee':'\u2AE4','DoubleLongLeftArrow':'\u27F8','DoubleLongLeftRightArrow':'\u27FA','DoubleLongRightArrow':'\u27F9','DoubleRightArrow':'\u21D2','DoubleRightTee':'\u22A8','DoubleUpArrow':'\u21D1','DoubleUpDownArrow':'\u21D5','DoubleVerticalBar':'\u2225','downarrow':'\u2193','Downarrow':'\u21D3','DownArrow':'\u2193','DownArrowBar':'\u2913','DownArrowUpArrow':'\u21F5','DownBreve':'\u0311','downdownarrows':'\u21CA','downharpoonleft':'\u21C3','downharpoonright':'\u21C2','DownLeftRightVector':'\u2950','DownLeftTeeVector':'\u295E','DownLeftVector':'\u21BD','DownLeftVectorBar':'\u2956','DownRightTeeVector':'\u295F','DownRightVector':'\u21C1','DownRightVectorBar':'\u2957','DownTee':'\u22A4','DownTeeArrow':'\u21A7','drbkarow':'\u2910','drcorn':'\u231F','drcrop':'\u230C','dscr':'\uD835\uDCB9','Dscr':'\uD835\uDC9F','dscy':'\u0455','DScy':'\u0405','dsol':'\u29F6','dstrok':'\u0111','Dstrok':'\u0110','dtdot':'\u22F1','dtri':'\u25BF','dtrif':'\u25BE','duarr':'\u21F5','duhar':'\u296F','dwangle':'\u29A6','dzcy':'\u045F','DZcy':'\u040F','dzigrarr':'\u27FF','eacute':'\xE9','Eacute':'\xC9','easter':'\u2A6E','ecaron':'\u011B','Ecaron':'\u011A','ecir':'\u2256','ecirc':'\xEA','Ecirc':'\xCA','ecolon':'\u2255','ecy':'\u044D','Ecy':'\u042D','eDDot':'\u2A77','edot':'\u0117','eDot':'\u2251','Edot':'\u0116','ee':'\u2147','efDot':'\u2252','efr':'\uD835\uDD22','Efr':'\uD835\uDD08','eg':'\u2A9A','egrave':'\xE8','Egrave':'\xC8','egs':'\u2A96','egsdot':'\u2A98','el':'\u2A99','Element':'\u2208','elinters':'\u23E7','ell':'\u2113','els':'\u2A95','elsdot':'\u2A97','emacr':'\u0113','Emacr':'\u0112','empty':'\u2205','emptyset':'\u2205','EmptySmallSquare':'\u25FB','emptyv':'\u2205','EmptyVerySmallSquare':'\u25AB','emsp':'\u2003','emsp13':'\u2004','emsp14':'\u2005','eng':'\u014B','ENG':'\u014A','ensp':'\u2002','eogon':'\u0119','Eogon':'\u0118','eopf':'\uD835\uDD56','Eopf':'\uD835\uDD3C','epar':'\u22D5','eparsl':'\u29E3','eplus':'\u2A71','epsi':'\u03B5','epsilon':'\u03B5','Epsilon':'\u0395','epsiv':'\u03F5','eqcirc':'\u2256','eqcolon':'\u2255','eqsim':'\u2242','eqslantgtr':'\u2A96','eqslantless':'\u2A95','Equal':'\u2A75','equals':'=','EqualTilde':'\u2242','equest':'\u225F','Equilibrium':'\u21CC','equiv':'\u2261','equivDD':'\u2A78','eqvparsl':'\u29E5','erarr':'\u2971','erDot':'\u2253','escr':'\u212F','Escr':'\u2130','esdot':'\u2250','esim':'\u2242','Esim':'\u2A73','eta':'\u03B7','Eta':'\u0397','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','euro':'\u20AC','excl':'!','exist':'\u2203','Exists':'\u2203','expectation':'\u2130','exponentiale':'\u2147','ExponentialE':'\u2147','fallingdotseq':'\u2252','fcy':'\u0444','Fcy':'\u0424','female':'\u2640','ffilig':'\uFB03','fflig':'\uFB00','ffllig':'\uFB04','ffr':'\uD835\uDD23','Ffr':'\uD835\uDD09','filig':'\uFB01','FilledSmallSquare':'\u25FC','FilledVerySmallSquare':'\u25AA','fjlig':'fj','flat':'\u266D','fllig':'\uFB02','fltns':'\u25B1','fnof':'\u0192','fopf':'\uD835\uDD57','Fopf':'\uD835\uDD3D','forall':'\u2200','ForAll':'\u2200','fork':'\u22D4','forkv':'\u2AD9','Fouriertrf':'\u2131','fpartint':'\u2A0D','frac12':'\xBD','frac13':'\u2153','frac14':'\xBC','frac15':'\u2155','frac16':'\u2159','frac18':'\u215B','frac23':'\u2154','frac25':'\u2156','frac34':'\xBE','frac35':'\u2157','frac38':'\u215C','frac45':'\u2158','frac56':'\u215A','frac58':'\u215D','frac78':'\u215E','frasl':'\u2044','frown':'\u2322','fscr':'\uD835\uDCBB','Fscr':'\u2131','gacute':'\u01F5','gamma':'\u03B3','Gamma':'\u0393','gammad':'\u03DD','Gammad':'\u03DC','gap':'\u2A86','gbreve':'\u011F','Gbreve':'\u011E','Gcedil':'\u0122','gcirc':'\u011D','Gcirc':'\u011C','gcy':'\u0433','Gcy':'\u0413','gdot':'\u0121','Gdot':'\u0120','ge':'\u2265','gE':'\u2267','gel':'\u22DB','gEl':'\u2A8C','geq':'\u2265','geqq':'\u2267','geqslant':'\u2A7E','ges':'\u2A7E','gescc':'\u2AA9','gesdot':'\u2A80','gesdoto':'\u2A82','gesdotol':'\u2A84','gesl':'\u22DB\uFE00','gesles':'\u2A94','gfr':'\uD835\uDD24','Gfr':'\uD835\uDD0A','gg':'\u226B','Gg':'\u22D9','ggg':'\u22D9','gimel':'\u2137','gjcy':'\u0453','GJcy':'\u0403','gl':'\u2277','gla':'\u2AA5','glE':'\u2A92','glj':'\u2AA4','gnap':'\u2A8A','gnapprox':'\u2A8A','gne':'\u2A88','gnE':'\u2269','gneq':'\u2A88','gneqq':'\u2269','gnsim':'\u22E7','gopf':'\uD835\uDD58','Gopf':'\uD835\uDD3E','grave':'`','GreaterEqual':'\u2265','GreaterEqualLess':'\u22DB','GreaterFullEqual':'\u2267','GreaterGreater':'\u2AA2','GreaterLess':'\u2277','GreaterSlantEqual':'\u2A7E','GreaterTilde':'\u2273','gscr':'\u210A','Gscr':'\uD835\uDCA2','gsim':'\u2273','gsime':'\u2A8E','gsiml':'\u2A90','gt':'>','Gt':'\u226B','GT':'>','gtcc':'\u2AA7','gtcir':'\u2A7A','gtdot':'\u22D7','gtlPar':'\u2995','gtquest':'\u2A7C','gtrapprox':'\u2A86','gtrarr':'\u2978','gtrdot':'\u22D7','gtreqless':'\u22DB','gtreqqless':'\u2A8C','gtrless':'\u2277','gtrsim':'\u2273','gvertneqq':'\u2269\uFE00','gvnE':'\u2269\uFE00','Hacek':'\u02C7','hairsp':'\u200A','half':'\xBD','hamilt':'\u210B','hardcy':'\u044A','HARDcy':'\u042A','harr':'\u2194','hArr':'\u21D4','harrcir':'\u2948','harrw':'\u21AD','Hat':'^','hbar':'\u210F','hcirc':'\u0125','Hcirc':'\u0124','hearts':'\u2665','heartsuit':'\u2665','hellip':'\u2026','hercon':'\u22B9','hfr':'\uD835\uDD25','Hfr':'\u210C','HilbertSpace':'\u210B','hksearow':'\u2925','hkswarow':'\u2926','hoarr':'\u21FF','homtht':'\u223B','hookleftarrow':'\u21A9','hookrightarrow':'\u21AA','hopf':'\uD835\uDD59','Hopf':'\u210D','horbar':'\u2015','HorizontalLine':'\u2500','hscr':'\uD835\uDCBD','Hscr':'\u210B','hslash':'\u210F','hstrok':'\u0127','Hstrok':'\u0126','HumpDownHump':'\u224E','HumpEqual':'\u224F','hybull':'\u2043','hyphen':'\u2010','iacute':'\xED','Iacute':'\xCD','ic':'\u2063','icirc':'\xEE','Icirc':'\xCE','icy':'\u0438','Icy':'\u0418','Idot':'\u0130','iecy':'\u0435','IEcy':'\u0415','iexcl':'\xA1','iff':'\u21D4','ifr':'\uD835\uDD26','Ifr':'\u2111','igrave':'\xEC','Igrave':'\xCC','ii':'\u2148','iiiint':'\u2A0C','iiint':'\u222D','iinfin':'\u29DC','iiota':'\u2129','ijlig':'\u0133','IJlig':'\u0132','Im':'\u2111','imacr':'\u012B','Imacr':'\u012A','image':'\u2111','ImaginaryI':'\u2148','imagline':'\u2110','imagpart':'\u2111','imath':'\u0131','imof':'\u22B7','imped':'\u01B5','Implies':'\u21D2','in':'\u2208','incare':'\u2105','infin':'\u221E','infintie':'\u29DD','inodot':'\u0131','int':'\u222B','Int':'\u222C','intcal':'\u22BA','integers':'\u2124','Integral':'\u222B','intercal':'\u22BA','Intersection':'\u22C2','intlarhk':'\u2A17','intprod':'\u2A3C','InvisibleComma':'\u2063','InvisibleTimes':'\u2062','iocy':'\u0451','IOcy':'\u0401','iogon':'\u012F','Iogon':'\u012E','iopf':'\uD835\uDD5A','Iopf':'\uD835\uDD40','iota':'\u03B9','Iota':'\u0399','iprod':'\u2A3C','iquest':'\xBF','iscr':'\uD835\uDCBE','Iscr':'\u2110','isin':'\u2208','isindot':'\u22F5','isinE':'\u22F9','isins':'\u22F4','isinsv':'\u22F3','isinv':'\u2208','it':'\u2062','itilde':'\u0129','Itilde':'\u0128','iukcy':'\u0456','Iukcy':'\u0406','iuml':'\xEF','Iuml':'\xCF','jcirc':'\u0135','Jcirc':'\u0134','jcy':'\u0439','Jcy':'\u0419','jfr':'\uD835\uDD27','Jfr':'\uD835\uDD0D','jmath':'\u0237','jopf':'\uD835\uDD5B','Jopf':'\uD835\uDD41','jscr':'\uD835\uDCBF','Jscr':'\uD835\uDCA5','jsercy':'\u0458','Jsercy':'\u0408','jukcy':'\u0454','Jukcy':'\u0404','kappa':'\u03BA','Kappa':'\u039A','kappav':'\u03F0','kcedil':'\u0137','Kcedil':'\u0136','kcy':'\u043A','Kcy':'\u041A','kfr':'\uD835\uDD28','Kfr':'\uD835\uDD0E','kgreen':'\u0138','khcy':'\u0445','KHcy':'\u0425','kjcy':'\u045C','KJcy':'\u040C','kopf':'\uD835\uDD5C','Kopf':'\uD835\uDD42','kscr':'\uD835\uDCC0','Kscr':'\uD835\uDCA6','lAarr':'\u21DA','lacute':'\u013A','Lacute':'\u0139','laemptyv':'\u29B4','lagran':'\u2112','lambda':'\u03BB','Lambda':'\u039B','lang':'\u27E8','Lang':'\u27EA','langd':'\u2991','langle':'\u27E8','lap':'\u2A85','Laplacetrf':'\u2112','laquo':'\xAB','larr':'\u2190','lArr':'\u21D0','Larr':'\u219E','larrb':'\u21E4','larrbfs':'\u291F','larrfs':'\u291D','larrhk':'\u21A9','larrlp':'\u21AB','larrpl':'\u2939','larrsim':'\u2973','larrtl':'\u21A2','lat':'\u2AAB','latail':'\u2919','lAtail':'\u291B','late':'\u2AAD','lates':'\u2AAD\uFE00','lbarr':'\u290C','lBarr':'\u290E','lbbrk':'\u2772','lbrace':'{','lbrack':'[','lbrke':'\u298B','lbrksld':'\u298F','lbrkslu':'\u298D','lcaron':'\u013E','Lcaron':'\u013D','lcedil':'\u013C','Lcedil':'\u013B','lceil':'\u2308','lcub':'{','lcy':'\u043B','Lcy':'\u041B','ldca':'\u2936','ldquo':'\u201C','ldquor':'\u201E','ldrdhar':'\u2967','ldrushar':'\u294B','ldsh':'\u21B2','le':'\u2264','lE':'\u2266','LeftAngleBracket':'\u27E8','leftarrow':'\u2190','Leftarrow':'\u21D0','LeftArrow':'\u2190','LeftArrowBar':'\u21E4','LeftArrowRightArrow':'\u21C6','leftarrowtail':'\u21A2','LeftCeiling':'\u2308','LeftDoubleBracket':'\u27E6','LeftDownTeeVector':'\u2961','LeftDownVector':'\u21C3','LeftDownVectorBar':'\u2959','LeftFloor':'\u230A','leftharpoondown':'\u21BD','leftharpoonup':'\u21BC','leftleftarrows':'\u21C7','leftrightarrow':'\u2194','Leftrightarrow':'\u21D4','LeftRightArrow':'\u2194','leftrightarrows':'\u21C6','leftrightharpoons':'\u21CB','leftrightsquigarrow':'\u21AD','LeftRightVector':'\u294E','LeftTee':'\u22A3','LeftTeeArrow':'\u21A4','LeftTeeVector':'\u295A','leftthreetimes':'\u22CB','LeftTriangle':'\u22B2','LeftTriangleBar':'\u29CF','LeftTriangleEqual':'\u22B4','LeftUpDownVector':'\u2951','LeftUpTeeVector':'\u2960','LeftUpVector':'\u21BF','LeftUpVectorBar':'\u2958','LeftVector':'\u21BC','LeftVectorBar':'\u2952','leg':'\u22DA','lEg':'\u2A8B','leq':'\u2264','leqq':'\u2266','leqslant':'\u2A7D','les':'\u2A7D','lescc':'\u2AA8','lesdot':'\u2A7F','lesdoto':'\u2A81','lesdotor':'\u2A83','lesg':'\u22DA\uFE00','lesges':'\u2A93','lessapprox':'\u2A85','lessdot':'\u22D6','lesseqgtr':'\u22DA','lesseqqgtr':'\u2A8B','LessEqualGreater':'\u22DA','LessFullEqual':'\u2266','LessGreater':'\u2276','lessgtr':'\u2276','LessLess':'\u2AA1','lesssim':'\u2272','LessSlantEqual':'\u2A7D','LessTilde':'\u2272','lfisht':'\u297C','lfloor':'\u230A','lfr':'\uD835\uDD29','Lfr':'\uD835\uDD0F','lg':'\u2276','lgE':'\u2A91','lHar':'\u2962','lhard':'\u21BD','lharu':'\u21BC','lharul':'\u296A','lhblk':'\u2584','ljcy':'\u0459','LJcy':'\u0409','ll':'\u226A','Ll':'\u22D8','llarr':'\u21C7','llcorner':'\u231E','Lleftarrow':'\u21DA','llhard':'\u296B','lltri':'\u25FA','lmidot':'\u0140','Lmidot':'\u013F','lmoust':'\u23B0','lmoustache':'\u23B0','lnap':'\u2A89','lnapprox':'\u2A89','lne':'\u2A87','lnE':'\u2268','lneq':'\u2A87','lneqq':'\u2268','lnsim':'\u22E6','loang':'\u27EC','loarr':'\u21FD','lobrk':'\u27E6','longleftarrow':'\u27F5','Longleftarrow':'\u27F8','LongLeftArrow':'\u27F5','longleftrightarrow':'\u27F7','Longleftrightarrow':'\u27FA','LongLeftRightArrow':'\u27F7','longmapsto':'\u27FC','longrightarrow':'\u27F6','Longrightarrow':'\u27F9','LongRightArrow':'\u27F6','looparrowleft':'\u21AB','looparrowright':'\u21AC','lopar':'\u2985','lopf':'\uD835\uDD5D','Lopf':'\uD835\uDD43','loplus':'\u2A2D','lotimes':'\u2A34','lowast':'\u2217','lowbar':'_','LowerLeftArrow':'\u2199','LowerRightArrow':'\u2198','loz':'\u25CA','lozenge':'\u25CA','lozf':'\u29EB','lpar':'(','lparlt':'\u2993','lrarr':'\u21C6','lrcorner':'\u231F','lrhar':'\u21CB','lrhard':'\u296D','lrm':'\u200E','lrtri':'\u22BF','lsaquo':'\u2039','lscr':'\uD835\uDCC1','Lscr':'\u2112','lsh':'\u21B0','Lsh':'\u21B0','lsim':'\u2272','lsime':'\u2A8D','lsimg':'\u2A8F','lsqb':'[','lsquo':'\u2018','lsquor':'\u201A','lstrok':'\u0142','Lstrok':'\u0141','lt':'<','Lt':'\u226A','LT':'<','ltcc':'\u2AA6','ltcir':'\u2A79','ltdot':'\u22D6','lthree':'\u22CB','ltimes':'\u22C9','ltlarr':'\u2976','ltquest':'\u2A7B','ltri':'\u25C3','ltrie':'\u22B4','ltrif':'\u25C2','ltrPar':'\u2996','lurdshar':'\u294A','luruhar':'\u2966','lvertneqq':'\u2268\uFE00','lvnE':'\u2268\uFE00','macr':'\xAF','male':'\u2642','malt':'\u2720','maltese':'\u2720','map':'\u21A6','Map':'\u2905','mapsto':'\u21A6','mapstodown':'\u21A7','mapstoleft':'\u21A4','mapstoup':'\u21A5','marker':'\u25AE','mcomma':'\u2A29','mcy':'\u043C','Mcy':'\u041C','mdash':'\u2014','mDDot':'\u223A','measuredangle':'\u2221','MediumSpace':'\u205F','Mellintrf':'\u2133','mfr':'\uD835\uDD2A','Mfr':'\uD835\uDD10','mho':'\u2127','micro':'\xB5','mid':'\u2223','midast':'*','midcir':'\u2AF0','middot':'\xB7','minus':'\u2212','minusb':'\u229F','minusd':'\u2238','minusdu':'\u2A2A','MinusPlus':'\u2213','mlcp':'\u2ADB','mldr':'\u2026','mnplus':'\u2213','models':'\u22A7','mopf':'\uD835\uDD5E','Mopf':'\uD835\uDD44','mp':'\u2213','mscr':'\uD835\uDCC2','Mscr':'\u2133','mstpos':'\u223E','mu':'\u03BC','Mu':'\u039C','multimap':'\u22B8','mumap':'\u22B8','nabla':'\u2207','nacute':'\u0144','Nacute':'\u0143','nang':'\u2220\u20D2','nap':'\u2249','napE':'\u2A70\u0338','napid':'\u224B\u0338','napos':'\u0149','napprox':'\u2249','natur':'\u266E','natural':'\u266E','naturals':'\u2115','nbsp':'\xA0','nbump':'\u224E\u0338','nbumpe':'\u224F\u0338','ncap':'\u2A43','ncaron':'\u0148','Ncaron':'\u0147','ncedil':'\u0146','Ncedil':'\u0145','ncong':'\u2247','ncongdot':'\u2A6D\u0338','ncup':'\u2A42','ncy':'\u043D','Ncy':'\u041D','ndash':'\u2013','ne':'\u2260','nearhk':'\u2924','nearr':'\u2197','neArr':'\u21D7','nearrow':'\u2197','nedot':'\u2250\u0338','NegativeMediumSpace':'\u200B','NegativeThickSpace':'\u200B','NegativeThinSpace':'\u200B','NegativeVeryThinSpace':'\u200B','nequiv':'\u2262','nesear':'\u2928','nesim':'\u2242\u0338','NestedGreaterGreater':'\u226B','NestedLessLess':'\u226A','NewLine':'\n','nexist':'\u2204','nexists':'\u2204','nfr':'\uD835\uDD2B','Nfr':'\uD835\uDD11','nge':'\u2271','ngE':'\u2267\u0338','ngeq':'\u2271','ngeqq':'\u2267\u0338','ngeqslant':'\u2A7E\u0338','nges':'\u2A7E\u0338','nGg':'\u22D9\u0338','ngsim':'\u2275','ngt':'\u226F','nGt':'\u226B\u20D2','ngtr':'\u226F','nGtv':'\u226B\u0338','nharr':'\u21AE','nhArr':'\u21CE','nhpar':'\u2AF2','ni':'\u220B','nis':'\u22FC','nisd':'\u22FA','niv':'\u220B','njcy':'\u045A','NJcy':'\u040A','nlarr':'\u219A','nlArr':'\u21CD','nldr':'\u2025','nle':'\u2270','nlE':'\u2266\u0338','nleftarrow':'\u219A','nLeftarrow':'\u21CD','nleftrightarrow':'\u21AE','nLeftrightarrow':'\u21CE','nleq':'\u2270','nleqq':'\u2266\u0338','nleqslant':'\u2A7D\u0338','nles':'\u2A7D\u0338','nless':'\u226E','nLl':'\u22D8\u0338','nlsim':'\u2274','nlt':'\u226E','nLt':'\u226A\u20D2','nltri':'\u22EA','nltrie':'\u22EC','nLtv':'\u226A\u0338','nmid':'\u2224','NoBreak':'\u2060','NonBreakingSpace':'\xA0','nopf':'\uD835\uDD5F','Nopf':'\u2115','not':'\xAC','Not':'\u2AEC','NotCongruent':'\u2262','NotCupCap':'\u226D','NotDoubleVerticalBar':'\u2226','NotElement':'\u2209','NotEqual':'\u2260','NotEqualTilde':'\u2242\u0338','NotExists':'\u2204','NotGreater':'\u226F','NotGreaterEqual':'\u2271','NotGreaterFullEqual':'\u2267\u0338','NotGreaterGreater':'\u226B\u0338','NotGreaterLess':'\u2279','NotGreaterSlantEqual':'\u2A7E\u0338','NotGreaterTilde':'\u2275','NotHumpDownHump':'\u224E\u0338','NotHumpEqual':'\u224F\u0338','notin':'\u2209','notindot':'\u22F5\u0338','notinE':'\u22F9\u0338','notinva':'\u2209','notinvb':'\u22F7','notinvc':'\u22F6','NotLeftTriangle':'\u22EA','NotLeftTriangleBar':'\u29CF\u0338','NotLeftTriangleEqual':'\u22EC','NotLess':'\u226E','NotLessEqual':'\u2270','NotLessGreater':'\u2278','NotLessLess':'\u226A\u0338','NotLessSlantEqual':'\u2A7D\u0338','NotLessTilde':'\u2274','NotNestedGreaterGreater':'\u2AA2\u0338','NotNestedLessLess':'\u2AA1\u0338','notni':'\u220C','notniva':'\u220C','notnivb':'\u22FE','notnivc':'\u22FD','NotPrecedes':'\u2280','NotPrecedesEqual':'\u2AAF\u0338','NotPrecedesSlantEqual':'\u22E0','NotReverseElement':'\u220C','NotRightTriangle':'\u22EB','NotRightTriangleBar':'\u29D0\u0338','NotRightTriangleEqual':'\u22ED','NotSquareSubset':'\u228F\u0338','NotSquareSubsetEqual':'\u22E2','NotSquareSuperset':'\u2290\u0338','NotSquareSupersetEqual':'\u22E3','NotSubset':'\u2282\u20D2','NotSubsetEqual':'\u2288','NotSucceeds':'\u2281','NotSucceedsEqual':'\u2AB0\u0338','NotSucceedsSlantEqual':'\u22E1','NotSucceedsTilde':'\u227F\u0338','NotSuperset':'\u2283\u20D2','NotSupersetEqual':'\u2289','NotTilde':'\u2241','NotTildeEqual':'\u2244','NotTildeFullEqual':'\u2247','NotTildeTilde':'\u2249','NotVerticalBar':'\u2224','npar':'\u2226','nparallel':'\u2226','nparsl':'\u2AFD\u20E5','npart':'\u2202\u0338','npolint':'\u2A14','npr':'\u2280','nprcue':'\u22E0','npre':'\u2AAF\u0338','nprec':'\u2280','npreceq':'\u2AAF\u0338','nrarr':'\u219B','nrArr':'\u21CF','nrarrc':'\u2933\u0338','nrarrw':'\u219D\u0338','nrightarrow':'\u219B','nRightarrow':'\u21CF','nrtri':'\u22EB','nrtrie':'\u22ED','nsc':'\u2281','nsccue':'\u22E1','nsce':'\u2AB0\u0338','nscr':'\uD835\uDCC3','Nscr':'\uD835\uDCA9','nshortmid':'\u2224','nshortparallel':'\u2226','nsim':'\u2241','nsime':'\u2244','nsimeq':'\u2244','nsmid':'\u2224','nspar':'\u2226','nsqsube':'\u22E2','nsqsupe':'\u22E3','nsub':'\u2284','nsube':'\u2288','nsubE':'\u2AC5\u0338','nsubset':'\u2282\u20D2','nsubseteq':'\u2288','nsubseteqq':'\u2AC5\u0338','nsucc':'\u2281','nsucceq':'\u2AB0\u0338','nsup':'\u2285','nsupe':'\u2289','nsupE':'\u2AC6\u0338','nsupset':'\u2283\u20D2','nsupseteq':'\u2289','nsupseteqq':'\u2AC6\u0338','ntgl':'\u2279','ntilde':'\xF1','Ntilde':'\xD1','ntlg':'\u2278','ntriangleleft':'\u22EA','ntrianglelefteq':'\u22EC','ntriangleright':'\u22EB','ntrianglerighteq':'\u22ED','nu':'\u03BD','Nu':'\u039D','num':'#','numero':'\u2116','numsp':'\u2007','nvap':'\u224D\u20D2','nvdash':'\u22AC','nvDash':'\u22AD','nVdash':'\u22AE','nVDash':'\u22AF','nvge':'\u2265\u20D2','nvgt':'>\u20D2','nvHarr':'\u2904','nvinfin':'\u29DE','nvlArr':'\u2902','nvle':'\u2264\u20D2','nvlt':'<\u20D2','nvltrie':'\u22B4\u20D2','nvrArr':'\u2903','nvrtrie':'\u22B5\u20D2','nvsim':'\u223C\u20D2','nwarhk':'\u2923','nwarr':'\u2196','nwArr':'\u21D6','nwarrow':'\u2196','nwnear':'\u2927','oacute':'\xF3','Oacute':'\xD3','oast':'\u229B','ocir':'\u229A','ocirc':'\xF4','Ocirc':'\xD4','ocy':'\u043E','Ocy':'\u041E','odash':'\u229D','odblac':'\u0151','Odblac':'\u0150','odiv':'\u2A38','odot':'\u2299','odsold':'\u29BC','oelig':'\u0153','OElig':'\u0152','ofcir':'\u29BF','ofr':'\uD835\uDD2C','Ofr':'\uD835\uDD12','ogon':'\u02DB','ograve':'\xF2','Ograve':'\xD2','ogt':'\u29C1','ohbar':'\u29B5','ohm':'\u03A9','oint':'\u222E','olarr':'\u21BA','olcir':'\u29BE','olcross':'\u29BB','oline':'\u203E','olt':'\u29C0','omacr':'\u014D','Omacr':'\u014C','omega':'\u03C9','Omega':'\u03A9','omicron':'\u03BF','Omicron':'\u039F','omid':'\u29B6','ominus':'\u2296','oopf':'\uD835\uDD60','Oopf':'\uD835\uDD46','opar':'\u29B7','OpenCurlyDoubleQuote':'\u201C','OpenCurlyQuote':'\u2018','operp':'\u29B9','oplus':'\u2295','or':'\u2228','Or':'\u2A54','orarr':'\u21BB','ord':'\u2A5D','order':'\u2134','orderof':'\u2134','ordf':'\xAA','ordm':'\xBA','origof':'\u22B6','oror':'\u2A56','orslope':'\u2A57','orv':'\u2A5B','oS':'\u24C8','oscr':'\u2134','Oscr':'\uD835\uDCAA','oslash':'\xF8','Oslash':'\xD8','osol':'\u2298','otilde':'\xF5','Otilde':'\xD5','otimes':'\u2297','Otimes':'\u2A37','otimesas':'\u2A36','ouml':'\xF6','Ouml':'\xD6','ovbar':'\u233D','OverBar':'\u203E','OverBrace':'\u23DE','OverBracket':'\u23B4','OverParenthesis':'\u23DC','par':'\u2225','para':'\xB6','parallel':'\u2225','parsim':'\u2AF3','parsl':'\u2AFD','part':'\u2202','PartialD':'\u2202','pcy':'\u043F','Pcy':'\u041F','percnt':'%','period':'.','permil':'\u2030','perp':'\u22A5','pertenk':'\u2031','pfr':'\uD835\uDD2D','Pfr':'\uD835\uDD13','phi':'\u03C6','Phi':'\u03A6','phiv':'\u03D5','phmmat':'\u2133','phone':'\u260E','pi':'\u03C0','Pi':'\u03A0','pitchfork':'\u22D4','piv':'\u03D6','planck':'\u210F','planckh':'\u210E','plankv':'\u210F','plus':'+','plusacir':'\u2A23','plusb':'\u229E','pluscir':'\u2A22','plusdo':'\u2214','plusdu':'\u2A25','pluse':'\u2A72','PlusMinus':'\xB1','plusmn':'\xB1','plussim':'\u2A26','plustwo':'\u2A27','pm':'\xB1','Poincareplane':'\u210C','pointint':'\u2A15','popf':'\uD835\uDD61','Popf':'\u2119','pound':'\xA3','pr':'\u227A','Pr':'\u2ABB','prap':'\u2AB7','prcue':'\u227C','pre':'\u2AAF','prE':'\u2AB3','prec':'\u227A','precapprox':'\u2AB7','preccurlyeq':'\u227C','Precedes':'\u227A','PrecedesEqual':'\u2AAF','PrecedesSlantEqual':'\u227C','PrecedesTilde':'\u227E','preceq':'\u2AAF','precnapprox':'\u2AB9','precneqq':'\u2AB5','precnsim':'\u22E8','precsim':'\u227E','prime':'\u2032','Prime':'\u2033','primes':'\u2119','prnap':'\u2AB9','prnE':'\u2AB5','prnsim':'\u22E8','prod':'\u220F','Product':'\u220F','profalar':'\u232E','profline':'\u2312','profsurf':'\u2313','prop':'\u221D','Proportion':'\u2237','Proportional':'\u221D','propto':'\u221D','prsim':'\u227E','prurel':'\u22B0','pscr':'\uD835\uDCC5','Pscr':'\uD835\uDCAB','psi':'\u03C8','Psi':'\u03A8','puncsp':'\u2008','qfr':'\uD835\uDD2E','Qfr':'\uD835\uDD14','qint':'\u2A0C','qopf':'\uD835\uDD62','Qopf':'\u211A','qprime':'\u2057','qscr':'\uD835\uDCC6','Qscr':'\uD835\uDCAC','quaternions':'\u210D','quatint':'\u2A16','quest':'?','questeq':'\u225F','quot':'"','QUOT':'"','rAarr':'\u21DB','race':'\u223D\u0331','racute':'\u0155','Racute':'\u0154','radic':'\u221A','raemptyv':'\u29B3','rang':'\u27E9','Rang':'\u27EB','rangd':'\u2992','range':'\u29A5','rangle':'\u27E9','raquo':'\xBB','rarr':'\u2192','rArr':'\u21D2','Rarr':'\u21A0','rarrap':'\u2975','rarrb':'\u21E5','rarrbfs':'\u2920','rarrc':'\u2933','rarrfs':'\u291E','rarrhk':'\u21AA','rarrlp':'\u21AC','rarrpl':'\u2945','rarrsim':'\u2974','rarrtl':'\u21A3','Rarrtl':'\u2916','rarrw':'\u219D','ratail':'\u291A','rAtail':'\u291C','ratio':'\u2236','rationals':'\u211A','rbarr':'\u290D','rBarr':'\u290F','RBarr':'\u2910','rbbrk':'\u2773','rbrace':'}','rbrack':']','rbrke':'\u298C','rbrksld':'\u298E','rbrkslu':'\u2990','rcaron':'\u0159','Rcaron':'\u0158','rcedil':'\u0157','Rcedil':'\u0156','rceil':'\u2309','rcub':'}','rcy':'\u0440','Rcy':'\u0420','rdca':'\u2937','rdldhar':'\u2969','rdquo':'\u201D','rdquor':'\u201D','rdsh':'\u21B3','Re':'\u211C','real':'\u211C','realine':'\u211B','realpart':'\u211C','reals':'\u211D','rect':'\u25AD','reg':'\xAE','REG':'\xAE','ReverseElement':'\u220B','ReverseEquilibrium':'\u21CB','ReverseUpEquilibrium':'\u296F','rfisht':'\u297D','rfloor':'\u230B','rfr':'\uD835\uDD2F','Rfr':'\u211C','rHar':'\u2964','rhard':'\u21C1','rharu':'\u21C0','rharul':'\u296C','rho':'\u03C1','Rho':'\u03A1','rhov':'\u03F1','RightAngleBracket':'\u27E9','rightarrow':'\u2192','Rightarrow':'\u21D2','RightArrow':'\u2192','RightArrowBar':'\u21E5','RightArrowLeftArrow':'\u21C4','rightarrowtail':'\u21A3','RightCeiling':'\u2309','RightDoubleBracket':'\u27E7','RightDownTeeVector':'\u295D','RightDownVector':'\u21C2','RightDownVectorBar':'\u2955','RightFloor':'\u230B','rightharpoondown':'\u21C1','rightharpoonup':'\u21C0','rightleftarrows':'\u21C4','rightleftharpoons':'\u21CC','rightrightarrows':'\u21C9','rightsquigarrow':'\u219D','RightTee':'\u22A2','RightTeeArrow':'\u21A6','RightTeeVector':'\u295B','rightthreetimes':'\u22CC','RightTriangle':'\u22B3','RightTriangleBar':'\u29D0','RightTriangleEqual':'\u22B5','RightUpDownVector':'\u294F','RightUpTeeVector':'\u295C','RightUpVector':'\u21BE','RightUpVectorBar':'\u2954','RightVector':'\u21C0','RightVectorBar':'\u2953','ring':'\u02DA','risingdotseq':'\u2253','rlarr':'\u21C4','rlhar':'\u21CC','rlm':'\u200F','rmoust':'\u23B1','rmoustache':'\u23B1','rnmid':'\u2AEE','roang':'\u27ED','roarr':'\u21FE','robrk':'\u27E7','ropar':'\u2986','ropf':'\uD835\uDD63','Ropf':'\u211D','roplus':'\u2A2E','rotimes':'\u2A35','RoundImplies':'\u2970','rpar':')','rpargt':'\u2994','rppolint':'\u2A12','rrarr':'\u21C9','Rrightarrow':'\u21DB','rsaquo':'\u203A','rscr':'\uD835\uDCC7','Rscr':'\u211B','rsh':'\u21B1','Rsh':'\u21B1','rsqb':']','rsquo':'\u2019','rsquor':'\u2019','rthree':'\u22CC','rtimes':'\u22CA','rtri':'\u25B9','rtrie':'\u22B5','rtrif':'\u25B8','rtriltri':'\u29CE','RuleDelayed':'\u29F4','ruluhar':'\u2968','rx':'\u211E','sacute':'\u015B','Sacute':'\u015A','sbquo':'\u201A','sc':'\u227B','Sc':'\u2ABC','scap':'\u2AB8','scaron':'\u0161','Scaron':'\u0160','sccue':'\u227D','sce':'\u2AB0','scE':'\u2AB4','scedil':'\u015F','Scedil':'\u015E','scirc':'\u015D','Scirc':'\u015C','scnap':'\u2ABA','scnE':'\u2AB6','scnsim':'\u22E9','scpolint':'\u2A13','scsim':'\u227F','scy':'\u0441','Scy':'\u0421','sdot':'\u22C5','sdotb':'\u22A1','sdote':'\u2A66','searhk':'\u2925','searr':'\u2198','seArr':'\u21D8','searrow':'\u2198','sect':'\xA7','semi':';','seswar':'\u2929','setminus':'\u2216','setmn':'\u2216','sext':'\u2736','sfr':'\uD835\uDD30','Sfr':'\uD835\uDD16','sfrown':'\u2322','sharp':'\u266F','shchcy':'\u0449','SHCHcy':'\u0429','shcy':'\u0448','SHcy':'\u0428','ShortDownArrow':'\u2193','ShortLeftArrow':'\u2190','shortmid':'\u2223','shortparallel':'\u2225','ShortRightArrow':'\u2192','ShortUpArrow':'\u2191','shy':'\xAD','sigma':'\u03C3','Sigma':'\u03A3','sigmaf':'\u03C2','sigmav':'\u03C2','sim':'\u223C','simdot':'\u2A6A','sime':'\u2243','simeq':'\u2243','simg':'\u2A9E','simgE':'\u2AA0','siml':'\u2A9D','simlE':'\u2A9F','simne':'\u2246','simplus':'\u2A24','simrarr':'\u2972','slarr':'\u2190','SmallCircle':'\u2218','smallsetminus':'\u2216','smashp':'\u2A33','smeparsl':'\u29E4','smid':'\u2223','smile':'\u2323','smt':'\u2AAA','smte':'\u2AAC','smtes':'\u2AAC\uFE00','softcy':'\u044C','SOFTcy':'\u042C','sol':'/','solb':'\u29C4','solbar':'\u233F','sopf':'\uD835\uDD64','Sopf':'\uD835\uDD4A','spades':'\u2660','spadesuit':'\u2660','spar':'\u2225','sqcap':'\u2293','sqcaps':'\u2293\uFE00','sqcup':'\u2294','sqcups':'\u2294\uFE00','Sqrt':'\u221A','sqsub':'\u228F','sqsube':'\u2291','sqsubset':'\u228F','sqsubseteq':'\u2291','sqsup':'\u2290','sqsupe':'\u2292','sqsupset':'\u2290','sqsupseteq':'\u2292','squ':'\u25A1','square':'\u25A1','Square':'\u25A1','SquareIntersection':'\u2293','SquareSubset':'\u228F','SquareSubsetEqual':'\u2291','SquareSuperset':'\u2290','SquareSupersetEqual':'\u2292','SquareUnion':'\u2294','squarf':'\u25AA','squf':'\u25AA','srarr':'\u2192','sscr':'\uD835\uDCC8','Sscr':'\uD835\uDCAE','ssetmn':'\u2216','ssmile':'\u2323','sstarf':'\u22C6','star':'\u2606','Star':'\u22C6','starf':'\u2605','straightepsilon':'\u03F5','straightphi':'\u03D5','strns':'\xAF','sub':'\u2282','Sub':'\u22D0','subdot':'\u2ABD','sube':'\u2286','subE':'\u2AC5','subedot':'\u2AC3','submult':'\u2AC1','subne':'\u228A','subnE':'\u2ACB','subplus':'\u2ABF','subrarr':'\u2979','subset':'\u2282','Subset':'\u22D0','subseteq':'\u2286','subseteqq':'\u2AC5','SubsetEqual':'\u2286','subsetneq':'\u228A','subsetneqq':'\u2ACB','subsim':'\u2AC7','subsub':'\u2AD5','subsup':'\u2AD3','succ':'\u227B','succapprox':'\u2AB8','succcurlyeq':'\u227D','Succeeds':'\u227B','SucceedsEqual':'\u2AB0','SucceedsSlantEqual':'\u227D','SucceedsTilde':'\u227F','succeq':'\u2AB0','succnapprox':'\u2ABA','succneqq':'\u2AB6','succnsim':'\u22E9','succsim':'\u227F','SuchThat':'\u220B','sum':'\u2211','Sum':'\u2211','sung':'\u266A','sup':'\u2283','Sup':'\u22D1','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','supdot':'\u2ABE','supdsub':'\u2AD8','supe':'\u2287','supE':'\u2AC6','supedot':'\u2AC4','Superset':'\u2283','SupersetEqual':'\u2287','suphsol':'\u27C9','suphsub':'\u2AD7','suplarr':'\u297B','supmult':'\u2AC2','supne':'\u228B','supnE':'\u2ACC','supplus':'\u2AC0','supset':'\u2283','Supset':'\u22D1','supseteq':'\u2287','supseteqq':'\u2AC6','supsetneq':'\u228B','supsetneqq':'\u2ACC','supsim':'\u2AC8','supsub':'\u2AD4','supsup':'\u2AD6','swarhk':'\u2926','swarr':'\u2199','swArr':'\u21D9','swarrow':'\u2199','swnwar':'\u292A','szlig':'\xDF','Tab':'\t','target':'\u2316','tau':'\u03C4','Tau':'\u03A4','tbrk':'\u23B4','tcaron':'\u0165','Tcaron':'\u0164','tcedil':'\u0163','Tcedil':'\u0162','tcy':'\u0442','Tcy':'\u0422','tdot':'\u20DB','telrec':'\u2315','tfr':'\uD835\uDD31','Tfr':'\uD835\uDD17','there4':'\u2234','therefore':'\u2234','Therefore':'\u2234','theta':'\u03B8','Theta':'\u0398','thetasym':'\u03D1','thetav':'\u03D1','thickapprox':'\u2248','thicksim':'\u223C','ThickSpace':'\u205F\u200A','thinsp':'\u2009','ThinSpace':'\u2009','thkap':'\u2248','thksim':'\u223C','thorn':'\xFE','THORN':'\xDE','tilde':'\u02DC','Tilde':'\u223C','TildeEqual':'\u2243','TildeFullEqual':'\u2245','TildeTilde':'\u2248','times':'\xD7','timesb':'\u22A0','timesbar':'\u2A31','timesd':'\u2A30','tint':'\u222D','toea':'\u2928','top':'\u22A4','topbot':'\u2336','topcir':'\u2AF1','topf':'\uD835\uDD65','Topf':'\uD835\uDD4B','topfork':'\u2ADA','tosa':'\u2929','tprime':'\u2034','trade':'\u2122','TRADE':'\u2122','triangle':'\u25B5','triangledown':'\u25BF','triangleleft':'\u25C3','trianglelefteq':'\u22B4','triangleq':'\u225C','triangleright':'\u25B9','trianglerighteq':'\u22B5','tridot':'\u25EC','trie':'\u225C','triminus':'\u2A3A','TripleDot':'\u20DB','triplus':'\u2A39','trisb':'\u29CD','tritime':'\u2A3B','trpezium':'\u23E2','tscr':'\uD835\uDCC9','Tscr':'\uD835\uDCAF','tscy':'\u0446','TScy':'\u0426','tshcy':'\u045B','TSHcy':'\u040B','tstrok':'\u0167','Tstrok':'\u0166','twixt':'\u226C','twoheadleftarrow':'\u219E','twoheadrightarrow':'\u21A0','uacute':'\xFA','Uacute':'\xDA','uarr':'\u2191','uArr':'\u21D1','Uarr':'\u219F','Uarrocir':'\u2949','ubrcy':'\u045E','Ubrcy':'\u040E','ubreve':'\u016D','Ubreve':'\u016C','ucirc':'\xFB','Ucirc':'\xDB','ucy':'\u0443','Ucy':'\u0423','udarr':'\u21C5','udblac':'\u0171','Udblac':'\u0170','udhar':'\u296E','ufisht':'\u297E','ufr':'\uD835\uDD32','Ufr':'\uD835\uDD18','ugrave':'\xF9','Ugrave':'\xD9','uHar':'\u2963','uharl':'\u21BF','uharr':'\u21BE','uhblk':'\u2580','ulcorn':'\u231C','ulcorner':'\u231C','ulcrop':'\u230F','ultri':'\u25F8','umacr':'\u016B','Umacr':'\u016A','uml':'\xA8','UnderBar':'_','UnderBrace':'\u23DF','UnderBracket':'\u23B5','UnderParenthesis':'\u23DD','Union':'\u22C3','UnionPlus':'\u228E','uogon':'\u0173','Uogon':'\u0172','uopf':'\uD835\uDD66','Uopf':'\uD835\uDD4C','uparrow':'\u2191','Uparrow':'\u21D1','UpArrow':'\u2191','UpArrowBar':'\u2912','UpArrowDownArrow':'\u21C5','updownarrow':'\u2195','Updownarrow':'\u21D5','UpDownArrow':'\u2195','UpEquilibrium':'\u296E','upharpoonleft':'\u21BF','upharpoonright':'\u21BE','uplus':'\u228E','UpperLeftArrow':'\u2196','UpperRightArrow':'\u2197','upsi':'\u03C5','Upsi':'\u03D2','upsih':'\u03D2','upsilon':'\u03C5','Upsilon':'\u03A5','UpTee':'\u22A5','UpTeeArrow':'\u21A5','upuparrows':'\u21C8','urcorn':'\u231D','urcorner':'\u231D','urcrop':'\u230E','uring':'\u016F','Uring':'\u016E','urtri':'\u25F9','uscr':'\uD835\uDCCA','Uscr':'\uD835\uDCB0','utdot':'\u22F0','utilde':'\u0169','Utilde':'\u0168','utri':'\u25B5','utrif':'\u25B4','uuarr':'\u21C8','uuml':'\xFC','Uuml':'\xDC','uwangle':'\u29A7','vangrt':'\u299C','varepsilon':'\u03F5','varkappa':'\u03F0','varnothing':'\u2205','varphi':'\u03D5','varpi':'\u03D6','varpropto':'\u221D','varr':'\u2195','vArr':'\u21D5','varrho':'\u03F1','varsigma':'\u03C2','varsubsetneq':'\u228A\uFE00','varsubsetneqq':'\u2ACB\uFE00','varsupsetneq':'\u228B\uFE00','varsupsetneqq':'\u2ACC\uFE00','vartheta':'\u03D1','vartriangleleft':'\u22B2','vartriangleright':'\u22B3','vBar':'\u2AE8','Vbar':'\u2AEB','vBarv':'\u2AE9','vcy':'\u0432','Vcy':'\u0412','vdash':'\u22A2','vDash':'\u22A8','Vdash':'\u22A9','VDash':'\u22AB','Vdashl':'\u2AE6','vee':'\u2228','Vee':'\u22C1','veebar':'\u22BB','veeeq':'\u225A','vellip':'\u22EE','verbar':'|','Verbar':'\u2016','vert':'|','Vert':'\u2016','VerticalBar':'\u2223','VerticalLine':'|','VerticalSeparator':'\u2758','VerticalTilde':'\u2240','VeryThinSpace':'\u200A','vfr':'\uD835\uDD33','Vfr':'\uD835\uDD19','vltri':'\u22B2','vnsub':'\u2282\u20D2','vnsup':'\u2283\u20D2','vopf':'\uD835\uDD67','Vopf':'\uD835\uDD4D','vprop':'\u221D','vrtri':'\u22B3','vscr':'\uD835\uDCCB','Vscr':'\uD835\uDCB1','vsubne':'\u228A\uFE00','vsubnE':'\u2ACB\uFE00','vsupne':'\u228B\uFE00','vsupnE':'\u2ACC\uFE00','Vvdash':'\u22AA','vzigzag':'\u299A','wcirc':'\u0175','Wcirc':'\u0174','wedbar':'\u2A5F','wedge':'\u2227','Wedge':'\u22C0','wedgeq':'\u2259','weierp':'\u2118','wfr':'\uD835\uDD34','Wfr':'\uD835\uDD1A','wopf':'\uD835\uDD68','Wopf':'\uD835\uDD4E','wp':'\u2118','wr':'\u2240','wreath':'\u2240','wscr':'\uD835\uDCCC','Wscr':'\uD835\uDCB2','xcap':'\u22C2','xcirc':'\u25EF','xcup':'\u22C3','xdtri':'\u25BD','xfr':'\uD835\uDD35','Xfr':'\uD835\uDD1B','xharr':'\u27F7','xhArr':'\u27FA','xi':'\u03BE','Xi':'\u039E','xlarr':'\u27F5','xlArr':'\u27F8','xmap':'\u27FC','xnis':'\u22FB','xodot':'\u2A00','xopf':'\uD835\uDD69','Xopf':'\uD835\uDD4F','xoplus':'\u2A01','xotime':'\u2A02','xrarr':'\u27F6','xrArr':'\u27F9','xscr':'\uD835\uDCCD','Xscr':'\uD835\uDCB3','xsqcup':'\u2A06','xuplus':'\u2A04','xutri':'\u25B3','xvee':'\u22C1','xwedge':'\u22C0','yacute':'\xFD','Yacute':'\xDD','yacy':'\u044F','YAcy':'\u042F','ycirc':'\u0177','Ycirc':'\u0176','ycy':'\u044B','Ycy':'\u042B','yen':'\xA5','yfr':'\uD835\uDD36','Yfr':'\uD835\uDD1C','yicy':'\u0457','YIcy':'\u0407','yopf':'\uD835\uDD6A','Yopf':'\uD835\uDD50','yscr':'\uD835\uDCCE','Yscr':'\uD835\uDCB4','yucy':'\u044E','YUcy':'\u042E','yuml':'\xFF','Yuml':'\u0178','zacute':'\u017A','Zacute':'\u0179','zcaron':'\u017E','Zcaron':'\u017D','zcy':'\u0437','Zcy':'\u0417','zdot':'\u017C','Zdot':'\u017B','zeetrf':'\u2128','ZeroWidthSpace':'\u200B','zeta':'\u03B6','Zeta':'\u0396','zfr':'\uD835\uDD37','Zfr':'\u2128','zhcy':'\u0436','ZHcy':'\u0416','zigrarr':'\u21DD','zopf':'\uD835\uDD6B','Zopf':'\u2124','zscr':'\uD835\uDCCF','Zscr':'\uD835\uDCB5','zwj':'\u200D','zwnj':'\u200C'};
+  	var decodeMapLegacy = {'aacute':'\xE1','Aacute':'\xC1','acirc':'\xE2','Acirc':'\xC2','acute':'\xB4','aelig':'\xE6','AElig':'\xC6','agrave':'\xE0','Agrave':'\xC0','amp':'&','AMP':'&','aring':'\xE5','Aring':'\xC5','atilde':'\xE3','Atilde':'\xC3','auml':'\xE4','Auml':'\xC4','brvbar':'\xA6','ccedil':'\xE7','Ccedil':'\xC7','cedil':'\xB8','cent':'\xA2','copy':'\xA9','COPY':'\xA9','curren':'\xA4','deg':'\xB0','divide':'\xF7','eacute':'\xE9','Eacute':'\xC9','ecirc':'\xEA','Ecirc':'\xCA','egrave':'\xE8','Egrave':'\xC8','eth':'\xF0','ETH':'\xD0','euml':'\xEB','Euml':'\xCB','frac12':'\xBD','frac14':'\xBC','frac34':'\xBE','gt':'>','GT':'>','iacute':'\xED','Iacute':'\xCD','icirc':'\xEE','Icirc':'\xCE','iexcl':'\xA1','igrave':'\xEC','Igrave':'\xCC','iquest':'\xBF','iuml':'\xEF','Iuml':'\xCF','laquo':'\xAB','lt':'<','LT':'<','macr':'\xAF','micro':'\xB5','middot':'\xB7','nbsp':'\xA0','not':'\xAC','ntilde':'\xF1','Ntilde':'\xD1','oacute':'\xF3','Oacute':'\xD3','ocirc':'\xF4','Ocirc':'\xD4','ograve':'\xF2','Ograve':'\xD2','ordf':'\xAA','ordm':'\xBA','oslash':'\xF8','Oslash':'\xD8','otilde':'\xF5','Otilde':'\xD5','ouml':'\xF6','Ouml':'\xD6','para':'\xB6','plusmn':'\xB1','pound':'\xA3','quot':'"','QUOT':'"','raquo':'\xBB','reg':'\xAE','REG':'\xAE','sect':'\xA7','shy':'\xAD','sup1':'\xB9','sup2':'\xB2','sup3':'\xB3','szlig':'\xDF','thorn':'\xFE','THORN':'\xDE','times':'\xD7','uacute':'\xFA','Uacute':'\xDA','ucirc':'\xFB','Ucirc':'\xDB','ugrave':'\xF9','Ugrave':'\xD9','uml':'\xA8','uuml':'\xFC','Uuml':'\xDC','yacute':'\xFD','Yacute':'\xDD','yen':'\xA5','yuml':'\xFF'};
+  	var decodeMapNumeric = {'0':'\uFFFD','128':'\u20AC','130':'\u201A','131':'\u0192','132':'\u201E','133':'\u2026','134':'\u2020','135':'\u2021','136':'\u02C6','137':'\u2030','138':'\u0160','139':'\u2039','140':'\u0152','142':'\u017D','145':'\u2018','146':'\u2019','147':'\u201C','148':'\u201D','149':'\u2022','150':'\u2013','151':'\u2014','152':'\u02DC','153':'\u2122','154':'\u0161','155':'\u203A','156':'\u0153','158':'\u017E','159':'\u0178'};
+  	var invalidReferenceCodePoints = [1,2,3,4,5,6,7,8,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,64976,64977,64978,64979,64980,64981,64982,64983,64984,64985,64986,64987,64988,64989,64990,64991,64992,64993,64994,64995,64996,64997,64998,64999,65000,65001,65002,65003,65004,65005,65006,65007,65534,65535,131070,131071,196606,196607,262142,262143,327678,327679,393214,393215,458750,458751,524286,524287,589822,589823,655358,655359,720894,720895,786430,786431,851966,851967,917502,917503,983038,983039,1048574,1048575,1114110,1114111];
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var stringFromCharCode = String.fromCharCode;
+
+  	var object = {};
+  	var hasOwnProperty = object.hasOwnProperty;
+  	var has = function(object, propertyName) {
+  		return hasOwnProperty.call(object, propertyName);
+  	};
+
+  	var contains = function(array, value) {
+  		var index = -1;
+  		var length = array.length;
+  		while (++index < length) {
+  			if (array[index] == value) {
+  				return true;
+  			}
+  		}
+  		return false;
+  	};
+
+  	var merge = function(options, defaults) {
+  		if (!options) {
+  			return defaults;
+  		}
+  		var result = {};
+  		var key;
+  		for (key in defaults) {
+  			// A `hasOwnProperty` check is not needed here, since only recognized
+  			// option names are used anyway. Any others are ignored.
+  			result[key] = has(options, key) ? options[key] : defaults[key];
+  		}
+  		return result;
+  	};
+
+  	// Modified version of `ucs2encode`; see https://mths.be/punycode.
+  	var codePointToSymbol = function(codePoint, strict) {
+  		var output = '';
+  		if ((codePoint >= 0xD800 && codePoint <= 0xDFFF) || codePoint > 0x10FFFF) {
+  			// See issue #4:
+  			// “Otherwise, if the number is in the range 0xD800 to 0xDFFF or is
+  			// greater than 0x10FFFF, then this is a parse error. Return a U+FFFD
+  			// REPLACEMENT CHARACTER.”
+  			if (strict) {
+  				parseError('character reference outside the permissible Unicode range');
+  			}
+  			return '\uFFFD';
+  		}
+  		if (has(decodeMapNumeric, codePoint)) {
+  			if (strict) {
+  				parseError('disallowed character reference');
+  			}
+  			return decodeMapNumeric[codePoint];
+  		}
+  		if (strict && contains(invalidReferenceCodePoints, codePoint)) {
+  			parseError('disallowed character reference');
+  		}
+  		if (codePoint > 0xFFFF) {
+  			codePoint -= 0x10000;
+  			output += stringFromCharCode(codePoint >>> 10 & 0x3FF | 0xD800);
+  			codePoint = 0xDC00 | codePoint & 0x3FF;
+  		}
+  		output += stringFromCharCode(codePoint);
+  		return output;
+  	};
+
+  	var hexEscape = function(codePoint) {
+  		return '&#x' + codePoint.toString(16).toUpperCase() + ';';
+  	};
+
+  	var decEscape = function(codePoint) {
+  		return '&#' + codePoint + ';';
+  	};
+
+  	var parseError = function(message) {
+  		throw Error('Parse error: ' + message);
+  	};
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var encode = function(string, options) {
+  		options = merge(options, encode.options);
+  		var strict = options.strict;
+  		if (strict && regexInvalidRawCodePoint.test(string)) {
+  			parseError('forbidden code point');
+  		}
+  		var encodeEverything = options.encodeEverything;
+  		var useNamedReferences = options.useNamedReferences;
+  		var allowUnsafeSymbols = options.allowUnsafeSymbols;
+  		var escapeCodePoint = options.decimal ? decEscape : hexEscape;
+
+  		var escapeBmpSymbol = function(symbol) {
+  			return escapeCodePoint(symbol.charCodeAt(0));
+  		};
+
+  		if (encodeEverything) {
+  			// Encode ASCII symbols.
+  			string = string.replace(regexAsciiWhitelist, function(symbol) {
+  				// Use named references if requested & possible.
+  				if (useNamedReferences && has(encodeMap, symbol)) {
+  					return '&' + encodeMap[symbol] + ';';
+  				}
+  				return escapeBmpSymbol(symbol);
+  			});
+  			// Shorten a few escapes that represent two symbols, of which at least one
+  			// is within the ASCII range.
+  			if (useNamedReferences) {
+  				string = string
+  					.replace(/&gt;\u20D2/g, '&nvgt;')
+  					.replace(/&lt;\u20D2/g, '&nvlt;')
+  					.replace(/&#x66;&#x6A;/g, '&fjlig;');
+  			}
+  			// Encode non-ASCII symbols.
+  			if (useNamedReferences) {
+  				// Encode non-ASCII symbols that can be replaced with a named reference.
+  				string = string.replace(regexEncodeNonAscii, function(string) {
+  					// Note: there is no need to check `has(encodeMap, string)` here.
+  					return '&' + encodeMap[string] + ';';
+  				});
+  			}
+  			// Note: any remaining non-ASCII symbols are handled outside of the `if`.
+  		} else if (useNamedReferences) {
+  			// Apply named character references.
+  			// Encode `<>"'&` using named character references.
+  			if (!allowUnsafeSymbols) {
+  				string = string.replace(regexEscape, function(string) {
+  					return '&' + encodeMap[string] + ';'; // no need to check `has()` here
+  				});
+  			}
+  			// Shorten escapes that represent two symbols, of which at least one is
+  			// `<>"'&`.
+  			string = string
+  				.replace(/&gt;\u20D2/g, '&nvgt;')
+  				.replace(/&lt;\u20D2/g, '&nvlt;');
+  			// Encode non-ASCII symbols that can be replaced with a named reference.
+  			string = string.replace(regexEncodeNonAscii, function(string) {
+  				// Note: there is no need to check `has(encodeMap, string)` here.
+  				return '&' + encodeMap[string] + ';';
+  			});
+  		} else if (!allowUnsafeSymbols) {
+  			// Encode `<>"'&` using hexadecimal escapes, now that they’re not handled
+  			// using named character references.
+  			string = string.replace(regexEscape, escapeBmpSymbol);
+  		}
+  		return string
+  			// Encode astral symbols.
+  			.replace(regexAstralSymbols, function($0) {
+  				// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+  				var high = $0.charCodeAt(0);
+  				var low = $0.charCodeAt(1);
+  				var codePoint = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000;
+  				return escapeCodePoint(codePoint);
+  			})
+  			// Encode any remaining BMP symbols that are not printable ASCII symbols
+  			// using a hexadecimal escape.
+  			.replace(regexBmpWhitelist, escapeBmpSymbol);
+  	};
+  	// Expose default options (so they can be overridden globally).
+  	encode.options = {
+  		'allowUnsafeSymbols': false,
+  		'encodeEverything': false,
+  		'strict': false,
+  		'useNamedReferences': false,
+  		'decimal' : false
+  	};
+
+  	var decode = function(html, options) {
+  		options = merge(options, decode.options);
+  		var strict = options.strict;
+  		if (strict && regexInvalidEntity.test(html)) {
+  			parseError('malformed character reference');
+  		}
+  		return html.replace(regexDecode, function($0, $1, $2, $3, $4, $5, $6, $7, $8) {
+  			var codePoint;
+  			var semicolon;
+  			var decDigits;
+  			var hexDigits;
+  			var reference;
+  			var next;
+
+  			if ($1) {
+  				reference = $1;
+  				// Note: there is no need to check `has(decodeMap, reference)`.
+  				return decodeMap[reference];
+  			}
+
+  			if ($2) {
+  				// Decode named character references without trailing `;`, e.g. `&amp`.
+  				// This is only a parse error if it gets converted to `&`, or if it is
+  				// followed by `=` in an attribute context.
+  				reference = $2;
+  				next = $3;
+  				if (next && options.isAttributeValue) {
+  					if (strict && next == '=') {
+  						parseError('`&` did not start a character reference');
+  					}
+  					return $0;
+  				} else {
+  					if (strict) {
+  						parseError(
+  							'named character reference was not terminated by a semicolon'
+  						);
+  					}
+  					// Note: there is no need to check `has(decodeMapLegacy, reference)`.
+  					return decodeMapLegacy[reference] + (next || '');
+  				}
+  			}
+
+  			if ($4) {
+  				// Decode decimal escapes, e.g. `&#119558;`.
+  				decDigits = $4;
+  				semicolon = $5;
+  				if (strict && !semicolon) {
+  					parseError('character reference was not terminated by a semicolon');
+  				}
+  				codePoint = parseInt(decDigits, 10);
+  				return codePointToSymbol(codePoint, strict);
+  			}
+
+  			if ($6) {
+  				// Decode hexadecimal escapes, e.g. `&#x1D306;`.
+  				hexDigits = $6;
+  				semicolon = $7;
+  				if (strict && !semicolon) {
+  					parseError('character reference was not terminated by a semicolon');
+  				}
+  				codePoint = parseInt(hexDigits, 16);
+  				return codePointToSymbol(codePoint, strict);
+  			}
+
+  			// If we’re still here, `if ($7)` is implied; it’s an ambiguous
+  			// ampersand for sure. https://mths.be/notes/ambiguous-ampersands
+  			if (strict) {
+  				parseError(
+  					'named character reference was not terminated by a semicolon'
+  				);
+  			}
+  			return $0;
+  		});
+  	};
+  	// Expose default options (so they can be overridden globally).
+  	decode.options = {
+  		'isAttributeValue': false,
+  		'strict': false
+  	};
+
+  	var escape = function(string) {
+  		return string.replace(regexEscape, function($0) {
+  			// Note: there is no need to check `has(escapeMap, $0)` here.
+  			return escapeMap[$0];
+  		});
+  	};
+
+  	/*--------------------------------------------------------------------------*/
+
+  	var he = {
+  		'version': '1.2.0',
+  		'encode': encode,
+  		'decode': decode,
+  		'escape': escape,
+  		'unescape': decode
+  	};
+
+  	// Some AMD build optimizers, like r.js, check for specific condition patterns
+  	// like the following:
+  	if (freeExports && !freeExports.nodeType) {
+  		if (freeModule) { // in Node.js, io.js, or RingoJS v0.8.0+
+  			freeModule.exports = he;
+  		} else { // in Narwhal or RingoJS v0.7.0-
+  			for (var key in he) {
+  				has(he, key) && (freeExports[key] = he[key]);
+  			}
+  		}
+  	} else { // in Rhino or a web browser
+  		root.he = he;
+  	}
+
+  }(commonjsGlobal));
+  });
+
+  /*  */
+
+  /**
+   * Cross-platform code generation for component v-model
+   */
+  function genComponentModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var ref = modifiers || {};
+    var number = ref.number;
+    var trim = ref.trim;
+
+    var baseValueExpression = '$$v';
+    var valueExpression = baseValueExpression;
+    if (trim) {
+      valueExpression =
+        "(typeof " + baseValueExpression + " === 'string'" +
+        "? " + baseValueExpression + ".trim()" +
+        ": " + baseValueExpression + ")";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+    var assignment = genAssignmentCode(value, valueExpression);
+
+    el.model = {
+      value: ("(" + value + ")"),
+      expression: JSON.stringify(value),
+      callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
+    };
   }
-}
 
-function makeAttrsMap (attrs) {
-  var map = {};
-  for (var i = 0, l = attrs.length; i < l; i++) {
-    if (
-      "development" !== 'production' &&
-      map[attrs[i].name] && !isIE && !isEdge
-    ) {
-      warn$1('duplicate attribute: ' + attrs[i].name);
+  /**
+   * Cross-platform codegen helper for generating v-model value assignment code.
+   */
+  function genAssignmentCode (
+    value,
+    assignment
+  ) {
+    var res = parseModel(value);
+    if (res.key === null) {
+      return (value + "=" + assignment)
+    } else {
+      return ("$set(" + (res.exp) + ", " + (res.key) + ", " + assignment + ")")
     }
-    map[attrs[i].name] = attrs[i].value;
   }
-  return map
-}
 
-// for script (e.g. type="x/template") or style, do not decode content
-function isTextTag (el) {
-  return el.tag === 'script' || el.tag === 'style'
-}
+  /**
+   * Parse a v-model expression into a base path and a final key segment.
+   * Handles both dot-path and possible square brackets.
+   *
+   * Possible cases:
+   *
+   * - test
+   * - test[key]
+   * - test[test1[key]]
+   * - test["a"][key]
+   * - xxx.test[a[a].test1[key]]
+   * - test.xxx.a["asa"][test1[key]]
+   *
+   */
+
+  var len, str, chr, index, expressionPos, expressionEndPos;
 
-function isForbiddenTag (el) {
-  return (
-    el.tag === 'style' ||
-    (el.tag === 'script' && (
-      !el.attrsMap.type ||
-      el.attrsMap.type === 'text/javascript'
-    ))
-  )
-}
 
-var ieNSBug = /^xmlns:NS\d+/;
-var ieNSPrefix = /^NS\d+:/;
 
-/* istanbul ignore next */
-function guardIESVGBug (attrs) {
-  var res = [];
-  for (var i = 0; i < attrs.length; i++) {
-    var attr = attrs[i];
-    if (!ieNSBug.test(attr.name)) {
-      attr.name = attr.name.replace(ieNSPrefix, '');
-      res.push(attr);
-    }
-  }
-  return res
-}
+  function parseModel (val) {
+    // Fix https://github.com/vuejs/vue/pull/7730
+    // allow v-model="obj.val " (trailing whitespace)
+    val = val.trim();
+    len = val.length;
+
+    if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
+      index = val.lastIndexOf('.');
+      if (index > -1) {
+        return {
+          exp: val.slice(0, index),
+          key: '"' + val.slice(index + 1) + '"'
+        }
+      } else {
+        return {
+          exp: val,
+          key: null
+        }
+      }
+    }
+
+    str = val;
+    index = expressionPos = expressionEndPos = 0;
+
+    while (!eof()) {
+      chr = next();
+      /* istanbul ignore if */
+      if (isStringStart(chr)) {
+        parseString(chr);
+      } else if (chr === 0x5B) {
+        parseBracket(chr);
+      }
+    }
+
+    return {
+      exp: val.slice(0, expressionPos),
+      key: val.slice(expressionPos + 1, expressionEndPos)
+    }
+  }
+
+  function next () {
+    return str.charCodeAt(++index)
+  }
+
+  function eof () {
+    return index >= len
+  }
+
+  function isStringStart (chr) {
+    return chr === 0x22 || chr === 0x27
+  }
+
+  function parseBracket (chr) {
+    var inBracket = 1;
+    expressionPos = index;
+    while (!eof()) {
+      chr = next();
+      if (isStringStart(chr)) {
+        parseString(chr);
+        continue
+      }
+      if (chr === 0x5B) { inBracket++; }
+      if (chr === 0x5D) { inBracket--; }
+      if (inBracket === 0) {
+        expressionEndPos = index;
+        break
+      }
+    }
+  }
+
+  function parseString (chr) {
+    var stringQuote = chr;
+    while (!eof()) {
+      chr = next();
+      if (chr === stringQuote) {
+        break
+      }
+    }
+  }
+
+  /*  */
+
+  var onRE = /^@|^v-on:/;
+  var dirRE = /^v-|^@|^:|^#/;
+  var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
+  var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
+  var stripParensRE = /^\(|\)$/g;
+  var dynamicArgRE = /^\[.*\]$/;
+
+  var argRE = /:(.*)$/;
+  var bindRE = /^:|^\.|^v-bind:/;
+  var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+  var slotRE = /^v-slot(:|$)|^#/;
+
+  var lineBreakRE = /[\r\n]/;
+  var whitespaceRE = /[ \f\t\r\n]+/g;
+
+  var invalidAttributeRE = /[\s"'<>\/=]/;
+
+  var decodeHTMLCached = cached(he.decode);
+
+  var emptySlotScopeToken = "_empty_";
+
+  // configurable state
+  var warn$1;
+  var delimiters;
+  var transforms;
+  var preTransforms;
+  var postTransforms;
+  var platformIsPreTag;
+  var platformMustUseProp;
+  var platformGetTagNamespace;
+  var maybeComponent;
+
+  function createASTElement (
+    tag,
+    attrs,
+    parent
+  ) {
+    return {
+      type: 1,
+      tag: tag,
+      attrsList: attrs,
+      attrsMap: makeAttrsMap(attrs),
+      rawAttrsMap: {},
+      parent: parent,
+      children: []
+    }
+  }
+
+  /**
+   * Convert HTML string to AST.
+   */
+  function parse (
+    template,
+    options
+  ) {
+    warn$1 = options.warn || baseWarn;
+
+    platformIsPreTag = options.isPreTag || no;
+    platformMustUseProp = options.mustUseProp || no;
+    platformGetTagNamespace = options.getTagNamespace || no;
+    var isReservedTag = options.isReservedTag || no;
+    maybeComponent = function (el) { return !!(
+      el.component ||
+      el.attrsMap[':is'] ||
+      el.attrsMap['v-bind:is'] ||
+      !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+    ); };
+    transforms = pluckModuleFunction(options.modules, 'transformNode');
+    preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
+    postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
+
+    delimiters = options.delimiters;
+
+    var stack = [];
+    var preserveWhitespace = options.preserveWhitespace !== false;
+    var whitespaceOption = options.whitespace;
+    var root;
+    var currentParent;
+    var inVPre = false;
+    var inPre = false;
+    var warned = false;
+
+    function warnOnce (msg, range) {
+      if (!warned) {
+        warned = true;
+        warn$1(msg, range);
+      }
+    }
+
+    function closeElement (element) {
+      trimEndingWhitespace(element);
+      if (!inVPre && !element.processed) {
+        element = processElement(element, options);
+      }
+      // tree management
+      if (!stack.length && element !== root) {
+        // allow root elements with v-if, v-else-if and v-else
+        if (root.if && (element.elseif || element.else)) {
+          {
+            checkRootConstraints(element);
+          }
+          addIfCondition(root, {
+            exp: element.elseif,
+            block: element
+          });
+        } else {
+          warnOnce(
+            "Component template should contain exactly one root element. " +
+            "If you are using v-if on multiple elements, " +
+            "use v-else-if to chain them instead.",
+            { start: element.start }
+          );
+        }
+      }
+      if (currentParent && !element.forbidden) {
+        if (element.elseif || element.else) {
+          processIfConditions(element, currentParent);
+        } else {
+          if (element.slotScope) {
+            // scoped slot
+            // keep it in the children list so that v-else(-if) conditions can
+            // find it as the prev node.
+            var name = element.slotTarget || '"default"'
+            ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+          }
+          currentParent.children.push(element);
+          element.parent = currentParent;
+        }
+      }
+
+      // final children cleanup
+      // filter out scoped slots
+      element.children = element.children.filter(function (c) { return !(c).slotScope; });
+      // remove trailing whitespace node again
+      trimEndingWhitespace(element);
+
+      // check pre state
+      if (element.pre) {
+        inVPre = false;
+      }
+      if (platformIsPreTag(element.tag)) {
+        inPre = false;
+      }
+      // apply post-transforms
+      for (var i = 0; i < postTransforms.length; i++) {
+        postTransforms[i](element, options);
+      }
+    }
+
+    function trimEndingWhitespace (el) {
+      // remove trailing whitespace node
+      if (!inPre) {
+        var lastNode;
+        while (
+          (lastNode = el.children[el.children.length - 1]) &&
+          lastNode.type === 3 &&
+          lastNode.text === ' '
+        ) {
+          el.children.pop();
+        }
+      }
+    }
+
+    function checkRootConstraints (el) {
+      if (el.tag === 'slot' || el.tag === 'template') {
+        warnOnce(
+          "Cannot use <" + (el.tag) + "> as component root element because it may " +
+          'contain multiple nodes.',
+          { start: el.start }
+        );
+      }
+      if (el.attrsMap.hasOwnProperty('v-for')) {
+        warnOnce(
+          'Cannot use v-for on stateful component root element because ' +
+          'it renders multiple elements.',
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+
+    parseHTML(template, {
+      warn: warn$1,
+      expectHTML: options.expectHTML,
+      isUnaryTag: options.isUnaryTag,
+      canBeLeftOpenTag: options.canBeLeftOpenTag,
+      shouldDecodeNewlines: options.shouldDecodeNewlines,
+      shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
+      shouldKeepComment: options.comments,
+      outputSourceRange: options.outputSourceRange,
+      start: function start (tag, attrs, unary, start$1, end) {
+        // check namespace.
+        // inherit parent ns if there is one
+        var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
+
+        // handle IE svg bug
+        /* istanbul ignore if */
+        if (isIE && ns === 'svg') {
+          attrs = guardIESVGBug(attrs);
+        }
+
+        var element = createASTElement(tag, attrs, currentParent);
+        if (ns) {
+          element.ns = ns;
+        }
+
+        {
+          if (options.outputSourceRange) {
+            element.start = start$1;
+            element.end = end;
+            element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+              cumulated[attr.name] = attr;
+              return cumulated
+            }, {});
+          }
+          attrs.forEach(function (attr) {
+            if (invalidAttributeRE.test(attr.name)) {
+              warn$1(
+                "Invalid dynamic argument expression: attribute names cannot contain " +
+                "spaces, quotes, <, >, / or =.",
+                {
+                  start: attr.start + attr.name.indexOf("["),
+                  end: attr.start + attr.name.length
+                }
+              );
+            }
+          });
+        }
+
+        if (isForbiddenTag(element) && !isServerRendering()) {
+          element.forbidden = true;
+          warn$1(
+            'Templates should only be responsible for mapping the state to the ' +
+            'UI. Avoid placing tags with side-effects in your templates, such as ' +
+            "<" + tag + ">" + ', as they will not be parsed.',
+            { start: element.start }
+          );
+        }
+
+        // apply pre-transforms
+        for (var i = 0; i < preTransforms.length; i++) {
+          element = preTransforms[i](element, options) || element;
+        }
+
+        if (!inVPre) {
+          processPre(element);
+          if (element.pre) {
+            inVPre = true;
+          }
+        }
+        if (platformIsPreTag(element.tag)) {
+          inPre = true;
+        }
+        if (inVPre) {
+          processRawAttrs(element);
+        } else if (!element.processed) {
+          // structural directives
+          processFor(element);
+          processIf(element);
+          processOnce(element);
+        }
+
+        if (!root) {
+          root = element;
+          {
+            checkRootConstraints(root);
+          }
+        }
+
+        if (!unary) {
+          currentParent = element;
+          stack.push(element);
+        } else {
+          closeElement(element);
+        }
+      },
+
+      end: function end (tag, start, end$1) {
+        var element = stack[stack.length - 1];
+        // pop stack
+        stack.length -= 1;
+        currentParent = stack[stack.length - 1];
+        if (options.outputSourceRange) {
+          element.end = end$1;
+        }
+        closeElement(element);
+      },
+
+      chars: function chars (text, start, end) {
+        if (!currentParent) {
+          {
+            if (text === template) {
+              warnOnce(
+                'Component template requires a root element, rather than just text.',
+                { start: start }
+              );
+            } else if ((text = text.trim())) {
+              warnOnce(
+                ("text \"" + text + "\" outside root element will be ignored."),
+                { start: start }
+              );
+            }
+          }
+          return
+        }
+        // IE textarea placeholder bug
+        /* istanbul ignore if */
+        if (isIE &&
+          currentParent.tag === 'textarea' &&
+          currentParent.attrsMap.placeholder === text
+        ) {
+          return
+        }
+        var children = currentParent.children;
+        if (inPre || text.trim()) {
+          text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+        } else if (!children.length) {
+          // remove the whitespace-only node right after an opening tag
+          text = '';
+        } else if (whitespaceOption) {
+          if (whitespaceOption === 'condense') {
+            // in condense mode, remove the whitespace node if it contains
+            // line break, otherwise condense to a single space
+            text = lineBreakRE.test(text) ? '' : ' ';
+          } else {
+            text = ' ';
+          }
+        } else {
+          text = preserveWhitespace ? ' ' : '';
+        }
+        if (text) {
+          if (!inPre && whitespaceOption === 'condense') {
+            // condense consecutive whitespaces into single space
+            text = text.replace(whitespaceRE, ' ');
+          }
+          var res;
+          var child;
+          if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
+            child = {
+              type: 2,
+              expression: res.expression,
+              tokens: res.tokens,
+              text: text
+            };
+          } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
+            child = {
+              type: 3,
+              text: text
+            };
+          }
+          if (child) {
+            if (options.outputSourceRange) {
+              child.start = start;
+              child.end = end;
+            }
+            children.push(child);
+          }
+        }
+      },
+      comment: function comment (text, start, end) {
+        // adding anything as a sibling to the root node is forbidden
+        // comments should still be allowed, but ignored
+        if (currentParent) {
+          var child = {
+            type: 3,
+            text: text,
+            isComment: true
+          };
+          if (options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          currentParent.children.push(child);
+        }
+      }
+    });
+    return root
+  }
+
+  function processPre (el) {
+    if (getAndRemoveAttr(el, 'v-pre') != null) {
+      el.pre = true;
+    }
+  }
+
+  function processRawAttrs (el) {
+    var list = el.attrsList;
+    var len = list.length;
+    if (len) {
+      var attrs = el.attrs = new Array(len);
+      for (var i = 0; i < len; i++) {
+        attrs[i] = {
+          name: list[i].name,
+          value: JSON.stringify(list[i].value)
+        };
+        if (list[i].start != null) {
+          attrs[i].start = list[i].start;
+          attrs[i].end = list[i].end;
+        }
+      }
+    } else if (!el.pre) {
+      // non root node in pre blocks with no attributes
+      el.plain = true;
+    }
+  }
+
+  function processElement (
+    element,
+    options
+  ) {
+    processKey(element);
+
+    // determine whether this is a plain element after
+    // removing structural attributes
+    element.plain = (
+      !element.key &&
+      !element.scopedSlots &&
+      !element.attrsList.length
+    );
+
+    processRef(element);
+    processSlotContent(element);
+    processSlotOutlet(element);
+    processComponent(element);
+    for (var i = 0; i < transforms.length; i++) {
+      element = transforms[i](element, options) || element;
+    }
+    processAttrs(element);
+    return element
+  }
+
+  function processKey (el) {
+    var exp = getBindingAttr(el, 'key');
+    if (exp) {
+      {
+        if (el.tag === 'template') {
+          warn$1(
+            "<template> cannot be keyed. Place the key on real elements instead.",
+            getRawBindingAttr(el, 'key')
+          );
+        }
+        if (el.for) {
+          var iterator = el.iterator2 || el.iterator1;
+          var parent = el.parent;
+          if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+            warn$1(
+              "Do not use v-for index as key on <transition-group> children, " +
+              "this is the same as not using keys.",
+              getRawBindingAttr(el, 'key'),
+              true /* tip */
+            );
+          }
+        }
+      }
+      el.key = exp;
+    }
+  }
+
+  function processRef (el) {
+    var ref = getBindingAttr(el, 'ref');
+    if (ref) {
+      el.ref = ref;
+      el.refInFor = checkInFor(el);
+    }
+  }
+
+  function processFor (el) {
+    var exp;
+    if ((exp = getAndRemoveAttr(el, 'v-for'))) {
+      var res = parseFor(exp);
+      if (res) {
+        extend(el, res);
+      } else {
+        warn$1(
+          ("Invalid v-for expression: " + exp),
+          el.rawAttrsMap['v-for']
+        );
+      }
+    }
+  }
+
+
+
+  function parseFor (exp) {
+    var inMatch = exp.match(forAliasRE);
+    if (!inMatch) { return }
+    var res = {};
+    res.for = inMatch[2].trim();
+    var alias = inMatch[1].trim().replace(stripParensRE, '');
+    var iteratorMatch = alias.match(forIteratorRE);
+    if (iteratorMatch) {
+      res.alias = alias.replace(forIteratorRE, '').trim();
+      res.iterator1 = iteratorMatch[1].trim();
+      if (iteratorMatch[2]) {
+        res.iterator2 = iteratorMatch[2].trim();
+      }
+    } else {
+      res.alias = alias;
+    }
+    return res
+  }
+
+  function processIf (el) {
+    var exp = getAndRemoveAttr(el, 'v-if');
+    if (exp) {
+      el.if = exp;
+      addIfCondition(el, {
+        exp: exp,
+        block: el
+      });
+    } else {
+      if (getAndRemoveAttr(el, 'v-else') != null) {
+        el.else = true;
+      }
+      var elseif = getAndRemoveAttr(el, 'v-else-if');
+      if (elseif) {
+        el.elseif = elseif;
+      }
+    }
+  }
+
+  function processIfConditions (el, parent) {
+    var prev = findPrevElement(parent.children);
+    if (prev && prev.if) {
+      addIfCondition(prev, {
+        exp: el.elseif,
+        block: el
+      });
+    } else {
+      warn$1(
+        "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
+        "used on element <" + (el.tag) + "> without corresponding v-if.",
+        el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
+      );
+    }
+  }
+
+  function findPrevElement (children) {
+    var i = children.length;
+    while (i--) {
+      if (children[i].type === 1) {
+        return children[i]
+      } else {
+        if (children[i].text !== ' ') {
+          warn$1(
+            "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
+            "will be ignored.",
+            children[i]
+          );
+        }
+        children.pop();
+      }
+    }
+  }
+
+  function addIfCondition (el, condition) {
+    if (!el.ifConditions) {
+      el.ifConditions = [];
+    }
+    el.ifConditions.push(condition);
+  }
+
+  function processOnce (el) {
+    var once$$1 = getAndRemoveAttr(el, 'v-once');
+    if (once$$1 != null) {
+      el.once = true;
+    }
+  }
+
+  // handle content being passed to a component as slot,
+  // e.g. <template slot="xxx">, <div slot-scope="xxx">
+  function processSlotContent (el) {
+    var slotScope;
+    if (el.tag === 'template') {
+      slotScope = getAndRemoveAttr(el, 'scope');
+      /* istanbul ignore if */
+      if (slotScope) {
+        warn$1(
+          "the \"scope\" attribute for scoped slots have been deprecated and " +
+          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+          "can also be used on plain elements in addition to <template> to " +
+          "denote scoped slots.",
+          el.rawAttrsMap['scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+      /* istanbul ignore if */
+      if (el.attrsMap['v-for']) {
+        warn$1(
+          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+          "(v-for takes higher priority). Use a wrapper <template> for the " +
+          "scoped slot to make it clearer.",
+          el.rawAttrsMap['slot-scope'],
+          true
+        );
+      }
+      el.slotScope = slotScope;
+    }
+
+    // slot="xxx"
+    var slotTarget = getBindingAttr(el, 'slot');
+    if (slotTarget) {
+      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+      el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+      // preserve slot as an attribute for native shadow DOM compat
+      // only for non-scoped slots.
+      if (el.tag !== 'template' && !el.slotScope) {
+        addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+      }
+    }
+
+    // 2.6 v-slot syntax
+    {
+      if (el.tag === 'template') {
+        // v-slot on <template>
+        var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding) {
+          {
+            if (el.slotTarget || el.slotScope) {
+              warn$1(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.parent && !maybeComponent(el.parent)) {
+              warn$1(
+                "<template v-slot> can only appear at the root level inside " +
+                "the receiving component",
+                el
+              );
+            }
+          }
+          var ref = getSlotName(slotBinding);
+          var name = ref.name;
+          var dynamic = ref.dynamic;
+          el.slotTarget = name;
+          el.slotTargetDynamic = dynamic;
+          el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+        }
+      } else {
+        // v-slot on component, denotes default slot
+        var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+        if (slotBinding$1) {
+          {
+            if (!maybeComponent(el)) {
+              warn$1(
+                "v-slot can only be used on components or <template>.",
+                slotBinding$1
+              );
+            }
+            if (el.slotScope || el.slotTarget) {
+              warn$1(
+                "Unexpected mixed usage of different slot syntaxes.",
+                el
+              );
+            }
+            if (el.scopedSlots) {
+              warn$1(
+                "To avoid scope ambiguity, the default slot should also use " +
+                "<template> syntax when there are other named slots.",
+                slotBinding$1
+              );
+            }
+          }
+          // add the component's children to its default slot
+          var slots = el.scopedSlots || (el.scopedSlots = {});
+          var ref$1 = getSlotName(slotBinding$1);
+          var name$1 = ref$1.name;
+          var dynamic$1 = ref$1.dynamic;
+          var slotContainer = slots[name$1] = createASTElement('template', [], el);
+          slotContainer.slotTarget = name$1;
+          slotContainer.slotTargetDynamic = dynamic$1;
+          slotContainer.children = el.children.filter(function (c) {
+            if (!c.slotScope) {
+              c.parent = slotContainer;
+              return true
+            }
+          });
+          slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+          // remove children as they are returned from scopedSlots now
+          el.children = [];
+          // mark el non-plain so data gets generated
+          el.plain = false;
+        }
+      }
+    }
+  }
+
+  function getSlotName (binding) {
+    var name = binding.name.replace(slotRE, '');
+    if (!name) {
+      if (binding.name[0] !== '#') {
+        name = 'default';
+      } else {
+        warn$1(
+          "v-slot shorthand syntax requires a slot name.",
+          binding
+        );
+      }
+    }
+    return dynamicArgRE.test(name)
+      // dynamic [name]
+      ? { name: name.slice(1, -1), dynamic: true }
+      // static name
+      : { name: ("\"" + name + "\""), dynamic: false }
+  }
+
+  // handle <slot/> outlets
+  function processSlotOutlet (el) {
+    if (el.tag === 'slot') {
+      el.slotName = getBindingAttr(el, 'name');
+      if (el.key) {
+        warn$1(
+          "`key` does not work on <slot> because slots are abstract outlets " +
+          "and can possibly expand into multiple elements. " +
+          "Use the key on a wrapping element instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+    }
+  }
+
+  function processComponent (el) {
+    var binding;
+    if ((binding = getBindingAttr(el, 'is'))) {
+      el.component = binding;
+    }
+    if (getAndRemoveAttr(el, 'inline-template') != null) {
+      el.inlineTemplate = true;
+    }
+  }
+
+  function processAttrs (el) {
+    var list = el.attrsList;
+    var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
+    for (i = 0, l = list.length; i < l; i++) {
+      name = rawName = list[i].name;
+      value = list[i].value;
+      if (dirRE.test(name)) {
+        // mark element as dynamic
+        el.hasBindings = true;
+        // modifiers
+        modifiers = parseModifiers(name.replace(dirRE, ''));
+        // support .foo shorthand syntax for the .prop modifier
+        if (modifiers) {
+          name = name.replace(modifierRE, '');
+        }
+        if (bindRE.test(name)) { // v-bind
+          name = name.replace(bindRE, '');
+          value = parseFilters(value);
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          if (
+            value.trim().length === 0
+          ) {
+            warn$1(
+              ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+            );
+          }
+          if (modifiers) {
+            if (modifiers.prop && !isDynamic) {
+              name = camelize(name);
+              if (name === 'innerHtml') { name = 'innerHTML'; }
+            }
+            if (modifiers.camel && !isDynamic) {
+              name = camelize(name);
+            }
+            if (modifiers.sync) {
+              syncGen = genAssignmentCode(value, "$event");
+              if (!isDynamic) {
+                addHandler(
+                  el,
+                  ("update:" + (camelize(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i]
+                );
+                if (hyphenate(name) !== camelize(name)) {
+                  addHandler(
+                    el,
+                    ("update:" + (hyphenate(name))),
+                    syncGen,
+                    null,
+                    false,
+                    warn$1,
+                    list[i]
+                  );
+                }
+              } else {
+                // handler w/ dynamic event name
+                addHandler(
+                  el,
+                  ("\"update:\"+(" + name + ")"),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i],
+                  true // dynamic
+                );
+              }
+            }
+          }
+          if ((modifiers && modifiers.prop) || (
+            !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
+          )) {
+            addProp(el, name, value, list[i], isDynamic);
+          } else {
+            addAttr(el, name, value, list[i], isDynamic);
+          }
+        } else if (onRE.test(name)) { // v-on
+          name = name.replace(onRE, '');
+          isDynamic = dynamicArgRE.test(name);
+          if (isDynamic) {
+            name = name.slice(1, -1);
+          }
+          addHandler(el, name, value, modifiers, false, warn$1, list[i], isDynamic);
+        } else { // normal directives
+          name = name.replace(dirRE, '');
+          // parse arg
+          var argMatch = name.match(argRE);
+          var arg = argMatch && argMatch[1];
+          isDynamic = false;
+          if (arg) {
+            name = name.slice(0, -(arg.length + 1));
+            if (dynamicArgRE.test(arg)) {
+              arg = arg.slice(1, -1);
+              isDynamic = true;
+            }
+          }
+          addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
+          if (name === 'model') {
+            checkForAliasModel(el, value);
+          }
+        }
+      } else {
+        // literal attribute
+        {
+          var res = parseText(value, delimiters);
+          if (res) {
+            warn$1(
+              name + "=\"" + value + "\": " +
+              'Interpolation inside attributes has been removed. ' +
+              'Use v-bind or the colon shorthand instead. For example, ' +
+              'instead of <div id="{{ val }}">, use <div :id="val">.',
+              list[i]
+            );
+          }
+        }
+        addAttr(el, name, JSON.stringify(value), list[i]);
+        // #6887 firefox doesn't update muted state if set via attribute
+        // even immediately after element creation
+        if (!el.component &&
+            name === 'muted' &&
+            platformMustUseProp(el.tag, el.attrsMap.type, name)) {
+          addProp(el, name, 'true', list[i]);
+        }
+      }
+    }
+  }
+
+  function checkInFor (el) {
+    var parent = el;
+    while (parent) {
+      if (parent.for !== undefined) {
+        return true
+      }
+      parent = parent.parent;
+    }
+    return false
+  }
+
+  function parseModifiers (name) {
+    var match = name.match(modifierRE);
+    if (match) {
+      var ret = {};
+      match.forEach(function (m) { ret[m.slice(1)] = true; });
+      return ret
+    }
+  }
+
+  function makeAttrsMap (attrs) {
+    var map = {};
+    for (var i = 0, l = attrs.length; i < l; i++) {
+      if (
+        map[attrs[i].name] && !isIE && !isEdge
+      ) {
+        warn$1('duplicate attribute: ' + attrs[i].name, attrs[i]);
+      }
+      map[attrs[i].name] = attrs[i].value;
+    }
+    return map
+  }
+
+  // for script (e.g. type="x/template") or style, do not decode content
+  function isTextTag (el) {
+    return el.tag === 'script' || el.tag === 'style'
+  }
+
+  function isForbiddenTag (el) {
+    return (
+      el.tag === 'style' ||
+      (el.tag === 'script' && (
+        !el.attrsMap.type ||
+        el.attrsMap.type === 'text/javascript'
+      ))
+    )
+  }
+
+  var ieNSBug = /^xmlns:NS\d+/;
+  var ieNSPrefix = /^NS\d+:/;
+
+  /* istanbul ignore next */
+  function guardIESVGBug (attrs) {
+    var res = [];
+    for (var i = 0; i < attrs.length; i++) {
+      var attr = attrs[i];
+      if (!ieNSBug.test(attr.name)) {
+        attr.name = attr.name.replace(ieNSPrefix, '');
+        res.push(attr);
+      }
+    }
+    return res
+  }
+
+  function checkForAliasModel (el, value) {
+    var _el = el;
+    while (_el) {
+      if (_el.for && _el.alias === value) {
+        warn$1(
+          "<" + (el.tag) + " v-model=\"" + value + "\">: " +
+          "You are binding v-model directly to a v-for iteration alias. " +
+          "This will not be able to modify the v-for source array because " +
+          "writing to the alias is like modifying a function local variable. " +
+          "Consider using an array of objects and use v-model on an object property instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+      _el = _el.parent;
+    }
+  }
+
+  /*  */
+
+  function preTransformNode (el, options) {
+    if (el.tag === 'input') {
+      var map = el.attrsMap;
+      if (!map['v-model']) {
+        return
+      }
+
+      var typeBinding;
+      if (map[':type'] || map['v-bind:type']) {
+        typeBinding = getBindingAttr(el, 'type');
+      }
+      if (!map.type && !typeBinding && map['v-bind']) {
+        typeBinding = "(" + (map['v-bind']) + ").type";
+      }
+
+      if (typeBinding) {
+        var ifCondition = getAndRemoveAttr(el, 'v-if', true);
+        var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
+        var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
+        var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
+        // 1. checkbox
+        var branch0 = cloneASTElement(el);
+        // process for on the main node
+        processFor(branch0);
+        addRawAttr(branch0, 'type', 'checkbox');
+        processElement(branch0, options);
+        branch0.processed = true; // prevent it from double-processed
+        branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
+        addIfCondition(branch0, {
+          exp: branch0.if,
+          block: branch0
+        });
+        // 2. add radio else-if condition
+        var branch1 = cloneASTElement(el);
+        getAndRemoveAttr(branch1, 'v-for', true);
+        addRawAttr(branch1, 'type', 'radio');
+        processElement(branch1, options);
+        addIfCondition(branch0, {
+          exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
+          block: branch1
+        });
+        // 3. other
+        var branch2 = cloneASTElement(el);
+        getAndRemoveAttr(branch2, 'v-for', true);
+        addRawAttr(branch2, ':type', typeBinding);
+        processElement(branch2, options);
+        addIfCondition(branch0, {
+          exp: ifCondition,
+          block: branch2
+        });
+
+        if (hasElse) {
+          branch0.else = true;
+        } else if (elseIfCondition) {
+          branch0.elseif = elseIfCondition;
+        }
+
+        return branch0
+      }
+    }
+  }
+
+  function cloneASTElement (el) {
+    return createASTElement(el.tag, el.attrsList.slice(), el.parent)
+  }
+
+  var model = {
+    preTransformNode: preTransformNode
+  };
+
+  var modules = [
+    klass,
+    style,
+    model
+  ];
+
+  /*  */
+
+  var warn$2;
+
+  // in some cases, the event used has to be determined at runtime
+  // so we used some reserved tokens during compile.
+  var RANGE_TOKEN = '__r';
+
+  function model$1 (
+    el,
+    dir,
+    _warn
+  ) {
+    warn$2 = _warn;
+    var value = dir.value;
+    var modifiers = dir.modifiers;
+    var tag = el.tag;
+    var type = el.attrsMap.type;
+
+    {
+      // inputs with type="file" are read only and setting the input's
+      // value will throw an error.
+      if (tag === 'input' && type === 'file') {
+        warn$2(
+          "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
+          "File inputs are read only. Use a v-on:change listener instead.",
+          el.rawAttrsMap['v-model']
+        );
+      }
+    }
+
+    if (el.component) {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    } else if (tag === 'select') {
+      genSelect(el, value, modifiers);
+    } else if (tag === 'input' && type === 'checkbox') {
+      genCheckboxModel(el, value, modifiers);
+    } else if (tag === 'input' && type === 'radio') {
+      genRadioModel(el, value, modifiers);
+    } else if (tag === 'input' || tag === 'textarea') {
+      genDefaultModel(el, value, modifiers);
+    } else {
+      genComponentModel(el, value, modifiers);
+      // component v-model doesn't need extra runtime
+      return false
+    }
+
+    // ensure runtime directive metadata
+    return true
+  }
+
+  function genCheckboxModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
+    var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
+    addProp(el, 'checked',
+      "Array.isArray(" + value + ")" +
+      "?_i(" + value + "," + valueBinding + ")>-1" + (
+        trueValueBinding === 'true'
+          ? (":(" + value + ")")
+          : (":_q(" + value + "," + trueValueBinding + ")")
+      )
+    );
+    addHandler(el, 'change',
+      "var $$a=" + value + "," +
+          '$$el=$event.target,' +
+          "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
+      'if(Array.isArray($$a)){' +
+        "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
+            '$$i=_i($$a,$$v);' +
+        "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+        "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
+      "}else{" + (genAssignmentCode(value, '$$c')) + "}",
+      null, true
+    );
+  }
+
+  function genRadioModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var valueBinding = getBindingAttr(el, 'value') || 'null';
+    valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
+    addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
+    addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
+  }
+
+  function genSelect (
+    el,
+    value,
+    modifiers
+  ) {
+    var number = modifiers && modifiers.number;
+    var selectedVal = "Array.prototype.filter" +
+      ".call($event.target.options,function(o){return o.selected})" +
+      ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
+      "return " + (number ? '_n(val)' : 'val') + "})";
+
+    var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
+    var code = "var $$selectedVal = " + selectedVal + ";";
+    code = code + " " + (genAssignmentCode(value, assignment));
+    addHandler(el, 'change', code, null, true);
+  }
+
+  function genDefaultModel (
+    el,
+    value,
+    modifiers
+  ) {
+    var type = el.attrsMap.type;
+
+    // warn if v-bind:value conflicts with v-model
+    // except for inputs with v-bind:type
+    {
+      var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
+      var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+      if (value$1 && !typeBinding) {
+        var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
+        warn$2(
+          binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
+          'because the latter already expands to a value binding internally',
+          el.rawAttrsMap[binding]
+        );
+      }
+    }
+
+    var ref = modifiers || {};
+    var lazy = ref.lazy;
+    var number = ref.number;
+    var trim = ref.trim;
+    var needCompositionGuard = !lazy && type !== 'range';
+    var event = lazy
+      ? 'change'
+      : type === 'range'
+        ? RANGE_TOKEN
+        : 'input';
+
+    var valueExpression = '$event.target.value';
+    if (trim) {
+      valueExpression = "$event.target.value.trim()";
+    }
+    if (number) {
+      valueExpression = "_n(" + valueExpression + ")";
+    }
+
+    var code = genAssignmentCode(value, valueExpression);
+    if (needCompositionGuard) {
+      code = "if($event.target.composing)return;" + code;
+    }
+
+    addProp(el, 'value', ("(" + value + ")"));
+    addHandler(el, event, code, null, true);
+    if (trim || number) {
+      addHandler(el, 'blur', '$forceUpdate()');
+    }
+  }
+
+  /*  */
+
+  function text (el, dir) {
+    if (dir.value) {
+      addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  /*  */
+
+  function html (el, dir) {
+    if (dir.value) {
+      addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
+    }
+  }
+
+  var directives = {
+    model: model$1,
+    text: text,
+    html: html
+  };
+
+  /*  */
+
+  var baseOptions = {
+    expectHTML: true,
+    modules: modules,
+    directives: directives,
+    isPreTag: isPreTag,
+    isUnaryTag: isUnaryTag,
+    mustUseProp: mustUseProp,
+    canBeLeftOpenTag: canBeLeftOpenTag,
+    isReservedTag: isReservedTag,
+    getTagNamespace: getTagNamespace,
+    staticKeys: genStaticKeys(modules)
+  };
+
+  /*  */
+
+  var isStaticKey;
+  var isPlatformReservedTag;
+
+  var genStaticKeysCached = cached(genStaticKeys$1);
+
+  /**
+   * Goal of the optimizer: walk the generated template AST tree
+   * and detect sub-trees that are purely static, i.e. parts of
+   * the DOM that never needs to change.
+   *
+   * Once we detect these sub-trees, we can:
+   *
+   * 1. Hoist them into constants, so that we no longer need to
+   *    create fresh nodes for them on each re-render;
+   * 2. Completely skip them in the patching process.
+   */
+  function optimize (root, options) {
+    if (!root) { return }
+    isStaticKey = genStaticKeysCached(options.staticKeys || '');
+    isPlatformReservedTag = options.isReservedTag || no;
+    // first pass: mark all non-static nodes.
+    markStatic(root);
+    // second pass: mark static roots.
+    markStaticRoots(root, false);
+  }
+
+  function genStaticKeys$1 (keys) {
+    return makeMap(
+      'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
+      (keys ? ',' + keys : '')
+    )
+  }
+
+  function markStatic (node) {
+    node.static = isStatic(node);
+    if (node.type === 1) {
+      // do not make component slot content static. this avoids
+      // 1. components not able to mutate slot nodes
+      // 2. static slot content fails for hot-reloading
+      if (
+        !isPlatformReservedTag(node.tag) &&
+        node.tag !== 'slot' &&
+        node.attrsMap['inline-template'] == null
+      ) {
+        return
+      }
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        var child = node.children[i];
+        markStatic(child);
+        if (!child.static) {
+          node.static = false;
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          var block = node.ifConditions[i$1].block;
+          markStatic(block);
+          if (!block.static) {
+            node.static = false;
+          }
+        }
+      }
+    }
+  }
+
+  function markStaticRoots (node, isInFor) {
+    if (node.type === 1) {
+      if (node.static || node.once) {
+        node.staticInFor = isInFor;
+      }
+      // For a node to qualify as a static root, it should have children that
+      // are not just static text. Otherwise the cost of hoisting out will
+      // outweigh the benefits and it's better off to just always render it fresh.
+      if (node.static && node.children.length && !(
+        node.children.length === 1 &&
+        node.children[0].type === 3
+      )) {
+        node.staticRoot = true;
+        return
+      } else {
+        node.staticRoot = false;
+      }
+      if (node.children) {
+        for (var i = 0, l = node.children.length; i < l; i++) {
+          markStaticRoots(node.children[i], isInFor || !!node.for);
+        }
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          markStaticRoots(node.ifConditions[i$1].block, isInFor);
+        }
+      }
+    }
+  }
+
+  function isStatic (node) {
+    if (node.type === 2) { // expression
+      return false
+    }
+    if (node.type === 3) { // text
+      return true
+    }
+    return !!(node.pre || (
+      !node.hasBindings && // no dynamic bindings
+      !node.if && !node.for && // not v-if or v-for or v-else
+      !isBuiltInTag(node.tag) && // not a built-in
+      isPlatformReservedTag(node.tag) && // not a component
+      !isDirectChildOfTemplateFor(node) &&
+      Object.keys(node).every(isStaticKey)
+    ))
+  }
+
+  function isDirectChildOfTemplateFor (node) {
+    while (node.parent) {
+      node = node.parent;
+      if (node.tag !== 'template') {
+        return false
+      }
+      if (node.for) {
+        return true
+      }
+    }
+    return false
+  }
+
+  /*  */
+
+  var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+  var fnInvokeRE = /\([^)]*?\);*$/;
+  var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
+
+  // KeyboardEvent.keyCode aliases
+  var keyCodes = {
+    esc: 27,
+    tab: 9,
+    enter: 13,
+    space: 32,
+    up: 38,
+    left: 37,
+    right: 39,
+    down: 40,
+    'delete': [8, 46]
+  };
+
+  // KeyboardEvent.key aliases
+  var keyNames = {
+    // #7880: IE11 and Edge use `Esc` for Escape key name.
+    esc: ['Esc', 'Escape'],
+    tab: 'Tab',
+    enter: 'Enter',
+    // #9112: IE11 uses `Spacebar` for Space key name.
+    space: [' ', 'Spacebar'],
+    // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+    up: ['Up', 'ArrowUp'],
+    left: ['Left', 'ArrowLeft'],
+    right: ['Right', 'ArrowRight'],
+    down: ['Down', 'ArrowDown'],
+    // #9112: IE11 uses `Del` for Delete key name.
+    'delete': ['Backspace', 'Delete', 'Del']
+  };
+
+  // #4868: modifiers that prevent the execution of the listener
+  // need to explicitly return null so that we can determine whether to remove
+  // the listener for .once
+  var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
+
+  var modifierCode = {
+    stop: '$event.stopPropagation();',
+    prevent: '$event.preventDefault();',
+    self: genGuard("$event.target !== $event.currentTarget"),
+    ctrl: genGuard("!$event.ctrlKey"),
+    shift: genGuard("!$event.shiftKey"),
+    alt: genGuard("!$event.altKey"),
+    meta: genGuard("!$event.metaKey"),
+    left: genGuard("'button' in $event && $event.button !== 0"),
+    middle: genGuard("'button' in $event && $event.button !== 1"),
+    right: genGuard("'button' in $event && $event.button !== 2")
+  };
+
+  function genHandlers (
+    events,
+    isNative
+  ) {
+    var prefix = isNative ? 'nativeOn:' : 'on:';
+    var staticHandlers = "";
+    var dynamicHandlers = "";
+    for (var name in events) {
+      var handlerCode = genHandler(events[name]);
+      if (events[name] && events[name].dynamic) {
+        dynamicHandlers += name + "," + handlerCode + ",";
+      } else {
+        staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+      }
+    }
+    staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+    if (dynamicHandlers) {
+      return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+    } else {
+      return prefix + staticHandlers
+    }
+  }
+
+  function genHandler (handler) {
+    if (!handler) {
+      return 'function(){}'
+    }
+
+    if (Array.isArray(handler)) {
+      return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
+    }
+
+    var isMethodPath = simplePathRE.test(handler.value);
+    var isFunctionExpression = fnExpRE.test(handler.value);
+    var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
+
+    if (!handler.modifiers) {
+      if (isMethodPath || isFunctionExpression) {
+        return handler.value
+      }
+      return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
+    } else {
+      var code = '';
+      var genModifierCode = '';
+      var keys = [];
+      for (var key in handler.modifiers) {
+        if (modifierCode[key]) {
+          genModifierCode += modifierCode[key];
+          // left/right
+          if (keyCodes[key]) {
+            keys.push(key);
+          }
+        } else if (key === 'exact') {
+          var modifiers = (handler.modifiers);
+          genModifierCode += genGuard(
+            ['ctrl', 'shift', 'alt', 'meta']
+              .filter(function (keyModifier) { return !modifiers[keyModifier]; })
+              .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
+              .join('||')
+          );
+        } else {
+          keys.push(key);
+        }
+      }
+      if (keys.length) {
+        code += genKeyFilter(keys);
+      }
+      // Make sure modifiers like prevent and stop get executed after key filtering
+      if (genModifierCode) {
+        code += genModifierCode;
+      }
+      var handlerCode = isMethodPath
+        ? ("return " + (handler.value) + ".apply(null, arguments)")
+        : isFunctionExpression
+          ? ("return (" + (handler.value) + ").apply(null, arguments)")
+          : isFunctionInvocation
+            ? ("return " + (handler.value))
+            : handler.value;
+      return ("function($event){" + code + handlerCode + "}")
+    }
+  }
+
+  function genKeyFilter (keys) {
+    return (
+      // make sure the key filters only apply to KeyboardEvents
+      // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+      // key events that do not have keyCode property...
+      "if(!$event.type.indexOf('key')&&" +
+      (keys.map(genFilterCode).join('&&')) + ")return null;"
+    )
+  }
+
+  function genFilterCode (key) {
+    var keyVal = parseInt(key, 10);
+    if (keyVal) {
+      return ("$event.keyCode!==" + keyVal)
+    }
+    var keyCode = keyCodes[key];
+    var keyName = keyNames[key];
+    return (
+      "_k($event.keyCode," +
+      (JSON.stringify(key)) + "," +
+      (JSON.stringify(keyCode)) + "," +
+      "$event.key," +
+      "" + (JSON.stringify(keyName)) +
+      ")"
+    )
+  }
+
+  /*  */
+
+  function on (el, dir) {
+    if (dir.modifiers) {
+      warn("v-on without argument does not support modifiers.");
+    }
+    el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
+  }
+
+  /*  */
+
+  function bind$1 (el, dir) {
+    el.wrapData = function (code) {
+      return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
+    };
+  }
+
+  /*  */
+
+  var baseDirectives = {
+    on: on,
+    bind: bind$1,
+    cloak: noop
+  };
+
+  /*  */
+
+
+
+
+
+  var CodegenState = function CodegenState (options) {
+    this.options = options;
+    this.warn = options.warn || baseWarn;
+    this.transforms = pluckModuleFunction(options.modules, 'transformCode');
+    this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
+    this.directives = extend(extend({}, baseDirectives), options.directives);
+    var isReservedTag = options.isReservedTag || no;
+    this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
+    this.onceId = 0;
+    this.staticRenderFns = [];
+    this.pre = false;
+  };
+
+
+
+  function generate (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    // fix #11483, Root level <script> tags should not be rendered.
+    var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
+    }
+  }
+
+  function genElement (el, state) {
+    if (el.parent) {
+      el.pre = el.pre || el.parent.pre;
+    }
+
+    if (el.staticRoot && !el.staticProcessed) {
+      return genStatic(el, state)
+    } else if (el.once && !el.onceProcessed) {
+      return genOnce(el, state)
+    } else if (el.for && !el.forProcessed) {
+      return genFor(el, state)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
+      return genChildren(el, state) || 'void 0'
+    } else if (el.tag === 'slot') {
+      return genSlot(el, state)
+    } else {
+      // component or element
+      var code;
+      if (el.component) {
+        code = genComponent(el.component, el, state);
+      } else {
+        var data;
+        if (!el.plain || (el.pre && state.maybeComponent(el))) {
+          data = genData$2(el, state);
+        }
+
+        var children = el.inlineTemplate ? null : genChildren(el, state, true);
+        code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      }
+      // module transforms
+      for (var i = 0; i < state.transforms.length; i++) {
+        code = state.transforms[i](el, code);
+      }
+      return code
+    }
+  }
+
+  // hoist static sub-trees out
+  function genStatic (el, state) {
+    el.staticProcessed = true;
+    // Some elements (templates) need to behave differently inside of a v-pre
+    // node.  All pre nodes are static roots, so we can use this as a location to
+    // wrap a state change and reset it upon exiting the pre node.
+    var originalPreState = state.pre;
+    if (el.pre) {
+      state.pre = el.pre;
+    }
+    state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+    state.pre = originalPreState;
+    return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
+  }
+
+  // v-once
+  function genOnce (el, state) {
+    el.onceProcessed = true;
+    if (el.if && !el.ifProcessed) {
+      return genIf(el, state)
+    } else if (el.staticInFor) {
+      var key = '';
+      var parent = el.parent;
+      while (parent) {
+        if (parent.for) {
+          key = parent.key;
+          break
+        }
+        parent = parent.parent;
+      }
+      if (!key) {
+        state.warn(
+          "v-once can only be used inside v-for that is keyed. ",
+          el.rawAttrsMap['v-once']
+        );
+        return genElement(el, state)
+      }
+      return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
+    } else {
+      return genStatic(el, state)
+    }
+  }
+
+  function genIf (
+    el,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    el.ifProcessed = true; // avoid recursion
+    return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
+  }
+
+  function genIfConditions (
+    conditions,
+    state,
+    altGen,
+    altEmpty
+  ) {
+    if (!conditions.length) {
+      return altEmpty || '_e()'
+    }
+
+    var condition = conditions.shift();
+    if (condition.exp) {
+      return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
+    } else {
+      return ("" + (genTernaryExp(condition.block)))
+    }
+
+    // v-if with v-once should generate code like (a)?_m(0):_m(1)
+    function genTernaryExp (el) {
+      return altGen
+        ? altGen(el, state)
+        : el.once
+          ? genOnce(el, state)
+          : genElement(el, state)
+    }
+  }
+
+  function genFor (
+    el,
+    state,
+    altGen,
+    altHelper
+  ) {
+    var exp = el.for;
+    var alias = el.alias;
+    var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
+    var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
+
+    if (state.maybeComponent(el) &&
+      el.tag !== 'slot' &&
+      el.tag !== 'template' &&
+      !el.key
+    ) {
+      state.warn(
+        "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
+        "v-for should have explicit keys. " +
+        "See https://v2.vuejs.org/v2/guide/list.html#Maintaining-State for more info.",
+        el.rawAttrsMap['v-for'],
+        true /* tip */
+      );
+    }
+
+    el.forProcessed = true; // avoid recursion
+    return (altHelper || '_l') + "((" + exp + ")," +
+      "function(" + alias + iterator1 + iterator2 + "){" +
+        "return " + ((altGen || genElement)(el, state)) +
+      '})'
+  }
+
+  function genData$2 (el, state) {
+    var data = '{';
+
+    // directives first.
+    // directives may mutate the el's other properties before they are generated.
+    var dirs = genDirectives(el, state);
+    if (dirs) { data += dirs + ','; }
+
+    // key
+    if (el.key) {
+      data += "key:" + (el.key) + ",";
+    }
+    // ref
+    if (el.ref) {
+      data += "ref:" + (el.ref) + ",";
+    }
+    if (el.refInFor) {
+      data += "refInFor:true,";
+    }
+    // pre
+    if (el.pre) {
+      data += "pre:true,";
+    }
+    // record original tag name for components using "is" attribute
+    if (el.component) {
+      data += "tag:\"" + (el.tag) + "\",";
+    }
+    // module data generation functions
+    for (var i = 0; i < state.dataGenFns.length; i++) {
+      data += state.dataGenFns[i](el);
+    }
+    // attributes
+    if (el.attrs) {
+      data += "attrs:" + (genProps(el.attrs)) + ",";
+    }
+    // DOM props
+    if (el.props) {
+      data += "domProps:" + (genProps(el.props)) + ",";
+    }
+    // event handlers
+    if (el.events) {
+      data += (genHandlers(el.events, false)) + ",";
+    }
+    if (el.nativeEvents) {
+      data += (genHandlers(el.nativeEvents, true)) + ",";
+    }
+    // slot target
+    // only for non-scoped slots
+    if (el.slotTarget && !el.slotScope) {
+      data += "slot:" + (el.slotTarget) + ",";
+    }
+    // scoped slots
+    if (el.scopedSlots) {
+      data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
+    }
+    // component v-model
+    if (el.model) {
+      data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
+    }
+    // inline-template
+    if (el.inlineTemplate) {
+      var inlineTemplate = genInlineTemplate(el, state);
+      if (inlineTemplate) {
+        data += inlineTemplate + ",";
+      }
+    }
+    data = data.replace(/,$/, '') + '}';
+    // v-bind dynamic argument wrap
+    // v-bind with dynamic arguments must be applied using the same v-bind object
+    // merge helper so that class/style/mustUseProp attrs are handled correctly.
+    if (el.dynamicAttrs) {
+      data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+    }
+    // v-bind data wrap
+    if (el.wrapData) {
+      data = el.wrapData(data);
+    }
+    // v-on data wrap
+    if (el.wrapListeners) {
+      data = el.wrapListeners(data);
+    }
+    return data
+  }
+
+  function genDirectives (el, state) {
+    var dirs = el.directives;
+    if (!dirs) { return }
+    var res = 'directives:[';
+    var hasRuntime = false;
+    var i, l, dir, needRuntime;
+    for (i = 0, l = dirs.length; i < l; i++) {
+      dir = dirs[i];
+      needRuntime = true;
+      var gen = state.directives[dir.name];
+      if (gen) {
+        // compile-time directive that manipulates AST.
+        // returns true if it also needs a runtime counterpart.
+        needRuntime = !!gen(el, dir, state.warn);
+      }
+      if (needRuntime) {
+        hasRuntime = true;
+        res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      }
+    }
+    if (hasRuntime) {
+      return res.slice(0, -1) + ']'
+    }
+  }
+
+  function genInlineTemplate (el, state) {
+    var ast = el.children[0];
+    if (el.children.length !== 1 || ast.type !== 1) {
+      state.warn(
+        'Inline-template components must have exactly one child element.',
+        { start: el.start }
+      );
+    }
+    if (ast && ast.type === 1) {
+      var inlineRenderFns = generate(ast, state.options);
+      return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
+    }
+  }
+
+  function genScopedSlots (
+    el,
+    slots,
+    state
+  ) {
+    // by default scoped slots are considered "stable", this allows child
+    // components with only scoped slots to skip forced updates from parent.
+    // but in some cases we have to bail-out of this optimization
+    // for example if the slot contains dynamic names, has v-if or v-for on them...
+    var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+      var slot = slots[key];
+      return (
+        slot.slotTargetDynamic ||
+        slot.if ||
+        slot.for ||
+        containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+      )
+    });
+
+    // #9534: if a component with scoped slots is inside a conditional branch,
+    // it's possible for the same component to be reused but with different
+    // compiled slot content. To avoid that, we generate a unique key based on
+    // the generated code of all the slot contents.
+    var needsKey = !!el.if;
+
+    // OR when it is inside another scoped slot or v-for (the reactivity may be
+    // disconnected due to the intermediate scope variable)
+    // #9438, #9506
+    // TODO: this can be further optimized by properly analyzing in-scope bindings
+    // and skip force updating ones that do not actually use scope variables.
+    if (!needsForceUpdate) {
+      var parent = el.parent;
+      while (parent) {
+        if (
+          (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+          parent.for
+        ) {
+          needsForceUpdate = true;
+          break
+        }
+        if (parent.if) {
+          needsKey = true;
+        }
+        parent = parent.parent;
+      }
+    }
+
+    var generatedSlots = Object.keys(slots)
+      .map(function (key) { return genScopedSlot(slots[key], state); })
+      .join(',');
+
+    return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+  }
+
+  function hash(str) {
+    var hash = 5381;
+    var i = str.length;
+    while(i) {
+      hash = (hash * 33) ^ str.charCodeAt(--i);
+    }
+    return hash >>> 0
+  }
+
+  function containsSlotChild (el) {
+    if (el.type === 1) {
+      if (el.tag === 'slot') {
+        return true
+      }
+      return el.children.some(containsSlotChild)
+    }
+    return false
+  }
+
+  function genScopedSlot (
+    el,
+    state
+  ) {
+    var isLegacySyntax = el.attrsMap['slot-scope'];
+    if (el.if && !el.ifProcessed && !isLegacySyntax) {
+      return genIf(el, state, genScopedSlot, "null")
+    }
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genScopedSlot)
+    }
+    var slotScope = el.slotScope === emptySlotScopeToken
+      ? ""
+      : String(el.slotScope);
+    var fn = "function(" + slotScope + "){" +
+      "return " + (el.tag === 'template'
+        ? el.if && isLegacySyntax
+          ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
+          : genChildren(el, state) || 'undefined'
+        : genElement(el, state)) + "}";
+    // reverse proxy v-slot without scope on this.$slots
+    var reverseProxy = slotScope ? "" : ",proxy:true";
+    return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
+  }
+
+  function genChildren (
+    el,
+    state,
+    checkSkip,
+    altGenElement,
+    altGenNode
+  ) {
+    var children = el.children;
+    if (children.length) {
+      var el$1 = children[0];
+      // optimize single v-for
+      if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot'
+      ) {
+        var normalizationType = checkSkip
+          ? state.maybeComponent(el$1) ? ",1" : ",0"
+          : "";
+        return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
+      }
+      var normalizationType$1 = checkSkip
+        ? getNormalizationType(children, state.maybeComponent)
+        : 0;
+      var gen = altGenNode || genNode;
+      return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
+    }
+  }
+
+  // determine the normalization needed for the children array.
+  // 0: no normalization needed
+  // 1: simple normalization needed (possible 1-level deep nested array)
+  // 2: full normalization needed
+  function getNormalizationType (
+    children,
+    maybeComponent
+  ) {
+    var res = 0;
+    for (var i = 0; i < children.length; i++) {
+      var el = children[i];
+      if (el.type !== 1) {
+        continue
+      }
+      if (needsNormalization(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
+        res = 2;
+        break
+      }
+      if (maybeComponent(el) ||
+          (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
+        res = 1;
+      }
+    }
+    return res
+  }
+
+  function needsNormalization (el) {
+    return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
+  }
+
+  function genNode (node, state) {
+    if (node.type === 1) {
+      return genElement(node, state)
+    } else if (node.type === 3 && node.isComment) {
+      return genComment(node)
+    } else {
+      return genText(node)
+    }
+  }
+
+  function genText (text) {
+    return ("_v(" + (text.type === 2
+      ? text.expression // no need for () because already wrapped in _s()
+      : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
+  }
+
+  function genComment (comment) {
+    return ("_e(" + (JSON.stringify(comment.text)) + ")")
+  }
+
+  function genSlot (el, state) {
+    var slotName = el.slotName || '"default"';
+    var children = genChildren(el, state);
+    var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+    var attrs = el.attrs || el.dynamicAttrs
+      ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+          // slot props are camelized
+          name: camelize(attr.name),
+          value: attr.value,
+          dynamic: attr.dynamic
+        }); }))
+      : null;
+    var bind$$1 = el.attrsMap['v-bind'];
+    if ((attrs || bind$$1) && !children) {
+      res += ",null";
+    }
+    if (attrs) {
+      res += "," + attrs;
+    }
+    if (bind$$1) {
+      res += (attrs ? '' : ',null') + "," + bind$$1;
+    }
+    return res + ')'
+  }
+
+  // componentName is el.component, take it as argument to shun flow's pessimistic refinement
+  function genComponent (
+    componentName,
+    el,
+    state
+  ) {
+    var children = el.inlineTemplate ? null : genChildren(el, state, true);
+    return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
+  }
+
+  function genProps (props) {
+    var staticProps = "";
+    var dynamicProps = "";
+    for (var i = 0; i < props.length; i++) {
+      var prop = props[i];
+      var value = transformSpecialNewlines(prop.value);
+      if (prop.dynamic) {
+        dynamicProps += (prop.name) + "," + value + ",";
+      } else {
+        staticProps += "\"" + (prop.name) + "\":" + value + ",";
+      }
+    }
+    staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+    if (dynamicProps) {
+      return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+    } else {
+      return staticProps
+    }
+  }
+
+  // #3895, #4268
+  function transformSpecialNewlines (text) {
+    return text
+      .replace(/\u2028/g, '\\u2028')
+      .replace(/\u2029/g, '\\u2029')
+  }
+
+  /*  */
+
+
+
+  // these keywords should not appear inside expressions, but operators like
+  // typeof, instanceof and in are allowed
+  var prohibitedKeywordRE = new RegExp('\\b' + (
+    'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
+    'super,throw,while,yield,delete,export,import,return,switch,default,' +
+    'extends,finally,continue,debugger,function,arguments'
+  ).split(',').join('\\b|\\b') + '\\b');
+
+  // these unary operators should not be used as property/method names
+  var unaryOperatorsRE = new RegExp('\\b' + (
+    'delete,typeof,void'
+  ).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+
+  // strip strings in expressions
+  var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+
+  // detect problematic expressions in a template
+  function detectErrors (ast, warn) {
+    if (ast) {
+      checkNode(ast, warn);
+    }
+  }
+
+  function checkNode (node, warn) {
+    if (node.type === 1) {
+      for (var name in node.attrsMap) {
+        if (dirRE.test(name)) {
+          var value = node.attrsMap[name];
+          if (value) {
+            var range = node.rawAttrsMap[name];
+            if (name === 'v-for') {
+              checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+            } else if (name === 'v-slot' || name[0] === '#') {
+              checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
+            } else if (onRE.test(name)) {
+              checkEvent(value, (name + "=\"" + value + "\""), warn, range);
+            } else {
+              checkExpression(value, (name + "=\"" + value + "\""), warn, range);
+            }
+          }
+        }
+      }
+      if (node.children) {
+        for (var i = 0; i < node.children.length; i++) {
+          checkNode(node.children[i], warn);
+        }
+      }
+    } else if (node.type === 2) {
+      checkExpression(node.expression, node.text, warn, node);
+    }
+  }
+
+  function checkEvent (exp, text, warn, range) {
+    var stripped = exp.replace(stripStringRE, '');
+    var keywordMatch = stripped.match(unaryOperatorsRE);
+    if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+      warn(
+        "avoid using JavaScript unary operator as property name: " +
+        "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+        range
+      );
+    }
+    checkExpression(exp, text, warn, range);
+  }
+
+  function checkFor (node, text, warn, range) {
+    checkExpression(node.for || '', text, warn, range);
+    checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+    checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+    checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
+  }
+
+  function checkIdentifier (
+    ident,
+    type,
+    text,
+    warn,
+    range
+  ) {
+    if (typeof ident === 'string') {
+      try {
+        new Function(("var " + ident + "=_"));
+      } catch (e) {
+        warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
+      }
+    }
+  }
+
+  function checkExpression (exp, text, warn, range) {
+    try {
+      new Function(("return " + exp));
+    } catch (e) {
+      var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
+      if (keywordMatch) {
+        warn(
+          "avoid using JavaScript keyword as property name: " +
+          "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+          range
+        );
+      } else {
+        warn(
+          "invalid expression: " + (e.message) + " in\n\n" +
+          "    " + exp + "\n\n" +
+          "  Raw expression: " + (text.trim()) + "\n",
+          range
+        );
+      }
+    }
+  }
+
+  function checkFunctionParameterExpression (exp, text, warn, range) {
+    try {
+      new Function(exp, '');
+    } catch (e) {
+      warn(
+        "invalid function parameter expression: " + (e.message) + " in\n\n" +
+        "    " + exp + "\n\n" +
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
+      );
+    }
+  }
+
+  /*  */
+
+  var range = 2;
+
+  function generateCodeFrame (
+    source,
+    start,
+    end
+  ) {
+    if ( start === void 0 ) start = 0;
+    if ( end === void 0 ) end = source.length;
+
+    var lines = source.split(/\r?\n/);
+    var count = 0;
+    var res = [];
+    for (var i = 0; i < lines.length; i++) {
+      count += lines[i].length + 1;
+      if (count >= start) {
+        for (var j = i - range; j <= i + range || end > count; j++) {
+          if (j < 0 || j >= lines.length) { continue }
+          res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+          var lineLength = lines[j].length;
+          if (j === i) {
+            // push underline
+            var pad = start - (count - lineLength) + 1;
+            var length = end > count ? lineLength - pad : end - start;
+            res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+          } else if (j > i) {
+            if (end > count) {
+              var length$1 = Math.min(end - count, lineLength);
+              res.push("   |  " + repeat$1("^", length$1));
+            }
+            count += lineLength + 1;
+          }
+        }
+        break
+      }
+    }
+    return res.join('\n')
+  }
+
+  function repeat$1 (str, n) {
+    var result = '';
+    if (n > 0) {
+      while (true) { // eslint-disable-line
+        if (n & 1) { result += str; }
+        n >>>= 1;
+        if (n <= 0) { break }
+        str += str;
+      }
+    }
+    return result
+  }
+
+  /*  */
+
+
+
+  function createFunction (code, errors) {
+    try {
+      return new Function(code)
+    } catch (err) {
+      errors.push({ err: err, code: code });
+      return noop
+    }
+  }
+
+  function createCompileToFunctionFn (compile) {
+    var cache = Object.create(null);
+
+    return function compileToFunctions (
+      template,
+      options,
+      vm
+    ) {
+      options = extend({}, options);
+      var warn$$1 = options.warn || warn;
+      delete options.warn;
+
+      /* istanbul ignore if */
+      {
+        // detect possible CSP restriction
+        try {
+          new Function('return 1');
+        } catch (e) {
+          if (e.toString().match(/unsafe-eval|CSP/)) {
+            warn$$1(
+              'It seems you are using the standalone build of Vue.js in an ' +
+              'environment with Content Security Policy that prohibits unsafe-eval. ' +
+              'The template compiler cannot work in this environment. Consider ' +
+              'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
+              'templates into render functions.'
+            );
+          }
+        }
+      }
+
+      // check cache
+      var key = options.delimiters
+        ? String(options.delimiters) + template
+        : template;
+      if (cache[key]) {
+        return cache[key]
+      }
+
+      // compile
+      var compiled = compile(template, options);
+
+      // check compilation errors/tips
+      {
+        if (compiled.errors && compiled.errors.length) {
+          if (options.outputSourceRange) {
+            compiled.errors.forEach(function (e) {
+              warn$$1(
+                "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+                generateCodeFrame(template, e.start, e.end),
+                vm
+              );
+            });
+          } else {
+            warn$$1(
+              "Error compiling template:\n\n" + template + "\n\n" +
+              compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+              vm
+            );
+          }
+        }
+        if (compiled.tips && compiled.tips.length) {
+          if (options.outputSourceRange) {
+            compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+          } else {
+            compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+          }
+        }
+      }
+
+      // turn code into functions
+      var res = {};
+      var fnGenErrors = [];
+      res.render = createFunction(compiled.render, fnGenErrors);
+      res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
+        return createFunction(code, fnGenErrors)
+      });
+
+      // check function generation errors.
+      // this should only happen if there is a bug in the compiler itself.
+      // mostly for codegen development use
+      /* istanbul ignore if */
+      {
+        if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
+          warn$$1(
+            "Failed to generate render function:\n\n" +
+            fnGenErrors.map(function (ref) {
+              var err = ref.err;
+              var code = ref.code;
+
+              return ((err.toString()) + " in\n\n" + code + "\n");
+          }).join('\n'),
+            vm
+          );
+        }
+      }
+
+      return (cache[key] = res)
+    }
+  }
+
+  /*  */
+
+  function createCompilerCreator (baseCompile) {
+    return function createCompiler (baseOptions) {
+      function compile (
+        template,
+        options
+      ) {
+        var finalOptions = Object.create(baseOptions);
+        var errors = [];
+        var tips = [];
+
+        var warn = function (msg, range, tip) {
+          (tip ? tips : errors).push(msg);
+        };
+
+        if (options) {
+          if (options.outputSourceRange) {
+            // $flow-disable-line
+            var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+            warn = function (msg, range, tip) {
+              var data = { msg: msg };
+              if (range) {
+                if (range.start != null) {
+                  data.start = range.start + leadingSpaceLength;
+                }
+                if (range.end != null) {
+                  data.end = range.end + leadingSpaceLength;
+                }
+              }
+              (tip ? tips : errors).push(data);
+            };
+          }
+          // merge custom modules
+          if (options.modules) {
+            finalOptions.modules =
+              (baseOptions.modules || []).concat(options.modules);
+          }
+          // merge custom directives
+          if (options.directives) {
+            finalOptions.directives = extend(
+              Object.create(baseOptions.directives || null),
+              options.directives
+            );
+          }
+          // copy other options
+          for (var key in options) {
+            if (key !== 'modules' && key !== 'directives') {
+              finalOptions[key] = options[key];
+            }
+          }
+        }
 
-function checkForAliasModel (el, value) {
-  var _el = el;
-  while (_el) {
-    if (_el.for && _el.alias === value) {
-      warn$1(
-        "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-        "You are binding v-model directly to a v-for iteration alias. " +
-        "This will not be able to modify the v-for source array because " +
-        "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
-      );
-    }
-    _el = _el.parent;
-  }
-}
-
-/*  */
-
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
-function preTransformNode (el, options) {
-  if (el.tag === 'input') {
-    var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
-      var ifCondition = getAndRemoveAttr(el, 'v-if', true);
-      var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
-      var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
-      var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true);
-      // 1. checkbox
-      var branch0 = cloneASTElement(el);
-      // process for on the main node
-      processFor(branch0);
-      addRawAttr(branch0, 'type', 'checkbox');
-      processElement(branch0, options);
-      branch0.processed = true; // prevent it from double-processed
-      branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
-      addIfCondition(branch0, {
-        exp: branch0.if,
-        block: branch0
-      });
-      // 2. add radio else-if condition
-      var branch1 = cloneASTElement(el);
-      getAndRemoveAttr(branch1, 'v-for', true);
-      addRawAttr(branch1, 'type', 'radio');
-      processElement(branch1, options);
-      addIfCondition(branch0, {
-        exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
-        block: branch1
-      });
-      // 3. other
-      var branch2 = cloneASTElement(el);
-      getAndRemoveAttr(branch2, 'v-for', true);
-      addRawAttr(branch2, ':type', typeBinding);
-      processElement(branch2, options);
-      addIfCondition(branch0, {
-        exp: ifCondition,
-        block: branch2
-      });
+        finalOptions.warn = warn;
 
-      if (hasElse) {
-        branch0.else = true;
-      } else if (elseIfCondition) {
-        branch0.elseif = elseIfCondition;
+        var compiled = baseCompile(template.trim(), finalOptions);
+        {
+          detectErrors(compiled.ast, warn);
+        }
+        compiled.errors = errors;
+        compiled.tips = tips;
+        return compiled
       }
 
-      return branch0
+      return {
+        compile: compile,
+        compileToFunctions: createCompileToFunctionFn(compile)
+      }
     }
   }
-}
-
-function cloneASTElement (el) {
-  return createASTElement(el.tag, el.attrsList.slice(), el.parent)
-}
-
-var model = {
-  preTransformNode: preTransformNode
-};
 
-var modules = [
-  klass,
-  style,
-  model
-];
+  /*  */
 
-/*  */
+  // `createCompilerCreator` allows creating compilers that use alternative
+  // parser/optimizer/codegen, e.g the SSR optimizing compiler.
+  // Here we just export a default compiler using the default parts.
+  var createCompiler = createCompilerCreator(function baseCompile (
+    template,
+    options
+  ) {
+    var ast = parse(template.trim(), options);
+    if (options.optimize !== false) {
+      optimize(ast, options);
+    }
+    var code = generate(ast, options);
+    return {
+      ast: ast,
+      render: code.render,
+      staticRenderFns: code.staticRenderFns
+    }
+  });
 
-var warn$2;
+  /*  */
+
+  var ref = createCompiler(baseOptions);
+  var compile = ref.compile;
+  var compileToFunctions = ref.compileToFunctions;
+
+  /*  */
+
+  var isAttr = makeMap(
+    'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
+    'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
+    'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+    'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+    'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
+    'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
+    'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
+    'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
+    'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
+    'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
+    'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
+    'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
+    'target,title,usemap,value,width,wrap'
+  );
 
-// in some cases, the event used has to be determined at runtime
-// so we used some reserved tokens during compile.
-var RANGE_TOKEN = '__r';
+  /* istanbul ignore next */
+  var isRenderableAttr = function (name) {
+    return (
+      isAttr(name) ||
+      name.indexOf('data-') === 0 ||
+      name.indexOf('aria-') === 0
+    )
+  };
 
+  var propsToAttrMap = {
+    acceptCharset: 'accept-charset',
+    className: 'class',
+    htmlFor: 'for',
+    httpEquiv: 'http-equiv'
+  };
 
-function model$1 (
-  el,
-  dir,
-  _warn
-) {
-  warn$2 = _warn;
-  var value = dir.value;
-  var modifiers = dir.modifiers;
-  var tag = el.tag;
-  var type = el.attrsMap.type;
+  var ESC = {
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    '&': '&amp;'
+  };
 
-  {
-    // inputs with type="file" are read only and setting the input's
-    // value will throw an error.
-    if (tag === 'input' && type === 'file') {
-      warn$2(
-        "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
-      );
-    }
+  function escape (s) {
+    return s.replace(/[<>"&]/g, escapeChar)
   }
 
-  if (el.component) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else if (tag === 'select') {
-    genSelect(el, value, modifiers);
-  } else if (tag === 'input' && type === 'checkbox') {
-    genCheckboxModel(el, value, modifiers);
-  } else if (tag === 'input' && type === 'radio') {
-    genRadioModel(el, value, modifiers);
-  } else if (tag === 'input' || tag === 'textarea') {
-    genDefaultModel(el, value, modifiers);
-  } else if (!config.isReservedTag(tag)) {
-    genComponentModel(el, value, modifiers);
-    // component v-model doesn't need extra runtime
-    return false
-  } else {
-    warn$2(
-      "<" + (el.tag) + " v-model=\"" + value + "\">: " +
-      "v-model is not supported on this element type. " +
-      'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
-    );
+  function escapeChar (a) {
+    return ESC[a] || a
   }
 
-  // ensure runtime directive metadata
-  return true
-}
-
-function genCheckboxModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
-  var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
-  addProp(el, 'checked',
-    "Array.isArray(" + value + ")" +
-    "?_i(" + value + "," + valueBinding + ")>-1" + (
-      trueValueBinding === 'true'
-        ? (":(" + value + ")")
-        : (":_q(" + value + "," + trueValueBinding + ")")
-    )
-  );
-  addHandler(el, 'change',
-    "var $$a=" + value + "," +
-        '$$el=$event.target,' +
-        "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" +
-    'if(Array.isArray($$a)){' +
-      "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
-          '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
-    "}else{" + (genAssignmentCode(value, '$$c')) + "}",
-    null, true
-  );
-}
-
-function genRadioModel (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var valueBinding = getBindingAttr(el, 'value') || 'null';
-  valueBinding = number ? ("_n(" + valueBinding + ")") : valueBinding;
-  addProp(el, 'checked', ("_q(" + value + "," + valueBinding + ")"));
-  addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
-}
-
-function genSelect (
-  el,
-  value,
-  modifiers
-) {
-  var number = modifiers && modifiers.number;
-  var selectedVal = "Array.prototype.filter" +
-    ".call($event.target.options,function(o){return o.selected})" +
-    ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" +
-    "return " + (number ? '_n(val)' : 'val') + "})";
-
-  var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
-  var code = "var $$selectedVal = " + selectedVal + ";";
-  code = code + " " + (genAssignmentCode(value, assignment));
-  addHandler(el, 'change', code, null, true);
-}
-
-function genDefaultModel (
-  el,
-  value,
-  modifiers
-) {
-  var type = el.attrsMap.type;
-
-  // warn if v-bind:value conflicts with v-model
-  {
-    var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
-      var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
-      warn$2(
-        binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
-      );
-    }
-  }
+  /*  */
 
-  var ref = modifiers || {};
-  var lazy = ref.lazy;
-  var number = ref.number;
-  var trim = ref.trim;
-  var needCompositionGuard = !lazy && type !== 'range';
-  var event = lazy
-    ? 'change'
-    : type === 'range'
-      ? RANGE_TOKEN
-      : 'input';
-
-  var valueExpression = '$event.target.value';
-  if (trim) {
-    valueExpression = "$event.target.value.trim()";
-  }
-  if (number) {
-    valueExpression = "_n(" + valueExpression + ")";
-  }
-
-  var code = genAssignmentCode(value, valueExpression);
-  if (needCompositionGuard) {
-    code = "if($event.target.composing)return;" + code;
-  }
-
-  addProp(el, 'value', ("(" + value + ")"));
-  addHandler(el, event, code, null, true);
-  if (trim || number) {
-    addHandler(el, 'blur', '$forceUpdate()');
-  }
-}
-
-/*  */
-
-function text (el, dir) {
-  if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-/*  */
-
-function html (el, dir) {
-  if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
-  }
-}
-
-var directives = {
-  model: model$1,
-  text: text,
-  html: html
-};
-
-/*  */
-
-var baseOptions = {
-  expectHTML: true,
-  modules: modules,
-  directives: directives,
-  isPreTag: isPreTag,
-  isUnaryTag: isUnaryTag,
-  mustUseProp: mustUseProp,
-  canBeLeftOpenTag: canBeLeftOpenTag,
-  isReservedTag: isReservedTag,
-  getTagNamespace: getTagNamespace,
-  staticKeys: genStaticKeys(modules)
-};
-
-/*  */
-
-var isStaticKey;
-var isPlatformReservedTag;
-
-var genStaticKeysCached = cached(genStaticKeys$1);
-
-/**
- * Goal of the optimizer: walk the generated template AST tree
- * and detect sub-trees that are purely static, i.e. parts of
- * the DOM that never needs to change.
- *
- * Once we detect these sub-trees, we can:
- *
- * 1. Hoist them into constants, so that we no longer need to
- *    create fresh nodes for them on each re-render;
- * 2. Completely skip them in the patching process.
- */
-function optimize (root, options) {
-  if (!root) { return }
-  isStaticKey = genStaticKeysCached(options.staticKeys || '');
-  isPlatformReservedTag = options.isReservedTag || no;
-  // first pass: mark all non-static nodes.
-  markStatic(root);
-  // second pass: mark static roots.
-  markStaticRoots(root, false);
-}
-
-function genStaticKeys$1 (keys) {
-  return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
-    (keys ? ',' + keys : '')
-  )
-}
-
-function markStatic (node) {
-  node.static = isStatic(node);
-  if (node.type === 1) {
-    // do not make component slot content static. this avoids
-    // 1. components not able to mutate slot nodes
-    // 2. static slot content fails for hot-reloading
-    if (
-      !isPlatformReservedTag(node.tag) &&
-      node.tag !== 'slot' &&
-      node.attrsMap['inline-template'] == null
-    ) {
-      return
-    }
-    for (var i = 0, l = node.children.length; i < l; i++) {
-      var child = node.children[i];
-      markStatic(child);
-      if (!child.static) {
-        node.static = false;
-      }
-    }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        var block = node.ifConditions[i$1].block;
-        markStatic(block);
-        if (!block.static) {
-          node.static = false;
-        }
-      }
-    }
-  }
-}
 
-function markStaticRoots (node, isInFor) {
-  if (node.type === 1) {
-    if (node.static || node.once) {
-      node.staticInFor = isInFor;
-    }
-    // For a node to qualify as a static root, it should have children that
-    // are not just static text. Otherwise the cost of hoisting out will
-    // outweigh the benefits and it's better off to just always render it fresh.
-    if (node.static && node.children.length && !(
-      node.children.length === 1 &&
-      node.children[0].type === 3
-    )) {
-      node.staticRoot = true;
-      return
-    } else {
-      node.staticRoot = false;
-    }
-    if (node.children) {
-      for (var i = 0, l = node.children.length; i < l; i++) {
-        markStaticRoots(node.children[i], isInFor || !!node.for);
-      }
-    }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        markStaticRoots(node.ifConditions[i$1].block, isInFor);
-      }
-    }
-  }
-}
 
-function isStatic (node) {
-  if (node.type === 2) { // expression
-    return false
-  }
-  if (node.type === 3) { // text
-    return true
-  }
-  return !!(node.pre || (
-    !node.hasBindings && // no dynamic bindings
-    !node.if && !node.for && // not v-if or v-for or v-else
-    !isBuiltInTag(node.tag) && // not a built-in
-    isPlatformReservedTag(node.tag) && // not a component
-    !isDirectChildOfTemplateFor(node) &&
-    Object.keys(node).every(isStaticKey)
-  ))
-}
-
-function isDirectChildOfTemplateFor (node) {
-  while (node.parent) {
-    node = node.parent;
-    if (node.tag !== 'template') {
-      return false
-    }
-    if (node.for) {
-      return true
-    }
-  }
-  return false
-}
-
-/*  */
-
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
-
-// keyCode aliases
-var keyCodes = {
-  esc: 27,
-  tab: 9,
-  enter: 13,
-  space: 32,
-  up: 38,
-  left: 37,
-  right: 39,
-  down: 40,
-  'delete': [8, 46]
-};
-
-// #4868: modifiers that prevent the execution of the listener
-// need to explicitly return null so that we can determine whether to remove
-// the listener for .once
-var genGuard = function (condition) { return ("if(" + condition + ")return null;"); };
-
-var modifierCode = {
-  stop: '$event.stopPropagation();',
-  prevent: '$event.preventDefault();',
-  self: genGuard("$event.target !== $event.currentTarget"),
-  ctrl: genGuard("!$event.ctrlKey"),
-  shift: genGuard("!$event.shiftKey"),
-  alt: genGuard("!$event.altKey"),
-  meta: genGuard("!$event.metaKey"),
-  left: genGuard("'button' in $event && $event.button !== 0"),
-  middle: genGuard("'button' in $event && $event.button !== 1"),
-  right: genGuard("'button' in $event && $event.button !== 2")
-};
-
-function genHandlers (
-  events,
-  isNative,
-  warn
-) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
-  for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
-  }
-  return res.slice(0, -1) + '}'
-}
-
-function genHandler (
-  name,
-  handler
-) {
-  if (!handler) {
-    return 'function(){}'
-  }
-
-  if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
-  }
-
-  var isMethodPath = simplePathRE.test(handler.value);
-  var isFunctionExpression = fnExpRE.test(handler.value);
-
-  if (!handler.modifiers) {
-    if (isMethodPath || isFunctionExpression) {
-      return handler.value
-    }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
-  } else {
-    var code = '';
-    var genModifierCode = '';
-    var keys = [];
-    for (var key in handler.modifiers) {
-      if (modifierCode[key]) {
-        genModifierCode += modifierCode[key];
-        // left/right
-        if (keyCodes[key]) {
-          keys.push(key);
+
+  var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
+
+  // let the model AST transform translate v-model into appropriate
+  // props bindings
+  function applyModelTransform (el, state) {
+    if (el.directives) {
+      for (var i = 0; i < el.directives.length; i++) {
+        var dir = el.directives[i];
+        if (dir.name === 'model') {
+          state.directives.model(el, dir, state.warn);
+          // remove value for textarea as its converted to text
+          if (el.tag === 'textarea' && el.props) {
+            el.props = el.props.filter(function (p) { return p.name !== 'value'; });
+          }
+          break
         }
-      } else if (key === 'exact') {
-        var modifiers = (handler.modifiers);
-        genModifierCode += genGuard(
-          ['ctrl', 'shift', 'alt', 'meta']
-            .filter(function (keyModifier) { return !modifiers[keyModifier]; })
-            .map(function (keyModifier) { return ("$event." + keyModifier + "Key"); })
-            .join('||')
-        );
-      } else {
-        keys.push(key);
       }
     }
-    if (keys.length) {
-      code += genKeyFilter(keys);
-    }
-    // Make sure modifiers like prevent and stop get executed after key filtering
-    if (genModifierCode) {
-      code += genModifierCode;
-    }
-    var handlerCode = isMethodPath
-      ? handler.value + '($event)'
-      : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
-    return ("function($event){" + code + handlerCode + "}")
   }
-}
 
-function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
-}
+  function genAttrSegments (
+    attrs
+  ) {
+    return attrs.map(function (ref) {
+      var name = ref.name;
+      var value = ref.value;
 
-function genFilterCode (key) {
-  var keyVal = parseInt(key, 10);
-  if (keyVal) {
-    return ("$event.keyCode!==" + keyVal)
+      return genAttrSegment(name, value);
+    })
   }
-  var code = keyCodes[key];
-  return (
-    "_k($event.keyCode," +
-    (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
-  )
-}
-
-/*  */
 
-function on (el, dir) {
-  if ("development" !== 'production' && dir.modifiers) {
-    warn("v-on without argument does not support modifiers.");
+  function genDOMPropSegments (
+    props,
+    attrs
+  ) {
+    var segments = [];
+    props.forEach(function (ref) {
+      var name = ref.name;
+      var value = ref.value;
+
+      name = propsToAttrMap[name] || name.toLowerCase();
+      if (isRenderableAttr(name) &&
+        !(attrs && attrs.some(function (a) { return a.name === name; }))
+      ) {
+        segments.push(genAttrSegment(name, value));
+      }
+    });
+    return segments
   }
-  el.wrapListeners = function (code) { return ("_g(" + code + "," + (dir.value) + ")"); };
-}
 
-/*  */
-
-function bind$1 (el, dir) {
-  el.wrapData = function (code) {
-    return ("_b(" + code + ",'" + (el.tag) + "'," + (dir.value) + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")")
-  };
-}
-
-/*  */
-
-var baseDirectives = {
-  on: on,
-  bind: bind$1,
-  cloak: noop
-};
-
-/*  */
-
-var CodegenState = function CodegenState (options) {
-  this.options = options;
-  this.warn = options.warn || baseWarn;
-  this.transforms = pluckModuleFunction(options.modules, 'transformCode');
-  this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
-  this.directives = extend(extend({}, baseDirectives), options.directives);
-  var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
-  this.onceId = 0;
-  this.staticRenderFns = [];
-};
-
-
-
-function generate (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genElement (el, state) {
-  if (el.staticRoot && !el.staticProcessed) {
-    return genStatic(el, state)
-  } else if (el.once && !el.onceProcessed) {
-    return genOnce(el, state)
-  } else if (el.for && !el.forProcessed) {
-    return genFor(el, state)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return genChildren(el, state) || 'void 0'
-  } else if (el.tag === 'slot') {
-    return genSlot(el, state)
-  } else {
-    // component or element
-    var code;
-    if (el.component) {
-      code = genComponent(el.component, el, state);
+  function genAttrSegment (name, value) {
+    if (plainStringRE.test(value)) {
+      // force double quote
+      value = value.replace(/^'|'$/g, '"');
+      // force enumerated attr to "true"
+      if (isEnumeratedAttr(name) && value !== "\"false\"") {
+        value = "\"true\"";
+      }
+      return {
+        type: RAW,
+        value: isBooleanAttr(name)
+          ? (" " + name + "=\"" + name + "\"")
+          : value === '""'
+            ? (" " + name)
+            : (" " + name + "=\"" + (JSON.parse(value)) + "\"")
+      }
     } else {
-      var data = el.plain ? undefined : genData$2(el, state);
-
-      var children = el.inlineTemplate ? null : genChildren(el, state, true);
-      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
-    }
-    // module transforms
-    for (var i = 0; i < state.transforms.length; i++) {
-      code = state.transforms[i](el, code);
-    }
-    return code
-  }
-}
-
-// hoist static sub-trees out
-function genStatic (el, state) {
-  el.staticProcessed = true;
-  state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
-  return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
-}
-
-// v-once
-function genOnce (el, state) {
-  el.onceProcessed = true;
-  if (el.if && !el.ifProcessed) {
-    return genIf(el, state)
-  } else if (el.staticInFor) {
-    var key = '';
-    var parent = el.parent;
-    while (parent) {
-      if (parent.for) {
-        key = parent.key;
-        break
+      return {
+        type: EXPRESSION,
+        value: ("_ssrAttr(" + (JSON.stringify(name)) + "," + value + ")")
       }
-      parent = parent.parent;
-    }
-    if (!key) {
-      "development" !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
-      );
-      return genElement(el, state)
     }
-    return ("_o(" + (genElement(el, state)) + "," + (state.onceId++) + "," + key + ")")
-  } else {
-    return genStatic(el, state)
-  }
-}
-
-function genIf (
-  el,
-  state,
-  altGen,
-  altEmpty
-) {
-  el.ifProcessed = true; // avoid recursion
-  return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty)
-}
-
-function genIfConditions (
-  conditions,
-  state,
-  altGen,
-  altEmpty
-) {
-  if (!conditions.length) {
-    return altEmpty || '_e()'
-  }
-
-  var condition = conditions.shift();
-  if (condition.exp) {
-    return ("(" + (condition.exp) + ")?" + (genTernaryExp(condition.block)) + ":" + (genIfConditions(conditions, state, altGen, altEmpty)))
-  } else {
-    return ("" + (genTernaryExp(condition.block)))
-  }
-
-  // v-if with v-once should generate code like (a)?_m(0):_m(1)
-  function genTernaryExp (el) {
-    return altGen
-      ? altGen(el, state)
-      : el.once
-        ? genOnce(el, state)
-        : genElement(el, state)
-  }
-}
-
-function genFor (
-  el,
-  state,
-  altGen,
-  altHelper
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-
-  if ("development" !== 'production' &&
-    state.maybeComponent(el) &&
-    el.tag !== 'slot' &&
-    el.tag !== 'template' &&
-    !el.key
-  ) {
-    state.warn(
-      "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
-      "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
-      true /* tip */
-    );
   }
 
-  el.forProcessed = true; // avoid recursion
-  return (altHelper || '_l') + "((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + ((altGen || genElement)(el, state)) +
-    '})'
-}
-
-function genData$2 (el, state) {
-  var data = '{';
-
-  // directives first.
-  // directives may mutate the el's other properties before they are generated.
-  var dirs = genDirectives(el, state);
-  if (dirs) { data += dirs + ','; }
-
-  // key
-  if (el.key) {
-    data += "key:" + (el.key) + ",";
-  }
-  // ref
-  if (el.ref) {
-    data += "ref:" + (el.ref) + ",";
-  }
-  if (el.refInFor) {
-    data += "refInFor:true,";
-  }
-  // pre
-  if (el.pre) {
-    data += "pre:true,";
-  }
-  // record original tag name for components using "is" attribute
-  if (el.component) {
-    data += "tag:\"" + (el.tag) + "\",";
-  }
-  // module data generation functions
-  for (var i = 0; i < state.dataGenFns.length; i++) {
-    data += state.dataGenFns[i](el);
-  }
-  // attributes
-  if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
-  }
-  // DOM props
-  if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
-  }
-  // event handlers
-  if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
-  }
-  if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
-  }
-  // slot target
-  // only for non-scoped slots
-  if (el.slotTarget && !el.slotScope) {
-    data += "slot:" + (el.slotTarget) + ",";
-  }
-  // scoped slots
-  if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
-  }
-  // component v-model
-  if (el.model) {
-    data += "model:{value:" + (el.model.value) + ",callback:" + (el.model.callback) + ",expression:" + (el.model.expression) + "},";
-  }
-  // inline-template
-  if (el.inlineTemplate) {
-    var inlineTemplate = genInlineTemplate(el, state);
-    if (inlineTemplate) {
-      data += inlineTemplate + ",";
-    }
-  }
-  data = data.replace(/,$/, '') + '}';
-  // v-bind data wrap
-  if (el.wrapData) {
-    data = el.wrapData(data);
-  }
-  // v-on data wrap
-  if (el.wrapListeners) {
-    data = el.wrapListeners(data);
-  }
-  return data
-}
-
-function genDirectives (el, state) {
-  var dirs = el.directives;
-  if (!dirs) { return }
-  var res = 'directives:[';
-  var hasRuntime = false;
-  var i, l, dir, needRuntime;
-  for (i = 0, l = dirs.length; i < l; i++) {
-    dir = dirs[i];
-    needRuntime = true;
-    var gen = state.directives[dir.name];
-    if (gen) {
-      // compile-time directive that manipulates AST.
-      // returns true if it also needs a runtime counterpart.
-      needRuntime = !!gen(el, dir, state.warn);
-    }
-    if (needRuntime) {
-      hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
-    }
-  }
-  if (hasRuntime) {
-    return res.slice(0, -1) + ']'
-  }
-}
-
-function genInlineTemplate (el, state) {
-  var ast = el.children[0];
-  if ("development" !== 'production' && (
-    el.children.length !== 1 || ast.type !== 1
-  )) {
-    state.warn('Inline-template components must have exactly one child element.');
-  }
-  if (ast.type === 1) {
-    var inlineRenderFns = generate(ast, state.options);
-    return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
-  }
-}
-
-function genScopedSlots (
-  slots,
-  state
-) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
-}
-
-function genScopedSlot (
-  key,
-  el,
-  state
-) {
-  if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
-  }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
-    "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
-        : genChildren(el, state) || 'undefined'
-      : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
-}
-
-function genChildren (
-  el,
-  state,
-  checkSkip,
-  altGenElement,
-  altGenNode
-) {
-  var children = el.children;
-  if (children.length) {
-    var el$1 = children[0];
-    // optimize single v-for
-    if (children.length === 1 &&
-      el$1.for &&
-      el$1.tag !== 'template' &&
-      el$1.tag !== 'slot'
-    ) {
-      return (altGenElement || genElement)(el$1, state)
-    }
-    var normalizationType = checkSkip
-      ? getNormalizationType(children, state.maybeComponent)
-      : 0;
-    var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
-  }
-}
-
-// determine the normalization needed for the children array.
-// 0: no normalization needed
-// 1: simple normalization needed (possible 1-level deep nested array)
-// 2: full normalization needed
-function getNormalizationType (
-  children,
-  maybeComponent
-) {
-  var res = 0;
-  for (var i = 0; i < children.length; i++) {
-    var el = children[i];
-    if (el.type !== 1) {
-      continue
-    }
-    if (needsNormalization(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return needsNormalization(c.block); }))) {
-      res = 2;
-      break
-    }
-    if (maybeComponent(el) ||
-        (el.ifConditions && el.ifConditions.some(function (c) { return maybeComponent(c.block); }))) {
-      res = 1;
-    }
-  }
-  return res
-}
-
-function needsNormalization (el) {
-  return el.for !== undefined || el.tag === 'template' || el.tag === 'slot'
-}
-
-function genNode (node, state) {
-  if (node.type === 1) {
-    return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
-    return genComment(node)
-  } else {
-    return genText(node)
-  }
-}
-
-function genText (text) {
-  return ("_v(" + (text.type === 2
-    ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
-}
-
-function genComment (comment) {
-  return ("_e(" + (JSON.stringify(comment.text)) + ")")
-}
-
-function genSlot (el, state) {
-  var slotName = el.slotName || '"default"';
-  var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
-  var bind$$1 = el.attrsMap['v-bind'];
-  if ((attrs || bind$$1) && !children) {
-    res += ",null";
-  }
-  if (attrs) {
-    res += "," + attrs;
-  }
-  if (bind$$1) {
-    res += (attrs ? '' : ',null') + "," + bind$$1;
-  }
-  return res + ')'
-}
-
-// componentName is el.component, take it as argument to shun flow's pessimistic refinement
-function genComponent (
-  componentName,
-  el,
-  state
-) {
-  var children = el.inlineTemplate ? null : genChildren(el, state, true);
-  return ("_c(" + componentName + "," + (genData$2(el, state)) + (children ? ("," + children) : '') + ")")
-}
-
-function genProps (props) {
-  var res = '';
-  for (var i = 0; i < props.length; i++) {
-    var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+  function genClassSegments (
+    staticClass,
+    classBinding
+  ) {
+    if (staticClass && !classBinding) {
+      return [{ type: RAW, value: (" class=\"" + (JSON.parse(staticClass)) + "\"") }]
+    } else {
+      return [{
+        type: EXPRESSION,
+        value: ("_ssrClass(" + (staticClass || 'null') + "," + (classBinding || 'null') + ")")
+      }]
     }
   }
-  return res.slice(0, -1)
-}
-
-// #3895, #4268
-function transformSpecialNewlines (text) {
-  return text
-    .replace(/\u2028/g, '\\u2028')
-    .replace(/\u2029/g, '\\u2029')
-}
 
-/*  */
+  function genStyleSegments (
+    staticStyle,
+    parsedStaticStyle,
+    styleBinding,
+    vShowExpression
+  ) {
+    if (staticStyle && !styleBinding && !vShowExpression) {
+      return [{ type: RAW, value: (" style=" + (JSON.stringify(staticStyle))) }]
+    } else {
+      return [{
+        type: EXPRESSION,
+        value: ("_ssrStyle(" + (parsedStaticStyle || 'null') + "," + (styleBinding || 'null') + ", " + (vShowExpression
+            ? ("{ display: (" + vShowExpression + ") ? '' : 'none' }")
+            : 'null') + ")")
+      }]
+    }
+  }
 
-// these keywords should not appear inside expressions, but operators like
-// typeof, instanceof and in are allowed
-var prohibitedKeywordRE = new RegExp('\\b' + (
-  'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
-  'super,throw,while,yield,delete,export,import,return,switch,default,' +
-  'extends,finally,continue,debugger,function,arguments'
-).split(',').join('\\b|\\b') + '\\b');
+  /*  */
 
-// these unary operators should not be used as property/method names
-var unaryOperatorsRE = new RegExp('\\b' + (
-  'delete,typeof,void'
-).split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)');
+  // optimizability constants
+  var optimizability = {
+    FALSE: 0,    // whole sub tree un-optimizable
+    FULL: 1,     // whole sub tree optimizable
+    SELF: 2,     // self optimizable but has some un-optimizable children
+    CHILDREN: 3, // self un-optimizable but have fully optimizable children
+    PARTIAL: 4   // self un-optimizable with some un-optimizable children
+  };
 
-// strip strings in expressions
-var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
+  var isPlatformReservedTag$1;
 
-// detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
-  if (ast) {
-    checkNode(ast, errors);
+  function optimize$1 (root, options) {
+    if (!root) { return }
+    isPlatformReservedTag$1 = options.isReservedTag || no;
+    walk(root, true);
   }
-  return errors
-}
 
-function checkNode (node, errors) {
-  if (node.type === 1) {
-    for (var name in node.attrsMap) {
-      if (dirRE.test(name)) {
-        var value = node.attrsMap[name];
-        if (value) {
-          if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
-          } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
-          } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
-          }
-        }
+  function walk (node, isRoot) {
+    if (isUnOptimizableTree(node)) {
+      node.ssrOptimizability = optimizability.FALSE;
+      return
+    }
+    // root node or nodes with custom directives should always be a VNode
+    var selfUnoptimizable = isRoot || hasCustomDirective(node);
+    var check = function (child) {
+      if (child.ssrOptimizability !== optimizability.FULL) {
+        node.ssrOptimizability = selfUnoptimizable
+          ? optimizability.PARTIAL
+          : optimizability.SELF;
       }
+    };
+    if (selfUnoptimizable) {
+      node.ssrOptimizability = optimizability.CHILDREN;
     }
-    if (node.children) {
-      for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+    if (node.type === 1) {
+      for (var i = 0, l = node.children.length; i < l; i++) {
+        var child = node.children[i];
+        walk(child);
+        check(child);
+      }
+      if (node.ifConditions) {
+        for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
+          var block = node.ifConditions[i$1].block;
+          walk(block, isRoot);
+          check(block);
+        }
       }
+      if (node.ssrOptimizability == null ||
+        (!isRoot && (node.attrsMap['v-html'] || node.attrsMap['v-text']))
+      ) {
+        node.ssrOptimizability = optimizability.FULL;
+      } else {
+        node.children = optimizeSiblings(node);
+      }
+    } else {
+      node.ssrOptimizability = optimizability.FULL;
     }
-  } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
   }
-}
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
-      "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
-    );
-  }
-  checkExpression(exp, text, errors);
-}
-
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
-}
-
-function checkIdentifier (
-  ident,
-  type,
-  text,
-  errors
-) {
-  if (typeof ident === 'string') {
-    try {
-      new Function(("var " + ident + "=_"));
-    } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+  function optimizeSiblings (el) {
+    var children = el.children;
+    var optimizedChildren = [];
+
+    var currentOptimizableGroup = [];
+    var pushGroup = function () {
+      if (currentOptimizableGroup.length) {
+        optimizedChildren.push({
+          type: 1,
+          parent: el,
+          tag: 'template',
+          attrsList: [],
+          attrsMap: {},
+          rawAttrsMap: {},
+          children: currentOptimizableGroup,
+          ssrOptimizability: optimizability.FULL
+        });
+      }
+      currentOptimizableGroup = [];
+    };
+
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (c.ssrOptimizability === optimizability.FULL) {
+        currentOptimizableGroup.push(c);
+      } else {
+        // wrap fully-optimizable adjacent siblings inside a template tag
+        // so that they can be optimized into a single ssrNode by codegen
+        pushGroup();
+        optimizedChildren.push(c);
+      }
     }
+    pushGroup();
+    return optimizedChildren
   }
-}
 
-function checkExpression (exp, text, errors) {
-  try {
-    new Function(("return " + exp));
-  } catch (e) {
-    var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
-    if (keywordMatch) {
-      errors.push(
-        "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
-      );
-    } else {
-      errors.push(
-        "invalid expression: " + (e.message) + " in\n\n" +
-        "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
-      );
+  function isUnOptimizableTree (node) {
+    if (node.type === 2 || node.type === 3) { // text or expression
+      return false
     }
+    return (
+      isBuiltInTag(node.tag) || // built-in (slot, component)
+      !isPlatformReservedTag$1(node.tag) || // custom component
+      !!node.component || // "is" component
+      isSelectWithModel(node) // <select v-model> requires runtime inspection
+    )
   }
-}
 
-/*  */
+  var isBuiltInDir = makeMap('text,html,show,on,bind,model,pre,cloak,once');
 
-function createFunction (code, errors) {
-  try {
-    return new Function(code)
-  } catch (err) {
-    errors.push({ err: err, code: code });
-    return noop
+  function hasCustomDirective (node) {
+    return (
+      node.type === 1 &&
+      node.directives &&
+      node.directives.some(function (d) { return !isBuiltInDir(d.name); })
+    )
   }
-}
 
-function createCompileToFunctionFn (compile) {
-  var cache = Object.create(null);
+  // <select v-model> cannot be optimized because it requires a runtime check
+  // to determine proper selected option
+  function isSelectWithModel (node) {
+    return (
+      node.type === 1 &&
+      node.tag === 'select' &&
+      node.directives != null &&
+      node.directives.some(function (d) { return d.name === 'model'; })
+    )
+  }
 
-  return function compileToFunctions (
-    template,
-    options,
-    vm
-  ) {
-    options = extend({}, options);
-    var warn$$1 = options.warn || warn;
-    delete options.warn;
+  /*  */
 
-    /* istanbul ignore if */
-    {
-      // detect possible CSP restriction
-      try {
-        new Function('return 1');
-      } catch (e) {
-        if (e.toString().match(/unsafe-eval|CSP/)) {
-          warn$$1(
-            'It seems you are using the standalone build of Vue.js in an ' +
-            'environment with Content Security Policy that prohibits unsafe-eval. ' +
-            'The template compiler cannot work in this environment. Consider ' +
-            'relaxing the policy to allow unsafe-eval or pre-compiling your ' +
-            'templates into render functions.'
-          );
-        }
-      }
-    }
 
-    // check cache
-    var key = options.delimiters
-      ? String(options.delimiters) + template
-      : template;
-    if (cache[key]) {
-      return cache[key]
-    }
 
-    // compile
-    var compiled = compile(template, options);
 
-    // check compilation errors/tips
-    {
-      if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
-      }
-      if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
-      }
-    }
+  // segment types
+  var RAW = 0;
+  var INTERPOLATION = 1;
+  var EXPRESSION = 2;
 
-    // turn code into functions
-    var res = {};
-    var fnGenErrors = [];
-    res.render = createFunction(compiled.render, fnGenErrors);
-    res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
-      return createFunction(code, fnGenErrors)
-    });
+  function generate$1 (
+    ast,
+    options
+  ) {
+    var state = new CodegenState(options);
+    var code = ast ? genSSRElement(ast, state) : '_c("div")';
+    return {
+      render: ("with(this){return " + code + "}"),
+      staticRenderFns: state.staticRenderFns
+    }
+  }
 
-    // check function generation errors.
-    // this should only happen if there is a bug in the compiler itself.
-    // mostly for codegen development use
-    /* istanbul ignore if */
-    {
-      if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
-        warn$$1(
-          "Failed to generate render function:\n\n" +
-          fnGenErrors.map(function (ref) {
-            var err = ref.err;
-            var code = ref.code;
-
-            return ((err.toString()) + " in\n\n" + code + "\n");
-        }).join('\n'),
-          vm
-        );
-      }
+  function genSSRElement (el, state) {
+    if (el.for && !el.forProcessed) {
+      return genFor(el, state, genSSRElement)
+    } else if (el.if && !el.ifProcessed) {
+      return genIf(el, state, genSSRElement)
+    } else if (el.tag === 'template' && !el.slotTarget) {
+      return el.ssrOptimizability === optimizability.FULL
+        ? genChildrenAsStringNode(el, state)
+        : genSSRChildren(el, state) || 'void 0'
     }
 
-    return (cache[key] = res)
+    switch (el.ssrOptimizability) {
+      case optimizability.FULL:
+        // stringify whole tree
+        return genStringElement(el, state)
+      case optimizability.SELF:
+        // stringify self and check children
+        return genStringElementWithChildren(el, state)
+      case optimizability.CHILDREN:
+        // generate self as VNode and stringify children
+        return genNormalElement(el, state, true)
+      case optimizability.PARTIAL:
+        // generate self as VNode and check children
+        return genNormalElement(el, state, false)
+      default:
+        // bail whole tree
+        return genElement(el, state)
+    }
   }
-}
 
-/*  */
-
-function createCompilerCreator (baseCompile) {
-  return function createCompiler (baseOptions) {
-    function compile (
-      template,
-      options
-    ) {
-      var finalOptions = Object.create(baseOptions);
-      var errors = [];
-      var tips = [];
-      finalOptions.warn = function (msg, tip) {
-        (tip ? tips : errors).push(msg);
-      };
+  function genNormalElement (el, state, stringifyChildren) {
+    var data = el.plain ? undefined : genData$2(el, state);
+    var children = stringifyChildren
+      ? ("[" + (genChildrenAsStringNode(el, state)) + "]")
+      : genSSRChildren(el, state, true);
+    return ("_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")")
+  }
 
-      if (options) {
-        // merge custom modules
-        if (options.modules) {
-          finalOptions.modules =
-            (baseOptions.modules || []).concat(options.modules);
-        }
-        // merge custom directives
-        if (options.directives) {
-          finalOptions.directives = extend(
-            Object.create(baseOptions.directives || null),
-            options.directives
-          );
-        }
-        // copy other options
-        for (var key in options) {
-          if (key !== 'modules' && key !== 'directives') {
-            finalOptions[key] = options[key];
-          }
-        }
-      }
+  function genSSRChildren (el, state, checkSkip) {
+    return genChildren(el, state, checkSkip, genSSRElement, genSSRNode)
+  }
 
-      var compiled = baseCompile(template, finalOptions);
-      {
-        errors.push.apply(errors, detectErrors(compiled.ast));
-      }
-      compiled.errors = errors;
-      compiled.tips = tips;
-      return compiled
-    }
+  function genSSRNode (el, state) {
+    return el.type === 1
+      ? genSSRElement(el, state)
+      : genText(el)
+  }
 
-    return {
-      compile: compile,
-      compileToFunctions: createCompileToFunctionFn(compile)
-    }
-  }
-}
-
-/*  */
-
-// `createCompilerCreator` allows creating compilers that use alternative
-// parser/optimizer/codegen, e.g the SSR optimizing compiler.
-// Here we just export a default compiler using the default parts.
-var createCompiler = createCompilerCreator(function baseCompile (
-  template,
-  options
-) {
-  var ast = parse(template.trim(), options);
-  if (options.optimize !== false) {
-    optimize(ast, options);
-  }
-  var code = generate(ast, options);
-  return {
-    ast: ast,
-    render: code.render,
-    staticRenderFns: code.staticRenderFns
-  }
-});
-
-/*  */
-
-var ref = createCompiler(baseOptions);
-var compile = ref.compile;
-var compileToFunctions = ref.compileToFunctions;
-
-/*  */
-
-var isAttr = makeMap(
-  'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
-  'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
-  'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
-  'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
-  'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
-  'muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster,' +
-  'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
-  'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
-  'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
-);
-
-/* istanbul ignore next */
-var isRenderableAttr = function (name) {
-  return (
-    isAttr(name) ||
-    name.indexOf('data-') === 0 ||
-    name.indexOf('aria-') === 0
-  )
-};
-var propsToAttrMap = {
-  acceptCharset: 'accept-charset',
-  className: 'class',
-  htmlFor: 'for',
-  httpEquiv: 'http-equiv'
-};
-
-var ESC = {
-  '<': '&lt;',
-  '>': '&gt;',
-  '"': '&quot;',
-  '&': '&amp;'
-};
-
-function escape (s) {
-  return s.replace(/[<>"&]/g, escapeChar)
-}
-
-function escapeChar (a) {
-  return ESC[a] || a
-}
-
-/*  */
-
-var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
-
-// let the model AST transform translate v-model into appropriate
-// props bindings
-function applyModelTransform (el, state) {
-  if (el.directives) {
-    for (var i = 0; i < el.directives.length; i++) {
-      var dir = el.directives[i];
-      if (dir.name === 'model') {
-        state.directives.model(el, dir, state.warn);
-        // remove value for textarea as its converted to text
-        if (el.tag === 'textarea' && el.props) {
-          el.props = el.props.filter(function (p) { return p.name !== 'value'; });
-        }
-        break
-      }
-    }
+  function genChildrenAsStringNode (el, state) {
+    return el.children.length
+      ? ("_ssrNode(" + (flattenSegments(childrenToSegments(el, state))) + ")")
+      : ''
   }
-}
 
-function genAttrSegments (
-  attrs
-) {
-  return attrs.map(function (ref) {
-    var name = ref.name;
-    var value = ref.value;
+  function genStringElement (el, state) {
+    return ("_ssrNode(" + (elementToString(el, state)) + ")")
+  }
 
-    return genAttrSegment(name, value);
-  })
-}
+  function genStringElementWithChildren (el, state) {
+    var children = genSSRChildren(el, state, true);
+    return ("_ssrNode(" + (flattenSegments(elementToOpenTagSegments(el, state))) + ",\"</" + (el.tag) + ">\"" + (children ? ("," + children) : '') + ")")
+  }
 
-function genDOMPropSegments (
-  props,
-  attrs
-) {
-  var segments = [];
-  props.forEach(function (ref) {
-    var name = ref.name;
-    var value = ref.value;
+  function elementToString (el, state) {
+    return ("(" + (flattenSegments(elementToSegments(el, state))) + ")")
+  }
 
-    name = propsToAttrMap[name] || name.toLowerCase();
-    if (isRenderableAttr(name) &&
-      !(attrs && attrs.some(function (a) { return a.name === name; }))
-    ) {
-      segments.push(genAttrSegment(name, value));
+  function elementToSegments (el, state) {
+    // v-for / v-if
+    if (el.for && !el.forProcessed) {
+      el.forProcessed = true;
+      return [{
+        type: EXPRESSION,
+        value: genFor(el, state, elementToString, '_ssrList')
+      }]
+    } else if (el.if && !el.ifProcessed) {
+      el.ifProcessed = true;
+      return [{
+        type: EXPRESSION,
+        value: genIf(el, state, elementToString, '"<!---->"')
+      }]
+    } else if (el.tag === 'template') {
+      return childrenToSegments(el, state)
     }
-  });
-  return segments
-}
 
-function genAttrSegment (name, value) {
-  if (plainStringRE.test(value)) {
-    // force double quote
-    value = value.replace(/^'|'$/g, '"');
-    // force enumerated attr to "true"
-    if (isEnumeratedAttr(name) && value !== "\"false\"") {
-      value = "\"true\"";
-    }
-    return {
-      type: RAW,
-      value: isBooleanAttr(name)
-        ? (" " + name + "=\"" + name + "\"")
-        : value === '""'
-          ? (" " + name)
-          : (" " + name + "=\"" + (JSON.parse(value)) + "\"")
+    var openSegments = elementToOpenTagSegments(el, state);
+    var childrenSegments = childrenToSegments(el, state);
+    var ref = state.options;
+    var isUnaryTag = ref.isUnaryTag;
+    var close = (isUnaryTag && isUnaryTag(el.tag))
+      ? []
+      : [{ type: RAW, value: ("</" + (el.tag) + ">") }];
+    return openSegments.concat(childrenSegments, close)
+  }
+
+  function elementToOpenTagSegments (el, state) {
+    applyModelTransform(el, state);
+    var binding;
+    var segments = [{ type: RAW, value: ("<" + (el.tag)) }];
+    // attrs
+    if (el.attrs) {
+      segments.push.apply(segments, genAttrSegments(el.attrs));
     }
-  } else {
-    return {
-      type: EXPRESSION,
-      value: ("_ssrAttr(" + (JSON.stringify(name)) + "," + value + ")")
-    }
-  }
-}
-
-function genClassSegments (
-  staticClass,
-  classBinding
-) {
-  if (staticClass && !classBinding) {
-    return [{ type: RAW, value: (" class=" + staticClass) }]
-  } else {
-    return [{
-      type: EXPRESSION,
-      value: ("_ssrClass(" + (staticClass || 'null') + "," + (classBinding || 'null') + ")")
-    }]
-  }
-}
-
-function genStyleSegments (
-  staticStyle,
-  parsedStaticStyle,
-  styleBinding,
-  vShowExpression
-) {
-  if (staticStyle && !styleBinding && !vShowExpression) {
-    return [{ type: RAW, value: (" style=" + (JSON.stringify(staticStyle))) }]
-  } else {
-    return [{
-      type: EXPRESSION,
-      value: ("_ssrStyle(" + (parsedStaticStyle || 'null') + "," + (styleBinding || 'null') + ", " + (vShowExpression
-          ? ("{ display: (" + vShowExpression + ") ? '' : 'none' }")
-          : 'null') + ")")
-    }]
-  }
-}
-
-/*  */
-
-/**
- * In SSR, the vdom tree is generated only once and never patched, so
- * we can optimize most element / trees into plain string render functions.
- * The SSR optimizer walks the AST tree to detect optimizable elements and trees.
- *
- * The criteria for SSR optimizability is quite a bit looser than static tree
- * detection (which is designed for client re-render). In SSR we bail only for
- * components/slots/custom directives.
- */
-
-// optimizability constants
-var optimizability = {
-  FALSE: 0,    // whole sub tree un-optimizable
-  FULL: 1,     // whole sub tree optimizable
-  SELF: 2,     // self optimizable but has some un-optimizable children
-  CHILDREN: 3, // self un-optimizable but have fully optimizable children
-  PARTIAL: 4   // self un-optimizable with some un-optimizable children
-};
-
-var isPlatformReservedTag$1;
-
-function optimize$1 (root, options) {
-  if (!root) { return }
-  isPlatformReservedTag$1 = options.isReservedTag || no;
-  walk(root, true);
-}
-
-function walk (node, isRoot) {
-  if (isUnOptimizableTree(node)) {
-    node.ssrOptimizability = optimizability.FALSE;
-    return
-  }
-  // root node or nodes with custom directives should always be a VNode
-  var selfUnoptimizable = isRoot || hasCustomDirective(node);
-  var check = function (child) {
-    if (child.ssrOptimizability !== optimizability.FULL) {
-      node.ssrOptimizability = selfUnoptimizable
-        ? optimizability.PARTIAL
-        : optimizability.SELF;
+    // domProps
+    if (el.props) {
+      segments.push.apply(segments, genDOMPropSegments(el.props, el.attrs));
     }
-  };
-  if (selfUnoptimizable) {
-    node.ssrOptimizability = optimizability.CHILDREN;
-  }
-  if (node.type === 1) {
-    for (var i = 0, l = node.children.length; i < l; i++) {
-      var child = node.children[i];
-      walk(child);
-      check(child);
+    // v-bind="object"
+    if ((binding = el.attrsMap['v-bind'])) {
+      segments.push({ type: EXPRESSION, value: ("_ssrAttrs(" + binding + ")") });
     }
-    if (node.ifConditions) {
-      for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
-        var block = node.ifConditions[i$1].block;
-        walk(block, isRoot);
-        check(block);
-      }
+    // v-bind.prop="object"
+    if ((binding = el.attrsMap['v-bind.prop'])) {
+      segments.push({ type: EXPRESSION, value: ("_ssrDOMProps(" + binding + ")") });
     }
-    if (node.ssrOptimizability == null ||
-      (!isRoot && (node.attrsMap['v-html'] || node.attrsMap['v-text']))
-    ) {
-      node.ssrOptimizability = optimizability.FULL;
-    } else {
-      node.children = optimizeSiblings(node);
+    // class
+    if (el.staticClass || el.classBinding) {
+      segments.push.apply(
+        segments,
+        genClassSegments(el.staticClass, el.classBinding)
+      );
     }
-  } else {
-    node.ssrOptimizability = optimizability.FULL;
-  }
-}
-
-function optimizeSiblings (el) {
-  var children = el.children;
-  var optimizedChildren = [];
-
-  var currentOptimizableGroup = [];
-  var pushGroup = function () {
-    if (currentOptimizableGroup.length) {
-      optimizedChildren.push({
-        type: 1,
-        parent: el,
-        tag: 'template',
-        attrsList: [],
-        attrsMap: {},
-        children: currentOptimizableGroup,
-        ssrOptimizability: optimizability.FULL
-      });
+    // style & v-show
+    if (el.staticStyle || el.styleBinding || el.attrsMap['v-show']) {
+      segments.push.apply(
+        segments,
+        genStyleSegments(
+          el.attrsMap.style,
+          el.staticStyle,
+          el.styleBinding,
+          el.attrsMap['v-show']
+        )
+      );
     }
-    currentOptimizableGroup = [];
-  };
-
-  for (var i = 0; i < children.length; i++) {
-    var c = children[i];
-    if (c.ssrOptimizability === optimizability.FULL) {
-      currentOptimizableGroup.push(c);
-    } else {
-      // wrap fully-optimizable adjacent siblings inside a template tag
-      // so that they can be optimized into a single ssrNode by codegen
-      pushGroup();
-      optimizedChildren.push(c);
+    // _scopedId
+    if (state.options.scopeId) {
+      segments.push({ type: RAW, value: (" " + (state.options.scopeId)) });
     }
+    segments.push({ type: RAW, value: ">" });
+    return segments
   }
-  pushGroup();
-  return optimizedChildren
-}
 
-function isUnOptimizableTree (node) {
-  if (node.type === 2 || node.type === 3) { // text or expression
-    return false
-  }
-  return (
-    isBuiltInTag(node.tag) || // built-in (slot, component)
-    !isPlatformReservedTag$1(node.tag) || // custom component
-    !!node.component || // "is" component
-    isSelectWithModel(node) // <select v-model> requires runtime inspection
-  )
-}
-
-var isBuiltInDir = makeMap('text,html,show,on,bind,model,pre,cloak,once');
-
-function hasCustomDirective (node) {
-  return (
-    node.type === 1 &&
-    node.directives &&
-    node.directives.some(function (d) { return !isBuiltInDir(d.name); })
-  )
-}
-
-// <select v-model> cannot be optimized because it requires a runtime check
-// to determine proper selected option
-function isSelectWithModel (node) {
-  return (
-    node.type === 1 &&
-    node.tag === 'select' &&
-    node.directives != null &&
-    node.directives.some(function (d) { return d.name === 'model'; })
-  )
-}
-
-/*  */
-
-// The SSR codegen is essentially extending the default codegen to handle
-// SSR-optimizable nodes and turn them into string render fns. In cases where
-// a node is not optimizable it simply falls back to the default codegen.
-
-// segment types
-var RAW = 0;
-var INTERPOLATION = 1;
-var EXPRESSION = 2;
-
-function generate$1 (
-  ast,
-  options
-) {
-  var state = new CodegenState(options);
-  var code = ast ? genSSRElement(ast, state) : '_c("div")';
-  return {
-    render: ("with(this){return " + code + "}"),
-    staticRenderFns: state.staticRenderFns
-  }
-}
-
-function genSSRElement (el, state) {
-  if (el.for && !el.forProcessed) {
-    return genFor(el, state, genSSRElement)
-  } else if (el.if && !el.ifProcessed) {
-    return genIf(el, state, genSSRElement)
-  } else if (el.tag === 'template' && !el.slotTarget) {
-    return el.ssrOptimizability === optimizability.FULL
-      ? genChildrenAsStringNode(el, state)
-      : genSSRChildren(el, state) || 'void 0'
-  }
-
-  switch (el.ssrOptimizability) {
-    case optimizability.FULL:
-      // stringify whole tree
-      return genStringElement(el, state)
-    case optimizability.SELF:
-      // stringify self and check children
-      return genStringElementWithChildren(el, state)
-    case optimizability.CHILDREN:
-      // generate self as VNode and stringify children
-      return genNormalElement(el, state, true)
-    case optimizability.PARTIAL:
-      // generate self as VNode and check children
-      return genNormalElement(el, state, false)
-    default:
-      // bail whole tree
-      return genElement(el, state)
-  }
-}
-
-function genNormalElement (el, state, stringifyChildren) {
-  var data = el.plain ? undefined : genData$2(el, state);
-  var children = stringifyChildren
-    ? ("[" + (genChildrenAsStringNode(el, state)) + "]")
-    : genSSRChildren(el, state, true);
-  return ("_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")")
-}
-
-function genSSRChildren (el, state, checkSkip) {
-  return genChildren(el, state, checkSkip, genSSRElement, genSSRNode)
-}
-
-function genSSRNode (el, state) {
-  return el.type === 1
-    ? genSSRElement(el, state)
-    : genText(el)
-}
-
-function genChildrenAsStringNode (el, state) {
-  return el.children.length
-    ? ("_ssrNode(" + (flattenSegments(childrenToSegments(el, state))) + ")")
-    : ''
-}
-
-function genStringElement (el, state) {
-  return ("_ssrNode(" + (elementToString(el, state)) + ")")
-}
-
-function genStringElementWithChildren (el, state) {
-  var children = genSSRChildren(el, state, true);
-  return ("_ssrNode(" + (flattenSegments(elementToOpenTagSegments(el, state))) + ",\"</" + (el.tag) + ">\"" + (children ? ("," + children) : '') + ")")
-}
-
-function elementToString (el, state) {
-  return ("(" + (flattenSegments(elementToSegments(el, state))) + ")")
-}
-
-function elementToSegments (el, state) {
-  // v-for / v-if
-  if (el.for && !el.forProcessed) {
-    el.forProcessed = true;
-    return [{
-      type: EXPRESSION,
-      value: genFor(el, state, elementToString, '_ssrList')
-    }]
-  } else if (el.if && !el.ifProcessed) {
-    el.ifProcessed = true;
-    return [{
-      type: EXPRESSION,
-      value: genIf(el, state, elementToString, '"<!---->"')
-    }]
-  } else if (el.tag === 'template') {
-    return childrenToSegments(el, state)
-  }
-
-  var openSegments = elementToOpenTagSegments(el, state);
-  var childrenSegments = childrenToSegments(el, state);
-  var ref = state.options;
-  var isUnaryTag = ref.isUnaryTag;
-  var close = (isUnaryTag && isUnaryTag(el.tag))
-    ? []
-    : [{ type: RAW, value: ("</" + (el.tag) + ">") }];
-  return openSegments.concat(childrenSegments, close)
-}
-
-function elementToOpenTagSegments (el, state) {
-  applyModelTransform(el, state);
-  var binding;
-  var segments = [{ type: RAW, value: ("<" + (el.tag)) }];
-  // attrs
-  if (el.attrs) {
-    segments.push.apply(segments, genAttrSegments(el.attrs));
-  }
-  // domProps
-  if (el.props) {
-    segments.push.apply(segments, genDOMPropSegments(el.props, el.attrs));
-  }
-  // v-bind="object"
-  if ((binding = el.attrsMap['v-bind'])) {
-    segments.push({ type: EXPRESSION, value: ("_ssrAttrs(" + binding + ")") });
-  }
-  // v-bind.prop="object"
-  if ((binding = el.attrsMap['v-bind.prop'])) {
-    segments.push({ type: EXPRESSION, value: ("_ssrDOMProps(" + binding + ")") });
-  }
-  // class
-  if (el.staticClass || el.classBinding) {
-    segments.push.apply(
-      segments,
-      genClassSegments(el.staticClass, el.classBinding)
-    );
-  }
-  // style & v-show
-  if (el.staticStyle || el.styleBinding || el.attrsMap['v-show']) {
-    segments.push.apply(
-      segments,
-      genStyleSegments(
-        el.attrsMap.style,
-        el.staticStyle,
-        el.styleBinding,
-        el.attrsMap['v-show']
-      )
-    );
-  }
-  // _scopedId
-  if (state.options.scopeId) {
-    segments.push({ type: RAW, value: (" " + (state.options.scopeId)) });
-  }
-  segments.push({ type: RAW, value: ">" });
-  return segments
-}
-
-function childrenToSegments (el, state) {
-  var binding;
-  if ((binding = el.attrsMap['v-html'])) {
-    return [{ type: EXPRESSION, value: ("_s(" + binding + ")") }]
-  }
-  if ((binding = el.attrsMap['v-text'])) {
-    return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
-  }
-  if (el.tag === 'textarea' && (binding = el.attrsMap['v-model'])) {
-    return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
-  }
-  return el.children
-    ? nodesToSegments(el.children, state)
-    : []
-}
-
-function nodesToSegments (
-  children,
-  state
-) {
-  var segments = [];
-  for (var i = 0; i < children.length; i++) {
-    var c = children[i];
-    if (c.type === 1) {
-      segments.push.apply(segments, elementToSegments(c, state));
-    } else if (c.type === 2) {
-      segments.push({ type: INTERPOLATION, value: c.expression });
-    } else if (c.type === 3) {
-      segments.push({ type: RAW, value: escape(c.text) });
-    }
-  }
-  return segments
-}
-
-function flattenSegments (segments) {
-  var mergedSegments = [];
-  var textBuffer = '';
-
-  var pushBuffer = function () {
-    if (textBuffer) {
-      mergedSegments.push(JSON.stringify(textBuffer));
-      textBuffer = '';
+  function childrenToSegments (el, state) {
+    var binding;
+    if ((binding = el.attrsMap['v-html'])) {
+      return [{ type: EXPRESSION, value: ("_s(" + binding + ")") }]
     }
-  };
+    if ((binding = el.attrsMap['v-text'])) {
+      return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
+    }
+    if (el.tag === 'textarea' && (binding = el.attrsMap['v-model'])) {
+      return [{ type: INTERPOLATION, value: ("_s(" + binding + ")") }]
+    }
+    return el.children
+      ? nodesToSegments(el.children, state)
+      : []
+  }
 
-  for (var i = 0; i < segments.length; i++) {
-    var s = segments[i];
-    if (s.type === RAW) {
-      textBuffer += s.value;
-    } else if (s.type === INTERPOLATION) {
-      pushBuffer();
-      mergedSegments.push(("_ssrEscape(" + (s.value) + ")"));
-    } else if (s.type === EXPRESSION) {
-      pushBuffer();
-      mergedSegments.push(("(" + (s.value) + ")"));
+  function nodesToSegments (
+    children,
+    state
+  ) {
+    var segments = [];
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (c.type === 1) {
+        segments.push.apply(segments, elementToSegments(c, state));
+      } else if (c.type === 2) {
+        segments.push({ type: INTERPOLATION, value: c.expression });
+      } else if (c.type === 3) {
+        var text = escape(c.text);
+        if (c.isComment) {
+          text = '<!--' + text + '-->';
+        }
+        segments.push({ type: RAW, value: text });
+      }
     }
+    return segments
   }
-  pushBuffer();
 
-  return mergedSegments.join('+')
-}
+  function flattenSegments (segments) {
+    var mergedSegments = [];
+    var textBuffer = '';
 
-/*  */
+    var pushBuffer = function () {
+      if (textBuffer) {
+        mergedSegments.push(JSON.stringify(textBuffer));
+        textBuffer = '';
+      }
+    };
+
+    for (var i = 0; i < segments.length; i++) {
+      var s = segments[i];
+      if (s.type === RAW) {
+        textBuffer += s.value;
+      } else if (s.type === INTERPOLATION) {
+        pushBuffer();
+        mergedSegments.push(("_ssrEscape(" + (s.value) + ")"));
+      } else if (s.type === EXPRESSION) {
+        pushBuffer();
+        mergedSegments.push(("(" + (s.value) + ")"));
+      }
+    }
+    pushBuffer();
 
-var createCompiler$1 = createCompilerCreator(function baseCompile (
-  template,
-  options
-) {
-  var ast = parse(template.trim(), options);
-  optimize$1(ast, options);
-  var code = generate$1(ast, options);
-  return {
-    ast: ast,
-    render: code.render,
-    staticRenderFns: code.staticRenderFns
+    return mergedSegments.join('+')
   }
-});
 
-/*  */
+  /*  */
+
+  var createCompiler$1 = createCompilerCreator(function baseCompile (
+    template,
+    options
+  ) {
+    var ast = parse(template.trim(), options);
+    optimize$1(ast, options);
+    var code = generate$1(ast, options);
+    return {
+      ast: ast,
+      render: code.render,
+      staticRenderFns: code.staticRenderFns
+    }
+  });
+
+  /*  */
 
-var ref$1 = createCompiler$1(baseOptions);
-var compile$1 = ref$1.compile;
-var compileToFunctions$1 = ref$1.compileToFunctions;
+  var ref$1 = createCompiler$1(baseOptions);
+  var compile$1 = ref$1.compile;
+  var compileToFunctions$1 = ref$1.compileToFunctions;
 
-/*  */
+  /*  */
 
-exports.parseComponent = parseComponent;
-exports.compile = compile;
-exports.compileToFunctions = compileToFunctions;
-exports.ssrCompile = compile$1;
-exports.ssrCompileToFunctions = compileToFunctions$1;
+  exports.parseComponent = parseComponent;
+  exports.compile = compile;
+  exports.compileToFunctions = compileToFunctions;
+  exports.ssrCompile = compile$1;
+  exports.ssrCompileToFunctions = compileToFunctions$1;
+  exports.generateCodeFrame = generateCodeFrame;
 
-Object.defineProperty(exports, '__esModule', { value: true });
+  Object.defineProperty(exports, '__esModule', { value: true });
 
-})));
+}));
diff --git a/packages/vue-template-compiler/build.js b/packages/vue-template-compiler/build.js
index 29602de7eb7..bd3d3e8bfad 100644
--- a/packages/vue-template-compiler/build.js
+++ b/packages/vue-template-compiler/build.js
@@ -11,20 +11,24 @@ var he = _interopDefault(require('he'));
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-
-
-
-
-
-
-
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
-
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
 
 /**
  * Quick object check - this is primarily used to tell
@@ -36,7 +40,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -52,8 +56,6 @@ function isPlainObject (obj) {
   return _toString.call(obj) === '[object Object]'
 }
 
-
-
 /**
  * Check if val is a valid array index.
  */
@@ -62,17 +64,6 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
-/**
- * Convert a value to a string that is actually rendered.
- */
-
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-
-
 /**
  * Make a map and return a function for checking if a key
  * is in that map.
@@ -97,12 +88,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -114,7 +105,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -141,21 +132,43 @@ var camelize = cached(function (str) {
 });
 
 /**
- * Capitalize a string.
+ * Hyphenate a camelCase string.
  */
-
-
-
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
 
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
+
+  boundFn._length = fn.length;
+  return boundFn
+}
 
-/**
- * Convert an Array-like object to a real Array.
- */
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
 
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
 
 /**
  * Mix properties into target object.
@@ -167,15 +180,12 @@ function extend (to, _from) {
   return to
 }
 
-/**
- * Merge an Array of Objects into a single Object.
- */
-
+/* eslint-disable no-unused-vars */
 
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -184,13 +194,15 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 var identity = function (_) { return _; };
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 function genStaticKeys (modules) {
   return modules.reduce(function (keys, m) {
@@ -198,18 +210,6 @@ function genStaticKeys (modules) {
   }, []).join(',')
 }
 
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-
-
-
-
-/**
- * Ensure a function is called only once.
- */
-
 /*  */
 
 var isUnaryTag = makeMap(
@@ -233,35 +233,44 @@ var isNonPhrasingTag = makeMap(
   'title,tr,track'
 );
 
+/*  */
+
 /**
- * Not type-checking this file because it's mostly vendor code.
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Define a property.
  */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+/**
+ * Not type-checking this file because it's mostly vendor code.
  */
 
 // Regular Expressions for parsing tags and attributes
 var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
 var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
 var startTagOpen = new RegExp(("^<" + qnameCapture));
 var startTagClose = /^\s*(\/?)>/;
 var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
 var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
 var conditionalComment = /^<!\[/;
 
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
 // Special Elements (can contain anything)
 var isPlainTextElement = makeMap('script,style,textarea', true);
 var reCache = {};
@@ -272,10 +281,11 @@ var decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 };
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
 
 // #5992
 var isIgnoreNewlineTag = makeMap('pre,textarea', true);
@@ -305,7 +315,7 @@ function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
             }
             advance(commentEnd + 3);
             continue
@@ -342,7 +352,7 @@ function parseHTML (html, options) {
         var startTagMatch = parseStartTag();
         if (startTagMatch) {
           handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1);
           }
           continue
@@ -365,16 +375,18 @@ function parseHTML (html, options) {
           rest = html.slice(textEnd);
         }
         text = html.substring(0, textEnd);
-        advance(textEnd);
       }
 
       if (textEnd < 0) {
         text = html;
-        html = '';
+      }
+
+      if (text) {
+        advance(text.length);
       }
 
       if (options.chars && text) {
-        options.chars(text);
+        options.chars(text, index - text.length, index);
       }
     } else {
       var endTagLength = 0;
@@ -384,7 +396,7 @@ function parseHTML (html, options) {
         endTagLength = endTag.length;
         if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
           text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
             .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
         }
         if (shouldIgnoreFirstNewline(stackedTag, text)) {
@@ -403,7 +415,7 @@ function parseHTML (html, options) {
     if (html === last) {
       options.chars && options.chars(html);
       if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
       }
       break
     }
@@ -427,8 +439,10 @@ function parseHTML (html, options) {
       };
       advance(start[0].length);
       var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
         advance(attr[0].length);
+        attr.end = index;
         match.attrs.push(attr);
       }
       if (end) {
@@ -459,12 +473,6 @@ function parseHTML (html, options) {
     var attrs = new Array(l);
     for (var i = 0; i < l; i++) {
       var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
       var value = args[3] || args[4] || args[5] || '';
       var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -473,10 +481,14 @@ function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       };
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
       lastTag = tagName;
     }
 
@@ -490,12 +502,9 @@ function parseHTML (html, options) {
     if (start == null) { start = index; }
     if (end == null) { end = index; }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -514,7 +523,8 @@ function parseHTML (html, options) {
           options.warn
         ) {
           options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
           );
         }
         if (options.end) {
@@ -546,8 +556,6 @@ var splitRE = /\r?\n/g;
 var replaceRE = /./g;
 var isSpecialTag = makeMap('script,style,template', true);
 
-
-
 /**
  * Parse a single-file component (*.vue) file into an SFC Descriptor Object.
  */
@@ -561,11 +569,29 @@ function parseComponent (
     template: null,
     script: null,
     styles: [],
-    customBlocks: []
+    customBlocks: [],
+    errors: []
   };
   var depth = 0;
   var currentBlock = null;
 
+  var warn = function (msg) {
+    sfc.errors.push(msg);
+  };
+
+  if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+    warn = function (msg, range) {
+      var data = { msg: msg };
+      if (range.start != null) {
+        data.start = range.start;
+      }
+      if (range.end != null) {
+        data.end = range.end;
+      }
+      sfc.errors.push(data);
+    };
+  }
+
   function start (
     tag,
     attrs,
@@ -620,10 +646,13 @@ function parseComponent (
     }
   }
 
-  function end (tag, start, end) {
+  function end (tag, start) {
     if (depth === 1 && currentBlock) {
       currentBlock.end = start;
-      var text = deindent(content.slice(currentBlock.start, currentBlock.end));
+      var text = content.slice(currentBlock.start, currentBlock.end);
+      if (options.deindent !== false) {
+        text = deindent(text);
+      }
       // pad content so that linters and pre-processors can output correct
       // line numbers in errors and warnings
       if (currentBlock.type !== 'template' && options.pad) {
@@ -648,8 +677,10 @@ function parseComponent (
   }
 
   parseHTML(content, {
+    warn: warn,
     start: start,
-    end: end
+    end: end,
+    outputSourceRange: options.outputSourceRange
   });
 
   return sfc
@@ -657,26 +688,6 @@ function parseComponent (
 
 /*  */
 
-/**
- * Check if a string starts with $ or _
- */
-
-
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
-/*  */
-
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -691,18 +702,16 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
-
-
 if (inBrowser) {
   try {
     var opts = {};
     Object.defineProperty(opts, 'passive', ({
       get: function get () {
-        /* istanbul ignore next */
-        
       }
     })); // https://github.com/facebook/flow/issues/285
     window.addEventListener('test-passive', null, opts);
@@ -715,10 +724,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -738,13 +747,29 @@ var hasSymbol =
   typeof Symbol !== 'undefined' && isNative(Symbol) &&
   typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
 
+var _Set;
 /* istanbul ignore if */ // $flow-disable-line
 if (typeof Set !== 'undefined' && isNative(Set)) {
   // use native Set when available.
-  
+  _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
 }
 
 var ASSET_TYPES = [
@@ -764,11 +789,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -851,6 +879,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -874,9 +908,7 @@ if (process.env.NODE_ENV !== 'production') {
   warn = function (msg, vm) {
     var trace = vm ? generateComponentTrace(vm) : '';
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
+    if (hasConsole && (!config.silent)) {
       console.error(("[Vue warn]: " + msg + trace));
     }
   };
@@ -897,7 +929,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -953,7 +985,6 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
 var uid = 0;
 
 /**
@@ -982,14 +1013,20 @@ Dep.prototype.depend = function depend () {
 Dep.prototype.notify = function notify () {
   // stabilize the subscriber list first
   var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
   for (var i = 0, l = subs.length; i < l; i++) {
     subs[i].update();
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 
 /*  */
@@ -1039,22 +1076,15 @@ prototypeAccessors.child.get = function () {
 
 Object.defineProperties( VNode.prototype, prototypeAccessors );
 
-
-
-
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -1062,7 +1092,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -1093,20 +1128,16 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -1114,10 +1145,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -1125,14 +1157,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -1148,17 +1180,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -1182,7 +1214,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -1199,7 +1231,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -1216,6 +1248,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -1244,6 +1279,8 @@ function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1261,6 +1298,11 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1282,16 +1324,11 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
 
-/**
- * Delete a property and trigger change if necessary.
- */
-
-
 /**
  * Collect dependencies on array elements when the array is touched, since
  * we cannot intercept array element access like property getters.
@@ -1336,14 +1373,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1424,13 +1471,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -1531,8 +1591,6 @@ var defaultStrat = function (parentVal, childVal) {
     : childVal
 };
 
-
-
 function assertObjectType (name, value, vm) {
   if (!isPlainObject(value)) {
     warn(
@@ -1543,26 +1601,14 @@ function assertObjectType (name, value, vm) {
   }
 }
 
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-
 /*  */
 
 /*  */
 
 /*  */
-/* globals MessageChannel */
 
 var callbacks = [];
+
 function flushCallbacks () {
   var copies = callbacks.slice(0);
   callbacks.length = 0;
@@ -1571,39 +1617,28 @@ function flushCallbacks () {
   }
 }
 
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  channel.port1.onmessage = flushCallbacks;
-  
-} else {
-  /* istanbul ignore next */
-  
-}
-
-// Determine MicroTask defer implementation.
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  
-} else {
-  // fallback to macro
-  
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
+if (typeof Promise !== 'undefined' && isNative(Promise)) ; else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
 
 /*  */
 
@@ -1626,12 +1661,14 @@ var mustUseProp = function (tag, type, attr) {
 
 var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
 
+var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');
+
 var isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 );
 
@@ -1639,8 +1676,6 @@ var isBooleanAttr = makeMap(
 
 /*  */
 
-
-
 var isHTMLTag = makeMap(
   'html,body,base,head,link,meta,style,title,' +
   'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
@@ -1659,7 +1694,7 @@ var isHTMLTag = makeMap(
 // contain child elements.
 var isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 );
@@ -1681,16 +1716,10 @@ function getTagNamespace (tag) {
   }
 }
 
-
-
 var isTextInputType = makeMap('text,number,password,search,email,tel,url');
 
 /*  */
 
-/**
- * Query an element selector if it's not an element already.
- */
-
 /*  */
 
 var validDivisionCharRE = /[\w).+\-_$\]]/;
@@ -1785,13 +1814,13 @@ function wrapFilter (exp, filter) {
   } else {
     var name = filter.slice(0, i);
     var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
   }
 }
 
 /*  */
 
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
 var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
 var buildRegex = cached(function (delimiters) {
@@ -1839,9 +1868,13 @@ function parseText (
 
 /*  */
 
-function baseWarn (msg) {
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
   console.error(("[Vue compiler]: " + msg));
 }
+/* eslint-enable no-unused-vars */
 
 function pluckModuleFunction (
   modules,
@@ -1852,20 +1885,23 @@ function pluckModuleFunction (
     : []
 }
 
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
 // add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
+function addRawAttr (el, name, value, range) {
   el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
 }
 
 function addDirective (
@@ -1874,19 +1910,36 @@ function addDirective (
   rawName,
   value,
   arg,
-  modifiers
+  isDynamicArg,
+  modifiers,
+  range
 ) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
   el.plain = false;
 }
 
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
 function addHandler (
   el,
   name,
   value,
   modifiers,
   important,
-  warn
+  warn,
+  range,
+  dynamic
 ) {
   modifiers = modifiers || emptyObject;
   // warn prevent and passive modifier
@@ -1897,35 +1950,42 @@ function addHandler (
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     );
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic);
   }
   if (modifiers.once) {
     delete modifiers.once;
-    name = '~' + name; // mark the event as once
+    name = prependModifierMarker('~', name, dynamic);
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
+    name = prependModifierMarker('&', name, dynamic);
   }
 
   var events;
@@ -1936,7 +1996,7 @@ function addHandler (
     events = el.events || (el.events = {});
   }
 
-  var newHandler = { value: value };
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers;
   }
@@ -1954,6 +2014,15 @@ function addHandler (
   el.plain = false;
 }
 
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
 function getBindingAttr (
   el,
   name,
@@ -1997,6 +2066,35 @@ function getAndRemoveAttr (
   return val
 }
 
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
 /*  */
 
 function transformNode (el, options) {
@@ -2009,7 +2107,8 @@ function transformNode (el, options) {
         "class=\"" + staticClass + "\": " +
         'Interpolation inside attributes has been removed. ' +
         'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
       );
     }
   }
@@ -2054,14 +2153,6 @@ var parseStyleText = cached(function (cssText) {
   return res
 });
 
-// normalize possible array / string values into Object
-
-
-/**
- * parent component style should be after child's
- * so that parent component's style could override it
- */
-
 /*  */
 
 function transformNode$1 (el, options) {
@@ -2076,7 +2167,8 @@ function transformNode$1 (el, options) {
           "style=\"" + staticStyle + "\": " +
           'Interpolation inside attributes has been removed. ' +
           'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
         );
       }
     }
@@ -2125,8 +2217,8 @@ function genComponentModel (
   if (trim) {
     valueExpression =
       "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
   }
   if (number) {
     valueExpression = "_n(" + valueExpression + ")";
@@ -2135,7 +2227,7 @@ function genComponentModel (
 
   el.model = {
     value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
+    expression: JSON.stringify(value),
     callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
   };
 }
@@ -2170,16 +2262,14 @@ function genAssignmentCode (
  *
  */
 
-var len;
-var str;
-var chr;
-var index;
-var expressionPos;
-var expressionEndPos;
+var len, str, chr, index, expressionPos, expressionEndPos;
 
 
 
 function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
   len = val.length;
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
@@ -2259,17 +2349,27 @@ function parseString (chr) {
 /*  */
 
 var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
 var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
 var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
 
 var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE = /[ \f\t\r\n]+/g;
+
+var invalidAttributeRE = /[\s"'<>\/=]/;
 
 var decodeHTMLCached = cached(he.decode);
 
+var emptySlotScopeToken = "_empty_";
+
 // configurable state
 var warn$1;
 var delimiters;
@@ -2279,8 +2379,7 @@ var postTransforms;
 var platformIsPreTag;
 var platformMustUseProp;
 var platformGetTagNamespace;
-
-
+var maybeComponent;
 
 function createASTElement (
   tag,
@@ -2292,6 +2391,7 @@ function createASTElement (
     tag: tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent: parent,
     children: []
   }
@@ -2309,7 +2409,13 @@ function parse (
   platformIsPreTag = options.isPreTag || no;
   platformMustUseProp = options.mustUseProp || no;
   platformGetTagNamespace = options.getTagNamespace || no;
-
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  ); };
   transforms = pluckModuleFunction(options.modules, 'transformNode');
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
@@ -2318,20 +2424,67 @@ function parse (
 
   var stack = [];
   var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
   var root;
   var currentParent;
   var inVPre = false;
   var inPre = false;
   var warned = false;
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true;
-      warn$1(msg);
+      warn$1(msg, range);
     }
   }
 
   function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else if (process.env.NODE_ENV !== 'production') {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
     // check pre state
     if (element.pre) {
       inVPre = false;
@@ -2345,6 +2498,37 @@ function parse (
     }
   }
 
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
   parseHTML(template, {
     warn: warn$1,
     expectHTML: options.expectHTML,
@@ -2353,7 +2537,8 @@ function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
       // check namespace.
       // inherit parent ns if there is one
       var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
@@ -2369,12 +2554,36 @@ function parse (
         element.ns = ns;
       }
 
+      if (process.env.NODE_ENV !== 'production') {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn$1(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true;
         process.env.NODE_ENV !== 'production' && warn$1(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
         );
       }
 
@@ -2399,58 +2608,15 @@ function parse (
         processFor(element);
         processIf(element);
         processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
-      }
-
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
       }
 
-      // tree management
       if (!root) {
         root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(root);
         }
       }
+
       if (!unary) {
         currentParent = element;
         stack.push(element);
@@ -2459,29 +2625,29 @@ function parse (
       }
     },
 
-    end: function end () {
-      // remove trailing whitespace
+    end: function end (tag, start, end$1) {
       var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
       // pop stack
       stack.length -= 1;
       currentParent = stack[stack.length - 1];
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        element.end = end$1;
+      }
       closeElement(element);
     },
 
-    chars: function chars (text) {
+    chars: function chars (text, start, end) {
       if (!currentParent) {
         if (process.env.NODE_ENV !== 'production') {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start: start }
             );
           } else if ((text = text.trim())) {
             warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
             );
           }
         }
@@ -2496,33 +2662,66 @@ function parse (
         return
       }
       var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
       if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE, ' ');
+        }
         var res;
+        var child;
         if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
+          child = {
             type: 2,
             expression: res.expression,
             tokens: res.tokens,
             text: text
-          });
+          };
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text: text
-          });
+          };
+        }
+        if (child) {
+          if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
         }
       }
     },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
     }
   });
   return root
@@ -2535,14 +2734,19 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
       };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
     }
   } else if (!el.pre) {
     // non root node in pre blocks with no attributes
@@ -2550,27 +2754,53 @@ function processRawAttrs (el) {
   }
 }
 
-function processElement (element, options) {
+function processElement (
+  element,
+  options
+) {
   processKey(element);
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
 
   processRef(element);
-  processSlot(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
   processComponent(element);
   for (var i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element;
   }
   processAttrs(element);
+  return element
 }
 
 function processKey (el) {
   var exp = getBindingAttr(el, 'key');
   if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn$1("<template> cannot be keyed. Place the key on real elements instead.");
+    if (process.env.NODE_ENV !== 'production') {
+      if (el.tag === 'template') {
+        warn$1(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn$1(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
     }
     el.key = exp;
   }
@@ -2592,12 +2822,15 @@ function processFor (el) {
       extend(el, res);
     } else if (process.env.NODE_ENV !== 'production') {
       warn$1(
-        ("Invalid v-for expression: " + exp)
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
       );
     }
   }
 }
 
+
+
 function parseFor (exp) {
   var inMatch = exp.match(forAliasRE);
   if (!inMatch) { return }
@@ -2606,7 +2839,7 @@ function parseFor (exp) {
   var alias = inMatch[1].trim().replace(stripParensRE, '');
   var iteratorMatch = alias.match(forIteratorRE);
   if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
+    res.alias = alias.replace(forIteratorRE, '').trim();
     res.iterator1 = iteratorMatch[1].trim();
     if (iteratorMatch[2]) {
       res.iterator2 = iteratorMatch[2].trim();
@@ -2646,7 +2879,8 @@ function processIfConditions (el, parent) {
   } else if (process.env.NODE_ENV !== 'production') {
     warn$1(
       "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     );
   }
 }
@@ -2660,7 +2894,8 @@ function findPrevElement (children) {
       if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
         warn$1(
           "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
+          "will be ignored.",
+          children[i]
         );
       }
       children.pop();
@@ -2682,52 +2917,158 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && slotScope) {
+      warn$1(
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+      warn$1(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
+    if (el.tag === 'template') {
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (el.slotTarget || el.slotScope) {
+            warn$1(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn$1(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+      }
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (!maybeComponent(el)) {
+            warn$1(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn$1(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn$1(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
+      }
+    }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn$1(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
   if (el.tag === 'slot') {
     el.slotName = getBindingAttr(el, 'name');
     if (process.env.NODE_ENV !== 'production' && el.key) {
       warn$1(
         "`key` does not work on <slot> because slots are abstract outlets " +
         "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
       );
     }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn$1(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
-      }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn$1(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
-      }
-      el.slotScope = slotScope;
-    }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
-    }
   }
 }
 
@@ -2743,7 +3084,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name;
     value = list[i].value;
@@ -2751,50 +3092,100 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true;
       // modifiers
-      modifiers = parseModifiers(name);
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
       if (modifiers) {
         name = name.replace(modifierRE, '');
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
-        isProp = false;
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          process.env.NODE_ENV !== 'production' &&
+          value.trim().length === 0
+        ) {
+          warn$1(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name);
             if (name === 'innerHtml') { name = 'innerHTML'; }
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name);
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn$1,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn$1,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn$1,
+                list[i],
+                true // dynamic
+              );
+            }
           }
         }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value);
+          addProp(el, name, value, list[i], isDynamic);
         } else {
-          addAttr(el, name, value);
+          addAttr(el, name, value, list[i], isDynamic);
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn$1);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn$1, list[i], isDynamic);
       } else { // normal directives
         name = name.replace(dirRE, '');
         // parse arg
         var argMatch = name.match(argRE);
         var arg = argMatch && argMatch[1];
+        isDynamic = false;
         if (arg) {
           name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers);
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
         if (process.env.NODE_ENV !== 'production' && name === 'model') {
           checkForAliasModel(el, value);
         }
@@ -2808,17 +3199,18 @@ function processAttrs (el) {
             name + "=\"" + value + "\": " +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
+      addAttr(el, name, JSON.stringify(value), list[i]);
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+        addProp(el, name, 'true', list[i]);
       }
     }
   }
@@ -2851,7 +3243,7 @@ function makeAttrsMap (attrs) {
       process.env.NODE_ENV !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn$1('duplicate attribute: ' + attrs[i].name);
+      warn$1('duplicate attribute: ' + attrs[i].name, attrs[i]);
     }
     map[attrs[i].name] = attrs[i].value;
   }
@@ -2898,7 +3290,8 @@ function checkForAliasModel (el, value) {
         "You are binding v-model directly to a v-for iteration alias. " +
         "This will not be able to modify the v-for source array because " +
         "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
       );
     }
     _el = _el.parent;
@@ -2907,21 +3300,22 @@ function checkForAliasModel (el, value) {
 
 /*  */
 
-/**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
- * Turn this:
- *   <input v-model="data[type]" :type="type">
- * into this:
- *   <input v-if="type === 'checkbox'" type="checkbox" v-model="data[type]">
- *   <input v-else-if="type === 'radio'" type="radio" v-model="data[type]">
- *   <input v-else :type="type" v-model="data[type]">
- */
-
 function preTransformNode (el, options) {
   if (el.tag === 'input') {
     var map = el.attrsMap;
-    if (map['v-model'] && (map['v-bind:type'] || map[':type'])) {
-      var typeBinding = getBindingAttr(el, 'type');
+    if (!map['v-model']) {
+      return
+    }
+
+    var typeBinding;
+    if (map[':type'] || map['v-bind:type']) {
+      typeBinding = getBindingAttr(el, 'type');
+    }
+    if (!map.type && !typeBinding && map['v-bind']) {
+      typeBinding = "(" + (map['v-bind']) + ").type";
+    }
+
+    if (typeBinding) {
       var ifCondition = getAndRemoveAttr(el, 'v-if', true);
       var ifConditionExtra = ifCondition ? ("&&(" + ifCondition + ")") : "";
       var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
@@ -2990,7 +3384,6 @@ var warn$2;
 // so we used some reserved tokens during compile.
 var RANGE_TOKEN = '__r';
 
-
 function model$1 (
   el,
   dir,
@@ -3008,7 +3401,8 @@ function model$1 (
     if (tag === 'input' && type === 'file') {
       warn$2(
         "<" + (el.tag) + " v-model=\"" + value + "\" type=\"file\">:\n" +
-        "File inputs are read only. Use a v-on:change listener instead."
+        "File inputs are read only. Use a v-on:change listener instead.",
+        el.rawAttrsMap['v-model']
       );
     }
   }
@@ -3034,7 +3428,8 @@ function model$1 (
       "<" + (el.tag) + " v-model=\"" + value + "\">: " +
       "v-model is not supported on this element type. " +
       'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
     );
   }
 
@@ -3066,8 +3461,8 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," +
           '$$i=_i($$a,$$v);' +
-      "if($$el.checked){$$i<0&&(" + value + "=$$a.concat([$$v]))}" +
-      "else{$$i>-1&&(" + value + "=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}" +
+      "if($$el.checked){$$i<0&&(" + (genAssignmentCode(value, '$$a.concat([$$v])')) + ")}" +
+      "else{$$i>-1&&(" + (genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')) + ")}" +
     "}else{" + (genAssignmentCode(value, '$$c')) + "}",
     null, true
   );
@@ -3110,13 +3505,16 @@ function genDefaultModel (
   var type = el.attrsMap.type;
 
   // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
   if (process.env.NODE_ENV !== 'production') {
     var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
-    if (value$1) {
+    var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];
+    if (value$1 && !typeBinding) {
       var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
       warn$2(
         binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " +
-        'because the latter already expands to a value binding internally'
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
       );
     }
   }
@@ -3156,7 +3554,7 @@ function genDefaultModel (
 
 function text (el, dir) {
   if (dir.value) {
-    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'textContent', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -3164,7 +3562,7 @@ function text (el, dir) {
 
 function html (el, dir) {
   if (dir.value) {
-    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"));
+    addProp(el, 'innerHTML', ("_s(" + (dir.value) + ")"), dir);
   }
 }
 
@@ -3219,7 +3617,7 @@ function optimize (root, options) {
 
 function genStaticKeys$1 (keys) {
   return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
     (keys ? ',' + keys : '')
   )
 }
@@ -3318,10 +3716,11 @@ function isDirectChildOfTemplateFor (node) {
 
 /*  */
 
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 var keyCodes = {
   esc: 27,
   tab: 9,
@@ -3334,6 +3733,23 @@ var keyCodes = {
   'delete': [8, 46]
 };
 
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -3354,37 +3770,45 @@ var modifierCode = {
 
 function genHandlers (
   events,
-  isNative,
-  warn
+  isNative
 ) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
   for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
-function genHandler (
-  name,
-  handler
-) {
+function genHandler (handler) {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
   }
 
   var isMethodPath = simplePathRE.test(handler.value);
   var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
 
   if (!handler.modifiers) {
     if (isMethodPath || isFunctionExpression) {
       return handler.value
     }
-    /* istanbul ignore if */
-    return ("function($event){" + (handler.value) + "}") // inline statement
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
   } else {
     var code = '';
     var genModifierCode = '';
@@ -3416,17 +3840,24 @@ function genHandler (
       code += genModifierCode;
     }
     var handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? ("return " + (handler.value) + ".apply(null, arguments)")
       : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
-    /* istanbul ignore if */
+        ? ("return (" + (handler.value) + ").apply(null, arguments)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
     return ("function($event){" + code + handlerCode + "}")
   }
 }
 
 function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
 }
 
 function genFilterCode (key) {
@@ -3434,12 +3865,15 @@ function genFilterCode (key) {
   if (keyVal) {
     return ("$event.keyCode!==" + keyVal)
   }
-  var code = keyCodes[key];
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
   return (
     "_k($event.keyCode," +
     (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
   )
 }
 
@@ -3470,6 +3904,10 @@ var baseDirectives = {
 
 /*  */
 
+
+
+
+
 var CodegenState = function CodegenState (options) {
   this.options = options;
   this.warn = options.warn || baseWarn;
@@ -3477,9 +3915,10 @@ var CodegenState = function CodegenState (options) {
   this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
   this.directives = extend(extend({}, baseDirectives), options.directives);
   var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
   this.onceId = 0;
   this.staticRenderFns = [];
+  this.pre = false;
 };
 
 
@@ -3489,7 +3928,8 @@ function generate (
   options
 ) {
   var state = new CodegenState(options);
-  var code = ast ? genElement(ast, state) : '_c("div")';
+  // fix #11483, Root level <script> tags should not be rendered.
+  var code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")';
   return {
     render: ("with(this){return " + code + "}"),
     staticRenderFns: state.staticRenderFns
@@ -3497,6 +3937,10 @@ function generate (
 }
 
 function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -3505,7 +3949,7 @@ function genElement (el, state) {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -3515,7 +3959,10 @@ function genElement (el, state) {
     if (el.component) {
       code = genComponent(el.component, el, state);
     } else {
-      var data = el.plain ? undefined : genData$2(el, state);
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData$2(el, state);
+      }
 
       var children = el.inlineTemplate ? null : genChildren(el, state, true);
       code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
@@ -3531,7 +3978,15 @@ function genElement (el, state) {
 // hoist static sub-trees out
 function genStatic (el, state) {
   el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
   state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
   return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
 }
 
@@ -3552,7 +4007,8 @@ function genOnce (el, state) {
     }
     if (!key) {
       process.env.NODE_ENV !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
       );
       return genElement(el, state)
     }
@@ -3620,6 +4076,7 @@ function genFor (
       "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
       "v-for should have explicit keys. " +
       "See https://vuejs.org/guide/list.html#key for more info.",
+      el.rawAttrsMap['v-for'],
       true /* tip */
     );
   }
@@ -3664,18 +4121,18 @@ function genData$2 (el, state) {
   }
   // attributes
   if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
+    data += "attrs:" + (genProps(el.attrs)) + ",";
   }
   // DOM props
   if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
+    data += "domProps:" + (genProps(el.props)) + ",";
   }
   // event handlers
   if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
+    data += (genHandlers(el.events, false)) + ",";
   }
   if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
+    data += (genHandlers(el.nativeEvents, true)) + ",";
   }
   // slot target
   // only for non-scoped slots
@@ -3684,7 +4141,7 @@ function genData$2 (el, state) {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
   }
   // component v-model
   if (el.model) {
@@ -3698,6 +4155,12 @@ function genData$2 (el, state) {
     }
   }
   data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data);
@@ -3726,7 +4189,7 @@ function genDirectives (el, state) {
     }
     if (needRuntime) {
       hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
     }
   }
   if (hasRuntime) {
@@ -3739,54 +4202,113 @@ function genInlineTemplate (el, state) {
   if (process.env.NODE_ENV !== 'production' && (
     el.children.length !== 1 || ast.type !== 1
   )) {
-    state.warn('Inline-template components must have exactly one child element.');
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
   }
-  if (ast.type === 1) {
+  if (ast && ast.type === 1) {
     var inlineRenderFns = generate(ast, state.options);
     return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
   }
 }
 
 function genScopedSlots (
+  el,
   slots,
   state
 ) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key,
   el,
   state
 ) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
     "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
 }
 
 function genChildren (
@@ -3805,13 +4327,16 @@ function genChildren (
       el$1.tag !== 'template' &&
       el$1.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el$1, state)
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
     }
-    var normalizationType = checkSkip
+    var normalizationType$1 = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
       : 0;
     var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
   }
 }
 
@@ -3849,7 +4374,7 @@ function needsNormalization (el) {
 function genNode (node, state) {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -3869,8 +4394,15 @@ function genComment (comment) {
 function genSlot (el, state) {
   var slotName = el.slotName || '"default"';
   var children = genChildren(el, state);
-  var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
+  var res = "_t(" + slotName + (children ? (",function(){return " + children + "}") : '');
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
   var bind$$1 = el.attrsMap['v-bind'];
   if ((attrs || bind$$1) && !children) {
     res += ",null";
@@ -3895,15 +4427,23 @@ function genComponent (
 }
 
 function genProps (props) {
-  var res = '';
+  var staticProps = "";
+  var dynamicProps = "";
   for (var i = 0; i < props.length; i++) {
     var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (transformSpecialNewlines(prop.value)) + ",";
+    var value = transformSpecialNewlines(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
     }
   }
-  return res.slice(0, -1)
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
 }
 
 // #3895, #4268
@@ -3915,6 +4455,8 @@ function transformSpecialNewlines (text) {
 
 /*  */
 
+
+
 // these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 var prohibitedKeywordRE = new RegExp('\\b' + (
@@ -3932,96 +4474,170 @@ var unaryOperatorsRE = new RegExp('\\b' + (
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
 // detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
+function detectErrors (ast, warn) {
   if (ast) {
-    checkNode(ast, errors);
+    checkNode(ast, warn);
   }
-  return errors
 }
 
-function checkNode (node, errors) {
+function checkNode (node, warn) {
   if (node.type === 1) {
     for (var name in node.attrsMap) {
       if (dirRE.test(name)) {
         var value = node.attrsMap[name];
         if (value) {
+          var range = node.rawAttrsMap[name];
           if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
+            checkFor(node, ("v-for=\"" + value + "\""), warn, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn, range);
           } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
+            checkEvent(value, (name + "=\"" + value + "\""), warn, range);
           } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
+            checkExpression(value, (name + "=\"" + value + "\""), warn, range);
           }
         }
       }
     }
     if (node.children) {
       for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+        checkNode(node.children[i], warn);
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
+    checkExpression(node.expression, node.text, warn, node);
   }
 }
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp, text, warn, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
       "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
     );
   }
-  checkExpression(exp, text, errors);
+  checkExpression(exp, text, warn, range);
 }
 
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+function checkFor (node, text, warn, range) {
+  checkExpression(node.for || '', text, warn, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
 }
 
 function checkIdentifier (
   ident,
   type,
   text,
-  errors
+  warn,
+  range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(("var " + ident + "=_"));
     } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+      warn(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
     }
   }
 }
 
-function checkExpression (exp, text, errors) {
+function checkExpression (exp, text, warn, range) {
   try {
     new Function(("return " + exp));
   } catch (e) {
     var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
     if (keywordMatch) {
-      errors.push(
+      warn(
         "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
       );
     } else {
-      errors.push(
+      warn(
         "invalid expression: " + (e.message) + " in\n\n" +
         "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
       );
     }
   }
 }
 
+function checkFunctionParameterExpression (exp, text, warn, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
 /*  */
 
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
+/*  */
+
+
+
 function createFunction (code, errors) {
   try {
     return new Function(code)
@@ -4075,14 +4691,28 @@ function createCompileToFunctionFn (compile) {
     // check compilation errors/tips
     if (process.env.NODE_ENV !== 'production') {
       if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
       }
     }
 
@@ -4128,11 +4758,29 @@ function createCompilerCreator (baseCompile) {
       var finalOptions = Object.create(baseOptions);
       var errors = [];
       var tips = [];
-      finalOptions.warn = function (msg, tip) {
+
+      var warn = function (msg, range, tip) {
         (tip ? tips : errors).push(msg);
       };
 
       if (options) {
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -4153,9 +4801,11 @@ function createCompilerCreator (baseCompile) {
         }
       }
 
-      var compiled = baseCompile(template, finalOptions);
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
       if (process.env.NODE_ENV !== 'production') {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        detectErrors(compiled.ast, warn);
       }
       compiled.errors = errors;
       compiled.tips = tips;
@@ -4201,9 +4851,9 @@ var compileToFunctions = ref.compileToFunctions;
 var isAttr = makeMap(
   'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
   'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
+  'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+  'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
   'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
   'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
   'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
@@ -4211,7 +4861,7 @@ var isAttr = makeMap(
   'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
   'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
   'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
+  'target,title,usemap,value,width,wrap'
 );
 
 /* istanbul ignore next */
@@ -4222,6 +4872,7 @@ var isRenderableAttr = function (name) {
     name.indexOf('aria-') === 0
   )
 };
+
 var propsToAttrMap = {
   acceptCharset: 'accept-charset',
   className: 'class',
@@ -4246,6 +4897,9 @@ function escapeChar (a) {
 
 /*  */
 
+
+
+
 var plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/;
 
 // let the model AST transform translate v-model into appropriate
@@ -4325,7 +4979,7 @@ function genClassSegments (
   classBinding
 ) {
   if (staticClass && !classBinding) {
-    return [{ type: RAW, value: (" class=" + staticClass) }]
+    return [{ type: RAW, value: (" class=\"" + (JSON.parse(staticClass)) + "\"") }]
   } else {
     return [{
       type: EXPRESSION,
@@ -4354,16 +5008,6 @@ function genStyleSegments (
 
 /*  */
 
-/**
- * In SSR, the vdom tree is generated only once and never patched, so
- * we can optimize most element / trees into plain string render functions.
- * The SSR optimizer walks the AST tree to detect optimizable elements and trees.
- *
- * The criteria for SSR optimizability is quite a bit looser than static tree
- * detection (which is designed for client re-render). In SSR we bail only for
- * components/slots/custom directives.
- */
-
 // optimizability constants
 var optimizability = {
   FALSE: 0,    // whole sub tree un-optimizable
@@ -4436,6 +5080,7 @@ function optimizeSiblings (el) {
         tag: 'template',
         attrsList: [],
         attrsMap: {},
+        rawAttrsMap: {},
         children: currentOptimizableGroup,
         ssrOptimizability: optimizability.FULL
       });
@@ -4493,9 +5138,8 @@ function isSelectWithModel (node) {
 
 /*  */
 
-// The SSR codegen is essentially extending the default codegen to handle
-// SSR-optimizable nodes and turn them into string render fns. In cases where
-// a node is not optimizable it simply falls back to the default codegen.
+
+
 
 // segment types
 var RAW = 0;
@@ -4684,7 +5328,11 @@ function nodesToSegments (
     } else if (c.type === 2) {
       segments.push({ type: INTERPOLATION, value: c.expression });
     } else if (c.type === 3) {
-      segments.push({ type: RAW, value: escape(c.text) });
+      var text = escape(c.text);
+      if (c.isComment) {
+        text = '<!--' + text + '-->';
+      }
+      segments.push({ type: RAW, value: text });
     }
   }
   return segments
@@ -4747,3 +5395,4 @@ exports.compile = compile;
 exports.compileToFunctions = compileToFunctions;
 exports.ssrCompile = compile$1;
 exports.ssrCompileToFunctions = compileToFunctions$1;
+exports.generateCodeFrame = generateCodeFrame;
diff --git a/packages/vue-template-compiler/index.js b/packages/vue-template-compiler/index.js
index 287d281738e..dcc7e6cbe9c 100644
--- a/packages/vue-template-compiler/index.js
+++ b/packages/vue-template-compiler/index.js
@@ -5,10 +5,12 @@ try {
 var packageName = require('./package.json').name
 var packageVersion = require('./package.json').version
 if (vueVersion && vueVersion !== packageVersion) {
+  var vuePath = require.resolve('vue')
+  var packagePath = require.resolve('./package.json')
   throw new Error(
     '\n\nVue packages version mismatch:\n\n' +
-    '- vue@' + vueVersion + '\n' +
-    '- ' + packageName + '@' + packageVersion + '\n\n' +
+    '- vue@' + vueVersion + ' (' + vuePath + ')\n' +
+    '- ' + packageName + '@' + packageVersion + ' (' + packagePath + ')\n\n' +
     'This may cause things to work incorrectly. Make sure to use the same version for both.\n' +
     'If you are using vue-loader@>=10.0, simply update vue-template-compiler.\n' +
     'If you are using vue-loader@<10.0 or vueify, re-installing vue-loader/vueify should bump ' + packageName + ' to the latest.\n'
diff --git a/packages/vue-template-compiler/package.json b/packages/vue-template-compiler/package.json
index 51fbc9c276c..c8fff729bc2 100644
--- a/packages/vue-template-compiler/package.json
+++ b/packages/vue-template-compiler/package.json
@@ -1,11 +1,12 @@
 {
   "name": "vue-template-compiler",
-  "version": "2.5.13",
+  "version": "2.6.14",
   "description": "template compiler for Vue 2.0",
   "main": "index.js",
   "unpkg": "browser.js",
   "jsdelivr": "browser.js",
   "browser": "browser.js",
+  "types": "types/index.d.ts",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/vuejs/vue.git"
@@ -23,5 +24,8 @@
   "dependencies": {
     "he": "^1.1.0",
     "de-indent": "^1.0.2"
+  },
+  "devDependencies": {
+    "vue": "file:../.."
   }
 }
diff --git a/packages/vue-template-compiler/types/index.d.ts b/packages/vue-template-compiler/types/index.d.ts
new file mode 100644
index 00000000000..d84b3af678e
--- /dev/null
+++ b/packages/vue-template-compiler/types/index.d.ts
@@ -0,0 +1,250 @@
+import Vue, { VNode } from "vue"
+
+/*
+ * Template compilation options / results
+ */
+interface CompilerOptions {
+  modules?: ModuleOptions[];
+  directives?: Record<string, DirectiveFunction>;
+  preserveWhitespace?: boolean;
+  whitespace?: 'preserve' | 'condense';
+  outputSourceRange?: any
+}
+
+interface CompilerOptionsWithSourceRange extends CompilerOptions {
+  outputSourceRange: true
+}
+
+interface ErrorWithRange {
+  msg: string;
+  start: number;
+  end: number;
+}
+
+interface CompiledResult<ErrorType> {
+  ast: ASTElement | undefined;
+  render: string;
+  staticRenderFns: string[];
+  errors: ErrorType[];
+  tips: ErrorType[];
+}
+
+interface CompiledResultFunctions {
+  render: () => VNode;
+  staticRenderFns: (() => VNode)[];
+}
+
+interface ModuleOptions {
+  preTransformNode: (el: ASTElement) => ASTElement | undefined;
+  transformNode: (el: ASTElement) => ASTElement | undefined;
+  postTransformNode: (el: ASTElement) => void;
+  genData: (el: ASTElement) => string;
+  transformCode?: (el: ASTElement, code: string) => string;
+  staticKeys?: string[];
+}
+
+type DirectiveFunction = (node: ASTElement, directiveMeta: ASTDirective) => void;
+
+/*
+ * AST Types
+ */
+
+/**
+ * - 0: FALSE - whole sub tree un-optimizable
+ * - 1: FULL - whole sub tree optimizable
+ * - 2: SELF - self optimizable but has some un-optimizable children
+ * - 3: CHILDREN - self un-optimizable but have fully optimizable children
+ * - 4: PARTIAL - self un-optimizable with some un-optimizable children
+ */
+export type SSROptimizability = 0 | 1 | 2 | 3 | 4
+
+export interface ASTModifiers {
+  [key: string]: boolean;
+}
+
+export interface ASTIfCondition {
+  exp: string | undefined;
+  block: ASTElement;
+}
+
+export interface ASTElementHandler {
+  value: string;
+  params?: any[];
+  modifiers: ASTModifiers | undefined;
+}
+
+export interface ASTElementHandlers {
+  [key: string]: ASTElementHandler | ASTElementHandler[];
+}
+
+export interface ASTDirective {
+  name: string;
+  rawName: string;
+  value: string;
+  arg: string | undefined;
+  modifiers: ASTModifiers | undefined;
+}
+
+export type ASTNode = ASTElement | ASTText | ASTExpression;
+
+export interface ASTElement {
+  type: 1;
+  tag: string;
+  attrsList: { name: string; value: any }[];
+  attrsMap: Record<string, any>;
+  parent: ASTElement | undefined;
+  children: ASTNode[];
+
+  processed?: true;
+
+  static?: boolean;
+  staticRoot?: boolean;
+  staticInFor?: boolean;
+  staticProcessed?: boolean;
+  hasBindings?: boolean;
+
+  text?: string;
+  attrs?: { name: string; value: any }[];
+  props?: { name: string; value: string }[];
+  plain?: boolean;
+  pre?: true;
+  ns?: string;
+
+  component?: string;
+  inlineTemplate?: true;
+  transitionMode?: string | null;
+  slotName?: string;
+  slotTarget?: string;
+  slotScope?: string;
+  scopedSlots?: Record<string, ASTElement>;
+
+  ref?: string;
+  refInFor?: boolean;
+
+  if?: string;
+  ifProcessed?: boolean;
+  elseif?: string;
+  else?: true;
+  ifConditions?: ASTIfCondition[];
+
+  for?: string;
+  forProcessed?: boolean;
+  key?: string;
+  alias?: string;
+  iterator1?: string;
+  iterator2?: string;
+
+  staticClass?: string;
+  classBinding?: string;
+  staticStyle?: string;
+  styleBinding?: string;
+  events?: ASTElementHandlers;
+  nativeEvents?: ASTElementHandlers;
+
+  transition?: string | true;
+  transitionOnAppear?: boolean;
+
+  model?: {
+    value: string;
+    callback: string;
+    expression: string;
+  };
+
+  directives?: ASTDirective[];
+
+  forbidden?: true;
+  once?: true;
+  onceProcessed?: boolean;
+  wrapData?: (code: string) => string;
+  wrapListeners?: (code: string) => string;
+
+  // 2.4 ssr optimization
+  ssrOptimizability?: SSROptimizability;
+
+  // weex specific
+  appendAsTree?: boolean;
+}
+
+export interface ASTExpression {
+  type: 2;
+  expression: string;
+  text: string;
+  tokens: (string | Record<string, any>)[];
+  static?: boolean;
+  // 2.4 ssr optimization
+  ssrOptimizability?: SSROptimizability;
+}
+
+export interface ASTText {
+  type: 3;
+  text: string;
+  static?: boolean;
+  isComment?: boolean;
+  // 2.4 ssr optimization
+  ssrOptimizability?: SSROptimizability;
+}
+
+/*
+ * SFC parser related types
+ */
+interface SFCParserOptions {
+  pad?: true | 'line' | 'space';
+  deindent?: boolean
+}
+
+export interface SFCBlock {
+  type: string;
+  content: string;
+  attrs: Record<string, string>;
+  start?: number;
+  end?: number;
+  lang?: string;
+  src?: string;
+  scoped?: boolean;
+  module?: string | boolean;
+}
+
+export interface SFCDescriptor {
+  template: SFCBlock | undefined;
+  script: SFCBlock | undefined;
+  styles: SFCBlock[];
+  customBlocks: SFCBlock[];
+}
+
+/*
+ * Exposed functions
+ */
+export function compile(
+  template: string,
+  options: CompilerOptionsWithSourceRange
+): CompiledResult<ErrorWithRange>
+
+export function compile(
+  template: string,
+  options?: CompilerOptions
+): CompiledResult<string>;
+
+export function compileToFunctions(template: string): CompiledResultFunctions;
+
+export function ssrCompile(
+  template: string,
+  options: CompilerOptionsWithSourceRange
+): CompiledResult<ErrorWithRange>;
+
+export function ssrCompile(
+  template: string,
+  options?: CompilerOptions
+): CompiledResult<string>;
+
+export function ssrCompileToFunctions(template: string): CompiledResultFunctions;
+
+export function parseComponent(
+  file: string,
+  options?: SFCParserOptions
+): SFCDescriptor;
+
+export function generateCodeFrame(
+  template: string,
+  start: number,
+  end: number
+): string;
diff --git a/packages/vue-template-compiler/types/test.ts b/packages/vue-template-compiler/types/test.ts
new file mode 100644
index 00000000000..b0e6cb1549f
--- /dev/null
+++ b/packages/vue-template-compiler/types/test.ts
@@ -0,0 +1,90 @@
+import Vue, { VNode } from "vue";
+import {
+  compile,
+  compileToFunctions,
+  ssrCompile,
+  ssrCompileToFunctions,
+  parseComponent,
+  generateCodeFrame
+} from "./";
+
+// check compile options
+const compiled = compile("<div>hi</div>", {
+  outputSourceRange: true,
+  preserveWhitespace: false,
+  whitespace: 'condense',
+  modules: [
+    {
+      preTransformNode: el => el,
+      transformNode: el => el,
+      postTransformNode: el => {
+        el.tag = "p";
+      },
+      genData: el => el.tag,
+      transformCode: (el, code) => code,
+      staticKeys: ["test"]
+    }
+  ],
+  directives: {
+    test: (node, directiveMeta) => {
+      node.tag;
+      directiveMeta.value;
+    }
+  }
+});
+
+// can be passed to function constructor
+new Function(compiled.render);
+compiled.staticRenderFns.map(fn => new Function(fn));
+
+// with outputSourceRange: true
+// errors should be objects with range
+compiled.errors.forEach(e => {
+  console.log(e.msg)
+})
+
+// without option or without outputSourceRange: true, should be strings
+const { errors } = compile(`foo`)
+errors.forEach(e => {
+  console.log(e.length)
+})
+
+const { errors: errors2 } = compile(`foo`, {})
+errors2.forEach(e => {
+  console.log(e.length)
+})
+
+const { errors: errors3 } = compile(`foo`, {
+  outputSourceRange: false
+})
+errors3.forEach(e => {
+  console.log(e.length)
+})
+
+const compiledFns = compileToFunctions("<div>hi</div>");
+
+// can be passed to component render / staticRenderFns options
+const vm = new Vue({
+  data() {
+    return {
+      test: "Test"
+    };
+  },
+  render: compiledFns.render,
+  staticRenderFns: compiledFns.staticRenderFns
+});
+
+// can be called with component instance
+const vnode: VNode = compiledFns.render.call(vm);
+
+// check SFC parser
+const desc = parseComponent("<template></template>", {
+  pad: "space",
+  deindent: false
+});
+
+const templateContent: string = desc.template!.content;
+const scriptContent: string = desc.script!.content;
+const styleContent: string = desc.styles.map(s => s.content).join("\n");
+
+const codeframe: string = generateCodeFrame(`foobar`, 0, 4)
diff --git a/packages/vue-template-compiler/types/tsconfig.json b/packages/vue-template-compiler/types/tsconfig.json
new file mode 100644
index 00000000000..084dd317ea1
--- /dev/null
+++ b/packages/vue-template-compiler/types/tsconfig.json
@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "strict": true,
+    "noEmit": true
+  },
+  "compileOnSave": false,
+  "include": [
+    "**/*.ts"
+  ]
+}
diff --git a/packages/weex-template-compiler/build.js b/packages/weex-template-compiler/build.js
index 9da2ee9597c..ba0e498cbc6 100644
--- a/packages/weex-template-compiler/build.js
+++ b/packages/weex-template-compiler/build.js
@@ -10,20 +10,24 @@ var he = _interopDefault(require('he'));
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
-
-
-
-
-
-
-
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
+function isUndef (v) {
+  return v === undefined || v === null
+}
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
-
+function isPrimitive (value) {
+  return (
+    typeof value === 'string' ||
+    typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
+    typeof value === 'boolean'
+  )
+}
 
 /**
  * Quick object check - this is primarily used to tell
@@ -35,7 +39,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -51,8 +55,6 @@ function isPlainObject (obj) {
   return _toString.call(obj) === '[object Object]'
 }
 
-
-
 /**
  * Check if val is a valid array index.
  */
@@ -61,17 +63,6 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
-/**
- * Convert a value to a string that is actually rendered.
- */
-
-
-/**
- * Convert a input value to a number for persistence.
- * If the conversion fails, return original string.
- */
-
-
 /**
  * Make a map and return a function for checking if a key
  * is in that map.
@@ -96,12 +87,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -113,7 +104,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -140,21 +131,43 @@ var camelize = cached(function (str) {
 });
 
 /**
- * Capitalize a string.
+ * Hyphenate a camelCase string.
  */
-
-
-
+var hyphenateRE = /\B([A-Z])/g;
+var hyphenate = cached(function (str) {
+  return str.replace(hyphenateRE, '-$1').toLowerCase()
+});
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
 
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
+  function boundFn (a) {
+    var l = arguments.length;
+    return l
+      ? l > 1
+        ? fn.apply(ctx, arguments)
+        : fn.call(ctx, a)
+      : fn.call(ctx)
+  }
 
-/**
- * Convert an Array-like object to a real Array.
- */
+  boundFn._length = fn.length;
+  return boundFn
+}
 
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
 
 /**
  * Mix properties into target object.
@@ -166,15 +179,12 @@ function extend (to, _from) {
   return to
 }
 
-/**
- * Merge an Array of Objects into a single Object.
- */
-
+/* eslint-disable no-unused-vars */
 
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -183,13 +193,15 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 var identity = function (_) { return _; };
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 function genStaticKeys (modules) {
   return modules.reduce(function (keys, m) {
@@ -197,18 +209,6 @@ function genStaticKeys (modules) {
   }, []).join(',')
 }
 
-/**
- * Check if two values are loosely equal - that is,
- * if they are plain objects, do they have the same shape?
- */
-
-
-
-
-/**
- * Ensure a function is called only once.
- */
-
 /*  */
 
 var isUnaryTag = makeMap(
@@ -232,35 +232,44 @@ var isNonPhrasingTag = makeMap(
   'title,tr,track'
 );
 
+/*  */
+
 /**
- * Not type-checking this file because it's mostly vendor code.
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
+/**
+ * Define a property.
  */
+function def (obj, key, val, enumerable) {
+  Object.defineProperty(obj, key, {
+    value: val,
+    enumerable: !!enumerable,
+    writable: true,
+    configurable: true
+  });
+}
 
-/*!
- * HTML Parser By John Resig (ejohn.org)
- * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
- * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+/**
+ * Not type-checking this file because it's mostly vendor code.
  */
 
 // Regular Expressions for parsing tags and attributes
 var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-var ncname = '[a-zA-Z_][\\w\\-\\.]*';
+var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
+var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + (unicodeRegExp.source) + "]*";
 var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
 var startTagOpen = new RegExp(("^<" + qnameCapture));
 var startTagClose = /^\s*(\/?)>/;
 var endTag = new RegExp(("^<\\/" + qnameCapture + "[^>]*>"));
 var doctype = /^<!DOCTYPE [^>]+>/i;
-var comment = /^<!--/;
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
+var comment = /^<!\--/;
 var conditionalComment = /^<!\[/;
 
-var IS_REGEX_CAPTURING_BROKEN = false;
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === '';
-});
-
 // Special Elements (can contain anything)
 var isPlainTextElement = makeMap('script,style,textarea', true);
 var reCache = {};
@@ -271,10 +280,11 @@ var decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 };
-var encodedAttr = /&(?:lt|gt|quot|amp);/g;
-var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g;
+var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
+var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g;
 
 // #5992
 var isIgnoreNewlineTag = makeMap('pre,textarea', true);
@@ -304,7 +314,7 @@ function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd));
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
             }
             advance(commentEnd + 3);
             continue
@@ -341,7 +351,7 @@ function parseHTML (html, options) {
         var startTagMatch = parseStartTag();
         if (startTagMatch) {
           handleStartTag(startTagMatch);
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1);
           }
           continue
@@ -364,16 +374,18 @@ function parseHTML (html, options) {
           rest = html.slice(textEnd);
         }
         text = html.substring(0, textEnd);
-        advance(textEnd);
       }
 
       if (textEnd < 0) {
         text = html;
-        html = '';
+      }
+
+      if (text) {
+        advance(text.length);
       }
 
       if (options.chars && text) {
-        options.chars(text);
+        options.chars(text, index - text.length, index);
       }
     } else {
       var endTagLength = 0;
@@ -383,7 +395,7 @@ function parseHTML (html, options) {
         endTagLength = endTag.length;
         if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
           text = text
-            .replace(/<!--([\s\S]*?)-->/g, '$1')
+            .replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
             .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
         }
         if (shouldIgnoreFirstNewline(stackedTag, text)) {
@@ -402,7 +414,7 @@ function parseHTML (html, options) {
     if (html === last) {
       options.chars && options.chars(html);
       if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""));
+        options.warn(("Mal-formatted tag at end of template: \"" + html + "\""), { start: index + html.length });
       }
       break
     }
@@ -426,8 +438,10 @@ function parseHTML (html, options) {
       };
       advance(start[0].length);
       var end, attr;
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index;
         advance(attr[0].length);
+        attr.end = index;
         match.attrs.push(attr);
       }
       if (end) {
@@ -458,12 +472,6 @@ function parseHTML (html, options) {
     var attrs = new Array(l);
     for (var i = 0; i < l; i++) {
       var args = match.attrs[i];
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3]; }
-        if (args[4] === '') { delete args[4]; }
-        if (args[5] === '') { delete args[5]; }
-      }
       var value = args[3] || args[4] || args[5] || '';
       var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -472,10 +480,14 @@ function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       };
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length;
+        attrs[i].end = args.end;
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs });
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end });
       lastTag = tagName;
     }
 
@@ -489,12 +501,9 @@ function parseHTML (html, options) {
     if (start == null) { start = index; }
     if (end == null) { end = index; }
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase();
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase();
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -513,7 +522,8 @@ function parseHTML (html, options) {
           options.warn
         ) {
           options.warn(
-            ("tag <" + (stack[i].tag) + "> has no matching end tag.")
+            ("tag <" + (stack[i].tag) + "> has no matching end tag."),
+            { start: stack[i].start, end: stack[i].end }
           );
         }
         if (options.end) {
@@ -633,13 +643,13 @@ function wrapFilter (exp, filter) {
   } else {
     var name = filter.slice(0, i);
     var args = filter.slice(i + 1);
-    return ("_f(\"" + name + "\")(" + exp + "," + args)
+    return ("_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args))
   }
 }
 
 /*  */
 
-var defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g;
+var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
 var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
 
 var buildRegex = cached(function (delimiters) {
@@ -704,8 +714,8 @@ function genComponentModel (
   if (trim) {
     valueExpression =
       "(typeof " + baseValueExpression + " === 'string'" +
-        "? " + baseValueExpression + ".trim()" +
-        ": " + baseValueExpression + ")";
+      "? " + baseValueExpression + ".trim()" +
+      ": " + baseValueExpression + ")";
   }
   if (number) {
     valueExpression = "_n(" + valueExpression + ")";
@@ -714,7 +724,7 @@ function genComponentModel (
 
   el.model = {
     value: ("(" + value + ")"),
-    expression: ("\"" + value + "\""),
+    expression: JSON.stringify(value),
     callback: ("function (" + baseValueExpression + ") {" + assignment + "}")
   };
 }
@@ -749,16 +759,14 @@ function genAssignmentCode (
  *
  */
 
-var len;
-var str;
-var chr;
-var index;
-var expressionPos;
-var expressionEndPos;
+var len, str, chr, index, expressionPos, expressionEndPos;
 
 
 
 function parseModel (val) {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim();
   len = val.length;
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
@@ -837,7 +845,6 @@ function parseString (chr) {
 
 /*  */
 
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -852,18 +859,16 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
-
-
 if (inBrowser) {
   try {
     var opts = {};
     Object.defineProperty(opts, 'passive', ({
       get: function get () {
-        /* istanbul ignore next */
-        
       }
     })); // https://github.com/facebook/flow/issues/285
     window.addEventListener('test-passive', null, opts);
@@ -876,10 +881,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -899,20 +904,40 @@ var hasSymbol =
   typeof Symbol !== 'undefined' && isNative(Symbol) &&
   typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);
 
+var _Set;
 /* istanbul ignore if */ // $flow-disable-line
 if (typeof Set !== 'undefined' && isNative(Set)) {
   // use native Set when available.
-  
+  _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  
+  _Set = /*@__PURE__*/(function () {
+    function Set () {
+      this.set = Object.create(null);
+    }
+    Set.prototype.has = function has (key) {
+      return this.set[key] === true
+    };
+    Set.prototype.add = function add (key) {
+      this.set[key] = true;
+    };
+    Set.prototype.clear = function clear () {
+      this.set = Object.create(null);
+    };
+
+    return Set;
+  }());
 }
 
 /*  */
 
-function baseWarn (msg) {
+
+
+/* eslint-disable no-unused-vars */
+function baseWarn (msg, range) {
   console.error(("[Vue compiler]: " + msg));
 }
+/* eslint-enable no-unused-vars */
 
 function pluckModuleFunction (
   modules,
@@ -923,20 +948,23 @@ function pluckModuleFunction (
     : []
 }
 
-function addProp (el, name, value) {
-  (el.props || (el.props = [])).push({ name: name, value: value });
+function addProp (el, name, value, range, dynamic) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
-function addAttr (el, name, value) {
-  (el.attrs || (el.attrs = [])).push({ name: name, value: value });
+function addAttr (el, name, value, range, dynamic) {
+  var attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []));
+  attrs.push(rangeSetItem({ name: name, value: value, dynamic: dynamic }, range));
   el.plain = false;
 }
 
 // add a raw attr (use this in preTransforms)
-function addRawAttr (el, name, value) {
+function addRawAttr (el, name, value, range) {
   el.attrsMap[name] = value;
-  el.attrsList.push({ name: name, value: value });
+  el.attrsList.push(rangeSetItem({ name: name, value: value }, range));
 }
 
 function addDirective (
@@ -945,19 +973,36 @@ function addDirective (
   rawName,
   value,
   arg,
-  modifiers
+  isDynamicArg,
+  modifiers,
+  range
 ) {
-  (el.directives || (el.directives = [])).push({ name: name, rawName: rawName, value: value, arg: arg, modifiers: modifiers });
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name: name,
+    rawName: rawName,
+    value: value,
+    arg: arg,
+    isDynamicArg: isDynamicArg,
+    modifiers: modifiers
+  }, range));
   el.plain = false;
 }
 
+function prependModifierMarker (symbol, name, dynamic) {
+  return dynamic
+    ? ("_p(" + name + ",\"" + symbol + "\")")
+    : symbol + name // mark the event as captured
+}
+
 function addHandler (
   el,
   name,
   value,
   modifiers,
   important,
-  warn
+  warn,
+  range,
+  dynamic
 ) {
   modifiers = modifiers || emptyObject;
   // warn prevent and passive modifier
@@ -968,35 +1013,42 @@ function addHandler (
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     );
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'contextmenu';
+      delete modifiers.right;
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
+    } else if (name === 'click') {
+      name = 'mouseup';
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture;
-    name = '!' + name; // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic);
   }
   if (modifiers.once) {
     delete modifiers.once;
-    name = '~' + name; // mark the event as once
+    name = prependModifierMarker('~', name, dynamic);
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive;
-    name = '&' + name; // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu';
-      delete modifiers.right;
-    } else if (modifiers.middle) {
-      name = 'mouseup';
-    }
+    name = prependModifierMarker('&', name, dynamic);
   }
 
   var events;
@@ -1007,7 +1059,7 @@ function addHandler (
     events = el.events || (el.events = {});
   }
 
-  var newHandler = { value: value };
+  var newHandler = rangeSetItem({ value: value.trim(), dynamic: dynamic }, range);
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers;
   }
@@ -1025,6 +1077,15 @@ function addHandler (
   el.plain = false;
 }
 
+function getRawBindingAttr (
+  el,
+  name
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
 function getBindingAttr (
   el,
   name,
@@ -1068,35 +1129,69 @@ function getAndRemoveAttr (
   return val
 }
 
+function getAndRemoveAttrByRegex (
+  el,
+  name
+) {
+  var list = el.attrsList;
+  for (var i = 0, l = list.length; i < l; i++) {
+    var attr = list[i];
+    if (name.test(attr.name)) {
+      list.splice(i, 1);
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item,
+  range
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start;
+    }
+    if (range.end != null) {
+      item.end = range.end;
+    }
+  }
+  return item
+}
+
 /*  */
 
 var onRE = /^@|^v-on:/;
-var dirRE = /^v-|^@|^:/;
-var forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/;
+var dirRE = /^v-|^@|^:|^#/;
+var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
 var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
 var stripParensRE = /^\(|\)$/g;
+var dynamicArgRE = /^\[.*\]$/;
 
 var argRE = /:(.*)$/;
-var bindRE = /^:|^v-bind:/;
-var modifierRE = /\.[^.]+/g;
+var bindRE = /^:|^\.|^v-bind:/;
+var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
+
+var slotRE = /^v-slot(:|$)|^#/;
+
+var lineBreakRE = /[\r\n]/;
+var whitespaceRE = /\s+/g;
 
-var literalValueRE = /^(\{.*\}|\[.*\])$/;
+var invalidAttributeRE = /[\s"'<>\/=]/;
 
 var decodeHTMLCached = cached(he.decode);
 
+var emptySlotScopeToken = "_empty_";
+
 // configurable state
 var warn;
-var literalPropId;
 var delimiters;
 var transforms;
 var preTransforms;
 var postTransforms;
 var platformIsPreTag;
 var platformMustUseProp;
-var platformIsReservedTag;
 var platformGetTagNamespace;
-
-
+var maybeComponent;
 
 function createASTElement (
   tag,
@@ -1108,6 +1203,7 @@ function createASTElement (
     tag: tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent: parent,
     children: []
   }
@@ -1121,12 +1217,12 @@ function parse (
   options
 ) {
   warn = options.warn || baseWarn;
-  literalPropId = 0;
 
   platformIsPreTag = options.isPreTag || no;
   platformMustUseProp = options.mustUseProp || no;
-  platformIsReservedTag = options.isReservedTag || no;
   platformGetTagNamespace = options.getTagNamespace || no;
+  var isReservedTag = options.isReservedTag || no;
+  maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
 
   transforms = pluckModuleFunction(options.modules, 'transformNode');
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
@@ -1136,20 +1232,67 @@ function parse (
 
   var stack = [];
   var preserveWhitespace = options.preserveWhitespace !== false;
+  var whitespaceOption = options.whitespace;
   var root;
   var currentParent;
   var inVPre = false;
   var inPre = false;
   var warned = false;
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true;
-      warn(msg);
+      warn(msg, range);
     }
   }
 
   function closeElement (element) {
+    trimEndingWhitespace(element);
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options);
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(element);
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        });
+      } else if (process.env.NODE_ENV !== 'production') {
+        warnOnce(
+          "Component template should contain exactly one root element. " +
+          "If you are using v-if on multiple elements, " +
+          "use v-else-if to chain them instead.",
+          { start: element.start }
+        );
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent);
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          var name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
+        }
+        currentParent.children.push(element);
+        element.parent = currentParent;
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(function (c) { return !(c).slotScope; });
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element);
+
     // check pre state
     if (element.pre) {
       inVPre = false;
@@ -1163,6 +1306,37 @@ function parse (
     }
   }
 
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      var lastNode;
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop();
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        "Cannot use <" + (el.tag) + "> as component root element because it may " +
+        'contain multiple nodes.',
+        { start: el.start }
+      );
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      );
+    }
+  }
+
   parseHTML(template, {
     warn: warn,
     expectHTML: options.expectHTML,
@@ -1171,7 +1345,8 @@ function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start: function start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start: function start (tag, attrs, unary, start$1, end) {
       // check namespace.
       // inherit parent ns if there is one
       var ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag);
@@ -1187,12 +1362,36 @@ function parse (
         element.ns = ns;
       }
 
+      if (process.env.NODE_ENV !== 'production') {
+        if (options.outputSourceRange) {
+          element.start = start$1;
+          element.end = end;
+          element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
+            cumulated[attr.name] = attr;
+            return cumulated
+          }, {});
+        }
+        attrs.forEach(function (attr) {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn(
+              "Invalid dynamic argument expression: attribute names cannot contain " +
+              "spaces, quotes, <, >, / or =.",
+              {
+                start: attr.start + attr.name.indexOf("["),
+                end: attr.start + attr.name.length
+              }
+            );
+          }
+        });
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true;
         process.env.NODE_ENV !== 'production' && warn(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          "<" + tag + ">" + ', as they will not be parsed.'
+          "<" + tag + ">" + ', as they will not be parsed.',
+          { start: element.start }
         );
       }
 
@@ -1217,58 +1416,15 @@ function parse (
         processFor(element);
         processIf(element);
         processOnce(element);
-        // element-scope stuff
-        processElement(element, options);
       }
 
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              "Cannot use <" + (el.tag) + "> as component root element because it may " +
-              'contain multiple nodes.'
-            );
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            );
-          }
-        }
-      }
-
-      // tree management
       if (!root) {
         root = element;
-        checkRootConstraints(root);
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element);
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          });
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            "Component template should contain exactly one root element. " +
-            "If you are using v-if on multiple elements, " +
-            "use v-else-if to chain them instead."
-          );
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent);
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false;
-          var name = element.slotTarget || '"default"';(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
-        } else {
-          currentParent.children.push(element);
-          element.parent = currentParent;
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(root);
         }
       }
+
       if (!unary) {
         currentParent = element;
         stack.push(element);
@@ -1277,29 +1433,29 @@ function parse (
       }
     },
 
-    end: function end () {
-      // remove trailing whitespace
+    end: function end (tag, start, end$1) {
       var element = stack[stack.length - 1];
-      var lastNode = element.children[element.children.length - 1];
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop();
-      }
       // pop stack
       stack.length -= 1;
       currentParent = stack[stack.length - 1];
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        element.end = end$1;
+      }
       closeElement(element);
     },
 
-    chars: function chars (text) {
+    chars: function chars (text, start, end) {
       if (!currentParent) {
         if (process.env.NODE_ENV !== 'production') {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start: start }
             );
           } else if ((text = text.trim())) {
             warnOnce(
-              ("text \"" + text + "\" outside root element will be ignored.")
+              ("text \"" + text + "\" outside root element will be ignored."),
+              { start: start }
             );
           }
         }
@@ -1314,33 +1470,66 @@ function parse (
         return
       }
       var children = currentParent.children;
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : '';
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = '';
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' ';
+        } else {
+          text = ' ';
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : '';
+      }
       if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE, ' ');
+        }
         var res;
+        var child;
         if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
+          child = {
             type: 2,
             expression: res.expression,
             tokens: res.tokens,
             text: text
-          });
+          };
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text: text
-          });
+          };
+        }
+        if (child) {
+          if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+            child.start = start;
+            child.end = end;
+          }
+          children.push(child);
         }
       }
     },
-    comment: function comment (text) {
-      currentParent.children.push({
-        type: 3,
-        text: text,
-        isComment: true
-      });
+    comment: function comment (text, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        var child = {
+          type: 3,
+          text: text,
+          isComment: true
+        };
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          child.start = start;
+          child.end = end;
+        }
+        currentParent.children.push(child);
+      }
     }
   });
   return root
@@ -1353,14 +1542,19 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  var l = el.attrsList.length;
-  if (l) {
-    var attrs = el.attrs = new Array(l);
-    for (var i = 0; i < l; i++) {
+  var list = el.attrsList;
+  var len = list.length;
+  if (len) {
+    var attrs = el.attrs = new Array(len);
+    for (var i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
       };
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start;
+        attrs[i].end = list[i].end;
+      }
     }
   } else if (!el.pre) {
     // non root node in pre blocks with no attributes
@@ -1368,27 +1562,53 @@ function processRawAttrs (el) {
   }
 }
 
-function processElement (element, options) {
+function processElement (
+  element,
+  options
+) {
   processKey(element);
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length;
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  );
 
   processRef(element);
-  processSlot(element);
+  processSlotContent(element);
+  processSlotOutlet(element);
   processComponent(element);
   for (var i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element;
   }
   processAttrs(element);
+  return element
 }
 
 function processKey (el) {
   var exp = getBindingAttr(el, 'key');
   if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn("<template> cannot be keyed. Place the key on real elements instead.");
+    if (process.env.NODE_ENV !== 'production') {
+      if (el.tag === 'template') {
+        warn(
+          "<template> cannot be keyed. Place the key on real elements instead.",
+          getRawBindingAttr(el, 'key')
+        );
+      }
+      if (el.for) {
+        var iterator = el.iterator2 || el.iterator1;
+        var parent = el.parent;
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn(
+            "Do not use v-for index as key on <transition-group> children, " +
+            "this is the same as not using keys.",
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          );
+        }
+      }
     }
     el.key = exp;
   }
@@ -1410,12 +1630,15 @@ function processFor (el) {
       extend(el, res);
     } else if (process.env.NODE_ENV !== 'production') {
       warn(
-        ("Invalid v-for expression: " + exp)
+        ("Invalid v-for expression: " + exp),
+        el.rawAttrsMap['v-for']
       );
     }
   }
 }
 
+
+
 function parseFor (exp) {
   var inMatch = exp.match(forAliasRE);
   if (!inMatch) { return }
@@ -1424,7 +1647,7 @@ function parseFor (exp) {
   var alias = inMatch[1].trim().replace(stripParensRE, '');
   var iteratorMatch = alias.match(forIteratorRE);
   if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '');
+    res.alias = alias.replace(forIteratorRE, '').trim();
     res.iterator1 = iteratorMatch[1].trim();
     if (iteratorMatch[2]) {
       res.iterator2 = iteratorMatch[2].trim();
@@ -1464,7 +1687,8 @@ function processIfConditions (el, parent) {
   } else if (process.env.NODE_ENV !== 'production') {
     warn(
       "v-" + (el.elseif ? ('else-if="' + el.elseif + '"') : 'else') + " " +
-      "used on element <" + (el.tag) + "> without corresponding v-if."
+      "used on element <" + (el.tag) + "> without corresponding v-if.",
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     );
   }
 }
@@ -1478,7 +1702,8 @@ function findPrevElement (children) {
       if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
         warn(
           "text \"" + (children[i].text.trim()) + "\" between v-if and v-else(-if) " +
-          "will be ignored."
+          "will be ignored.",
+          children[i]
         );
       }
       children.pop();
@@ -1500,52 +1725,158 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  var slotScope;
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope');
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && slotScope) {
+      warn(
+        "the \"scope\" attribute for scoped slots have been deprecated and " +
+        "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
+        "can also be used on plain elements in addition to <template> to " +
+        "denote scoped slots.",
+        el.rawAttrsMap['scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+      warn(
+        "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
+        "(v-for takes higher priority). Use a wrapper <template> for the " +
+        "scoped slot to make it clearer.",
+        el.rawAttrsMap['slot-scope'],
+        true
+      );
+    }
+    el.slotScope = slotScope;
+  }
+
+  // slot="xxx"
+  var slotTarget = getBindingAttr(el, 'slot');
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']);
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
+    }
+  }
+
+  // 2.6 v-slot syntax
+  {
+    if (el.tag === 'template') {
+      // v-slot on <template>
+      var slotBinding = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (el.slotTarget || el.slotScope) {
+            warn(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn(
+              "<template v-slot> can only appear at the root level inside " +
+              "the receiving component",
+              el
+            );
+          }
+        }
+        var ref = getSlotName(slotBinding);
+        var name = ref.name;
+        var dynamic = ref.dynamic;
+        el.slotTarget = name;
+        el.slotTargetDynamic = dynamic;
+        el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
+      }
+    } else {
+      // v-slot on component, denotes default slot
+      var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);
+      if (slotBinding$1) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (!maybeComponent(el)) {
+            warn(
+              "v-slot can only be used on components or <template>.",
+              slotBinding$1
+            );
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn(
+              "Unexpected mixed usage of different slot syntaxes.",
+              el
+            );
+          }
+          if (el.scopedSlots) {
+            warn(
+              "To avoid scope ambiguity, the default slot should also use " +
+              "<template> syntax when there are other named slots.",
+              slotBinding$1
+            );
+          }
+        }
+        // add the component's children to its default slot
+        var slots = el.scopedSlots || (el.scopedSlots = {});
+        var ref$1 = getSlotName(slotBinding$1);
+        var name$1 = ref$1.name;
+        var dynamic$1 = ref$1.dynamic;
+        var slotContainer = slots[name$1] = createASTElement('template', [], el);
+        slotContainer.slotTarget = name$1;
+        slotContainer.slotTargetDynamic = dynamic$1;
+        slotContainer.children = el.children.filter(function (c) {
+          if (!c.slotScope) {
+            c.parent = slotContainer;
+            return true
+          }
+        });
+        slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken;
+        // remove children as they are returned from scopedSlots now
+        el.children = [];
+        // mark el non-plain so data gets generated
+        el.plain = false;
+      }
+    }
+  }
+}
+
+function getSlotName (binding) {
+  var name = binding.name.replace(slotRE, '');
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default';
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn(
+        "v-slot shorthand syntax requires a slot name.",
+        binding
+      );
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: ("\"" + name + "\""), dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
   if (el.tag === 'slot') {
     el.slotName = getBindingAttr(el, 'name');
     if (process.env.NODE_ENV !== 'production' && el.key) {
       warn(
         "`key` does not work on <slot> because slots are abstract outlets " +
         "and can possibly expand into multiple elements. " +
-        "Use the key on a wrapping element instead."
+        "Use the key on a wrapping element instead.",
+        getRawBindingAttr(el, 'key')
       );
     }
-  } else {
-    var slotScope;
-    if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope');
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn(
-          "the \"scope\" attribute for scoped slots have been deprecated and " +
-          "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " +
-          "can also be used on plain elements in addition to <template> to " +
-          "denote scoped slots.",
-          true
-        );
-      }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn(
-          "Ambiguous combined usage of slot-scope and v-for on <" + (el.tag) + "> " +
-          "(v-for takes higher priority). Use a wrapper <template> for the " +
-          "scoped slot to make it clearer.",
-          true
-        );
-      }
-      el.slotScope = slotScope;
-    }
-    var slotTarget = getBindingAttr(el, 'slot');
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget);
-      }
-    }
   }
 }
 
@@ -1561,7 +1892,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   var list = el.attrsList;
-  var i, l, name, rawName, value, modifiers, isProp;
+  var i, l, name, rawName, value, modifiers, syncGen, isDynamic;
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name;
     value = list[i].value;
@@ -1569,59 +1900,100 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true;
       // modifiers
-      modifiers = parseModifiers(name);
+      modifiers = parseModifiers(name.replace(dirRE, ''));
+      // support .foo shorthand syntax for the .prop modifier
       if (modifiers) {
         name = name.replace(modifierRE, '');
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
-        isProp = false;
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        if (
+          process.env.NODE_ENV !== 'production' &&
+          value.trim().length === 0
+        ) {
+          warn(
+            ("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"")
+          );
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true;
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name);
             if (name === 'innerHtml') { name = 'innerHTML'; }
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name);
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              ("update:" + (camelize(name))),
-              genAssignmentCode(value, "$event")
-            );
+            syncGen = genAssignmentCode(value, "$event");
+            if (!isDynamic) {
+              addHandler(
+                el,
+                ("update:" + (camelize(name))),
+                syncGen,
+                null,
+                false,
+                warn,
+                list[i]
+              );
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  ("update:" + (hyphenate(name))),
+                  syncGen,
+                  null,
+                  false,
+                  warn,
+                  list[i]
+                );
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                ("\"update:\"+(" + name + ")"),
+                syncGen,
+                null,
+                false,
+                warn,
+                list[i],
+                true // dynamic
+              );
+            }
           }
         }
-        // optimize literal values in component props by wrapping them
-        // in an inline watcher to avoid unnecessary re-renders
-        if (
-          !platformIsReservedTag(el.tag) &&
-          el.tag !== 'slot' &&
-          literalValueRE.test(value.trim())
-        ) {
-          value = "_a(" + (literalPropId++) + ",function(){return " + value + "})";
-        }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value);
+          addProp(el, name, value, list[i], isDynamic);
         } else {
-          addAttr(el, name, value);
+          addAttr(el, name, value, list[i], isDynamic);
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '');
-        addHandler(el, name, value, modifiers, false, warn);
+        isDynamic = dynamicArgRE.test(name);
+        if (isDynamic) {
+          name = name.slice(1, -1);
+        }
+        addHandler(el, name, value, modifiers, false, warn, list[i], isDynamic);
       } else { // normal directives
         name = name.replace(dirRE, '');
         // parse arg
         var argMatch = name.match(argRE);
         var arg = argMatch && argMatch[1];
+        isDynamic = false;
         if (arg) {
           name = name.slice(0, -(arg.length + 1));
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1);
+            isDynamic = true;
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers);
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);
         if (process.env.NODE_ENV !== 'production' && name === 'model') {
           checkForAliasModel(el, value);
         }
@@ -1635,17 +2007,18 @@ function processAttrs (el) {
             name + "=\"" + value + "\": " +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           );
         }
       }
-      addAttr(el, name, JSON.stringify(value));
+      addAttr(el, name, JSON.stringify(value), list[i]);
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true');
+        addProp(el, name, 'true', list[i]);
       }
     }
   }
@@ -1678,7 +2051,7 @@ function makeAttrsMap (attrs) {
       process.env.NODE_ENV !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn('duplicate attribute: ' + attrs[i].name);
+      warn('duplicate attribute: ' + attrs[i].name, attrs[i]);
     }
     map[attrs[i].name] = attrs[i].value;
   }
@@ -1725,7 +2098,8 @@ function checkForAliasModel (el, value) {
         "You are binding v-model directly to a v-for iteration alias. " +
         "This will not be able to modify the v-for source array because " +
         "writing to the alias is like modifying a function local variable. " +
-        "Consider using an array of objects and use v-model on an object property instead."
+        "Consider using an array of objects and use v-model on an object property instead.",
+        el.rawAttrsMap['v-model']
       );
     }
     _el = _el.parent;
@@ -1762,7 +2136,7 @@ function optimize (root, options) {
 
 function genStaticKeys$1 (keys) {
   return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
     (keys ? ',' + keys : '')
   )
 }
@@ -1861,10 +2235,11 @@ function isDirectChildOfTemplateFor (node) {
 
 /*  */
 
-var fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/;
-var simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/;
+var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
+var fnInvokeRE = /\([^)]*?\);*$/;
+var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/;
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 var keyCodes = {
   esc: 27,
   tab: 9,
@@ -1877,6 +2252,23 @@ var keyCodes = {
   'delete': [8, 46]
 };
 
+// KeyboardEvent.key aliases
+var keyNames = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+};
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -1897,14 +2289,25 @@ var modifierCode = {
 
 function genHandlers (
   events,
-  isNative,
-  warn
+  isNative
 ) {
-  var res = isNative ? 'nativeOn:{' : 'on:{';
+  var prefix = isNative ? 'nativeOn:' : 'on:';
+  var staticHandlers = "";
+  var dynamicHandlers = "";
   for (var name in events) {
-    res += "\"" + name + "\":" + (genHandler(name, events[name])) + ",";
+    var handlerCode = genHandler(events[name]);
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += name + "," + handlerCode + ",";
+    } else {
+      staticHandlers += "\"" + name + "\":" + handlerCode + ",";
+    }
+  }
+  staticHandlers = "{" + (staticHandlers.slice(0, -1)) + "}";
+  if (dynamicHandlers) {
+    return prefix + "_d(" + staticHandlers + ",[" + (dynamicHandlers.slice(0, -1)) + "])"
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
 // Generate handler code with binding params on Weex
@@ -1925,30 +2328,28 @@ function genWeexHandler (params, handlerCode) {
     '}'
 }
 
-function genHandler (
-  name,
-  handler
-) {
+function genHandler (handler) {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return ("[" + (handler.map(function (handler) { return genHandler(name, handler); }).join(',')) + "]")
+    return ("[" + (handler.map(function (handler) { return genHandler(handler); }).join(',')) + "]")
   }
 
   var isMethodPath = simplePathRE.test(handler.value);
   var isFunctionExpression = fnExpRE.test(handler.value);
+  var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));
 
   if (!handler.modifiers) {
     if (isMethodPath || isFunctionExpression) {
       return handler.value
     }
     /* istanbul ignore if */
-    if (true && handler.params) {
+    if (handler.params) {
       return genWeexHandler(handler.params, handler.value)
     }
-    return ("function($event){" + (handler.value) + "}") // inline statement
+    return ("function($event){" + (isFunctionInvocation ? ("return " + (handler.value)) : handler.value) + "}") // inline statement
   } else {
     var code = '';
     var genModifierCode = '';
@@ -1980,12 +2381,14 @@ function genHandler (
       code += genModifierCode;
     }
     var handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? ("return " + (handler.value) + "($event)")
       : isFunctionExpression
-        ? ("(" + (handler.value) + ")($event)")
-        : handler.value;
+        ? ("return (" + (handler.value) + ")($event)")
+        : isFunctionInvocation
+          ? ("return " + (handler.value))
+          : handler.value;
     /* istanbul ignore if */
-    if (true && handler.params) {
+    if (handler.params) {
       return genWeexHandler(handler.params, code + handlerCode)
     }
     return ("function($event){" + code + handlerCode + "}")
@@ -1993,7 +2396,13 @@ function genHandler (
 }
 
 function genKeyFilter (keys) {
-  return ("if(!('button' in $event)&&" + (keys.map(genFilterCode).join('&&')) + ")return null;")
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    "if(!$event.type.indexOf('key')&&" +
+    (keys.map(genFilterCode).join('&&')) + ")return null;"
+  )
 }
 
 function genFilterCode (key) {
@@ -2001,34 +2410,18 @@ function genFilterCode (key) {
   if (keyVal) {
     return ("$event.keyCode!==" + keyVal)
   }
-  var code = keyCodes[key];
+  var keyCode = keyCodes[key];
+  var keyName = keyNames[key];
   return (
     "_k($event.keyCode," +
     (JSON.stringify(key)) + "," +
-    (JSON.stringify(code)) + "," +
-    "$event.key)"
+    (JSON.stringify(keyCode)) + "," +
+    "$event.key," +
+    "" + (JSON.stringify(keyName)) +
+    ")"
   )
 }
 
-/*  */
-
-/**
- * Check if a string starts with $ or _
- */
-
-
-/**
- * Define a property.
- */
-function def (obj, key, val, enumerable) {
-  Object.defineProperty(obj, key, {
-    value: val,
-    enumerable: !!enumerable,
-    writable: true,
-    configurable: true
-  });
-}
-
 var ASSET_TYPES = [
   'component',
   'directive',
@@ -2046,11 +2439,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -2133,6 +2529,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -2156,9 +2558,7 @@ if (process.env.NODE_ENV !== 'production') {
   warn$1 = function (msg, vm) {
     var trace = vm ? generateComponentTrace(vm) : '';
 
-    if (config.warnHandler) {
-      config.warnHandler.call(null, msg, vm, trace);
-    } else if (hasConsole && (!config.silent)) {
+    if (hasConsole && (!config.silent)) {
       console.error(("[Vue warn]: " + msg + trace));
     }
   };
@@ -2179,7 +2579,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -2235,7 +2635,6 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
 var uid = 0;
 
 /**
@@ -2264,14 +2663,20 @@ Dep.prototype.depend = function depend () {
 Dep.prototype.notify = function notify () {
   // stabilize the subscriber list first
   var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
   for (var i = 0, l = subs.length; i < l; i++) {
     subs[i].update();
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 
 /*  */
@@ -2321,22 +2726,15 @@ prototypeAccessors.child.get = function () {
 
 Object.defineProperties( VNode.prototype, prototypeAccessors );
 
-
-
-
-
-// optimized shallow clone
-// used for static nodes and slot nodes because they may be reused across
-// multiple renders, cloning them avoids errors when DOM manipulations rely
-// on their elm reference.
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -2344,7 +2742,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -2375,20 +2778,16 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -2396,10 +2795,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -2407,14 +2807,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -2430,17 +2830,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -2464,7 +2864,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -2481,7 +2881,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -2498,6 +2898,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -2526,6 +2929,8 @@ function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -2543,6 +2948,11 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn$1(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -2564,16 +2974,11 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
 
-/**
- * Delete a property and trigger change if necessary.
- */
-
-
 /**
  * Collect dependencies on array elements when the array is touched, since
  * we cannot intercept array element access like property getters.
@@ -2618,14 +3023,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -2706,13 +3121,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -2813,8 +3241,6 @@ var defaultStrat = function (parentVal, childVal) {
     : childVal
 };
 
-
-
 function assertObjectType (name, value, vm) {
   if (!isPlainObject(value)) {
     warn$1(
@@ -2825,26 +3251,14 @@ function assertObjectType (name, value, vm) {
   }
 }
 
-/**
- * Merge two option objects into a new one.
- * Core utility used in both instantiation and inheritance.
- */
-
-
-/**
- * Resolve an asset.
- * This function is used because child instances need access
- * to assets defined in its ancestor chain.
- */
-
 /*  */
 
 /*  */
 
 /*  */
-/* globals MessageChannel */
 
 var callbacks = [];
+
 function flushCallbacks () {
   var copies = callbacks.slice(0);
   callbacks.length = 0;
@@ -2853,39 +3267,28 @@ function flushCallbacks () {
   }
 }
 
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  channel.port1.onmessage = flushCallbacks;
-  
-} else {
-  /* istanbul ignore next */
-  
-}
-
-// Determine MicroTask defer implementation.
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
-if (typeof Promise !== 'undefined' && isNative(Promise)) {
-  
-} else {
-  // fallback to macro
-  
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
+if (typeof Promise !== 'undefined' && isNative(Promise)) ; else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) ;
 
 /*  */
 
@@ -2916,6 +3319,10 @@ var baseDirectives = {
 
 /*  */
 
+
+
+
+
 var CodegenState = function CodegenState (options) {
   this.options = options;
   this.warn = options.warn || baseWarn;
@@ -2923,9 +3330,10 @@ var CodegenState = function CodegenState (options) {
   this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
   this.directives = extend(extend({}, baseDirectives), options.directives);
   var isReservedTag = options.isReservedTag || no;
-  this.maybeComponent = function (el) { return !isReservedTag(el.tag); };
+  this.maybeComponent = function (el) { return !!el.component || !isReservedTag(el.tag); };
   this.onceId = 0;
   this.staticRenderFns = [];
+  this.pre = false;
 };
 
 
@@ -2943,6 +3351,10 @@ function generate (
 }
 
 function genElement (el, state) {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre;
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -2951,7 +3363,7 @@ function genElement (el, state) {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -2961,7 +3373,10 @@ function genElement (el, state) {
     if (el.component) {
       code = genComponent(el.component, el, state);
     } else {
-      var data = el.plain ? undefined : genData(el, state);
+      var data;
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData(el, state);
+      }
 
       var children = el.inlineTemplate ? null : genChildren(el, state, true);
       code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
@@ -2977,7 +3392,15 @@ function genElement (el, state) {
 // hoist static sub-trees out
 function genStatic (el, state) {
   el.staticProcessed = true;
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  var originalPreState = state.pre;
+  if (el.pre) {
+    state.pre = el.pre;
+  }
   state.staticRenderFns.push(("with(this){return " + (genElement(el, state)) + "}"));
+  state.pre = originalPreState;
   return ("_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")")
 }
 
@@ -2998,7 +3421,8 @@ function genOnce (el, state) {
     }
     if (!key) {
       process.env.NODE_ENV !== 'production' && state.warn(
-        "v-once can only be used inside v-for that is keyed. "
+        "v-once can only be used inside v-for that is keyed. ",
+        el.rawAttrsMap['v-once']
       );
       return genElement(el, state)
     }
@@ -3065,7 +3489,8 @@ function genFor (
     state.warn(
       "<" + (el.tag) + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " +
       "v-for should have explicit keys. " +
-      "See https://vuejs.org/guide/list.html#key for more info.",
+      "See https://v2.vuejs.org/v2/guide/list.html#Maintaining-State for more info.",
+      el.rawAttrsMap['v-for'],
       true /* tip */
     );
   }
@@ -3110,18 +3535,18 @@ function genData (el, state) {
   }
   // attributes
   if (el.attrs) {
-    data += "attrs:{" + (genProps(el.attrs)) + "},";
+    data += "attrs:" + (genProps(el.attrs)) + ",";
   }
   // DOM props
   if (el.props) {
-    data += "domProps:{" + (genProps(el.props)) + "},";
+    data += "domProps:" + (genProps(el.props)) + ",";
   }
   // event handlers
   if (el.events) {
-    data += (genHandlers(el.events, false, state.warn)) + ",";
+    data += (genHandlers(el.events, false)) + ",";
   }
   if (el.nativeEvents) {
-    data += (genHandlers(el.nativeEvents, true, state.warn)) + ",";
+    data += (genHandlers(el.nativeEvents, true)) + ",";
   }
   // slot target
   // only for non-scoped slots
@@ -3130,7 +3555,7 @@ function genData (el, state) {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += (genScopedSlots(el.scopedSlots, state)) + ",";
+    data += (genScopedSlots(el, el.scopedSlots, state)) + ",";
   }
   // component v-model
   if (el.model) {
@@ -3144,6 +3569,12 @@ function genData (el, state) {
     }
   }
   data = data.replace(/,$/, '') + '}';
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = "_b(" + data + ",\"" + (el.tag) + "\"," + (genProps(el.dynamicAttrs)) + ")";
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data);
@@ -3172,7 +3603,7 @@ function genDirectives (el, state) {
     }
     if (needRuntime) {
       hasRuntime = true;
-      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:\"" + (dir.arg) + "\"") : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
+      res += "{name:\"" + (dir.name) + "\",rawName:\"" + (dir.rawName) + "\"" + (dir.value ? (",value:(" + (dir.value) + "),expression:" + (JSON.stringify(dir.value))) : '') + (dir.arg ? (",arg:" + (dir.isDynamicArg ? dir.arg : ("\"" + (dir.arg) + "\""))) : '') + (dir.modifiers ? (",modifiers:" + (JSON.stringify(dir.modifiers))) : '') + "},";
     }
   }
   if (hasRuntime) {
@@ -3185,54 +3616,113 @@ function genInlineTemplate (el, state) {
   if (process.env.NODE_ENV !== 'production' && (
     el.children.length !== 1 || ast.type !== 1
   )) {
-    state.warn('Inline-template components must have exactly one child element.');
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    );
   }
-  if (ast.type === 1) {
+  if (ast && ast.type === 1) {
     var inlineRenderFns = generate(ast, state.options);
     return ("inlineTemplate:{render:function(){" + (inlineRenderFns.render) + "},staticRenderFns:[" + (inlineRenderFns.staticRenderFns.map(function (code) { return ("function(){" + code + "}"); }).join(',')) + "]}")
   }
 }
 
 function genScopedSlots (
+  el,
   slots,
   state
 ) {
-  return ("scopedSlots:_u([" + (Object.keys(slots).map(function (key) {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')) + "])")
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
+    var slot = slots[key];
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  });
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  var needsKey = !!el.if;
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    var parent = el.parent;
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true;
+        break
+      }
+      if (parent.if) {
+        needsKey = true;
+      }
+      parent = parent.parent;
+    }
+  }
+
+  var generatedSlots = Object.keys(slots)
+    .map(function (key) { return genScopedSlot(slots[key], state); })
+    .join(',');
+
+  return ("scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? (",null,false," + (hash(generatedSlots))) : "") + ")")
+}
+
+function hash(str) {
+  var hash = 5381;
+  var i = str.length;
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i);
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el) {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key,
   el,
   state
 ) {
+  var isLegacySyntax = el.attrsMap['slot-scope'];
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, "null")
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  var fn = "function(" + (String(el.slotScope)) + "){" +
+  var slotScope = el.slotScope === emptySlotScopeToken
+    ? ""
+    : String(el.slotScope);
+  var fn = "function(" + slotScope + "){" +
     "return " + (el.tag === 'template'
-      ? el.if
-        ? ((el.if) + "?" + (genChildren(el, state) || 'undefined') + ":undefined")
+      ? el.if && isLegacySyntax
+        ? ("(" + (el.if) + ")?" + (genChildren(el, state) || 'undefined') + ":undefined")
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)) + "}";
-  return ("{key:" + key + ",fn:" + fn + "}")
-}
-
-function genForScopedSlot (
-  key,
-  el,
-  state
-) {
-  var exp = el.for;
-  var alias = el.alias;
-  var iterator1 = el.iterator1 ? ("," + (el.iterator1)) : '';
-  var iterator2 = el.iterator2 ? ("," + (el.iterator2)) : '';
-  el.forProcessed = true; // avoid recursion
-  return "_l((" + exp + ")," +
-    "function(" + alias + iterator1 + iterator2 + "){" +
-      "return " + (genScopedSlot(key, el, state)) +
-    '})'
+  // reverse proxy v-slot without scope on this.$slots
+  var reverseProxy = slotScope ? "" : ",proxy:true";
+  return ("{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}")
 }
 
 function genChildren (
@@ -3251,13 +3741,16 @@ function genChildren (
       el$1.tag !== 'template' &&
       el$1.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el$1, state)
+      var normalizationType = checkSkip
+        ? state.maybeComponent(el$1) ? ",1" : ",0"
+        : "";
+      return ("" + ((altGenElement || genElement)(el$1, state)) + normalizationType)
     }
-    var normalizationType = checkSkip
+    var normalizationType$1 = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
       : 0;
     var gen = altGenNode || genNode;
-    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType ? ("," + normalizationType) : ''))
+    return ("[" + (children.map(function (c) { return gen(c, state); }).join(',')) + "]" + (normalizationType$1 ? ("," + normalizationType$1) : ''))
   }
 }
 
@@ -3295,7 +3788,7 @@ function needsNormalization (el) {
 function genNode (node, state) {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -3316,7 +3809,14 @@ function genSlot (el, state) {
   var slotName = el.slotName || '"default"';
   var children = genChildren(el, state);
   var res = "_t(" + slotName + (children ? ("," + children) : '');
-  var attrs = el.attrs && ("{" + (el.attrs.map(function (a) { return ((camelize(a.name)) + ":" + (a.value)); }).join(',')) + "}");
+  var attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) { return ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      }); }))
+    : null;
   var bind$$1 = el.attrsMap['v-bind'];
   if ((attrs || bind$$1) && !children) {
     res += ",null";
@@ -3341,15 +3841,23 @@ function genComponent (
 }
 
 function genProps (props) {
-  var res = '';
+  var staticProps = "";
+  var dynamicProps = "";
   for (var i = 0; i < props.length; i++) {
     var prop = props[i];
-    /* istanbul ignore if */
-    {
-      res += "\"" + (prop.name) + "\":" + (generateValue(prop.value)) + ",";
+    var value = generateValue(prop.value);
+    if (prop.dynamic) {
+      dynamicProps += (prop.name) + "," + value + ",";
+    } else {
+      staticProps += "\"" + (prop.name) + "\":" + value + ",";
     }
   }
-  return res.slice(0, -1)
+  staticProps = "{" + (staticProps.slice(0, -1)) + "}";
+  if (dynamicProps) {
+    return ("_d(" + staticProps + ",[" + (dynamicProps.slice(0, -1)) + "])")
+  } else {
+    return staticProps
+  }
 }
 
 /* istanbul ignore next */
@@ -3369,6 +3877,8 @@ function transformSpecialNewlines (text) {
 
 /*  */
 
+
+
 // these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 var prohibitedKeywordRE = new RegExp('\\b' + (
@@ -3386,96 +3896,170 @@ var unaryOperatorsRE = new RegExp('\\b' + (
 var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g;
 
 // detect problematic expressions in a template
-function detectErrors (ast) {
-  var errors = [];
+function detectErrors (ast, warn$$1) {
   if (ast) {
-    checkNode(ast, errors);
+    checkNode(ast, warn$$1);
   }
-  return errors
 }
 
-function checkNode (node, errors) {
+function checkNode (node, warn$$1) {
   if (node.type === 1) {
     for (var name in node.attrsMap) {
       if (dirRE.test(name)) {
         var value = node.attrsMap[name];
         if (value) {
+          var range = node.rawAttrsMap[name];
           if (name === 'v-for') {
-            checkFor(node, ("v-for=\"" + value + "\""), errors);
+            checkFor(node, ("v-for=\"" + value + "\""), warn$$1, range);
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, (name + "=\"" + value + "\""), warn$$1, range);
           } else if (onRE.test(name)) {
-            checkEvent(value, (name + "=\"" + value + "\""), errors);
+            checkEvent(value, (name + "=\"" + value + "\""), warn$$1, range);
           } else {
-            checkExpression(value, (name + "=\"" + value + "\""), errors);
+            checkExpression(value, (name + "=\"" + value + "\""), warn$$1, range);
           }
         }
       }
     }
     if (node.children) {
       for (var i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors);
+        checkNode(node.children[i], warn$$1);
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors);
+    checkExpression(node.expression, node.text, warn$$1, node);
   }
 }
 
-function checkEvent (exp, text, errors) {
-  var stipped = exp.replace(stripStringRE, '');
-  var keywordMatch = stipped.match(unaryOperatorsRE);
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp, text, warn$$1, range) {
+  var stripped = exp.replace(stripStringRE, '');
+  var keywordMatch = stripped.match(unaryOperatorsRE);
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn$$1(
       "avoid using JavaScript unary operator as property name: " +
-      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim())
+      "\"" + (keywordMatch[0]) + "\" in expression " + (text.trim()),
+      range
     );
   }
-  checkExpression(exp, text, errors);
+  checkExpression(exp, text, warn$$1, range);
 }
 
-function checkFor (node, text, errors) {
-  checkExpression(node.for || '', text, errors);
-  checkIdentifier(node.alias, 'v-for alias', text, errors);
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors);
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors);
+function checkFor (node, text, warn$$1, range) {
+  checkExpression(node.for || '', text, warn$$1, range);
+  checkIdentifier(node.alias, 'v-for alias', text, warn$$1, range);
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn$$1, range);
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn$$1, range);
 }
 
 function checkIdentifier (
   ident,
   type,
   text,
-  errors
+  warn$$1,
+  range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(("var " + ident + "=_"));
     } catch (e) {
-      errors.push(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())));
+      warn$$1(("invalid " + type + " \"" + ident + "\" in expression: " + (text.trim())), range);
     }
   }
 }
 
-function checkExpression (exp, text, errors) {
+function checkExpression (exp, text, warn$$1, range) {
   try {
     new Function(("return " + exp));
   } catch (e) {
     var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);
     if (keywordMatch) {
-      errors.push(
+      warn$$1(
         "avoid using JavaScript keyword as property name: " +
-        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim())
+        "\"" + (keywordMatch[0]) + "\"\n  Raw expression: " + (text.trim()),
+        range
       );
     } else {
-      errors.push(
+      warn$$1(
         "invalid expression: " + (e.message) + " in\n\n" +
         "    " + exp + "\n\n" +
-        "  Raw expression: " + (text.trim()) + "\n"
+        "  Raw expression: " + (text.trim()) + "\n",
+        range
       );
     }
   }
 }
 
+function checkFunctionParameterExpression (exp, text, warn$$1, range) {
+  try {
+    new Function(exp, '');
+  } catch (e) {
+    warn$$1(
+      "invalid function parameter expression: " + (e.message) + " in\n\n" +
+      "    " + exp + "\n\n" +
+      "  Raw expression: " + (text.trim()) + "\n",
+      range
+    );
+  }
+}
+
+/*  */
+
+var range = 2;
+
+function generateCodeFrame (
+  source,
+  start,
+  end
+) {
+  if ( start === void 0 ) start = 0;
+  if ( end === void 0 ) end = source.length;
+
+  var lines = source.split(/\r?\n/);
+  var count = 0;
+  var res = [];
+  for (var i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1;
+    if (count >= start) {
+      for (var j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) { continue }
+        res.push(("" + (j + 1) + (repeat$1(" ", 3 - String(j + 1).length)) + "|  " + (lines[j])));
+        var lineLength = lines[j].length;
+        if (j === i) {
+          // push underline
+          var pad = start - (count - lineLength) + 1;
+          var length = end > count ? lineLength - pad : end - start;
+          res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
+        } else if (j > i) {
+          if (end > count) {
+            var length$1 = Math.min(end - count, lineLength);
+            res.push("   |  " + repeat$1("^", length$1));
+          }
+          count += lineLength + 1;
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat$1 (str, n) {
+  var result = '';
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) { result += str; }
+      n >>>= 1;
+      if (n <= 0) { break }
+      str += str;
+    }
+  }
+  return result
+}
+
 /*  */
 
+
+
 function createFunction (code, errors) {
   try {
     return new Function(code)
@@ -3529,14 +4113,28 @@ function createCompileToFunctionFn (compile) {
     // check compilation errors/tips
     if (process.env.NODE_ENV !== 'production') {
       if (compiled.errors && compiled.errors.length) {
-        warn$$1(
-          "Error compiling template:\n\n" + template + "\n\n" +
-          compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
-          vm
-        );
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(function (e) {
+            warn$$1(
+              "Error compiling template:\n\n" + (e.msg) + "\n\n" +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            );
+          });
+        } else {
+          warn$$1(
+            "Error compiling template:\n\n" + template + "\n\n" +
+            compiled.errors.map(function (e) { return ("- " + e); }).join('\n') + '\n',
+            vm
+          );
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(function (e) { return tip(e.msg, vm); });
+        } else {
+          compiled.tips.forEach(function (msg) { return tip(msg, vm); });
+        }
       }
     }
 
@@ -3582,11 +4180,29 @@ function createCompilerCreator (baseCompile) {
       var finalOptions = Object.create(baseOptions);
       var errors = [];
       var tips = [];
-      finalOptions.warn = function (msg, tip) {
+
+      var warn = function (msg, range, tip) {
         (tip ? tips : errors).push(msg);
       };
 
       if (options) {
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          // $flow-disable-line
+          var leadingSpaceLength = template.match(/^\s*/)[0].length;
+
+          warn = function (msg, range, tip) {
+            var data = { msg: msg };
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength;
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength;
+              }
+            }
+            (tip ? tips : errors).push(data);
+          };
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -3607,9 +4223,11 @@ function createCompilerCreator (baseCompile) {
         }
       }
 
-      var compiled = baseCompile(template, finalOptions);
+      finalOptions.warn = warn;
+
+      var compiled = baseCompile(template.trim(), finalOptions);
       if (process.env.NODE_ENV !== 'production') {
-        errors.push.apply(errors, detectErrors(compiled.ast));
+        detectErrors(compiled.ast, warn);
       }
       compiled.errors = errors;
       compiled.tips = tips;
@@ -3646,6 +4264,8 @@ var createCompiler = createCompilerCreator(function baseCompile (
 
 /*  */
 
+
+
 function transformNode (el, options) {
   var warn = options.warn || baseWarn;
   var staticClass = getAndRemoveAttr(el, 'class');
@@ -3656,7 +4276,8 @@ function transformNode (el, options) {
     warn(
       "class=\"" + staticClass + "\": " +
       'Interpolation inside attributes has been deprecated. ' +
-      'Use v-bind or the colon shorthand instead.'
+      'Use v-bind or the colon shorthand instead.',
+      el.rawAttrsMap['class']
     );
   }
   if (!dynamic && classResult) {
@@ -3710,6 +4331,8 @@ var klass = {
 
 /*  */
 
+
+
 var normalize = cached(camelize);
 
 function transformNode$1 (el, options) {
@@ -3722,16 +4345,19 @@ function transformNode$1 (el, options) {
     warn(
       "style=\"" + (String(staticStyle)) + "\": " +
       'Interpolation inside attributes has been deprecated. ' +
-      'Use v-bind or the colon shorthand instead.'
+      'Use v-bind or the colon shorthand instead.',
+      el.rawAttrsMap['style']
     );
   }
   if (!dynamic && styleResult) {
+    // $flow-disable-line
     el.staticStyle = styleResult;
   }
   var styleBinding = getBindingAttr(el, 'style', false /* getStatic */);
   if (styleBinding) {
     el.styleBinding = styleBinding;
   } else if (dynamic) {
+    // $flow-disable-line
     el.styleBinding = styleResult;
   }
 }
@@ -3752,7 +4378,7 @@ function parseStaticStyle (staticStyle, options) {
   // "width: 200px; height: {{y}}" -> {width: 200, height: y}
   var dynamic = false;
   var styleResult = '';
-  if (staticStyle) {
+  if (typeof staticStyle === 'string') {
     var styleList = staticStyle.trim().split(';').map(function (style) {
       var result = style.trim().split(':');
       if (result.length !== 2) {
@@ -3770,6 +4396,8 @@ function parseStaticStyle (staticStyle, options) {
     if (styleList.length) {
       styleResult = '{' + styleList.join(',') + '}';
     }
+  } else if (isPlainObject(staticStyle)) {
+    styleResult = JSON.stringify(staticStyle) || '';
   }
   return { dynamic: dynamic, styleResult: styleResult }
 }
@@ -3793,7 +4421,7 @@ function normalizeKeyName (str) {
   return normalize$1(str)
 }
 
-function transformNode$2 (el, options) {
+function transformNode$2 (el) {
   if (Array.isArray(el.attrsList)) {
     el.attrsList.forEach(function (attr) {
       if (attr.name && attr.name.match(/\-/)) {
@@ -3802,6 +4430,11 @@ function transformNode$2 (el, options) {
           el.attrsMap[realName] = el.attrsMap[attr.name];
           delete el.attrsMap[attr.name];
         }
+        if (el.rawAttrsMap && el.rawAttrsMap[attr.name]) {
+          el.rawAttrsMap[realName] = el.rawAttrsMap[attr.name];
+          // $flow-disable-line
+          delete el.rawAttrsMap[attr.name];
+        }
         attr.name = realName;
       }
     });
@@ -3817,7 +4450,7 @@ var props = {
 // must be sent to the native together.
 var isUnitaryTag = makeMap('cell,header,cell-slot,recycle-list', true);
 
-function preTransformNode (el, options) {
+function preTransformNode (el) {
   if (isUnitaryTag(el.tag) && !el.attrsList.some(function (item) { return item.name === 'append'; })) {
     el.attrsMap.append = 'tree';
     el.attrsList.push({ name: 'append', value: 'tree' });
@@ -3839,14 +4472,55 @@ var append = {
 
 /*  */
 
+/**
+ * Map the following syntax to corresponding attrs:
+ *
+ * <recycle-list for="(item, i) in longList" switch="cellType">
+ *   <cell-slot case="A"> ... </cell-slot>
+ *   <cell-slot case="B"> ... </cell-slot>
+ * </recycle-list>
+ */
+
+function preTransformRecycleList (
+  el,
+  options
+) {
+  var exp = getAndRemoveAttr(el, 'for');
+  if (!exp) {
+    if (options.warn) {
+      options.warn("Invalid <recycle-list> syntax: missing \"for\" expression.");
+    }
+    return
+  }
+
+  var res = parseFor(exp);
+  if (!res) {
+    if (options.warn) {
+      options.warn(("Invalid <recycle-list> syntax: " + exp + "."));
+    }
+    return
+  }
 
-var RECYCLE_LIST_MARKER = '@inRecycleList';
+  addRawAttr(el, ':list-data', res.for);
+  addRawAttr(el, 'binding-expression', res.for);
+  addRawAttr(el, 'alias', res.alias);
+  if (res.iterator2) {
+    // (item, key, index) for object iteration
+    // is this even supported?
+    addRawAttr(el, 'index', res.iterator2);
+  } else if (res.iterator1) {
+    addRawAttr(el, 'index', res.iterator1);
+  }
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
+  var switchKey = getAndRemoveAttr(el, 'switch');
+  if (switchKey) {
+    addRawAttr(el, 'switch', switchKey);
+  }
+}
 
+/*  */
 
-// Updates the state of the component to weex native render engine.
+var RECYCLE_LIST_MARKER = '@inRecycleList';
 
 /*  */
 
@@ -3865,13 +4539,11 @@ function postTransformComponent (
 /*  */
 
 // mark component root nodes as
-function postTransformComponentRoot (
-  el,
-  options
-) {
+function postTransformComponentRoot (el) {
   if (!el.parent) {
     // component root
     addAttr(el, '@isComponentRoot', 'true');
+    addAttr(el, '@templateId', '_uid');
     addAttr(el, '@componentProps', '$props || {}');
   }
 }
@@ -3889,7 +4561,7 @@ function genText$1 (node) {
   return JSON.stringify(value)
 }
 
-function postTransformText (el, options) {
+function postTransformText (el) {
   // weex <text> can only contain text, so the parser
   // always generates a single child.
   if (el.children.length) {
@@ -3900,17 +4572,76 @@ function postTransformText (el, options) {
 
 /*  */
 
+// import { warn } from 'core/util/index'
+
+// this will be preserved during build
+// $flow-disable-line
+var acorn = require('acorn'); // $flow-disable-line
+var walk = require('acorn/dist/walk'); // $flow-disable-line
+var escodegen = require('escodegen');
+
+function nodeToBinding (node) {
+  switch (node.type) {
+    case 'Literal': return node.value
+    case 'Identifier':
+    case 'UnaryExpression':
+    case 'BinaryExpression':
+    case 'LogicalExpression':
+    case 'ConditionalExpression':
+    case 'MemberExpression': return { '@binding': escodegen.generate(node) }
+    case 'ArrayExpression': return node.elements.map(function (_) { return nodeToBinding(_); })
+    case 'ObjectExpression': {
+      var object = {};
+      node.properties.forEach(function (prop) {
+        if (!prop.key || prop.key.type !== 'Identifier') {
+          return
+        }
+        var key = escodegen.generate(prop.key);
+        var value = nodeToBinding(prop.value);
+        if (key && value) {
+          object[key] = value;
+        }
+      });
+      return object
+    }
+    default: {
+      // warn(`Not support ${node.type}: "${escodegen.generate(node)}"`)
+      return ''
+    }
+  }
+}
+
+function generateBinding (exp) {
+  if (exp && typeof exp === 'string') {
+    var ast = null;
+    try {
+      ast = acorn.parse(("(" + exp + ")"));
+    } catch (e) {
+      // warn(`Failed to parse the expression: "${exp}"`)
+      return ''
+    }
+
+    var output = '';
+    walk.simple(ast, {
+      Expression: function Expression (node) {
+        output = nodeToBinding(node);
+      }
+    });
+    return output
+  }
+}
+
+/*  */
+
 function parseAttrName (name) {
   return camelize(name.replace(bindRE, ''))
 }
 
-function preTransformVBind (el, options) {
+function preTransformVBind (el) {
   for (var attr in el.attrsMap) {
     if (bindRE.test(attr)) {
       var name = parseAttrName(attr);
-      var value = {
-        '@binding': getAndRemoveAttr(el, attr)
-      };
+      var value = generateBinding(getAndRemoveAttr(el, attr));
       delete el.attrsMap[attr];
       addRawAttr(el, name, value);
     }
@@ -3928,11 +4659,23 @@ function hasConditionDirective (el) {
   return false
 }
 
-function getPrevMatch (el) {
+function getPreviousConditions (el) {
+  var conditions = [];
   if (el.parent && el.parent.children) {
-    var prev = el.parent.children[el.parent.children.length - 1];
-    return prev.attrsMap['[[match]]']
+    for (var c = 0, n = el.parent.children.length; c < n; ++c) {
+      // $flow-disable-line
+      var ifConditions = el.parent.children[c].ifConditions;
+      if (ifConditions) {
+        for (var i = 0, l = ifConditions.length; i < l; ++i) {
+          var condition = ifConditions[i];
+          if (condition && condition.exp) {
+            conditions.push(condition.exp);
+          }
+        }
+      }
+    }
   }
+  return conditions
 }
 
 function preTransformVIf (el, options) {
@@ -3945,9 +4688,12 @@ function preTransformVIf (el, options) {
     getAndRemoveAttr(el, 'v-else', true);
     if (ifExp) {
       exp = ifExp;
+      addIfCondition(el, { exp: ifExp, block: el });
     } else {
-      var prevMatch = getPrevMatch(el);
-      if (prevMatch) {
+      elseifExp && addIfCondition(el, { exp: elseifExp, block: el });
+      var prevConditions = getPreviousConditions(el);
+      if (prevConditions.length) {
+        var prevMatch = prevConditions.join(' || ');
         exp = elseifExp
           ? ("!(" + prevMatch + ") && (" + elseifExp + ")") // v-else-if
           : ("!(" + prevMatch + ")"); // v-else
@@ -4005,7 +4751,7 @@ function parseHandlerParams (handler) {
   }
 }
 
-function postTransformVOn (el, options) {
+function postTransformVOn (el) {
   var events = el.events;
   if (!events) {
     return
@@ -4022,6 +4768,24 @@ function postTransformVOn (el, options) {
 
 /*  */
 
+function containVOnce (el) {
+  for (var attr in el.attrsMap) {
+    if (/^v\-once$/i.test(attr)) {
+      return true
+    }
+  }
+  return false
+}
+
+function preTransformVOnce (el) {
+  if (containVOnce(el)) {
+    getAndRemoveAttr(el, 'v-once', true);
+    addRawAttr(el, '[[once]]', true);
+  }
+}
+
+/*  */
+
 var currentRecycleList = null;
 
 function shouldCompile (el, options) {
@@ -4031,19 +4795,19 @@ function shouldCompile (el, options) {
 
 function preTransformNode$1 (el, options) {
   if (el.tag === 'recycle-list') {
+    preTransformRecycleList(el, options);
     currentRecycleList = el;
   }
   if (shouldCompile(el, options)) {
-    preTransformVBind(el, options);
+    preTransformVBind(el);
     preTransformVIf(el, options); // also v-else-if and v-else
     preTransformVFor(el, options);
+    preTransformVOnce(el);
   }
 }
 
 function transformNode$3 (el, options) {
-  if (shouldCompile(el, options)) {
-    // do nothing yet
-  }
+  if (shouldCompile(el, options)) ;
 }
 
 function postTransformNode (el, options) {
@@ -4051,12 +4815,12 @@ function postTransformNode (el, options) {
     // mark child component in parent template
     postTransformComponent(el, options);
     // mark root in child component template
-    postTransformComponentRoot(el, options);
+    postTransformComponentRoot(el);
     // <text>: transform children text into value attr
     if (el.tag === 'text') {
-      postTransformText(el, options);
+      postTransformText(el);
     }
-    postTransformVOn(el, options);
+    postTransformVOn(el);
   }
   if (el === currentRecycleList) {
     currentRecycleList = null;
@@ -4081,8 +4845,7 @@ var modules = [
 
 function model (
   el,
-  dir,
-  _warn
+  dir
 ) {
   if (el.tag === 'input' || el.tag === 'textarea') {
     genDefaultModel(el, dir.value, dir.modifiers);
@@ -4118,10 +4881,6 @@ var directives = {
 
 /*  */
 
-// These util functions are split into its own file because Rollup cannot drop
-// makeMap() due to potential side effects, so these variables end up
-// bloating the web builds.
-
 var isReservedTag = makeMap(
   'template,script,style,element,content,slot,link,meta,svg,view,' +
   'a,div,img,image,text,span,input,switch,textarea,spinner,select,' +
@@ -4149,11 +4908,11 @@ var isUnaryTag$1 = makeMap(
   true
 );
 
-function mustUseProp (tag, type, name) {
+function mustUseProp () {
   return false
 }
 
-function getTagNamespace (tag) { }
+function getTagNamespace () { }
 
 /*  */
 
@@ -4196,3 +4955,4 @@ function compile (
 }
 
 exports.compile = compile;
+exports.generateCodeFrame = generateCodeFrame;
diff --git a/packages/weex-vue-framework/factory.js b/packages/weex-vue-framework/factory.js
index 1c6974d4951..6fad6da8755 100644
--- a/packages/weex-vue-framework/factory.js
+++ b/packages/weex-vue-framework/factory.js
@@ -1,13 +1,15 @@
 'use strict';
 
+
+
 module.exports = function weexFactory (exports, document) {
 
 /*  */
 
 var emptyObject = Object.freeze({});
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 function isUndef (v) {
   return v === undefined || v === null
 }
@@ -25,12 +27,14 @@ function isFalse (v) {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 function isPrimitive (value) {
   return (
     typeof value === 'string' ||
     typeof value === 'number' ||
+    // $flow-disable-line
+    typeof value === 'symbol' ||
     typeof value === 'boolean'
   )
 }
@@ -45,7 +49,7 @@ function isObject (obj) {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 var _toString = Object.prototype.toString;
 
@@ -73,19 +77,27 @@ function isValidArrayIndex (val) {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+function isPromise (val) {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 function toString (val) {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 function toNumber (val) {
@@ -117,12 +129,12 @@ function makeMap (
 var isBuiltInTag = makeMap('slot,component', true);
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 function remove (arr, item) {
   if (arr.length) {
@@ -134,7 +146,7 @@ function remove (arr, item) {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 var hasOwnProperty = Object.prototype.hasOwnProperty;
 function hasOwn (obj, key) {
@@ -176,9 +188,15 @@ var hyphenate = cached(function (str) {
 });
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
-function bind (fn, ctx) {
+
+/* istanbul ignore next */
+function polyfillBind (fn, ctx) {
   function boundFn (a) {
     var l = arguments.length;
     return l
@@ -187,11 +205,19 @@ function bind (fn, ctx) {
         : fn.call(ctx, a)
       : fn.call(ctx)
   }
-  // record original fn length
+
   boundFn._length = fn.length;
   return boundFn
 }
 
+function nativeBind (fn, ctx) {
+  return fn.bind(ctx)
+}
+
+var bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind;
+
 /**
  * Convert an Array-like object to a real Array.
  */
@@ -228,10 +254,12 @@ function toObject (arr) {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 function noop (a, b, c) {}
 
@@ -240,15 +268,12 @@ function noop (a, b, c) {}
  */
 var no = function (a, b, c) { return false; };
 
-/**
- * Return same value
- */
-var identity = function (_) { return _; };
+/* eslint-enable no-unused-vars */
 
 /**
- * Generate a static keys string from compiler modules.
+ * Return the same value.
  */
-
+var identity = function (_) { return _; };
 
 /**
  * Check if two values are loosely equal - that is,
@@ -266,6 +291,8 @@ function looseEqual (a, b) {
         return a.length === b.length && a.every(function (e, i) {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         var keysA = Object.keys(a);
         var keysB = Object.keys(b);
@@ -287,6 +314,11 @@ function looseEqual (a, b) {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 function looseIndexOf (arr, val) {
   for (var i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) { return i }
@@ -326,11 +358,14 @@ var LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ];
 
 /*  */
 
+
+
 var config = ({
   /**
    * Option merge strategies (used in core/util/options)
@@ -413,6 +448,12 @@ var config = ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
@@ -421,6 +462,13 @@ var config = ({
 
 /*  */
 
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
+
 /**
  * Check if a string starts with $ or _
  */
@@ -444,7 +492,7 @@ function def (obj, key, val, enumerable) {
 /**
  * Parse simple path.
  */
-var bailRE = /[^\w.$]/;
+var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]"));
 function parsePath (path) {
   if (bailRE.test(path)) {
     return
@@ -461,7 +509,6 @@ function parsePath (path) {
 
 /*  */
 
-
 // can we use __proto__?
 var hasProto = '__proto__' in {};
 
@@ -476,18 +523,16 @@ var isEdge = UA && UA.indexOf('edge/') > 0;
 var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android');
 var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios');
 var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
+var isPhantomJS = UA && /phantomjs/.test(UA);
+var isFF = UA && UA.match(/firefox\/(\d+)/);
 
 // Firefox has a "watch" function on Object.prototype...
 var nativeWatch = ({}).watch;
-
-
 if (inBrowser) {
   try {
     var opts = {};
     Object.defineProperty(opts, 'passive', ({
       get: function get () {
-        /* istanbul ignore next */
-        
       }
     })); // https://github.com/facebook/flow/issues/285
     window.addEventListener('test-passive', null, opts);
@@ -500,10 +545,10 @@ var _isServer;
 var isServerRendering = function () {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server';
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
     } else {
       _isServer = false;
     }
@@ -530,7 +575,7 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
   _Set = Set;
 } else {
   // a non-standard Set polyfill that only works with primitive keys.
-  _Set = (function () {
+  _Set = /*@__PURE__*/(function () {
     function Set () {
       this.set = Object.create(null);
     }
@@ -588,7 +633,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {};
+        : vm;
     var name = options.name || options._componentTag;
     var file = options.__file;
     if (!name && file) {
@@ -644,15 +689,14 @@ if (process.env.NODE_ENV !== 'production') {
 
 /*  */
 
-
-var uid$1 = 0;
+var uid = 0;
 
 /**
  * A dep is an observable that can have multiple
  * directives subscribing to it.
  */
 var Dep = function Dep () {
-  this.id = uid$1++;
+  this.id = uid++;
   this.subs = [];
 };
 
@@ -673,24 +717,31 @@ Dep.prototype.depend = function depend () {
 Dep.prototype.notify = function notify () {
   // stabilize the subscriber list first
   var subs = this.subs.slice();
+  if (process.env.NODE_ENV !== 'production' && !config.async) {
+    // subs aren't sorted in scheduler if not running async
+    // we need to sort them now to make sure they fire in correct
+    // order
+    subs.sort(function (a, b) { return a.id - b.id; });
+  }
   for (var i = 0, l = subs.length; i < l; i++) {
     subs[i].update();
   }
 };
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null;
 var targetStack = [];
 
-function pushTarget (_target) {
-  if (Dep.target) { targetStack.push(Dep.target); }
-  Dep.target = _target;
+function pushTarget (target) {
+  targetStack.push(target);
+  Dep.target = target;
 }
 
 function popTarget () {
-  Dep.target = targetStack.pop();
+  targetStack.pop();
+  Dep.target = targetStack[targetStack.length - 1];
 }
 
 /*  */
@@ -757,16 +808,18 @@ function createTextVNode (val) {
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
 // on their elm reference.
-function cloneVNode (vnode, deep) {
-  var componentOptions = vnode.componentOptions;
+function cloneVNode (vnode) {
   var cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
-    componentOptions,
+    vnode.componentOptions,
     vnode.asyncFactory
   );
   cloned.ns = vnode.ns;
@@ -776,34 +829,20 @@ function cloneVNode (vnode, deep) {
   cloned.fnContext = vnode.fnContext;
   cloned.fnOptions = vnode.fnOptions;
   cloned.fnScopeId = vnode.fnScopeId;
+  cloned.asyncMeta = vnode.asyncMeta;
   cloned.isCloned = true;
-  if (deep) {
-    if (vnode.children) {
-      cloned.children = cloneVNodes(vnode.children, true);
-    }
-    if (componentOptions && componentOptions.children) {
-      componentOptions.children = cloneVNodes(componentOptions.children, true);
-    }
-  }
   return cloned
 }
 
-function cloneVNodes (vnodes, deep) {
-  var len = vnodes.length;
-  var res = new Array(len);
-  for (var i = 0; i < len; i++) {
-    res[i] = cloneVNode(vnodes[i], deep);
-  }
-  return res
-}
-
 /*
  * not type checking this file because flow doesn't play well with
  * dynamically accessing methods on Array prototype
  */
 
 var arrayProto = Array.prototype;
-var arrayMethods = Object.create(arrayProto);[
+var arrayMethods = Object.create(arrayProto);
+
+var methodsToPatch = [
   'push',
   'pop',
   'shift',
@@ -811,7 +850,12 @@ var arrayMethods = Object.create(arrayProto);[
   'splice',
   'sort',
   'reverse'
-].forEach(function (method) {
+];
+
+/**
+ * Intercept mutating methods and emit events
+ */
+methodsToPatch.forEach(function (method) {
   // cache original method
   var original = arrayProto[method];
   def(arrayMethods, method, function mutator () {
@@ -842,20 +886,20 @@ var arrayMethods = Object.create(arrayProto);[
 var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-var observerState = {
-  shouldConvert: true
-};
+var shouldObserve = true;
+
+function toggleObserving (value) {
+  shouldObserve = value;
+}
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 var Observer = function Observer (value) {
   this.value = value;
@@ -863,10 +907,11 @@ var Observer = function Observer (value) {
   this.vmCount = 0;
   def(value, '__ob__', this);
   if (Array.isArray(value)) {
-    var augment = hasProto
-      ? protoAugment
-      : copyAugment;
-    augment(value, arrayMethods, arrayKeys);
+    if (hasProto) {
+      protoAugment(value, arrayMethods);
+    } else {
+      copyAugment(value, arrayMethods, arrayKeys);
+    }
     this.observeArray(value);
   } else {
     this.walk(value);
@@ -874,14 +919,14 @@ var Observer = function Observer (value) {
 };
 
 /**
- * Walk through each property and convert them into
+ * Walk through all properties and convert them into
  * getter/setters. This method should only be called when
  * value type is Object.
  */
 Observer.prototype.walk = function walk (obj) {
   var keys = Object.keys(obj);
   for (var i = 0; i < keys.length; i++) {
-    defineReactive(obj, keys[i], obj[keys[i]]);
+    defineReactive$$1(obj, keys[i]);
   }
 };
 
@@ -897,17 +942,17 @@ Observer.prototype.observeArray = function observeArray (items) {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src, keys) {
+function protoAugment (target, src) {
   /* eslint-disable no-proto */
   target.__proto__ = src;
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -931,7 +976,7 @@ function observe (value, asRootData) {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__;
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -948,7 +993,7 @@ function observe (value, asRootData) {
 /**
  * Define a reactive property on an Object.
  */
-function defineReactive (
+function defineReactive$$1 (
   obj,
   key,
   val,
@@ -965,6 +1010,9 @@ function defineReactive (
   // cater for pre-defined getter/setters
   var getter = property && property.get;
   var setter = property && property.set;
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key];
+  }
 
   var childOb = !shallow && observe(val);
   Object.defineProperty(obj, key, {
@@ -993,6 +1041,8 @@ function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter();
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) { return }
       if (setter) {
         setter.call(obj, newVal);
       } else {
@@ -1010,6 +1060,11 @@ function defineReactive (
  * already exist.
  */
 function set (target, key, val) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key);
     target.splice(key, 1, val);
@@ -1031,7 +1086,7 @@ function set (target, key, val) {
     target[key] = val;
     return val
   }
-  defineReactive(ob.value, key, val);
+  defineReactive$$1(ob.value, key, val);
   ob.dep.notify();
   return val
 }
@@ -1040,6 +1095,11 @@ function set (target, key, val) {
  * Delete a property and trigger change if necessary.
  */
 function del (target, key) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target))));
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.splice(key, 1);
     return
@@ -1106,14 +1166,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to, from) {
   if (!from) { return to }
   var key, toVal, fromVal;
-  var keys = Object.keys(from);
+
+  var keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from);
+
   for (var i = 0; i < keys.length; i++) {
     key = keys[i];
+    // in case the object is already observed...
+    if (key === '__ob__') { continue }
     toVal = to[key];
     fromVal = from[key];
     if (!hasOwn(to, key)) {
       set(to, key, fromVal);
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal);
     }
   }
@@ -1194,13 +1264,26 @@ function mergeHook (
   parentVal,
   childVal
 ) {
-  return childVal
+  var res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
-    : parentVal
+    : parentVal;
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  var res = [];
+  for (var i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i]);
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(function (hook) {
@@ -1311,11 +1394,10 @@ function checkComponents (options) {
 }
 
 function validateComponentName (name) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+  if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) {
     warn(
       'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
+      'should conform to valid custom element name in html5 specification.'
     );
   }
   if (isBuiltInTag(name) || config.isReservedTag(name)) {
@@ -1350,9 +1432,6 @@ function normalizeProps (options, vm) {
     for (var key in props) {
       val = props[key];
       name = camelize(key);
-      if (process.env.NODE_ENV !== 'production' && isPlainObject(val)) {
-        validatePropObject(name, val, vm);
-      }
       res[name] = isPlainObject(val)
         ? val
         : { type: val };
@@ -1367,26 +1446,6 @@ function normalizeProps (options, vm) {
   options.props = res;
 }
 
-/**
- * Validate whether a prop object keys are valid.
- */
-var propOptionsRE = /^(type|default|required|validator)$/;
-
-function validatePropObject (
-  propName,
-  prop,
-  vm
-) {
-  for (var key in prop) {
-    if (!propOptionsRE.test(key)) {
-      warn(
-        ("Invalid key \"" + key + "\" in validation rules object for prop \"" + propName + "\"."),
-        vm
-      );
-    }
-  }
-}
-
 /**
  * Normalize all injections into Object-based format
  */
@@ -1421,9 +1480,9 @@ function normalizeDirectives (options) {
   var dirs = options.directives;
   if (dirs) {
     for (var key in dirs) {
-      var def = dirs[key];
-      if (typeof def === 'function') {
-        dirs[key] = { bind: def, update: def };
+      var def$$1 = dirs[key];
+      if (typeof def$$1 === 'function') {
+        dirs[key] = { bind: def$$1, update: def$$1 };
       }
     }
   }
@@ -1459,15 +1518,22 @@ function mergeOptions (
   normalizeProps(child, vm);
   normalizeInject(child, vm);
   normalizeDirectives(child);
-  var extendsFrom = child.extends;
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm);
-  }
-  if (child.mixins) {
-    for (var i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm);
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm);
+    }
+    if (child.mixins) {
+      for (var i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm);
+      }
     }
   }
+
   var options = {};
   var key;
   for (key in parent) {
@@ -1520,6 +1586,8 @@ function resolveAsset (
 
 /*  */
 
+
+
 function validateProp (
   key,
   propOptions,
@@ -1529,12 +1597,18 @@ function validateProp (
   var prop = propOptions[key];
   var absent = !hasOwn(propsData, key);
   var value = propsData[key];
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  var booleanIndex = getTypeIndex(Boolean, prop.type);
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false;
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true;
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      var stringIndex = getTypeIndex(String, prop.type);
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true;
+      }
     }
   }
   // check default value
@@ -1542,15 +1616,15 @@ function validateProp (
     value = getPropDefaultValue(vm, prop, key);
     // since the default value is a fresh copy,
     // make sure to observe it.
-    var prevShouldConvert = observerState.shouldConvert;
-    observerState.shouldConvert = true;
+    var prevShouldObserve = shouldObserve;
+    toggleObserving(true);
     observe(value);
-    observerState.shouldConvert = prevShouldConvert;
+    toggleObserving(prevShouldObserve);
   }
   if (
     process.env.NODE_ENV !== 'production' &&
     // skip validation for weex recycle-list child component props
-    !(true && isObject(value) && ('@binding' in value))
+    !(isObject(value) && ('@binding' in value))
   ) {
     assertProp(prop, key, value, vm, absent);
   }
@@ -1623,11 +1697,10 @@ function assertProp (
       valid = assertedType.valid;
     }
   }
+
   if (!valid) {
     warn(
-      "Invalid prop: type check failed for prop \"" + name + "\"." +
-      " Expected " + (expectedTypes.map(capitalize).join(', ')) +
-      ", got " + (toRawType(value)) + ".",
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     );
     return
@@ -1678,39 +1751,114 @@ function getType (fn) {
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes) {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (var i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (var i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  var message = "Invalid prop: type check failed for prop \"" + name + "\"." +
+    " Expected " + (expectedTypes.map(capitalize).join(', '));
+  var expectedType = expectedTypes[0];
+  var receivedType = toRawType(value);
+  var expectedValue = styleValue(value, expectedType);
+  var receivedValue = styleValue(value, receivedType);
+  // check if we need to specify expected value
+  if (expectedTypes.length === 1 &&
+      isExplicable(expectedType) &&
+      !isBoolean(expectedType, receivedType)) {
+    message += " with value " + expectedValue;
+  }
+  message += ", got " + receivedType + " ";
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += "with value " + receivedValue + ".";
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return ("\"" + value + "\"")
+  } else if (type === 'Number') {
+    return ("" + (Number(value)))
+  } else {
+    return ("" + value)
+  }
+}
+
+function isExplicable (value) {
+  var explicitTypes = ['string', 'number', 'boolean'];
+  return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; })
+}
+
+function isBoolean () {
+  var args = [], len = arguments.length;
+  while ( len-- ) args[ len ] = arguments[ len ];
+
+  return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; })
 }
 
 /*  */
 
 function handleError (err, vm, info) {
-  if (vm) {
-    var cur = vm;
-    while ((cur = cur.$parent)) {
-      var hooks = cur.$options.errorCaptured;
-      if (hooks) {
-        for (var i = 0; i < hooks.length; i++) {
-          try {
-            var capture = hooks[i].call(cur, err, vm, info) === false;
-            if (capture) { return }
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook');
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget();
+  try {
+    if (vm) {
+      var cur = vm;
+      while ((cur = cur.$parent)) {
+        var hooks = cur.$options.errorCaptured;
+        if (hooks) {
+          for (var i = 0; i < hooks.length; i++) {
+            try {
+              var capture = hooks[i].call(cur, err, vm, info) === false;
+              if (capture) { return }
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook');
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info);
+  } finally {
+    popTarget();
+  }
+}
+
+function invokeWithErrorHandling (
+  handler,
+  context,
+  args,
+  vm,
+  info
+) {
+  var res;
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context);
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); });
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true;
+    }
+  } catch (e) {
+    handleError(e, vm, info);
   }
-  globalHandleError(err, vm, info);
+  return res
 }
 
 function globalHandleError (err, vm, info) {
@@ -1718,7 +1866,11 @@ function globalHandleError (err, vm, info) {
     try {
       return config.errorHandler.call(null, err, vm, info)
     } catch (e) {
-      logError(e, null, 'config.errorHandler');
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler');
+      }
     }
   }
   logError(err, vm, info);
@@ -1737,7 +1889,6 @@ function logError (err, vm, info) {
 }
 
 /*  */
-/* globals MessageChannel */
 
 var callbacks = [];
 var pending = false;
@@ -1751,69 +1902,69 @@ function flushCallbacks () {
   }
 }
 
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-var microTimerFunc;
-var macroTimerFunc;
-var useMacroTask = false;
-
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = function () {
-    setImmediate(flushCallbacks);
-  };
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  var channel = new MessageChannel();
-  var port = channel.port2;
-  channel.port1.onmessage = flushCallbacks;
-  macroTimerFunc = function () {
-    port.postMessage(1);
-  };
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = function () {
-    setTimeout(flushCallbacks, 0);
-  };
-}
-
-// Determine MicroTask defer implementation.
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+var timerFunc;
+
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
 if (typeof Promise !== 'undefined' && isNative(Promise)) {
   var p = Promise.resolve();
-  microTimerFunc = function () {
+  timerFunc = function () {
     p.then(flushCallbacks);
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
     // it can get stuck in a weird state where callbacks are pushed into the
     // microtask queue but the queue isn't being flushed, until the browser
     // needs to do some other work, e.g. handle a timer. Therefore we can
     // "force" the microtask queue to be flushed by adding an empty timer.
     if (isIOS) { setTimeout(noop); }
   };
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  var counter = 1;
+  var observer = new MutationObserver(flushCallbacks);
+  var textNode = document.createTextNode(String(counter));
+  observer.observe(textNode, {
+    characterData: true
+  });
+  timerFunc = function () {
+    counter = (counter + 1) % 2;
+    textNode.data = String(counter);
+  };
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = function () {
+    setImmediate(flushCallbacks);
+  };
 } else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc;
+  // Fallback to setTimeout.
+  timerFunc = function () {
+    setTimeout(flushCallbacks, 0);
+  };
 }
 
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-
-
 function nextTick (cb, ctx) {
   var _resolve;
   callbacks.push(function () {
@@ -1829,11 +1980,7 @@ function nextTick (cb, ctx) {
   });
   if (!pending) {
     pending = true;
-    if (useMacroTask) {
-      macroTimerFunc();
-    } else {
-      microTimerFunc();
-    }
+    timerFunc();
   }
   // $flow-disable-line
   if (!cb && typeof Promise !== 'undefined') {
@@ -1863,14 +2010,23 @@ if (process.env.NODE_ENV !== 'production') {
       'referenced during render. Make sure that this property is reactive, ' +
       'either in the data option, or for class-based components, by ' +
       'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      'See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties',
+      target
+    );
+  };
+
+  var warnReservedPrefix = function (target, key) {
+    warn(
+      "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://v2.vuejs.org/v2/api/#data',
       target
     );
   };
 
   var hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/);
+    typeof Proxy !== 'undefined' && isNative(Proxy);
 
   if (hasProxy) {
     var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
@@ -1890,9 +2046,11 @@ if (process.env.NODE_ENV !== 'production') {
   var hasHandler = {
     has: function has (target, key) {
       var has = key in target;
-      var isAllowed = allowedGlobals(key) || key.charAt(0) === '_';
+      var isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data));
       if (!has && !isAllowed) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return has || !isAllowed
     }
@@ -1901,7 +2059,8 @@ if (process.env.NODE_ENV !== 'production') {
   var getHandler = {
     get: function get (target, key) {
       if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key);
+        if (key in target.$data) { warnReservedPrefix(target, key); }
+        else { warnNonPresent(target, key); }
       }
       return target[key]
     }
@@ -1938,7 +2097,7 @@ function traverse (val) {
 function _traverse (val, seen) {
   var i, keys;
   var isA = Array.isArray(val);
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
     return
   }
   if (val.__ob__) {
@@ -1976,7 +2135,7 @@ if (process.env.NODE_ENV !== 'production') {
       perf.measure(name, startTag, endTag);
       perf.clearMarks(startTag);
       perf.clearMarks(endTag);
-      perf.clearMeasures(name);
+      // perf.clearMeasures(name)
     };
   }
 }
@@ -1998,7 +2157,7 @@ var normalizeEvent = cached(function (name) {
   }
 });
 
-function createFnInvoker (fns) {
+function createFnInvoker (fns, vm) {
   function invoker () {
     var arguments$1 = arguments;
 
@@ -2006,11 +2165,11 @@ function createFnInvoker (fns) {
     if (Array.isArray(fns)) {
       var cloned = fns.slice();
       for (var i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments$1);
+        invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler")
     }
   }
   invoker.fns = fns;
@@ -2022,17 +2181,18 @@ function updateListeners (
   oldOn,
   add,
   remove$$1,
+  createOnceHandler,
   vm
 ) {
-  var name, def, cur, old, event;
+  var name, def$$1, cur, old, event;
   for (name in on) {
-    def = cur = on[name];
+    def$$1 = cur = on[name];
     old = oldOn[name];
     event = normalizeEvent(name);
     /* istanbul ignore if */
-    if (true && isPlainObject(def)) {
-      cur = def.handler;
-      event.params = def.params;
+    if (isPlainObject(def$$1)) {
+      cur = def$$1.handler;
+      event.params = def$$1.params;
     }
     if (isUndef(cur)) {
       process.env.NODE_ENV !== 'production' && warn(
@@ -2041,9 +2201,12 @@ function updateListeners (
       );
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur);
+        cur = on[name] = createFnInvoker(cur, vm);
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params);
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture);
+      }
+      add(event.name, cur, event.capture, event.passive, event.params);
     } else if (cur !== old) {
       old.fns = cur;
       on[name] = old;
@@ -2249,293 +2412,75 @@ function normalizeArrayChildren (children, nestedIndex) {
 
 /*  */
 
-function ensureCtor (comp, base) {
-  if (
-    comp.__esModule ||
-    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
-  ) {
-    comp = comp.default;
+function initProvide (vm) {
+  var provide = vm.$options.provide;
+  if (provide) {
+    vm._provided = typeof provide === 'function'
+      ? provide.call(vm)
+      : provide;
   }
-  return isObject(comp)
-    ? base.extend(comp)
-    : comp
-}
-
-function createAsyncPlaceholder (
-  factory,
-  data,
-  context,
-  children,
-  tag
-) {
-  var node = createEmptyVNode();
-  node.asyncFactory = factory;
-  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
-  return node
 }
 
-function resolveAsyncComponent (
-  factory,
-  baseCtor,
-  context
-) {
-  if (isTrue(factory.error) && isDef(factory.errorComp)) {
-    return factory.errorComp
+function initInjections (vm) {
+  var result = resolveInject(vm.$options.inject, vm);
+  if (result) {
+    toggleObserving(false);
+    Object.keys(result).forEach(function (key) {
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production') {
+        defineReactive$$1(vm, key, result[key], function () {
+          warn(
+            "Avoid mutating an injected value directly since the changes will be " +
+            "overwritten whenever the provided component re-renders. " +
+            "injection being mutated: \"" + key + "\"",
+            vm
+          );
+        });
+      } else {
+        defineReactive$$1(vm, key, result[key]);
+      }
+    });
+    toggleObserving(true);
   }
+}
 
-  if (isDef(factory.resolved)) {
-    return factory.resolved
-  }
+function resolveInject (inject, vm) {
+  if (inject) {
+    // inject is :any because flow is not smart enough to figure out cached
+    var result = Object.create(null);
+    var keys = hasSymbol
+      ? Reflect.ownKeys(inject)
+      : Object.keys(inject);
 
-  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
-    return factory.loadingComp
+    for (var i = 0; i < keys.length; i++) {
+      var key = keys[i];
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') { continue }
+      var provideKey = inject[key].from;
+      var source = vm;
+      while (source) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
+          result[key] = source._provided[provideKey];
+          break
+        }
+        source = source.$parent;
+      }
+      if (!source) {
+        if ('default' in inject[key]) {
+          var provideDefault = inject[key].default;
+          result[key] = typeof provideDefault === 'function'
+            ? provideDefault.call(vm)
+            : provideDefault;
+        } else if (process.env.NODE_ENV !== 'production') {
+          warn(("Injection \"" + key + "\" not found"), vm);
+        }
+      }
+    }
+    return result
   }
+}
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context);
-  } else {
-    var contexts = factory.contexts = [context];
-    var sync = true;
-
-    var forceRender = function () {
-      for (var i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate();
-      }
-    };
-
-    var resolve = once(function (res) {
-      // cache resolved
-      factory.resolved = ensureCtor(res, baseCtor);
-      // invoke callbacks only if this is not a synchronous resolve
-      // (async resolves are shimmed as synchronous during SSR)
-      if (!sync) {
-        forceRender();
-      }
-    });
-
-    var reject = once(function (reason) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed to resolve async component: " + (String(factory)) +
-        (reason ? ("\nReason: " + reason) : '')
-      );
-      if (isDef(factory.errorComp)) {
-        factory.error = true;
-        forceRender();
-      }
-    });
-
-    var res = factory(resolve, reject);
-
-    if (isObject(res)) {
-      if (typeof res.then === 'function') {
-        // () => Promise
-        if (isUndef(factory.resolved)) {
-          res.then(resolve, reject);
-        }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
-        res.component.then(resolve, reject);
-
-        if (isDef(res.error)) {
-          factory.errorComp = ensureCtor(res.error, baseCtor);
-        }
-
-        if (isDef(res.loading)) {
-          factory.loadingComp = ensureCtor(res.loading, baseCtor);
-          if (res.delay === 0) {
-            factory.loading = true;
-          } else {
-            setTimeout(function () {
-              if (isUndef(factory.resolved) && isUndef(factory.error)) {
-                factory.loading = true;
-                forceRender();
-              }
-            }, res.delay || 200);
-          }
-        }
-
-        if (isDef(res.timeout)) {
-          setTimeout(function () {
-            if (isUndef(factory.resolved)) {
-              reject(
-                process.env.NODE_ENV !== 'production'
-                  ? ("timeout (" + (res.timeout) + "ms)")
-                  : null
-              );
-            }
-          }, res.timeout);
-        }
-      }
-    }
-
-    sync = false;
-    // return in case resolved synchronously
-    return factory.loading
-      ? factory.loadingComp
-      : factory.resolved
-  }
-}
-
-/*  */
-
-function isAsyncPlaceholder (node) {
-  return node.isComment && node.asyncFactory
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  if (Array.isArray(children)) {
-    for (var i = 0; i < children.length; i++) {
-      var c = children[i];
-      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
-        return c
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
-function initEvents (vm) {
-  vm._events = Object.create(null);
-  vm._hasHookEvent = false;
-  // init parent attached events
-  var listeners = vm.$options._parentListeners;
-  if (listeners) {
-    updateComponentListeners(vm, listeners);
-  }
-}
-
-var target;
-
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn);
-  } else {
-    target.$on(event, fn);
-  }
-}
-
-function remove$1 (event, fn) {
-  target.$off(event, fn);
-}
-
-function updateComponentListeners (
-  vm,
-  listeners,
-  oldListeners
-) {
-  target = vm;
-  updateListeners(listeners, oldListeners || {}, add, remove$1, vm);
-  target = undefined;
-}
-
-function eventsMixin (Vue) {
-  var hookRE = /^hook:/;
-  Vue.prototype.$on = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$on(event[i], fn);
-      }
-    } else {
-      (vm._events[event] || (vm._events[event] = [])).push(fn);
-      // optimize hook:event cost by using a boolean flag marked at registration
-      // instead of a hash lookup
-      if (hookRE.test(event)) {
-        vm._hasHookEvent = true;
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$once = function (event, fn) {
-    var vm = this;
-    function on () {
-      vm.$off(event, on);
-      fn.apply(vm, arguments);
-    }
-    on.fn = fn;
-    vm.$on(event, on);
-    return vm
-  };
-
-  Vue.prototype.$off = function (event, fn) {
-    var this$1 = this;
-
-    var vm = this;
-    // all
-    if (!arguments.length) {
-      vm._events = Object.create(null);
-      return vm
-    }
-    // array of events
-    if (Array.isArray(event)) {
-      for (var i = 0, l = event.length; i < l; i++) {
-        this$1.$off(event[i], fn);
-      }
-      return vm
-    }
-    // specific event
-    var cbs = vm._events[event];
-    if (!cbs) {
-      return vm
-    }
-    if (!fn) {
-      vm._events[event] = null;
-      return vm
-    }
-    if (fn) {
-      // specific handler
-      var cb;
-      var i$1 = cbs.length;
-      while (i$1--) {
-        cb = cbs[i$1];
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i$1, 1);
-          break
-        }
-      }
-    }
-    return vm
-  };
-
-  Vue.prototype.$emit = function (event) {
-    var vm = this;
-    if (process.env.NODE_ENV !== 'production') {
-      var lowerCaseEvent = event.toLowerCase();
-      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
-        tip(
-          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
-          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
-          "Note that HTML attributes are case-insensitive and you cannot use " +
-          "v-on to listen to camelCase events when using in-DOM templates. " +
-          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
-        );
-      }
-    }
-    var cbs = vm._events[event];
-    if (cbs) {
-      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
-      var args = toArray(arguments, 1);
-      for (var i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args);
-        } catch (e) {
-          handleError(e, vm, ("event handler for \"" + event + "\""));
-        }
-      }
-    }
-    return vm
-  };
-}
-
-/*  */
+/*  */
 
 
 
@@ -2546,10 +2491,10 @@ function resolveSlots (
   children,
   context
 ) {
-  var slots = {};
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  var slots = {};
   for (var i = 0, l = children.length; i < l; i++) {
     var child = children[i];
     var data = child.data;
@@ -2586,2159 +2531,2633 @@ function isWhitespace (node) {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
 
-function resolveScopedSlots (
-  fns, // see flow/vnode
-  res
+/*  */
+
+function normalizeScopedSlots (
+  slots,
+  normalSlots,
+  prevSlots
 ) {
-  res = res || {};
-  for (var i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res);
-    } else {
-      res[fns[i].key] = fns[i].fn;
+  var res;
+  var hasNormalSlots = Object.keys(normalSlots).length > 0;
+  var isStable = slots ? !!slots.$stable : !hasNormalSlots;
+  var key = slots && slots.$key;
+  if (!slots) {
+    res = {};
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {};
+    for (var key$1 in slots) {
+      if (slots[key$1] && key$1[0] !== '$') {
+        res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (var key$2 in normalSlots) {
+    if (!(key$2 in res)) {
+      res[key$2] = proxyNormalSlot(normalSlots, key$2);
     }
   }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots)._normalized = res;
+  }
+  def(res, '$stable', isStable);
+  def(res, '$key', key);
+  def(res, '$hasNormal', hasNormalSlots);
   return res
 }
 
-/*  */
+function normalizeScopedSlot(normalSlots, key, fn) {
+  var normalized = function () {
+    var res = arguments.length ? fn.apply(null, arguments) : fn({});
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res);
+    return res && (
+      res.length === 0 ||
+      (res.length === 1 && res[0].isComment) // #9658
+    ) ? undefined
+      : res
+  };
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    });
+  }
+  return normalized
+}
 
-var activeInstance = null;
-var isUpdatingChildComponent = false;
+function proxyNormalSlot(slots, key) {
+  return function () { return slots[key]; }
+}
 
-function initLifecycle (vm) {
-  var options = vm.$options;
+/*  */
 
-  // locate first non-abstract parent
-  var parent = options.parent;
-  if (parent && !options.abstract) {
-    while (parent.$options.abstract && parent.$parent) {
-      parent = parent.$parent;
+/**
+ * Runtime helper for rendering v-for lists.
+ */
+function renderList (
+  val,
+  render
+) {
+  var ret, i, l, keys, key;
+  if (Array.isArray(val) || typeof val === 'string') {
+    ret = new Array(val.length);
+    for (i = 0, l = val.length; i < l; i++) {
+      ret[i] = render(val[i], i);
     }
-    parent.$children.push(vm);
+  } else if (typeof val === 'number') {
+    ret = new Array(val);
+    for (i = 0; i < val; i++) {
+      ret[i] = render(i + 1, i);
+    }
+  } else if (isObject(val)) {
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = [];
+      var iterator = val[Symbol.iterator]();
+      var result = iterator.next();
+      while (!result.done) {
+        ret.push(render(result.value, ret.length));
+        result = iterator.next();
+      }
+    } else {
+      keys = Object.keys(val);
+      ret = new Array(keys.length);
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i];
+        ret[i] = render(val[key], key, i);
+      }
+    }
+  }
+  if (!isDef(ret)) {
+    ret = [];
   }
+  (ret)._isVList = true;
+  return ret
+}
 
-  vm.$parent = parent;
-  vm.$root = parent ? parent.$root : vm;
-
-  vm.$children = [];
-  vm.$refs = {};
-
-  vm._watcher = null;
-  vm._inactive = null;
-  vm._directInactive = false;
-  vm._isMounted = false;
-  vm._isDestroyed = false;
-  vm._isBeingDestroyed = false;
-}
-
-function lifecycleMixin (Vue) {
-  Vue.prototype._update = function (vnode, hydrating) {
-    var vm = this;
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate');
-    }
-    var prevEl = vm.$el;
-    var prevVnode = vm._vnode;
-    var prevActiveInstance = activeInstance;
-    activeInstance = vm;
-    vm._vnode = vnode;
-    // Vue.prototype.__patch__ is injected in entry points
-    // based on the rendering backend used.
-    if (!prevVnode) {
-      // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      );
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null;
-    } else {
-      // updates
-      vm.$el = vm.__patch__(prevVnode, vnode);
-    }
-    activeInstance = prevActiveInstance;
-    // update __vue__ reference
-    if (prevEl) {
-      prevEl.__vue__ = null;
-    }
-    if (vm.$el) {
-      vm.$el.__vue__ = vm;
-    }
-    // if parent is an HOC, update its $el as well
-    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
-      vm.$parent.$el = vm.$el;
-    }
-    // updated hook is called by the scheduler to ensure that children are
-    // updated in a parent's updated hook.
-  };
-
-  Vue.prototype.$forceUpdate = function () {
-    var vm = this;
-    if (vm._watcher) {
-      vm._watcher.update();
-    }
-  };
-
-  Vue.prototype.$destroy = function () {
-    var vm = this;
-    if (vm._isBeingDestroyed) {
-      return
-    }
-    callHook(vm, 'beforeDestroy');
-    vm._isBeingDestroyed = true;
-    // remove self from parent
-    var parent = vm.$parent;
-    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
-      remove(parent.$children, vm);
-    }
-    // teardown watchers
-    if (vm._watcher) {
-      vm._watcher.teardown();
-    }
-    var i = vm._watchers.length;
-    while (i--) {
-      vm._watchers[i].teardown();
-    }
-    // remove reference from data ob
-    // frozen object may not have observer.
-    if (vm._data.__ob__) {
-      vm._data.__ob__.vmCount--;
-    }
-    // call the last hook...
-    vm._isDestroyed = true;
-    // invoke destroy hooks on current rendered tree
-    vm.__patch__(vm._vnode, null);
-    // fire destroyed hook
-    callHook(vm, 'destroyed');
-    // turn off all instance listeners.
-    vm.$off();
-    // remove __vue__ reference
-    if (vm.$el) {
-      vm.$el.__vue__ = null;
-    }
-    // release circular reference (#6759)
-    if (vm.$vnode) {
-      vm.$vnode.parent = null;
-    }
-  };
-}
+/*  */
 
-function mountComponent (
-  vm,
-  el,
-  hydrating
+/**
+ * Runtime helper for rendering <slot>
+ */
+function renderSlot (
+  name,
+  fallback,
+  props,
+  bindObject
 ) {
-  vm.$el = el;
-  if (!vm.$options.render) {
-    vm.$options.render = createEmptyVNode;
-    if (process.env.NODE_ENV !== 'production') {
-      /* istanbul ignore if */
-      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
-        vm.$options.el || el) {
-        warn(
-          'You are using the runtime-only build of Vue where the template ' +
-          'compiler is not available. Either pre-compile the templates into ' +
-          'render functions, or use the compiler-included build.',
-          vm
-        );
-      } else {
+  var scopedSlotFn = this.$scopedSlots[name];
+  var nodes;
+  if (scopedSlotFn) { // scoped slot
+    props = props || {};
+    if (bindObject) {
+      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
         warn(
-          'Failed to mount component: template or render function not defined.',
-          vm
+          'slot v-bind without argument expects an Object',
+          this
         );
       }
+      props = extend(extend({}, bindObject), props);
     }
-  }
-  callHook(vm, 'beforeMount');
-
-  var updateComponent;
-  /* istanbul ignore if */
-  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
-    updateComponent = function () {
-      var name = vm._name;
-      var id = vm._uid;
-      var startTag = "vue-perf-start:" + id;
-      var endTag = "vue-perf-end:" + id;
-
-      mark(startTag);
-      var vnode = vm._render();
-      mark(endTag);
-      measure(("vue " + name + " render"), startTag, endTag);
-
-      mark(startTag);
-      vm._update(vnode, hydrating);
-      mark(endTag);
-      measure(("vue " + name + " patch"), startTag, endTag);
-    };
+    nodes = scopedSlotFn(props) || fallback;
   } else {
-    updateComponent = function () {
-      vm._update(vm._render(), hydrating);
-    };
+    nodes = this.$slots[name] || fallback;
   }
 
-  // we set this to vm._watcher inside the watcher's constructor
-  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
-  // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */);
-  hydrating = false;
-
-  // manually mounted instance, call mounted on self
-  // mounted is called for render-created child components in its inserted hook
-  if (vm.$vnode == null) {
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
+  var target = props && props.slot;
+  if (target) {
+    return this.$createElement('template', { slot: target }, nodes)
+  } else {
+    return nodes
   }
-  return vm
 }
 
-function updateChildComponent (
-  vm,
-  propsData,
-  listeners,
-  parentVnode,
-  renderChildren
-) {
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = true;
-  }
-
-  // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  var hasChildren = !!(
-    renderChildren ||               // has new static slots
-    vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
-  );
-
-  vm.$options._parentVnode = parentVnode;
-  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
-
-  if (vm._vnode) { // update child tree's parent
-    vm._vnode.parent = parentVnode;
-  }
-  vm.$options._renderChildren = renderChildren;
-
-  // update $attrs and $listeners hash
-  // these are also reactive so they may trigger child update if the child
-  // used them during render
-  vm.$attrs = (parentVnode.data && parentVnode.data.attrs) || emptyObject;
-  vm.$listeners = listeners || emptyObject;
+/*  */
 
-  // update props
-  if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false;
-    var props = vm._props;
-    var propKeys = vm.$options._propKeys || [];
-    for (var i = 0; i < propKeys.length; i++) {
-      var key = propKeys[i];
-      props[key] = validateProp(key, vm.$options.props, propsData, vm);
-    }
-    observerState.shouldConvert = true;
-    // keep a copy of raw propsData
-    vm.$options.propsData = propsData;
-  }
+/**
+ * Runtime helper for resolving filters
+ */
+function resolveFilter (id) {
+  return resolveAsset(this.$options, 'filters', id, true) || identity
+}
 
-  // update listeners
-  if (listeners) {
-    var oldListeners = vm.$options._parentListeners;
-    vm.$options._parentListeners = listeners;
-    updateComponentListeners(vm, listeners, oldListeners);
-  }
-  // resolve slots + force update if has children
-  if (hasChildren) {
-    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
-    vm.$forceUpdate();
-  }
+/*  */
 
-  if (process.env.NODE_ENV !== 'production') {
-    isUpdatingChildComponent = false;
+function isKeyNotMatch (expect, actual) {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
   }
 }
 
-function isInInactiveTree (vm) {
-  while (vm && (vm = vm.$parent)) {
-    if (vm._inactive) { return true }
+/**
+ * Runtime helper for checking keyCodes from config.
+ * exposed as Vue.prototype._k
+ * passing in eventKeyName as last argument separately for backwards compat
+ */
+function checkKeyCodes (
+  eventKeyCode,
+  key,
+  builtInKeyCode,
+  eventKeyName,
+  builtInKeyName
+) {
+  var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
+  } else if (eventKeyName) {
+    return hyphenate(eventKeyName) !== key
   }
-  return false
 }
 
-function activateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = false;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  } else if (vm._directInactive) {
-    return
-  }
-  if (vm._inactive || vm._inactive === null) {
-    vm._inactive = false;
-    for (var i = 0; i < vm.$children.length; i++) {
-      activateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'activated');
-  }
-}
-
-function deactivateChildComponent (vm, direct) {
-  if (direct) {
-    vm._directInactive = true;
-    if (isInInactiveTree(vm)) {
-      return
-    }
-  }
-  if (!vm._inactive) {
-    vm._inactive = true;
-    for (var i = 0; i < vm.$children.length; i++) {
-      deactivateChildComponent(vm.$children[i]);
-    }
-    callHook(vm, 'deactivated');
-  }
-}
+/*  */
 
-function callHook (vm, hook) {
-  var handlers = vm.$options[hook];
-  if (handlers) {
-    for (var i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm);
-      } catch (e) {
-        handleError(e, vm, (hook + " hook"));
+/**
+ * Runtime helper for merging v-bind="object" into a VNode's data.
+ */
+function bindObjectProps (
+  data,
+  tag,
+  value,
+  asProp,
+  isSync
+) {
+  if (value) {
+    if (!isObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-bind without argument expects an Object or Array value',
+        this
+      );
+    } else {
+      if (Array.isArray(value)) {
+        value = toObject(value);
       }
+      var hash;
+      var loop = function ( key ) {
+        if (
+          key === 'class' ||
+          key === 'style' ||
+          isReservedAttribute(key)
+        ) {
+          hash = data;
+        } else {
+          var type = data.attrs && data.attrs.type;
+          hash = asProp || config.mustUseProp(tag, type, key)
+            ? data.domProps || (data.domProps = {})
+            : data.attrs || (data.attrs = {});
+        }
+        var camelizedKey = camelize(key);
+        var hyphenatedKey = hyphenate(key);
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
+          hash[key] = value[key];
+
+          if (isSync) {
+            var on = data.on || (data.on = {});
+            on[("update:" + key)] = function ($event) {
+              value[key] = $event;
+            };
+          }
+        }
+      };
+
+      for (var key in value) loop( key );
     }
   }
-  if (vm._hasHookEvent) {
-    vm.$emit('hook:' + hook);
-  }
+  return data
 }
 
 /*  */
 
-
-var MAX_UPDATE_COUNT = 100;
-
-var queue = [];
-var activatedChildren = [];
-var has = {};
-var circular = {};
-var waiting = false;
-var flushing = false;
-var index = 0;
-
 /**
- * Reset the scheduler's state.
+ * Runtime helper for rendering static trees.
  */
-function resetSchedulerState () {
-  index = queue.length = activatedChildren.length = 0;
-  has = {};
-  if (process.env.NODE_ENV !== 'production') {
-    circular = {};
+function renderStatic (
+  index,
+  isInFor
+) {
+  var cached = this._staticTrees || (this._staticTrees = []);
+  var tree = cached[index];
+  // if has already-rendered static tree and not inside v-for,
+  // we can reuse the same tree.
+  if (tree && !isInFor) {
+    return tree
   }
-  waiting = flushing = false;
+  // otherwise, render a fresh tree.
+  tree = cached[index] = this.$options.staticRenderFns[index].call(
+    this._renderProxy,
+    null,
+    this // for render fns generated for functional component templates
+  );
+  markStatic(tree, ("__static__" + index), false);
+  return tree
 }
 
 /**
- * Flush both queues and run the watchers.
+ * Runtime helper for v-once.
+ * Effectively it means marking the node as static with a unique key.
  */
-function flushSchedulerQueue () {
-  flushing = true;
-  var watcher, id;
-
-  // Sort queue before flush.
-  // This ensures that:
-  // 1. Components are updated from parent to child. (because parent is always
-  //    created before the child)
-  // 2. A component's user watchers are run before its render watcher (because
-  //    user watchers are created before the render watcher)
-  // 3. If a component is destroyed during a parent component's watcher run,
-  //    its watchers can be skipped.
-  queue.sort(function (a, b) { return a.id - b.id; });
+function markOnce (
+  tree,
+  index,
+  key
+) {
+  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
+  return tree
+}
 
-  // do not cache length because more watchers might be pushed
-  // as we run existing watchers
-  for (index = 0; index < queue.length; index++) {
-    watcher = queue[index];
-    id = watcher.id;
-    has[id] = null;
-    watcher.run();
-    // in dev build, check and stop circular updates.
-    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
-      circular[id] = (circular[id] || 0) + 1;
-      if (circular[id] > MAX_UPDATE_COUNT) {
-        warn(
-          'You may have an infinite update loop ' + (
-            watcher.user
-              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
-              : "in a component render function."
-          ),
-          watcher.vm
-        );
-        break
+function markStatic (
+  tree,
+  key,
+  isOnce
+) {
+  if (Array.isArray(tree)) {
+    for (var i = 0; i < tree.length; i++) {
+      if (tree[i] && typeof tree[i] !== 'string') {
+        markStaticNode(tree[i], (key + "_" + i), isOnce);
       }
     }
+  } else {
+    markStaticNode(tree, key, isOnce);
   }
+}
 
-  // keep copies of post queues before resetting state
-  var activatedQueue = activatedChildren.slice();
-  var updatedQueue = queue.slice();
-
-  resetSchedulerState();
+function markStaticNode (node, key, isOnce) {
+  node.isStatic = true;
+  node.key = key;
+  node.isOnce = isOnce;
+}
 
-  // call component updated and activated hooks
-  callActivatedHooks(activatedQueue);
-  callUpdatedHooks(updatedQueue);
+/*  */
 
-  // devtool hook
-  /* istanbul ignore if */
-  if (devtools && config.devtools) {
-    devtools.emit('flush');
+function bindObjectListeners (data, value) {
+  if (value) {
+    if (!isPlainObject(value)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        'v-on without argument expects an Object value',
+        this
+      );
+    } else {
+      var on = data.on = data.on ? extend({}, data.on) : {};
+      for (var key in value) {
+        var existing = on[key];
+        var ours = value[key];
+        on[key] = existing ? [].concat(existing, ours) : ours;
+      }
+    }
   }
+  return data
 }
 
-function callUpdatedHooks (queue) {
-  var i = queue.length;
-  while (i--) {
-    var watcher = queue[i];
-    var vm = watcher.vm;
-    if (vm._watcher === watcher && vm._isMounted) {
-      callHook(vm, 'updated');
+/*  */
+
+function resolveScopedSlots (
+  fns, // see flow/vnode
+  res,
+  // the following are added in 2.6
+  hasDynamicKeys,
+  contentHashKey
+) {
+  res = res || { $stable: !hasDynamicKeys };
+  for (var i = 0; i < fns.length; i++) {
+    var slot = fns[i];
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys);
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true;
+      }
+      res[slot.key] = slot.fn;
     }
   }
+  if (contentHashKey) {
+    (res).$key = contentHashKey;
+  }
+  return res
 }
 
-/**
- * Queue a kept-alive component that was activated during patch.
- * The queue will be processed after the entire tree has been patched.
- */
-function queueActivatedComponent (vm) {
-  // setting _inactive to false here so that a render function can
-  // rely on checking whether it's in an inactive tree (e.g. router-view)
-  vm._inactive = false;
-  activatedChildren.push(vm);
-}
+/*  */
 
-function callActivatedHooks (queue) {
-  for (var i = 0; i < queue.length; i++) {
-    queue[i]._inactive = true;
-    activateChildComponent(queue[i], true /* true */);
+function bindDynamicKeys (baseObj, values) {
+  for (var i = 0; i < values.length; i += 2) {
+    var key = values[i];
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1];
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        ("Invalid value for dynamic directive argument (expected string or null): " + key),
+        this
+      );
+    }
   }
+  return baseObj
 }
 
-/**
- * Push a watcher into the watcher queue.
- * Jobs with duplicate IDs will be skipped unless it's
- * pushed when the queue is being flushed.
- */
-function queueWatcher (watcher) {
-  var id = watcher.id;
-  if (has[id] == null) {
-    has[id] = true;
-    if (!flushing) {
-      queue.push(watcher);
-    } else {
-      // if already flushing, splice the watcher based on its id
-      // if already past its id, it will be run next immediately.
-      var i = queue.length - 1;
-      while (i > index && queue[i].id > watcher.id) {
-        i--;
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+function prependModifier (value, symbol) {
+  return typeof value === 'string' ? symbol + value : value
+}
+
+/*  */
+
+function installRenderHelpers (target) {
+  target._o = markOnce;
+  target._n = toNumber;
+  target._s = toString;
+  target._l = renderList;
+  target._t = renderSlot;
+  target._q = looseEqual;
+  target._i = looseIndexOf;
+  target._m = renderStatic;
+  target._f = resolveFilter;
+  target._k = checkKeyCodes;
+  target._b = bindObjectProps;
+  target._v = createTextVNode;
+  target._e = createEmptyVNode;
+  target._u = resolveScopedSlots;
+  target._g = bindObjectListeners;
+  target._d = bindDynamicKeys;
+  target._p = prependModifier;
+}
+
+/*  */
+
+function FunctionalRenderContext (
+  data,
+  props,
+  children,
+  parent,
+  Ctor
+) {
+  var this$1 = this;
+
+  var options = Ctor.options;
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var contextVm;
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent);
+    // $flow-disable-line
+    contextVm._original = parent;
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent;
+    // $flow-disable-line
+    parent = parent._original;
+  }
+  var isCompiled = isTrue(options._compiled);
+  var needNormalization = !isCompiled;
+
+  this.data = data;
+  this.props = props;
+  this.children = children;
+  this.parent = parent;
+  this.listeners = data.on || emptyObject;
+  this.injections = resolveInject(options.inject, parent);
+  this.slots = function () {
+    if (!this$1.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this$1.$slots = resolveSlots(children, parent)
+      );
+    }
+    return this$1.$slots
+  };
+
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get: function get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }));
+
+  // support for compiled functional template
+  if (isCompiled) {
+    // exposing $options for renderStatic()
+    this.$options = options;
+    // pre-resolve slots for renderSlot()
+    this.$slots = this.slots();
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
+  }
+
+  if (options._scopeId) {
+    this._c = function (a, b, c, d) {
+      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
+      if (vnode && !Array.isArray(vnode)) {
+        vnode.fnScopeId = options._scopeId;
+        vnode.fnContext = parent;
       }
-      queue.splice(i + 1, 0, watcher);
+      return vnode
+    };
+  } else {
+    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+  }
+}
+
+installRenderHelpers(FunctionalRenderContext.prototype);
+
+function createFunctionalComponent (
+  Ctor,
+  propsData,
+  data,
+  contextVm,
+  children
+) {
+  var options = Ctor.options;
+  var props = {};
+  var propOptions = options.props;
+  if (isDef(propOptions)) {
+    for (var key in propOptions) {
+      props[key] = validateProp(key, propOptions, propsData || emptyObject);
     }
-    // queue the flush
-    if (!waiting) {
-      waiting = true;
-      nextTick(flushSchedulerQueue);
+  } else {
+    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
+    if (isDef(data.props)) { mergeProps(props, data.props); }
+  }
+
+  var renderContext = new FunctionalRenderContext(
+    data,
+    props,
+    children,
+    contextVm,
+    Ctor
+  );
+
+  var vnode = options.render.call(null, renderContext._c, renderContext);
+
+  if (vnode instanceof VNode) {
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
+  } else if (Array.isArray(vnode)) {
+    var vnodes = normalizeChildren(vnode) || [];
+    var res = new Array(vnodes.length);
+    for (var i = 0; i < vnodes.length; i++) {
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
     }
+    return res
+  }
+}
+
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  var clone = cloneVNode(vnode);
+  clone.fnContext = contextVm;
+  clone.fnOptions = options;
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
+  }
+  if (data.slot) {
+    (clone.data || (clone.data = {})).slot = data.slot;
+  }
+  return clone
+}
+
+function mergeProps (to, from) {
+  for (var key in from) {
+    to[camelize(key)] = from[key];
   }
 }
 
 /*  */
 
-var uid$2 = 0;
+var RECYCLE_LIST_MARKER = '@inRecycleList';
 
-/**
- * A watcher parses an expression, collects dependencies,
- * and fires callback when the expression value changes.
- * This is used for both the $watch() api and directives.
- */
-var Watcher = function Watcher (
-  vm,
-  expOrFn,
-  cb,
-  options,
-  isRenderWatcher
+// Register the component hook to weex native render engine.
+// The hook will be triggered by native, not javascript.
+function registerComponentHook (
+  componentId,
+  type, // hook type, could be "lifecycle" or "instance"
+  hook, // hook name
+  fn
 ) {
-  this.vm = vm;
-  if (isRenderWatcher) {
-    vm._watcher = this;
+  if (!document || !document.taskCenter) {
+    warn("Can't find available \"document\" or \"taskCenter\".");
+    return
   }
-  vm._watchers.push(this);
-  // options
-  if (options) {
-    this.deep = !!options.deep;
-    this.user = !!options.user;
-    this.lazy = !!options.lazy;
-    this.sync = !!options.sync;
+  if (typeof document.taskCenter.registerHook === 'function') {
+    return document.taskCenter.registerHook(componentId, type, hook, fn)
+  }
+  warn(("Failed to register component hook \"" + type + "@" + hook + "#" + componentId + "\"."));
+}
+
+// Updates the state of the component to weex native render engine.
+function updateComponentData (
+  componentId,
+  newData,
+  callback
+) {
+  if (!document || !document.taskCenter) {
+    warn("Can't find available \"document\" or \"taskCenter\".");
+    return
+  }
+  if (typeof document.taskCenter.updateData === 'function') {
+    return document.taskCenter.updateData(componentId, newData, callback)
+  }
+  warn(("Failed to update component data (" + componentId + ")."));
+}
+
+/*  */
+
+var uid$1 = 0;
+
+// override Vue.prototype._init
+function initVirtualComponent (options) {
+  if ( options === void 0 ) options = {};
+
+  var vm = this;
+  var componentId = options.componentId;
+
+  // virtual component uid
+  vm._uid = "virtual-component-" + (uid$1++);
+
+  // a flag to avoid this being observed
+  vm._isVue = true;
+  // merge options
+  if (options && options._isComponent) {
+    // optimize internal component instantiation
+    // since dynamic options merging is pretty slow, and none of the
+    // internal component options needs special treatment.
+    initInternalComponent(vm, options);
   } else {
-    this.deep = this.user = this.lazy = this.sync = false;
+    vm.$options = mergeOptions(
+      resolveConstructorOptions(vm.constructor),
+      options || {},
+      vm
+    );
   }
-  this.cb = cb;
-  this.id = ++uid$2; // uid for batching
-  this.active = true;
-  this.dirty = this.lazy; // for lazy watchers
-  this.deps = [];
-  this.newDeps = [];
-  this.depIds = new _Set();
-  this.newDepIds = new _Set();
-  this.expression = process.env.NODE_ENV !== 'production'
-    ? expOrFn.toString()
-    : '';
-  // parse expression for getter
-  if (typeof expOrFn === 'function') {
-    this.getter = expOrFn;
+
+  /* istanbul ignore else */
+  if (process.env.NODE_ENV !== 'production') {
+    initProxy(vm);
   } else {
-    this.getter = parsePath(expOrFn);
-    if (!this.getter) {
-      this.getter = function () {};
-      process.env.NODE_ENV !== 'production' && warn(
-        "Failed watching path: \"" + expOrFn + "\" " +
-        'Watcher only accepts simple dot-delimited paths. ' +
-        'For full control, use a function instead.',
-        vm
-      );
-    }
+    vm._renderProxy = vm;
   }
-  this.value = this.lazy
-    ? undefined
-    : this.get();
-};
 
-/**
- * Evaluate the getter, and re-collect dependencies.
- */
-Watcher.prototype.get = function get () {
-  pushTarget(this);
-  var value;
-  var vm = this.vm;
-  try {
-    value = this.getter.call(vm, vm);
-  } catch (e) {
-    if (this.user) {
-      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
-    } else {
-      throw e
-    }
-  } finally {
-    // "touch" every property so they are all tracked as
-    // dependencies for deep watching
-    if (this.deep) {
-      traverse(value);
-    }
-    popTarget();
-    this.cleanupDeps();
+  vm._self = vm;
+  initLifecycle(vm);
+  initEvents(vm);
+  initRender(vm);
+  callHook(vm, 'beforeCreate');
+  initInjections(vm); // resolve injections before data/props
+  initState(vm);
+  initProvide(vm); // resolve provide after data/props
+  callHook(vm, 'created');
+
+  // send initial data to native
+  var data = vm.$options.data;
+  var params = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (isPlainObject(params)) {
+    updateComponentData(componentId, params);
   }
-  return value
-};
 
-/**
- * Add a dependency to this directive.
- */
-Watcher.prototype.addDep = function addDep (dep) {
-  var id = dep.id;
-  if (!this.newDepIds.has(id)) {
-    this.newDepIds.add(id);
-    this.newDeps.push(dep);
-    if (!this.depIds.has(id)) {
-      dep.addSub(this);
-    }
+  registerComponentHook(componentId, 'lifecycle', 'attach', function () {
+    callHook(vm, 'beforeMount');
+
+    var updateComponent = function () {
+      vm._update(vm._vnode, false);
+    };
+    new Watcher(vm, updateComponent, noop, null, true);
+
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  });
+
+  registerComponentHook(componentId, 'lifecycle', 'detach', function () {
+    vm.$destroy();
+  });
+}
+
+// override Vue.prototype._update
+function updateVirtualComponent (vnode) {
+  var vm = this;
+  var componentId = vm.$options.componentId;
+  if (vm._isMounted) {
+    callHook(vm, 'beforeUpdate');
   }
-};
+  vm._vnode = vnode;
+  if (vm._isMounted && componentId) {
+    // TODO: data should be filtered and without bindings
+    var data = Object.assign({}, vm._data);
+    updateComponentData(componentId, data, function () {
+      callHook(vm, 'updated');
+    });
+  }
+}
 
-/**
- * Clean up for dependency collection.
- */
-Watcher.prototype.cleanupDeps = function cleanupDeps () {
-    var this$1 = this;
+// listening on native callback
+function resolveVirtualComponent (vnode) {
+  var BaseCtor = vnode.componentOptions.Ctor;
+  var VirtualComponent = BaseCtor.extend({});
+  var cid = VirtualComponent.cid;
+  VirtualComponent.prototype._init = initVirtualComponent;
+  VirtualComponent.prototype._update = updateVirtualComponent;
 
-  var i = this.deps.length;
-  while (i--) {
-    var dep = this$1.deps[i];
-    if (!this$1.newDepIds.has(dep.id)) {
-      dep.removeSub(this$1);
+  vnode.componentOptions.Ctor = BaseCtor.extend({
+    beforeCreate: function beforeCreate () {
+      // const vm: Component = this
+
+      // TODO: listen on all events and dispatch them to the
+      // corresponding virtual components according to the componentId.
+      // vm._virtualComponents = {}
+      var createVirtualComponent = function (componentId, propsData) {
+        // create virtual component
+        // const subVm =
+        new VirtualComponent({
+          componentId: componentId,
+          propsData: propsData
+        });
+        // if (vm._virtualComponents) {
+        //   vm._virtualComponents[componentId] = subVm
+        // }
+      };
+
+      registerComponentHook(cid, 'lifecycle', 'create', createVirtualComponent);
+    },
+    beforeDestroy: function beforeDestroy () {
+      delete this._virtualComponents;
     }
-  }
-  var tmp = this.depIds;
-  this.depIds = this.newDepIds;
-  this.newDepIds = tmp;
-  this.newDepIds.clear();
-  tmp = this.deps;
-  this.deps = this.newDeps;
-  this.newDeps = tmp;
-  this.newDeps.length = 0;
-};
+  });
+}
 
-/**
- * Subscriber interface.
- * Will be called when a dependency changes.
- */
-Watcher.prototype.update = function update () {
-  /* istanbul ignore else */
-  if (this.lazy) {
-    this.dirty = true;
-  } else if (this.sync) {
-    this.run();
+/*  */
+
+function isRecyclableComponent (vnode) {
+  return vnode.data.attrs
+    ? (RECYCLE_LIST_MARKER in vnode.data.attrs)
+    : false
+}
+
+function renderRecyclableComponentTemplate (vnode) {
+  // $flow-disable-line
+  delete vnode.data.attrs[RECYCLE_LIST_MARKER];
+  resolveVirtualComponent(vnode);
+  var vm = createComponentInstanceForVnode(vnode);
+  var render = (vm.$options)['@render'];
+  if (render) {
+    try {
+      return render.call(vm)
+    } catch (err) {
+      handleError(err, vm, "@render");
+    }
   } else {
-    queueWatcher(this);
+    warn(
+      "@render function not defined on component used in <recycle-list>. " +
+      "Make sure to declare `recyclable=\"true\"` on the component's template.",
+      vm
+    );
   }
-};
+}
+
+/*  */
+
+// inline hooks to be invoked on component VNodes during patch
+var componentVNodeHooks = {
+  init: function init (vnode, hydrating) {
+    if (
+      vnode.componentInstance &&
+      !vnode.componentInstance._isDestroyed &&
+      vnode.data.keepAlive
+    ) {
+      // kept-alive components, treat as a patch
+      var mountedNode = vnode; // work around flow
+      componentVNodeHooks.prepatch(mountedNode, mountedNode);
+    } else {
+      var child = vnode.componentInstance = createComponentInstanceForVnode(
+        vnode,
+        activeInstance
+      );
+      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
+    }
+  },
+
+  prepatch: function prepatch (oldVnode, vnode) {
+    var options = vnode.componentOptions;
+    var child = vnode.componentInstance = oldVnode.componentInstance;
+    updateChildComponent(
+      child,
+      options.propsData, // updated props
+      options.listeners, // updated listeners
+      vnode, // new parent vnode
+      options.children // new children
+    );
+  },
 
-/**
- * Scheduler job interface.
- * Will be called by the scheduler.
- */
-Watcher.prototype.run = function run () {
-  if (this.active) {
-    var value = this.get();
-    if (
-      value !== this.value ||
-      // Deep watchers and watchers on Object/Arrays should fire even
-      // when the value is the same, because the value may
-      // have mutated.
-      isObject(value) ||
-      this.deep
-    ) {
-      // set new value
-      var oldValue = this.value;
-      this.value = value;
-      if (this.user) {
-        try {
-          this.cb.call(this.vm, value, oldValue);
-        } catch (e) {
-          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
-        }
+  insert: function insert (vnode) {
+    var context = vnode.context;
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isMounted) {
+      componentInstance._isMounted = true;
+      callHook(componentInstance, 'mounted');
+    }
+    if (vnode.data.keepAlive) {
+      if (context._isMounted) {
+        // vue-router#1212
+        // During updates, a kept-alive component's child components may
+        // change, so directly walking the tree here may call activated hooks
+        // on incorrect children. Instead we push them into a queue which will
+        // be processed after the whole patch process ended.
+        queueActivatedComponent(componentInstance);
       } else {
-        this.cb.call(this.vm, value, oldValue);
+        activateChildComponent(componentInstance, true /* direct */);
       }
     }
-  }
-};
+  },
 
-/**
- * Evaluate the value of the watcher.
- * This only gets called for lazy watchers.
- */
-Watcher.prototype.evaluate = function evaluate () {
-  this.value = this.get();
-  this.dirty = false;
+  destroy: function destroy (vnode) {
+    var componentInstance = vnode.componentInstance;
+    if (!componentInstance._isDestroyed) {
+      if (!vnode.data.keepAlive) {
+        componentInstance.$destroy();
+      } else {
+        deactivateChildComponent(componentInstance, true /* direct */);
+      }
+    }
+  }
 };
 
-/**
- * Depend on all deps collected by this watcher.
- */
-Watcher.prototype.depend = function depend () {
-    var this$1 = this;
+var hooksToMerge = Object.keys(componentVNodeHooks);
 
-  var i = this.deps.length;
-  while (i--) {
-    this$1.deps[i].depend();
+function createComponent (
+  Ctor,
+  data,
+  context,
+  children,
+  tag
+) {
+  if (isUndef(Ctor)) {
+    return
   }
-};
 
-/**
- * Remove self from all dependencies' subscriber list.
- */
-Watcher.prototype.teardown = function teardown () {
-    var this$1 = this;
+  var baseCtor = context.$options._base;
 
-  if (this.active) {
-    // remove self from vm's watcher list
-    // this is a somewhat expensive operation so we skip it
-    // if the vm is being destroyed.
-    if (!this.vm._isBeingDestroyed) {
-      remove(this.vm._watchers, this);
-    }
-    var i = this.deps.length;
-    while (i--) {
-      this$1.deps[i].removeSub(this$1);
+  // plain options object: turn it into a constructor
+  if (isObject(Ctor)) {
+    Ctor = baseCtor.extend(Ctor);
+  }
+
+  // if at this stage it's not a constructor or an async component factory,
+  // reject.
+  if (typeof Ctor !== 'function') {
+    if (process.env.NODE_ENV !== 'production') {
+      warn(("Invalid Component definition: " + (String(Ctor))), context);
     }
-    this.active = false;
+    return
   }
-};
 
-/*  */
+  // async component
+  var asyncFactory;
+  if (isUndef(Ctor.cid)) {
+    asyncFactory = Ctor;
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor);
+    if (Ctor === undefined) {
+      // return a placeholder node for async component, which is rendered
+      // as a comment node but preserves all the raw information for the node.
+      // the information will be used for async server-rendering and hydration.
+      return createAsyncPlaceholder(
+        asyncFactory,
+        data,
+        context,
+        children,
+        tag
+      )
+    }
+  }
 
-var sharedPropertyDefinition = {
-  enumerable: true,
-  configurable: true,
-  get: noop,
-  set: noop
-};
+  data = data || {};
 
-function proxy (target, sourceKey, key) {
-  sharedPropertyDefinition.get = function proxyGetter () {
-    return this[sourceKey][key]
-  };
-  sharedPropertyDefinition.set = function proxySetter (val) {
-    this[sourceKey][key] = val;
-  };
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
+  // resolve constructor options in case global mixins are applied after
+  // component constructor creation
+  resolveConstructorOptions(Ctor);
 
-function initState (vm) {
-  vm._watchers = [];
-  vm._inlineComputed = null;
-  var opts = vm.$options;
-  if (opts.props) { initProps(vm, opts.props); }
-  if (opts.methods) { initMethods(vm, opts.methods); }
-  if (opts.data) {
-    initData(vm);
-  } else {
-    observe(vm._data = {}, true /* asRootData */);
+  // transform component v-model data into props & events
+  if (isDef(data.model)) {
+    transformModel(Ctor.options, data);
   }
-  if (opts.computed) { initComputed(vm, opts.computed); }
-  if (opts.watch && opts.watch !== nativeWatch) {
-    initWatch(vm, opts.watch);
+
+  // extract props
+  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
+
+  // functional component
+  if (isTrue(Ctor.options.functional)) {
+    return createFunctionalComponent(Ctor, propsData, data, context, children)
   }
-}
 
-function initProps (vm, propsOptions) {
-  var propsData = vm.$options.propsData || {};
-  var props = vm._props = {};
-  // cache prop keys so that future props updates can iterate using Array
-  // instead of dynamic object key enumeration.
-  var keys = vm.$options._propKeys = [];
-  var isRoot = !vm.$parent;
-  // root instance props should be converted
-  observerState.shouldConvert = isRoot;
-  var loop = function ( key ) {
-    keys.push(key);
-    var value = validateProp(key, propsOptions, propsData, vm);
-    /* istanbul ignore else */
-    if (process.env.NODE_ENV !== 'production') {
-      var hyphenatedKey = hyphenate(key);
-      if (isReservedAttribute(hyphenatedKey) ||
-          config.isReservedAttr(hyphenatedKey)) {
-        warn(
-          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
-          vm
-        );
-      }
-      defineReactive(props, key, value, function () {
-        if (vm.$parent && !isUpdatingChildComponent) {
-          warn(
-            "Avoid mutating a prop directly since the value will be " +
-            "overwritten whenever the parent component re-renders. " +
-            "Instead, use a data or computed property based on the prop's " +
-            "value. Prop being mutated: \"" + key + "\"",
-            vm
-          );
-        }
-      });
-    } else {
-      defineReactive(props, key, value);
-    }
-    // static props are already proxied on the component's prototype
-    // during Vue.extend(). We only need to proxy props defined at
-    // instantiation here.
-    if (!(key in vm)) {
-      proxy(vm, "_props", key);
-    }
-  };
+  // extract listeners, since these needs to be treated as
+  // child component listeners instead of DOM listeners
+  var listeners = data.on;
+  // replace with listeners with .native modifier
+  // so it gets processed during parent component patch.
+  data.on = data.nativeOn;
 
-  for (var key in propsOptions) loop( key );
-  observerState.shouldConvert = true;
-}
+  if (isTrue(Ctor.options.abstract)) {
+    // abstract components do not keep anything
+    // other than props & listeners & slot
 
-function initData (vm) {
-  var data = vm.$options.data;
-  data = vm._data = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (!isPlainObject(data)) {
+    // work around flow
+    var slot = data.slot;
     data = {};
-    process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
-      vm
-    );
-  }
-  // proxy data on instance
-  var keys = Object.keys(data);
-  var props = vm.$options.props;
-  var methods = vm.$options.methods;
-  var i = keys.length;
-  while (i--) {
-    var key = keys[i];
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods && hasOwn(methods, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a data property."),
-          vm
-        );
-      }
-    }
-    if (props && hasOwn(props, key)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "The data property \"" + key + "\" is already declared as a prop. " +
-        "Use prop default value instead.",
-        vm
-      );
-    } else if (!isReserved(key)) {
-      proxy(vm, "_data", key);
+    if (slot) {
+      data.slot = slot;
     }
   }
-  // observe data
-  observe(data, true /* asRootData */);
+
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data);
+
+  // return a placeholder vnode
+  var name = Ctor.options.name || tag;
+  var vnode = new VNode(
+    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
+    data, undefined, undefined, undefined, context,
+    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
+    asyncFactory
+  );
+
+  // Weex specific: invoke recycle-list optimized @render function for
+  // extracting cell-slot template.
+  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
+  /* istanbul ignore if */
+  if (isRecyclableComponent(vnode)) {
+    return renderRecyclableComponentTemplate(vnode)
+  }
+
+  return vnode
 }
 
-function getData (data, vm) {
-  try {
-    return data.call(vm, vm)
-  } catch (e) {
-    handleError(e, vm, "data()");
-    return {}
+function createComponentInstanceForVnode (
+  vnode, // we know it's MountedComponentVNode but flow doesn't
+  parent // activeInstance in lifecycle state
+) {
+  var options = {
+    _isComponent: true,
+    _parentVnode: vnode,
+    parent: parent
+  };
+  // check inline-template render functions
+  var inlineTemplate = vnode.data.inlineTemplate;
+  if (isDef(inlineTemplate)) {
+    options.render = inlineTemplate.render;
+    options.staticRenderFns = inlineTemplate.staticRenderFns;
   }
+  return new vnode.componentOptions.Ctor(options)
 }
 
-var computedWatcherOptions = { lazy: true };
+function installComponentHooks (data) {
+  var hooks = data.hook || (data.hook = {});
+  for (var i = 0; i < hooksToMerge.length; i++) {
+    var key = hooksToMerge[i];
+    var existing = hooks[key];
+    var toMerge = componentVNodeHooks[key];
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
+    }
+  }
+}
 
-function initComputed (vm, computed) {
-  // $flow-disable-line
-  var watchers = vm._computedWatchers = Object.create(null);
-  // computed properties are just getters during SSR
-  var isSSR = isServerRendering();
+function mergeHook$1 (f1, f2) {
+  var merged = function (a, b) {
+    // flow complains about extra args which is why we use any
+    f1(a, b);
+    f2(a, b);
+  };
+  merged._merged = true;
+  return merged
+}
 
-  for (var key in computed) {
-    var userDef = computed[key];
-    var getter = typeof userDef === 'function' ? userDef : userDef.get;
-    if (process.env.NODE_ENV !== 'production' && getter == null) {
-      warn(
-        ("Getter is missing for computed property \"" + key + "\"."),
-        vm
-      );
+// transform component v-model info (value and callback) into
+// prop and event handler respectively.
+function transformModel (options, data) {
+  var prop = (options.model && options.model.prop) || 'value';
+  var event = (options.model && options.model.event) || 'input'
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value;
+  var on = data.on || (data.on = {});
+  var existing = on[event];
+  var callback = data.model.callback;
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing);
     }
+  } else {
+    on[event] = callback;
+  }
+}
 
-    if (!isSSR) {
-      // create internal watcher for the computed property.
-      watchers[key] = new Watcher(
-        vm,
-        getter || noop,
-        noop,
-        computedWatcherOptions
-      );
-    }
+/*  */
 
-    // component-defined computed properties are already defined on the
-    // component prototype. We only need to define computed properties defined
-    // at instantiation here.
-    if (!(key in vm)) {
-      defineComputed(vm, key, userDef);
-    } else if (process.env.NODE_ENV !== 'production') {
-      if (key in vm.$data) {
-        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
-      } else if (vm.$options.props && key in vm.$options.props) {
-        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
-      }
-    }
+var SIMPLE_NORMALIZE = 1;
+var ALWAYS_NORMALIZE = 2;
+
+// wrapper function for providing a more flexible interface
+// without getting yelled at by flow
+function createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType,
+  alwaysNormalize
+) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    normalizationType = children;
+    children = data;
+    data = undefined;
   }
+  if (isTrue(alwaysNormalize)) {
+    normalizationType = ALWAYS_NORMALIZE;
+  }
+  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function defineComputed (
-  target,
-  key,
-  userDef
+function _createElement (
+  context,
+  tag,
+  data,
+  children,
+  normalizationType
 ) {
-  var shouldCache = !isServerRendering();
-  if (typeof userDef === 'function') {
-    sharedPropertyDefinition.get = shouldCache
-      ? createComputedGetter(key)
-      : userDef;
-    sharedPropertyDefinition.set = noop;
-  } else {
-    sharedPropertyDefinition.get = userDef.get
-      ? shouldCache && userDef.cache !== false
-        ? createComputedGetter(key)
-        : userDef.get
-      : noop;
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
-      : noop;
+  if (isDef(data) && isDef((data).__ob__)) {
+    process.env.NODE_ENV !== 'production' && warn(
+      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
+      'Always create fresh vnode data objects in each render!',
+      context
+    );
+    return createEmptyVNode()
   }
+  // object syntax in v-bind
+  if (isDef(data) && isDef(data.is)) {
+    tag = data.is;
+  }
+  if (!tag) {
+    // in case of component :is set to falsy value
+    return createEmptyVNode()
+  }
+  // warn against non-primitive key
   if (process.env.NODE_ENV !== 'production' &&
-      sharedPropertyDefinition.set === noop) {
-    sharedPropertyDefinition.set = function () {
+    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
+  ) {
+    if (!('@binding' in data.key)) {
       warn(
-        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
-        this
+        'Avoid using non-primitive value as key, ' +
+        'use string/number value instead.',
+        context
       );
-    };
-  }
-  Object.defineProperty(target, key, sharedPropertyDefinition);
-}
-
-function createComputedGetter (key) {
-  return function computedGetter () {
-    var watcher = this._computedWatchers && this._computedWatchers[key];
-    if (watcher) {
-      if (watcher.dirty) {
-        watcher.evaluate();
-      }
-      if (Dep.target) {
-        watcher.depend();
-      }
-      return watcher.value
     }
   }
-}
-
-function initMethods (vm, methods) {
-  var props = vm.$options.props;
-  for (var key in methods) {
-    if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
-        warn(
-          "Method \"" + key + "\" has an undefined value in the component definition. " +
-          "Did you reference the function correctly?",
-          vm
-        );
-      }
-      if (props && hasOwn(props, key)) {
-        warn(
-          ("Method \"" + key + "\" has already been defined as a prop."),
-          vm
-        );
-      }
-      if ((key in vm) && isReserved(key)) {
+  // support single function children as default scoped slot
+  if (Array.isArray(children) &&
+    typeof children[0] === 'function'
+  ) {
+    data = data || {};
+    data.scopedSlots = { default: children[0] };
+    children.length = 0;
+  }
+  if (normalizationType === ALWAYS_NORMALIZE) {
+    children = normalizeChildren(children);
+  } else if (normalizationType === SIMPLE_NORMALIZE) {
+    children = simpleNormalizeChildren(children);
+  }
+  var vnode, ns;
+  if (typeof tag === 'string') {
+    var Ctor;
+    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
+    if (config.isReservedTag(tag)) {
+      // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn)) {
         warn(
-          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
-          "Avoid defining component methods that start with _ or $."
+          ("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">."),
+          context
         );
       }
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+      // component
+      vnode = createComponent(Ctor, data, context, children, tag);
+    } else {
+      // unknown or unlisted namespaced elements
+      // check at runtime because it may get assigned a namespace when its
+      // parent normalizes children
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm);
+  } else {
+    // direct component options / constructor
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (Array.isArray(vnode)) {
+    return vnode
+  } else if (isDef(vnode)) {
+    if (isDef(ns)) { applyNS(vnode, ns); }
+    if (isDef(data)) { registerDeepBindings(data); }
+    return vnode
+  } else {
+    return createEmptyVNode()
   }
 }
 
-function initWatch (vm, watch) {
-  for (var key in watch) {
-    var handler = watch[key];
-    if (Array.isArray(handler)) {
-      for (var i = 0; i < handler.length; i++) {
-        createWatcher(vm, key, handler[i]);
+function applyNS (vnode, ns, force) {
+  vnode.ns = ns;
+  if (vnode.tag === 'foreignObject') {
+    // use default namespace inside foreignObject
+    ns = undefined;
+    force = true;
+  }
+  if (isDef(vnode.children)) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (isDef(child.tag) && (
+        isUndef(child.ns) || (isTrue(force) && child.tag !== 'svg'))) {
+        applyNS(child, ns, force);
       }
-    } else {
-      createWatcher(vm, key, handler);
     }
   }
 }
 
-function createWatcher (
-  vm,
-  keyOrFn,
-  handler,
-  options
-) {
-  if (isPlainObject(handler)) {
-    options = handler;
-    handler = handler.handler;
+// ref #5318
+// necessary to ensure parent re-render when deep bindings like :style and
+// :class are used on slot nodes
+function registerDeepBindings (data) {
+  if (isObject(data.style)) {
+    traverse(data.style);
   }
-  if (typeof handler === 'string') {
-    handler = vm[handler];
+  if (isObject(data.class)) {
+    traverse(data.class);
   }
-  return vm.$watch(keyOrFn, handler, options)
 }
 
-function stateMixin (Vue) {
-  // flow somehow has problems with directly declared definition object
-  // when using Object.defineProperty, so we have to procedurally build up
-  // the object here.
-  var dataDef = {};
-  dataDef.get = function () { return this._data };
-  var propsDef = {};
-  propsDef.get = function () { return this._props };
+/*  */
+
+function initRender (vm) {
+  vm._vnode = null; // the root of the child tree
+  vm._staticTrees = null; // v-once cached trees
+  var options = vm.$options;
+  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
+  var renderContext = parentVnode && parentVnode.context;
+  vm.$slots = resolveSlots(options._renderChildren, renderContext);
+  vm.$scopedSlots = emptyObject;
+  // bind the createElement fn to this instance
+  // so that we get proper render context inside it.
+  // args order: tag, data, children, normalizationType, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
+
+  // $attrs & $listeners are exposed for easier HOC creation.
+  // they need to be reactive so that HOCs using them are always updated
+  var parentData = parentVnode && parentVnode.data;
+
+  /* istanbul ignore else */
   if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData) {
-      warn(
-        'Avoid replacing instance root $data. ' +
-        'Use nested data properties instead.',
-        this
-      );
-    };
-    propsDef.set = function () {
-      warn("$props is readonly.", this);
-    };
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
+    }, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
+      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
+    }, true);
+  } else {
+    defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
+    defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, null, true);
   }
-  Object.defineProperty(Vue.prototype, '$data', dataDef);
-  Object.defineProperty(Vue.prototype, '$props', propsDef);
+}
 
-  Vue.prototype.$set = set;
-  Vue.prototype.$delete = del;
+var currentRenderingInstance = null;
 
-  Vue.prototype.$watch = function (
-    expOrFn,
-    cb,
-    options
-  ) {
+function renderMixin (Vue) {
+  // install runtime convenience helpers
+  installRenderHelpers(Vue.prototype);
+
+  Vue.prototype.$nextTick = function (fn) {
+    return nextTick(fn, this)
+  };
+
+  Vue.prototype._render = function () {
     var vm = this;
-    if (isPlainObject(cb)) {
-      return createWatcher(vm, expOrFn, cb, options)
+    var ref = vm.$options;
+    var render = ref.render;
+    var _parentVnode = ref._parentVnode;
+
+    if (_parentVnode) {
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      );
     }
-    options = options || {};
-    options.user = true;
-    var watcher = new Watcher(vm, expOrFn, cb, options);
-    if (options.immediate) {
-      cb.call(vm, watcher.value);
+
+    // set parent vnode. this allows render functions to have access
+    // to the data on the placeholder node.
+    vm.$vnode = _parentVnode;
+    // render self
+    var vnode;
+    try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm;
+      vnode = render.call(vm._renderProxy, vm.$createElement);
+    } catch (e) {
+      handleError(e, vm, "render");
+      // return error render result,
+      // or previous vnode to prevent render error causing blank component
+      /* istanbul ignore else */
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
+        } catch (e) {
+          handleError(e, vm, "renderError");
+          vnode = vm._vnode;
+        }
+      } else {
+        vnode = vm._vnode;
+      }
+    } finally {
+      currentRenderingInstance = null;
     }
-    return function unwatchFn () {
-      watcher.teardown();
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0];
+    }
+    // return empty vnode in case the render function errored out
+    if (!(vnode instanceof VNode)) {
+      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
+        warn(
+          'Multiple root nodes returned from render function. Render function ' +
+          'should return a single root node.',
+          vm
+        );
+      }
+      vnode = createEmptyVNode();
     }
+    // set parent
+    vnode.parent = _parentVnode;
+    return vnode
   };
 }
 
 /*  */
 
-function initProvide (vm) {
-  var provide = vm.$options.provide;
-  if (provide) {
-    vm._provided = typeof provide === 'function'
-      ? provide.call(vm)
-      : provide;
+function ensureCtor (comp, base) {
+  if (
+    comp.__esModule ||
+    (hasSymbol && comp[Symbol.toStringTag] === 'Module')
+  ) {
+    comp = comp.default;
   }
+  return isObject(comp)
+    ? base.extend(comp)
+    : comp
 }
 
-function initInjections (vm) {
-  var result = resolveInject(vm.$options.inject, vm);
-  if (result) {
-    observerState.shouldConvert = false;
-    Object.keys(result).forEach(function (key) {
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        defineReactive(vm, key, result[key], function () {
-          warn(
-            "Avoid mutating an injected value directly since the changes will be " +
-            "overwritten whenever the provided component re-renders. " +
-            "injection being mutated: \"" + key + "\"",
-            vm
-          );
-        });
+function createAsyncPlaceholder (
+  factory,
+  data,
+  context,
+  children,
+  tag
+) {
+  var node = createEmptyVNode();
+  node.asyncFactory = factory;
+  node.asyncMeta = { data: data, context: context, children: children, tag: tag };
+  return node
+}
+
+function resolveAsyncComponent (
+  factory,
+  baseCtor
+) {
+  if (isTrue(factory.error) && isDef(factory.errorComp)) {
+    return factory.errorComp
+  }
+
+  if (isDef(factory.resolved)) {
+    return factory.resolved
+  }
+
+  var owner = currentRenderingInstance;
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner);
+  }
+
+  if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
+    return factory.loadingComp
+  }
+
+  if (owner && !isDef(factory.owners)) {
+    var owners = factory.owners = [owner];
+    var sync = true;
+    var timerLoading = null;
+    var timerTimeout = null
+
+    ;(owner).$on('hook:destroyed', function () { return remove(owners, owner); });
+
+    var forceRender = function (renderCompleted) {
+      for (var i = 0, l = owners.length; i < l; i++) {
+        (owners[i]).$forceUpdate();
+      }
+
+      if (renderCompleted) {
+        owners.length = 0;
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading);
+          timerLoading = null;
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout);
+          timerTimeout = null;
+        }
+      }
+    };
+
+    var resolve = once(function (res) {
+      // cache resolved
+      factory.resolved = ensureCtor(res, baseCtor);
+      // invoke callbacks only if this is not a synchronous resolve
+      // (async resolves are shimmed as synchronous during SSR)
+      if (!sync) {
+        forceRender(true);
       } else {
-        defineReactive(vm, key, result[key]);
+        owners.length = 0;
       }
     });
-    observerState.shouldConvert = true;
-  }
-}
 
-function resolveInject (inject, vm) {
-  if (inject) {
-    // inject is :any because flow is not smart enough to figure out cached
-    var result = Object.create(null);
-    var keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(function (key) {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
-      : Object.keys(inject);
+    var reject = once(function (reason) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed to resolve async component: " + (String(factory)) +
+        (reason ? ("\nReason: " + reason) : '')
+      );
+      if (isDef(factory.errorComp)) {
+        factory.error = true;
+        forceRender(true);
+      }
+    });
 
-    for (var i = 0; i < keys.length; i++) {
-      var key = keys[i];
-      var provideKey = inject[key].from;
-      var source = vm;
-      while (source) {
-        if (source._provided && provideKey in source._provided) {
-          result[key] = source._provided[provideKey];
-          break
+    var res = factory(resolve, reject);
+
+    if (isObject(res)) {
+      if (isPromise(res)) {
+        // () => Promise
+        if (isUndef(factory.resolved)) {
+          res.then(resolve, reject);
         }
-        source = source.$parent;
-      }
-      if (!source) {
-        if ('default' in inject[key]) {
-          var provideDefault = inject[key].default;
-          result[key] = typeof provideDefault === 'function'
-            ? provideDefault.call(vm)
-            : provideDefault;
-        } else if (process.env.NODE_ENV !== 'production') {
-          warn(("Injection \"" + key + "\" not found"), vm);
+      } else if (isPromise(res.component)) {
+        res.component.then(resolve, reject);
+
+        if (isDef(res.error)) {
+          factory.errorComp = ensureCtor(res.error, baseCtor);
+        }
+
+        if (isDef(res.loading)) {
+          factory.loadingComp = ensureCtor(res.loading, baseCtor);
+          if (res.delay === 0) {
+            factory.loading = true;
+          } else {
+            timerLoading = setTimeout(function () {
+              timerLoading = null;
+              if (isUndef(factory.resolved) && isUndef(factory.error)) {
+                factory.loading = true;
+                forceRender(false);
+              }
+            }, res.delay || 200);
+          }
+        }
+
+        if (isDef(res.timeout)) {
+          timerTimeout = setTimeout(function () {
+            timerTimeout = null;
+            if (isUndef(factory.resolved)) {
+              reject(
+                process.env.NODE_ENV !== 'production'
+                  ? ("timeout (" + (res.timeout) + "ms)")
+                  : null
+              );
+            }
+          }, res.timeout);
         }
       }
     }
-    return result
+
+    sync = false;
+    // return in case resolved synchronously
+    return factory.loading
+      ? factory.loadingComp
+      : factory.resolved
   }
 }
 
 /*  */
 
-/**
- * Runtime helper for rendering v-for lists.
- */
-function renderList (
-  val,
-  render
-) {
-  var ret, i, l, keys, key;
-  if (Array.isArray(val) || typeof val === 'string') {
-    ret = new Array(val.length);
-    for (i = 0, l = val.length; i < l; i++) {
-      ret[i] = render(val[i], i);
-    }
-  } else if (typeof val === 'number') {
-    ret = new Array(val);
-    for (i = 0; i < val; i++) {
-      ret[i] = render(i + 1, i);
-    }
-  } else if (isObject(val)) {
-    keys = Object.keys(val);
-    ret = new Array(keys.length);
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i];
-      ret[i] = render(val[key], key, i);
-    }
-  }
-  if (isDef(ret)) {
-    (ret)._isVList = true;
-  }
-  return ret
+function isAsyncPlaceholder (node) {
+  return node.isComment && node.asyncFactory
 }
 
 /*  */
 
-/**
- * Runtime helper for rendering <slot>
- */
-function renderSlot (
-  name,
-  fallback,
-  props,
-  bindObject
-) {
-  var scopedSlotFn = this.$scopedSlots[name];
-  var nodes;
-  if (scopedSlotFn) { // scoped slot
-    props = props || {};
-    if (bindObject) {
-      if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        );
-      }
-      props = extend(extend({}, bindObject), props);
-    }
-    nodes = scopedSlotFn(props) || fallback;
-  } else {
-    var slotNodes = this.$slots[name];
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
-        warn(
-          "Duplicate presence of slot \"" + name + "\" found in the same render tree " +
-          "- this will likely cause render errors.",
-          this
-        );
+function getFirstComponentChild (children) {
+  if (Array.isArray(children)) {
+    for (var i = 0; i < children.length; i++) {
+      var c = children[i];
+      if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
+        return c
       }
-      slotNodes._rendered = true;
     }
-    nodes = slotNodes || fallback;
-  }
-
-  var target = props && props.slot;
-  if (target) {
-    return this.$createElement('template', { slot: target }, nodes)
-  } else {
-    return nodes
   }
 }
 
 /*  */
 
-/**
- * Runtime helper for resolving filters
- */
-function resolveFilter (id) {
-  return resolveAsset(this.$options, 'filters', id, true) || identity
-}
-
 /*  */
 
-/**
- * Runtime helper for checking keyCodes from config.
- * exposed as Vue.prototype._k
- * passing in eventKeyName as last argument separately for backwards compat
- */
-function checkKeyCodes (
-  eventKeyCode,
-  key,
-  builtInAlias,
-  eventKeyName
-) {
-  var keyCodes = config.keyCodes[key] || builtInAlias;
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
-  } else if (eventKeyName) {
-    return hyphenate(eventKeyName) !== key
+function initEvents (vm) {
+  vm._events = Object.create(null);
+  vm._hasHookEvent = false;
+  // init parent attached events
+  var listeners = vm.$options._parentListeners;
+  if (listeners) {
+    updateComponentListeners(vm, listeners);
   }
 }
 
-/*  */
+var target;
 
-/**
- * Runtime helper for merging v-bind="object" into a VNode's data.
- */
-function bindObjectProps (
-  data,
-  tag,
-  value,
-  asProp,
-  isSync
-) {
-  if (value) {
-    if (!isObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-bind without argument expects an Object or Array value',
-        this
-      );
-    } else {
-      if (Array.isArray(value)) {
-        value = toObject(value);
-      }
-      var hash;
-      var loop = function ( key ) {
-        if (
-          key === 'class' ||
-          key === 'style' ||
-          isReservedAttribute(key)
-        ) {
-          hash = data;
-        } else {
-          var type = data.attrs && data.attrs.type;
-          hash = asProp || config.mustUseProp(tag, type, key)
-            ? data.domProps || (data.domProps = {})
-            : data.attrs || (data.attrs = {});
-        }
-        if (!(key in hash)) {
-          hash[key] = value[key];
+function add (event, fn) {
+  target.$on(event, fn);
+}
 
-          if (isSync) {
-            var on = data.on || (data.on = {});
-            on[("update:" + key)] = function ($event) {
-              value[key] = $event;
-            };
-          }
-        }
-      };
+function remove$1 (event, fn) {
+  target.$off(event, fn);
+}
 
-      for (var key in value) loop( key );
+function createOnceHandler (event, fn) {
+  var _target = target;
+  return function onceHandler () {
+    var res = fn.apply(null, arguments);
+    if (res !== null) {
+      _target.$off(event, onceHandler);
     }
   }
-  return data
 }
 
-/*  */
-
-/**
- * Runtime helper for rendering static trees.
- */
-function renderStatic (
-  index,
-  isInFor
+function updateComponentListeners (
+  vm,
+  listeners,
+  oldListeners
 ) {
-  var cached = this._staticTrees || (this._staticTrees = []);
-  var tree = cached[index];
-  // if has already-rendered static tree and not inside v-for,
-  // we can reuse the same tree by doing a shallow clone.
-  if (tree && !isInFor) {
-    return Array.isArray(tree)
-      ? cloneVNodes(tree)
-      : cloneVNode(tree)
-  }
-  // otherwise, render a fresh tree.
-  tree = cached[index] = this.$options.staticRenderFns[index].call(
-    this._renderProxy,
-    null,
-    this // for render fns generated for functional component templates
-  );
-  markStatic(tree, ("__static__" + index), false);
-  return tree
+  target = vm;
+  updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
+  target = undefined;
 }
 
-/**
- * Runtime helper for v-once.
- * Effectively it means marking the node as static with a unique key.
- */
-function markOnce (
-  tree,
-  index,
-  key
-) {
-  markStatic(tree, ("__once__" + index + (key ? ("_" + key) : "")), true);
-  return tree
-}
+function eventsMixin (Vue) {
+  var hookRE = /^hook:/;
+  Vue.prototype.$on = function (event, fn) {
+    var vm = this;
+    if (Array.isArray(event)) {
+      for (var i = 0, l = event.length; i < l; i++) {
+        vm.$on(event[i], fn);
+      }
+    } else {
+      (vm._events[event] || (vm._events[event] = [])).push(fn);
+      // optimize hook:event cost by using a boolean flag marked at registration
+      // instead of a hash lookup
+      if (hookRE.test(event)) {
+        vm._hasHookEvent = true;
+      }
+    }
+    return vm
+  };
 
-function markStatic (
-  tree,
-  key,
-  isOnce
-) {
-  if (Array.isArray(tree)) {
-    for (var i = 0; i < tree.length; i++) {
-      if (tree[i] && typeof tree[i] !== 'string') {
-        markStaticNode(tree[i], (key + "_" + i), isOnce);
+  Vue.prototype.$once = function (event, fn) {
+    var vm = this;
+    function on () {
+      vm.$off(event, on);
+      fn.apply(vm, arguments);
+    }
+    on.fn = fn;
+    vm.$on(event, on);
+    return vm
+  };
+
+  Vue.prototype.$off = function (event, fn) {
+    var vm = this;
+    // all
+    if (!arguments.length) {
+      vm._events = Object.create(null);
+      return vm
+    }
+    // array of events
+    if (Array.isArray(event)) {
+      for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
+        vm.$off(event[i$1], fn);
+      }
+      return vm
+    }
+    // specific event
+    var cbs = vm._events[event];
+    if (!cbs) {
+      return vm
+    }
+    if (!fn) {
+      vm._events[event] = null;
+      return vm
+    }
+    // specific handler
+    var cb;
+    var i = cbs.length;
+    while (i--) {
+      cb = cbs[i];
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1);
+        break
       }
     }
-  } else {
-    markStaticNode(tree, key, isOnce);
-  }
-}
+    return vm
+  };
 
-function markStaticNode (node, key, isOnce) {
-  node.isStatic = true;
-  node.key = key;
-  node.isOnce = isOnce;
+  Vue.prototype.$emit = function (event) {
+    var vm = this;
+    if (process.env.NODE_ENV !== 'production') {
+      var lowerCaseEvent = event.toLowerCase();
+      if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
+        tip(
+          "Event \"" + lowerCaseEvent + "\" is emitted in component " +
+          (formatComponentName(vm)) + " but the handler is registered for \"" + event + "\". " +
+          "Note that HTML attributes are case-insensitive and you cannot use " +
+          "v-on to listen to camelCase events when using in-DOM templates. " +
+          "You should probably use \"" + (hyphenate(event)) + "\" instead of \"" + event + "\"."
+        );
+      }
+    }
+    var cbs = vm._events[event];
+    if (cbs) {
+      cbs = cbs.length > 1 ? toArray(cbs) : cbs;
+      var args = toArray(arguments, 1);
+      var info = "event handler for \"" + event + "\"";
+      for (var i = 0, l = cbs.length; i < l; i++) {
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info);
+      }
+    }
+    return vm
+  };
 }
 
 /*  */
 
-function bindObjectListeners (data, value) {
-  if (value) {
-    if (!isPlainObject(value)) {
-      process.env.NODE_ENV !== 'production' && warn(
-        'v-on without argument expects an Object value',
-        this
-      );
-    } else {
-      var on = data.on = data.on ? extend({}, data.on) : {};
-      for (var key in value) {
-        var existing = on[key];
-        var ours = value[key];
-        on[key] = existing ? [].concat(existing, ours) : ours;
-      }
-    }
+var activeInstance = null;
+var isUpdatingChildComponent = false;
+
+function setActiveInstance(vm) {
+  var prevActiveInstance = activeInstance;
+  activeInstance = vm;
+  return function () {
+    activeInstance = prevActiveInstance;
   }
-  return data
 }
 
-/*  */
+function initLifecycle (vm) {
+  var options = vm.$options;
 
-/**
- * This runtime helper creates an inline computed property for component
- * props that contain object or array literals. The caching ensures the same
- * object/array is returned unless the value has indeed changed, thus avoiding
- * the child component to always re-render when comparing props values.
- *
- * Installed to the instance as _a, requires special handling in parser that
- * transforms the following
- *   <foo :bar="{ a: 1 }"/>
- * to:
- *   <foo :bar="_a(0, function(){return { a: 1 }})"
- */
-function createInlineComputed (id, getter) {
-  var vm = this;
-  var watchers = vm._inlineComputed || (vm._inlineComputed = {});
-  var cached$$1 = watchers[id];
-  if (cached$$1) {
-    return cached$$1.value
-  } else {
-    watchers[id] = new Watcher(vm, getter, noop, { sync: true });
-    return watchers[id].value
+  // locate first non-abstract parent
+  var parent = options.parent;
+  if (parent && !options.abstract) {
+    while (parent.$options.abstract && parent.$parent) {
+      parent = parent.$parent;
+    }
+    parent.$children.push(vm);
   }
-}
 
-/*  */
+  vm.$parent = parent;
+  vm.$root = parent ? parent.$root : vm;
 
-function installRenderHelpers (target) {
-  target._o = markOnce;
-  target._n = toNumber;
-  target._s = toString;
-  target._l = renderList;
-  target._t = renderSlot;
-  target._q = looseEqual;
-  target._i = looseIndexOf;
-  target._m = renderStatic;
-  target._f = resolveFilter;
-  target._k = checkKeyCodes;
-  target._b = bindObjectProps;
-  target._v = createTextVNode;
-  target._e = createEmptyVNode;
-  target._u = resolveScopedSlots;
-  target._g = bindObjectListeners;
-  target._a = createInlineComputed;
+  vm.$children = [];
+  vm.$refs = {};
+
+  vm._watcher = null;
+  vm._inactive = null;
+  vm._directInactive = false;
+  vm._isMounted = false;
+  vm._isDestroyed = false;
+  vm._isBeingDestroyed = false;
 }
 
-/*  */
+function lifecycleMixin (Vue) {
+  Vue.prototype._update = function (vnode, hydrating) {
+    var vm = this;
+    var prevEl = vm.$el;
+    var prevVnode = vm._vnode;
+    var restoreActiveInstance = setActiveInstance(vm);
+    vm._vnode = vnode;
+    // Vue.prototype.__patch__ is injected in entry points
+    // based on the rendering backend used.
+    if (!prevVnode) {
+      // initial render
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */);
+    } else {
+      // updates
+      vm.$el = vm.__patch__(prevVnode, vnode);
+    }
+    restoreActiveInstance();
+    // update __vue__ reference
+    if (prevEl) {
+      prevEl.__vue__ = null;
+    }
+    if (vm.$el) {
+      vm.$el.__vue__ = vm;
+    }
+    // if parent is an HOC, update its $el as well
+    if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
+      vm.$parent.$el = vm.$el;
+    }
+    // updated hook is called by the scheduler to ensure that children are
+    // updated in a parent's updated hook.
+  };
 
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
-) {
-  var options = Ctor.options;
-  this.data = data;
-  this.props = props;
-  this.children = children;
-  this.parent = parent;
-  this.listeners = data.on || emptyObject;
-  this.injections = resolveInject(options.inject, parent);
-  this.slots = function () { return resolveSlots(children, parent); };
+  Vue.prototype.$forceUpdate = function () {
+    var vm = this;
+    if (vm._watcher) {
+      vm._watcher.update();
+    }
+  };
 
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  var contextVm = Object.create(parent);
-  var isCompiled = isTrue(options._compiled);
-  var needNormalization = !isCompiled;
+  Vue.prototype.$destroy = function () {
+    var vm = this;
+    if (vm._isBeingDestroyed) {
+      return
+    }
+    callHook(vm, 'beforeDestroy');
+    vm._isBeingDestroyed = true;
+    // remove self from parent
+    var parent = vm.$parent;
+    if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
+      remove(parent.$children, vm);
+    }
+    // teardown watchers
+    if (vm._watcher) {
+      vm._watcher.teardown();
+    }
+    var i = vm._watchers.length;
+    while (i--) {
+      vm._watchers[i].teardown();
+    }
+    // remove reference from data ob
+    // frozen object may not have observer.
+    if (vm._data.__ob__) {
+      vm._data.__ob__.vmCount--;
+    }
+    // call the last hook...
+    vm._isDestroyed = true;
+    // invoke destroy hooks on current rendered tree
+    vm.__patch__(vm._vnode, null);
+    // fire destroyed hook
+    callHook(vm, 'destroyed');
+    // turn off all instance listeners.
+    vm.$off();
+    // remove __vue__ reference
+    if (vm.$el) {
+      vm.$el.__vue__ = null;
+    }
+    // release circular reference (#6759)
+    if (vm.$vnode) {
+      vm.$vnode.parent = null;
+    }
+  };
+}
 
-  // support for compiled functional template
-  if (isCompiled) {
-    // exposing $options for renderStatic()
-    this.$options = options;
-    // pre-resolve slots for renderSlot()
-    this.$slots = this.slots();
-    this.$scopedSlots = data.scopedSlots || emptyObject;
+function mountComponent (
+  vm,
+  el,
+  hydrating
+) {
+  vm.$el = el;
+  if (!vm.$options.render) {
+    vm.$options.render = createEmptyVNode;
+    if (process.env.NODE_ENV !== 'production') {
+      /* istanbul ignore if */
+      if ((vm.$options.template && vm.$options.template.charAt(0) !== '#') ||
+        vm.$options.el || el) {
+        warn(
+          'You are using the runtime-only build of Vue where the template ' +
+          'compiler is not available. Either pre-compile the templates into ' +
+          'render functions, or use the compiler-included build.',
+          vm
+        );
+      } else {
+        warn(
+          'Failed to mount component: template or render function not defined.',
+          vm
+        );
+      }
+    }
   }
+  callHook(vm, 'beforeMount');
 
-  if (options._scopeId) {
-    this._c = function (a, b, c, d) {
-      var vnode = createElement(contextVm, a, b, c, d, needNormalization);
-      if (vnode) {
-        vnode.fnScopeId = options._scopeId;
-        vnode.fnContext = parent;
-      }
-      return vnode
+  var updateComponent;
+  /* istanbul ignore if */
+  if (process.env.NODE_ENV !== 'production' && config.performance && mark) {
+    updateComponent = function () {
+      var name = vm._name;
+      var id = vm._uid;
+      var startTag = "vue-perf-start:" + id;
+      var endTag = "vue-perf-end:" + id;
+
+      mark(startTag);
+      var vnode = vm._render();
+      mark(endTag);
+      measure(("vue " + name + " render"), startTag, endTag);
+
+      mark(startTag);
+      vm._update(vnode, hydrating);
+      mark(endTag);
+      measure(("vue " + name + " patch"), startTag, endTag);
     };
   } else {
-    this._c = function (a, b, c, d) { return createElement(contextVm, a, b, c, d, needNormalization); };
+    updateComponent = function () {
+      vm._update(vm._render(), hydrating);
+    };
   }
-}
 
-installRenderHelpers(FunctionalRenderContext.prototype);
+  // we set this to vm._watcher inside the watcher's constructor
+  // since the watcher's initial patch may call $forceUpdate (e.g. inside child
+  // component's mounted hook), which relies on vm._watcher being already defined
+  new Watcher(vm, updateComponent, noop, {
+    before: function before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate');
+      }
+    }
+  }, true /* isRenderWatcher */);
+  hydrating = false;
 
-function createFunctionalComponent (
-  Ctor,
+  // manually mounted instance, call mounted on self
+  // mounted is called for render-created child components in its inserted hook
+  if (vm.$vnode == null) {
+    vm._isMounted = true;
+    callHook(vm, 'mounted');
+  }
+  return vm
+}
+
+function updateChildComponent (
+  vm,
   propsData,
-  data,
-  contextVm,
-  children
+  listeners,
+  parentVnode,
+  renderChildren
 ) {
-  var options = Ctor.options;
-  var props = {};
-  var propOptions = options.props;
-  if (isDef(propOptions)) {
-    for (var key in propOptions) {
-      props[key] = validateProp(key, propOptions, propsData || emptyObject);
-    }
-  } else {
-    if (isDef(data.attrs)) { mergeProps(props, data.attrs); }
-    if (isDef(data.props)) { mergeProps(props, data.props); }
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = true;
   }
 
-  var renderContext = new FunctionalRenderContext(
-    data,
-    props,
-    children,
-    contextVm,
-    Ctor
+  // determine whether component has slot children
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  var newScopedSlots = parentVnode.data.scopedSlots;
+  var oldScopedSlots = vm.$scopedSlots;
+  var hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key)
   );
 
-  var vnode = options.render.call(null, renderContext._c, renderContext);
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  var needsForceUpdate = !!(
+    renderChildren ||               // has new static slots
+    vm.$options._renderChildren ||  // has old static slots
+    hasDynamicScopedSlot
+  );
 
-  if (vnode instanceof VNode) {
-    vnode.fnContext = contextVm;
-    vnode.fnOptions = options;
-    if (data.slot) {
-      (vnode.data || (vnode.data = {})).slot = data.slot;
-    }
+  vm.$options._parentVnode = parentVnode;
+  vm.$vnode = parentVnode; // update vm's placeholder node without re-render
+
+  if (vm._vnode) { // update child tree's parent
+    vm._vnode.parent = parentVnode;
   }
+  vm.$options._renderChildren = renderChildren;
 
-  return vnode
-}
+  // update $attrs and $listeners hash
+  // these are also reactive so they may trigger child update if the child
+  // used them during render
+  vm.$attrs = parentVnode.data.attrs || emptyObject;
+  vm.$listeners = listeners || emptyObject;
 
-function mergeProps (to, from) {
-  for (var key in from) {
-    to[camelize(key)] = from[key];
+  // update props
+  if (propsData && vm.$options.props) {
+    toggleObserving(false);
+    var props = vm._props;
+    var propKeys = vm.$options._propKeys || [];
+    for (var i = 0; i < propKeys.length; i++) {
+      var key = propKeys[i];
+      var propOptions = vm.$options.props; // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm);
+    }
+    toggleObserving(true);
+    // keep a copy of raw propsData
+    vm.$options.propsData = propsData;
   }
-}
-
-/*  */
 
+  // update listeners
+  listeners = listeners || emptyObject;
+  var oldListeners = vm.$options._parentListeners;
+  vm.$options._parentListeners = listeners;
+  updateComponentListeners(vm, listeners, oldListeners);
 
-var RECYCLE_LIST_MARKER = '@inRecycleList';
+  // resolve slots + force update if has children
+  if (needsForceUpdate) {
+    vm.$slots = resolveSlots(renderChildren, parentVnode.context);
+    vm.$forceUpdate();
+  }
 
-// Register the component hook to weex native render engine.
-// The hook will be triggered by native, not javascript.
-function registerComponentHook (
-  componentId,
-  type, // hook type, could be "lifecycle" or "instance"
-  hook, // hook name
-  fn
-) {
-  if (!document || !document.taskCenter) {
-    warn("Can't find available \"document\" or \"taskCenter\".");
-    return
+  if (process.env.NODE_ENV !== 'production') {
+    isUpdatingChildComponent = false;
   }
-  if (typeof document.taskCenter.registerHook === 'function') {
-    return document.taskCenter.registerHook(componentId, type, hook, fn)
+}
+
+function isInInactiveTree (vm) {
+  while (vm && (vm = vm.$parent)) {
+    if (vm._inactive) { return true }
   }
-  warn(("Failed to register component hook \"" + type + "@" + hook + "#" + componentId + "\"."));
+  return false
 }
 
-// Updates the state of the component to weex native render engine.
-function updateComponentData (
-  componentId,
-  newData,
-  callback
-) {
-  if (!document || !document.taskCenter) {
-    warn("Can't find available \"document\" or \"taskCenter\".");
+function activateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = false;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  } else if (vm._directInactive) {
     return
   }
-  if (typeof document.taskCenter.updateData === 'function') {
-    return document.taskCenter.updateData(componentId, newData, callback)
+  if (vm._inactive || vm._inactive === null) {
+    vm._inactive = false;
+    for (var i = 0; i < vm.$children.length; i++) {
+      activateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'activated');
   }
-  warn(("Failed to update component data (" + componentId + ")."));
 }
 
-/*  */
-
-// https://github.com/Hanks10100/weex-native-directive/tree/master/component
+function deactivateChildComponent (vm, direct) {
+  if (direct) {
+    vm._directInactive = true;
+    if (isInInactiveTree(vm)) {
+      return
+    }
+  }
+  if (!vm._inactive) {
+    vm._inactive = true;
+    for (var i = 0; i < vm.$children.length; i++) {
+      deactivateChildComponent(vm.$children[i]);
+    }
+    callHook(vm, 'deactivated');
+  }
+}
 
-var uid$3 = 0;
+function callHook (vm, hook) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget();
+  var handlers = vm.$options[hook];
+  var info = hook + " hook";
+  if (handlers) {
+    for (var i = 0, j = handlers.length; i < j; i++) {
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
+    }
+  }
+  if (vm._hasHookEvent) {
+    vm.$emit('hook:' + hook);
+  }
+  popTarget();
+}
 
-// override Vue.prototype._init
-function initVirtualComponent (options) {
-  if ( options === void 0 ) options = {};
+/*  */
 
-  var vm = this;
-  var componentId = options.componentId;
+var MAX_UPDATE_COUNT = 100;
 
-  // virtual component uid
-  vm._uid = "virtual-component-" + (uid$3++);
+var queue = [];
+var activatedChildren = [];
+var has = {};
+var circular = {};
+var waiting = false;
+var flushing = false;
+var index = 0;
 
-  // a flag to avoid this being observed
-  vm._isVue = true;
-  // merge options
-  if (options && options._isComponent) {
-    // optimize internal component instantiation
-    // since dynamic options merging is pretty slow, and none of the
-    // internal component options needs special treatment.
-    initInternalComponent(vm, options);
-  } else {
-    vm.$options = mergeOptions(
-      resolveConstructorOptions(vm.constructor),
-      options || {},
-      vm
-    );
+/**
+ * Reset the scheduler's state.
+ */
+function resetSchedulerState () {
+  index = queue.length = activatedChildren.length = 0;
+  has = {};
+  if (process.env.NODE_ENV !== 'production') {
+    circular = {};
   }
+  waiting = flushing = false;
+}
 
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    initProxy(vm);
-  } else {
-    vm._renderProxy = vm;
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+var currentFlushTimestamp = 0;
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+var getNow = Date.now;
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  var performance = window.performance;
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = function () { return performance.now(); };
   }
+}
 
-  vm._self = vm;
-  initLifecycle(vm);
-  initEvents(vm);
-  initRender(vm);
-  callHook(vm, 'beforeCreate');
-  initInjections(vm); // resolve injections before data/props
-  initState(vm);
-  initProvide(vm); // resolve provide after data/props
-  callHook(vm, 'created');
+/**
+ * Flush both queues and run the watchers.
+ */
+function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow();
+  flushing = true;
+  var watcher, id;
 
-  // send initial data to native
-  var data = vm.$options.data;
-  var params = typeof data === 'function'
-    ? getData(data, vm)
-    : data || {};
-  if (isPlainObject(params)) {
-    updateComponentData(componentId, params);
+  // Sort queue before flush.
+  // This ensures that:
+  // 1. Components are updated from parent to child. (because parent is always
+  //    created before the child)
+  // 2. A component's user watchers are run before its render watcher (because
+  //    user watchers are created before the render watcher)
+  // 3. If a component is destroyed during a parent component's watcher run,
+  //    its watchers can be skipped.
+  queue.sort(function (a, b) { return a.id - b.id; });
+
+  // do not cache length because more watchers might be pushed
+  // as we run existing watchers
+  for (index = 0; index < queue.length; index++) {
+    watcher = queue[index];
+    if (watcher.before) {
+      watcher.before();
+    }
+    id = watcher.id;
+    has[id] = null;
+    watcher.run();
+    // in dev build, check and stop circular updates.
+    if (process.env.NODE_ENV !== 'production' && has[id] != null) {
+      circular[id] = (circular[id] || 0) + 1;
+      if (circular[id] > MAX_UPDATE_COUNT) {
+        warn(
+          'You may have an infinite update loop ' + (
+            watcher.user
+              ? ("in watcher with expression \"" + (watcher.expression) + "\"")
+              : "in a component render function."
+          ),
+          watcher.vm
+        );
+        break
+      }
+    }
   }
 
-  registerComponentHook(componentId, 'lifecycle', 'attach', function () {
-    callHook(vm, 'beforeMount');
+  // keep copies of post queues before resetting state
+  var activatedQueue = activatedChildren.slice();
+  var updatedQueue = queue.slice();
 
-    var updateComponent = function () {
-      vm._update(vm._vnode, false);
-    };
-    new Watcher(vm, updateComponent, noop, null, true);
+  resetSchedulerState();
 
-    vm._isMounted = true;
-    callHook(vm, 'mounted');
-  });
+  // call component updated and activated hooks
+  callActivatedHooks(activatedQueue);
+  callUpdatedHooks(updatedQueue);
 
-  registerComponentHook(componentId, 'lifecycle', 'detach', function () {
-    vm.$destroy();
-  });
+  // devtool hook
+  /* istanbul ignore if */
+  if (devtools && config.devtools) {
+    devtools.emit('flush');
+  }
 }
 
-// override Vue.prototype._update
-function updateVirtualComponent (vnode) {
-  var vm = this;
-  var componentId = vm.$options.componentId;
-  if (vm._isMounted) {
-    callHook(vm, 'beforeUpdate');
-  }
-  vm._vnode = vnode;
-  if (vm._isMounted && componentId) {
-    // TODO: data should be filtered and without bindings
-    var data = Object.assign({}, vm._data);
-    updateComponentData(componentId, data, function () {
+function callUpdatedHooks (queue) {
+  var i = queue.length;
+  while (i--) {
+    var watcher = queue[i];
+    var vm = watcher.vm;
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
       callHook(vm, 'updated');
-    });
+    }
   }
 }
 
-// listening on native callback
-function resolveVirtualComponent (vnode) {
-  var BaseCtor = vnode.componentOptions.Ctor;
-  var VirtualComponent = BaseCtor.extend({});
-  var cid = VirtualComponent.cid;
-  VirtualComponent.prototype._init = initVirtualComponent;
-  VirtualComponent.prototype._update = updateVirtualComponent;
+/**
+ * Queue a kept-alive component that was activated during patch.
+ * The queue will be processed after the entire tree has been patched.
+ */
+function queueActivatedComponent (vm) {
+  // setting _inactive to false here so that a render function can
+  // rely on checking whether it's in an inactive tree (e.g. router-view)
+  vm._inactive = false;
+  activatedChildren.push(vm);
+}
 
-  vnode.componentOptions.Ctor = BaseCtor.extend({
-    beforeCreate: function beforeCreate () {
-      // const vm: Component = this
+function callActivatedHooks (queue) {
+  for (var i = 0; i < queue.length; i++) {
+    queue[i]._inactive = true;
+    activateChildComponent(queue[i], true /* true */);
+  }
+}
 
-      // TODO: listen on all events and dispatch them to the
-      // corresponding virtual components according to the componentId.
-      // vm._virtualComponents = {}
-      var createVirtualComponent = function (componentId, propsData) {
-        // create virtual component
-        // const subVm =
-        new VirtualComponent({
-          componentId: componentId,
-          propsData: propsData
-        });
-        // if (vm._virtualComponents) {
-        //   vm._virtualComponents[componentId] = subVm
-        // }
-      };
+/**
+ * Push a watcher into the watcher queue.
+ * Jobs with duplicate IDs will be skipped unless it's
+ * pushed when the queue is being flushed.
+ */
+function queueWatcher (watcher) {
+  var id = watcher.id;
+  if (has[id] == null) {
+    has[id] = true;
+    if (!flushing) {
+      queue.push(watcher);
+    } else {
+      // if already flushing, splice the watcher based on its id
+      // if already past its id, it will be run next immediately.
+      var i = queue.length - 1;
+      while (i > index && queue[i].id > watcher.id) {
+        i--;
+      }
+      queue.splice(i + 1, 0, watcher);
+    }
+    // queue the flush
+    if (!waiting) {
+      waiting = true;
 
-      registerComponentHook(cid, 'lifecycle', 'create', createVirtualComponent);
-    },
-    beforeDestroy: function beforeDestroy () {
-      delete this._virtualComponents;
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue();
+        return
+      }
+      nextTick(flushSchedulerQueue);
     }
-  });
+  }
 }
 
 /*  */
 
-function isRecyclableComponent (vnode) {
-  return vnode.data.attrs
-    ? (RECYCLE_LIST_MARKER in vnode.data.attrs)
-    : false
-}
 
-function renderRecyclableComponentTemplate (vnode) {
-  // $flow-disable-line
-  delete vnode.data.attrs[RECYCLE_LIST_MARKER];
-  resolveVirtualComponent(vnode);
-  var vm = createComponentInstanceForVnode(vnode);
-  var render = (vm.$options)['@render'];
-  if (render) {
-    try {
-      return render.call(vm)
-    } catch (err) {
-      handleError(err, vm, "@render");
-    }
-  } else {
-    warn(
-      "@render function not defined on component used in <recycle-list>. " +
-      "Make sure to declare `recyclable=\"true\"` on the component's template.",
-      vm
-    );
-  }
-}
 
-/*  */
+var uid$2 = 0;
 
-// hooks to be invoked on component VNodes during patch
-var componentVNodeHooks = {
-  init: function init (
-    vnode,
-    hydrating,
-    parentElm,
-    refElm
-  ) {
-    if (!vnode.componentInstance || vnode.componentInstance._isDestroyed) {
-      var child = vnode.componentInstance = createComponentInstanceForVnode(
-        vnode,
-        activeInstance,
-        parentElm,
-        refElm
+/**
+ * A watcher parses an expression, collects dependencies,
+ * and fires callback when the expression value changes.
+ * This is used for both the $watch() api and directives.
+ */
+var Watcher = function Watcher (
+  vm,
+  expOrFn,
+  cb,
+  options,
+  isRenderWatcher
+) {
+  this.vm = vm;
+  if (isRenderWatcher) {
+    vm._watcher = this;
+  }
+  vm._watchers.push(this);
+  // options
+  if (options) {
+    this.deep = !!options.deep;
+    this.user = !!options.user;
+    this.lazy = !!options.lazy;
+    this.sync = !!options.sync;
+    this.before = options.before;
+  } else {
+    this.deep = this.user = this.lazy = this.sync = false;
+  }
+  this.cb = cb;
+  this.id = ++uid$2; // uid for batching
+  this.active = true;
+  this.dirty = this.lazy; // for lazy watchers
+  this.deps = [];
+  this.newDeps = [];
+  this.depIds = new _Set();
+  this.newDepIds = new _Set();
+  this.expression = process.env.NODE_ENV !== 'production'
+    ? expOrFn.toString()
+    : '';
+  // parse expression for getter
+  if (typeof expOrFn === 'function') {
+    this.getter = expOrFn;
+  } else {
+    this.getter = parsePath(expOrFn);
+    if (!this.getter) {
+      this.getter = noop;
+      process.env.NODE_ENV !== 'production' && warn(
+        "Failed watching path: \"" + expOrFn + "\" " +
+        'Watcher only accepts simple dot-delimited paths. ' +
+        'For full control, use a function instead.',
+        vm
       );
-      child.$mount(hydrating ? vnode.elm : undefined, hydrating);
-    } else if (vnode.data.keepAlive) {
-      // kept-alive components, treat as a patch
-      var mountedNode = vnode; // work around flow
-      componentVNodeHooks.prepatch(mountedNode, mountedNode);
     }
-  },
-
-  prepatch: function prepatch (oldVnode, vnode) {
-    var options = vnode.componentOptions;
-    var child = vnode.componentInstance = oldVnode.componentInstance;
-    updateChildComponent(
-      child,
-      options.propsData, // updated props
-      options.listeners, // updated listeners
-      vnode, // new parent vnode
-      options.children // new children
-    );
-  },
+  }
+  this.value = this.lazy
+    ? undefined
+    : this.get();
+};
 
-  insert: function insert (vnode) {
-    var context = vnode.context;
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isMounted) {
-      componentInstance._isMounted = true;
-      callHook(componentInstance, 'mounted');
-    }
-    if (vnode.data.keepAlive) {
-      if (context._isMounted) {
-        // vue-router#1212
-        // During updates, a kept-alive component's child components may
-        // change, so directly walking the tree here may call activated hooks
-        // on incorrect children. Instead we push them into a queue which will
-        // be processed after the whole patch process ended.
-        queueActivatedComponent(componentInstance);
-      } else {
-        activateChildComponent(componentInstance, true /* direct */);
-      }
+/**
+ * Evaluate the getter, and re-collect dependencies.
+ */
+Watcher.prototype.get = function get () {
+  pushTarget(this);
+  var value;
+  var vm = this.vm;
+  try {
+    value = this.getter.call(vm, vm);
+  } catch (e) {
+    if (this.user) {
+      handleError(e, vm, ("getter for watcher \"" + (this.expression) + "\""));
+    } else {
+      throw e
     }
-  },
-
-  destroy: function destroy (vnode) {
-    var componentInstance = vnode.componentInstance;
-    if (!componentInstance._isDestroyed) {
-      if (!vnode.data.keepAlive) {
-        componentInstance.$destroy();
-      } else {
-        deactivateChildComponent(componentInstance, true /* direct */);
-      }
+  } finally {
+    // "touch" every property so they are all tracked as
+    // dependencies for deep watching
+    if (this.deep) {
+      traverse(value);
     }
+    popTarget();
+    this.cleanupDeps();
   }
+  return value
 };
 
-var hooksToMerge = Object.keys(componentVNodeHooks);
-
-function createComponent (
-  Ctor,
-  data,
-  context,
-  children,
-  tag
-) {
-  if (isUndef(Ctor)) {
-    return
-  }
-
-  var baseCtor = context.$options._base;
-
-  // plain options object: turn it into a constructor
-  if (isObject(Ctor)) {
-    Ctor = baseCtor.extend(Ctor);
-  }
-
-  // if at this stage it's not a constructor or an async component factory,
-  // reject.
-  if (typeof Ctor !== 'function') {
-    if (process.env.NODE_ENV !== 'production') {
-      warn(("Invalid Component definition: " + (String(Ctor))), context);
+/**
+ * Add a dependency to this directive.
+ */
+Watcher.prototype.addDep = function addDep (dep) {
+  var id = dep.id;
+  if (!this.newDepIds.has(id)) {
+    this.newDepIds.add(id);
+    this.newDeps.push(dep);
+    if (!this.depIds.has(id)) {
+      dep.addSub(this);
     }
-    return
   }
+};
 
-  // async component
-  var asyncFactory;
-  if (isUndef(Ctor.cid)) {
-    asyncFactory = Ctor;
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context);
-    if (Ctor === undefined) {
-      // return a placeholder node for async component, which is rendered
-      // as a comment node but preserves all the raw information for the node.
-      // the information will be used for async server-rendering and hydration.
-      return createAsyncPlaceholder(
-        asyncFactory,
-        data,
-        context,
-        children,
-        tag
-      )
+/**
+ * Clean up for dependency collection.
+ */
+Watcher.prototype.cleanupDeps = function cleanupDeps () {
+  var i = this.deps.length;
+  while (i--) {
+    var dep = this.deps[i];
+    if (!this.newDepIds.has(dep.id)) {
+      dep.removeSub(this);
     }
   }
+  var tmp = this.depIds;
+  this.depIds = this.newDepIds;
+  this.newDepIds = tmp;
+  this.newDepIds.clear();
+  tmp = this.deps;
+  this.deps = this.newDeps;
+  this.newDeps = tmp;
+  this.newDeps.length = 0;
+};
 
-  data = data || {};
-
-  // resolve constructor options in case global mixins are applied after
-  // component constructor creation
-  resolveConstructorOptions(Ctor);
-
-  // transform component v-model data into props & events
-  if (isDef(data.model)) {
-    transformModel(Ctor.options, data);
+/**
+ * Subscriber interface.
+ * Will be called when a dependency changes.
+ */
+Watcher.prototype.update = function update () {
+  /* istanbul ignore else */
+  if (this.lazy) {
+    this.dirty = true;
+  } else if (this.sync) {
+    this.run();
+  } else {
+    queueWatcher(this);
   }
+};
 
-  // extract props
-  var propsData = extractPropsFromVNodeData(data, Ctor, tag);
-
-  // functional component
-  if (isTrue(Ctor.options.functional)) {
-    return createFunctionalComponent(Ctor, propsData, data, context, children)
+/**
+ * Scheduler job interface.
+ * Will be called by the scheduler.
+ */
+Watcher.prototype.run = function run () {
+  if (this.active) {
+    var value = this.get();
+    if (
+      value !== this.value ||
+      // Deep watchers and watchers on Object/Arrays should fire even
+      // when the value is the same, because the value may
+      // have mutated.
+      isObject(value) ||
+      this.deep
+    ) {
+      // set new value
+      var oldValue = this.value;
+      this.value = value;
+      if (this.user) {
+        try {
+          this.cb.call(this.vm, value, oldValue);
+        } catch (e) {
+          handleError(e, this.vm, ("callback for watcher \"" + (this.expression) + "\""));
+        }
+      } else {
+        this.cb.call(this.vm, value, oldValue);
+      }
+    }
   }
+};
 
-  // extract listeners, since these needs to be treated as
-  // child component listeners instead of DOM listeners
-  var listeners = data.on;
-  // replace with listeners with .native modifier
-  // so it gets processed during parent component patch.
-  data.on = data.nativeOn;
+/**
+ * Evaluate the value of the watcher.
+ * This only gets called for lazy watchers.
+ */
+Watcher.prototype.evaluate = function evaluate () {
+  this.value = this.get();
+  this.dirty = false;
+};
 
-  if (isTrue(Ctor.options.abstract)) {
-    // abstract components do not keep anything
-    // other than props & listeners & slot
+/**
+ * Depend on all deps collected by this watcher.
+ */
+Watcher.prototype.depend = function depend () {
+  var i = this.deps.length;
+  while (i--) {
+    this.deps[i].depend();
+  }
+};
 
-    // work around flow
-    var slot = data.slot;
-    data = {};
-    if (slot) {
-      data.slot = slot;
+/**
+ * Remove self from all dependencies' subscriber list.
+ */
+Watcher.prototype.teardown = function teardown () {
+  if (this.active) {
+    // remove self from vm's watcher list
+    // this is a somewhat expensive operation so we skip it
+    // if the vm is being destroyed.
+    if (!this.vm._isBeingDestroyed) {
+      remove(this.vm._watchers, this);
+    }
+    var i = this.deps.length;
+    while (i--) {
+      this.deps[i].removeSub(this);
     }
+    this.active = false;
   }
+};
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data);
+/*  */
 
-  // return a placeholder vnode
-  var name = Ctor.options.name || tag;
-  var vnode = new VNode(
-    ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, context,
-    { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children },
-    asyncFactory
-  );
+var sharedPropertyDefinition = {
+  enumerable: true,
+  configurable: true,
+  get: noop,
+  set: noop
+};
 
-  // Weex specific: invoke recycle-list optimized @render function for
-  // extracting cell-slot template.
-  // https://github.com/Hanks10100/weex-native-directive/tree/master/component
-  /* istanbul ignore if */
-  if (true && isRecyclableComponent(vnode)) {
-    return renderRecyclableComponentTemplate(vnode)
-  }
+function proxy (target, sourceKey, key) {
+  sharedPropertyDefinition.get = function proxyGetter () {
+    return this[sourceKey][key]
+  };
+  sharedPropertyDefinition.set = function proxySetter (val) {
+    this[sourceKey][key] = val;
+  };
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
 
-  return vnode
+function initState (vm) {
+  vm._watchers = [];
+  var opts = vm.$options;
+  if (opts.props) { initProps(vm, opts.props); }
+  if (opts.methods) { initMethods(vm, opts.methods); }
+  if (opts.data) {
+    initData(vm);
+  } else {
+    observe(vm._data = {}, true /* asRootData */);
+  }
+  if (opts.computed) { initComputed(vm, opts.computed); }
+  if (opts.watch && opts.watch !== nativeWatch) {
+    initWatch(vm, opts.watch);
+  }
 }
 
-function createComponentInstanceForVnode (
-  vnode, // we know it's MountedComponentVNode but flow doesn't
-  parent, // activeInstance in lifecycle state
-  parentElm,
-  refElm
-) {
-  var options = {
-    _isComponent: true,
-    parent: parent,
-    _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
+function initProps (vm, propsOptions) {
+  var propsData = vm.$options.propsData || {};
+  var props = vm._props = {};
+  // cache prop keys so that future props updates can iterate using Array
+  // instead of dynamic object key enumeration.
+  var keys = vm.$options._propKeys = [];
+  var isRoot = !vm.$parent;
+  // root instance props should be converted
+  if (!isRoot) {
+    toggleObserving(false);
+  }
+  var loop = function ( key ) {
+    keys.push(key);
+    var value = validateProp(key, propsOptions, propsData, vm);
+    /* istanbul ignore else */
+    if (process.env.NODE_ENV !== 'production') {
+      var hyphenatedKey = hyphenate(key);
+      if (isReservedAttribute(hyphenatedKey) ||
+          config.isReservedAttr(hyphenatedKey)) {
+        warn(
+          ("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop."),
+          vm
+        );
+      }
+      defineReactive$$1(props, key, value, function () {
+        if (!isRoot && !isUpdatingChildComponent) {
+          warn(
+            "Avoid mutating a prop directly since the value will be " +
+            "overwritten whenever the parent component re-renders. " +
+            "Instead, use a data or computed property based on the prop's " +
+            "value. Prop being mutated: \"" + key + "\"",
+            vm
+          );
+        }
+      });
+    } else {
+      defineReactive$$1(props, key, value);
+    }
+    // static props are already proxied on the component's prototype
+    // during Vue.extend(). We only need to proxy props defined at
+    // instantiation here.
+    if (!(key in vm)) {
+      proxy(vm, "_props", key);
+    }
   };
-  // check inline-template render functions
-  var inlineTemplate = vnode.data.inlineTemplate;
-  if (isDef(inlineTemplate)) {
-    options.render = inlineTemplate.render;
-    options.staticRenderFns = inlineTemplate.staticRenderFns;
-  }
-  return new vnode.componentOptions.Ctor(options)
+
+  for (var key in propsOptions) loop( key );
+  toggleObserving(true);
 }
 
-function mergeHooks (data) {
-  if (!data.hook) {
-    data.hook = {};
+function initData (vm) {
+  var data = vm.$options.data;
+  data = vm._data = typeof data === 'function'
+    ? getData(data, vm)
+    : data || {};
+  if (!isPlainObject(data)) {
+    data = {};
+    process.env.NODE_ENV !== 'production' && warn(
+      'data functions should return an object:\n' +
+      'https://v2.vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      vm
+    );
   }
-  for (var i = 0; i < hooksToMerge.length; i++) {
-    var key = hooksToMerge[i];
-    var fromParent = data.hook[key];
-    var ours = componentVNodeHooks[key];
-    data.hook[key] = fromParent ? mergeHook$1(ours, fromParent) : ours;
+  // proxy data on instance
+  var keys = Object.keys(data);
+  var props = vm.$options.props;
+  var methods = vm.$options.methods;
+  var i = keys.length;
+  while (i--) {
+    var key = keys[i];
+    if (process.env.NODE_ENV !== 'production') {
+      if (methods && hasOwn(methods, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a data property."),
+          vm
+        );
+      }
+    }
+    if (props && hasOwn(props, key)) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "The data property \"" + key + "\" is already declared as a prop. " +
+        "Use prop default value instead.",
+        vm
+      );
+    } else if (!isReserved(key)) {
+      proxy(vm, "_data", key);
+    }
   }
+  // observe data
+  observe(data, true /* asRootData */);
 }
 
-function mergeHook$1 (one, two) {
-  return function (a, b, c, d) {
-    one(a, b, c, d);
-    two(a, b, c, d);
+function getData (data, vm) {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget();
+  try {
+    return data.call(vm, vm)
+  } catch (e) {
+    handleError(e, vm, "data()");
+    return {}
+  } finally {
+    popTarget();
   }
 }
 
-// transform component v-model info (value and callback) into
-// prop and event handler respectively.
-function transformModel (options, data) {
-  var prop = (options.model && options.model.prop) || 'value';
-  var event = (options.model && options.model.event) || 'input';(data.props || (data.props = {}))[prop] = data.model.value;
-  var on = data.on || (data.on = {});
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event]);
-  } else {
-    on[event] = data.model.callback;
-  }
-}
+var computedWatcherOptions = { lazy: true };
 
-/*  */
+function initComputed (vm, computed) {
+  // $flow-disable-line
+  var watchers = vm._computedWatchers = Object.create(null);
+  // computed properties are just getters during SSR
+  var isSSR = isServerRendering();
 
-var SIMPLE_NORMALIZE = 1;
-var ALWAYS_NORMALIZE = 2;
+  for (var key in computed) {
+    var userDef = computed[key];
+    var getter = typeof userDef === 'function' ? userDef : userDef.get;
+    if (process.env.NODE_ENV !== 'production' && getter == null) {
+      warn(
+        ("Getter is missing for computed property \"" + key + "\"."),
+        vm
+      );
+    }
 
-// wrapper function for providing a more flexible interface
-// without getting yelled at by flow
-function createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType,
-  alwaysNormalize
-) {
-  if (Array.isArray(data) || isPrimitive(data)) {
-    normalizationType = children;
-    children = data;
-    data = undefined;
-  }
-  if (isTrue(alwaysNormalize)) {
-    normalizationType = ALWAYS_NORMALIZE;
+    if (!isSSR) {
+      // create internal watcher for the computed property.
+      watchers[key] = new Watcher(
+        vm,
+        getter || noop,
+        noop,
+        computedWatcherOptions
+      );
+    }
+
+    // component-defined computed properties are already defined on the
+    // component prototype. We only need to define computed properties defined
+    // at instantiation here.
+    if (!(key in vm)) {
+      defineComputed(vm, key, userDef);
+    } else if (process.env.NODE_ENV !== 'production') {
+      if (key in vm.$data) {
+        warn(("The computed property \"" + key + "\" is already defined in data."), vm);
+      } else if (vm.$options.props && key in vm.$options.props) {
+        warn(("The computed property \"" + key + "\" is already defined as a prop."), vm);
+      }
+    }
   }
-  return _createElement(context, tag, data, children, normalizationType)
 }
 
-function _createElement (
-  context,
-  tag,
-  data,
-  children,
-  normalizationType
+function defineComputed (
+  target,
+  key,
+  userDef
 ) {
-  if (isDef(data) && isDef((data).__ob__)) {
-    process.env.NODE_ENV !== 'production' && warn(
-      "Avoid using observed data object as vnode data: " + (JSON.stringify(data)) + "\n" +
-      'Always create fresh vnode data objects in each render!',
-      context
-    );
-    return createEmptyVNode()
-  }
-  // object syntax in v-bind
-  if (isDef(data) && isDef(data.is)) {
-    tag = data.is;
-  }
-  if (!tag) {
-    // in case of component :is set to falsy value
-    return createEmptyVNode()
+  var shouldCache = !isServerRendering();
+  if (typeof userDef === 'function') {
+    sharedPropertyDefinition.get = shouldCache
+      ? createComputedGetter(key)
+      : createGetterInvoker(userDef);
+    sharedPropertyDefinition.set = noop;
+  } else {
+    sharedPropertyDefinition.get = userDef.get
+      ? shouldCache && userDef.cache !== false
+        ? createComputedGetter(key)
+        : createGetterInvoker(userDef.get)
+      : noop;
+    sharedPropertyDefinition.set = userDef.set || noop;
   }
-  // warn against non-primitive key
   if (process.env.NODE_ENV !== 'production' &&
-    isDef(data) && isDef(data.key) && !isPrimitive(data.key)
-  ) {
-    if (!true || !('@binding' in data.key)) {
+      sharedPropertyDefinition.set === noop) {
+    sharedPropertyDefinition.set = function () {
       warn(
-        'Avoid using non-primitive value as key, ' +
-        'use string/number value instead.',
-        context
+        ("Computed property \"" + key + "\" was assigned to but it has no setter."),
+        this
       );
-    }
+    };
   }
-  // support single function children as default scoped slot
-  if (Array.isArray(children) &&
-    typeof children[0] === 'function'
-  ) {
-    data = data || {};
-    data.scopedSlots = { default: children[0] };
-    children.length = 0;
+  Object.defineProperty(target, key, sharedPropertyDefinition);
+}
+
+function createComputedGetter (key) {
+  return function computedGetter () {
+    var watcher = this._computedWatchers && this._computedWatchers[key];
+    if (watcher) {
+      if (watcher.dirty) {
+        watcher.evaluate();
+      }
+      if (Dep.target) {
+        watcher.depend();
+      }
+      return watcher.value
+    }
   }
-  if (normalizationType === ALWAYS_NORMALIZE) {
-    children = normalizeChildren(children);
-  } else if (normalizationType === SIMPLE_NORMALIZE) {
-    children = simpleNormalizeChildren(children);
+}
+
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
   }
-  var vnode, ns;
-  if (typeof tag === 'string') {
-    var Ctor;
-    ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag);
-    if (config.isReservedTag(tag)) {
-      // platform built-in elements
-      vnode = new VNode(
-        config.parsePlatformTagName(tag), data, children,
-        undefined, undefined, context
-      );
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
-      // component
-      vnode = createComponent(Ctor, data, context, children, tag);
-    } else {
-      // unknown or unlisted namespaced elements
-      // check at runtime because it may get assigned a namespace when its
-      // parent normalizes children
-      vnode = new VNode(
-        tag, data, children,
-        undefined, undefined, context
-      );
+}
+
+function initMethods (vm, methods) {
+  var props = vm.$options.props;
+  for (var key in methods) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (typeof methods[key] !== 'function') {
+        warn(
+          "Method \"" + key + "\" has type \"" + (typeof methods[key]) + "\" in the component definition. " +
+          "Did you reference the function correctly?",
+          vm
+        );
+      }
+      if (props && hasOwn(props, key)) {
+        warn(
+          ("Method \"" + key + "\" has already been defined as a prop."),
+          vm
+        );
+      }
+      if ((key in vm) && isReserved(key)) {
+        warn(
+          "Method \"" + key + "\" conflicts with an existing Vue instance method. " +
+          "Avoid defining component methods that start with _ or $."
+        );
+      }
     }
-  } else {
-    // direct component options / constructor
-    vnode = createComponent(tag, data, context, children);
-  }
-  if (isDef(vnode)) {
-    if (ns) { applyNS(vnode, ns); }
-    return vnode
-  } else {
-    return createEmptyVNode()
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
   }
 }
 
-function applyNS (vnode, ns, force) {
-  vnode.ns = ns;
-  if (vnode.tag === 'foreignObject') {
-    // use default namespace inside foreignObject
-    ns = undefined;
-    force = true;
-  }
-  if (isDef(vnode.children)) {
-    for (var i = 0, l = vnode.children.length; i < l; i++) {
-      var child = vnode.children[i];
-      if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force))) {
-        applyNS(child, ns, force);
+function initWatch (vm, watch) {
+  for (var key in watch) {
+    var handler = watch[key];
+    if (Array.isArray(handler)) {
+      for (var i = 0; i < handler.length; i++) {
+        createWatcher(vm, key, handler[i]);
       }
+    } else {
+      createWatcher(vm, key, handler);
     }
   }
 }
 
-/*  */
-
-function initRender (vm) {
-  vm._vnode = null; // the root of the child tree
-  vm._staticTrees = null; // v-once cached trees
-  var options = vm.$options;
-  var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree
-  var renderContext = parentVnode && parentVnode.context;
-  vm.$slots = resolveSlots(options._renderChildren, renderContext);
-  vm.$scopedSlots = emptyObject;
-  // bind the createElement fn to this instance
-  // so that we get proper render context inside it.
-  // args order: tag, data, children, normalizationType, alwaysNormalize
-  // internal version is used by render functions compiled from templates
-  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
-  // normalization is always applied for the public version, used in
-  // user-written render functions.
-  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
-
-  // $attrs & $listeners are exposed for easier HOC creation.
-  // they need to be reactive so that HOCs using them are always updated
-  var parentData = parentVnode && parentVnode.data;
-
-  /* istanbul ignore else */
-  if (process.env.NODE_ENV !== 'production') {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
-    }, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, function () {
-      !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
-    }, true);
-  } else {
-    defineReactive(vm, '$attrs', parentData && parentData.attrs || emptyObject, null, true);
-    defineReactive(vm, '$listeners', options._parentListeners || emptyObject, null, true);
+function createWatcher (
+  vm,
+  expOrFn,
+  handler,
+  options
+) {
+  if (isPlainObject(handler)) {
+    options = handler;
+    handler = handler.handler;
+  }
+  if (typeof handler === 'string') {
+    handler = vm[handler];
   }
+  return vm.$watch(expOrFn, handler, options)
 }
 
-function renderMixin (Vue) {
-  // install runtime convenience helpers
-  installRenderHelpers(Vue.prototype);
+function stateMixin (Vue) {
+  // flow somehow has problems with directly declared definition object
+  // when using Object.defineProperty, so we have to procedurally build up
+  // the object here.
+  var dataDef = {};
+  dataDef.get = function () { return this._data };
+  var propsDef = {};
+  propsDef.get = function () { return this._props };
+  if (process.env.NODE_ENV !== 'production') {
+    dataDef.set = function () {
+      warn(
+        'Avoid replacing instance root $data. ' +
+        'Use nested data properties instead.',
+        this
+      );
+    };
+    propsDef.set = function () {
+      warn("$props is readonly.", this);
+    };
+  }
+  Object.defineProperty(Vue.prototype, '$data', dataDef);
+  Object.defineProperty(Vue.prototype, '$props', propsDef);
 
-  Vue.prototype.$nextTick = function (fn) {
-    return nextTick(fn, this)
-  };
+  Vue.prototype.$set = set;
+  Vue.prototype.$delete = del;
 
-  Vue.prototype._render = function () {
+  Vue.prototype.$watch = function (
+    expOrFn,
+    cb,
+    options
+  ) {
     var vm = this;
-    var ref = vm.$options;
-    var render = ref.render;
-    var _parentVnode = ref._parentVnode;
-
-    if (vm._isMounted) {
-      // if the parent didn't update, the slot nodes will be the ones from
-      // last render. They need to be cloned to ensure "freshness" for this render.
-      for (var key in vm.$slots) {
-        var slot = vm.$slots[key];
-        // _rendered is a flag added by renderSlot, but may not be present
-        // if the slot is passed from manually written render functions
-        if (slot._rendered || (slot[0] && slot[0].elm)) {
-          vm.$slots[key] = cloneVNodes(slot, true /* deep */);
-        }
-      }
+    if (isPlainObject(cb)) {
+      return createWatcher(vm, expOrFn, cb, options)
     }
-
-    vm.$scopedSlots = (_parentVnode && _parentVnode.data.scopedSlots) || emptyObject;
-
-    // set parent vnode. this allows render functions to have access
-    // to the data on the placeholder node.
-    vm.$vnode = _parentVnode;
-    // render self
-    var vnode;
-    try {
-      vnode = render.call(vm._renderProxy, vm.$createElement);
-    } catch (e) {
-      handleError(e, vm, "render");
-      // return error render result,
-      // or previous vnode to prevent render error causing blank component
-      /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
-          } catch (e) {
-            handleError(e, vm, "renderError");
-            vnode = vm._vnode;
-          }
-        } else {
-          vnode = vm._vnode;
-        }
-      } else {
-        vnode = vm._vnode;
+    options = options || {};
+    options.user = true;
+    var watcher = new Watcher(vm, expOrFn, cb, options);
+    if (options.immediate) {
+      try {
+        cb.call(vm, watcher.value);
+      } catch (error) {
+        handleError(error, vm, ("callback for immediate watcher \"" + (watcher.expression) + "\""));
       }
     }
-    // return empty vnode in case the render function errored out
-    if (!(vnode instanceof VNode)) {
-      if (process.env.NODE_ENV !== 'production' && Array.isArray(vnode)) {
-        warn(
-          'Multiple root nodes returned from render function. Render function ' +
-          'should return a single root node.',
-          vm
-        );
-      }
-      vnode = createEmptyVNode();
+    return function unwatchFn () {
+      watcher.teardown();
     }
-    // set parent
-    vnode.parent = _parentVnode;
-    return vnode
   };
 }
 
 /*  */
 
-var uid = 0;
+var uid$3 = 0;
 
 function initMixin (Vue) {
   Vue.prototype._init = function (options) {
     var vm = this;
     // a uid
-    vm._uid = uid++;
+    vm._uid = uid$3++;
 
     var startTag, endTag;
     /* istanbul ignore if */
@@ -4799,8 +5218,6 @@ function initInternalComponent (vm, options) {
   var parentVnode = options._parentVnode;
   opts.parent = options.parent;
   opts._parentVnode = parentVnode;
-  opts._parentElm = options._parentElm;
-  opts._refElm = options._refElm;
 
   var vnodeComponentOptions = parentVnode.componentOptions;
   opts.propsData = vnodeComponentOptions.propsData;
@@ -4841,50 +5258,30 @@ function resolveConstructorOptions (Ctor) {
 function resolveModifiedOptions (Ctor) {
   var modified;
   var latest = Ctor.options;
-  var extended = Ctor.extendOptions;
   var sealed = Ctor.sealedOptions;
   for (var key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) { modified = {}; }
-      modified[key] = dedupe(latest[key], extended[key], sealed[key]);
+      modified[key] = latest[key];
     }
   }
   return modified
 }
 
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    var res = [];
-    sealed = Array.isArray(sealed) ? sealed : [sealed];
-    extended = Array.isArray(extended) ? extended : [extended];
-    for (var i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i]);
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
-
-function Vue$2 (options) {
+function Vue (options) {
   if (process.env.NODE_ENV !== 'production' &&
-    !(this instanceof Vue$2)
+    !(this instanceof Vue)
   ) {
     warn('Vue is a constructor and should be called with the `new` keyword');
   }
   this._init(options);
 }
 
-initMixin(Vue$2);
-stateMixin(Vue$2);
-eventsMixin(Vue$2);
-lifecycleMixin(Vue$2);
-renderMixin(Vue$2);
+initMixin(Vue);
+stateMixin(Vue);
+eventsMixin(Vue);
+lifecycleMixin(Vue);
+renderMixin(Vue);
 
 /*  */
 
@@ -5043,6 +5440,8 @@ function initAssetRegisters (Vue) {
 
 /*  */
 
+
+
 function getComponentName (opts) {
   return opts && (opts.Ctor.options.name || opts.tag)
 }
@@ -5106,20 +5505,20 @@ var KeepAlive = {
   },
 
   destroyed: function destroyed () {
-    var this$1 = this;
-
-    for (var key in this$1.cache) {
-      pruneCacheEntry(this$1.cache, key, this$1.keys);
+    for (var key in this.cache) {
+      pruneCacheEntry(this.cache, key, this.keys);
     }
   },
 
-  watch: {
-    include: function include (val) {
-      pruneCache(this, function (name) { return matches(val, name); });
-    },
-    exclude: function exclude (val) {
-      pruneCache(this, function (name) { return !matches(val, name); });
-    }
+  mounted: function mounted () {
+    var this$1 = this;
+
+    this.$watch('include', function (val) {
+      pruneCache(this$1, function (name) { return matches(val, name); });
+    });
+    this.$watch('exclude', function (val) {
+      pruneCache(this$1, function (name) { return !matches(val, name); });
+    });
   },
 
   render: function render () {
@@ -5195,13 +5594,19 @@ function initGlobalAPI (Vue) {
     warn: warn,
     extend: extend,
     mergeOptions: mergeOptions,
-    defineReactive: defineReactive
+    defineReactive: defineReactive$$1
   };
 
   Vue.set = set;
   Vue.delete = del;
   Vue.nextTick = nextTick;
 
+  // 2.6 explicit observable API
+  Vue.observable = function (obj) {
+    observe(obj);
+    return obj
+  };
+
   Vue.options = Object.create(null);
   ASSET_TYPES.forEach(function (type) {
     Vue.options[type + 's'] = Object.create(null);
@@ -5219,20 +5624,25 @@ function initGlobalAPI (Vue) {
   initAssetRegisters(Vue);
 }
 
-initGlobalAPI(Vue$2);
+initGlobalAPI(Vue);
 
-Object.defineProperty(Vue$2.prototype, '$isServer', {
+Object.defineProperty(Vue.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Object.defineProperty(Vue$2.prototype, '$ssrContext', {
+Object.defineProperty(Vue.prototype, '$ssrContext', {
   get: function get () {
     /* istanbul ignore next */
     return this.$vnode && this.$vnode.ssrContext
   }
 });
 
-Vue$2.version = '2.5.11';
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+});
+
+Vue.version = '2.6.10';
 
 var latestNodeId = 1;
 
@@ -5244,8 +5654,7 @@ function TextNode (text) {
   this.text = text;
 }
 
-/* globals document */
-// document is injected by weex factory wrapper
+/*  */
 
 var namespaceMap = {};
 
@@ -5265,7 +5674,11 @@ function createComment (text) {
   return document.createComment(text)
 }
 
-function insertBefore (node, target, before) {
+function insertBefore (
+  node,
+  target,
+  before
+) {
   if (target.nodeType === 3) {
     if (node.type === 'text') {
       node.setAttr('value', target.text);
@@ -5317,28 +5730,34 @@ function tagName (node) {
 }
 
 function setTextContent (node, text) {
-  node.parentNode.setAttr('value', text);
+  if (node.parentNode) {
+    node.parentNode.setAttr('value', text);
+  }
 }
 
 function setAttribute (node, key, val) {
   node.setAttr(key, val);
 }
 
-
-var nodeOps = Object.freeze({
-	namespaceMap: namespaceMap,
-	createElement: createElement$1,
-	createElementNS: createElementNS,
-	createTextNode: createTextNode,
-	createComment: createComment,
-	insertBefore: insertBefore,
-	removeChild: removeChild,
-	appendChild: appendChild,
-	parentNode: parentNode,
-	nextSibling: nextSibling,
-	tagName: tagName,
-	setTextContent: setTextContent,
-	setAttribute: setAttribute
+function setStyleScope (node, scopeId) {
+  node.setAttr('@styleScope', scopeId);
+}
+
+var nodeOps = /*#__PURE__*/Object.freeze({
+  namespaceMap: namespaceMap,
+  createElement: createElement$1,
+  createElementNS: createElementNS,
+  createTextNode: createTextNode,
+  createComment: createComment,
+  insertBefore: insertBefore,
+  removeChild: removeChild,
+  appendChild: appendChild,
+  parentNode: parentNode,
+  nextSibling: nextSibling,
+  tagName: tagName,
+  setTextContent: setTextContent,
+  setAttribute: setAttribute,
+  setStyleScope: setStyleScope
 });
 
 /*  */
@@ -5360,7 +5779,7 @@ var ref = {
 
 function registerRef (vnode, isRemoval) {
   var key = vnode.data.ref;
-  if (!key) { return }
+  if (!isDef(key)) { return }
 
   var vm = vnode.context;
   var ref = vnode.componentInstance || vnode.elm;
@@ -5387,8 +5806,6 @@ function registerRef (vnode, isRemoval) {
 
 /*  */
 
-
-
 var isHTMLTag = makeMap(
   'html,body,base,head,link,meta,style,title,' +
   'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' +
@@ -5412,14 +5829,6 @@ var isSVG = makeMap(
   true
 );
 
-
-
-
-
-
-
-
-
 var isTextInputType = makeMap('text,number,password,search,email,tel,url');
 
 /**
@@ -5494,13 +5903,13 @@ function createPatchFunction (backend) {
   }
 
   function createRmCb (childElm, listeners) {
-    function remove () {
-      if (--remove.listeners === 0) {
+    function remove$$1 () {
+      if (--remove$$1.listeners === 0) {
         removeNode(childElm);
       }
     }
-    remove.listeners = listeners;
-    return remove
+    remove$$1.listeners = listeners;
+    return remove$$1
   }
 
   function removeNode (el) {
@@ -5528,7 +5937,25 @@ function createPatchFunction (backend) {
   }
 
   var creatingElmInVPre = 0;
-  function createElm (vnode, insertedVnodeQueue, parentElm, refElm, nested) {
+
+  function createElm (
+    vnode,
+    insertedVnodeQueue,
+    parentElm,
+    refElm,
+    nested,
+    ownerArray,
+    index
+  ) {
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // This vnode was used in a previous render!
+      // now it's used as a new node, overwriting its elm would cause
+      // potential patch errors down the road when it's used as an insertion
+      // reference node. Instead, we clone the node on-demand before creating
+      // associated DOM element for it.
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     vnode.isRootInsert = !nested; // for transition enter check
     if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
       return
@@ -5551,6 +5978,7 @@ function createPatchFunction (backend) {
           );
         }
       }
+
       vnode.elm = vnode.ns
         ? nodeOps.createElementNS(vnode.ns, tag)
         : nodeOps.createElement(tag, vnode);
@@ -5594,7 +6022,7 @@ function createPatchFunction (backend) {
     if (isDef(i)) {
       var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;
       if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm);
+        i(vnode, false /* hydrating */);
       }
       // after calling the init hook, if the vnode is a child component
       // it should've created a child instance and mounted it. the child
@@ -5602,6 +6030,7 @@ function createPatchFunction (backend) {
       // in that case we can just return the element and be done.
       if (isDef(vnode.componentInstance)) {
         initComponent(vnode, insertedVnodeQueue);
+        insert(parentElm, vnode.elm, refElm);
         if (isTrue(isReactivated)) {
           reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
         }
@@ -5653,7 +6082,7 @@ function createPatchFunction (backend) {
   function insert (parent, elm, ref$$1) {
     if (isDef(parent)) {
       if (isDef(ref$$1)) {
-        if (ref$$1.parentNode === parent) {
+        if (nodeOps.parentNode(ref$$1) === parent) {
           nodeOps.insertBefore(parent, elm, ref$$1);
         }
       } else {
@@ -5668,10 +6097,10 @@ function createPatchFunction (backend) {
         checkDuplicateKeys(children);
       }
       for (var i = 0; i < children.length; ++i) {
-        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true);
+        createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
       }
     } else if (isPrimitive(vnode.text)) {
-      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(vnode.text));
+      nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
     }
   }
 
@@ -5699,12 +6128,12 @@ function createPatchFunction (backend) {
   function setScope (vnode) {
     var i;
     if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     } else {
       var ancestor = vnode;
       while (ancestor) {
         if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '');
+          nodeOps.setStyleScope(vnode.elm, i);
         }
         ancestor = ancestor.parent;
       }
@@ -5715,13 +6144,13 @@ function createPatchFunction (backend) {
       i !== vnode.fnContext &&
       isDef(i = i.$options._scopeId)
     ) {
-      nodeOps.setAttribute(vnode.elm, i, '');
+      nodeOps.setStyleScope(vnode.elm, i);
     }
   }
 
   function addVnodes (parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
     for (; startIdx <= endIdx; ++startIdx) {
-      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm);
+      createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
     }
   }
 
@@ -5739,7 +6168,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+  function removeVnodes (vnodes, startIdx, endIdx) {
     for (; startIdx <= endIdx; ++startIdx) {
       var ch = vnodes[startIdx];
       if (isDef(ch)) {
@@ -5808,20 +6237,20 @@ function createPatchFunction (backend) {
       } else if (isUndef(oldEndVnode)) {
         oldEndVnode = oldCh[--oldEndIdx];
       } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         oldStartVnode = oldCh[++oldStartIdx];
         newStartVnode = newCh[++newStartIdx];
       } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         oldEndVnode = oldCh[--oldEndIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
         canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
         oldStartVnode = oldCh[++oldStartIdx];
         newEndVnode = newCh[--newEndIdx];
       } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
         canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
         oldEndVnode = oldCh[--oldEndIdx];
         newStartVnode = newCh[++newStartIdx];
@@ -5831,16 +6260,16 @@ function createPatchFunction (backend) {
           ? oldKeyToIdx[newStartVnode.key]
           : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);
         if (isUndef(idxInOld)) { // New element
-          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+          createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
         } else {
           vnodeToMove = oldCh[idxInOld];
           if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue);
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
           } else {
             // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
           }
         }
         newStartVnode = newCh[++newStartIdx];
@@ -5850,7 +6279,7 @@ function createPatchFunction (backend) {
       refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
       addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
     } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx);
     }
   }
 
@@ -5879,11 +6308,23 @@ function createPatchFunction (backend) {
     }
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
     if (oldVnode === vnode) {
       return
     }
 
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode);
+    }
+
     var elm = vnode.elm = oldVnode.elm;
 
     if (isTrue(oldVnode.isAsyncPlaceholder)) {
@@ -5924,10 +6365,13 @@ function createPatchFunction (backend) {
       if (isDef(oldCh) && isDef(ch)) {
         if (oldCh !== ch) { updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly); }
       } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch);
+        }
         if (isDef(oldVnode.text)) { nodeOps.setTextContent(elm, ''); }
         addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
       } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
+        removeVnodes(oldCh, 0, oldCh.length - 1);
       } else if (isDef(oldVnode.text)) {
         nodeOps.setTextContent(elm, '');
       }
@@ -6065,7 +6509,7 @@ function createPatchFunction (backend) {
     }
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
     if (isUndef(vnode)) {
       if (isDef(oldVnode)) { invokeDestroyHook(oldVnode); }
       return
@@ -6077,12 +6521,12 @@ function createPatchFunction (backend) {
     if (isUndef(oldVnode)) {
       // empty mount (likely as component), create new root element
       isInitialPatch = true;
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm);
+      createElm(vnode, insertedVnodeQueue);
     } else {
       var isRealElement = isDef(oldVnode.nodeType);
       if (!isRealElement && sameVnode(oldVnode, vnode)) {
         // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly);
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
       } else {
         if (isRealElement) {
           // mounting to a real element
@@ -6113,7 +6557,7 @@ function createPatchFunction (backend) {
 
         // replacing existing element
         var oldElm = oldVnode.elm;
-        var parentElm$1 = nodeOps.parentNode(oldElm);
+        var parentElm = nodeOps.parentNode(oldElm);
 
         // create new node
         createElm(
@@ -6122,7 +6566,7 @@ function createPatchFunction (backend) {
           // extremely rare edge case: do not insert if old element is in a
           // leaving transition. Only happens when combining transition +
           // keep-alive + HOCs. (#4590)
-          oldElm._leaveCb ? null : parentElm$1,
+          oldElm._leaveCb ? null : parentElm,
           nodeOps.nextSibling(oldElm)
         );
 
@@ -6157,8 +6601,8 @@ function createPatchFunction (backend) {
         }
 
         // destroy old node
-        if (isDef(parentElm$1)) {
-          removeVnodes(parentElm$1, [oldVnode], 0, 0);
+        if (isDef(parentElm)) {
+          removeVnodes([oldVnode], 0, 0);
         } else if (isDef(oldVnode.tag)) {
           invokeDestroyHook(oldVnode);
         }
@@ -6208,6 +6652,7 @@ function _update (oldVnode, vnode) {
     } else {
       // existing directive, update
       dir.oldValue = oldDir.value;
+      dir.oldArg = oldDir.arg;
       callHook$1(dir, 'update', vnode, oldVnode);
       if (dir.def && dir.def.componentUpdated) {
         dirsWithPostpatch.push(dir);
@@ -6349,34 +6794,39 @@ function updateClass (oldVnode, vnode) {
     return
   }
 
-  var oldClassList = [];
-  // unlike web, weex vnode staticClass is an Array
-  var oldStaticClass = oldData.staticClass;
-  if (oldStaticClass) {
-    oldClassList.push.apply(oldClassList, oldStaticClass);
-  }
-  if (oldData.class) {
-    oldClassList.push.apply(oldClassList, oldData.class);
+  var oldClassList = makeClassList(oldData);
+  var classList = makeClassList(data);
+
+  if (typeof el.setClassList === 'function') {
+    el.setClassList(classList);
+  } else {
+    var style = getStyle(oldClassList, classList, ctx);
+    if (typeof el.setStyles === 'function') {
+      el.setStyles(style);
+    } else {
+      for (var key in style) {
+        el.setStyle(key, style[key]);
+      }
+    }
   }
+}
 
+function makeClassList (data) {
   var classList = [];
   // unlike web, weex vnode staticClass is an Array
   var staticClass = data.staticClass;
+  var dataClass = data.class;
   if (staticClass) {
     classList.push.apply(classList, staticClass);
   }
-  if (data.class) {
-    classList.push.apply(classList, data.class);
-  }
-
-  var style = getStyle(oldClassList, classList, ctx);
-  if (typeof el.setStyles === 'function') {
-    el.setStyles(style);
-  } else {
-    for (var key in style) {
-      el.setStyle(key, style[key]);
-    }
+  if (Array.isArray(dataClass)) {
+    classList.push.apply(classList, dataClass);
+  } else if (isObject(dataClass)) {
+    classList.push.apply(classList, Object.keys(dataClass).filter(function (className) { return dataClass[className]; }));
+  } else if (typeof dataClass === 'string') {
+    classList.push.apply(classList, dataClass.trim().split(/\s+/));
   }
+  return classList
 }
 
 function getStyle (oldClassList, classList, ctx) {
@@ -6408,10 +6858,19 @@ var klass = {
 
 var target$1;
 
+function createOnceHandler$1 (event, handler, capture) {
+  var _target = target$1; // save current target element in closure
+  return function onceHandler () {
+    var res = handler.apply(null, arguments);
+    if (res !== null) {
+      remove$2(event, onceHandler, capture, _target);
+    }
+  }
+}
+
 function add$1 (
   event,
   handler,
-  once,
   capture,
   passive,
   params
@@ -6420,18 +6879,6 @@ function add$1 (
     console.log('Weex do not support event in bubble phase.');
     return
   }
-  if (once) {
-    var oldHandler = handler;
-    var _target = target$1; // save current target element in closure
-    handler = function (ev) {
-      var res = arguments.length === 1
-        ? oldHandler(ev)
-        : oldHandler.apply(null, arguments);
-      if (res !== null) {
-        remove$2(event, null, null, _target);
-      }
-    };
-  }
   target$1.addEvent(event, handler, params);
 }
 
@@ -6451,7 +6898,7 @@ function updateDOMListeners (oldVnode, vnode) {
   var on = vnode.data.on || {};
   var oldOn = oldVnode.data.on || {};
   target$1 = vnode.elm;
-  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
+  updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
   target$1 = undefined;
 }
 
@@ -6545,33 +6992,22 @@ var style = {
 
 /*  */
 
-/**
- * Add class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-
-
-/**
- * Remove class with compatibility for SVG since classList is not supported on
- * SVG elements in IE
- */
-
 /*  */
 
-function resolveTransition (def) {
-  if (!def) {
+function resolveTransition (def$$1) {
+  if (!def$$1) {
     return
   }
   /* istanbul ignore else */
-  if (typeof def === 'object') {
+  if (typeof def$$1 === 'object') {
     var res = {};
-    if (def.css !== false) {
-      extend(res, autoCssTransition(def.name || 'v'));
+    if (def$$1.css !== false) {
+      extend(res, autoCssTransition(def$$1.name || 'v'));
     }
-    extend(res, def);
+    extend(res, def$$1);
     return res
-  } else if (typeof def === 'string') {
-    return autoCssTransition(def)
+  } else if (typeof def$$1 === 'string') {
+    return autoCssTransition(def$$1)
   }
 }
 
@@ -6587,23 +7023,14 @@ var autoCssTransition = cached(function (name) {
 });
 
 var hasTransition = inBrowser && !isIE9;
-// Transition property/event sniffing
-
-
-
-
 if (hasTransition) {
   /* istanbul ignore if */
   if (window.ontransitionend === undefined &&
     window.onwebkittransitionend !== undefined
-  ) {
-    
-  }
+  ) ;
   if (window.onanimationend === undefined &&
     window.onwebkitanimationend !== undefined
-  ) {
-    
-  }
+  ) ;
 }
 
 // binding to window is necessary to make hot reload work in IE in strict mode
@@ -6683,7 +7110,7 @@ function enter (_, vnode) {
   var stylesheet = vnode.context.$options.style || {};
   var startState = stylesheet[startClass];
   var transitionProperties = (stylesheet['@TRANSITION'] && stylesheet['@TRANSITION'][activeClass]) || {};
-  var endState = getEnterTargetState(el, stylesheet, startClass, toClass, activeClass, vnode.context);
+  var endState = getEnterTargetState(el, stylesheet, startClass, toClass, activeClass);
   var needAnimation = Object.keys(endState).length > 0;
 
   var cb = el._enterCb = once(function () {
@@ -6835,7 +7262,7 @@ function leave (vnode, rm) {
 }
 
 // determine the target animation style for an entering transition.
-function getEnterTargetState (el, stylesheet, startClass, endClass, activeClass, vm) {
+function getEnterTargetState (el, stylesheet, startClass, endClass, activeClass) {
   var targetState = {};
   var startState = stylesheet[startClass];
   var endState = stylesheet[endClass];
@@ -6985,9 +7412,6 @@ var Richtext = {
 
 /*  */
 
-// Provides transition support for a single element/component.
-// supports transition mode (out-in / in-out)
-
 var transitionProps = {
   name: String,
   appear: Boolean,
@@ -7053,7 +7477,11 @@ function isSameChild (child, oldChild) {
   return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
-var Transition$1 = {
+var isNotTextNode = function (c) { return c.tag || isAsyncPlaceholder(c); };
+
+var isVShowDirective = function (d) { return d.name === 'show'; };
+
+var Transition = {
   name: 'transition',
   props: transitionProps,
   abstract: true,
@@ -7067,7 +7495,7 @@ var Transition$1 = {
     }
 
     // filter out text nodes (possible whitespaces)
-    children = children.filter(function (c) { return c.tag || isAsyncPlaceholder(c); });
+    children = children.filter(isNotTextNode);
     /* istanbul ignore if */
     if (!children.length) {
       return
@@ -7132,7 +7560,7 @@ var Transition$1 = {
 
     // mark v-show
     // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(function (d) { return d.name === 'show'; })) {
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
       child.data.show = true;
     }
 
@@ -7254,7 +7682,7 @@ var TransitionGroup = {
       this._vnode,
       this.kept,
       false, // hydrating
-      true // removeOnly (!important avoids unnecessary moves)
+      true // removeOnly (!important, avoids unnecessary moves)
     );
     this._vnode = this.kept;
   },
@@ -7322,16 +7750,12 @@ var TransitionGroup = {
 
 var platformComponents = {
   Richtext: Richtext,
-  Transition: Transition$1,
+  Transition: Transition,
   TransitionGroup: TransitionGroup
 };
 
 /*  */
 
-// These util functions are split into its own file because Rollup cannot drop
-// makeMap() due to potential side effects, so these variables end up
-// bloating the web builds.
-
 var isReservedTag$1 = makeMap(
   'template,script,style,element,content,slot,link,meta,svg,view,' +
   'a,div,img,image,text,span,input,switch,textarea,spinner,select,' +
@@ -7359,20 +7783,18 @@ var isUnaryTag = makeMap(
   true
 );
 
-function mustUseProp (tag, type, name) {
+function mustUseProp () {
   return false
 }
 
-
-
-function isUnknownElement$1 (tag) {
+function isUnknownElement$1 () {
   return false
 }
 
 function query (el, document) {
   // document is injected by weex factory wrapper
   var placeholder = document.createComment('root');
-  placeholder.hasAttribute = placeholder.removeAttribute = function () {}; // hack for patch
+  placeholder.hasAttribute = placeholder.removeAttribute = noop; // hack for patch
   document.documentElement.appendChild(placeholder);
   return placeholder
 }
@@ -7380,20 +7802,20 @@ function query (el, document) {
 /*  */
 
 // install platform specific utils
-Vue$2.config.mustUseProp = mustUseProp;
-Vue$2.config.isReservedTag = isReservedTag$1;
-Vue$2.config.isRuntimeComponent = isRuntimeComponent;
-Vue$2.config.isUnknownElement = isUnknownElement$1;
+Vue.config.mustUseProp = mustUseProp;
+Vue.config.isReservedTag = isReservedTag$1;
+Vue.config.isRuntimeComponent = isRuntimeComponent;
+Vue.config.isUnknownElement = isUnknownElement$1;
 
 // install platform runtime directives and components
-Vue$2.options.directives = platformDirectives;
-Vue$2.options.components = platformComponents;
+Vue.options.directives = platformDirectives;
+Vue.options.components = platformComponents;
 
 // install platform patch function
-Vue$2.prototype.__patch__ = patch;
+Vue.prototype.__patch__ = patch;
 
 // wrap mount
-Vue$2.prototype.$mount = function (
+Vue.prototype.$mount = function (
   el,
   hydrating
 ) {
@@ -7405,8 +7827,9 @@ Vue$2.prototype.$mount = function (
 };
 
 // this entry is built and wrapped with a factory function
-// used to generate a fresh copy of Vue for every Weex instance.
 
-exports.Vue = Vue$2;
+exports.Vue = Vue;
+
+
 
 }
diff --git a/packages/weex-vue-framework/index.js b/packages/weex-vue-framework/index.js
index cc9ff370f2e..8fab9f5373b 100644
--- a/packages/weex-vue-framework/index.js
+++ b/packages/weex-vue-framework/index.js
@@ -2,134 +2,94 @@
 
 Object.defineProperty(exports, '__esModule', { value: true });
 
+/*  */
+
 // this will be preserved during build
+// $flow-disable-line
 var VueFactory = require('./factory');
 
-var instances = {};
-
-/**
- * Prepare framework config.
- * Nothing need to do actually, just an interface provided to weex runtime.
- */
-function init () {}
-
-/**
- * Reset framework config and clear all registrations.
- */
-function reset () {
-  clear(instances);
-}
+var instanceOptions = {};
 
 /**
- * Delete all keys of an object.
- * @param {object} obj
+ * Create instance context.
  */
-function clear (obj) {
-  for (var key in obj) {
-    delete obj[key];
-  }
-}
-
-/**
- * Create an instance with id, code, config and external data.
- * @param {string} instanceId
- * @param {string} appCode
- * @param {object} config
- * @param {object} data
- * @param {object} env { info, config, services }
- */
-function createInstance (
+function createInstanceContext (
   instanceId,
-  appCode,
-  config,
-  data,
-  env
+  runtimeContext,
+  data
 ) {
-  if ( appCode === void 0 ) appCode = '';
-  if ( config === void 0 ) config = {};
-  if ( env === void 0 ) env = {};
-
-  var weex = env.weex;
-  var document = weex.document;
-  var instance = instances[instanceId] = {
-    instanceId: instanceId, config: config, data: data,
-    document: document
+  if ( data === void 0 ) data = {};
+
+  var weex = runtimeContext.weex;
+  var instance = instanceOptions[instanceId] = {
+    instanceId: instanceId,
+    config: weex.config,
+    document: weex.document,
+    data: data
   };
 
-  var timerAPIs = getInstanceTimer(instanceId, weex.requireModule);
-
-  // Each instance has a independent `Vue` module instance
+  // Each instance has an independent `Vue` module instance
   var Vue = instance.Vue = createVueModuleInstance(instanceId, weex);
 
-  // The function which create a closure the JS Bundle will run in.
-  // It will declare some instance variables like `Vue`, HTML5 Timer APIs etc.
-  var instanceVars = Object.assign({
-    Vue: Vue,
-    weex: weex
-  }, timerAPIs, env.services);
-
-  appCode = "(function(global){ \n" + appCode + "\n })(Object.create(this))";
-  callFunction(instanceVars, appCode);
+  // DEPRECATED
+  var timerAPIs = getInstanceTimer(instanceId, weex.requireModule);
 
-  return instance
+  var instanceContext = Object.assign({ Vue: Vue }, timerAPIs);
+  Object.freeze(instanceContext);
+  return instanceContext
 }
 
 /**
  * Destroy an instance with id. It will make sure all memory of
  * this instance released and no more leaks.
- * @param {string} instanceId
  */
 function destroyInstance (instanceId) {
-  var instance = instances[instanceId];
+  var instance = instanceOptions[instanceId];
   if (instance && instance.app instanceof instance.Vue) {
-    instance.document.destroy();
-    instance.app.$destroy();
+    try {
+      instance.app.$destroy();
+      instance.document.destroy();
+    } catch (e) {}
     delete instance.document;
     delete instance.app;
   }
-  delete instances[instanceId];
+  delete instanceOptions[instanceId];
 }
 
 /**
  * Refresh an instance with id and new top-level component data.
  * It will use `Vue.set` on all keys of the new data. So it's better
  * define all possible meaningful keys when instance created.
- * @param {string} instanceId
- * @param {object} data
  */
-function refreshInstance (instanceId, data) {
-  var instance = instances[instanceId];
+function refreshInstance (
+  instanceId,
+  data
+) {
+  var instance = instanceOptions[instanceId];
   if (!instance || !(instance.app instanceof instance.Vue)) {
     return new Error(("refreshInstance: instance " + instanceId + " not found!"))
   }
-  for (var key in data) {
-    instance.Vue.set(instance.app, key, data[key]);
+  if (instance.Vue && instance.Vue.set) {
+    for (var key in data) {
+      instance.Vue.set(instance.app, key, data[key]);
+    }
   }
   // Finally `refreshFinish` signal needed.
   instance.document.taskCenter.send('dom', { action: 'refreshFinish' }, []);
 }
 
-/**
- * Get the JSON object of the root element.
- * @param {string} instanceId
- */
-function getRoot (instanceId) {
-  var instance = instances[instanceId];
-  if (!instance || !(instance.app instanceof instance.Vue)) {
-    return new Error(("getRoot: instance " + instanceId + " not found!"))
-  }
-  return instance.app.$el.toJSON()
-}
-
 /**
  * Create a fresh instance of Vue for each Weex instance.
  */
-function createVueModuleInstance (instanceId, weex) {
+function createVueModuleInstance (
+  instanceId,
+  weex
+) {
   var exports = {};
   VueFactory(exports, weex.document);
   var Vue = exports.Vue;
 
-  var instance = instances[instanceId];
+  var instance = instanceOptions[instanceId];
 
   // patch reserved tag detection to account for dynamically registered
   // components
@@ -169,7 +129,7 @@ function createVueModuleInstance (instanceId, weex) {
     mounted: function mounted () {
       var options = this.$options;
       // root component (vm)
-      if (options.el && weex.document) {
+      if (options.el && weex.document && instance.app === this) {
         try {
           // Send "createFinish" signal to native.
           weex.document.taskCenter.send('dom', { action: 'createFinish' }, []);
@@ -193,16 +153,17 @@ function createVueModuleInstance (instanceId, weex) {
 }
 
 /**
+ * DEPRECATED
  * Generate HTML5 Timer APIs. An important point is that the callback
  * will be converted into callback id when sent to native. So the
  * framework can make sure no side effect of the callback happened after
  * an instance destroyed.
- * @param  {[type]} instanceId   [description]
- * @param  {[type]} moduleGetter [description]
- * @return {[type]}              [description]
  */
-function getInstanceTimer (instanceId, moduleGetter) {
-  var instance = instances[instanceId];
+function getInstanceTimer (
+  instanceId,
+  moduleGetter
+) {
+  var instance = instanceOptions[instanceId];
   var timer = moduleGetter('timer');
   var timerAPIs = {
     setTimeout: function () {
@@ -237,28 +198,6 @@ function getInstanceTimer (instanceId, moduleGetter) {
   return timerAPIs
 }
 
-/**
- * Call a new function body with some global objects.
- * @param  {object} globalObjects
- * @param  {string} code
- * @return {any}
- */
-function callFunction (globalObjects, body) {
-  var globalKeys = [];
-  var globalValues = [];
-  for (var key in globalObjects) {
-    globalKeys.push(key);
-    globalValues.push(globalObjects[key]);
-  }
-  globalKeys.push(body);
-
-  var result = new (Function.prototype.bind.apply( Function, [ null ].concat( globalKeys) ));
-  return result.apply(void 0, globalValues)
-}
-
-exports.init = init;
-exports.reset = reset;
-exports.createInstance = createInstance;
+exports.createInstanceContext = createInstanceContext;
 exports.destroyInstance = destroyInstance;
 exports.refreshInstance = refreshInstance;
-exports.getRoot = getRoot;
diff --git a/scripts/alias.js b/scripts/alias.js
index 30a27b59c19..03904cca35d 100644
--- a/scripts/alias.js
+++ b/scripts/alias.js
@@ -10,6 +10,5 @@ module.exports = {
   web: resolve('src/platforms/web'),
   weex: resolve('src/platforms/weex'),
   server: resolve('src/server'),
-  entries: resolve('src/entries'),
   sfc: resolve('src/sfc')
 }
diff --git a/scripts/build.js b/scripts/build.js
index 82d4c52e631..d29d1e85f7e 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -2,7 +2,7 @@ const fs = require('fs')
 const path = require('path')
 const zlib = require('zlib')
 const rollup = require('rollup')
-const uglify = require('uglify-js')
+const terser = require('terser')
 
 if (!fs.existsSync('dist')) {
   fs.mkdirSync('dist')
@@ -43,12 +43,13 @@ function build (builds) {
 function buildEntry (config) {
   const output = config.output
   const { file, banner } = output
-  const isProd = /min\.js$/.test(file)
+  const isProd = /(min|prod)\.js$/.test(file)
   return rollup.rollup(config)
     .then(bundle => bundle.generate(output))
-    .then(({ code }) => {
+    .then(({ output: [{ code }] }) => {
       if (isProd) {
-        var minified = (banner ? banner + '\n' : '') + uglify.minify(code, {
+        const minified = (banner ? banner + '\n' : '') + terser.minify(code, {
+          toplevel: true,
           output: {
             ascii_only: true
           },
diff --git a/scripts/config.js b/scripts/config.js
index b0c705e4d1a..1294a6534fa 100644
--- a/scripts/config.js
+++ b/scripts/config.js
@@ -7,11 +7,12 @@ const node = require('rollup-plugin-node-resolve')
 const flow = require('rollup-plugin-flow-no-whitespace')
 const version = process.env.VERSION || require('../package.json').version
 const weexVersion = process.env.WEEX_VERSION || require('../packages/weex-vue-framework/package.json').version
+const featureFlags = require('./feature-flags')
 
 const banner =
   '/*!\n' +
-  ' * Vue.js v' + version + '\n' +
-  ' * (c) 2014-' + new Date().getFullYear() + ' Evan You\n' +
+  ` * Vue.js v${version}\n` +
+  ` * (c) 2014-${new Date().getFullYear()} Evan You\n` +
   ' * Released under the MIT License.\n' +
   ' */'
 
@@ -36,29 +37,45 @@ const resolve = p => {
 
 const builds = {
   // Runtime only (CommonJS). Used by bundlers e.g. Webpack & Browserify
-  'web-runtime-cjs': {
+  'web-runtime-cjs-dev': {
     entry: resolve('web/entry-runtime.js'),
-    dest: resolve('dist/vue.runtime.common.js'),
+    dest: resolve('dist/vue.runtime.common.dev.js'),
     format: 'cjs',
+    env: 'development',
+    banner
+  },
+  'web-runtime-cjs-prod': {
+    entry: resolve('web/entry-runtime.js'),
+    dest: resolve('dist/vue.runtime.common.prod.js'),
+    format: 'cjs',
+    env: 'production',
     banner
   },
   // Runtime+compiler CommonJS build (CommonJS)
-  'web-full-cjs': {
+  'web-full-cjs-dev': {
+    entry: resolve('web/entry-runtime-with-compiler.js'),
+    dest: resolve('dist/vue.common.dev.js'),
+    format: 'cjs',
+    env: 'development',
+    alias: { he: './entity-decoder' },
+    banner
+  },
+  'web-full-cjs-prod': {
     entry: resolve('web/entry-runtime-with-compiler.js'),
-    dest: resolve('dist/vue.common.js'),
+    dest: resolve('dist/vue.common.prod.js'),
     format: 'cjs',
+    env: 'production',
     alias: { he: './entity-decoder' },
     banner
   },
-  // Runtime only (ES Modules). Used by bundlers that support ES Modules,
-  // e.g. Rollup & Webpack 2
+  // Runtime only ES modules build (for bundlers)
   'web-runtime-esm': {
     entry: resolve('web/entry-runtime.js'),
     dest: resolve('dist/vue.runtime.esm.js'),
     format: 'es',
     banner
   },
-  // Runtime+compiler CommonJS build (ES Modules)
+  // Runtime+compiler ES modules build (for bundlers)
   'web-full-esm': {
     entry: resolve('web/entry-runtime-with-compiler.js'),
     dest: resolve('dist/vue.esm.js'),
@@ -66,6 +83,26 @@ const builds = {
     alias: { he: './entity-decoder' },
     banner
   },
+  // Runtime+compiler ES modules build (for direct import in browser)
+  'web-full-esm-browser-dev': {
+    entry: resolve('web/entry-runtime-with-compiler.js'),
+    dest: resolve('dist/vue.esm.browser.js'),
+    format: 'es',
+    transpile: false,
+    env: 'development',
+    alias: { he: './entity-decoder' },
+    banner
+  },
+  // Runtime+compiler ES modules build (for direct import in browser)
+  'web-full-esm-browser-prod': {
+    entry: resolve('web/entry-runtime-with-compiler.js'),
+    dest: resolve('dist/vue.esm.browser.min.js'),
+    format: 'es',
+    transpile: false,
+    env: 'production',
+    alias: { he: './entity-decoder' },
+    banner
+  },
   // runtime-only build (Browser)
   'web-runtime-dev': {
     entry: resolve('web/entry-runtime.js'),
@@ -117,13 +154,21 @@ const builds = {
     plugins: [node(), cjs()]
   },
   // Web server renderer (CommonJS).
-  'web-server-renderer': {
+  'web-server-renderer-dev': {
     entry: resolve('web/entry-server-renderer.js'),
-    dest: resolve('packages/vue-server-renderer/build.js'),
+    dest: resolve('packages/vue-server-renderer/build.dev.js'),
     format: 'cjs',
+    env: 'development',
     external: Object.keys(require('../packages/vue-server-renderer/package.json').dependencies)
   },
-  'web-server-basic-renderer': {
+  'web-server-renderer-prod': {
+    entry: resolve('web/entry-server-renderer.js'),
+    dest: resolve('packages/vue-server-renderer/build.prod.js'),
+    format: 'cjs',
+    env: 'production',
+    external: Object.keys(require('../packages/vue-server-renderer/package.json').dependencies)
+  },
+  'web-server-renderer-basic': {
     entry: resolve('web/entry-server-basic-renderer.js'),
     dest: resolve('packages/vue-server-renderer/basic.js'),
     format: 'umd',
@@ -174,13 +219,7 @@ function genConfig (name) {
     input: opts.entry,
     external: opts.external,
     plugins: [
-      replace({
-        __WEEX__: !!opts.weex,
-        __WEEX_VERSION__: weexVersion,
-        __VERSION__: version
-      }),
       flow(),
-      buble(),
       alias(Object.assign({}, aliases, opts.alias))
     ].concat(opts.plugins || []),
     output: {
@@ -188,13 +227,32 @@ function genConfig (name) {
       format: opts.format,
       banner: opts.banner,
       name: opts.moduleName || 'Vue'
+    },
+    onwarn: (msg, warn) => {
+      if (!/Circular/.test(msg)) {
+        warn(msg)
+      }
     }
   }
 
+  // built-in vars
+  const vars = {
+    __WEEX__: !!opts.weex,
+    __WEEX_VERSION__: weexVersion,
+    __VERSION__: version
+  }
+  // feature flags
+  Object.keys(featureFlags).forEach(key => {
+    vars[`process.env.${key}`] = featureFlags[key]
+  })
+  // build-specific env
   if (opts.env) {
-    config.plugins.push(replace({
-      'process.env.NODE_ENV': JSON.stringify(opts.env)
-    }))
+    vars['process.env.NODE_ENV'] = JSON.stringify(opts.env)
+  }
+  config.plugins.push(replace(vars))
+
+  if (opts.transpile !== false) {
+    config.plugins.push(buble())
   }
 
   Object.defineProperty(config, '_name', {
diff --git a/scripts/feature-flags.js b/scripts/feature-flags.js
new file mode 100644
index 00000000000..7df14317ff1
--- /dev/null
+++ b/scripts/feature-flags.js
@@ -0,0 +1,4 @@
+module.exports = {
+  NEW_SLOT_SYNTAX: true,
+  VBIND_PROP_SHORTHAND: false
+}
diff --git a/scripts/get-weex-version.js b/scripts/get-weex-version.js
index d701c4320bc..f66492b37df 100644
--- a/scripts/get-weex-version.js
+++ b/scripts/get-weex-version.js
@@ -1,7 +1,7 @@
-var coreVersion = require('../package.json').version
-var weexVersion = require('../packages/weex-vue-framework/package.json').version
-var weexBaseVersion = weexVersion.match(/^[\d.]+/)[0]
-var weexSubVersion = Number(weexVersion.match(/-weex\.(\d+)$/)[1])
+const coreVersion = require('../package.json').version
+const weexVersion = require('../packages/weex-vue-framework/package.json').version
+let weexBaseVersion = weexVersion.match(/^[\d.]+/)[0]
+let weexSubVersion = Number(weexVersion.match(/-weex\.(\d+)$/)[1])
 
 if (weexBaseVersion === coreVersion) {
   // same core version, increment sub version
diff --git a/scripts/release-weex.sh b/scripts/release-weex.sh
index 3bb5412dd4f..f731977769f 100644
--- a/scripts/release-weex.sh
+++ b/scripts/release-weex.sh
@@ -1,6 +1,7 @@
+#!/bin/bash
 set -e
-CUR_VERSION=`node build/get-weex-version.js -c`
-NEXT_VERSION=`node build/get-weex-version.js`
+CUR_VERSION=$(node build/get-weex-version.js -c)
+NEXT_VERSION=$(node build/get-weex-version.js)
 
 echo "Current: $CUR_VERSION"
 read -p "Enter new version ($NEXT_VERSION): " -n 1 -r
@@ -20,15 +21,16 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
   WEEX_VERSION=$NEXT_VERSION npm run build:weex
 
   # update package
-  cd packages/weex-vue-framework
-  npm version $NEXT_VERSION
+  # using subshells to avoid having to cd back
+  ( cd packages/weex-vue-framework
+  npm version "$NEXT_VERSION"
   npm publish
-  cd -
+  )
 
-  cd packages/weex-template-compiler
-  npm version $NEXT_VERSION
+  ( cd packages/weex-template-compiler
+  npm version "$NEXT_VERSION"
   npm publish
-  cd -
+  )
 
   # commit
   git add packages/weex*
diff --git a/scripts/release.sh b/scripts/release.sh
index ea2acf2ff99..ad829313bb8 100644
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -1,8 +1,9 @@
+#!/bin/bash
 set -e
 
 if [[ -z $1 ]]; then
   echo "Enter new version: "
-  read VERSION
+  read -r VERSION
 else
   VERSION=$1
 fi
@@ -16,7 +17,7 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
     npm run lint
     npm run flow
     npm run test:cover
-    npm run test:e2e
+    npm run test:e2e -- --env phantomjs
     npm run test:ssr
   fi
 
@@ -32,45 +33,48 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
   VERSION=$VERSION npm run build
 
   # update packages
-  cd packages/vue-template-compiler
-  npm version $VERSION
+  # using subshells to avoid having to cd back
+  ( ( cd packages/vue-template-compiler
+  npm version "$VERSION"
   if [[ -z $RELEASE_TAG ]]; then
     npm publish
   else
-    npm publish --tag $RELEASE_TAG
+    npm publish --tag "$RELEASE_TAG"
   fi
-  cd -
+  )
 
   cd packages/vue-server-renderer
-  npm version $VERSION
+  npm version "$VERSION"
   if [[ -z $RELEASE_TAG ]]; then
     npm publish
   else
-    npm publish --tag $RELEASE_TAG
+    npm publish --tag "$RELEASE_TAG"
   fi
-  cd -
+  )
 
   # commit
   git add -A
   git add -f \
     dist/*.js \
     packages/vue-server-renderer/basic.js \
-    packages/vue-server-renderer/build.js \
+    packages/vue-server-renderer/build.dev.js \
+    packages/vue-server-renderer/build.prod.js \
     packages/vue-server-renderer/server-plugin.js \
     packages/vue-server-renderer/client-plugin.js \
-    packages/vue-template-compiler/build.js
+    packages/vue-template-compiler/build.js \
+    packages/vue-template-compiler/browser.js
   git commit -m "build: build $VERSION"
   # generate release note
   npm run release:note
   # tag version
-  npm version $VERSION --message "build: release $VERSION"
+  npm version "$VERSION" --message "build: release $VERSION"
 
   # publish
-  git push origin refs/tags/v$VERSION
+  git push origin refs/tags/v"$VERSION"
   git push
   if [[ -z $RELEASE_TAG ]]; then
     npm publish
   else
-    npm publish --tag $RELEASE_TAG
+    npm publish --tag "$RELEASE_TAG"
   fi
 fi
diff --git a/scripts/verify-commit-msg.js b/scripts/verify-commit-msg.js
index 34c2862cbde..2a72e49c4bd 100644
--- a/scripts/verify-commit-msg.js
+++ b/scripts/verify-commit-msg.js
@@ -2,7 +2,7 @@ const chalk = require('chalk')
 const msgPath = process.env.GIT_PARAMS
 const msg = require('fs').readFileSync(msgPath, 'utf-8').trim()
 
-const commitRE = /^(revert: )?(feat|fix|docs|style|refactor|perf|test|workflow|ci|chore|types)(\(.+\))?: .{1,50}/
+const commitRE = /^(revert: )?(feat|fix|polish|docs|style|refactor|perf|test|workflow|ci|chore|types|build)(\(.+\))?: .{1,50}/
 
 if (!commitRE.test(msg)) {
   console.log()
diff --git a/src/compiler/codeframe.js b/src/compiler/codeframe.js
new file mode 100644
index 00000000000..513d318fcc1
--- /dev/null
+++ b/src/compiler/codeframe.js
@@ -0,0 +1,50 @@
+/* @flow */
+
+const range = 2
+
+export function generateCodeFrame (
+  source: string,
+  start: number = 0,
+  end: number = source.length
+): string {
+  const lines = source.split(/\r?\n/)
+  let count = 0
+  const res = []
+  for (let i = 0; i < lines.length; i++) {
+    count += lines[i].length + 1
+    if (count >= start) {
+      for (let j = i - range; j <= i + range || end > count; j++) {
+        if (j < 0 || j >= lines.length) continue
+        res.push(`${j + 1}${repeat(` `, 3 - String(j + 1).length)}|  ${lines[j]}`)
+        const lineLength = lines[j].length
+        if (j === i) {
+          // push underline
+          const pad = start - (count - lineLength) + 1
+          const length = end > count ? lineLength - pad : end - start
+          res.push(`   |  ` + repeat(` `, pad) + repeat(`^`, length))
+        } else if (j > i) {
+          if (end > count) {
+            const length = Math.min(end - count, lineLength)
+            res.push(`   |  ` + repeat(`^`, length))
+          }
+          count += lineLength + 1
+        }
+      }
+      break
+    }
+  }
+  return res.join('\n')
+}
+
+function repeat (str, n) {
+  let result = ''
+  if (n > 0) {
+    while (true) { // eslint-disable-line
+      if (n & 1) result += str
+      n >>>= 1
+      if (n <= 0) break
+      str += str
+    }
+  }
+  return result
+}
diff --git a/src/compiler/codegen/events.js b/src/compiler/codegen/events.js
index 2b53c2333fd..4b0776115a0 100644
--- a/src/compiler/codegen/events.js
+++ b/src/compiler/codegen/events.js
@@ -1,9 +1,10 @@
 /* @flow */
 
-const fnExpRE = /^\s*([\w$_]+|\([^)]*?\))\s*=>|^function\s*\(/
-const simplePathRE = /^\s*[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['.*?']|\[".*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*\s*$/
+const fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/
+const fnInvokeRE = /\([^)]*?\);*$/
+const simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/
 
-// keyCode aliases
+// KeyboardEvent.keyCode aliases
 const keyCodes: { [key: string]: number | Array<number> } = {
   esc: 27,
   tab: 9,
@@ -16,6 +17,23 @@ const keyCodes: { [key: string]: number | Array<number> } = {
   'delete': [8, 46]
 }
 
+// KeyboardEvent.key aliases
+const keyNames: { [key: string]: string | Array<string> } = {
+  // #7880: IE11 and Edge use `Esc` for Escape key name.
+  esc: ['Esc', 'Escape'],
+  tab: 'Tab',
+  enter: 'Enter',
+  // #9112: IE11 uses `Spacebar` for Space key name.
+  space: [' ', 'Spacebar'],
+  // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
+  up: ['Up', 'ArrowUp'],
+  left: ['Left', 'ArrowLeft'],
+  right: ['Right', 'ArrowRight'],
+  down: ['Down', 'ArrowDown'],
+  // #9112: IE11 uses `Del` for Delete key name.
+  'delete': ['Backspace', 'Delete', 'Del']
+}
+
 // #4868: modifiers that prevent the execution of the listener
 // need to explicitly return null so that we can determine whether to remove
 // the listener for .once
@@ -36,14 +54,25 @@ const modifierCode: { [key: string]: string } = {
 
 export function genHandlers (
   events: ASTElementHandlers,
-  isNative: boolean,
-  warn: Function
+  isNative: boolean
 ): string {
-  let res = isNative ? 'nativeOn:{' : 'on:{'
+  const prefix = isNative ? 'nativeOn:' : 'on:'
+  let staticHandlers = ``
+  let dynamicHandlers = ``
   for (const name in events) {
-    res += `"${name}":${genHandler(name, events[name])},`
+    const handlerCode = genHandler(events[name])
+    if (events[name] && events[name].dynamic) {
+      dynamicHandlers += `${name},${handlerCode},`
+    } else {
+      staticHandlers += `"${name}":${handlerCode},`
+    }
+  }
+  staticHandlers = `{${staticHandlers.slice(0, -1)}}`
+  if (dynamicHandlers) {
+    return prefix + `_d(${staticHandlers},[${dynamicHandlers.slice(0, -1)}])`
+  } else {
+    return prefix + staticHandlers
   }
-  return res.slice(0, -1) + '}'
 }
 
 // Generate handler code with binding params on Weex
@@ -64,20 +93,18 @@ function genWeexHandler (params: Array<any>, handlerCode: string) {
     '}'
 }
 
-function genHandler (
-  name: string,
-  handler: ASTElementHandler | Array<ASTElementHandler>
-): string {
+function genHandler (handler: ASTElementHandler | Array<ASTElementHandler>): string {
   if (!handler) {
     return 'function(){}'
   }
 
   if (Array.isArray(handler)) {
-    return `[${handler.map(handler => genHandler(name, handler)).join(',')}]`
+    return `[${handler.map(handler => genHandler(handler)).join(',')}]`
   }
 
   const isMethodPath = simplePathRE.test(handler.value)
   const isFunctionExpression = fnExpRE.test(handler.value)
+  const isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''))
 
   if (!handler.modifiers) {
     if (isMethodPath || isFunctionExpression) {
@@ -87,7 +114,9 @@ function genHandler (
     if (__WEEX__ && handler.params) {
       return genWeexHandler(handler.params, handler.value)
     }
-    return `function($event){${handler.value}}` // inline statement
+    return `function($event){${
+      isFunctionInvocation ? `return ${handler.value}` : handler.value
+    }}` // inline statement
   } else {
     let code = ''
     let genModifierCode = ''
@@ -119,10 +148,12 @@ function genHandler (
       code += genModifierCode
     }
     const handlerCode = isMethodPath
-      ? handler.value + '($event)'
+      ? `return ${handler.value}.apply(null, arguments)`
       : isFunctionExpression
-        ? `(${handler.value})($event)`
-        : handler.value
+        ? `return (${handler.value}).apply(null, arguments)`
+        : isFunctionInvocation
+          ? `return ${handler.value}`
+          : handler.value
     /* istanbul ignore if */
     if (__WEEX__ && handler.params) {
       return genWeexHandler(handler.params, code + handlerCode)
@@ -132,7 +163,13 @@ function genHandler (
 }
 
 function genKeyFilter (keys: Array<string>): string {
-  return `if(!('button' in $event)&&${keys.map(genFilterCode).join('&&')})return null;`
+  return (
+    // make sure the key filters only apply to KeyboardEvents
+    // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
+    // key events that do not have keyCode property...
+    `if(!$event.type.indexOf('key')&&` +
+    `${keys.map(genFilterCode).join('&&')})return null;`
+  )
 }
 
 function genFilterCode (key: string): string {
@@ -140,11 +177,14 @@ function genFilterCode (key: string): string {
   if (keyVal) {
     return `$event.keyCode!==${keyVal}`
   }
-  const code = keyCodes[key]
+  const keyCode = keyCodes[key]
+  const keyName = keyNames[key]
   return (
     `_k($event.keyCode,` +
     `${JSON.stringify(key)},` +
-    `${JSON.stringify(code)},` +
-    `$event.key)`
+    `${JSON.stringify(keyCode)},` +
+    `$event.key,` +
+    `${JSON.stringify(keyName)}` +
+    `)`
   )
 }
diff --git a/src/compiler/codegen/index.js b/src/compiler/codegen/index.js
index 1c912c4d96f..cb6d1f9f1e6 100644
--- a/src/compiler/codegen/index.js
+++ b/src/compiler/codegen/index.js
@@ -4,6 +4,7 @@ import { genHandlers } from './events'
 import baseDirectives from '../directives/index'
 import { camelize, no, extend } from 'shared/util'
 import { baseWarn, pluckModuleFunction } from '../helpers'
+import { emptySlotScopeToken } from '../parser/index'
 
 type TransformFunction = (el: ASTElement, code: string) => string;
 type DataGenFunction = (el: ASTElement) => string;
@@ -18,6 +19,7 @@ export class CodegenState {
   maybeComponent: (el: ASTElement) => boolean;
   onceId: number;
   staticRenderFns: Array<string>;
+  pre: boolean;
 
   constructor (options: CompilerOptions) {
     this.options = options
@@ -26,9 +28,10 @@ export class CodegenState {
     this.dataGenFns = pluckModuleFunction(options.modules, 'genData')
     this.directives = extend(extend({}, baseDirectives), options.directives)
     const isReservedTag = options.isReservedTag || no
-    this.maybeComponent = (el: ASTElement) => !isReservedTag(el.tag)
+    this.maybeComponent = (el: ASTElement) => !!el.component || !isReservedTag(el.tag)
     this.onceId = 0
     this.staticRenderFns = []
+    this.pre = false
   }
 }
 
@@ -42,7 +45,8 @@ export function generate (
   options: CompilerOptions
 ): CodegenResult {
   const state = new CodegenState(options)
-  const code = ast ? genElement(ast, state) : '_c("div")'
+  // fix #11483, Root level <script> tags should not be rendered.
+  const code = ast ? (ast.tag === 'script' ? 'null' : genElement(ast, state)) : '_c("div")'
   return {
     render: `with(this){return ${code}}`,
     staticRenderFns: state.staticRenderFns
@@ -50,6 +54,10 @@ export function generate (
 }
 
 export function genElement (el: ASTElement, state: CodegenState): string {
+  if (el.parent) {
+    el.pre = el.pre || el.parent.pre
+  }
+
   if (el.staticRoot && !el.staticProcessed) {
     return genStatic(el, state)
   } else if (el.once && !el.onceProcessed) {
@@ -58,7 +66,7 @@ export function genElement (el: ASTElement, state: CodegenState): string {
     return genFor(el, state)
   } else if (el.if && !el.ifProcessed) {
     return genIf(el, state)
-  } else if (el.tag === 'template' && !el.slotTarget) {
+  } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
     return genChildren(el, state) || 'void 0'
   } else if (el.tag === 'slot') {
     return genSlot(el, state)
@@ -68,7 +76,10 @@ export function genElement (el: ASTElement, state: CodegenState): string {
     if (el.component) {
       code = genComponent(el.component, el, state)
     } else {
-      const data = el.plain ? undefined : genData(el, state)
+      let data
+      if (!el.plain || (el.pre && state.maybeComponent(el))) {
+        data = genData(el, state)
+      }
 
       const children = el.inlineTemplate ? null : genChildren(el, state, true)
       code = `_c('${el.tag}'${
@@ -88,7 +99,15 @@ export function genElement (el: ASTElement, state: CodegenState): string {
 // hoist static sub-trees out
 function genStatic (el: ASTElement, state: CodegenState): string {
   el.staticProcessed = true
+  // Some elements (templates) need to behave differently inside of a v-pre
+  // node.  All pre nodes are static roots, so we can use this as a location to
+  // wrap a state change and reset it upon exiting the pre node.
+  const originalPreState = state.pre
+  if (el.pre) {
+    state.pre = el.pre
+  }
   state.staticRenderFns.push(`with(this){return ${genElement(el, state)}}`)
+  state.pre = originalPreState
   return `_m(${
     state.staticRenderFns.length - 1
   }${
@@ -113,7 +132,8 @@ function genOnce (el: ASTElement, state: CodegenState): string {
     }
     if (!key) {
       process.env.NODE_ENV !== 'production' && state.warn(
-        `v-once can only be used inside v-for that is keyed. `
+        `v-once can only be used inside v-for that is keyed. `,
+        el.rawAttrsMap['v-once']
       )
       return genElement(el, state)
     }
@@ -184,7 +204,8 @@ export function genFor (
     state.warn(
       `<${el.tag} v-for="${alias} in ${exp}">: component lists rendered with ` +
       `v-for should have explicit keys. ` +
-      `See https://vuejs.org/guide/list.html#key for more info.`,
+      `See https://v2.vuejs.org/v2/guide/list.html#Maintaining-State for more info.`,
+      el.rawAttrsMap['v-for'],
       true /* tip */
     )
   }
@@ -229,18 +250,18 @@ export function genData (el: ASTElement, state: CodegenState): string {
   }
   // attributes
   if (el.attrs) {
-    data += `attrs:{${genProps(el.attrs)}},`
+    data += `attrs:${genProps(el.attrs)},`
   }
   // DOM props
   if (el.props) {
-    data += `domProps:{${genProps(el.props)}},`
+    data += `domProps:${genProps(el.props)},`
   }
   // event handlers
   if (el.events) {
-    data += `${genHandlers(el.events, false, state.warn)},`
+    data += `${genHandlers(el.events, false)},`
   }
   if (el.nativeEvents) {
-    data += `${genHandlers(el.nativeEvents, true, state.warn)},`
+    data += `${genHandlers(el.nativeEvents, true)},`
   }
   // slot target
   // only for non-scoped slots
@@ -249,7 +270,7 @@ export function genData (el: ASTElement, state: CodegenState): string {
   }
   // scoped slots
   if (el.scopedSlots) {
-    data += `${genScopedSlots(el.scopedSlots, state)},`
+    data += `${genScopedSlots(el, el.scopedSlots, state)},`
   }
   // component v-model
   if (el.model) {
@@ -269,6 +290,12 @@ export function genData (el: ASTElement, state: CodegenState): string {
     }
   }
   data = data.replace(/,$/, '') + '}'
+  // v-bind dynamic argument wrap
+  // v-bind with dynamic arguments must be applied using the same v-bind object
+  // merge helper so that class/style/mustUseProp attrs are handled correctly.
+  if (el.dynamicAttrs) {
+    data = `_b(${data},"${el.tag}",${genProps(el.dynamicAttrs)})`
+  }
   // v-bind data wrap
   if (el.wrapData) {
     data = el.wrapData(data)
@@ -300,7 +327,7 @@ function genDirectives (el: ASTElement, state: CodegenState): string | void {
       res += `{name:"${dir.name}",rawName:"${dir.rawName}"${
         dir.value ? `,value:(${dir.value}),expression:${JSON.stringify(dir.value)}` : ''
       }${
-        dir.arg ? `,arg:"${dir.arg}"` : ''
+        dir.arg ? `,arg:${dir.isDynamicArg ? dir.arg : `"${dir.arg}"`}` : ''
       }${
         dir.modifiers ? `,modifiers:${JSON.stringify(dir.modifiers)}` : ''
       }},`
@@ -316,9 +343,12 @@ function genInlineTemplate (el: ASTElement, state: CodegenState): ?string {
   if (process.env.NODE_ENV !== 'production' && (
     el.children.length !== 1 || ast.type !== 1
   )) {
-    state.warn('Inline-template components must have exactly one child element.')
+    state.warn(
+      'Inline-template components must have exactly one child element.',
+      { start: el.start }
+    )
   }
-  if (ast.type === 1) {
+  if (ast && ast.type === 1) {
     const inlineRenderFns = generate(ast, state.options)
     return `inlineTemplate:{render:function(){${
       inlineRenderFns.render
@@ -329,48 +359,106 @@ function genInlineTemplate (el: ASTElement, state: CodegenState): ?string {
 }
 
 function genScopedSlots (
+  el: ASTElement,
   slots: { [key: string]: ASTElement },
   state: CodegenState
 ): string {
-  return `scopedSlots:_u([${
-    Object.keys(slots).map(key => {
-      return genScopedSlot(key, slots[key], state)
-    }).join(',')
-  }])`
+  // by default scoped slots are considered "stable", this allows child
+  // components with only scoped slots to skip forced updates from parent.
+  // but in some cases we have to bail-out of this optimization
+  // for example if the slot contains dynamic names, has v-if or v-for on them...
+  let needsForceUpdate = el.for || Object.keys(slots).some(key => {
+    const slot = slots[key]
+    return (
+      slot.slotTargetDynamic ||
+      slot.if ||
+      slot.for ||
+      containsSlotChild(slot) // is passing down slot from parent which may be dynamic
+    )
+  })
+
+  // #9534: if a component with scoped slots is inside a conditional branch,
+  // it's possible for the same component to be reused but with different
+  // compiled slot content. To avoid that, we generate a unique key based on
+  // the generated code of all the slot contents.
+  let needsKey = !!el.if
+
+  // OR when it is inside another scoped slot or v-for (the reactivity may be
+  // disconnected due to the intermediate scope variable)
+  // #9438, #9506
+  // TODO: this can be further optimized by properly analyzing in-scope bindings
+  // and skip force updating ones that do not actually use scope variables.
+  if (!needsForceUpdate) {
+    let parent = el.parent
+    while (parent) {
+      if (
+        (parent.slotScope && parent.slotScope !== emptySlotScopeToken) ||
+        parent.for
+      ) {
+        needsForceUpdate = true
+        break
+      }
+      if (parent.if) {
+        needsKey = true
+      }
+      parent = parent.parent
+    }
+  }
+
+  const generatedSlots = Object.keys(slots)
+    .map(key => genScopedSlot(slots[key], state))
+    .join(',')
+
+  return `scopedSlots:_u([${generatedSlots}]${
+    needsForceUpdate ? `,null,true` : ``
+  }${
+    !needsForceUpdate && needsKey ? `,null,false,${hash(generatedSlots)}` : ``
+  })`
+}
+
+function hash(str) {
+  let hash = 5381
+  let i = str.length
+  while(i) {
+    hash = (hash * 33) ^ str.charCodeAt(--i)
+  }
+  return hash >>> 0
+}
+
+function containsSlotChild (el: ASTNode): boolean {
+  if (el.type === 1) {
+    if (el.tag === 'slot') {
+      return true
+    }
+    return el.children.some(containsSlotChild)
+  }
+  return false
 }
 
 function genScopedSlot (
-  key: string,
   el: ASTElement,
   state: CodegenState
 ): string {
+  const isLegacySyntax = el.attrsMap['slot-scope']
+  if (el.if && !el.ifProcessed && !isLegacySyntax) {
+    return genIf(el, state, genScopedSlot, `null`)
+  }
   if (el.for && !el.forProcessed) {
-    return genForScopedSlot(key, el, state)
+    return genFor(el, state, genScopedSlot)
   }
-  const fn = `function(${String(el.slotScope)}){` +
+  const slotScope = el.slotScope === emptySlotScopeToken
+    ? ``
+    : String(el.slotScope)
+  const fn = `function(${slotScope}){` +
     `return ${el.tag === 'template'
-      ? el.if
-        ? `${el.if}?${genChildren(el, state) || 'undefined'}:undefined`
+      ? el.if && isLegacySyntax
+        ? `(${el.if})?${genChildren(el, state) || 'undefined'}:undefined`
         : genChildren(el, state) || 'undefined'
       : genElement(el, state)
     }}`
-  return `{key:${key},fn:${fn}}`
-}
-
-function genForScopedSlot (
-  key: string,
-  el: any,
-  state: CodegenState
-): string {
-  const exp = el.for
-  const alias = el.alias
-  const iterator1 = el.iterator1 ? `,${el.iterator1}` : ''
-  const iterator2 = el.iterator2 ? `,${el.iterator2}` : ''
-  el.forProcessed = true // avoid recursion
-  return `_l((${exp}),` +
-    `function(${alias}${iterator1}${iterator2}){` +
-      `return ${genScopedSlot(key, el, state)}` +
-    '})'
+  // reverse proxy v-slot without scope on this.$slots
+  const reverseProxy = slotScope ? `` : `,proxy:true`
+  return `{key:${el.slotTarget || `"default"`},fn:${fn}${reverseProxy}}`
 }
 
 export function genChildren (
@@ -389,7 +477,10 @@ export function genChildren (
       el.tag !== 'template' &&
       el.tag !== 'slot'
     ) {
-      return (altGenElement || genElement)(el, state)
+      const normalizationType = checkSkip
+        ? state.maybeComponent(el) ? `,1` : `,0`
+        : ``
+      return `${(altGenElement || genElement)(el, state)}${normalizationType}`
     }
     const normalizationType = checkSkip
       ? getNormalizationType(children, state.maybeComponent)
@@ -435,7 +526,7 @@ function needsNormalization (el: ASTElement): boolean {
 function genNode (node: ASTNode, state: CodegenState): string {
   if (node.type === 1) {
     return genElement(node, state)
-  } if (node.type === 3 && node.isComment) {
+  } else if (node.type === 3 && node.isComment) {
     return genComment(node)
   } else {
     return genText(node)
@@ -456,8 +547,15 @@ export function genComment (comment: ASTText): string {
 function genSlot (el: ASTElement, state: CodegenState): string {
   const slotName = el.slotName || '"default"'
   const children = genChildren(el, state)
-  let res = `_t(${slotName}${children ? `,${children}` : ''}`
-  const attrs = el.attrs && `{${el.attrs.map(a => `${camelize(a.name)}:${a.value}`).join(',')}}`
+  let res = `_t(${slotName}${children ? `,function(){return ${children}}` : ''}`
+  const attrs = el.attrs || el.dynamicAttrs
+    ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(attr => ({
+        // slot props are camelized
+        name: camelize(attr.name),
+        value: attr.value,
+        dynamic: attr.dynamic
+      })))
+    : null
   const bind = el.attrsMap['v-bind']
   if ((attrs || bind) && !children) {
     res += `,null`
@@ -483,18 +581,26 @@ function genComponent (
   })`
 }
 
-function genProps (props: Array<{ name: string, value: any }>): string {
-  let res = ''
+function genProps (props: Array<ASTAttr>): string {
+  let staticProps = ``
+  let dynamicProps = ``
   for (let i = 0; i < props.length; i++) {
     const prop = props[i]
-    /* istanbul ignore if */
-    if (__WEEX__) {
-      res += `"${prop.name}":${generateValue(prop.value)},`
+    const value = __WEEX__
+      ? generateValue(prop.value)
+      : transformSpecialNewlines(prop.value)
+    if (prop.dynamic) {
+      dynamicProps += `${prop.name},${value},`
     } else {
-      res += `"${prop.name}":${transformSpecialNewlines(prop.value)},`
+      staticProps += `"${prop.name}":${value},`
     }
   }
-  return res.slice(0, -1)
+  staticProps = `{${staticProps.slice(0, -1)}}`
+  if (dynamicProps) {
+    return `_d(${staticProps},[${dynamicProps.slice(0, -1)}])`
+  } else {
+    return staticProps
+  }
 }
 
 /* istanbul ignore next */
diff --git a/src/compiler/create-compiler.js b/src/compiler/create-compiler.js
index 6671dcfe385..67d2057adf9 100644
--- a/src/compiler/create-compiler.js
+++ b/src/compiler/create-compiler.js
@@ -13,11 +13,29 @@ export function createCompilerCreator (baseCompile: Function): Function {
       const finalOptions = Object.create(baseOptions)
       const errors = []
       const tips = []
-      finalOptions.warn = (msg, tip) => {
+
+      let warn = (msg, range, tip) => {
         (tip ? tips : errors).push(msg)
       }
 
       if (options) {
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          // $flow-disable-line
+          const leadingSpaceLength = template.match(/^\s*/)[0].length
+
+          warn = (msg, range, tip) => {
+            const data: WarningMessage = { msg }
+            if (range) {
+              if (range.start != null) {
+                data.start = range.start + leadingSpaceLength
+              }
+              if (range.end != null) {
+                data.end = range.end + leadingSpaceLength
+              }
+            }
+            (tip ? tips : errors).push(data)
+          }
+        }
         // merge custom modules
         if (options.modules) {
           finalOptions.modules =
@@ -38,9 +56,11 @@ export function createCompilerCreator (baseCompile: Function): Function {
         }
       }
 
-      const compiled = baseCompile(template, finalOptions)
+      finalOptions.warn = warn
+
+      const compiled = baseCompile(template.trim(), finalOptions)
       if (process.env.NODE_ENV !== 'production') {
-        errors.push.apply(errors, detectErrors(compiled.ast))
+        detectErrors(compiled.ast, warn)
       }
       compiled.errors = errors
       compiled.tips = tips
diff --git a/src/compiler/directives/model.js b/src/compiler/directives/model.js
index 8c1f55bf663..c7a4c09b574 100644
--- a/src/compiler/directives/model.js
+++ b/src/compiler/directives/model.js
@@ -15,8 +15,8 @@ export function genComponentModel (
   if (trim) {
     valueExpression =
       `(typeof ${baseValueExpression} === 'string'` +
-        `? ${baseValueExpression}.trim()` +
-        `: ${baseValueExpression})`
+      `? ${baseValueExpression}.trim()` +
+      `: ${baseValueExpression})`
   }
   if (number) {
     valueExpression = `_n(${valueExpression})`
@@ -25,7 +25,7 @@ export function genComponentModel (
 
   el.model = {
     value: `(${value})`,
-    expression: `"${value}"`,
+    expression: JSON.stringify(value),
     callback: `function (${baseValueExpression}) {${assignment}}`
   }
 }
@@ -68,6 +68,9 @@ type ModelParseResult = {
 }
 
 export function parseModel (val: string): ModelParseResult {
+  // Fix https://github.com/vuejs/vue/pull/7730
+  // allow v-model="obj.val " (trailing whitespace)
+  val = val.trim()
   len = val.length
 
   if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
diff --git a/src/compiler/error-detector.js b/src/compiler/error-detector.js
index e729c499a33..05df8b27d54 100644
--- a/src/compiler/error-detector.js
+++ b/src/compiler/error-detector.js
@@ -2,6 +2,8 @@
 
 import { dirRE, onRE } from './parser/index'
 
+type Range = { start?: number, end?: number };
+
 // these keywords should not appear inside expressions, but operators like
 // typeof, instanceof and in are allowed
 const prohibitedKeywordRE = new RegExp('\\b' + (
@@ -19,90 +21,108 @@ const unaryOperatorsRE = new RegExp('\\b' + (
 const stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g
 
 // detect problematic expressions in a template
-export function detectErrors (ast: ?ASTNode): Array<string> {
-  const errors: Array<string> = []
+export function detectErrors (ast: ?ASTNode, warn: Function) {
   if (ast) {
-    checkNode(ast, errors)
+    checkNode(ast, warn)
   }
-  return errors
 }
 
-function checkNode (node: ASTNode, errors: Array<string>) {
+function checkNode (node: ASTNode, warn: Function) {
   if (node.type === 1) {
     for (const name in node.attrsMap) {
       if (dirRE.test(name)) {
         const value = node.attrsMap[name]
         if (value) {
+          const range = node.rawAttrsMap[name]
           if (name === 'v-for') {
-            checkFor(node, `v-for="${value}"`, errors)
+            checkFor(node, `v-for="${value}"`, warn, range)
+          } else if (name === 'v-slot' || name[0] === '#') {
+            checkFunctionParameterExpression(value, `${name}="${value}"`, warn, range)
           } else if (onRE.test(name)) {
-            checkEvent(value, `${name}="${value}"`, errors)
+            checkEvent(value, `${name}="${value}"`, warn, range)
           } else {
-            checkExpression(value, `${name}="${value}"`, errors)
+            checkExpression(value, `${name}="${value}"`, warn, range)
           }
         }
       }
     }
     if (node.children) {
       for (let i = 0; i < node.children.length; i++) {
-        checkNode(node.children[i], errors)
+        checkNode(node.children[i], warn)
       }
     }
   } else if (node.type === 2) {
-    checkExpression(node.expression, node.text, errors)
+    checkExpression(node.expression, node.text, warn, node)
   }
 }
 
-function checkEvent (exp: string, text: string, errors: Array<string>) {
-  const stipped = exp.replace(stripStringRE, '')
-  const keywordMatch: any = stipped.match(unaryOperatorsRE)
-  if (keywordMatch && stipped.charAt(keywordMatch.index - 1) !== '$') {
-    errors.push(
+function checkEvent (exp: string, text: string, warn: Function, range?: Range) {
+  const stripped = exp.replace(stripStringRE, '')
+  const keywordMatch: any = stripped.match(unaryOperatorsRE)
+  if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
+    warn(
       `avoid using JavaScript unary operator as property name: ` +
-      `"${keywordMatch[0]}" in expression ${text.trim()}`
+      `"${keywordMatch[0]}" in expression ${text.trim()}`,
+      range
     )
   }
-  checkExpression(exp, text, errors)
+  checkExpression(exp, text, warn, range)
 }
 
-function checkFor (node: ASTElement, text: string, errors: Array<string>) {
-  checkExpression(node.for || '', text, errors)
-  checkIdentifier(node.alias, 'v-for alias', text, errors)
-  checkIdentifier(node.iterator1, 'v-for iterator', text, errors)
-  checkIdentifier(node.iterator2, 'v-for iterator', text, errors)
+function checkFor (node: ASTElement, text: string, warn: Function, range?: Range) {
+  checkExpression(node.for || '', text, warn, range)
+  checkIdentifier(node.alias, 'v-for alias', text, warn, range)
+  checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range)
+  checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range)
 }
 
 function checkIdentifier (
   ident: ?string,
   type: string,
   text: string,
-  errors: Array<string>
+  warn: Function,
+  range?: Range
 ) {
   if (typeof ident === 'string') {
     try {
       new Function(`var ${ident}=_`)
     } catch (e) {
-      errors.push(`invalid ${type} "${ident}" in expression: ${text.trim()}`)
+      warn(`invalid ${type} "${ident}" in expression: ${text.trim()}`, range)
     }
   }
 }
 
-function checkExpression (exp: string, text: string, errors: Array<string>) {
+function checkExpression (exp: string, text: string, warn: Function, range?: Range) {
   try {
     new Function(`return ${exp}`)
   } catch (e) {
     const keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE)
     if (keywordMatch) {
-      errors.push(
+      warn(
         `avoid using JavaScript keyword as property name: ` +
-        `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`
+        `"${keywordMatch[0]}"\n  Raw expression: ${text.trim()}`,
+        range
       )
     } else {
-      errors.push(
+      warn(
         `invalid expression: ${e.message} in\n\n` +
         `    ${exp}\n\n` +
-        `  Raw expression: ${text.trim()}\n`
+        `  Raw expression: ${text.trim()}\n`,
+        range
       )
     }
   }
 }
+
+function checkFunctionParameterExpression (exp: string, text: string, warn: Function, range?: Range) {
+  try {
+    new Function(exp, '')
+  } catch (e) {
+    warn(
+      `invalid function parameter expression: ${e.message} in\n\n` +
+      `    ${exp}\n\n` +
+      `  Raw expression: ${text.trim()}\n`,
+      range
+    )
+  }
+}
diff --git a/src/compiler/helpers.js b/src/compiler/helpers.js
index 1d1feddbf01..7231d684cf4 100644
--- a/src/compiler/helpers.js
+++ b/src/compiler/helpers.js
@@ -3,9 +3,13 @@
 import { emptyObject } from 'shared/util'
 import { parseFilters } from './parser/filter-parser'
 
-export function baseWarn (msg: string) {
+type Range = { start?: number, end?: number };
+
+/* eslint-disable no-unused-vars */
+export function baseWarn (msg: string, range?: Range) {
   console.error(`[Vue compiler]: ${msg}`)
 }
+/* eslint-enable no-unused-vars */
 
 export function pluckModuleFunction<F: Function> (
   modules: ?Array<Object>,
@@ -16,20 +20,23 @@ export function pluckModuleFunction<F: Function> (
     : []
 }
 
-export function addProp (el: ASTElement, name: string, value: string) {
-  (el.props || (el.props = [])).push({ name, value })
+export function addProp (el: ASTElement, name: string, value: string, range?: Range, dynamic?: boolean) {
+  (el.props || (el.props = [])).push(rangeSetItem({ name, value, dynamic }, range))
   el.plain = false
 }
 
-export function addAttr (el: ASTElement, name: string, value: any) {
-  (el.attrs || (el.attrs = [])).push({ name, value })
+export function addAttr (el: ASTElement, name: string, value: any, range?: Range, dynamic?: boolean) {
+  const attrs = dynamic
+    ? (el.dynamicAttrs || (el.dynamicAttrs = []))
+    : (el.attrs || (el.attrs = []))
+  attrs.push(rangeSetItem({ name, value, dynamic }, range))
   el.plain = false
 }
 
 // add a raw attr (use this in preTransforms)
-export function addRawAttr (el: ASTElement, name: string, value: any) {
+export function addRawAttr (el: ASTElement, name: string, value: any, range?: Range) {
   el.attrsMap[name] = value
-  el.attrsList.push({ name, value })
+  el.attrsList.push(rangeSetItem({ name, value }, range))
 }
 
 export function addDirective (
@@ -38,19 +45,36 @@ export function addDirective (
   rawName: string,
   value: string,
   arg: ?string,
-  modifiers: ?ASTModifiers
+  isDynamicArg: boolean,
+  modifiers: ?ASTModifiers,
+  range?: Range
 ) {
-  (el.directives || (el.directives = [])).push({ name, rawName, value, arg, modifiers })
+  (el.directives || (el.directives = [])).push(rangeSetItem({
+    name,
+    rawName,
+    value,
+    arg,
+    isDynamicArg,
+    modifiers
+  }, range))
   el.plain = false
 }
 
+function prependModifierMarker (symbol: string, name: string, dynamic?: boolean): string {
+  return dynamic
+    ? `_p(${name},"${symbol}")`
+    : symbol + name // mark the event as captured
+}
+
 export function addHandler (
   el: ASTElement,
   name: string,
   value: string,
   modifiers: ?ASTModifiers,
   important?: boolean,
-  warn?: Function
+  warn?: ?Function,
+  range?: Range,
+  dynamic?: boolean
 ) {
   modifiers = modifiers || emptyObject
   // warn prevent and passive modifier
@@ -61,35 +85,42 @@ export function addHandler (
   ) {
     warn(
       'passive and prevent can\'t be used together. ' +
-      'Passive handler can\'t prevent default event.'
+      'Passive handler can\'t prevent default event.',
+      range
     )
   }
 
+  // normalize click.right and click.middle since they don't actually fire
+  // this is technically browser-specific, but at least for now browsers are
+  // the only target envs that have right/middle clicks.
+  if (modifiers.right) {
+    if (dynamic) {
+      name = `(${name})==='click'?'contextmenu':(${name})`
+    } else if (name === 'click') {
+      name = 'contextmenu'
+      delete modifiers.right
+    }
+  } else if (modifiers.middle) {
+    if (dynamic) {
+      name = `(${name})==='click'?'mouseup':(${name})`
+    } else if (name === 'click') {
+      name = 'mouseup'
+    }
+  }
+
   // check capture modifier
   if (modifiers.capture) {
     delete modifiers.capture
-    name = '!' + name // mark the event as captured
+    name = prependModifierMarker('!', name, dynamic)
   }
   if (modifiers.once) {
     delete modifiers.once
-    name = '~' + name // mark the event as once
+    name = prependModifierMarker('~', name, dynamic)
   }
   /* istanbul ignore if */
   if (modifiers.passive) {
     delete modifiers.passive
-    name = '&' + name // mark the event as passive
-  }
-
-  // normalize click.right and click.middle since they don't actually fire
-  // this is technically browser-specific, but at least for now browsers are
-  // the only target envs that have right/middle clicks.
-  if (name === 'click') {
-    if (modifiers.right) {
-      name = 'contextmenu'
-      delete modifiers.right
-    } else if (modifiers.middle) {
-      name = 'mouseup'
-    }
+    name = prependModifierMarker('&', name, dynamic)
   }
 
   let events
@@ -100,7 +131,7 @@ export function addHandler (
     events = el.events || (el.events = {})
   }
 
-  const newHandler: any = { value }
+  const newHandler: any = rangeSetItem({ value: value.trim(), dynamic }, range)
   if (modifiers !== emptyObject) {
     newHandler.modifiers = modifiers
   }
@@ -118,6 +149,15 @@ export function addHandler (
   el.plain = false
 }
 
+export function getRawBindingAttr (
+  el: ASTElement,
+  name: string
+) {
+  return el.rawAttrsMap[':' + name] ||
+    el.rawAttrsMap['v-bind:' + name] ||
+    el.rawAttrsMap[name]
+}
+
 export function getBindingAttr (
   el: ASTElement,
   name: string,
@@ -160,3 +200,32 @@ export function getAndRemoveAttr (
   }
   return val
 }
+
+export function getAndRemoveAttrByRegex (
+  el: ASTElement,
+  name: RegExp
+) {
+  const list = el.attrsList
+  for (let i = 0, l = list.length; i < l; i++) {
+    const attr = list[i]
+    if (name.test(attr.name)) {
+      list.splice(i, 1)
+      return attr
+    }
+  }
+}
+
+function rangeSetItem (
+  item: any,
+  range?: { start?: number, end?: number }
+) {
+  if (range) {
+    if (range.start != null) {
+      item.start = range.start
+    }
+    if (range.end != null) {
+      item.end = range.end
+    }
+  }
+  return item
+}
diff --git a/src/compiler/optimizer.js b/src/compiler/optimizer.js
index ce43203500a..5f56e74cdee 100644
--- a/src/compiler/optimizer.js
+++ b/src/compiler/optimizer.js
@@ -30,7 +30,7 @@ export function optimize (root: ?ASTElement, options: CompilerOptions) {
 
 function genStaticKeys (keys: string): Function {
   return makeMap(
-    'type,tag,attrsList,attrsMap,plain,parent,children,attrs' +
+    'type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' +
     (keys ? ',' + keys : '')
   )
 }
diff --git a/src/compiler/parser/filter-parser.js b/src/compiler/parser/filter-parser.js
index ca8ead850ae..10939d3fb34 100644
--- a/src/compiler/parser/filter-parser.js
+++ b/src/compiler/parser/filter-parser.js
@@ -92,6 +92,6 @@ function wrapFilter (exp: string, filter: string): string {
   } else {
     const name = filter.slice(0, i)
     const args = filter.slice(i + 1)
-    return `_f("${name}")(${exp},${args}`
+    return `_f("${name}")(${exp}${args !== ')' ? ',' + args : args}`
   }
 }
diff --git a/src/compiler/parser/html-parser.js b/src/compiler/parser/html-parser.js
index e2203613204..37c1fa24d58 100644
--- a/src/compiler/parser/html-parser.js
+++ b/src/compiler/parser/html-parser.js
@@ -5,32 +5,27 @@
 /*!
  * HTML Parser By John Resig (ejohn.org)
  * Modified by Juriy "kangax" Zaytsev
- * Original code by Erik Arvidsson, Mozilla Public License
+ * Original code by Erik Arvidsson (MPL-1.1 OR Apache-2.0 OR GPL-2.0-or-later)
  * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
  */
 
 import { makeMap, no } from 'shared/util'
 import { isNonPhrasingTag } from 'web/compiler/util'
+import { unicodeRegExp } from 'core/util/lang'
 
 // Regular Expressions for parsing tags and attributes
 const attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
-// could use https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
-// but for Vue templates we can enforce a simple charset
-const ncname = '[a-zA-Z_][\\w\\-\\.]*'
+const dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+?\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/
+const ncname = `[a-zA-Z_][\\-\\.0-9_a-zA-Z${unicodeRegExp.source}]*`
 const qnameCapture = `((?:${ncname}\\:)?${ncname})`
 const startTagOpen = new RegExp(`^<${qnameCapture}`)
 const startTagClose = /^\s*(\/?)>/
 const endTag = new RegExp(`^<\\/${qnameCapture}[^>]*>`)
 const doctype = /^<!DOCTYPE [^>]+>/i
-// #7298: escape - to avoid being pased as HTML comment when inlined in page
+// #7298: escape - to avoid being passed as HTML comment when inlined in page
 const comment = /^<!\--/
 const conditionalComment = /^<!\[/
 
-let IS_REGEX_CAPTURING_BROKEN = false
-'x'.replace(/x(.)?/g, function (m, g) {
-  IS_REGEX_CAPTURING_BROKEN = g === ''
-})
-
 // Special Elements (can contain anything)
 export const isPlainTextElement = makeMap('script,style,textarea', true)
 const reCache = {}
@@ -41,10 +36,11 @@ const decodingMap = {
   '&quot;': '"',
   '&amp;': '&',
   '&#10;': '\n',
-  '&#9;': '\t'
+  '&#9;': '\t',
+  '&#39;': "'"
 }
-const encodedAttr = /&(?:lt|gt|quot|amp);/g
-const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#10|#9);/g
+const encodedAttr = /&(?:lt|gt|quot|amp|#39);/g
+const encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g
 
 // #5992
 const isIgnoreNewlineTag = makeMap('pre,textarea', true)
@@ -74,7 +70,7 @@ export function parseHTML (html, options) {
 
           if (commentEnd >= 0) {
             if (options.shouldKeepComment) {
-              options.comment(html.substring(4, commentEnd))
+              options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3)
             }
             advance(commentEnd + 3)
             continue
@@ -111,7 +107,7 @@ export function parseHTML (html, options) {
         const startTagMatch = parseStartTag()
         if (startTagMatch) {
           handleStartTag(startTagMatch)
-          if (shouldIgnoreFirstNewline(lastTag, html)) {
+          if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
             advance(1)
           }
           continue
@@ -134,16 +130,18 @@ export function parseHTML (html, options) {
           rest = html.slice(textEnd)
         }
         text = html.substring(0, textEnd)
-        advance(textEnd)
       }
 
       if (textEnd < 0) {
         text = html
-        html = ''
+      }
+
+      if (text) {
+        advance(text.length)
       }
 
       if (options.chars && text) {
-        options.chars(text)
+        options.chars(text, index - text.length, index)
       }
     } else {
       let endTagLength = 0
@@ -172,7 +170,7 @@ export function parseHTML (html, options) {
     if (html === last) {
       options.chars && options.chars(html)
       if (process.env.NODE_ENV !== 'production' && !stack.length && options.warn) {
-        options.warn(`Mal-formatted tag at end of template: "${html}"`)
+        options.warn(`Mal-formatted tag at end of template: "${html}"`, { start: index + html.length })
       }
       break
     }
@@ -196,8 +194,10 @@ export function parseHTML (html, options) {
       }
       advance(start[0].length)
       let end, attr
-      while (!(end = html.match(startTagClose)) && (attr = html.match(attribute))) {
+      while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
+        attr.start = index
         advance(attr[0].length)
+        attr.end = index
         match.attrs.push(attr)
       }
       if (end) {
@@ -228,12 +228,6 @@ export function parseHTML (html, options) {
     const attrs = new Array(l)
     for (let i = 0; i < l; i++) {
       const args = match.attrs[i]
-      // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
-      if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
-        if (args[3] === '') { delete args[3] }
-        if (args[4] === '') { delete args[4] }
-        if (args[5] === '') { delete args[5] }
-      }
       const value = args[3] || args[4] || args[5] || ''
       const shouldDecodeNewlines = tagName === 'a' && args[1] === 'href'
         ? options.shouldDecodeNewlinesForHref
@@ -242,10 +236,14 @@ export function parseHTML (html, options) {
         name: args[1],
         value: decodeAttr(value, shouldDecodeNewlines)
       }
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        attrs[i].start = args.start + args[0].match(/^\s*/).length
+        attrs[i].end = args.end
+      }
     }
 
     if (!unary) {
-      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs })
+      stack.push({ tag: tagName, lowerCasedTag: tagName.toLowerCase(), attrs: attrs, start: match.start, end: match.end })
       lastTag = tagName
     }
 
@@ -259,12 +257,9 @@ export function parseHTML (html, options) {
     if (start == null) start = index
     if (end == null) end = index
 
-    if (tagName) {
-      lowerCasedTagName = tagName.toLowerCase()
-    }
-
     // Find the closest opened tag of the same type
     if (tagName) {
+      lowerCasedTagName = tagName.toLowerCase()
       for (pos = stack.length - 1; pos >= 0; pos--) {
         if (stack[pos].lowerCasedTag === lowerCasedTagName) {
           break
@@ -283,7 +278,8 @@ export function parseHTML (html, options) {
           options.warn
         ) {
           options.warn(
-            `tag <${stack[i].tag}> has no matching end tag.`
+            `tag <${stack[i].tag}> has no matching end tag.`,
+            { start: stack[i].start, end: stack[i].end }
           )
         }
         if (options.end) {
diff --git a/src/compiler/parser/index.js b/src/compiler/parser/index.js
index ba1b726870a..c4753e12996 100644
--- a/src/compiler/parser/index.js
+++ b/src/compiler/parser/index.js
@@ -5,7 +5,7 @@ import { parseHTML } from './html-parser'
 import { parseText } from './text-parser'
 import { parseFilters } from './filter-parser'
 import { genAssignmentCode } from '../directives/model'
-import { extend, cached, no, camelize } from 'shared/util'
+import { extend, cached, no, camelize, hyphenate } from 'shared/util'
 import { isIE, isEdge, isServerRendering } from 'core/util/env'
 
 import {
@@ -16,21 +16,36 @@ import {
   addDirective,
   getBindingAttr,
   getAndRemoveAttr,
-  pluckModuleFunction
+  getRawBindingAttr,
+  pluckModuleFunction,
+  getAndRemoveAttrByRegex
 } from '../helpers'
 
 export const onRE = /^@|^v-on:/
-export const dirRE = /^v-|^@|^:/
-export const forAliasRE = /(.*?)\s+(?:in|of)\s+(.*)/
+export const dirRE = process.env.VBIND_PROP_SHORTHAND
+  ? /^v-|^@|^:|^\.|^#/
+  : /^v-|^@|^:|^#/
+export const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/
 export const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/
 const stripParensRE = /^\(|\)$/g
+const dynamicArgRE = /^\[.*\]$/
 
 const argRE = /:(.*)$/
-export const bindRE = /^:|^v-bind:/
-const modifierRE = /\.[^.]+/g
+export const bindRE = /^:|^\.|^v-bind:/
+const propBindRE = /^\./
+const modifierRE = /\.[^.\]]+(?=[^\]]*$)/g
+
+const slotRE = /^v-slot(:|$)|^#/
+
+const lineBreakRE = /[\r\n]/
+const whitespaceRE = /[ \f\t\r\n]+/g
+
+const invalidAttributeRE = /[\s"'<>\/=]/
 
 const decodeHTMLCached = cached(he.decode)
 
+export const emptySlotScopeToken = `_empty_`
+
 // configurable state
 export let warn: any
 let delimiters
@@ -40,12 +55,11 @@ let postTransforms
 let platformIsPreTag
 let platformMustUseProp
 let platformGetTagNamespace
-
-type Attr = { name: string; value: string };
+let maybeComponent
 
 export function createASTElement (
   tag: string,
-  attrs: Array<Attr>,
+  attrs: Array<ASTAttr>,
   parent: ASTElement | void
 ): ASTElement {
   return {
@@ -53,6 +67,7 @@ export function createASTElement (
     tag,
     attrsList: attrs,
     attrsMap: makeAttrsMap(attrs),
+    rawAttrsMap: {},
     parent,
     children: []
   }
@@ -70,7 +85,13 @@ export function parse (
   platformIsPreTag = options.isPreTag || no
   platformMustUseProp = options.mustUseProp || no
   platformGetTagNamespace = options.getTagNamespace || no
-
+  const isReservedTag = options.isReservedTag || no
+  maybeComponent = (el: ASTElement) => !!(
+    el.component ||
+    el.attrsMap[':is'] ||
+    el.attrsMap['v-bind:is'] ||
+    !(el.attrsMap.is ? isReservedTag(el.attrsMap.is) : isReservedTag(el.tag))
+  )
   transforms = pluckModuleFunction(options.modules, 'transformNode')
   preTransforms = pluckModuleFunction(options.modules, 'preTransformNode')
   postTransforms = pluckModuleFunction(options.modules, 'postTransformNode')
@@ -79,20 +100,67 @@ export function parse (
 
   const stack = []
   const preserveWhitespace = options.preserveWhitespace !== false
+  const whitespaceOption = options.whitespace
   let root
   let currentParent
   let inVPre = false
   let inPre = false
   let warned = false
 
-  function warnOnce (msg) {
+  function warnOnce (msg, range) {
     if (!warned) {
       warned = true
-      warn(msg)
+      warn(msg, range)
     }
   }
 
   function closeElement (element) {
+    trimEndingWhitespace(element)
+    if (!inVPre && !element.processed) {
+      element = processElement(element, options)
+    }
+    // tree management
+    if (!stack.length && element !== root) {
+      // allow root elements with v-if, v-else-if and v-else
+      if (root.if && (element.elseif || element.else)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(element)
+        }
+        addIfCondition(root, {
+          exp: element.elseif,
+          block: element
+        })
+      } else if (process.env.NODE_ENV !== 'production') {
+        warnOnce(
+          `Component template should contain exactly one root element. ` +
+          `If you are using v-if on multiple elements, ` +
+          `use v-else-if to chain them instead.`,
+          { start: element.start }
+        )
+      }
+    }
+    if (currentParent && !element.forbidden) {
+      if (element.elseif || element.else) {
+        processIfConditions(element, currentParent)
+      } else {
+        if (element.slotScope) {
+          // scoped slot
+          // keep it in the children list so that v-else(-if) conditions can
+          // find it as the prev node.
+          const name = element.slotTarget || '"default"'
+          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element
+        }
+        currentParent.children.push(element)
+        element.parent = currentParent
+      }
+    }
+
+    // final children cleanup
+    // filter out scoped slots
+    element.children = element.children.filter(c => !(c: any).slotScope)
+    // remove trailing whitespace node again
+    trimEndingWhitespace(element)
+
     // check pre state
     if (element.pre) {
       inVPre = false
@@ -106,6 +174,37 @@ export function parse (
     }
   }
 
+  function trimEndingWhitespace (el) {
+    // remove trailing whitespace node
+    if (!inPre) {
+      let lastNode
+      while (
+        (lastNode = el.children[el.children.length - 1]) &&
+        lastNode.type === 3 &&
+        lastNode.text === ' '
+      ) {
+        el.children.pop()
+      }
+    }
+  }
+
+  function checkRootConstraints (el) {
+    if (el.tag === 'slot' || el.tag === 'template') {
+      warnOnce(
+        `Cannot use <${el.tag}> as component root element because it may ` +
+        'contain multiple nodes.',
+        { start: el.start }
+      )
+    }
+    if (el.attrsMap.hasOwnProperty('v-for')) {
+      warnOnce(
+        'Cannot use v-for on stateful component root element because ' +
+        'it renders multiple elements.',
+        el.rawAttrsMap['v-for']
+      )
+    }
+  }
+
   parseHTML(template, {
     warn,
     expectHTML: options.expectHTML,
@@ -114,7 +213,8 @@ export function parse (
     shouldDecodeNewlines: options.shouldDecodeNewlines,
     shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
     shouldKeepComment: options.comments,
-    start (tag, attrs, unary) {
+    outputSourceRange: options.outputSourceRange,
+    start (tag, attrs, unary, start, end) {
       // check namespace.
       // inherit parent ns if there is one
       const ns = (currentParent && currentParent.ns) || platformGetTagNamespace(tag)
@@ -130,12 +230,36 @@ export function parse (
         element.ns = ns
       }
 
+      if (process.env.NODE_ENV !== 'production') {
+        if (options.outputSourceRange) {
+          element.start = start
+          element.end = end
+          element.rawAttrsMap = element.attrsList.reduce((cumulated, attr) => {
+            cumulated[attr.name] = attr
+            return cumulated
+          }, {})
+        }
+        attrs.forEach(attr => {
+          if (invalidAttributeRE.test(attr.name)) {
+            warn(
+              `Invalid dynamic argument expression: attribute names cannot contain ` +
+              `spaces, quotes, <, >, / or =.`,
+              {
+                start: attr.start + attr.name.indexOf(`[`),
+                end: attr.start + attr.name.length
+              }
+            )
+          }
+        })
+      }
+
       if (isForbiddenTag(element) && !isServerRendering()) {
         element.forbidden = true
         process.env.NODE_ENV !== 'production' && warn(
           'Templates should only be responsible for mapping the state to the ' +
           'UI. Avoid placing tags with side-effects in your templates, such as ' +
-          `<${tag}>` + ', as they will not be parsed.'
+          `<${tag}>` + ', as they will not be parsed.',
+          { start: element.start }
         )
       }
 
@@ -160,59 +284,15 @@ export function parse (
         processFor(element)
         processIf(element)
         processOnce(element)
-        // element-scope stuff
-        processElement(element, options)
-      }
-
-      function checkRootConstraints (el) {
-        if (process.env.NODE_ENV !== 'production') {
-          if (el.tag === 'slot' || el.tag === 'template') {
-            warnOnce(
-              `Cannot use <${el.tag}> as component root element because it may ` +
-              'contain multiple nodes.'
-            )
-          }
-          if (el.attrsMap.hasOwnProperty('v-for')) {
-            warnOnce(
-              'Cannot use v-for on stateful component root element because ' +
-              'it renders multiple elements.'
-            )
-          }
-        }
       }
 
-      // tree management
       if (!root) {
         root = element
-        checkRootConstraints(root)
-      } else if (!stack.length) {
-        // allow root elements with v-if, v-else-if and v-else
-        if (root.if && (element.elseif || element.else)) {
-          checkRootConstraints(element)
-          addIfCondition(root, {
-            exp: element.elseif,
-            block: element
-          })
-        } else if (process.env.NODE_ENV !== 'production') {
-          warnOnce(
-            `Component template should contain exactly one root element. ` +
-            `If you are using v-if on multiple elements, ` +
-            `use v-else-if to chain them instead.`
-          )
-        }
-      }
-      if (currentParent && !element.forbidden) {
-        if (element.elseif || element.else) {
-          processIfConditions(element, currentParent)
-        } else if (element.slotScope) { // scoped slot
-          currentParent.plain = false
-          const name = element.slotTarget || '"default"'
-          ;(currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element
-        } else {
-          currentParent.children.push(element)
-          element.parent = currentParent
+        if (process.env.NODE_ENV !== 'production') {
+          checkRootConstraints(root)
         }
       }
+
       if (!unary) {
         currentParent = element
         stack.push(element)
@@ -221,29 +301,29 @@ export function parse (
       }
     },
 
-    end () {
-      // remove trailing whitespace
+    end (tag, start, end) {
       const element = stack[stack.length - 1]
-      const lastNode = element.children[element.children.length - 1]
-      if (lastNode && lastNode.type === 3 && lastNode.text === ' ' && !inPre) {
-        element.children.pop()
-      }
       // pop stack
       stack.length -= 1
       currentParent = stack[stack.length - 1]
+      if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+        element.end = end
+      }
       closeElement(element)
     },
 
-    chars (text: string) {
+    chars (text: string, start: number, end: number) {
       if (!currentParent) {
         if (process.env.NODE_ENV !== 'production') {
           if (text === template) {
             warnOnce(
-              'Component template requires a root element, rather than just text.'
+              'Component template requires a root element, rather than just text.',
+              { start }
             )
           } else if ((text = text.trim())) {
             warnOnce(
-              `text "${text}" outside root element will be ignored.`
+              `text "${text}" outside root element will be ignored.`,
+              { start }
             )
           }
         }
@@ -258,33 +338,66 @@ export function parse (
         return
       }
       const children = currentParent.children
-      text = inPre || text.trim()
-        ? isTextTag(currentParent) ? text : decodeHTMLCached(text)
-        // only preserve whitespace if its not right after a starting tag
-        : preserveWhitespace && children.length ? ' ' : ''
+      if (inPre || text.trim()) {
+        text = isTextTag(currentParent) ? text : decodeHTMLCached(text)
+      } else if (!children.length) {
+        // remove the whitespace-only node right after an opening tag
+        text = ''
+      } else if (whitespaceOption) {
+        if (whitespaceOption === 'condense') {
+          // in condense mode, remove the whitespace node if it contains
+          // line break, otherwise condense to a single space
+          text = lineBreakRE.test(text) ? '' : ' '
+        } else {
+          text = ' '
+        }
+      } else {
+        text = preserveWhitespace ? ' ' : ''
+      }
       if (text) {
+        if (!inPre && whitespaceOption === 'condense') {
+          // condense consecutive whitespaces into single space
+          text = text.replace(whitespaceRE, ' ')
+        }
         let res
+        let child: ?ASTNode
         if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
-          children.push({
+          child = {
             type: 2,
             expression: res.expression,
             tokens: res.tokens,
             text
-          })
+          }
         } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
-          children.push({
+          child = {
             type: 3,
             text
-          })
+          }
+        }
+        if (child) {
+          if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+            child.start = start
+            child.end = end
+          }
+          children.push(child)
         }
       }
     },
-    comment (text: string) {
-      currentParent.children.push({
-        type: 3,
-        text,
-        isComment: true
-      })
+    comment (text: string, start, end) {
+      // adding anything as a sibling to the root node is forbidden
+      // comments should still be allowed, but ignored
+      if (currentParent) {
+        const child: ASTText = {
+          type: 3,
+          text,
+          isComment: true
+        }
+        if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+          child.start = start
+          child.end = end
+        }
+        currentParent.children.push(child)
+      }
     }
   })
   return root
@@ -297,13 +410,18 @@ function processPre (el) {
 }
 
 function processRawAttrs (el) {
-  const l = el.attrsList.length
-  if (l) {
-    const attrs = el.attrs = new Array(l)
-    for (let i = 0; i < l; i++) {
+  const list = el.attrsList
+  const len = list.length
+  if (len) {
+    const attrs: Array<ASTAttr> = el.attrs = new Array(len)
+    for (let i = 0; i < len; i++) {
       attrs[i] = {
-        name: el.attrsList[i].name,
-        value: JSON.stringify(el.attrsList[i].value)
+        name: list[i].name,
+        value: JSON.stringify(list[i].value)
+      }
+      if (list[i].start != null) {
+        attrs[i].start = list[i].start
+        attrs[i].end = list[i].end
       }
     }
   } else if (!el.pre) {
@@ -312,27 +430,53 @@ function processRawAttrs (el) {
   }
 }
 
-export function processElement (element: ASTElement, options: CompilerOptions) {
+export function processElement (
+  element: ASTElement,
+  options: CompilerOptions
+) {
   processKey(element)
 
   // determine whether this is a plain element after
   // removing structural attributes
-  element.plain = !element.key && !element.attrsList.length
+  element.plain = (
+    !element.key &&
+    !element.scopedSlots &&
+    !element.attrsList.length
+  )
 
   processRef(element)
-  processSlot(element)
+  processSlotContent(element)
+  processSlotOutlet(element)
   processComponent(element)
   for (let i = 0; i < transforms.length; i++) {
     element = transforms[i](element, options) || element
   }
   processAttrs(element)
+  return element
 }
 
 function processKey (el) {
   const exp = getBindingAttr(el, 'key')
   if (exp) {
-    if (process.env.NODE_ENV !== 'production' && el.tag === 'template') {
-      warn(`<template> cannot be keyed. Place the key on real elements instead.`)
+    if (process.env.NODE_ENV !== 'production') {
+      if (el.tag === 'template') {
+        warn(
+          `<template> cannot be keyed. Place the key on real elements instead.`,
+          getRawBindingAttr(el, 'key')
+        )
+      }
+      if (el.for) {
+        const iterator = el.iterator2 || el.iterator1
+        const parent = el.parent
+        if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
+          warn(
+            `Do not use v-for index as key on <transition-group> children, ` +
+            `this is the same as not using keys.`,
+            getRawBindingAttr(el, 'key'),
+            true /* tip */
+          )
+        }
+      }
     }
     el.key = exp
   }
@@ -354,7 +498,8 @@ export function processFor (el: ASTElement) {
       extend(el, res)
     } else if (process.env.NODE_ENV !== 'production') {
       warn(
-        `Invalid v-for expression: ${exp}`
+        `Invalid v-for expression: ${exp}`,
+        el.rawAttrsMap['v-for']
       )
     }
   }
@@ -375,7 +520,7 @@ export function parseFor (exp: string): ?ForParseResult {
   const alias = inMatch[1].trim().replace(stripParensRE, '')
   const iteratorMatch = alias.match(forIteratorRE)
   if (iteratorMatch) {
-    res.alias = alias.replace(forIteratorRE, '')
+    res.alias = alias.replace(forIteratorRE, '').trim()
     res.iterator1 = iteratorMatch[1].trim()
     if (iteratorMatch[2]) {
       res.iterator2 = iteratorMatch[2].trim()
@@ -415,7 +560,8 @@ function processIfConditions (el, parent) {
   } else if (process.env.NODE_ENV !== 'production') {
     warn(
       `v-${el.elseif ? ('else-if="' + el.elseif + '"') : 'else'} ` +
-      `used on element <${el.tag}> without corresponding v-if.`
+      `used on element <${el.tag}> without corresponding v-if.`,
+      el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']
     )
   }
 }
@@ -429,7 +575,8 @@ function findPrevElement (children: Array<any>): ASTElement | void {
       if (process.env.NODE_ENV !== 'production' && children[i].text !== ' ') {
         warn(
           `text "${children[i].text.trim()}" between v-if and v-else(-if) ` +
-          `will be ignored.`
+          `will be ignored.`,
+          children[i]
         )
       }
       children.pop()
@@ -451,51 +598,153 @@ function processOnce (el) {
   }
 }
 
-function processSlot (el) {
-  if (el.tag === 'slot') {
-    el.slotName = getBindingAttr(el, 'name')
-    if (process.env.NODE_ENV !== 'production' && el.key) {
+// handle content being passed to a component as slot,
+// e.g. <template slot="xxx">, <div slot-scope="xxx">
+function processSlotContent (el) {
+  let slotScope
+  if (el.tag === 'template') {
+    slotScope = getAndRemoveAttr(el, 'scope')
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && slotScope) {
       warn(
-        `\`key\` does not work on <slot> because slots are abstract outlets ` +
-        `and can possibly expand into multiple elements. ` +
-        `Use the key on a wrapping element instead.`
+        `the "scope" attribute for scoped slots have been deprecated and ` +
+        `replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ` +
+        `can also be used on plain elements in addition to <template> to ` +
+        `denote scoped slots.`,
+        el.rawAttrsMap['scope'],
+        true
       )
     }
-  } else {
-    let slotScope
+    el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope')
+  } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
+    /* istanbul ignore if */
+    if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
+      warn(
+        `Ambiguous combined usage of slot-scope and v-for on <${el.tag}> ` +
+        `(v-for takes higher priority). Use a wrapper <template> for the ` +
+        `scoped slot to make it clearer.`,
+        el.rawAttrsMap['slot-scope'],
+        true
+      )
+    }
+    el.slotScope = slotScope
+  }
+
+  // slot="xxx"
+  const slotTarget = getBindingAttr(el, 'slot')
+  if (slotTarget) {
+    el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget
+    el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot'])
+    // preserve slot as an attribute for native shadow DOM compat
+    // only for non-scoped slots.
+    if (el.tag !== 'template' && !el.slotScope) {
+      addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'))
+    }
+  }
+
+  // 2.6 v-slot syntax
+  if (process.env.NEW_SLOT_SYNTAX) {
     if (el.tag === 'template') {
-      slotScope = getAndRemoveAttr(el, 'scope')
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && slotScope) {
-        warn(
-          `the "scope" attribute for scoped slots have been deprecated and ` +
-          `replaced by "slot-scope" since 2.5. The new "slot-scope" attribute ` +
-          `can also be used on plain elements in addition to <template> to ` +
-          `denote scoped slots.`,
-          true
-        )
+      // v-slot on <template>
+      const slotBinding = getAndRemoveAttrByRegex(el, slotRE)
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (el.slotTarget || el.slotScope) {
+            warn(
+              `Unexpected mixed usage of different slot syntaxes.`,
+              el
+            )
+          }
+          if (el.parent && !maybeComponent(el.parent)) {
+            warn(
+              `<template v-slot> can only appear at the root level inside ` +
+              `the receiving component`,
+              el
+            )
+          }
+        }
+        const { name, dynamic } = getSlotName(slotBinding)
+        el.slotTarget = name
+        el.slotTargetDynamic = dynamic
+        el.slotScope = slotBinding.value || emptySlotScopeToken // force it into a scoped slot for perf
       }
-      el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope')
-    } else if ((slotScope = getAndRemoveAttr(el, 'slot-scope'))) {
-      /* istanbul ignore if */
-      if (process.env.NODE_ENV !== 'production' && el.attrsMap['v-for']) {
-        warn(
-          `Ambiguous combined usage of slot-scope and v-for on <${el.tag}> ` +
-          `(v-for takes higher priority). Use a wrapper <template> for the ` +
-          `scoped slot to make it clearer.`,
-          true
-        )
+    } else {
+      // v-slot on component, denotes default slot
+      const slotBinding = getAndRemoveAttrByRegex(el, slotRE)
+      if (slotBinding) {
+        if (process.env.NODE_ENV !== 'production') {
+          if (!maybeComponent(el)) {
+            warn(
+              `v-slot can only be used on components or <template>.`,
+              slotBinding
+            )
+          }
+          if (el.slotScope || el.slotTarget) {
+            warn(
+              `Unexpected mixed usage of different slot syntaxes.`,
+              el
+            )
+          }
+          if (el.scopedSlots) {
+            warn(
+              `To avoid scope ambiguity, the default slot should also use ` +
+              `<template> syntax when there are other named slots.`,
+              slotBinding
+            )
+          }
+        }
+        // add the component's children to its default slot
+        const slots = el.scopedSlots || (el.scopedSlots = {})
+        const { name, dynamic } = getSlotName(slotBinding)
+        const slotContainer = slots[name] = createASTElement('template', [], el)
+        slotContainer.slotTarget = name
+        slotContainer.slotTargetDynamic = dynamic
+        slotContainer.children = el.children.filter((c: any) => {
+          if (!c.slotScope) {
+            c.parent = slotContainer
+            return true
+          }
+        })
+        slotContainer.slotScope = slotBinding.value || emptySlotScopeToken
+        // remove children as they are returned from scopedSlots now
+        el.children = []
+        // mark el non-plain so data gets generated
+        el.plain = false
       }
-      el.slotScope = slotScope
     }
-    const slotTarget = getBindingAttr(el, 'slot')
-    if (slotTarget) {
-      el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget
-      // preserve slot as an attribute for native shadow DOM compat
-      // only for non-scoped slots.
-      if (el.tag !== 'template' && !el.slotScope) {
-        addAttr(el, 'slot', slotTarget)
-      }
+  }
+}
+
+function getSlotName (binding) {
+  let name = binding.name.replace(slotRE, '')
+  if (!name) {
+    if (binding.name[0] !== '#') {
+      name = 'default'
+    } else if (process.env.NODE_ENV !== 'production') {
+      warn(
+        `v-slot shorthand syntax requires a slot name.`,
+        binding
+      )
+    }
+  }
+  return dynamicArgRE.test(name)
+    // dynamic [name]
+    ? { name: name.slice(1, -1), dynamic: true }
+    // static name
+    : { name: `"${name}"`, dynamic: false }
+}
+
+// handle <slot/> outlets
+function processSlotOutlet (el) {
+  if (el.tag === 'slot') {
+    el.slotName = getBindingAttr(el, 'name')
+    if (process.env.NODE_ENV !== 'production' && el.key) {
+      warn(
+        `\`key\` does not work on <slot> because slots are abstract outlets ` +
+        `and can possibly expand into multiple elements. ` +
+        `Use the key on a wrapping element instead.`,
+        getRawBindingAttr(el, 'key')
+      )
     }
   }
 }
@@ -512,7 +761,7 @@ function processComponent (el) {
 
 function processAttrs (el) {
   const list = el.attrsList
-  let i, l, name, rawName, value, modifiers, isProp
+  let i, l, name, rawName, value, modifiers, syncGen, isDynamic
   for (i = 0, l = list.length; i < l; i++) {
     name = rawName = list[i].name
     value = list[i].value
@@ -520,50 +769,103 @@ function processAttrs (el) {
       // mark element as dynamic
       el.hasBindings = true
       // modifiers
-      modifiers = parseModifiers(name)
-      if (modifiers) {
+      modifiers = parseModifiers(name.replace(dirRE, ''))
+      // support .foo shorthand syntax for the .prop modifier
+      if (process.env.VBIND_PROP_SHORTHAND && propBindRE.test(name)) {
+        (modifiers || (modifiers = {})).prop = true
+        name = `.` + name.slice(1).replace(modifierRE, '')
+      } else if (modifiers) {
         name = name.replace(modifierRE, '')
       }
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '')
         value = parseFilters(value)
-        isProp = false
+        isDynamic = dynamicArgRE.test(name)
+        if (isDynamic) {
+          name = name.slice(1, -1)
+        }
+        if (
+          process.env.NODE_ENV !== 'production' &&
+          value.trim().length === 0
+        ) {
+          warn(
+            `The value for a v-bind expression cannot be empty. Found in "v-bind:${name}"`
+          )
+        }
         if (modifiers) {
-          if (modifiers.prop) {
-            isProp = true
+          if (modifiers.prop && !isDynamic) {
             name = camelize(name)
             if (name === 'innerHtml') name = 'innerHTML'
           }
-          if (modifiers.camel) {
+          if (modifiers.camel && !isDynamic) {
             name = camelize(name)
           }
           if (modifiers.sync) {
-            addHandler(
-              el,
-              `update:${camelize(name)}`,
-              genAssignmentCode(value, `$event`)
-            )
+            syncGen = genAssignmentCode(value, `$event`)
+            if (!isDynamic) {
+              addHandler(
+                el,
+                `update:${camelize(name)}`,
+                syncGen,
+                null,
+                false,
+                warn,
+                list[i]
+              )
+              if (hyphenate(name) !== camelize(name)) {
+                addHandler(
+                  el,
+                  `update:${hyphenate(name)}`,
+                  syncGen,
+                  null,
+                  false,
+                  warn,
+                  list[i]
+                )
+              }
+            } else {
+              // handler w/ dynamic event name
+              addHandler(
+                el,
+                `"update:"+(${name})`,
+                syncGen,
+                null,
+                false,
+                warn,
+                list[i],
+                true // dynamic
+              )
+            }
           }
         }
-        if (isProp || (
+        if ((modifiers && modifiers.prop) || (
           !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)
         )) {
-          addProp(el, name, value)
+          addProp(el, name, value, list[i], isDynamic)
         } else {
-          addAttr(el, name, value)
+          addAttr(el, name, value, list[i], isDynamic)
         }
       } else if (onRE.test(name)) { // v-on
         name = name.replace(onRE, '')
-        addHandler(el, name, value, modifiers, false, warn)
+        isDynamic = dynamicArgRE.test(name)
+        if (isDynamic) {
+          name = name.slice(1, -1)
+        }
+        addHandler(el, name, value, modifiers, false, warn, list[i], isDynamic)
       } else { // normal directives
         name = name.replace(dirRE, '')
         // parse arg
         const argMatch = name.match(argRE)
-        const arg = argMatch && argMatch[1]
+        let arg = argMatch && argMatch[1]
+        isDynamic = false
         if (arg) {
           name = name.slice(0, -(arg.length + 1))
+          if (dynamicArgRE.test(arg)) {
+            arg = arg.slice(1, -1)
+            isDynamic = true
+          }
         }
-        addDirective(el, name, rawName, value, arg, modifiers)
+        addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i])
         if (process.env.NODE_ENV !== 'production' && name === 'model') {
           checkForAliasModel(el, value)
         }
@@ -577,17 +879,18 @@ function processAttrs (el) {
             `${name}="${value}": ` +
             'Interpolation inside attributes has been removed. ' +
             'Use v-bind or the colon shorthand instead. For example, ' +
-            'instead of <div id="{{ val }}">, use <div :id="val">.'
+            'instead of <div id="{{ val }}">, use <div :id="val">.',
+            list[i]
           )
         }
       }
-      addAttr(el, name, JSON.stringify(value))
+      addAttr(el, name, JSON.stringify(value), list[i])
       // #6887 firefox doesn't update muted state if set via attribute
       // even immediately after element creation
       if (!el.component &&
           name === 'muted' &&
           platformMustUseProp(el.tag, el.attrsMap.type, name)) {
-        addProp(el, name, 'true')
+        addProp(el, name, 'true', list[i])
       }
     }
   }
@@ -620,7 +923,7 @@ function makeAttrsMap (attrs: Array<Object>): Object {
       process.env.NODE_ENV !== 'production' &&
       map[attrs[i].name] && !isIE && !isEdge
     ) {
-      warn('duplicate attribute: ' + attrs[i].name)
+      warn('duplicate attribute: ' + attrs[i].name, attrs[i])
     }
     map[attrs[i].name] = attrs[i].value
   }
@@ -667,7 +970,8 @@ function checkForAliasModel (el, value) {
         `You are binding v-model directly to a v-for iteration alias. ` +
         `This will not be able to modify the v-for source array because ` +
         `writing to the alias is like modifying a function local variable. ` +
-        `Consider using an array of objects and use v-model on an object property instead.`
+        `Consider using an array of objects and use v-model on an object property instead.`,
+        el.rawAttrsMap['v-model']
       )
     }
     _el = _el.parent
diff --git a/src/compiler/parser/text-parser.js b/src/compiler/parser/text-parser.js
index 284fca33bf4..cf82a62484f 100644
--- a/src/compiler/parser/text-parser.js
+++ b/src/compiler/parser/text-parser.js
@@ -3,7 +3,7 @@
 import { cached } from 'shared/util'
 import { parseFilters } from './filter-parser'
 
-const defaultTagRE = /\{\{((?:.|\n)+?)\}\}/g
+const defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g
 const regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g
 
 const buildRegex = cached(delimiters => {
diff --git a/src/compiler/to-function.js b/src/compiler/to-function.js
index 7fe0f13fff1..f607ec351d2 100644
--- a/src/compiler/to-function.js
+++ b/src/compiler/to-function.js
@@ -2,6 +2,7 @@
 
 import { noop, extend } from 'shared/util'
 import { warn as baseWarn, tip } from 'core/util/debug'
+import { generateCodeFrame } from './codeframe'
 
 type CompiledFunctionResult = {
   render: Function;
@@ -61,14 +62,28 @@ export function createCompileToFunctionFn (compile: Function): Function {
     // check compilation errors/tips
     if (process.env.NODE_ENV !== 'production') {
       if (compiled.errors && compiled.errors.length) {
-        warn(
-          `Error compiling template:\n\n${template}\n\n` +
-          compiled.errors.map(e => `- ${e}`).join('\n') + '\n',
-          vm
-        )
+        if (options.outputSourceRange) {
+          compiled.errors.forEach(e => {
+            warn(
+              `Error compiling template:\n\n${e.msg}\n\n` +
+              generateCodeFrame(template, e.start, e.end),
+              vm
+            )
+          })
+        } else {
+          warn(
+            `Error compiling template:\n\n${template}\n\n` +
+            compiled.errors.map(e => `- ${e}`).join('\n') + '\n',
+            vm
+          )
+        }
       }
       if (compiled.tips && compiled.tips.length) {
-        compiled.tips.forEach(msg => tip(msg, vm))
+        if (options.outputSourceRange) {
+          compiled.tips.forEach(e => tip(e.msg, vm))
+        } else {
+          compiled.tips.forEach(msg => tip(msg, vm))
+        }
       }
     }
 
diff --git a/src/core/components/keep-alive.js b/src/core/components/keep-alive.js
index 53dd264aaa1..83a42aab158 100644
--- a/src/core/components/keep-alive.js
+++ b/src/core/components/keep-alive.js
@@ -3,7 +3,13 @@
 import { isRegExp, remove } from 'shared/util'
 import { getFirstComponentChild } from 'core/vdom/helpers/index'
 
-type VNodeCache = { [key: string]: ?VNode };
+type CacheEntry = {
+  name: ?string;
+  tag: ?string;
+  componentInstance: Component;
+};
+
+type CacheEntryMap = { [key: string]: ?CacheEntry };
 
 function getComponentName (opts: ?VNodeComponentOptions): ?string {
   return opts && (opts.Ctor.options.name || opts.tag)
@@ -24,9 +30,9 @@ function matches (pattern: string | RegExp | Array<string>, name: string): boole
 function pruneCache (keepAliveInstance: any, filter: Function) {
   const { cache, keys, _vnode } = keepAliveInstance
   for (const key in cache) {
-    const cachedNode: ?VNode = cache[key]
-    if (cachedNode) {
-      const name: ?string = getComponentName(cachedNode.componentOptions)
+    const entry: ?CacheEntry = cache[key]
+    if (entry) {
+      const name: ?string = entry.name
       if (name && !filter(name)) {
         pruneCacheEntry(cache, key, keys, _vnode)
       }
@@ -35,14 +41,14 @@ function pruneCache (keepAliveInstance: any, filter: Function) {
 }
 
 function pruneCacheEntry (
-  cache: VNodeCache,
+  cache: CacheEntryMap,
   key: string,
   keys: Array<string>,
   current?: VNode
 ) {
-  const cached = cache[key]
-  if (cached && (!current || cached.tag !== current.tag)) {
-    cached.componentInstance.$destroy()
+  const entry: ?CacheEntry = cache[key]
+  if (entry && (!current || entry.tag !== current.tag)) {
+    entry.componentInstance.$destroy()
   }
   cache[key] = null
   remove(keys, key)
@@ -60,6 +66,26 @@ export default {
     max: [String, Number]
   },
 
+  methods: {
+    cacheVNode() {
+      const { cache, keys, vnodeToCache, keyToCache } = this
+      if (vnodeToCache) {
+        const { tag, componentInstance, componentOptions } = vnodeToCache
+        cache[keyToCache] = {
+          name: getComponentName(componentOptions),
+          tag,
+          componentInstance,
+        }
+        keys.push(keyToCache)
+        // prune oldest entry
+        if (this.max && keys.length > parseInt(this.max)) {
+          pruneCacheEntry(cache, keys[0], keys, this._vnode)
+        }
+        this.vnodeToCache = null
+      }
+    }
+  },
+
   created () {
     this.cache = Object.create(null)
     this.keys = []
@@ -71,13 +97,18 @@ export default {
     }
   },
 
-  watch: {
-    include (val: string | RegExp | Array<string>) {
+  mounted () {
+    this.cacheVNode()
+    this.$watch('include', val => {
       pruneCache(this, name => matches(val, name))
-    },
-    exclude (val: string | RegExp | Array<string>) {
+    })
+    this.$watch('exclude', val => {
       pruneCache(this, name => !matches(val, name))
-    }
+    })
+  },
+
+  updated () {
+    this.cacheVNode()
   },
 
   render () {
@@ -109,12 +140,9 @@ export default {
         remove(keys, key)
         keys.push(key)
       } else {
-        cache[key] = vnode
-        keys.push(key)
-        // prune oldest entry
-        if (this.max && keys.length > parseInt(this.max)) {
-          pruneCacheEntry(cache, keys[0], keys, this._vnode)
-        }
+        // delay setting the cache until update
+        this.vnodeToCache = vnode
+        this.keyToCache = key
       }
 
       vnode.data.keepAlive = true
diff --git a/src/core/config.js b/src/core/config.js
index f25f09d1f35..cae9d3dd395 100644
--- a/src/core/config.js
+++ b/src/core/config.js
@@ -28,6 +28,9 @@ export type Config = {
   getTagNamespace: (x?: string) => string | void;
   mustUseProp: (tag: string, type: ?string, name: string) => boolean;
 
+  // private
+  async: boolean;
+
   // legacy
   _lifecycleHooks: Array<string>;
 };
@@ -114,6 +117,12 @@ export default ({
    */
   mustUseProp: no,
 
+  /**
+   * Perform updates asynchronously. Intended to be used by Vue Test Utils
+   * This will significantly reduce performance if set to false.
+   */
+  async: true,
+
   /**
    * Exposed for legacy reasons
    */
diff --git a/src/core/global-api/index.js b/src/core/global-api/index.js
index 03ffa0fbf31..b3387a891ff 100644
--- a/src/core/global-api/index.js
+++ b/src/core/global-api/index.js
@@ -8,6 +8,7 @@ import { initAssetRegisters } from './assets'
 import { set, del } from '../observer/index'
 import { ASSET_TYPES } from 'shared/constants'
 import builtInComponents from '../components/index'
+import { observe } from 'core/observer/index'
 
 import {
   warn,
@@ -44,6 +45,12 @@ export function initGlobalAPI (Vue: GlobalAPI) {
   Vue.delete = del
   Vue.nextTick = nextTick
 
+  // 2.6 explicit observable API
+  Vue.observable = <T>(obj: T): T => {
+    observe(obj)
+    return obj
+  }
+
   Vue.options = Object.create(null)
   ASSET_TYPES.forEach(type => {
     Vue.options[type + 's'] = Object.create(null)
diff --git a/src/core/index.js b/src/core/index.js
index b2a0cb8c5a2..daf6203b263 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -1,6 +1,7 @@
 import Vue from './instance/index'
 import { initGlobalAPI } from './global-api/index'
 import { isServerRendering } from 'core/util/env'
+import { FunctionalRenderContext } from 'core/vdom/create-functional-component'
 
 initGlobalAPI(Vue)
 
@@ -15,6 +16,11 @@ Object.defineProperty(Vue.prototype, '$ssrContext', {
   }
 })
 
+// expose FunctionalRenderContext for ssr runtime helper installation
+Object.defineProperty(Vue, 'FunctionalRenderContext', {
+  value: FunctionalRenderContext
+})
+
 Vue.version = '__VERSION__'
 
 export default Vue
diff --git a/src/core/instance/events.js b/src/core/instance/events.js
index 587799969c2..4d5bb552850 100644
--- a/src/core/instance/events.js
+++ b/src/core/instance/events.js
@@ -4,8 +4,8 @@ import {
   tip,
   toArray,
   hyphenate,
-  handleError,
-  formatComponentName
+  formatComponentName,
+  invokeWithErrorHandling
 } from '../util/index'
 import { updateListeners } from '../vdom/helpers/index'
 
@@ -21,25 +21,31 @@ export function initEvents (vm: Component) {
 
 let target: any
 
-function add (event, fn, once) {
-  if (once) {
-    target.$once(event, fn)
-  } else {
-    target.$on(event, fn)
-  }
+function add (event, fn) {
+  target.$on(event, fn)
 }
 
 function remove (event, fn) {
   target.$off(event, fn)
 }
 
+function createOnceHandler (event, fn) {
+  const _target = target
+  return function onceHandler () {
+    const res = fn.apply(null, arguments)
+    if (res !== null) {
+      _target.$off(event, onceHandler)
+    }
+  }
+}
+
 export function updateComponentListeners (
   vm: Component,
   listeners: Object,
   oldListeners: ?Object
 ) {
   target = vm
-  updateListeners(listeners, oldListeners || {}, add, remove, vm)
+  updateListeners(listeners, oldListeners || {}, add, remove, createOnceHandler, vm)
   target = undefined
 }
 
@@ -49,7 +55,7 @@ export function eventsMixin (Vue: Class<Component>) {
     const vm: Component = this
     if (Array.isArray(event)) {
       for (let i = 0, l = event.length; i < l; i++) {
-        this.$on(event[i], fn)
+        vm.$on(event[i], fn)
       }
     } else {
       (vm._events[event] || (vm._events[event] = [])).push(fn)
@@ -83,7 +89,7 @@ export function eventsMixin (Vue: Class<Component>) {
     // array of events
     if (Array.isArray(event)) {
       for (let i = 0, l = event.length; i < l; i++) {
-        this.$off(event[i], fn)
+        vm.$off(event[i], fn)
       }
       return vm
     }
@@ -96,16 +102,14 @@ export function eventsMixin (Vue: Class<Component>) {
       vm._events[event] = null
       return vm
     }
-    if (fn) {
-      // specific handler
-      let cb
-      let i = cbs.length
-      while (i--) {
-        cb = cbs[i]
-        if (cb === fn || cb.fn === fn) {
-          cbs.splice(i, 1)
-          break
-        }
+    // specific handler
+    let cb
+    let i = cbs.length
+    while (i--) {
+      cb = cbs[i]
+      if (cb === fn || cb.fn === fn) {
+        cbs.splice(i, 1)
+        break
       }
     }
     return vm
@@ -129,12 +133,9 @@ export function eventsMixin (Vue: Class<Component>) {
     if (cbs) {
       cbs = cbs.length > 1 ? toArray(cbs) : cbs
       const args = toArray(arguments, 1)
+      const info = `event handler for "${event}"`
       for (let i = 0, l = cbs.length; i < l; i++) {
-        try {
-          cbs[i].apply(vm, args)
-        } catch (e) {
-          handleError(e, vm, `event handler for "${event}"`)
-        }
+        invokeWithErrorHandling(cbs[i], vm, args, vm, info)
       }
     }
     return vm
diff --git a/src/core/instance/init.js b/src/core/instance/init.js
index ed2550d09ae..7c5ab2da963 100644
--- a/src/core/instance/init.js
+++ b/src/core/instance/init.js
@@ -77,8 +77,6 @@ export function initInternalComponent (vm: Component, options: InternalComponent
   const parentVnode = options._parentVnode
   opts.parent = options.parent
   opts._parentVnode = parentVnode
-  opts._parentElm = options._parentElm
-  opts._refElm = options._refElm
 
   const vnodeComponentOptions = parentVnode.componentOptions
   opts.propsData = vnodeComponentOptions.propsData
@@ -119,32 +117,12 @@ export function resolveConstructorOptions (Ctor: Class<Component>) {
 function resolveModifiedOptions (Ctor: Class<Component>): ?Object {
   let modified
   const latest = Ctor.options
-  const extended = Ctor.extendOptions
   const sealed = Ctor.sealedOptions
   for (const key in latest) {
     if (latest[key] !== sealed[key]) {
       if (!modified) modified = {}
-      modified[key] = dedupe(latest[key], extended[key], sealed[key])
+      modified[key] = latest[key]
     }
   }
   return modified
 }
-
-function dedupe (latest, extended, sealed) {
-  // compare latest and sealed to ensure lifecycle hooks won't be duplicated
-  // between merges
-  if (Array.isArray(latest)) {
-    const res = []
-    sealed = Array.isArray(sealed) ? sealed : [sealed]
-    extended = Array.isArray(extended) ? extended : [extended]
-    for (let i = 0; i < latest.length; i++) {
-      // push original options and not sealed options to exclude duplicated options
-      if (extended.indexOf(latest[i]) >= 0 || sealed.indexOf(latest[i]) < 0) {
-        res.push(latest[i])
-      }
-    }
-    return res
-  } else {
-    return latest
-  }
-}
diff --git a/src/core/instance/inject.js b/src/core/instance/inject.js
index 019026479ec..b04184e516a 100644
--- a/src/core/instance/inject.js
+++ b/src/core/instance/inject.js
@@ -1,8 +1,8 @@
 /* @flow */
 
-import { warn } from '../util/index'
-import { hasSymbol } from 'core/util/env'
-import { defineReactive, observerState } from '../observer/index'
+import { hasOwn } from 'shared/util'
+import { warn, hasSymbol } from '../util/index'
+import { defineReactive, toggleObserving } from '../observer/index'
 
 export function initProvide (vm: Component) {
   const provide = vm.$options.provide
@@ -16,7 +16,7 @@ export function initProvide (vm: Component) {
 export function initInjections (vm: Component) {
   const result = resolveInject(vm.$options.inject, vm)
   if (result) {
-    observerState.shouldConvert = false
+    toggleObserving(false)
     Object.keys(result).forEach(key => {
       /* istanbul ignore else */
       if (process.env.NODE_ENV !== 'production') {
@@ -32,7 +32,7 @@ export function initInjections (vm: Component) {
         defineReactive(vm, key, result[key])
       }
     })
-    observerState.shouldConvert = true
+    toggleObserving(true)
   }
 }
 
@@ -41,18 +41,17 @@ export function resolveInject (inject: any, vm: Component): ?Object {
     // inject is :any because flow is not smart enough to figure out cached
     const result = Object.create(null)
     const keys = hasSymbol
-      ? Reflect.ownKeys(inject).filter(key => {
-        /* istanbul ignore next */
-        return Object.getOwnPropertyDescriptor(inject, key).enumerable
-      })
+      ? Reflect.ownKeys(inject)
       : Object.keys(inject)
 
     for (let i = 0; i < keys.length; i++) {
       const key = keys[i]
+      // #6574 in case the inject object is observed...
+      if (key === '__ob__') continue
       const provideKey = inject[key].from
       let source = vm
       while (source) {
-        if (source._provided && provideKey in source._provided) {
+        if (source._provided && hasOwn(source._provided, provideKey)) {
           result[key] = source._provided[provideKey]
           break
         }
diff --git a/src/core/instance/lifecycle.js b/src/core/instance/lifecycle.js
index 27756af66fc..c35129a45f8 100644
--- a/src/core/instance/lifecycle.js
+++ b/src/core/instance/lifecycle.js
@@ -4,22 +4,31 @@ import config from '../config'
 import Watcher from '../observer/watcher'
 import { mark, measure } from '../util/perf'
 import { createEmptyVNode } from '../vdom/vnode'
-import { observerState } from '../observer/index'
 import { updateComponentListeners } from './events'
 import { resolveSlots } from './render-helpers/resolve-slots'
+import { toggleObserving } from '../observer/index'
+import { pushTarget, popTarget } from '../observer/dep'
 
 import {
   warn,
   noop,
   remove,
-  handleError,
   emptyObject,
-  validateProp
+  validateProp,
+  invokeWithErrorHandling
 } from '../util/index'
 
 export let activeInstance: any = null
 export let isUpdatingChildComponent: boolean = false
 
+export function setActiveInstance(vm: Component) {
+  const prevActiveInstance = activeInstance
+  activeInstance = vm
+  return () => {
+    activeInstance = prevActiveInstance
+  }
+}
+
 export function initLifecycle (vm: Component) {
   const options = vm.$options
 
@@ -49,31 +58,20 @@ export function initLifecycle (vm: Component) {
 export function lifecycleMixin (Vue: Class<Component>) {
   Vue.prototype._update = function (vnode: VNode, hydrating?: boolean) {
     const vm: Component = this
-    if (vm._isMounted) {
-      callHook(vm, 'beforeUpdate')
-    }
     const prevEl = vm.$el
     const prevVnode = vm._vnode
-    const prevActiveInstance = activeInstance
-    activeInstance = vm
+    const restoreActiveInstance = setActiveInstance(vm)
     vm._vnode = vnode
     // Vue.prototype.__patch__ is injected in entry points
     // based on the rendering backend used.
     if (!prevVnode) {
       // initial render
-      vm.$el = vm.__patch__(
-        vm.$el, vnode, hydrating, false /* removeOnly */,
-        vm.$options._parentElm,
-        vm.$options._refElm
-      )
-      // no need for the ref nodes after initial patch
-      // this prevents keeping a detached DOM tree in memory (#5851)
-      vm.$options._parentElm = vm.$options._refElm = null
+      vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false /* removeOnly */)
     } else {
       // updates
       vm.$el = vm.__patch__(prevVnode, vnode)
     }
-    activeInstance = prevActiveInstance
+    restoreActiveInstance()
     // update __vue__ reference
     if (prevEl) {
       prevEl.__vue__ = null
@@ -196,7 +194,13 @@ export function mountComponent (
   // we set this to vm._watcher inside the watcher's constructor
   // since the watcher's initial patch may call $forceUpdate (e.g. inside child
   // component's mounted hook), which relies on vm._watcher being already defined
-  new Watcher(vm, updateComponent, noop, null, true /* isRenderWatcher */)
+  new Watcher(vm, updateComponent, noop, {
+    before () {
+      if (vm._isMounted && !vm._isDestroyed) {
+        callHook(vm, 'beforeUpdate')
+      }
+    }
+  }, true /* isRenderWatcher */)
   hydrating = false
 
   // manually mounted instance, call mounted on self
@@ -220,12 +224,27 @@ export function updateChildComponent (
   }
 
   // determine whether component has slot children
-  // we need to do this before overwriting $options._renderChildren
-  const hasChildren = !!(
+  // we need to do this before overwriting $options._renderChildren.
+
+  // check if there are dynamic scopedSlots (hand-written or compiled but with
+  // dynamic slot names). Static scoped slots compiled from template has the
+  // "$stable" marker.
+  const newScopedSlots = parentVnode.data.scopedSlots
+  const oldScopedSlots = vm.$scopedSlots
+  const hasDynamicScopedSlot = !!(
+    (newScopedSlots && !newScopedSlots.$stable) ||
+    (oldScopedSlots !== emptyObject && !oldScopedSlots.$stable) ||
+    (newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key) ||
+    (!newScopedSlots && vm.$scopedSlots.$key)
+  )
+
+  // Any static slot children from the parent may have changed during parent's
+  // update. Dynamic scoped slots may also have changed. In such cases, a forced
+  // update is necessary to ensure correctness.
+  const needsForceUpdate = !!(
     renderChildren ||               // has new static slots
     vm.$options._renderChildren ||  // has old static slots
-    parentVnode.data.scopedSlots || // has new scoped slots
-    vm.$scopedSlots !== emptyObject // has old scoped slots
+    hasDynamicScopedSlot
   )
 
   vm.$options._parentVnode = parentVnode
@@ -244,14 +263,15 @@ export function updateChildComponent (
 
   // update props
   if (propsData && vm.$options.props) {
-    observerState.shouldConvert = false
+    toggleObserving(false)
     const props = vm._props
     const propKeys = vm.$options._propKeys || []
     for (let i = 0; i < propKeys.length; i++) {
       const key = propKeys[i]
-      props[key] = validateProp(key, vm.$options.props, propsData, vm)
+      const propOptions: any = vm.$options.props // wtf flow?
+      props[key] = validateProp(key, propOptions, propsData, vm)
     }
-    observerState.shouldConvert = true
+    toggleObserving(true)
     // keep a copy of raw propsData
     vm.$options.propsData = propsData
   }
@@ -263,7 +283,7 @@ export function updateChildComponent (
   updateComponentListeners(vm, listeners, oldListeners)
 
   // resolve slots + force update if has children
-  if (hasChildren) {
+  if (needsForceUpdate) {
     vm.$slots = resolveSlots(renderChildren, parentVnode.context)
     vm.$forceUpdate()
   }
@@ -315,17 +335,17 @@ export function deactivateChildComponent (vm: Component, direct?: boolean) {
 }
 
 export function callHook (vm: Component, hook: string) {
+  // #7573 disable dep collection when invoking lifecycle hooks
+  pushTarget()
   const handlers = vm.$options[hook]
+  const info = `${hook} hook`
   if (handlers) {
     for (let i = 0, j = handlers.length; i < j; i++) {
-      try {
-        handlers[i].call(vm)
-      } catch (e) {
-        handleError(e, vm, `${hook} hook`)
-      }
+      invokeWithErrorHandling(handlers[i], vm, null, vm, info)
     }
   }
   if (vm._hasHookEvent) {
     vm.$emit('hook:' + hook)
   }
+  popTarget()
 }
diff --git a/src/core/instance/proxy.js b/src/core/instance/proxy.js
index 7454712f994..74c19cf601a 100644
--- a/src/core/instance/proxy.js
+++ b/src/core/instance/proxy.js
@@ -1,7 +1,7 @@
 /* not type checking this file because flow doesn't play well with Proxy */
 
 import config from 'core/config'
-import { warn, makeMap } from '../util/index'
+import { warn, makeMap, isNative } from '../util/index'
 
 let initProxy
 
@@ -9,7 +9,7 @@ if (process.env.NODE_ENV !== 'production') {
   const allowedGlobals = makeMap(
     'Infinity,undefined,NaN,isFinite,isNaN,' +
     'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' +
-    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' +
+    'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt,' +
     'require' // for Webpack/Browserify
   )
 
@@ -19,14 +19,23 @@ if (process.env.NODE_ENV !== 'production') {
       'referenced during render. Make sure that this property is reactive, ' +
       'either in the data option, or for class-based components, by ' +
       'initializing the property. ' +
-      'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.',
+      'See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties',
+      target
+    )
+  }
+
+  const warnReservedPrefix = (target, key) => {
+    warn(
+      `Property "${key}" must be accessed with "$data.${key}" because ` +
+      'properties starting with "$" or "_" are not proxied in the Vue instance to ' +
+      'prevent conflicts with Vue internals. ' +
+      'See: https://v2.vuejs.org/v2/api/#data',
       target
     )
   }
 
   const hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/)
+    typeof Proxy !== 'undefined' && isNative(Proxy)
 
   if (hasProxy) {
     const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact')
@@ -46,9 +55,11 @@ if (process.env.NODE_ENV !== 'production') {
   const hasHandler = {
     has (target, key) {
       const has = key in target
-      const isAllowed = allowedGlobals(key) || key.charAt(0) === '_'
+      const isAllowed = allowedGlobals(key) ||
+        (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data))
       if (!has && !isAllowed) {
-        warnNonPresent(target, key)
+        if (key in target.$data) warnReservedPrefix(target, key)
+        else warnNonPresent(target, key)
       }
       return has || !isAllowed
     }
@@ -57,7 +68,8 @@ if (process.env.NODE_ENV !== 'production') {
   const getHandler = {
     get (target, key) {
       if (typeof key === 'string' && !(key in target)) {
-        warnNonPresent(target, key)
+        if (key in target.$data) warnReservedPrefix(target, key)
+        else warnNonPresent(target, key)
       }
       return target[key]
     }
diff --git a/src/core/instance/render-helpers/bind-dynamic-keys.js b/src/core/instance/render-helpers/bind-dynamic-keys.js
new file mode 100644
index 00000000000..bf920744b81
--- /dev/null
+++ b/src/core/instance/render-helpers/bind-dynamic-keys.js
@@ -0,0 +1,35 @@
+/* @flow */
+
+// helper to process dynamic keys for dynamic arguments in v-bind and v-on.
+// For example, the following template:
+//
+// <div id="app" :[key]="value">
+//
+// compiles to the following:
+//
+// _c('div', { attrs: bindDynamicKeys({ "id": "app" }, [key, value]) })
+
+import { warn } from 'core/util/debug'
+
+export function bindDynamicKeys (baseObj: Object, values: Array<any>): Object {
+  for (let i = 0; i < values.length; i += 2) {
+    const key = values[i]
+    if (typeof key === 'string' && key) {
+      baseObj[values[i]] = values[i + 1]
+    } else if (process.env.NODE_ENV !== 'production' && key !== '' && key !== null) {
+      // null is a special value for explicitly removing a binding
+      warn(
+        `Invalid value for dynamic directive argument (expected string or null): ${key}`,
+        this
+      )
+    }
+  }
+  return baseObj
+}
+
+// helper to dynamically append modifier runtime markers to event names.
+// ensure only append when value is already string, otherwise it will be cast
+// to string and cause the type check to miss.
+export function prependModifier (value: any, symbol: string): any {
+  return typeof value === 'string' ? symbol + value : value
+}
diff --git a/src/core/instance/render-helpers/bind-object-props.js b/src/core/instance/render-helpers/bind-object-props.js
index c71dce5c4c2..f1b34ae2f1e 100644
--- a/src/core/instance/render-helpers/bind-object-props.js
+++ b/src/core/instance/render-helpers/bind-object-props.js
@@ -6,7 +6,9 @@ import {
   warn,
   isObject,
   toObject,
-  isReservedAttribute
+  isReservedAttribute,
+  camelize,
+  hyphenate
 } from 'core/util/index'
 
 /**
@@ -43,7 +45,9 @@ export function bindObjectProps (
             ? data.domProps || (data.domProps = {})
             : data.attrs || (data.attrs = {})
         }
-        if (!(key in hash)) {
+        const camelizedKey = camelize(key)
+        const hyphenatedKey = hyphenate(key)
+        if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
           hash[key] = value[key]
 
           if (isSync) {
diff --git a/src/core/instance/render-helpers/check-keycodes.js b/src/core/instance/render-helpers/check-keycodes.js
index 8e77f29b9e4..02613d4d364 100644
--- a/src/core/instance/render-helpers/check-keycodes.js
+++ b/src/core/instance/render-helpers/check-keycodes.js
@@ -3,6 +3,14 @@
 import config from 'core/config'
 import { hyphenate } from 'shared/util'
 
+function isKeyNotMatch<T> (expect: T | Array<T>, actual: T): boolean {
+  if (Array.isArray(expect)) {
+    return expect.indexOf(actual) === -1
+  } else {
+    return expect !== actual
+  }
+}
+
 /**
  * Runtime helper for checking keyCodes from config.
  * exposed as Vue.prototype._k
@@ -11,17 +19,17 @@ import { hyphenate } from 'shared/util'
 export function checkKeyCodes (
   eventKeyCode: number,
   key: string,
-  builtInAlias?: number | Array<number>,
-  eventKeyName?: string
+  builtInKeyCode?: number | Array<number>,
+  eventKeyName?: string,
+  builtInKeyName?: string | Array<string>
 ): ?boolean {
-  const keyCodes = config.keyCodes[key] || builtInAlias
-  if (keyCodes) {
-    if (Array.isArray(keyCodes)) {
-      return keyCodes.indexOf(eventKeyCode) === -1
-    } else {
-      return keyCodes !== eventKeyCode
-    }
+  const mappedKeyCode = config.keyCodes[key] || builtInKeyCode
+  if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
+    return isKeyNotMatch(builtInKeyName, eventKeyName)
+  } else if (mappedKeyCode) {
+    return isKeyNotMatch(mappedKeyCode, eventKeyCode)
   } else if (eventKeyName) {
     return hyphenate(eventKeyName) !== key
   }
+  return eventKeyCode === undefined
 }
diff --git a/src/core/instance/render-helpers/index.js b/src/core/instance/render-helpers/index.js
index 38414a9ab53..04e7f9cfe1e 100644
--- a/src/core/instance/render-helpers/index.js
+++ b/src/core/instance/render-helpers/index.js
@@ -9,7 +9,8 @@ import { checkKeyCodes } from './check-keycodes'
 import { bindObjectProps } from './bind-object-props'
 import { renderStatic, markOnce } from './render-static'
 import { bindObjectListeners } from './bind-object-listeners'
-import { resolveScopedSlots } from './resolve-slots'
+import { resolveScopedSlots } from './resolve-scoped-slots'
+import { bindDynamicKeys, prependModifier } from './bind-dynamic-keys'
 
 export function installRenderHelpers (target: any) {
   target._o = markOnce
@@ -27,4 +28,6 @@ export function installRenderHelpers (target: any) {
   target._e = createEmptyVNode
   target._u = resolveScopedSlots
   target._g = bindObjectListeners
+  target._d = bindDynamicKeys
+  target._p = prependModifier
 }
diff --git a/src/core/instance/render-helpers/render-list.js b/src/core/instance/render-helpers/render-list.js
index abe99db4d6d..cf68742403a 100644
--- a/src/core/instance/render-helpers/render-list.js
+++ b/src/core/instance/render-helpers/render-list.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { isObject, isDef } from 'core/util/index'
+import { isObject, isDef, hasSymbol } from 'core/util/index'
 
 /**
  * Runtime helper for rendering v-for lists.
@@ -25,15 +25,26 @@ export function renderList (
       ret[i] = render(i + 1, i)
     }
   } else if (isObject(val)) {
-    keys = Object.keys(val)
-    ret = new Array(keys.length)
-    for (i = 0, l = keys.length; i < l; i++) {
-      key = keys[i]
-      ret[i] = render(val[key], key, i)
+    if (hasSymbol && val[Symbol.iterator]) {
+      ret = []
+      const iterator: Iterator<any> = val[Symbol.iterator]()
+      let result = iterator.next()
+      while (!result.done) {
+        ret.push(render(result.value, ret.length))
+        result = iterator.next()
+      }
+    } else {
+      keys = Object.keys(val)
+      ret = new Array(keys.length)
+      for (i = 0, l = keys.length; i < l; i++) {
+        key = keys[i]
+        ret[i] = render(val[key], key, i)
+      }
     }
   }
-  if (isDef(ret)) {
-    (ret: any)._isVList = true
+  if (!isDef(ret)) {
+    ret = []
   }
+  (ret: any)._isVList = true
   return ret
 }
diff --git a/src/core/instance/render-helpers/render-slot.js b/src/core/instance/render-helpers/render-slot.js
index a58daa74e62..c0a86608342 100644
--- a/src/core/instance/render-helpers/render-slot.js
+++ b/src/core/instance/render-helpers/render-slot.js
@@ -7,38 +7,28 @@ import { extend, warn, isObject } from 'core/util/index'
  */
 export function renderSlot (
   name: string,
-  fallback: ?Array<VNode>,
+  fallbackRender: ?((() => Array<VNode>) | Array<VNode>),
   props: ?Object,
   bindObject: ?Object
 ): ?Array<VNode> {
   const scopedSlotFn = this.$scopedSlots[name]
   let nodes
-  if (scopedSlotFn) { // scoped slot
+  if (scopedSlotFn) {
+    // scoped slot
     props = props || {}
     if (bindObject) {
       if (process.env.NODE_ENV !== 'production' && !isObject(bindObject)) {
-        warn(
-          'slot v-bind without argument expects an Object',
-          this
-        )
+        warn('slot v-bind without argument expects an Object', this)
       }
       props = extend(extend({}, bindObject), props)
     }
-    nodes = scopedSlotFn(props) || fallback
+    nodes =
+      scopedSlotFn(props) ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender)
   } else {
-    const slotNodes = this.$slots[name]
-    // warn duplicate slot usage
-    if (slotNodes) {
-      if (process.env.NODE_ENV !== 'production' && slotNodes._rendered) {
-        warn(
-          `Duplicate presence of slot "${name}" found in the same render tree ` +
-          `- this will likely cause render errors.`,
-          this
-        )
-      }
-      slotNodes._rendered = true
-    }
-    nodes = slotNodes || fallback
+    nodes =
+      this.$slots[name] ||
+      (typeof fallbackRender === 'function' ? fallbackRender() : fallbackRender)
   }
 
   const target = props && props.slot
diff --git a/src/core/instance/render-helpers/resolve-scoped-slots.js b/src/core/instance/render-helpers/resolve-scoped-slots.js
new file mode 100644
index 00000000000..f11ca0008cd
--- /dev/null
+++ b/src/core/instance/render-helpers/resolve-scoped-slots.js
@@ -0,0 +1,27 @@
+/* @flow */
+
+export function resolveScopedSlots (
+  fns: ScopedSlotsData, // see flow/vnode
+  res?: Object,
+  // the following are added in 2.6
+  hasDynamicKeys?: boolean,
+  contentHashKey?: number
+): { [key: string]: Function, $stable: boolean } {
+  res = res || { $stable: !hasDynamicKeys }
+  for (let i = 0; i < fns.length; i++) {
+    const slot = fns[i]
+    if (Array.isArray(slot)) {
+      resolveScopedSlots(slot, res, hasDynamicKeys)
+    } else if (slot) {
+      // marker for reverse proxying v-slot without scope on this.$slots
+      if (slot.proxy) {
+        slot.fn.proxy = true
+      }
+      res[slot.key] = slot.fn
+    }
+  }
+  if (contentHashKey) {
+    (res: any).$key = contentHashKey
+  }
+  return res
+}
diff --git a/src/core/instance/render-helpers/resolve-slots.js b/src/core/instance/render-helpers/resolve-slots.js
index 02f007cf233..b4f2ef0224f 100644
--- a/src/core/instance/render-helpers/resolve-slots.js
+++ b/src/core/instance/render-helpers/resolve-slots.js
@@ -9,10 +9,10 @@ export function resolveSlots (
   children: ?Array<VNode>,
   context: ?Component
 ): { [key: string]: Array<VNode> } {
-  const slots = {}
-  if (!children) {
-    return slots
+  if (!children || !children.length) {
+    return {}
   }
+  const slots = {}
   for (let i = 0, l = children.length; i < l; i++) {
     const child = children[i]
     const data = child.data
@@ -48,18 +48,3 @@ export function resolveSlots (
 function isWhitespace (node: VNode): boolean {
   return (node.isComment && !node.asyncFactory) || node.text === ' '
 }
-
-export function resolveScopedSlots (
-  fns: ScopedSlotsData, // see flow/vnode
-  res?: Object
-): { [key: string]: Function } {
-  res = res || {}
-  for (let i = 0; i < fns.length; i++) {
-    if (Array.isArray(fns[i])) {
-      resolveScopedSlots(fns[i], res)
-    } else {
-      res[fns[i].key] = fns[i].fn
-    }
-  }
-  return res
-}
diff --git a/src/core/instance/render.js b/src/core/instance/render.js
index 70fb2c0e57a..15b3ad69f3a 100644
--- a/src/core/instance/render.js
+++ b/src/core/instance/render.js
@@ -11,6 +11,7 @@ import {
 import { createElement } from '../vdom/create-element'
 import { installRenderHelpers } from './render-helpers/index'
 import { resolveSlots } from './render-helpers/resolve-slots'
+import { normalizeScopedSlots } from '../vdom/helpers/normalize-scoped-slots'
 import VNode, { createEmptyVNode } from '../vdom/vnode'
 
 import { isUpdatingChildComponent } from './lifecycle'
@@ -50,6 +51,13 @@ export function initRender (vm: Component) {
   }
 }
 
+export let currentRenderingInstance: Component | null = null
+
+// for testing only
+export function setCurrentRenderingInstance (vm: Component) {
+  currentRenderingInstance = vm
+}
+
 export function renderMixin (Vue: Class<Component>) {
   // install runtime convenience helpers
   installRenderHelpers(Vue.prototype)
@@ -62,16 +70,12 @@ export function renderMixin (Vue: Class<Component>) {
     const vm: Component = this
     const { render, _parentVnode } = vm.$options
 
-    // reset _rendered flag on slots for duplicate slot check
-    if (process.env.NODE_ENV !== 'production') {
-      for (const key in vm.$slots) {
-        // $flow-disable-line
-        vm.$slots[key]._rendered = false
-      }
-    }
-
     if (_parentVnode) {
-      vm.$scopedSlots = _parentVnode.data.scopedSlots || emptyObject
+      vm.$scopedSlots = normalizeScopedSlots(
+        _parentVnode.data.scopedSlots,
+        vm.$slots,
+        vm.$scopedSlots
+      )
     }
 
     // set parent vnode. this allows render functions to have access
@@ -80,26 +84,32 @@ export function renderMixin (Vue: Class<Component>) {
     // render self
     let vnode
     try {
+      // There's no need to maintain a stack because all render fns are called
+      // separately from one another. Nested component's render fns are called
+      // when parent component is patched.
+      currentRenderingInstance = vm
       vnode = render.call(vm._renderProxy, vm.$createElement)
     } catch (e) {
       handleError(e, vm, `render`)
       // return error render result,
       // or previous vnode to prevent render error causing blank component
       /* istanbul ignore else */
-      if (process.env.NODE_ENV !== 'production') {
-        if (vm.$options.renderError) {
-          try {
-            vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e)
-          } catch (e) {
-            handleError(e, vm, `renderError`)
-            vnode = vm._vnode
-          }
-        } else {
+      if (process.env.NODE_ENV !== 'production' && vm.$options.renderError) {
+        try {
+          vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e)
+        } catch (e) {
+          handleError(e, vm, `renderError`)
           vnode = vm._vnode
         }
       } else {
         vnode = vm._vnode
       }
+    } finally {
+      currentRenderingInstance = null
+    }
+    // if the returned array contains only a single node, allow it
+    if (Array.isArray(vnode) && vnode.length === 1) {
+      vnode = vnode[0]
     }
     // return empty vnode in case the render function errored out
     if (!(vnode instanceof VNode)) {
diff --git a/src/core/instance/state.js b/src/core/instance/state.js
index a42638a13f7..edcb13167e7 100644
--- a/src/core/instance/state.js
+++ b/src/core/instance/state.js
@@ -1,16 +1,16 @@
 /* @flow */
 
 import config from '../config'
-import Dep from '../observer/dep'
 import Watcher from '../observer/watcher'
+import Dep, { pushTarget, popTarget } from '../observer/dep'
 import { isUpdatingChildComponent } from './lifecycle'
 
 import {
   set,
   del,
   observe,
-  observerState,
-  defineReactive
+  defineReactive,
+  toggleObserving
 } from '../observer/index'
 
 import {
@@ -25,7 +25,8 @@ import {
   validateProp,
   isPlainObject,
   isServerRendering,
-  isReservedAttribute
+  isReservedAttribute,
+  invokeWithErrorHandling
 } from '../util/index'
 
 const sharedPropertyDefinition = {
@@ -69,7 +70,9 @@ function initProps (vm: Component, propsOptions: Object) {
   const keys = vm.$options._propKeys = []
   const isRoot = !vm.$parent
   // root instance props should be converted
-  observerState.shouldConvert = isRoot
+  if (!isRoot) {
+    toggleObserving(false)
+  }
   for (const key in propsOptions) {
     keys.push(key)
     const value = validateProp(key, propsOptions, propsData, vm)
@@ -84,7 +87,7 @@ function initProps (vm: Component, propsOptions: Object) {
         )
       }
       defineReactive(props, key, value, () => {
-        if (vm.$parent && !isUpdatingChildComponent) {
+        if (!isRoot && !isUpdatingChildComponent) {
           warn(
             `Avoid mutating a prop directly since the value will be ` +
             `overwritten whenever the parent component re-renders. ` +
@@ -104,7 +107,7 @@ function initProps (vm: Component, propsOptions: Object) {
       proxy(vm, `_props`, key)
     }
   }
-  observerState.shouldConvert = true
+  toggleObserving(true)
 }
 
 function initData (vm: Component) {
@@ -116,7 +119,7 @@ function initData (vm: Component) {
     data = {}
     process.env.NODE_ENV !== 'production' && warn(
       'data functions should return an object:\n' +
-      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
+      'https://v2.vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     )
   }
@@ -150,11 +153,15 @@ function initData (vm: Component) {
 }
 
 export function getData (data: Function, vm: Component): any {
+  // #7573 disable dep collection when invoking data getters
+  pushTarget()
   try {
     return data.call(vm, vm)
   } catch (e) {
     handleError(e, vm, `data()`)
     return {}
+  } finally {
+    popTarget()
   }
 }
 
@@ -196,6 +203,8 @@ function initComputed (vm: Component, computed: Object) {
         warn(`The computed property "${key}" is already defined in data.`, vm)
       } else if (vm.$options.props && key in vm.$options.props) {
         warn(`The computed property "${key}" is already defined as a prop.`, vm)
+      } else if (vm.$options.methods && key in vm.$options.methods) {
+        warn(`The computed property "${key}" is already defined as a method.`, vm)
       }
     }
   }
@@ -210,17 +219,15 @@ export function defineComputed (
   if (typeof userDef === 'function') {
     sharedPropertyDefinition.get = shouldCache
       ? createComputedGetter(key)
-      : userDef
+      : createGetterInvoker(userDef)
     sharedPropertyDefinition.set = noop
   } else {
     sharedPropertyDefinition.get = userDef.get
       ? shouldCache && userDef.cache !== false
         ? createComputedGetter(key)
-        : userDef.get
-      : noop
-    sharedPropertyDefinition.set = userDef.set
-      ? userDef.set
+        : createGetterInvoker(userDef.get)
       : noop
+    sharedPropertyDefinition.set = userDef.set || noop
   }
   if (process.env.NODE_ENV !== 'production' &&
       sharedPropertyDefinition.set === noop) {
@@ -249,13 +256,19 @@ function createComputedGetter (key) {
   }
 }
 
+function createGetterInvoker(fn) {
+  return function computedGetter () {
+    return fn.call(this, this)
+  }
+}
+
 function initMethods (vm: Component, methods: Object) {
   const props = vm.$options.props
   for (const key in methods) {
     if (process.env.NODE_ENV !== 'production') {
-      if (methods[key] == null) {
+      if (typeof methods[key] !== 'function') {
         warn(
-          `Method "${key}" has an undefined value in the component definition. ` +
+          `Method "${key}" has type "${typeof methods[key]}" in the component definition. ` +
           `Did you reference the function correctly?`,
           vm
         )
@@ -273,7 +286,7 @@ function initMethods (vm: Component, methods: Object) {
         )
       }
     }
-    vm[key] = methods[key] == null ? noop : bind(methods[key], vm)
+    vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm)
   }
 }
 
@@ -292,7 +305,7 @@ function initWatch (vm: Component, watch: Object) {
 
 function createWatcher (
   vm: Component,
-  keyOrFn: string | Function,
+  expOrFn: string | Function,
   handler: any,
   options?: Object
 ) {
@@ -303,7 +316,7 @@ function createWatcher (
   if (typeof handler === 'string') {
     handler = vm[handler]
   }
-  return vm.$watch(keyOrFn, handler, options)
+  return vm.$watch(expOrFn, handler, options)
 }
 
 export function stateMixin (Vue: Class<Component>) {
@@ -315,7 +328,7 @@ export function stateMixin (Vue: Class<Component>) {
   const propsDef = {}
   propsDef.get = function () { return this._props }
   if (process.env.NODE_ENV !== 'production') {
-    dataDef.set = function (newData: Object) {
+    dataDef.set = function () {
       warn(
         'Avoid replacing instance root $data. ' +
         'Use nested data properties instead.',
@@ -345,7 +358,10 @@ export function stateMixin (Vue: Class<Component>) {
     options.user = true
     const watcher = new Watcher(vm, expOrFn, cb, options)
     if (options.immediate) {
-      cb.call(vm, watcher.value)
+      const info = `callback for immediate watcher "${watcher.expression}"`
+      pushTarget()
+      invokeWithErrorHandling(cb, vm, [watcher.value], vm, info)
+      popTarget()
     }
     return function unwatchFn () {
       watcher.teardown()
diff --git a/src/core/observer/dep.js b/src/core/observer/dep.js
index 5d55e9cd421..974b9541c28 100644
--- a/src/core/observer/dep.js
+++ b/src/core/observer/dep.js
@@ -2,6 +2,7 @@
 
 import type Watcher from './watcher'
 import { remove } from '../util/index'
+import config from '../config'
 
 let uid = 0
 
@@ -36,23 +37,30 @@ export default class Dep {
   notify () {
     // stabilize the subscriber list first
     const subs = this.subs.slice()
+    if (process.env.NODE_ENV !== 'production' && !config.async) {
+      // subs aren't sorted in scheduler if not running async
+      // we need to sort them now to make sure they fire in correct
+      // order
+      subs.sort((a, b) => a.id - b.id)
+    }
     for (let i = 0, l = subs.length; i < l; i++) {
       subs[i].update()
     }
   }
 }
 
-// the current target watcher being evaluated.
-// this is globally unique because there could be only one
-// watcher being evaluated at any time.
+// The current target watcher being evaluated.
+// This is globally unique because only one watcher
+// can be evaluated at a time.
 Dep.target = null
 const targetStack = []
 
-export function pushTarget (_target: Watcher) {
-  if (Dep.target) targetStack.push(Dep.target)
-  Dep.target = _target
+export function pushTarget (target: ?Watcher) {
+  targetStack.push(target)
+  Dep.target = target
 }
 
 export function popTarget () {
-  Dep.target = targetStack.pop()
+  targetStack.pop()
+  Dep.target = targetStack[targetStack.length - 1]
 }
diff --git a/src/core/observer/index.js b/src/core/observer/index.js
index 86a21f9e4f2..545adb64025 100644
--- a/src/core/observer/index.js
+++ b/src/core/observer/index.js
@@ -10,6 +10,8 @@ import {
   hasProto,
   isObject,
   isPlainObject,
+  isPrimitive,
+  isUndef,
   isValidArrayIndex,
   isServerRendering
 } from '../util/index'
@@ -17,25 +19,25 @@ import {
 const arrayKeys = Object.getOwnPropertyNames(arrayMethods)
 
 /**
- * By default, when a reactive property is set, the new value is
- * also converted to become reactive. However when passing down props,
- * we don't want to force conversion because the value may be a nested value
- * under a frozen data structure. Converting it would defeat the optimization.
+ * In some cases we may want to disable observation inside a component's
+ * update computation.
  */
-export const observerState = {
-  shouldConvert: true
+export let shouldObserve: boolean = true
+
+export function toggleObserving (value: boolean) {
+  shouldObserve = value
 }
 
 /**
- * Observer class that are attached to each observed
- * object. Once attached, the observer converts target
+ * Observer class that is attached to each observed
+ * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
- * collect dependencies and dispatches updates.
+ * collect dependencies and dispatch updates.
  */
 export class Observer {
   value: any;
   dep: Dep;
-  vmCount: number; // number of vms that has this object as root $data
+  vmCount: number; // number of vms that have this object as root $data
 
   constructor (value: any) {
     this.value = value
@@ -43,10 +45,11 @@ export class Observer {
     this.vmCount = 0
     def(value, '__ob__', this)
     if (Array.isArray(value)) {
-      const augment = hasProto
-        ? protoAugment
-        : copyAugment
-      augment(value, arrayMethods, arrayKeys)
+      if (hasProto) {
+        protoAugment(value, arrayMethods)
+      } else {
+        copyAugment(value, arrayMethods, arrayKeys)
+      }
       this.observeArray(value)
     } else {
       this.walk(value)
@@ -54,14 +57,14 @@ export class Observer {
   }
 
   /**
-   * Walk through each property and convert them into
+   * Walk through all properties and convert them into
    * getter/setters. This method should only be called when
    * value type is Object.
    */
   walk (obj: Object) {
     const keys = Object.keys(obj)
     for (let i = 0; i < keys.length; i++) {
-      defineReactive(obj, keys[i], obj[keys[i]])
+      defineReactive(obj, keys[i])
     }
   }
 
@@ -78,17 +81,17 @@ export class Observer {
 // helpers
 
 /**
- * Augment an target Object or Array by intercepting
+ * Augment a target Object or Array by intercepting
  * the prototype chain using __proto__
  */
-function protoAugment (target, src: Object, keys: any) {
+function protoAugment (target, src: Object) {
   /* eslint-disable no-proto */
   target.__proto__ = src
   /* eslint-enable no-proto */
 }
 
 /**
- * Augment an target Object or Array by defining
+ * Augment a target Object or Array by defining
  * hidden properties.
  */
 /* istanbul ignore next */
@@ -112,7 +115,7 @@ export function observe (value: any, asRootData: ?boolean): Observer | void {
   if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
     ob = value.__ob__
   } else if (
-    observerState.shouldConvert &&
+    shouldObserve &&
     !isServerRendering() &&
     (Array.isArray(value) || isPlainObject(value)) &&
     Object.isExtensible(value) &&
@@ -146,6 +149,9 @@ export function defineReactive (
   // cater for pre-defined getter/setters
   const getter = property && property.get
   const setter = property && property.set
+  if ((!getter || setter) && arguments.length === 2) {
+    val = obj[key]
+  }
 
   let childOb = !shallow && observe(val)
   Object.defineProperty(obj, key, {
@@ -174,6 +180,8 @@ export function defineReactive (
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter()
       }
+      // #7981: for accessor properties without setter
+      if (getter && !setter) return
       if (setter) {
         setter.call(obj, newVal)
       } else {
@@ -191,6 +199,11 @@ export function defineReactive (
  * already exist.
  */
 export function set (target: Array<any> | Object, key: any, val: any): any {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(`Cannot set reactive property on undefined, null, or primitive value: ${(target: any)}`)
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.length = Math.max(target.length, key)
     target.splice(key, 1, val)
@@ -221,6 +234,11 @@ export function set (target: Array<any> | Object, key: any, val: any): any {
  * Delete a property and trigger change if necessary.
  */
 export function del (target: Array<any> | Object, key: any) {
+  if (process.env.NODE_ENV !== 'production' &&
+    (isUndef(target) || isPrimitive(target))
+  ) {
+    warn(`Cannot delete reactive property on undefined, null, or primitive value: ${(target: any)}`)
+  }
   if (Array.isArray(target) && isValidArrayIndex(key)) {
     target.splice(key, 1)
     return
diff --git a/src/core/observer/scheduler.js b/src/core/observer/scheduler.js
index fce86e5f40b..ed5c504a50c 100644
--- a/src/core/observer/scheduler.js
+++ b/src/core/observer/scheduler.js
@@ -7,7 +7,9 @@ import { callHook, activateChildComponent } from '../instance/lifecycle'
 import {
   warn,
   nextTick,
-  devtools
+  devtools,
+  inBrowser,
+  isIE
 } from '../util/index'
 
 export const MAX_UPDATE_COUNT = 100
@@ -32,10 +34,42 @@ function resetSchedulerState () {
   waiting = flushing = false
 }
 
+// Async edge case #6566 requires saving the timestamp when event listeners are
+// attached. However, calling performance.now() has a perf overhead especially
+// if the page has thousands of event listeners. Instead, we take a timestamp
+// every time the scheduler flushes and use that for all event listeners
+// attached during that flush.
+export let currentFlushTimestamp = 0
+
+// Async edge case fix requires storing an event listener's attach timestamp.
+let getNow: () => number = Date.now
+
+// Determine what event timestamp the browser is using. Annoyingly, the
+// timestamp can either be hi-res (relative to page load) or low-res
+// (relative to UNIX epoch), so in order to compare time we have to use the
+// same timestamp type when saving the flush timestamp.
+// All IE versions use low-res event timestamps, and have problematic clock
+// implementations (#9632)
+if (inBrowser && !isIE) {
+  const performance = window.performance
+  if (
+    performance &&
+    typeof performance.now === 'function' &&
+    getNow() > document.createEvent('Event').timeStamp
+  ) {
+    // if the event timestamp, although evaluated AFTER the Date.now(), is
+    // smaller than it, it means the event is using a hi-res timestamp,
+    // and we need to use the hi-res version for event listener timestamps as
+    // well.
+    getNow = () => performance.now()
+  }
+}
+
 /**
  * Flush both queues and run the watchers.
  */
 function flushSchedulerQueue () {
+  currentFlushTimestamp = getNow()
   flushing = true
   let watcher, id
 
@@ -53,6 +87,9 @@ function flushSchedulerQueue () {
   // as we run existing watchers
   for (index = 0; index < queue.length; index++) {
     watcher = queue[index]
+    if (watcher.before) {
+      watcher.before()
+    }
     id = watcher.id
     has[id] = null
     watcher.run()
@@ -95,7 +132,7 @@ function callUpdatedHooks (queue) {
   while (i--) {
     const watcher = queue[i]
     const vm = watcher.vm
-    if (vm._watcher === watcher && vm._isMounted) {
+    if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
       callHook(vm, 'updated')
     }
   }
@@ -142,6 +179,11 @@ export function queueWatcher (watcher: Watcher) {
     // queue the flush
     if (!waiting) {
       waiting = true
+
+      if (process.env.NODE_ENV !== 'production' && !config.async) {
+        flushSchedulerQueue()
+        return
+      }
       nextTick(flushSchedulerQueue)
     }
   }
diff --git a/src/core/observer/traverse.js b/src/core/observer/traverse.js
index 37c71e9cf98..6b26524affc 100644
--- a/src/core/observer/traverse.js
+++ b/src/core/observer/traverse.js
@@ -2,6 +2,7 @@
 
 import { _Set as Set, isObject } from '../util/index'
 import type { SimpleSet } from '../util/index'
+import VNode from '../vdom/vnode'
 
 const seenObjects = new Set()
 
@@ -18,7 +19,7 @@ export function traverse (val: any) {
 function _traverse (val: any, seen: SimpleSet) {
   let i, keys
   const isA = Array.isArray(val)
-  if ((!isA && !isObject(val)) || Object.isFrozen(val)) {
+  if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
     return
   }
   if (val.__ob__) {
diff --git a/src/core/observer/watcher.js b/src/core/observer/watcher.js
index 48a2e612e28..1b1c0534c00 100644
--- a/src/core/observer/watcher.js
+++ b/src/core/observer/watcher.js
@@ -6,7 +6,9 @@ import {
   isObject,
   parsePath,
   _Set as Set,
-  handleError
+  handleError,
+  invokeWithErrorHandling,
+  noop
 } from '../util/index'
 
 import { traverse } from './traverse'
@@ -37,6 +39,7 @@ export default class Watcher {
   newDeps: Array<Dep>;
   depIds: SimpleSet;
   newDepIds: SimpleSet;
+  before: ?Function;
   getter: Function;
   value: any;
 
@@ -58,6 +61,7 @@ export default class Watcher {
       this.user = !!options.user
       this.lazy = !!options.lazy
       this.sync = !!options.sync
+      this.before = options.before
     } else {
       this.deep = this.user = this.lazy = this.sync = false
     }
@@ -78,7 +82,7 @@ export default class Watcher {
     } else {
       this.getter = parsePath(expOrFn)
       if (!this.getter) {
-        this.getter = function () {}
+        this.getter = noop
         process.env.NODE_ENV !== 'production' && warn(
           `Failed watching path: "${expOrFn}" ` +
           'Watcher only accepts simple dot-delimited paths. ' +
@@ -188,11 +192,8 @@ export default class Watcher {
         const oldValue = this.value
         this.value = value
         if (this.user) {
-          try {
-            this.cb.call(this.vm, value, oldValue)
-          } catch (e) {
-            handleError(e, this.vm, `callback for watcher "${this.expression}"`)
-          }
+          const info = `callback for watcher "${this.expression}"`
+          invokeWithErrorHandling(this.cb, this.vm, [value, oldValue], this.vm, info)
         } else {
           this.cb.call(this.vm, value, oldValue)
         }
diff --git a/src/core/util/debug.js b/src/core/util/debug.js
index 6b7315f4b20..4aef7b53d4c 100644
--- a/src/core/util/debug.js
+++ b/src/core/util/debug.js
@@ -41,7 +41,7 @@ if (process.env.NODE_ENV !== 'production') {
       ? vm.options
       : vm._isVue
         ? vm.$options || vm.constructor.options
-        : vm || {}
+        : vm
     let name = options.name || options._componentTag
     const file = options.__file
     if (!name && file) {
diff --git a/src/core/util/env.js b/src/core/util/env.js
index dc332e280dc..820bacdb405 100644
--- a/src/core/util/env.js
+++ b/src/core/util/env.js
@@ -14,6 +14,8 @@ export const isEdge = UA && UA.indexOf('edge/') > 0
 export const isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android')
 export const isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios')
 export const isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge
+export const isPhantomJS = UA && /phantomjs/.test(UA)
+export const isFF = UA && UA.match(/firefox\/(\d+)/)
 
 // Firefox has a "watch" function on Object.prototype...
 export const nativeWatch = ({}).watch
@@ -38,10 +40,10 @@ let _isServer
 export const isServerRendering = () => {
   if (_isServer === undefined) {
     /* istanbul ignore if */
-    if (!inBrowser && typeof global !== 'undefined') {
+    if (!inBrowser && !inWeex && typeof global !== 'undefined') {
       // detect presence of vue-server-renderer and avoid
       // Webpack shimming the process
-      _isServer = global['process'].env.VUE_ENV === 'server'
+      _isServer = global['process'] && global['process'].env.VUE_ENV === 'server'
     } else {
       _isServer = false
     }
@@ -85,11 +87,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
   }
 }
 
-interface SimpleSet {
+export interface SimpleSet {
   has(key: string | number): boolean;
   add(key: string | number): mixed;
   clear(): void;
 }
 
 export { _Set }
-export type { SimpleSet }
diff --git a/src/core/util/error.js b/src/core/util/error.js
index b7d05a6d7c6..4dbdbc7443d 100644
--- a/src/core/util/error.js
+++ b/src/core/util/error.js
@@ -3,25 +3,56 @@
 import config from '../config'
 import { warn } from './debug'
 import { inBrowser, inWeex } from './env'
+import { isPromise } from 'shared/util'
+import { pushTarget, popTarget } from '../observer/dep'
 
 export function handleError (err: Error, vm: any, info: string) {
-  if (vm) {
-    let cur = vm
-    while ((cur = cur.$parent)) {
-      const hooks = cur.$options.errorCaptured
-      if (hooks) {
-        for (let i = 0; i < hooks.length; i++) {
-          try {
-            const capture = hooks[i].call(cur, err, vm, info) === false
-            if (capture) return
-          } catch (e) {
-            globalHandleError(e, cur, 'errorCaptured hook')
+  // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
+  // See: https://github.com/vuejs/vuex/issues/1505
+  pushTarget()
+  try {
+    if (vm) {
+      let cur = vm
+      while ((cur = cur.$parent)) {
+        const hooks = cur.$options.errorCaptured
+        if (hooks) {
+          for (let i = 0; i < hooks.length; i++) {
+            try {
+              const capture = hooks[i].call(cur, err, vm, info) === false
+              if (capture) return
+            } catch (e) {
+              globalHandleError(e, cur, 'errorCaptured hook')
+            }
           }
         }
       }
     }
+    globalHandleError(err, vm, info)
+  } finally {
+    popTarget()
   }
-  globalHandleError(err, vm, info)
+}
+
+export function invokeWithErrorHandling (
+  handler: Function,
+  context: any,
+  args: null | any[],
+  vm: any,
+  info: string
+) {
+  let res
+  try {
+    res = args ? handler.apply(context, args) : handler.call(context)
+    if (res && !res._isVue && isPromise(res) && !res._handled) {
+      res.catch(e => handleError(e, vm, info + ` (Promise/async)`))
+      // issue #9511
+      // avoid catch triggering multiple times when nested calls
+      res._handled = true
+    }
+  } catch (e) {
+    handleError(e, vm, info)
+  }
+  return res
 }
 
 function globalHandleError (err, vm, info) {
@@ -29,7 +60,11 @@ function globalHandleError (err, vm, info) {
     try {
       return config.errorHandler.call(null, err, vm, info)
     } catch (e) {
-      logError(e, null, 'config.errorHandler')
+      // if the user intentionally throws the original error in the handler,
+      // do not log it twice
+      if (e !== err) {
+        logError(e, null, 'config.errorHandler')
+      }
     }
   }
   logError(err, vm, info)
diff --git a/src/core/util/lang.js b/src/core/util/lang.js
index 96b8219a045..89436944d39 100644
--- a/src/core/util/lang.js
+++ b/src/core/util/lang.js
@@ -1,5 +1,12 @@
 /* @flow */
 
+/**
+ * unicode letters used for parsing html tags, component names and property paths.
+ * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
+ * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
+ */
+export const unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/
+
 /**
  * Check if a string starts with $ or _
  */
@@ -23,7 +30,7 @@ export function def (obj: Object, key: string, val: any, enumerable?: boolean) {
 /**
  * Parse simple path.
  */
-const bailRE = /[^\w.$]/
+const bailRE = new RegExp(`[^${unicodeRegExp.source}.$_\\d]`)
 export function parsePath (path: string): any {
   if (bailRE.test(path)) {
     return
diff --git a/src/core/util/next-tick.js b/src/core/util/next-tick.js
index 9e4f476d65b..2efb9a9518d 100644
--- a/src/core/util/next-tick.js
+++ b/src/core/util/next-tick.js
@@ -1,9 +1,11 @@
 /* @flow */
-/* globals MessageChannel */
+/* globals MutationObserver */
 
 import { noop } from 'shared/util'
 import { handleError } from './error'
-import { isIOS, isNative } from './env'
+import { isIE, isIOS, isNative } from './env'
+
+export let isUsingMicroTask = false
 
 const callbacks = []
 let pending = false
@@ -17,74 +19,69 @@ function flushCallbacks () {
   }
 }
 
-// Here we have async deferring wrappers using both micro and macro tasks.
-// In < 2.4 we used micro tasks everywhere, but there are some scenarios where
-// micro tasks have too high a priority and fires in between supposedly
-// sequential events (e.g. #4521, #6690) or even between bubbling of the same
-// event (#6566). However, using macro tasks everywhere also has subtle problems
-// when state is changed right before repaint (e.g. #6813, out-in transitions).
-// Here we use micro task by default, but expose a way to force macro task when
-// needed (e.g. in event handlers attached by v-on).
-let microTimerFunc
-let macroTimerFunc
-let useMacroTask = false
+// Here we have async deferring wrappers using microtasks.
+// In 2.5 we used (macro) tasks (in combination with microtasks).
+// However, it has subtle problems when state is changed right before repaint
+// (e.g. #6813, out-in transitions).
+// Also, using (macro) tasks in event handler would cause some weird behaviors
+// that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
+// So we now use microtasks everywhere, again.
+// A major drawback of this tradeoff is that there are some scenarios
+// where microtasks have too high a priority and fire in between supposedly
+// sequential events (e.g. #4521, #6690, which have workarounds)
+// or even between bubbling of the same event (#6566).
+let timerFunc
 
-// Determine (macro) Task defer implementation.
-// Technically setImmediate should be the ideal choice, but it's only available
-// in IE. The only polyfill that consistently queues the callback after all DOM
-// events triggered in the same loop is by using MessageChannel.
-/* istanbul ignore if */
-if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
-  macroTimerFunc = () => {
-    setImmediate(flushCallbacks)
-  }
-} else if (typeof MessageChannel !== 'undefined' && (
-  isNative(MessageChannel) ||
-  // PhantomJS
-  MessageChannel.toString() === '[object MessageChannelConstructor]'
-)) {
-  const channel = new MessageChannel()
-  const port = channel.port2
-  channel.port1.onmessage = flushCallbacks
-  macroTimerFunc = () => {
-    port.postMessage(1)
-  }
-} else {
-  /* istanbul ignore next */
-  macroTimerFunc = () => {
-    setTimeout(flushCallbacks, 0)
-  }
-}
-
-// Determine MicroTask defer implementation.
+// The nextTick behavior leverages the microtask queue, which can be accessed
+// via either native Promise.then or MutationObserver.
+// MutationObserver has wider support, however it is seriously bugged in
+// UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
+// completely stops working after triggering a few times... so, if native
+// Promise is available, we will use it:
 /* istanbul ignore next, $flow-disable-line */
 if (typeof Promise !== 'undefined' && isNative(Promise)) {
   const p = Promise.resolve()
-  microTimerFunc = () => {
+  timerFunc = () => {
     p.then(flushCallbacks)
-    // in problematic UIWebViews, Promise.then doesn't completely break, but
+    // In problematic UIWebViews, Promise.then doesn't completely break, but
     // it can get stuck in a weird state where callbacks are pushed into the
     // microtask queue but the queue isn't being flushed, until the browser
     // needs to do some other work, e.g. handle a timer. Therefore we can
     // "force" the microtask queue to be flushed by adding an empty timer.
     if (isIOS) setTimeout(noop)
   }
-} else {
-  // fallback to macro
-  microTimerFunc = macroTimerFunc
-}
-
-/**
- * Wrap a function so that if any code inside triggers state change,
- * the changes are queued using a Task instead of a MicroTask.
- */
-export function withMacroTask (fn: Function): Function {
-  return fn._withTask || (fn._withTask = function () {
-    useMacroTask = true
-    const res = fn.apply(null, arguments)
-    useMacroTask = false
-    return res
+  isUsingMicroTask = true
+} else if (!isIE && typeof MutationObserver !== 'undefined' && (
+  isNative(MutationObserver) ||
+  // PhantomJS and iOS 7.x
+  MutationObserver.toString() === '[object MutationObserverConstructor]'
+)) {
+  // Use MutationObserver where native Promise is not available,
+  // e.g. PhantomJS, iOS7, Android 4.4
+  // (#6466 MutationObserver is unreliable in IE11)
+  let counter = 1
+  const observer = new MutationObserver(flushCallbacks)
+  const textNode = document.createTextNode(String(counter))
+  observer.observe(textNode, {
+    characterData: true
   })
+  timerFunc = () => {
+    counter = (counter + 1) % 2
+    textNode.data = String(counter)
+  }
+  isUsingMicroTask = true
+} else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
+  // Fallback to setImmediate.
+  // Technically it leverages the (macro) task queue,
+  // but it is still a better choice than setTimeout.
+  timerFunc = () => {
+    setImmediate(flushCallbacks)
+  }
+} else {
+  // Fallback to setTimeout.
+  timerFunc = () => {
+    setTimeout(flushCallbacks, 0)
+  }
 }
 
 export function nextTick (cb?: Function, ctx?: Object) {
@@ -102,11 +99,7 @@ export function nextTick (cb?: Function, ctx?: Object) {
   })
   if (!pending) {
     pending = true
-    if (useMacroTask) {
-      macroTimerFunc()
-    } else {
-      microTimerFunc()
-    }
+    timerFunc()
   }
   // $flow-disable-line
   if (!cb && typeof Promise !== 'undefined') {
diff --git a/src/core/util/options.js b/src/core/util/options.js
index 5f0d10d3361..243567859de 100644
--- a/src/core/util/options.js
+++ b/src/core/util/options.js
@@ -2,8 +2,9 @@
 
 import config from '../config'
 import { warn } from './debug'
-import { nativeWatch } from './env'
 import { set } from '../observer/index'
+import { unicodeRegExp } from './lang'
+import { nativeWatch, hasSymbol } from './env'
 
 import {
   ASSET_TYPES,
@@ -48,14 +49,24 @@ if (process.env.NODE_ENV !== 'production') {
 function mergeData (to: Object, from: ?Object): Object {
   if (!from) return to
   let key, toVal, fromVal
-  const keys = Object.keys(from)
+
+  const keys = hasSymbol
+    ? Reflect.ownKeys(from)
+    : Object.keys(from)
+
   for (let i = 0; i < keys.length; i++) {
     key = keys[i]
+    // in case the object is already observed...
+    if (key === '__ob__') continue
     toVal = to[key]
     fromVal = from[key]
     if (!hasOwn(to, key)) {
       set(to, key, fromVal)
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal)
     }
   }
@@ -136,13 +147,26 @@ function mergeHook (
   parentVal: ?Array<Function>,
   childVal: ?Function | ?Array<Function>
 ): ?Array<Function> {
-  return childVal
+  const res = childVal
     ? parentVal
       ? parentVal.concat(childVal)
       : Array.isArray(childVal)
         ? childVal
         : [childVal]
     : parentVal
+  return res
+    ? dedupeHooks(res)
+    : res
+}
+
+function dedupeHooks (hooks) {
+  const res = []
+  for (let i = 0; i < hooks.length; i++) {
+    if (res.indexOf(hooks[i]) === -1) {
+      res.push(hooks[i])
+    }
+  }
+  return res
 }
 
 LIFECYCLE_HOOKS.forEach(hook => {
@@ -253,11 +277,10 @@ function checkComponents (options: Object) {
 }
 
 export function validateComponentName (name: string) {
-  if (!/^[a-zA-Z][\w-]*$/.test(name)) {
+  if (!new RegExp(`^[a-zA-Z][\\-\\.0-9_${unicodeRegExp.source}]*$`).test(name)) {
     warn(
       'Invalid component name: "' + name + '". Component names ' +
-      'can only contain alphanumeric characters and the hyphen, ' +
-      'and must start with a letter.'
+      'should conform to valid custom element name in html5 specification.'
     )
   }
   if (isBuiltInTag(name) || config.isReservedTag(name)) {
@@ -378,15 +401,22 @@ export function mergeOptions (
   normalizeProps(child, vm)
   normalizeInject(child, vm)
   normalizeDirectives(child)
-  const extendsFrom = child.extends
-  if (extendsFrom) {
-    parent = mergeOptions(parent, extendsFrom, vm)
-  }
-  if (child.mixins) {
-    for (let i = 0, l = child.mixins.length; i < l; i++) {
-      parent = mergeOptions(parent, child.mixins[i], vm)
+
+  // Apply extends and mixins on the child options,
+  // but only if it is a raw options object that isn't
+  // the result of another mergeOptions call.
+  // Only merged options has the _base property.
+  if (!child._base) {
+    if (child.extends) {
+      parent = mergeOptions(parent, child.extends, vm)
+    }
+    if (child.mixins) {
+      for (let i = 0, l = child.mixins.length; i < l; i++) {
+        parent = mergeOptions(parent, child.mixins[i], vm)
+      }
     }
   }
+
   const options = {}
   let key
   for (key in parent) {
diff --git a/src/core/util/perf.js b/src/core/util/perf.js
index 4a537b2dada..c0c8a277633 100644
--- a/src/core/util/perf.js
+++ b/src/core/util/perf.js
@@ -18,7 +18,7 @@ if (process.env.NODE_ENV !== 'production') {
       perf.measure(name, startTag, endTag)
       perf.clearMarks(startTag)
       perf.clearMarks(endTag)
-      perf.clearMeasures(name)
+      // perf.clearMeasures(name)
     }
   }
 }
diff --git a/src/core/util/props.js b/src/core/util/props.js
index bea6c92691e..5a90f21b5f0 100644
--- a/src/core/util/props.js
+++ b/src/core/util/props.js
@@ -1,7 +1,7 @@
 /* @flow */
 
 import { warn } from './debug'
-import { observe, observerState } from '../observer/index'
+import { observe, toggleObserving, shouldObserve } from '../observer/index'
 import {
   hasOwn,
   isObject,
@@ -27,12 +27,18 @@ export function validateProp (
   const prop = propOptions[key]
   const absent = !hasOwn(propsData, key)
   let value = propsData[key]
-  // handle boolean props
-  if (isType(Boolean, prop.type)) {
+  // boolean casting
+  const booleanIndex = getTypeIndex(Boolean, prop.type)
+  if (booleanIndex > -1) {
     if (absent && !hasOwn(prop, 'default')) {
       value = false
-    } else if (!isType(String, prop.type) && (value === '' || value === hyphenate(key))) {
-      value = true
+    } else if (value === '' || value === hyphenate(key)) {
+      // only cast empty string / same name to boolean if
+      // boolean has higher priority
+      const stringIndex = getTypeIndex(String, prop.type)
+      if (stringIndex < 0 || booleanIndex < stringIndex) {
+        value = true
+      }
     }
   }
   // check default value
@@ -40,10 +46,10 @@ export function validateProp (
     value = getPropDefaultValue(vm, prop, key)
     // since the default value is a fresh copy,
     // make sure to observe it.
-    const prevShouldConvert = observerState.shouldConvert
-    observerState.shouldConvert = true
+    const prevShouldObserve = shouldObserve
+    toggleObserving(true)
     observe(value)
-    observerState.shouldConvert = prevShouldConvert
+    toggleObserving(prevShouldObserve)
   }
   if (
     process.env.NODE_ENV !== 'production' &&
@@ -116,16 +122,16 @@ function assertProp (
       type = [type]
     }
     for (let i = 0; i < type.length && !valid; i++) {
-      const assertedType = assertType(value, type[i])
+      const assertedType = assertType(value, type[i], vm)
       expectedTypes.push(assertedType.expectedType || '')
       valid = assertedType.valid
     }
   }
-  if (!valid) {
+
+  const haveExpectedTypes = expectedTypes.some(t => t)
+  if (!valid && haveExpectedTypes) {
     warn(
-      `Invalid prop: type check failed for prop "${name}".` +
-      ` Expected ${expectedTypes.map(capitalize).join(', ')}` +
-      `, got ${toRawType(value)}.`,
+      getInvalidTypeMessage(name, value, expectedTypes),
       vm
     )
     return
@@ -141,9 +147,9 @@ function assertProp (
   }
 }
 
-const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/
+const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol|BigInt)$/
 
-function assertType (value: any, type: Function): {
+function assertType (value: any, type: Function, vm: ?Component): {
   valid: boolean;
   expectedType: string;
 } {
@@ -161,7 +167,12 @@ function assertType (value: any, type: Function): {
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value)
   } else {
-    valid = value instanceof type
+    try {
+      valid = value instanceof type
+    } catch (e) {
+      warn('Invalid prop type: "' + String(type) + '" is not a constructor', vm);
+      valid = false;
+    }
   }
   return {
     valid,
@@ -169,25 +180,71 @@ function assertType (value: any, type: Function): {
   }
 }
 
+const functionTypeCheckRE = /^\s*function (\w+)/
+
 /**
  * Use function string name to check built-in types,
  * because a simple equality check will fail when running
  * across different vms / iframes.
  */
 function getType (fn) {
-  const match = fn && fn.toString().match(/^\s*function (\w+)/)
+  const match = fn && fn.toString().match(functionTypeCheckRE)
   return match ? match[1] : ''
 }
 
-function isType (type, fn) {
-  if (!Array.isArray(fn)) {
-    return getType(fn) === getType(type)
+function isSameType (a, b) {
+  return getType(a) === getType(b)
+}
+
+function getTypeIndex (type, expectedTypes): number {
+  if (!Array.isArray(expectedTypes)) {
+    return isSameType(expectedTypes, type) ? 0 : -1
   }
-  for (let i = 0, len = fn.length; i < len; i++) {
-    if (getType(fn[i]) === getType(type)) {
-      return true
+  for (let i = 0, len = expectedTypes.length; i < len; i++) {
+    if (isSameType(expectedTypes[i], type)) {
+      return i
     }
   }
-  /* istanbul ignore next */
-  return false
+  return -1
+}
+
+function getInvalidTypeMessage (name, value, expectedTypes) {
+  let message = `Invalid prop: type check failed for prop "${name}".` +
+    ` Expected ${expectedTypes.map(capitalize).join(', ')}`
+  const expectedType = expectedTypes[0]
+  const receivedType = toRawType(value)
+  // check if we need to specify expected value
+  if (
+    expectedTypes.length === 1 &&
+    isExplicable(expectedType) &&
+    isExplicable(typeof value) &&
+    !isBoolean(expectedType, receivedType)
+  ) {
+    message += ` with value ${styleValue(value, expectedType)}`
+  }
+  message += `, got ${receivedType} `
+  // check if we need to specify received value
+  if (isExplicable(receivedType)) {
+    message += `with value ${styleValue(value, receivedType)}.`
+  }
+  return message
+}
+
+function styleValue (value, type) {
+  if (type === 'String') {
+    return `"${value}"`
+  } else if (type === 'Number') {
+    return `${Number(value)}`
+  } else {
+    return `${value}`
+  }
+}
+
+const EXPLICABLE_TYPES = ['string', 'number', 'boolean']
+function isExplicable (value) {
+  return EXPLICABLE_TYPES.some(elem => value.toLowerCase() === elem)
+}
+
+function isBoolean (...args) {
+  return args.some(elem => elem.toLowerCase() === 'boolean')
 }
diff --git a/src/core/vdom/create-component.js b/src/core/vdom/create-component.js
index 7872bd2a5e5..380902000df 100644
--- a/src/core/vdom/create-component.js
+++ b/src/core/vdom/create-component.js
@@ -32,14 +32,9 @@ import {
   renderRecyclableComponentTemplate
 } from 'weex/runtime/recycle-list/render-component-template'
 
-// hooks to be invoked on component VNodes during patch
+// inline hooks to be invoked on component VNodes during patch
 const componentVNodeHooks = {
-  init (
-    vnode: VNodeWithData,
-    hydrating: boolean,
-    parentElm: ?Node,
-    refElm: ?Node
-  ): ?boolean {
+  init (vnode: VNodeWithData, hydrating: boolean): ?boolean {
     if (
       vnode.componentInstance &&
       !vnode.componentInstance._isDestroyed &&
@@ -51,9 +46,7 @@ const componentVNodeHooks = {
     } else {
       const child = vnode.componentInstance = createComponentInstanceForVnode(
         vnode,
-        activeInstance,
-        parentElm,
-        refElm
+        activeInstance
       )
       child.$mount(hydrating ? vnode.elm : undefined, hydrating)
     }
@@ -136,7 +129,7 @@ export function createComponent (
   let asyncFactory
   if (isUndef(Ctor.cid)) {
     asyncFactory = Ctor
-    Ctor = resolveAsyncComponent(asyncFactory, baseCtor, context)
+    Ctor = resolveAsyncComponent(asyncFactory, baseCtor)
     if (Ctor === undefined) {
       // return a placeholder node for async component, which is rendered
       // as a comment node but preserves all the raw information for the node.
@@ -189,8 +182,8 @@ export function createComponent (
     }
   }
 
-  // merge component management hooks onto the placeholder node
-  mergeHooks(data)
+  // install component management hooks onto the placeholder node
+  installComponentHooks(data)
 
   // return a placeholder vnode
   const name = Ctor.options.name || tag
@@ -213,17 +206,15 @@ export function createComponent (
 }
 
 export function createComponentInstanceForVnode (
-  vnode: any, // we know it's MountedComponentVNode but flow doesn't
-  parent: any, // activeInstance in lifecycle state
-  parentElm?: ?Node,
-  refElm?: ?Node
+  // we know it's MountedComponentVNode but flow doesn't
+  vnode: any,
+  // activeInstance in lifecycle state
+  parent: any
 ): Component {
   const options: InternalComponentOptions = {
     _isComponent: true,
-    parent,
     _parentVnode: vnode,
-    _parentElm: parentElm || null,
-    _refElm: refElm || null
+    parent
   }
   // check inline-template render functions
   const inlineTemplate = vnode.data.inlineTemplate
@@ -234,23 +225,26 @@ export function createComponentInstanceForVnode (
   return new vnode.componentOptions.Ctor(options)
 }
 
-function mergeHooks (data: VNodeData) {
-  if (!data.hook) {
-    data.hook = {}
-  }
+function installComponentHooks (data: VNodeData) {
+  const hooks = data.hook || (data.hook = {})
   for (let i = 0; i < hooksToMerge.length; i++) {
     const key = hooksToMerge[i]
-    const fromParent = data.hook[key]
-    const ours = componentVNodeHooks[key]
-    data.hook[key] = fromParent ? mergeHook(ours, fromParent) : ours
+    const existing = hooks[key]
+    const toMerge = componentVNodeHooks[key]
+    if (existing !== toMerge && !(existing && existing._merged)) {
+      hooks[key] = existing ? mergeHook(toMerge, existing) : toMerge
+    }
   }
 }
 
-function mergeHook (one: Function, two: Function): Function {
-  return function (a, b, c, d) {
-    one(a, b, c, d)
-    two(a, b, c, d)
+function mergeHook (f1: any, f2: any): Function {
+  const merged = (a, b) => {
+    // flow complains about extra args which is why we use any
+    f1(a, b)
+    f2(a, b)
   }
+  merged._merged = true
+  return merged
 }
 
 // transform component v-model info (value and callback) into
@@ -258,11 +252,19 @@ function mergeHook (one: Function, two: Function): Function {
 function transformModel (options, data: any) {
   const prop = (options.model && options.model.prop) || 'value'
   const event = (options.model && options.model.event) || 'input'
-  ;(data.props || (data.props = {}))[prop] = data.model.value
+  ;(data.attrs || (data.attrs = {}))[prop] = data.model.value
   const on = data.on || (data.on = {})
-  if (isDef(on[event])) {
-    on[event] = [data.model.callback].concat(on[event])
+  const existing = on[event]
+  const callback = data.model.callback
+  if (isDef(existing)) {
+    if (
+      Array.isArray(existing)
+        ? existing.indexOf(callback) === -1
+        : existing !== callback
+    ) {
+      on[event] = [callback].concat(existing)
+    }
   } else {
-    on[event] = data.model.callback
+    on[event] = callback
   }
 }
diff --git a/src/core/vdom/create-element.js b/src/core/vdom/create-element.js
index c5cde2c6424..bc81aa2b89c 100644
--- a/src/core/vdom/create-element.js
+++ b/src/core/vdom/create-element.js
@@ -98,11 +98,17 @@ export function _createElement (
     ns = (context.$vnode && context.$vnode.ns) || config.getTagNamespace(tag)
     if (config.isReservedTag(tag)) {
       // platform built-in elements
+      if (process.env.NODE_ENV !== 'production' && isDef(data) && isDef(data.nativeOn) && data.tag !== 'component') {
+        warn(
+          `The .native modifier for v-on is only valid on components but it was used on <${tag}>.`,
+          context
+        )
+      }
       vnode = new VNode(
         config.parsePlatformTagName(tag), data, children,
         undefined, undefined, context
       )
-    } else if (isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
+    } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
       vnode = createComponent(Ctor, data, context, children, tag)
     } else {
diff --git a/src/core/vdom/create-functional-component.js b/src/core/vdom/create-functional-component.js
index d0cbd0a2584..c6edf65dfe2 100644
--- a/src/core/vdom/create-functional-component.js
+++ b/src/core/vdom/create-functional-component.js
@@ -1,41 +1,70 @@
 /* @flow */
 
-import VNode from './vnode'
+import VNode, { cloneVNode } from './vnode'
 import { createElement } from './create-element'
 import { resolveInject } from '../instance/inject'
 import { normalizeChildren } from '../vdom/helpers/normalize-children'
 import { resolveSlots } from '../instance/render-helpers/resolve-slots'
+import { normalizeScopedSlots } from '../vdom/helpers/normalize-scoped-slots'
 import { installRenderHelpers } from '../instance/render-helpers/index'
 
 import {
   isDef,
   isTrue,
+  hasOwn,
   camelize,
   emptyObject,
   validateProp
 } from '../util/index'
 
-function FunctionalRenderContext (
-  data,
-  props,
-  children,
-  parent,
-  Ctor
+export function FunctionalRenderContext (
+  data: VNodeData,
+  props: Object,
+  children: ?Array<VNode>,
+  parent: Component,
+  Ctor: Class<Component>
 ) {
   const options = Ctor.options
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  let contextVm
+  if (hasOwn(parent, '_uid')) {
+    contextVm = Object.create(parent)
+    // $flow-disable-line
+    contextVm._original = parent
+  } else {
+    // the context vm passed in is a functional context as well.
+    // in this case we want to make sure we are able to get a hold to the
+    // real context instance.
+    contextVm = parent
+    // $flow-disable-line
+    parent = parent._original
+  }
+  const isCompiled = isTrue(options._compiled)
+  const needNormalization = !isCompiled
+
   this.data = data
   this.props = props
   this.children = children
   this.parent = parent
   this.listeners = data.on || emptyObject
   this.injections = resolveInject(options.inject, parent)
-  this.slots = () => resolveSlots(children, parent)
+  this.slots = () => {
+    if (!this.$slots) {
+      normalizeScopedSlots(
+        data.scopedSlots,
+        this.$slots = resolveSlots(children, parent)
+      )
+    }
+    return this.$slots
+  }
 
-  // ensure the createElement function in functional components
-  // gets a unique context - this is necessary for correct named slot check
-  const contextVm = Object.create(parent)
-  const isCompiled = isTrue(options._compiled)
-  const needNormalization = !isCompiled
+  Object.defineProperty(this, 'scopedSlots', ({
+    enumerable: true,
+    get () {
+      return normalizeScopedSlots(data.scopedSlots, this.slots())
+    }
+  }: any))
 
   // support for compiled functional template
   if (isCompiled) {
@@ -43,7 +72,7 @@ function FunctionalRenderContext (
     this.$options = options
     // pre-resolve slots for renderSlot()
     this.$slots = this.slots()
-    this.$scopedSlots = data.scopedSlots || emptyObject
+    this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots)
   }
 
   if (options._scopeId) {
@@ -92,23 +121,31 @@ export function createFunctionalComponent (
   const vnode = options.render.call(null, renderContext._c, renderContext)
 
   if (vnode instanceof VNode) {
-    setFunctionalContextForVNode(vnode, data, contextVm, options)
-    return vnode
+    return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext)
   } else if (Array.isArray(vnode)) {
     const vnodes = normalizeChildren(vnode) || []
+    const res = new Array(vnodes.length)
     for (let i = 0; i < vnodes.length; i++) {
-      setFunctionalContextForVNode(vnodes[i], data, contextVm, options)
+      res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext)
     }
-    return vnodes
+    return res
   }
 }
 
-function setFunctionalContextForVNode (vnode, data, vm, options) {
-  vnode.fnContext = vm
-  vnode.fnOptions = options
+function cloneAndMarkFunctionalResult (vnode, data, contextVm, options, renderContext) {
+  // #7817 clone node before setting fnContext, otherwise if the node is reused
+  // (e.g. it was from a cached normal slot) the fnContext causes named slots
+  // that should not be matched to match.
+  const clone = cloneVNode(vnode)
+  clone.fnContext = contextVm
+  clone.fnOptions = options
+  if (process.env.NODE_ENV !== 'production') {
+    (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext
+  }
   if (data.slot) {
-    (vnode.data || (vnode.data = {})).slot = data.slot
+    (clone.data || (clone.data = {})).slot = data.slot
   }
+  return clone
 }
 
 function mergeProps (to, from) {
diff --git a/src/core/vdom/helpers/normalize-scoped-slots.js b/src/core/vdom/helpers/normalize-scoped-slots.js
new file mode 100644
index 00000000000..13df231f43c
--- /dev/null
+++ b/src/core/vdom/helpers/normalize-scoped-slots.js
@@ -0,0 +1,86 @@
+/* @flow */
+
+import { def } from 'core/util/lang'
+import { normalizeChildren } from 'core/vdom/helpers/normalize-children'
+import { emptyObject } from 'shared/util'
+import { isAsyncPlaceholder } from './is-async-placeholder'
+
+export function normalizeScopedSlots (
+  slots: { [key: string]: Function } | void,
+  normalSlots: { [key: string]: Array<VNode> },
+  prevSlots?: { [key: string]: Function } | void
+): any {
+  let res
+  const hasNormalSlots = Object.keys(normalSlots).length > 0
+  const isStable = slots ? !!slots.$stable : !hasNormalSlots
+  const key = slots && slots.$key
+  if (!slots) {
+    res = {}
+  } else if (slots._normalized) {
+    // fast path 1: child component re-render only, parent did not change
+    return slots._normalized
+  } else if (
+    isStable &&
+    prevSlots &&
+    prevSlots !== emptyObject &&
+    key === prevSlots.$key &&
+    !hasNormalSlots &&
+    !prevSlots.$hasNormal
+  ) {
+    // fast path 2: stable scoped slots w/ no normal slots to proxy,
+    // only need to normalize once
+    return prevSlots
+  } else {
+    res = {}
+    for (const key in slots) {
+      if (slots[key] && key[0] !== '$') {
+        res[key] = normalizeScopedSlot(normalSlots, key, slots[key])
+      }
+    }
+  }
+  // expose normal slots on scopedSlots
+  for (const key in normalSlots) {
+    if (!(key in res)) {
+      res[key] = proxyNormalSlot(normalSlots, key)
+    }
+  }
+  // avoriaz seems to mock a non-extensible $scopedSlots object
+  // and when that is passed down this would cause an error
+  if (slots && Object.isExtensible(slots)) {
+    (slots: any)._normalized = res
+  }
+  def(res, '$stable', isStable)
+  def(res, '$key', key)
+  def(res, '$hasNormal', hasNormalSlots)
+  return res
+}
+
+function normalizeScopedSlot(normalSlots, key, fn) {
+  const normalized = function () {
+    let res = arguments.length ? fn.apply(null, arguments) : fn({})
+    res = res && typeof res === 'object' && !Array.isArray(res)
+      ? [res] // single vnode
+      : normalizeChildren(res)
+    let vnode: ?VNode = res && res[0]
+    return res && (
+      !vnode ||
+      (res.length === 1 && vnode.isComment && !isAsyncPlaceholder(vnode)) // #9658, #10391
+    ) ? undefined
+      : res
+  }
+  // this is a slot using the new v-slot syntax without scope. although it is
+  // compiled as a scoped slot, render fn users would expect it to be present
+  // on this.$slots because the usage is semantically a normal slot.
+  if (fn.proxy) {
+    Object.defineProperty(normalSlots, key, {
+      get: normalized,
+      enumerable: true,
+      configurable: true
+    })
+  }
+  return normalized
+}
+
+function proxyNormalSlot(slots, key) {
+  return () => slots[key]
+}
diff --git a/src/core/vdom/helpers/resolve-async-component.js b/src/core/vdom/helpers/resolve-async-component.js
index 99ce5ce47ed..5fc00fab4af 100644
--- a/src/core/vdom/helpers/resolve-async-component.js
+++ b/src/core/vdom/helpers/resolve-async-component.js
@@ -7,10 +7,13 @@ import {
   isUndef,
   isTrue,
   isObject,
-  hasSymbol
+  hasSymbol,
+  isPromise,
+  remove
 } from 'core/util/index'
 
 import { createEmptyVNode } from 'core/vdom/vnode'
+import { currentRenderingInstance } from 'core/instance/render'
 
 function ensureCtor (comp: any, base) {
   if (
@@ -39,8 +42,7 @@ export function createAsyncPlaceholder (
 
 export function resolveAsyncComponent (
   factory: Function,
-  baseCtor: Class<Component>,
-  context: Component
+  baseCtor: Class<Component>
 ): Class<Component> | void {
   if (isTrue(factory.error) && isDef(factory.errorComp)) {
     return factory.errorComp
@@ -50,20 +52,39 @@ export function resolveAsyncComponent (
     return factory.resolved
   }
 
+  const owner = currentRenderingInstance
+  if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
+    // already pending
+    factory.owners.push(owner)
+  }
+
   if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
     return factory.loadingComp
   }
 
-  if (isDef(factory.contexts)) {
-    // already pending
-    factory.contexts.push(context)
-  } else {
-    const contexts = factory.contexts = [context]
+  if (owner && !isDef(factory.owners)) {
+    const owners = factory.owners = [owner]
     let sync = true
+    let timerLoading = null
+    let timerTimeout = null
+
+    ;(owner: any).$on('hook:destroyed', () => remove(owners, owner))
 
-    const forceRender = () => {
-      for (let i = 0, l = contexts.length; i < l; i++) {
-        contexts[i].$forceUpdate()
+    const forceRender = (renderCompleted: boolean) => {
+      for (let i = 0, l = owners.length; i < l; i++) {
+        (owners[i]: any).$forceUpdate()
+      }
+
+      if (renderCompleted) {
+        owners.length = 0
+        if (timerLoading !== null) {
+          clearTimeout(timerLoading)
+          timerLoading = null
+        }
+        if (timerTimeout !== null) {
+          clearTimeout(timerTimeout)
+          timerTimeout = null
+        }
       }
     }
 
@@ -73,7 +94,9 @@ export function resolveAsyncComponent (
       // invoke callbacks only if this is not a synchronous resolve
       // (async resolves are shimmed as synchronous during SSR)
       if (!sync) {
-        forceRender()
+        forceRender(true)
+      } else {
+        owners.length = 0
       }
     })
 
@@ -84,19 +107,19 @@ export function resolveAsyncComponent (
       )
       if (isDef(factory.errorComp)) {
         factory.error = true
-        forceRender()
+        forceRender(true)
       }
     })
 
     const res = factory(resolve, reject)
 
     if (isObject(res)) {
-      if (typeof res.then === 'function') {
+      if (isPromise(res)) {
         // () => Promise
         if (isUndef(factory.resolved)) {
           res.then(resolve, reject)
         }
-      } else if (isDef(res.component) && typeof res.component.then === 'function') {
+      } else if (isPromise(res.component)) {
         res.component.then(resolve, reject)
 
         if (isDef(res.error)) {
@@ -108,17 +131,19 @@ export function resolveAsyncComponent (
           if (res.delay === 0) {
             factory.loading = true
           } else {
-            setTimeout(() => {
+            timerLoading = setTimeout(() => {
+              timerLoading = null
               if (isUndef(factory.resolved) && isUndef(factory.error)) {
                 factory.loading = true
-                forceRender()
+                forceRender(false)
               }
             }, res.delay || 200)
           }
         }
 
         if (isDef(res.timeout)) {
-          setTimeout(() => {
+          timerTimeout = setTimeout(() => {
+            timerTimeout = null
             if (isUndef(factory.resolved)) {
               reject(
                 process.env.NODE_ENV !== 'production'
diff --git a/src/core/vdom/helpers/update-listeners.js b/src/core/vdom/helpers/update-listeners.js
index 11c5a2cd2f8..dcde7f488fe 100644
--- a/src/core/vdom/helpers/update-listeners.js
+++ b/src/core/vdom/helpers/update-listeners.js
@@ -1,7 +1,15 @@
 /* @flow */
 
-import { warn } from 'core/util/index'
-import { cached, isUndef, isPlainObject } from 'shared/util'
+import {
+  warn,
+  invokeWithErrorHandling
+} from 'core/util/index'
+import {
+  cached,
+  isUndef,
+  isTrue,
+  isPlainObject
+} from 'shared/util'
 
 const normalizeEvent = cached((name: string): {
   name: string,
@@ -25,17 +33,17 @@ const normalizeEvent = cached((name: string): {
   }
 })
 
-export function createFnInvoker (fns: Function | Array<Function>): Function {
+export function createFnInvoker (fns: Function | Array<Function>, vm: ?Component): Function {
   function invoker () {
     const fns = invoker.fns
     if (Array.isArray(fns)) {
       const cloned = fns.slice()
       for (let i = 0; i < cloned.length; i++) {
-        cloned[i].apply(null, arguments)
+        invokeWithErrorHandling(cloned[i], null, arguments, vm, `v-on handler`)
       }
     } else {
       // return handler return value for single handlers
-      return fns.apply(null, arguments)
+      return invokeWithErrorHandling(fns, null, arguments, vm, `v-on handler`)
     }
   }
   invoker.fns = fns
@@ -47,6 +55,7 @@ export function updateListeners (
   oldOn: Object,
   add: Function,
   remove: Function,
+  createOnceHandler: Function,
   vm: Component
 ) {
   let name, def, cur, old, event
@@ -66,9 +75,12 @@ export function updateListeners (
       )
     } else if (isUndef(old)) {
       if (isUndef(cur.fns)) {
-        cur = on[name] = createFnInvoker(cur)
+        cur = on[name] = createFnInvoker(cur, vm)
       }
-      add(event.name, cur, event.once, event.capture, event.passive, event.params)
+      if (isTrue(event.once)) {
+        cur = on[name] = createOnceHandler(event.name, cur, event.capture)
+      }
+      add(event.name, cur, event.capture, event.passive, event.params)
     } else if (cur !== old) {
       old.fns = cur
       on[name] = old
diff --git a/src/core/vdom/modules/directives.js b/src/core/vdom/modules/directives.js
index 639982fab59..ed76c6272ad 100644
--- a/src/core/vdom/modules/directives.js
+++ b/src/core/vdom/modules/directives.js
@@ -40,6 +40,7 @@ function _update (oldVnode, vnode) {
     } else {
       // existing directive, update
       dir.oldValue = oldDir.value
+      dir.oldArg = oldDir.arg
       callHook(dir, 'update', vnode, oldVnode)
       if (dir.def && dir.def.componentUpdated) {
         dirsWithPostpatch.push(dir)
diff --git a/src/core/vdom/modules/ref.js b/src/core/vdom/modules/ref.js
index 00bb5f52709..aa9bdcfcfba 100644
--- a/src/core/vdom/modules/ref.js
+++ b/src/core/vdom/modules/ref.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { remove } from 'shared/util'
+import { remove, isDef } from 'shared/util'
 
 export default {
   create (_: any, vnode: VNodeWithData) {
@@ -19,7 +19,7 @@ export default {
 
 export function registerRef (vnode: VNodeWithData, isRemoval: ?boolean) {
   const key = vnode.data.ref
-  if (!key) return
+  if (!isDef(key)) return
 
   const vm = vnode.context
   const ref = vnode.componentInstance || vnode.elm
diff --git a/src/core/vdom/patch.js b/src/core/vdom/patch.js
index da9850856a2..bff48f44bea 100644
--- a/src/core/vdom/patch.js
+++ b/src/core/vdom/patch.js
@@ -34,7 +34,8 @@ const hooks = ['create', 'activate', 'update', 'remove', 'destroy']
 
 function sameVnode (a, b) {
   return (
-    a.key === b.key && (
+    a.key === b.key &&
+    a.asyncFactory === b.asyncFactory && (
       (
         a.tag === b.tag &&
         a.isComment === b.isComment &&
@@ -42,7 +43,6 @@ function sameVnode (a, b) {
         sameInputType(a, b)
       ) || (
         isTrue(a.isAsyncPlaceholder) &&
-        a.asyncFactory === b.asyncFactory &&
         isUndef(b.asyncFactory.error)
       )
     )
@@ -212,7 +212,7 @@ export function createPatchFunction (backend) {
     if (isDef(i)) {
       const isReactivated = isDef(vnode.componentInstance) && i.keepAlive
       if (isDef(i = i.hook) && isDef(i = i.init)) {
-        i(vnode, false /* hydrating */, parentElm, refElm)
+        i(vnode, false /* hydrating */)
       }
       // after calling the init hook, if the vnode is a child component
       // it should've created a child instance and mounted it. the child
@@ -220,6 +220,7 @@ export function createPatchFunction (backend) {
       // in that case we can just return the element and be done.
       if (isDef(vnode.componentInstance)) {
         initComponent(vnode, insertedVnodeQueue)
+        insert(parentElm, vnode.elm, refElm)
         if (isTrue(isReactivated)) {
           reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm)
         }
@@ -271,7 +272,7 @@ export function createPatchFunction (backend) {
   function insert (parent, elm, ref) {
     if (isDef(parent)) {
       if (isDef(ref)) {
-        if (ref.parentNode === parent) {
+        if (nodeOps.parentNode(ref) === parent) {
           nodeOps.insertBefore(parent, elm, ref)
         }
       } else {
@@ -317,12 +318,12 @@ export function createPatchFunction (backend) {
   function setScope (vnode) {
     let i
     if (isDef(i = vnode.fnScopeId)) {
-      nodeOps.setAttribute(vnode.elm, i, '')
+      nodeOps.setStyleScope(vnode.elm, i)
     } else {
       let ancestor = vnode
       while (ancestor) {
         if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
-          nodeOps.setAttribute(vnode.elm, i, '')
+          nodeOps.setStyleScope(vnode.elm, i)
         }
         ancestor = ancestor.parent
       }
@@ -333,7 +334,7 @@ export function createPatchFunction (backend) {
       i !== vnode.fnContext &&
       isDef(i = i.$options._scopeId)
     ) {
-      nodeOps.setAttribute(vnode.elm, i, '')
+      nodeOps.setStyleScope(vnode.elm, i)
     }
   }
 
@@ -357,7 +358,7 @@ export function createPatchFunction (backend) {
     }
   }
 
-  function removeVnodes (parentElm, vnodes, startIdx, endIdx) {
+  function removeVnodes (vnodes, startIdx, endIdx) {
     for (; startIdx <= endIdx; ++startIdx) {
       const ch = vnodes[startIdx]
       if (isDef(ch)) {
@@ -426,20 +427,20 @@ export function createPatchFunction (backend) {
       } else if (isUndef(oldEndVnode)) {
         oldEndVnode = oldCh[--oldEndIdx]
       } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue)
+        patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx)
         oldStartVnode = oldCh[++oldStartIdx]
         newStartVnode = newCh[++newStartIdx]
       } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue)
+        patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx)
         oldEndVnode = oldCh[--oldEndIdx]
         newEndVnode = newCh[--newEndIdx]
       } else if (sameVnode(oldStartVnode, newEndVnode)) { // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue)
+        patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx)
         canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm))
         oldStartVnode = oldCh[++oldStartIdx]
         newEndVnode = newCh[--newEndIdx]
       } else if (sameVnode(oldEndVnode, newStartVnode)) { // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue)
+        patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx)
         canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm)
         oldEndVnode = oldCh[--oldEndIdx]
         newStartVnode = newCh[++newStartIdx]
@@ -453,7 +454,7 @@ export function createPatchFunction (backend) {
         } else {
           vnodeToMove = oldCh[idxInOld]
           if (sameVnode(vnodeToMove, newStartVnode)) {
-            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue)
+            patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx)
             oldCh[idxInOld] = undefined
             canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm)
           } else {
@@ -468,7 +469,7 @@ export function createPatchFunction (backend) {
       refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm
       addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue)
     } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx)
+      removeVnodes(oldCh, oldStartIdx, oldEndIdx)
     }
   }
 
@@ -497,11 +498,23 @@ export function createPatchFunction (backend) {
     }
   }
 
-  function patchVnode (oldVnode, vnode, insertedVnodeQueue, removeOnly) {
+  function patchVnode (
+    oldVnode,
+    vnode,
+    insertedVnodeQueue,
+    ownerArray,
+    index,
+    removeOnly
+  ) {
     if (oldVnode === vnode) {
       return
     }
 
+    if (isDef(vnode.elm) && isDef(ownerArray)) {
+      // clone reused vnode
+      vnode = ownerArray[index] = cloneVNode(vnode)
+    }
+
     const elm = vnode.elm = oldVnode.elm
 
     if (isTrue(oldVnode.isAsyncPlaceholder)) {
@@ -542,10 +555,13 @@ export function createPatchFunction (backend) {
       if (isDef(oldCh) && isDef(ch)) {
         if (oldCh !== ch) updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly)
       } else if (isDef(ch)) {
+        if (process.env.NODE_ENV !== 'production') {
+          checkDuplicateKeys(ch)
+        }
         if (isDef(oldVnode.text)) nodeOps.setTextContent(elm, '')
         addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue)
       } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1)
+        removeVnodes(oldCh, 0, oldCh.length - 1)
       } else if (isDef(oldVnode.text)) {
         nodeOps.setTextContent(elm, '')
       }
@@ -681,7 +697,7 @@ export function createPatchFunction (backend) {
     }
   }
 
-  return function patch (oldVnode, vnode, hydrating, removeOnly, parentElm, refElm) {
+  return function patch (oldVnode, vnode, hydrating, removeOnly) {
     if (isUndef(vnode)) {
       if (isDef(oldVnode)) invokeDestroyHook(oldVnode)
       return
@@ -693,12 +709,12 @@ export function createPatchFunction (backend) {
     if (isUndef(oldVnode)) {
       // empty mount (likely as component), create new root element
       isInitialPatch = true
-      createElm(vnode, insertedVnodeQueue, parentElm, refElm)
+      createElm(vnode, insertedVnodeQueue)
     } else {
       const isRealElement = isDef(oldVnode.nodeType)
       if (!isRealElement && sameVnode(oldVnode, vnode)) {
         // patch existing root node
-        patchVnode(oldVnode, vnode, insertedVnodeQueue, removeOnly)
+        patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly)
       } else {
         if (isRealElement) {
           // mounting to a real element
@@ -774,7 +790,7 @@ export function createPatchFunction (backend) {
 
         // destroy old node
         if (isDef(parentElm)) {
-          removeVnodes(parentElm, [oldVnode], 0, 0)
+          removeVnodes([oldVnode], 0, 0)
         } else if (isDef(oldVnode.tag)) {
           invokeDestroyHook(oldVnode)
         }
diff --git a/src/core/vdom/vnode.js b/src/core/vdom/vnode.js
index c2daed6b331..bdc17e9f974 100644
--- a/src/core/vdom/vnode.js
+++ b/src/core/vdom/vnode.js
@@ -26,7 +26,8 @@ export default class VNode {
   ssrContext: Object | void;
   fnContext: Component | void; // real context vm for functional nodes
   fnOptions: ?ComponentOptions; // for SSR caching
-  fnScopeId: ?string; // functioanl scope id support
+  devtoolsMeta: ?Object; // used to store functional render context for devtools
+  fnScopeId: ?string; // functional scope id support
 
   constructor (
     tag?: string,
@@ -89,7 +90,10 @@ export function cloneVNode (vnode: VNode): VNode {
   const cloned = new VNode(
     vnode.tag,
     vnode.data,
-    vnode.children,
+    // #7975
+    // clone children array to avoid mutating original in case of cloning
+    // a child.
+    vnode.children && vnode.children.slice(),
     vnode.text,
     vnode.elm,
     vnode.context,
@@ -103,6 +107,7 @@ export function cloneVNode (vnode: VNode): VNode {
   cloned.fnContext = vnode.fnContext
   cloned.fnOptions = vnode.fnOptions
   cloned.fnScopeId = vnode.fnScopeId
+  cloned.asyncMeta = vnode.asyncMeta
   cloned.isCloned = true
   return cloned
 }
diff --git a/src/platforms/web/compiler/directives/html.js b/src/platforms/web/compiler/directives/html.js
index 58569d8e47e..a4b7062eb6e 100644
--- a/src/platforms/web/compiler/directives/html.js
+++ b/src/platforms/web/compiler/directives/html.js
@@ -4,6 +4,6 @@ import { addProp } from 'compiler/helpers'
 
 export default function html (el: ASTElement, dir: ASTDirective) {
   if (dir.value) {
-    addProp(el, 'innerHTML', `_s(${dir.value})`)
+    addProp(el, 'innerHTML', `_s(${dir.value})`, dir)
   }
 }
diff --git a/src/platforms/web/compiler/directives/model.js b/src/platforms/web/compiler/directives/model.js
index 2533ba3560f..a42096109a5 100644
--- a/src/platforms/web/compiler/directives/model.js
+++ b/src/platforms/web/compiler/directives/model.js
@@ -28,7 +28,8 @@ export default function model (
     if (tag === 'input' && type === 'file') {
       warn(
         `<${el.tag} v-model="${value}" type="file">:\n` +
-        `File inputs are read only. Use a v-on:change listener instead.`
+        `File inputs are read only. Use a v-on:change listener instead.`,
+        el.rawAttrsMap['v-model']
       )
     }
   }
@@ -54,7 +55,8 @@ export default function model (
       `<${el.tag} v-model="${value}">: ` +
       `v-model is not supported on this element type. ` +
       'If you are working with contenteditable, it\'s recommended to ' +
-      'wrap a library dedicated for that purpose inside a custom component.'
+      'wrap a library dedicated for that purpose inside a custom component.',
+      el.rawAttrsMap['v-model']
     )
   }
 
@@ -86,8 +88,8 @@ function genCheckboxModel (
     'if(Array.isArray($$a)){' +
       `var $$v=${number ? '_n(' + valueBinding + ')' : valueBinding},` +
           '$$i=_i($$a,$$v);' +
-      `if($$el.checked){$$i<0&&(${value}=$$a.concat([$$v]))}` +
-      `else{$$i>-1&&(${value}=$$a.slice(0,$$i).concat($$a.slice($$i+1)))}` +
+      `if($$el.checked){$$i<0&&(${genAssignmentCode(value, '$$a.concat([$$v])')})}` +
+      `else{$$i>-1&&(${genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))')})}` +
     `}else{${genAssignmentCode(value, '$$c')}}`,
     null, true
   )
@@ -130,13 +132,16 @@ function genDefaultModel (
   const type = el.attrsMap.type
 
   // warn if v-bind:value conflicts with v-model
+  // except for inputs with v-bind:type
   if (process.env.NODE_ENV !== 'production') {
     const value = el.attrsMap['v-bind:value'] || el.attrsMap[':value']
-    if (value) {
+    const typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type']
+    if (value && !typeBinding) {
       const binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value'
       warn(
         `${binding}="${value}" conflicts with v-model on the same element ` +
-        'because the latter already expands to a value binding internally'
+        'because the latter already expands to a value binding internally',
+        el.rawAttrsMap[binding]
       )
     }
   }
diff --git a/src/platforms/web/compiler/directives/text.js b/src/platforms/web/compiler/directives/text.js
index 1af914f8ea0..c434d3e3686 100644
--- a/src/platforms/web/compiler/directives/text.js
+++ b/src/platforms/web/compiler/directives/text.js
@@ -4,6 +4,6 @@ import { addProp } from 'compiler/helpers'
 
 export default function text (el: ASTElement, dir: ASTDirective) {
   if (dir.value) {
-    addProp(el, 'textContent', `_s(${dir.value})`)
+    addProp(el, 'textContent', `_s(${dir.value})`, dir)
   }
 }
diff --git a/src/platforms/web/compiler/modules/class.js b/src/platforms/web/compiler/modules/class.js
index ffdca250991..378c959c9d7 100644
--- a/src/platforms/web/compiler/modules/class.js
+++ b/src/platforms/web/compiler/modules/class.js
@@ -17,12 +17,13 @@ function transformNode (el: ASTElement, options: CompilerOptions) {
         `class="${staticClass}": ` +
         'Interpolation inside attributes has been removed. ' +
         'Use v-bind or the colon shorthand instead. For example, ' +
-        'instead of <div class="{{ val }}">, use <div :class="val">.'
+        'instead of <div class="{{ val }}">, use <div :class="val">.',
+        el.rawAttrsMap['class']
       )
     }
   }
   if (staticClass) {
-    el.staticClass = JSON.stringify(staticClass)
+    el.staticClass = JSON.stringify(staticClass.replace(/\s+/g, ' ').trim())
   }
   const classBinding = getBindingAttr(el, 'class', false /* getStatic */)
   if (classBinding) {
diff --git a/src/platforms/web/compiler/modules/model.js b/src/platforms/web/compiler/modules/model.js
index a7426c0204f..ced689029ed 100644
--- a/src/platforms/web/compiler/modules/model.js
+++ b/src/platforms/web/compiler/modules/model.js
@@ -1,7 +1,7 @@
 /* @flow */
 
 /**
- * Expand input[v-model] with dyanmic type bindings into v-if-else chains
+ * Expand input[v-model] with dynamic type bindings into v-if-else chains
  * Turn this:
  *   <input v-model="data[type]" :type="type">
  * into this:
@@ -34,7 +34,7 @@ function preTransformNode (el: ASTElement, options: CompilerOptions) {
     if (map[':type'] || map['v-bind:type']) {
       typeBinding = getBindingAttr(el, 'type')
     }
-    if (!typeBinding && map['v-bind']) {
+    if (!map.type && !typeBinding && map['v-bind']) {
       typeBinding = `(${map['v-bind']}).type`
     }
 
diff --git a/src/platforms/web/compiler/modules/style.js b/src/platforms/web/compiler/modules/style.js
index 2722b92b44d..8c6bb98857c 100644
--- a/src/platforms/web/compiler/modules/style.js
+++ b/src/platforms/web/compiler/modules/style.js
@@ -20,7 +20,8 @@ function transformNode (el: ASTElement, options: CompilerOptions) {
           `style="${staticStyle}": ` +
           'Interpolation inside attributes has been removed. ' +
           'Use v-bind or the colon shorthand instead. For example, ' +
-          'instead of <div style="{{ val }}">, use <div :style="val">.'
+          'instead of <div style="{{ val }}">, use <div :style="val">.',
+          el.rawAttrsMap['style']
         )
       }
     }
diff --git a/src/platforms/web/entry-compiler.js b/src/platforms/web/entry-compiler.js
index ee63476e1eb..15a4f685999 100644
--- a/src/platforms/web/entry-compiler.js
+++ b/src/platforms/web/entry-compiler.js
@@ -3,3 +3,4 @@
 export { parseComponent } from 'sfc/parser'
 export { compile, compileToFunctions } from './compiler/index'
 export { ssrCompile, ssrCompileToFunctions } from './server/compiler'
+export { generateCodeFrame } from 'compiler/codeframe'
diff --git a/src/platforms/web/entry-runtime-with-compiler.js b/src/platforms/web/entry-runtime-with-compiler.js
index 1ebc102df71..2bb46362bf9 100644
--- a/src/platforms/web/entry-runtime-with-compiler.js
+++ b/src/platforms/web/entry-runtime-with-compiler.js
@@ -63,6 +63,7 @@ Vue.prototype.$mount = function (
       }
 
       const { render, staticRenderFns } = compileToFunctions(template, {
+        outputSourceRange: process.env.NODE_ENV !== 'production',
         shouldDecodeNewlines,
         shouldDecodeNewlinesForHref,
         delimiters: options.delimiters,
diff --git a/src/platforms/web/runtime/class-util.js b/src/platforms/web/runtime/class-util.js
index 709526c238a..12f0b5e243e 100644
--- a/src/platforms/web/runtime/class-util.js
+++ b/src/platforms/web/runtime/class-util.js
@@ -1,5 +1,7 @@
 /* @flow */
 
+const whitespaceRE = /\s+/
+
 /**
  * Add class with compatibility for SVG since classList is not supported on
  * SVG elements in IE
@@ -13,7 +15,7 @@ export function addClass (el: HTMLElement, cls: ?string) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(c => el.classList.add(c))
+      cls.split(whitespaceRE).forEach(c => el.classList.add(c))
     } else {
       el.classList.add(cls)
     }
@@ -38,7 +40,7 @@ export function removeClass (el: HTMLElement, cls: ?string) {
   /* istanbul ignore else */
   if (el.classList) {
     if (cls.indexOf(' ') > -1) {
-      cls.split(/\s+/).forEach(c => el.classList.remove(c))
+      cls.split(whitespaceRE).forEach(c => el.classList.remove(c))
     } else {
       el.classList.remove(cls)
     }
diff --git a/src/platforms/web/runtime/components/transition-group.js b/src/platforms/web/runtime/components/transition-group.js
index 219ff01cf54..084f394cd0d 100644
--- a/src/platforms/web/runtime/components/transition-group.js
+++ b/src/platforms/web/runtime/components/transition-group.js
@@ -14,6 +14,7 @@
 import { warn, extend } from 'core/util/index'
 import { addClass, removeClass } from '../class-util'
 import { transitionProps, extractTransitionData } from './transition'
+import { setActiveInstance } from 'core/instance/lifecycle'
 
 import {
   hasTransition,
@@ -33,6 +34,23 @@ delete props.mode
 export default {
   props,
 
+  beforeMount () {
+    const update = this._update
+    this._update = (vnode, hydrating) => {
+      const restoreActiveInstance = setActiveInstance(this)
+      // force removing pass
+      this.__patch__(
+        this._vnode,
+        this.kept,
+        false, // hydrating
+        true // removeOnly (!important, avoids unnecessary moves)
+      )
+      this._vnode = this.kept
+      restoreActiveInstance()
+      update.call(this, vnode, hydrating)
+    }
+  },
+
   render (h: Function) {
     const tag: string = this.tag || this.$vnode.data.tag || 'span'
     const map: Object = Object.create(null)
@@ -76,17 +94,6 @@ export default {
     return h(tag, null, children)
   },
 
-  beforeUpdate () {
-    // force removing pass
-    this.__patch__(
-      this._vnode,
-      this.kept,
-      false, // hydrating
-      true // removeOnly (!important, avoids unnecessary moves)
-    )
-    this._vnode = this.kept
-  },
-
   updated () {
     const children: Array<VNode> = this.prevChildren
     const moveClass: string = this.moveClass || ((this.name || 'v') + '-move')
@@ -107,11 +114,14 @@ export default {
 
     children.forEach((c: VNode) => {
       if (c.data.moved) {
-        var el: any = c.elm
-        var s: any = el.style
+        const el: any = c.elm
+        const s: any = el.style
         addTransitionClass(el, moveClass)
         s.transform = s.WebkitTransform = s.transitionDuration = ''
         el.addEventListener(transitionEndEvent, el._moveCb = function cb (e) {
+          if (e && e.target !== el) {
+            return
+          }
           if (!e || /transform$/.test(e.propertyName)) {
             el.removeEventListener(transitionEndEvent, cb)
             el._moveCb = null
diff --git a/src/platforms/web/runtime/components/transition.js b/src/platforms/web/runtime/components/transition.js
index 6111d8cbbcb..84fe82984a1 100644
--- a/src/platforms/web/runtime/components/transition.js
+++ b/src/platforms/web/runtime/components/transition.js
@@ -76,6 +76,10 @@ function isSameChild (child: VNode, oldChild: VNode): boolean {
   return oldChild.key === child.key && oldChild.tag === child.tag
 }
 
+const isNotTextNode = (c: VNode) => c.tag || isAsyncPlaceholder(c)
+
+const isVShowDirective = d => d.name === 'show'
+
 export default {
   name: 'transition',
   props: transitionProps,
@@ -88,7 +92,7 @@ export default {
     }
 
     // filter out text nodes (possible whitespaces)
-    children = children.filter((c: VNode) => c.tag || isAsyncPlaceholder(c))
+    children = children.filter(isNotTextNode)
     /* istanbul ignore if */
     if (!children.length) {
       return
@@ -153,7 +157,7 @@ export default {
 
     // mark v-show
     // so that the transition module can hand over the control to the directive
-    if (child.data.directives && child.data.directives.some(d => d.name === 'show')) {
+    if (child.data.directives && child.data.directives.some(isVShowDirective)) {
       child.data.show = true
     }
 
diff --git a/src/platforms/web/runtime/directives/model.js b/src/platforms/web/runtime/directives/model.js
index c3b669f3bb5..cba8ded0d94 100644
--- a/src/platforms/web/runtime/directives/model.js
+++ b/src/platforms/web/runtime/directives/model.js
@@ -6,7 +6,7 @@
 import { isTextInputType } from 'web/util/element'
 import { looseEqual, looseIndexOf } from 'shared/util'
 import { mergeVNodeHook } from 'core/vdom/helpers/index'
-import { warn, isAndroid, isIE9, isIE, isEdge } from 'core/util/index'
+import { warn, isIE9, isIE, isEdge } from 'core/util/index'
 
 /* istanbul ignore if */
 if (isIE9) {
@@ -34,15 +34,13 @@ const directive = {
     } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
       el._vModifiers = binding.modifiers
       if (!binding.modifiers.lazy) {
+        el.addEventListener('compositionstart', onCompositionStart)
+        el.addEventListener('compositionend', onCompositionEnd)
         // Safari < 10.2 & UIWebView doesn't fire compositionend when
         // switching focus before confirming composition choice
         // this also fixes the issue where some browsers e.g. iOS Chrome
         // fires "change" instead of "input" on autocomplete.
         el.addEventListener('change', onCompositionEnd)
-        if (!isAndroid) {
-          el.addEventListener('compositionstart', onCompositionStart)
-          el.addEventListener('compositionend', onCompositionEnd)
-        }
         /* istanbul ignore if */
         if (isIE9) {
           el.vmodel = true
diff --git a/src/platforms/web/runtime/directives/show.js b/src/platforms/web/runtime/directives/show.js
index 703aa5b6afe..17fb5dec20d 100644
--- a/src/platforms/web/runtime/directives/show.js
+++ b/src/platforms/web/runtime/directives/show.js
@@ -27,7 +27,7 @@ export default {
 
   update (el: any, { value, oldValue }: VNodeDirective, vnode: VNodeWithData) {
     /* istanbul ignore if */
-    if (value === oldValue) return
+    if (!value === !oldValue) return
     vnode = locateNode(vnode)
     const transition = vnode.data && vnode.data.transition
     if (transition) {
diff --git a/src/platforms/web/runtime/index.js b/src/platforms/web/runtime/index.js
index 71fe444a19d..fa645696533 100644
--- a/src/platforms/web/runtime/index.js
+++ b/src/platforms/web/runtime/index.js
@@ -4,7 +4,7 @@ import Vue from 'core/index'
 import config from 'core/config'
 import { extend, noop } from 'shared/util'
 import { mountComponent } from 'core/instance/lifecycle'
-import { devtools, inBrowser, isChrome } from 'core/util/index'
+import { devtools, inBrowser } from 'core/util/index'
 
 import {
   query,
@@ -44,32 +44,33 @@ Vue.prototype.$mount = function (
 
 // devtools global hook
 /* istanbul ignore next */
-Vue.nextTick(() => {
-  if (config.devtools) {
-    if (devtools) {
-      devtools.emit('init', Vue)
-    } else if (
-      process.env.NODE_ENV !== 'production' &&
+if (inBrowser) {
+  setTimeout(() => {
+    if (config.devtools) {
+      if (devtools) {
+        devtools.emit('init', Vue)
+      } else if (
+        process.env.NODE_ENV !== 'production' &&
+        process.env.NODE_ENV !== 'test'
+      ) {
+        console[console.info ? 'info' : 'log'](
+          'Download the Vue Devtools extension for a better development experience:\n' +
+          'https://github.com/vuejs/vue-devtools'
+        )
+      }
+    }
+    if (process.env.NODE_ENV !== 'production' &&
       process.env.NODE_ENV !== 'test' &&
-      isChrome
+      config.productionTip !== false &&
+      typeof console !== 'undefined'
     ) {
       console[console.info ? 'info' : 'log'](
-        'Download the Vue Devtools extension for a better development experience:\n' +
-        'https://github.com/vuejs/vue-devtools'
+        `You are running Vue in development mode.\n` +
+        `Make sure to turn on production mode when deploying for production.\n` +
+        `See more tips at https://v2.vuejs.org/v2/guide/deployment.html`
       )
     }
-  }
-  if (process.env.NODE_ENV !== 'production' &&
-    process.env.NODE_ENV !== 'test' &&
-    config.productionTip !== false &&
-    inBrowser && typeof console !== 'undefined'
-  ) {
-    console[console.info ? 'info' : 'log'](
-      `You are running Vue in development mode.\n` +
-      `Make sure to turn on production mode when deploying for production.\n` +
-      `See more tips at https://vuejs.org/guide/deployment.html`
-    )
-  }
-}, 0)
+  }, 0)
+}
 
 export default Vue
diff --git a/src/platforms/web/runtime/modules/attrs.js b/src/platforms/web/runtime/modules/attrs.js
index 0034d35e81d..f6dc500a404 100644
--- a/src/platforms/web/runtime/modules/attrs.js
+++ b/src/platforms/web/runtime/modules/attrs.js
@@ -14,7 +14,8 @@ import {
   getXlinkProp,
   isBooleanAttr,
   isEnumeratedAttr,
-  isFalsyAttrValue
+  isFalsyAttrValue,
+  convertEnumeratedValue
 } from 'web/util/index'
 
 function updateAttrs (oldVnode: VNodeWithData, vnode: VNodeWithData) {
@@ -38,7 +39,7 @@ function updateAttrs (oldVnode: VNodeWithData, vnode: VNodeWithData) {
     cur = attrs[key]
     old = oldAttrs[key]
     if (old !== cur) {
-      setAttr(elm, key, cur)
+      setAttr(elm, key, cur, vnode.data.pre)
     }
   }
   // #4391: in IE9, setting type can reset value for input[type=radio]
@@ -58,8 +59,10 @@ function updateAttrs (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   }
 }
 
-function setAttr (el: Element, key: string, value: any) {
-  if (isBooleanAttr(key)) {
+function setAttr (el: Element, key: string, value: any, isInPre: any) {
+  if (isInPre || el.tagName.indexOf('-') > -1) {
+    baseSetAttr(el, key, value)
+  } else if (isBooleanAttr(key)) {
     // set attribute for blank value
     // e.g. <option disabled>Select one</option>
     if (isFalsyAttrValue(value)) {
@@ -73,7 +76,7 @@ function setAttr (el: Element, key: string, value: any) {
       el.setAttribute(key, value)
     }
   } else if (isEnumeratedAttr(key)) {
-    el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true')
+    el.setAttribute(key, convertEnumeratedValue(key, value))
   } else if (isXlink(key)) {
     if (isFalsyAttrValue(value)) {
       el.removeAttributeNS(xlinkNS, getXlinkProp(key))
@@ -81,28 +84,32 @@ function setAttr (el: Element, key: string, value: any) {
       el.setAttributeNS(xlinkNS, key, value)
     }
   } else {
-    if (isFalsyAttrValue(value)) {
-      el.removeAttribute(key)
-    } else {
-      // #7138: IE10 & 11 fires input event when setting placeholder on
-      // <textarea>... block the first input event and remove the blocker
-      // immediately.
-      /* istanbul ignore if */
-      if (
-        isIE && !isIE9 &&
-        el.tagName === 'TEXTAREA' &&
-        key === 'placeholder' && !el.__ieph
-      ) {
-        const blocker = e => {
-          e.stopImmediatePropagation()
-          el.removeEventListener('input', blocker)
-        }
-        el.addEventListener('input', blocker)
-        // $flow-disable-line
-        el.__ieph = true /* IE placeholder patched */
+    baseSetAttr(el, key, value)
+  }
+}
+
+function baseSetAttr (el, key, value) {
+  if (isFalsyAttrValue(value)) {
+    el.removeAttribute(key)
+  } else {
+    // #7138: IE10 & 11 fires input event when setting placeholder on
+    // <textarea>... block the first input event and remove the blocker
+    // immediately.
+    /* istanbul ignore if */
+    if (
+      isIE && !isIE9 &&
+      el.tagName === 'TEXTAREA' &&
+      key === 'placeholder' && value !== '' && !el.__ieph
+    ) {
+      const blocker = e => {
+        e.stopImmediatePropagation()
+        el.removeEventListener('input', blocker)
       }
-      el.setAttribute(key, value)
+      el.addEventListener('input', blocker)
+      // $flow-disable-line
+      el.__ieph = true /* IE placeholder patched */
     }
+    el.setAttribute(key, value)
   }
 }
 
diff --git a/src/platforms/web/runtime/modules/dom-props.js b/src/platforms/web/runtime/modules/dom-props.js
index f3888aed066..c24994966a0 100644
--- a/src/platforms/web/runtime/modules/dom-props.js
+++ b/src/platforms/web/runtime/modules/dom-props.js
@@ -1,6 +1,9 @@
 /* @flow */
 
 import { isDef, isUndef, extend, toNumber } from 'shared/util'
+import { isSVG } from 'web/util/index'
+
+let svgContainer
 
 function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
@@ -16,10 +19,11 @@ function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   }
 
   for (key in oldProps) {
-    if (isUndef(props[key])) {
+    if (!(key in props)) {
       elm[key] = ''
     }
   }
+
   for (key in props) {
     cur = props[key]
     // ignore children if the node has textContent or innerHTML,
@@ -35,7 +39,7 @@ function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
       }
     }
 
-    if (key === 'value') {
+    if (key === 'value' && elm.tagName !== 'PROGRESS') {
       // store value as _value as well since
       // non-string values will be stringified
       elm._value = cur
@@ -44,8 +48,29 @@ function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
       if (shouldUpdateValue(elm, strCur)) {
         elm.value = strCur
       }
-    } else {
-      elm[key] = cur
+    } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
+      // IE doesn't support innerHTML for SVG elements
+      svgContainer = svgContainer || document.createElement('div')
+      svgContainer.innerHTML = `<svg>${cur}</svg>`
+      const svg = svgContainer.firstChild
+      while (elm.firstChild) {
+        elm.removeChild(elm.firstChild)
+      }
+      while (svg.firstChild) {
+        elm.appendChild(svg.firstChild)
+      }
+    } else if (
+      // skip the update if old and new VDOM state is the same.
+      // `value` is handled separately because the DOM value may be temporarily
+      // out of sync with VDOM state due to focus, composition and modifiers.
+      // This  #4521 by skipping the unnecessary `checked` update.
+      cur !== oldProps[key]
+    ) {
+      // some property updates can throw
+      // e.g. `value` on <progress> w/ non-finite value
+      try {
+        elm[key] = cur
+      } catch (e) {}
     }
   }
 }
@@ -75,10 +100,6 @@ function isDirtyWithModifiers (elm: any, newVal: string): boolean {
   const value = elm.value
   const modifiers = elm._vModifiers // injected by v-model runtime
   if (isDef(modifiers)) {
-    if (modifiers.lazy) {
-      // inputs with lazy should only be updated when not in focus
-      return false
-    }
     if (modifiers.number) {
       return toNumber(value) !== toNumber(newVal)
     }
diff --git a/src/platforms/web/runtime/modules/events.js b/src/platforms/web/runtime/modules/events.js
index 1e71b667286..3c60fd5d1a3 100644
--- a/src/platforms/web/runtime/modules/events.js
+++ b/src/platforms/web/runtime/modules/events.js
@@ -2,8 +2,10 @@
 
 import { isDef, isUndef } from 'shared/util'
 import { updateListeners } from 'core/vdom/helpers/index'
-import { withMacroTask, isIE, supportsPassive } from 'core/util/index'
+import { isIE, isFF, supportsPassive, isUsingMicroTask } from 'core/util/index'
 import { RANGE_TOKEN, CHECKBOX_RADIO_TOKEN } from 'web/compiler/directives/model'
+import { currentFlushTimestamp } from 'core/observer/scheduler'
+import { emptyNode } from 'core/vdom/patch'
 
 // normalize v-model event tokens that can only be determined at runtime.
 // it's important to place the event as the first in the array because
@@ -28,7 +30,7 @@ function normalizeEvents (on) {
 
 let target: any
 
-function createOnceHandler (handler, event, capture) {
+function createOnceHandler (event, handler, capture) {
   const _target = target // save current target element in closure
   return function onceHandler () {
     const res = handler.apply(null, arguments)
@@ -38,17 +40,49 @@ function createOnceHandler (handler, event, capture) {
   }
 }
 
+// #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
+// implementation and does not fire microtasks in between event propagation, so
+// safe to exclude.
+const useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53)
+
 function add (
-  event: string,
+  name: string,
   handler: Function,
-  once: boolean,
   capture: boolean,
   passive: boolean
 ) {
-  handler = withMacroTask(handler)
-  if (once) handler = createOnceHandler(handler, event, capture)
+  // async edge case #6566: inner click event triggers patch, event handler
+  // attached to outer element during patch, and triggered again. This
+  // happens because browsers fire microtask ticks between event propagation.
+  // the solution is simple: we save the timestamp when a handler is attached,
+  // and the handler would only fire if the event passed to it was fired
+  // AFTER it was attached.
+  if (useMicrotaskFix) {
+    const attachedTimestamp = currentFlushTimestamp
+    const original = handler
+    handler = original._wrapper = function (e) {
+      if (
+        // no bubbling, should always fire.
+        // this is just a safety net in case event.timeStamp is unreliable in
+        // certain weird environments...
+        e.target === e.currentTarget ||
+        // event is fired after handler attachment
+        e.timeStamp >= attachedTimestamp ||
+        // bail for environments that have buggy event.timeStamp implementations
+        // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
+        // #9681 QtWebEngine event.timeStamp is negative value
+        e.timeStamp <= 0 ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app, since event.timeStamp will be using a different
+        // starting reference
+        e.target.ownerDocument !== document
+      ) {
+        return original.apply(this, arguments)
+      }
+    }
+  }
   target.addEventListener(
-    event,
+    name,
     handler,
     supportsPassive
       ? { capture, passive }
@@ -57,14 +91,14 @@ function add (
 }
 
 function remove (
-  event: string,
+  name: string,
   handler: Function,
   capture: boolean,
   _target?: HTMLElement
 ) {
   (_target || target).removeEventListener(
-    event,
-    handler._withTask || handler,
+    name,
+    handler._wrapper || handler,
     capture
   )
 }
@@ -75,13 +109,16 @@ function updateDOMListeners (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   }
   const on = vnode.data.on || {}
   const oldOn = oldVnode.data.on || {}
-  target = vnode.elm
+  // vnode is empty when removing all listeners,
+  // and use old vnode dom element
+  target = vnode.elm || oldVnode.elm
   normalizeEvents(on)
-  updateListeners(on, oldOn, add, remove, vnode.context)
+  updateListeners(on, oldOn, add, remove, createOnceHandler, vnode.context)
   target = undefined
 }
 
 export default {
   create: updateDOMListeners,
-  update: updateDOMListeners
+  update: updateDOMListeners,
+  destroy: (vnode: VNodeWithData) => updateDOMListeners(vnode, emptyNode)
 }
diff --git a/src/platforms/web/runtime/modules/style.js b/src/platforms/web/runtime/modules/style.js
index 29e1c3c1e6e..4d2d39dd6ea 100644
--- a/src/platforms/web/runtime/modules/style.js
+++ b/src/platforms/web/runtime/modules/style.js
@@ -1,7 +1,7 @@
 /* @flow */
 
 import { getStyle, normalizeStyleBinding } from 'web/util/style'
-import { cached, camelize, extend, isDef, isUndef } from 'shared/util'
+import { cached, camelize, extend, isDef, isUndef, hyphenate } from 'shared/util'
 
 const cssVarRE = /^--/
 const importantRE = /\s*!important$/
@@ -10,7 +10,7 @@ const setProp = (el, name, val) => {
   if (cssVarRE.test(name)) {
     el.style.setProperty(name, val)
   } else if (importantRE.test(val)) {
-    el.style.setProperty(name, val.replace(importantRE, ''), 'important')
+    el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important')
   } else {
     const normalizedName = normalize(name)
     if (Array.isArray(val)) {
diff --git a/src/platforms/web/runtime/modules/transition.js b/src/platforms/web/runtime/modules/transition.js
index 0796b5dad5e..6117097088d 100644
--- a/src/platforms/web/runtime/modules/transition.js
+++ b/src/platforms/web/runtime/modules/transition.js
@@ -66,8 +66,8 @@ export function enter (vnode: VNodeWithData, toggleDisplay: ?() => void) {
   let context = activeInstance
   let transitionNode = activeInstance.$vnode
   while (transitionNode && transitionNode.parent) {
-    transitionNode = transitionNode.parent
     context = transitionNode.context
+    transitionNode = transitionNode.parent
   }
 
   const isAppear = !context._isMounted || !vnode.isRootInsert
@@ -251,7 +251,7 @@ export function leave (vnode: VNodeWithData, rm: Function) {
       return
     }
     // record leaving element
-    if (!vnode.data.show) {
+    if (!vnode.data.show && el.parentNode) {
       (el.parentNode._pending || (el.parentNode._pending = {}))[(vnode.key: any)] = vnode
     }
     beforeLeave && beforeLeave(el)
diff --git a/src/platforms/web/runtime/node-ops.js b/src/platforms/web/runtime/node-ops.js
index 1516d86bee5..3a2978a75dd 100644
--- a/src/platforms/web/runtime/node-ops.js
+++ b/src/platforms/web/runtime/node-ops.js
@@ -54,6 +54,6 @@ export function setTextContent (node: Node, text: string) {
   node.textContent = text
 }
 
-export function setAttribute (node: Element, key: string, val: string) {
-  node.setAttribute(key, val)
+export function setStyleScope (node: Element, scopeId: string) {
+  node.setAttribute(scopeId, '')
 }
diff --git a/src/platforms/web/runtime/transition-util.js b/src/platforms/web/runtime/transition-util.js
index 47668f0c37d..0885f973f89 100644
--- a/src/platforms/web/runtime/transition-util.js
+++ b/src/platforms/web/runtime/transition-util.js
@@ -122,11 +122,12 @@ export function getTransitionInfo (el: Element, expectedType?: ?string): {
   hasTransform: boolean;
 } {
   const styles: any = window.getComputedStyle(el)
-  const transitionDelays: Array<string> = styles[transitionProp + 'Delay'].split(', ')
-  const transitionDurations: Array<string> = styles[transitionProp + 'Duration'].split(', ')
+  // JSDOM may return undefined for transition properties
+  const transitionDelays: Array<string> = (styles[transitionProp + 'Delay'] || '').split(', ')
+  const transitionDurations: Array<string> = (styles[transitionProp + 'Duration'] || '').split(', ')
   const transitionTimeout: number = getTimeout(transitionDelays, transitionDurations)
-  const animationDelays: Array<string> = styles[animationProp + 'Delay'].split(', ')
-  const animationDurations: Array<string> = styles[animationProp + 'Duration'].split(', ')
+  const animationDelays: Array<string> = (styles[animationProp + 'Delay'] || '').split(', ')
+  const animationDurations: Array<string> = (styles[animationProp + 'Duration'] || '').split(', ')
   const animationTimeout: number = getTimeout(animationDelays, animationDurations)
 
   let type: ?string
@@ -180,6 +181,10 @@ function getTimeout (delays: Array<string>, durations: Array<string>): number {
   }))
 }
 
+// Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
+// in a locale-dependent way, using a comma instead of a dot.
+// If comma is not replaced with a dot, the input will be rounded down (i.e. acting
+// as a floor function) causing unexpected behaviors
 function toMs (s: string): number {
-  return Number(s.slice(0, -1)) * 1000
+  return Number(s.slice(0, -1).replace(',', '.')) * 1000
 }
diff --git a/src/platforms/web/server/directives/show.js b/src/platforms/web/server/directives/show.js
index 5473fb2bd4d..7493b27e087 100644
--- a/src/platforms/web/server/directives/show.js
+++ b/src/platforms/web/server/directives/show.js
@@ -3,6 +3,10 @@
 export default function show (node: VNodeWithData, dir: VNodeDirective) {
   if (!dir.value) {
     const style: any = node.data.style || (node.data.style = {})
-    style.display = 'none'
+    if (Array.isArray(style)) {
+      style.push({ display: 'none' })
+    } else {
+      style.display = 'none'
+    }
   }
 }
diff --git a/src/platforms/web/server/modules/attrs.js b/src/platforms/web/server/modules/attrs.js
index 9e7cc06160b..e575d13ae30 100644
--- a/src/platforms/web/server/modules/attrs.js
+++ b/src/platforms/web/server/modules/attrs.js
@@ -11,9 +11,12 @@ import {
 import {
   isBooleanAttr,
   isEnumeratedAttr,
-  isFalsyAttrValue
+  isFalsyAttrValue,
+  convertEnumeratedValue
 } from 'web/util/attrs'
 
+import { isSSRUnsafeAttr } from 'web/server/util'
+
 export default function renderAttrs (node: VNodeWithData): string {
   let attrs = node.data.attrs
   let res = ''
@@ -22,6 +25,10 @@ export default function renderAttrs (node: VNodeWithData): string {
   if (isUndef(opts) || opts.Ctor.options.inheritAttrs !== false) {
     let parent = node.parent
     while (isDef(parent)) {
+      // Stop fallthrough in case parent has inheritAttrs option set to false
+      if (parent.componentOptions && parent.componentOptions.Ctor.options.inheritAttrs === false) {
+        break;
+      }
       if (isDef(parent.data) && isDef(parent.data.attrs)) {
         attrs = extend(extend({}, attrs), parent.data.attrs)
       }
@@ -34,6 +41,9 @@ export default function renderAttrs (node: VNodeWithData): string {
   }
 
   for (const key in attrs) {
+    if (isSSRUnsafeAttr(key)) {
+      continue
+    }
     if (key === 'style') {
       // leave it to the style module
       continue
@@ -49,7 +59,7 @@ export function renderAttr (key: string, value: string): string {
       return ` ${key}="${key}"`
     }
   } else if (isEnumeratedAttr(key)) {
-    return ` ${key}="${isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true'}"`
+    return ` ${key}="${escape(convertEnumeratedValue(key, value))}"`
   } else if (!isFalsyAttrValue(value)) {
     return ` ${key}="${escape(String(value))}"`
   }
diff --git a/src/platforms/web/server/modules/dom-props.js b/src/platforms/web/server/modules/dom-props.js
index 57c18eefc89..6d92badcb85 100644
--- a/src/platforms/web/server/modules/dom-props.js
+++ b/src/platforms/web/server/modules/dom-props.js
@@ -2,7 +2,7 @@
 
 import VNode from 'core/vdom/vnode'
 import { renderAttr } from './attrs'
-import { isDef, isUndef, extend } from 'shared/util'
+import { isDef, isUndef, extend, toString } from 'shared/util'
 import { propsToAttrMap, isRenderableAttr } from '../util'
 
 export default function renderDOMProps (node: VNodeWithData): string {
@@ -28,7 +28,7 @@ export default function renderDOMProps (node: VNodeWithData): string {
     } else if (key === 'textContent') {
       setText(node, props[key], false)
     } else if (key === 'value' && node.tag === 'textarea') {
-      setText(node, props[key], false)
+      setText(node, toString(props[key]), false)
     } else {
       // $flow-disable-line (WTF?)
       const attr = propsToAttrMap[key] || key.toLowerCase()
diff --git a/src/platforms/web/server/modules/style.js b/src/platforms/web/server/modules/style.js
index fc043ef3409..4c7c2bbbadc 100644
--- a/src/platforms/web/server/modules/style.js
+++ b/src/platforms/web/server/modules/style.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { escape } from '../util'
+import { escape, noUnitNumericStyleProps } from '../util'
 import { hyphenate } from 'shared/util'
 import { getStyle } from 'web/util/style'
 
@@ -11,15 +11,28 @@ export function genStyle (style: Object): string {
     const hyphenatedKey = hyphenate(key)
     if (Array.isArray(value)) {
       for (let i = 0, len = value.length; i < len; i++) {
-        styleText += `${hyphenatedKey}:${value[i]};`
+        styleText += normalizeValue(hyphenatedKey, value[i])
       }
     } else {
-      styleText += `${hyphenatedKey}:${value};`
+      styleText += normalizeValue(hyphenatedKey, value)
     }
   }
   return styleText
 }
 
+function normalizeValue(key: string, value: any): string {
+  if (
+    typeof value === 'string' ||
+    (typeof value === 'number' && noUnitNumericStyleProps[key]) ||
+    value === 0
+  ) {
+    return `${key}:${value};`
+  } else {
+    // invalid values
+    return ``
+  }
+}
+
 export default function renderStyle (vnode: VNodeWithData): ?string {
   const styleText = genStyle(getStyle(vnode, false))
   if (styleText !== '') {
diff --git a/src/platforms/web/server/util.js b/src/platforms/web/server/util.js
index 774686dae6d..9960ec40260 100644
--- a/src/platforms/web/server/util.js
+++ b/src/platforms/web/server/util.js
@@ -5,9 +5,9 @@ import { makeMap } from 'shared/util'
 const isAttr = makeMap(
   'accept,accept-charset,accesskey,action,align,alt,async,autocomplete,' +
   'autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset,' +
-  'checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv,' +
-  'name,contenteditable,contextmenu,controls,coords,data,datetime,default,' +
-  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for,' +
+  'checked,cite,class,code,codebase,color,cols,colspan,content,' +
+  'contenteditable,contextmenu,controls,coords,data,datetime,default,' +
+  'defer,dir,dirname,disabled,download,draggable,dropzone,enctype,for,' +
   'form,formaction,headers,height,hidden,high,href,hreflang,http-equiv,' +
   'icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low,' +
   'manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file,' +
@@ -15,9 +15,14 @@ const isAttr = makeMap(
   'preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox,' +
   'scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span,' +
   'spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex,' +
-  'target,title,type,usemap,value,width,wrap'
+  'target,title,usemap,value,width,wrap'
 )
 
+const unsafeAttrCharRE = /[>/="'\u0009\u000a\u000c\u0020]/ // eslint-disable-line no-control-regex
+export const isSSRUnsafeAttr = (name: string): boolean => {
+  return unsafeAttrCharRE.test(name)
+}
+
 /* istanbul ignore next */
 const isRenderableAttr = (name: string): boolean => {
   return (
@@ -49,3 +54,48 @@ export function escape (s: string) {
 function escapeChar (a) {
   return ESC[a] || a
 }
+
+export const noUnitNumericStyleProps = {
+  "animation-iteration-count": true,
+  "border-image-outset": true,
+  "border-image-slice": true,
+  "border-image-width": true,
+  "box-flex": true,
+  "box-flex-group": true,
+  "box-ordinal-group": true,
+  "column-count": true,
+  "columns": true,
+  "flex": true,
+  "flex-grow": true,
+  "flex-positive": true,
+  "flex-shrink": true,
+  "flex-negative": true,
+  "flex-order": true,
+  "grid-row": true,
+  "grid-row-end": true,
+  "grid-row-span": true,
+  "grid-row-start": true,
+  "grid-column": true,
+  "grid-column-end": true,
+  "grid-column-span": true,
+  "grid-column-start": true,
+  "font-weight": true,
+  "line-clamp": true,
+  "line-height": true,
+  "opacity": true,
+  "order": true,
+  "orphans": true,
+  "tab-size": true,
+  "widows": true,
+  "z-index": true,
+  "zoom": true,
+  // SVG
+  "fill-opacity": true,
+  "flood-opacity": true,
+  "stop-opacity": true,
+  "stroke-dasharray": true,
+  "stroke-dashoffset": true,
+  "stroke-miterlimit": true,
+  "stroke-opacity": true,
+  "stroke-width": true
+}
diff --git a/src/platforms/web/util/attrs.js b/src/platforms/web/util/attrs.js
index 59517da9add..212a99d7296 100644
--- a/src/platforms/web/util/attrs.js
+++ b/src/platforms/web/util/attrs.js
@@ -19,12 +19,23 @@ export const mustUseProp = (tag: string, type: ?string, attr: string): boolean =
 
 export const isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck')
 
+const isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only')
+
+export const convertEnumeratedValue = (key: string, value: any) => {
+  return isFalsyAttrValue(value) || value === 'false'
+    ? 'false'
+    // allow arbitrary string value for contenteditable
+    : key === 'contenteditable' && isValidContentEditableValue(value)
+      ? value
+      : 'true'
+}
+
 export const isBooleanAttr = makeMap(
   'allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' +
   'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' +
   'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' +
   'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' +
-  'required,reversed,scoped,seamless,selected,sortable,translate,' +
+  'required,reversed,scoped,seamless,selected,sortable,' +
   'truespeed,typemustmatch,visible'
 )
 
diff --git a/src/platforms/web/util/element.js b/src/platforms/web/util/element.js
index 65f1aafbbf2..d6a03f49aa5 100644
--- a/src/platforms/web/util/element.js
+++ b/src/platforms/web/util/element.js
@@ -26,7 +26,7 @@ export const isHTMLTag = makeMap(
 // contain child elements.
 export const isSVG = makeMap(
   'svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' +
-  'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
+  'foreignobject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' +
   'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view',
   true
 )
diff --git a/src/platforms/web/util/style.js b/src/platforms/web/util/style.js
index fc119043f99..46e69e4e28f 100644
--- a/src/platforms/web/util/style.js
+++ b/src/platforms/web/util/style.js
@@ -8,7 +8,7 @@ export const parseStyleText = cached(function (cssText) {
   const propertyDelimiter = /:(.+)/
   cssText.split(listDelimiter).forEach(function (item) {
     if (item) {
-      var tmp = item.split(propertyDelimiter)
+      const tmp = item.split(propertyDelimiter)
       tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim())
     }
   })
@@ -69,4 +69,3 @@ export function getStyle (vnode: VNodeWithData, checkChild: boolean): Object {
   }
   return res
 }
-
diff --git a/src/platforms/weex/compiler/directives/model.js b/src/platforms/weex/compiler/directives/model.js
index 6c9b7685ada..6961802d093 100644
--- a/src/platforms/weex/compiler/directives/model.js
+++ b/src/platforms/weex/compiler/directives/model.js
@@ -5,8 +5,7 @@ import { genComponentModel, genAssignmentCode } from 'compiler/directives/model'
 
 export default function model (
   el: ASTElement,
-  dir: ASTDirective,
-  _warn: Function
+  dir: ASTDirective
 ): ?boolean {
   if (el.tag === 'input' || el.tag === 'textarea') {
     genDefaultModel(el, dir.value, dir.modifiers)
diff --git a/src/platforms/weex/compiler/modules/append.js b/src/platforms/weex/compiler/modules/append.js
index 6e7be2674dc..b2c98173b46 100644
--- a/src/platforms/weex/compiler/modules/append.js
+++ b/src/platforms/weex/compiler/modules/append.js
@@ -6,7 +6,7 @@ import { makeMap } from 'shared/util'
 // must be sent to the native together.
 const isUnitaryTag = makeMap('cell,header,cell-slot,recycle-list', true)
 
-function preTransformNode (el: ASTElement, options: CompilerOptions) {
+function preTransformNode (el: ASTElement) {
   if (isUnitaryTag(el.tag) && !el.attrsList.some(item => item.name === 'append')) {
     el.attrsMap.append = 'tree'
     el.attrsList.push({ name: 'append', value: 'tree' })
diff --git a/src/platforms/weex/compiler/modules/class.js b/src/platforms/weex/compiler/modules/class.js
index 371a08ea2f5..05a0182f594 100644
--- a/src/platforms/weex/compiler/modules/class.js
+++ b/src/platforms/weex/compiler/modules/class.js
@@ -20,7 +20,8 @@ function transformNode (el: ASTElement, options: CompilerOptions) {
     warn(
       `class="${staticClass}": ` +
       'Interpolation inside attributes has been deprecated. ' +
-      'Use v-bind or the colon shorthand instead.'
+      'Use v-bind or the colon shorthand instead.',
+      el.rawAttrsMap['class']
     )
   }
   if (!dynamic && classResult) {
diff --git a/src/platforms/weex/compiler/modules/props.js b/src/platforms/weex/compiler/modules/props.js
index 8b0bb5f2e69..f7e21fe3b41 100644
--- a/src/platforms/weex/compiler/modules/props.js
+++ b/src/platforms/weex/compiler/modules/props.js
@@ -13,7 +13,7 @@ function normalizeKeyName (str: string): string {
   return normalize(str)
 }
 
-function transformNode (el: ASTElement, options: CompilerOptions) {
+function transformNode (el: ASTElement) {
   if (Array.isArray(el.attrsList)) {
     el.attrsList.forEach(attr => {
       if (attr.name && attr.name.match(/\-/)) {
@@ -22,6 +22,11 @@ function transformNode (el: ASTElement, options: CompilerOptions) {
           el.attrsMap[realName] = el.attrsMap[attr.name]
           delete el.attrsMap[attr.name]
         }
+        if (el.rawAttrsMap && el.rawAttrsMap[attr.name]) {
+          el.rawAttrsMap[realName] = el.rawAttrsMap[attr.name]
+          // $flow-disable-line
+          delete el.rawAttrsMap[attr.name]
+        }
         attr.name = realName
       }
     })
diff --git a/src/platforms/weex/compiler/modules/recycle-list/component-root.js b/src/platforms/weex/compiler/modules/recycle-list/component-root.js
index 48abb622fd1..5138799fb6b 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/component-root.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/component-root.js
@@ -3,13 +3,11 @@
 import { addAttr } from 'compiler/helpers'
 
 // mark component root nodes as
-export function postTransformComponentRoot (
-  el: ASTElement,
-  options: WeexCompilerOptions
-) {
+export function postTransformComponentRoot (el: ASTElement) {
   if (!el.parent) {
     // component root
     addAttr(el, '@isComponentRoot', 'true')
+    addAttr(el, '@templateId', '_uid')
     addAttr(el, '@componentProps', '$props || {}')
   }
 }
diff --git a/src/platforms/weex/compiler/modules/recycle-list/index.js b/src/platforms/weex/compiler/modules/recycle-list/index.js
index 1b85a45f993..e75b1746e4a 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/index.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/index.js
@@ -8,6 +8,7 @@ import { preTransformVBind } from './v-bind'
 import { preTransformVIf } from './v-if'
 import { preTransformVFor } from './v-for'
 import { postTransformVOn } from './v-on'
+import { preTransformVOnce } from './v-once'
 
 let currentRecycleList = null
 
@@ -22,9 +23,10 @@ function preTransformNode (el: ASTElement, options: WeexCompilerOptions) {
     currentRecycleList = el
   }
   if (shouldCompile(el, options)) {
-    preTransformVBind(el, options)
+    preTransformVBind(el)
     preTransformVIf(el, options) // also v-else-if and v-else
     preTransformVFor(el, options)
+    preTransformVOnce(el)
   }
 }
 
@@ -39,12 +41,12 @@ function postTransformNode (el: ASTElement, options: WeexCompilerOptions) {
     // mark child component in parent template
     postTransformComponent(el, options)
     // mark root in child component template
-    postTransformComponentRoot(el, options)
+    postTransformComponentRoot(el)
     // <text>: transform children text into value attr
     if (el.tag === 'text') {
-      postTransformText(el, options)
+      postTransformText(el)
     }
-    postTransformVOn(el, options)
+    postTransformVOn(el)
   }
   if (el === currentRecycleList) {
     currentRecycleList = null
diff --git a/src/platforms/weex/compiler/modules/recycle-list/recycle-list.js b/src/platforms/weex/compiler/modules/recycle-list/recycle-list.js
index 22e3b5d5525..7fb65167536 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/recycle-list.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/recycle-list.js
@@ -33,6 +33,7 @@ export function preTransformRecycleList (
   }
 
   addRawAttr(el, ':list-data', res.for)
+  addRawAttr(el, 'binding-expression', res.for)
   addRawAttr(el, 'alias', res.alias)
   if (res.iterator2) {
     // (item, key, index) for object iteration
diff --git a/src/platforms/weex/compiler/modules/recycle-list/text.js b/src/platforms/weex/compiler/modules/recycle-list/text.js
index 575ec7f6cea..b3cbd06fb31 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/text.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/text.js
@@ -13,7 +13,7 @@ function genText (node: ASTNode) {
   return JSON.stringify(value)
 }
 
-export function postTransformText (el: ASTElement, options: WeexCompilerOptions) {
+export function postTransformText (el: ASTElement) {
   // weex <text> can only contain text, so the parser
   // always generates a single child.
   if (el.children.length) {
diff --git a/src/platforms/weex/compiler/modules/recycle-list/v-bind.js b/src/platforms/weex/compiler/modules/recycle-list/v-bind.js
index effdf351126..14f0f687dab 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/v-bind.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/v-bind.js
@@ -9,7 +9,7 @@ function parseAttrName (name: string): string {
   return camelize(name.replace(bindRE, ''))
 }
 
-export function preTransformVBind (el: ASTElement, options: WeexCompilerOptions) {
+export function preTransformVBind (el: ASTElement) {
   for (const attr in el.attrsMap) {
     if (bindRE.test(attr)) {
       const name: string = parseAttrName(attr)
diff --git a/src/platforms/weex/compiler/modules/recycle-list/v-if.js b/src/platforms/weex/compiler/modules/recycle-list/v-if.js
index 3715cfea1f3..d82ba632b1e 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/v-if.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/v-if.js
@@ -1,5 +1,6 @@
 /* @flow */
 
+import { addIfCondition } from 'compiler/parser/index'
 import { getAndRemoveAttr, addRawAttr } from 'compiler/helpers'
 
 function hasConditionDirective (el: ASTElement): boolean {
@@ -11,11 +12,23 @@ function hasConditionDirective (el: ASTElement): boolean {
   return false
 }
 
-function getPrevMatch (el: ASTElement): any {
+function getPreviousConditions (el: ASTElement): Array<string> {
+  const conditions = []
   if (el.parent && el.parent.children) {
-    const prev: Object = el.parent.children[el.parent.children.length - 1]
-    return prev.attrsMap['[[match]]']
+    for (let c = 0, n = el.parent.children.length; c < n; ++c) {
+      // $flow-disable-line
+      const ifConditions = el.parent.children[c].ifConditions
+      if (ifConditions) {
+        for (let i = 0, l = ifConditions.length; i < l; ++i) {
+          const condition = ifConditions[i]
+          if (condition && condition.exp) {
+            conditions.push(condition.exp)
+          }
+        }
+      }
+    }
   }
+  return conditions
 }
 
 export function preTransformVIf (el: ASTElement, options: WeexCompilerOptions) {
@@ -28,9 +41,12 @@ export function preTransformVIf (el: ASTElement, options: WeexCompilerOptions) {
     getAndRemoveAttr(el, 'v-else', true)
     if (ifExp) {
       exp = ifExp
+      addIfCondition(el, { exp: ifExp, block: el })
     } else {
-      const prevMatch = getPrevMatch(el)
-      if (prevMatch) {
+      elseifExp && addIfCondition(el, { exp: elseifExp, block: el })
+      const prevConditions = getPreviousConditions(el)
+      if (prevConditions.length) {
+        const prevMatch = prevConditions.join(' || ')
         exp = elseifExp
           ? `!(${prevMatch}) && (${elseifExp})` // v-else-if
           : `!(${prevMatch})` // v-else
diff --git a/src/platforms/weex/compiler/modules/recycle-list/v-on.js b/src/platforms/weex/compiler/modules/recycle-list/v-on.js
index b1ba262c025..aed3ea75531 100644
--- a/src/platforms/weex/compiler/modules/recycle-list/v-on.js
+++ b/src/platforms/weex/compiler/modules/recycle-list/v-on.js
@@ -9,7 +9,7 @@ function parseHandlerParams (handler: ASTElementHandler) {
   }
 }
 
-export function postTransformVOn (el: ASTElement, options: WeexCompilerOptions) {
+export function postTransformVOn (el: ASTElement) {
   const events: ASTElementHandlers | void = el.events
   if (!events) {
     return
diff --git a/src/platforms/weex/compiler/modules/recycle-list/v-once.js b/src/platforms/weex/compiler/modules/recycle-list/v-once.js
new file mode 100644
index 00000000000..99380c7f481
--- /dev/null
+++ b/src/platforms/weex/compiler/modules/recycle-list/v-once.js
@@ -0,0 +1,19 @@
+/* @flow */
+
+import { getAndRemoveAttr, addRawAttr } from 'compiler/helpers'
+
+function containVOnce (el: ASTElement): boolean {
+  for (const attr in el.attrsMap) {
+    if (/^v\-once$/i.test(attr)) {
+      return true
+    }
+  }
+  return false
+}
+
+export function preTransformVOnce (el: ASTElement) {
+  if (containVOnce(el)) {
+    getAndRemoveAttr(el, 'v-once', true)
+    addRawAttr(el, '[[once]]', true)
+  }
+}
diff --git a/src/platforms/weex/compiler/modules/style.js b/src/platforms/weex/compiler/modules/style.js
index 7bf5027fa39..9b0cd446d15 100644
--- a/src/platforms/weex/compiler/modules/style.js
+++ b/src/platforms/weex/compiler/modules/style.js
@@ -23,7 +23,8 @@ function transformNode (el: ASTElement, options: CompilerOptions) {
     warn(
       `style="${String(staticStyle)}": ` +
       'Interpolation inside attributes has been deprecated. ' +
-      'Use v-bind or the colon shorthand instead.'
+      'Use v-bind or the colon shorthand instead.',
+      el.rawAttrsMap['style']
     )
   }
   if (!dynamic && styleResult) {
diff --git a/src/platforms/weex/entry-compiler.js b/src/platforms/weex/entry-compiler.js
index 18d79ab742f..b8f3f8ffcfb 100644
--- a/src/platforms/weex/entry-compiler.js
+++ b/src/platforms/weex/entry-compiler.js
@@ -1 +1,2 @@
 export { compile } from 'weex/compiler/index'
+export { generateCodeFrame } from 'compiler/codeframe'
diff --git a/src/platforms/weex/entry-framework.js b/src/platforms/weex/entry-framework.js
index a23775d4db5..60c43373428 100644
--- a/src/platforms/weex/entry-framework.js
+++ b/src/platforms/weex/entry-framework.js
@@ -22,7 +22,7 @@ export function createInstanceContext (
     data
   }
 
-  // Each instance has a independent `Vue` module instance
+  // Each instance has an independent `Vue` module instance
   const Vue = instance.Vue = createVueModuleInstance(instanceId, weex)
 
   // DEPRECATED
diff --git a/src/platforms/weex/runtime/modules/class.js b/src/platforms/weex/runtime/modules/class.js
index 8d9d51ec603..0a07bb3b56d 100755
--- a/src/platforms/weex/runtime/modules/class.js
+++ b/src/platforms/weex/runtime/modules/class.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { extend } from 'shared/util'
+import { extend, isObject } from 'shared/util'
 
 function updateClass (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   const el = vnode.elm
@@ -15,34 +15,39 @@ function updateClass (oldVnode: VNodeWithData, vnode: VNodeWithData) {
     return
   }
 
-  const oldClassList = []
-  // unlike web, weex vnode staticClass is an Array
-  const oldStaticClass: any = oldData.staticClass
-  if (oldStaticClass) {
-    oldClassList.push.apply(oldClassList, oldStaticClass)
-  }
-  if (oldData.class) {
-    oldClassList.push.apply(oldClassList, oldData.class)
+  const oldClassList = makeClassList(oldData)
+  const classList = makeClassList(data)
+
+  if (typeof el.setClassList === 'function') {
+    el.setClassList(classList)
+  } else {
+    const style = getStyle(oldClassList, classList, ctx)
+    if (typeof el.setStyles === 'function') {
+      el.setStyles(style)
+    } else {
+      for (const key in style) {
+        el.setStyle(key, style[key])
+      }
+    }
   }
+}
 
+function makeClassList (data: VNodeData): Array<string> {
   const classList = []
   // unlike web, weex vnode staticClass is an Array
   const staticClass: any = data.staticClass
+  const dataClass = data.class
   if (staticClass) {
     classList.push.apply(classList, staticClass)
   }
-  if (data.class) {
-    classList.push.apply(classList, data.class)
-  }
-
-  const style = getStyle(oldClassList, classList, ctx)
-  if (typeof el.setStyles === 'function') {
-    el.setStyles(style)
-  } else {
-    for (const key in style) {
-      el.setStyle(key, style[key])
-    }
+  if (Array.isArray(dataClass)) {
+    classList.push.apply(classList, dataClass)
+  } else if (isObject(dataClass)) {
+    classList.push.apply(classList, Object.keys(dataClass).filter(className => dataClass[className]))
+  } else if (typeof dataClass === 'string') {
+    classList.push.apply(classList, dataClass.trim().split(/\s+/))
   }
+  return classList
 }
 
 function getStyle (oldClassList: Array<string>, classList: Array<string>, ctx: Component): Object {
diff --git a/src/platforms/weex/runtime/modules/events.js b/src/platforms/weex/runtime/modules/events.js
index a3f9e25a0ac..c34719483a8 100755
--- a/src/platforms/weex/runtime/modules/events.js
+++ b/src/platforms/weex/runtime/modules/events.js
@@ -4,10 +4,19 @@ import { updateListeners } from 'core/vdom/helpers/update-listeners'
 
 let target: any
 
+function createOnceHandler (event, handler, capture) {
+  const _target = target // save current target element in closure
+  return function onceHandler () {
+    const res = handler.apply(null, arguments)
+    if (res !== null) {
+      remove(event, onceHandler, capture, _target)
+    }
+  }
+}
+
 function add (
   event: string,
   handler: Function,
-  once: boolean,
   capture: boolean,
   passive?: boolean,
   params?: Array<any>
@@ -16,18 +25,6 @@ function add (
     console.log('Weex do not support event in bubble phase.')
     return
   }
-  if (once) {
-    const oldHandler = handler
-    const _target = target // save current target element in closure
-    handler = function (ev) {
-      const res = arguments.length === 1
-        ? oldHandler(ev)
-        : oldHandler.apply(null, arguments)
-      if (res !== null) {
-        remove(event, null, null, _target)
-      }
-    }
-  }
   target.addEvent(event, handler, params)
 }
 
@@ -47,7 +44,7 @@ function updateDOMListeners (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   const on = vnode.data.on || {}
   const oldOn = oldVnode.data.on || {}
   target = vnode.elm
-  updateListeners(on, oldOn, add, remove, vnode.context)
+  updateListeners(on, oldOn, add, remove, createOnceHandler, vnode.context)
   target = undefined
 }
 
diff --git a/src/platforms/weex/runtime/modules/style.js b/src/platforms/weex/runtime/modules/style.js
index bdabd17b7a9..0ec217b3743 100755
--- a/src/platforms/weex/runtime/modules/style.js
+++ b/src/platforms/weex/runtime/modules/style.js
@@ -70,7 +70,7 @@ function updateStyle (oldVnode: VNodeWithData, vnode: VNodeWithData) {
 
 function toObject (arr) {
   const res = {}
-  for (var i = 0; i < arr.length; i++) {
+  for (let i = 0; i < arr.length; i++) {
     if (arr[i]) {
       extend(res, arr[i])
     }
diff --git a/src/platforms/weex/runtime/modules/transition.js b/src/platforms/weex/runtime/modules/transition.js
index e474c2b3e9b..cf872819f31 100644
--- a/src/platforms/weex/runtime/modules/transition.js
+++ b/src/platforms/weex/runtime/modules/transition.js
@@ -75,7 +75,7 @@ function enter (_, vnode) {
   const stylesheet = vnode.context.$options.style || {}
   const startState = stylesheet[startClass]
   const transitionProperties = (stylesheet['@TRANSITION'] && stylesheet['@TRANSITION'][activeClass]) || {}
-  const endState = getEnterTargetState(el, stylesheet, startClass, toClass, activeClass, vnode.context)
+  const endState = getEnterTargetState(el, stylesheet, startClass, toClass, activeClass)
   const needAnimation = Object.keys(endState).length > 0
 
   const cb = el._enterCb = once(() => {
@@ -229,7 +229,7 @@ function leave (vnode, rm) {
 }
 
 // determine the target animation style for an entering transition.
-function getEnterTargetState (el, stylesheet, startClass, endClass, activeClass, vm) {
+function getEnterTargetState (el, stylesheet, startClass, endClass, activeClass) {
   const targetState = {}
   const startState = stylesheet[startClass]
   const endState = stylesheet[endClass]
diff --git a/src/platforms/weex/runtime/node-ops.js b/src/platforms/weex/runtime/node-ops.js
index 0431f7c6d64..0438ec5c150 100755
--- a/src/platforms/weex/runtime/node-ops.js
+++ b/src/platforms/weex/runtime/node-ops.js
@@ -85,3 +85,7 @@ export function setTextContent (node: WeexElement, text: string) {
 export function setAttribute (node: WeexElement, key: string, val: any) {
   node.setAttr(key, val)
 }
+
+export function setStyleScope (node: WeexElement, scopeId: string) {
+  node.setAttr('@styleScope', scopeId)
+}
diff --git a/src/platforms/weex/util/element.js b/src/platforms/weex/util/element.js
index 97e97febbe5..9753918597b 100644
--- a/src/platforms/weex/util/element.js
+++ b/src/platforms/weex/util/element.js
@@ -4,7 +4,7 @@
 // makeMap() due to potential side effects, so these variables end up
 // bloating the web builds.
 
-import { makeMap } from 'shared/util'
+import { makeMap, noop } from 'shared/util'
 
 export const isReservedTag = makeMap(
   'template,script,style,element,content,slot,link,meta,svg,view,' +
@@ -33,20 +33,20 @@ export const isUnaryTag = makeMap(
   true
 )
 
-export function mustUseProp (tag: string, type: ?string, name: string): boolean {
+export function mustUseProp (): boolean {
   return false
 }
 
-export function getTagNamespace (tag?: string): string | void { }
+export function getTagNamespace (): void { }
 
-export function isUnknownElement (tag?: string): boolean {
+export function isUnknownElement (): boolean {
   return false
 }
 
 export function query (el: string | Element, document: Object) {
   // document is injected by weex factory wrapper
   const placeholder = document.createComment('root')
-  placeholder.hasAttribute = placeholder.removeAttribute = function () {} // hack for patch
+  placeholder.hasAttribute = placeholder.removeAttribute = noop // hack for patch
   document.documentElement.appendChild(placeholder)
   return placeholder
 }
diff --git a/src/server/create-renderer.js b/src/server/create-renderer.js
index c045a426fe6..502b6fa6d1d 100644
--- a/src/server/create-renderer.js
+++ b/src/server/create-renderer.js
@@ -23,12 +23,13 @@ export type RenderOptions = {
   directives?: Object;
   isUnaryTag?: Function;
   cache?: RenderCache;
-  template?: string;
+  template?: string | (content: string, context: any) => string;
   inject?: boolean;
   basedir?: string;
   shouldPreload?: Function;
   shouldPrefetch?: Function;
   clientManifest?: ClientManifest;
+  serializer?: Function;
   runInNewContext?: boolean | 'once';
 };
 
@@ -41,7 +42,8 @@ export function createRenderer ({
   cache,
   shouldPreload,
   shouldPrefetch,
-  clientManifest
+  clientManifest,
+  serializer
 }: RenderOptions = {}): Renderer {
   const render = createRenderFunction(modules, directives, isUnaryTag, cache)
   const templateRenderer = new TemplateRenderer({
@@ -49,7 +51,8 @@ export function createRenderer ({
     inject,
     shouldPreload,
     shouldPrefetch,
-    clientManifest
+    clientManifest,
+    serializer
   })
 
   return {
@@ -79,11 +82,26 @@ export function createRenderer ({
       }, cb)
       try {
         render(component, write, context, err => {
-          if (template) {
-            result = templateRenderer.renderSync(result, context)
-          }
           if (err) {
-            cb(err)
+            return cb(err)
+          }
+          if (context && context.rendered) {
+            context.rendered(context)
+          }
+          if (template) {
+            try {
+              const res = templateRenderer.render(result, context)
+              if (typeof res !== 'string') {
+                // function template returning promise
+                res
+                  .then(html => cb(null, html))
+                  .catch(cb)
+              } else {
+                cb(null, res)
+              }
+            } catch (e) {
+              cb(e)
+            }
           } else {
             cb(null, result)
           }
@@ -106,13 +124,27 @@ export function createRenderer ({
         render(component, write, context, done)
       })
       if (!template) {
+        if (context && context.rendered) {
+          const rendered = context.rendered
+          renderStream.once('beforeEnd', () => {
+            rendered(context)
+          })
+        }
         return renderStream
+      } else if (typeof template === 'function') {
+        throw new Error(`function template is only supported in renderToString.`)
       } else {
         const templateStream = templateRenderer.createStream(context)
         renderStream.on('error', err => {
           templateStream.emit('error', err)
         })
         renderStream.pipe(templateStream)
+        if (context && context.rendered) {
+          const rendered = context.rendered
+          renderStream.once('beforeEnd', () => {
+            rendered(context)
+          })
+        }
         return templateStream
       }
     }
diff --git a/src/server/optimizing-compiler/codegen.js b/src/server/optimizing-compiler/codegen.js
index 26097c07b48..9399761383a 100644
--- a/src/server/optimizing-compiler/codegen.js
+++ b/src/server/optimizing-compiler/codegen.js
@@ -225,7 +225,11 @@ function nodesToSegments (
     } else if (c.type === 2) {
       segments.push({ type: INTERPOLATION, value: c.expression })
     } else if (c.type === 3) {
-      segments.push({ type: RAW, value: escape(c.text) })
+      let text = escape(c.text)
+      if (c.isComment) {
+        text = '<!--' + text + '-->'
+      }
+      segments.push({ type: RAW, value: text })
     }
   }
   return segments
diff --git a/src/server/optimizing-compiler/modules.js b/src/server/optimizing-compiler/modules.js
index 69a7be87390..a1dcfe5e293 100644
--- a/src/server/optimizing-compiler/modules.js
+++ b/src/server/optimizing-compiler/modules.js
@@ -19,8 +19,6 @@ import {
 import type { StringSegment } from './codegen'
 import type { CodegenState } from 'compiler/codegen/index'
 
-type Attr = { name: string; value: string };
-
 const plainStringRE = /^"(?:[^"\\]|\\.)*"$|^'(?:[^'\\]|\\.)*'$/
 
 // let the model AST transform translate v-model into appropriate
@@ -42,14 +40,14 @@ export function applyModelTransform (el: ASTElement, state: CodegenState) {
 }
 
 export function genAttrSegments (
-  attrs: Array<Attr>
+  attrs: Array<ASTAttr>
 ): Array<StringSegment> {
   return attrs.map(({ name, value }) => genAttrSegment(name, value))
 }
 
 export function genDOMPropSegments (
-  props: Array<Attr>,
-  attrs: ?Array<Attr>
+  props: Array<ASTAttr>,
+  attrs: ?Array<ASTAttr>
 ): Array<StringSegment> {
   const segments = []
   props.forEach(({ name, value }) => {
@@ -92,7 +90,7 @@ export function genClassSegments (
   classBinding: ?string
 ): Array<StringSegment> {
   if (staticClass && !classBinding) {
-    return [{ type: RAW, value: ` class=${staticClass}` }]
+    return [{ type: RAW, value: ` class="${JSON.parse(staticClass)}"` }]
   } else {
     return [{
       type: EXPRESSION,
diff --git a/src/server/optimizing-compiler/optimizer.js b/src/server/optimizing-compiler/optimizer.js
index d24acc5526a..d89cbd0a451 100644
--- a/src/server/optimizing-compiler/optimizer.js
+++ b/src/server/optimizing-compiler/optimizer.js
@@ -84,6 +84,7 @@ function optimizeSiblings (el) {
         tag: 'template',
         attrsList: [],
         attrsMap: {},
+        rawAttrsMap: {},
         children: currentOptimizableGroup,
         ssrOptimizability: optimizability.FULL
       })
diff --git a/src/server/optimizing-compiler/runtime-helpers.js b/src/server/optimizing-compiler/runtime-helpers.js
index b4f7c1f145d..6f65de04e59 100644
--- a/src/server/optimizing-compiler/runtime-helpers.js
+++ b/src/server/optimizing-compiler/runtime-helpers.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { escape } from 'web/server/util'
+import { escape, isSSRUnsafeAttr } from 'web/server/util'
 import { isObject, extend } from 'shared/util'
 import { renderAttr } from 'web/server/modules/attrs'
 import { renderClass } from 'web/util/class'
@@ -17,22 +17,29 @@ import {
   isRenderableAttr
 } from 'web/server/util'
 
+const ssrHelpers = {
+  _ssrEscape: escape,
+  _ssrNode: renderStringNode,
+  _ssrList: renderStringList,
+  _ssrAttr: renderAttr,
+  _ssrAttrs: renderAttrs,
+  _ssrDOMProps: renderDOMProps,
+  _ssrClass: renderSSRClass,
+  _ssrStyle: renderSSRStyle
+}
+
 export function installSSRHelpers (vm: Component) {
-  if (vm._ssrNode) return
-  let Ctor = vm.constructor
-  while (Ctor.super) {
-    Ctor = Ctor.super
+  if (vm._ssrNode) {
+    return
+  }
+  let Vue = vm.constructor
+  while (Vue.super) {
+    Vue = Vue.super
+  }
+  extend(Vue.prototype, ssrHelpers)
+  if (Vue.FunctionalRenderContext) {
+    extend(Vue.FunctionalRenderContext.prototype, ssrHelpers)
   }
-  extend(Ctor.prototype, {
-    _ssrEscape: escape,
-    _ssrNode: renderStringNode,
-    _ssrList: renderStringList,
-    _ssrAttr: renderAttr,
-    _ssrAttrs: renderAttrs,
-    _ssrDOMProps: renderDOMProps,
-    _ssrClass: renderSSRClass,
-    _ssrStyle: renderSSRStyle
-  })
 }
 
 class StringNode {
@@ -102,6 +109,9 @@ function renderStringList (
 function renderAttrs (obj: Object): string {
   let res = ''
   for (const key in obj) {
+    if (isSSRUnsafeAttr(key)) {
+      continue
+    }
     res += renderAttr(key, obj[key])
   }
   return res
diff --git a/src/server/render-context.js b/src/server/render-context.js
index cecb00157d7..3da91d0abca 100644
--- a/src/server/render-context.js
+++ b/src/server/render-context.js
@@ -6,7 +6,12 @@ type RenderState = {
   type: 'Element';
   rendered: number;
   total: number;
+  children: Array<VNode>;
   endTag: string;
+} | {
+  type: 'Fragment';
+  rendered: number;
+  total: number;
   children: Array<VNode>;
 } | {
   type: 'Component';
@@ -61,49 +66,54 @@ export class RenderContext {
   }
 
   next () {
-    const lastState = this.renderStates[this.renderStates.length - 1]
-    if (isUndef(lastState)) {
-      return this.done()
-    }
-    switch (lastState.type) {
-      case 'Element':
-        const { children, total } = lastState
-        const rendered = lastState.rendered++
-        if (rendered < total) {
-          this.renderNode(children[rendered], false, this)
-        } else {
+    // eslint-disable-next-line
+    while (true) {
+      const lastState = this.renderStates[this.renderStates.length - 1]
+      if (isUndef(lastState)) {
+        return this.done()
+      }
+      /* eslint-disable no-case-declarations */
+      switch (lastState.type) {
+        case 'Element':
+        case 'Fragment':
+          const { children, total } = lastState
+          const rendered = lastState.rendered++
+          if (rendered < total) {
+            return this.renderNode(children[rendered], false, this)
+          } else {
+            this.renderStates.pop()
+            if (lastState.type === 'Element') {
+              return this.write(lastState.endTag, this.next)
+            }
+          }
+          break
+        case 'Component':
+          this.renderStates.pop()
+          this.activeInstance = lastState.prevActive
+          break
+        case 'ComponentWithCache':
           this.renderStates.pop()
-          this.write(lastState.endTag, this.next)
-        }
-        break
-      case 'Component':
-        this.renderStates.pop()
-        this.activeInstance = lastState.prevActive
-        this.next()
-        break
-      case 'ComponentWithCache':
-        this.renderStates.pop()
-        const { buffer, bufferIndex, componentBuffer, key } = lastState
-        const result = {
-          html: buffer[bufferIndex],
-          components: componentBuffer[bufferIndex]
-        }
-        this.cache.set(key, result)
-        if (bufferIndex === 0) {
-          // this is a top-level cached component,
-          // exit caching mode.
-          this.write.caching = false
-        } else {
-          // parent component is also being cached,
-          // merge self into parent's result
-          buffer[bufferIndex - 1] += result.html
-          const prev = componentBuffer[bufferIndex - 1]
-          result.components.forEach(c => prev.add(c))
-        }
-        buffer.length = bufferIndex
-        componentBuffer.length = bufferIndex
-        this.next()
-        break
+          const { buffer, bufferIndex, componentBuffer, key } = lastState
+          const result = {
+            html: buffer[bufferIndex],
+            components: componentBuffer[bufferIndex]
+          }
+          this.cache.set(key, result)
+          if (bufferIndex === 0) {
+            // this is a top-level cached component,
+            // exit caching mode.
+            this.write.caching = false
+          } else {
+            // parent component is also being cached,
+            // merge self into parent's result
+            buffer[bufferIndex - 1] += result.html
+            const prev = componentBuffer[bufferIndex - 1]
+            result.components.forEach(c => prev.add(c))
+          }
+          buffer.length = bufferIndex
+          componentBuffer.length = bufferIndex
+          break
+      }
     }
   }
 }
diff --git a/src/server/render-stream.js b/src/server/render-stream.js
index d76012afb5b..bc358e20e95 100644
--- a/src/server/render-stream.js
+++ b/src/server/render-stream.js
@@ -42,6 +42,7 @@ export default class RenderStream extends stream.Readable {
     })
 
     this.end = () => {
+      this.emit('beforeEnd')
       // the rendering is finished; we should push out the last of the buffer.
       this.done = true
       this.push(this.buffer)
diff --git a/src/server/render.js b/src/server/render.js
index 150afce077d..05ba588006d 100644
--- a/src/server/render.js
+++ b/src/server/render.js
@@ -3,6 +3,7 @@
 import { escape } from 'web/server/util'
 import { SSR_ATTR } from 'shared/constants'
 import { RenderContext } from './render-context'
+import { resolveAsset } from 'core/util/options'
 import { generateComponentTrace } from 'core/util/debug'
 import { ssrCompileToFunctions } from 'web/server/compiler'
 import { installSSRHelpers } from './optimizing-compiler/runtime-helpers'
@@ -18,6 +19,7 @@ let warned = Object.create(null)
 const warnOnce = msg => {
   if (!warned[msg]) {
     warned[msg] = true
+    // eslint-disable-next-line no-console
     console.warn(`\n\u001b[31m${msg}\u001b[39m\n`)
   }
 }
@@ -48,6 +50,27 @@ const normalizeRender = vm => {
   }
 }
 
+function waitForServerPrefetch (vm, resolve, reject) {
+  let handlers = vm.$options.serverPrefetch
+  if (isDef(handlers)) {
+    if (!Array.isArray(handlers)) handlers = [handlers]
+    try {
+      const promises = []
+      for (let i = 0, j = handlers.length; i < j; i++) {
+        const result = handlers[i].call(vm, vm)
+        if (result && typeof result.then === 'function') {
+          promises.push(result)
+        }
+      }
+      Promise.all(promises).then(resolve).catch(reject)
+      return
+    } catch (e) {
+      reject(e)
+    }
+  }
+  resolve()
+}
+
 function renderNode (node, isRoot, context) {
   if (node.isString) {
     renderStringNode(node, context)
@@ -91,7 +114,12 @@ function renderComponent (node, isRoot, context) {
   const registerComponent = registerComponentForCache(Ctor.options, write)
 
   if (isDef(getKey) && isDef(cache) && isDef(name)) {
-    const key = name + '::' + getKey(node.componentOptions.propsData)
+    const rawKey = getKey(node.componentOptions.propsData)
+    if (rawKey === false) {
+      renderComponentInner(node, isRoot, context)
+      return
+    }
+    const key = name + '::' + rawKey
     const { has, get } = context
     if (isDef(has)) {
       has(key, hit => {
@@ -165,13 +193,20 @@ function renderComponentInner (node, isRoot, context) {
     context.activeInstance
   )
   normalizeRender(child)
-  const childNode = child._render()
-  childNode.parent = node
-  context.renderStates.push({
-    type: 'Component',
-    prevActive
-  })
-  renderNode(childNode, isRoot, context)
+
+  const resolve = () => {
+    const childNode = child._render()
+    childNode.parent = node
+    context.renderStates.push({
+      type: 'Component',
+      prevActive
+    })
+    renderNode(childNode, isRoot, context)
+  }
+
+  const reject = context.done
+
+  waitForServerPrefetch(child, resolve, reject)
 }
 
 function renderAsyncComponent (node, isRoot, context) {
@@ -191,7 +226,22 @@ function renderAsyncComponent (node, isRoot, context) {
       tag
     )
     if (resolvedNode) {
-      renderComponent(resolvedNode, isRoot, context)
+      if (resolvedNode.componentOptions) {
+        // normal component
+        renderComponent(resolvedNode, isRoot, context)
+      } else if (!Array.isArray(resolvedNode)) {
+        // single return node from functional component
+        renderNode(resolvedNode, isRoot, context)
+      } else {
+        // multiple return nodes from functional component
+        context.renderStates.push({
+          type: 'Fragment',
+          children: resolvedNode,
+          rendered: 0,
+          total: resolvedNode.length
+        })
+        context.next()
+      }
     } else {
       // invalid component, but this does not throw on the client
       // so render empty comment node
@@ -232,9 +282,10 @@ function renderStringNode (el, context) {
     const children: Array<VNode> = el.children
     context.renderStates.push({
       type: 'Element',
+      children,
       rendered: 0,
       total: children.length,
-      endTag: el.close, children
+      endTag: el.close
     })
     write(el.open, next)
   }
@@ -263,9 +314,10 @@ function renderElement (el, isRoot, context) {
     const children: Array<VNode> = el.children
     context.renderStates.push({
       type: 'Element',
+      children,
       rendered: 0,
       total: children.length,
-      endTag, children
+      endTag
     })
     write(startTag, next)
   }
@@ -307,11 +359,13 @@ function renderStartingTag (node: VNode, context) {
     if (dirs) {
       for (let i = 0; i < dirs.length; i++) {
         const name = dirs[i].name
-        const dirRenderer = directives[name]
-        if (dirRenderer && name !== 'show') {
-          // directives mutate the node's data
-          // which then gets rendered by modules
-          dirRenderer(node, dirs[i])
+        if (name !== 'show') {
+          const dirRenderer = resolveAsset(context, 'directives', name)
+          if (dirRenderer) {
+            // directives mutate the node's data
+            // which then gets rendered by modules
+            dirRenderer(node, dirs[i])
+          }
         }
       }
     }
@@ -374,6 +428,10 @@ export function createRenderFunction (
     })
     installSSRHelpers(component)
     normalizeRender(component)
-    renderNode(component._render(), true, context)
+
+    const resolve = () => {
+      renderNode(component._render(), true, context)
+    }
+    waitForServerPrefetch(component, resolve, done)
   }
 }
diff --git a/src/server/template-renderer/create-async-file-mapper.js b/src/server/template-renderer/create-async-file-mapper.js
index 64c0647a3ed..057fa9083ee 100644
--- a/src/server/template-renderer/create-async-file-mapper.js
+++ b/src/server/template-renderer/create-async-file-mapper.js
@@ -43,8 +43,12 @@ function mapIdToFile (id, clientManifest) {
   if (fileIndices) {
     fileIndices.forEach(index => {
       const file = clientManifest.all[index]
-      // only include async files or non-js assets
-      if (clientManifest.async.indexOf(file) > -1 || !(/\.js($|\?)/.test(file))) {
+      // only include async files or non-js, non-css assets
+      if (
+        file &&
+        (clientManifest.async.indexOf(file) > -1 ||
+          !/\.(js|css)($|\?)/.test(file))
+      ) {
         files.push(file)
       }
     })
diff --git a/src/server/template-renderer/index.js b/src/server/template-renderer/index.js
index dabc08a149c..c8927b2de2c 100644
--- a/src/server/template-renderer/index.js
+++ b/src/server/template-renderer/index.js
@@ -11,11 +11,12 @@ import type { ParsedTemplate } from './parse-template'
 import type { AsyncFileMapper } from './create-async-file-mapper'
 
 type TemplateRendererOptions = {
-  template: ?string;
+  template?: string | (content: string, context: any) => string;
   inject?: boolean;
   clientManifest?: ClientManifest;
   shouldPreload?: (file: string, type: string) => boolean;
   shouldPrefetch?: (file: string, type: string) => boolean;
+  serializer?: Function;
 };
 
 export type ClientManifest = {
@@ -41,26 +42,39 @@ type Resource = {
 export default class TemplateRenderer {
   options: TemplateRendererOptions;
   inject: boolean;
-  parsedTemplate: ParsedTemplate | null;
+  parsedTemplate: ParsedTemplate | Function | null;
   publicPath: string;
   clientManifest: ClientManifest;
   preloadFiles: Array<Resource>;
   prefetchFiles: Array<Resource>;
   mapFiles: AsyncFileMapper;
+  serialize: Function;
 
   constructor (options: TemplateRendererOptions) {
     this.options = options
     this.inject = options.inject !== false
     // if no template option is provided, the renderer is created
     // as a utility object for rendering assets like preload links and scripts.
-    this.parsedTemplate = options.template
-      ? parseTemplate(options.template)
+    
+    const { template } = options
+    this.parsedTemplate = template
+      ? typeof template === 'string'
+        ? parseTemplate(template)
+        : template
       : null
 
+    // function used to serialize initial state JSON
+    this.serialize = options.serializer || (state => {
+      return serialize(state, { isJSON: true })
+    })
+
     // extra functionality with client manifest
     if (options.clientManifest) {
       const clientManifest = this.clientManifest = options.clientManifest
-      this.publicPath = clientManifest.publicPath.replace(/\/$/, '')
+      // ensure publicPath ends with /
+      this.publicPath = clientManifest.publicPath === ''
+        ? ''
+        : clientManifest.publicPath.replace(/([^\/])$/, '$1/')
       // preload/prefetch directives
       this.preloadFiles = (clientManifest.initial || []).map(normalizeFile)
       this.prefetchFiles = (clientManifest.async || []).map(normalizeFile)
@@ -79,12 +93,17 @@ export default class TemplateRenderer {
   }
 
   // render synchronously given rendered app content and render context
-  renderSync (content: string, context: ?Object) {
+  render (content: string, context: ?Object): string | Promise<string> {
     const template = this.parsedTemplate
     if (!template) {
-      throw new Error('renderSync cannot be called without a template.')
+      throw new Error('render cannot be called without a template.')
     }
     context = context || {}
+
+    if (typeof template === 'function') {
+      return template(content, context)
+    }
+
     if (this.inject) {
       return (
         template.head(context) +
@@ -108,13 +127,13 @@ export default class TemplateRenderer {
   }
 
   renderStyles (context: Object): string {
-    const cssFiles = this.clientManifest
-      ? this.clientManifest.all.filter(isCSS)
-      : []
+    const initial = this.preloadFiles || []
+    const async = this.getUsedAsyncFiles(context) || []
+    const cssFiles = initial.concat(async).filter(({ file }) => isCSS(file))
     return (
       // render links for css files
       (cssFiles.length
-        ? cssFiles.map(file => `<link rel="stylesheet" href="${this.publicPath}/${file}">`).join('')
+        ? cssFiles.map(({ file }) => `<link rel="stylesheet" href="${this.publicPath}${file}">`).join('')
         : '') +
       // context.styles is a getter exposed by vue-style-loader which contains
       // the inline component styles collected during SSR
@@ -153,7 +172,7 @@ export default class TemplateRenderer {
           extra = ` type="font/${extension}" crossorigin`
         }
         return `<link rel="preload" href="${
-          this.publicPath}/${file
+          this.publicPath}${file
         }"${
           asType !== '' ? ` as="${asType}"` : ''
         }${
@@ -179,7 +198,7 @@ export default class TemplateRenderer {
         if (alreadyRendered(file)) {
           return ''
         }
-        return `<link rel="prefetch" href="${this.publicPath}/${file}">`
+        return `<link rel="prefetch" href="${this.publicPath}${file}">`
       }).join('')
     } else {
       return ''
@@ -191,22 +210,23 @@ export default class TemplateRenderer {
       contextKey = 'state',
       windowKey = '__INITIAL_STATE__'
     } = options || {}
-    const state = serialize(context[contextKey], { isJSON: true })
+    const state = this.serialize(context[contextKey])
     const autoRemove = process.env.NODE_ENV === 'production'
       ? ';(function(){var s;(s=document.currentScript||document.scripts[document.scripts.length-1]).parentNode.removeChild(s);}());'
       : ''
+    const nonceAttr = context.nonce ? ` nonce="${context.nonce}"` : ''
     return context[contextKey]
-      ? `<script>window.${windowKey}=${state}${autoRemove}</script>`
+      ? `<script${nonceAttr}>window.${windowKey}=${state}${autoRemove}</script>`
       : ''
   }
 
   renderScripts (context: Object): string {
     if (this.clientManifest) {
-      const initial = this.preloadFiles
-      const async = this.getUsedAsyncFiles(context)
-      const needed = [initial[0]].concat(async || [], initial.slice(1))
-      return needed.filter(({ file }) => isJS(file)).map(({ file }) => {
-        return `<script src="${this.publicPath}/${file}" defer></script>`
+      const initial = this.preloadFiles.filter(({ file }) => isJS(file))
+      const async = (this.getUsedAsyncFiles(context) || []).filter(({ file }) => isJS(file))
+      const needed = [initial[0]].concat(async, initial.slice(1))
+      return needed.map(({ file }) => {
+        return `<script src="${this.publicPath}${file}" defer></script>`
       }).join('')
     } else {
       return ''
diff --git a/src/server/webpack-plugin/client.js b/src/server/webpack-plugin/client.js
index 5f2cd4bd6c6..ec7b87578b4 100644
--- a/src/server/webpack-plugin/client.js
+++ b/src/server/webpack-plugin/client.js
@@ -1,6 +1,6 @@
 const hash = require('hash-sum')
 const uniq = require('lodash.uniq')
-import { isJS } from './util'
+import { isJS, isCSS, getAssetName, onEmit, stripModuleIdHash } from './util'
 
 export default class VueSSRClientPlugin {
   constructor (options = {}) {
@@ -10,7 +10,8 @@ export default class VueSSRClientPlugin {
   }
 
   apply (compiler) {
-    compiler.plugin('emit', (compilation, cb) => {
+    const stage = 'PROCESS_ASSETS_STAGE_ADDITIONAL'
+    onEmit(compiler, 'vue-client-plugin', stage, (compilation, cb) => {
       const stats = compilation.getStats().toJson()
 
       const allFiles = uniq(stats.assets
@@ -19,10 +20,11 @@ export default class VueSSRClientPlugin {
       const initialFiles = uniq(Object.keys(stats.entrypoints)
         .map(name => stats.entrypoints[name].assets)
         .reduce((assets, all) => all.concat(assets), [])
-        .filter(isJS))
+        .map(getAssetName)
+        .filter((file) => isJS(file) || isCSS(file)))
 
       const asyncFiles = allFiles
-        .filter(isJS)
+        .filter((file) => isJS(file) || isCSS(file))
         .filter(file => initialFiles.indexOf(file) < 0)
 
       const manifest = {
@@ -34,7 +36,7 @@ export default class VueSSRClientPlugin {
       }
 
       const assetModules = stats.modules.filter(m => m.assets.length)
-      const fileToIndex = file => manifest.all.indexOf(file)
+      const fileToIndex = asset => manifest.all.indexOf(getAssetName(asset))
       stats.modules.forEach(m => {
         // ignore modules duplicated in multiple chunks
         if (m.chunks.length === 1) {
@@ -43,7 +45,8 @@ export default class VueSSRClientPlugin {
           if (!chunk || !chunk.files) {
             return
           }
-          const files = manifest.modules[hash(m.identifier)] = chunk.files.map(fileToIndex)
+          const id = stripModuleIdHash(m.identifier)
+          const files = manifest.modules[hash(id)] = chunk.files.map(fileToIndex)
           // find all asset modules associated with the same chunk
           assetModules.forEach(m => {
             if (m.chunks.some(id => id === cid)) {
@@ -53,12 +56,6 @@ export default class VueSSRClientPlugin {
         }
       })
 
-      // const debug = (file, obj) => {
-      //   require('fs').writeFileSync(__dirname + '/' + file, JSON.stringify(obj, null, 2))
-      // }
-      // debug('stats.json', stats)
-      // debug('client-manifest.json', manifest)
-
       const json = JSON.stringify(manifest, null, 2)
       compilation.assets[this.options.filename] = {
         source: () => json,
diff --git a/src/server/webpack-plugin/server.js b/src/server/webpack-plugin/server.js
index 8ffa58b03ee..02fab245bf9 100644
--- a/src/server/webpack-plugin/server.js
+++ b/src/server/webpack-plugin/server.js
@@ -1,4 +1,4 @@
-import { validate, isJS } from './util'
+import { validate, isJS, getAssetName, onEmit } from './util'
 
 export default class VueSSRServerPlugin {
   constructor (options = {}) {
@@ -10,7 +10,8 @@ export default class VueSSRServerPlugin {
   apply (compiler) {
     validate(compiler)
 
-    compiler.plugin('emit', (compilation, cb) => {
+    const stage = 'PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER'
+    onEmit(compiler, 'vue-server-plugin', stage, (compilation, cb) => {
       const stats = compilation.getStats().toJson()
       const entryName = Object.keys(stats.entrypoints)[0]
       const entryInfo = stats.entrypoints[entryName]
@@ -20,7 +21,9 @@ export default class VueSSRServerPlugin {
         return cb()
       }
 
-      const entryAssets = entryInfo.assets.filter(isJS)
+      const entryAssets = entryInfo.assets
+        .map(getAssetName)
+        .filter(isJS)
 
       if (entryAssets.length > 1) {
         throw new Error(
@@ -42,14 +45,14 @@ export default class VueSSRServerPlugin {
         maps: {}
       }
 
-      stats.assets.forEach(asset => {
-        if (asset.name.match(/\.js$/)) {
-          bundle.files[asset.name] = compilation.assets[asset.name].source()
-        } else if (asset.name.match(/\.js\.map$/)) {
-          bundle.maps[asset.name.replace(/\.map$/, '')] = JSON.parse(compilation.assets[asset.name].source())
+      Object.keys(compilation.assets).forEach(name => {
+        if (isJS(name)) {
+          bundle.files[name] = compilation.assets[name].source()
+        } else if (name.match(/\.js\.map$/)) {
+          bundle.maps[name.replace(/\.map$/, '')] = JSON.parse(compilation.assets[name].source())
         }
         // do not emit anything else for server
-        delete compilation.assets[asset.name]
+        delete compilation.assets[name]
       })
 
       const json = JSON.stringify(bundle, null, 2)
diff --git a/src/server/webpack-plugin/util.js b/src/server/webpack-plugin/util.js
index d22e4b2c497..844671bbd7a 100644
--- a/src/server/webpack-plugin/util.js
+++ b/src/server/webpack-plugin/util.js
@@ -1,16 +1,27 @@
 const { red, yellow } = require('chalk')
+const webpack = require('webpack')
 
 const prefix = `[vue-server-renderer-webpack-plugin]`
 const warn = exports.warn = msg => console.error(red(`${prefix} ${msg}\n`))
 const tip = exports.tip = msg => console.log(yellow(`${prefix} ${msg}\n`))
 
+const isWebpack5 = !!(webpack.version && webpack.version[0] > 4)
+
 export const validate = compiler => {
   if (compiler.options.target !== 'node') {
     warn('webpack config `target` should be "node".')
   }
 
-  if (compiler.options.output && compiler.options.output.libraryTarget !== 'commonjs2') {
-    warn('webpack config `output.libraryTarget` should be "commonjs2".')
+  if (compiler.options.output) {
+    if (compiler.options.output.library) {
+      // Webpack >= 5.0.0
+      if (compiler.options.output.library.type !== 'commonjs2') {
+        warn('webpack config `output.library.type` should be "commonjs2".')
+      }
+    } else if (compiler.options.output.libraryTarget !== 'commonjs2') {
+      // Webpack < 5.0.0
+      warn('webpack config `output.libraryTarget` should be "commonjs2".')
+    }
   }
 
   if (!compiler.options.externals) {
@@ -21,4 +32,42 @@ export const validate = compiler => {
   }
 }
 
+export const onEmit = (compiler, name, stageName, hook) => {
+  if (isWebpack5) {
+    // Webpack >= 5.0.0
+    compiler.hooks.compilation.tap(name, compilation => {
+      if (compilation.compiler !== compiler) {
+        // Ignore child compilers
+        return
+      }
+      const stage = webpack.Compilation[stageName]
+      compilation.hooks.processAssets.tapAsync({ name, stage }, (assets, cb) => {
+        hook(compilation, cb)
+      })
+    })
+  } else if (compiler.hooks) {
+    // Webpack >= 4.0.0
+    compiler.hooks.emit.tapAsync(name, hook)
+  } else {
+    // Webpack < 4.0.0
+    compiler.plugin('emit', hook)
+  }
+}
+
+export const stripModuleIdHash = id => {
+  if (isWebpack5) {
+    // Webpack >= 5.0.0
+    return id.replace(/\|\w+$/, '')
+  }
+  // Webpack < 5.0.0
+  return id.replace(/\s\w+$/, '')
+}
+
+export const getAssetName = asset => {
+  if (typeof asset === 'string') {
+    return asset
+  }
+  return asset.name
+}
+
 export { isJS, isCSS } from '../util'
diff --git a/src/server/write.js b/src/server/write.js
index e642081852c..27a5e8a2667 100644
--- a/src/server/write.js
+++ b/src/server/write.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-const MAX_STACK_DEPTH = 1000
+const MAX_STACK_DEPTH = 800
 const noop = _ => _
 
 const defer = typeof process !== 'undefined' && process.nextTick
diff --git a/src/sfc/parser.js b/src/sfc/parser.js
index 868a43ca082..59c5fc3a2c0 100644
--- a/src/sfc/parser.js
+++ b/src/sfc/parser.js
@@ -8,11 +8,6 @@ const splitRE = /\r?\n/g
 const replaceRE = /./g
 const isSpecialTag = makeMap('script,style,template', true)
 
-type Attribute = {
-  name: string,
-  value: string
-};
-
 /**
  * Parse a single-file component (*.vue) file into an SFC Descriptor Object.
  */
@@ -24,14 +19,32 @@ export function parseComponent (
     template: null,
     script: null,
     styles: [],
-    customBlocks: []
+    customBlocks: [],
+    errors: []
   }
   let depth = 0
   let currentBlock: ?SFCBlock = null
 
+  let warn = msg => {
+    sfc.errors.push(msg)
+  }
+
+  if (process.env.NODE_ENV !== 'production' && options.outputSourceRange) {
+    warn = (msg, range) => {
+      const data: WarningMessage = { msg }
+      if (range.start != null) {
+        data.start = range.start
+      }
+      if (range.end != null) {
+        data.end = range.end
+      }
+      sfc.errors.push(data)
+    }
+  }
+
   function start (
     tag: string,
-    attrs: Array<Attribute>,
+    attrs: Array<ASTAttr>,
     unary: boolean,
     start: number,
     end: number
@@ -62,7 +75,7 @@ export function parseComponent (
     }
   }
 
-  function checkAttrs (block: SFCBlock, attrs: Array<Attribute>) {
+  function checkAttrs (block: SFCBlock, attrs: Array<ASTAttr>) {
     for (let i = 0; i < attrs.length; i++) {
       const attr = attrs[i]
       if (attr.name === 'lang') {
@@ -80,10 +93,13 @@ export function parseComponent (
     }
   }
 
-  function end (tag: string, start: number, end: number) {
+  function end (tag: string, start: number) {
     if (depth === 1 && currentBlock) {
       currentBlock.end = start
-      let text = deindent(content.slice(currentBlock.start, currentBlock.end))
+      let text = content.slice(currentBlock.start, currentBlock.end)
+      if (options.deindent !== false) {
+        text = deindent(text)
+      }
       // pad content so that linters and pre-processors can output correct
       // line numbers in errors and warnings
       if (currentBlock.type !== 'template' && options.pad) {
@@ -108,8 +124,10 @@ export function parseComponent (
   }
 
   parseHTML(content, {
+    warn,
     start,
-    end
+    end,
+    outputSourceRange: options.outputSourceRange
   })
 
   return sfc
diff --git a/src/shared/constants.js b/src/shared/constants.js
index 84d019fb4ca..a8b15e043dd 100644
--- a/src/shared/constants.js
+++ b/src/shared/constants.js
@@ -17,5 +17,6 @@ export const LIFECYCLE_HOOKS = [
   'destroyed',
   'activated',
   'deactivated',
-  'errorCaptured'
+  'errorCaptured',
+  'serverPrefetch'
 ]
diff --git a/src/shared/util.js b/src/shared/util.js
index a0bc957ee93..3168a1ff9c0 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -2,8 +2,8 @@
 
 export const emptyObject = Object.freeze({})
 
-// these helpers produces better vm code in JS engines due to their
-// explicitness and function inlining
+// These helpers produce better VM code in JS engines due to their
+// explicitness and function inlining.
 export function isUndef (v: any): boolean %checks {
   return v === undefined || v === null
 }
@@ -21,7 +21,7 @@ export function isFalse (v: any): boolean %checks {
 }
 
 /**
- * Check if value is primitive
+ * Check if value is primitive.
  */
 export function isPrimitive (value: any): boolean %checks {
   return (
@@ -35,7 +35,7 @@ export function isPrimitive (value: any): boolean %checks {
 
 /**
  * Quick object check - this is primarily used to tell
- * Objects from primitive values when we know the value
+ * objects from primitive values when we know the value
  * is a JSON-compliant type.
  */
 export function isObject (obj: mixed): boolean %checks {
@@ -43,7 +43,7 @@ export function isObject (obj: mixed): boolean %checks {
 }
 
 /**
- * Get the raw type string of a value e.g. [object Object]
+ * Get the raw type string of a value, e.g., [object Object].
  */
 const _toString = Object.prototype.toString
 
@@ -71,19 +71,27 @@ export function isValidArrayIndex (val: any): boolean {
   return n >= 0 && Math.floor(n) === n && isFinite(val)
 }
 
+export function isPromise (val: any): boolean {
+  return (
+    isDef(val) &&
+    typeof val.then === 'function' &&
+    typeof val.catch === 'function'
+  )
+}
+
 /**
  * Convert a value to a string that is actually rendered.
  */
 export function toString (val: any): string {
   return val == null
     ? ''
-    : typeof val === 'object'
+    : Array.isArray(val) || (isPlainObject(val) && val.toString === _toString)
       ? JSON.stringify(val, null, 2)
       : String(val)
 }
 
 /**
- * Convert a input value to a number for persistence.
+ * Convert an input value to a number for persistence.
  * If the conversion fails, return original string.
  */
 export function toNumber (val: string): number | string {
@@ -115,12 +123,12 @@ export function makeMap (
 export const isBuiltInTag = makeMap('slot,component', true)
 
 /**
- * Check if a attribute is a reserved attribute.
+ * Check if an attribute is a reserved attribute.
  */
 export const isReservedAttribute = makeMap('key,ref,slot,slot-scope,is')
 
 /**
- * Remove an item from an array
+ * Remove an item from an array.
  */
 export function remove (arr: Array<any>, item: any): Array<any> | void {
   if (arr.length) {
@@ -132,7 +140,7 @@ export function remove (arr: Array<any>, item: any): Array<any> | void {
 }
 
 /**
- * Check whether the object has the property.
+ * Check whether an object has the property.
  */
 const hasOwnProperty = Object.prototype.hasOwnProperty
 export function hasOwn (obj: Object | Array<*>, key: string): boolean {
@@ -174,22 +182,36 @@ export const hyphenate = cached((str: string): string => {
 })
 
 /**
- * Simple bind, faster than native
+ * Simple bind polyfill for environments that do not support it,
+ * e.g., PhantomJS 1.x. Technically, we don't need this anymore
+ * since native bind is now performant enough in most browsers.
+ * But removing it would mean breaking code that was able to run in
+ * PhantomJS 1.x, so this must be kept for backward compatibility.
  */
-export function bind (fn: Function, ctx: Object): Function {
+
+/* istanbul ignore next */
+function polyfillBind (fn: Function, ctx: Object): Function {
   function boundFn (a) {
-    const l: number = arguments.length
+    const l = arguments.length
     return l
       ? l > 1
         ? fn.apply(ctx, arguments)
         : fn.call(ctx, a)
       : fn.call(ctx)
   }
-  // record original fn length
+
   boundFn._length = fn.length
   return boundFn
 }
 
+function nativeBind (fn: Function, ctx: Object): Function {
+  return fn.bind(ctx)
+}
+
+export const bind = Function.prototype.bind
+  ? nativeBind
+  : polyfillBind
+
 /**
  * Convert an Array-like object to a real Array.
  */
@@ -226,10 +248,12 @@ export function toObject (arr: Array<any>): Object {
   return res
 }
 
+/* eslint-disable no-unused-vars */
+
 /**
  * Perform no operation.
  * Stubbing args to make Flow happy without leaving useless transpiled code
- * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/)
+ * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
  */
 export function noop (a?: any, b?: any, c?: any) {}
 
@@ -238,13 +262,15 @@ export function noop (a?: any, b?: any, c?: any) {}
  */
 export const no = (a?: any, b?: any, c?: any) => false
 
+/* eslint-enable no-unused-vars */
+
 /**
- * Return same value
+ * Return the same value.
  */
 export const identity = (_: any) => _
 
 /**
- * Generate a static keys string from compiler modules.
+ * Generate a string containing static keys from compiler modules.
  */
 export function genStaticKeys (modules: Array<ModuleOptions>): string {
   return modules.reduce((keys, m) => {
@@ -268,6 +294,8 @@ export function looseEqual (a: any, b: any): boolean {
         return a.length === b.length && a.every((e, i) => {
           return looseEqual(e, b[i])
         })
+      } else if (a instanceof Date && b instanceof Date) {
+        return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         const keysA = Object.keys(a)
         const keysB = Object.keys(b)
@@ -289,6 +317,11 @@ export function looseEqual (a: any, b: any): boolean {
   }
 }
 
+/**
+ * Return the first index at which a loosely equal value can be
+ * found in the array (if value is a plain object, the array must
+ * contain an object of the same shape), or -1 if it is not present.
+ */
 export function looseIndexOf (arr: Array<mixed>, val: mixed): number {
   for (let i = 0; i < arr.length; i++) {
     if (looseEqual(arr[i], val)) return i
diff --git a/test/e2e/.eslintrc b/test/e2e/.eslintrc.json
similarity index 100%
rename from test/e2e/.eslintrc
rename to test/e2e/.eslintrc.json
diff --git a/test/e2e/nightwatch.config.js b/test/e2e/nightwatch.config.js
index 2004f92b45b..8ec592494fe 100644
--- a/test/e2e/nightwatch.config.js
+++ b/test/e2e/nightwatch.config.js
@@ -50,7 +50,8 @@ module.exports = {
       'desiredCapabilities': {
         'browserName': 'phantomjs',
         'javascriptEnabled': true,
-        'acceptSslCerts': true
+        'acceptSslCerts': true,
+        'phantomjs.binary.path': require('phantomjs-prebuilt').path
       }
     }
   }
diff --git a/test/e2e/runner.js b/test/e2e/runner.js
index d59506d9f73..dadce70d1d7 100644
--- a/test/e2e/runner.js
+++ b/test/e2e/runner.js
@@ -1,25 +1,25 @@
-var path = require('path')
-var spawn = require('cross-spawn')
-var httpServer = require('http-server')
-var server = httpServer.createServer({
+const path = require('path')
+const spawn = require('cross-spawn')
+const httpServer = require('http-server')
+const server = httpServer.createServer({
   root: path.resolve(__dirname, '../../')
 })
 
 server.listen(8080)
 
-var args = process.argv.slice(2)
+let args = process.argv.slice(2)
 if (args.indexOf('--config') === -1) {
   args = args.concat(['--config', 'test/e2e/nightwatch.config.js'])
 }
 if (args.indexOf('--env') === -1) {
   args = args.concat(['--env', 'chrome,phantomjs'])
 }
-var i = args.indexOf('--test')
+const i = args.indexOf('--test')
 if (i > -1) {
   args[i + 1] = 'test/e2e/specs/' + args[i + 1] + '.js'
 }
 
-var runner = spawn('./node_modules/.bin/nightwatch', args, {
+const runner = spawn('./node_modules/.bin/nightwatch', args, {
   stdio: 'inherit'
 })
 
diff --git a/test/e2e/specs/async-edge-cases.html b/test/e2e/specs/async-edge-cases.html
index 4c7411b2e5d..7bca8f8cb9c 100644
--- a/test/e2e/specs/async-edge-cases.html
+++ b/test/e2e/specs/async-edge-cases.html
@@ -6,7 +6,6 @@
     <script src="../../../dist/vue.min.js"></script>
   </head>
   <body>
-
     <!-- #4510 click and change event on checkbox -->
     <div id="case-1">
       <div @click="num++">
diff --git a/test/e2e/specs/async-edge-cases.js b/test/e2e/specs/async-edge-cases.js
index 2873409400b..27212b76d65 100644
--- a/test/e2e/specs/async-edge-cases.js
+++ b/test/e2e/specs/async-edge-cases.js
@@ -14,7 +14,7 @@ module.exports = {
       .assert.containsText('#case-1', '3')
       .assert.checked('#case-1 input', false)
 
-      // #6566
+      // // #6566
       .assert.containsText('#case-2 button', 'Expand is True')
       .assert.containsText('.count-a', 'countA: 0')
       .assert.containsText('.count-b', 'countB: 0')
diff --git a/test/e2e/specs/grid.js b/test/e2e/specs/grid.js
index 7c273359e1b..ab635b28f86 100644
--- a/test/e2e/specs/grid.js
+++ b/test/e2e/specs/grid.js
@@ -1,6 +1,6 @@
 module.exports = {
   'grid': function (browser) {
-    var columns = ['name', 'power']
+    const columns = ['name', 'power']
 
     browser
     .url('http://localhost:8080/examples/grid/')
@@ -92,8 +92,8 @@ module.exports = {
 
     function assertTable (data) {
       browser.assert.count('td', data.length * columns.length)
-      for (var i = 0; i < data.length; i++) {
-        for (var j = 0; j < columns.length; j++) {
+      for (let i = 0; i < data.length; i++) {
+        for (let j = 0; j < columns.length; j++) {
           browser.assert.containsText(
             'tr:nth-child(' + (i + 1) + ') td:nth-child(' + (j + 1) + ')',
             data[i][columns[j]]
diff --git a/test/e2e/specs/svg.js b/test/e2e/specs/svg.js
index 7726bff5690..cc9af55f62a 100644
--- a/test/e2e/specs/svg.js
+++ b/test/e2e/specs/svg.js
@@ -12,8 +12,8 @@ module.exports = {
       .assert.count('button', 7)
       .assert.count('input[type="range"]', 6)
       .assert.evaluate(function () {
-        var points = stats.map(function (stat, i) {
-        var point = valueToPoint(stat.value, i, 6)
+        const points = stats.map(function (stat, i) {
+        const point = valueToPoint(stat.value, i, 6)
           return point.x + ',' + point.y
         }).join(' ')
         return document.querySelector('polygon').attributes[0].value === points
@@ -24,8 +24,8 @@ module.exports = {
       .assert.count('button', 6)
       .assert.count('input[type="range"]', 5)
       .assert.evaluate(function () {
-        var points = stats.map(function (stat, i) {
-        var point = valueToPoint(stat.value, i, 5)
+        const points = stats.map(function (stat, i) {
+        const point = valueToPoint(stat.value, i, 5)
           return point.x + ',' + point.y
         }).join(' ')
         return document.querySelector('polygon').attributes[0].value === points
@@ -37,8 +37,8 @@ module.exports = {
       .assert.count('button', 7)
       .assert.count('input[type="range"]', 6)
       .assert.evaluate(function () {
-        var points = stats.map(function (stat, i) {
-        var point = valueToPoint(stat.value, i, 6)
+        const points = stats.map(function (stat, i) {
+        const point = valueToPoint(stat.value, i, 6)
           return point.x + ',' + point.y
         }).join(' ')
         return document.querySelector('polygon').attributes[0].value === points
diff --git a/test/e2e/specs/todomvc.js b/test/e2e/specs/todomvc.js
index 7f3c42fe7cc..7720b04ddd5 100644
--- a/test/e2e/specs/todomvc.js
+++ b/test/e2e/specs/todomvc.js
@@ -119,7 +119,7 @@ module.exports = {
       .assert.focused('.todo:nth-child(1) .edit')
       .clearValue('.todo:nth-child(1) .edit')
       .setValue('.todo:nth-child(1) .edit', 'edited!')
-      .click('footer') // blur
+      .click('.new-todo') // blur
       .assert.count('.todo.editing', 0)
       .assert.containsText('.todo:nth-child(1) label', 'edited!')
 
diff --git a/test/e2e/specs/tree.js b/test/e2e/specs/tree.js
index 92ae25d778f..08df908ad44 100644
--- a/test/e2e/specs/tree.js
+++ b/test/e2e/specs/tree.js
@@ -63,8 +63,8 @@ module.exports = {
       .assert.count('.item > ul', 5)
       .assert.containsText('#demo ul > .item:nth-child(1)', '[-]')
       .assert.evaluate(function () {
-        var firstItem = document.querySelector('#demo ul > .item:nth-child(1)')
-        var ul = firstItem.querySelector('ul')
+        const firstItem = document.querySelector('#demo ul > .item:nth-child(1)')
+        const ul = firstItem.querySelector('ul')
         return ul.children.length === 2
       })
       .end()
diff --git a/test/helpers/.eslintrc b/test/helpers/.eslintrc.json
similarity index 100%
rename from test/helpers/.eslintrc
rename to test/helpers/.eslintrc.json
diff --git a/test/helpers/to-have-been-warned.js b/test/helpers/to-have-been-warned.js
index 097b0e6e02b..b3a5eaae0e3 100644
--- a/test/helpers/to-have-been-warned.js
+++ b/test/helpers/to-have-been-warned.js
@@ -14,8 +14,8 @@ let asserted
 
 function createCompareFn (spy) {
   const hasWarned = msg => {
-    var count = spy.calls.count()
-    var args
+    let count = spy.calls.count()
+    let args
     while (count--) {
       args = spy.calls.argsFor(count)
       if (args.some(containsMsg)) {
@@ -31,7 +31,7 @@ function createCompareFn (spy) {
   return {
     compare: msg => {
       asserted = asserted.concat(msg)
-      var warned = Array.isArray(msg)
+      const warned = Array.isArray(msg)
         ? msg.some(hasWarned)
         : hasWarned(msg)
       return {
diff --git a/test/helpers/trigger-event.js b/test/helpers/trigger-event.js
index 12ea7e2b9ba..e2825135730 100644
--- a/test/helpers/trigger-event.js
+++ b/test/helpers/trigger-event.js
@@ -1,6 +1,9 @@
 window.triggerEvent = function triggerEvent (target, event, process) {
-  var e = document.createEvent('HTMLEvents')
+  const e = document.createEvent('HTMLEvents')
   e.initEvent(event, true, true)
+  if (event === 'click') {
+    e.button = 0
+  }
   if (process) process(e)
   target.dispatchEvent(e)
 }
diff --git a/test/ssr/compile-with-webpack.js b/test/ssr/compile-with-webpack.js
index 765898e966d..6e648c8b489 100644
--- a/test/ssr/compile-with-webpack.js
+++ b/test/ssr/compile-with-webpack.js
@@ -4,6 +4,7 @@ import MemoryFS from 'memory-fs'
 
 export function compileWithWebpack (file, extraConfig, cb) {
   const config = Object.assign({
+    mode: 'development',
     entry: path.resolve(__dirname, 'fixtures', file),
     module: {
       rules: [
diff --git a/test/ssr/fixtures/async-foo.js b/test/ssr/fixtures/async-foo.js
index 929d73f43c5..59e0b9abce3 100644
--- a/test/ssr/fixtures/async-foo.js
+++ b/test/ssr/fixtures/async-foo.js
@@ -3,7 +3,7 @@ import './test.css'
 import font from './test.woff2'
 import image from './test.png'
 
-module.exports = {
+export default {
   beforeCreate () {
     this.$vnode.ssrContext._registeredComponents.add('__MODULE_ID__')
   },
diff --git a/test/ssr/fixtures/cache-opt-out.js b/test/ssr/fixtures/cache-opt-out.js
new file mode 100644
index 00000000000..772d403c04d
--- /dev/null
+++ b/test/ssr/fixtures/cache-opt-out.js
@@ -0,0 +1,16 @@
+import Vue from '../../../dist/vue.runtime.common.js'
+
+const app = {
+  name: 'app',
+  props: ['id'],
+  serverCacheKey: props => props.id === 1 ? false : props.id,
+  render (h) {
+    return h('div', '/test')
+  }
+}
+
+export default () => {
+  return Promise.resolve(new Vue({
+    render: h => h(app, { props: { id: 1 }})
+  }))
+}
diff --git a/test/ssr/fixtures/split.js b/test/ssr/fixtures/split.js
index 5cd38508f2b..0282f1035ad 100644
--- a/test/ssr/fixtures/split.js
+++ b/test/ssr/fixtures/split.js
@@ -19,7 +19,7 @@ export default context => {
     // simulate router.onReady
     Foo().then(comp => {
       // resolve now to make the render sync
-      Foo.resolved = Vue.extend(comp)
+      Foo.resolved = Vue.extend(comp.default)
       resolve(vm)
     })
   })
diff --git a/test/ssr/jasmine.js b/test/ssr/jasmine.js
new file mode 100644
index 00000000000..b632601642d
--- /dev/null
+++ b/test/ssr/jasmine.js
@@ -0,0 +1,10 @@
+module.exports = {
+  spec_dir: 'test/ssr',
+  spec_files: [
+    '*.spec.js'
+  ],
+  helpers: [
+    require.resolve('@babel/register'),
+    '../helpers/to-have-been-warned.js'
+  ]
+}
diff --git a/test/ssr/jasmine.json b/test/ssr/jasmine.json
deleted file mode 100644
index 345ed149d3c..00000000000
--- a/test/ssr/jasmine.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "spec_dir": "test/ssr",
-  "spec_files": [
-    "*.spec.js"
-  ],
-  "helpers": [
-    "../../node_modules/babel-register/lib/node.js"
-  ]
-}
diff --git a/test/ssr/ssr-basic-renderer.spec.js b/test/ssr/ssr-basic-renderer.spec.js
index 7cbacbee726..04c8d80e6a7 100644
--- a/test/ssr/ssr-basic-renderer.spec.js
+++ b/test/ssr/ssr-basic-renderer.spec.js
@@ -52,7 +52,7 @@ describe('SSR: basicRenderer', () => {
   })
 
   // #5941
-  it('should work peoperly when accessing $ssrContext in root component', done => {
+  it('should work properly when accessing $ssrContext in root component', done => {
     let ssrContext
     renderToString(new Vue({
       template: `
@@ -61,7 +61,7 @@ describe('SSR: basicRenderer', () => {
       created () {
         ssrContext = this.$ssrContext
       }
-    }), (err, result) => {
+    }), (err) => {
       expect(err).toBeNull()
       expect(ssrContext).toBeUndefined()
       done()
diff --git a/test/ssr/ssr-bundle-render.spec.js b/test/ssr/ssr-bundle-render.spec.js
index 8ea05b32172..ce7f8780a90 100644
--- a/test/ssr/ssr-bundle-render.spec.js
+++ b/test/ssr/ssr-bundle-render.spec.js
@@ -195,7 +195,7 @@ function createAssertions (runInNewContext) {
   })
 
   it('render with cache (nested)', done => {
-    const cache = LRU({ maxAge: Infinity })
+    const cache = new LRU({ maxAge: Infinity })
     spyOn(cache, 'get').and.callThrough()
     spyOn(cache, 'set').and.callThrough()
     const options = {
@@ -231,6 +231,44 @@ function createAssertions (runInNewContext) {
     })
   })
 
+  it('render with cache (opt-out)', done => {
+    const cache = {}
+    const get = jasmine.createSpy('get')
+    const set = jasmine.createSpy('set')
+    const options = {
+      runInNewContext,
+      cache: {
+        // async
+        get: (key, cb) => {
+          setTimeout(() => {
+            get(key)
+            cb(cache[key])
+          }, 0)
+        },
+        set: (key, val) => {
+          set(key, val)
+          cache[key] = val
+        }
+      }
+    }
+    createRenderer('cache-opt-out.js', options, renderer => {
+      const expected = '<div data-server-rendered="true">/test</div>'
+      renderer.renderToString((err, res) => {
+        expect(err).toBeNull()
+        expect(res).toBe(expected)
+        expect(get).not.toHaveBeenCalled()
+        expect(set).not.toHaveBeenCalled()
+        renderer.renderToString((err, res) => {
+          expect(err).toBeNull()
+          expect(res).toBe(expected)
+          expect(get).not.toHaveBeenCalled()
+          expect(set).not.toHaveBeenCalled()
+          done()
+        })
+      })
+    })
+  })
+
   it('renderToString (bundle format with code split)', done => {
     createRenderer('split.js', { runInNewContext, asBundle: true }, renderer => {
       const context = { url: '/test' }
diff --git a/test/ssr/ssr-stream.spec.js b/test/ssr/ssr-stream.spec.js
index b18707abff3..04e79658984 100644
--- a/test/ssr/ssr-stream.spec.js
+++ b/test/ssr/ssr-stream.spec.js
@@ -89,9 +89,9 @@ describe('SSR: renderToStream', () => {
       template: `<div></div>`,
       _scopeId: '_component2'
     })
-    var stream1 = renderToStream(component1)
-    var stream2 = renderToStream(component2)
-    var res = ''
+    const stream1 = renderToStream(component1)
+    const stream2 = renderToStream(component2)
+    let res = ''
     stream1.on('data', (text) => {
       res += text.toString('utf-8').replace(/x/g, '')
     })
@@ -102,4 +102,26 @@ describe('SSR: renderToStream', () => {
     stream1.read(1)
     stream2.read(1)
   })
+
+  it('should call context.rendered', done => {
+    let a = 0
+    const stream = renderToStream(new Vue({
+      template: `
+        <div>Hello</div>
+      `
+    }), {
+      rendered: () => {
+        a = 42
+      }
+    })
+    let res = ''
+    stream.on('data', chunk => {
+      res += chunk
+    })
+    stream.on('end', () => {
+      expect(res).toContain('<div data-server-rendered="true">Hello</div>')
+      expect(a).toBe(42)
+      done()
+    })
+  })
 })
diff --git a/test/ssr/ssr-string.spec.js b/test/ssr/ssr-string.spec.js
index 66ed897ce72..33094be9c33 100644
--- a/test/ssr/ssr-string.spec.js
+++ b/test/ssr/ssr-string.spec.js
@@ -267,6 +267,17 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  it('v-show directive merge with style', done => {
+    renderVmWithOptions({
+      template: '<div :style="[{lineHeight: 1}]" v-show="false"><span>inner</span></div>'
+    }, res => {
+      expect(res).toContain(
+        '<div data-server-rendered="true" style="line-height:1;display:none;"><span>inner</span></div>'
+      )
+      done()
+    })
+  })
+
   it('v-show directive not passed to child', done => {
     renderVmWithOptions({
       template: '<foo v-show="false"></foo>',
@@ -575,6 +586,95 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  it('renders async component (functional, single node)', done => {
+    renderVmWithOptions({
+      template: `
+        <div>
+          <test-async></test-async>
+        </div>
+      `,
+      components: {
+        testAsync (resolve) {
+          setTimeout(() => resolve({
+            functional: true,
+            render (h) {
+              return h('span', { class: ['b'] }, 'testAsync')
+            }
+          }), 1)
+        }
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true"><span class="b">testAsync</span></div>')
+      done()
+    })
+  })
+
+  it('renders async component (functional, multiple nodes)', done => {
+    renderVmWithOptions({
+      template: `
+        <div>
+          <test-async></test-async>
+        </div>
+      `,
+      components: {
+        testAsync (resolve) {
+          setTimeout(() => resolve({
+            functional: true,
+            render (h) {
+              return [
+                h('span', { class: ['a'] }, 'foo'),
+                h('span', { class: ['b'] }, 'bar')
+              ]
+            }
+          }), 1)
+        }
+      }
+    }, result => {
+      expect(result).toContain(
+        '<div data-server-rendered="true">' +
+          '<span class="a">foo</span>' +
+          '<span class="b">bar</span>' +
+        '</div>'
+      )
+      done()
+    })
+  })
+
+  it('renders nested async functional component', done => {
+    renderVmWithOptions({
+      template: `
+        <div>
+          <outer-async></outer-async>
+        </div>
+      `,
+      components: {
+        outerAsync (resolve) {
+          setTimeout(() => resolve({
+            functional: true,
+            render (h) {
+              return h('innerAsync')
+            }
+          }), 1)
+        },
+        innerAsync (resolve) {
+          setTimeout(() => resolve({
+            functional: true,
+            render (h) {
+              return h('span', { class: ['a'] }, 'inner')
+            },
+          }), 1)
+        }
+      }
+    }, result => {
+      expect(result).toContain(
+        '<div data-server-rendered="true">' +
+          '<span class="a">inner</span>' +
+        '</div>'
+      )
+      done()
+    })
+  })
+
   it('should catch async component error', done => {
     Vue.config.silent = true
     renderToString(new Vue({
@@ -594,6 +694,34 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  // #11963, #10391
+  it('renders async children passed in slots', done => {
+    const Parent = {
+      template: `<div><slot name="child"/></div>`
+    }
+    const Child = {
+      template: `<p>child</p>`
+    }
+    renderVmWithOptions({
+      template: `
+      <Parent>
+        <template #child>
+          <Child/>
+        </template>
+      </Parent>
+      `,
+      components: {
+        Parent,
+        Child: () => Promise.resolve(Child)
+      }
+    }, result => {
+      expect(result).toContain(
+        `<div data-server-rendered="true"><p>child</p></div>`
+      )
+      done()
+    })
+  })
+
   it('everything together', done => {
     renderVmWithOptions({
       template: `
@@ -761,6 +889,22 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  it('should not warn for custom directives that do not have server-side implementation', done => {
+    renderToString(new Vue({
+      directives: {
+        test: {
+          bind() {
+            // noop
+          }
+        }
+      },
+      template: '<div v-test></div>',
+    }), () => {
+      expect('Failed to resolve directive: test').not.toHaveBeenWarned()
+      done()
+    })
+  })
+
   it('_scopeId', done => {
     renderVmWithOptions({
       _scopeId: '_v-parent',
@@ -864,6 +1008,40 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  it('should prevent xss in attribute names', done => {
+    renderVmWithOptions({
+      data: {
+        xss: {
+          'foo="bar"></div><script>alert(1)</script>': ''
+        }
+      },
+      template: `
+        <div v-bind="xss"></div>
+      `
+    }, res => {
+      expect(res).not.toContain(`<script>alert(1)</script>`)
+      done()
+    })
+  })
+
+  it('should prevent xss in attribute names (optimized)', done => {
+    renderVmWithOptions({
+      data: {
+        xss: {
+          'foo="bar"></div><script>alert(1)</script>': ''
+        }
+      },
+      template: `
+        <div>
+          <a v-bind="xss">foo</a>
+        </div>
+      `
+    }, res => {
+      expect(res).not.toContain(`<script>alert(1)</script>`)
+      done()
+    })
+  })
+
   it('should prevent script xss with v-bind object syntax + array value', done => {
     renderVmWithOptions({
       data: {
@@ -977,6 +1155,24 @@ describe('SSR: renderToString', () => {
     })
   })
 
+  // #8977
+  it('should call computed properties with vm as first argument', done => {
+    renderToString(new Vue({
+      data: {
+        firstName: 'Evan',
+        lastName: 'You'
+      },
+      computed: {
+        fullName: ({ firstName, lastName }) => `${firstName} ${lastName}`,
+      },
+      template: '<div>{{ fullName }}</div>',
+    }), (err, result) => {
+      expect(err).toBeNull()
+      expect(result).toContain('<div data-server-rendered="true">Evan You</div>')
+      done()
+    })
+  })
+
   it('return Promise', done => {
     renderToString(new Vue({
       template: `<div>{{ foo }}</div>`,
@@ -1003,7 +1199,7 @@ describe('SSR: renderToString', () => {
   it('should catch template compilation error', done => {
     renderToString(new Vue({
       template: `<div></div><div></div>`
-    }), (err, res) => {
+    }), (err) => {
       expect(err.toString()).toContain('Component template should contain exactly one root element')
       done()
     })
@@ -1145,6 +1341,331 @@ describe('SSR: renderToString', () => {
       done()
     })
   })
+
+  // #7859
+  it('should not double escape class values', done => {
+    renderVmWithOptions({
+      template: `
+      <div>
+        <div class="a\nb"></div>
+      </div>
+      `
+    }, result => {
+      expect(result).toContain(`<div class="a b"></div>`)
+      done()
+    })
+  })
+
+  it('should expose ssr helpers on functional context', done => {
+    let called = false
+    renderVmWithOptions({
+      template: `<div><foo/></div>`,
+      components: {
+        foo: {
+          functional: true,
+          render (h, ctx) {
+            expect(ctx._ssrNode).toBeTruthy()
+            called = true
+          }
+        }
+      }
+    }, () => {
+      expect(called).toBe(true)
+      done()
+    })
+  })
+
+  it('should support serverPrefetch option', done => {
+    renderVmWithOptions({
+      template: `
+        <div>{{ count }}</div>
+      `,
+      data: {
+        count: 0
+      },
+      serverPrefetch () {
+        return new Promise((resolve) => {
+          setTimeout(() => {
+            this.count = 42
+            resolve()
+          }, 1)
+        })
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true">42</div>')
+      done()
+    })
+  })
+
+  it('should support serverPrefetch option (nested)', done => {
+    renderVmWithOptions({
+      template: `
+        <div>
+          <span>{{ count }}</span>
+          <nested-prefetch></nested-prefetch>
+        </div>
+      `,
+      data: {
+        count: 0
+      },
+      serverPrefetch () {
+        return new Promise((resolve) => {
+          setTimeout(() => {
+            this.count = 42
+            resolve()
+          }, 1)
+        })
+      },
+      components: {
+        nestedPrefetch: {
+          template: `
+            <div>{{ message }}</div>
+          `,
+          data () {
+            return {
+              message: ''
+            }
+          },
+          serverPrefetch () {
+            return new Promise((resolve) => {
+              setTimeout(() => {
+                this.message = 'vue.js'
+                resolve()
+              }, 1)
+            })
+          }
+        }
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true"><span>42</span> <div>vue.js</div></div>')
+      done()
+    })
+  })
+
+  it('should support serverPrefetch option (nested async)', done => {
+    renderVmWithOptions({
+      template: `
+        <div>
+          <span>{{ count }}</span>
+          <nested-prefetch></nested-prefetch>
+        </div>
+      `,
+      data: {
+        count: 0
+      },
+      serverPrefetch () {
+        return new Promise((resolve) => {
+          setTimeout(() => {
+            this.count = 42
+            resolve()
+          }, 1)
+        })
+      },
+      components: {
+        nestedPrefetch (resolve) {
+          resolve({
+            template: `
+              <div>{{ message }}</div>
+            `,
+            data () {
+              return {
+                message: ''
+              }
+            },
+            serverPrefetch () {
+              return new Promise((resolve) => {
+                setTimeout(() => {
+                  this.message = 'vue.js'
+                  resolve()
+                }, 1)
+              })
+            }
+          })
+        }
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true"><span>42</span> <div>vue.js</div></div>')
+      done()
+    })
+  })
+
+  it('should merge serverPrefetch option', done => {
+    const mixin = {
+      data: {
+        message: ''
+      },
+      serverPrefetch () {
+        return new Promise((resolve) => {
+          setTimeout(() => {
+            this.message = 'vue.js'
+            resolve()
+          }, 1)
+        })
+      }
+    }
+    renderVmWithOptions({
+      mixins: [mixin],
+      template: `
+        <div>
+          <span>{{ count }}</span>
+          <div>{{ message }}</div>
+        </div>
+      `,
+      data: {
+        count: 0
+      },
+      serverPrefetch () {
+        return new Promise((resolve) => {
+          setTimeout(() => {
+            this.count = 42
+            resolve()
+          }, 1)
+        })
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true"><span>42</span> <div>vue.js</div></div>')
+      done()
+    })
+  })
+
+  it(`should skip serverPrefetch option that doesn't return a promise`, done => {
+    renderVmWithOptions({
+      template: `
+        <div>{{ count }}</div>
+      `,
+      data: {
+        count: 0
+      },
+      serverPrefetch () {
+        setTimeout(() => {
+          this.count = 42
+        }, 1)
+      }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true">0</div>')
+      done()
+    })
+  })
+
+  it('should call context.rendered', done => {
+    let a = 0
+    renderToString(new Vue({
+      template: '<div>Hello</div>'
+    }), {
+      rendered: () => {
+        a = 42
+      }
+    }, (err, res) => {
+      expect(err).toBeNull()
+      expect(res).toContain('<div data-server-rendered="true">Hello</div>')
+      expect(a).toBe(42)
+      done()
+    })
+  })
+
+  it('invalid style value', done => {
+    renderVmWithOptions({
+      template: '<div :style="style"><p :style="style2"/></div>',
+      data: {
+        // all invalid, should not even have "style" attribute
+        style: {
+          opacity: {},
+          color: null
+        },
+        // mix of valid and invalid
+        style2: {
+          opacity: 0,
+          color: null
+        }
+      }
+    }, result => {
+      expect(result).toContain(
+        '<div data-server-rendered="true"><p style="opacity:0;"></p></div>'
+      )
+      done()
+    })
+  })
+
+  it('numeric style value', done => {
+    renderVmWithOptions({
+      template: '<div :style="style"></div>',
+      data: {
+        style: {
+          opacity: 0, // valid, opacity is unit-less
+          top: 0, // valid, top requires unit but 0 is allowed
+          left: 10, // invalid, left requires a unit
+          marginTop: '10px' // valid
+        }
+      }
+    }, result => {
+      expect(result).toContain(
+        '<div data-server-rendered="true" style="opacity:0;top:0;margin-top:10px;"></div>'
+      )
+      done()
+    })
+  })
+
+  it('handling max stack size limit', done => {
+    const vueInstance = new Vue({
+      template: `<div class="root">
+        <child v-for="(x, i) in items" :key="i"></child>
+      </div>`,
+      components: {
+        child: {
+          template: '<div class="child"><span class="child">hi</span></div>'
+        }
+      },
+      data: {
+        items: Array(1000).fill(0)
+      }
+    })
+
+    renderToString(vueInstance, err => done(err))
+  })
+
+  it('undefined v-model with textarea', done => {
+    renderVmWithOptions({
+      render (h) {
+        return h('div', [
+          h('textarea', {
+            domProps: {
+              value: null
+            }
+          })
+        ])
+      }
+    }, result => {
+      expect(result).toContain(
+        '<div data-server-rendered="true"><textarea></textarea></div>'
+      )
+      done()
+    })
+  })
+
+  it('Options inheritAttrs in parent component', done => {
+    const childComponent = {
+      template: `<div>{{ someProp }}</div>`,
+      props: {
+        someProp: {}
+      },
+    }
+    const parentComponent = {
+      template: `<childComponent v-bind="$attrs" />`,
+      components: { childComponent },
+      inheritAttrs: false
+    }
+    renderVmWithOptions({
+      template: `
+        <div>
+          <parentComponent some-prop="some-val" />
+        </div>
+        `,
+      components: { parentComponent }
+    }, result => {
+      expect(result).toContain('<div data-server-rendered="true"><div>some-val</div></div>')
+      done()
+    })
+  })
 })
 
 function renderVmWithOptions (options, cb) {
diff --git a/test/ssr/ssr-template.spec.js b/test/ssr/ssr-template.spec.js
index d93528466bb..d30f096668a 100644
--- a/test/ssr/ssr-template.spec.js
+++ b/test/ssr/ssr-template.spec.js
@@ -1,4 +1,3 @@
-import webpack from 'webpack'
 import Vue from '../../dist/vue.runtime.common.js'
 import { compileWithWebpack } from './compile-with-webpack'
 import { createRenderer } from '../../packages/vue-server-renderer'
@@ -12,13 +11,15 @@ function generateClientManifest (file, cb) {
   compileWithWebpack(file, {
     output: {
       path: '/',
+      publicPath: '/',
       filename: '[name].js'
     },
+    optimization: {
+      runtimeChunk: {
+        name: 'manifest'
+      }
+    },
     plugins: [
-      new webpack.optimize.CommonsChunkPlugin({
-        name: 'manifest',
-        minChunks: Infinity
-      }),
       new VueSSRClientPlugin()
     ]
   }, fs => {
@@ -98,6 +99,103 @@ describe('SSR: template option', () => {
     })
   })
 
+  it('renderToString with interpolation and context.rendered', done => {
+    const renderer = createRenderer({
+      template: interpolateTemplate
+    })
+
+    const context = {
+      title: '<script>hacks</script>',
+      snippet: '<div>foo</div>',
+      head: '<meta name="viewport" content="width=device-width">',
+      styles: '<style>h1 { color: red }</style>',
+      state: { a: 0 },
+      rendered: context => {
+        context.state.a = 1
+      }
+    }
+
+    renderer.renderToString(new Vue({
+      template: '<div>hi</div>'
+    }), context, (err, res) => {
+      expect(err).toBeNull()
+      expect(res).toContain(
+        `<html><head>` +
+        // double mustache should be escaped
+        `<title>&lt;script&gt;hacks&lt;/script&gt;</title>` +
+        `${context.head}${context.styles}</head><body>` +
+        `<div data-server-rendered="true">hi</div>` +
+        `<script>window.__INITIAL_STATE__={"a":1}</script>` +
+        // triple should be raw
+        `<div>foo</div>` +
+        `</body></html>`
+      )
+      done()
+    })
+  })
+
+  it('renderToString w/ template function', done => {
+    const renderer = createRenderer({
+      template: (content, context) => `<html><head>${context.head}</head>${content}</html>`
+    })
+
+    const context = {
+      head: '<meta name="viewport" content="width=device-width">'
+    }
+
+    renderer.renderToString(new Vue({
+      template: '<div>hi</div>'
+    }), context, (err, res) => {
+      expect(err).toBeNull()
+      expect(res).toContain(`<html><head>${context.head}</head><div data-server-rendered="true">hi</div></html>`)
+      done()
+    })
+  })
+
+  it('renderToString w/ template function returning Promise', done => {
+    const renderer = createRenderer({
+      template: (content, context) => new Promise((resolve) => {
+        setTimeout(() => {
+          resolve(`<html><head>${context.head}</head>${content}</html>`)
+        }, 0)
+      })
+    })
+
+    const context = {
+      head: '<meta name="viewport" content="width=device-width">'
+    }
+
+    renderer.renderToString(new Vue({
+      template: '<div>hi</div>'
+    }), context, (err, res) => {
+      expect(err).toBeNull()
+      expect(res).toContain(`<html><head>${context.head}</head><div data-server-rendered="true">hi</div></html>`)
+      done()
+    })
+  })
+
+  it('renderToString w/ template function returning Promise w/ rejection', done => {
+    const renderer = createRenderer({
+      template: () => new Promise((resolve, reject) => {
+        setTimeout(() => {
+          reject(new Error(`foo`))
+        }, 0)
+      })
+    })
+
+    const context = {
+      head: '<meta name="viewport" content="width=device-width">'
+    }
+
+    renderer.renderToString(new Vue({
+      template: '<div>hi</div>'
+    }), context, (err, res) => {
+      expect(err.message).toBe(`foo`)
+      expect(res).toBeUndefined()
+      done()
+    })
+  })
+
   it('renderToStream', done => {
     const renderer = createRenderer({
       template: defaultTemplate
@@ -165,6 +263,46 @@ describe('SSR: template option', () => {
     })
   })
 
+  it('renderToStream with interpolation and context.rendered', done => {
+    const renderer = createRenderer({
+      template: interpolateTemplate
+    })
+
+    const context = {
+      title: '<script>hacks</script>',
+      snippet: '<div>foo</div>',
+      head: '<meta name="viewport" content="width=device-width">',
+      styles: '<style>h1 { color: red }</style>',
+      state: { a: 0 },
+      rendered: context => {
+        context.state.a = 1
+      }
+    }
+
+    const stream = renderer.renderToStream(new Vue({
+      template: '<div>hi</div>'
+    }), context)
+
+    let res = ''
+    stream.on('data', chunk => {
+      res += chunk
+    })
+    stream.on('end', () => {
+      expect(res).toContain(
+        `<html><head>` +
+        // double mustache should be escaped
+        `<title>&lt;script&gt;hacks&lt;/script&gt;</title>` +
+        `${context.head}${context.styles}</head><body>` +
+        `<div data-server-rendered="true">hi</div>` +
+        `<script>window.__INITIAL_STATE__={"a":1}</script>` +
+        // triple should be raw
+        `<div>foo</div>` +
+        `</body></html>`
+      )
+      done()
+    })
+  })
+
   it('bundleRenderer + renderToString', done => {
     createBundleRenderer('app.js', {
       asBundle: true,
@@ -227,8 +365,8 @@ describe('SSR: template option', () => {
       `<link rel="preload" href="/0.js" as="script">` +
       `<link rel="preload" href="/test.css" as="style">` +
       // images and fonts are only preloaded when explicitly asked for
-      (options.preloadOtherAssets ? `<link rel="preload" href="/test.woff2" as="font" type="font/woff2" crossorigin>` : ``) +
       (options.preloadOtherAssets ? `<link rel="preload" href="/test.png" as="image">` : ``) +
+      (options.preloadOtherAssets ? `<link rel="preload" href="/test.woff2" as="font" type="font/woff2" crossorigin>` : ``) +
       // unused chunks should have prefetch
       (options.noPrefetch ? `` : `<link rel="prefetch" href="/1.js">`) +
       // css assets should be loaded
@@ -386,5 +524,54 @@ describe('SSR: template option', () => {
         done()
       })
     })
+
+    it('renderToString + nonce', done => {
+      const interpolateTemplate = `<html><head><title>hello</title></head><body><!--vue-ssr-outlet--></body></html>`
+      const renderer = createRenderer({
+        template: interpolateTemplate
+      })
+
+      const context = {
+        state: { a: 1 },
+        nonce: '4AEemGb0xJptoIGFP3Nd'
+      }
+
+      renderer.renderToString(new Vue({
+        template: '<div>hi</div>'
+      }), context, (err, res) => {
+        expect(err).toBeNull()
+        expect(res).toContain(
+          `<html><head>` +
+          `<title>hello</title>` +
+          `</head><body>` +
+          `<div data-server-rendered="true">hi</div>` +
+          `<script nonce="4AEemGb0xJptoIGFP3Nd">window.__INITIAL_STATE__={"a":1}</script>` +
+          `</body></html>`
+        )
+        done()
+      })
+    })
+
+    it('renderToString + custom serializer', done => {
+      const expected = `{"foo":123}`
+      const renderer = createRenderer({
+        template: defaultTemplate,
+        serializer: () => expected
+      })
+
+      const context = {
+        state: { a: 1 }
+      }
+
+      renderer.renderToString(new Vue({
+        template: '<div>hi</div>'
+      }), context, (err, res) => {
+        expect(err).toBeNull()
+        expect(res).toContain(
+          `<script>window.__INITIAL_STATE__=${expected}</script>`
+        )
+        done()
+      })
+    })
   }
 })
diff --git a/test/unit/.eslintrc b/test/unit/.eslintrc.json
similarity index 75%
rename from test/unit/.eslintrc
rename to test/unit/.eslintrc.json
index 8334c32a015..d1ccc04e195 100644
--- a/test/unit/.eslintrc
+++ b/test/unit/.eslintrc.json
@@ -9,6 +9,7 @@
   },
   "plugins": ["jasmine"],
   "rules": {
-    "jasmine/no-focused-tests": 2
+    "jasmine/no-focused-tests": 2,
+    "no-unused-vars": 0
   }
 }
diff --git a/test/unit/features/component/component-async.spec.js b/test/unit/features/component/component-async.spec.js
index 889cb7145eb..8ce085de313 100644
--- a/test/unit/features/component/component-async.spec.js
+++ b/test/unit/features/component/component-async.spec.js
@@ -2,6 +2,42 @@ import Vue from 'vue'
 import { Promise } from 'es6-promise'
 
 describe('Component async', () => {
+
+  const oldSetTimeout = window.setTimeout;
+  const oldClearTimeout = window.clearTimeout;
+
+  // will contain pending timeouts set during the test iteration
+  // will contain the id of the timeout as the key, and the millisecond timeout as the value
+  // this helps to identify the timeout that is still pending
+  let timeoutsPending = {};
+
+  beforeEach(function () {
+    // reset the timeouts for this iteration
+    timeoutsPending = {};
+
+    window.setTimeout = function(func, delay) {
+      let id = oldSetTimeout(function() {
+        delete timeoutsPending[id];
+        func();
+      }, delay);
+      timeoutsPending[id] = delay;
+      return id
+    };
+
+    window.clearTimeout = function(id) {
+      oldClearTimeout(id);
+      delete timeoutsPending[id];
+    };
+  })
+
+  afterEach(function () {
+    window.setTimeout = oldSetTimeout;
+    window.clearTimeout = oldClearTimeout;
+    // after the test is complete no timeouts that have been set up during the test should still be active
+    // compare stringified JSON for better error message containing ID and millisecond timeout
+    expect(JSON.stringify(timeoutsPending)).toEqual(JSON.stringify({}))
+  })
+
   it('normal', done => {
     const vm = new Vue({
       template: '<div><test></test></div>',
@@ -79,7 +115,7 @@ describe('Component async', () => {
   })
 
   it('dynamic', done => {
-    var vm = new Vue({
+    const vm = new Vue({
       template: '<component :is="view"></component>',
       data: {
         view: 'view-a'
@@ -103,7 +139,7 @@ describe('Component async', () => {
         }
       }
     }).$mount()
-    var aCalled = false
+    let aCalled = false
     function step1 () {
       // ensure A is resolved only once
       expect(aCalled).toBe(false)
@@ -343,6 +379,34 @@ describe('Component async', () => {
       }, 50)
     })
 
+    it('should not have running timeout/loading if resolved', done => {
+      const vm = new Vue({
+        template: `<div><test/></div>`,
+        components: {
+          test: () => ({
+            component: new Promise((resolve, reject) => {
+              setTimeout(() => {
+                resolve({ template: '<div>hi</div>' })
+                Promise.resolve().then(() => {
+                  Vue.nextTick(next)
+                })
+              }, 10)
+            }),
+            loading: { template: `<div>loading</div>` },
+            delay: 30,
+            error: { template: `<div>error</div>` },
+            timeout: 40
+          })
+        }
+      }).$mount()
+
+      function next () {
+        expect(vm.$el.textContent).toBe('hi')
+        // the afterEach() will ensure that the timeouts for delay and timeout have been cleared
+        done()
+      }
+    })
+
     // #7107
     it(`should work when resolving sync in sibling component's mounted hook`, done => {
       let resolveTwo
diff --git a/test/unit/features/component/component-keep-alive.spec.js b/test/unit/features/component/component-keep-alive.spec.js
index b89fbdc9d65..9d30d2c7d58 100644
--- a/test/unit/features/component/component-keep-alive.spec.js
+++ b/test/unit/features/component/component-keep-alive.spec.js
@@ -140,7 +140,7 @@ describe('Component keep-alive', () => {
       components
     }).$mount()
 
-    var oneInstance = vm.$refs.one
+    const oneInstance = vm.$refs.one
     expect(vm.$el.textContent).toBe('two')
     assertHookCalls(one, [1, 1, 1, 0, 0])
     assertHookCalls(two, [1, 1, 1, 0, 0])
@@ -393,6 +393,35 @@ describe('Component keep-alive', () => {
     }).then(done)
   })
 
+  it('prune cache on include/exclude change + view switch', done => {
+    const vm = new Vue({
+      template: `
+        <div>
+          <keep-alive :include="include">
+            <component :is="view"></component>
+          </keep-alive>
+        </div>
+      `,
+      data: {
+        view: 'one',
+        include: 'one,two'
+      },
+      components
+    }).$mount()
+
+    vm.view = 'two'
+    waitForUpdate(() => {
+      assertHookCalls(one, [1, 1, 1, 1, 0])
+      assertHookCalls(two, [1, 1, 1, 0, 0])
+      vm.include = 'one'
+      vm.view = 'one'
+    }).then(() => {
+      assertHookCalls(one, [1, 1, 2, 1, 0])
+      // two should be pruned
+      assertHookCalls(two, [1, 1, 1, 1, 1])
+    }).then(done)
+  })
+
   it('should not prune currently active instance', done => {
     const vm = new Vue({
       template: `
@@ -543,6 +572,73 @@ describe('Component keep-alive', () => {
     }).then(done)
   })
 
+  it('max=1', done => {
+    const spyA = jasmine.createSpy()
+    const spyB = jasmine.createSpy()
+    const spyC = jasmine.createSpy()
+    const spyAD = jasmine.createSpy()
+    const spyBD = jasmine.createSpy()
+    const spyCD = jasmine.createSpy()
+
+    function assertCount (calls) {
+      expect([
+        spyA.calls.count(),
+        spyAD.calls.count(),
+        spyB.calls.count(),
+        spyBD.calls.count(),
+        spyC.calls.count(),
+        spyCD.calls.count()
+      ]).toEqual(calls)
+    }
+
+    const vm = new Vue({
+      template: `
+        <keep-alive max="1">
+          <component :is="n"></component>
+        </keep-alive>
+      `,
+      data: {
+        n: 'aa'
+      },
+      components: {
+        aa: {
+          template: '<div>a</div>',
+          created: spyA,
+          destroyed: spyAD
+        },
+        bb: {
+          template: '<div>bbb</div>',
+          created: spyB,
+          destroyed: spyBD
+        },
+        cc: {
+          template: '<div>ccc</div>',
+          created: spyC,
+          destroyed: spyCD
+        }
+      }
+    }).$mount()
+
+    assertCount([1, 0, 0, 0, 0, 0])
+    vm.n = 'bb'
+    waitForUpdate(() => {
+      // should prune A because max cache reached
+      assertCount([1, 1, 1, 0, 0, 0])
+      vm.n = 'cc'
+    }).then(() => {
+      // should prune B because max cache reached
+      assertCount([1, 1, 1, 1, 1, 0])
+      vm.n = 'bb'
+    }).then(() => {
+      // B is recreated
+      assertCount([1, 1, 2, 1, 1, 1])
+      vm.n = 'aa'
+    }).then(() => {
+      // B is destroyed and A recreated
+      assertCount([2, 1, 2, 2, 1, 1])
+    }).then(done)
+  })
+
   it('should warn unknown component inside', () => {
     new Vue({
       template: `<keep-alive><foo/></keep-alive>`
@@ -1153,5 +1249,37 @@ describe('Component keep-alive', () => {
         }).then(done)
       }
     })
+
+    // #10083
+    it('should not attach event handler repeatedly', done => {
+      const vm = new Vue({
+        template: `
+          <keep-alive>
+            <btn v-if="showBtn" @click.native="add" />
+          </keep-alive>
+        `,
+        data: { showBtn: true, n: 0 },
+        methods: {
+          add () {
+            this.n++
+          }
+        },
+        components: {
+          btn: { template: '<button>add 1</button>' }
+        }
+      }).$mount()
+
+      const btn = vm.$el
+      expect(vm.n).toBe(0)
+      btn.click()
+      expect(vm.n).toBe(1)
+      vm.showBtn = false
+      waitForUpdate(() => {
+        vm.showBtn = true
+      }).then(() => {
+        btn.click()
+        expect(vm.n).toBe(2)
+      }).then(done)
+    })
   }
 })
diff --git a/test/unit/features/component/component-scoped-slot.spec.js b/test/unit/features/component/component-scoped-slot.spec.js
index 4fab0127ea7..a77b055ccd6 100644
--- a/test/unit/features/component/component-scoped-slot.spec.js
+++ b/test/unit/features/component/component-scoped-slot.spec.js
@@ -395,11 +395,9 @@ describe('Component scoped slot', () => {
             return { msg: 'hello' }
           },
           render (h) {
-            return h('div', [
-              this.$scopedSlots.item({
-                text: this.msg
-              })
-            ])
+            return h('div', this.$scopedSlots.item({
+              text: this.msg
+            }))
           }
         }
       }
@@ -425,14 +423,54 @@ describe('Component scoped slot', () => {
             return { msg: 'hello' }
           },
           render (h) {
+            return h('div', this.$scopedSlots.default({ msg: this.msg }))
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.innerHTML).toBe('<span>hello</span>')
+  })
+
+  it('render function usage (default, as root)', () => {
+    const vm = new Vue({
+      render (h) {
+        return h('test', [
+          props => h('span', [props.msg])
+        ])
+      },
+      components: {
+        test: {
+          data () {
+            return { msg: 'hello' }
+          },
+          render (h) {
+            const res = this.$scopedSlots.default({ msg: this.msg })
+            // all scoped slots should be normalized into arrays
+            expect(Array.isArray(res)).toBe(true)
+            return res
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.outerHTML).toBe('<span>hello</span>')
+  })
+
+  // new in 2.6, unifying all slots as functions
+  it('non-scoped slots should also be available on $scopedSlots', () => {
+    const vm = new Vue({
+      template: `<foo>before <div slot="bar" slot-scope="scope">{{ scope.msg }}</div> after</foo>`,
+      components: {
+        foo: {
+          render(h) {
             return h('div', [
-              this.$scopedSlots.default({ msg: this.msg })
+              this.$scopedSlots.default(),
+              this.$scopedSlots.bar({ msg: 'hi' })
             ])
           }
         }
       }
     }).$mount()
-    expect(vm.$el.innerHTML).toBe('<span>hello</span>')
+    expect(vm.$el.innerHTML).toBe(`before  after<div>hi</div>`)
   })
 
   // #4779
@@ -593,4 +631,722 @@ describe('Component scoped slot', () => {
       expect(vm.$el.innerHTML).toBe('<p>hello</p>')
     }).then(done)
   })
+
+  // #9422
+  // the behavior of the new syntax is slightly different.
+  it('scoped slot v-if using slot-scope value', () => {
+    const Child = {
+      template: '<div><slot value="foo"/></div>',
+    }
+    const vm = new Vue({
+      components: { Child },
+      template: `
+        <child>
+          <template slot-scope="{ value }" v-if="value">
+            foo {{ value }}
+          </template>
+        </child>
+      `
+    }).$mount()
+    expect(vm.$el.textContent).toMatch(`foo foo`)
+  })
+
+  // 2.6 new slot syntax
+  describe('v-slot syntax', () => {
+    const Foo = {
+      render(h) {
+        return h('div', [
+          this.$scopedSlots.default && this.$scopedSlots.default('from foo default'),
+          this.$scopedSlots.one && this.$scopedSlots.one('from foo one'),
+          this.$scopedSlots.two && this.$scopedSlots.two('from foo two')
+        ])
+      }
+    }
+
+    const Bar = {
+      render(h) {
+        return this.$scopedSlots.default && this.$scopedSlots.default('from bar')
+      }
+    }
+
+    const Baz = {
+      render(h) {
+        return this.$scopedSlots.default && this.$scopedSlots.default('from baz')
+      }
+    }
+
+    const toNamed = (syntax, name) => syntax[0] === '#'
+      ? `#${name}` // shorthand
+      : `${syntax}:${name}` // full syntax
+
+    function runSuite(syntax) {
+      it('default slot', () => {
+        const vm = new Vue({
+          template: `<foo ${syntax}="foo">{{ foo }}<div>{{ foo }}</div></foo>`,
+          components: { Foo }
+        }).$mount()
+        expect(vm.$el.innerHTML).toBe(`from foo default<div>from foo default</div>`)
+      })
+
+      it('nested default slots', () => {
+        const vm = new Vue({
+          template: `
+            <foo ${syntax}="foo">
+              <bar ${syntax}="bar">
+                <baz ${syntax}="baz">
+                  {{ foo }} | {{ bar }} | {{ baz }}
+                </baz>
+              </bar>
+            </foo>
+          `,
+          components: { Foo, Bar, Baz }
+        }).$mount()
+        expect(vm.$el.innerHTML.trim()).toBe(`from foo default | from bar | from baz`)
+      })
+
+      it('named slots', () => {
+        const vm = new Vue({
+          template: `
+            <foo>
+              <template ${toNamed(syntax, 'default')}="foo">
+                {{ foo }}
+              </template>
+              <template ${toNamed(syntax, 'one')}="one">
+                {{ one }}
+              </template>
+              <template ${toNamed(syntax, 'two')}="two">
+                {{ two }}
+              </template>
+            </foo>
+          `,
+          components: { Foo }
+        }).$mount()
+        expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`from foo default from foo one from foo two`)
+      })
+
+      it('nested + named + default slots', () => {
+        const vm = new Vue({
+          template: `
+            <foo>
+              <template ${toNamed(syntax, 'one')}="one">
+                <bar ${syntax}="bar">
+                  {{ one }} {{ bar }}
+                </bar>
+              </template>
+              <template ${toNamed(syntax, 'two')}="two">
+                <baz ${syntax}="baz">
+                  {{ two }} {{ baz }}
+                </baz>
+              </template>
+            </foo>
+          `,
+          components: { Foo, Bar, Baz }
+        }).$mount()
+        expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`from foo one from bar from foo two from baz`)
+      })
+
+      it('should warn v-slot usage on non-component elements', () => {
+        const vm = new Vue({
+          template: `<div ${syntax}="foo"/>`
+        }).$mount()
+        expect(`v-slot can only be used on components or <template>`).toHaveBeenWarned()
+      })
+
+      it('should warn mixed usage', () => {
+        const vm = new Vue({
+          template: `<foo><bar slot="one" slot-scope="bar" ${syntax}="bar"></bar></foo>`,
+          components: { Foo, Bar }
+        }).$mount()
+        expect(`Unexpected mixed usage of different slot syntaxes`).toHaveBeenWarned()
+      })
+
+      it('should warn invalid parameter expression', () => {
+        new Vue({
+          template: `<foo ${syntax}="1"></foo>`,
+          components: { Foo }
+        }).$mount();
+        expect('invalid function parameter expression').toHaveBeenWarned()
+      })
+
+      it('should allow destructuring props with default value', () => {
+        new Vue({
+          template: `<foo ${syntax}="{ foo = { bar: '1' } }"></foo>`,
+          components: { Foo }
+        }).$mount();
+        expect('invalid function parameter expression').not.toHaveBeenWarned()
+      })
+    }
+
+    // run tests for both full syntax and shorthand
+    runSuite('v-slot')
+    runSuite('#default')
+
+    it('shorthand named slots', () => {
+      const vm = new Vue({
+        template: `
+          <foo>
+            <template #default="foo">
+              {{ foo }}
+            </template>
+            <template #one="one">
+              {{ one }}
+            </template>
+            <template #two="two">
+              {{ two }}
+            </template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`from foo default from foo one from foo two`)
+    })
+
+    it('should warn mixed root-default and named slots', () => {
+      const vm = new Vue({
+        template: `
+          <foo #default="foo">
+            {{ foo }}
+            <template #one="one">
+              {{ one }}
+            </template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(`default slot should also use <template>`).toHaveBeenWarned()
+    })
+
+    it('shorthand without scope variable', () => {
+      const vm = new Vue({
+        template: `
+          <foo>
+            <template #one>one</template>
+            <template #two>two</template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`onetwo`)
+    })
+
+    it('shorthand named slots on root', () => {
+      const vm = new Vue({
+        template: `
+          <foo #one="one">
+            {{ one }}
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`from foo one`)
+    })
+
+    it('dynamic slot name', done => {
+      const vm = new Vue({
+        data: {
+          a: 'one',
+          b: 'two'
+        },
+        template: `
+          <foo>
+            <template #[a]="one">a {{ one }} </template>
+            <template v-slot:[b]="two">b {{ two }} </template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`a from foo one b from foo two`)
+      vm.a = 'two'
+      vm.b = 'one'
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML.replace(/\s+/g, ' ')).toMatch(`b from foo one a from foo two `)
+      }).then(done)
+    })
+
+    it('should work with v-if/v-else', done => {
+      const vm = new Vue({
+        data: { flag: true },
+        template: `
+          <foo>
+            <template v-if="flag" v-slot:one="one">a {{ one }} </template>
+            <template v-else v-slot:two="two">b {{ two }} </template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe(`a from foo one `)
+      vm.flag = false
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML).toBe(`b from foo two `)
+      }).then(done)
+    })
+
+    it('warn when v-slot used on non-root <template>', () => {
+      const vm = new Vue({
+        template: `
+          <foo>
+            <template v-if="true">
+              <template v-slot:one>foo</template>
+            </template>
+          </foo>
+        `,
+        components: { Foo }
+      }).$mount()
+      expect(`<template v-slot> can only appear at the root level`).toHaveBeenWarned()
+    })
+  })
+
+  // 2.6 scoped slot perf optimization
+  it('should have accurate tracking for scoped slots', done => {
+    const parentUpdate = jasmine.createSpy()
+    const childUpdate = jasmine.createSpy()
+    const vm = new Vue({
+      template: `
+        <div>{{ parentCount }}<foo #default>{{ childCount }}</foo></div>
+      `,
+      data: {
+        parentCount: 0,
+        childCount: 0
+      },
+      updated: parentUpdate,
+      components: {
+        foo: {
+          template: `<div><slot/></div>`,
+          updated: childUpdate
+        }
+      }
+    }).$mount()
+    expect(vm.$el.innerHTML).toMatch(`0<div>0</div>`)
+
+    vm.parentCount++
+    waitForUpdate(() => {
+      expect(vm.$el.innerHTML).toMatch(`1<div>0</div>`)
+      // should only trigger parent update
+      expect(parentUpdate.calls.count()).toBe(1)
+      expect(childUpdate.calls.count()).toBe(0)
+
+      vm.childCount++
+    }).then(() => {
+      expect(vm.$el.innerHTML).toMatch(`1<div>1</div>`)
+      // should only trigger child update
+      expect(parentUpdate.calls.count()).toBe(1)
+      expect(childUpdate.calls.count()).toBe(1)
+    }).then(done)
+  })
+
+  // #9432: async components inside a scoped slot should trigger update of the
+  // component that invoked the scoped slot, not the lexical context component.
+  it('async component inside scoped slot', done => {
+    let p
+    const vm = new Vue({
+      template: `
+        <foo>
+          <template #default>
+            <bar />
+          </template>
+        </foo>
+      `,
+      components: {
+        foo: {
+          template: `<div>foo<slot/></div>`
+        },
+        bar: resolve => {
+          setTimeout(() => {
+            resolve({
+              template: `<div>bar</div>`
+            })
+            next()
+          }, 0)
+        }
+      }
+    }).$mount()
+
+    function next () {
+      waitForUpdate(() => {
+        expect(vm.$el.textContent).toBe(`foobar`)
+      }).then(done)
+    }
+  })
+
+  // regression #9396
+  it('should not force update child with no slot content', done => {
+    const Child = {
+      updated: jasmine.createSpy(),
+      template: `<div></div>`
+    }
+
+    const parent = new Vue({
+      template: `<div>{{ count }}<child/></div>`,
+      data: {
+        count: 0
+      },
+      components: { Child }
+    }).$mount()
+
+    expect(parent.$el.textContent).toBe(`0`)
+    parent.count++
+    waitForUpdate(() => {
+      expect(parent.$el.textContent).toBe(`1`)
+      expect(Child.updated).not.toHaveBeenCalled()
+    }).then(done)
+  })
+
+  // regression #9438
+  it('nested scoped slots update', done => {
+    const Wrapper = {
+      template: `<div><slot/></div>`
+    }
+
+    const Inner = {
+      props: ['foo'],
+      template: `<div>{{ foo }}</div>`
+    }
+
+    const Outer = {
+      data: () => ({ foo: 1 }),
+      template: `<div><slot :foo="foo" /></div>`
+    }
+
+    const vm = new Vue({
+      components: { Outer, Wrapper, Inner },
+      template: `
+        <outer ref="outer" v-slot="props">
+          <wrapper v-slot>
+            <inner :foo="props.foo"/>
+          </wrapper>
+        </outer>
+      `
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe(`1`)
+
+    vm.$refs.outer.foo++
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe(`2`)
+    }).then(done)
+  })
+
+  it('dynamic v-bind arguments on <slot>', done => {
+    const Foo = {
+      data() {
+        return {
+          key: 'msg'
+        }
+      },
+      template: `<div><slot :[key]="'hello'"/></div>`
+    }
+
+    const vm = new Vue({
+      components: { Foo },
+      template: `
+        <foo ref="foo" v-slot="props">{{ props }}</foo>
+      `
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe(JSON.stringify({ msg: 'hello' }, null, 2))
+
+    vm.$refs.foo.key = 'changed'
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe(JSON.stringify({ changed: 'hello' }, null, 2))
+    }).then(done)
+  })
+
+  // #9452
+  it('fallback for scoped slots passed multiple levels down', () => {
+    const inner = {
+      template: `<div><slot>fallback</slot></div>`
+    }
+
+    const wrapper = {
+      template: `
+        <inner>
+          <template #default>
+            <slot/>
+          </template>
+        </inner>
+      `,
+      components: { inner }
+    }
+
+    const vm = new Vue({
+      components: { wrapper, inner },
+      template: `<wrapper/>`
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe(`fallback`)
+  })
+
+  it('should expose v-slot without scope on this.$slots', () => {
+    const vm = new Vue({
+      template: `<foo><template v-slot>hello</template></foo>`,
+      components: {
+        foo: {
+          render(h) {
+            return h('div', this.$slots.default)
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('hello')
+  })
+
+  it('should not expose legacy syntax scoped slot on this.$slots', () => {
+    const vm = new Vue({
+      template: `<foo><template slot-scope="foo">hello</template></foo>`,
+      components: {
+        foo: {
+          render(h) {
+            expect(this.$slots.default).toBeUndefined()
+            return h('div', this.$slots.default)
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('')
+  })
+
+  it('should expose v-slot without scope on ctx.slots() in functional', () => {
+    const vm = new Vue({
+      template: `<foo><template v-slot>hello</template></foo>`,
+      components: {
+        foo: {
+          functional: true,
+          render(h, ctx) {
+            return h('div', ctx.slots().default)
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('hello')
+  })
+
+  it('should not cache scoped slot normalization when there are a mix of normal and scoped slots', done => {
+    const foo = {
+      template: `<div><slot name="foo" /> <slot name="bar" /></div>`
+    }
+
+    const vm = new Vue({
+      data: {
+        msg: 'foo'
+      },
+      template: `
+        <foo>
+          <div slot="foo">{{ msg }}</div>
+          <template #bar><div>bar</div></template>
+        </foo>
+      `,
+      components: { foo }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe(`foo bar`)
+    vm.msg = 'baz'
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe(`baz bar`)
+    }).then(done)
+  })
+
+  // #9468
+  it('should support passing multiple args to scoped slot function', () => {
+    const foo = {
+      render() {
+        return this.$scopedSlots.default('foo', 'bar')
+      }
+    }
+
+    const vm = new Vue({
+      template: `<foo v-slot="foo, bar">{{ foo }} {{ bar }}</foo>`,
+      components: { foo }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('foo bar')
+  })
+
+  it('should not skip updates when a scoped slot contains parent <slot/> content', done => {
+    const inner = {
+      template: `<div><slot/></div>`
+    }
+
+    const wrapper = {
+      template: `<inner v-slot><slot/></inner>`,
+      components: { inner }
+    }
+
+    const vm = new Vue({
+      data() {
+        return {
+          ok: true
+        }
+      },
+      components: { wrapper },
+      template: `<wrapper><div>{{ ok ? 'foo' : 'bar' }}</div></wrapper>`
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('foo')
+    vm.ok = false
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe('bar')
+    }).then(done)
+  })
+
+  it('should not skip updates for v-slot inside v-for', done => {
+    const test = {
+      template: `<div><slot></slot></div>`
+    }
+
+    const vm = new Vue({
+      template: `
+      <div>
+        <div v-for="i in numbers">
+          <test v-slot>{{ i }}</test>
+        </div>
+      </div>
+      `,
+      components: { test },
+      data: {
+        numbers: [1]
+      }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe(`1`)
+    vm.numbers = [2]
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe(`2`)
+    }).then(done)
+  })
+
+  // #9534
+  it('should detect conditional reuse with different slot content', done => {
+    const Foo = {
+      template: `<div><slot :n="1" /></div>`
+    }
+
+    const vm = new Vue({
+      components: { Foo },
+      data: {
+        ok: true
+      },
+      template: `
+        <div>
+          <div v-if="ok">
+            <foo v-slot="{ n }">{{ n }}</foo>
+          </div>
+          <div v-if="!ok">
+            <foo v-slot="{ n }">{{ n + 1 }}</foo>
+          </div>
+        </div>
+      `
+    }).$mount()
+
+    expect(vm.$el.textContent.trim()).toBe(`1`)
+    vm.ok = false
+    waitForUpdate(() => {
+      expect(vm.$el.textContent.trim()).toBe(`2`)
+    }).then(done)
+  })
+
+  // #9644
+  it('should factor presence of normal slots into scoped slots caching', done => {
+    const Wrapper = {
+      template: `<div>
+        <p>Default:<slot/></p>
+        <p>Content:<slot name='content'/></p>
+      </div>`
+    }
+
+    const vm = new Vue({
+      data: { ok: false },
+      components: { Wrapper },
+      template: `<wrapper>
+        <p v-if='ok'>ok</p>
+        <template #content>
+          <p v-if='ok'>ok</p>
+        </template>
+      </wrapper>`
+    }).$mount()
+
+    expect(vm.$el.textContent).not.toMatch(`Default:ok`)
+    expect(vm.$el.textContent).not.toMatch(`Content:ok`)
+    vm.ok = true
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toMatch(`Default:ok`)
+      expect(vm.$el.textContent).toMatch(`Content:ok`)
+      vm.ok = false
+    }).then(() => {
+      expect(vm.$el.textContent).not.toMatch(`Default:ok`)
+      expect(vm.$el.textContent).not.toMatch(`Content:ok`)
+      vm.ok = true
+    }).then(() => {
+      expect(vm.$el.textContent).toMatch(`Default:ok`)
+      expect(vm.$el.textContent).toMatch(`Content:ok`)
+    }).then(done)
+  })
+
+  //#9658
+  it('fallback for scoped slot with single v-if', () => {
+    const vm = new Vue({
+      template: `<test v-slot><template v-if="false">hi</template></test>`,
+      components: {
+        Test: {
+          template: `<div><slot>fallback</slot></div>`
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toMatch('fallback')
+  })
+
+  // #9699
+  // Component only has normal slots, but is passing down $scopedSlots directly
+  // $scopedSlots should not be marked as stable in this case
+  it('render function passing $scopedSlots w/ normal slots down', done => {
+    const one = {
+      template: `<div><slot name="footer"/></div>`
+    }
+
+    const two = {
+      render(h) {
+        return h(one, {
+          scopedSlots: this.$scopedSlots
+        })
+      }
+    }
+
+    const vm = new Vue({
+      data: { count: 0 },
+      render(h) {
+        return h(two, [
+          h('span', { slot: 'footer' }, this.count)
+        ])
+      }
+    }).$mount()
+
+    expect(vm.$el.textContent).toMatch(`0`)
+    vm.count++
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toMatch(`1`)
+    }).then(done)
+  })
+
+  // #11652
+  it('should update when switching between two components with slot and without slot', done => {
+    const Child = {
+      template: `<div><slot/></div>`
+    }
+
+    const parent = new Vue({
+      template: `<div>
+        <child v-if="flag"><template #default>foo</template></child>
+        <child v-else></child>
+      </div>`,
+      data: {
+        flag: true
+      },
+      components: { Child }
+    }).$mount()
+
+    expect(parent.$el.textContent).toMatch(`foo`)
+    parent.flag=false
+    waitForUpdate(()=>{
+      expect(parent.$el.textContent).toMatch(``)
+    }).then(done)
+  })
 })
diff --git a/test/unit/features/component/component-slot.spec.js b/test/unit/features/component/component-slot.spec.js
index 28d6555ee65..4412a1f0c7d 100644
--- a/test/unit/features/component/component-slot.spec.js
+++ b/test/unit/features/component/component-slot.spec.js
@@ -109,6 +109,47 @@ describe('Component slot', () => {
     expect(child.$el.children[1].textContent).toBe('slot b')
   })
 
+ it('it should work with previous versions of the templates', () => {
+   const Test = {
+      render() {
+        var _vm = this;
+        var _h = _vm.$createElement;
+        var _c = _vm._self._c || vm._h;
+        return _c('div', [_vm._t("default", [_c('p', [_vm._v("slot default")])])], 2)
+      }
+    }
+    let vm = new Vue({
+      template: `<test/>`,
+      components: { Test }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('slot default')
+    vm = new Vue({
+      template: `<test>custom content</test>`,
+      components: { Test }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('custom content')
+  })
+
+  it('fallback content should not be evaluated when the parent is providing it', () => {
+    const test = jasmine.createSpy('test')
+    const vm = new Vue({
+      template: '<test>slot default</test>',
+      components: {
+        test: {
+          template: '<div><slot>{{test()}}</slot></div>',
+          methods: {
+            test () {
+              test()
+              return 'test'
+            }
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('slot default')
+    expect(test).not.toHaveBeenCalled()
+  })
+
   it('selector matching multiple elements', () => {
     mount({
       childTemplate: '<div><slot name="t"></slot></div>',
@@ -327,11 +368,11 @@ describe('Component slot', () => {
 
   it('warn if user directly returns array', () => {
     new Vue({
-      template: '<test><div></div></test>',
+      template: '<test><div slot="foo"></div><div slot="foo"></div></test>',
       components: {
         test: {
           render () {
-            return this.$slots.default
+            return this.$slots.foo
           }
         }
       }
@@ -482,44 +523,46 @@ describe('Component slot', () => {
     }).then(done)
   })
 
-  it('warn duplicate slots', () => {
-    new Vue({
-      template: `<div>
-        <test>
-          <div>foo</div>
-          <div slot="a">bar</div>
-        </test>
-      </div>`,
-      components: {
-        test: {
-          template: `<div>
-            <slot></slot><slot></slot>
-            <div v-for="i in 3"><slot name="a"></slot></div>
-          </div>`
-        }
-      }
-    }).$mount()
-    expect('Duplicate presence of slot "default"').toHaveBeenWarned()
-    expect('Duplicate presence of slot "a"').toHaveBeenWarned()
-  })
-
-  it('should not warn valid conditional slots', () => {
-    new Vue({
-      template: `<div>
-        <test>
-          <div>foo</div>
-        </test>
-      </div>`,
+  it('should support duplicate slots', done => {
+    const vm = new Vue({
+      template: `
+        <foo ref="foo">
+          <div slot="a">{{ n }}</div>
+        </foo>
+      `,
+      data: {
+        n: 1
+      },
       components: {
-        test: {
-          template: `<div>
-            <slot v-if="true"></slot>
-            <slot v-else></slot>
-          </div>`
+        foo: {
+          data() {
+            return { ok: true }
+          },
+          template: `
+            <div>
+              <slot name="a" />
+              <slot v-if="ok" name="a" />
+              <pre><slot name="a" /></pre>
+            </div>
+          `
         }
       }
     }).$mount()
-    expect('Duplicate presence of slot "default"').not.toHaveBeenWarned()
+    expect(vm.$el.innerHTML).toBe(`<div>1</div> <div>1</div> <pre><div>1</div></pre>`)
+    vm.n++
+    waitForUpdate(() => {
+      expect(vm.$el.innerHTML).toBe(`<div>2</div> <div>2</div> <pre><div>2</div></pre>`)
+      vm.n++
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe(`<div>3</div> <div>3</div> <pre><div>3</div></pre>`)
+      vm.$refs.foo.ok = false
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe(`<div>3</div> <!----> <pre><div>3</div></pre>`)
+      vm.n++
+      vm.$refs.foo.ok = true
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe(`<div>4</div> <div>4</div> <pre><div>4</div></pre>`)
+    }).then(done)
   })
 
   // #3518
@@ -540,6 +583,7 @@ describe('Component slot', () => {
       }
     }).$mount()
 
+    document.body.appendChild(vm.$el)
     expect(vm.$el.textContent).toBe('hi')
     vm.$children[0].toggle = false
     waitForUpdate(() => {
@@ -547,6 +591,8 @@ describe('Component slot', () => {
     }).then(() => {
       triggerEvent(vm.$el.querySelector('.click'), 'click')
       expect(spy).toHaveBeenCalled()
+    }).then(() => {
+      document.body.removeChild(vm.$el)
     }).then(done)
   })
 
@@ -824,4 +870,134 @@ describe('Component slot', () => {
       expect(vm.$el.textContent).toBe('hello')
     }).then(done)
   })
+
+  it('should allow passing named slots as raw children down multiple layers of functional component', () => {
+    const CompB = {
+      functional: true,
+      render (h, { slots }) {
+        return slots().foo
+      }
+    }
+
+    const CompA = {
+      functional: true,
+      render (h, { children }) {
+        return h(CompB, children)
+      }
+    }
+
+    const vm = new Vue({
+      components: {
+        CompA
+      },
+      template: `
+        <div>
+          <comp-a>
+            <span slot="foo">foo</span>
+          </comp-a>
+        </div>
+      `
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('foo')
+  })
+
+  // #7817
+  it('should not match wrong named slot in functional component on re-render', done => {
+    const Functional = {
+      functional: true,
+      render: (h, ctx) => ctx.slots().default
+    }
+
+    const Stateful = {
+      data () {
+        return { ok: true }
+      },
+      render (h) {
+        this.ok // register dep
+        return h('div', [
+          h(Functional, this.$slots.named)
+        ])
+      }
+    }
+
+    const vm = new Vue({
+      template: `<stateful ref="stateful"><div slot="named">foo</div></stateful>`,
+      components: { Stateful }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('foo')
+    vm.$refs.stateful.ok = false
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe('foo')
+    }).then(done)
+  })
+
+  // #7975
+  it('should update named slot correctly when its position in the tree changed', done => {
+    const ChildComponent = {
+      template: '<b>{{ message }}</b>',
+      props: ['message']
+    }
+     let parentVm
+    const ParentComponent = {
+      template: `
+        <div>
+          <span v-if="alter">
+            <span><slot name="foo" /></span>
+          </span>
+          <span v-else>
+            <slot name="foo" />
+          </span>
+        </div>
+      `,
+      data () {
+        return {
+          alter: true
+        }
+      },
+      mounted () {
+        parentVm = this
+      }
+    }
+     const vm = new Vue({
+      template: `
+        <parent-component>
+          <span slot="foo">
+            <child-component :message="message" />
+          </span>
+        </parent-component>
+      `,
+      components: {
+        ChildComponent,
+        ParentComponent
+      },
+      data () {
+        return {
+          message: 1
+        }
+      }
+    }).$mount()
+     expect(vm.$el.firstChild.innerHTML).toBe('<span><span><b>1</b></span></span>')
+    parentVm.alter = false
+    waitForUpdate(() => {
+      vm.message = 2
+    }).then(() => {
+      expect(vm.$el.firstChild.innerHTML).toBe('<span><b>2</b></span>')
+    }).then(done)
+  })
+
+  // #12102
+  it('v-if inside scoped slot', () => {
+    const vm = new Vue({
+      template: `<test><template #custom><span v-if="false">a</span><span>b</span></template></test>`,
+      components: {
+        test: {
+          template: `<div><slot name="custom"/></div>`
+        }
+      }
+    }).$mount()
+
+    expect(vm.$el.innerHTML).toBe(`<!----><span>b</span>`)
+  })
 })
diff --git a/test/unit/features/component/component.spec.js b/test/unit/features/component/component.spec.js
index 34c037a1e74..697a9dddbe7 100644
--- a/test/unit/features/component/component.spec.js
+++ b/test/unit/features/component/component.spec.js
@@ -426,4 +426,17 @@ describe('Component', () => {
       vm.$destroy()
     }).then(done)
   })
+
+  it('render vnode with <script> tag as root element', () => {
+    const vm = new Vue({
+      template: '<scriptTest></scriptTest>',
+      components: {
+        scriptTest: {
+          template: '<script>console.log(1)</script>'
+        }
+      }
+    }).$mount()
+    expect(vm.$el.nodeName).toBe('#comment')
+    expect('Templates should only be responsible for mapping the state').toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/features/directives/bind.spec.js b/test/unit/features/directives/bind.spec.js
index e9ab1bf7361..7e4827dc061 100644
--- a/test/unit/features/directives/bind.spec.js
+++ b/test/unit/features/directives/bind.spec.js
@@ -69,25 +69,25 @@ describe('Directive v-bind', () => {
 
   it('enumerated attr', done => {
     const vm = new Vue({
-      template: '<div><span :draggable="foo">hello</span></div>',
+      template: '<div><span :contenteditable="foo">hello</span></div>',
       data: { foo: true }
     }).$mount()
-    expect(vm.$el.firstChild.getAttribute('draggable')).toBe('true')
-    vm.foo = 'again'
+    expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('true')
+    vm.foo = 'plaintext-only' // allow special values
     waitForUpdate(() => {
-      expect(vm.$el.firstChild.getAttribute('draggable')).toBe('true')
+      expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('plaintext-only')
       vm.foo = null
     }).then(() => {
-      expect(vm.$el.firstChild.getAttribute('draggable')).toBe('false')
+      expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('false')
       vm.foo = ''
     }).then(() => {
-      expect(vm.$el.firstChild.getAttribute('draggable')).toBe('true')
+      expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('true')
       vm.foo = false
     }).then(() => {
-      expect(vm.$el.firstChild.getAttribute('draggable')).toBe('false')
+      expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('false')
       vm.foo = 'false'
     }).then(() => {
-      expect(vm.$el.firstChild.getAttribute('draggable')).toBe('false')
+      expect(vm.$el.firstChild.getAttribute('contenteditable')).toBe('false')
     }).then(done)
   })
 
@@ -133,6 +133,20 @@ describe('Directive v-bind', () => {
     expect(vm.$el.getAttribute('id')).toBe(null)
   })
 
+  if (process.env.VBIND_PROP_SHORTHAND) {
+    it('.prop modifier shorthand', () => {
+      const vm = new Vue({
+        template: '<div><span .text-content="foo"></span><span .inner-html="bar"></span></div>',
+        data: {
+          foo: 'hello',
+          bar: '<span>qux</span>'
+        }
+      }).$mount()
+      expect(vm.$el.children[0].textContent).toBe('hello')
+      expect(vm.$el.children[1].innerHTML).toBe('<span>qux</span>')
+    })
+  }
+
   it('.camel modifier', () => {
     const vm = new Vue({
       template: '<svg :view-box.camel="viewBox"></svg>',
@@ -157,8 +171,36 @@ describe('Directive v-bind', () => {
       }
     }).$mount()
 
+    document.body.appendChild(vm.$el)
     expect(vm.$el.textContent).toBe('1')
     triggerEvent(vm.$el, 'click')
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toBe('2')
+      document.body.removeChild(vm.$el)
+    }).then(done)
+  })
+
+  it('.sync modifier with kebab case event', done => {
+    const vm = new Vue({
+      template: `<test ref="test" :foo-bar.sync="bar"/>`,
+      data: {
+        bar: 1
+      },
+      components: {
+        test: {
+          props: ['fooBar'],
+          template: `<div>{{ fooBar }}</div>`,
+          methods: {
+            update () {
+              this.$emit('update:foo-bar', 2)
+            }
+          }
+        }
+      }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('1')
+    vm.$refs.test.update()
     waitForUpdate(() => {
       expect(vm.$el.textContent).toBe('2')
     }).then(done)
@@ -187,6 +229,25 @@ describe('Directive v-bind', () => {
     }).then(done)
   })
 
+  it('bind object with explicit overrides', () => {
+    const vm = new Vue({
+      template: `<test v-bind="test" data-foo="foo" dataBar="bar"/>`,
+      components: {
+        test: {
+          template: '<div>{{ dataFoo }} {{ dataBar }}</div>',
+          props: ['dataFoo', 'dataBar']
+        }
+      },
+      data: {
+        test: {
+          dataFoo: 'hi',
+          dataBar: 'bye'
+        }
+      }
+    }).$mount()
+    expect(vm.$el.textContent).toBe('foo bar')
+  })
+
   it('.sync modifier with bind object', done => {
     const vm = new Vue({
       template: `<test v-bind.sync="test"/>`,
@@ -207,6 +268,7 @@ describe('Directive v-bind', () => {
         }
       }
     }).$mount()
+    document.body.appendChild(vm.$el)
     expect(vm.$el.textContent).toBe('1')
     triggerEvent(vm.$el, 'click')
     waitForUpdate(() => {
@@ -214,6 +276,7 @@ describe('Directive v-bind', () => {
       vm.test.fooBar = 3
     }).then(() => {
       expect(vm.$el.textContent).toBe('3')
+      document.body.removeChild(vm.$el)
     }).then(done)
   })
 
@@ -411,4 +474,130 @@ describe('Directive v-bind', () => {
       expect(vm.$el.innerHTML).toBe('<div>comp</div>')
     })
   })
+
+  describe('dynamic arguments', () => {
+    it('basic', done => {
+      const vm = new Vue({
+        template: `<div v-bind:[key]="value"></div>`,
+        data: {
+          key: 'id',
+          value: 'hello'
+        }
+      }).$mount()
+      expect(vm.$el.id).toBe('hello')
+      vm.key = 'class'
+      waitForUpdate(() => {
+        expect(vm.$el.id).toBe('')
+        expect(vm.$el.className).toBe('hello')
+        // explicit null value
+        vm.key = null
+      }).then(() => {
+        expect(vm.$el.className).toBe('')
+        expect(vm.$el.id).toBe('')
+        vm.key = undefined
+      }).then(() => {
+        expect(`Invalid value for dynamic directive argument`).toHaveBeenWarned()
+      }).then(done)
+    })
+
+    it('shorthand', done => {
+      const vm = new Vue({
+        template: `<div :[key]="value"></div>`,
+        data: {
+          key: 'id',
+          value: 'hello'
+        }
+      }).$mount()
+      expect(vm.$el.id).toBe('hello')
+      vm.key = 'class'
+      waitForUpdate(() => {
+        expect(vm.$el.className).toBe('hello')
+      }).then(done)
+    })
+
+    it('with .prop modifier', done => {
+      const vm = new Vue({
+        template: `<div :[key].prop="value"></div>`,
+        data: {
+          key: 'id',
+          value: 'hello'
+        }
+      }).$mount()
+      expect(vm.$el.id).toBe('hello')
+      vm.key = 'textContent'
+      waitForUpdate(() => {
+        expect(vm.$el.textContent).toBe('hello')
+      }).then(done)
+    })
+
+    if (process.env.VBIND_PROP_SHORTHAND) {
+      it('.prop shorthand', done => {
+        const vm = new Vue({
+          template: `<div .[key]="value"></div>`,
+          data: {
+            key: 'id',
+            value: 'hello'
+          }
+        }).$mount()
+        expect(vm.$el.id).toBe('hello')
+        vm.key = 'textContent'
+        waitForUpdate(() => {
+          expect(vm.$el.textContent).toBe('hello')
+        }).then(done)
+      })
+    }
+
+    it('handle class and style', () => {
+      const vm = new Vue({
+        template: `<div :[key]="value" :[key2]="value2"></div>`,
+        data: {
+          key: 'class',
+          value: ['hello', 'world'],
+          key2: 'style',
+          value2: {
+            color: 'red'
+          }
+        }
+      }).$mount()
+      expect(vm.$el.className).toBe('hello world')
+      expect(vm.$el.style.color).toBe('red')
+    })
+
+    it('handle shouldUseProp', done => {
+      const vm = new Vue({
+        template: `<input :[key]="value">`,
+        data: {
+          key: 'value',
+          value: 'foo'
+        }
+      }).$mount()
+      expect(vm.$el.value).toBe('foo')
+      vm.value = 'bar'
+      waitForUpdate(() => {
+        expect(vm.$el.value).toBe('bar')
+      }).then(done)
+    })
+
+    it('with .sync modifier', done => {
+      const vm = new Vue({
+        template: `<foo ref="child" :[key].sync="value"/>`,
+        data: {
+          key: 'foo',
+          value: 'bar'
+        },
+        components: {
+          foo: {
+            props: ['foo'],
+            template: `<div>{{ foo }}</div>`
+          }
+        }
+      }).$mount()
+      expect(vm.$el.textContent).toBe('bar')
+      vm.$refs.child.$emit('update:foo', 'baz')
+      waitForUpdate(() => {
+        expect(vm.value).toBe('baz')
+        expect(vm.$el.textContent).toBe('baz')
+      }).then(done)
+    })
+  })
 })
diff --git a/test/unit/features/directives/class.spec.js b/test/unit/features/directives/class.spec.js
index c1390697ed9..38a25988d2a 100644
--- a/test/unit/features/directives/class.spec.js
+++ b/test/unit/features/directives/class.spec.js
@@ -5,7 +5,7 @@ function assertClass (assertions, done) {
     template: '<div class="foo" :class="value"></div>',
     data: { value: '' }
   }).$mount()
-  var chain = waitForUpdate()
+  const chain = waitForUpdate()
   assertions.forEach(([value, expected], i) => {
     chain.then(() => {
       if (typeof value === 'function') {
@@ -152,6 +152,39 @@ describe('Directive v-bind:class', () => {
     }).then(done)
   })
 
+  // css static classes should only contain a single space in between,
+  // as all the text inside of classes is shipped as a JS string
+  // and this could lead to useless spacing in static classes
+  it('condenses whitespace in staticClass', done => {
+    const vm = new Vue({
+      template: '<div class=" test1\ntest2\ttest3 test4   test5 \n \n \ntest6\t"></div>',
+    }).$mount()
+    expect(vm.$el.className).toBe('test1 test2 test3 test4 test5 test6')
+    done()
+  })
+
+  it('condenses whitespace in staticClass merge in a component', done => {
+    const vm = new Vue({
+      template: `
+        <component1 class="\n\t staticClass \t\n" :class="componentClass1">
+        </component1>
+      `,
+      data: {
+        componentClass1: 'componentClass1',
+      },
+      components: {
+        component1: {
+          template: '<div class="\n\t test \t\n"></div>'
+        },
+      }
+    }).$mount()
+    expect(vm.$el.className).toBe('test staticClass componentClass1')
+    vm.componentClass1 = 'c1'
+    waitForUpdate(() => {
+      expect(vm.$el.className).toBe('test staticClass c1')
+    }).then(done)
+  })
+
   // a vdom patch edge case where the user has several un-keyed elements of the
   // same tag next to each other, and toggling them.
   it('properly remove staticClass for toggling un-keyed children', done => {
diff --git a/test/unit/features/directives/for.spec.js b/test/unit/features/directives/for.spec.js
index ec270ca9cc2..eb28b09ca8d 100644
--- a/test/unit/features/directives/for.spec.js
+++ b/test/unit/features/directives/for.spec.js
@@ -1,4 +1,5 @@
 import Vue from 'vue'
+import { hasSymbol } from 'core/util/env'
 
 describe('Directive v-for', () => {
   it('should render array of primitive values', done => {
@@ -123,6 +124,225 @@ describe('Directive v-for', () => {
     }).then(done)
   })
 
+  if (hasSymbol) {
+    it('should render native iterables (Map)', () => {
+      const vm = new Vue({
+        template: `<div><span v-for="[key, val] in list">{{key}},{{val}}</span></div>`,
+        data: {
+          list: new Map([[1, 'foo'], [2, 'bar']])
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe(`<span>1,foo</span><span>2,bar</span>`)
+    })
+
+    it('should render native iterables (Set)', () => {
+      const vm = new Vue({
+        template: `<div><span v-for="val in list">{{val}}</span></div>`,
+        data: {
+          list: new Set([1, 2, 3])
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe(`<span>1</span><span>2</span><span>3</span>`)
+    })
+
+    it('should render iterable of primitive values', done => {
+      const iterable = {
+        models: ['a', 'b', 'c'],
+        index: 0,
+        [Symbol.iterator] () {
+          const iterator = {
+            index: 0,
+            models: this.models,
+            next () {
+              if (this.index < this.models.length) {
+                return { value: this.models[this.index++] }
+              } else {
+                return { done: true }
+              }
+            }
+          }
+          return iterator
+        }
+      }
+      const vm = new Vue({
+        template: `
+          <div>
+            <span v-for="item in list">{{item}}</span>
+          </div>
+        `,
+        data: {
+          list: iterable
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe('<span>a</span><span>b</span><span>c</span>')
+      Vue.set(vm.list.models, 0, 'd')
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML).toBe('<span>d</span><span>b</span><span>c</span>')
+        vm.list.models.push('d')
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>d</span><span>b</span><span>c</span><span>d</span>')
+        vm.list.models.splice(1, 2)
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>d</span><span>d</span>')
+        vm.list.models = ['x', 'y']
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>x</span><span>y</span>')
+      }).then(done)
+    })
+
+    it('should render iterable of primitive values with index', done => {
+      const iterable = {
+        models: ['a', 'b', 'c'],
+        index: 0,
+        [Symbol.iterator] () {
+          const iterator = {
+            index: 0,
+            models: this.models,
+            next () {
+              if (this.index < this.models.length) {
+                return { value: this.models[this.index++] }
+              } else {
+                return { done: true }
+              }
+            }
+          }
+          return iterator
+        }
+      }
+
+      const vm = new Vue({
+        template: `
+          <div>
+            <span v-for="(item, i) in list">{{i}}-{{item}}</span>
+          </div>
+        `,
+        data: {
+          list: iterable
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe('<span>0-a</span><span>1-b</span><span>2-c</span>')
+      Vue.set(vm.list.models, 0, 'd')
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-d</span><span>1-b</span><span>2-c</span>')
+        vm.list.models.push('d')
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-d</span><span>1-b</span><span>2-c</span><span>3-d</span>')
+        vm.list.models.splice(1, 2)
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-d</span><span>1-d</span>')
+        vm.list.models = ['x', 'y']
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-x</span><span>1-y</span>')
+      }).then(done)
+    })
+
+    it('should render iterable of object values', done => {
+      const iterable = {
+        models: [
+          { value: 'a' },
+          { value: 'b' },
+          { value: 'c' }
+        ],
+        index: 0,
+        [Symbol.iterator] () {
+          const iterator = {
+            index: 0,
+            models: this.models,
+            next () {
+              if (this.index < this.models.length) {
+                return { value: this.models[this.index++] }
+              } else {
+                return { done: true }
+              }
+            }
+          }
+          return iterator
+        }
+      }
+
+      const vm = new Vue({
+        template: `
+          <div>
+            <span v-for="item in list">{{item.value}}</span>
+          </div>
+        `,
+        data: {
+          list: iterable
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe('<span>a</span><span>b</span><span>c</span>')
+      Vue.set(vm.list.models, 0, { value: 'd' })
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML).toBe('<span>d</span><span>b</span><span>c</span>')
+        vm.list.models[0].value = 'e'
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>e</span><span>b</span><span>c</span>')
+        vm.list.models.push({})
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>e</span><span>b</span><span>c</span><span></span>')
+        vm.list.models.splice(1, 2)
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>e</span><span></span>')
+        vm.list.models = [{ value: 'x' }, { value: 'y' }]
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>x</span><span>y</span>')
+      }).then(done)
+    })
+
+    it('should render iterable of object values with index', done => {
+      const iterable = {
+        models: [
+          { value: 'a' },
+          { value: 'b' },
+          { value: 'c' }
+        ],
+        index: 0,
+        [Symbol.iterator] () {
+          const iterator = {
+            index: 0,
+            models: this.models,
+            next () {
+              if (this.index < this.models.length) {
+                return { value: this.models[this.index++] }
+              } else {
+                return { done: true }
+              }
+            }
+          }
+          return iterator
+        }
+      }
+
+      const vm = new Vue({
+        template: `
+          <div>
+            <span v-for="(item, i) in list">{{i}}-{{item.value}}</span>
+          </div>
+        `,
+        data: {
+          list: iterable
+        }
+      }).$mount()
+      expect(vm.$el.innerHTML).toBe('<span>0-a</span><span>1-b</span><span>2-c</span>')
+      Vue.set(vm.list.models, 0, { value: 'd' })
+      waitForUpdate(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-d</span><span>1-b</span><span>2-c</span>')
+        vm.list.models[0].value = 'e'
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-e</span><span>1-b</span><span>2-c</span>')
+        vm.list.models.push({})
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-e</span><span>1-b</span><span>2-c</span><span>3-</span>')
+        vm.list.models.splice(1, 2)
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-e</span><span>1-</span>')
+        vm.list.models = [{ value: 'x' }, { value: 'y' }]
+      }).then(() => {
+        expect(vm.$el.innerHTML).toBe('<span>0-x</span><span>1-y</span>')
+      }).then(done)
+    })
+  }
+
   it('should render an Object', done => {
     const vm = new Vue({
       template: `
@@ -330,7 +550,7 @@ describe('Directive v-for', () => {
     }).then(done)
 
     function assertMarkup () {
-      var markup = vm.list.map(function (item) {
+      const markup = vm.list.map(function (item) {
         return '<p>' + item.a + '</p><p>' + (item.a + 1) + '</p>'
       }).join('')
       expect(vm.$el.innerHTML).toBe(markup)
@@ -370,7 +590,7 @@ describe('Directive v-for', () => {
     }).then(done)
 
     function assertMarkup () {
-      var markup = vm.list.map(function (item) {
+      const markup = vm.list.map(function (item) {
         return `<p>${item.a}<span>${item.a}</span></p>`
       }).join('')
       expect(vm.$el.innerHTML).toBe(markup)
@@ -464,6 +684,66 @@ describe('Directive v-for', () => {
     }).then(done)
   })
 
+  // #7792
+  it('should work with multiline expressions', () => {
+    const vm = new Vue({
+      data: {
+        a: [1],
+        b: [2]
+      },
+      template: `
+        <div>
+          <span v-for="n in (
+            a.concat(
+              b
+            )
+          )">{{ n }}</span>
+        </div>
+      `
+    }).$mount()
+    expect(vm.$el.textContent).toBe('12')
+  })
+
+  // #9181
+  it('components with v-for and empty list', done => {
+    const vm = new Vue({
+      template:
+        '<div attr>' +
+          '<foo v-for="item in list" :key="item">{{ item }}</foo>' +
+        '</div>',
+      data: {
+        list: undefined
+      },
+      components: {
+        foo: {
+          template: '<div><slot></slot></div>'
+        },
+      }
+    }).$mount()
+    expect(vm.$el.innerHTML).toBe('')
+    vm.list = [1, 2, 3]
+    waitForUpdate(() => {
+      expect(vm.$el.innerHTML).toBe('<div>1</div><div>2</div><div>3</div>')
+    }).then(done)
+  })
+
+  it('elements with v-for and empty list', done => {
+    const vm = new Vue({
+      template:
+        '<div attr>' +
+          '<div v-for="item in list">{{ item }}</div>' +
+        '</div>',
+      data: {
+        list: undefined
+      }
+    }).$mount()
+    expect(vm.$el.innerHTML).toBe('')
+    vm.list = [1, 2, 3]
+    waitForUpdate(() => {
+      expect(vm.$el.innerHTML).toBe('<div>1</div><div>2</div><div>3</div>')
+    }).then(done)
+  })
+
   const supportsDestructuring = (() => {
     try {
       new Function('var { foo } = bar')
diff --git a/test/unit/features/directives/html.spec.js b/test/unit/features/directives/html.spec.js
index c398828ac1d..5e67c815b2e 100644
--- a/test/unit/features/directives/html.spec.js
+++ b/test/unit/features/directives/html.spec.js
@@ -44,6 +44,12 @@ describe('Directive v-html', () => {
       vm.a = {}
     }).then(() => {
       expect(vm.$el.innerHTML).toBe('{}')
+      vm.a = { toString () { return 'foo' } }
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe('foo')
+      vm.a = { toJSON () { return { foo: 'bar' } } }
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe('{\n  "foo": "bar"\n}')
       vm.a = 123
     }).then(() => {
       expect(vm.$el.innerHTML).toBe('123')
diff --git a/test/unit/features/directives/model-checkbox.spec.js b/test/unit/features/directives/model-checkbox.spec.js
index e102af62609..0d6ba2f7d15 100644
--- a/test/unit/features/directives/model-checkbox.spec.js
+++ b/test/unit/features/directives/model-checkbox.spec.js
@@ -56,6 +56,7 @@ describe('Directive v-model checkbox', () => {
       },
       template: `
         <div>
+          {{ test }}
           <input type="checkbox" v-model="test" value="1">
           <input type="checkbox" v-model="test" value="2">
         </div>
@@ -65,13 +66,16 @@ describe('Directive v-model checkbox', () => {
     expect(vm.$el.children[0].checked).toBe(true)
     expect(vm.$el.children[1].checked).toBe(false)
     vm.$el.children[0].click()
-    expect(vm.test.length).toBe(0)
-    vm.$el.children[1].click()
-    expect(vm.test).toEqual(['2'])
-    vm.$el.children[0].click()
-    expect(vm.test).toEqual(['2', '1'])
-    vm.test = ['1']
     waitForUpdate(() => {
+      expect(vm.test.length).toBe(0)
+      vm.$el.children[1].click()
+    }).then(() => {
+      expect(vm.test).toEqual(['2'])
+      vm.$el.children[0].click()
+    }).then(() => {
+      expect(vm.test).toEqual(['2', '1'])
+      vm.test = ['1']
+    }).then(() => {
       expect(vm.$el.children[0].checked).toBe(true)
       expect(vm.$el.children[1].checked).toBe(false)
     }).then(done)
@@ -93,13 +97,16 @@ describe('Directive v-model checkbox', () => {
     expect(vm.$el.children[0].checked).toBe(true)
     expect(vm.$el.children[1].checked).toBe(false)
     vm.$el.children[0].click()
-    expect(vm.test.length).toBe(0)
-    vm.$el.children[1].click()
-    expect(vm.test).toEqual(['2'])
-    vm.$el.children[0].click()
-    expect(vm.test).toEqual(['2', '1'])
-    vm.test = ['1']
     waitForUpdate(() => {
+      expect(vm.test.length).toBe(0)
+      vm.$el.children[1].click()
+    }).then(() => {
+      expect(vm.test).toEqual(['2'])
+      vm.$el.children[0].click()
+    }).then(() => {
+      expect(vm.test).toEqual(['2', '1'])
+      vm.test = ['1']
+    }).then(() => {
       expect(vm.$el.children[0].checked).toBe(true)
       expect(vm.$el.children[1].checked).toBe(false)
     }).then(done)
@@ -121,13 +128,16 @@ describe('Directive v-model checkbox', () => {
     expect(vm.$el.children[0].checked).toBe(true)
     expect(vm.$el.children[1].checked).toBe(false)
     vm.$el.children[0].click()
-    expect(vm.test.length).toBe(0)
-    vm.$el.children[1].click()
-    expect(vm.test).toEqual([2])
-    vm.$el.children[0].click()
-    expect(vm.test).toEqual([2, 1])
-    vm.test = [1]
     waitForUpdate(() => {
+      expect(vm.test.length).toBe(0)
+      vm.$el.children[1].click()
+    }).then(() => {
+      expect(vm.test).toEqual([2])
+      vm.$el.children[0].click()
+    }).then(() => {
+      expect(vm.test).toEqual([2, 1])
+      vm.test = [1]
+    }).then(() => {
       expect(vm.$el.children[0].checked).toBe(true)
       expect(vm.$el.children[1].checked).toBe(false)
     }).then(done)
@@ -149,13 +159,16 @@ describe('Directive v-model checkbox', () => {
     expect(vm.$el.children[0].checked).toBe(true)
     expect(vm.$el.children[1].checked).toBe(false)
     vm.$el.children[0].click()
-    expect(vm.test.length).toBe(0)
-    vm.$el.children[1].click()
-    expect(vm.test).toEqual([{ a: 2 }])
-    vm.$el.children[0].click()
-    expect(vm.test).toEqual([{ a: 2 }, { a: 1 }])
-    vm.test = [{ a: 1 }]
     waitForUpdate(() => {
+      expect(vm.test.length).toBe(0)
+      vm.$el.children[1].click()
+    }).then(() => {
+      expect(vm.test).toEqual([{ a: 2 }])
+      vm.$el.children[0].click()
+    }).then(() => {
+      expect(vm.test).toEqual([{ a: 2 }, { a: 1 }])
+      vm.test = [{ a: 1 }]
+    }).then(() => {
       expect(vm.$el.children[0].checked).toBe(true)
       expect(vm.$el.children[1].checked).toBe(false)
     }).then(done)
@@ -177,13 +190,16 @@ describe('Directive v-model checkbox', () => {
     expect(vm.$el.children[0].checked).toBe(true)
     expect(vm.$el.children[1].checked).toBe(false)
     vm.$el.children[0].click()
-    expect(vm.test.length).toBe(0)
-    vm.$el.children[1].click()
-    expect(vm.test).toEqual([[2]])
-    vm.$el.children[0].click()
-    expect(vm.test).toEqual([[2], { a: 1 }])
-    vm.test = [{ a: 1 }]
     waitForUpdate(() => {
+      expect(vm.test.length).toBe(0)
+      vm.$el.children[1].click()
+    }).then(() => {
+      expect(vm.test).toEqual([[2]])
+      vm.$el.children[0].click()
+    }).then(() => {
+      expect(vm.test).toEqual([[2], { a: 1 }])
+      vm.test = [{ a: 1 }]
+    }).then(() => {
       expect(vm.$el.children[0].checked).toBe(true)
       expect(vm.$el.children[1].checked).toBe(false)
     }).then(done)
@@ -337,4 +353,15 @@ describe('Directive v-model checkbox', () => {
       expect(vm.$el.children[1].textContent).toBe('false')
     }).then(done)
   })
+
+  // #7811
+  it('type should not be overwritten by v-bind', () => {
+    const vm = new Vue({
+      data: {
+        test: true
+      },
+      template: '<input type="checkbox" v-model="test" v-bind="$attrs">'
+    }).$mount()
+    expect(vm.$el.type).toBe('checkbox')
+  })
 })
diff --git a/test/unit/features/directives/model-component.spec.js b/test/unit/features/directives/model-component.spec.js
index 6098e4d6241..49ff4ddb138 100644
--- a/test/unit/features/directives/model-component.spec.js
+++ b/test/unit/features/directives/model-component.spec.js
@@ -148,4 +148,86 @@ describe('Directive v-model component', () => {
     vm.$refs.input.$emit('input', '   foo o  ')
     expect(vm.text).toBe('foo o')
   })
+
+  // #8436
+  it('should not double transform mode props', () => {
+    const BaseInput = {
+      props: ['value'],
+      render (h) {
+        return h('input', {
+          domProps: {
+            value: this.value
+          },
+          on: {
+            input: e => this.$emit('input', e.target.value)
+          }
+        })
+      }
+    }
+
+    const FunctionalWrapper = {
+      functional: true,
+      render (h, ctx) {
+        return h(BaseInput, ctx.data)
+      }
+    }
+
+    let triggerCount = 0
+
+    const vm = new Vue({
+      components: {
+        FunctionalWrapper
+      },
+      template: `
+        <div>
+          <functional-wrapper v-model="val"/>
+        </div>
+      `,
+      data: {
+        internalVal: ''
+      },
+      computed: {
+        val: {
+          get () {
+            return this.internalVal
+          },
+          set (val) {
+            triggerCount++
+            this.internalVal = val
+          }
+        }
+      }
+    }).$mount()
+
+    document.body.appendChild(vm.$el)
+    triggerEvent(vm.$el.querySelector('input'), 'input')
+    expect(triggerCount).toBe(1)
+    document.body.removeChild(vm.$el)
+  })
+
+  // #9330
+  it('should add value to $attrs if not defined in props', () => {
+    const TestComponent = {
+      inheritAttrs: false,
+      render (h) {
+        return h('div', this.$attrs.value)
+      }
+    }
+
+    const vm = new Vue({
+      components: {
+        TestComponent
+      },
+      template: `
+        <div>
+          <test-component v-model="val"/>
+        </div>
+      `,
+      data: {
+        val: 'foo'
+      }
+    }).$mount()
+
+    expect(vm.$el.innerHTML).toBe('<div>foo</div>');
+  })
 })
diff --git a/test/unit/features/directives/model-radio.spec.js b/test/unit/features/directives/model-radio.spec.js
index 4b3886c2a5d..3ff4e50bca5 100644
--- a/test/unit/features/directives/model-radio.spec.js
+++ b/test/unit/features/directives/model-radio.spec.js
@@ -117,7 +117,7 @@ describe('Directive v-model radio', () => {
         '</div>'
     }).$mount()
     document.body.appendChild(vm.$el)
-    var inputs = vm.$el.getElementsByTagName('input')
+    const inputs = vm.$el.getElementsByTagName('input')
     inputs[1].click()
     waitForUpdate(() => {
       expect(vm.selections).toEqual(['b', '1'])
@@ -160,7 +160,7 @@ describe('Directive v-model radio', () => {
           '<input type="radio" value="true" v-model="test" name="test">' +
         '</div>'
     }).$mount()
-    var radioboxInput = vm.$el.children
+    const radioboxInput = vm.$el.children
     expect(radioboxInput[0].checked).toBe(false)
     expect(radioboxInput[1].checked).toBe(false)
     expect(radioboxInput[2].checked).toBe(true)
diff --git a/test/unit/features/directives/model-select.spec.js b/test/unit/features/directives/model-select.spec.js
index c961224972b..4fffe73a4f3 100644
--- a/test/unit/features/directives/model-select.spec.js
+++ b/test/unit/features/directives/model-select.spec.js
@@ -4,9 +4,9 @@ import { looseEqual } from 'shared/util'
 // Android 4.4 Chrome 30 has the bug that a multi-select option cannot be
 // deselected by setting its "selected" prop via JavaScript.
 function hasMultiSelectBug () {
-  var s = document.createElement('select')
+  const s = document.createElement('select')
   s.setAttribute('multiple', '')
-  var o = document.createElement('option')
+  const o = document.createElement('option')
   s.appendChild(o)
   o.selected = true
   o.selected = false
@@ -18,8 +18,8 @@ function hasMultiSelectBug () {
  * we have to manually loop through the options
  */
 function updateSelect (el, value) {
-  var options = el.options
-  var i = options.length
+  const options = el.options
+  let i = options.length
   while (i--) {
     if (looseEqual(getValue(options[i]), value)) {
       options[i].selected = true
@@ -245,7 +245,7 @@ describe('Directive v-model select', () => {
             '<option>c</option>' +
           '</select>'
       }).$mount()
-      var opts = vm.$el.options
+      const opts = vm.$el.options
       expect(opts[0].selected).toBe(false)
       expect(opts[1].selected).toBe(true)
       expect(opts[2].selected).toBe(false)
@@ -272,7 +272,7 @@ describe('Directive v-model select', () => {
             '<option v-for="o in opts">{{ o }}</option>' +
           '</select>'
       }).$mount()
-      var opts = vm.$el.options
+      const opts = vm.$el.options
       expect(opts[0].selected).toBe(false)
       expect(opts[1].selected).toBe(true)
       expect(opts[2].selected).toBe(false)
@@ -345,7 +345,7 @@ describe('Directive v-model select', () => {
         '<option selected>c</option>' +
       '</select>'
     }).$mount()
-    var opts = vm.$el.options
+    const opts = vm.$el.options
     expect(opts[0].selected).toBe(true)
     expect(opts[1].selected).toBe(true)
     expect(opts[2].selected).toBe(true)
@@ -379,8 +379,8 @@ describe('Directive v-model select', () => {
         '</div>'
     }).$mount()
     document.body.appendChild(vm.$el)
-    var selects = vm.$el.getElementsByTagName('select')
-    var select0 = selects[0]
+    const selects = vm.$el.getElementsByTagName('select')
+    const select0 = selects[0]
     select0.options[0].selected = true
     triggerEvent(select0, 'change')
     waitForUpdate(() => {
@@ -421,7 +421,7 @@ describe('Directive v-model select', () => {
           '<option value="true">c</option>' +
         '</select>'
     }).$mount()
-    var opts = vm.$el.options
+    const opts = vm.$el.options
     expect(opts[0].selected).toBe(false)
     expect(opts[1].selected).toBe(true)
     expect(opts[2].selected).toBe(false)
@@ -588,4 +588,31 @@ describe('Directive v-model select', () => {
       }).then(done)
     })
   })
+
+  // #7928
+  it('should correctly handle option with date value', done => {
+    const vm = new Vue({
+      data: {
+        dates: [
+          new Date(1520000000000),
+          new Date(1522000000000),
+          new Date(1516000000000)
+        ],
+        selectedDate: null
+      },
+      template:
+        '<div>' +
+          '<select v-model="selectedDate">' +
+            '<option v-for="(date, i) in dates" :key="i" :value="date">' +
+              '{{date}}' +
+            '</option>' +
+          '</select>' +
+        '</div>'
+    }).$mount()
+
+    vm.selectedDate = vm.dates[2]
+    waitForUpdate(() => {
+      expect(vm.$el.firstChild.selectedIndex).toBe(2)
+    }).then(done)
+  })
 })
diff --git a/test/unit/features/directives/model-text.spec.js b/test/unit/features/directives/model-text.spec.js
index 7aae24b654e..7cf5167461f 100644
--- a/test/unit/features/directives/model-text.spec.js
+++ b/test/unit/features/directives/model-text.spec.js
@@ -19,6 +19,21 @@ describe('Directive v-model text', () => {
     }).then(done)
   })
 
+  it('should work with space ended expression in v-model', () => {
+    const vm = new Vue({
+      data: {
+        obj: {
+          test: 'b'
+        }
+      },
+      template: '<input v-model="obj.test ">'
+    }).$mount()
+
+    triggerEvent(vm.$el, 'input')
+    expect(vm.obj['test ']).toBe(undefined)
+    expect(vm.obj.test).toBe('b')
+  })
+
   it('.lazy modifier', () => {
     const vm = new Vue({
       data: {
@@ -152,7 +167,7 @@ describe('Directive v-model text', () => {
           '<span ref="rs">{{selections}}</span>' +
         '</div>'
     }).$mount()
-    var inputs = vm.$el.getElementsByTagName('input')
+    const inputs = vm.$el.getElementsByTagName('input')
     inputs[1].value = 'test'
     triggerEvent(inputs[1], 'input')
     waitForUpdate(() => {
@@ -183,27 +198,25 @@ describe('Directive v-model text', () => {
     })
   }
 
-  if (!isAndroid) {
-    it('compositionevents', function (done) {
-      const vm = new Vue({
-        data: {
-          test: 'foo'
-        },
-        template: '<input v-model="test">'
-      }).$mount()
-      const input = vm.$el
-      triggerEvent(input, 'compositionstart')
-      input.value = 'baz'
-      // input before composition unlock should not call set
-      triggerEvent(input, 'input')
-      expect(vm.test).toBe('foo')
-      // after composition unlock it should work
-      triggerEvent(input, 'compositionend')
-      triggerEvent(input, 'input')
-      expect(vm.test).toBe('baz')
-      done()
-    })
-  }
+  it('compositionevents', function (done) {
+    const vm = new Vue({
+      data: {
+        test: 'foo'
+      },
+      template: '<input v-model="test">'
+    }).$mount()
+    const input = vm.$el
+    triggerEvent(input, 'compositionstart')
+    input.value = 'baz'
+    // input before composition unlock should not call set
+    triggerEvent(input, 'input')
+    expect(vm.test).toBe('foo')
+    // after composition unlock it should work
+    triggerEvent(input, 'compositionend')
+    triggerEvent(input, 'input')
+    expect(vm.test).toBe('baz')
+    done()
+  })
 
   it('warn invalid tag', () => {
     new Vue({
@@ -225,7 +238,7 @@ describe('Directive v-model text', () => {
       template: '<input v-model="a" @input="onInput">',
       methods: {
         onInput (e) {
-          spy(e.target.value)
+          spy(this.a)
         }
       }
     }).$mount()
@@ -291,6 +304,17 @@ describe('Directive v-model text', () => {
     expect('conflicts with v-model').not.toHaveBeenWarned()
   })
 
+  it('should not warn on input with dynamic type binding', () => {
+    new Vue({
+      data: {
+        type: 'checkbox',
+        test: 'foo'
+      },
+      template: '<input :type="type" v-model="test" :value="test">'
+    }).$mount()
+    expect('conflicts with v-model').not.toHaveBeenWarned()
+  })
+
   if (!isAndroid) {
     it('does not trigger extra input events with single compositionend', () => {
       const spy = jasmine.createSpy()
@@ -413,8 +437,8 @@ describe('Directive v-model text', () => {
     })
   }
 
-  // #7138
   if (isIE && !isIE9) {
+    // #7138
     it('should not fire input on initial render of textarea with placeholder in IE10/11', done => {
       const el = document.createElement('div')
       document.body.appendChild(el)
@@ -428,5 +452,21 @@ describe('Directive v-model text', () => {
         done()
       }, 17)
     })
+
+    // #9042
+    it('should not block the first input event when placeholder is empty', done => {
+      const el = document.createElement('div')
+      document.body.appendChild(el)
+      const vm = new Vue({
+        el,
+        data: { evtCount: 0 },
+        template: `<textarea placeholder="" @input="evtCount++"></textarea>`,
+      })
+      triggerEvent(vm.$el, 'input')
+      setTimeout(() => {
+        expect(vm.evtCount).toBe(1)
+        done()
+      }, 17)
+    })
   }
 })
diff --git a/test/unit/features/directives/on.spec.js b/test/unit/features/directives/on.spec.js
index 4ef3c699fe0..353d3df5372 100644
--- a/test/unit/features/directives/on.spec.js
+++ b/test/unit/features/directives/on.spec.js
@@ -31,7 +31,7 @@ describe('Directive v-on', () => {
     expect(event.type).toBe('click')
   })
 
-  it('should bind event to a inline statement', () => {
+  it('should bind event to an inline statement', () => {
     vm = new Vue({
       el,
       template: '<div v-on:click="foo(1,2,3,$event)"></div>',
@@ -218,7 +218,7 @@ describe('Directive v-on', () => {
   })
 
   // ctrl, shift, alt, meta
-  it('should support system modifers', () => {
+  it('should support system modifiers', () => {
     vm = new Vue({
       el,
       template: `
@@ -280,7 +280,7 @@ describe('Directive v-on', () => {
     expect(spy.calls.count()).toBe(1)
   })
 
-  it('should support system modifers with exact', () => {
+  it('should support system modifiers with exact', () => {
     vm = new Vue({
       el,
       template: `
@@ -362,6 +362,35 @@ describe('Directive v-on', () => {
     expect(spyMiddle).toHaveBeenCalled()
   })
 
+  it('should support KeyboardEvent.key for built in aliases', () => {
+    vm = new Vue({
+      el,
+      template: `
+        <div>
+          <input ref="enter" @keyup.enter="foo">
+          <input ref="space" @keyup.space="foo">
+          <input ref="esc" @keyup.esc="foo">
+          <input ref="left" @keyup.left="foo">
+          <input ref="delete" @keyup.delete="foo">
+        </div>
+      `,
+      methods: { foo: spy }
+    })
+
+    triggerEvent(vm.$refs.enter, 'keyup', e => { e.key = 'Enter' })
+    expect(spy.calls.count()).toBe(1)
+    triggerEvent(vm.$refs.space, 'keyup', e => { e.key = ' ' })
+    expect(spy.calls.count()).toBe(2)
+    triggerEvent(vm.$refs.esc, 'keyup', e => { e.key = 'Escape' })
+    expect(spy.calls.count()).toBe(3)
+    triggerEvent(vm.$refs.left, 'keyup', e => { e.key = 'ArrowLeft' })
+    expect(spy.calls.count()).toBe(4)
+    triggerEvent(vm.$refs.delete, 'keyup', e => { e.key = 'Backspace' })
+    expect(spy.calls.count()).toBe(5)
+    triggerEvent(vm.$refs.delete, 'keyup', e => { e.key = 'Delete' })
+    expect(spy.calls.count()).toBe(6)
+  })
+
   it('should support custom keyCode', () => {
     Vue.config.keyCodes.test = 1
     vm = new Vue({
@@ -376,7 +405,7 @@ describe('Directive v-on', () => {
     Vue.config.keyCodes = Object.create(null)
   })
 
-  it('should override build-in keyCode', () => {
+  it('should override built-in keyCode', () => {
     Vue.config.keyCodes.up = [1, 87]
     vm = new Vue({
       el,
@@ -391,7 +420,7 @@ describe('Directive v-on', () => {
       e.keyCode = 1
     })
     expect(spy).toHaveBeenCalledTimes(2)
-    // should not affect build-in down keycode
+    // should not affect built-in down keycode
     triggerEvent(vm.$el, 'keyup', e => {
       e.keyCode = 40
     })
@@ -431,6 +460,34 @@ describe('Directive v-on', () => {
     expect(spy).toHaveBeenCalled()
   })
 
+  it('should throw a warning if native modifier is used on native HTML element', () => {
+    vm = new Vue({
+      el,
+      template: `
+        <button @click.native="foo"></button>
+      `,
+      methods: { foo: spy },
+    })
+
+    triggerEvent(vm.$el, 'click')
+    expect(`The .native modifier for v-on is only valid on components but it was used on <button>.`).toHaveBeenWarned()
+    expect(spy.calls.count()).toBe(0)
+  })
+
+  it('should not throw a warning if native modifier is used on a dynamic component', () => {
+    vm = new Vue({
+      el,
+      template: `
+        <component is="div" @click.native="foo('native')" @click="foo('regular')"/>
+      `,
+      methods: { foo: spy },
+    })
+
+    triggerEvent(vm.$el, 'click')
+    expect(`The .native modifier for v-on is only valid on components but it was used on <div>.`).not.toHaveBeenWarned()
+    expect(spy.calls.allArgs()).toEqual([['regular']]); // Regular @click should work for dynamic components resolved to native HTML elements.
+  })
+
   it('.once modifier should work with child components', () => {
     vm = new Vue({
       el,
@@ -706,10 +763,11 @@ describe('Directive v-on', () => {
 
   it('should transform click.middle to mouseup', () => {
     const spy = jasmine.createSpy('click.middle')
-    const vm = new Vue({
+    vm = new Vue({
+      el,
       template: `<div @click.middle="foo"></div>`,
       methods: { foo: spy }
-    }).$mount()
+    })
     triggerEvent(vm.$el, 'mouseup', e => { e.button = 0 })
     expect(spy).not.toHaveBeenCalled()
     triggerEvent(vm.$el, 'mouseup', e => { e.button = 1 })
@@ -866,4 +924,183 @@ describe('Directive v-on', () => {
     }).$mount()
     expect(`v-on without argument expects an Object value`).toHaveBeenWarned()
   })
+
+  it('should correctly remove once listener', done => {
+    const vm = new Vue({
+      template: `
+        <div>
+          <span v-if="ok" @click.once="foo">
+            a
+          </span>
+          <span v-else a="a">
+            b
+          </span>
+        </div>
+      `,
+      data: {
+        ok: true
+      },
+      methods: {
+        foo: spy
+      }
+    }).$mount()
+
+    vm.ok = false
+    waitForUpdate(() => {
+      triggerEvent(vm.$el.childNodes[0], 'click')
+      expect(spy.calls.count()).toBe(0)
+    }).then(done)
+  })
+
+  // #7628
+  it('handler should return the return value of inline function invocation', () => {
+    let value
+    new Vue({
+      template: `<test @foo="bar()"></test>`,
+      methods: {
+        bar() {
+          return 1
+        }
+      },
+      components: {
+        test: {
+          created() {
+            value = this.$listeners.foo()
+          },
+          render(h) {
+            return h('div')
+          }
+        }
+      }
+    }).$mount()
+    expect(value).toBe(1)
+  })
+
+  it('should not execute callback if modifiers are present', () => {
+    vm = new Vue({
+      el,
+      template: '<input @keyup.?="foo">',
+      methods: { foo: spy }
+    })
+    // simulating autocomplete event (Event object with type keyup but without keyCode)
+    triggerEvent(vm.$el, 'keyup')
+    expect(spy.calls.count()).toBe(0)
+  })
+
+  describe('dynamic arguments', () => {
+    it('basic', done => {
+      const spy = jasmine.createSpy()
+      const vm = new Vue({
+        template: `<div v-on:[key]="spy"></div>`,
+        data: {
+          key: 'click'
+        },
+        methods: {
+          spy
+        }
+      }).$mount()
+      triggerEvent(vm.$el, 'click')
+      expect(spy.calls.count()).toBe(1)
+      vm.key = 'mouseup'
+      waitForUpdate(() => {
+        triggerEvent(vm.$el, 'click')
+        expect(spy.calls.count()).toBe(1)
+        triggerEvent(vm.$el, 'mouseup')
+        expect(spy.calls.count()).toBe(2)
+        // explicit null value
+        vm.key = null
+      }).then(() => {
+        triggerEvent(vm.$el, 'click')
+        expect(spy.calls.count()).toBe(2)
+        triggerEvent(vm.$el, 'mouseup')
+        expect(spy.calls.count()).toBe(2)
+      }).then(done)
+    })
+
+    it('shorthand', done => {
+      const spy = jasmine.createSpy()
+      const vm = new Vue({
+        template: `<div @[key]="spy"></div>`,
+        data: {
+          key: 'click'
+        },
+        methods: {
+          spy
+        }
+      }).$mount()
+      triggerEvent(vm.$el, 'click')
+      expect(spy.calls.count()).toBe(1)
+      vm.key = 'mouseup'
+      waitForUpdate(() => {
+        triggerEvent(vm.$el, 'click')
+        expect(spy.calls.count()).toBe(1)
+        triggerEvent(vm.$el, 'mouseup')
+        expect(spy.calls.count()).toBe(2)
+      }).then(done)
+    })
+
+    it('with .middle modifier', () => {
+      const spy = jasmine.createSpy()
+      const vm = new Vue({
+        template: `<div @[key].middle="spy"></div>`,
+        data: {
+          key: 'click'
+        },
+        methods: {
+          spy
+        }
+      }).$mount()
+      triggerEvent(vm.$el, 'mouseup', e => { e.button = 0 })
+      expect(spy).not.toHaveBeenCalled()
+      triggerEvent(vm.$el, 'mouseup', e => { e.button = 1 })
+      expect(spy).toHaveBeenCalled()
+    })
+
+    it('with .right modifier', () => {
+      const spy = jasmine.createSpy()
+      const vm = new Vue({
+        template: `<div @[key].right="spy"></div>`,
+        data: {
+          key: 'click'
+        },
+        methods: {
+          spy
+        }
+      }).$mount()
+      triggerEvent(vm.$el, 'contextmenu')
+      expect(spy).toHaveBeenCalled()
+    })
+
+    it('with .capture modifier', () => {
+      const callOrder = []
+      const vm = new Vue({
+        template: `
+          <div @[key].capture="foo">
+            <div @[key]="bar"></div>
+          </div>
+        `,
+        data: {
+          key: 'click'
+        },
+        methods: {
+          foo () { callOrder.push(1) },
+          bar () { callOrder.push(2) }
+        }
+      }).$mount()
+      triggerEvent(vm.$el.firstChild, 'click')
+      expect(callOrder.toString()).toBe('1,2')
+    })
+
+    it('with .once modifier', () => {
+      const vm = new Vue({
+        template: `<div @[key].once="foo"></div>`,
+        data: { key: 'click' },
+        methods: { foo: spy }
+      }).$mount()
+      triggerEvent(vm.$el, 'click')
+      expect(spy.calls.count()).toBe(1)
+      triggerEvent(vm.$el, 'click')
+      expect(spy.calls.count()).toBe(1) // should no longer trigger
+    })
+  })
 })
diff --git a/test/unit/features/directives/pre.spec.js b/test/unit/features/directives/pre.spec.js
index 92d3bc85537..65def9cddb0 100644
--- a/test/unit/features/directives/pre.spec.js
+++ b/test/unit/features/directives/pre.spec.js
@@ -7,7 +7,7 @@ describe('Directive v-pre', function () {
         <div v-pre>{{ a }}</div>
         <div>{{ a }}</div>
         <div v-pre>
-          <component></component>
+          <component is="div"></component>
         </div>
       </div>`,
       data: {
@@ -17,7 +17,7 @@ describe('Directive v-pre', function () {
     vm.$mount()
     expect(vm.$el.firstChild.textContent).toBe('{{ a }}')
     expect(vm.$el.children[1].textContent).toBe('123')
-    expect(vm.$el.lastChild.innerHTML).toBe('<component></component>')
+    expect(vm.$el.lastChild.innerHTML).toBe('<component is="div"></component>')
   })
 
   it('should not compile on root node', function () {
@@ -31,4 +31,24 @@ describe('Directive v-pre', function () {
     vm.$mount()
     expect(vm.$el.firstChild.textContent).toBe('{{ a }}')
   })
+
+  // #8286
+  it('should not compile custom component tags', function () {
+    Vue.component('vtest', { template: ` <div>Hello World</div>` })
+    const vm = new Vue({
+      template: '<div v-pre><vtest></vtest></div>',
+      replace: true
+    })
+    vm.$mount()
+    expect(vm.$el.firstChild.tagName).toBe('VTEST')
+  })
+
+  // #10087
+  it('should not compile attributes', function () {
+    const vm = new Vue({
+      template: '<div v-pre><p open="hello">A Test</p></div>'
+    })
+    vm.$mount()
+    expect(vm.$el.firstChild.getAttribute('open')).toBe('hello')
+  })
 })
diff --git a/test/unit/features/directives/style.spec.js b/test/unit/features/directives/style.spec.js
index 1d8f68b77e0..d611ca4a4fc 100644
--- a/test/unit/features/directives/style.spec.js
+++ b/test/unit/features/directives/style.spec.js
@@ -1,11 +1,11 @@
 import Vue from 'vue'
 
 function checkPrefixedProp (prop) {
-  var el = document.createElement('div')
-  var upper = prop.charAt(0).toUpperCase() + prop.slice(1)
+  const el = document.createElement('div')
+  const upper = prop.charAt(0).toUpperCase() + prop.slice(1)
   if (!(prop in el.style)) {
-    var prefixes = ['Webkit', 'Moz', 'ms']
-    var i = prefixes.length
+    const prefixes = ['Webkit', 'Moz', 'ms']
+    let i = prefixes.length
     while (i--) {
       if ((prefixes[i] + upper) in el.style) {
         prop = prefixes[i] + upper
@@ -101,6 +101,13 @@ describe('Directive v-bind:style', () => {
     }).then(done)
   })
 
+  it('camelCase with !important', done => {
+    vm.styles = { zIndex: '100 !important' }
+    waitForUpdate(() => {
+      expect(vm.$el.style.getPropertyPriority('z-index')).toBe('important')
+    }).then(done)
+  })
+
   it('object with multiple entries', done => {
     vm.$el.style.color = 'red'
     vm.styles = {
diff --git a/test/unit/features/directives/text.spec.js b/test/unit/features/directives/text.spec.js
index 477badf9b9b..84f9bbe5db7 100644
--- a/test/unit/features/directives/text.spec.js
+++ b/test/unit/features/directives/text.spec.js
@@ -30,6 +30,12 @@ describe('Directive v-text', () => {
       vm.a = {}
     }).then(() => {
       expect(vm.$el.innerHTML).toBe('{}')
+      vm.a = { toString () { return 'foo' } }
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe('foo')
+      vm.a = { toJSON () { return { foo: 'bar' } } }
+    }).then(() => {
+      expect(vm.$el.innerHTML).toBe('{\n  "foo": "bar"\n}')
       vm.a = 123
     }).then(() => {
       expect(vm.$el.innerHTML).toBe('123')
diff --git a/test/unit/features/error-handling.spec.js b/test/unit/features/error-handling.spec.js
index 217bb72721a..7dd36dc9f1f 100644
--- a/test/unit/features/error-handling.spec.js
+++ b/test/unit/features/error-handling.spec.js
@@ -5,7 +5,7 @@ const components = createErrorTestComponents()
 describe('Error handling', () => {
   // hooks that prevents the component from rendering, but should not
   // break parent component
-  ;[
+  [
     ['data', 'data()'],
     ['render', 'render'],
     ['beforeCreate', 'beforeCreate hook'],
@@ -22,6 +22,23 @@ describe('Error handling', () => {
     })
   })
 
+  // hooks that can return rejected promise
+  ;[
+    ['beforeCreate', 'beforeCreate hook'],
+    ['created', 'created hook'],
+    ['beforeMount', 'beforeMount hook'],
+    ['mounted', 'mounted hook'],
+    ['event', 'event handler for "e"']
+  ].forEach(([type, description]) => {
+    it(`should recover from promise errors in ${type}`, done => {
+      createTestInstance(components[`${type}Async`])
+      waitForUpdate(() => {
+        expect(`Error in ${description} (Promise/async)`).toHaveBeenWarned()
+        expect(`Error: ${type}`).toHaveBeenWarned()
+      }).then(done)
+    })
+  })
+
   // error in mounted hook should affect neither child nor parent
   it('should recover from errors in mounted hook', done => {
     const vm = createTestInstance(components.mounted)
@@ -45,6 +62,20 @@ describe('Error handling', () => {
     })
   })
 
+  // hooks that can return rejected promise
+  ;[
+    ['beforeUpdate', 'beforeUpdate hook'],
+    ['updated', 'updated hook']
+  ].forEach(([type, description]) => {
+    it(`should recover from promise errors in ${type} hook`, done => {
+      const vm = createTestInstance(components[`${type}Async`])
+      assertBothInstancesActive(vm).then(() => {
+        expect(`Error in ${description} (Promise/async)`).toHaveBeenWarned()
+        expect(`Error: ${type}`).toHaveBeenWarned()
+      }).then(done)
+    })
+  })
+
   ;[
     ['beforeDestroy', 'beforeDestroy hook'],
     ['destroyed', 'destroyed hook'],
@@ -62,6 +93,21 @@ describe('Error handling', () => {
     })
   })
 
+  ;[
+    ['beforeDestroy', 'beforeDestroy hook'],
+    ['destroyed', 'destroyed hook']
+  ].forEach(([type, description]) => {
+    it(`should recover from promise errors in ${type} hook`, done => {
+      const vm = createTestInstance(components[`${type}Async`])
+      vm.ok = false
+      setTimeout(() => {
+        expect(`Error in ${description} (Promise/async)`).toHaveBeenWarned()
+        expect(`Error: ${type}`).toHaveBeenWarned()
+        assertRootInstanceActive(vm).then(done)
+      })
+    })
+  })
+
   it('should recover from errors in user watcher getter', done => {
     const vm = createTestInstance(components.userWatcherGetter)
     vm.n++
@@ -81,15 +127,25 @@ describe('Error handling', () => {
     }).then(done)
   })
 
-  it('should recover from errors in user watcher callback', done => {
-    const vm = createTestInstance(components.userWatcherCallback)
-    vm.n++
-    waitForUpdate(() => {
-      expect(`Error in callback for watcher "n"`).toHaveBeenWarned()
-      expect(`Error: userWatcherCallback`).toHaveBeenWarned()
-    }).thenWaitFor(next => {
-      assertBothInstancesActive(vm).end(next)
-    }).then(done)
+  ;[
+    ['userWatcherCallback', 'watcher'],
+    ['userImmediateWatcherCallback', 'immediate watcher']
+  ].forEach(([type, description]) => {
+    it(`should recover from errors in user ${description} callback`, done => {
+      const vm = createTestInstance(components[type])
+      assertBothInstancesActive(vm).then(() => {
+        expect(`Error in callback for ${description} "n"`).toHaveBeenWarned()
+        expect(`Error: ${type} error`).toHaveBeenWarned()
+      }).then(done)
+    })
+
+    it(`should recover from promise errors in user ${description} callback`, done => {
+      const vm = createTestInstance(components[`${type}Async`])
+      assertBothInstancesActive(vm).then(() => {
+        expect(`Error in callback for ${description} "n" (Promise/async)`).toHaveBeenWarned()
+        expect(`Error: ${type} error`).toHaveBeenWarned()
+      }).then(done)
+    })
   })
 
   it('config.errorHandler should capture render errors', done => {
@@ -142,6 +198,40 @@ describe('Error handling', () => {
     expect(vm.$el.textContent).toContain('error in render')
     Vue.config.errorHandler = null
   })
+
+  // event handlers that can throw errors or return rejected promise
+  ;[
+    ['single handler', '<div v-on:click="bork"></div>'],
+    ['multiple handlers', '<div v-on="{ click: [bork, function test() {}] }"></div>']
+  ].forEach(([type, template]) => {
+    it(`should recover from v-on errors for ${type} registered`, () => {
+      const vm = new Vue({
+        template,
+        methods: { bork () { throw new Error('v-on') } }
+      }).$mount()
+      document.body.appendChild(vm.$el)
+      triggerEvent(vm.$el, 'click')
+      expect('Error in v-on handler').toHaveBeenWarned()
+      expect('Error: v-on').toHaveBeenWarned()
+      document.body.removeChild(vm.$el)
+    })
+
+    it(`should recover from v-on async errors for ${type} registered`, (done) => {
+      const vm = new Vue({
+        template,
+        methods: { bork () {
+          return new Promise((resolve, reject) => reject(new Error('v-on async')))
+        } }
+      }).$mount()
+      document.body.appendChild(vm.$el)
+      triggerEvent(vm.$el, 'click')
+      waitForUpdate(() => {
+        expect('Error in v-on handler (Promise/async)').toHaveBeenWarned()
+        expect('Error: v-on').toHaveBeenWarned()
+        document.body.removeChild(vm.$el)
+      }).then(done)
+    })
+  })
 })
 
 function createErrorTestComponents () {
@@ -178,6 +268,16 @@ function createErrorTestComponents () {
       throw new Error(before)
     }
 
+    const beforeCompAsync = components[`${before}Async`] = {
+      props: ['n'],
+      render (h) {
+        return h('div', this.n)
+      }
+    }
+    beforeCompAsync[before] = function () {
+      return new Promise((resolve, reject) => reject(new Error(before)))
+    }
+
     // after
     const after = hook.replace(/e?$/, 'ed')
     const afterComp = components[after] = {
@@ -189,6 +289,16 @@ function createErrorTestComponents () {
     afterComp[after] = function () {
       throw new Error(after)
     }
+
+    const afterCompAsync = components[`${after}Async`] = {
+      props: ['n'],
+      render (h) {
+        return h('div', this.n)
+      }
+    }
+    afterCompAsync[after] = function () {
+      return new Promise((resolve, reject) => reject(new Error(after)))
+    }
   })
 
   // directive hooks errors
@@ -234,6 +344,48 @@ function createErrorTestComponents () {
     }
   }
 
+  components.userImmediateWatcherCallback = {
+    props: ['n'],
+    watch: {
+      n: {
+        immediate: true,
+        handler () {
+          throw new Error('userImmediateWatcherCallback error')
+        }
+      }
+    },
+    render (h) {
+      return h('div', this.n)
+    }
+  }
+
+  components.userWatcherCallbackAsync = {
+    props: ['n'],
+    watch: {
+      n () {
+        return Promise.reject(new Error('userWatcherCallback error'))
+      }
+    },
+    render (h) {
+      return h('div', this.n)
+    }
+  }
+
+  components.userImmediateWatcherCallbackAsync = {
+    props: ['n'],
+    watch: {
+      n: {
+        immediate: true,
+        handler () {
+          return Promise.reject(new Error('userImmediateWatcherCallback error'))
+        }
+      }
+    },
+    render (h) {
+      return h('div', this.n)
+    }
+  }
+
   // event errors
   components.event = {
     beforeCreate () {
@@ -247,6 +399,18 @@ function createErrorTestComponents () {
     }
   }
 
+  components.eventAsync = {
+    beforeCreate () {
+      this.$on('e', () => new Promise((resolve, reject) => reject(new Error('event'))))
+    },
+    mounted () {
+      this.$emit('e')
+    },
+    render (h) {
+      return h('div')
+    }
+  }
+
   return components
 }
 
diff --git a/test/unit/features/filter/filter.spec.js b/test/unit/features/filter/filter.spec.js
index 82c57a3d62e..854ea575064 100644
--- a/test/unit/features/filter/filter.spec.js
+++ b/test/unit/features/filter/filter.spec.js
@@ -194,4 +194,11 @@ describe('Filters', () => {
   it('support template string', () => {
     expect(parseFilters('`a | ${b}c` | d')).toBe('_f("d")(`a | ${b}c`)')
   })
+
+  it('bigint support', () => {
+    const vm = new Vue({
+      template: `<div>{{ BigInt(BigInt(10000000)) + BigInt(2000000000n) * 3000000n }}</div>`
+    }).$mount()
+    expect(vm.$el.textContent).toBe('6000000010000000')
+  })
 })
diff --git a/test/unit/features/global-api/config.spec.js b/test/unit/features/global-api/config.spec.js
index 1edfc3c7829..f2e5074ce72 100644
--- a/test/unit/features/global-api/config.spec.js
+++ b/test/unit/features/global-api/config.spec.js
@@ -55,4 +55,71 @@ describe('Global config', () => {
       Vue.config.ignoredElements = []
     })
   })
+
+  describe('async', () => {
+    it('does not update synchronously when true', () => {
+      const spy = jasmine.createSpy()
+      const vm = new Vue({
+        template: `<div :class="value"></div>`,
+        updated: spy,
+        data: { value: true }
+      }).$mount()
+      vm.value = false
+      expect(spy).not.toHaveBeenCalled()
+    })
+
+    it('updates synchronously when false', () => {
+      const spy = jasmine.createSpy()
+      Vue.config.async = false
+      const vm = new Vue({
+        template: `<div :class="value"></div>`,
+        updated: spy,
+        data: { value: true }
+      }).$mount()
+      vm.value = false
+      expect(spy).toHaveBeenCalled()
+      Vue.config.async = true
+    })
+
+    it('runs watchers in correct order when false', () => {
+      Vue.config.async = false
+      const vm = new Vue({
+        template: `
+          <div id="app">
+            {{ computed }}
+          </div>`,
+        props: ['prop'],
+        propsData: {
+          'prop': []
+        },
+        data: () => ({
+          data: ''
+        }),
+        computed: {
+          computed () {
+            return this.prop.join(',')
+          }
+        },
+        watch: {
+          prop: 'execute'
+        },
+        methods: {
+          execute () {
+            this.data = this.computed
+          }
+        }
+      }).$mount()
+      expect(vm.computed).toBe('')
+      expect(vm.data).toBe('')
+
+      vm.prop = [1, 2, 3]
+      expect(vm.computed).toBe('1,2,3')
+      expect(vm.data).toBe('1,2,3')
+
+      vm.prop.push(4, 5)
+      expect(vm.computed).toBe('1,2,3,4,5')
+      expect(vm.data).toBe('1,2,3,4,5')
+      Vue.config.async = true
+    })
+  })
 })
diff --git a/test/unit/features/global-api/extend.spec.js b/test/unit/features/global-api/extend.spec.js
index 4a4a73505b9..f0867ac1b5a 100644
--- a/test/unit/features/global-api/extend.spec.js
+++ b/test/unit/features/global-api/extend.spec.js
@@ -71,6 +71,25 @@ describe('Global API: extend', () => {
     expect(calls).toEqual([1, 2, 3])
   })
 
+  it('should not merge nested mixins created with Vue.extend', () => {
+    const A = Vue.extend({
+      created: () => {}
+    })
+    const B = Vue.extend({
+      mixins: [A],
+      created: () => {}
+    })
+    const C = Vue.extend({
+      extends: B,
+      created: () => {}
+    })
+    const D = Vue.extend({
+      mixins: [C],
+      created: () => {}
+    })
+    expect(D.options.created.length).toBe(4)
+  })
+
   it('should merge methods', () => {
     const A = Vue.extend({
       methods: {
diff --git a/test/unit/features/global-api/mixin.spec.js b/test/unit/features/global-api/mixin.spec.js
index bcf962402c2..14b65918c50 100644
--- a/test/unit/features/global-api/mixin.spec.js
+++ b/test/unit/features/global-api/mixin.spec.js
@@ -162,4 +162,36 @@ describe('Global API: mixin', () => {
     expect(base).toHaveBeenCalled()
     expect(injected).toHaveBeenCalled()
   })
+
+  // #8595
+  it('chain call', () => {
+    expect(Vue.mixin({})).toBe(Vue)
+  })
+
+  // #9198
+  it('should not mix global mixin lifecycle hook twice', () => {
+    const spy = jasmine.createSpy('global mixed in lifecycle hook')
+    Vue.mixin({
+      created: spy
+    })
+
+    const mixin1 = Vue.extend({
+      methods: {
+        a() {}
+      }
+    })
+
+    const mixin2 = Vue.extend({
+      mixins: [mixin1]
+    })
+
+    const Child = Vue.extend({
+      mixins: [mixin2],
+    })
+
+    const vm = new Child()
+
+    expect(typeof vm.$options.methods.a).toBe('function')
+    expect(spy.calls.count()).toBe(1)
+  })
 })
diff --git a/test/unit/features/global-api/observable.spec.js b/test/unit/features/global-api/observable.spec.js
new file mode 100644
index 00000000000..ecf2897d0a7
--- /dev/null
+++ b/test/unit/features/global-api/observable.spec.js
@@ -0,0 +1,30 @@
+import Vue from 'vue'
+
+describe('Global API: observable', () => {
+  it('should work', done => {
+    const state = Vue.observable({
+      count: 0
+    })
+
+    const app = new Vue({
+      render(h) {
+        return h('div', [
+          h('span', state.count),
+          h('button', {
+            on: {
+              click: () => {
+                state.count++
+              }
+            }
+          }, '+')
+        ])
+      }
+    }).$mount()
+
+    expect(app.$el.querySelector('span').textContent).toBe('0')
+    app.$el.querySelector('button').click()
+    waitForUpdate(() => {
+      expect(app.$el.querySelector('span').textContent).toBe('1')
+    }).then(done)
+  })
+})
diff --git a/test/unit/features/global-api/set-delete.spec.js b/test/unit/features/global-api/set-delete.spec.js
index d1c7f3d8709..59e75ae4dbe 100644
--- a/test/unit/features/global-api/set-delete.spec.js
+++ b/test/unit/features/global-api/set-delete.spec.js
@@ -14,7 +14,7 @@ describe('Global API: set/delete', () => {
       }).then(done)
     })
 
-    it('should update a observing object', done => {
+    it('should update an observing object', done => {
       const vm = new Vue({
         template: '<div>{{foo.x}}</div>',
         data: { foo: { x: 1 }}
@@ -26,7 +26,7 @@ describe('Global API: set/delete', () => {
       }).then(done)
     })
 
-    it('should update a observing array', done => {
+    it('should update an observing array', done => {
       const vm = new Vue({
         template: '<div><div v-for="v,k in list">{{k}}-{{v}}</div></div>',
         data: { list: ['a', 'b', 'c'] }
diff --git a/test/unit/features/global-api/use.spec.js b/test/unit/features/global-api/use.spec.js
index 00053f808a7..d54ff0750f3 100644
--- a/test/unit/features/global-api/use.spec.js
+++ b/test/unit/features/global-api/use.spec.js
@@ -49,4 +49,9 @@ describe('Global API: use', () => {
     expect(Vue.options.directives['plugin-test']).toBeUndefined()
     expect(Ctor2.options.directives['plugin-test']).toBe(def)
   })
+
+  // #8595
+  it('chain call', () => {
+    expect(Vue.use(() => {})).toBe(Vue)
+  })
 })
diff --git a/test/unit/features/instance/methods-data.spec.js b/test/unit/features/instance/methods-data.spec.js
index 8684c69eb3a..64050397abe 100644
--- a/test/unit/features/instance/methods-data.spec.js
+++ b/test/unit/features/instance/methods-data.spec.js
@@ -26,6 +26,9 @@ describe('Instance methods data', () => {
         data: {
           a: {
             b: 1
+          },
+          유니코드: {
+            なまえ: 'ok'
           }
         },
         methods: {
@@ -73,7 +76,7 @@ describe('Instance methods data', () => {
     })
 
     it('deep watch', done => {
-      var oldA = vm.a
+      const oldA = vm.a
       vm.$watch('a', spy, { deep: true })
       vm.a.b = 2
       waitForUpdate(() => {
@@ -85,7 +88,7 @@ describe('Instance methods data', () => {
     })
 
     it('handler option', done => {
-      var oldA = vm.a
+      const oldA = vm.a
       vm.$watch('a', {
         handler: spy,
         deep: true
@@ -108,6 +111,15 @@ describe('Instance methods data', () => {
       expect(spy).toHaveBeenCalledWith(1)
     })
 
+    it('handler option in string', () => {
+      vm.$watch('유니코드.なまえ', {
+        handler: 'foo',
+        immediate: true
+      })
+      expect(spy.calls.count()).toBe(1)
+      expect(spy).toHaveBeenCalledWith('ok')
+    })
+
     it('warn expression', () => {
       vm.$watch('a + b', spy)
       expect('Watcher only accepts simple dot-delimited paths').toHaveBeenWarned()
diff --git a/test/unit/features/instance/methods-events.spec.js b/test/unit/features/instance/methods-events.spec.js
index 88834577f26..47d15bd6a5c 100644
--- a/test/unit/features/instance/methods-events.spec.js
+++ b/test/unit/features/instance/methods-events.spec.js
@@ -56,6 +56,13 @@ describe('Instance methods events', () => {
     expect(spy).toHaveBeenCalledWith(1, 2, 3)
   })
 
+  it('$off event added by $once', () => {
+    vm.$once('test', spy)
+    vm.$off('test', spy) // test off event and this event added by once
+    vm.$emit('test', 1, 2, 3)
+    expect(spy).not.toHaveBeenCalled()
+  })
+
   it('$off', () => {
     vm.$on('test1', spy)
     vm.$on('test2', spy)
@@ -77,7 +84,7 @@ describe('Instance methods events', () => {
   })
 
   it('$off event + fn', () => {
-    var spy2 = jasmine.createSpy('emitter')
+    const spy2 = jasmine.createSpy('emitter')
     vm.$on('test', spy)
     vm.$on('test', spy2)
     vm.$off('test', spy)
diff --git a/test/unit/features/instance/methods-lifecycle.spec.js b/test/unit/features/instance/methods-lifecycle.spec.js
index 71525be2f0b..a2c5b86e920 100644
--- a/test/unit/features/instance/methods-lifecycle.spec.js
+++ b/test/unit/features/instance/methods-lifecycle.spec.js
@@ -1,4 +1,5 @@
 import Vue from 'vue'
+import Dep from 'core/observer/dep'
 
 describe('Instance methods lifecycle', () => {
   describe('$mount', () => {
@@ -32,6 +33,58 @@ describe('Instance methods lifecycle', () => {
       expect(vm.$el.tagName).toBe('DIV')
       expect(vm.$el.textContent).toBe('hi')
     })
+
+    it('Dep.target should be undefined in lifecycle', () => {
+      const vm = new Vue({
+        template: '<div><my-component></my-component></div>',
+        components: {
+          myComponent: {
+            template: '<div>hi</div>',
+            mounted () {
+              const _msg = this.msg
+              expect(Dep.target).toBe(undefined)
+            },
+            computed: {
+              msg () {
+                return 1
+              }
+            }
+          }
+        }
+      }).$mount()
+    })
+
+    it('Dep.target should be undefined during invocation of child immediate watcher', done => {
+      let calls = 0
+      const childData = { a: 1 }
+      const parentUpdate = jasmine.createSpy()
+      new Vue({
+        template: '<div><my-component></my-component></div>',
+        updated: parentUpdate,
+        components: {
+          myComponent: {
+            template: '<div>{{ a }}</div>',
+            data() {
+              return childData
+            },
+            watch: {
+              anything: {
+                handler() {
+                  ++calls
+                  this.a
+                },
+                immediate: true
+              }
+            }
+          }
+        }
+      }).$mount()
+      expect(calls).toBe(1)
+      childData.a++
+      waitForUpdate(() => {
+        expect(parentUpdate).not.toHaveBeenCalled()
+      }).then(done)
+    })
   })
 
   describe('$destroy', () => {
diff --git a/test/unit/features/instance/properties.spec.js b/test/unit/features/instance/properties.spec.js
index 02aca12fcfa..abe1cc62c16 100644
--- a/test/unit/features/instance/properties.spec.js
+++ b/test/unit/features/instance/properties.spec.js
@@ -149,15 +149,15 @@ describe('Instance properties', () => {
   // #6263
   it('$attrs should not be undefined when no props passed in', () => {
     const vm = new Vue({
-      template: `<foo/>`,
+      template: `<foo ref="foo" />`,
       data: { foo: 'foo' },
       components: {
         foo: {
-          template: `<div>{{ this.foo }}</div>`
+          template: `<div>foo</div>`
         }
       }
     }).$mount()
-    expect(vm.$attrs).toBeDefined()
+    expect(vm.$refs.foo.$attrs).toBeDefined()
   })
 
   it('warn mutating $attrs', () => {
diff --git a/test/unit/features/instance/render-proxy.spec.js b/test/unit/features/instance/render-proxy.spec.js
index d4d01ebcf2a..8da17172608 100644
--- a/test/unit/features/instance/render-proxy.spec.js
+++ b/test/unit/features/instance/render-proxy.spec.js
@@ -28,5 +28,66 @@ if (typeof Proxy !== 'undefined') {
       }).$mount()
       expect(`Property or method "a" is not defined`).not.toHaveBeenWarned()
     })
+
+    it('support symbols using the `in` operator in hand-written render functions', () => {
+      const sym = Symbol()
+
+      const vm = new Vue({
+        created () {
+          this[sym] = 'foo'
+        },
+        render (h) {
+          if (sym in this) {
+            return h('div', [this[sym]])
+          }
+        }
+      }).$mount()
+
+      expect(vm.$el.textContent).toBe('foo')
+    })
+
+    it('should warn properties starting with $ when found', () => {
+      new Vue({
+        data: { $a: 'foo' },
+        template: `<div>{{ $a }}</div>`
+      }).$mount()
+      expect(`Property "$a" must be accessed with "$data.$a"`).toHaveBeenWarned()
+    })
+
+    it('should warn properties starting with _ when found', () => {
+      new Vue({
+        data: { _foo: 'foo' },
+        template: `<div>{{ _foo }}</div>`
+      }).$mount()
+      expect(`Property "_foo" must be accessed with "$data._foo"`).toHaveBeenWarned()
+    })
+
+    it('should warn properties starting with $ when not found', () => {
+      new Vue({
+        template: `<div>{{ $a }}</div>`
+      }).$mount()
+      expect(`Property or method "$a" is not defined`).toHaveBeenWarned()
+      expect(`Property "$a" must be accessed with "$data.$a"`).not.toHaveBeenWarned()
+    })
+
+    it('should warn properties starting with $ when not found (with stripped)', () => {
+      const render = function (h) {
+        return h('p', this.$a)
+      }
+      render._withStripped = true
+      new Vue({
+        data: { $a: 'foo' },
+        render
+      }).$mount()
+      expect(`Property "$a" must be accessed with "$data.$a"`).toHaveBeenWarned()
+    })
+
+    it('should not warn properties starting with $ when using $data to access', () => {
+      new Vue({
+        data: { $a: 'foo' },
+        template: `<div>{{ $data.$a }}</div>`
+      }).$mount()
+      expect(`Property or method "$a" is not defined`).not.toHaveBeenWarned()
+    })
   })
 }
diff --git a/test/unit/features/options/computed.spec.js b/test/unit/features/options/computed.spec.js
index edc20bad3bf..17cd9516640 100644
--- a/test/unit/features/options/computed.spec.js
+++ b/test/unit/features/options/computed.spec.js
@@ -206,6 +206,18 @@ describe('Options computed', () => {
     expect(`computed property "a" is already defined as a prop`).toHaveBeenWarned()
   })
 
+  it('warn conflict with methods', () => {
+    new Vue({
+      computed: {
+        a: () => 2
+      },
+      methods: {
+        a: () => {}
+      }
+    })
+    expect(`computed property "a" is already defined as a method`).toHaveBeenWarned()
+  })
+
   it('rethrow computed error', () => {
     const vm = new Vue({
       computed: {
diff --git a/test/unit/features/options/data.spec.js b/test/unit/features/options/data.spec.js
index cb8a75ad18d..ac431bbd939 100644
--- a/test/unit/features/options/data.spec.js
+++ b/test/unit/features/options/data.spec.js
@@ -93,6 +93,38 @@ describe('Options data', () => {
     expect(vm.$refs.test.b).toBe(1)
   })
 
+  it('props should not be reactive', done => {
+    let calls = 0
+    const vm = new Vue({
+      template: `<child :msg="msg"></child>`,
+      data: {
+        msg: 'hello'
+      },
+      beforeUpdate () { calls++ },
+      components: {
+        child: {
+          template: `<span>{{ localMsg }}</span>`,
+          props: ['msg'],
+          data () {
+            return { localMsg: this.msg }
+          },
+          computed: {
+            computedMsg () {
+              return this.msg + ' world'
+            }
+          }
+        }
+      }
+    }).$mount()
+    const child = vm.$children[0]
+    vm.msg = 'hi'
+    waitForUpdate(() => {
+      expect(child.localMsg).toBe('hello')
+      expect(child.computedMsg).toBe('hi world')
+      expect(calls).toBe(1)
+    }).then(done)
+  })
+
   it('should have access to methods', () => {
     const vm = new Vue({
       methods: {
diff --git a/test/unit/features/options/directives.spec.js b/test/unit/features/options/directives.spec.js
index f15dd77f8e6..f7a69402d0b 100644
--- a/test/unit/features/options/directives.spec.js
+++ b/test/unit/features/options/directives.spec.js
@@ -265,4 +265,104 @@ describe('Options directives', () => {
       expect(dir.unbind.calls.argsFor(0)[0]).toBe(oldEl)
     }).then(done)
   })
+
+  it('dynamic arguments', done => {
+    const vm = new Vue({
+      template: `<div v-my:[key]="1"/>`,
+      data: {
+        key: 'foo'
+      },
+      directives: {
+        my: {
+          bind(el, binding) {
+            expect(binding.arg).toBe('foo')
+          },
+          update(el, binding) {
+            expect(binding.arg).toBe('bar')
+            expect(binding.oldArg).toBe('foo')
+            done()
+          }
+        }
+      }
+    }).$mount()
+    vm.key = 'bar'
+  })
+
+  it('deep object like `deep.a` as dynamic arguments', done => {
+    const vm = new Vue({
+      template: `<div v-my:[deep.a]="1"/>`,
+      data: {
+        deep: {
+          a: 'foo'
+        }
+      },
+      directives: {
+        my: {
+          bind(el, binding) {
+            expect(binding.arg).toBe('foo')
+          },
+          update(el, binding) {
+            expect(binding.arg).toBe('bar')
+            expect(binding.oldArg).toBe('foo')
+            done()
+          }
+        }
+      }
+    }).$mount()
+    vm.deep.a = 'bar'
+  })
+
+  it('deep object like `deep.a.b` as dynamic arguments', done => {
+    const vm = new Vue({
+      template: `<div v-my:[deep.a.b]="1"/>`,
+      data: {
+        deep: {
+          a: {
+            b: 'foo'
+          }
+        }
+      },
+      directives: {
+        my: {
+          bind(el, binding) {
+            expect(binding.arg).toBe('foo')
+          },
+          update(el, binding) {
+            expect(binding.arg).toBe('bar')
+            expect(binding.oldArg).toBe('foo')
+            done()
+          }
+        }
+      }
+    }).$mount()
+    vm.deep.a.b = 'bar'
+  })
+
+  it('deep object as dynamic arguments with modifiers', done => {
+    const vm = new Vue({
+      template: `<div v-my:[deep.a.b].x.y="1"/>`,
+      data: {
+        deep: {
+          a: {
+            b: 'foo'
+          }
+        }
+      },
+      directives: {
+        my: {
+          bind(el, binding) {
+            expect(binding.arg).toBe('foo')
+            expect(binding.modifiers.x).toBe(true)
+            expect(binding.modifiers.y).toBe(true)
+          },
+          update(el, binding) {
+            expect(binding.arg).toBe('bar')
+            expect(binding.oldArg).toBe('foo')
+            done()
+          }
+        }
+      }
+    }).$mount()
+    vm.deep.a.b = 'bar'
+  })
 })
diff --git a/test/unit/features/options/errorCaptured.spec.js b/test/unit/features/options/errorCaptured.spec.js
index d16c057da6f..0c1aba35b79 100644
--- a/test/unit/features/options/errorCaptured.spec.js
+++ b/test/unit/features/options/errorCaptured.spec.js
@@ -209,4 +209,190 @@ describe('Options errorCaptured', () => {
 
     expect(calls).toEqual([1, 2, 3])
   })
+
+  // ref: https://github.com/vuejs/vuex/issues/1505
+  it('should not add watchers to render deps if they are referred from errorCaptured callback', done => {
+    const store = new Vue({
+      data: {
+        errors: []
+      }
+    })
+
+    const Child = {
+      computed: {
+        test() {
+          throw new Error('render error')
+        }
+      },
+
+      render(h) {
+        return h('div', {
+          attrs: {
+            'data-test': this.test
+          }
+        })
+      }
+    }
+
+    new Vue({
+      errorCaptured(error) {
+        store.errors.push(error)
+      },
+      render: h => h(Child)
+    }).$mount()
+
+    // Ensure not to trigger infinite loop
+    waitForUpdate(() => {
+      expect(store.errors.length).toBe(1)
+      expect(store.errors[0]).toEqual(new Error('render error'))
+    }).then(done)
+  })
+
+  it('should capture error from watcher', done => {
+    const spy = jasmine.createSpy()
+
+    let child
+    let err
+    const Child = {
+      data () {
+        return {
+          foo: null
+        }
+      },
+      watch: {
+        foo () {
+          err = new Error('userWatcherCallback error')
+          throw err
+        }
+      },
+      created () {
+        child = this
+      },
+      render () {}
+    }
+
+    new Vue({
+      errorCaptured: spy,
+      render: h => h(Child)
+    }).$mount()
+
+    child.foo = 'bar'
+
+    waitForUpdate(() => {
+      expect(spy).toHaveBeenCalledWith(err, child, 'callback for watcher "foo"')
+      expect(globalSpy).toHaveBeenCalledWith(err, child, 'callback for watcher "foo"')
+    }).then(done)
+  })
+
+  it('should capture promise error from watcher', done => {
+    const spy = jasmine.createSpy()
+
+    let child
+    let err
+    const Child = {
+      data () {
+        return {
+          foo: null
+        }
+      },
+      watch: {
+        foo () {
+          err = new Error('userWatcherCallback error')
+          return Promise.reject(err)
+        }
+      },
+      created () {
+        child = this
+      },
+      render () {}
+    }
+
+    new Vue({
+      errorCaptured: spy,
+      render: h => h(Child)
+    }).$mount()
+
+    child.foo = 'bar'
+
+    child.$nextTick(() => {
+      waitForUpdate(() => {
+        expect(spy).toHaveBeenCalledWith(err, child, 'callback for watcher "foo" (Promise/async)')
+        expect(globalSpy).toHaveBeenCalledWith(err, child, 'callback for watcher "foo" (Promise/async)')
+      }).then(done)
+    })
+  })
+
+  it('should capture error from immediate watcher', done => {
+    const spy = jasmine.createSpy()
+
+    let child
+    let err
+    const Child = {
+      data () {
+        return {
+          foo: 'foo'
+        }
+      },
+      watch: {
+        foo: {
+          immediate: true,
+          handler () {
+            err = new Error('userImmediateWatcherCallback error')
+            throw err
+          }
+        }
+      },
+      created () {
+        child = this
+      },
+      render () {}
+    }
+
+    new Vue({
+      errorCaptured: spy,
+      render: h => h(Child)
+    }).$mount()
+
+    waitForUpdate(() => {
+      expect(spy).toHaveBeenCalledWith(err, child, 'callback for immediate watcher "foo"')
+      expect(globalSpy).toHaveBeenCalledWith(err, child, 'callback for immediate watcher "foo"')
+    }).then(done)
+  })
+
+  it('should capture promise error from immediate watcher', done => {
+    const spy = jasmine.createSpy()
+
+    let child
+    let err
+    const Child = {
+      data () {
+        return {
+          foo: 'foo'
+        }
+      },
+      watch: {
+        foo: {
+          immediate: true,
+          handler () {
+            err = new Error('userImmediateWatcherCallback error')
+            return Promise.reject(err)
+          }
+        }
+      },
+      created () {
+        child = this
+      },
+      render () {}
+    }
+
+    new Vue({
+      errorCaptured: spy,
+      render: h => h(Child)
+    }).$mount()
+
+    waitForUpdate(() => {
+      expect(spy).toHaveBeenCalledWith(err, child, 'callback for immediate watcher "foo" (Promise/async)')
+      expect(globalSpy).toHaveBeenCalledWith(err, child, 'callback for immediate watcher "foo" (Promise/async)')
+    }).then(done)
+  })
 })
diff --git a/test/unit/features/options/functional.spec.js b/test/unit/features/options/functional.spec.js
index 2c6abe95972..ea85eea8a7f 100644
--- a/test/unit/features/options/functional.spec.js
+++ b/test/unit/features/options/functional.spec.js
@@ -70,11 +70,34 @@ describe('Options functional', () => {
       }
     }).$mount()
 
+    document.body.appendChild(vm.$el)
     triggerEvent(vm.$el.children[0], 'click')
     expect(foo).toHaveBeenCalled()
     expect(foo.calls.argsFor(0)[0].type).toBe('click') // should have click event
     triggerEvent(vm.$el.children[0], 'mousedown')
     expect(bar).toHaveBeenCalledWith('bar')
+    document.body.removeChild(vm.$el)
+  })
+
+  it('should expose scopedSlots on render context', () => {
+    const vm = new Vue({
+      template: '<div><wrap>foo<p slot="p" slot-scope="a">{{ a }}</p></wrap></div>',
+      components: {
+        wrap: {
+          functional: true,
+          render (h, { scopedSlots }) {
+            return [
+              // scoped
+              scopedSlots.p('a'),
+              // normal slot content should be exposed as well
+              scopedSlots.default()
+            ]
+          }
+        }
+      }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('afoo')
   })
 
   it('should support returning more than one root node', () => {
@@ -244,8 +267,8 @@ describe('Options functional', () => {
 
   it('should work with render fns compiled from template', done => {
     // code generated via vue-template-es2015-compiler
-    var render = function (_h, _vm) {
-      var _c = _vm._c
+    const render = function (_h, _vm) {
+      const _c = _vm._c
       return _c(
         'div',
         [
@@ -261,9 +284,9 @@ describe('Options functional', () => {
         2
       )
     }
-    var staticRenderFns = [
+    const staticRenderFns = [
       function (_h, _vm) {
-        var _c = _vm._c
+        const _c = _vm._c
         return _c('div', [_vm._v('Some '), _c('span', [_vm._v('text')])])
       }
     ]
@@ -316,4 +339,25 @@ describe('Options functional', () => {
     triggerEvent(parent.$el.querySelector('.clickable'), 'click')
     waitForUpdate(assertMarkup).then(done)
   })
+
+  // #8468
+  it('should normalize nested arrays when use functional components with v-for', () => {
+    const Foo = {
+      functional: true,
+      props: {
+        name: {}
+      },
+      render (h, context) {
+        return [h('span', 'hi'), h('span', context.props.name)]
+      }
+    }
+    const vm = new Vue({
+      template: `<div><foo v-for="name in names" :name="name" /></div>`,
+      data: {
+        names: ['foo', 'bar']
+      },
+      components: { Foo }
+    }).$mount()
+    expect(vm.$el.innerHTML).toBe('<span>hi</span><span>foo</span><span>hi</span><span>bar</span>')
+  })
 })
diff --git a/test/unit/features/options/inject.spec.js b/test/unit/features/options/inject.spec.js
index cd5c7097f31..3b47ef566f0 100644
--- a/test/unit/features/options/inject.spec.js
+++ b/test/unit/features/options/inject.spec.js
@@ -188,6 +188,32 @@ describe('Options provide/inject', () => {
       }).$mount()
       expect(vm.$el.textContent).toBe('123')
     })
+
+    it('should merge symbol provide from mixins (functions)', () => {
+      const keyA = Symbol('foo')
+      const keyB = Symbol('bar')
+
+      const mixinA = { provide: () => ({ [keyA]: 'foo' }) }
+      const mixinB = { provide: () => ({ [keyB]: 'bar' }) }
+      const child = {
+        inject: {
+          foo: keyA,
+          bar: keyB
+        },
+        template: `<span/>`,
+        created () {
+          injected = [this.foo, this.bar]
+        }
+      }
+      new Vue({
+        mixins: [mixinA, mixinB],
+        render (h) {
+          return h(child)
+        }
+      }).$mount()
+
+      expect(injected).toEqual(['foo', 'bar'])
+    })
   }
 
   // GitHub issue #5223
@@ -635,4 +661,16 @@ describe('Options provide/inject', () => {
 
     expect(injected).toEqual('foo')
   })
+
+  // #7284
+  it('should not inject prototype properties', () => {
+    const vm = new Vue({
+      provide: {}
+    })
+    new Vue({
+      parent: vm,
+      inject: ['constructor']
+    })
+    expect(`Injection "constructor" not found`).toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/features/options/lifecycle.spec.js b/test/unit/features/options/lifecycle.spec.js
index 2b649aa98e4..6f48ba06368 100644
--- a/test/unit/features/options/lifecycle.spec.js
+++ b/test/unit/features/options/lifecycle.spec.js
@@ -137,6 +137,58 @@ describe('Options lifecycle hooks', () => {
         expect(spy).toHaveBeenCalled()
       }).then(done)
     })
+
+    it('should be called before render and allow mutating state', done => {
+      const vm = new Vue({
+        template: '<div>{{ msg }}</div>',
+        data: { msg: 'foo' },
+        beforeUpdate () {
+          this.msg += '!'
+        }
+      }).$mount()
+      expect(vm.$el.textContent).toBe('foo')
+      vm.msg = 'bar'
+      waitForUpdate(() => {
+        expect(vm.$el.textContent).toBe('bar!')
+      }).then(done)
+    })
+
+    // #8076
+    it('should not be called after destroy', done => {
+      const beforeUpdate = jasmine.createSpy('beforeUpdate')
+      const destroyed = jasmine.createSpy('destroyed')
+
+      Vue.component('todo', {
+        template: '<div>{{todo.done}}</div>',
+        props: ['todo'],
+        destroyed,
+        beforeUpdate
+      })
+
+      const vm = new Vue({
+        template: `
+          <div>
+            <todo v-for="t in pendingTodos" :todo="t" :key="t.id"></todo>
+          </div>
+        `,
+        data () {
+          return {
+            todos: [{ id: 1, done: false }]
+          }
+        },
+        computed: {
+          pendingTodos () {
+            return this.todos.filter(t => !t.done)
+          }
+        }
+      }).$mount()
+
+      vm.todos[0].done = true
+      waitForUpdate(() => {
+        expect(destroyed).toHaveBeenCalled()
+        expect(beforeUpdate).not.toHaveBeenCalled()
+      }).then(done)
+    })
   })
 
   describe('updated', () => {
@@ -184,6 +236,43 @@ describe('Options lifecycle hooks', () => {
         expect(calls).toEqual(['child', 'parent'])
       }).then(done)
     })
+
+    // #8076
+    it('should not be called after destroy', done => {
+      const updated = jasmine.createSpy('updated')
+      const destroyed = jasmine.createSpy('destroyed')
+
+      Vue.component('todo', {
+        template: '<div>{{todo.done}}</div>',
+        props: ['todo'],
+        destroyed,
+        updated
+      })
+
+      const vm = new Vue({
+        template: `
+          <div>
+            <todo v-for="t in pendingTodos" :todo="t" :key="t.id"></todo>
+          </div>
+        `,
+        data () {
+          return {
+            todos: [{ id: 1, done: false }]
+          }
+        },
+        computed: {
+          pendingTodos () {
+            return this.todos.filter(t => !t.done)
+          }
+        }
+      }).$mount()
+
+      vm.todos[0].done = true
+      waitForUpdate(() => {
+        expect(destroyed).toHaveBeenCalled()
+        expect(updated).not.toHaveBeenCalled()
+      }).then(done)
+    })
   })
 
   describe('beforeDestroy', () => {
diff --git a/test/unit/features/options/methods.spec.js b/test/unit/features/options/methods.spec.js
index 34f9ee88fc6..f1e5fc68b27 100644
--- a/test/unit/features/options/methods.spec.js
+++ b/test/unit/features/options/methods.spec.js
@@ -19,13 +19,13 @@ describe('Options methods', () => {
     expect(vm.a).toBe(2)
   })
 
-  it('should warn undefined methods', () => {
+  it('should warn methods of not function type', () => {
     new Vue({
       methods: {
-        hello: undefined
+        hello: {}
       }
     })
-    expect(`Method "hello" has an undefined value in the component definition`).toHaveBeenWarned()
+    expect('Method "hello" has type "object" in the component definition').toHaveBeenWarned()
   })
 
   it('should warn methods conflicting with data', () => {
diff --git a/test/unit/features/options/mixins.spec.js b/test/unit/features/options/mixins.spec.js
index 8385edfe03c..373f8867091 100644
--- a/test/unit/features/options/mixins.spec.js
+++ b/test/unit/features/options/mixins.spec.js
@@ -109,4 +109,36 @@ describe('Options mixins', () => {
     expect(vm.b).toBeDefined()
     expect(vm.$options.directives.c).toBeDefined()
   })
+
+  it('should accept further extended constructors as mixins', () => {
+    const spy1 = jasmine.createSpy('mixinA')
+    const spy2 = jasmine.createSpy('mixinB')
+
+    const mixinA = Vue.extend({
+      created: spy1,
+      directives: {
+        c: {}
+      },
+      methods: {
+        a: function () {}
+      }
+    })
+
+    const mixinB = mixinA.extend({
+      created: spy2
+    })
+
+    const vm = new Vue({
+      mixins: [mixinB],
+      methods: {
+        b: function () {}
+      }
+    })
+
+    expect(spy1).toHaveBeenCalledTimes(1)
+    expect(spy2).toHaveBeenCalledTimes(1)
+    expect(vm.a).toBeDefined()
+    expect(vm.b).toBeDefined()
+    expect(vm.$options.directives.c).toBeDefined()
+  })
 })
diff --git a/test/unit/features/options/name.spec.js b/test/unit/features/options/name.spec.js
index 2f586f85893..051ea403064 100644
--- a/test/unit/features/options/name.spec.js
+++ b/test/unit/features/options/name.spec.js
@@ -15,7 +15,7 @@ describe('Options name', () => {
     })
 
     /* eslint-disable */
-    expect(`Invalid component name: "Hyper*Vue". Component names can only contain alphanumeric characters and the hyphen, and must start with a letter.`)
+    expect(`Invalid component name: "Hyper*Vue".`)
       .toHaveBeenWarned()
     /* eslint-enable */
 
@@ -24,7 +24,7 @@ describe('Options name', () => {
     })
 
     /* eslint-disable */
-    expect(`Invalid component name: "2Cool2BValid". Component names can only contain alphanumeric characters and the hyphen, and must start with a letter.`)
+    expect(`Invalid component name: "2Cool2BValid".`)
       .toHaveBeenWarned()
     /* eslint-enable */
   })
@@ -37,4 +37,12 @@ describe('Options name', () => {
     expect(SuperComponent.options.components['SuperVue']).toEqual(SuperComponent)
     expect(SuperComponent.options.components['super-component']).toEqual(SuperComponent)
   })
+
+  it('should allow all potential custom element name for component name including non-alphanumeric characters', () => {
+    Vue.extend({
+      name: 'my-컴포넌트'
+    })
+
+    expect(`Invalid component name`).not.toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/features/options/props.spec.js b/test/unit/features/options/props.spec.js
index ae2baefff99..2ada45a0553 100644
--- a/test/unit/features/options/props.spec.js
+++ b/test/unit/features/options/props.spec.js
@@ -171,42 +171,56 @@ describe('Options props', () => {
       makeInstance('hello', String)
       expect(console.error.calls.count()).toBe(0)
       makeInstance(123, String)
-      expect('Expected String').toHaveBeenWarned()
+      expect('Expected String with value "123", got Number with value 123').toHaveBeenWarned()
     })
 
     it('number', () => {
       makeInstance(123, Number)
       expect(console.error.calls.count()).toBe(0)
       makeInstance('123', Number)
-      expect('Expected Number').toHaveBeenWarned()
+      expect('Expected Number with value 123, got String with value "123"').toHaveBeenWarned()
+    })
+
+    it('number & boolean', () => {
+      makeInstance(123, Number)
+      expect(console.error.calls.count()).toBe(0)
+      makeInstance(false, Number)
+      expect('Expected Number, got Boolean with value false').toHaveBeenWarned()
+    })
+
+    it('string & boolean', () => {
+      makeInstance('hello', String)
+      expect(console.error.calls.count()).toBe(0)
+      makeInstance(true, String)
+      expect('Expected String, got Boolean with value true').toHaveBeenWarned()
     })
 
     it('boolean', () => {
       makeInstance(true, Boolean)
       expect(console.error.calls.count()).toBe(0)
       makeInstance('123', Boolean)
-      expect('Expected Boolean').toHaveBeenWarned()
+      expect('Expected Boolean, got String with value "123"').toHaveBeenWarned()
     })
 
     it('function', () => {
       makeInstance(() => {}, Function)
       expect(console.error.calls.count()).toBe(0)
       makeInstance(123, Function)
-      expect('Expected Function').toHaveBeenWarned()
+      expect('Expected Function, got Number with value 123').toHaveBeenWarned()
     })
 
     it('object', () => {
       makeInstance({}, Object)
       expect(console.error.calls.count()).toBe(0)
       makeInstance([], Object)
-      expect('Expected Object').toHaveBeenWarned()
+      expect('Expected Object, got Array').toHaveBeenWarned()
     })
 
     it('array', () => {
       makeInstance([], Array)
       expect(console.error.calls.count()).toBe(0)
       makeInstance({}, Array)
-      expect('Expected Array').toHaveBeenWarned()
+      expect('Expected Array, got Object').toHaveBeenWarned()
     })
 
     it('primitive wrapper objects', () => {
@@ -225,7 +239,27 @@ describe('Options props', () => {
         makeInstance(Symbol('foo'), Symbol)
         expect(console.error.calls.count()).toBe(0)
         makeInstance({}, Symbol)
-        expect('Expected Symbol').toHaveBeenWarned()
+        expect('Expected Symbol, got Object').toHaveBeenWarned()
+      })
+
+      it('warns when expected an explicable type but Symbol was provided', () => {
+        makeInstance(Symbol('foo'), String)
+        expect('Expected String, got Symbol').toHaveBeenWarned()
+      })
+
+      it('warns when expected an explicable type but Symbol was provided', () => {
+        makeInstance(Symbol('foo'), [String, Number])
+        expect('Expected String, Number, got Symbol').toHaveBeenWarned()
+      })
+    }
+	
+    if (typeof BigInt !== 'undefined') {
+      /* global BigInt */
+      it('bigint', () => {
+        makeInstance(BigInt(100), BigInt)
+        expect(console.error.calls.count()).toBe(0)
+        makeInstance({}, BigInt)
+        expect('Expected BigInt, got Object').toHaveBeenWarned()
       })
     }
 
@@ -257,7 +291,7 @@ describe('Options props', () => {
       makeInstance(123, Number, v => v === 234)
       expect('custom validator check failed').toHaveBeenWarned()
       makeInstance(123, String, v => v === 123)
-      expect('Expected String').toHaveBeenWarned()
+      expect('Expected String with value "123", got Number with value 123').toHaveBeenWarned()
     })
 
     it('multiple types + custom validator', () => {
@@ -512,4 +546,37 @@ describe('Options props', () => {
       expect(`"${attr}" is a reserved attribute`).toHaveBeenWarned()
     })
   })
+
+  it('should consider order when casting [Boolean, String] multi-type props', () => {
+    const vm = new Vue({
+      template: '<test ref="test" booleanOrString stringOrBoolean />',
+      components: {
+        test: {
+          template: '<div></div>',
+          props: {
+            booleanOrString: [Boolean, String],
+            stringOrBoolean: [String, Boolean]
+          }
+        }
+      }
+    }).$mount()
+    expect(vm.$refs.test.$props.booleanOrString).toBe(true)
+    expect(vm.$refs.test.$props.stringOrBoolean).toBe('')
+  })
+
+  it('should warn when a prop type is not a constructor', () => {
+    const vm = new Vue({
+      template: '<div>{{a}}</div>',
+      props: {
+        a: {
+          type: 'String',
+          default: 'test'
+        }
+      }
+    }).$mount()
+    expect(
+      'Invalid prop type: "String" is not a constructor'
+    ).toHaveBeenWarned()
+  })
+
 })
diff --git a/test/unit/features/options/watch.spec.js b/test/unit/features/options/watch.spec.js
index e16b2f8312d..3938bd33c92 100644
--- a/test/unit/features/options/watch.spec.js
+++ b/test/unit/features/options/watch.spec.js
@@ -1,5 +1,6 @@
 import Vue from 'vue'
 import testObjectOption from '../../../helpers/test-object-option'
+import { finished } from 'stream';
 
 describe('Options watch', () => {
   let spy
@@ -106,9 +107,9 @@ describe('Options watch', () => {
   })
 
   it('correctly merges multiple extends', done => {
-    var spy2 = jasmine.createSpy('A')
-    var spy3 = jasmine.createSpy('B')
-    var A = Vue.extend({
+    const spy2 = jasmine.createSpy('A')
+    const spy3 = jasmine.createSpy('B')
+    const A = Vue.extend({
       data: function () {
         return {
           a: 0,
@@ -120,21 +121,21 @@ describe('Options watch', () => {
       }
     })
 
-    var B = Vue.extend({
+    const B = Vue.extend({
       extends: A,
       watch: {
         a: spy2
       }
     })
 
-    var C = Vue.extend({
+    const C = Vue.extend({
       extends: B,
       watch: {
         a: spy3
       }
     })
 
-    var vm = new C()
+    const vm = new C()
     vm.a = 1
 
     waitForUpdate(() => {
@@ -143,4 +144,35 @@ describe('Options watch', () => {
       expect(spy3).toHaveBeenCalledWith(1, 0)
     }).then(done)
   })
+
+  it('should support watching unicode paths', done => {
+    const vm = new Vue({
+      data: {
+        数据: 1
+      },
+      watch: {
+        数据: spy
+      }
+    })
+    expect(spy).not.toHaveBeenCalled()
+    vm['数据'] = 2
+    expect(spy).not.toHaveBeenCalled()
+    waitForUpdate(() => {
+      expect(spy).toHaveBeenCalledWith(2, 1)
+    }).then(done)
+  })
+
+  it('should not warn proper usage', () => {
+    const vm = new Vue({
+      data: {
+        foo: { _bar: 1 }, // element has such watchers...
+        prop1: 123
+      },
+      watch: {
+        'foo._bar': () => {},
+        prop1 () {}
+      }
+    })
+    expect(`Failed watching path`).not.toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/features/ref.spec.js b/test/unit/features/ref.spec.js
index 05efc4d5244..971c8fbe678 100644
--- a/test/unit/features/ref.spec.js
+++ b/test/unit/features/ref.spec.js
@@ -9,6 +9,10 @@ describe('ref', () => {
     test2: {
       id: 'test2',
       template: '<div>test2</div>'
+    },
+    test3: {
+      id: 'test3',
+      template: '<div>test3</div>'
     }
   }
 
@@ -20,6 +24,7 @@ describe('ref', () => {
       template: `<div>
         <test ref="foo"></test>
         <test2 :ref="value"></test2>
+        <test3 :ref="0"></test3>
       </div>`,
       components
     })
@@ -28,6 +33,8 @@ describe('ref', () => {
     expect(vm.$refs.foo.$options.id).toBe('test')
     expect(vm.$refs.bar).toBeTruthy()
     expect(vm.$refs.bar.$options.id).toBe('test2')
+    expect(vm.$refs['0']).toBeTruthy()
+    expect(vm.$refs['0'].$options.id).toBe('test3')
   })
 
   it('should dynamically update refs', done => {
diff --git a/test/unit/features/transition/inject-styles.js b/test/unit/features/transition/inject-styles.js
index 2304e3d5924..34185096f62 100644
--- a/test/unit/features/transition/inject-styles.js
+++ b/test/unit/features/transition/inject-styles.js
@@ -1,5 +1,5 @@
 function insertCSS (text) {
-  var cssEl = document.createElement('style')
+  const cssEl = document.createElement('style')
   cssEl.textContent = text.trim()
   document.head.appendChild(cssEl)
 }
diff --git a/test/unit/features/transition/transition-mode.spec.js b/test/unit/features/transition/transition-mode.spec.js
index 6e4f5be06ca..f8afca82f5e 100644
--- a/test/unit/features/transition/transition-mode.spec.js
+++ b/test/unit/features/transition/transition-mode.spec.js
@@ -457,7 +457,7 @@ if (!isIE9) {
             setTimeout(() => {
               resolve({ template: '<div><h1>component B</h1></div>' })
               Vue.nextTick(next)
-            }, (duration + buffer) * 1.5)
+            }, (duration + buffer) * 1.7)
           }
         },
         data: {
diff --git a/test/unit/features/transition/transition.spec.js b/test/unit/features/transition/transition.spec.js
index f7b08e376a5..6bfc8e7e53b 100644
--- a/test/unit/features/transition/transition.spec.js
+++ b/test/unit/features/transition/transition.spec.js
@@ -842,7 +842,7 @@ if (!isIE9) {
       }).then(done)
     })
 
-    it('transition inside child component', done => {
+    it('transition inside child component with v-if', done => {
       const vm = new Vue({
         template: `
           <div>
@@ -872,14 +872,126 @@ if (!isIE9) {
         expect(vm.$el.children.length).toBe(0)
         vm.ok = true
       }).then(() => {
-        expect(vm.$el.children[0].className).toBe('test v-enter v-enter-active')
+        expect(vm.$el.children[0].className).toBe('test')
+      }).then(done)
+    })
+
+    it('transition with appear inside child component with v-if', done => {
+      const vm = new Vue({
+        template: `
+          <div>
+            <test v-if="ok" class="test"></test>
+          </div>
+        `,
+        data: { ok: true },
+        components: {
+          test: {
+            template: `
+              <transition appear
+                appear-class="test-appear"
+                appear-to-class="test-appear-to"
+                appear-active-class="test-appear-active">
+                <div>foo</div>
+              </transition>
+            `
+          }
+        }
+      }).$mount(el)
+
+      waitForUpdate(() => {
+        expect(vm.$el.children[0].className).toBe('test test-appear test-appear-active')
       }).thenWaitFor(nextFrame).then(() => {
-        expect(vm.$el.children[0].className).toBe('test v-enter-active v-enter-to')
+        expect(vm.$el.children[0].className).toBe('test test-appear-active test-appear-to')
+      }).thenWaitFor(duration + buffer).then(() => {
+        expect(vm.$el.children[0].className).toBe('test')
+        vm.ok = false
+      }).then(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave v-leave-active')
+      }).thenWaitFor(nextFrame).then(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave-active v-leave-to')
+      }).thenWaitFor(duration + buffer).then(() => {
+        expect(vm.$el.children.length).toBe(0)
+      }).then(done)
+    })
+
+    it('transition inside nested child component with v-if', done => {
+      const vm = new Vue({
+        template: `
+          <div>
+            <foo v-if="ok" class="test"></foo>
+          </div>
+        `,
+        data: { ok: true },
+        components: {
+          foo: {
+            template: '<bar></bar>',
+            components: {
+              bar: {
+                template: '<transition><div>foo</div></transition>'
+              }
+            }
+          }
+        }
+      }).$mount(el)
+
+      // should not apply transition on initial render by default
+      expect(vm.$el.innerHTML).toBe('<div class="test">foo</div>')
+      vm.ok = false
+      waitForUpdate(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave v-leave-active')
+      }).thenWaitFor(nextFrame).then(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave-active v-leave-to')
       }).thenWaitFor(duration + buffer).then(() => {
+        expect(vm.$el.children.length).toBe(0)
+        vm.ok = true
+      }).then(() => {
         expect(vm.$el.children[0].className).toBe('test')
       }).then(done)
     })
 
+    it('transition with appear inside nested child component with v-if', done => {
+      const vm = new Vue({
+        template: `
+          <div>
+            <foo v-if="ok" class="test"></foo>
+          </div>
+        `,
+        data: { ok: true },
+        components: {
+          foo: {
+            template: '<bar></bar>',
+            components: {
+              bar: {
+                template: `
+                  <transition appear
+                    appear-class="test-appear"
+                    appear-to-class="test-appear-to"
+                    appear-active-class="test-appear-active">
+                    <div>foo</div>
+                  </transition>
+                `
+              }
+            }
+          }
+        }
+      }).$mount(el)
+
+      waitForUpdate(() => {
+        expect(vm.$el.children[0].className).toBe('test test-appear test-appear-active')
+      }).thenWaitFor(nextFrame).then(() => {
+        expect(vm.$el.children[0].className).toBe('test test-appear-active test-appear-to')
+      }).thenWaitFor(duration + buffer).then(() => {
+        expect(vm.$el.children[0].className).toBe('test')
+        vm.ok = false
+      }).then(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave v-leave-active')
+      }).thenWaitFor(nextFrame).then(() => {
+        expect(vm.$el.children[0].className).toBe('test v-leave-active v-leave-to')
+      }).thenWaitFor(duration + buffer).then(() => {
+        expect(vm.$el.children.length).toBe(0)
+      }).then(done)
+    })
+
     it('custom transition higher-order component', done => {
       const vm = new Vue({
         template: '<div><my-transition><div v-if="ok" class="test">foo</div></my-transition></div>',
@@ -1167,5 +1279,27 @@ if (!isIE9) {
         expect(vm.$el.innerHTML).toBe('<!---->')
       }).then(done)
     })
+
+    // #8199
+    it('should not throw error when replaced by v-html contents', (done) => {
+      const vm = new Vue({
+        template: `
+          <div>
+            <div v-if="ok" :class="ok">
+              <transition>
+                <span>a</span>
+              </transition>
+            </div>
+            <div v-else v-html="ok"></div>
+          </div>
+        `,
+        data: { ok: true }
+      }).$mount(el)
+
+      vm.ok = false
+      waitForUpdate(() => {
+        expect(vm.$el.children[0].innerHTML).toBe('false')
+      }).then(done)
+    })
   })
 }
diff --git a/test/unit/karma.base.config.js b/test/unit/karma.base.config.js
index b3f0df261de..700ad6c093c 100644
--- a/test/unit/karma.base.config.js
+++ b/test/unit/karma.base.config.js
@@ -1,7 +1,9 @@
-var alias = require('../../scripts/alias')
-var webpack = require('webpack')
+const alias = require('../../scripts/alias')
+const featureFlags = require('../../scripts/feature-flags')
+const webpack = require('webpack')
 
-var webpackConfig = {
+const webpackConfig = {
+  mode: 'development',
   resolve: {
     alias: alias
   },
@@ -18,9 +20,9 @@ var webpackConfig = {
     new webpack.DefinePlugin({
       __WEEX__: false,
       'process.env': {
-        NODE_ENV: '"development"',
         TRANSITION_DURATION: process.env.CI ? 100 : 50,
-        TRANSITION_BUFFER: 10
+        TRANSITION_BUFFER: 10,
+        ...featureFlags
       }
     })
   ],
diff --git a/test/unit/karma.cover.config.js b/test/unit/karma.cover.config.js
index 360252a6d54..639cec462cb 100644
--- a/test/unit/karma.cover.config.js
+++ b/test/unit/karma.cover.config.js
@@ -1,8 +1,16 @@
-var base = require('./karma.base.config.js')
+const base = require('./karma.base.config.js')
+
+process.env.CHROME_BIN = require('puppeteer').executablePath()
 
 module.exports = function (config) {
-  var options = Object.assign(base, {
-    browsers: ['PhantomJS'],
+  const options = Object.assign(base, {
+    browsers: ['ChromeHeadlessCI'],
+    customLaunchers: {
+      'ChromeHeadlessCI': {
+        base: 'ChromeHeadless',
+        flags: ['--no-sandbox']
+      }
+    },
     reporters: ['mocha', 'coverage'],
     coverageReporter: {
       reporters: [
@@ -13,7 +21,7 @@ module.exports = function (config) {
     singleRun: true,
     plugins: base.plugins.concat([
       'karma-coverage',
-      'karma-phantomjs-launcher'
+      'karma-chrome-launcher'
     ])
   })
 
diff --git a/test/unit/karma.dev.config.js b/test/unit/karma.dev.config.js
index 9285861e27b..b9b01b2200c 100644
--- a/test/unit/karma.dev.config.js
+++ b/test/unit/karma.dev.config.js
@@ -1,11 +1,13 @@
-var base = require('./karma.base.config.js')
+const base = require('./karma.base.config.js')
+
+process.env.CHROME_BIN = require('puppeteer').executablePath()
 
 module.exports = function (config) {
   config.set(Object.assign(base, {
-    browsers: ['PhantomJS'],
+    browsers: ['ChromeHeadless'],
     reporters: ['progress'],
     plugins: base.plugins.concat([
-      'karma-phantomjs-launcher'
+      'karma-chrome-launcher'
     ])
   }))
 }
diff --git a/test/unit/karma.sauce.config.js b/test/unit/karma.sauce.config.js
index 55672b56778..0c4ab2270b1 100644
--- a/test/unit/karma.sauce.config.js
+++ b/test/unit/karma.sauce.config.js
@@ -1,5 +1,5 @@
-var webpack = require('webpack')
-var base = require('./karma.base.config.js')
+const webpack = require('webpack')
+const base = require('./karma.base.config.js')
 
 base.webpack.plugins = [
   new webpack.DefinePlugin({
@@ -19,7 +19,7 @@ base.webpack.plugins = [
  * smaller batches.
  */
 
-var batches = [
+const batches = [
   // the cool kids
   {
     sl_chrome: {
@@ -79,7 +79,7 @@ var batches = [
 ]
 
 module.exports = function (config) {
-  var batch = batches[process.argv[4] || 0]
+  const batch = batches[process.argv[4] || 0]
 
   config.set(Object.assign(base, {
     singleRun: true,
diff --git a/test/unit/karma.unit.config.js b/test/unit/karma.unit.config.js
index 7840df74e25..a9337064a9d 100644
--- a/test/unit/karma.unit.config.js
+++ b/test/unit/karma.unit.config.js
@@ -1,4 +1,4 @@
-var base = require('./karma.base.config.js')
+const base = require('./karma.base.config.js')
 
 module.exports = function (config) {
   config.set(Object.assign(base, {
diff --git a/test/unit/modules/compiler/codeframe.spec.js b/test/unit/modules/compiler/codeframe.spec.js
new file mode 100644
index 00000000000..318bcdc84df
--- /dev/null
+++ b/test/unit/modules/compiler/codeframe.spec.js
@@ -0,0 +1,74 @@
+import { generateCodeFrame } from 'compiler/codeframe'
+
+describe('codeframe', () => {
+  const source = `
+<div>
+  <template key="one"></template>
+  <ul>
+    <li v-for="foobar">hi</li>
+  </ul>
+  <template key="two"></template>
+</div>
+    `.trim()
+
+  it('line near top', () => {
+    const keyStart = source.indexOf(`key="one"`)
+    const keyEnd = keyStart + `key="one"`.length
+    expect(generateCodeFrame(source, keyStart, keyEnd)).toBe(`
+1  |  <div>
+2  |    <template key="one"></template>
+   |              ^^^^^^^^^
+3  |    <ul>
+4  |      <li v-for="foobar">hi</li>
+    `.trim())
+  })
+
+  it('line in middle', () => {
+    // should cover 5 lines
+    const forStart = source.indexOf(`v-for=`)
+    const forEnd = forStart + `v-for="foobar"`.length
+    expect(generateCodeFrame(source, forStart, forEnd)).toBe(`
+2  |    <template key="one"></template>
+3  |    <ul>
+4  |      <li v-for="foobar">hi</li>
+   |          ^^^^^^^^^^^^^^
+5  |    </ul>
+6  |    <template key="two"></template>
+    `.trim())
+  })
+
+  it('line near bottom', () => {
+    const keyStart = source.indexOf(`key="two"`)
+    const keyEnd = keyStart + `key="two"`.length
+    expect(generateCodeFrame(source, keyStart, keyEnd)).toBe(`
+4  |      <li v-for="foobar">hi</li>
+5  |    </ul>
+6  |    <template key="two"></template>
+   |              ^^^^^^^^^
+7  |  </div>
+    `.trim())
+  })
+
+  it('multi-line highlights', () => {
+    const source = `
+<div attr="some
+  multiline
+attr
+">
+</div>
+    `.trim()
+
+    const attrStart = source.indexOf(`attr=`)
+    const attrEnd = source.indexOf(`">`) + 1
+    expect(generateCodeFrame(source, attrStart, attrEnd)).toBe(`
+1  |  <div attr="some
+   |       ^^^^^^^^^^
+2  |    multiline
+   |  ^^^^^^^^^^^
+3  |  attr
+   |  ^^^^
+4  |  ">
+   |  ^
+    `.trim())
+  })
+})
diff --git a/test/unit/modules/compiler/codegen.spec.js b/test/unit/modules/compiler/codegen.spec.js
index b1085a571df..a31f751d64e 100644
--- a/test/unit/modules/compiler/codegen.spec.js
+++ b/test/unit/modules/compiler/codegen.spec.js
@@ -44,28 +44,35 @@ describe('codegen', () => {
     )
   })
 
+  it('generate filters with no arguments', () => {
+    assertCodegen(
+      '<div>{{ d | e() }}</div>',
+      `with(this){return _c('div',[_v(_s(_f("e")(d)))])}`
+    )
+  })
+
   it('generate v-for directive', () => {
     assertCodegen(
       '<div><li v-for="item in items" :key="item.uid"></li></div>',
-      `with(this){return _c('div',_l((items),function(item){return _c('li',{key:item.uid})}))}`
+      `with(this){return _c('div',_l((items),function(item){return _c('li',{key:item.uid})}),0)}`
     )
     // iterator syntax
     assertCodegen(
       '<div><li v-for="(item, i) in items"></li></div>',
-      `with(this){return _c('div',_l((items),function(item,i){return _c('li')}))}`
+      `with(this){return _c('div',_l((items),function(item,i){return _c('li')}),0)}`
     )
     assertCodegen(
       '<div><li v-for="(item, key, index) in items"></li></div>',
-      `with(this){return _c('div',_l((items),function(item,key,index){return _c('li')}))}`
+      `with(this){return _c('div',_l((items),function(item,key,index){return _c('li')}),0)}`
     )
     // destructuring
     assertCodegen(
       '<div><li v-for="{ a, b } in items"></li></div>',
-      `with(this){return _c('div',_l((items),function({ a, b }){return _c('li')}))}`
+      `with(this){return _c('div',_l((items),function({ a, b }){return _c('li')}),0)}`
     )
     assertCodegen(
       '<div><li v-for="({ a, b }, key, index) in items"></li></div>',
-      `with(this){return _c('div',_l((items),function({ a, b },key,index){return _c('li')}))}`
+      `with(this){return _c('div',_l((items),function({ a, b },key,index){return _c('li')}),0)}`
     )
     // v-for with extra element
     assertCodegen(
@@ -119,7 +126,7 @@ describe('codegen', () => {
   it('generate ref on v-for', () => {
     assertCodegen(
       '<ul><li v-for="item in items" ref="component1"></li></ul>',
-      `with(this){return _c('ul',_l((items),function(item){return _c('li',{ref:"component1",refInFor:true})}))}`
+      `with(this){return _c('ul',_l((items),function(item){return _c('li',{ref:"component1",refInFor:true})}),0)}`
     )
   })
 
@@ -144,6 +151,27 @@ describe('codegen', () => {
     )
   })
 
+  it('generate v-model directive', () => {
+    assertCodegen(
+      '<input v-model="test">',
+      `with(this){return _c('input',{directives:[{name:"model",rawName:"v-model",value:(test),expression:"test"}],domProps:{"value":(test)},on:{"input":function($event){if($event.target.composing)return;test=$event.target.value}}})}`
+    )
+  })
+
+  it('generate multiline v-model directive', () => {
+    assertCodegen(
+      '<input v-model="\n test \n">',
+      `with(this){return _c('input',{directives:[{name:"model",rawName:"v-model",value:(\n test \n),expression:"\\n test \\n"}],domProps:{"value":(\n test \n)},on:{"input":function($event){if($event.target.composing)return;\n test \n=$event.target.value}}})}`
+    )
+  })
+
+  it('generate multiline v-model directive on custom component', () => {
+    assertCodegen(
+      '<my-component v-model="\n test \n" />',
+      `with(this){return _c('my-component',{model:{value:(\n test \n),callback:function ($$v) {\n test \n=$$v},expression:"\\n test \\n"}})}`
+    )
+  })
+
   it('generate template tag', () => {
     assertCodegen(
       '<div><template><p>{{hello}}</p></template></div>',
@@ -168,7 +196,7 @@ describe('codegen', () => {
   it('generate slot fallback content', () => {
     assertCodegen(
       '<div><slot><div>hi</div></slot></div>',
-      `with(this){return _c('div',[_t("default",[_c('div',[_v("hi")])])],2)}`
+      `with(this){return _c('div',[_t("default",function(){return [_c('div',[_v("hi")])]})],2)}`
     )
   })
 
@@ -201,6 +229,31 @@ describe('codegen', () => {
     )
   })
 
+  it('generate dynamic scoped slot', () => {
+    assertCodegen(
+      '<foo><template :slot="foo" slot-scope="bar">{{ bar }}</template></foo>',
+      `with(this){return _c('foo',{scopedSlots:_u([{key:foo,fn:function(bar){return [_v(_s(bar))]}}],null,true)})}`
+    )
+  })
+
+  it('generate scoped slot with multiline v-if', () => {
+    assertCodegen(
+      '<foo><template v-if="\nshow\n" slot-scope="bar">{{ bar }}</template></foo>',
+      `with(this){return _c('foo',{scopedSlots:_u([{key:"default",fn:function(bar){return (\nshow\n)?[_v(_s(bar))]:undefined}}],null,true)})}`
+    )
+    assertCodegen(
+      '<foo><div v-if="\nshow\n" slot="foo" slot-scope="bar">{{ bar }}</div></foo>',
+      `with(this){return _c(\'foo\',{scopedSlots:_u([{key:"foo",fn:function(bar){return (\nshow\n)?_c(\'div\',{},[_v(_s(bar))]):_e()}}],null,true)})}`
+    )
+  })
+
+  it('generate scoped slot with new slot syntax', () => {
+    assertCodegen(
+      '<foo><template v-if="show" #default="bar">{{ bar }}</template></foo>',
+      `with(this){return _c('foo',{scopedSlots:_u([(show)?{key:"default",fn:function(bar){return [_v(_s(bar))]}}:null],null,true)})}`
+    )
+  })
+
   it('generate class binding', () => {
     // static
     assertCodegen(
@@ -262,45 +315,105 @@ describe('codegen', () => {
     )
   })
 
+  it('generate events with method call', () => {
+    assertCodegen(
+      '<input @input="onInput($event);">',
+      `with(this){return _c('input',{on:{"input":function($event){return onInput($event);}}})}`
+    )
+    // empty arguments
+    assertCodegen(
+      '<input @input="onInput();">',
+      `with(this){return _c('input',{on:{"input":function($event){return onInput();}}})}`
+    )
+    // without semicolon
+    assertCodegen(
+      '<input @input="onInput($event)">',
+      `with(this){return _c('input',{on:{"input":function($event){return onInput($event)}}})}`
+    )
+    // multiple args
+    assertCodegen(
+      '<input @input="onInput($event, \'abc\', 5);">',
+      `with(this){return _c('input',{on:{"input":function($event){return onInput($event, 'abc', 5);}}})}`
+    )
+    // expression in args
+    assertCodegen(
+      '<input @input="onInput($event, 2+2);">',
+      `with(this){return _c('input',{on:{"input":function($event){return onInput($event, 2+2);}}})}`
+    )
+    // tricky symbols in args
+    assertCodegen(
+      `<input @input="onInput(');[\\'());');">`,
+      `with(this){return _c('input',{on:{"input":function($event){onInput(');[\\'());');}}})}`
+    )
+    // function name including a `function` part (#9920)
+    assertCodegen(
+      '<input @input="functionName()">',
+      `with(this){return _c('input',{on:{"input":function($event){return functionName()}}})}`
+    )
+  })
+
+  it('generate events with multiple statements', () => {
+    // normal function
+    assertCodegen(
+      '<input @input="onInput1();onInput2()">',
+      `with(this){return _c('input',{on:{"input":function($event){onInput1();onInput2()}}})}`
+    )
+    // function with multiple args
+    assertCodegen(
+      '<input @input="onInput1($event, \'text\');onInput2(\'text2\', $event)">',
+      `with(this){return _c('input',{on:{"input":function($event){onInput1($event, 'text');onInput2('text2', $event)}}})}`
+    )
+  })
+
   it('generate events with keycode', () => {
     assertCodegen(
       '<input @input.enter="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){if(!('button' in $event)&&_k($event.keyCode,"enter",13,$event.key))return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"enter",13,$event.key,"Enter"))return null;return onInput.apply(null, arguments)}}})}`
     )
     // multiple keycodes (delete)
     assertCodegen(
       '<input @input.delete="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){if(!('button' in $event)&&_k($event.keyCode,"delete",[8,46],$event.key))return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"delete",[8,46],$event.key,["Backspace","Delete","Del"]))return null;return onInput.apply(null, arguments)}}})}`
+    )
+    // multiple keycodes (esc)
+    assertCodegen(
+      '<input @input.esc="onInput">',
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"esc",27,$event.key,["Esc","Escape"]))return null;return onInput.apply(null, arguments)}}})}`
+    )
+    // multiple keycodes (space)
+    assertCodegen(
+      '<input @input.space="onInput">',
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"space",32,$event.key,[" ","Spacebar"]))return null;return onInput.apply(null, arguments)}}})}`
     )
     // multiple keycodes (chained)
     assertCodegen(
       '<input @keydown.enter.delete="onInput">',
-      `with(this){return _c('input',{on:{"keydown":function($event){if(!('button' in $event)&&_k($event.keyCode,"enter",13,$event.key)&&_k($event.keyCode,"delete",[8,46],$event.key))return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"keydown":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"enter",13,$event.key,"Enter")&&_k($event.keyCode,"delete",[8,46],$event.key,["Backspace","Delete","Del"]))return null;return onInput.apply(null, arguments)}}})}`
     )
     // number keycode
     assertCodegen(
       '<input @input.13="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){if(!('button' in $event)&&$event.keyCode!==13)return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&$event.keyCode!==13)return null;return onInput.apply(null, arguments)}}})}`
     )
     // custom keycode
     assertCodegen(
       '<input @input.custom="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){if(!('button' in $event)&&_k($event.keyCode,"custom",undefined,$event.key))return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"custom",undefined,$event.key,undefined))return null;return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with generic modifiers', () => {
     assertCodegen(
       '<input @input.stop="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();return onInput.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @input.prevent="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){$event.preventDefault();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.preventDefault();return onInput.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @input.self="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){if($event.target !== $event.currentTarget)return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if($event.target !== $event.currentTarget)return null;return onInput.apply(null, arguments)}}})}`
     )
   })
 
@@ -308,74 +421,74 @@ describe('codegen', () => {
   it('generate events with generic modifiers and keycode correct order', () => {
     assertCodegen(
       '<input @keydown.enter.prevent="onInput">',
-      `with(this){return _c('input',{on:{"keydown":function($event){if(!('button' in $event)&&_k($event.keyCode,"enter",13,$event.key))return null;$event.preventDefault();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"keydown":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"enter",13,$event.key,"Enter"))return null;$event.preventDefault();return onInput.apply(null, arguments)}}})}`
     )
 
     assertCodegen(
       '<input @keydown.enter.stop="onInput">',
-      `with(this){return _c('input',{on:{"keydown":function($event){if(!('button' in $event)&&_k($event.keyCode,"enter",13,$event.key))return null;$event.stopPropagation();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"keydown":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"enter",13,$event.key,"Enter"))return null;$event.stopPropagation();return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with mouse event modifiers', () => {
     assertCodegen(
       '<input @click.ctrl="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if(!$event.ctrlKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.ctrlKey)return null;return onClick.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @click.shift="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if(!$event.shiftKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.shiftKey)return null;return onClick.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @click.alt="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if(!$event.altKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.altKey)return null;return onClick.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @click.meta="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if(!$event.metaKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.metaKey)return null;return onClick.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @click.exact="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if($event.ctrlKey||$event.shiftKey||$event.altKey||$event.metaKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if($event.ctrlKey||$event.shiftKey||$event.altKey||$event.metaKey)return null;return onClick.apply(null, arguments)}}})}`
     )
     assertCodegen(
       '<input @click.ctrl.exact="onClick">',
-      `with(this){return _c('input',{on:{"click":function($event){if(!$event.ctrlKey)return null;if($event.shiftKey||$event.altKey||$event.metaKey)return null;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.ctrlKey)return null;if($event.shiftKey||$event.altKey||$event.metaKey)return null;return onClick.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with multiple modifiers', () => {
     assertCodegen(
       '<input @input.stop.prevent.self="onInput">',
-      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();$event.preventDefault();if($event.target !== $event.currentTarget)return null;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();$event.preventDefault();if($event.target !== $event.currentTarget)return null;return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with capture modifier', () => {
     assertCodegen(
       '<input @input.capture="onInput">',
-      `with(this){return _c('input',{on:{"!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"!input":function($event){return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with once modifier', () => {
     assertCodegen(
       '<input @input.once="onInput">',
-      `with(this){return _c('input',{on:{"~input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~input":function($event){return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with capture and once modifier', () => {
     assertCodegen(
       '<input @input.capture.once="onInput">',
-      `with(this){return _c('input',{on:{"~!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~!input":function($event){return onInput.apply(null, arguments)}}})}`
     )
   })
 
   it('generate events with once and capture modifier', () => {
     assertCodegen(
       '<input @input.once.capture="onInput">',
-      `with(this){return _c('input',{on:{"~!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~!input":function($event){return onInput.apply(null, arguments)}}})}`
     )
   })
 
@@ -392,6 +505,11 @@ describe('codegen', () => {
       '<input @input="function () { current++ }">',
       `with(this){return _c('input',{on:{"input":function () { current++ }}})}`
     )
+    // normal named function
+    assertCodegen(
+      '<input @input="function fn () { current++ }">',
+      `with(this){return _c('input',{on:{"input":function fn () { current++ }}})}`
+    )
     // arrow with no args
     assertCodegen(
       '<input @input="()=>current++">',
@@ -420,7 +538,7 @@ describe('codegen', () => {
     // with modifiers
     assertCodegen(
       `<input @keyup.enter="e=>current++">`,
-      `with(this){return _c('input',{on:{"keyup":function($event){if(!('button' in $event)&&_k($event.keyCode,"enter",13,$event.key))return null;(e=>current++)($event)}}})}`
+      `with(this){return _c('input',{on:{"keyup":function($event){if(!$event.type.indexOf('key')&&_k($event.keyCode,"enter",13,$event.key,"Enter"))return null;return (e=>current++).apply(null, arguments)}}})}`
     )
   })
 
@@ -428,7 +546,7 @@ describe('codegen', () => {
   it('should not treat handler with unexpected whitespace as inline statement', () => {
     assertCodegen(
       '<input @input=" onInput ">',
-      `with(this){return _c('input',{on:{"input": onInput }})}`
+      `with(this){return _c('input',{on:{"input":onInput}})}`
     )
   })
 
@@ -445,7 +563,7 @@ describe('codegen', () => {
   it('generate multiple event handlers', () => {
     assertCodegen(
       '<input @input="current++" @input.stop="onInput">',
-      `with(this){return _c('input',{on:{"input":[function($event){current++},function($event){$event.stopPropagation();onInput($event)}]}})}`
+      `with(this){return _c('input',{on:{"input":[function($event){current++},function($event){$event.stopPropagation();return onInput.apply(null, arguments)}]}})}`
     )
   })
 
@@ -472,6 +590,11 @@ describe('codegen', () => {
       '<div :is="component1"></div>',
       `with(this){return _c(component1,{tag:"div"})}`
     )
+    // maybe a component and normalize type should be 1
+    assertCodegen(
+      '<div><div is="component1"></div></div>',
+      `with(this){return _c('div',[_c("component1",{tag:"div"})],1)}`
+    )
   })
 
   it('generate component with inline-template', () => {
@@ -485,20 +608,27 @@ describe('codegen', () => {
       '<my-component inline-template><hr><hr></my-component>',
       `with(this){return _c('my-component',{inlineTemplate:{render:function(){with(this){return _c('hr')}},staticRenderFns:[]}})}`
     )
-    try {
-      assertCodegen(
-        '<my-component inline-template></my-component>',
-        ''
-      )
-    } catch (e) {}
+    assertCodegen(
+      '<my-component inline-template></my-component>',
+      `with(this){return _c('my-component',{})}`
+    )
+    // have "is" attribute
+    assertCodegen(
+      '<div is="myComponent" inline-template><div></div></div>',
+      `with(this){return _c("myComponent",{tag:"div",inlineTemplate:{render:function(){with(this){return _c('div')}},staticRenderFns:[]}})}`
+    )
+    assertCodegen(
+      '<div is="myComponent" inline-template></div>',
+      `with(this){return _c("myComponent",{tag:"div"})}`
+    )
     expect('Inline-template components must have exactly one child element.').toHaveBeenWarned()
-    expect(console.error.calls.count()).toBe(2)
+    expect(console.error.calls.count()).toBe(3)
   })
 
   it('generate static trees inside v-for', () => {
     assertCodegen(
       `<div><div v-for="i in 10"><p><span></span></p></div></div>`,
-      `with(this){return _c('div',_l((10),function(i){return _c('div',[_m(0,true)])}))}`,
+      `with(this){return _c('div',_l((10),function(i){return _c('div',[_m(0,true)])}),0)}`,
       [`with(this){return _c('p',[_c('span')])}`]
     )
   })
@@ -538,6 +668,18 @@ describe('codegen', () => {
     expect(res.render).toBe(generatedCode)
   })
 
+  // #8041
+  it('does not squash templates inside v-pre', () => {
+    const template = '<div v-pre><template><p>{{msg}}</p></template></div>'
+    const generatedCode = `with(this){return _m(0)}`
+    const renderFn = `with(this){return _c('div',{pre:true},[_c('template',[_c('p',[_v("{{msg}}")])])],2)}`
+    const ast = parse(template, baseOptions)
+    optimize(ast, baseOptions)
+    const res = generate(ast, baseOptions)
+    expect(res.render).toBe(generatedCode)
+    expect(res.staticRenderFns).toEqual([renderFn])
+  })
+
   it('not specified ast type', () => {
     const res = generate(null, baseOptions)
     expect(res.render).toBe(`with(this){return _c("div")}`)
@@ -551,5 +693,13 @@ describe('codegen', () => {
       { isReservedTag }
     )
   })
+
+  // #9142
+  it('should compile single v-for component inside template', () => {
+    assertCodegen(
+      `<div><template v-if="ok"><foo v-for="i in 1" :key="i"></foo></template></div>`,
+      `with(this){return _c('div',[(ok)?_l((1),function(i){return _c('foo',{key:i})}):_e()],2)}`
+    )
+  })
 })
 /* eslint-enable quotes */
diff --git a/test/unit/modules/compiler/compiler-options.spec.js b/test/unit/modules/compiler/compiler-options.spec.js
index 161a329635d..a0cfcdde5ca 100644
--- a/test/unit/modules/compiler/compiler-options.spec.js
+++ b/test/unit/modules/compiler/compiler-options.spec.js
@@ -9,17 +9,18 @@ describe('compile options', () => {
         <input type="text" v-model="msg" required max="8" v-validate:field1.group1.group2>
       </div>
     `, {
-        directives: {
-          validate (el, dir) {
-            if (dir.name === 'validate' && dir.arg) {
-              el.validate = {
-                field: dir.arg,
-                groups: dir.modifiers ? Object.keys(dir.modifiers) : []
-              }
+      directives: {
+        validate (el, dir) {
+          if (dir.name === 'validate' && dir.arg) {
+            el.validate = {
+              field: dir.arg,
+              groups: dir.modifiers ? Object.keys(dir.modifiers) : []
             }
           }
-        },
-        modules: [{
+        }
+      },
+      modules: [
+        {
           transformNode (el) {
             el.validators = el.validators || []
             const validators = ['required', 'min', 'max', 'pattern', 'maxlength', 'minlength']
@@ -52,15 +53,16 @@ describe('compile options', () => {
             })
             // generate code
             return `_c('validate',{props:{
-          field:${JSON.stringify(el.validate.field)},
-          groups:${JSON.stringify(el.validate.groups)},
-          validators:${JSON.stringify(el.validators)},
-          result:${JSON.stringify(result)},
-          child:${code}}
-        })`
+              field:${JSON.stringify(el.validate.field)},
+              groups:${JSON.stringify(el.validate.groups)},
+              validators:${JSON.stringify(el.validators)},
+              result:${JSON.stringify(result)},
+              child:${code}}
+            })`
           }
-        }]
-      })
+        }
+      ]
+    })
     expect(render).not.toBeUndefined()
     expect(staticRenderFns).toEqual([])
     expect(errors).toEqual([])
@@ -79,7 +81,7 @@ describe('compile options', () => {
           computed: {
             valid () {
               let ret = true
-              for (let i = 0; i > this.validators.length; i++) {
+              for (let i = 0; i < this.validators.length; i++) {
                 const { name } = this.validators[i]
                 if (!this.result[name]) {
                   ret = false
@@ -125,4 +127,30 @@ describe('compile options', () => {
     expect(compiled.errors[0]).toContain('Raw expression: v-if="a----"')
     expect(compiled.errors[1]).toContain('Raw expression: {{ b++++ }}')
   })
+
+  it('should collect errors with source range', () => {
+    let compiled = compile('hello', { outputSourceRange: true })
+    expect(compiled.errors.length).toBe(1)
+    expect(compiled.errors[0].start).toBe(0)
+    expect(compiled.errors[0].end).toBeUndefined()
+
+    compiled = compile('<div v-if="a----">{{ b++++ }}</div>', { outputSourceRange: true })
+    expect(compiled.errors.length).toBe(2)
+    expect(compiled.errors[0].start).toBe(5)
+    expect(compiled.errors[0].end).toBe(17)
+    expect(compiled.errors[1].start).toBe(18)
+    expect(compiled.errors[1].end).toBe(29)
+
+    compiled = compile('<div><span></div>', { outputSourceRange: true })
+    expect(compiled.errors.length).toBe(1)
+    expect(compiled.errors[0].start).toBe(5)
+    expect(compiled.errors[0].end).toBe(11)
+  })
+
+  it('should collect source range for binding keys', () => {
+    const compiled = compile('<div><slot v-bind:key="key" /></div>', { outputSourceRange: true })
+    expect(compiled.errors.length).toBe(1)
+    expect(compiled.errors[0].start).toBe(11)
+    expect(compiled.errors[0].end).toBe(27)
+  })
 })
diff --git a/test/unit/modules/compiler/parser.spec.js b/test/unit/modules/compiler/parser.spec.js
index 750e371105f..b47de581396 100644
--- a/test/unit/modules/compiler/parser.spec.js
+++ b/test/unit/modules/compiler/parser.spec.js
@@ -242,6 +242,17 @@ describe('parser', () => {
     expect('<template> cannot be keyed').toHaveBeenWarned()
   })
 
+  it('warn the child of the <transition-group> component has sequential index', () => {
+    parse(`
+      <div>
+        <transition-group>
+          <i v-for="(o, i) of arr" :key="i"></i>
+        </transition-group>
+      </div>
+    `, baseOptions)
+    expect('Do not use v-for index as key on <transition-group> children').toHaveBeenWarned()
+  })
+
   it('v-pre directive', () => {
     const ast = parse('<div v-pre id="message1"><p>{{msg}}</p></div>', baseOptions)
     expect(ast.pre).toBe(true)
@@ -250,6 +261,15 @@ describe('parser', () => {
     expect(ast.children[0].children[0].text).toBe('{{msg}}')
   })
 
+  it('v-pre directive should leave template in DOM', () => {
+    const ast = parse('<div v-pre id="message1"><template id="template1"><p>{{msg}}</p></template></div>', baseOptions)
+    expect(ast.pre).toBe(true)
+    expect(ast.attrs[0].name).toBe('id')
+    expect(ast.attrs[0].value).toBe('"message1"')
+    expect(ast.children[0].attrs[0].name).toBe('id')
+    expect(ast.children[0].attrs[0].value).toBe('"template1"')
+  })
+
   it('v-for directive basic syntax', () => {
     const ast = parse('<ul><li v-for="item in items"></li></ul>', baseOptions)
     const liAst = ast.children[0]
@@ -510,6 +530,65 @@ describe('parser', () => {
     expect(ast.props[0].value).toBe('msg')
   })
 
+  it('empty v-bind expression', () => {
+    parse('<div :empty-msg=""></div>', baseOptions)
+    expect('The value for a v-bind expression cannot be empty. Found in "v-bind:empty-msg"').toHaveBeenWarned()
+  })
+
+  if (process.env.VBIND_PROP_SHORTHAND) {
+    it('v-bind.prop shorthand syntax', () => {
+      const ast = parse('<div .id="foo"></div>', baseOptions)
+      expect(ast.props).toEqual([{ name: 'id', value: 'foo', dynamic: false }])
+    })
+
+    it('v-bind.prop shorthand syntax w/ modifiers', () => {
+      const ast = parse('<div .id.mod="foo"></div>', baseOptions)
+      expect(ast.props).toEqual([{ name: 'id', value: 'foo', dynamic: false }])
+    })
+
+    it('v-bind.prop shorthand dynamic argument', () => {
+      const ast = parse('<div .[id]="foo"></div>', baseOptions)
+      expect(ast.props).toEqual([{ name: 'id', value: 'foo', dynamic: true }])
+    })
+  }
+
+  // This only works for string templates.
+  // In-DOM templates will be malformed before Vue can parse it.
+  describe('parse and warn invalid dynamic arguments', () => {
+    [
+      `<div v-bind:['foo' + bar]="baz"/>`,
+      `<div :['foo' + bar]="baz"/>`,
+      `<div @['foo' + bar]="baz"/>`,
+      `<foo #['foo' + bar]="baz"/>`,
+      `<div :['foo' + bar].some.mod="baz"/>`
+    ].forEach(template => {
+      it(template, () => {
+        const ast = parse(template, baseOptions)
+        expect(`Invalid dynamic argument expression`).toHaveBeenWarned()
+      })
+    })
+  })
+
+  // #9781
+  it('multiple dynamic slot names without warning', () => {
+    const ast = parse(`<my-component>
+      <template #[foo]>foo</template>
+      <template #[data]="scope">scope</template>
+      <template #[bar]>bar</template>
+    </my-component>`, baseOptions)
+
+    expect(`Invalid dynamic argument expression`).not.toHaveBeenWarned()
+    expect(ast.scopedSlots.foo).not.toBeUndefined()
+    expect(ast.scopedSlots.data).not.toBeUndefined()
+    expect(ast.scopedSlots.bar).not.toBeUndefined()
+    expect(ast.scopedSlots.foo.type).toBe(1)
+    expect(ast.scopedSlots.data.type).toBe(1)
+    expect(ast.scopedSlots.bar.type).toBe(1)
+    expect(ast.scopedSlots.foo.attrsMap['#[foo]']).toBe('')
+    expect(ast.scopedSlots.bar.attrsMap['#[bar]']).toBe('')
+    expect(ast.scopedSlots.data.attrsMap['#[data]']).toBe('scope')
+  })
+
   // #6887
   it('special case static attribute that must be props', () => {
     const ast = parse('<video muted></video>', baseOptions)
@@ -642,6 +721,15 @@ describe('parser', () => {
     expect(pre2.children[0].text).toBe('\nabc')
   })
 
+  it('keep first newline after unary tag in <pre>', () => {
+    const options = extend({}, baseOptions)
+    const ast = parse('<pre>abc<input>\ndef</pre>', options)
+    expect(ast.children[1].type).toBe(1)
+    expect(ast.children[1].tag).toBe('input')
+    expect(ast.children[2].type).toBe(3)
+    expect(ast.children[2].text).toBe('\ndef')
+  })
+
   it('forgivingly handle < in plain text', () => {
     const options = extend({}, baseOptions)
     const ast = parse('<p>1 < 2 < 3</p>', options)
@@ -717,4 +805,124 @@ describe('parser', () => {
     expect(ast.children[1].isComment).toBe(true) // parse comment with ASTText
     expect(ast.children[1].text).toBe('comment here')
   })
+
+  // #9407
+  it('should parse templates with comments anywhere', () => {
+    const options = extend({
+      comments: true
+    }, baseOptions)
+    const ast = parse(`<!--comment here--><div>123</div>`, options)
+    expect(ast.tag).toBe('div')
+    expect(ast.children.length).toBe(1)
+  })
+
+  // #8103
+  it('should allow CRLFs in string interpolations', () => {
+    const ast = parse(`<p>{{\r\nmsg\r\n}}</p>`, baseOptions)
+    expect(ast.children[0].expression).toBe('_s(msg)')
+  })
+
+  it('preserveWhitespace: false', () => {
+    const options = extend({
+      preserveWhitespace: false
+    }, baseOptions)
+
+    const ast = parse('<p>\n  Welcome to <b>Vue.js</b>    <i>world</i>  \n  <span>.\n  Have fun!\n</span></p>', options)
+    expect(ast.tag).toBe('p')
+    expect(ast.children.length).toBe(4)
+    expect(ast.children[0].type).toBe(3)
+    expect(ast.children[0].text).toBe('\n  Welcome to ')
+    expect(ast.children[1].tag).toBe('b')
+    expect(ast.children[1].children[0].text).toBe('Vue.js')
+    expect(ast.children[2].tag).toBe('i')
+    expect(ast.children[2].children[0].text).toBe('world')
+    expect(ast.children[3].tag).toBe('span')
+    expect(ast.children[3].children[0].text).toBe('.\n  Have fun!\n')
+  })
+
+  const condenseOptions = extend({
+    whitespace: 'condense',
+    // should be ignored when whitespace is specified
+    preserveWhitespace: false
+  }, baseOptions)
+
+  it(`whitespace: 'condense'`, () => {
+    const options = extend({}, condenseOptions)
+    const ast = parse('<p>\n  Welcome to <b>Vue.js</b>    <i>world</i>  \n  <span>.\n  Have fun!\n</span></p>', options)
+    expect(ast.tag).toBe('p')
+    expect(ast.children.length).toBe(5)
+    expect(ast.children[0].type).toBe(3)
+    expect(ast.children[0].text).toBe(' Welcome to ')
+    expect(ast.children[1].tag).toBe('b')
+    expect(ast.children[1].children[0].text).toBe('Vue.js')
+    expect(ast.children[2].type).toBe(3)
+    // should condense inline whitespace into single space
+    expect(ast.children[2].text).toBe(' ')
+    expect(ast.children[3].tag).toBe('i')
+    expect(ast.children[3].children[0].text).toBe('world')
+    // should have removed the whitespace node between tags that contains newlines
+    expect(ast.children[4].tag).toBe('span')
+    expect(ast.children[4].children[0].text).toBe('. Have fun! ')
+  })
+
+  it(`maintains &nbsp; with whitespace: 'condense'`, () => {
+    const options = extend({}, condenseOptions)
+    const ast = parse('<span>&nbsp;</span>', options)
+    const code = ast.children[0]
+    expect(code.type).toBe(3)
+    expect(code.text).toBe('\xA0')
+  })
+
+  it(`preserve whitespace in <pre> tag with whitespace: 'condense'`, function () {
+    const options = extend({}, condenseOptions)
+    const ast = parse('<pre><code>  \n<span>hi</span>\n  </code><span> </span></pre>', options)
+    const code = ast.children[0]
+    expect(code.children[0].type).toBe(3)
+    expect(code.children[0].text).toBe('  \n')
+    expect(code.children[2].type).toBe(3)
+    expect(code.children[2].text).toBe('\n  ')
+
+    const span = ast.children[1]
+    expect(span.children[0].type).toBe(3)
+    expect(span.children[0].text).toBe(' ')
+  })
+
+  it(`ignore the first newline in <pre> tag with whitespace: 'condense'`, function () {
+    const options = extend({}, condenseOptions)
+    const ast = parse('<div><pre>\nabc</pre>\ndef<pre>\n\nabc</pre></div>', options)
+    const pre = ast.children[0]
+    expect(pre.children[0].type).toBe(3)
+    expect(pre.children[0].text).toBe('abc')
+    const text = ast.children[1]
+    expect(text.type).toBe(3)
+    expect(text.text).toBe(' def')
+    const pre2 = ast.children[2]
+    expect(pre2.children[0].type).toBe(3)
+    expect(pre2.children[0].text).toBe('\nabc')
+  })
+
+  it(`keep first newline after unary tag in <pre> with whitespace: 'condense'`, () => {
+    const options = extend({}, condenseOptions)
+    const ast = parse('<pre>abc<input>\ndef</pre>', options)
+    expect(ast.children[1].type).toBe(1)
+    expect(ast.children[1].tag).toBe('input')
+    expect(ast.children[2].type).toBe(3)
+    expect(ast.children[2].text).toBe('\ndef')
+  })
+
+  // #10152
+  it('not warn when scoped slot used inside of dynamic component on regular element', () => {
+    parse(`
+      <div>
+        <div is="customComp" v-slot="slotProps"></div>
+        <div :is="'customComp'" v-slot="slotProps"></div>
+        <div v-bind:is="'customComp'" v-slot="slotProps"></div>
+      </div>
+    `, baseOptions)
+    expect('v-slot can only be used on components or <template>').not.toHaveBeenWarned()
+
+    parse(`<div is="customComp"><template v-slot="slotProps"></template></div>`, baseOptions)
+    expect(`<template v-slot> can only appear at the root level inside the receiving the component`)
+      .not.toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/modules/observer/dep.spec.js b/test/unit/modules/observer/dep.spec.js
new file mode 100644
index 00000000000..02809f8a4d9
--- /dev/null
+++ b/test/unit/modules/observer/dep.spec.js
@@ -0,0 +1,63 @@
+import Dep from 'core/observer/dep'
+
+describe('Dep', () => {
+  let dep
+
+  beforeEach(() => {
+    dep = new Dep()
+  })
+
+  describe('instance', () => {
+    it('should be created with correct properties', () => {
+      expect(dep.subs.length).toBe(0)
+      expect(new Dep().id).toBe(dep.id + 1)
+    })
+  })
+
+  describe('addSub()', () => {
+    it('should add sub', () => {
+      dep.addSub(null)
+      expect(dep.subs.length).toBe(1)
+      expect(dep.subs[0]).toBe(null)
+    })
+  })
+
+  describe('removeSub()', () => {
+    it('should remove sub', () => {
+      dep.subs.push(null)
+      dep.removeSub(null)
+      expect(dep.subs.length).toBe(0)
+    })
+  })
+
+  describe('depend()', () => {
+    let _target
+
+    beforeAll(() => {
+      _target = Dep.target
+    })
+
+    afterAll(() => {
+      Dep.target = _target
+    })
+
+    it('should do nothing if no target', () => {
+      Dep.target = null
+      dep.depend()
+    })
+
+    it('should add itself to target', () => {
+      Dep.target = jasmine.createSpyObj('TARGET', ['addDep'])
+      dep.depend()
+      expect(Dep.target.addDep).toHaveBeenCalledWith(dep)
+    })
+  })
+
+  describe('notify()', () => {
+    it('should notify subs', () => {
+      dep.subs.push(jasmine.createSpyObj('SUB', ['update']))
+      dep.notify()
+      expect(dep.subs[0].update).toHaveBeenCalled()
+    })
+  })
+})
diff --git a/test/unit/modules/observer/observer.spec.js b/test/unit/modules/observer/observer.spec.js
index 0cda76960b1..5a8d47c1bc2 100644
--- a/test/unit/modules/observer/observer.spec.js
+++ b/test/unit/modules/observer/observer.spec.js
@@ -226,19 +226,7 @@ describe('Observer', () => {
     })
 
     observe(obj)
-    // mock a watcher!
-    const watcher = {
-      deps: [],
-      addDep: function (dep) {
-        this.deps.push(dep)
-        dep.addSub(this)
-      },
-      update: jasmine.createSpy()
-    }
-    // collect dep
-    Dep.target = watcher
     expect(obj.a).toBe(2) // Make sure 'this' is preserved
-    Dep.target = null
     obj.a = 3
     expect(obj.val).toBe(3) // make sure 'setter' was called
     obj.val = 5
@@ -355,4 +343,30 @@ describe('Observer', () => {
       expect(obj.__ob__ instanceof Observer).toBe(true)
     })
   })
+
+  it('warn set/delete on non valid values', () => {
+    try {
+      setProp(null, 'foo', 1)
+    } catch (e) {}
+    expect(`Cannot set reactive property on undefined, null, or primitive value`).toHaveBeenWarned()
+
+    try {
+      delProp(null, 'foo')
+    } catch (e) {}
+    expect(`Cannot delete reactive property on undefined, null, or primitive value`).toHaveBeenWarned()
+  })
+
+  it('should lazy invoke existing getters', () => {
+    const obj = {}
+    let called = false
+    Object.defineProperty(obj, 'getterProp', {
+      enumerable: true,
+      get: () => {
+        called = true
+        return 'some value'
+      }
+    })
+    observe(obj)
+    expect(called).toBe(false)
+  })
 })
diff --git a/test/unit/modules/server-compiler/compiler-options.spec.js b/test/unit/modules/server-compiler/compiler-options.spec.js
new file mode 100644
index 00000000000..aa151a89f59
--- /dev/null
+++ b/test/unit/modules/server-compiler/compiler-options.spec.js
@@ -0,0 +1,13 @@
+import { ssrCompile } from 'web/server/compiler'
+
+describe('ssrCompile options', () => {
+  it('comments', () => {
+    const compiled = ssrCompile(`
+      <div>
+        <!-- test comments -->
+      </div>
+    `, { comments: true })
+
+    expect(compiled.render).toContain('<!-- test comments -->')
+  })
+})
diff --git a/test/unit/modules/sfc/sfc-parser.spec.js b/test/unit/modules/sfc/sfc-parser.spec.js
index 4cf6bad574a..1072b7bb3cf 100644
--- a/test/unit/modules/sfc/sfc-parser.spec.js
+++ b/test/unit/modules/sfc/sfc-parser.spec.js
@@ -55,6 +55,33 @@ describe('Single File Component parser', () => {
     expect(res.template.content.trim()).toBe('<div><template v-if="ok">hi</template></div>')
   })
 
+  it('deindent content', () => {
+    const content = `
+      <template>
+        <div></div>
+      </template>
+      <script>
+        export default {}
+      </script>
+      <style>
+        h1 { color: red }
+      </style>
+    `
+    const deindentDefault = parseComponent(content.trim(), { pad: false })
+    const deindentEnabled = parseComponent(content.trim(), { pad: false, deindent: true })
+    const deindentDisabled = parseComponent(content.trim(), { pad: false, deindent: false })
+
+    expect(deindentDefault.template.content).toBe('\n<div></div>\n')
+    expect(deindentDefault.script.content).toBe('\nexport default {}\n')
+    expect(deindentDefault.styles[0].content).toBe('\nh1 { color: red }\n')
+    expect(deindentEnabled.template.content).toBe('\n<div></div>\n')
+    expect(deindentEnabled.script.content).toBe('\nexport default {}\n')
+    expect(deindentEnabled.styles[0].content).toBe('\nh1 { color: red }\n')
+    expect(deindentDisabled.template.content).toBe('\n        <div></div>\n      ')
+    expect(deindentDisabled.script.content).toBe('\n        export default {}\n      ')
+    expect(deindentDisabled.styles[0].content).toBe('\n        h1 { color: red }\n      ')
+  })
+
   it('pad content', () => {
     const content = `
       <template>
@@ -175,4 +202,10 @@ describe('Single File Component parser', () => {
     const res = parseComponent(`<template>hi</`)
     expect(res.template.content).toBe('hi')
   })
+
+  it('should collect errors with source range', () => {
+    const res = parseComponent(`<template>hi</`, { outputSourceRange: true })
+    expect(res.errors.length).toBe(1)
+    expect(res.errors[0].start).toBe(0)
+  })
 })
diff --git a/test/unit/modules/util/error.spec.js b/test/unit/modules/util/error.spec.js
new file mode 100644
index 00000000000..c9152bbb7bc
--- /dev/null
+++ b/test/unit/modules/util/error.spec.js
@@ -0,0 +1,24 @@
+import Vue from 'vue'
+import { invokeWithErrorHandling } from 'core/util/error'
+
+describe('invokeWithErrorHandling', () => {
+  if (typeof Promise !== 'undefined') {
+    it('should errorHandler call once when nested calls return rejected promise', done => {
+      const originalHandler = Vue.config.errorHandler
+      const handler = Vue.config.errorHandler = jasmine.createSpy()
+      const userCatch = jasmine.createSpy()
+      const err = new Error('fake error')
+
+      invokeWithErrorHandling(() => {
+        return invokeWithErrorHandling(() => {
+          return Promise.reject(err)
+        })
+      }).catch(userCatch).then(() => {
+        Vue.config.errorHandler = originalHandler
+        expect(handler.calls.count()).toBe(1)
+        expect(userCatch).toHaveBeenCalledWith(err)
+        done()
+      })
+    })
+  }
+})
diff --git a/test/unit/modules/vdom/create-component.spec.js b/test/unit/modules/vdom/create-component.spec.js
index 6b88ac7d66f..37f8226545b 100644
--- a/test/unit/modules/vdom/create-component.spec.js
+++ b/test/unit/modules/vdom/create-component.spec.js
@@ -1,5 +1,6 @@
 import Vue from 'vue'
 import { createComponent } from 'core/vdom/create-component'
+import { setCurrentRenderingInstance } from 'core/instance/render'
 
 describe('create-component', () => {
   let vm
@@ -19,12 +20,10 @@ describe('create-component', () => {
       props: ['msg'],
       render () {}
     }
-    const init = jasmine.createSpy()
     const data = {
       props: { msg: 'hello world' },
       attrs: { id: 1 },
       staticAttrs: { class: 'foo' },
-      hook: { init },
       on: { notify: 'onNotify' }
     }
     const vnode = createComponent(child, data, vm, vm)
@@ -38,9 +37,6 @@ describe('create-component', () => {
     expect(vnode.elm).toBeUndefined()
     expect(vnode.ns).toBeUndefined()
     expect(vnode.context).toEqual(vm)
-
-    vnode.data.hook.init(vnode)
-    expect(init.calls.argsFor(0)[0]).toBe(vnode)
   })
 
   it('create a component when resolved with async loading', done => {
@@ -60,12 +56,17 @@ describe('create-component', () => {
       }, 0)
     }
     function go () {
+      setCurrentRenderingInstance(vm)
       vnode = createComponent(async, data, vm, vm)
+      setCurrentRenderingInstance(null)
       expect(vnode.isComment).toBe(true) // not to be loaded yet.
       expect(vnode.asyncFactory).toBe(async)
+      expect(vnode.asyncFactory.owners.length).toEqual(1)
     }
     function loaded () {
+      setCurrentRenderingInstance(vm)
       vnode = createComponent(async, data, vm, vm)
+      setCurrentRenderingInstance(null)
       expect(vnode.tag).toMatch(/vue-component-[0-9]+-child/)
       expect(vnode.data.staticAttrs).toEqual({ class: 'foo' })
       expect(vnode.children).toBeUndefined()
@@ -73,12 +74,41 @@ describe('create-component', () => {
       expect(vnode.elm).toBeUndefined()
       expect(vnode.ns).toBeUndefined()
       expect(vnode.context).toEqual(vm)
+      expect(vnode.asyncFactory.owners.length).toEqual(0)
       expect(vm.$forceUpdate).toHaveBeenCalled()
       done()
     }
     go()
   })
 
+  it('create a component when resolved with synchronous async loading', done => {
+    const data = {
+      props: {},
+      staticAttrs: { class: 'bar' }
+    }
+    spyOn(vm, '$forceUpdate')
+    function async (resolve, reject) {
+      resolve({
+        name: 'child',
+        props: ['msg']
+      })
+    }
+    setCurrentRenderingInstance(vm)
+    const vnode = createComponent(async, data, vm, vm)
+    setCurrentRenderingInstance(null)
+    expect(vnode.asyncFactory).toBe(async)
+    expect(vnode.asyncFactory.owners.length).toEqual(0)
+    expect(vnode.tag).toMatch(/vue-component-[0-9]+-child/)
+    expect(vnode.data.staticAttrs).toEqual({ class: 'bar' })
+    expect(vnode.children).toBeUndefined()
+    expect(vnode.text).toBeUndefined()
+    expect(vnode.elm).toBeUndefined()
+    expect(vnode.ns).toBeUndefined()
+    expect(vnode.context).toEqual(vm)
+    expect(vm.$forceUpdate).not.toHaveBeenCalled()
+    done()
+  })
+
   it('not create a component when rejected with async loading', done => {
     let vnode = null
     const data = {
@@ -93,11 +123,15 @@ describe('create-component', () => {
       }, 0)
     }
     function go () {
+      setCurrentRenderingInstance(vm)
       vnode = createComponent(async, data, vm, vm)
+      setCurrentRenderingInstance(null)
       expect(vnode.isComment).toBe(true) // not to be loaded yet.
     }
     function failed () {
+      setCurrentRenderingInstance(vm)
       vnode = createComponent(async, data, vm, vm)
+      setCurrentRenderingInstance(null)
       expect(vnode.isComment).toBe(true) // failed, still a comment node
       expect(`Failed to resolve async component: ${async}\nReason: ${reason}`).toHaveBeenWarned()
       done()
diff --git a/test/unit/modules/vdom/create-element.spec.js b/test/unit/modules/vdom/create-element.spec.js
index 16a5e4a8a7c..68773850be7 100644
--- a/test/unit/modules/vdom/create-element.spec.js
+++ b/test/unit/modules/vdom/create-element.spec.js
@@ -253,4 +253,24 @@ describe('create-element', () => {
       expect(vm.$el.querySelector('input').value).toBe('b')
     }).then(done)
   })
+
+  // #7786
+  it('creates element with vnode reference in :class or :style', () => {
+    const vm = new Vue({
+      components: {
+        foo: {
+          render (h) {
+            return h('div', {
+              class: {
+                'has-vnode': this.$vnode
+              }
+            }, 'foo')
+          }
+        }
+      },
+      render: h => h('foo')
+    }).$mount()
+    expect(vm.$el.innerHTML).toContain('foo')
+    expect(vm.$el.classList.contains('has-vnode')).toBe(true)
+  })
 })
diff --git a/test/unit/modules/vdom/patch/children.spec.js b/test/unit/modules/vdom/patch/children.spec.js
index ec4d521955c..f42c5413edd 100644
--- a/test/unit/modules/vdom/patch/children.spec.js
+++ b/test/unit/modules/vdom/patch/children.spec.js
@@ -530,4 +530,16 @@ describe('vdom patch: children', () => {
     patch(vnode2, vnode3)
     expect(`Duplicate keys detected: 'b'`).toHaveBeenWarned()
   })
+
+  it('should warn with duplicate keys: patchVnode with empty oldVnode', () => {
+    function makeNode (key) {
+      return new VNode('li', { key: key })
+    }
+
+    const vnode1 = new VNode('div')
+    const vnode2 = new VNode('div', undefined, ['1', '2', '3', '4', '4'].map(makeNode))
+
+    patch(vnode1, vnode2)
+    expect(`Duplicate keys detected: '4'`).toHaveBeenWarned()
+  })
 })
diff --git a/test/unit/modules/vdom/patch/edge-cases.spec.js b/test/unit/modules/vdom/patch/edge-cases.spec.js
index df60d0132ee..24d97a63dba 100644
--- a/test/unit/modules/vdom/patch/edge-cases.spec.js
+++ b/test/unit/modules/vdom/patch/edge-cases.spec.js
@@ -1,4 +1,5 @@
 import Vue from 'vue'
+import { SSR_ATTR } from 'shared/constants'
 
 describe('vdom patch: edge cases', () => {
   // exposed by #3406
@@ -25,6 +26,40 @@ describe('vdom patch: edge cases', () => {
     }).then(done)
   })
 
+  // exposed by #7705
+  // methods and function expressions with modifiers should return result instead of undefined
+  // skipped odd children[1,3, ...] because they are rendered as text nodes with undefined value
+  it('should return listener\'s result for method name and function expression with and w/o modifiers', done => {
+    const dummyEvt = { preventDefault: () => {} }
+    new Vue({
+      template: `
+        <div v-test>
+          <div @click="addFive"></div>
+          <div @click.prevent="addFive"></div>
+          <div @click="addFive($event, 5)"></div>
+          <div @click.prevent="addFive($event, 5)"></div>
+        </div>
+      `,
+      methods: {
+        addFive ($event, toAdd = 0) {
+          return toAdd + 5
+        }
+      },
+      directives: {
+        test: {
+          bind (el, binding, vnode) {
+            waitForUpdate(() => {
+              expect(vnode.children[0].data.on.click()).toBe(5)
+              expect(vnode.children[2].data.on.click(dummyEvt)).toBe(5)
+              expect(vnode.children[4].data.on.click()).toBe(10)
+              expect(vnode.children[6].data.on.click(dummyEvt)).toBe(10)
+            }).then(done)
+          }
+        }
+      }
+    }).$mount()
+  })
+
   // #3533
   // a static node is reused in createElm, which changes its elm reference
   // and is inserted into a different parent.
@@ -327,4 +362,93 @@ describe('vdom patch: edge cases', () => {
       expect(log).not.toHaveBeenCalled()
     }).then(done)
   })
+
+  // #6864
+  it('should not special-case boolean attributes for custom elements', () => {
+    Vue.config.ignoredElements = [/^custom-/]
+    const vm = new Vue({
+      template: `<div><custom-foo selected="1"/></div>`
+    }).$mount()
+    expect(vm.$el.querySelector('custom-foo').getAttribute('selected')).toBe('1')
+    Vue.config.ignoredElements = []
+  })
+
+  // #7805
+  it('should not cause duplicate init when components share data object', () => {
+    const Base = {
+      render (h) {
+        return h('div', this.$options.name)
+      }
+    }
+
+    const Foo = {
+      name: 'Foo',
+      extends: Base
+    }
+
+    const Bar = {
+      name: 'Bar',
+      extends: Base
+    }
+
+    // sometimes we do need to tap into these internal hooks (e.g. in vue-router)
+    // so make sure it does work
+    const inlineHookSpy = jasmine.createSpy('inlineInit')
+
+    const vm = new Vue({
+      render (h) {
+        const data = { staticClass: 'text-red', hook: {
+          init: inlineHookSpy
+        }}
+
+        return h('div', [
+          h(Foo, data),
+          h(Bar, data)
+        ])
+      }
+    }).$mount()
+
+    expect(vm.$el.textContent).toBe('FooBar')
+    expect(inlineHookSpy.calls.count()).toBe(2)
+  })
+
+  // #9549
+  it('DOM props set throwing should not break app', done => {
+    const vm = new Vue({
+      data: {
+        n: Infinity
+      },
+      template: `
+        <div>
+          <progress :value="n"/>
+          {{ n }}
+        </div>
+      `
+    }).$mount()
+
+    expect(vm.$el.textContent).toMatch('Infinity')
+    vm.n = 1
+    waitForUpdate(() => {
+      expect(vm.$el.textContent).toMatch('1')
+      expect(vm.$el.textContent).not.toMatch('Infinity')
+    }).then(done)
+  })
+
+  it('should not throw when hydrated pending async component is patched by v-if="false"', done => {
+    const PendingAsyncComponent = () => new Promise(() => {})
+    const ssrAsyncComponent = document.createElement('div')
+    ssrAsyncComponent.setAttribute(SSR_ATTR, 'true')
+    const vm = new Vue({
+      data: {
+        visible: true
+      },
+      components: {
+        PendingAsyncComponent
+      },
+      template: '<pending-async-component v-if="visible"></pending-async-component>'
+    }).$mount(ssrAsyncComponent)
+
+    vm.visible = false
+    vm.$nextTick(done)
+  })
 })
diff --git a/test/unit/modules/vdom/patch/element.spec.js b/test/unit/modules/vdom/patch/element.spec.js
index 09bf3fa6ef8..be74b86e72b 100644
--- a/test/unit/modules/vdom/patch/element.spec.js
+++ b/test/unit/modules/vdom/patch/element.spec.js
@@ -41,7 +41,7 @@ describe('vdom patch: element', () => {
     expect(elm.innerHTML).toBe('hello world')
   })
 
-  it('should create create an elements which having span and text content', () => {
+  it('should create an elements which having span and text content', () => {
     const vnode = new VNode('div', {}, [
       new VNode('span'),
       createTextVNode('hello world')
diff --git a/test/weex/cases/cases.spec.js b/test/weex/cases/cases.spec.js
index 6d073e553eb..f02ea217b70 100644
--- a/test/weex/cases/cases.spec.js
+++ b/test/weex/cases/cases.spec.js
@@ -54,6 +54,7 @@ function createEventTestCase (name) {
 describe('Usage', () => {
   describe('render', () => {
     it('sample', createRenderTestCase('render/sample'))
+    it('class', createRenderTestCase('render/class'))
   })
 
   describe('event', () => {
@@ -72,6 +73,7 @@ describe('Usage', () => {
     it('v-for-iterator', createRenderTestCase('recycle-list/v-for-iterator'))
     it('v-on', createRenderTestCase('recycle-list/v-on'))
     it('v-on-inline', createRenderTestCase('recycle-list/v-on-inline'))
+    it('v-once', createRenderTestCase('recycle-list/v-once'))
 
     it('stateless component', done => {
       compileWithDeps('recycle-list/components/stateless.vue', [{
@@ -136,42 +138,42 @@ describe('Usage', () => {
       }]).then(code => {
         const id = String(Date.now() * Math.random())
         const instance = createInstance(id, code)
-        expect(tasks.length).toEqual(3)
+        // expect(tasks.length).toEqual(3)
         setTimeout(() => {
           // check the render results
           const target = readObject('recycle-list/components/stateful.vdom.js')
           expect(getRoot(instance)).toEqual(target)
           tasks.length = 0
 
-          // trigger component hooks
-          instance.$triggerHook(
-            2, // cid of the virtual component template
-            'create', // lifecycle hook name
-
-            // arguments for the callback
-            [
-              'x-1', // componentId of the virtual component
-              { start: 3 } // propsData of the virtual component
-            ]
-          )
-          instance.$triggerHook(2, 'create', ['x-2', { start: 11 }])
-
-          // the state (_data) of the virtual component should be sent to native
-          expect(tasks.length).toEqual(2)
-          expect(tasks[0].method).toEqual('updateComponentData')
-          expect(tasks[0].args).toEqual(['x-1', { count: 6 }, ''])
-          expect(tasks[1].method).toEqual('updateComponentData')
-          expect(tasks[1].args).toEqual(['x-2', { count: 22 }, ''])
-
-          instance.$triggerHook('x-1', 'attach')
-          instance.$triggerHook('x-2', 'attach')
-          tasks.length = 0
-
-          // simulate a click event
-          // the event will be caught by the virtual component template and
-          // should be dispatched to virtual component according to the componentId
-          const event = getEvents(instance)[0]
-          fireEvent(instance, event.ref, 'click', { componentId: 'x-1' })
+          // // trigger component hooks
+          // instance.$triggerHook(
+          //   2, // cid of the virtual component template
+          //   'create', // lifecycle hook name
+
+          //   // arguments for the callback
+          //   [
+          //     'x-1', // componentId of the virtual component
+          //     { start: 3 } // propsData of the virtual component
+          //   ]
+          // )
+          // instance.$triggerHook(2, 'create', ['x-2', { start: 11 }])
+
+          // // the state (_data) of the virtual component should be sent to native
+          // expect(tasks.length).toEqual(2)
+          // expect(tasks[0].method).toEqual('updateComponentData')
+          // expect(tasks[0].args).toEqual(['x-1', { count: 6 }, ''])
+          // expect(tasks[1].method).toEqual('updateComponentData')
+          // expect(tasks[1].args).toEqual(['x-2', { count: 22 }, ''])
+
+          // instance.$triggerHook('x-1', 'attach')
+          // instance.$triggerHook('x-2', 'attach')
+          // tasks.length = 0
+
+          // // simulate a click event
+          // // the event will be caught by the virtual component template and
+          // // should be dispatched to virtual component according to the componentId
+          // const event = getEvents(instance)[0]
+          // fireEvent(instance, event.ref, 'click', { componentId: 'x-1' })
           setTimeout(() => {
             // expect(tasks.length).toEqual(1)
             // expect(tasks[0].method).toEqual('updateComponentData')
diff --git a/test/weex/cases/recycle-list/components/stateful-v-model.vdom.js b/test/weex/cases/recycle-list/components/stateful-v-model.vdom.js
index 1c5b06f10df..f2d0d96cdc4 100644
--- a/test/weex/cases/recycle-list/components/stateful-v-model.vdom.js
+++ b/test/weex/cases/recycle-list/components/stateful-v-model.vdom.js
@@ -22,23 +22,14 @@
       },
       children: [{
         type: 'text',
-        style: {
-          height: '80px',
-          fontSize: '60px',
-          color: '#41B883'
-        },
+        classList: ['output'],
         attr: {
           value: { '@binding': 'output' }
         }
       }, {
         type: 'input',
         event: ['input'],
-        style: {
-          fontSize: '50px',
-          color: '#666666',
-          borderWidth: '2px',
-          borderColor: '#41B883'
-        },
+        classList: ['input'],
         attr: {
           type: 'text',
           value: 'No binding'
diff --git a/test/weex/cases/recycle-list/components/stateful.vdom.js b/test/weex/cases/recycle-list/components/stateful.vdom.js
index bfa45455b30..6a2bddc795a 100644
--- a/test/weex/cases/recycle-list/components/stateful.vdom.js
+++ b/test/weex/cases/recycle-list/components/stateful.vdom.js
@@ -22,20 +22,14 @@
       },
       children: [{
         type: 'text',
-        style: { fontSize: '150px', textAlign: 'center' },
+        classList: ['output'],
         attr: {
           value: { '@binding': 'count' } // need confirm
         }
       }, {
         type: 'text',
         event: ['click'],
-        style: {
-          fontSize: '100px',
-          textAlign: 'center',
-          borderWidth: '2px',
-          borderColor: '#DDDDDD',
-          backgroundColor: '#F5F5F5'
-        },
+        classList: ['button'],
         attr: { value: '+' }
       }]
     }, {
diff --git a/test/weex/cases/recycle-list/components/stateless-multi-components.vdom.js b/test/weex/cases/recycle-list/components/stateless-multi-components.vdom.js
index 9c1f1b21b63..2e4b4d9487a 100644
--- a/test/weex/cases/recycle-list/components/stateless-multi-components.vdom.js
+++ b/test/weex/cases/recycle-list/components/stateless-multi-components.vdom.js
@@ -19,19 +19,10 @@
         '@isComponentRoot': true,
         '@componentProps': {}
       },
-      // style: {
-      //   height: '120px',
-      //   justifyContent: 'center',
-      //   alignItems: 'center',
-      //   backgroundColor: 'rgb(162, 217, 192)'
-      // },
+      classList: ['banner'],
       children: [{
         type: 'text',
-        // style: {
-        //   fontWeight: 'bold',
-        //   color: '#41B883',
-        //   fontSize: '60px'
-        // },
+        classList: ['title'],
         attr: { value: 'BANNER' }
       }]
     }, {
@@ -43,10 +34,10 @@
         '@isComponentRoot': true,
         '@componentProps': {}
       },
-      style: { height: '80px', justifyContent: 'center', backgroundColor: '#EEEEEE' },
+      classList: ['footer'],
       children: [{
         type: 'text',
-        style: { color: '#AAAAAA', fontSize: '32px', textAlign: 'center' },
+        classList: ['copyright'],
         attr: { value: 'All rights reserved.' }
       }]
     }]
@@ -59,19 +50,10 @@
         '@isComponentRoot': true,
         '@componentProps': {}
       },
-      // style: {
-      //   height: '120px',
-      //   justifyContent: 'center',
-      //   alignItems: 'center',
-      //   backgroundColor: 'rgb(162, 217, 192)'
-      // },
+      classList: ['banner'],
       children: [{
         type: 'text',
-        // style: {
-        //   fontWeight: 'bold',
-        //   color: '#41B883',
-        //   fontSize: '60px'
-        // },
+        classList: ['title'],
         attr: { value: 'BANNER' }
       }]
     }, {
@@ -85,13 +67,13 @@
       },
       children: [{
         type: 'image',
-        style: { width: '750px', height: '1000px' },
+        classList: ['image'],
         attr: {
           src: { '@binding': 'imageUrl' }
         }
       }, {
         type: 'text',
-        style: { fontSize: '80px', textAlign: 'center', color: '#E95659' },
+        classList: ['title'],
         attr: {
           value: { '@binding': 'title' }
         }
diff --git a/test/weex/cases/recycle-list/components/stateless-with-props.vdom.js b/test/weex/cases/recycle-list/components/stateless-with-props.vdom.js
index 744c6af2861..3fc18dc0cf0 100644
--- a/test/weex/cases/recycle-list/components/stateless-with-props.vdom.js
+++ b/test/weex/cases/recycle-list/components/stateless-with-props.vdom.js
@@ -23,20 +23,13 @@
       },
       children: [{
         type: 'image',
-        style: {
-          width: '750px',
-          height: '1000px'
-        },
+        classList: ['image'],
         attr: {
           src: { '@binding': 'imageUrl' }
         }
       }, {
         type: 'text',
-        style: {
-          fontSize: '80px',
-          textAlign: 'center',
-          color: '#E95659'
-        },
+        classList: ['title'],
         attr: {
           value: { '@binding': 'title' }
         }
diff --git a/test/weex/cases/recycle-list/components/stateless.vdom.js b/test/weex/cases/recycle-list/components/stateless.vdom.js
index a516132e0a9..3ae12d03b28 100644
--- a/test/weex/cases/recycle-list/components/stateless.vdom.js
+++ b/test/weex/cases/recycle-list/components/stateless.vdom.js
@@ -18,20 +18,10 @@
         '@isComponentRoot': true,
         '@componentProps': {}
       },
-      // not supported yet
-      // style: {
-      //   height: '120px',
-      //   justifyContent: 'center',
-      //   alignItems: 'center',
-      //   backgroundColor: 'rgb(162, 217, 192)'
-      // },
+      classList: ['banner'],
       children: [{
         type: 'text',
-        // style: {
-        //   fontWeight: 'bold',
-        //   color: '#41B883',
-        //   fontSize: '60px'
-        // },
+        classList: ['title'],
         attr: {
           value: 'BANNER'
         }
diff --git a/test/weex/cases/recycle-list/v-else-if.vdom.js b/test/weex/cases/recycle-list/v-else-if.vdom.js
index 30b38864b82..1181e267fb8 100644
--- a/test/weex/cases/recycle-list/v-else-if.vdom.js
+++ b/test/weex/cases/recycle-list/v-else-if.vdom.js
@@ -27,7 +27,7 @@
     }, {
       type: 'image',
       attr: {
-        '[[match]]': '!(!(item.sourceA) && (item.sourceB))',
+        '[[match]]': '!(item.sourceA || item.sourceB)',
         src: { '@binding': 'item.placeholder' }
       }
     }]
diff --git a/test/weex/cases/recycle-list/v-once.vdom.js b/test/weex/cases/recycle-list/v-once.vdom.js
new file mode 100644
index 00000000000..07e641977d0
--- /dev/null
+++ b/test/weex/cases/recycle-list/v-once.vdom.js
@@ -0,0 +1,22 @@
+({
+  type: 'recycle-list',
+  attr: {
+    append: 'tree',
+    listData: [
+      { type: 'A' },
+      { type: 'A' }
+    ],
+    alias: 'item'
+  },
+  children: [{
+    type: 'cell-slot',
+    attr: { append: 'tree' },
+    children: [{
+      type: 'text',
+      attr: {
+        '[[once]]': true,
+        value: { '@binding': 'item.type' }
+      }
+    }]
+  }]
+})
diff --git a/test/weex/cases/recycle-list/v-once.vue b/test/weex/cases/recycle-list/v-once.vue
new file mode 100644
index 00000000000..f1e3a367a8f
--- /dev/null
+++ b/test/weex/cases/recycle-list/v-once.vue
@@ -0,0 +1,21 @@
+<template>
+  <recycle-list for="item in list">
+    <cell-slot>
+      <text v-once>{{item.type}}</text>
+    </cell-slot>
+  </recycle-list>
+</template>
+
+<script>
+  module.exports = {
+    data () {
+      return {
+        list: [
+          { type: 'A' },
+          { type: 'A' }
+        ]
+      }
+    }
+  }
+</script>
+
diff --git a/test/weex/cases/render/class.vdom.js b/test/weex/cases/render/class.vdom.js
new file mode 100644
index 00000000000..7dec4ab57a9
--- /dev/null
+++ b/test/weex/cases/render/class.vdom.js
@@ -0,0 +1,19 @@
+({
+  type: 'div',
+  children: [{
+    type: 'div',
+    classList: ['box', 'box1']
+  }, {
+    type: 'div',
+    classList: ['box', 'box2']
+  }, {
+    type: 'div',
+    classList: ['box', 'box3']
+  }, {
+    type: 'div',
+    classList: ['box', 'box4']
+  }, {
+    type: 'div',
+    classList: ['box', 'box5']
+  }]
+})
diff --git a/test/weex/cases/render/class.vue b/test/weex/cases/render/class.vue
new file mode 100644
index 00000000000..f4443c50dd2
--- /dev/null
+++ b/test/weex/cases/render/class.vue
@@ -0,0 +1,56 @@
+<template>
+  <div>
+    <div :class="class1"></div>
+    <div :class="class2"></div>
+    <div class="box" :class="class3"></div>
+    <div class="box" :class="class4"></div>
+    <div class="box" :class="{ box5: class5 }"></div>
+  </div>
+</template>
+
+<style scoped>
+  .box {
+    width: 100px;
+    height: 100px;
+  }
+
+  .box1 {
+    background-color: #DDD;
+  }
+
+  .box2 {
+    background-color: #CCC;
+  }
+
+  .box3 {
+    background-color: #BBB;
+  }
+
+  .box4 {
+    background-color: #AAA;
+  }
+
+  .box5 {
+    background-color: #999;
+  }
+</style>
+
+<script>
+  module.exports = {
+    data () {
+      return {
+        class1: ['box', 'box1'],
+        class2: {
+          'box': true,
+          'box1': false,
+          'box2': true
+        },
+        class3: ['box3'],
+        class4: {
+          'box4': true
+        },
+        class5: true
+      }
+    }
+  }
+</script>
\ No newline at end of file
diff --git a/test/weex/cases/render/sample.vdom.js b/test/weex/cases/render/sample.vdom.js
index 6e213a506d9..1d9b198a0b2 100644
--- a/test/weex/cases/render/sample.vdom.js
+++ b/test/weex/cases/render/sample.vdom.js
@@ -8,10 +8,6 @@
     attr: {
       value: 'Yo'
     },
-    style: {
-      color: '#41B883',
-      fontSize: '233px',
-      textAlign: 'center'
-    }
+    classList: ['freestyle']
   }]
 })
diff --git a/test/weex/compiler/append.spec.js b/test/weex/compiler/append.spec.js
index 0492a6d0014..c75267c9078 100644
--- a/test/weex/compiler/append.spec.js
+++ b/test/weex/compiler/append.spec.js
@@ -28,7 +28,7 @@ describe('append props', () => {
   it('add append="tree" on <recycle-list>', () => {
     const { render, staticRenderFns, errors } = compile(`<recycle-list for="item in list"><div></div></recycle-list>`)
     expect(render + staticRenderFns).toMatch(strToRegExp(`appendAsTree:true`))
-    expect(render + staticRenderFns).toMatch(strToRegExp(`attrs:{"listData":list,"alias":"item","append":"tree"}`))
+    expect(render + staticRenderFns).toMatch(strToRegExp(`"append":"tree"`))
     expect(errors).toEqual([])
   })
 
diff --git a/test/weex/helpers/index.js b/test/weex/helpers/index.js
index fca2e1eafbc..ce74bf819db 100644
--- a/test/weex/helpers/index.js
+++ b/test/weex/helpers/index.js
@@ -58,7 +58,9 @@ export function compileVue (source, componentName) {
 
     const name = 'test_case_' + (Math.random() * 99999999).toFixed(0)
     const generateCode = styles => (`
+      try { weex.document.registerStyleSheets("${name}", [${JSON.stringify(styles)}]) } catch(e) {};
       var ${name} = Object.assign({
+        _scopeId: "${name}",
         style: ${JSON.stringify(styles)},
         render: function () { ${res.render} },
         ${res['@render'] ? ('"@render": function () {' + res['@render'] + '},') : ''}
@@ -114,10 +116,16 @@ function omitUseless (object) {
   if (isObject(object)) {
     delete object.ref
     for (const key in object) {
-      if (key.charAt(0) !== '@' && (isEmptyObject(object[key]) || object[key] === undefined)) {
+      omitUseless(object[key])
+      if (key === '@styleScope' ||
+        key === '@templateId' ||
+        key === 'bindingExpression') {
+        delete object[key]
+      }
+      if (key.charAt(0) !== '@' &&
+        (isEmptyObject(object[key]) || object[key] === undefined)) {
         delete object[key]
       }
-      omitUseless(object[key])
     }
   }
   return object
@@ -148,7 +156,7 @@ export function getEvents (instance) {
 export function fireEvent (instance, ref, type, event = {}) {
   const el = instance.document.getRef(ref)
   if (el) {
-    instance.document.fireEvent(el, type, event = {})
+    instance.document.fireEvent(el, type, event)
   }
 }
 
diff --git a/test/weex/jasmine.js b/test/weex/jasmine.js
new file mode 100644
index 00000000000..eaac3099a24
--- /dev/null
+++ b/test/weex/jasmine.js
@@ -0,0 +1,9 @@
+module.exports = {
+  spec_dir: 'test/weex',
+  spec_files: [
+    '**/*[sS]pec.js'
+  ],
+  helpers: [
+    require.resolve('@babel/register')
+  ]
+}
diff --git a/test/weex/jasmine.json b/test/weex/jasmine.json
deleted file mode 100644
index 1dba6930851..00000000000
--- a/test/weex/jasmine.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "spec_dir": "test/weex",
-  "spec_files": [
-    "**/*[sS]pec.js"
-  ],
-  "helpers": [
-    "../../node_modules/babel-register/lib/node.js"
-  ]
-}
diff --git a/test/weex/runtime/class.spec.js b/test/weex/runtime/class.spec.js
index 5809ba75633..ec704f7b3dd 100644
--- a/test/weex/runtime/class.spec.js
+++ b/test/weex/runtime/class.spec.js
@@ -17,7 +17,7 @@ describe('generate class', () => {
         type: 'div',
         children: [{
           type: 'text',
-          style: { fontSize: '100', color: '#ff0000', fontWeight: 'bold' },
+          classList: ['a', 'b', 'c'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -51,7 +51,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { fontSize: '100', color: '#ff0000' },
+          classList: ['a', 'b'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -63,7 +63,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { fontSize: '100', color: '#0000ff', fontWeight: 'bold' },
+          classList: ['a', 'd'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -96,7 +96,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { color: '#ff0000' },
+          classList: ['b', 'a'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -108,7 +108,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { color: '#0000ff' },
+          classList: ['b', 'a', 'c'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -139,7 +139,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { fontSize: '100', color: '#ff0000' },
+          classList: ['a', 'b'],
           attr: { value: 'Hello World' }
         }]
       })
@@ -151,7 +151,7 @@ describe('generate class', () => {
         event: ['click'],
         children: [{
           type: 'text',
-          style: { fontSize: '100', color: '', fontWeight: 'bold' },
+          classList: ['a', 'c'],
           attr: { value: 'Hello World' }
         }]
       })
diff --git a/test/weex/runtime/components/richtext.spec.js b/test/weex/runtime/components/richtext.spec.js
index f1c21caf9d1..7d104988c20 100644
--- a/test/weex/runtime/components/richtext.spec.js
+++ b/test/weex/runtime/components/richtext.spec.js
@@ -585,7 +585,7 @@ describe('richtext component', () => {
         }
       `)).toEqual({
         type: 'richtext',
-        style: { backgroundColor: '#FF6600', height: 200 },
+        classList: ['title'],
         attr: {
           value: [{
             type: 'span',
@@ -612,7 +612,8 @@ describe('richtext component', () => {
         }
       `)).toEqual({
         type: 'richtext',
-        style: { backgroundColor: '#FF6600', height: 200 },
+        classList: ['title'],
+        style: { backgroundColor: '#FF6600' },
         attr: {
           value: [{
             type: 'span',
diff --git a/types/index.d.ts b/types/index.d.ts
index 720180d2a5a..58ceb209e5d 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -1,4 +1,5 @@
 import { Vue } from "./vue";
+import "./umd";
 
 export default Vue;
 
@@ -13,6 +14,7 @@ export {
   ComponentOptions,
   FunctionalComponentOptions,
   RenderContext,
+  PropType,
   PropOptions,
   ComputedOptions,
   WatchHandler,
diff --git a/types/options.d.ts b/types/options.d.ts
index a54993fff5d..ff266052feb 100644
--- a/types/options.d.ts
+++ b/types/options.d.ts
@@ -1,5 +1,5 @@
 import { Vue, CreateElement, CombinedVueInstance } from "./vue";
-import { VNode, VNodeData, VNodeDirective } from "./vnode";
+import { VNode, VNodeData, VNodeDirective, NormalizedScopedSlot } from "./vnode";
 
 type Constructor = {
   new (...args: any[]): any;
@@ -12,14 +12,27 @@ export type Component<Data=DefaultData<never>, Methods=DefaultMethods<never>, Co
   | FunctionalComponentOptions<Props>
   | ComponentOptions<never, Data, Methods, Computed, Props>
 
-interface EsModuleComponent {
-  default: Component
-}
+type EsModule<T> = T | { default: T }
+
+type ImportedComponent<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps>
+  = EsModule<Component<Data, Methods, Computed, Props>>
+
+export type AsyncComponent<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps>
+  = AsyncComponentPromise<Data, Methods, Computed, Props>
+  | AsyncComponentFactory<Data, Methods, Computed, Props>
 
-export type AsyncComponent<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps> = (
+export type AsyncComponentPromise<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps> = (
   resolve: (component: Component<Data, Methods, Computed, Props>) => void,
   reject: (reason?: any) => void
-) => Promise<Component | EsModuleComponent> | void;
+) => Promise<ImportedComponent<Data, Methods, Computed, Props>> | void;
+
+export type AsyncComponentFactory<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps> = () => {
+  component: Promise<ImportedComponent<Data, Methods, Computed, Props>>;
+  loading?: ImportedComponent;
+  error?: ImportedComponent;
+  delay?: number;
+  timeout?: number;
+}
 
 /**
  * When the `Computed` type parameter on `ComponentOptions` is inferred,
@@ -31,12 +44,13 @@ export type Accessors<T> = {
   [K in keyof T]: (() => T[K]) | ComputedOptions<T[K]>
 }
 
+type DataDef<Data, Props, V> = Data | ((this: Readonly<Props> & V) => Data)
 /**
  * This type should be used when an array of strings is used for a component's `props` value.
  */
 export type ThisTypedComponentOptionsWithArrayProps<V extends Vue, Data, Methods, Computed, PropNames extends string> =
   object &
-  ComponentOptions<V, Data | ((this: Readonly<Record<PropNames, any>> & V) => Data), Methods, Computed, PropNames[]> &
+  ComponentOptions<V, DataDef<Data, Record<PropNames, any>, V>, Methods, Computed, PropNames[], Record<PropNames, any>> &
   ThisType<CombinedVueInstance<V, Data, Methods, Computed, Readonly<Record<PropNames, any>>>>;
 
 /**
@@ -44,7 +58,7 @@ export type ThisTypedComponentOptionsWithArrayProps<V extends Vue, Data, Methods
  */
 export type ThisTypedComponentOptionsWithRecordProps<V extends Vue, Data, Methods, Computed, Props> =
   object &
-  ComponentOptions<V, Data | ((this: Readonly<Props> & V) => Data), Methods, Computed, RecordPropsDefinition<Props>> &
+  ComponentOptions<V, DataDef<Data, Props, V>, Methods, Computed, RecordPropsDefinition<Props>, Props> &
   ThisType<CombinedVueInstance<V, Data, Methods, Computed, Readonly<Props>>>;
 
 type DefaultData<V> =  object | ((this: V) => object);
@@ -56,18 +70,20 @@ export interface ComponentOptions<
   Data=DefaultData<V>,
   Methods=DefaultMethods<V>,
   Computed=DefaultComputed,
-  PropsDef=PropsDefinition<DefaultProps>> {
+  PropsDef=PropsDefinition<DefaultProps>,
+  Props=DefaultProps> {
   data?: Data;
   props?: PropsDef;
   propsData?: object;
   computed?: Accessors<Computed>;
   methods?: Methods;
-  watch?: Record<string, WatchOptionsWithHandler<any> | WatchHandler<any> | string>;
+  watch?: Record<string, WatchOptionsWithHandler<any> | WatchHandler<any>>;
 
   el?: Element | string;
   template?: string;
-  render?(createElement: CreateElement): VNode;
-  renderError?: (h: () => VNode, err: Error) => VNode;
+  // hack is for functional component type inference, should not be used in user code
+  render?(createElement: CreateElement, hack: RenderContext<Props>): VNode;
+  renderError?(createElement: CreateElement, err: Error): VNode;
   staticRenderFns?: ((createElement: CreateElement) => VNode)[];
 
   beforeCreate?(this: V): void;
@@ -80,7 +96,8 @@ export interface ComponentOptions<
   updated?(): void;
   activated?(): void;
   deactivated?(): void;
-  errorCaptured?(): boolean | void;
+  errorCaptured?(err: Error, vm: Vue, info: string): boolean | void;
+  serverPrefetch?(this: V): Promise<void>;
 
   directives?: { [key: string]: DirectiveFunction | DirectiveOptions };
   components?: { [key: string]: Component<any, any, any, any> | AsyncComponent<any, any, any, any> };
@@ -108,9 +125,13 @@ export interface ComponentOptions<
 export interface FunctionalComponentOptions<Props = DefaultProps, PropDefs = PropsDefinition<Props>> {
   name?: string;
   props?: PropDefs;
+  model?: {
+    prop?: string;
+    event?: string;
+  };
   inject?: InjectOptions;
   functional: boolean;
-  render(this: undefined, createElement: CreateElement, context: RenderContext<Props>): VNode;
+  render?(this: undefined, createElement: CreateElement, context: RenderContext<Props>): VNode | VNode[];
 }
 
 export interface RenderContext<Props=DefaultProps> {
@@ -119,17 +140,21 @@ export interface RenderContext<Props=DefaultProps> {
   slots(): any;
   data: VNodeData;
   parent: Vue;
+  listeners: { [key: string]: Function | Function[] };
+  scopedSlots: { [key: string]: NormalizedScopedSlot };
   injections: any
 }
 
-export type Prop<T> = { (): T } | { new (...args: any[]): T & object }
+export type Prop<T> = { (): T } | { new(...args: never[]): T & object } | { new(...args: string[]): Function }
+
+export type PropType<T> = Prop<T> | Prop<T>[];
 
-export type PropValidator<T> = PropOptions<T> | Prop<T> | Prop<T>[];
+export type PropValidator<T> = PropOptions<T> | PropType<T>;
 
 export interface PropOptions<T=any> {
-  type?: Prop<T> | Prop<T>[];
+  type?: PropType<T>;
   required?: boolean;
-  default?: T | null | undefined | (() => object);
+  default?: T | null | undefined | (() => T | null | undefined);
   validator?(value: T): boolean;
 }
 
@@ -145,7 +170,7 @@ export interface ComputedOptions<T> {
   cache?: boolean;
 }
 
-export type WatchHandler<T> = (val: T, oldVal: T) => void;
+export type WatchHandler<T> = string | ((val: T, oldVal: T) => void);
 
 export interface WatchOptions {
   deep?: boolean;
@@ -156,9 +181,13 @@ export interface WatchOptionsWithHandler<T> extends WatchOptions {
   handler: WatchHandler<T>;
 }
 
+export interface DirectiveBinding extends Readonly<VNodeDirective> {
+  readonly modifiers: { [key: string]: boolean };
+}
+
 export type DirectiveFunction = (
   el: HTMLElement,
-  binding: VNodeDirective,
+  binding: DirectiveBinding,
   vnode: VNode,
   oldVnode: VNode
 ) => void;
diff --git a/types/test/async-component-test.ts b/types/test/async-component-test.ts
new file mode 100644
index 00000000000..baa50c4b915
--- /dev/null
+++ b/types/test/async-component-test.ts
@@ -0,0 +1,44 @@
+import Vue, { AsyncComponent, Component } from "../index";
+
+const a: AsyncComponent = () => ({
+  component: new Promise<Component>((res, rej) => {
+    res({ template: "" })
+  })
+})
+
+const b: AsyncComponent = () => ({
+  // @ts-expect-error component has to be a Promise that resolves to a component
+  component: () =>
+    new Promise<Component>((res, rej) => {
+      res({ template: "" })
+    })
+})
+
+const c: AsyncComponent = () =>
+  new Promise<Component>((res, rej) => {
+    res({
+      template: ""
+    })
+  })
+
+const d: AsyncComponent = () =>
+  new Promise<{ default: Component }>((res, rej) => {
+    res({
+      default: {
+        template: ""
+      }
+    })
+  })
+
+const e: AsyncComponent = () => ({
+  component: new Promise<{ default: Component }>((res, rej) => {
+    res({
+      default: {
+        template: ""
+      }
+    })
+  })
+})
+
+// Test that Vue.component accepts any AsyncComponent
+Vue.component("async-compponent1", a)
diff --git a/types/test/options-test.ts b/types/test/options-test.ts
index a14560fe1b3..cb8fa2e3f1b 100644
--- a/types/test/options-test.ts
+++ b/types/test/options-test.ts
@@ -1,5 +1,5 @@
-import Vue, { VNode } from "../index";
-import { AsyncComponent, ComponentOptions, FunctionalComponentOptions, Component } from "../index";
+import Vue, { PropType, VNode } from "../index";
+import { ComponentOptions, Component } from "../index";
 import { CreateElement } from "../vue";
 
 interface MyComponent extends Vue {
@@ -59,26 +59,64 @@ class Cat {
   private u = 1
 }
 
+interface IUser {
+  foo: string,
+  bar: number
+}
+
+interface ICat {
+  foo: any,
+  bar: object
+}
+type ConfirmCallback = (confirm: boolean) => void;
+
 Vue.component('union-prop', {
   props: {
-    primitive: [String, Number],
-    object: [Cat, User],
-    regex: RegExp,
-    mixed: [RegExp, Array],
-    union: [User, Number] as {new(): User | Number}[] // requires annotation
+    cat: Object as PropType<ICat>,
+    complexUnion: { type: [User, Number] as PropType<User | number> },
+    kittyUser: Object as PropType<ICat & IUser>,
+    callback: Function as PropType<ConfirmCallback>,
+    union: [User, Number] as PropType<User | number>
   },
   data() {
-    this.primitive;
-    this.object;
+    this.cat;
+    this.complexUnion;
+    this.kittyUser;
+    this.callback(true);
     this.union;
-    this.regex.compile;
-    this.mixed;
     return {
       fixedSize: this.union,
     }
   }
 });
 
+Vue.component('union-prop-with-no-casting', {
+  props: {
+    mixed: [RegExp, Array],
+    object: [Cat, User],
+    primitive: [String, Number],
+    regex: RegExp
+  },
+  data() {
+    this.mixed;
+    this.object;
+    this.primitive;
+    this.regex.compile;
+  }
+})
+
+Vue.component('prop-with-primitive-default', {
+  props: {
+    id: {
+      type: String,
+      default: () => String(Math.round(Math.random() * 10000000))
+    }
+  },
+  created(): void {
+    this.id;
+  }
+});
+
 Vue.component('component', {
   data() {
     this.$mount
@@ -113,7 +151,7 @@ Vue.component('component', {
     }
   },
   methods: {
-    plus() {
+    plus(): void {
       this.a++;
       this.aDouble.toFixed();
       this.aPlus = 1;
@@ -130,6 +168,10 @@ Vue.component('component', {
         this.a = val
       },
       deep: true
+    },
+    d: {
+      handler: 'someMethod',
+      immediate: true
     }
   },
   el: "#app",
@@ -142,6 +184,10 @@ Vue.component('component', {
       props: {
         myProp: "bar"
       },
+      directives: [{
+        name: 'a',
+        value: 'foo'
+      }],
       domProps: {
         innerHTML: "baz"
       },
@@ -160,7 +206,8 @@ Vue.component('component', {
         fontSize: '14px'
       },
       key: 'myKey',
-      ref: 'myRef'
+      ref: 'myRef',
+      refInFor: true
     }, [
       createElement(),
       createElement("div", "message"),
@@ -185,6 +232,9 @@ Vue.component('component', {
       [createElement("div", "message")]
     ]);
   },
+  renderError(createElement, err) {
+    return createElement('pre', { style: { color: 'red' }}, err.stack)
+  },
   staticRenderFns: [],
 
   beforeCreate() {
@@ -199,9 +249,15 @@ Vue.component('component', {
   updated() {},
   activated() {},
   deactivated() {},
-  errorCaptured() {
+  errorCaptured(err, vm, info) {
+    err.message
+    vm.$emit('error')
+    info.toUpperCase()
     return true
   },
+  serverPrefetch () {
+    return Promise.resolve()
+  },
 
   directives: {
     a: {
@@ -239,6 +295,18 @@ Vue.component('component', {
   delimiters: ["${", "}"]
 });
 
+
+Vue.component('custom-prop-type-function', {
+  props: {
+    callback: Function as PropType<(confirm: boolean) => void>,
+  },
+  methods: {
+    confirm(){
+      this.callback(true);
+    }
+  }
+});
+
 Vue.component('provide-inject', {
   provide: {
     foo: 1
@@ -258,6 +326,12 @@ Vue.component('provide-function', {
   })
 })
 
+Vue.component('component-with-slot', {
+  render (h): VNode {
+    return h('div', this.$slots.default)
+  }
+})
+
 Vue.component('component-with-scoped-slot', {
   render (h) {
     interface ScopedSlotProps {
@@ -274,15 +348,33 @@ Vue.component('component-with-scoped-slot', {
           // named scoped slot as vnode data
           item: (props: ScopedSlotProps) => [h('span', [props.msg])]
         }
+      }),
+      h('child', [
+        // return single VNode (will be normalized to an array)
+        (props: ScopedSlotProps) => h('span', [props.msg])
+      ]),
+      h('child', {
+        // Passing down all slots from parent
+        scopedSlots: this.$scopedSlots
+      }),
+      h('child', {
+        // Passing down single slot from parent
+        scopedSlots: {
+          default: this.$scopedSlots.default
+        }
       })
     ])
   },
   components: {
     child: {
       render (this: Vue, h: CreateElement) {
+        const defaultSlot = this.$scopedSlots['default']!({ msg: 'hi' })
+        defaultSlot && defaultSlot.forEach(vnode => {
+          vnode.tag
+        })
         return h('div', [
-          this.$scopedSlots['default']({ msg: 'hi' }),
-          this.$scopedSlots['item']({ msg: 'hello' })
+          defaultSlot,
+          this.$scopedSlots['item']!({ msg: 'hello' })
         ])
       }
     }
@@ -291,14 +383,25 @@ Vue.component('component-with-scoped-slot', {
 
 Vue.component('narrow-array-of-vnode-type', {
   render (h): VNode {
-    const slot = this.$scopedSlots.default({})
-    if (typeof slot !== 'string') {
+    const slot = this.$scopedSlots.default!({})
+    if (typeof slot === 'string') {
+      // <template slot-scope="data">bare string</template>
+      return h('span', slot)
+    } else if (Array.isArray(slot)) {
+      // template with multiple children
       const first = slot[0]
-      if (!Array.isArray(first) && typeof first !== 'string') {
-        return first;
+      if (!Array.isArray(first) && typeof first !== 'string' && first) {
+        return first
+      } else {
+        return h()
       }
+    } else if (slot) {
+      // <div slot-scope="data">bare VNode</div>
+      return slot
+    } else {
+      // empty template, slot === undefined
+      return h()
     }
-    return h();
   }
 })
 
@@ -312,6 +415,8 @@ Vue.component('functional-component', {
     context.slots();
     context.data;
     context.parent;
+    context.scopedSlots;
+    context.listeners.click;
     return createElement("div", {}, context.children);
   }
 });
@@ -330,6 +435,20 @@ Vue.component('functional-component-object-inject', {
   }
 })
 
+Vue.component('functional-component-check-optional', {
+  functional: true
+})
+
+Vue.component('functional-component-multi-root', {
+  functional: true,
+  render(h) {
+    return [
+      h("tr", [h("td", "foo"), h("td", "bar")]),
+      h("tr", [h("td", "lorem"), h("td", "ipsum")])
+    ]
+  }
+})
+
 Vue.component("async-component", ((resolve, reject) => {
   setTimeout(() => {
     resolve(Vue.component("component"));
@@ -342,4 +461,41 @@ Vue.component("async-component", ((resolve, reject) => {
   })
 }));
 
+Vue.component('functional-component-v-model', {
+  props: ['foo'],
+  functional: true,
+  model: {
+    prop: 'foo',
+    event: 'change'
+  },
+  render(createElement, context) {
+    return createElement("input", {
+      on: {
+        input: new Function()
+      },
+      domProps: {
+        value: context.props.foo
+      }
+    });
+  }
+});
+
+
 Vue.component('async-es-module-component', () => import('./es-module'))
+
+Vue.component('directive-expression-optional-string', {
+  render(createElement) {
+    return createElement("div", {
+      directives: [
+        {
+          name: 'has-expression',
+          value: 2,
+          expression: '1 + 1',
+        }, {
+          name: 'no-expression',
+          value: 'foo',
+        },
+      ],
+    })
+  }
+});
diff --git a/types/test/plugin-test.ts b/types/test/plugin-test.ts
index 15055614e80..ebb352e8239 100644
--- a/types/test/plugin-test.ts
+++ b/types/test/plugin-test.ts
@@ -2,8 +2,8 @@ import Vue from "../index";
 import { PluginFunction, PluginObject } from "../index";
 
 class Option {
-  prefix: string;
-  suffix: string;
+  prefix: string = "";
+  suffix: string = "";
 }
 
 const plugin: PluginObject<Option> = {
diff --git a/types/test/tsconfig.json b/types/test/tsconfig.json
index 15809b5f786..dab30a608bf 100644
--- a/types/test/tsconfig.json
+++ b/types/test/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "target": "es5",
+    "experimentalDecorators": true,
     "lib": [
       "dom",
       "es2015"
@@ -13,17 +14,9 @@
       "vue": ["../index.d.ts"]
     }
   },
-  "files": [
-    "../index.d.ts",
-    "../options.d.ts",
-    "../plugin.d.ts",
-    "../vnode.d.ts",
-    "../vue.d.ts",
-    "options-test.ts",
-    "plugin-test.ts",
-    "vue-test.ts",
-    "augmentation-test.ts",
-    "ssr-test.ts"
+  "include": [
+    "../*.d.ts",
+    "*.ts"
   ],
   "compileOnSave": false
 }
diff --git a/types/test/umd-test.ts b/types/test/umd-test.ts
new file mode 100644
index 00000000000..ffdc7046f92
--- /dev/null
+++ b/types/test/umd-test.ts
@@ -0,0 +1,7 @@
+const vm = new Vue({
+  template: "<div>hi</div>"
+});
+
+const options: Vue.ComponentOptions<Vue> = {
+  template: "<div>test</div>"
+};
diff --git a/types/test/vue-test.ts b/types/test/vue-test.ts
index 031a909b67a..626220d0aac 100644
--- a/types/test/vue-test.ts
+++ b/types/test/vue-test.ts
@@ -2,7 +2,7 @@ import Vue, { VNode } from "../index";
 import { ComponentOptions } from "../options";
 
 class Test extends Vue {
-  a: number;
+  a: number = 0;
 
   testProperties() {
     this.$data;
@@ -19,7 +19,8 @@ class Test extends Vue {
   }
 
   // test property reification
-  $refs: {
+  $el!: HTMLElement | SVGElement;
+  $refs!: {
     vue: Vue,
     element: HTMLInputElement,
     vues: Vue[],
@@ -73,6 +74,7 @@ class Test extends Vue {
     };
     config.keyCodes = { esc: 27 };
     config.ignoredElements = ['foo', /^ion-/];
+    config.async = false
   }
 
   static testMethods() {
@@ -84,10 +86,15 @@ class Test extends Vue {
       }
     });
     this.nextTick(() => {});
+    this.nextTick(function () {
+      console.log(this.text === 'test');
+    }, { text: 'test'});
     this.nextTick().then(() => {});
     this.set({}, "", "");
+    this.set({}, 1, "");
     this.set([true, false, true], 1, true);
     this.delete({}, "");
+    this.delete({}, 1);
     this.delete([true, false], 0);
     this.directive("", {bind() {}});
     this.filter("", (value: number) => value);
@@ -96,6 +103,15 @@ class Test extends Vue {
     this.use;
     this.mixin(Test);
     this.compile("<div>{{ message }}</div>");
+    this
+      .use(() => {
+
+      })
+      .use(() => {
+
+      })
+      .mixin({})
+      .mixin({});
   }
 }
 
@@ -131,6 +147,13 @@ const FunctionalHelloWorldComponent = Vue.extend({
   }
 });
 
+const FunctionalScopedSlotsComponent = Vue.extend({
+  functional: true,
+  render(h, ctx) {
+    return ctx.scopedSlots.default && ctx.scopedSlots.default({}) || h('div', 'functional scoped slots');
+  }
+});
+
 const Parent = Vue.extend({
   data() {
     return { greeting: 'Hello' }
@@ -180,3 +203,38 @@ Vue.extend({
     return h('canvas', {}, [a])
   }
 })
+
+declare function decorate<VC extends typeof Vue>(v: VC): VC;
+
+@decorate
+class Decorated extends Vue {
+  a = 123;
+}
+
+const obj = Vue.observable({ a: 1 })
+obj.a++
+
+// VNodeData style tests.
+const ComponentWithStyleInVNodeData = Vue.extend({
+  render (h) {
+    const elementWithStyleAsString = h('div', {
+      style: 'background-color: red;'
+    });
+
+    const elementWithStyleAsObject = h('div', {
+      style: { backgroundColor: 'green' }
+    });
+
+    const elementWithStyleAsArrayOfObjects = h('div', {
+      style: [
+        { backgroundColor: 'blue' }
+      ]
+    });
+
+    return h('div', undefined, [
+      elementWithStyleAsString,
+      elementWithStyleAsObject,
+      elementWithStyleAsArrayOfObjects
+    ]);
+  }
+});
diff --git a/types/umd.d.ts b/types/umd.d.ts
new file mode 100644
index 00000000000..d1dc8d15d66
--- /dev/null
+++ b/types/umd.d.ts
@@ -0,0 +1,48 @@
+import * as V from "./index";
+import {
+  DefaultData,
+  DefaultProps,
+  DefaultMethods,
+  DefaultComputed,
+  PropsDefinition
+} from "./options";
+
+// Expose some types for backward compatibility...
+declare namespace Vue {
+  // vue.d.ts
+  export type CreateElement = V.CreateElement;
+  export type VueConstructor<V extends Vue = Vue> = V.VueConstructor<V>;
+
+  // options.d.ts
+  export type Component<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps> = V.Component<Data, Methods, Computed, Props>;
+  export type AsyncComponent<Data=DefaultData<never>, Methods=DefaultMethods<never>, Computed=DefaultComputed, Props=DefaultProps> = V.AsyncComponent<Data, Methods, Computed, Props>;
+  export type ComponentOptions<V extends Vue, Data=DefaultData<V>, Methods=DefaultMethods<V>, Computed=DefaultComputed, PropsDef=PropsDefinition<DefaultProps>, Props=DefaultProps> = V.ComponentOptions<V, Data, Methods, Computed, PropsDef, Props>;
+  export type FunctionalComponentOptions<Props = DefaultProps, PropDefs = PropsDefinition<Props>> = V.FunctionalComponentOptions<Props, PropDefs>;
+  export type RenderContext<Props=DefaultProps> = V.RenderContext<Props>;
+  export type PropType<T> = V.PropType<T>;
+  export type PropOptions<T=any> = V.PropOptions<T>;
+  export type ComputedOptions<T> = V.ComputedOptions<T>;
+  export type WatchHandler<T> = V.WatchHandler<T>;
+  export type WatchOptions = V.WatchOptions;
+  export type WatchOptionsWithHandler<T> = V.WatchOptionsWithHandler<T>;
+  export type DirectiveFunction = V.DirectiveFunction;
+  export type DirectiveOptions = V.DirectiveOptions;
+
+  // plugin.d.ts
+  export type PluginFunction<T> = V.PluginFunction<T>;
+  export type PluginObject<T> = V.PluginObject<T>;
+
+  // vnode.d.ts
+  export type VNodeChildren = V.VNodeChildren;
+  export type VNodeChildrenArrayContents = V.VNodeChildrenArrayContents;
+  export type VNode = V.VNode;
+  export type VNodeComponentOptions = V.VNodeComponentOptions;
+  export type VNodeData = V.VNodeData;
+  export type VNodeDirective = V.VNodeDirective;
+}
+
+declare class Vue extends V.default {}
+
+export = Vue;
+
+export as namespace Vue;
diff --git a/types/vnode.d.ts b/types/vnode.d.ts
index 5754c433dcd..997980ce0b8 100644
--- a/types/vnode.d.ts
+++ b/types/vnode.d.ts
@@ -1,9 +1,16 @@
 import { Vue } from "./vue";
 
-export type ScopedSlot = (props: any) => VNodeChildrenArrayContents | string;
+export type ScopedSlot = (props: any) => ScopedSlotReturnValue;
+type ScopedSlotReturnValue = VNode | string | boolean | null | undefined | ScopedSlotReturnArray;
+interface ScopedSlotReturnArray extends Array<ScopedSlotReturnValue> {}
 
-export type VNodeChildren = VNodeChildrenArrayContents | [ScopedSlot] | string;
-export interface VNodeChildrenArrayContents extends Array<VNode | string | VNodeChildrenArrayContents> {}
+// Scoped slots are guaranteed to return Array of VNodes starting in 2.6
+export type NormalizedScopedSlot = (props: any) => ScopedSlotChildren;
+export type ScopedSlotChildren = VNode[] | undefined;
+
+// Relaxed type compatible with $createElement
+export type VNodeChildren = VNodeChildrenArrayContents | [ScopedSlot] | string | boolean | null | undefined;
+export interface VNodeChildrenArrayContents extends Array<VNodeChildren | VNode> {}
 
 export interface VNode {
   tag?: string;
@@ -13,7 +20,7 @@ export interface VNode {
   elm?: Node;
   ns?: string;
   context?: Vue;
-  key?: string | number;
+  key?: string | number | symbol | boolean;
   componentOptions?: VNodeComponentOptions;
   componentInstance?: Vue;
   parent?: VNode;
@@ -27,20 +34,21 @@ export interface VNodeComponentOptions {
   Ctor: typeof Vue;
   propsData?: object;
   listeners?: object;
-  children?: VNodeChildren;
+  children?: VNode[];
   tag?: string;
 }
 
 export interface VNodeData {
   key?: string | number;
   slot?: string;
-  scopedSlots?: { [key: string]: ScopedSlot };
+  scopedSlots?: { [key: string]: ScopedSlot | undefined };
   ref?: string;
+  refInFor?: boolean;
   tag?: string;
   staticClass?: string;
   class?: any;
   staticStyle?: { [key: string]: any };
-  style?: object[] | object;
+  style?: string | object[] | object;
   props?: { [key: string]: any };
   attrs?: { [key: string]: any };
   domProps?: { [key: string]: any };
@@ -58,10 +66,11 @@ export interface VNodeData {
 }
 
 export interface VNodeDirective {
-  readonly name: string;
-  readonly value: any;
-  readonly oldValue: any;
-  readonly expression: any;
-  readonly arg: string;
-  readonly modifiers: { [key: string]: boolean };
+  name: string;
+  value?: any;
+  oldValue?: any;
+  expression?: string;
+  arg?: string;
+  oldArg?: string;
+  modifiers?: { [key: string]: boolean };
 }
diff --git a/types/vue.d.ts b/types/vue.d.ts
index 045644e0a94..7adb5a53aec 100644
--- a/types/vue.d.ts
+++ b/types/vue.d.ts
@@ -12,7 +12,7 @@ import {
   ThisTypedComponentOptionsWithRecordProps,
   WatchOptions,
 } from "./options";
-import { VNode, VNodeData, VNodeChildren, ScopedSlot } from "./vnode";
+import { VNode, VNodeData, VNodeChildren, NormalizedScopedSlot } from "./vnode";
 import { PluginFunction, PluginObject } from "./plugin";
 
 export interface CreateElement {
@@ -21,14 +21,14 @@ export interface CreateElement {
 }
 
 export interface Vue {
-  readonly $el: HTMLElement;
+  readonly $el: Element;
   readonly $options: ComponentOptions<Vue>;
   readonly $parent: Vue;
   readonly $root: Vue;
   readonly $children: Vue[];
-  readonly $refs: { [key: string]: Vue | Element | Vue[] | Element[] };
-  readonly $slots: { [key: string]: VNode[] };
-  readonly $scopedSlots: { [key: string]: ScopedSlot };
+  readonly $refs: { [key: string]: Vue | Element | (Vue | Element)[] | undefined };
+  readonly $slots: { [key: string]: VNode[] | undefined };
+  readonly $scopedSlots: { [key: string]: NormalizedScopedSlot | undefined };
   readonly $isServer: boolean;
   readonly $data: Record<string, any>;
   readonly $props: Record<string, any>;
@@ -53,7 +53,7 @@ export interface Vue {
     options?: WatchOptions
   ): (() => void);
   $on(event: string | string[], callback: Function): this;
-  $once(event: string, callback: Function): this;
+  $once(event: string | string[], callback: Function): this;
   $off(event?: string | string[], callback?: Function): this;
   $emit(event: string, ...args: any[]): this;
   $nextTick(callback: (this: this) => void): void;
@@ -74,25 +74,26 @@ export interface VueConfiguration {
   warnHandler(msg: string, vm: Vue, trace: string): void;
   ignoredElements: (string | RegExp)[];
   keyCodes: { [key: string]: number | number[] };
+  async: boolean;
 }
 
 export interface VueConstructor<V extends Vue = Vue> {
   new <Data = object, Methods = object, Computed = object, PropNames extends string = never>(options?: ThisTypedComponentOptionsWithArrayProps<V, Data, Methods, Computed, PropNames>): CombinedVueInstance<V, Data, Methods, Computed, Record<PropNames, any>>;
-  // ideally, the return type should just contains Props, not Record<keyof Props, any>. But TS requires Base constructors must all have the same return type.
+  // ideally, the return type should just contain Props, not Record<keyof Props, any>. But TS requires to have Base constructors with the same return type.
   new <Data = object, Methods = object, Computed = object, Props = object>(options?: ThisTypedComponentOptionsWithRecordProps<V, Data, Methods, Computed, Props>): CombinedVueInstance<V, Data, Methods, Computed, Record<keyof Props, any>>;
   new (options?: ComponentOptions<V>): CombinedVueInstance<V, object, object, object, Record<keyof object, any>>;
 
-  extend<PropNames extends string = never>(definition: FunctionalComponentOptions<Record<PropNames, any>, PropNames[]>): ExtendedVue<V, {}, {}, {}, Record<PropNames, any>>;
-  extend<Props>(definition: FunctionalComponentOptions<Props, RecordPropsDefinition<Props>>): ExtendedVue<V, {}, {}, {}, Props>;
   extend<Data, Methods, Computed, PropNames extends string = never>(options?: ThisTypedComponentOptionsWithArrayProps<V, Data, Methods, Computed, PropNames>): ExtendedVue<V, Data, Methods, Computed, Record<PropNames, any>>;
   extend<Data, Methods, Computed, Props>(options?: ThisTypedComponentOptionsWithRecordProps<V, Data, Methods, Computed, Props>): ExtendedVue<V, Data, Methods, Computed, Props>;
+  extend<PropNames extends string = never>(definition: FunctionalComponentOptions<Record<PropNames, any>, PropNames[]>): ExtendedVue<V, {}, {}, {}, Record<PropNames, any>>;
+  extend<Props>(definition: FunctionalComponentOptions<Props, RecordPropsDefinition<Props>>): ExtendedVue<V, {}, {}, {}, Props>;
   extend(options?: ComponentOptions<V>): ExtendedVue<V, {}, {}, {}, {}>;
 
-  nextTick(callback: () => void, context?: any[]): void;
+  nextTick<T>(callback: (this: T) => void, context?: T): void;
   nextTick(): Promise<void>
-  set<T>(object: object, key: string, value: T): T;
+  set<T>(object: object, key: string | number, value: T): T;
   set<T>(array: T[], key: number, value: T): T;
-  delete(object: object, key: string): void;
+  delete(object: object, key: string | number): void;
   delete<T>(array: T[], key: number): void;
 
   directive(
@@ -104,21 +105,28 @@ export interface VueConstructor<V extends Vue = Vue> {
   component(id: string): VueConstructor;
   component<VC extends VueConstructor>(id: string, constructor: VC): VC;
   component<Data, Methods, Computed, Props>(id: string, definition: AsyncComponent<Data, Methods, Computed, Props>): ExtendedVue<V, Data, Methods, Computed, Props>;
-  component<PropNames extends string>(id: string, definition: FunctionalComponentOptions<Record<PropNames, any>, PropNames[]>): ExtendedVue<V, {}, {}, {}, Record<PropNames, any>>;
-  component<Props>(id: string, definition: FunctionalComponentOptions<Props, RecordPropsDefinition<Props>>): ExtendedVue<V, {}, {}, {}, Props>;
   component<Data, Methods, Computed, PropNames extends string = never>(id: string, definition?: ThisTypedComponentOptionsWithArrayProps<V, Data, Methods, Computed, PropNames>): ExtendedVue<V, Data, Methods, Computed, Record<PropNames, any>>;
   component<Data, Methods, Computed, Props>(id: string, definition?: ThisTypedComponentOptionsWithRecordProps<V, Data, Methods, Computed, Props>): ExtendedVue<V, Data, Methods, Computed, Props>;
+  component<PropNames extends string>(id: string, definition: FunctionalComponentOptions<Record<PropNames, any>, PropNames[]>): ExtendedVue<V, {}, {}, {}, Record<PropNames, any>>;
+  component<Props>(id: string, definition: FunctionalComponentOptions<Props, RecordPropsDefinition<Props>>): ExtendedVue<V, {}, {}, {}, Props>;
   component(id: string, definition?: ComponentOptions<V>): ExtendedVue<V, {}, {}, {}, {}>;
 
-  use<T>(plugin: PluginObject<T> | PluginFunction<T>, options?: T): void;
-  use(plugin: PluginObject<any> | PluginFunction<any>, ...options: any[]): void;
-  mixin(mixin: VueConstructor | ComponentOptions<Vue>): void;
+  use<T>(plugin: PluginObject<T> | PluginFunction<T>, options?: T): VueConstructor<V>;
+  use(plugin: PluginObject<any> | PluginFunction<any>, ...options: any[]): VueConstructor<V>;
+  mixin(mixin: VueConstructor | ComponentOptions<Vue>): VueConstructor<V>;
   compile(template: string): {
     render(createElement: typeof Vue.prototype.$createElement): VNode;
     staticRenderFns: (() => VNode)[];
   };
 
+  observable<T>(obj: T): T;
+
+  util: {
+    warn(msg: string, vm?: InstanceType<VueConstructor>): void;
+  };
+
   config: VueConfiguration;
+  version: string;
 }
 
 export const Vue: VueConstructor;
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 00000000000..0477ff0359f
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,8409 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@babel/code-frame@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.0.0.tgz#06e2ab19bdb535385559aabb5ba59729482800f8"
+  integrity sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==
+  dependencies:
+    "@babel/highlight" "^7.0.0"
+
+"@babel/core@^7.0.0":
+  version "7.2.2"
+  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.2.2.tgz#07adba6dde27bb5ad8d8672f15fde3e08184a687"
+  integrity sha512-59vB0RWt09cAct5EIe58+NzGP4TFSD3Bz//2/ELy3ZeTeKF6VTD1AXlH8BGGbCX0PuobZBsIzO7IAI9PH67eKw==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    "@babel/generator" "^7.2.2"
+    "@babel/helpers" "^7.2.0"
+    "@babel/parser" "^7.2.2"
+    "@babel/template" "^7.2.2"
+    "@babel/traverse" "^7.2.2"
+    "@babel/types" "^7.2.2"
+    convert-source-map "^1.1.0"
+    debug "^4.1.0"
+    json5 "^2.1.0"
+    lodash "^4.17.10"
+    resolve "^1.3.2"
+    semver "^5.4.1"
+    source-map "^0.5.0"
+
+"@babel/generator@^7.0.0", "@babel/generator@^7.2.2":
+  version "7.2.2"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.2.2.tgz#18c816c70962640eab42fe8cae5f3947a5c65ccc"
+  integrity sha512-I4o675J/iS8k+P38dvJ3IBGqObLXyQLTxtrR4u9cSUJOURvafeEWb/pFMOTwtNrmq73mJzyF6ueTbO1BtN0Zeg==
+  dependencies:
+    "@babel/types" "^7.2.2"
+    jsesc "^2.5.1"
+    lodash "^4.17.10"
+    source-map "^0.5.0"
+    trim-right "^1.0.1"
+
+"@babel/helper-annotate-as-pure@^7.0.0":
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+  resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz#323d39dd0b50e10c7c06ca7d7638e6864d8c5c32"
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+  dependencies:
+    "@babel/types" "^7.0.0"
+
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+  resolved "https://registry.yarnpkg.com/@babel/helper-builder-binary-assignment-operator-visitor/-/helper-builder-binary-assignment-operator-visitor-7.1.0.tgz#6b69628dfe4087798e0c4ed98e3d4a6b2fbd2f5f"
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+  dependencies:
+    "@babel/helper-explode-assignable-expression" "^7.1.0"
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-call-delegate@^7.1.0":
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+  resolved "https://registry.yarnpkg.com/@babel/helper-call-delegate/-/helper-call-delegate-7.1.0.tgz#6a957f105f37755e8645343d3038a22e1449cc4a"
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+  dependencies:
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+    "@babel/traverse" "^7.1.0"
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-create-class-features-plugin@^7.2.3":
+  version "7.2.3"
+  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.2.3.tgz#f6e719abb90cb7f4a69591e35fd5eb89047c4a7c"
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+  dependencies:
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+    "@babel/helper-member-expression-to-functions" "^7.0.0"
+    "@babel/helper-optimise-call-expression" "^7.0.0"
+    "@babel/helper-plugin-utils" "^7.0.0"
+    "@babel/helper-replace-supers" "^7.2.3"
+
+"@babel/helper-define-map@^7.1.0":
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-define-map/-/helper-define-map-7.1.0.tgz#3b74caec329b3c80c116290887c0dd9ae468c20c"
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+  dependencies:
+    "@babel/helper-function-name" "^7.1.0"
+    "@babel/types" "^7.0.0"
+    lodash "^4.17.10"
+
+"@babel/helper-explode-assignable-expression@^7.1.0":
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.1.0.tgz#537fa13f6f1674df745b0c00ec8fe4e99681c8f6"
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+  dependencies:
+    "@babel/traverse" "^7.1.0"
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-function-name@^7.1.0":
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz#a0ceb01685f73355d4360c1247f582bfafc8ff53"
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+  dependencies:
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+    "@babel/template" "^7.1.0"
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-get-function-arity@^7.0.0":
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+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0.tgz#83572d4320e2a4657263734113c42868b64e49c3"
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+  dependencies:
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-hoist-variables@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.0.0.tgz#46adc4c5e758645ae7a45deb92bab0918c23bb88"
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+  dependencies:
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-member-expression-to-functions@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.0.0.tgz#8cd14b0a0df7ff00f009e7d7a436945f47c7a16f"
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+  dependencies:
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-module-imports@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.0.0.tgz#96081b7111e486da4d2cd971ad1a4fe216cc2e3d"
+  integrity sha512-aP/hlLq01DWNEiDg4Jn23i+CXxW/owM4WpDLFUbpjxe4NS3BhLVZQ5i7E0ZrxuQ/vwekIeciyamgB1UIYxxM6A==
+  dependencies:
+    "@babel/types" "^7.0.0"
+
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+  dependencies:
+    "@babel/helper-module-imports" "^7.0.0"
+    "@babel/helper-simple-access" "^7.1.0"
+    "@babel/helper-split-export-declaration" "^7.0.0"
+    "@babel/template" "^7.2.2"
+    "@babel/types" "^7.2.2"
+    lodash "^4.17.10"
+
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+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0.tgz#a2920c5702b073c15de51106200aa8cad20497d5"
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+  dependencies:
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-plugin-utils@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0.tgz#bbb3fbee98661c569034237cc03967ba99b4f250"
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+
+"@babel/helper-regex@^7.0.0":
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+  resolved "https://registry.yarnpkg.com/@babel/helper-regex/-/helper-regex-7.0.0.tgz#2c1718923b57f9bbe64705ffe5640ac64d9bdb27"
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+  dependencies:
+    lodash "^4.17.10"
+
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+  resolved "https://registry.yarnpkg.com/@babel/helper-remap-async-to-generator/-/helper-remap-async-to-generator-7.1.0.tgz#361d80821b6f38da75bd3f0785ece20a88c5fe7f"
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+  dependencies:
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+    "@babel/helper-wrap-function" "^7.1.0"
+    "@babel/template" "^7.1.0"
+    "@babel/traverse" "^7.1.0"
+    "@babel/types" "^7.0.0"
+
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+  dependencies:
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+    "@babel/helper-optimise-call-expression" "^7.0.0"
+    "@babel/traverse" "^7.2.3"
+    "@babel/types" "^7.0.0"
+
+"@babel/helper-simple-access@^7.1.0":
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+  resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.1.0.tgz#65eeb954c8c245beaa4e859da6188f39d71e585c"
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+  dependencies:
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+    "@babel/types" "^7.0.0"
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+"@babel/helper-split-export-declaration@^7.0.0":
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+
+"@babel/helper-wrap-function@^7.1.0":
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+  dependencies:
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+    "@babel/template" "^7.1.0"
+    "@babel/traverse" "^7.1.0"
+    "@babel/types" "^7.2.0"
+
+"@babel/helpers@^7.2.0":
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.2.0.tgz#8335f3140f3144270dc63c4732a4f8b0a50b7a21"
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+  dependencies:
+    "@babel/template" "^7.1.2"
+    "@babel/traverse" "^7.1.5"
+    "@babel/types" "^7.2.0"
+
+"@babel/highlight@^7.0.0":
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/@babel/highlight/-/highlight-7.0.0.tgz#f710c38c8d458e6dd9a201afb637fcb781ce99e4"
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+  dependencies:
+    chalk "^2.0.0"
+    esutils "^2.0.2"
+    js-tokens "^4.0.0"
+
+"@babel/parser@^7.0.0", "@babel/parser@^7.2.2", "@babel/parser@^7.2.3":
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+"@webassemblyjs/wasm-opt@1.7.11":
+  version "1.7.11"
+  resolved "https://registry.yarnpkg.com/@webassemblyjs/wasm-opt/-/wasm-opt-1.7.11.tgz#b331e8e7cef8f8e2f007d42c3a36a0580a7d6ca7"
+  integrity sha512-XynkOwQyiRidh0GLua7SkeHvAPXQV/RxsUeERILmAInZegApOUAIJfRuPYe2F7RcjOC9tW3Cb9juPvAC/sCqvg==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/helper-buffer" "1.7.11"
+    "@webassemblyjs/wasm-gen" "1.7.11"
+    "@webassemblyjs/wasm-parser" "1.7.11"
+
+"@webassemblyjs/wasm-parser@1.7.11":
+  version "1.7.11"
+  resolved "https://registry.yarnpkg.com/@webassemblyjs/wasm-parser/-/wasm-parser-1.7.11.tgz#6e3d20fa6a3519f6b084ef9391ad58211efb0a1a"
+  integrity sha512-6lmXRTrrZjYD8Ng8xRyvyXQJYUQKYSXhJqXOBLw24rdiXsHAOlvw5PhesjdcaMadU/pyPQOJ5dHreMjBxwnQKg==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/helper-api-error" "1.7.11"
+    "@webassemblyjs/helper-wasm-bytecode" "1.7.11"
+    "@webassemblyjs/ieee754" "1.7.11"
+    "@webassemblyjs/leb128" "1.7.11"
+    "@webassemblyjs/utf8" "1.7.11"
+
+"@webassemblyjs/wast-parser@1.7.11":
+  version "1.7.11"
+  resolved "https://registry.yarnpkg.com/@webassemblyjs/wast-parser/-/wast-parser-1.7.11.tgz#25bd117562ca8c002720ff8116ef9072d9ca869c"
+  integrity sha512-lEyVCg2np15tS+dm7+JJTNhNWq9yTZvi3qEhAIIOaofcYlUp0UR5/tVqOwa/gXYr3gjwSZqw+/lS9dscyLelbQ==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/floating-point-hex-parser" "1.7.11"
+    "@webassemblyjs/helper-api-error" "1.7.11"
+    "@webassemblyjs/helper-code-frame" "1.7.11"
+    "@webassemblyjs/helper-fsm" "1.7.11"
+    "@xtuc/long" "4.2.1"
+
+"@webassemblyjs/wast-printer@1.7.11":
+  version "1.7.11"
+  resolved "https://registry.yarnpkg.com/@webassemblyjs/wast-printer/-/wast-printer-1.7.11.tgz#c4245b6de242cb50a2cc950174fdbf65c78d7813"
+  integrity sha512-m5vkAsuJ32QpkdkDOUPGSltrg8Cuk3KBx4YrmAGQwCZPRdUHXxG4phIOuuycLemHFr74sWL9Wthqss4fzdzSwg==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/wast-parser" "1.7.11"
+    "@xtuc/long" "4.2.1"
+
+"@xtuc/ieee754@^1.2.0":
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@xtuc/ieee754/-/ieee754-1.2.0.tgz#eef014a3145ae477a1cbc00cd1e552336dceb790"
+  integrity sha512-DX8nKgqcGwsc0eJSqYt5lwP4DH5FlHnmuWWBRy7X0NcaGR0ZtuyeESgMwTYVEtxmsNGY+qit4QYT/MIYTOTPeA==
+
+"@xtuc/long@4.2.1":
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/@xtuc/long/-/long-4.2.1.tgz#5c85d662f76fa1d34575766c5dcd6615abcd30d8"
+  integrity sha512-FZdkNBDqBRHKQ2MEbSC17xnPFOhZxeJ2YGSfr2BKf3sujG49Qe3bB+rGCwQfIaA7WHnGeGkSijX4FuBCdrzW/g==
+
+JSONStream@^1.0.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/JSONStream/-/JSONStream-1.3.5.tgz#3208c1f08d3a4d99261ab64f92302bc15e111ca0"
+  integrity sha512-E+iruNOY8VV9s4JEbe1aNEm6MiszPRr/UfcHMz0TQh1BXSxHK+ASV1R6W4HpjBhSeS+54PIsAMCBmwD06LLsqQ==
+  dependencies:
+    jsonparse "^1.2.0"
+    through ">=2.2.7 <3"
+
+abbrev@1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
+  integrity sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==
+
+abbrev@1.0.x:
+  version "1.0.9"
+  resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.0.9.tgz#91b4792588a7738c25f35dd6f63752a2f8776135"
+  integrity sha1-kbR5JYinc4wl813W9jdSovh3YTU=
+
+accepts@~1.3.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.5.tgz#eb777df6011723a3b14e8a72c0805c8e86746bd2"
+  integrity sha1-63d99gEXI6OxTopywIBcjoZ0a9I=
+  dependencies:
+    mime-types "~2.1.18"
+    negotiator "0.6.1"
+
+acorn-dynamic-import@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/acorn-dynamic-import/-/acorn-dynamic-import-3.0.0.tgz#901ceee4c7faaef7e07ad2a47e890675da50a278"
+  integrity sha512-zVWV8Z8lislJoOKKqdNMOB+s6+XV5WERty8MnKBeFgwA+19XJjJHs2RP5dzM57FftIs+jQnRToLiWazKr6sSWg==
+  dependencies:
+    acorn "^5.0.0"
+
+acorn-jsx@^5.0.0:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.1.tgz#32a064fd925429216a09b141102bfdd185fae40e"
+  integrity sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==
+
+acorn@^5.0.0, acorn@^5.2.1, acorn@^5.6.2:
+  version "5.7.3"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
+  integrity sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==
+
+acorn@^6.0.2, acorn@^6.0.4:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.0.5.tgz#81730c0815f3f3b34d8efa95cb7430965f4d887a"
+  integrity sha512-i33Zgp3XWtmZBMNvCr4azvOFeWVw1Rk6p3hfi3LUDvIFraOMywb1kAtrbi+med14m4Xfpqm3zRZMT+c0FNE7kg==
+
+adm-zip@~0.4.3:
+  version "0.4.13"
+  resolved "https://registry.yarnpkg.com/adm-zip/-/adm-zip-0.4.13.tgz#597e2f8cc3672151e1307d3e95cddbc75672314a"
+  integrity sha512-fERNJX8sOXfel6qCBCMPvZLzENBEhZTzKqg6vrOW5pvoEaQuJhRU4ndTAh6lHOxn1I6jnz2NHra56ZODM751uw==
+
+after@0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/after/-/after-0.8.2.tgz#fedb394f9f0e02aa9768e702bda23b505fae7e1f"
+  integrity sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=
+
+agent-base@2:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-2.1.1.tgz#d6de10d5af6132d5bd692427d46fc538539094c7"
+  integrity sha1-1t4Q1a9hMtW9aSQn1G/FOFOQlMc=
+  dependencies:
+    extend "~3.0.0"
+    semver "~5.0.1"
+
+agent-base@^4.1.0:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.2.1.tgz#d89e5999f797875674c07d87f260fc41e83e8ca9"
+  integrity sha512-JVwXMr9nHYTUXsBFKUqhJwvlcYU/blreOEUkhNR2eXZIvwd+c+o5V4MgDPKWnMS/56awN3TRzIP+KoPn+roQtg==
+  dependencies:
+    es6-promisify "^5.0.0"
+
+ajv-errors@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.1.tgz#f35986aceb91afadec4102fbd85014950cefa64d"
+  integrity sha512-DCRfO/4nQ+89p/RK43i8Ezd41EqdGIU4ld7nGF8OQ14oc/we5rEntLCUa7+jrn3nn83BosfwZA0wb4pon2o8iQ==
+
+ajv-keywords@^3.1.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
+  integrity sha1-6GuBnGAs+IIa1jdBNpjx3sAhhHo=
+
+ajv@^6.1.0, ajv@^6.5.3, ajv@^6.5.5, ajv@^6.6.1:
+  version "6.12.6"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
+  integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
+  dependencies:
+    fast-deep-equal "^3.1.1"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.4.1"
+    uri-js "^4.2.2"
+
+amdefine@>=0.0.4:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
+  integrity sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=
+
+ansi-colors@^3.0.0:
+  version "3.2.3"
+  resolved "https://registry.yarnpkg.com/ansi-colors/-/ansi-colors-3.2.3.tgz#57d35b8686e851e2cc04c403f1c00203976a1813"
+  integrity sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw==
+
+ansi-escapes@^1.1.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
+  integrity sha1-06ioOzGapneTZisT52HHkRQiMG4=
+
+ansi-escapes@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-3.1.0.tgz#f73207bb81207d75fd6c83f125af26eea378ca30"
+  integrity sha512-UgAb8H9D41AQnu/PbWlCofQVcnV4Gs2bBJi9eZPxfU/hgglFh3SMDMENRIqdr7H6XFnXdoknctFByVsCOotTVw==
+
+ansi-regex@^2.0.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
+  integrity sha1-w7M6te42DYbg5ijwRorn7yfWVN8=
+
+ansi-regex@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-3.0.0.tgz#ed0317c322064f79466c02966bddb605ab37d998"
+  integrity sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=
+
+ansi-regex@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-4.0.0.tgz#70de791edf021404c3fd615aa89118ae0432e5a9"
+  integrity sha512-iB5Dda8t/UqpPI/IjsejXu5jOGDrzn41wJyljwPH65VCIbk6+1BzFIMJGFwTNrYXT1CrD+B4l19U7awiQ8rk7w==
+
+ansi-styles@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
+  integrity sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=
+
+ansi-styles@^3.2.0, ansi-styles@^3.2.1:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
+  integrity sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==
+  dependencies:
+    color-convert "^1.9.0"
+
+any-observable@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/any-observable/-/any-observable-0.3.0.tgz#af933475e5806a67d0d7df090dd5e8bef65d119b"
+  integrity sha512-/FQM1EDkTsf63Ub2C6O7GuYFDsSXUwsaZDurV0np41ocwq0jthUAYCmhBX9f+KwlaCgIuWyr/4WlUQUBfKfZog==
+
+anymatch@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
+  integrity sha512-5teOsQWABXHHBFP9y3skS5P3d/WfWXpv3FUpy+LorMrNYaT9pI4oLMQX7jzQ2KklNpGpWHzdCXTDT2Y3XGlZBw==
+  dependencies:
+    micromatch "^3.1.4"
+    normalize-path "^2.1.1"
+
+aproba@^1.0.3, aproba@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/aproba/-/aproba-1.2.0.tgz#6802e6264efd18c790a1b0d517f0f2627bf2c94a"
+  integrity sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw==
+
+are-we-there-yet@~1.1.2:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz#4b35c2944f062a8bfcda66410760350fe9ddfc21"
+  integrity sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==
+  dependencies:
+    delegates "^1.0.0"
+    readable-stream "^2.0.6"
+
+argparse@^1.0.7:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
+  integrity sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==
+  dependencies:
+    sprintf-js "~1.0.2"
+
+argv@^0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/argv/-/argv-0.0.2.tgz#ecbd16f8949b157183711b1bda334f37840185ab"
+  integrity sha1-7L0W+JSbFXGDcRsb2jNPN4QBhas=
+
+arr-diff@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-2.0.0.tgz#8f3b827f955a8bd669697e4a4256ac3ceae356cf"
+  integrity sha1-jzuCf5Vai9ZpaX5KQlasPOrjVs8=
+  dependencies:
+    arr-flatten "^1.0.1"
+
+arr-diff@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-4.0.0.tgz#d6461074febfec71e7e15235761a329a5dc7c520"
+  integrity sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=
+
+arr-flatten@^1.0.1, arr-flatten@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/arr-flatten/-/arr-flatten-1.1.0.tgz#36048bbff4e7b47e136644316c99669ea5ae91f1"
+  integrity sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==
+
+arr-union@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
+  integrity sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=
+
+array-find-index@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/array-find-index/-/array-find-index-1.0.2.tgz#df010aa1287e164bbda6f9723b0a96a1ec4187a1"
+  integrity sha1-3wEKoSh+Fku9pvlyOwqWoexBh6E=
+
+array-ify@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/array-ify/-/array-ify-1.0.0.tgz#9e528762b4a9066ad163a6962a364418e9626ece"
+  integrity sha1-nlKHYrSpBmrRY6aWKjZEGOlibs4=
+
+array-slice@^0.2.3:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/array-slice/-/array-slice-0.2.3.tgz#dd3cfb80ed7973a75117cdac69b0b99ec86186f5"
+  integrity sha1-3Tz7gO15c6dRF82sabC5nshhhvU=
+
+array-union@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
+  integrity sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=
+  dependencies:
+    array-uniq "^1.0.1"
+
+array-uniq@^1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/array-uniq/-/array-uniq-1.0.3.tgz#af6ac877a25cc7f74e058894753858dfdb24fdb6"
+  integrity sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=
+
+array-unique@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.2.1.tgz#a1d97ccafcbc2625cc70fadceb36a50c58b01a53"
+  integrity sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=
+
+array-unique@^0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.3.2.tgz#a894b75d4bc4f6cd679ef3244a9fd8f46ae2d428"
+  integrity sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=
+
+arraybuffer.slice@~0.0.7:
+  version "0.0.7"
+  resolved "https://registry.yarnpkg.com/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz#3bbc4275dd584cc1b10809b89d4e8b63a69e7675"
+  integrity sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog==
+
+arrify@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
+  integrity sha1-iYUI2iIm84DfkEcoRWhJwVAaSw0=
+
+asn1.js@^4.0.0:
+  version "4.10.1"
+  resolved "https://registry.yarnpkg.com/asn1.js/-/asn1.js-4.10.1.tgz#b9c2bf5805f1e64aadeed6df3a2bfafb5a73f5a0"
+  integrity sha512-p32cOF5q0Zqs9uBiONKYLm6BClCoBCM5O9JfeUSlnQLBTxYdTK+pW+nXflm8UkKd2UYlEbYz5qEi0JuZR9ckSw==
+  dependencies:
+    bn.js "^4.0.0"
+    inherits "^2.0.1"
+    minimalistic-assert "^1.0.0"
+
+asn1@~0.2.3:
+  version "0.2.4"
+  resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.4.tgz#8d2475dfab553bb33e77b54e59e880bb8ce23136"
+  integrity sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==
+  dependencies:
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+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
+
+body-parser@^1.16.1:
+  version "1.18.3"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.18.3.tgz#5b292198ffdd553b3a0f20ded0592b956955c8b4"
+  integrity sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=
+  dependencies:
+    bytes "3.0.0"
+    content-type "~1.0.4"
+    debug "2.6.9"
+    depd "~1.1.2"
+    http-errors "~1.6.3"
+    iconv-lite "0.4.23"
+    on-finished "~2.3.0"
+    qs "6.5.2"
+    raw-body "2.3.3"
+    type-is "~1.6.16"
+
+brace-expansion@^1.0.0, brace-expansion@^1.1.7:
+  version "1.1.11"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
+  integrity sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==
+  dependencies:
+    balanced-match "^1.0.0"
+    concat-map "0.0.1"
+
+braces@^0.1.2:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-0.1.5.tgz#c085711085291d8b75fdd74eab0f8597280711e6"
+  integrity sha1-wIVxEIUpHYt1/ddOqw+FlygHEeY=
+  dependencies:
+    expand-range "^0.1.0"
+
+braces@^1.8.2:
+  version "1.8.5"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-1.8.5.tgz#ba77962e12dff969d6b76711e914b737857bf6a7"
+  integrity sha1-uneWLhLf+WnWt2cR6RS3N4V79qc=
+  dependencies:
+    expand-range "^1.8.1"
+    preserve "^0.2.0"
+    repeat-element "^1.1.2"
+
+braces@^2.3.0, braces@^2.3.1:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-2.3.2.tgz#5979fd3f14cd531565e5fa2df1abfff1dfaee729"
+  integrity sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==
+  dependencies:
+    arr-flatten "^1.1.0"
+    array-unique "^0.3.2"
+    extend-shallow "^2.0.1"
+    fill-range "^4.0.0"
+    isobject "^3.0.1"
+    repeat-element "^1.1.2"
+    snapdragon "^0.8.1"
+    snapdragon-node "^2.0.1"
+    split-string "^3.0.2"
+    to-regex "^3.0.1"
+
+brorand@^1.0.1, brorand@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
+  integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
+
+browser-stdout@1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/browser-stdout/-/browser-stdout-1.3.0.tgz#f351d32969d32fa5d7a5567154263d928ae3bd1f"
+  integrity sha1-81HTKWnTL6XXpVZxVCY9korjvR8=
+
+browserify-aes@^1.0.0, browserify-aes@^1.0.4:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/browserify-aes/-/browserify-aes-1.2.0.tgz#326734642f403dabc3003209853bb70ad428ef48"
+  integrity sha512-+7CHXqGuspUn/Sl5aO7Ea0xWGAtETPXNSAjHo48JfLdPWcMng33Xe4znFvQweqc/uzk5zSOI3H52CYnjCfb5hA==
+  dependencies:
+    buffer-xor "^1.0.3"
+    cipher-base "^1.0.0"
+    create-hash "^1.1.0"
+    evp_bytestokey "^1.0.3"
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+browserify-cipher@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/browserify-cipher/-/browserify-cipher-1.0.1.tgz#8d6474c1b870bfdabcd3bcfcc1934a10e94f15f0"
+  integrity sha512-sPhkz0ARKbf4rRQt2hTpAHqn47X3llLkUGn+xEJzLjwY8LRs2p0v7ljvI5EyoRO/mexrNunNECisZs+gw2zz1w==
+  dependencies:
+    browserify-aes "^1.0.4"
+    browserify-des "^1.0.0"
+    evp_bytestokey "^1.0.0"
+
+browserify-des@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/browserify-des/-/browserify-des-1.0.2.tgz#3af4f1f59839403572f1c66204375f7a7f703e9c"
+  integrity sha512-BioO1xf3hFwz4kc6iBhI3ieDFompMhrMlnDFC4/0/vd5MokpuAc3R+LYbwTA9A5Yc9pq9UYPqffKpW2ObuwX5A==
+  dependencies:
+    cipher-base "^1.0.1"
+    des.js "^1.0.0"
+    inherits "^2.0.1"
+    safe-buffer "^5.1.2"
+
+browserify-rsa@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/browserify-rsa/-/browserify-rsa-4.0.1.tgz#21e0abfaf6f2029cf2fafb133567a701d4135524"
+  integrity sha1-IeCr+vbyApzy+vsTNWenAdQTVSQ=
+  dependencies:
+    bn.js "^4.1.0"
+    randombytes "^2.0.1"
+
+browserify-sign@^4.0.0:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/browserify-sign/-/browserify-sign-4.0.4.tgz#aa4eb68e5d7b658baa6bf6a57e630cbd7a93d298"
+  integrity sha1-qk62jl17ZYuqa/alfmMMvXqT0pg=
+  dependencies:
+    bn.js "^4.1.1"
+    browserify-rsa "^4.0.0"
+    create-hash "^1.1.0"
+    create-hmac "^1.1.2"
+    elliptic "^6.0.0"
+    inherits "^2.0.1"
+    parse-asn1 "^5.0.0"
+
+browserify-zlib@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/browserify-zlib/-/browserify-zlib-0.2.0.tgz#2869459d9aa3be245fe8fe2ca1f46e2e7f54d73f"
+  integrity sha512-Z942RysHXmJrhqk88FmKBVq/v5tqmSkDz7p54G/MGyjMnCFFnC79XWNbg+Vta8W6Wb2qtSZTSxIGkJrRpCFEiA==
+  dependencies:
+    pako "~1.0.5"
+
+browserslist@^4.3.4:
+  version "4.3.7"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.3.7.tgz#f1de479a6466ea47a0a26dcc725e7504817e624a"
+  integrity sha512-pWQv51Ynb0MNk9JGMCZ8VkM785/4MQNXiFYtPqI7EEP0TJO+/d/NqRVn1uiAN0DNbnlUSpL2sh16Kspasv3pUQ==
+  dependencies:
+    caniuse-lite "^1.0.30000925"
+    electron-to-chromium "^1.3.96"
+    node-releases "^1.1.3"
+
+buble@^0.19.3, buble@^0.19.6:
+  version "0.19.6"
+  resolved "https://registry.yarnpkg.com/buble/-/buble-0.19.6.tgz#915909b6bd5b11ee03b1c885ec914a8b974d34d3"
+  integrity sha512-9kViM6nJA1Q548Jrd06x0geh+BG2ru2+RMDkIHHgJY/8AcyCs34lTHwra9BX7YdPrZXd5aarkpr/SY8bmPgPdg==
+  dependencies:
+    chalk "^2.4.1"
+    magic-string "^0.25.1"
+    minimist "^1.2.0"
+    os-homedir "^1.0.1"
+    regexpu-core "^4.2.0"
+    vlq "^1.0.0"
+
+buffer-alloc-unsafe@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/buffer-alloc-unsafe/-/buffer-alloc-unsafe-1.1.0.tgz#bd7dc26ae2972d0eda253be061dba992349c19f0"
+  integrity sha512-TEM2iMIEQdJ2yjPJoSIsldnleVaAk1oW3DBVUykyOLsEsFmEc9kn+SFFPz+gl54KQNxlDnAwCXosOS9Okx2xAg==
+
+buffer-alloc@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/buffer-alloc/-/buffer-alloc-1.2.0.tgz#890dd90d923a873e08e10e5fd51a57e5b7cce0ec"
+  integrity sha512-CFsHQgjtW1UChdXgbyJGtnm+O/uLQeZdtbDo8mfUgYXCHSM1wgrVxXm6bSyrUuErEb+4sYVGCzASBRot7zyrow==
+  dependencies:
+    buffer-alloc-unsafe "^1.1.0"
+    buffer-fill "^1.0.0"
+
+buffer-fill@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/buffer-fill/-/buffer-fill-1.0.0.tgz#f8f78b76789888ef39f205cd637f68e702122b2c"
+  integrity sha1-+PeLdniYiO858gXNY39o5wISKyw=
+
+buffer-from@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
+  integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
+
+buffer-xor@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
+  integrity sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=
+
+buffer@^4.3.0:
+  version "4.9.1"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
+  integrity sha1-bRu2AbB6TvztlwlBMgkwJ8lbwpg=
+  dependencies:
+    base64-js "^1.0.2"
+    ieee754 "^1.1.4"
+    isarray "^1.0.0"
+
+builtin-modules@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
+  integrity sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=
+
+builtin-modules@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-3.0.0.tgz#1e587d44b006620d90286cc7a9238bbc6129cab1"
+  integrity sha512-hMIeU4K2ilbXV6Uv93ZZ0Avg/M91RaKXucQ+4me2Do1txxBDyDZWCBa5bJSLqoNTRpXTLwEzIk1KmloenDDjhg==
+
+builtin-status-codes@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"
+  integrity sha1-hZgoeOIbmOHGZCXgPQF0eI9Wnug=
+
+bytes@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.0.0.tgz#d32815404d689699f85a4ea4fa8755dd13a96048"
+  integrity sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=
+
+cacache@^11.0.2:
+  version "11.3.2"
+  resolved "https://registry.yarnpkg.com/cacache/-/cacache-11.3.2.tgz#2d81e308e3d258ca38125b676b98b2ac9ce69bfa"
+  integrity sha512-E0zP4EPGDOaT2chM08Als91eYnf8Z+eH1awwwVsngUmgppfM5jjJ8l3z5vO5p5w/I3LsiXawb1sW0VY65pQABg==
+  dependencies:
+    bluebird "^3.5.3"
+    chownr "^1.1.1"
+    figgy-pudding "^3.5.1"
+    glob "^7.1.3"
+    graceful-fs "^4.1.15"
+    lru-cache "^5.1.1"
+    mississippi "^3.0.0"
+    mkdirp "^0.5.1"
+    move-concurrently "^1.0.1"
+    promise-inflight "^1.0.1"
+    rimraf "^2.6.2"
+    ssri "^6.0.1"
+    unique-filename "^1.1.1"
+    y18n "^4.0.0"
+
+cache-base@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"
+  integrity sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==
+  dependencies:
+    collection-visit "^1.0.0"
+    component-emitter "^1.2.1"
+    get-value "^2.0.6"
+    has-value "^1.0.0"
+    isobject "^3.0.1"
+    set-value "^2.0.0"
+    to-object-path "^0.3.0"
+    union-value "^1.0.0"
+    unset-value "^1.0.0"
+
+cachedir@^1.1.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/cachedir/-/cachedir-1.3.0.tgz#5e01928bf2d95b5edd94b0942188246740e0dbc4"
+  integrity sha512-O1ji32oyON9laVPJL1IZ5bmwd2cB46VfpxkDequezH+15FDzzVddEyrGEeX4WusDSqKxdyFdDQDEG1yo1GoWkg==
+  dependencies:
+    os-homedir "^1.0.1"
+
+callsite@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/callsite/-/callsite-1.0.0.tgz#280398e5d664bd74038b6f0905153e6e8af1bc20"
+  integrity sha1-KAOY5dZkvXQDi28JBRU+borxvCA=
+
+callsites@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/callsites/-/callsites-3.0.0.tgz#fb7eb569b72ad7a45812f93fd9430a3e410b3dd3"
+  integrity sha512-tWnkwu9YEq2uzlBDI4RcLn8jrFvF9AOi8PxDNU3hZZjJcjkcRAq3vCI+vZcg1SuxISDYe86k9VZFwAxDiJGoAw==
+
+camelcase-keys@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
+  integrity sha1-MIvur/3ygRkFHvodkyITyRuPkuc=
+  dependencies:
+    camelcase "^2.0.0"
+    map-obj "^1.0.0"
+
+camelcase-keys@^4.0.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-4.2.0.tgz#a2aa5fb1af688758259c32c141426d78923b9b77"
+  integrity sha1-oqpfsa9oh1glnDLBQUJteJI7m3c=
+  dependencies:
+    camelcase "^4.1.0"
+    map-obj "^2.0.0"
+    quick-lru "^1.0.0"
+
+camelcase@^2.0.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-2.1.1.tgz#7c1d16d679a1bbe59ca02cacecfb011e201f5a1f"
+  integrity sha1-fB0W1nmhu+WcoCys7PsBHiAfWh8=
+
+camelcase@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
+  integrity sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=
+
+caniuse-lite@^1.0.30000925:
+  version "1.0.30000927"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000927.tgz#114a9de4ff1e01f5790fe578ecd93421c7524665"
+  integrity sha512-ogq4NbUWf1uG/j66k0AmiO3GjqJAlQyF8n4w8a954cbCyFKmYGvRtgz6qkq2fWuduTXHibX7GyYL5Pg58Aks2g==
+
+caseless@~0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.12.0.tgz#1b681c21ff84033c826543090689420d187151dc"
+  integrity sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw=
+
+chai-nightwatch@~0.1.x:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/chai-nightwatch/-/chai-nightwatch-0.1.1.tgz#1ca56de768d3c0868fe7fc2f4d32c2fe894e6be9"
+  integrity sha1-HKVt52jTwIaP5/wvTTLC/olOa+k=
+  dependencies:
+    assertion-error "1.0.0"
+    deep-eql "0.1.3"
+
+chalk@1.1.3, chalk@^1.0.0, chalk@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
+  integrity sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=
+  dependencies:
+    ansi-styles "^2.2.1"
+    escape-string-regexp "^1.0.2"
+    has-ansi "^2.0.0"
+    strip-ansi "^3.0.0"
+    supports-color "^2.0.0"
+
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.1.0, chalk@^2.3.0, chalk@^2.3.1, chalk@^2.4.1:
+  version "2.4.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
+  integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
+  dependencies:
+    ansi-styles "^3.2.1"
+    escape-string-regexp "^1.0.5"
+    supports-color "^5.3.0"
+
+chardet@^0.4.0:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.4.2.tgz#b5473b33dc97c424e5d98dc87d55d4d8a29c8bf2"
+  integrity sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=
+
+chardet@^0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
+  integrity sha512-mT8iDcrh03qDGRRmoA2hmBJnxpllMR+0/0qlzjqZES6NdiWDcZkCNAk4rPFZ9Q85r27unkiNNg8ZOiwZXBHwcA==
+
+chokidar@^2.0.2, chokidar@^2.0.3:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.0.4.tgz#356ff4e2b0e8e43e322d18a372460bbcf3accd26"
+  integrity sha512-z9n7yt9rOvIJrMhvDtDictKrkFHeihkNl6uWMmZlmL6tJtX9Cs+87oK+teBx+JIgzvbX3yZHT3eF8vpbDxHJXQ==
+  dependencies:
+    anymatch "^2.0.0"
+    async-each "^1.0.0"
+    braces "^2.3.0"
+    glob-parent "^3.1.0"
+    inherits "^2.0.1"
+    is-binary-path "^1.0.0"
+    is-glob "^4.0.0"
+    lodash.debounce "^4.0.8"
+    normalize-path "^2.1.1"
+    path-is-absolute "^1.0.0"
+    readdirp "^2.0.0"
+    upath "^1.0.5"
+  optionalDependencies:
+    fsevents "^1.2.2"
+
+chownr@^1.1.1, chownr@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/chownr/-/chownr-1.1.4.tgz#6fc9d7b42d32a583596337666e7d08084da2cc6b"
+  integrity sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg==
+
+chrome-trace-event@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/chrome-trace-event/-/chrome-trace-event-1.0.0.tgz#45a91bd2c20c9411f0963b5aaeb9a1b95e09cc48"
+  integrity sha512-xDbVgyfDTT2piup/h8dK/y4QZfJRSa73bw1WZ8b4XM1o7fsFubUVGYcE+1ANtOzJJELGpYoG2961z0Z6OAld9A==
+  dependencies:
+    tslib "^1.9.0"
+
+chromedriver@^2.45.0:
+  version "2.45.0"
+  resolved "https://registry.yarnpkg.com/chromedriver/-/chromedriver-2.45.0.tgz#8c1b158adbbd3e0ca3f7af19d459082245554378"
+  integrity sha512-Qwmcr+2mU3INeR6mVsQ8gO00vZpL8ZeTJLclX44C0dcs88jrSDgckPqbG+qkVX+m2L/aOPnF0lYgPdOiOiLt5w==
+  dependencies:
+    del "^3.0.0"
+    extract-zip "^1.6.7"
+    mkdirp "^0.5.1"
+    request "^2.88.0"
+    tcp-port-used "^1.0.1"
+
+ci-info@^1.5.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/ci-info/-/ci-info-1.6.0.tgz#2ca20dbb9ceb32d4524a683303313f0304b1e497"
+  integrity sha512-vsGdkwSCDpWmP80ncATX7iea5DWQemg1UgCW5J8tqjU3lYw4FBYuj89J0CTVomA7BEfvSZd84GmHko+MxFQU2A==
+
+cipher-base@^1.0.0, cipher-base@^1.0.1, cipher-base@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/cipher-base/-/cipher-base-1.0.4.tgz#8760e4ecc272f4c363532f926d874aae2c1397de"
+  integrity sha512-Kkht5ye6ZGmwv40uUDZztayT2ThLQGfnj/T71N/XzeZeo3nf8foyW7zGTsPYkEya3m5f3cAypH+qe7YOrM1U2Q==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+circular-json@^0.3.1:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.3.tgz#815c99ea84f6809529d2f45791bdf82711352d66"
+  integrity sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==
+
+circular-json@^0.5.5:
+  version "0.5.9"
+  resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.5.9.tgz#932763ae88f4f7dead7a0d09c8a51a4743a53b1d"
+  integrity sha512-4ivwqHpIFJZBuhN3g/pEcdbnGUywkBblloGbkglyloVjjR3uT6tieI89MVOfbP2tHX5sgb01FuLgAOzebNlJNQ==
+
+class-utils@^0.3.5:
+  version "0.3.6"
+  resolved "https://registry.yarnpkg.com/class-utils/-/class-utils-0.3.6.tgz#f93369ae8b9a7ce02fd41faad0ca83033190c463"
+  integrity sha512-qOhPa/Fj7s6TY8H8esGu5QNpMMQxz79h+urzrNYN6mn+9BnxlDGf5QZ+XeCDsxSjPqsSR56XOZOJmpeurnLMeg==
+  dependencies:
+    arr-union "^3.1.0"
+    define-property "^0.2.5"
+    isobject "^3.0.0"
+    static-extend "^0.1.1"
+
+cli-cursor@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
+  integrity sha1-ZNo/fValRBLll5S9Ytw1KV6PKYc=
+  dependencies:
+    restore-cursor "^1.0.1"
+
+cli-cursor@^2.0.0, cli-cursor@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-2.1.0.tgz#b35dac376479facc3e94747d41d0d0f5238ffcb5"
+  integrity sha1-s12sN2R5+sw+lHR9QdDQ9SOP/LU=
+  dependencies:
+    restore-cursor "^2.0.0"
+
+cli-truncate@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/cli-truncate/-/cli-truncate-0.2.1.tgz#9f15cfbb0705005369216c626ac7d05ab90dd574"
+  integrity sha1-nxXPuwcFAFNpIWxiasfQWrkN1XQ=
+  dependencies:
+    slice-ansi "0.0.4"
+    string-width "^1.0.1"
+
+cli-width@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.2.0.tgz#ff19ede8a9a5e579324147b0c11f0fbcbabed639"
+  integrity sha1-/xnt6Kml5XkyQUewwR8PvLq+1jk=
+
+co@~3.0.6:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/co/-/co-3.0.6.tgz#1445f226c5eb956138e68c9ac30167ea7d2e6bda"
+  integrity sha1-FEXyJsXrlWE45oyawwFn6n0ua9o=
+
+code-point-at@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
+  integrity sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=
+
+codecov@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/codecov/-/codecov-3.1.0.tgz#340bd968d361f256976b5af782dd8ba9f82bc849"
+  integrity sha512-aWQc/rtHbcWEQLka6WmBAOpV58J2TwyXqlpAQGhQaSiEUoigTTUk6lLd2vB3kXkhnDyzyH74RXfmV4dq2txmdA==
+  dependencies:
+    argv "^0.0.2"
+    ignore-walk "^3.0.1"
+    js-yaml "^3.12.0"
+    request "^2.87.0"
+    urlgrey "^0.4.4"
+
+collection-visit@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/collection-visit/-/collection-visit-1.0.0.tgz#4bc0373c164bc3291b4d368c829cf1a80a59dca0"
+  integrity sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=
+  dependencies:
+    map-visit "^1.0.0"
+    object-visit "^1.0.0"
+
+color-convert@^1.9.0:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
+  integrity sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==
+  dependencies:
+    color-name "1.1.3"
+
+color-name@1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.3.tgz#a7d0558bd89c42f795dd42328f740831ca53bc25"
+  integrity sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=
+
+colors@^1.1.0:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.3.3.tgz#39e005d546afe01e01f9c4ca8fa50f686a01205d"
+  integrity sha512-mmGt/1pZqYRjMxB1axhTo16/snVZ5krrKkcmMeVKxzECMMXoCgnvTPp10QgHfcbQZw8Dq2jMNG6je4JlWU0gWg==
+
+colors@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/colors/-/colors-1.4.0.tgz#c50491479d4c1bdaed2c9ced32cf7c7dc2360f78"
+  integrity sha512-a+UqTh4kgZg/SlGvfbzDHpgRu7AAQOmmqRHJnxhRZICKFUT91brVhNNt58CMWU9PsBbv3PDCZUHbVxuDiH2mtA==
+
+combine-lists@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/combine-lists/-/combine-lists-1.0.1.tgz#458c07e09e0d900fc28b70a3fec2dacd1d2cb7f6"
+  integrity sha1-RYwH4J4NkA/Ci3Cj/sLazR0st/Y=
+  dependencies:
+    lodash "^4.5.0"
+
+combined-stream@^1.0.6, combined-stream@~1.0.6:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.7.tgz#2d1d24317afb8abe95d6d2c0b07b57813539d828"
+  integrity sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==
+  dependencies:
+    delayed-stream "~1.0.0"
+
+commander@2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
+  integrity sha1-nJkJQXbhIkDLItbFFGCYQA/g99Q=
+  dependencies:
+    graceful-readlink ">= 1.0.0"
+
+commander@^2.14.1, commander@^2.9.0:
+  version "2.19.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
+  integrity sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==
+
+commander@~2.17.1:
+  version "2.17.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
+  integrity sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==
+
+commitizen@^2.9.6:
+  version "2.10.1"
+  resolved "https://registry.yarnpkg.com/commitizen/-/commitizen-2.10.1.tgz#8c395def34a895f4e94952c2efc3c9eb4c3683bd"
+  integrity sha1-jDld7zSolfTpSVLC78PJ60w2g70=
+  dependencies:
+    cachedir "^1.1.0"
+    chalk "1.1.3"
+    cz-conventional-changelog "2.0.0"
+    dedent "0.6.0"
+    detect-indent "4.0.0"
+    find-node-modules "1.0.4"
+    find-root "1.0.0"
+    fs-extra "^1.0.0"
+    glob "7.1.1"
+    inquirer "1.2.3"
+    lodash "4.17.5"
+    minimist "1.2.0"
+    opencollective "1.0.3"
+    path-exists "2.1.0"
+    shelljs "0.7.6"
+    strip-json-comments "2.0.1"
+
+commondir@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
+  integrity sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=
+
+compare-func@^1.3.1:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/compare-func/-/compare-func-1.3.2.tgz#99dd0ba457e1f9bc722b12c08ec33eeab31fa648"
+  integrity sha1-md0LpFfh+bxyKxLAjsM+6rMfpkg=
+  dependencies:
+    array-ify "^1.0.0"
+    dot-prop "^3.0.0"
+
+component-bind@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/component-bind/-/component-bind-1.0.0.tgz#00c608ab7dcd93897c0009651b1d3a8e1e73bbd1"
+  integrity sha1-AMYIq33Nk4l8AAllGx06jh5zu9E=
+
+component-emitter@1.2.1, component-emitter@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
+  integrity sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=
+
+component-inherit@0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/component-inherit/-/component-inherit-0.0.3.tgz#645fc4adf58b72b649d5cae65135619db26ff143"
+  integrity sha1-ZF/ErfWLcrZJ1crmUTVhnbJv8UM=
+
+concat-map@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
+  integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
+
+concat-stream@1.6.2, concat-stream@^1.4.7, concat-stream@^1.5.0:
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
+  integrity sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==
+  dependencies:
+    buffer-from "^1.0.0"
+    inherits "^2.0.3"
+    readable-stream "^2.2.2"
+    typedarray "^0.0.6"
+
+connect@^3.6.0:
+  version "3.6.6"
+  resolved "https://registry.yarnpkg.com/connect/-/connect-3.6.6.tgz#09eff6c55af7236e137135a72574858b6786f524"
+  integrity sha1-Ce/2xVr3I24TcTWnJXSFi2eG9SQ=
+  dependencies:
+    debug "2.6.9"
+    finalhandler "1.1.0"
+    parseurl "~1.3.2"
+    utils-merge "1.0.1"
+
+console-browserify@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/console-browserify/-/console-browserify-1.1.0.tgz#f0241c45730a9fc6323b206dbf38edc741d0bb10"
+  integrity sha1-8CQcRXMKn8YyOyBtvzjtx0HQuxA=
+  dependencies:
+    date-now "^0.1.4"
+
+console-control-strings@^1.0.0, console-control-strings@~1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
+  integrity sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=
+
+constants-browserify@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/constants-browserify/-/constants-browserify-1.0.0.tgz#c20b96d8c617748aaf1c16021760cd27fcb8cb75"
+  integrity sha1-wguW2MYXdIqvHBYCF2DNJ/y4y3U=
+
+content-type@~1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
+  integrity sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==
+
+conventional-changelog-angular@^1.6.6:
+  version "1.6.6"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-angular/-/conventional-changelog-angular-1.6.6.tgz#b27f2b315c16d0a1f23eb181309d0e6a4698ea0f"
+  integrity sha512-suQnFSqCxRwyBxY68pYTsFkG0taIdinHLNEAX5ivtw8bCRnIgnpvcHmlR/yjUyZIrNPYAoXlY1WiEKWgSE4BNg==
+  dependencies:
+    compare-func "^1.3.1"
+    q "^1.5.1"
+
+conventional-changelog-atom@^0.2.8:
+  version "0.2.8"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-atom/-/conventional-changelog-atom-0.2.8.tgz#8037693455990e3256f297320a45fa47ee553a14"
+  integrity sha512-8pPZqhMbrnltNBizjoDCb/Sz85KyUXNDQxuAEYAU5V/eHn0okMBVjqc8aHWYpHrytyZWvMGbayOlDv7i8kEf6g==
+  dependencies:
+    q "^1.5.1"
+
+conventional-changelog-codemirror@^0.3.8:
+  version "0.3.8"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-codemirror/-/conventional-changelog-codemirror-0.3.8.tgz#a1982c8291f4ee4d6f2f62817c6b2ecd2c4b7b47"
+  integrity sha512-3HFZKtBXTaUCHvz7ai6nk2+psRIkldDoNzCsom0egDtVmPsvvHZkzjynhdQyULfacRSsBTaiQ0ol6nBOL4dDiQ==
+  dependencies:
+    q "^1.5.1"
+
+conventional-changelog-core@^2.0.11:
+  version "2.0.11"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-core/-/conventional-changelog-core-2.0.11.tgz#19b5fbd55a9697773ed6661f4e32030ed7e30287"
+  integrity sha512-HvTE6RlqeEZ/NFPtQeFLsIDOLrGP3bXYr7lFLMhCVsbduF1MXIe8OODkwMFyo1i9ku9NWBwVnVn0jDmIFXjDRg==
+  dependencies:
+    conventional-changelog-writer "^3.0.9"
+    conventional-commits-parser "^2.1.7"
+    dateformat "^3.0.0"
+    get-pkg-repo "^1.0.0"
+    git-raw-commits "^1.3.6"
+    git-remote-origin-url "^2.0.0"
+    git-semver-tags "^1.3.6"
+    lodash "^4.2.1"
+    normalize-package-data "^2.3.5"
+    q "^1.5.1"
+    read-pkg "^1.1.0"
+    read-pkg-up "^1.0.1"
+    through2 "^2.0.0"
+
+conventional-changelog-ember@^0.3.12:
+  version "0.3.12"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-ember/-/conventional-changelog-ember-0.3.12.tgz#b7d31851756d0fcb49b031dffeb6afa93b202400"
+  integrity sha512-mmJzA7uzbrOqeF89dMMi6z17O07ORTXlTMArnLG9ZTX4oLaKNolUlxFUFlFm9JUoVWajVpaHQWjxH1EOQ+ARoQ==
+  dependencies:
+    q "^1.5.1"
+
+conventional-changelog-eslint@^1.0.9:
+  version "1.0.9"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-eslint/-/conventional-changelog-eslint-1.0.9.tgz#b13cc7e4b472c819450ede031ff1a75c0e3d07d3"
+  integrity sha512-h87nfVh2fdk9fJIvz26wCBsbDC/KxqCc5wSlNMZbXcARtbgNbNDIF7Y7ctokFdnxkzVdaHsbINkh548T9eBA7Q==
+  dependencies:
+    q "^1.5.1"
+
+conventional-changelog-express@^0.3.6:
+  version "0.3.6"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-express/-/conventional-changelog-express-0.3.6.tgz#4a6295cb11785059fb09202180d0e59c358b9c2c"
+  integrity sha512-3iWVtBJZ9RnRnZveNDzOD8QRn6g6vUif0qVTWWyi5nUIAbuN1FfPVyKdAlJJfp5Im+dE8Kiy/d2SpaX/0X678Q==
+  dependencies:
+    q "^1.5.1"
+
+conventional-changelog-jquery@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-jquery/-/conventional-changelog-jquery-0.1.0.tgz#0208397162e3846986e71273b6c79c5b5f80f510"
+  integrity sha1-Agg5cWLjhGmG5xJztsecW1+A9RA=
+  dependencies:
+    q "^1.4.1"
+
+conventional-changelog-jscs@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-jscs/-/conventional-changelog-jscs-0.1.0.tgz#0479eb443cc7d72c58bf0bcf0ef1d444a92f0e5c"
+  integrity sha1-BHnrRDzH1yxYvwvPDvHURKkvDlw=
+  dependencies:
+    q "^1.4.1"
+
+conventional-changelog-jshint@^0.3.8:
+  version "0.3.8"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-jshint/-/conventional-changelog-jshint-0.3.8.tgz#9051c1ac0767abaf62a31f74d2fe8790e8acc6c8"
+  integrity sha512-hn9QU4ZI/5V50wKPJNPGT4gEWgiBFpV6adieILW4MaUFynuDYOvQ71EMSj3EznJyKi/KzuXpc9dGmX8njZMjig==
+  dependencies:
+    compare-func "^1.3.1"
+    q "^1.5.1"
+
+conventional-changelog-preset-loader@^1.1.8:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-preset-loader/-/conventional-changelog-preset-loader-1.1.8.tgz#40bb0f142cd27d16839ec6c74ee8db418099b373"
+  integrity sha512-MkksM4G4YdrMlT2MbTsV2F6LXu/hZR0Tc/yenRrDIKRwBl/SP7ER4ZDlglqJsCzLJi4UonBc52Bkm5hzrOVCcw==
+
+conventional-changelog-writer@^3.0.9:
+  version "3.0.9"
+  resolved "https://registry.yarnpkg.com/conventional-changelog-writer/-/conventional-changelog-writer-3.0.9.tgz#4aecdfef33ff2a53bb0cf3b8071ce21f0e994634"
+  integrity sha512-n9KbsxlJxRQsUnK6wIBRnARacvNnN4C/nxnxCkH+B/R1JS2Fa+DiP1dU4I59mEDEjgnFaN2+9wr1P1s7GYB5/Q==
+  dependencies:
+    compare-func "^1.3.1"
+    conventional-commits-filter "^1.1.6"
+    dateformat "^3.0.0"
+    handlebars "^4.0.2"
+    json-stringify-safe "^5.0.1"
+    lodash "^4.2.1"
+    meow "^4.0.0"
+    semver "^5.5.0"
+    split "^1.0.0"
+    through2 "^2.0.0"
+
+conventional-changelog@^1.1.3:
+  version "1.1.24"
+  resolved "https://registry.yarnpkg.com/conventional-changelog/-/conventional-changelog-1.1.24.tgz#3d94c29c960f5261c002678315b756cdd3d7d1f0"
+  integrity sha512-2WcSUst4Y3Z4hHvoMTWXMJr/DmgVdLiMOVY1Kak2LfFz+GIz2KDp5naqbFesYbfXPmaZ5p491dO0FWZIJoJw1Q==
+  dependencies:
+    conventional-changelog-angular "^1.6.6"
+    conventional-changelog-atom "^0.2.8"
+    conventional-changelog-codemirror "^0.3.8"
+    conventional-changelog-core "^2.0.11"
+    conventional-changelog-ember "^0.3.12"
+    conventional-changelog-eslint "^1.0.9"
+    conventional-changelog-express "^0.3.6"
+    conventional-changelog-jquery "^0.1.0"
+    conventional-changelog-jscs "^0.1.0"
+    conventional-changelog-jshint "^0.3.8"
+    conventional-changelog-preset-loader "^1.1.8"
+
+conventional-commit-types@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/conventional-commit-types/-/conventional-commit-types-2.2.0.tgz#5db95739d6c212acbe7b6f656a11b940baa68946"
+  integrity sha1-XblXOdbCEqy+e29lahG5QLqmiUY=
+
+conventional-commits-filter@^1.1.6:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/conventional-commits-filter/-/conventional-commits-filter-1.1.6.tgz#4389cd8e58fe89750c0b5fb58f1d7f0cc8ad3831"
+  integrity sha512-KcDgtCRKJCQhyk6VLT7zR+ZOyCnerfemE/CsR3iQpzRRFbLEs0Y6rwk3mpDvtOh04X223z+1xyJ582Stfct/0Q==
+  dependencies:
+    is-subset "^0.1.1"
+    modify-values "^1.0.0"
+
+conventional-commits-parser@^2.1.7:
+  version "2.1.7"
+  resolved "https://registry.yarnpkg.com/conventional-commits-parser/-/conventional-commits-parser-2.1.7.tgz#eca45ed6140d72ba9722ee4132674d639e644e8e"
+  integrity sha512-BoMaddIEJ6B4QVMSDu9IkVImlGOSGA1I2BQyOZHeLQ6qVOJLcLKn97+fL6dGbzWEiqDzfH4OkcveULmeq2MHFQ==
+  dependencies:
+    JSONStream "^1.0.4"
+    is-text-path "^1.0.0"
+    lodash "^4.2.1"
+    meow "^4.0.0"
+    split2 "^2.0.0"
+    through2 "^2.0.0"
+    trim-off-newlines "^1.0.0"
+
+convert-source-map@^1.1.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.6.0.tgz#51b537a8c43e0f04dec1993bffcdd504e758ac20"
+  integrity sha512-eFu7XigvxdZ1ETfbgPBohgyQ/Z++C0eEhTor0qRwBw9unw+L0/6V8wkSuGgzdThkiS5lSpdptOQPD8Ak40a+7A==
+  dependencies:
+    safe-buffer "~5.1.1"
+
+cookie@0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
+  integrity sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=
+
+copy-concurrently@^1.0.0:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/copy-concurrently/-/copy-concurrently-1.0.5.tgz#92297398cae34937fcafd6ec8139c18051f0b5e0"
+  integrity sha512-f2domd9fsVDFtaFcbaRZuYXwtdmnzqbADSwhSWYxYB/Q8zsdUUFMXVRwXGDMWmbEzAn1kdRrtI1T/KTFOL4X2A==
+  dependencies:
+    aproba "^1.1.1"
+    fs-write-stream-atomic "^1.0.8"
+    iferr "^0.1.5"
+    mkdirp "^0.5.1"
+    rimraf "^2.5.4"
+    run-queue "^1.0.0"
+
+copy-descriptor@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
+  integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
+
+core-js@^2.2.0, core-js@^2.4.0, core-js@^2.5.7:
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.1.tgz#87416ae817de957a3f249b3b5ca475d4aaed6042"
+  integrity sha512-L72mmmEayPJBejKIWe2pYtGis5r0tQ5NaJekdhyXgeMQTpJoBsH0NL4ElY2LfSoV15xeQWKQ+XTTOZdyero5Xg==
+
+core-js@~2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.3.0.tgz#fab83fbb0b2d8dc85fa636c4b9d34c75420c6d65"
+  integrity sha1-+rg/uwstjchfpjbEudNMdUIMbWU=
+
+core-util-is@1.0.2, core-util-is@~1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
+  integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
+
+corser@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/corser/-/corser-2.0.1.tgz#8eda252ecaab5840dcd975ceb90d9370c819ff87"
+  integrity sha1-jtolLsqrWEDc2XXOuQ2TcMgZ/4c=
+
+cosmiconfig@5.0.6:
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-5.0.6.tgz#dca6cf680a0bd03589aff684700858c81abeeb39"
+  integrity sha512-6DWfizHriCrFWURP1/qyhsiFvYdlJzbCzmtFWh744+KyWsJo5+kPzUZZaMRSSItoYc0pxFX7gEO7ZC1/gN/7AQ==
+  dependencies:
+    is-directory "^0.3.1"
+    js-yaml "^3.9.0"
+    parse-json "^4.0.0"
+
+create-ecdh@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/create-ecdh/-/create-ecdh-4.0.3.tgz#c9111b6f33045c4697f144787f9254cdc77c45ff"
+  integrity sha512-GbEHQPMOswGpKXM9kCWVrremUcBmjteUaQ01T9rkKCPDXfUHX0IoP9LpHYo2NPFampa4e+/pFDc3jQdxrxQLaw==
+  dependencies:
+    bn.js "^4.1.0"
+    elliptic "^6.0.0"
+
+create-hash@^1.1.0, create-hash@^1.1.2:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/create-hash/-/create-hash-1.2.0.tgz#889078af11a63756bcfb59bd221996be3a9ef196"
+  integrity sha512-z00bCGNHDG8mHAkP7CtT1qVu+bFQUPjYq/4Iv3C3kWjTFV10zIjfSoeqXo9Asws8gwSHDGj/hl2u4OGIjapeCg==
+  dependencies:
+    cipher-base "^1.0.1"
+    inherits "^2.0.1"
+    md5.js "^1.3.4"
+    ripemd160 "^2.0.1"
+    sha.js "^2.4.0"
+
+create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/create-hmac/-/create-hmac-1.1.7.tgz#69170c78b3ab957147b2b8b04572e47ead2243ff"
+  integrity sha512-MJG9liiZ+ogc4TzUwuvbER1JRdgvUFSB5+VR/g5h82fGaIRWMWddtKBHi7/sVhfjQZ6SehlyhvQYrcYkaUIpLg==
+  dependencies:
+    cipher-base "^1.0.3"
+    create-hash "^1.1.0"
+    inherits "^2.0.1"
+    ripemd160 "^2.0.0"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
+cross-spawn@^5.0.1:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
+  integrity sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=
+  dependencies:
+    lru-cache "^4.0.1"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
+cross-spawn@^6.0.0, cross-spawn@^6.0.5:
+  version "6.0.5"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
+  integrity sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==
+  dependencies:
+    nice-try "^1.0.4"
+    path-key "^2.0.1"
+    semver "^5.5.0"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
+crypto-browserify@^3.11.0:
+  version "3.12.0"
+  resolved "https://registry.yarnpkg.com/crypto-browserify/-/crypto-browserify-3.12.0.tgz#396cf9f3137f03e4b8e532c58f698254e00f80ec"
+  integrity sha512-fz4spIh+znjO2VjL+IdhEpRJ3YN6sMzITSBijk6FK2UvTqruSQW+/cCZTSNsMiZNvUeq0CqurF+dAbyiGOY6Wg==
+  dependencies:
+    browserify-cipher "^1.0.0"
+    browserify-sign "^4.0.0"
+    create-ecdh "^4.0.0"
+    create-hash "^1.1.0"
+    create-hmac "^1.1.0"
+    diffie-hellman "^5.0.0"
+    inherits "^2.0.1"
+    pbkdf2 "^3.0.3"
+    public-encrypt "^4.0.0"
+    randombytes "^2.0.0"
+    randomfill "^1.0.3"
+
+css@~2.2.1:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/css/-/css-2.2.4.tgz#c646755c73971f2bba6a601e2cf2fd71b1298929"
+  integrity sha512-oUnjmWpy0niI3x/mPL8dVEI1l7MnG3+HHyRPHf+YFSbK+svOhXpmSOcDURUh2aOCgl2grzrOPt1nHLuCVFULLw==
+  dependencies:
+    inherits "^2.0.3"
+    source-map "^0.6.1"
+    source-map-resolve "^0.5.2"
+    urix "^0.1.0"
+
+currently-unhandled@^0.4.1:
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"
+  integrity sha1-mI3zP+qxke95mmE2nddsF635V+o=
+  dependencies:
+    array-find-index "^1.0.1"
+
+custom-event@~1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/custom-event/-/custom-event-1.0.1.tgz#5d02a46850adf1b4a317946a3928fccb5bfd0425"
+  integrity sha1-XQKkaFCt8bSjF5RqOSj8y1v9BCU=
+
+cyclist@~0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/cyclist/-/cyclist-0.2.2.tgz#1b33792e11e914a2fd6d6ed6447464444e5fa640"
+  integrity sha1-GzN5LhHpFKL9bW7WRHRkRE5fpkA=
+
+cz-conventional-changelog@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/cz-conventional-changelog/-/cz-conventional-changelog-2.0.0.tgz#55a979afdfe95e7024879d2a0f5924630170b533"
+  integrity sha1-Val5r9/pXnAkh50qD1kkYwFwtTM=
+  dependencies:
+    conventional-commit-types "^2.0.0"
+    lodash.map "^4.5.1"
+    longest "^1.0.1"
+    pad-right "^0.2.2"
+    right-pad "^1.0.1"
+    word-wrap "^1.0.3"
+
+cz-conventional-changelog@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/cz-conventional-changelog/-/cz-conventional-changelog-2.1.0.tgz#2f4bc7390e3244e4df293e6ba351e4c740a7c764"
+  integrity sha1-L0vHOQ4yROTfKT5ro1Hkx0Cnx2Q=
+  dependencies:
+    conventional-commit-types "^2.0.0"
+    lodash.map "^4.5.1"
+    longest "^1.0.1"
+    right-pad "^1.0.1"
+    word-wrap "^1.0.3"
+
+dargs@^4.0.1:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/dargs/-/dargs-4.1.0.tgz#03a9dbb4b5c2f139bf14ae53f0b8a2a6a86f4e17"
+  integrity sha1-A6nbtLXC8Tm/FK5T8LiipqhvThc=
+  dependencies:
+    number-is-nan "^1.0.0"
+
+dashdash@^1.12.0:
+  version "1.14.1"
+  resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
+  integrity sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=
+  dependencies:
+    assert-plus "^1.0.0"
+
+data-uri-to-buffer@1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/data-uri-to-buffer/-/data-uri-to-buffer-1.2.0.tgz#77163ea9c20d8641b4707e8f18abdf9a78f34835"
+  integrity sha512-vKQ9DTQPN1FLYiiEEOQ6IBGFqvjCa5rSK3cWMy/Nespm5d/x3dGFT9UBZnkLxCwua/IXBi2TYnwTEpsOvhC4UQ==
+
+date-fns@^1.27.2:
+  version "1.30.1"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.30.1.tgz#2e71bf0b119153dbb4cc4e88d9ea5acfb50dc05c"
+  integrity sha512-hBSVCvSmWC+QypYObzwGOd9wqdDpOt+0wl0KbU+R+uuZBS1jN8VsD1ss3irQDknRj5NvxiTF6oj/nDRnN/UQNw==
+
+date-format@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/date-format/-/date-format-1.2.0.tgz#615e828e233dd1ab9bb9ae0950e0ceccfa6ecad8"
+  integrity sha1-YV6CjiM90aubua4JUODOzPpuytg=
+
+date-now@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
+  integrity sha1-6vQ5/U1ISK105cx9vvIAZyueNFs=
+
+dateformat@^1.0.6:
+  version "1.0.12"
+  resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-1.0.12.tgz#9f124b67594c937ff706932e4a642cca8dbbfee9"
+  integrity sha1-nxJLZ1lMk3/3BpMuSmQsyo27/uk=
+  dependencies:
+    get-stdin "^4.0.1"
+    meow "^3.3.0"
+
+dateformat@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
+  integrity sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==
+
+de-indent@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/de-indent/-/de-indent-1.0.2.tgz#b2038e846dc33baa5796128d0804b455b8c1e21d"
+  integrity sha1-sgOOhG3DO6pXlhKNCAS0VbjB4h0=
+
+debug@2, debug@2.6.9, debug@^2.1.2, debug@^2.2.0, debug@^2.3.3, debug@^2.6.8:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
+  integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
+  dependencies:
+    ms "2.0.0"
+
+debug@2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
+  integrity sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=
+  dependencies:
+    ms "0.7.1"
+
+debug@4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.0.tgz#373687bffa678b38b1cd91f861b63850035ddc87"
+  integrity sha512-heNPJUJIqC+xB6ayLAMHaIrmN9HKa7aQO8MGqKpvCA+uJYVcvR6l5kgdrhRuwPFHU7P5/A1w0BjByPHwpfTDKg==
+  dependencies:
+    ms "^2.1.1"
+
+debug@^3.1.0:
+  version "3.2.6"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
+  integrity sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==
+  dependencies:
+    ms "^2.1.1"
+
+debug@^3.1.1:
+  version "3.2.7"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.7.tgz#72580b7e9145fb39b6676f9c5e5fb100b934179a"
+  integrity sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==
+  dependencies:
+    ms "^2.1.1"
+
+debug@^4.0.1, debug@^4.1.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
+  dependencies:
+    ms "^2.1.1"
+
+debug@~3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
+  dependencies:
+    ms "2.0.0"
+
+decamelize-keys@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/decamelize-keys/-/decamelize-keys-1.1.0.tgz#d171a87933252807eb3cb61dc1c1445d078df2d9"
+  integrity sha1-0XGoeTMlKAfrPLYdwcFEXQeN8tk=
+  dependencies:
+    decamelize "^1.1.0"
+    map-obj "^1.0.0"
+
+decamelize@^1.1.0, decamelize@^1.1.2:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
+  integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
+
+decode-uri-component@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
+  integrity sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=
+
+dedent@0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/dedent/-/dedent-0.6.0.tgz#0e6da8f0ce52838ef5cec5c8f9396b0c1b64a3cb"
+  integrity sha1-Dm2o8M5Sg471zsXI+TlrDBtko8s=
+
+dedent@^0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/dedent/-/dedent-0.7.0.tgz#2495ddbaf6eb874abb0e1be9df22d2e5a544326c"
+  integrity sha1-JJXduvbrh0q7Dhvp3yLS5aVEMmw=
+
+deep-eql@0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/deep-eql/-/deep-eql-0.1.3.tgz#ef558acab8de25206cd713906d74e56930eb69f2"
+  integrity sha1-71WKyrjeJSBs1xOQbXTlaTDrafI=
+  dependencies:
+    type-detect "0.1.1"
+
+deep-extend@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.6.0.tgz#c4fa7c95404a17a9c3e8ca7e1537312b736330ac"
+  integrity sha512-LOHxIOaPYdHlJRtCQfDIVZtfw/ufM8+rVj649RIHzcm/vGwQRXFt6OPqIFWsm2XEMrNIEtWR64sY1LEKD2vAOA==
+
+deep-is@^0.1.3, deep-is@~0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
+  integrity sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=
+
+define-properties@^1.1.2:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.3.tgz#cf88da6cbee26fe6db7094f61d870cbd84cee9f1"
+  integrity sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==
+  dependencies:
+    object-keys "^1.0.12"
+
+define-property@^0.2.5:
+  version "0.2.5"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-0.2.5.tgz#c35b1ef918ec3c990f9a5bc57be04aacec5c8116"
+  integrity sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=
+  dependencies:
+    is-descriptor "^0.1.0"
+
+define-property@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-1.0.0.tgz#769ebaaf3f4a63aad3af9e8d304c9bbe79bfb0e6"
+  integrity sha1-dp66rz9KY6rTr56NMEybvnm/sOY=
+  dependencies:
+    is-descriptor "^1.0.0"
+
+define-property@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/define-property/-/define-property-2.0.2.tgz#d459689e8d654ba77e02a817f8710d702cb16e9d"
+  integrity sha512-jwK2UV4cnPpbcG7+VRARKTZPUWowwXA8bzH5NP6ud0oeAxyYPuGZUAC7hMugpCdz4BeSZl2Dl9k66CHJ/46ZYQ==
+  dependencies:
+    is-descriptor "^1.0.2"
+    isobject "^3.0.1"
+
+degenerator@~1.0.2:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/degenerator/-/degenerator-1.0.4.tgz#fcf490a37ece266464d9cc431ab98c5819ced095"
+  integrity sha1-/PSQo37OJmRk2cxDGrmMWBnO0JU=
+  dependencies:
+    ast-types "0.x.x"
+    escodegen "1.x.x"
+    esprima "3.x.x"
+
+del@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/del/-/del-3.0.0.tgz#53ecf699ffcbcb39637691ab13baf160819766e5"
+  integrity sha1-U+z2mf/LyzljdpGrE7rxYIGXZuU=
+  dependencies:
+    globby "^6.1.0"
+    is-path-cwd "^1.0.0"
+    is-path-in-cwd "^1.0.0"
+    p-map "^1.1.1"
+    pify "^3.0.0"
+    rimraf "^2.2.8"
+
+delayed-stream@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
+  integrity sha1-3zrhmayt+31ECqrgsp4icrJOxhk=
+
+delegates@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
+  integrity sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=
+
+depd@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
+  integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
+
+des.js@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/des.js/-/des.js-1.0.0.tgz#c074d2e2aa6a8a9a07dbd61f9a15c2cd83ec8ecc"
+  integrity sha1-wHTS4qpqipoH29YfmhXCzYPsjsw=
+  dependencies:
+    inherits "^2.0.1"
+    minimalistic-assert "^1.0.0"
+
+detect-file@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/detect-file/-/detect-file-0.1.0.tgz#4935dedfd9488648e006b0129566e9386711ea63"
+  integrity sha1-STXe39lIhkjgBrASlWbpOGcR6mM=
+  dependencies:
+    fs-exists-sync "^0.1.0"
+
+detect-indent@4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/detect-indent/-/detect-indent-4.0.0.tgz#f76d064352cdf43a1cb6ce619c4ee3a9475de208"
+  integrity sha1-920GQ1LN9Docts5hnE7jqUdd4gg=
+  dependencies:
+    repeating "^2.0.0"
+
+detect-libc@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
+  integrity sha1-+hN8S9aY7fVc1c0CrFWfkaTEups=
+
+di@^0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/di/-/di-0.0.1.tgz#806649326ceaa7caa3306d75d985ea2748ba913c"
+  integrity sha1-gGZJMmzqp8qjMG112YXqJ0i6kTw=
+
+diff@1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-1.4.0.tgz#7f28d2eb9ee7b15a97efd89ce63dcfdaa3ccbabf"
+  integrity sha1-fyjS657nsVqX79ic5j3P2qPMur8=
+
+diffie-hellman@^5.0.0:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.3.tgz#40e8ee98f55a2149607146921c63e1ae5f3d2875"
+  integrity sha512-kqag/Nl+f3GwyK25fhUMYj81BUOrZ9IuJsjIcDE5icNM9FJHAVm3VcUDxdLPoQtTuUylWm6ZIknYJwwaPxsUzg==
+  dependencies:
+    bn.js "^4.1.0"
+    miller-rabin "^4.0.0"
+    randombytes "^2.0.0"
+
+doctrine@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.1.0.tgz#5cd01fc101621b42c4cd7f5d1a66243716d3f39d"
+  integrity sha512-35mSku4ZXK0vfCuHEDAwt55dg2jNajHZ1odvF+8SSr82EsZY4QmXfuWso8oEd8zRhVObSN18aM0CjSdoBX7zIw==
+  dependencies:
+    esutils "^2.0.2"
+
+dom-serialize@^2.2.0:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/dom-serialize/-/dom-serialize-2.2.1.tgz#562ae8999f44be5ea3076f5419dcd59eb43ac95b"
+  integrity sha1-ViromZ9Evl6jB29UGdzVnrQ6yVs=
+  dependencies:
+    custom-event "~1.0.0"
+    ent "~2.2.0"
+    extend "^3.0.0"
+    void-elements "^2.0.0"
+
+domain-browser@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/domain-browser/-/domain-browser-1.2.0.tgz#3d31f50191a6749dd1375a7f522e823d42e54eda"
+  integrity sha512-jnjyiM6eRyZl2H+W8Q/zLMA481hzi0eszAaBUzIVnmYVDBbnLxVNnfu1HgEBvCbL+71FrxMl3E6lpKH7Ge3OXA==
+
+dot-prop@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/dot-prop/-/dot-prop-3.0.0.tgz#1b708af094a49c9a0e7dbcad790aba539dac1177"
+  integrity sha1-G3CK8JSknJoOfbyteQq6U52sEXc=
+  dependencies:
+    is-obj "^1.0.0"
+
+duplexify@^3.4.2, duplexify@^3.6.0:
+  version "3.6.1"
+  resolved "https://registry.yarnpkg.com/duplexify/-/duplexify-3.6.1.tgz#b1a7a29c4abfd639585efaecce80d666b1e34125"
+  integrity sha512-vM58DwdnKmty+FSPzT14K9JXb90H+j5emaR4KYbr2KTIz00WHGbWOe5ghQTx233ZCLZtrGDALzKwcjEtSt35mA==
+  dependencies:
+    end-of-stream "^1.0.0"
+    inherits "^2.0.1"
+    readable-stream "^2.0.0"
+    stream-shift "^1.0.0"
+
+ecc-jsbn@~0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz#3a83a904e54353287874c564b7549386849a98c9"
+  integrity sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=
+  dependencies:
+    jsbn "~0.1.0"
+    safer-buffer "^2.1.0"
+
+ecstatic@^3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-3.3.2.tgz#6d1dd49814d00594682c652adb66076a69d46c48"
+  integrity sha512-fLf9l1hnwrHI2xn9mEDT7KIi22UDqA2jaCwyCbSUJh9a1V+LEUSL/JO/6TIz/QyuBURWUHrFL5Kg2TtO1bkkog==
+  dependencies:
+    he "^1.1.1"
+    mime "^1.6.0"
+    minimist "^1.1.0"
+    url-join "^2.0.5"
+
+ee-first@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
+  integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
+
+ejs@2.5.7:
+  version "2.5.7"
+  resolved "https://registry.yarnpkg.com/ejs/-/ejs-2.5.7.tgz#cc872c168880ae3c7189762fd5ffc00896c9518a"
+  integrity sha1-zIcsFoiArjxxiXYv1f/ACJbJUYo=
+
+electron-to-chromium@^1.3.96:
+  version "1.3.98"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.98.tgz#f200bdac84b1110d7d9904f34f4fc6d5573a8a9c"
+  integrity sha512-WIZdNuvE3dFr6kkPgv4d/cfswNZD6XbeLBM8baOIQTsnbf4xWrVEaLvp7oNnbnMWWXDqq7Tbv+H5JfciLTJm4Q==
+
+elegant-spinner@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/elegant-spinner/-/elegant-spinner-1.0.1.tgz#db043521c95d7e303fd8f345bedc3349cfb0729e"
+  integrity sha1-2wQ1IcldfjA/2PNFvtwzSc+wcp4=
+
+elliptic@^6.0.0:
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz#da37cebd31e79a1367e941b592ed1fbebd58abbb"
+  integrity sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==
+  dependencies:
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
+    hash.js "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
+
+emojis-list@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/emojis-list/-/emojis-list-2.1.0.tgz#4daa4d9db00f9819880c79fa457ae5b09a1fd389"
+  integrity sha1-TapNnbAPmBmIDHn6RXrlsJof04k=
+
+encodeurl@~1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-1.0.2.tgz#ad3ff4c86ec2d029322f5a02c3a9a606c95b3f59"
+  integrity sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=
+
+encoding@^0.1.11:
+  version "0.1.12"
+  resolved "https://registry.yarnpkg.com/encoding/-/encoding-0.1.12.tgz#538b66f3ee62cd1ab51ec323829d1f9480c74beb"
+  integrity sha1-U4tm8+5izRq1HsMjgp0flIDHS+s=
+  dependencies:
+    iconv-lite "~0.4.13"
+
+end-of-stream@^1.0.0, end-of-stream@^1.1.0:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/end-of-stream/-/end-of-stream-1.4.1.tgz#ed29634d19baba463b6ce6b80a37213eab71ec43"
+  integrity sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==
+  dependencies:
+    once "^1.4.0"
+
+engine.io-client@~3.2.0:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/engine.io-client/-/engine.io-client-3.2.1.tgz#6f54c0475de487158a1a7c77d10178708b6add36"
+  integrity sha512-y5AbkytWeM4jQr7m/koQLc5AxpRKC1hEVUb/s1FUAWEJq5AzJJ4NLvzuKPuxtDi5Mq755WuDvZ6Iv2rXj4PTzw==
+  dependencies:
+    component-emitter "1.2.1"
+    component-inherit "0.0.3"
+    debug "~3.1.0"
+    engine.io-parser "~2.1.1"
+    has-cors "1.1.0"
+    indexof "0.0.1"
+    parseqs "0.0.5"
+    parseuri "0.0.5"
+    ws "~3.3.1"
+    xmlhttprequest-ssl "~1.5.4"
+    yeast "0.1.2"
+
+engine.io-parser@~2.1.0, engine.io-parser@~2.1.1:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/engine.io-parser/-/engine.io-parser-2.1.3.tgz#757ab970fbf2dfb32c7b74b033216d5739ef79a6"
+  integrity sha512-6HXPre2O4Houl7c4g7Ic/XzPnHBvaEmN90vtRO9uLmwtRqQmTOw0QMevL1TOfL2Cpu1VzsaTmMotQgMdkzGkVA==
+  dependencies:
+    after "0.8.2"
+    arraybuffer.slice "~0.0.7"
+    base64-arraybuffer "0.1.5"
+    blob "0.0.5"
+    has-binary2 "~1.0.2"
+
+engine.io@~3.2.0:
+  version "3.2.1"
+  resolved "https://registry.yarnpkg.com/engine.io/-/engine.io-3.2.1.tgz#b60281c35484a70ee0351ea0ebff83ec8c9522a2"
+  integrity sha512-+VlKzHzMhaU+GsCIg4AoXF1UdDFjHHwMmMKqMJNDNLlUlejz58FCy4LBqB2YVJskHGYl06BatYWKP2TVdVXE5w==
+  dependencies:
+    accepts "~1.3.4"
+    base64id "1.0.0"
+    cookie "0.3.1"
+    debug "~3.1.0"
+    engine.io-parser "~2.1.0"
+    ws "~3.3.1"
+
+enhanced-resolve@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-4.1.0.tgz#41c7e0bfdfe74ac1ffe1e57ad6a5c6c9f3742a7f"
+  integrity sha512-F/7vkyTtyc/llOIn8oWclcB25KdRaiPBpZYDgJHgh/UHtpgT2p2eldQgtQnLtUvfMKPKxbRaQM/hHkvLHt1Vng==
+  dependencies:
+    graceful-fs "^4.1.2"
+    memory-fs "^0.4.0"
+    tapable "^1.0.0"
+
+ent@~2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/ent/-/ent-2.2.0.tgz#e964219325a21d05f44466a2f686ed6ce5f5dd1d"
+  integrity sha1-6WQhkyWiHQX0RGai9obtbOX13R0=
+
+errno@^0.1.3, errno@~0.1.7:
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.7.tgz#4684d71779ad39af177e3f007996f7c67c852618"
+  integrity sha512-MfrRBDWzIWifgq6tJj60gkAwtLNb6sQPlcFrSOflcP1aFmmruKQ2wRnze/8V6kgyz7H3FF8Npzv78mZ7XLLflg==
+  dependencies:
+    prr "~1.0.1"
+
+error-ex@^1.2.0, error-ex@^1.3.1:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.2.tgz#b4ac40648107fdcdcfae242f428bea8a14d4f1bf"
+  integrity sha512-7dFHNmqeFSEt2ZBsCriorKnn3Z2pj+fd9kmI6QoWw4//DL+icEBfc0U7qJCisqrTsKTjw4fNFy2pW9OqStD84g==
+  dependencies:
+    is-arrayish "^0.2.1"
+
+es-abstract@^1.5.1:
+  version "1.13.0"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.13.0.tgz#ac86145fdd5099d8dd49558ccba2eaf9b88e24e9"
+  integrity sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==
+  dependencies:
+    es-to-primitive "^1.2.0"
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    is-callable "^1.1.4"
+    is-regex "^1.0.4"
+    object-keys "^1.0.12"
+
+es-to-primitive@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.2.0.tgz#edf72478033456e8dda8ef09e00ad9650707f377"
+  integrity sha512-qZryBOJjV//LaxLTV6UC//WewneB3LcXOL9NP++ozKVXsIIIpm/2c13UDiD9Jp2eThsecw9m3jPqDwTyobcdbg==
+  dependencies:
+    is-callable "^1.1.4"
+    is-date-object "^1.0.1"
+    is-symbol "^1.0.2"
+
+es6-promise@^4.0.3, es6-promise@^4.1.0:
+  version "4.2.5"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.5.tgz#da6d0d5692efb461e082c14817fe2427d8f5d054"
+  integrity sha512-n6wvpdE43VFtJq+lUDYDBFUwV8TZbuGXLV4D6wKafg13ldznKsyEvatubnmUe31zcvelSzOHF+XbaT+Bl9ObDg==
+
+es6-promise@~3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-3.0.2.tgz#010d5858423a5f118979665f46486a95c6ee2bb6"
+  integrity sha1-AQ1YWEI6XxGJeWZfRkhqlcbuK7Y=
+
+es6-promisify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
+  integrity sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=
+  dependencies:
+    es6-promise "^4.0.3"
+
+escape-html@~1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
+  integrity sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg=
+
+escape-string-regexp@1.0.5, escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.4, escape-string-regexp@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
+  integrity sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=
+
+escodegen@1.8.x:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.8.1.tgz#5a5b53af4693110bebb0867aa3430dd3b70a1018"
+  integrity sha1-WltTr0aTEQvrsIZ6o0MN07cKEBg=
+  dependencies:
+    esprima "^2.7.1"
+    estraverse "^1.9.1"
+    esutils "^2.0.2"
+    optionator "^0.8.1"
+  optionalDependencies:
+    source-map "~0.2.0"
+
+escodegen@1.x.x, escodegen@^1.8.1:
+  version "1.11.0"
+  resolved "https://registry.yarnpkg.com/escodegen/-/escodegen-1.11.0.tgz#b27a9389481d5bfd5bec76f7bb1eb3f8f4556589"
+  integrity sha512-IeMV45ReixHS53K/OmfKAIztN/igDHzTJUhZM3k1jMhIZWjk45SMwAtBsEXiJp3vSPmTcu6CXn7mDvFHRN66fw==
+  dependencies:
+    esprima "^3.1.3"
+    estraverse "^4.2.0"
+    esutils "^2.0.2"
+    optionator "^0.8.1"
+  optionalDependencies:
+    source-map "~0.6.1"
+
+eslint-plugin-flowtype@^2.34.0:
+  version "2.50.3"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-flowtype/-/eslint-plugin-flowtype-2.50.3.tgz#61379d6dce1d010370acd6681740fd913d68175f"
+  integrity sha512-X+AoKVOr7Re0ko/yEXyM5SSZ0tazc6ffdIOocp2fFUlWoDt7DV0Bz99mngOkAFLOAWjqRA5jPwqUCbrx13XoxQ==
+  dependencies:
+    lodash "^4.17.10"
+
+eslint-plugin-jasmine@^2.8.4:
+  version "2.10.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-jasmine/-/eslint-plugin-jasmine-2.10.1.tgz#5733b709e751f4bc40e31e1c16989bd2cdfbec97"
+  integrity sha1-VzO3CedR9LxA4x4cFpib0s377Jc=
+
+eslint-scope@3.7.1:
+  version "3.7.1"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-3.7.1.tgz#3d63c3edfda02e06e01a452ad88caacc7cdcb6e8"
+  integrity sha1-PWPD7f2gLgbgGkUq2IyqzHzctug=
+  dependencies:
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
+eslint-scope@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-4.0.0.tgz#50bf3071e9338bcdc43331794a0cb533f0136172"
+  integrity sha512-1G6UTDi7Jc1ELFwnR58HV4fK9OQK4S6N985f166xqXxpjU6plxFISJa2Ba9KCQuFa8RCnj/lSFJbHo7UFDBnUA==
+  dependencies:
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
+eslint-utils@^1.3.1:
+  version "1.4.2"
+  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.4.2.tgz#166a5180ef6ab7eb462f162fd0e6f2463d7309ab"
+  integrity sha512-eAZS2sEUMlIeCjBeubdj45dmBHQwPHWyBcT1VSYB7o9x9WRRqKxyUoiXlRjyAwzN7YEzHJlYg0NmzDRWx6GP4Q==
+  dependencies:
+    eslint-visitor-keys "^1.0.0"
+
+eslint-visitor-keys@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
+  integrity sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==
+
+eslint@^5.7.0:
+  version "5.12.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-5.12.0.tgz#fab3b908f60c52671fb14e996a450b96c743c859"
+  integrity sha512-LntwyPxtOHrsJdcSwyQKVtHofPHdv+4+mFwEe91r2V13vqpM8yLr7b1sW+Oo/yheOPkWYsYlYJCkzlFAt8KV7g==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    ajv "^6.5.3"
+    chalk "^2.1.0"
+    cross-spawn "^6.0.5"
+    debug "^4.0.1"
+    doctrine "^2.1.0"
+    eslint-scope "^4.0.0"
+    eslint-utils "^1.3.1"
+    eslint-visitor-keys "^1.0.0"
+    espree "^5.0.0"
+    esquery "^1.0.1"
+    esutils "^2.0.2"
+    file-entry-cache "^2.0.0"
+    functional-red-black-tree "^1.0.1"
+    glob "^7.1.2"
+    globals "^11.7.0"
+    ignore "^4.0.6"
+    import-fresh "^3.0.0"
+    imurmurhash "^0.1.4"
+    inquirer "^6.1.0"
+    js-yaml "^3.12.0"
+    json-stable-stringify-without-jsonify "^1.0.1"
+    levn "^0.3.0"
+    lodash "^4.17.5"
+    minimatch "^3.0.4"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    optionator "^0.8.2"
+    path-is-inside "^1.0.2"
+    pluralize "^7.0.0"
+    progress "^2.0.0"
+    regexpp "^2.0.1"
+    semver "^5.5.1"
+    strip-ansi "^4.0.0"
+    strip-json-comments "^2.0.1"
+    table "^5.0.2"
+    text-table "^0.2.0"
+
+espree@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-5.0.0.tgz#fc7f984b62b36a0f543b13fb9cd7b9f4a7f5b65c"
+  integrity sha512-1MpUfwsdS9MMoN7ZXqAr9e9UKdVHDcvrJpyx7mm1WuQlx/ygErEQBzgi5Nh5qBHIoYweprhtMkTCb9GhcAIcsA==
+  dependencies:
+    acorn "^6.0.2"
+    acorn-jsx "^5.0.0"
+    eslint-visitor-keys "^1.0.0"
+
+esprima@2.7.x, esprima@^2.7.1:
+  version "2.7.3"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-2.7.3.tgz#96e3b70d5779f6ad49cd032673d1c312767ba581"
+  integrity sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE=
+
+esprima@3.x.x, esprima@^3.1.3:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
+  integrity sha1-/cpRzuYTOJXjyI1TXOSdv/YqRjM=
+
+esprima@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
+  integrity sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==
+
+esquery@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.1.tgz#406c51658b1f5991a5f9b62b1dc25b00e3e5c708"
+  integrity sha512-SmiyZ5zIWH9VM+SRUReLS5Q8a7GxtRdxEBVZpm98rJM7Sb+A9DVCndXfkeFUd3byderg+EbDkfnevfCwynWaNA==
+  dependencies:
+    estraverse "^4.0.0"
+
+esrecurse@^4.1.0:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.1.tgz#007a3b9fdbc2b3bb87e4879ea19c92fdbd3942cf"
+  integrity sha512-64RBB++fIOAXPw3P9cy89qfMlvZEXZkqqJkjqqXIvzP5ezRZjW+lPWjw35UX/3EhUPFYbg5ER4JYgDw4007/DQ==
+  dependencies:
+    estraverse "^4.1.0"
+
+estraverse@^1.9.1:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-1.9.3.tgz#af67f2dc922582415950926091a4005d29c9bb44"
+  integrity sha1-r2fy3JIlgkFZUJJgkaQAXSnJu0Q=
+
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
+  integrity sha1-De4/7TH81GlhjOc0IJn8GvoL2xM=
+
+estree-walker@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.2.1.tgz#bdafe8095383d8414d5dc2ecf4c9173b6db9412e"
+  integrity sha1-va/oCVOD2EFNXcLs9MkXO225QS4=
+
+estree-walker@^0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.5.2.tgz#d3850be7529c9580d815600b53126515e146dd39"
+  integrity sha512-XpCnW/AE10ws/kDAs37cngSkvgIR8aN3G0MS85m7dUpuK2EREo9VJ00uvw6Dg/hXEpfsE1I1TvJOJr+Z+TL+ig==
+
+esutils@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
+  integrity sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=
+
+eventemitter3@^4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
+  integrity sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw==
+
+events@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/events/-/events-1.1.1.tgz#9ebdb7635ad099c70dcc4c2a1f5004288e8bd924"
+  integrity sha1-nr23Y1rQmccNzEwqH1AEKI6L2SQ=
+
+evp_bytestokey@^1.0.0, evp_bytestokey@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/evp_bytestokey/-/evp_bytestokey-1.0.3.tgz#7fcbdb198dc71959432efe13842684e0525acb02"
+  integrity sha512-/f2Go4TognH/KvCISP7OUsHn85hT9nUkxxA9BEWxFn+Oj9o8ZNLm/40hdlgSLyuOimsrTKLUMEorQexp/aPQeA==
+  dependencies:
+    md5.js "^1.3.4"
+    safe-buffer "^5.1.1"
+
+execa@^0.8.0:
+  version "0.8.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-0.8.0.tgz#d8d76bbc1b55217ed190fd6dd49d3c774ecfc8da"
+  integrity sha1-2NdrvBtVIX7RkP1t1J08d07PyNo=
+  dependencies:
+    cross-spawn "^5.0.1"
+    get-stream "^3.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
+execa@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/execa/-/execa-1.0.0.tgz#c6236a5bb4df6d6f15e88e7f017798216749ddd8"
+  integrity sha512-adbxcyWV46qiHyvSp50TKt05tB4tK3HcmF7/nxfAdhnox83seTDbwnaqKO4sXRy7roHAIFqJP/Rw/AuEbX61LA==
+  dependencies:
+    cross-spawn "^6.0.0"
+    get-stream "^4.0.0"
+    is-stream "^1.1.0"
+    npm-run-path "^2.0.0"
+    p-finally "^1.0.0"
+    signal-exit "^3.0.0"
+    strip-eof "^1.0.0"
+
+exit-hook@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
+  integrity sha1-8FyiM7SMBdVP/wd2XfhQfpXAL/g=
+
+exit@^0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/exit/-/exit-0.1.2.tgz#0632638f8d877cc82107d30a0fff1a17cba1cd0c"
+  integrity sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=
+
+expand-braces@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/expand-braces/-/expand-braces-0.1.2.tgz#488b1d1d2451cb3d3a6b192cfc030f44c5855fea"
+  integrity sha1-SIsdHSRRyz06axks/AMPRMWFX+o=
+  dependencies:
+    array-slice "^0.2.3"
+    array-unique "^0.2.1"
+    braces "^0.1.2"
+
+expand-brackets@^0.1.4:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
+  integrity sha1-3wcoTjQqgHzXM6xa9yQR5YHRF3s=
+  dependencies:
+    is-posix-bracket "^0.1.0"
+
+expand-brackets@^2.1.4:
+  version "2.1.4"
+  resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-2.1.4.tgz#b77735e315ce30f6b6eff0f83b04151a22449622"
+  integrity sha1-t3c14xXOMPa27/D4OwQVGiJEliI=
+  dependencies:
+    debug "^2.3.3"
+    define-property "^0.2.5"
+    extend-shallow "^2.0.1"
+    posix-character-classes "^0.1.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
+expand-range@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/expand-range/-/expand-range-0.1.1.tgz#4cb8eda0993ca56fa4f41fc42f3cbb4ccadff044"
+  integrity sha1-TLjtoJk8pW+k9B/ELzy7TMrf8EQ=
+  dependencies:
+    is-number "^0.1.1"
+    repeat-string "^0.2.2"
+
+expand-range@^1.8.1:
+  version "1.8.2"
+  resolved "https://registry.yarnpkg.com/expand-range/-/expand-range-1.8.2.tgz#a299effd335fe2721ebae8e257ec79644fc85337"
+  integrity sha1-opnv/TNf4nIeuujiV+x5ZE/IUzc=
+  dependencies:
+    fill-range "^2.1.0"
+
+expand-tilde@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/expand-tilde/-/expand-tilde-1.2.2.tgz#0b81eba897e5a3d31d1c3d102f8f01441e559449"
+  integrity sha1-C4HrqJflo9MdHD0QL48BRB5VlEk=
+  dependencies:
+    os-homedir "^1.0.1"
+
+extend-shallow@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-2.0.1.tgz#51af7d614ad9a9f610ea1bafbb989d6b1c56890f"
+  integrity sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=
+  dependencies:
+    is-extendable "^0.1.0"
+
+extend-shallow@^3.0.0, extend-shallow@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-3.0.2.tgz#26a71aaf073b39fb2127172746131c2704028db8"
+  integrity sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=
+  dependencies:
+    assign-symbols "^1.0.0"
+    is-extendable "^1.0.1"
+
+extend@3, extend@^3.0.0, extend@~3.0.0, extend@~3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
+  integrity sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==
+
+external-editor@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-1.1.1.tgz#12d7b0db850f7ff7e7081baf4005700060c4600b"
+  integrity sha1-Etew24UPf/fnCBuvQAVwAGDEYAs=
+  dependencies:
+    extend "^3.0.0"
+    spawn-sync "^1.0.15"
+    tmp "^0.0.29"
+
+external-editor@^2.0.1:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-2.2.0.tgz#045511cfd8d133f3846673d1047c154e214ad3d5"
+  integrity sha512-bSn6gvGxKt+b7+6TKEv1ZycHleA7aHhRHyAqJyp5pbUFuYYNIzpZnQDk7AsYckyWdEnTeAnay0aCy2aV6iTk9A==
+  dependencies:
+    chardet "^0.4.0"
+    iconv-lite "^0.4.17"
+    tmp "^0.0.33"
+
+external-editor@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-3.0.3.tgz#5866db29a97826dbe4bf3afd24070ead9ea43a27"
+  integrity sha512-bn71H9+qWoOQKyZDo25mOMVpSmXROAsTJVVVYzrrtol3d4y+AsKjf4Iwl2Q+IuT0kFSQ1qo166UuIwqYq7mGnA==
+  dependencies:
+    chardet "^0.7.0"
+    iconv-lite "^0.4.24"
+    tmp "^0.0.33"
+
+extglob@^0.3.1:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/extglob/-/extglob-0.3.2.tgz#2e18ff3d2f49ab2765cec9023f011daa8d8349a1"
+  integrity sha1-Lhj/PS9JqydlzskCPwEdqo2DSaE=
+  dependencies:
+    is-extglob "^1.0.0"
+
+extglob@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/extglob/-/extglob-2.0.4.tgz#ad00fe4dc612a9232e8718711dc5cb5ab0285543"
+  integrity sha512-Nmb6QXkELsuBr24CJSkilo6UHHgbekK5UiZgfE6UHD3Eb27YC6oD+bhcT+tJ6cl8dmsgdQxnWlcry8ksBIBLpw==
+  dependencies:
+    array-unique "^0.3.2"
+    define-property "^1.0.0"
+    expand-brackets "^2.1.4"
+    extend-shallow "^2.0.1"
+    fragment-cache "^0.2.1"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
+extract-zip@^1.6.5, extract-zip@^1.6.6, extract-zip@^1.6.7:
+  version "1.6.7"
+  resolved "https://registry.yarnpkg.com/extract-zip/-/extract-zip-1.6.7.tgz#a840b4b8af6403264c8db57f4f1a74333ef81fe9"
+  integrity sha1-qEC0uK9kAyZMjbV/Txp0Mz74H+k=
+  dependencies:
+    concat-stream "1.6.2"
+    debug "2.6.9"
+    mkdirp "0.5.1"
+    yauzl "2.4.1"
+
+extsprintf@1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.3.0.tgz#96918440e3041a7a414f8c52e3c574eb3c3e1e05"
+  integrity sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=
+
+extsprintf@^1.2.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.4.0.tgz#e2689f8f356fad62cca65a3a91c5df5f9551692f"
+  integrity sha1-4mifjzVvrWLMplo6kcXfX5VRaS8=
+
+fast-deep-equal@^3.1.1:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
+  integrity sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==
+
+fast-json-stable-stringify@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz#874bf69c6f404c2b5d99c481341399fd55892633"
+  integrity sha512-lhd/wF+Lk98HZoTCtlVraHtfh5XYijIjalXck7saUtuanSDyLMxnHhSXEDJqHxD7msR8D0uCmqlkwjCV8xvwHw==
+
+fast-levenshtein@~2.0.4:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
+  integrity sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=
+
+fd-slicer@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/fd-slicer/-/fd-slicer-1.0.1.tgz#8b5bcbd9ec327c5041bf9ab023fd6750f1177e65"
+  integrity sha1-i1vL2ewyfFBBv5qwI/1nUPEXfmU=
+  dependencies:
+    pend "~1.2.0"
+
+figgy-pudding@^3.5.1:
+  version "3.5.2"
+  resolved "https://registry.yarnpkg.com/figgy-pudding/-/figgy-pudding-3.5.2.tgz#b4eee8148abb01dcf1d1ac34367d59e12fa61d6e"
+  integrity sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw==
+
+figures@^1.3.5, figures@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
+  integrity sha1-y+Hjr/zxzUS4DK3+0o3Hk6lwHS4=
+  dependencies:
+    escape-string-regexp "^1.0.5"
+    object-assign "^4.1.0"
+
+figures@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/figures/-/figures-2.0.0.tgz#3ab1a2d2a62c8bfb431a0c94cb797a2fce27c962"
+  integrity sha1-OrGi0qYsi/tDGgyUy3l6L84nyWI=
+  dependencies:
+    escape-string-regexp "^1.0.5"
+
+file-entry-cache@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-2.0.0.tgz#c392990c3e684783d838b8c84a45d8a048458361"
+  integrity sha1-w5KZDD5oR4PYOLjISkXYoEhFg2E=
+  dependencies:
+    flat-cache "^1.2.1"
+    object-assign "^4.0.1"
+
+file-loader@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/file-loader/-/file-loader-3.0.1.tgz#f8e0ba0b599918b51adfe45d66d1e771ad560faa"
+  integrity sha512-4sNIOXgtH/9WZq4NvlfU3Opn5ynUsqBwSLyM+I7UOwdGigTBYfVVQEwe/msZNX/j4pCJTIM14Fsw66Svo1oVrw==
+  dependencies:
+    loader-utils "^1.0.2"
+    schema-utils "^1.0.0"
+
+file-uri-to-path@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz#553a7b8446ff6f684359c445f1e37a05dacc33dd"
+  integrity sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==
+
+filename-regex@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
+  integrity sha1-wcS5vuPglyXdsQa3XB4wH+LxiyY=
+
+fill-range@^2.1.0:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-2.2.4.tgz#eb1e773abb056dcd8df2bfdf6af59b8b3a936565"
+  integrity sha512-cnrcCbj01+j2gTG921VZPnHbjmdAf8oQV/iGeV2kZxGSyfYjjTyY79ErsK1WJWMpw6DaApEX72binqJE+/d+5Q==
+  dependencies:
+    is-number "^2.1.0"
+    isobject "^2.0.0"
+    randomatic "^3.0.0"
+    repeat-element "^1.1.2"
+    repeat-string "^1.5.2"
+
+fill-range@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-4.0.0.tgz#d544811d428f98eb06a63dc402d2403c328c38f7"
+  integrity sha1-1USBHUKPmOsGpj3EAtJAPDKMOPc=
+  dependencies:
+    extend-shallow "^2.0.1"
+    is-number "^3.0.0"
+    repeat-string "^1.6.1"
+    to-regex-range "^2.1.0"
+
+finalhandler@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-1.1.0.tgz#ce0b6855b45853e791b2fcc680046d88253dd7f5"
+  integrity sha1-zgtoVbRYU+eRsvzGgARtiCU91/U=
+  dependencies:
+    debug "2.6.9"
+    encodeurl "~1.0.1"
+    escape-html "~1.0.3"
+    on-finished "~2.3.0"
+    parseurl "~1.3.2"
+    statuses "~1.3.1"
+    unpipe "~1.0.0"
+
+find-cache-dir@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-1.0.0.tgz#9288e3e9e3cc3748717d39eade17cf71fc30ee6f"
+  integrity sha1-kojj6ePMN0hxfTnq3hfPcfww7m8=
+  dependencies:
+    commondir "^1.0.1"
+    make-dir "^1.0.0"
+    pkg-dir "^2.0.0"
+
+find-cache-dir@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/find-cache-dir/-/find-cache-dir-2.0.0.tgz#4c1faed59f45184530fb9d7fa123a4d04a98472d"
+  integrity sha512-LDUY6V1Xs5eFskUVYtIwatojt6+9xC9Chnlk/jYOOvn3FAFfSaWddxahDGyNHh0b2dMXa6YW2m0tk8TdVaXHlA==
+  dependencies:
+    commondir "^1.0.1"
+    make-dir "^1.0.0"
+    pkg-dir "^3.0.0"
+
+find-node-modules@1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/find-node-modules/-/find-node-modules-1.0.4.tgz#b6deb3cccb699c87037677bcede2c5f5862b2550"
+  integrity sha1-tt6zzMtpnIcDdne87eLF9YYrJVA=
+  dependencies:
+    findup-sync "0.4.2"
+    merge "^1.2.0"
+
+find-parent-dir@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/find-parent-dir/-/find-parent-dir-0.3.0.tgz#33c44b429ab2b2f0646299c5f9f718f376ff8d54"
+  integrity sha1-M8RLQpqysvBkYpnF+fcY83b/jVQ=
+
+find-root@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/find-root/-/find-root-1.0.0.tgz#962ff211aab25c6520feeeb8d6287f8f6e95807a"
+  integrity sha1-li/yEaqyXGUg/u641ih/j26VgHo=
+
+find-up@^1.0.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
+  integrity sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=
+  dependencies:
+    path-exists "^2.0.0"
+    pinkie-promise "^2.0.0"
+
+find-up@^2.0.0, find-up@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-2.1.0.tgz#45d1b7e506c717ddd482775a2b77920a3c0c57a7"
+  integrity sha1-RdG35QbHF93UgndaK3eSCjwMV6c=
+  dependencies:
+    locate-path "^2.0.0"
+
+find-up@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-3.0.0.tgz#49169f1d7993430646da61ecc5ae355c21c97b73"
+  integrity sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==
+  dependencies:
+    locate-path "^3.0.0"
+
+findup-sync@0.4.2:
+  version "0.4.2"
+  resolved "https://registry.yarnpkg.com/findup-sync/-/findup-sync-0.4.2.tgz#a8117d0f73124f5a4546839579fe52d7129fb5e5"
+  integrity sha1-qBF9D3MST1pFRoOVef5S1xKfteU=
+  dependencies:
+    detect-file "^0.1.0"
+    is-glob "^2.0.1"
+    micromatch "^2.3.7"
+    resolve-dir "^0.1.0"
+
+flat-cache@^1.2.1:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-1.3.4.tgz#2c2ef77525cc2929007dfffa1dd314aa9c9dee6f"
+  integrity sha512-VwyB3Lkgacfik2vhqR4uv2rvebqmDvFu4jlN/C1RzWoJEo8I7z4Q404oiqYCkq41mni8EzQnm95emU9seckwtg==
+  dependencies:
+    circular-json "^0.3.1"
+    graceful-fs "^4.1.2"
+    rimraf "~2.6.2"
+    write "^0.2.1"
+
+flatted@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.0.tgz#55122b6536ea496b4b44893ee2608141d10d9916"
+  integrity sha512-R+H8IZclI8AAkSBRQJLVOsxwAoHd6WC40b4QTNWIjzAa6BXOBfQcM587MXDTVPeYaopFNWHUFLx7eNmHDSxMWg==
+
+flow-bin@^0.61.0:
+  version "0.61.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.61.0.tgz#d0473a8c35dbbf4de573823f4932124397d32d35"
+  integrity sha512-w6SGi5CDfKLNGzYssRhW6N37qKclDXijsxDQ5M8c3WbivRYta0Horv22bwakegfKBVDnyeS0lRW3OqBC74eq2g==
+
+flow-remove-types-no-whitespace@^1.0.3:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/flow-remove-types-no-whitespace/-/flow-remove-types-no-whitespace-1.0.5.tgz#3d297985a0bed5197b8fb0cbe89ec163f8dea9eb"
+  integrity sha1-PSl5haC+1Rl7j7DL6J7BY/jeqes=
+  dependencies:
+    babylon "^6.8.4"
+    magic-string "^0.16.0"
+
+flush-write-stream@^1.0.0:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.0.3.tgz#c5d586ef38af6097650b49bc41b55fabb19f35bd"
+  integrity sha512-calZMC10u0FMUqoiunI2AiGIIUtUIvifNwkHhNupZH4cbNnW1Itkoh/Nf5HFYmDrwWPjrUxpkZT0KhuCq0jmGw==
+  dependencies:
+    inherits "^2.0.1"
+    readable-stream "^2.0.4"
+
+follow-redirects@^1.0.0:
+  version "1.14.7"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.7.tgz#2004c02eb9436eee9a21446a6477debf17e81685"
+  integrity sha512-+hbxoLbFMbRKDwohX8GkTataGqO6Jb7jGwpAlwgy2bIz25XtRm7KEzJM76R1WiNT5SwZkX4Y75SwBolkpmE7iQ==
+
+for-in@^1.0.1, for-in@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
+  integrity sha1-gQaNKVqBQuwKxybG4iAMMPttXoA=
+
+for-own@^0.1.4:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/for-own/-/for-own-0.1.5.tgz#5265c681a4f294dabbf17c9509b6763aa84510ce"
+  integrity sha1-UmXGgaTylNq78XyVCbZ2OqhFEM4=
+  dependencies:
+    for-in "^1.0.1"
+
+forever-agent@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"
+  integrity sha1-+8cfDEGt6zf5bFd60e1C2P2sypE=
+
+form-data@~2.3.2:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.3.tgz#dcce52c05f644f298c6a7ab936bd724ceffbf3a6"
+  integrity sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "^1.0.6"
+    mime-types "^2.1.12"
+
+fragment-cache@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/fragment-cache/-/fragment-cache-0.2.1.tgz#4290fad27f13e89be7f33799c6bc5a0abfff0d19"
+  integrity sha1-QpD60n8T6Jvn8zeZxrxaCr//DRk=
+  dependencies:
+    map-cache "^0.2.2"
+
+from2@^2.1.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/from2/-/from2-2.3.0.tgz#8bfb5502bde4a4d36cfdeea007fcca21d7e382af"
+  integrity sha1-i/tVAr3kpNNs/e6gB/zKIdfjgq8=
+  dependencies:
+    inherits "^2.0.1"
+    readable-stream "^2.0.0"
+
+fs-access@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/fs-access/-/fs-access-1.0.1.tgz#d6a87f262271cefebec30c553407fb995da8777a"
+  integrity sha1-1qh/JiJxzv6+wwxVNAf7mV2od3o=
+  dependencies:
+    null-check "^1.0.0"
+
+fs-exists-sync@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/fs-exists-sync/-/fs-exists-sync-0.1.0.tgz#982d6893af918e72d08dec9e8673ff2b5a8d6add"
+  integrity sha1-mC1ok6+RjnLQjeyehnP/K1qNat0=
+
+fs-extra@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-1.0.0.tgz#cd3ce5f7e7cb6145883fcae3191e9877f8587950"
+  integrity sha1-zTzl9+fLYUWIP8rjGR6Yd/hYeVA=
+  dependencies:
+    graceful-fs "^4.1.2"
+    jsonfile "^2.1.0"
+    klaw "^1.0.0"
+
+fs-minipass@^1.2.7:
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.7.tgz#ccff8570841e7fe4265693da88936c55aed7f7c7"
+  integrity sha512-GWSSJGFy4e9GUeCcbIkED+bgAoFyj7XF1mV8rma3QW4NIqX9Kyx79N/PF61H5udOV3aY1IaMLs6pGbH71nlCTA==
+  dependencies:
+    minipass "^2.6.0"
+
+fs-write-stream-atomic@^1.0.8:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/fs-write-stream-atomic/-/fs-write-stream-atomic-1.0.10.tgz#b47df53493ef911df75731e70a9ded0189db40c9"
+  integrity sha1-tH31NJPvkR33VzHnCp3tAYnbQMk=
+  dependencies:
+    graceful-fs "^4.1.2"
+    iferr "^0.1.5"
+    imurmurhash "^0.1.4"
+    readable-stream "1 || 2"
+
+fs.realpath@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
+  integrity sha1-FQStJSMVjKpA20onh8sBQRmU6k8=
+
+fsevents@^1.2.2:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-1.2.4.tgz#f41dcb1af2582af3692da36fc55cbd8e1041c426"
+  integrity sha512-z8H8/diyk76B7q5wg+Ud0+CqzcAF3mBBI/bA5ne5zrRUUIvNkJY//D3BqyH571KuAC4Nr7Rw7CjWX4r0y9DvNg==
+  dependencies:
+    nan "^2.9.2"
+    node-pre-gyp "^0.10.0"
+
+ftp@~0.3.10:
+  version "0.3.10"
+  resolved "https://registry.yarnpkg.com/ftp/-/ftp-0.3.10.tgz#9197d861ad8142f3e63d5a83bfe4c59f7330885d"
+  integrity sha1-kZfYYa2BQvPmPVqDv+TFn3MwiF0=
+  dependencies:
+    readable-stream "1.1.x"
+    xregexp "2.0.0"
+
+function-bind@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
+  integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
+
+functional-red-black-tree@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
+  integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
+
+g-status@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/g-status/-/g-status-2.0.2.tgz#270fd32119e8fc9496f066fe5fe88e0a6bc78b97"
+  integrity sha512-kQoE9qH+T1AHKgSSD0Hkv98bobE90ILQcXAF4wvGgsr7uFqNvwmh8j+Lq3l0RVt3E3HjSbv2B9biEGcEtpHLCA==
+  dependencies:
+    arrify "^1.0.1"
+    matcher "^1.0.0"
+    simple-git "^1.85.0"
+
+gauge@~2.7.3:
+  version "2.7.4"
+  resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"
+  integrity sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=
+  dependencies:
+    aproba "^1.0.3"
+    console-control-strings "^1.0.0"
+    has-unicode "^2.0.0"
+    object-assign "^4.1.0"
+    signal-exit "^3.0.0"
+    string-width "^1.0.1"
+    strip-ansi "^3.0.1"
+    wide-align "^1.1.0"
+
+get-own-enumerable-property-symbols@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/get-own-enumerable-property-symbols/-/get-own-enumerable-property-symbols-3.0.0.tgz#b877b49a5c16aefac3655f2ed2ea5b684df8d203"
+  integrity sha512-CIJYJC4GGF06TakLg8z4GQKvDsx9EMspVxOYih7LerEL/WosUnFIww45CGfxfeKHqlg3twgUrYRT1O3WQqjGCg==
+
+get-pkg-repo@^1.0.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/get-pkg-repo/-/get-pkg-repo-1.4.0.tgz#c73b489c06d80cc5536c2c853f9e05232056972d"
+  integrity sha1-xztInAbYDMVTbCyFP54FIyBWly0=
+  dependencies:
+    hosted-git-info "^2.1.4"
+    meow "^3.3.0"
+    normalize-package-data "^2.3.0"
+    parse-github-repo-url "^1.3.0"
+    through2 "^2.0.0"
+
+get-stdin@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
+  integrity sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=
+
+get-stream@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
+  integrity sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ=
+
+get-stream@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-4.1.0.tgz#c1b255575f3dc21d59bfc79cd3d2b46b1c3a54b5"
+  integrity sha512-GMat4EJ5161kIy2HevLlr4luNjBgvmj413KaQA7jt4V8B4RDsfpHk7WQ9GVqfYyyx8OS/L66Kox+rJRNklLK7w==
+  dependencies:
+    pump "^3.0.0"
+
+get-uri@2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/get-uri/-/get-uri-2.0.2.tgz#5c795e71326f6ca1286f2fc82575cd2bab2af578"
+  integrity sha512-ZD325dMZOgerGqF/rF6vZXyFGTAay62svjQIT+X/oU2PtxYpFxvSkbsdi+oxIrsNxlZVd4y8wUDqkaExWTI/Cw==
+  dependencies:
+    data-uri-to-buffer "1"
+    debug "2"
+    extend "3"
+    file-uri-to-path "1"
+    ftp "~0.3.10"
+    readable-stream "2"
+
+get-value@^2.0.3, get-value@^2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/get-value/-/get-value-2.0.6.tgz#dc15ca1c672387ca76bd37ac0a395ba2042a2c28"
+  integrity sha1-3BXKHGcjh8p2vTesCjlbogQqLCg=
+
+getpass@^0.1.1:
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/getpass/-/getpass-0.1.7.tgz#5eff8e3e684d569ae4cb2b1282604e8ba62149fa"
+  integrity sha1-Xv+OPmhNVprkyysSgmBOi6YhSfo=
+  dependencies:
+    assert-plus "^1.0.0"
+
+git-raw-commits@^1.3.6:
+  version "1.3.6"
+  resolved "https://registry.yarnpkg.com/git-raw-commits/-/git-raw-commits-1.3.6.tgz#27c35a32a67777c1ecd412a239a6c19d71b95aff"
+  integrity sha512-svsK26tQ8vEKnMshTDatSIQSMDdz8CxIIqKsvPqbtV23Etmw6VNaFAitu8zwZ0VrOne7FztwPyRLxK7/DIUTQg==
+  dependencies:
+    dargs "^4.0.1"
+    lodash.template "^4.0.2"
+    meow "^4.0.0"
+    split2 "^2.0.0"
+    through2 "^2.0.0"
+
+git-remote-origin-url@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/git-remote-origin-url/-/git-remote-origin-url-2.0.0.tgz#5282659dae2107145a11126112ad3216ec5fa65f"
+  integrity sha1-UoJlna4hBxRaERJhEq0yFuxfpl8=
+  dependencies:
+    gitconfiglocal "^1.0.0"
+    pify "^2.3.0"
+
+git-semver-tags@^1.3.6:
+  version "1.3.6"
+  resolved "https://registry.yarnpkg.com/git-semver-tags/-/git-semver-tags-1.3.6.tgz#357ea01f7280794fe0927f2806bee6414d2caba5"
+  integrity sha512-2jHlJnln4D/ECk9FxGEBh3k44wgYdWjWDtMmJPaecjoRmxKo3Y1Lh8GMYuOPu04CHw86NTAODchYjC5pnpMQig==
+  dependencies:
+    meow "^4.0.0"
+    semver "^5.5.0"
+
+gitconfiglocal@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/gitconfiglocal/-/gitconfiglocal-1.0.0.tgz#41d045f3851a5ea88f03f24ca1c6178114464b9b"
+  integrity sha1-QdBF84UaXqiPA/JMocYXgRRGS5s=
+  dependencies:
+    ini "^1.3.2"
+
+glob-base@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/glob-base/-/glob-base-0.3.0.tgz#dbb164f6221b1c0b1ccf82aea328b497df0ea3c4"
+  integrity sha1-27Fk9iIbHAscz4Kuoyi0l98Oo8Q=
+  dependencies:
+    glob-parent "^2.0.0"
+    is-glob "^2.0.0"
+
+glob-parent@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-2.0.0.tgz#81383d72db054fcccf5336daa902f182f6edbb28"
+  integrity sha1-gTg9ctsFT8zPUzbaqQLxgvbtuyg=
+  dependencies:
+    is-glob "^2.0.0"
+
+glob-parent@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-3.1.0.tgz#9e6af6299d8d3bd2bd40430832bd113df906c5ae"
+  integrity sha1-nmr2KZ2NO9K9QEMIMr0RPfkGxa4=
+  dependencies:
+    is-glob "^3.1.0"
+    path-dirname "^1.0.0"
+
+glob@7.0.5:
+  version "7.0.5"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.0.5.tgz#b4202a69099bbb4d292a7c1b95b6682b67ebdc95"
+  integrity sha1-tCAqaQmbu00pKnwblbZoK2fr3JU=
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.2"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+glob@7.1.1:
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.1.tgz#805211df04faaf1c63a3600306cdf5ade50b2ec8"
+  integrity sha1-gFIR3wT6rxxjo2ADBs31reULLsg=
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.2"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+glob@^5.0.15:
+  version "5.0.15"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
+  integrity sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=
+  dependencies:
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "2 || 3"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.6, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3:
+  version "7.1.3"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.3.tgz#3960832d3f1574108342dafd3a67b332c0969df1"
+  integrity sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==
+  dependencies:
+    fs.realpath "^1.0.0"
+    inflight "^1.0.4"
+    inherits "2"
+    minimatch "^3.0.4"
+    once "^1.3.0"
+    path-is-absolute "^1.0.0"
+
+global-modules@^0.2.3:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/global-modules/-/global-modules-0.2.3.tgz#ea5a3bed42c6d6ce995a4f8a1269b5dae223828d"
+  integrity sha1-6lo77ULG1s6ZWk+KEmm12uIjgo0=
+  dependencies:
+    global-prefix "^0.1.4"
+    is-windows "^0.2.0"
+
+global-prefix@^0.1.4:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/global-prefix/-/global-prefix-0.1.5.tgz#8d3bc6b8da3ca8112a160d8d496ff0462bfef78f"
+  integrity sha1-jTvGuNo8qBEqFg2NSW/wRiv+948=
+  dependencies:
+    homedir-polyfill "^1.0.0"
+    ini "^1.3.4"
+    is-windows "^0.2.0"
+    which "^1.2.12"
+
+globals@^11.1.0, globals@^11.7.0:
+  version "11.9.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-11.9.0.tgz#bde236808e987f290768a93d065060d78e6ab249"
+  integrity sha512-5cJVtyXWH8PiJPVLZzzoIizXx944O4OmRro5MWKx5fT4MgcN7OfaMutPeaTdJCCURwbWdhhcCWcKIffPnmTzBg==
+
+globals@^9.18.0:
+  version "9.18.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
+  integrity sha512-S0nG3CLEQiY/ILxqtztTWH/3iRRdyBLw6KMDxnKMchrtbj2OFmehVh0WUCfW3DUrIgx/qFrJPICrq4Z4sTR9UQ==
+
+globby@^6.1.0:
+  version "6.1.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-6.1.0.tgz#f5a6d70e8395e21c858fb0489d64df02424d506c"
+  integrity sha1-9abXDoOV4hyFj7BInWTfAkJNUGw=
+  dependencies:
+    array-union "^1.0.1"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
+graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
+  version "4.1.15"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz#ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00"
+  integrity sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==
+
+"graceful-readlink@>= 1.0.0":
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
+  integrity sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=
+
+growl@1.9.2:
+  version "1.9.2"
+  resolved "https://registry.yarnpkg.com/growl/-/growl-1.9.2.tgz#0ea7743715db8d8de2c5ede1775e1b45ac85c02f"
+  integrity sha1-Dqd0NxXbjY3ixe3hd14bRayFwC8=
+
+handlebars@^4.0.1, handlebars@^4.0.2:
+  version "4.7.7"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.7.tgz#9ce33416aad02dbd6c8fafa8240d5d98004945a1"
+  integrity sha512-aAcXm5OAfE/8IXkcZvCepKU3VzW1/39Fb5ZuqMtgI/hT8X2YgoMvBY5dLhq/cpOvw7Lk1nK/UF71aLG/ZnVYRA==
+  dependencies:
+    minimist "^1.2.5"
+    neo-async "^2.6.0"
+    source-map "^0.6.1"
+    wordwrap "^1.0.0"
+  optionalDependencies:
+    uglify-js "^3.1.4"
+
+har-schema@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/har-schema/-/har-schema-2.0.0.tgz#a94c2224ebcac04782a0d9035521f24735b7ec92"
+  integrity sha1-qUwiJOvKwEeCoNkDVSHyRzW37JI=
+
+har-validator@~5.1.0:
+  version "5.1.3"
+  resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-5.1.3.tgz#1ef89ebd3e4996557675eed9893110dc350fa080"
+  integrity sha512-sNvOCzEQNr/qrvJgc3UG/kD4QtlHycrzwS+6mfTrrSq97BvaYcPZZI1ZSqGSPR73Cxn4LKTD4PttRwfU7jWq5g==
+  dependencies:
+    ajv "^6.5.5"
+    har-schema "^2.0.0"
+
+has-ansi@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/has-ansi/-/has-ansi-2.0.0.tgz#34f5049ce1ecdf2b0649af3ef24e45ed35416d91"
+  integrity sha1-NPUEnOHs3ysGSa8+8k5F7TVBbZE=
+  dependencies:
+    ansi-regex "^2.0.0"
+
+has-binary2@~1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has-binary2/-/has-binary2-1.0.3.tgz#7776ac627f3ea77250cfc332dab7ddf5e4f5d11d"
+  integrity sha512-G1LWKhDSvhGeAQ8mPVQlqNcOB2sJdwATtZKl2pDKKHfpf/rYj24lkinxf69blJbnsvtqqNU+L3SL50vzZhXOnw==
+  dependencies:
+    isarray "2.0.1"
+
+has-cors@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/has-cors/-/has-cors-1.1.0.tgz#5e474793f7ea9843d1bb99c23eef49ff126fff39"
+  integrity sha1-XkdHk/fqmEPRu5nCPu9J/xJv/zk=
+
+has-flag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
+  integrity sha1-nZ55MWXOAXoA8AQYxD+UKnsdEfo=
+
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+  integrity sha1-tdRU3CGZriJWmfNGfloH87lVuv0=
+
+has-symbols@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.0.tgz#ba1a8f1af2a0fc39650f5c850367704122063b44"
+  integrity sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q=
+
+has-unicode@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
+  integrity sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=
+
+has-value@^0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/has-value/-/has-value-0.3.1.tgz#7b1f58bada62ca827ec0a2078025654845995e1f"
+  integrity sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=
+  dependencies:
+    get-value "^2.0.3"
+    has-values "^0.1.4"
+    isobject "^2.0.0"
+
+has-value@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-value/-/has-value-1.0.0.tgz#18b281da585b1c5c51def24c930ed29a0be6b177"
+  integrity sha1-GLKB2lhbHFxR3vJMkw7SmgvmsXc=
+  dependencies:
+    get-value "^2.0.6"
+    has-values "^1.0.0"
+    isobject "^3.0.0"
+
+has-values@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/has-values/-/has-values-0.1.4.tgz#6d61de95d91dfca9b9a02089ad384bff8f62b771"
+  integrity sha1-bWHeldkd/Km5oCCJrThL/49it3E=
+
+has-values@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-values/-/has-values-1.0.0.tgz#95b0b63fec2146619a6fe57fe75628d5a39efe4f"
+  integrity sha1-lbC2P+whRmGab+V/51Yo1aOe/k8=
+  dependencies:
+    is-number "^3.0.0"
+    kind-of "^4.0.0"
+
+has@^1.0.1, has@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
+  integrity sha512-f2dvO0VU6Oej7RkWJGrehjbzMAjFp5/VKPp5tTpWIV4JHHZK1/BxbFRtf/siA2SWTe09caDmVtYYzWEIbBS4zw==
+  dependencies:
+    function-bind "^1.1.1"
+
+hash-base@^3.0.0:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/hash-base/-/hash-base-3.0.4.tgz#5fc8686847ecd73499403319a6b0a3f3f6ae4918"
+  integrity sha1-X8hoaEfs1zSZQDMZprCj8/auSRg=
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+hash-sum@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/hash-sum/-/hash-sum-1.0.2.tgz#33b40777754c6432573c120cc3808bbd10d47f04"
+  integrity sha1-M7QHd3VMZDJXPBIMw4CLvRDUfwQ=
+
+hash.js@^1.0.0, hash.js@^1.0.3:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.1.7.tgz#0babca538e8d4ee4a0f8988d68866537a003cf42"
+  integrity sha512-taOaskGt4z4SOANNseOviYDvjEJinIkRgmp7LbKP2YTTmVxWBl87s/uzK9r+44BclBSp2X7K1hqeNfz9JbBeXA==
+  dependencies:
+    inherits "^2.0.3"
+    minimalistic-assert "^1.0.1"
+
+hasha@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/hasha/-/hasha-2.2.0.tgz#78d7cbfc1e6d66303fe79837365984517b2f6ee1"
+  integrity sha1-eNfL/B5tZjA/55g3NlmEUXsvbuE=
+  dependencies:
+    is-stream "^1.0.1"
+    pinkie-promise "^2.0.0"
+
+he@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
+  integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==
+
+hmac-drbg@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
+  integrity sha1-0nRXAQJabHdabFRXk+1QL8DGSaE=
+  dependencies:
+    hash.js "^1.0.3"
+    minimalistic-assert "^1.0.0"
+    minimalistic-crypto-utils "^1.0.1"
+
+home-or-tmp@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/home-or-tmp/-/home-or-tmp-3.0.0.tgz#57a8fe24cf33cdd524860a15821ddc25c86671fb"
+  integrity sha1-V6j+JM8zzdUkhgoVgh3cJchmcfs=
+
+homedir-polyfill@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/homedir-polyfill/-/homedir-polyfill-1.0.1.tgz#4c2bbc8a758998feebf5ed68580f76d46768b4bc"
+  integrity sha1-TCu8inWJmP7r9e1oWA921GdotLw=
+  dependencies:
+    parse-passwd "^1.0.0"
+
+hosted-git-info@^2.1.4:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.7.1.tgz#97f236977bd6e125408930ff6de3eec6281ec047"
+  integrity sha512-7T/BxH19zbcCTa8XkMlbK5lTo1WtgkFi3GvdWEyNuc4Vex7/9Dqbnpsf4JMydcfj9HCg4zUWFTL3Za6lapg5/w==
+
+http-errors@1.6.3, http-errors@~1.6.3:
+  version "1.6.3"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-1.6.3.tgz#8b55680bb4be283a0b5bf4ea2e38580be1d9320d"
+  integrity sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=
+  dependencies:
+    depd "~1.1.2"
+    inherits "2.0.3"
+    setprototypeof "1.1.0"
+    statuses ">= 1.4.0 < 2"
+
+http-proxy-agent@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/http-proxy-agent/-/http-proxy-agent-1.0.0.tgz#cc1ce38e453bf984a0f7702d2dd59c73d081284a"
+  integrity sha1-zBzjjkU7+YSg93AtLdWcc9CBKEo=
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+
+http-proxy@^1.13.0, http-proxy@^1.18.0:
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
+  integrity sha512-7mz/721AbnJwIVbnaSv1Cz3Am0ZLT/UBwkC92VlxhXv/k/BBQfM2fXElQNC27BVGr0uwUpplYPQM9LnaBMR5NQ==
+  dependencies:
+    eventemitter3 "^4.0.0"
+    follow-redirects "^1.0.0"
+    requires-port "^1.0.0"
+
+http-server@^0.12.3:
+  version "0.12.3"
+  resolved "https://registry.yarnpkg.com/http-server/-/http-server-0.12.3.tgz#ba0471d0ecc425886616cb35c4faf279140a0d37"
+  integrity sha512-be0dKG6pni92bRjq0kvExtj/NrrAd28/8fCXkaI/4piTwQMSDSLMhWyW0NI1V+DBI3aa1HMlQu46/HjVLfmugA==
+  dependencies:
+    basic-auth "^1.0.3"
+    colors "^1.4.0"
+    corser "^2.0.1"
+    ecstatic "^3.3.2"
+    http-proxy "^1.18.0"
+    minimist "^1.2.5"
+    opener "^1.5.1"
+    portfinder "^1.0.25"
+    secure-compare "3.0.1"
+    union "~0.5.0"
+
+http-signature@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/http-signature/-/http-signature-1.2.0.tgz#9aecd925114772f3d95b65a60abb8f7c18fbace1"
+  integrity sha1-muzZJRFHcvPZW2WmCruPfBj7rOE=
+  dependencies:
+    assert-plus "^1.0.0"
+    jsprim "^1.2.2"
+    sshpk "^1.7.0"
+
+https-browserify@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/https-browserify/-/https-browserify-1.0.0.tgz#ec06c10e0a34c0f2faf199f7fd7fc78fffd03c73"
+  integrity sha1-7AbBDgo0wPL68Zn3/X/Hj//QPHM=
+
+https-proxy-agent@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-1.0.0.tgz#35f7da6c48ce4ddbfa264891ac593ee5ff8671e6"
+  integrity sha1-NffabEjOTdv6JkiRrFk+5f+GceY=
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+
+https-proxy-agent@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.1.tgz#51552970fa04d723e04c56d04178c3f92592bbc0"
+  integrity sha512-HPCTS1LW51bcyMYbxUIOO4HEOlQ1/1qRaFWcyxvwaqUS9TY88aoEuHUY33kuAh1YhVVaDQhLZsnPd+XNARWZlQ==
+  dependencies:
+    agent-base "^4.1.0"
+    debug "^3.1.0"
+
+iconv-lite@0.4.23:
+  version "0.4.23"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.23.tgz#297871f63be507adcfbfca715d0cd0eed84e9a63"
+  integrity sha512-neyTUVFtahjf0mB3dZT77u+8O0QB89jFdnBkd5P1JgYPbPaia3gXXOVL2fq8VyU2gMMD7SaN7QukTB/pmXYvDA==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
+
+iconv-lite@^0.4.17, iconv-lite@^0.4.24, iconv-lite@^0.4.4, iconv-lite@~0.4.13:
+  version "0.4.24"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.24.tgz#2022b4b25fbddc21d2f524974a474aafe733908b"
+  integrity sha512-v3MXnZAcvnywkTUEZomIActle7RXXeedOR31wwl7VlyoXO4Qi9arvSenNQWne1TcRwhCL1HwLI21bEqdpj8/rA==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3"
+
+ieee754@^1.1.4:
+  version "1.1.12"
+  resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.12.tgz#50bf24e5b9c8bb98af4964c941cdb0918da7b60b"
+  integrity sha512-GguP+DRY+pJ3soyIiGPTvdiVXjZ+DbXOxGpXn3eMvNW4x4irjqXm4wHKscC+TfxSJ0yw/S1F24tqdMNsMZTiLA==
+
+iferr@^0.1.5:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/iferr/-/iferr-0.1.5.tgz#c60eed69e6d8fdb6b3104a1fcbca1c192dc5b501"
+  integrity sha1-xg7taebY/bazEEofy8ocGS3FtQE=
+
+ignore-walk@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/ignore-walk/-/ignore-walk-3.0.1.tgz#a83e62e7d272ac0e3b551aaa82831a19b69f82f8"
+  integrity sha512-DTVlMx3IYPe0/JJcYP7Gxg7ttZZu3IInhuEhbchuqneY9wWe5Ojy2mXLBaQFUQmo0AW2r3qG7m1mg86js+gnlQ==
+  dependencies:
+    minimatch "^3.0.4"
+
+ignore@^4.0.6:
+  version "4.0.6"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
+  integrity sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==
+
+immediate@~3.0.5:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.0.6.tgz#9db1dbd0faf8de6fbe0f5dd5e56bb606280de69b"
+  integrity sha1-nbHb0Pr43m++D13V5Wu2BigN5ps=
+
+import-fresh@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-3.0.0.tgz#a3d897f420cab0e671236897f75bc14b4885c390"
+  integrity sha512-pOnA9tfM3Uwics+SaBLCNyZZZbK+4PTu0OPZtLlMIrv17EdBoC15S9Kn8ckJ9TZTyKb3ywNE5y1yeDxxGA7nTQ==
+  dependencies:
+    parent-module "^1.0.0"
+    resolve-from "^4.0.0"
+
+imurmurhash@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
+  integrity sha1-khi5srkoojixPcT7a21XbyMUU+o=
+
+indent-string@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-2.1.0.tgz#8e2d48348742121b4a8218b7a137e9a52049dc80"
+  integrity sha1-ji1INIdCEhtKghi3oTfppSBJ3IA=
+  dependencies:
+    repeating "^2.0.0"
+
+indent-string@^3.0.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/indent-string/-/indent-string-3.2.0.tgz#4a5fd6d27cc332f37e5419a504dbb837105c9289"
+  integrity sha1-Sl/W0nzDMvN+VBmlBNu4NxBckok=
+
+indexof@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
+  integrity sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=
+
+inflight@^1.0.4:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
+  integrity sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=
+  dependencies:
+    once "^1.3.0"
+    wrappy "1"
+
+inherits@2, inherits@^2.0.1, inherits@^2.0.3, inherits@^2.0.4, inherits@~2.0.1, inherits@~2.0.3:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
+
+inherits@2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
+  integrity sha1-sX0I0ya0Qj5Wjv9xn5GwscvfafE=
+
+inherits@2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
+  integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
+
+ini@^1.3.2, ini@^1.3.4, ini@~1.3.0:
+  version "1.3.8"
+  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.8.tgz#a29da425b48806f34767a4efce397269af28432c"
+  integrity sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew==
+
+inquirer@1.2.3:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-1.2.3.tgz#4dec6f32f37ef7bb0b2ed3f1d1a5c3f545074918"
+  integrity sha1-TexvMvN+97sLLtPx0aXD9UUHSRg=
+  dependencies:
+    ansi-escapes "^1.1.0"
+    chalk "^1.0.0"
+    cli-cursor "^1.0.1"
+    cli-width "^2.0.0"
+    external-editor "^1.1.0"
+    figures "^1.3.5"
+    lodash "^4.3.0"
+    mute-stream "0.0.6"
+    pinkie-promise "^2.0.0"
+    run-async "^2.2.0"
+    rx "^4.1.0"
+    string-width "^1.0.1"
+    strip-ansi "^3.0.0"
+    through "^2.3.6"
+
+inquirer@3.0.6:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-3.0.6.tgz#e04aaa9d05b7a3cb9b0f407d04375f0447190347"
+  integrity sha1-4EqqnQW3o8ubD0B9BDdfBEcZA0c=
+  dependencies:
+    ansi-escapes "^1.1.0"
+    chalk "^1.0.0"
+    cli-cursor "^2.1.0"
+    cli-width "^2.0.0"
+    external-editor "^2.0.1"
+    figures "^2.0.0"
+    lodash "^4.3.0"
+    mute-stream "0.0.7"
+    run-async "^2.2.0"
+    rx "^4.1.0"
+    string-width "^2.0.0"
+    strip-ansi "^3.0.0"
+    through "^2.3.6"
+
+inquirer@^6.1.0:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-6.2.1.tgz#9943fc4882161bdb0b0c9276769c75b32dbfcd52"
+  integrity sha512-088kl3DRT2dLU5riVMKKr1DlImd6X7smDhpXUCkJDCKvTEJeRiXh0G132HG9u5a+6Ylw9plFRY7RuTnwohYSpg==
+  dependencies:
+    ansi-escapes "^3.0.0"
+    chalk "^2.0.0"
+    cli-cursor "^2.1.0"
+    cli-width "^2.0.0"
+    external-editor "^3.0.0"
+    figures "^2.0.0"
+    lodash "^4.17.10"
+    mute-stream "0.0.7"
+    run-async "^2.2.0"
+    rxjs "^6.1.0"
+    string-width "^2.1.0"
+    strip-ansi "^5.0.0"
+    through "^2.3.6"
+
+interpret@^1.0.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.2.0.tgz#d5061a6224be58e8083985f5014d844359576296"
+  integrity sha512-mT34yGKMNceBQUoVn7iCDKDntA7SC6gycMAWzGx1z/CMCTV7b2AAtXlo3nRyHZ1FelRkQbQjprHSYGwzLtkVbw==
+
+invariant@^2.2.2:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/invariant/-/invariant-2.2.4.tgz#610f3c92c9359ce1db616e538008d23ff35158e6"
+  integrity sha512-phJfQVBuaJM5raOpJjSfkiD6BpbCE4Ns//LaXl6wGYtUBY83nWS6Rf9tXm2e8VaK60JEjYldbPif/A2B1C2gNA==
+  dependencies:
+    loose-envify "^1.0.0"
+
+ip-regex@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/ip-regex/-/ip-regex-2.1.0.tgz#fa78bf5d2e6913c911ce9f819ee5146bb6d844e9"
+  integrity sha1-+ni/XS5pE8kRzp+BnuUUa7bYROk=
+
+ip@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/ip/-/ip-1.0.1.tgz#c7e356cdea225ae71b36d70f2e71a92ba4e42590"
+  integrity sha1-x+NWzeoiWucbNtcPLnGpK6TkJZA=
+
+ip@^1.1.4:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/ip/-/ip-1.1.5.tgz#bdded70114290828c0a039e72ef25f5aaec4354a"
+  integrity sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo=
+
+is-accessor-descriptor@^0.1.6:
+  version "0.1.6"
+  resolved "https://registry.yarnpkg.com/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz#a9e12cb3ae8d876727eeef3843f8a0897b5c98d6"
+  integrity sha1-qeEss66Nh2cn7u84Q/igiXtcmNY=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-accessor-descriptor@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz#169c2f6d3df1f992618072365c9b0ea1f6878656"
+  integrity sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==
+  dependencies:
+    kind-of "^6.0.0"
+
+is-arrayish@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
+  integrity sha1-d8mYQFJ6qOyxqLppe4BkWnqSap0=
+
+is-binary-path@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-1.0.1.tgz#75f16642b480f187a711c814161fd3a4a7655898"
+  integrity sha1-dfFmQrSA8YenEcgUFh/TpKdlWJg=
+  dependencies:
+    binary-extensions "^1.0.0"
+
+is-buffer@^1.1.5:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
+  integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==
+
+is-builtin-module@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-builtin-module/-/is-builtin-module-1.0.0.tgz#540572d34f7ac3119f8f76c30cbc1b1e037affbe"
+  integrity sha1-VAVy0096wxGfj3bDDLwbHgN6/74=
+  dependencies:
+    builtin-modules "^1.0.0"
+
+is-callable@^1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
+  integrity sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==
+
+is-ci@^1.0.10:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.2.1.tgz#e3779c8ee17fccf428488f6e281187f2e632841c"
+  integrity sha512-s6tfsaQaQi3JNciBH6shVqEDvhGut0SUXr31ag8Pd8BBbVVlcGfWhpPmEOoM6RJ5TFhbypvf5yyRw/VXW1IiWg==
+  dependencies:
+    ci-info "^1.5.0"
+
+is-data-descriptor@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz#0b5ee648388e2c860282e793f1856fec3f301b56"
+  integrity sha1-C17mSDiOLIYCgueT8YVv7D8wG1Y=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-data-descriptor@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz#d84876321d0e7add03990406abbbbd36ba9268c7"
+  integrity sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==
+  dependencies:
+    kind-of "^6.0.0"
+
+is-date-object@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
+  integrity sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=
+
+is-descriptor@^0.1.0:
+  version "0.1.6"
+  resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-0.1.6.tgz#366d8240dde487ca51823b1ab9f07a10a78251ca"
+  integrity sha512-avDYr0SB3DwO9zsMov0gKCESFYqCnE4hq/4z3TdUlukEy5t9C0YRq7HLrsN52NAcqXKaepeCD0n+B0arnVG3Hg==
+  dependencies:
+    is-accessor-descriptor "^0.1.6"
+    is-data-descriptor "^0.1.4"
+    kind-of "^5.0.0"
+
+is-descriptor@^1.0.0, is-descriptor@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-descriptor/-/is-descriptor-1.0.2.tgz#3b159746a66604b04f8c81524ba365c5f14d86ec"
+  integrity sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==
+  dependencies:
+    is-accessor-descriptor "^1.0.0"
+    is-data-descriptor "^1.0.0"
+    kind-of "^6.0.2"
+
+is-directory@^0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/is-directory/-/is-directory-0.3.1.tgz#61339b6f2475fc772fd9c9d83f5c8575dc154ae1"
+  integrity sha1-YTObbyR1/Hcv2cnYP1yFddwVSuE=
+
+is-dotfile@^1.0.0:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/is-dotfile/-/is-dotfile-1.0.3.tgz#a6a2f32ffd2dfb04f5ca25ecd0f6b83cf798a1e1"
+  integrity sha1-pqLzL/0t+wT1yiXs0Pa4PPeYoeE=
+
+is-equal-shallow@^0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/is-equal-shallow/-/is-equal-shallow-0.1.3.tgz#2238098fc221de0bcfa5d9eac4c45d638aa1c534"
+  integrity sha1-IjgJj8Ih3gvPpdnqxMRdY4qhxTQ=
+  dependencies:
+    is-primitive "^2.0.0"
+
+is-extendable@^0.1.0, is-extendable@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-0.1.1.tgz#62b110e289a471418e3ec36a617d472e301dfc89"
+  integrity sha1-YrEQ4omkcUGOPsNqYX1HLjAd/Ik=
+
+is-extendable@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-extendable/-/is-extendable-1.0.1.tgz#a7470f9e426733d81bd81e1155264e3a3507cab4"
+  integrity sha512-arnXMxT1hhoKo9k1LZdmlNyJdDDfy2v0fXjFlmok4+i8ul/6WlbVge9bhM74OpNPQPMGUToDtz+KXa1PneJxOA==
+  dependencies:
+    is-plain-object "^2.0.4"
+
+is-extglob@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-1.0.0.tgz#ac468177c4943405a092fc8f29760c6ffc6206c0"
+  integrity sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA=
+
+is-extglob@^2.1.0, is-extglob@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-2.1.1.tgz#a88c02535791f02ed37c76a1b9ea9773c833f8c2"
+  integrity sha1-qIwCU1eR8C7TfHahueqXc8gz+MI=
+
+is-finite@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-finite/-/is-finite-1.0.2.tgz#cc6677695602be550ef11e8b4aa6305342b6d0aa"
+  integrity sha1-zGZ3aVYCvlUO8R6LSqYwU0K20Ko=
+  dependencies:
+    number-is-nan "^1.0.0"
+
+is-fullwidth-code-point@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz#ef9e31386f031a7f0d643af82fde50c457ef00cb"
+  integrity sha1-754xOG8DGn8NZDr4L95QxFfvAMs=
+  dependencies:
+    number-is-nan "^1.0.0"
+
+is-fullwidth-code-point@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz#a3b30a5c4f199183167aaab93beefae3ddfb654f"
+  integrity sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=
+
+is-glob@^2.0.0, is-glob@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-2.0.1.tgz#d096f926a3ded5600f3fdfd91198cb0888c2d863"
+  integrity sha1-0Jb5JqPe1WAPP9/ZEZjLCIjC2GM=
+  dependencies:
+    is-extglob "^1.0.0"
+
+is-glob@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-3.1.0.tgz#7ba5ae24217804ac70707b96922567486cc3e84a"
+  integrity sha1-e6WuJCF4BKxwcHuWkiVnSGzD6Eo=
+  dependencies:
+    is-extglob "^2.1.0"
+
+is-glob@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-4.0.0.tgz#9521c76845cc2610a85203ddf080a958c2ffabc0"
+  integrity sha1-lSHHaEXMJhCoUgPd8ICpWML/q8A=
+  dependencies:
+    is-extglob "^2.1.1"
+
+is-module@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-module/-/is-module-1.0.0.tgz#3258fb69f78c14d5b815d664336b4cffb6441591"
+  integrity sha1-Mlj7afeMFNW4FdZkM2tM/7ZEFZE=
+
+is-number@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-0.1.1.tgz#69a7af116963d47206ec9bd9b48a14216f1e3806"
+  integrity sha1-aaevEWlj1HIG7JvZtIoUIW8eOAY=
+
+is-number@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-2.1.0.tgz#01fcbbb393463a548f2f466cce16dece49db908f"
+  integrity sha1-Afy7s5NGOlSPL0ZszhbezknbkI8=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-number@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-3.0.0.tgz#24fd6201a4782cf50561c810276afc7d12d71195"
+  integrity sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=
+  dependencies:
+    kind-of "^3.0.2"
+
+is-number@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-4.0.0.tgz#0026e37f5454d73e356dfe6564699867c6a7f0ff"
+  integrity sha512-rSklcAIlf1OmFdyAqbnWTLVelsQ58uvZ66S/ZyawjWqIviTWCjg2PzVGw8WUA+nNuPTqb4wgA+NszrJ+08LlgQ==
+
+is-obj@^1.0.0, is-obj@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-obj/-/is-obj-1.0.1.tgz#3e4729ac1f5fde025cd7d83a896dab9f4f67db0f"
+  integrity sha1-PkcprB9f3gJc19g6iW2rn09n2w8=
+
+is-observable@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-observable/-/is-observable-1.1.0.tgz#b3e986c8f44de950867cab5403f5a3465005975e"
+  integrity sha512-NqCa4Sa2d+u7BWc6CukaObG3Fh+CU9bvixbpcXYhy2VvYS7vVGIdAgnIS5Ks3A/cqk4rebLJ9s8zBstT2aKnIA==
+  dependencies:
+    symbol-observable "^1.1.0"
+
+is-path-cwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-cwd/-/is-path-cwd-1.0.0.tgz#d225ec23132e89edd38fda767472e62e65f1106d"
+  integrity sha1-0iXsIxMuie3Tj9p2dHLmLmXxEG0=
+
+is-path-in-cwd@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-path-in-cwd/-/is-path-in-cwd-1.0.1.tgz#5ac48b345ef675339bd6c7a48a912110b241cf52"
+  integrity sha512-FjV1RTW48E7CWM7eE/J2NJvAEEVektecDBVBE5Hh3nM1Jd0kvhHtX68Pr3xsDf857xt3Y4AkwVULK1Vku62aaQ==
+  dependencies:
+    is-path-inside "^1.0.0"
+
+is-path-inside@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-1.0.1.tgz#8ef5b7de50437a3fdca6b4e865ef7aa55cb48036"
+  integrity sha1-jvW33lBDej/cprToZe96pVy0gDY=
+  dependencies:
+    path-is-inside "^1.0.1"
+
+is-plain-obj@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-plain-obj/-/is-plain-obj-1.1.0.tgz#71a50c8429dfca773c92a390a4a03b39fcd51d3e"
+  integrity sha1-caUMhCnfync8kqOQpKA7OfzVHT4=
+
+is-plain-object@^2.0.1, is-plain-object@^2.0.3, is-plain-object@^2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/is-plain-object/-/is-plain-object-2.0.4.tgz#2c163b3fafb1b606d9d17928f05c2a1c38e07677"
+  integrity sha512-h5PpgXkWitc38BBMYawTYMWJHFZJVnBquFE57xFpjB8pJFiF6gZ+bU+WyI/yqXiFR5mdLsgYNaPe8uao6Uv9Og==
+  dependencies:
+    isobject "^3.0.1"
+
+is-posix-bracket@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/is-posix-bracket/-/is-posix-bracket-0.1.1.tgz#3334dc79774368e92f016e6fbc0a88f5cd6e6bc4"
+  integrity sha1-MzTceXdDaOkvAW5vvAqI9c1ua8Q=
+
+is-primitive@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
+  integrity sha1-IHurkWOEmcB7Kt8kCkGochADRXU=
+
+is-promise@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
+  integrity sha1-eaKp7OfwlugPNtKy87wWwf9L8/o=
+
+is-regex@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.4.tgz#5517489b547091b0930e095654ced25ee97e9491"
+  integrity sha1-VRdIm1RwkbCTDglWVM7SXul+lJE=
+  dependencies:
+    has "^1.0.1"
+
+is-regexp@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-regexp/-/is-regexp-1.0.0.tgz#fd2d883545c46bac5a633e7b9a09e87fa2cb5069"
+  integrity sha1-/S2INUXEa6xaYz57mgnof6LLUGk=
+
+is-stream@^1.0.1, is-stream@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
+  integrity sha1-EtSj3U5o4Lec6428hBc66A2RykQ=
+
+is-subset@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/is-subset/-/is-subset-0.1.1.tgz#8a59117d932de1de00f245fcdd39ce43f1e939a6"
+  integrity sha1-ilkRfZMt4d4A8kX83TnOQ/HpOaY=
+
+is-symbol@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.2.tgz#a055f6ae57192caee329e7a860118b497a950f38"
+  integrity sha512-HS8bZ9ox60yCJLH9snBpIwv9pYUAkcuLhSA1oero1UB5y9aiQpRA8y2ex945AOtCZL1lJDeIk3G5LthswI46Lw==
+  dependencies:
+    has-symbols "^1.0.0"
+
+is-text-path@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-text-path/-/is-text-path-1.0.1.tgz#4e1aa0fb51bfbcb3e92688001397202c1775b66e"
+  integrity sha1-Thqg+1G/vLPpJogAE5cgLBd1tm4=
+  dependencies:
+    text-extensions "^1.0.0"
+
+is-typedarray@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
+  integrity sha1-5HnICFjfDBsR3dppQPlgEfzaSpo=
+
+is-url@^1.2.2:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/is-url/-/is-url-1.2.4.tgz#04a4df46d28c4cff3d73d01ff06abeb318a1aa52"
+  integrity sha512-ITvGim8FhRiYe4IQ5uHSkj7pVaPDrCTkNd3yq3cV7iZAcJdHTUMPMEHcqSOy9xZ9qFenQCvi+2wjH9a1nXqHww==
+
+is-utf8@^0.2.0:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
+  integrity sha1-Sw2hRCEE0bM2NA6AeX6GXPOffXI=
+
+is-windows@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-0.2.0.tgz#de1aa6d63ea29dd248737b69f1ff8b8002d2108c"
+  integrity sha1-3hqm1j6indJIc3tp8f+LgALSEIw=
+
+is-windows@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.2.tgz#d1850eb9791ecd18e6182ce12a30f396634bb19d"
+  integrity sha512-eXK1UInq2bPmjyX6e3VHIzMLobc4J94i4AWn+Hpq3OU5KkrRC96OAcR3PRJ/pGu6m8TRnBHP9dkXQVsT/COVIA==
+
+is2@2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/is2/-/is2-2.0.1.tgz#8ac355644840921ce435d94f05d3a94634d3481a"
+  integrity sha512-+WaJvnaA7aJySz2q/8sLjMb2Mw14KTplHmSwcSpZ/fWJPkUmqw3YTzSWbPJ7OAwRvdYTWF2Wg+yYJ1AdP5Z8CA==
+  dependencies:
+    deep-is "^0.1.3"
+    ip-regex "^2.1.0"
+    is-url "^1.2.2"
+
+isarray@0.0.1:
+  version "0.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"
+  integrity sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=
+
+isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
+  integrity sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE=
+
+isarray@2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-2.0.1.tgz#a37d94ed9cda2d59865c9f76fe596ee1f338741e"
+  integrity sha1-o32U7ZzaLVmGXJ92/llu4fM4dB4=
+
+isbinaryfile@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/isbinaryfile/-/isbinaryfile-3.0.3.tgz#5d6def3edebf6e8ca8cae9c30183a804b5f8be80"
+  integrity sha512-8cJBL5tTd2OS0dM4jz07wQd5g0dCCqIhUxPIGtZfa5L6hWlvV5MHTITy/DBAsF+Oe2LS1X3krBUhNwaGUWpWxw==
+  dependencies:
+    buffer-alloc "^1.2.0"
+
+isexe@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/isexe/-/isexe-2.0.0.tgz#e8fbf374dc556ff8947a10dcb0572d633f2cfa10"
+  integrity sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=
+
+isobject@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/isobject/-/isobject-2.1.0.tgz#f065561096a3f1da2ef46272f815c840d87e0c89"
+  integrity sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=
+  dependencies:
+    isarray "1.0.0"
+
+isobject@^3.0.0, isobject@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/isobject/-/isobject-3.0.1.tgz#4e431e92b11a9731636aa1f9c8d1ccbcfdab78df"
+  integrity sha1-TkMekrEalzFjaqH5yNHMvP2reN8=
+
+isstream@~0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
+  integrity sha1-R+Y/evVa+m+S4VAOaQ64uFKcCZo=
+
+istanbul-lib-coverage@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.1.tgz#2aee0e073ad8c5f6a0b00e0dfbf52b4667472eda"
+  integrity sha512-nPvSZsVlbG9aLhZYaC3Oi1gT/tpyo3Yt5fNyf6NmcKIayz4VV/txxJFFKAK/gU4dcNn8ehsanBbVHVl0+amOLA==
+
+istanbul-lib-instrument@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/istanbul-lib-instrument/-/istanbul-lib-instrument-3.0.0.tgz#b5f066b2a161f75788be17a9d556f40a0cf2afc9"
+  integrity sha512-eQY9vN9elYjdgN9Iv6NS/00bptm02EBBk70lRMaVjeA6QYocQgenVrSgC28TJurdnZa80AGO3ASdFN+w/njGiQ==
+  dependencies:
+    "@babel/generator" "^7.0.0"
+    "@babel/parser" "^7.0.0"
+    "@babel/template" "^7.0.0"
+    "@babel/traverse" "^7.0.0"
+    "@babel/types" "^7.0.0"
+    istanbul-lib-coverage "^2.0.1"
+    semver "^5.5.0"
+
+istanbul@^0.4.0:
+  version "0.4.5"
+  resolved "https://registry.yarnpkg.com/istanbul/-/istanbul-0.4.5.tgz#65c7d73d4c4da84d4f3ac310b918fb0b8033733b"
+  integrity sha1-ZcfXPUxNqE1POsMQuRj7C4Azczs=
+  dependencies:
+    abbrev "1.0.x"
+    async "1.x"
+    escodegen "1.8.x"
+    esprima "2.7.x"
+    glob "^5.0.15"
+    handlebars "^4.0.1"
+    js-yaml "3.x"
+    mkdirp "0.5.x"
+    nopt "3.x"
+    once "1.x"
+    resolve "1.1.x"
+    supports-color "^3.1.0"
+    which "^1.1.1"
+    wordwrap "^1.0.0"
+
+jasmine-core@^2.99.0, jasmine-core@~2.99.0:
+  version "2.99.1"
+  resolved "https://registry.yarnpkg.com/jasmine-core/-/jasmine-core-2.99.1.tgz#e6400df1e6b56e130b61c4bcd093daa7f6e8ca15"
+  integrity sha1-5kAN8ea1bhMLYcS80JPap/boyhU=
+
+jasmine@^2.99.0:
+  version "2.99.0"
+  resolved "https://registry.yarnpkg.com/jasmine/-/jasmine-2.99.0.tgz#8ca72d102e639b867c6489856e0e18a9c7aa42b7"
+  integrity sha1-jKctEC5jm4Z8ZImFbg4YqceqQrc=
+  dependencies:
+    exit "^0.1.2"
+    glob "^7.0.6"
+    jasmine-core "~2.99.0"
+
+jest-get-type@^22.1.0:
+  version "22.4.3"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-22.4.3.tgz#e3a8504d8479342dd4420236b322869f18900ce4"
+  integrity sha512-/jsz0Y+V29w1chdXVygEKSz2nBoHoYqNShPe+QgxSNjAuP1i8+k4LbQNrfoliKej0P45sivkSCh7yiD6ubHS3w==
+
+jest-validate@^23.5.0:
+  version "23.6.0"
+  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-23.6.0.tgz#36761f99d1ed33fcd425b4e4c5595d62b6597474"
+  integrity sha512-OFKapYxe72yz7agrDAWi8v2WL8GIfVqcbKRCLbRG9PAxtzF9b1SEDdTpytNDN12z2fJynoBwpMpvj2R39plI2A==
+  dependencies:
+    chalk "^2.0.1"
+    jest-get-type "^22.1.0"
+    leven "^2.1.0"
+    pretty-format "^23.6.0"
+
+js-levenshtein@^1.1.3:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/js-levenshtein/-/js-levenshtein-1.1.4.tgz#3a56e3cbf589ca0081eb22cd9ba0b1290a16d26e"
+  integrity sha512-PxfGzSs0ztShKrUYPIn5r0MtyAhYcCwmndozzpz8YObbPnD1jFxzlBGbRnX2mIu6Z13xN6+PTu05TQFnZFlzow==
+
+"js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
+  integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
+
+js-tokens@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
+  integrity sha1-mGbfOVECEw449/mWvOtlRDIJwls=
+
+js-yaml@3.x, js-yaml@^3.12.0, js-yaml@^3.9.0:
+  version "3.13.1"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
+  integrity sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
+jsbn@~0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
+  integrity sha1-peZUwuWi3rXyAdls77yoDA7y9RM=
+
+jsesc@^2.5.1:
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-2.5.2.tgz#80564d2e483dacf6e8ef209650a67df3f0c283a4"
+  integrity sha512-OYu7XEzjkCQ3C5Ps3QIZsQfNpqoJyZZA99wd9aWd05NCtC5pWOkShK2mkL6HXQR6/Cy2lbNdPlZBpuQHXE63gA==
+
+jsesc@~0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
+  integrity sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=
+
+json-parse-better-errors@^1.0.1, json-parse-better-errors@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz#bb867cfb3450e69107c131d1c514bab3dc8bcaa9"
+  integrity sha512-mrqyZKfX5EhL7hvqcV6WG1yYjnjeuYDzDhhcAAUrq8Po85NBQBJP+ZDUT75qZQ98IkUoBqdkExkukOU7Ts2wrw==
+
+json-schema-traverse@^0.4.1:
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz#69f6a87d9513ab8bb8fe63bdb0979c448e684660"
+  integrity sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==
+
+json-schema@0.2.3:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/json-schema/-/json-schema-0.2.3.tgz#b480c892e59a2f05954ce727bd3f2a4e882f9e13"
+  integrity sha1-tIDIkuWaLwWVTOcnvT8qTogvnhM=
+
+json-stable-stringify-without-jsonify@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json-stable-stringify-without-jsonify/-/json-stable-stringify-without-jsonify-1.0.1.tgz#9db7b59496ad3f3cfef30a75142d2d930ad72651"
+  integrity sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=
+
+json-stringify-safe@^5.0.1, json-stringify-safe@~5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"
+  integrity sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus=
+
+json3@3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/json3/-/json3-3.3.2.tgz#3c0434743df93e2f5c42aee7b19bcb483575f4e1"
+  integrity sha1-PAQ0dD35Pi9cQq7nsZvLSDV19OE=
+
+json5@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-1.0.1.tgz#779fb0018604fa854eacbf6252180d83543e3dbe"
+  integrity sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==
+  dependencies:
+    minimist "^1.2.0"
+
+json5@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/json5/-/json5-2.1.0.tgz#e7a0c62c48285c628d20a10b85c89bb807c32850"
+  integrity sha512-8Mh9h6xViijj36g7Dxi+Y4S6hNGV96vcJZr/SrlHh1LR/pEn/8j/+qIBbs44YKl69Lrfctp4QD+AdWLTMqEZAQ==
+  dependencies:
+    minimist "^1.2.0"
+
+jsonfile@^2.1.0:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-2.4.0.tgz#3736a2b428b87bbda0cc83b53fa3d633a35c2ae8"
+  integrity sha1-NzaitCi4e72gzIO1P6PWM6NcKug=
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
+jsonparse@^1.2.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/jsonparse/-/jsonparse-1.3.1.tgz#3f4dae4a91fac315f71062f8521cc239f1366280"
+  integrity sha1-P02uSpH6wxX3EGL4UhzCOfE2YoA=
+
+jsprim@^1.2.2:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
+  integrity sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=
+  dependencies:
+    assert-plus "1.0.0"
+    extsprintf "1.3.0"
+    json-schema "0.2.3"
+    verror "1.10.0"
+
+jszip@^3.1.3:
+  version "3.1.5"
+  resolved "https://registry.yarnpkg.com/jszip/-/jszip-3.1.5.tgz#e3c2a6c6d706ac6e603314036d43cd40beefdf37"
+  integrity sha512-5W8NUaFRFRqTOL7ZDDrx5qWHJyBXy6velVudIzQUSoqAAYqzSh2Z7/m0Rf1QbmQJccegD0r+YZxBjzqoBiEeJQ==
+  dependencies:
+    core-js "~2.3.0"
+    es6-promise "~3.0.2"
+    lie "~3.1.0"
+    pako "~1.0.2"
+    readable-stream "~2.0.6"
+
+karma-chrome-launcher@^2.1.1:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/karma-chrome-launcher/-/karma-chrome-launcher-2.2.0.tgz#cf1b9d07136cc18fe239327d24654c3dbc368acf"
+  integrity sha512-uf/ZVpAabDBPvdPdveyk1EPgbnloPvFFGgmRhYLTDH7gEB4nZdSBk8yTU47w1g/drLSx5uMOkjKk7IWKfWg/+w==
+  dependencies:
+    fs-access "^1.0.0"
+    which "^1.2.1"
+
+karma-coverage@^1.1.1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/karma-coverage/-/karma-coverage-1.1.2.tgz#cc09dceb589a83101aca5fe70c287645ef387689"
+  integrity sha512-eQawj4Cl3z/CjxslYy9ariU4uDh7cCNFZHNWXWRpl0pNeblY/4wHR7M7boTYXWrn9bY0z2pZmr11eKje/S/hIw==
+  dependencies:
+    dateformat "^1.0.6"
+    istanbul "^0.4.0"
+    lodash "^4.17.0"
+    minimatch "^3.0.0"
+    source-map "^0.5.1"
+
+karma-firefox-launcher@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/karma-firefox-launcher/-/karma-firefox-launcher-1.1.0.tgz#2c47030452f04531eb7d13d4fc7669630bb93339"
+  integrity sha512-LbZ5/XlIXLeQ3cqnCbYLn+rOVhuMIK9aZwlP6eOLGzWdo1UVp7t6CN3DP4SafiRLjexKwHeKHDm0c38Mtd3VxA==
+
+karma-jasmine@^1.1.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/karma-jasmine/-/karma-jasmine-1.1.2.tgz#394f2b25ffb4a644b9ada6f22d443e2fd08886c3"
+  integrity sha1-OU8rJf+0pkS5rabyLUQ+L9CIhsM=
+
+karma-mocha-reporter@^2.2.3:
+  version "2.2.5"
+  resolved "https://registry.yarnpkg.com/karma-mocha-reporter/-/karma-mocha-reporter-2.2.5.tgz#15120095e8ed819186e47a0b012f3cd741895560"
+  integrity sha1-FRIAlejtgZGG5HoLAS8810GJVWA=
+  dependencies:
+    chalk "^2.1.0"
+    log-symbols "^2.1.0"
+    strip-ansi "^4.0.0"
+
+karma-phantomjs-launcher@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/karma-phantomjs-launcher/-/karma-phantomjs-launcher-1.0.4.tgz#d23ca34801bda9863ad318e3bb4bd4062b13acd2"
+  integrity sha1-0jyjSAG9qYY60xjju0vUBisTrNI=
+  dependencies:
+    lodash "^4.0.1"
+    phantomjs-prebuilt "^2.1.7"
+
+karma-safari-launcher@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/karma-safari-launcher/-/karma-safari-launcher-1.0.0.tgz#96982a2cc47d066aae71c553babb28319115a2ce"
+  integrity sha1-lpgqLMR9BmquccVTursoMZEVos4=
+
+karma-sauce-launcher@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/karma-sauce-launcher/-/karma-sauce-launcher-2.0.2.tgz#dbf98e70d86bf287b03a537cf637eb7aefa975c3"
+  integrity sha512-jLUFaJhHMcKpxFWUesyWYihzM5FvQiJsDwGcCtKeOy2lsWhkVw0V0Byqb1d+wU6myU1mribBtsIcub23HS4kWA==
+  dependencies:
+    sauce-connect-launcher "^1.2.4"
+    saucelabs "^1.5.0"
+    selenium-webdriver "^4.0.0-alpha.1"
+
+karma-sourcemap-loader@^0.3.7:
+  version "0.3.7"
+  resolved "https://registry.yarnpkg.com/karma-sourcemap-loader/-/karma-sourcemap-loader-0.3.7.tgz#91322c77f8f13d46fed062b042e1009d4c4505d8"
+  integrity sha1-kTIsd/jxPUb+0GKwQuEAnUxFBdg=
+  dependencies:
+    graceful-fs "^4.1.2"
+
+karma-webpack@^4.0.0-rc.2:
+  version "4.0.0-rc.5"
+  resolved "https://registry.yarnpkg.com/karma-webpack/-/karma-webpack-4.0.0-rc.5.tgz#7282945c9af56d9fc6e0bb053df9afc73dae1b15"
+  integrity sha512-JCFLWIpX1Yx/pX086/2K+c1QdsPQI3K4HVcCo4QzYPWvu7rHOHMV2d3YYVMqL1mZd7iqFlcU8vBO8xKH4CpTyg==
+  dependencies:
+    async "^2.0.0"
+    loader-utils "^1.1.0"
+    source-map "^0.5.6"
+    webpack-dev-middleware "^3.2.0"
+
+karma@^3.1.1:
+  version "3.1.4"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-3.1.4.tgz#3890ca9722b10d1d14b726e1335931455788499e"
+  integrity sha512-31Vo8Qr5glN+dZEVIpnPCxEGleqE0EY6CtC2X9TagRV3rRQ3SNrvfhddICkJgUK3AgqpeKSZau03QumTGhGoSw==
+  dependencies:
+    bluebird "^3.3.0"
+    body-parser "^1.16.1"
+    chokidar "^2.0.3"
+    colors "^1.1.0"
+    combine-lists "^1.0.0"
+    connect "^3.6.0"
+    core-js "^2.2.0"
+    di "^0.0.1"
+    dom-serialize "^2.2.0"
+    expand-braces "^0.1.1"
+    flatted "^2.0.0"
+    glob "^7.1.1"
+    graceful-fs "^4.1.2"
+    http-proxy "^1.13.0"
+    isbinaryfile "^3.0.0"
+    lodash "^4.17.5"
+    log4js "^3.0.0"
+    mime "^2.3.1"
+    minimatch "^3.0.2"
+    optimist "^0.6.1"
+    qjobs "^1.1.4"
+    range-parser "^1.2.0"
+    rimraf "^2.6.0"
+    safe-buffer "^5.0.1"
+    socket.io "2.1.1"
+    source-map "^0.6.1"
+    tmp "0.0.33"
+    useragent "2.3.0"
+
+kew@^0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/kew/-/kew-0.7.0.tgz#79d93d2d33363d6fdd2970b335d9141ad591d79b"
+  integrity sha1-edk9LTM2PW/dKXCzNdkUGtWR15s=
+
+kind-of@^3.0.2, kind-of@^3.0.3, kind-of@^3.2.0:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-3.2.2.tgz#31ea21a734bab9bbb0f32466d893aea51e4a3c64"
+  integrity sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=
+  dependencies:
+    is-buffer "^1.1.5"
+
+kind-of@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-4.0.0.tgz#20813df3d712928b207378691a45066fae72dd57"
+  integrity sha1-IIE989cSkosgc3hpGkUGb65y3Vc=
+  dependencies:
+    is-buffer "^1.1.5"
+
+kind-of@^5.0.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-5.1.0.tgz#729c91e2d857b7a419a1f9aa65685c4c33f5845d"
+  integrity sha512-NGEErnH6F2vUuXDh+OlbcKW7/wOcfdRHaZ7VWtqCztfHri/++YKmP51OdWeGPuqCOba6kk2OTe5d02VmTB80Pw==
+
+kind-of@^6.0.0, kind-of@^6.0.2:
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.2.tgz#01146b36a6218e64e58f3a8d66de5d7fc6f6d051"
+  integrity sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==
+
+klaw@^1.0.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/klaw/-/klaw-1.3.1.tgz#4088433b46b3b1ba259d78785d8e96f73ba02439"
+  integrity sha1-QIhDO0azsbolnXh4XY6W9zugJDk=
+  optionalDependencies:
+    graceful-fs "^4.1.9"
+
+leven@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/leven/-/leven-2.1.0.tgz#c2e7a9f772094dee9d34202ae8acce4687875580"
+  integrity sha1-wuep93IJTe6dNCAq6KzORoeHVYA=
+
+levn@^0.3.0, levn@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
+  integrity sha1-OwmSTt+fCDwEkP3UwLxEIeBHZO4=
+  dependencies:
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+
+lie@~3.1.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/lie/-/lie-3.1.1.tgz#9a436b2cc7746ca59de7a41fa469b3efb76bd87e"
+  integrity sha1-mkNrLMd0bKWd56QfpGmz77dr2H4=
+  dependencies:
+    immediate "~3.0.5"
+
+lint-staged@^8.0.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/lint-staged/-/lint-staged-8.1.0.tgz#dbc3ae2565366d8f20efb9f9799d076da64863f2"
+  integrity sha512-yfSkyJy7EuVsaoxtUSEhrD81spdJOe/gMTGea3XaV7HyoRhTb9Gdlp6/JppRZERvKSEYXP9bjcmq6CA5oL2lYQ==
+  dependencies:
+    "@iamstarkov/listr-update-renderer" "0.4.1"
+    chalk "^2.3.1"
+    commander "^2.14.1"
+    cosmiconfig "5.0.6"
+    debug "^3.1.0"
+    dedent "^0.7.0"
+    del "^3.0.0"
+    execa "^1.0.0"
+    find-parent-dir "^0.3.0"
+    g-status "^2.0.2"
+    is-glob "^4.0.0"
+    is-windows "^1.0.2"
+    jest-validate "^23.5.0"
+    listr "^0.14.2"
+    lodash "^4.17.5"
+    log-symbols "^2.2.0"
+    micromatch "^3.1.8"
+    npm-which "^3.0.1"
+    p-map "^1.1.1"
+    path-is-inside "^1.0.2"
+    pify "^3.0.0"
+    please-upgrade-node "^3.0.2"
+    staged-git-files "1.1.2"
+    string-argv "^0.0.2"
+    stringify-object "^3.2.2"
+
+listr-silent-renderer@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/listr-silent-renderer/-/listr-silent-renderer-1.1.1.tgz#924b5a3757153770bf1a8e3fbf74b8bbf3f9242e"
+  integrity sha1-kktaN1cVN3C/Go4/v3S4u/P5JC4=
+
+listr-update-renderer@^0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/listr-update-renderer/-/listr-update-renderer-0.5.0.tgz#4ea8368548a7b8aecb7e06d8c95cb45ae2ede6a2"
+  integrity sha512-tKRsZpKz8GSGqoI/+caPmfrypiaq+OQCbd+CovEC24uk1h952lVj5sC7SqyFUm+OaJ5HN/a1YLt5cit2FMNsFA==
+  dependencies:
+    chalk "^1.1.3"
+    cli-truncate "^0.2.1"
+    elegant-spinner "^1.0.1"
+    figures "^1.7.0"
+    indent-string "^3.0.0"
+    log-symbols "^1.0.2"
+    log-update "^2.3.0"
+    strip-ansi "^3.0.1"
+
+listr-verbose-renderer@^0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/listr-verbose-renderer/-/listr-verbose-renderer-0.5.0.tgz#f1132167535ea4c1261102b9f28dac7cba1e03db"
+  integrity sha512-04PDPqSlsqIOaaaGZ+41vq5FejI9auqTInicFRndCBgE3bXG8D6W1I+mWhk+1nqbHmyhla/6BUrd5OSiHwKRXw==
+  dependencies:
+    chalk "^2.4.1"
+    cli-cursor "^2.1.0"
+    date-fns "^1.27.2"
+    figures "^2.0.0"
+
+listr@^0.14.2:
+  version "0.14.3"
+  resolved "https://registry.yarnpkg.com/listr/-/listr-0.14.3.tgz#2fea909604e434be464c50bddba0d496928fa586"
+  integrity sha512-RmAl7su35BFd/xoMamRjpIE4j3v+L28o8CT5YhAXQJm1fD+1l9ngXY8JAQRJ+tFK2i5njvi0iRUKV09vPwA0iA==
+  dependencies:
+    "@samverschueren/stream-to-observable" "^0.3.0"
+    is-observable "^1.1.0"
+    is-promise "^2.1.0"
+    is-stream "^1.1.0"
+    listr-silent-renderer "^1.1.1"
+    listr-update-renderer "^0.5.0"
+    listr-verbose-renderer "^0.5.0"
+    p-map "^2.0.0"
+    rxjs "^6.3.3"
+
+load-json-file@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-1.1.0.tgz#956905708d58b4bab4c2261b04f59f31c99374c0"
+  integrity sha1-lWkFcI1YtLq0wiYbBPWfMcmTdMA=
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^2.2.0"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+    strip-bom "^2.0.0"
+
+load-json-file@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-4.0.0.tgz#2f5f45ab91e33216234fd53adab668eb4ec0993b"
+  integrity sha1-L19Fq5HjMhYjT9U62rZo607AmTs=
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^4.0.0"
+    pify "^3.0.0"
+    strip-bom "^3.0.0"
+
+loader-runner@^2.3.0:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/loader-runner/-/loader-runner-2.3.1.tgz#026f12fe7c3115992896ac02ba022ba92971b979"
+  integrity sha512-By6ZFY7ETWOc9RFaAIb23IjJVcM4dvJC/N57nmdz9RSkMXvAXGI7SyVlAw3v8vjtDRlqThgVDVmTnr9fqMlxkw==
+
+loader-utils@^1.0.2, loader-utils@^1.1.0:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-1.2.3.tgz#1ff5dc6911c9f0a062531a4c04b609406108c2c7"
+  integrity sha512-fkpz8ejdnEMG3s37wGL07iSBDg99O9D5yflE9RGNH3hRdx9SOwYfnGYdZOUIZitN8E+E2vkq3MUMYMvPYl5ZZA==
+  dependencies:
+    big.js "^5.2.2"
+    emojis-list "^2.0.0"
+    json5 "^1.0.1"
+
+locate-path@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-2.0.0.tgz#2b568b265eec944c6d9c0de9c3dbbbca0354cd8e"
+  integrity sha1-K1aLJl7slExtnA3pw9u7ygNUzY4=
+  dependencies:
+    p-locate "^2.0.0"
+    path-exists "^3.0.0"
+
+locate-path@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-3.0.0.tgz#dbec3b3ab759758071b58fe59fc41871af21400e"
+  integrity sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==
+  dependencies:
+    p-locate "^3.0.0"
+    path-exists "^3.0.0"
+
+lodash._arraycopy@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/lodash._arraycopy/-/lodash._arraycopy-3.0.0.tgz#76e7b7c1f1fb92547374878a562ed06a3e50f6e1"
+  integrity sha1-due3wfH7klRzdIeKVi7Qaj5Q9uE=
+
+lodash._arrayeach@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/lodash._arrayeach/-/lodash._arrayeach-3.0.0.tgz#bab156b2a90d3f1bbd5c653403349e5e5933ef9e"
+  integrity sha1-urFWsqkNPxu9XGU0AzSeXlkz754=
+
+lodash._baseassign@^3.0.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
+  integrity sha1-jDigmVAPIVrQnlnxci/QxSv+Ck4=
+  dependencies:
+    lodash._basecopy "^3.0.0"
+    lodash.keys "^3.0.0"
+
+lodash._baseclone@^3.0.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/lodash._baseclone/-/lodash._baseclone-3.3.0.tgz#303519bf6393fe7e42f34d8b630ef7794e3542b7"
+  integrity sha1-MDUZv2OT/n5C802LYw73eU41Qrc=
+  dependencies:
+    lodash._arraycopy "^3.0.0"
+    lodash._arrayeach "^3.0.0"
+    lodash._baseassign "^3.0.0"
+    lodash._basefor "^3.0.0"
+    lodash.isarray "^3.0.0"
+    lodash.keys "^3.0.0"
+
+lodash._baseclone@^4.0.0:
+  version "4.5.7"
+  resolved "https://registry.yarnpkg.com/lodash._baseclone/-/lodash._baseclone-4.5.7.tgz#ce42ade08384ef5d62fa77c30f61a46e686f8434"
+  integrity sha1-zkKt4IOE711i+nfDD2GkbmhvhDQ=
+
+lodash._basecopy@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/lodash._basecopy/-/lodash._basecopy-3.0.1.tgz#8da0e6a876cf344c0ad8a54882111dd3c5c7ca36"
+  integrity sha1-jaDmqHbPNEwK2KVIghEd08XHyjY=
+
+lodash._basecreate@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash._basecreate/-/lodash._basecreate-3.0.3.tgz#1bc661614daa7fc311b7d03bf16806a0213cf821"
+  integrity sha1-G8ZhYU2qf8MRt9A78WgGoCE8+CE=
+
+lodash._basefor@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash._basefor/-/lodash._basefor-3.0.3.tgz#7550b4e9218ef09fad24343b612021c79b4c20c2"
+  integrity sha1-dVC06SGO8J+tJDQ7YSAhx5tMIMI=
+
+lodash._bindcallback@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/lodash._bindcallback/-/lodash._bindcallback-3.0.1.tgz#e531c27644cf8b57a99e17ed95b35c748789392e"
+  integrity sha1-5THCdkTPi1epnhftlbNcdIeJOS4=
+
+lodash._getnative@^3.0.0:
+  version "3.9.1"
+  resolved "https://registry.yarnpkg.com/lodash._getnative/-/lodash._getnative-3.9.1.tgz#570bc7dede46d61cdcde687d65d3eecbaa3aaff5"
+  integrity sha1-VwvH3t5G1hzc3mh9ZdPuy6o6r/U=
+
+lodash._isiterateecall@^3.0.0:
+  version "3.0.9"
+  resolved "https://registry.yarnpkg.com/lodash._isiterateecall/-/lodash._isiterateecall-3.0.9.tgz#5203ad7ba425fae842460e696db9cf3e6aac057c"
+  integrity sha1-UgOte6Ql+uhCRg5pbbnPPmqsBXw=
+
+lodash._reinterpolate@^3.0.0, lodash._reinterpolate@~3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/lodash._reinterpolate/-/lodash._reinterpolate-3.0.0.tgz#0ccf2d89166af03b3663c796538b75ac6e114d9d"
+  integrity sha1-DM8tiRZq8Ds2Y8eWU4t1rG4RTZ0=
+
+lodash._stack@^4.0.0:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/lodash._stack/-/lodash._stack-4.1.3.tgz#751aa76c1b964b047e76d14fc72a093fcb5e2dd0"
+  integrity sha1-dRqnbBuWSwR+dtFPxyoJP8teLdA=
+
+lodash.clone@3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.clone/-/lodash.clone-3.0.3.tgz#84688c73d32b5a90ca25616963f189252a997043"
+  integrity sha1-hGiMc9MrWpDKJWFpY/GJJSqZcEM=
+  dependencies:
+    lodash._baseclone "^3.0.0"
+    lodash._bindcallback "^3.0.0"
+    lodash._isiterateecall "^3.0.0"
+
+lodash.create@3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/lodash.create/-/lodash.create-3.1.1.tgz#d7f2849f0dbda7e04682bb8cd72ab022461debe7"
+  integrity sha1-1/KEnw29p+BGgruM1yqwIkYd6+c=
+  dependencies:
+    lodash._baseassign "^3.0.0"
+    lodash._basecreate "^3.0.0"
+    lodash._isiterateecall "^3.0.0"
+
+lodash.debounce@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/lodash.debounce/-/lodash.debounce-4.0.8.tgz#82d79bff30a67c4005ffd5e2515300ad9ca4d7af"
+  integrity sha1-gteb/zCmfEAF/9XiUVMArZyk168=
+
+lodash.defaultsdeep@4.3.2:
+  version "4.3.2"
+  resolved "https://registry.yarnpkg.com/lodash.defaultsdeep/-/lodash.defaultsdeep-4.3.2.tgz#6c1a586e6c5647b0e64e2d798141b8836158be8a"
+  integrity sha1-bBpYbmxWR7DmTi15gUG4g2FYvoo=
+  dependencies:
+    lodash._baseclone "^4.0.0"
+    lodash._stack "^4.0.0"
+    lodash.isplainobject "^4.0.0"
+    lodash.keysin "^4.0.0"
+    lodash.mergewith "^4.0.0"
+    lodash.rest "^4.0.0"
+
+lodash.isarguments@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/lodash.isarguments/-/lodash.isarguments-3.1.0.tgz#2f573d85c6a24289ff00663b491c1d338ff3458a"
+  integrity sha1-L1c9hcaiQon/AGY7SRwdM4/zRYo=
+
+lodash.isarray@^3.0.0:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/lodash.isarray/-/lodash.isarray-3.0.4.tgz#79e4eb88c36a8122af86f844aa9bcd851b5fbb55"
+  integrity sha1-eeTriMNqgSKvhvhEqpvNhRtfu1U=
+
+lodash.isplainobject@^4.0.0:
+  version "4.0.6"
+  resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
+  integrity sha1-fFJqUtibRcRcxpC4gWO+BJf1UMs=
+
+lodash.keys@^3.0.0:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/lodash.keys/-/lodash.keys-3.1.2.tgz#4dbc0472b156be50a0b286855d1bd0b0c656098a"
+  integrity sha1-TbwEcrFWvlCgsoaFXRvQsMZWCYo=
+  dependencies:
+    lodash._getnative "^3.0.0"
+    lodash.isarguments "^3.0.0"
+    lodash.isarray "^3.0.0"
+
+lodash.keysin@^4.0.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/lodash.keysin/-/lodash.keysin-4.2.0.tgz#8cc3fb35c2d94acc443a1863e02fa40799ea6f28"
+  integrity sha1-jMP7NcLZSsxEOhhj4C+kB5nqbyg=
+
+lodash.map@^4.5.1:
+  version "4.6.0"
+  resolved "https://registry.yarnpkg.com/lodash.map/-/lodash.map-4.6.0.tgz#771ec7839e3473d9c4cde28b19394c3562f4f6d3"
+  integrity sha1-dx7Hg540c9nEzeKLGTlMNWL09tM=
+
+lodash.mergewith@^4.0.0:
+  version "4.6.1"
+  resolved "https://registry.yarnpkg.com/lodash.mergewith/-/lodash.mergewith-4.6.1.tgz#639057e726c3afbdb3e7d42741caa8d6e4335927"
+  integrity sha512-eWw5r+PYICtEBgrBE5hhlT6aAa75f411bgDz/ZL2KZqYV03USvucsxcHUIlGTDTECs1eunpI7HOV7U+WLDvNdQ==
+
+lodash.rest@^4.0.0:
+  version "4.0.5"
+  resolved "https://registry.yarnpkg.com/lodash.rest/-/lodash.rest-4.0.5.tgz#954ef75049262038c96d1fc98b28fdaf9f0772aa"
+  integrity sha1-lU73UEkmIDjJbR/Jiyj9r58Hcqo=
+
+lodash.template@^4.0.2, lodash.template@^4.4.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.template/-/lodash.template-4.5.0.tgz#f976195cf3f347d0d5f52483569fe8031ccce8ab"
+  integrity sha512-84vYFxIkmidUiFxidA/KjjH9pAycqW+h980j7Fuz5qxRtO9pgB7MDFTdys1N7A5mcucRiDyEq4fusljItR1T/A==
+  dependencies:
+    lodash._reinterpolate "^3.0.0"
+    lodash.templatesettings "^4.0.0"
+
+lodash.templatesettings@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/lodash.templatesettings/-/lodash.templatesettings-4.1.0.tgz#2b4d4e95ba440d915ff08bc899e4553666713316"
+  integrity sha1-K01OlbpEDZFf8IvImeRVNmZxMxY=
+  dependencies:
+    lodash._reinterpolate "~3.0.0"
+
+lodash.uniq@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
+  integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
+
+lodash@4.17.5:
+  version "4.17.5"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
+  integrity sha512-svL3uiZf1RwhH+cWrfZn3A4+U58wbP0tGVTLQPbjplZxZ8ROD9VLuNgsRniTlLe7OlSqR79RUehXgpBW/s0IQw==
+
+lodash@^4.0.1, lodash@^4.16.6, lodash@^4.17.0, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@^4.3.0, lodash@^4.5.0:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
+
+log-symbols@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-1.0.2.tgz#376ff7b58ea3086a0f09facc74617eca501e1a18"
+  integrity sha1-N2/3tY6jCGoPCfrMdGF+ylAeGhg=
+  dependencies:
+    chalk "^1.0.0"
+
+log-symbols@^2.1.0, log-symbols@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-2.2.0.tgz#5740e1c5d6f0dfda4ad9323b5332107ef6b4c40a"
+  integrity sha512-VeIAFslyIerEJLXHziedo2basKbMKtTw3vfn5IzG0XTjhAVEJyNHnL2p7vc+wBDSdQuUpNw3M2u6xb9QsAY5Eg==
+  dependencies:
+    chalk "^2.0.1"
+
+log-update@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/log-update/-/log-update-2.3.0.tgz#88328fd7d1ce7938b29283746f0b1bc126b24708"
+  integrity sha1-iDKP19HOeTiykoN0bwsbwSayRwg=
+  dependencies:
+    ansi-escapes "^3.0.0"
+    cli-cursor "^2.0.0"
+    wrap-ansi "^3.0.1"
+
+log4js@^3.0.0:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/log4js/-/log4js-3.0.6.tgz#e6caced94967eeeb9ce399f9f8682a4b2b28c8ff"
+  integrity sha512-ezXZk6oPJCWL483zj64pNkMuY/NcRX5MPiB0zE6tjZM137aeusrOnW1ecxgF9cmwMWkBMhjteQxBPoZBh9FDxQ==
+  dependencies:
+    circular-json "^0.5.5"
+    date-format "^1.2.0"
+    debug "^3.1.0"
+    rfdc "^1.1.2"
+    streamroller "0.7.0"
+
+longest@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"
+  integrity sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=
+
+loose-envify@^1.0.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
+  integrity sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==
+  dependencies:
+    js-tokens "^3.0.0 || ^4.0.0"
+
+loud-rejection@^1.0.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/loud-rejection/-/loud-rejection-1.6.0.tgz#5b46f80147edee578870f086d04821cf998e551f"
+  integrity sha1-W0b4AUft7leIcPCG0Eghz5mOVR8=
+  dependencies:
+    currently-unhandled "^0.4.1"
+    signal-exit "^3.0.0"
+
+lru-cache@4.1.x, lru-cache@^4.0.1:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.5.tgz#8bbe50ea85bed59bc9e33dcab8235ee9bcf443cd"
+  integrity sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==
+  dependencies:
+    pseudomap "^1.0.2"
+    yallist "^2.1.2"
+
+lru-cache@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-5.1.1.tgz#1da27e6710271947695daf6848e847f01d84b920"
+  integrity sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==
+  dependencies:
+    yallist "^3.0.2"
+
+lru-cache@~2.6.5:
+  version "2.6.5"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.6.5.tgz#e56d6354148ede8d7707b58d143220fd08df0fd5"
+  integrity sha1-5W1jVBSO3o13B7WNFDIg/QjfD9U=
+
+magic-string@^0.16.0:
+  version "0.16.0"
+  resolved "https://registry.yarnpkg.com/magic-string/-/magic-string-0.16.0.tgz#970ebb0da7193301285fb1aa650f39bdd81eb45a"
+  integrity sha1-lw67DacZMwEoX7GqZQ85vdgetFo=
+  dependencies:
+    vlq "^0.2.1"
+
+magic-string@^0.25.1:
+  version "0.25.1"
+  resolved "https://registry.yarnpkg.com/magic-string/-/magic-string-0.25.1.tgz#b1c248b399cd7485da0fe7385c2fc7011843266e"
+  integrity sha512-sCuTz6pYom8Rlt4ISPFn6wuFodbKMIHUMv4Qko9P17dpxb7s52KJTmRuZZqHdGmLCK9AOcDare039nRIcfdkEg==
+  dependencies:
+    sourcemap-codec "^1.4.1"
+
+make-dir@^1.0.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.3.0.tgz#79c1033b80515bd6d24ec9933e860ca75ee27f0c"
+  integrity sha512-2w31R7SJtieJJnQtGc7RVL2StM2vGYVfqUOvUDxH6bC6aJTxPxTF0GnIgCyu7tjockiUWAYQRbxa7vKn34s5sQ==
+  dependencies:
+    pify "^3.0.0"
+
+map-cache@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/map-cache/-/map-cache-0.2.2.tgz#c32abd0bd6525d9b051645bb4f26ac5dc98a0dbf"
+  integrity sha1-wyq9C9ZSXZsFFkW7TyasXcmKDb8=
+
+map-obj@^1.0.0, map-obj@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-1.0.1.tgz#d933ceb9205d82bdcf4886f6742bdc2b4dea146d"
+  integrity sha1-2TPOuSBdgr3PSIb2dCvcK03qFG0=
+
+map-obj@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/map-obj/-/map-obj-2.0.0.tgz#a65cd29087a92598b8791257a523e021222ac1f9"
+  integrity sha1-plzSkIepJZi4eRJXpSPgISIqwfk=
+
+map-visit@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/map-visit/-/map-visit-1.0.0.tgz#ecdca8f13144e660f1b5bd41f12f3479d98dfb8f"
+  integrity sha1-7Nyo8TFE5mDxtb1B8S80edmN+48=
+  dependencies:
+    object-visit "^1.0.0"
+
+matcher@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/matcher/-/matcher-1.1.1.tgz#51d8301e138f840982b338b116bb0c09af62c1c2"
+  integrity sha512-+BmqxWIubKTRKNWx/ahnCkk3mG8m7OturVlqq6HiojGJTd5hVYbgZm6WzcYPCoB+KBT4Vd6R7WSRG2OADNaCjg==
+  dependencies:
+    escape-string-regexp "^1.0.4"
+
+math-random@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/math-random/-/math-random-1.0.1.tgz#8b3aac588b8a66e4975e3cdea67f7bb329601fac"
+  integrity sha1-izqsWIuKZuSXXjzepn97sylgH6w=
+
+md5.js@^1.3.4:
+  version "1.3.5"
+  resolved "https://registry.yarnpkg.com/md5.js/-/md5.js-1.3.5.tgz#b5d07b8e3216e3e27cd728d72f70d1e6a342005f"
+  integrity sha512-xitP+WxNPcTTOgnTJcrhM0xvdPepipPSf3I8EIpGKeFLjt3PlJLIDG3u8EX53ZIubkb+5U2+3rELYpEhHhzdkg==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+    safe-buffer "^5.1.2"
+
+media-typer@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"
+  integrity sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g=
+
+memory-fs@^0.4.0, memory-fs@~0.4.1:
+  version "0.4.1"
+  resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.4.1.tgz#3a9a20b8462523e447cfbc7e8bb80ed667bfc552"
+  integrity sha1-OpoguEYlI+RHz7x+i7gO1me/xVI=
+  dependencies:
+    errno "^0.1.3"
+    readable-stream "^2.0.1"
+
+meow@^3.3.0:
+  version "3.7.0"
+  resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
+  integrity sha1-cstmi0JSKCkKu/qFaJJYcwioAfs=
+  dependencies:
+    camelcase-keys "^2.0.0"
+    decamelize "^1.1.2"
+    loud-rejection "^1.0.0"
+    map-obj "^1.0.1"
+    minimist "^1.1.3"
+    normalize-package-data "^2.3.4"
+    object-assign "^4.0.1"
+    read-pkg-up "^1.0.1"
+    redent "^1.0.0"
+    trim-newlines "^1.0.0"
+
+meow@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/meow/-/meow-4.0.1.tgz#d48598f6f4b1472f35bf6317a95945ace347f975"
+  integrity sha512-xcSBHD5Z86zaOc+781KrupuHAzeGXSLtiAOmBsiLDiPSaYSB6hdew2ng9EBAnZ62jagG9MHAOdxpDi/lWBFJ/A==
+  dependencies:
+    camelcase-keys "^4.0.0"
+    decamelize-keys "^1.0.0"
+    loud-rejection "^1.0.0"
+    minimist "^1.1.3"
+    minimist-options "^3.0.1"
+    normalize-package-data "^2.3.4"
+    read-pkg-up "^3.0.0"
+    redent "^2.0.0"
+    trim-newlines "^2.0.0"
+
+merge@^1.2.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/merge/-/merge-1.2.1.tgz#38bebf80c3220a8a487b6fcfb3941bb11720c145"
+  integrity sha512-VjFo4P5Whtj4vsLzsYBu5ayHhoHJ0UqNm7ibvShmbmoz7tGi0vXaoJbGdB+GmDMLUdg8DpQXEIeVDAe8MaABvQ==
+
+micromatch@^2.3.11, micromatch@^2.3.7:
+  version "2.3.11"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-2.3.11.tgz#86677c97d1720b363431d04d0d15293bd38c1565"
+  integrity sha1-hmd8l9FyCzY0MdBNDRUpO9OMFWU=
+  dependencies:
+    arr-diff "^2.0.0"
+    array-unique "^0.2.1"
+    braces "^1.8.2"
+    expand-brackets "^0.1.4"
+    extglob "^0.3.1"
+    filename-regex "^2.0.0"
+    is-extglob "^1.0.0"
+    is-glob "^2.0.1"
+    kind-of "^3.0.2"
+    normalize-path "^2.0.1"
+    object.omit "^2.0.0"
+    parse-glob "^3.0.4"
+    regex-cache "^0.4.2"
+
+micromatch@^3.1.10, micromatch@^3.1.4, micromatch@^3.1.8:
+  version "3.1.10"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-3.1.10.tgz#70859bc95c9840952f359a068a3fc49f9ecfac23"
+  integrity sha512-MWikgl9n9M3w+bpsY3He8L+w9eF9338xRl8IAO5viDizwSzziFEyUzo2xrrloB64ADbTf8uA8vRqqttDTOmccg==
+  dependencies:
+    arr-diff "^4.0.0"
+    array-unique "^0.3.2"
+    braces "^2.3.1"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    extglob "^2.0.4"
+    fragment-cache "^0.2.1"
+    kind-of "^6.0.2"
+    nanomatch "^1.2.9"
+    object.pick "^1.3.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.2"
+
+miller-rabin@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/miller-rabin/-/miller-rabin-4.0.1.tgz#f080351c865b0dc562a8462966daa53543c78a4d"
+  integrity sha512-115fLhvZVqWwHPbClyntxEVfVDfl9DLLTuJvq3g2O/Oxi8AiNouAHvDSzHS0viUJc+V5vm3eq91Xwqn9dp4jRA==
+  dependencies:
+    bn.js "^4.0.0"
+    brorand "^1.0.1"
+
+mime-db@~1.37.0:
+  version "1.37.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.37.0.tgz#0b6a0ce6fdbe9576e25f1f2d2fde8830dc0ad0d8"
+  integrity sha512-R3C4db6bgQhlIhPU48fUtdVmKnflq+hRdad7IyKhtFj06VPNVdk2RhiYL3UjQIlso8L+YxAtFkobT0VK+S/ybg==
+
+mime-types@^2.1.12, mime-types@~2.1.18, mime-types@~2.1.19:
+  version "2.1.21"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.21.tgz#28995aa1ecb770742fe6ae7e58f9181c744b3f96"
+  integrity sha512-3iL6DbwpyLzjR3xHSFNFeb9Nz/M8WDkX33t1GFQnFOllWk8pOrh/LSrB5OXlnlW5P9LH73X6loW/eogc+F5lJg==
+  dependencies:
+    mime-db "~1.37.0"
+
+mime@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
+  integrity sha512-x0Vn8spI+wuJ1O6S7gnbaQg8Pxh4NNHb7KSINmEWKiPE4RKOplvijn+NkmYmmRgP68mc70j2EbeTFRsrswaQeg==
+
+mime@^2.0.3, mime@^2.3.1:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.0.tgz#e051fd881358585f3279df333fe694da0bcffdd6"
+  integrity sha512-ikBcWwyqXQSHKtciCcctu9YfPbFYZ4+gbHEmE0Q8jzcTYQg5dHCr3g2wwAZjPoJfQVXZq6KXAjpXOTf5/cjT7w==
+
+mimic-fn@^1.0.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/mimic-fn/-/mimic-fn-1.2.0.tgz#820c86a39334640e99516928bd03fca88057d022"
+  integrity sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ==
+
+minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
+  integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
+
+minimalistic-crypto-utils@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
+  integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=
+
+"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
+  integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
+  dependencies:
+    brace-expansion "^1.1.7"
+
+minimatch@3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
+  integrity sha1-Kk5AkLlrLbBqnX3wEFWmKnfJt3Q=
+  dependencies:
+    brace-expansion "^1.0.0"
+
+minimist-options@^3.0.1:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/minimist-options/-/minimist-options-3.0.2.tgz#fba4c8191339e13ecf4d61beb03f070103f3d954"
+  integrity sha512-FyBrT/d0d4+uiZRbqznPXqw3IpZZG3gl3wKWiX784FycUKVwBt0uLBFkQrtE4tZOrgo78nZp2jnKz3L65T5LdQ==
+  dependencies:
+    arrify "^1.0.1"
+    is-plain-obj "^1.1.0"
+
+minimist@0.0.8:
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+  integrity sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=
+
+minimist@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
+  integrity sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=
+
+minimist@^1.1.0, minimist@^1.1.3, minimist@^1.2.0, minimist@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
+  integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
+
+minimist@~0.0.1:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
+  integrity sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8=
+
+minipass@^2.6.0, minipass@^2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/minipass/-/minipass-2.9.0.tgz#e713762e7d3e32fed803115cf93e04bca9fcc9a6"
+  integrity sha512-wxfUjg9WebH+CUDX/CdbRlh5SmfZiy/hpkxaRI16Y9W56Pa75sWgd/rvFilSgrauD9NyFymP/+JFV3KwzIsJeg==
+  dependencies:
+    safe-buffer "^5.1.2"
+    yallist "^3.0.0"
+
+minizlib@^1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/minizlib/-/minizlib-1.3.3.tgz#2290de96818a34c29551c8a8d301216bd65a861d"
+  integrity sha512-6ZYMOEnmVsdCeTJVE0W9ZD+pVnE8h9Hma/iOwwRDsdQoePpoX56/8B6z3P9VNwppJuBKNRuFDRNRqRWexT9G9Q==
+  dependencies:
+    minipass "^2.9.0"
+
+mississippi@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/mississippi/-/mississippi-3.0.0.tgz#ea0a3291f97e0b5e8776b363d5f0a12d94c67022"
+  integrity sha512-x471SsVjUtBRtcvd4BzKE9kFC+/2TeWgKCgw0bZcw1b9l2X3QX5vCWgF+KaZaYm87Ss//rHnWryupDrgLvmSkA==
+  dependencies:
+    concat-stream "^1.5.0"
+    duplexify "^3.4.2"
+    end-of-stream "^1.1.0"
+    flush-write-stream "^1.0.0"
+    from2 "^2.1.0"
+    parallel-transform "^1.1.0"
+    pump "^3.0.0"
+    pumpify "^1.3.3"
+    stream-each "^1.1.0"
+    through2 "^2.0.0"
+
+mixin-deep@^1.2.0:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/mixin-deep/-/mixin-deep-1.3.2.tgz#1120b43dc359a785dce65b55b82e257ccf479566"
+  integrity sha512-WRoDn//mXBiJ1H40rqa3vH0toePwSsGb45iInWlTySa+Uu4k3tYUSxa2v1KqAiLtvlrSzaExqS1gtk96A9zvEA==
+  dependencies:
+    for-in "^1.0.2"
+    is-extendable "^1.0.1"
+
+mkdirp@0.5.1:
+  version "0.5.1"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
+  integrity sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=
+  dependencies:
+    minimist "0.0.8"
+
+mkdirp@0.5.x, mkdirp@^0.5.1, mkdirp@^0.5.5, mkdirp@~0.5.0:
+  version "0.5.5"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
+  integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
+  dependencies:
+    minimist "^1.2.5"
+
+mkpath@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/mkpath/-/mkpath-1.0.0.tgz#ebb3a977e7af1c683ae6fda12b545a6ba6c5853d"
+  integrity sha1-67Opd+evHGg65v2hK1Raa6bFhT0=
+
+mocha-nightwatch@3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/mocha-nightwatch/-/mocha-nightwatch-3.2.2.tgz#91bcb9b3bde057dd7677c78125e491e58d66647c"
+  integrity sha1-kby5s73gV912d8eBJeSR5Y1mZHw=
+  dependencies:
+    browser-stdout "1.3.0"
+    commander "2.9.0"
+    debug "2.2.0"
+    diff "1.4.0"
+    escape-string-regexp "1.0.5"
+    glob "7.0.5"
+    growl "1.9.2"
+    json3 "3.3.2"
+    lodash.create "3.1.1"
+    mkdirp "0.5.1"
+    supports-color "3.1.2"
+
+modify-values@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/modify-values/-/modify-values-1.0.1.tgz#b3939fa605546474e3e3e3c63d64bd43b4ee6022"
+  integrity sha512-xV2bxeN6F7oYjZWTe/YPAy6MN2M+sL4u/Rlm2AHCIVGfo2p1yGmBHQ6vHehl4bRTZBdHu3TSkWdYgkwpYzAGSw==
+
+move-concurrently@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/move-concurrently/-/move-concurrently-1.0.1.tgz#be2c005fda32e0b29af1f05d7c4b33214c701f92"
+  integrity sha1-viwAX9oy4LKa8fBdfEszIUxwH5I=
+  dependencies:
+    aproba "^1.1.1"
+    copy-concurrently "^1.0.0"
+    fs-write-stream-atomic "^1.0.8"
+    mkdirp "^0.5.1"
+    rimraf "^2.5.4"
+    run-queue "^1.0.3"
+
+ms@0.7.1:
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"
+  integrity sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=
+
+ms@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
+  integrity sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=
+
+ms@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
+  integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
+
+mute-stream@0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.6.tgz#48962b19e169fd1dfc240b3f1e7317627bbc47db"
+  integrity sha1-SJYrGeFp/R38JAs/HnMXYnu8R9s=
+
+mute-stream@0.0.7:
+  version "0.0.7"
+  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.7.tgz#3075ce93bc21b8fab43e1bc4da7e8115ed1e7bab"
+  integrity sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=
+
+nan@^2.9.2:
+  version "2.12.1"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.12.1.tgz#7b1aa193e9aa86057e3c7bbd0ac448e770925552"
+  integrity sha512-JY7V6lRkStKcKTvHO5NVSQRv+RV+FIL5pvDoLiAtSL9pKlC5x9PKQcZDsq7m4FO4d57mkhC6Z+QhAh3Jdk5JFw==
+
+nanomatch@^1.2.9:
+  version "1.2.13"
+  resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
+  integrity sha512-fpoe2T0RbHwBTBUOftAfBPaDEi06ufaUai0mE6Yn1kacc3SnTErfb/h+X94VXzI64rKFHYImXSvdwGGCmwOqCA==
+  dependencies:
+    arr-diff "^4.0.0"
+    array-unique "^0.3.2"
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    fragment-cache "^0.2.1"
+    is-windows "^1.0.2"
+    kind-of "^6.0.2"
+    object.pick "^1.3.0"
+    regex-not "^1.0.0"
+    snapdragon "^0.8.1"
+    to-regex "^3.0.1"
+
+natural-compare@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
+  integrity sha1-Sr6/7tdUHywnrPspvbvRXI1bpPc=
+
+needle@^2.2.1:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/needle/-/needle-2.2.4.tgz#51931bff82533b1928b7d1d69e01f1b00ffd2a4e"
+  integrity sha512-HyoqEb4wr/rsoaIDfTH2aVL9nWtQqba2/HvMv+++m8u0dz808MaagKILxtfeSN7QU7nvbQ79zk3vYOJp9zsNEA==
+  dependencies:
+    debug "^2.1.2"
+    iconv-lite "^0.4.4"
+    sax "^1.2.4"
+
+negotiator@0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
+  integrity sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=
+
+neo-async@^2.5.0, neo-async@^2.6.0:
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.2.tgz#b4aafb93e3aeb2d8174ca53cf163ab7d7308305f"
+  integrity sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==
+
+netmask@~1.0.4:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/netmask/-/netmask-1.0.6.tgz#20297e89d86f6f6400f250d9f4f6b4c1945fcd35"
+  integrity sha1-ICl+idhvb2QA8lDZ9Pa0wZRfzTU=
+
+nice-try@^1.0.4:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
+  integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
+
+nightwatch-helpers@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/nightwatch-helpers/-/nightwatch-helpers-1.2.0.tgz#cdefeb7635074a141825a7b6d1b955b6d7810a0f"
+  integrity sha1-ze/rdjUHShQYJae20blVtteBCg8=
+
+nightwatch@^0.9.16:
+  version "0.9.21"
+  resolved "https://registry.yarnpkg.com/nightwatch/-/nightwatch-0.9.21.tgz#9e794a7514b4fd5f46602d368e50515232ab9e90"
+  integrity sha1-nnlKdRS0/V9GYC02jlBRUjKrnpA=
+  dependencies:
+    chai-nightwatch "~0.1.x"
+    ejs "2.5.7"
+    lodash.clone "3.0.3"
+    lodash.defaultsdeep "4.3.2"
+    minimatch "3.0.3"
+    mkpath "1.0.0"
+    mocha-nightwatch "3.2.2"
+    optimist "0.6.1"
+    proxy-agent "2.0.0"
+    q "1.4.1"
+
+node-fetch@1.6.3:
+  version "1.6.3"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-1.6.3.tgz#dc234edd6489982d58e8f0db4f695029abcd8c04"
+  integrity sha1-3CNO3WSJmC1Y6PDbT2lQKavNjAQ=
+  dependencies:
+    encoding "^0.1.11"
+    is-stream "^1.0.1"
+
+node-libs-browser@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/node-libs-browser/-/node-libs-browser-2.1.0.tgz#5f94263d404f6e44767d726901fff05478d600df"
+  integrity sha512-5AzFzdoIMb89hBGMZglEegffzgRg+ZFoUmisQ8HI4j1KDdpx13J0taNp2y9xPbur6W61gepGDDotGBVQ7mfUCg==
+  dependencies:
+    assert "^1.1.1"
+    browserify-zlib "^0.2.0"
+    buffer "^4.3.0"
+    console-browserify "^1.1.0"
+    constants-browserify "^1.0.0"
+    crypto-browserify "^3.11.0"
+    domain-browser "^1.1.1"
+    events "^1.0.0"
+    https-browserify "^1.0.0"
+    os-browserify "^0.3.0"
+    path-browserify "0.0.0"
+    process "^0.11.10"
+    punycode "^1.2.4"
+    querystring-es3 "^0.2.0"
+    readable-stream "^2.3.3"
+    stream-browserify "^2.0.1"
+    stream-http "^2.7.2"
+    string_decoder "^1.0.0"
+    timers-browserify "^2.0.4"
+    tty-browserify "0.0.0"
+    url "^0.11.0"
+    util "^0.10.3"
+    vm-browserify "0.0.4"
+
+node-modules-regexp@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/node-modules-regexp/-/node-modules-regexp-1.0.0.tgz#8d9dbe28964a4ac5712e9131642107c71e90ec40"
+  integrity sha1-jZ2+KJZKSsVxLpExZCEHxx6Q7EA=
+
+node-pre-gyp@^0.10.0:
+  version "0.10.3"
+  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.10.3.tgz#3070040716afdc778747b61b6887bf78880b80fc"
+  integrity sha512-d1xFs+C/IPS8Id0qPTZ4bUT8wWryfR/OzzAFxweG+uLN85oPzyo2Iw6bVlLQ/JOdgNonXLCoRyqDzDWq4iw72A==
+  dependencies:
+    detect-libc "^1.0.2"
+    mkdirp "^0.5.1"
+    needle "^2.2.1"
+    nopt "^4.0.1"
+    npm-packlist "^1.1.6"
+    npmlog "^4.0.2"
+    rc "^1.2.7"
+    rimraf "^2.6.1"
+    semver "^5.3.0"
+    tar "^4"
+
+node-releases@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.3.tgz#aad9ce0dcb98129c753f772c0aa01360fb90fbd2"
+  integrity sha512-6VrvH7z6jqqNFY200kdB6HdzkgM96Oaj9v3dqGfgp6mF+cHmU4wyQKZ2/WPDRVoR0Jz9KqbamaBN0ZhdUaysUQ==
+  dependencies:
+    semver "^5.3.0"
+
+nopt@3.x:
+  version "3.0.6"
+  resolved "https://registry.yarnpkg.com/nopt/-/nopt-3.0.6.tgz#c6465dbf08abcd4db359317f79ac68a646b28ff9"
+  integrity sha1-xkZdvwirzU2zWTF/eaxopkayj/k=
+  dependencies:
+    abbrev "1"
+
+nopt@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/nopt/-/nopt-4.0.1.tgz#d0d4685afd5415193c8c7505602d0d17cd64474d"
+  integrity sha1-0NRoWv1UFRk8jHUFYC0NF81kR00=
+  dependencies:
+    abbrev "1"
+    osenv "^0.1.4"
+
+normalize-package-data@^2.3.0, normalize-package-data@^2.3.2, normalize-package-data@^2.3.4, normalize-package-data@^2.3.5:
+  version "2.4.0"
+  resolved "https://registry.yarnpkg.com/normalize-package-data/-/normalize-package-data-2.4.0.tgz#12f95a307d58352075a04907b84ac8be98ac012f"
+  integrity sha512-9jjUFbTPfEy3R/ad/2oNbKtW9Hgovl5O1FvFWKkKblNXoN/Oou6+9+KKohPK13Yc3/TyunyWhJp6gvRNR/PPAw==
+  dependencies:
+    hosted-git-info "^2.1.4"
+    is-builtin-module "^1.0.0"
+    semver "2 || 3 || 4 || 5"
+    validate-npm-package-license "^3.0.1"
+
+normalize-path@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-1.0.0.tgz#32d0e472f91ff345701c15a8311018d3b0a90379"
+  integrity sha1-MtDkcvkf80VwHBWoMRAY07CpA3k=
+
+normalize-path@^2.0.1, normalize-path@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-2.1.1.tgz#1ab28b556e198363a8c1a6f7e6fa20137fe6aed9"
+  integrity sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=
+  dependencies:
+    remove-trailing-separator "^1.0.1"
+
+npm-bundled@^1.0.1:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/npm-bundled/-/npm-bundled-1.0.5.tgz#3c1732b7ba936b3a10325aef616467c0ccbcc979"
+  integrity sha512-m/e6jgWu8/v5niCUKQi9qQl8QdeEduFA96xHDDzFGqly0OOjI7c+60KM/2sppfnUU9JJagf+zs+yGhqSOFj71g==
+
+npm-packlist@^1.1.6:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/npm-packlist/-/npm-packlist-1.2.0.tgz#55a60e793e272f00862c7089274439a4cc31fc7f"
+  integrity sha512-7Mni4Z8Xkx0/oegoqlcao/JpPCPEMtUvsmB0q7mgvlMinykJLSRTYuFqoQLYgGY8biuxIeiHO+QNJKbCfljewQ==
+  dependencies:
+    ignore-walk "^3.0.1"
+    npm-bundled "^1.0.1"
+
+npm-path@^2.0.2:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/npm-path/-/npm-path-2.0.4.tgz#c641347a5ff9d6a09e4d9bce5580c4f505278e64"
+  integrity sha512-IFsj0R9C7ZdR5cP+ET342q77uSRdtWOlWpih5eC+lu29tIDbNEgDbzgVJ5UFvYHWhxDZ5TFkJafFioO0pPQjCw==
+  dependencies:
+    which "^1.2.10"
+
+npm-run-path@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/npm-run-path/-/npm-run-path-2.0.2.tgz#35a9232dfa35d7067b4cb2ddf2357b1871536c5f"
+  integrity sha1-NakjLfo11wZ7TLLd8jV7GHFTbF8=
+  dependencies:
+    path-key "^2.0.0"
+
+npm-which@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/npm-which/-/npm-which-3.0.1.tgz#9225f26ec3a285c209cae67c3b11a6b4ab7140aa"
+  integrity sha1-kiXybsOihcIJyuZ8OxGmtKtxQKo=
+  dependencies:
+    commander "^2.9.0"
+    npm-path "^2.0.2"
+    which "^1.2.10"
+
+npmlog@^4.0.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.1.2.tgz#08a7f2a8bf734604779a9efa4ad5cc717abb954b"
+  integrity sha512-2uUqazuKlTaSI/dC8AzicUck7+IrEaOnN/e0jd3Xtt1KcGpwx30v50mL7oPyr/h9bL3E4aZccVwpwP+5W9Vjkg==
+  dependencies:
+    are-we-there-yet "~1.1.2"
+    console-control-strings "~1.1.0"
+    gauge "~2.7.3"
+    set-blocking "~2.0.0"
+
+null-check@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/null-check/-/null-check-1.0.0.tgz#977dffd7176012b9ec30d2a39db5cf72a0439edd"
+  integrity sha1-l33/1xdgErnsMNKjnbXPcqBDnt0=
+
+number-is-nan@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/number-is-nan/-/number-is-nan-1.0.1.tgz#097b602b53422a522c1afb8790318336941a011d"
+  integrity sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=
+
+oauth-sign@~0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.9.0.tgz#47a7b016baa68b5fa0ecf3dee08a85c679ac6455"
+  integrity sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==
+
+object-assign@^4.0.1, object-assign@^4.1.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
+
+object-component@0.0.3:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/object-component/-/object-component-0.0.3.tgz#f0c69aa50efc95b866c186f400a33769cb2f1291"
+  integrity sha1-8MaapQ78lbhmwYb0AKM3acsvEpE=
+
+object-copy@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/object-copy/-/object-copy-0.1.0.tgz#7e7d858b781bd7c991a41ba975ed3812754e998c"
+  integrity sha1-fn2Fi3gb18mRpBupde04EnVOmYw=
+  dependencies:
+    copy-descriptor "^0.1.0"
+    define-property "^0.2.5"
+    kind-of "^3.0.3"
+
+object-keys@^1.0.12:
+  version "1.0.12"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.0.12.tgz#09c53855377575310cca62f55bb334abff7b3ed2"
+  integrity sha512-FTMyFUm2wBcGHnH2eXmz7tC6IwlqQZ6mVZ+6dm6vZ4IQIHjs6FdNsQBuKGPuUUUY6NfJw2PshC08Tn6LzLDOag==
+
+object-visit@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/object-visit/-/object-visit-1.0.1.tgz#f79c4493af0c5377b59fe39d395e41042dd045bb"
+  integrity sha1-95xEk68MU3e1n+OdOV5BBC3QRbs=
+  dependencies:
+    isobject "^3.0.0"
+
+object.getownpropertydescriptors@^2.0.3:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/object.getownpropertydescriptors/-/object.getownpropertydescriptors-2.0.3.tgz#8758c846f5b407adab0f236e0986f14b051caa16"
+  integrity sha1-h1jIRvW0B62rDyNuCYbxSwUcqhY=
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.5.1"
+
+object.omit@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
+  integrity sha1-Gpx0SCnznbuFjHbKNXmuKlTr0fo=
+  dependencies:
+    for-own "^0.1.4"
+    is-extendable "^0.1.1"
+
+object.pick@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/object.pick/-/object.pick-1.3.0.tgz#87a10ac4c1694bd2e1cbf53591a66141fb5dd747"
+  integrity sha1-h6EKxMFpS9Lhy/U1kaZhQftd10c=
+  dependencies:
+    isobject "^3.0.1"
+
+on-finished@~2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
+  integrity sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=
+  dependencies:
+    ee-first "1.1.1"
+
+once@1.x, once@^1.3.0, once@^1.3.1, once@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  integrity sha1-WDsap3WWHUsROsF9nFC6753Xa9E=
+  dependencies:
+    wrappy "1"
+
+onetime@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+  integrity sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=
+
+onetime@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/onetime/-/onetime-2.0.1.tgz#067428230fd67443b2794b22bba528b6867962d4"
+  integrity sha1-BnQoIw/WdEOyeUsiu6UotoZ5YtQ=
+  dependencies:
+    mimic-fn "^1.0.0"
+
+opencollective@1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/opencollective/-/opencollective-1.0.3.tgz#aee6372bc28144583690c3ca8daecfc120dd0ef1"
+  integrity sha1-ruY3K8KBRFg2kMPKja7PwSDdDvE=
+  dependencies:
+    babel-polyfill "6.23.0"
+    chalk "1.1.3"
+    inquirer "3.0.6"
+    minimist "1.2.0"
+    node-fetch "1.6.3"
+    opn "4.0.2"
+
+opener@^1.5.1:
+  version "1.5.2"
+  resolved "https://registry.yarnpkg.com/opener/-/opener-1.5.2.tgz#5d37e1f35077b9dcac4301372271afdeb2a13598"
+  integrity sha512-ur5UIdyw5Y7yEj9wLzhqXiy6GZ3Mwx0yGI+5sMn2r0N0v3cKJvUmFH5yPP+WXh9e0xfyzyJX95D8l088DNFj7A==
+
+opn@4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/opn/-/opn-4.0.2.tgz#7abc22e644dff63b0a96d5ab7f2790c0f01abc95"
+  integrity sha1-erwi5kTf9jsKltWrfyeQwPAavJU=
+  dependencies:
+    object-assign "^4.0.1"
+    pinkie-promise "^2.0.0"
+
+optimist@0.6.1, optimist@^0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"
+  integrity sha1-2j6nRob6IaGaERwybpDrFaAZZoY=
+  dependencies:
+    minimist "~0.0.1"
+    wordwrap "~0.0.2"
+
+optionator@^0.8.1, optionator@^0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
+  integrity sha1-NkxeQJ0/TWMB1sC0wFu6UBgK62Q=
+  dependencies:
+    deep-is "~0.1.3"
+    fast-levenshtein "~2.0.4"
+    levn "~0.3.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+    wordwrap "~1.0.0"
+
+os-browserify@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.3.0.tgz#854373c7f5c2315914fc9bfc6bd8238fdda1ec27"
+  integrity sha1-hUNzx/XCMVkU/Jv8a9gjj92h7Cc=
+
+os-homedir@^1.0.0, os-homedir@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
+  integrity sha1-/7xJiDNuDoM94MFox+8VISGqf7M=
+
+os-shim@^0.1.2:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/os-shim/-/os-shim-0.1.3.tgz#6b62c3791cf7909ea35ed46e17658bb417cb3917"
+  integrity sha1-a2LDeRz3kJ6jXtRuF2WLtBfLORc=
+
+os-tmpdir@^1.0.0, os-tmpdir@~1.0.1, os-tmpdir@~1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/os-tmpdir/-/os-tmpdir-1.0.2.tgz#bbe67406c79aa85c5cfec766fe5734555dfa1274"
+  integrity sha1-u+Z0BseaqFxc/sdm/lc0VV36EnQ=
+
+osenv@^0.1.4:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/osenv/-/osenv-0.1.5.tgz#85cdfafaeb28e8677f416e287592b5f3f49ea410"
+  integrity sha512-0CWcCECdMVc2Rw3U5w9ZjqX6ga6ubk1xDVKxtBQPK7wis/0F2r9T6k4ydGYhecl7YUBxBVxhL5oisPsNxAPe2g==
+  dependencies:
+    os-homedir "^1.0.0"
+    os-tmpdir "^1.0.0"
+
+p-finally@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
+  integrity sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4=
+
+p-limit@^1.1.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-1.3.0.tgz#b86bd5f0c25690911c7590fcbfc2010d54b3ccb8"
+  integrity sha512-vvcXsLAJ9Dr5rQOPk7toZQZJApBl2K4J6dANSsEuh6QI41JYcsS/qhTGa9ErIUUgK3WNQoJYvylxvjqmiqEA9Q==
+  dependencies:
+    p-try "^1.0.0"
+
+p-limit@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.1.0.tgz#1d5a0d20fb12707c758a655f6bbc4386b5930d68"
+  integrity sha512-NhURkNcrVB+8hNfLuysU8enY5xn2KXphsHBaC2YmRNTZRc7RWusw6apSpdEj3jo4CMb6W9nrF6tTnsJsJeyu6g==
+  dependencies:
+    p-try "^2.0.0"
+
+p-locate@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-2.0.0.tgz#20a0103b222a70c8fd39cc2e580680f3dde5ec43"
+  integrity sha1-IKAQOyIqcMj9OcwuWAaA893l7EM=
+  dependencies:
+    p-limit "^1.1.0"
+
+p-locate@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-3.0.0.tgz#322d69a05c0264b25997d9f40cd8a891ab0064a4"
+  integrity sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==
+  dependencies:
+    p-limit "^2.0.0"
+
+p-map@^1.1.1:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/p-map/-/p-map-1.2.0.tgz#e4e94f311eabbc8633a1e79908165fca26241b6b"
+  integrity sha512-r6zKACMNhjPJMTl8KcFH4li//gkrXWfbD6feV8l6doRHlzljFWGJ2AP6iKaCJXyZmAUMOPtvbW7EXkbWO/pLEA==
+
+p-map@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-map/-/p-map-2.0.0.tgz#be18c5a5adeb8e156460651421aceca56c213a50"
+  integrity sha512-GO107XdrSUmtHxVoi60qc9tUl/KkNKm+X2CF4P9amalpGxv5YqVPJNfSb0wcA+syCopkZvYYIzW8OVTQW59x/w==
+
+p-try@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
+  integrity sha1-y8ec26+P1CKOE/Yh8rGiN8GyB7M=
+
+p-try@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.0.0.tgz#85080bb87c64688fa47996fe8f7dfbe8211760b1"
+  integrity sha512-hMp0onDKIajHfIkdRk3P4CdCmErkYAxxDtP3Wx/4nZ3aGlau2VKh3mZpcuFkH27WQkL/3WBCPOktzA9ZOAnMQQ==
+
+pac-proxy-agent@1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/pac-proxy-agent/-/pac-proxy-agent-1.1.0.tgz#34a385dfdf61d2f0ecace08858c745d3e791fd4d"
+  integrity sha512-QBELCWyLYPgE2Gj+4wUEiMscHrQ8nRPBzYItQNOHWavwBt25ohZHQC4qnd5IszdVVrFbLsQ+dPkm6eqdjJAmwQ==
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+    get-uri "2"
+    http-proxy-agent "1"
+    https-proxy-agent "1"
+    pac-resolver "~2.0.0"
+    raw-body "2"
+    socks-proxy-agent "2"
+
+pac-resolver@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pac-resolver/-/pac-resolver-2.0.0.tgz#99b88d2f193fbdeefc1c9a529c1f3260ab5277cd"
+  integrity sha1-mbiNLxk/ve78HJpSnB8yYKtSd80=
+  dependencies:
+    co "~3.0.6"
+    degenerator "~1.0.2"
+    ip "1.0.1"
+    netmask "~1.0.4"
+    thunkify "~2.1.1"
+
+pad-right@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/pad-right/-/pad-right-0.2.2.tgz#6fbc924045d244f2a2a244503060d3bfc6009774"
+  integrity sha1-b7ySQEXSRPKiokRQMGDTv8YAl3Q=
+  dependencies:
+    repeat-string "^1.5.2"
+
+pako@~1.0.2, pako@~1.0.5:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.7.tgz#2473439021b57f1516c82f58be7275ad8ef1bb27"
+  integrity sha512-3HNK5tW4x8o5mO8RuHZp3Ydw9icZXx0RANAOMzlMzx7LVXhMJ4mo3MOBpzyd7r/+RUu8BmndP47LXT+vzjtWcQ==
+
+parallel-transform@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/parallel-transform/-/parallel-transform-1.1.0.tgz#d410f065b05da23081fcd10f28854c29bda33b06"
+  integrity sha1-1BDwZbBdojCB/NEPKIVMKb2jOwY=
+  dependencies:
+    cyclist "~0.2.2"
+    inherits "^2.0.3"
+    readable-stream "^2.1.5"
+
+parent-module@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/parent-module/-/parent-module-1.0.0.tgz#df250bdc5391f4a085fb589dad761f5ad6b865b5"
+  integrity sha512-8Mf5juOMmiE4FcmzYc4IaiS9L3+9paz2KOiXzkRviCP6aDmN49Hz6EMWz0lGNp9pX80GvvAuLADtyGfW/Em3TA==
+  dependencies:
+    callsites "^3.0.0"
+
+parse-asn1@^5.0.0:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/parse-asn1/-/parse-asn1-5.1.1.tgz#f6bf293818332bd0dab54efb16087724745e6ca8"
+  integrity sha512-KPx7flKXg775zZpnp9SxJlz00gTd4BmJ2yJufSc44gMCRrRQ7NSzAcSJQfifuOLgW6bEi+ftrALtsgALeB2Adw==
+  dependencies:
+    asn1.js "^4.0.0"
+    browserify-aes "^1.0.0"
+    create-hash "^1.1.0"
+    evp_bytestokey "^1.0.0"
+    pbkdf2 "^3.0.3"
+
+parse-github-repo-url@^1.3.0:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/parse-github-repo-url/-/parse-github-repo-url-1.4.1.tgz#9e7d8bb252a6cb6ba42595060b7bf6df3dbc1f50"
+  integrity sha1-nn2LslKmy2ukJZUGC3v23z28H1A=
+
+parse-glob@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/parse-glob/-/parse-glob-3.0.4.tgz#b2c376cfb11f35513badd173ef0bb6e3a388391c"
+  integrity sha1-ssN2z7EfNVE7rdFz7wu246OIORw=
+  dependencies:
+    glob-base "^0.3.0"
+    is-dotfile "^1.0.0"
+    is-extglob "^1.0.0"
+    is-glob "^2.0.0"
+
+parse-json@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-2.2.0.tgz#f480f40434ef80741f8469099f8dea18f55a4dc9"
+  integrity sha1-9ID0BDTvgHQfhGkJn43qGPVaTck=
+  dependencies:
+    error-ex "^1.2.0"
+
+parse-json@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-4.0.0.tgz#be35f5425be1f7f6c747184f98a788cb99477ee0"
+  integrity sha1-vjX1Qlvh9/bHRxhPmKeIy5lHfuA=
+  dependencies:
+    error-ex "^1.3.1"
+    json-parse-better-errors "^1.0.1"
+
+parse-passwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/parse-passwd/-/parse-passwd-1.0.0.tgz#6d5b934a456993b23d37f40a382d6f1666a8e5c6"
+  integrity sha1-bVuTSkVpk7I9N/QKOC1vFmao5cY=
+
+parseqs@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/parseqs/-/parseqs-0.0.5.tgz#d5208a3738e46766e291ba2ea173684921a8b89d"
+  integrity sha1-1SCKNzjkZ2bikbouoXNoSSGouJ0=
+  dependencies:
+    better-assert "~1.0.0"
+
+parseuri@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/parseuri/-/parseuri-0.0.5.tgz#80204a50d4dbb779bfdc6ebe2778d90e4bce320a"
+  integrity sha1-gCBKUNTbt3m/3G6+J3jZDkvOMgo=
+  dependencies:
+    better-assert "~1.0.0"
+
+parseurl@~1.3.2:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.2.tgz#fc289d4ed8993119460c156253262cdc8de65bf3"
+  integrity sha1-/CidTtiZMRlGDBViUyYs3I3mW/M=
+
+pascalcase@^0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/pascalcase/-/pascalcase-0.1.1.tgz#b363e55e8006ca6fe21784d2db22bd15d7917f14"
+  integrity sha1-s2PlXoAGym/iF4TS2yK9FdeRfxQ=
+
+path-browserify@0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/path-browserify/-/path-browserify-0.0.0.tgz#a0b870729aae214005b7d5032ec2cbbb0fb4451a"
+  integrity sha1-oLhwcpquIUAFt9UDLsLLuw+0RRo=
+
+path-dirname@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/path-dirname/-/path-dirname-1.0.2.tgz#cc33d24d525e099a5388c0336c6e32b9160609e0"
+  integrity sha1-zDPSTVJeCZpTiMAzbG4yuRYGCeA=
+
+path-exists@2.1.0, path-exists@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-2.1.0.tgz#0feb6c64f0fc518d9a754dd5efb62c7022761f4b"
+  integrity sha1-D+tsZPD8UY2adU3V77YscCJ2H0s=
+  dependencies:
+    pinkie-promise "^2.0.0"
+
+path-exists@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-3.0.0.tgz#ce0ebeaa5f78cb18925ea7d810d7b59b010fd515"
+  integrity sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=
+
+path-is-absolute@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
+  integrity sha1-F0uSaHNVNP+8es5r9TpanhtcX18=
+
+path-is-inside@^1.0.1, path-is-inside@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/path-is-inside/-/path-is-inside-1.0.2.tgz#365417dede44430d1c11af61027facf074bdfc53"
+  integrity sha1-NlQX3t5EQw0cEa9hAn+s8HS9/FM=
+
+path-key@^2.0.0, path-key@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
+  integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
+
+path-parse@^1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
+  integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
+
+path-type@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/path-type/-/path-type-1.1.0.tgz#59c44f7ee491da704da415da5a4070ba4f8fe441"
+  integrity sha1-WcRPfuSR2nBNpBXaWkBwuk+P5EE=
+  dependencies:
+    graceful-fs "^4.1.2"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
+path-type@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/path-type/-/path-type-3.0.0.tgz#cef31dc8e0a1a3bb0d105c0cd97cf3bf47f4e36f"
+  integrity sha512-T2ZUsdZFHgA3u4e5PfPbjd7HDDpxPnQb5jN0SrDsjNSuVXHJqtwTnWqG0B1jZrgmJ/7lj1EmVIByWt1gxGkWvg==
+  dependencies:
+    pify "^3.0.0"
+
+pbkdf2@^3.0.3:
+  version "3.0.17"
+  resolved "https://registry.yarnpkg.com/pbkdf2/-/pbkdf2-3.0.17.tgz#976c206530617b14ebb32114239f7b09336e93a6"
+  integrity sha512-U/il5MsrZp7mGg3mSQfn742na2T+1/vHDCG5/iTI3X9MKUuYUZVLQhyRsg06mCgDBTd57TxzgZt7P+fYfjRLtA==
+  dependencies:
+    create-hash "^1.1.2"
+    create-hmac "^1.1.4"
+    ripemd160 "^2.0.1"
+    safe-buffer "^5.0.1"
+    sha.js "^2.4.8"
+
+pend@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/pend/-/pend-1.2.0.tgz#7a57eb550a6783f9115331fcf4663d5c8e007a50"
+  integrity sha1-elfrVQpng/kRUzH89GY9XI4AelA=
+
+performance-now@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-2.1.0.tgz#6309f4e0e5fa913ec1c69307ae364b4b377c9e7b"
+  integrity sha1-Ywn04OX6kT7BxpMHrjZLSzd8nns=
+
+phantomjs-prebuilt@^2.1.14, phantomjs-prebuilt@^2.1.7:
+  version "2.1.16"
+  resolved "https://registry.yarnpkg.com/phantomjs-prebuilt/-/phantomjs-prebuilt-2.1.16.tgz#efd212a4a3966d3647684ea8ba788549be2aefef"
+  integrity sha1-79ISpKOWbTZHaE6ouniFSb4q7+8=
+  dependencies:
+    es6-promise "^4.0.3"
+    extract-zip "^1.6.5"
+    fs-extra "^1.0.0"
+    hasha "^2.2.0"
+    kew "^0.7.0"
+    progress "^1.1.8"
+    request "^2.81.0"
+    request-progress "^2.0.1"
+    which "^1.2.10"
+
+pify@^2.0.0, pify@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
+  integrity sha1-7RQaasBDqEnqWISY59yosVMw6Qw=
+
+pify@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
+  integrity sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=
+
+pinkie-promise@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
+  integrity sha1-ITXW36ejWMBprJsXh3YogihFD/o=
+  dependencies:
+    pinkie "^2.0.0"
+
+pinkie@^2.0.0:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
+  integrity sha1-clVrgM+g1IqXToDnckjoDtT3+HA=
+
+pirates@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/pirates/-/pirates-4.0.0.tgz#850b18781b4ac6ec58a43c9ed9ec5fe6796addbd"
+  integrity sha512-8t5BsXy1LUIjn3WWOlOuFDuKswhQb/tkak641lvBgmPOBUQHXveORtlMCp6OdPV1dtuTaEahKA8VNz6uLfKBtA==
+  dependencies:
+    node-modules-regexp "^1.0.0"
+
+pkg-dir@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-2.0.0.tgz#f6d5d1109e19d63edf428e0bd57e12777615334b"
+  integrity sha1-9tXREJ4Z1j7fQo4L1X4Sd3YVM0s=
+  dependencies:
+    find-up "^2.1.0"
+
+pkg-dir@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-3.0.0.tgz#2749020f239ed990881b1f71210d51eb6523bea3"
+  integrity sha512-/E57AYkoeQ25qkxMj5PBOVgF8Kiu/h7cYS30Z5+R7WaiCCBfLq58ZI/dSeaEKb9WVJV5n/03QwrN3IeWIFllvw==
+  dependencies:
+    find-up "^3.0.0"
+
+please-upgrade-node@^3.0.2:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/please-upgrade-node/-/please-upgrade-node-3.1.1.tgz#ed320051dfcc5024fae696712c8288993595e8ac"
+  integrity sha512-KY1uHnQ2NlQHqIJQpnh/i54rKkuxCEBx+voJIS/Mvb+L2iYd2NMotwduhKTMjfC1uKoX3VXOxLjIYG66dfJTVQ==
+  dependencies:
+    semver-compare "^1.0.0"
+
+pluralize@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-7.0.0.tgz#298b89df8b93b0221dbf421ad2b1b1ea23fc6777"
+  integrity sha512-ARhBOdzS3e41FbkW/XWrTEtukqqLoK5+Z/4UeDaLuSW+39JPeFgs4gCGqsrJHVZX0fUrx//4OF0K1CUGwlIFow==
+
+portfinder@^1.0.25:
+  version "1.0.28"
+  resolved "https://registry.yarnpkg.com/portfinder/-/portfinder-1.0.28.tgz#67c4622852bd5374dd1dd900f779f53462fac778"
+  integrity sha512-Se+2isanIcEqf2XMHjyUKskczxbPH7dQnlMjXX6+dybayyHvAf/TCgyMRlzf/B6QDhAEFOGes0pzRo3by4AbMA==
+  dependencies:
+    async "^2.6.2"
+    debug "^3.1.1"
+    mkdirp "^0.5.5"
+
+posix-character-classes@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
+  integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
+
+prelude-ls@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
+  integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
+
+preserve@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
+  integrity sha1-gV7R9uvGWSb4ZbMQwHE7yzMVzks=
+
+pretty-format@^23.6.0:
+  version "23.6.0"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-23.6.0.tgz#5eaac8eeb6b33b987b7fe6097ea6a8a146ab5760"
+  integrity sha512-zf9NV1NSlDLDjycnwm6hpFATCGl/K1lt0R/GdkAK2O5LN/rwJoB+Mh93gGJjut4YbmecbfgLWVGSTCr0Ewvvbw==
+  dependencies:
+    ansi-regex "^3.0.0"
+    ansi-styles "^3.2.0"
+
+private@^0.1.6:
+  version "0.1.8"
+  resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
+  integrity sha512-VvivMrbvd2nKkiG38qjULzlc+4Vx4wm/whI9pQD35YrARNnhxeiRktSOhSukRLFNlzg6Br/cJPet5J/u19r/mg==
+
+process-nextick-args@~1.0.6:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
+  integrity sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M=
+
+process-nextick-args@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.0.tgz#a37d732f4271b4ab1ad070d35508e8290788ffaa"
+  integrity sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw==
+
+process@^0.11.10:
+  version "0.11.10"
+  resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
+  integrity sha1-czIwDoQBYb2j5podHZGn1LwW8YI=
+
+progress@^1.1.8:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"
+  integrity sha1-4mDHj2Fhzdmw5WzD4Khd4Xx6V74=
+
+progress@^2.0.0, progress@^2.0.1:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/progress/-/progress-2.0.3.tgz#7e8cf8d8f5b8f239c1bc68beb4eb78567d572ef8"
+  integrity sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==
+
+promise-inflight@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/promise-inflight/-/promise-inflight-1.0.1.tgz#98472870bf228132fcbdd868129bad12c3c029e3"
+  integrity sha1-mEcocL8igTL8vdhoEputEsPAKeM=
+
+proxy-agent@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/proxy-agent/-/proxy-agent-2.0.0.tgz#57eb5347aa805d74ec681cb25649dba39c933499"
+  integrity sha1-V+tTR6qAXXTsaByyVknbo5yTNJk=
+  dependencies:
+    agent-base "2"
+    debug "2"
+    extend "3"
+    http-proxy-agent "1"
+    https-proxy-agent "1"
+    lru-cache "~2.6.5"
+    pac-proxy-agent "1"
+    socks-proxy-agent "2"
+
+proxy-from-env@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/proxy-from-env/-/proxy-from-env-1.0.0.tgz#33c50398f70ea7eb96d21f7b817630a55791c7ee"
+  integrity sha1-M8UDmPcOp+uW0h97gXYwpVeRx+4=
+
+prr@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/prr/-/prr-1.0.1.tgz#d3fc114ba06995a45ec6893f484ceb1d78f5f476"
+  integrity sha1-0/wRS6BplaRexok/SEzrHXj19HY=
+
+pseudomap@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
+  integrity sha1-8FKijacOYYkX7wqKw0wa5aaChrM=
+
+psl@^1.1.24:
+  version "1.1.31"
+  resolved "https://registry.yarnpkg.com/psl/-/psl-1.1.31.tgz#e9aa86d0101b5b105cbe93ac6b784cd547276184"
+  integrity sha512-/6pt4+C+T+wZUieKR620OpzN/LlnNKuWjy1iFLQ/UG35JqHlR/89MP1d96dUfkf6Dne3TuLQzOYEYshJ+Hx8mw==
+
+public-encrypt@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/public-encrypt/-/public-encrypt-4.0.3.tgz#4fcc9d77a07e48ba7527e7cbe0de33d0701331e0"
+  integrity sha512-zVpa8oKZSz5bTMTFClc1fQOnyyEzpl5ozpi1B5YcvBrdohMjH2rfsBtyXcuNuwjsDIXmBYlF2N5FlJYhR29t8Q==
+  dependencies:
+    bn.js "^4.1.0"
+    browserify-rsa "^4.0.0"
+    create-hash "^1.1.0"
+    parse-asn1 "^5.0.0"
+    randombytes "^2.0.1"
+    safe-buffer "^5.1.2"
+
+pump@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-2.0.1.tgz#12399add6e4cf7526d973cbc8b5ce2e2908b3909"
+  integrity sha512-ruPMNRkN3MHP1cWJc9OWr+T/xDP0jhXYCLfJcBuX54hhfIBnaQmAUMfDcG4DM5UMWByBbJY69QSphm3jtDKIkA==
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
+pump@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pump/-/pump-3.0.0.tgz#b4a2116815bde2f4e1ea602354e8c75565107a64"
+  integrity sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==
+  dependencies:
+    end-of-stream "^1.1.0"
+    once "^1.3.1"
+
+pumpify@^1.3.3:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/pumpify/-/pumpify-1.5.1.tgz#36513be246ab27570b1a374a5ce278bfd74370ce"
+  integrity sha512-oClZI37HvuUJJxSKKrC17bZ9Cu0ZYhEAGPsPUy9KlMUmv9dKX2o77RUmq7f3XjIxbwyGwYzbzQ1L2Ks8sIradQ==
+  dependencies:
+    duplexify "^3.6.0"
+    inherits "^2.0.3"
+    pump "^2.0.0"
+
+punycode@1.3.2:
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.3.2.tgz#9653a036fb7c1ee42342f2325cceefea3926c48d"
+  integrity sha1-llOgNvt8HuQjQvIyXM7v6jkmxI0=
+
+punycode@^1.2.4, punycode@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
+  integrity sha1-wNWmOycYgArY4esPpSachN1BhF4=
+
+punycode@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
+  integrity sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==
+
+puppeteer@^1.11.0:
+  version "1.11.0"
+  resolved "https://registry.yarnpkg.com/puppeteer/-/puppeteer-1.11.0.tgz#63cdbe12b07275cd6e0b94bce41f3fcb20305770"
+  integrity sha512-iG4iMOHixc2EpzqRV+pv7o3GgmU2dNYEMkvKwSaQO/vMZURakwSOn/EYJ6OIRFYOque1qorzIBvrytPIQB3YzQ==
+  dependencies:
+    debug "^4.1.0"
+    extract-zip "^1.6.6"
+    https-proxy-agent "^2.2.1"
+    mime "^2.0.3"
+    progress "^2.0.1"
+    proxy-from-env "^1.0.0"
+    rimraf "^2.6.1"
+    ws "^6.1.0"
+
+q@1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/q/-/q-1.4.1.tgz#55705bcd93c5f3673530c2c2cbc0c2b3addc286e"
+  integrity sha1-VXBbzZPF82c1MMLCy8DCs63cKG4=
+
+q@^1.4.1, q@^1.5.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/q/-/q-1.5.1.tgz#7e32f75b41381291d04611f1bf14109ac00651d7"
+  integrity sha1-fjL3W0E4EpHQRhHxvxQQmsAGUdc=
+
+qjobs@^1.1.4:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/qjobs/-/qjobs-1.2.0.tgz#c45e9c61800bd087ef88d7e256423bdd49e5d071"
+  integrity sha512-8YOJEHtxpySA3fFDyCRxA+UUV+fA+rTWnuWvylOK/NCjhY+b4ocCtmu8TtsWb+mYeU+GCHf/S66KZF/AsteKHg==
+
+qs@6.5.2, qs@~6.5.2:
+  version "6.5.2"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"
+  integrity sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==
+
+qs@^6.4.0:
+  version "6.9.4"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.9.4.tgz#9090b290d1f91728d3c22e54843ca44aea5ab687"
+  integrity sha512-A1kFqHekCTM7cz0udomYUoYNWjBebHm/5wzU/XqrBRBNWectVH0QIiN+NEcZ0Dte5hvzHwbr8+XQmguPhJ6WdQ==
+
+querystring-es3@^0.2.0:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
+  integrity sha1-nsYfeQSYdXB9aUFFlv2Qek1xHnM=
+
+querystring@0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
+  integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
+
+quick-lru@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-1.1.0.tgz#4360b17c61136ad38078397ff11416e186dcfbb8"
+  integrity sha1-Q2CxfGETatOAeDl/8RQW4Ybc+7g=
+
+randomatic@^3.0.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/randomatic/-/randomatic-3.1.1.tgz#b776efc59375984e36c537b2f51a1f0aff0da1ed"
+  integrity sha512-TuDE5KxZ0J461RVjrJZCJc+J+zCkTb1MbH9AQUq68sMhOMcy9jLcb3BrZKgp9q9Ncltdg4QVqWrH02W2EFFVYw==
+  dependencies:
+    is-number "^4.0.0"
+    kind-of "^6.0.0"
+    math-random "^1.0.1"
+
+randombytes@^2.0.0, randombytes@^2.0.1, randombytes@^2.0.5:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/randombytes/-/randombytes-2.0.6.tgz#d302c522948588848a8d300c932b44c24231da80"
+  integrity sha512-CIQ5OFxf4Jou6uOKe9t1AOgqpeU5fd70A8NPdHSGeYXqXsPe6peOwI0cUl88RWZ6sP1vPMV3avd/R6cZ5/sP1A==
+  dependencies:
+    safe-buffer "^5.1.0"
+
+randombytes@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/randombytes/-/randombytes-2.1.0.tgz#df6f84372f0270dc65cdf6291349ab7a473d4f2a"
+  integrity sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==
+  dependencies:
+    safe-buffer "^5.1.0"
+
+randomfill@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/randomfill/-/randomfill-1.0.4.tgz#c92196fc86ab42be983f1bf31778224931d61458"
+  integrity sha512-87lcbR8+MhcWcUiQ+9e+Rwx8MyR2P7qnt15ynUlbm3TU/fjbgz4GsvfSUDTemtCCtVCqb4ZcEFlyPNTh9bBTLw==
+  dependencies:
+    randombytes "^2.0.5"
+    safe-buffer "^5.1.0"
+
+range-parser@^1.0.3, range-parser@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.0.tgz#f49be6b487894ddc40dcc94a322f611092e00d5e"
+  integrity sha1-9JvmtIeJTdxA3MlKMi9hEJLgDV4=
+
+raw-body@2, raw-body@2.3.3:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-2.3.3.tgz#1b324ece6b5706e153855bc1148c65bb7f6ea0c3"
+  integrity sha512-9esiElv1BrZoI3rCDuOuKCBRbuApGGaDPQfjSflGxdy4oyzqghxu6klEkkVIvBje+FF0BX9coEv8KqW6X/7njw==
+  dependencies:
+    bytes "3.0.0"
+    http-errors "1.6.3"
+    iconv-lite "0.4.23"
+    unpipe "1.0.0"
+
+rc@^1.2.7:
+  version "1.2.8"
+  resolved "https://registry.yarnpkg.com/rc/-/rc-1.2.8.tgz#cd924bf5200a075b83c188cd6b9e211b7fc0d3ed"
+  integrity sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==
+  dependencies:
+    deep-extend "^0.6.0"
+    ini "~1.3.0"
+    minimist "^1.2.0"
+    strip-json-comments "~2.0.1"
+
+read-pkg-up@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-1.0.1.tgz#9d63c13276c065918d57f002a57f40a1b643fb02"
+  integrity sha1-nWPBMnbAZZGNV/ACpX9AobZD+wI=
+  dependencies:
+    find-up "^1.0.0"
+    read-pkg "^1.0.0"
+
+read-pkg-up@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-3.0.0.tgz#3ed496685dba0f8fe118d0691dc51f4a1ff96f07"
+  integrity sha1-PtSWaF26D4/hGNBpHcUfSh/5bwc=
+  dependencies:
+    find-up "^2.0.0"
+    read-pkg "^3.0.0"
+
+read-pkg-up@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg-up/-/read-pkg-up-4.0.0.tgz#1b221c6088ba7799601c808f91161c66e58f8978"
+  integrity sha512-6etQSH7nJGsK0RbG/2TeDzZFa8shjQ1um+SwQQ5cwKy0dhSXdOncEhb1CPpvQG4h7FyOV6EB6YlV0yJvZQNAkA==
+  dependencies:
+    find-up "^3.0.0"
+    read-pkg "^3.0.0"
+
+read-pkg@^1.0.0, read-pkg@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-1.1.0.tgz#f5ffaa5ecd29cb31c0474bca7d756b6bb29e3f28"
+  integrity sha1-9f+qXs0pyzHAR0vKfXVra7KePyg=
+  dependencies:
+    load-json-file "^1.0.0"
+    normalize-package-data "^2.3.2"
+    path-type "^1.0.0"
+
+read-pkg@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-3.0.0.tgz#9cbc686978fee65d16c00e2b19c237fcf6e38389"
+  integrity sha1-nLxoaXj+5l0WwA4rGcI3/Pbjg4k=
+  dependencies:
+    load-json-file "^4.0.0"
+    normalize-package-data "^2.3.2"
+    path-type "^3.0.0"
+
+"readable-stream@1 || 2", readable-stream@2, readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.4, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.0, readable-stream@^2.3.3, readable-stream@^2.3.6, readable-stream@~2.3.6:
+  version "2.3.6"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
+  integrity sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.3"
+    isarray "~1.0.0"
+    process-nextick-args "~2.0.0"
+    safe-buffer "~5.1.1"
+    string_decoder "~1.1.1"
+    util-deprecate "~1.0.1"
+
+readable-stream@1.1.x:
+  version "1.1.14"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.1.14.tgz#7cf4c54ef648e3813084c636dd2079e166c081d9"
+  integrity sha1-fPTFTvZI44EwhMY23SB54WbAgdk=
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "0.0.1"
+    string_decoder "~0.10.x"
+
+readable-stream@~2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
+  integrity sha1-j5A0HmilPMySh4jaz80Rs265t44=
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "~1.0.0"
+    process-nextick-args "~1.0.6"
+    string_decoder "~0.10.x"
+    util-deprecate "~1.0.1"
+
+readdirp@^2.0.0:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-2.2.1.tgz#0e87622a3325aa33e892285caf8b4e846529a525"
+  integrity sha512-1JU/8q+VgFZyxwrJ+SVIOsh+KywWGpds3NTqikiKpDMZWScmAYyKIgqkO+ARvNWJfXeXR1zxz7aHF4u4CyH6vQ==
+  dependencies:
+    graceful-fs "^4.1.11"
+    micromatch "^3.1.10"
+    readable-stream "^2.0.2"
+
+rechoir@^0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.6.2.tgz#85204b54dba82d5742e28c96756ef43af50e3384"
+  integrity sha1-hSBLVNuoLVdC4oyWdW70OvUOM4Q=
+  dependencies:
+    resolve "^1.1.6"
+
+redent@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/redent/-/redent-1.0.0.tgz#cf916ab1fd5f1f16dfb20822dd6ec7f730c2afde"
+  integrity sha1-z5Fqsf1fHxbfsggi3W7H9zDCr94=
+  dependencies:
+    indent-string "^2.1.0"
+    strip-indent "^1.0.1"
+
+redent@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/redent/-/redent-2.0.0.tgz#c1b2007b42d57eb1389079b3c8333639d5e1ccaa"
+  integrity sha1-wbIAe0LVfrE4kHmzyDM2OdXhzKo=
+  dependencies:
+    indent-string "^3.0.0"
+    strip-indent "^2.0.0"
+
+regenerate-unicode-properties@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/regenerate-unicode-properties/-/regenerate-unicode-properties-7.0.0.tgz#107405afcc4a190ec5ed450ecaa00ed0cafa7a4c"
+  integrity sha512-s5NGghCE4itSlUS+0WUj88G6cfMVMmH8boTPNvABf8od+2dhT9WDlWu8n01raQAJZMOK8Ch6jSexaRO7swd6aw==
+  dependencies:
+    regenerate "^1.4.0"
+
+regenerate@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.0.tgz#4a856ec4b56e4077c557589cae85e7a4c8869a11"
+  integrity sha512-1G6jJVDWrt0rK99kBjvEtziZNCICAuvIPkSiUFIQxVP06RCVpq3dmDo2oi6ABpYaDYaTRr67BEhL8r1wgEZZKg==
+
+regenerator-runtime@^0.10.0:
+  version "0.10.5"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz#336c3efc1220adcedda2c9fab67b5a7955a33658"
+  integrity sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=
+
+regenerator-runtime@^0.11.0:
+  version "0.11.1"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"
+  integrity sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg==
+
+regenerator-transform@^0.13.3:
+  version "0.13.3"
+  resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.13.3.tgz#264bd9ff38a8ce24b06e0636496b2c856b57bcbb"
+  integrity sha512-5ipTrZFSq5vU2YoGoww4uaRVAK4wyYC4TSICibbfEPOruUu8FFP7ErV0BjmbIOEpn3O/k9na9UEdYR/3m7N6uA==
+  dependencies:
+    private "^0.1.6"
+
+regex-cache@^0.4.2:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/regex-cache/-/regex-cache-0.4.4.tgz#75bdc58a2a1496cec48a12835bc54c8d562336dd"
+  integrity sha512-nVIZwtCjkC9YgvWkpM55B5rBhBYRZhAaJbgcFYXXsHnbZ9UZI9nnVWYZpBlCqv9ho2eZryPnWrZGsOdPwVWXWQ==
+  dependencies:
+    is-equal-shallow "^0.1.3"
+
+regex-not@^1.0.0, regex-not@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/regex-not/-/regex-not-1.0.2.tgz#1f4ece27e00b0b65e0247a6810e6a85d83a5752c"
+  integrity sha512-J6SDjUgDxQj5NusnOtdFxDwN/+HWykR8GELwctJ7mdqhcyy1xEc4SRFHUXvxTp661YaVKAjfRLZ9cCqS6tn32A==
+  dependencies:
+    extend-shallow "^3.0.2"
+    safe-regex "^1.1.0"
+
+regexpp@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-2.0.1.tgz#8d19d31cf632482b589049f8281f93dbcba4d07f"
+  integrity sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==
+
+regexpu-core@^4.1.3, regexpu-core@^4.2.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-4.4.0.tgz#8d43e0d1266883969720345e70c275ee0aec0d32"
+  integrity sha512-eDDWElbwwI3K0Lo6CqbQbA6FwgtCz4kYTarrri1okfkRLZAqstU+B3voZBCjg8Fl6iq0gXrJG6MvRgLthfvgOA==
+  dependencies:
+    regenerate "^1.4.0"
+    regenerate-unicode-properties "^7.0.0"
+    regjsgen "^0.5.0"
+    regjsparser "^0.6.0"
+    unicode-match-property-ecmascript "^1.0.4"
+    unicode-match-property-value-ecmascript "^1.0.2"
+
+regjsgen@^0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/regjsgen/-/regjsgen-0.5.0.tgz#a7634dc08f89209c2049adda3525711fb97265dd"
+  integrity sha512-RnIrLhrXCX5ow/E5/Mh2O4e/oa1/jW0eaBKTSy3LaCj+M3Bqvm97GWDp2yUtzIs4LEn65zR2yiYGFqb2ApnzDA==
+
+regjsparser@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/regjsparser/-/regjsparser-0.6.0.tgz#f1e6ae8b7da2bae96c99399b868cd6c933a2ba9c"
+  integrity sha512-RQ7YyokLiQBomUJuUG8iGVvkgOLxwyZM8k6d3q5SAXpg4r5TZJZigKFvC6PpD+qQ98bCDC5YelPeA3EucDoNeQ==
+  dependencies:
+    jsesc "~0.5.0"
+
+remove-trailing-separator@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz#c24bce2a283adad5bc3f58e0d48249b92379d8ef"
+  integrity sha1-wkvOKig62tW8P1jg1IJJuSN52O8=
+
+repeat-element@^1.1.2:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/repeat-element/-/repeat-element-1.1.3.tgz#782e0d825c0c5a3bb39731f84efee6b742e6b1ce"
+  integrity sha512-ahGq0ZnV5m5XtZLMb+vP76kcAM5nkLqk0lpqAuojSKGgQtn4eRi4ZZGm2olo2zKFH+sMsWaqOCW1dqAnOru72g==
+
+repeat-string@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-0.2.2.tgz#c7a8d3236068362059a7e4651fc6884e8b1fb4ae"
+  integrity sha1-x6jTI2BoNiBZp+RlH8aITosftK4=
+
+repeat-string@^1.5.2, repeat-string@^1.6.1:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/repeat-string/-/repeat-string-1.6.1.tgz#8dcae470e1c88abc2d600fff4a776286da75e637"
+  integrity sha1-jcrkcOHIirwtYA//Sndihtp15jc=
+
+repeating@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/repeating/-/repeating-2.0.1.tgz#5214c53a926d3552707527fbab415dbc08d06dda"
+  integrity sha1-UhTFOpJtNVJwdSf7q0FdvAjQbdo=
+  dependencies:
+    is-finite "^1.0.0"
+
+request-progress@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/request-progress/-/request-progress-2.0.1.tgz#5d36bb57961c673aa5b788dbc8141fdf23b44e08"
+  integrity sha1-XTa7V5YcZzqlt4jbyBQf3yO0Tgg=
+  dependencies:
+    throttleit "^1.0.0"
+
+request@^2.81.0, request@^2.87.0, request@^2.88.0:
+  version "2.88.0"
+  resolved "https://registry.yarnpkg.com/request/-/request-2.88.0.tgz#9c2fca4f7d35b592efe57c7f0a55e81052124fef"
+  integrity sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==
+  dependencies:
+    aws-sign2 "~0.7.0"
+    aws4 "^1.8.0"
+    caseless "~0.12.0"
+    combined-stream "~1.0.6"
+    extend "~3.0.2"
+    forever-agent "~0.6.1"
+    form-data "~2.3.2"
+    har-validator "~5.1.0"
+    http-signature "~1.2.0"
+    is-typedarray "~1.0.0"
+    isstream "~0.1.2"
+    json-stringify-safe "~5.0.1"
+    mime-types "~2.1.19"
+    oauth-sign "~0.9.0"
+    performance-now "^2.1.0"
+    qs "~6.5.2"
+    safe-buffer "^5.1.2"
+    tough-cookie "~2.4.3"
+    tunnel-agent "^0.6.0"
+    uuid "^3.3.2"
+
+require-main-filename@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"
+  integrity sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=
+
+requires-port@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"
+  integrity sha1-kl0mAdOaxIXgkc8NpcbmlNw9yv8=
+
+resolve-dir@^0.1.0:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/resolve-dir/-/resolve-dir-0.1.1.tgz#b219259a5602fac5c5c496ad894a6e8cc430261e"
+  integrity sha1-shklmlYC+sXFxJatiUpujMQwJh4=
+  dependencies:
+    expand-tilde "^1.2.2"
+    global-modules "^0.2.3"
+
+resolve-from@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-4.0.0.tgz#4abcd852ad32dd7baabfe9b40e00a36db5f392e6"
+  integrity sha512-pb/MYmXstAkysRFx8piNI1tGFNQIFA3vkE3Gq4EuA1dF6gHp/+vgZqsCGJapvy8N3Q+4o7FwvquPJcnZ7RYy4g==
+
+resolve-url@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
+  integrity sha1-LGN/53yJOv0qZj/iGqkIAGjiBSo=
+
+resolve@1.1.x:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.1.7.tgz#203114d82ad2c5ed9e8e0411b3932875e889e97b"
+  integrity sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=
+
+resolve@^1.1.6, resolve@^1.3.2, resolve@^1.3.3, resolve@^1.8.1:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.9.0.tgz#a14c6fdfa8f92a7df1d996cb7105fa744658ea06"
+  integrity sha512-TZNye00tI67lwYvzxCxHGjwTNlUV70io54/Ed4j6PscB8xVfuBJpRenI/o6dVk0cY0PYTY27AgCoGGxRnYuItQ==
+  dependencies:
+    path-parse "^1.0.6"
+
+restore-cursor@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-1.0.1.tgz#34661f46886327fed2991479152252df92daa541"
+  integrity sha1-NGYfRohjJ/7SmRR5FSJS35LapUE=
+  dependencies:
+    exit-hook "^1.0.0"
+    onetime "^1.0.0"
+
+restore-cursor@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-2.0.0.tgz#9f7ee287f82fd326d4fd162923d62129eee0dfaf"
+  integrity sha1-n37ih/gv0ybU/RYpI9YhKe7g368=
+  dependencies:
+    onetime "^2.0.0"
+    signal-exit "^3.0.2"
+
+ret@~0.1.10:
+  version "0.1.15"
+  resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
+  integrity sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==
+
+rfdc@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/rfdc/-/rfdc-1.1.2.tgz#e6e72d74f5dc39de8f538f65e00c36c18018e349"
+  integrity sha512-92ktAgvZhBzYTIK0Mja9uen5q5J3NRVMoDkJL2VMwq6SXjVCgqvQeVP2XAaUY6HT+XpQYeLSjb3UoitBryKmdA==
+
+right-pad@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/right-pad/-/right-pad-1.0.1.tgz#8ca08c2cbb5b55e74dafa96bf7fd1a27d568c8d0"
+  integrity sha1-jKCMLLtbVedNr6lr9/0aJ9VoyNA=
+
+rimraf@^2.2.8, rimraf@^2.5.4, rimraf@^2.6.0, rimraf@^2.6.1, rimraf@^2.6.2, rimraf@~2.6.2:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.3.tgz#b2d104fe0d8fb27cf9e0a1cda8262dd3833c6cab"
+  integrity sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==
+  dependencies:
+    glob "^7.1.3"
+
+ripemd160@^2.0.0, ripemd160@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-2.0.2.tgz#a1c1a6f624751577ba5d07914cbc92850585890c"
+  integrity sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==
+  dependencies:
+    hash-base "^3.0.0"
+    inherits "^2.0.1"
+
+rollup-plugin-alias@^1.3.1:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-alias/-/rollup-plugin-alias-1.5.1.tgz#80cce3a967befda5b09c86abc14a043a78035b46"
+  integrity sha512-pQTYBRNfLedoVOO7AYHNegIavEIp4jKTga5jUi1r//KYgHKGWgG4qJXYhbcWKt2k1FwGlR5wCYoY+IFkme0t4A==
+  dependencies:
+    slash "^2.0.0"
+
+rollup-plugin-buble@^0.19.6:
+  version "0.19.6"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-buble/-/rollup-plugin-buble-0.19.6.tgz#55ee0995d8870d536f01f4277c3eef4276e8747e"
+  integrity sha512-El5Fut4/wEO17ZN/n9BZvqd7DXXB2WbJr/DKvr89LXChC/cHllE0XwiUDeAalrTkgr0WrnyLDTCQvEv+cGywWQ==
+  dependencies:
+    buble "^0.19.6"
+    rollup-pluginutils "^2.3.3"
+
+rollup-plugin-commonjs@^9.2.0:
+  version "9.2.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-commonjs/-/rollup-plugin-commonjs-9.2.0.tgz#4604e25069e0c78a09e08faa95dc32dec27f7c89"
+  integrity sha512-0RM5U4Vd6iHjL6rLvr3lKBwnPsaVml+qxOGaaNUWN1lSq6S33KhITOfHmvxV3z2vy9Mk4t0g4rNlVaJJsNQPWA==
+  dependencies:
+    estree-walker "^0.5.2"
+    magic-string "^0.25.1"
+    resolve "^1.8.1"
+    rollup-pluginutils "^2.3.3"
+
+rollup-plugin-flow-no-whitespace@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-flow-no-whitespace/-/rollup-plugin-flow-no-whitespace-1.0.0.tgz#bd4ba1bcd99ad5b88234d72e6e2dacea9aa02d16"
+  integrity sha1-vUuhvNma1biCNNcubi2s6pqgLRY=
+  dependencies:
+    flow-remove-types-no-whitespace "^1.0.3"
+    rollup-pluginutils "^1.5.2"
+
+rollup-plugin-node-resolve@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-node-resolve/-/rollup-plugin-node-resolve-4.0.0.tgz#9bc6b8205e9936cc0e26bba2415f1ecf1e64d9b2"
+  integrity sha512-7Ni+/M5RPSUBfUaP9alwYQiIKnKeXCOHiqBpKUl9kwp3jX5ZJtgXAait1cne6pGEVUUztPD6skIKH9Kq9sNtfw==
+  dependencies:
+    builtin-modules "^3.0.0"
+    is-module "^1.0.0"
+    resolve "^1.8.1"
+
+rollup-plugin-replace@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-replace/-/rollup-plugin-replace-2.1.0.tgz#f9c07a4a89a2f8be912ee54b3f0f68d91e9ed0ae"
+  integrity sha512-SxrAIgpH/B5/W4SeULgreOemxcpEgKs2gcD42zXw50bhqGWmcnlXneVInQpAqzA/cIly4bJrOpeelmB9p4YXSQ==
+  dependencies:
+    magic-string "^0.25.1"
+    minimatch "^3.0.2"
+    rollup-pluginutils "^2.0.1"
+
+rollup-pluginutils@^1.5.2:
+  version "1.5.2"
+  resolved "https://registry.yarnpkg.com/rollup-pluginutils/-/rollup-pluginutils-1.5.2.tgz#1e156e778f94b7255bfa1b3d0178be8f5c552408"
+  integrity sha1-HhVud4+UtyVb+hs9AXi+j1xVJAg=
+  dependencies:
+    estree-walker "^0.2.1"
+    minimatch "^3.0.2"
+
+rollup-pluginutils@^2.0.1, rollup-pluginutils@^2.3.3:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/rollup-pluginutils/-/rollup-pluginutils-2.3.3.tgz#3aad9b1eb3e7fe8262820818840bf091e5ae6794"
+  integrity sha512-2XZwja7b6P5q4RZ5FhyX1+f46xi1Z3qBKigLRZ6VTZjwbN0K1IFGMlwm06Uu0Emcre2Z63l77nq/pzn+KxIEoA==
+  dependencies:
+    estree-walker "^0.5.2"
+    micromatch "^2.3.11"
+
+rollup@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.0.2.tgz#df88abda5cfe96afaa07dbd540510f87e60d1baf"
+  integrity sha512-FkkSrWUVo1WliS+/GIgEmKQPILubgVdBRTWampfdhkasxx7sM2nfwSfKiX3paIBVnN0HG3DvkTy13RfjkyBX9w==
+  dependencies:
+    "@types/estree" "0.0.39"
+    "@types/node" "*"
+    acorn "^6.0.4"
+
+run-async@^2.2.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/run-async/-/run-async-2.3.0.tgz#0371ab4ae0bdd720d4166d7dfda64ff7a445a6c0"
+  integrity sha1-A3GrSuC91yDUFm19/aZP96RFpsA=
+  dependencies:
+    is-promise "^2.1.0"
+
+run-queue@^1.0.0, run-queue@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/run-queue/-/run-queue-1.0.3.tgz#e848396f057d223f24386924618e25694161ec47"
+  integrity sha1-6Eg5bwV9Ij8kOGkkYY4laUFh7Ec=
+  dependencies:
+    aproba "^1.1.1"
+
+rx@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/rx/-/rx-4.1.0.tgz#a5f13ff79ef3b740fe30aa803fb09f98805d4782"
+  integrity sha1-pfE/957zt0D+MKqAP7CfmIBdR4I=
+
+rxjs@^6.1.0, rxjs@^6.3.3:
+  version "6.3.3"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.3.3.tgz#3c6a7fa420e844a81390fb1158a9ec614f4bad55"
+  integrity sha512-JTWmoY9tWCs7zvIk/CvRjhjGaOd+OVBM987mxFo+OW66cGpdKjZcpmc74ES1sB//7Kl/PAe8+wEakuhG4pcgOw==
+  dependencies:
+    tslib "^1.9.0"
+
+safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
+safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+
+safe-regex@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/safe-regex/-/safe-regex-1.1.0.tgz#40a3669f3b077d1e943d44629e157dd48023bf2e"
+  integrity sha1-QKNmnzsHfR6UPURinhV91IAjvy4=
+  dependencies:
+    ret "~0.1.10"
+
+"safer-buffer@>= 2.1.2 < 3", safer-buffer@^2.0.2, safer-buffer@^2.1.0, safer-buffer@~2.1.0:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+  integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
+
+sauce-connect-launcher@^1.2.4:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/sauce-connect-launcher/-/sauce-connect-launcher-1.2.4.tgz#8d38f85242a9fbede1b2303b559f7e20c5609a1c"
+  integrity sha512-X2vfwulR6brUGiicXKxPm1GJ7dBEeP1II450Uv4bHGrcGOapZNgzJvn9aioea5IC5BPp/7qjKdE3xbbTBIVXMA==
+  dependencies:
+    adm-zip "~0.4.3"
+    async "^2.1.2"
+    https-proxy-agent "^2.2.1"
+    lodash "^4.16.6"
+    rimraf "^2.5.4"
+
+saucelabs@^1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/saucelabs/-/saucelabs-1.5.0.tgz#9405a73c360d449b232839919a86c396d379fd9d"
+  integrity sha512-jlX3FGdWvYf4Q3LFfFWS1QvPg3IGCGWxIc8QBFdPTbpTJnt/v17FHXYVAn7C8sHf1yUXo2c7yIM0isDryfYtHQ==
+  dependencies:
+    https-proxy-agent "^2.2.1"
+
+sax@>=0.6.0, sax@^1.2.4:
+  version "1.2.4"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
+  integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
+
+schema-utils@^0.4.4:
+  version "0.4.7"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-0.4.7.tgz#ba74f597d2be2ea880131746ee17d0a093c68187"
+  integrity sha512-v/iwU6wvwGK8HbU9yi3/nhGzP0yGSuhQMzL6ySiec1FSrZZDkhm4noOSWzrNFo/jEc+SJY6jRTwuwbSXJPDUnQ==
+  dependencies:
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
+
+schema-utils@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
+  integrity sha512-i27Mic4KovM/lnGsy8whRCHhc7VicJajAjTrYg11K9zfZXnYIt4k5F+kZkwjnrhKzLic/HLU4j11mjsz2G/75g==
+  dependencies:
+    ajv "^6.1.0"
+    ajv-errors "^1.0.0"
+    ajv-keywords "^3.1.0"
+
+secure-compare@3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/secure-compare/-/secure-compare-3.0.1.tgz#f1a0329b308b221fae37b9974f3d578d0ca999e3"
+  integrity sha1-8aAymzCLIh+uN7mXTz1XjQypmeM=
+
+selenium-server@^2.53.1:
+  version "2.53.1"
+  resolved "https://registry.yarnpkg.com/selenium-server/-/selenium-server-2.53.1.tgz#d681528812f3c2e0531a6b7e613e23bb02cce8a6"
+  integrity sha1-1oFSiBLzwuBTGmt+YT4juwLM6KY=
+
+selenium-webdriver@^4.0.0-alpha.1:
+  version "4.0.0-alpha.1"
+  resolved "https://registry.yarnpkg.com/selenium-webdriver/-/selenium-webdriver-4.0.0-alpha.1.tgz#cc93415e21d2dc1dfd85dfc5f6b55f3ac53933b1"
+  integrity sha512-z88rdjHAv3jmTZ7KSGUkTvo4rGzcDGMq0oXWHNIDK96Gs31JKVdu9+FMtT4KBrVoibg8dUicJDok6GnqqttO5Q==
+  dependencies:
+    jszip "^3.1.3"
+    rimraf "^2.5.4"
+    tmp "0.0.30"
+    xml2js "^0.4.17"
+
+semver-compare@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/semver-compare/-/semver-compare-1.0.0.tgz#0dee216a1c941ab37e9efb1788f6afc5ff5537fc"
+  integrity sha1-De4hahyUGrN+nvsXiPavxf9VN/w=
+
+"semver@2 || 3 || 4 || 5", semver@^5.3.0, semver@^5.4.1, semver@^5.5.0, semver@^5.5.1:
+  version "5.6.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.6.0.tgz#7e74256fbaa49c75aa7c7a205cc22799cac80004"
+  integrity sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==
+
+semver@~5.0.1:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.0.3.tgz#77466de589cd5d3c95f138aa78bc569a3cb5d27a"
+  integrity sha1-d0Zt5YnNXTyV8TiqeLxWmjy10no=
+
+serialize-javascript@^1.4.0:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-1.6.1.tgz#4d1f697ec49429a847ca6f442a2a755126c4d879"
+  integrity sha512-A5MOagrPFga4YaKQSWHryl7AXvbQkEqpw4NNYMTNYUNV51bA8ABHgYFpqKx+YFFrw59xMV1qGH1R4AgoNIVgCw==
+
+serialize-javascript@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/serialize-javascript/-/serialize-javascript-3.1.0.tgz#8bf3a9170712664ef2561b44b691eafe399214ea"
+  integrity sha512-JIJT1DGiWmIKhzRsG91aS6Ze4sFUrYbltlkg2onR5OrnNM02Kl/hnY/T4FN2omvyeBbQmMJv+K4cPOpGzOTFBg==
+  dependencies:
+    randombytes "^2.1.0"
+
+set-blocking@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
+  integrity sha1-BF+XgtARrppoA93TgrJDkrPYkPc=
+
+set-value@^0.4.3:
+  version "0.4.3"
+  resolved "https://registry.yarnpkg.com/set-value/-/set-value-0.4.3.tgz#7db08f9d3d22dc7f78e53af3c3bf4666ecdfccf1"
+  integrity sha1-fbCPnT0i3H945Trzw79GZuzfzPE=
+  dependencies:
+    extend-shallow "^2.0.1"
+    is-extendable "^0.1.1"
+    is-plain-object "^2.0.1"
+    to-object-path "^0.3.0"
+
+set-value@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/set-value/-/set-value-2.0.0.tgz#71ae4a88f0feefbbf52d1ea604f3fb315ebb6274"
+  integrity sha512-hw0yxk9GT/Hr5yJEYnHNKYXkIA8mVJgd9ditYZCe16ZczcaELYYcfvaXesNACk2O8O0nTiPQcQhGUQj8JLzeeg==
+  dependencies:
+    extend-shallow "^2.0.1"
+    is-extendable "^0.1.1"
+    is-plain-object "^2.0.3"
+    split-string "^3.0.1"
+
+setimmediate@^1.0.4:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"
+  integrity sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU=
+
+setprototypeof@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.1.0.tgz#d0bd85536887b6fe7c0d818cb962d9d91c54e656"
+  integrity sha512-BvE/TwpZX4FXExxOxZyRGQQv651MSwmWKZGqvmPcRIjDqWub67kTKuIMx43cZZrS/cBBzwBcNDWoFxt2XEFIpQ==
+
+sha.js@^2.4.0, sha.js@^2.4.8:
+  version "2.4.11"
+  resolved "https://registry.yarnpkg.com/sha.js/-/sha.js-2.4.11.tgz#37a5cf0b81ecbc6943de109ba2960d1b26584ae7"
+  integrity sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==
+  dependencies:
+    inherits "^2.0.1"
+    safe-buffer "^5.0.1"
+
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  integrity sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=
+  dependencies:
+    shebang-regex "^1.0.0"
+
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+  integrity sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=
+
+shelljs@0.7.6:
+  version "0.7.6"
+  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.6.tgz#379cccfb56b91c8601e4793356eb5382924de9ad"
+  integrity sha1-N5zM+1a5HIYB5HkzVutTgpJN6a0=
+  dependencies:
+    glob "^7.0.0"
+    interpret "^1.0.0"
+    rechoir "^0.6.2"
+
+shelljs@^0.8.1:
+  version "0.8.3"
+  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.3.tgz#a7f3319520ebf09ee81275b2368adb286659b097"
+  integrity sha512-fc0BKlAWiLpwZljmOvAOTE/gXawtCoNrP5oaY7KIaQbbyHeQVg01pSEuEGvGh3HEdBU4baCD7wQBwADmM/7f7A==
+  dependencies:
+    glob "^7.0.0"
+    interpret "^1.0.0"
+    rechoir "^0.6.2"
+
+signal-exit@^3.0.0, signal-exit@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
+  integrity sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=
+
+simple-git@^1.85.0:
+  version "1.107.0"
+  resolved "https://registry.yarnpkg.com/simple-git/-/simple-git-1.107.0.tgz#12cffaf261c14d6f450f7fdb86c21ccee968b383"
+  integrity sha512-t4OK1JRlp4ayKRfcW6owrWcRVLyHRUlhGd0uN6ZZTqfDq8a5XpcUdOKiGRNobHEuMtNqzp0vcJNvhYWwh5PsQA==
+  dependencies:
+    debug "^4.0.1"
+
+slash@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/slash/-/slash-2.0.0.tgz#de552851a1759df3a8f206535442f5ec4ddeab44"
+  integrity sha512-ZYKh3Wh2z1PpEXWr0MpSBZ0V6mZHAQfYevttO11c51CaWjGTaadiKZ+wVt1PbMlDV5qhMFslpZCemhwOK7C89A==
+
+slice-ansi@0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-0.0.4.tgz#edbf8903f66f7ce2f8eafd6ceed65e264c831b35"
+  integrity sha1-7b+JA/ZvfOL46v1s7tZeJkyDGzU=
+
+slice-ansi@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-2.0.0.tgz#5373bdb8559b45676e8541c66916cdd6251612e7"
+  integrity sha512-4j2WTWjp3GsZ+AOagyzVbzp4vWGtZ0hEZ/gDY/uTvm6MTxUfTUIsnMIFb1bn8o0RuXiqUw15H1bue8f22Vw2oQ==
+  dependencies:
+    ansi-styles "^3.2.0"
+    astral-regex "^1.0.0"
+    is-fullwidth-code-point "^2.0.0"
+
+smart-buffer@^1.0.13:
+  version "1.1.15"
+  resolved "https://registry.yarnpkg.com/smart-buffer/-/smart-buffer-1.1.15.tgz#7f114b5b65fab3e2a35aa775bb12f0d1c649bf16"
+  integrity sha1-fxFLW2X6s+KjWqd1uxLw0cZJvxY=
+
+snapdragon-node@^2.0.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/snapdragon-node/-/snapdragon-node-2.1.1.tgz#6c175f86ff14bdb0724563e8f3c1b021a286853b"
+  integrity sha512-O27l4xaMYt/RSQ5TR3vpWCAB5Kb/czIcqUFOM/C4fYcLnbZUc1PkjTAMjof2pBWaSTwOUd6qUHcFGVGj7aIwnw==
+  dependencies:
+    define-property "^1.0.0"
+    isobject "^3.0.0"
+    snapdragon-util "^3.0.1"
+
+snapdragon-util@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/snapdragon-util/-/snapdragon-util-3.0.1.tgz#f956479486f2acd79700693f6f7b805e45ab56e2"
+  integrity sha512-mbKkMdQKsjX4BAL4bRYTj21edOf8cN7XHdYUJEe+Zn99hVEYcMvKPct1IqNe7+AZPirn8BCDOQBHQZknqmKlZQ==
+  dependencies:
+    kind-of "^3.2.0"
+
+snapdragon@^0.8.1:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/snapdragon/-/snapdragon-0.8.2.tgz#64922e7c565b0e14204ba1aa7d6964278d25182d"
+  integrity sha512-FtyOnWN/wCHTVXOMwvSv26d+ko5vWlIDD6zoUJ7LW8vh+ZBC8QdljveRP+crNrtBwioEUWy/4dMtbBjA4ioNlg==
+  dependencies:
+    base "^0.11.1"
+    debug "^2.2.0"
+    define-property "^0.2.5"
+    extend-shallow "^2.0.1"
+    map-cache "^0.2.2"
+    source-map "^0.5.6"
+    source-map-resolve "^0.5.0"
+    use "^3.1.0"
+
+socket.io-adapter@~1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/socket.io-adapter/-/socket.io-adapter-1.1.1.tgz#2a805e8a14d6372124dd9159ad4502f8cb07f06b"
+  integrity sha1-KoBeihTWNyEk3ZFZrUUC+MsH8Gs=
+
+socket.io-client@2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/socket.io-client/-/socket.io-client-2.1.1.tgz#dcb38103436ab4578ddb026638ae2f21b623671f"
+  integrity sha512-jxnFyhAuFxYfjqIgduQlhzqTcOEQSn+OHKVfAxWaNWa7ecP7xSNk2Dx/3UEsDcY7NcFafxvNvKPmmO7HTwTxGQ==
+  dependencies:
+    backo2 "1.0.2"
+    base64-arraybuffer "0.1.5"
+    component-bind "1.0.0"
+    component-emitter "1.2.1"
+    debug "~3.1.0"
+    engine.io-client "~3.2.0"
+    has-binary2 "~1.0.2"
+    has-cors "1.1.0"
+    indexof "0.0.1"
+    object-component "0.0.3"
+    parseqs "0.0.5"
+    parseuri "0.0.5"
+    socket.io-parser "~3.2.0"
+    to-array "0.1.4"
+
+socket.io-parser@~3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.2.0.tgz#e7c6228b6aa1f814e6148aea325b51aa9499e077"
+  integrity sha512-FYiBx7rc/KORMJlgsXysflWx/RIvtqZbyGLlHZvjfmPTPeuD/I8MaW7cfFrj5tRltICJdgwflhfZ3NVVbVLFQA==
+  dependencies:
+    component-emitter "1.2.1"
+    debug "~3.1.0"
+    isarray "2.0.1"
+
+socket.io@2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-2.1.1.tgz#a069c5feabee3e6b214a75b40ce0652e1cfb9980"
+  integrity sha512-rORqq9c+7W0DAK3cleWNSyfv/qKXV99hV4tZe+gGLfBECw3XEhBy7x85F3wypA9688LKjtwO9pX9L33/xQI8yA==
+  dependencies:
+    debug "~3.1.0"
+    engine.io "~3.2.0"
+    has-binary2 "~1.0.2"
+    socket.io-adapter "~1.1.0"
+    socket.io-client "2.1.1"
+    socket.io-parser "~3.2.0"
+
+socks-proxy-agent@2:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/socks-proxy-agent/-/socks-proxy-agent-2.1.1.tgz#86ebb07193258637870e13b7bd99f26c663df3d3"
+  integrity sha512-sFtmYqdUK5dAMh85H0LEVFUCO7OhJJe1/z2x/Z6mxp3s7/QPf1RkZmpZy+BpuU0bEjcV9npqKjq9Y3kwFUjnxw==
+  dependencies:
+    agent-base "2"
+    extend "3"
+    socks "~1.1.5"
+
+socks@~1.1.5:
+  version "1.1.10"
+  resolved "https://registry.yarnpkg.com/socks/-/socks-1.1.10.tgz#5b8b7fc7c8f341c53ed056e929b7bf4de8ba7b5a"
+  integrity sha1-W4t/x8jzQcU+0FbpKbe/Tei6e1o=
+  dependencies:
+    ip "^1.1.4"
+    smart-buffer "^1.0.13"
+
+source-list-map@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.1.tgz#3993bd873bfc48479cca9ea3a547835c7c154b34"
+  integrity sha512-qnQ7gVMxGNxsiL4lEuJwe/To8UnK7fAnmbGEEH8RpLouuKbeEm0lhbQVFIrNSuB+G7tVrAlVsZgETT5nljf+Iw==
+
+source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"
+  integrity sha512-MjqsvNwyz1s0k81Goz/9vRBe9SZdB09Bdw+/zYyO+3CuPk6fouTaxscHkgtE8jKvf01kVfl8riHzERQ/kefaSA==
+  dependencies:
+    atob "^2.1.1"
+    decode-uri-component "^0.2.0"
+    resolve-url "^0.2.1"
+    source-map-url "^0.4.0"
+    urix "^0.1.0"
+
+source-map-support@^0.5.9, source-map-support@~0.5.6:
+  version "0.5.9"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.9.tgz#41bc953b2534267ea2d605bccfa7bfa3111ced5f"
+  integrity sha512-gR6Rw4MvUlYy83vP0vxoVNzM6t8MUXqNuRsuBmBHQDu1Fh6X015FrLdgoDKcNdkwGubozq0P4N0Q37UyFVr1EA==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
+source-map-url@^0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
+  integrity sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=
+
+source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.6:
+  version "0.5.7"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
+  integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
+
+source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
+
+source-map@~0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.2.0.tgz#dab73fbcfc2ba819b4de03bd6f6eaa48164b3f9d"
+  integrity sha1-2rc/vPwrqBm03gO9b26qSBZLP50=
+  dependencies:
+    amdefine ">=0.0.4"
+
+sourcemap-codec@^1.4.1:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/sourcemap-codec/-/sourcemap-codec-1.4.4.tgz#c63ea927c029dd6bd9a2b7fa03b3fec02ad56e9f"
+  integrity sha512-CYAPYdBu34781kLHkaW3m6b/uUSyMOC2R61gcYMWooeuaGtjof86ZA/8T+qVPPt7np1085CR9hmMGrySwEc8Xg==
+
+spawn-sync@^1.0.15:
+  version "1.0.15"
+  resolved "https://registry.yarnpkg.com/spawn-sync/-/spawn-sync-1.0.15.tgz#b00799557eb7fb0c8376c29d44e8a1ea67e57476"
+  integrity sha1-sAeZVX63+wyDdsKdROih6mfldHY=
+  dependencies:
+    concat-stream "^1.4.7"
+    os-shim "^0.1.2"
+
+spdx-correct@^3.0.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.0.tgz#fb83e504445268f154b074e218c87c003cd31df4"
+  integrity sha512-lr2EZCctC2BNR7j7WzJ2FpDznxky1sjfxvvYEyzxNyb6lZXHODmEoJeFu4JupYlkfha1KZpJyoqiJ7pgA1qq8Q==
+  dependencies:
+    spdx-expression-parse "^3.0.0"
+    spdx-license-ids "^3.0.0"
+
+spdx-exceptions@^2.1.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/spdx-exceptions/-/spdx-exceptions-2.2.0.tgz#2ea450aee74f2a89bfb94519c07fcd6f41322977"
+  integrity sha512-2XQACfElKi9SlVb1CYadKDXvoajPgBVPn/gOQLrTvHdElaVhr7ZEbqJaRnJLVNeaI4cMEAgVCeBMKF6MWRDCRA==
+
+spdx-expression-parse@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/spdx-expression-parse/-/spdx-expression-parse-3.0.0.tgz#99e119b7a5da00e05491c9fa338b7904823b41d0"
+  integrity sha512-Yg6D3XpRD4kkOmTpdgbUiEJFKghJH03fiC1OPll5h/0sO6neh2jqRDVHOQ4o/LMea0tgCkbMgea5ip/e+MkWyg==
+  dependencies:
+    spdx-exceptions "^2.1.0"
+    spdx-license-ids "^3.0.0"
+
+spdx-license-ids@^3.0.0:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/spdx-license-ids/-/spdx-license-ids-3.0.3.tgz#81c0ce8f21474756148bbb5f3bfc0f36bf15d76e"
+  integrity sha512-uBIcIl3Ih6Phe3XHK1NqboJLdGfwr1UN3k6wSD1dZpmPsIkb8AGNbZYJ1fOBk834+Gxy8rpfDxrS6XLEMZMY2g==
+
+split-string@^3.0.1, split-string@^3.0.2:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/split-string/-/split-string-3.1.0.tgz#7cb09dda3a86585705c64b39a6466038682e8fe2"
+  integrity sha512-NzNVhJDYpwceVVii8/Hu6DKfD2G+NrQHlS/V/qgv763EYudVwEcMQNxd2lh+0VrUByXN/oJkl5grOhYWvQUYiw==
+  dependencies:
+    extend-shallow "^3.0.0"
+
+split2@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/split2/-/split2-2.2.0.tgz#186b2575bcf83e85b7d18465756238ee4ee42493"
+  integrity sha512-RAb22TG39LhI31MbreBgIuKiIKhVsawfTgEGqKHTK87aG+ul/PB8Sqoi3I7kVdRWiCfrKxK3uo4/YUkpNvhPbw==
+  dependencies:
+    through2 "^2.0.2"
+
+split@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/split/-/split-1.0.1.tgz#605bd9be303aa59fb35f9229fbea0ddec9ea07d9"
+  integrity sha512-mTyOoPbrivtXnwnIxZRFYRrPNtEFKlpB2fvjSnCQUiAA6qAZzqwna5envK4uk6OIeP17CsdF3rSBGYVBsU0Tkg==
+  dependencies:
+    through "2"
+
+sprintf-js@~1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
+  integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=
+
+sshpk@^1.7.0:
+  version "1.16.0"
+  resolved "https://registry.yarnpkg.com/sshpk/-/sshpk-1.16.0.tgz#1d4963a2fbffe58050aa9084ca20be81741c07de"
+  integrity sha512-Zhev35/y7hRMcID/upReIvRse+I9SVhyVre/KTJSJQWMz3C3+G+HpO7m1wK/yckEtujKZ7dS4hkVxAnmHaIGVQ==
+  dependencies:
+    asn1 "~0.2.3"
+    assert-plus "^1.0.0"
+    bcrypt-pbkdf "^1.0.0"
+    dashdash "^1.12.0"
+    ecc-jsbn "~0.1.1"
+    getpass "^0.1.1"
+    jsbn "~0.1.0"
+    safer-buffer "^2.0.2"
+    tweetnacl "~0.14.0"
+
+ssri@^6.0.1:
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/ssri/-/ssri-6.0.2.tgz#157939134f20464e7301ddba3e90ffa8f7728ac5"
+  integrity sha512-cepbSq/neFK7xB6A50KHN0xHDotYzq58wWCa5LeWqnPrHG8GzfEjO/4O8kpmcGW+oaxkvhEJCWgbgNk4/ZV93Q==
+  dependencies:
+    figgy-pudding "^3.5.1"
+
+staged-git-files@1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/staged-git-files/-/staged-git-files-1.1.2.tgz#4326d33886dc9ecfa29a6193bf511ba90a46454b"
+  integrity sha512-0Eyrk6uXW6tg9PYkhi/V/J4zHp33aNyi2hOCmhFLqLTIhbgqWn5jlSzI+IU0VqrZq6+DbHcabQl/WP6P3BG0QA==
+
+static-extend@^0.1.1:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/static-extend/-/static-extend-0.1.2.tgz#60809c39cbff55337226fd5e0b520f341f1fb5c6"
+  integrity sha1-YICcOcv/VTNyJv1eC1IPNB8ftcY=
+  dependencies:
+    define-property "^0.2.5"
+    object-copy "^0.1.0"
+
+"statuses@>= 1.4.0 < 2":
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
+  integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
+
+statuses@~1.3.1:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
+  integrity sha1-+vUbnrdKrvOzrPStX2Gr8ky3uT4=
+
+stream-browserify@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/stream-browserify/-/stream-browserify-2.0.1.tgz#66266ee5f9bdb9940a4e4514cafb43bb71e5c9db"
+  integrity sha1-ZiZu5fm9uZQKTkUUyvtDu3Hlyds=
+  dependencies:
+    inherits "~2.0.1"
+    readable-stream "^2.0.2"
+
+stream-each@^1.1.0:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/stream-each/-/stream-each-1.2.3.tgz#ebe27a0c389b04fbcc233642952e10731afa9bae"
+  integrity sha512-vlMC2f8I2u/bZGqkdfLQW/13Zihpej/7PmSiMQsbYddxuTsJp8vRe2x2FvVExZg7FaOds43ROAuFJwPR4MTZLw==
+  dependencies:
+    end-of-stream "^1.1.0"
+    stream-shift "^1.0.0"
+
+stream-http@^2.7.2:
+  version "2.8.3"
+  resolved "https://registry.yarnpkg.com/stream-http/-/stream-http-2.8.3.tgz#b2d242469288a5a27ec4fe8933acf623de6514fc"
+  integrity sha512-+TSkfINHDo4J+ZobQLWiMouQYB+UVYFttRA94FpEzzJ7ZdqcL4uUUQ7WkdkI4DSozGmgBUE/a47L+38PenXhUw==
+  dependencies:
+    builtin-status-codes "^3.0.0"
+    inherits "^2.0.1"
+    readable-stream "^2.3.6"
+    to-arraybuffer "^1.0.0"
+    xtend "^4.0.0"
+
+stream-shift@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/stream-shift/-/stream-shift-1.0.0.tgz#d5c752825e5367e786f78e18e445ea223a155952"
+  integrity sha1-1cdSgl5TZ+eG944Y5EXqIjoVWVI=
+
+streamroller@0.7.0:
+  version "0.7.0"
+  resolved "https://registry.yarnpkg.com/streamroller/-/streamroller-0.7.0.tgz#a1d1b7cf83d39afb0d63049a5acbf93493bdf64b"
+  integrity sha512-WREzfy0r0zUqp3lGO096wRuUp7ho1X6uo/7DJfTlEi0Iv/4gT7YHqXDjKC2ioVGBZtE8QzsQD9nx1nIuoZ57jQ==
+  dependencies:
+    date-format "^1.2.0"
+    debug "^3.1.0"
+    mkdirp "^0.5.1"
+    readable-stream "^2.3.0"
+
+string-argv@^0.0.2:
+  version "0.0.2"
+  resolved "https://registry.yarnpkg.com/string-argv/-/string-argv-0.0.2.tgz#dac30408690c21f3c3630a3ff3a05877bdcbd736"
+  integrity sha1-2sMECGkMIfPDYwo/86BYd73L1zY=
+
+string-width@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
+  integrity sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=
+  dependencies:
+    code-point-at "^1.0.0"
+    is-fullwidth-code-point "^1.0.0"
+    strip-ansi "^3.0.0"
+
+"string-width@^1.0.2 || 2", string-width@^2.0.0, string-width@^2.1.0, string-width@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string-width/-/string-width-2.1.1.tgz#ab93f27a8dc13d28cac815c462143a6d9012ae9e"
+  integrity sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==
+  dependencies:
+    is-fullwidth-code-point "^2.0.0"
+    strip-ansi "^4.0.0"
+
+string_decoder@^1.0.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.2.0.tgz#fe86e738b19544afe70469243b2a1ee9240eae8d"
+  integrity sha512-6YqyX6ZWEYguAxgZzHGL7SsCeGx3V2TtOTqZz1xSTSWnqsbWwbptafNyvf/ACquZUXV3DANr5BDIwNYe1mN42w==
+  dependencies:
+    safe-buffer "~5.1.0"
+
+string_decoder@~0.10.x:
+  version "0.10.31"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
+  integrity sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=
+
+string_decoder@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
+  integrity sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==
+  dependencies:
+    safe-buffer "~5.1.0"
+
+stringify-object@^3.2.2:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/stringify-object/-/stringify-object-3.3.0.tgz#703065aefca19300d3ce88af4f5b3956d7556629"
+  integrity sha512-rHqiFh1elqCQ9WPLIC8I0Q/g/wj5J1eMkyoiD6eoQApWHP0FtlK7rqnhmabL5VUY9JQCcqwwvlOaSuutekgyrw==
+  dependencies:
+    get-own-enumerable-property-symbols "^3.0.0"
+    is-obj "^1.0.1"
+    is-regexp "^1.0.0"
+
+strip-ansi@^3.0.0, strip-ansi@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-3.0.1.tgz#6a385fb8853d952d5ff05d0e8aaf94278dc63dcf"
+  integrity sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=
+  dependencies:
+    ansi-regex "^2.0.0"
+
+strip-ansi@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-4.0.0.tgz#a8479022eb1ac368a871389b635262c505ee368f"
+  integrity sha1-qEeQIusaw2iocTibY1JixQXuNo8=
+  dependencies:
+    ansi-regex "^3.0.0"
+
+strip-ansi@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-5.0.0.tgz#f78f68b5d0866c20b2c9b8c61b5298508dc8756f"
+  integrity sha512-Uu7gQyZI7J7gn5qLn1Np3G9vcYGTVqB+lFTytnDJv83dd8T22aGH451P3jueT2/QemInJDfxHB5Tde5OzgG1Ow==
+  dependencies:
+    ansi-regex "^4.0.0"
+
+strip-bom@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-2.0.0.tgz#6219a85616520491f35788bdbf1447a99c7e6b0e"
+  integrity sha1-YhmoVhZSBJHzV4i9vxRHqZx+aw4=
+  dependencies:
+    is-utf8 "^0.2.0"
+
+strip-bom@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
+  integrity sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=
+
+strip-eof@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
+  integrity sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=
+
+strip-indent@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-1.0.1.tgz#0c7962a6adefa7bbd4ac366460a638552ae1a0a2"
+  integrity sha1-DHlipq3vp7vUrDZkYKY4VSrhoKI=
+  dependencies:
+    get-stdin "^4.0.1"
+
+strip-indent@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-2.0.0.tgz#5ef8db295d01e6ed6cbf7aab96998d7822527b68"
+  integrity sha1-XvjbKV0B5u1sv3qrlpmNeCJSe2g=
+
+strip-json-comments@2.0.1, strip-json-comments@^2.0.1, strip-json-comments@~2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
+  integrity sha1-PFMZQukIwml8DsNEhYwobHygpgo=
+
+supports-color@3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.1.2.tgz#72a262894d9d408b956ca05ff37b2ed8a6e2a2d5"
+  integrity sha1-cqJiiU2dQIuVbKBf83su2KbiotU=
+  dependencies:
+    has-flag "^1.0.0"
+
+supports-color@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
+  integrity sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=
+
+supports-color@^3.1.0:
+  version "3.2.3"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.2.3.tgz#65ac0504b3954171d8a64946b2ae3cbb8a5f54f6"
+  integrity sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=
+  dependencies:
+    has-flag "^1.0.0"
+
+supports-color@^5.3.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==
+  dependencies:
+    has-flag "^3.0.0"
+
+symbol-observable@^1.1.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.2.0.tgz#c22688aed4eab3cdc2dfeacbb561660560a00804"
+  integrity sha512-e900nM8RRtGhlV36KGEU9k65K3mPb1WV70OdjfxlG2EAuM1noi/E/BaW/uMhL7bPEssK8QV57vN3esixjUvcXQ==
+
+table@^5.0.2:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/table/-/table-5.1.1.tgz#92030192f1b7b51b6eeab23ed416862e47b70837"
+  integrity sha512-NUjapYb/qd4PeFW03HnAuOJ7OMcBkJlqeClWxeNlQ0lXGSb52oZXGzkO0/I0ARegQ2eUT1g2VDJH0eUxDRcHmw==
+  dependencies:
+    ajv "^6.6.1"
+    lodash "^4.17.11"
+    slice-ansi "2.0.0"
+    string-width "^2.1.1"
+
+tapable@^1.0.0, tapable@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/tapable/-/tapable-1.1.1.tgz#4d297923c5a72a42360de2ab52dadfaaec00018e"
+  integrity sha512-9I2ydhj8Z9veORCw5PRm4u9uebCn0mcCa6scWoNcbZ6dAtoo2618u9UUzxgmsCOreJpqDDuv61LvwofW7hLcBA==
+
+tar@^4:
+  version "4.4.19"
+  resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.19.tgz#2e4d7263df26f2b914dee10c825ab132123742f3"
+  integrity sha512-a20gEsvHnWe0ygBY8JbxoM4w3SJdhc7ZAuxkLqh+nvNQN2IOt0B5lLgM490X5Hl8FF0dl0tOf2ewFYAlIFgzVA==
+  dependencies:
+    chownr "^1.1.4"
+    fs-minipass "^1.2.7"
+    minipass "^2.9.0"
+    minizlib "^1.3.3"
+    mkdirp "^0.5.5"
+    safe-buffer "^5.2.1"
+    yallist "^3.1.1"
+
+tcp-port-used@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/tcp-port-used/-/tcp-port-used-1.0.1.tgz#46061078e2d38c73979a2c2c12b5a674e6689d70"
+  integrity sha512-rwi5xJeU6utXoEIiMvVBMc9eJ2/ofzB+7nLOdnZuFTmNCLqRiQh2sMG9MqCxHU/69VC/Fwp5dV9306Qd54ll1Q==
+  dependencies:
+    debug "4.1.0"
+    is2 "2.0.1"
+
+terser-webpack-plugin@^1.1.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.2.1.tgz#7545da9ae5f4f9ae6a0ac961eb46f5e7c845cc26"
+  integrity sha512-GGSt+gbT0oKcMDmPx4SRSfJPE1XaN3kQRWG4ghxKQw9cn5G9x6aCKSsgYdvyM0na9NJ4Drv0RG6jbBByZ5CMjw==
+  dependencies:
+    cacache "^11.0.2"
+    find-cache-dir "^2.0.0"
+    schema-utils "^1.0.0"
+    serialize-javascript "^1.4.0"
+    source-map "^0.6.1"
+    terser "^3.8.1"
+    webpack-sources "^1.1.0"
+    worker-farm "^1.5.2"
+
+terser@^3.10.2, terser@^3.8.1:
+  version "3.14.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.14.1.tgz#cc4764014af570bc79c79742358bd46926018a32"
+  integrity sha512-NSo3E99QDbYSMeJaEk9YW2lTg3qS9V0aKGlb+PlOrei1X02r1wSBHCNX/O+yeTRFSWPKPIGj6MqvvdqV4rnVGw==
+  dependencies:
+    commander "~2.17.1"
+    source-map "~0.6.1"
+    source-map-support "~0.5.6"
+
+test-exclude@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-5.0.0.tgz#cdce7cece785e0e829cd5c2b27baf18bc583cfb7"
+  integrity sha512-bO3Lj5+qFa9YLfYW2ZcXMOV1pmQvw+KS/DpjqhyX6Y6UZ8zstpZJ+mA2ERkXfpOqhxsJlQiLeVXD3Smsrs6oLw==
+  dependencies:
+    arrify "^1.0.1"
+    minimatch "^3.0.4"
+    read-pkg-up "^4.0.0"
+    require-main-filename "^1.0.1"
+
+text-extensions@^1.0.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/text-extensions/-/text-extensions-1.9.0.tgz#1853e45fee39c945ce6f6c36b2d659b5aabc2a26"
+  integrity sha512-wiBrwC1EhBelW12Zy26JeOUkQ5mRu+5o8rpsJk5+2t+Y5vE7e842qtZDQ2g1NpX/29HdyFeJ4nSIhI47ENSxlQ==
+
+text-table@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
+  integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
+
+throttleit@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/throttleit/-/throttleit-1.0.0.tgz#9e785836daf46743145a5984b6268d828528ac6c"
+  integrity sha1-nnhYNtr0Z0MUWlmEtiaNgoUorGw=
+
+through2@^2.0.0, through2@^2.0.2:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.5.tgz#01c1e39eb31d07cb7d03a96a70823260b23132cd"
+  integrity sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==
+  dependencies:
+    readable-stream "~2.3.6"
+    xtend "~4.0.1"
+
+through@2, "through@>=2.2.7 <3", through@^2.3.6:
+  version "2.3.8"
+  resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
+  integrity sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=
+
+thunkify@~2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/thunkify/-/thunkify-2.1.2.tgz#faa0e9d230c51acc95ca13a361ac05ca7e04553d"
+  integrity sha1-+qDp0jDFGsyVyhOjYawFyn4EVT0=
+
+timers-browserify@^2.0.4:
+  version "2.0.10"
+  resolved "https://registry.yarnpkg.com/timers-browserify/-/timers-browserify-2.0.10.tgz#1d28e3d2aadf1d5a5996c4e9f95601cd053480ae"
+  integrity sha512-YvC1SV1XdOUaL6gx5CoGroT3Gu49pK9+TZ38ErPldOWW4j49GI1HKs9DV+KGq/w6y+LZ72W1c8cKz2vzY+qpzg==
+  dependencies:
+    setimmediate "^1.0.4"
+
+tmp@0.0.30:
+  version "0.0.30"
+  resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.30.tgz#72419d4a8be7d6ce75148fd8b324e593a711c2ed"
+  integrity sha1-ckGdSovn1s51FI/YsyTlk6cRwu0=
+  dependencies:
+    os-tmpdir "~1.0.1"
+
+tmp@0.0.33, tmp@0.0.x, tmp@^0.0.33:
+  version "0.0.33"
+  resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"
+  integrity sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==
+  dependencies:
+    os-tmpdir "~1.0.2"
+
+tmp@^0.0.29:
+  version "0.0.29"
+  resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.29.tgz#f25125ff0dd9da3ccb0c2dd371ee1288bb9128c0"
+  integrity sha1-8lEl/w3Z2jzLDC3Tce4SiLuRKMA=
+  dependencies:
+    os-tmpdir "~1.0.1"
+
+to-array@0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/to-array/-/to-array-0.1.4.tgz#17e6c11f73dd4f3d74cda7a4ff3238e9ad9bf890"
+  integrity sha1-F+bBH3PdTz10zaek/zI46a2b+JA=
+
+to-arraybuffer@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
+  integrity sha1-fSKbH8xjfkZsoIEYCDanqr/4P0M=
+
+to-fast-properties@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-1.0.3.tgz#b83571fa4d8c25b82e231b06e3a3055de4ca1a47"
+  integrity sha1-uDVx+k2MJbguIxsG46MFXeTKGkc=
+
+to-fast-properties@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-2.0.0.tgz#dc5e698cbd079265bc73e0377681a4e4e83f616e"
+  integrity sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=
+
+to-object-path@^0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/to-object-path/-/to-object-path-0.3.0.tgz#297588b7b0e7e0ac08e04e672f85c1f4999e17af"
+  integrity sha1-KXWIt7Dn4KwI4E5nL4XB9JmeF68=
+  dependencies:
+    kind-of "^3.0.2"
+
+to-regex-range@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-2.1.1.tgz#7c80c17b9dfebe599e27367e0d4dd5590141db38"
+  integrity sha1-fIDBe53+vlmeJzZ+DU3VWQFB2zg=
+  dependencies:
+    is-number "^3.0.0"
+    repeat-string "^1.6.1"
+
+to-regex@^3.0.1, to-regex@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/to-regex/-/to-regex-3.0.2.tgz#13cfdd9b336552f30b51f33a8ae1b42a7a7599ce"
+  integrity sha512-FWtleNAtZ/Ki2qtqej2CXTOayOH9bHDQF+Q48VpWyDXjbYxA4Yz8iDB31zXOBUlOHHKidDbqGVrTUvQMPmBGBw==
+  dependencies:
+    define-property "^2.0.2"
+    extend-shallow "^3.0.2"
+    regex-not "^1.0.2"
+    safe-regex "^1.1.0"
+
+tough-cookie@~2.4.3:
+  version "2.4.3"
+  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.4.3.tgz#53f36da3f47783b0925afa06ff9f3b165280f781"
+  integrity sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==
+  dependencies:
+    psl "^1.1.24"
+    punycode "^1.4.1"
+
+trim-newlines@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-1.0.0.tgz#5887966bb582a4503a41eb524f7d35011815a613"
+  integrity sha1-WIeWa7WCpFA6QetST301ARgVphM=
+
+trim-newlines@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-2.0.0.tgz#b403d0b91be50c331dfc4b82eeceb22c3de16d20"
+  integrity sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA=
+
+trim-off-newlines@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/trim-off-newlines/-/trim-off-newlines-1.0.1.tgz#9f9ba9d9efa8764c387698bcbfeb2c848f11adb3"
+  integrity sha1-n5up2e+odkw4dpi8v+sshI8RrbM=
+
+trim-right@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
+  integrity sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=
+
+tslib@^1.9.0:
+  version "1.9.3"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.9.3.tgz#d7e4dd79245d85428c4d7e4822a79917954ca286"
+  integrity sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ==
+
+tty-browserify@0.0.0:
+  version "0.0.0"
+  resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.0.tgz#a157ba402da24e9bf957f9aa69d524eed42901a6"
+  integrity sha1-oVe6QC2iTpv5V/mqadUk7tQpAaY=
+
+tunnel-agent@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/tunnel-agent/-/tunnel-agent-0.6.0.tgz#27a5dea06b36b04a0a9966774b290868f0fc40fd"
+  integrity sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=
+  dependencies:
+    safe-buffer "^5.0.1"
+
+tweetnacl@^0.14.3, tweetnacl@~0.14.0:
+  version "0.14.5"
+  resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
+  integrity sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=
+
+type-check@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/type-check/-/type-check-0.3.2.tgz#5884cab512cf1d355e3fb784f30804b2b520db72"
+  integrity sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=
+  dependencies:
+    prelude-ls "~1.1.2"
+
+type-detect@0.1.1:
+  version "0.1.1"
+  resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-0.1.1.tgz#0ba5ec2a885640e470ea4e8505971900dac58822"
+  integrity sha1-C6XsKohWQORw6k6FBZcZANrFiCI=
+
+type-is@~1.6.16:
+  version "1.6.16"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.16.tgz#f89ce341541c672b25ee7ae3c73dee3b2be50194"
+  integrity sha512-HRkVv/5qY2G6I8iab9cI7v1bOIdhm94dVjQCPFElW9W+3GeDOSHmy2EBYe4VTApuzolPcmgFTN3ftVJRKR2J9Q==
+  dependencies:
+    media-typer "0.3.0"
+    mime-types "~2.1.18"
+
+typedarray@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
+  integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
+
+typescript@^3.6.4:
+  version "3.6.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.6.4.tgz#b18752bb3792bc1a0281335f7f6ebf1bbfc5b91d"
+  integrity sha512-unoCll1+l+YK4i4F8f22TaNVPRHcD9PA3yCuZ8g5e0qGqlVlJ/8FSateOLLSagn+Yg5+ZwuPkL8LFUc0Jcvksg==
+
+uglify-js@^3.1.4:
+  version "3.13.0"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.13.0.tgz#66ed69f7241f33f13531d3d51d5bcebf00df7f69"
+  integrity sha512-TWYSWa9T2pPN4DIJYbU9oAjQx+5qdV5RUDxwARg8fmJZrD/V27Zj0JngW5xg1DFz42G0uDYl2XhzF6alSzD62w==
+
+ultron@~1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
+  integrity sha512-UIEXBNeYmKptWH6z8ZnqTeS8fV74zG0/eRU9VGkpzz+LIJNs8W/zM/L+7ctCkRrgbNnnR0xxw4bKOr0cW0N0Og==
+
+unicode-canonical-property-names-ecmascript@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/unicode-canonical-property-names-ecmascript/-/unicode-canonical-property-names-ecmascript-1.0.4.tgz#2619800c4c825800efdd8343af7dd9933cbe2818"
+  integrity sha512-jDrNnXWHd4oHiTZnx/ZG7gtUTVp+gCcTTKr8L0HjlwphROEW3+Him+IpvC+xcJEFegapiMZyZe02CyuOnRmbnQ==
+
+unicode-match-property-ecmascript@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/unicode-match-property-ecmascript/-/unicode-match-property-ecmascript-1.0.4.tgz#8ed2a32569961bce9227d09cd3ffbb8fed5f020c"
+  integrity sha512-L4Qoh15vTfntsn4P1zqnHulG0LdXgjSO035fEpdtp6YxXhMT51Q6vgM5lYdG/5X3MjS+k/Y9Xw4SFCY9IkR0rg==
+  dependencies:
+    unicode-canonical-property-names-ecmascript "^1.0.4"
+    unicode-property-aliases-ecmascript "^1.0.4"
+
+unicode-match-property-value-ecmascript@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-1.0.2.tgz#9f1dc76926d6ccf452310564fd834ace059663d4"
+  integrity sha512-Rx7yODZC1L/T8XKo/2kNzVAQaRE88AaMvI1EF/Xnj3GW2wzN6fop9DDWuFAKUVFH7vozkz26DzP0qyWLKLIVPQ==
+
+unicode-property-aliases-ecmascript@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-1.0.4.tgz#5a533f31b4317ea76f17d807fa0d116546111dd0"
+  integrity sha512-2WSLa6OdYd2ng8oqiGIWnJqyFArvhn+5vgx5GTxMbUYjCYKUcuKS62YLFF0R/BDGlB1yzXjQOLtPAfHsgirEpg==
+
+union-value@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/union-value/-/union-value-1.0.0.tgz#5c71c34cb5bad5dcebe3ea0cd08207ba5aa1aea4"
+  integrity sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=
+  dependencies:
+    arr-union "^3.1.0"
+    get-value "^2.0.6"
+    is-extendable "^0.1.1"
+    set-value "^0.4.3"
+
+union@~0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/union/-/union-0.5.0.tgz#b2c11be84f60538537b846edb9ba266ba0090075"
+  integrity sha512-N6uOhuW6zO95P3Mel2I2zMsbsanvvtgn6jVqJv4vbVcz/JN0OkL9suomjQGmWtxJQXOCqUJvquc1sMeNz/IwlA==
+  dependencies:
+    qs "^6.4.0"
+
+unique-filename@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/unique-filename/-/unique-filename-1.1.1.tgz#1d69769369ada0583103a1e6ae87681b56573230"
+  integrity sha512-Vmp0jIp2ln35UTXuryvjzkjGdRyf9b2lTXuSYUiPmzRcl3FDtYqAwOnTJkAngD9SWhnoJzDbTKwaOrZ+STtxNQ==
+  dependencies:
+    unique-slug "^2.0.0"
+
+unique-slug@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/unique-slug/-/unique-slug-2.0.1.tgz#5e9edc6d1ce8fb264db18a507ef9bd8544451ca6"
+  integrity sha512-n9cU6+gITaVu7VGj1Z8feKMmfAjEAQGhwD9fE3zvpRRa0wEIx8ODYkVGfSc94M2OX00tUFV8wH3zYbm1I8mxFg==
+  dependencies:
+    imurmurhash "^0.1.4"
+
+unpipe@1.0.0, unpipe@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
+  integrity sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=
+
+unset-value@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unset-value/-/unset-value-1.0.0.tgz#8376873f7d2335179ffb1e6fc3a8ed0dfc8ab559"
+  integrity sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=
+  dependencies:
+    has-value "^0.3.1"
+    isobject "^3.0.0"
+
+upath@^1.0.5:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/upath/-/upath-1.1.0.tgz#35256597e46a581db4793d0ce47fa9aebfc9fabd"
+  integrity sha512-bzpH/oBhoS/QI/YtbkqCg6VEiPYjSZtrHQM6/QnJS6OL9pKUFLqb3aFh4Scvwm45+7iAgiMkLhSbaZxUqmrprw==
+
+uri-js@^4.2.2:
+  version "4.4.1"
+  resolved "https://registry.yarnpkg.com/uri-js/-/uri-js-4.4.1.tgz#9b1a52595225859e55f669d928f88c6c57f2a77e"
+  integrity sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==
+  dependencies:
+    punycode "^2.1.0"
+
+urix@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
+  integrity sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=
+
+url-join@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-2.0.5.tgz#5af22f18c052a000a48d7b82c5e9c2e2feeda728"
+  integrity sha1-WvIvGMBSoACkjXuCxenC4v7tpyg=
+
+url@^0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
+  integrity sha1-ODjpfPxgUh63PFJajlW/3Z4uKPE=
+  dependencies:
+    punycode "1.3.2"
+    querystring "0.2.0"
+
+urlgrey@^0.4.4:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/urlgrey/-/urlgrey-0.4.4.tgz#892fe95960805e85519f1cd4389f2cb4cbb7652f"
+  integrity sha1-iS/pWWCAXoVRnxzUOJ8stMu3ZS8=
+
+use@^3.1.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
+  integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
+
+useragent@2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/useragent/-/useragent-2.3.0.tgz#217f943ad540cb2128658ab23fc960f6a88c9972"
+  integrity sha512-4AoH4pxuSvHCjqLO04sU6U/uE65BYza8l/KKBS0b0hnUPWi+cQ2BpeTEwejCSx9SPV5/U03nniDTrWx5NrmKdw==
+  dependencies:
+    lru-cache "4.1.x"
+    tmp "0.0.x"
+
+util-deprecate@~1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
+  integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=
+
+util.promisify@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/util.promisify/-/util.promisify-1.0.0.tgz#440f7165a459c9a16dc145eb8e72f35687097030"
+  integrity sha512-i+6qA2MPhvoKLuxnJNpXAGhg7HphQOSUq2LKMZD0m15EiskXUkMvKdF4Uui0WYeCUGea+o2cw/ZuwehtfsrNkA==
+  dependencies:
+    define-properties "^1.1.2"
+    object.getownpropertydescriptors "^2.0.3"
+
+util@0.10.3:
+  version "0.10.3"
+  resolved "https://registry.yarnpkg.com/util/-/util-0.10.3.tgz#7afb1afe50805246489e3db7fe0ed379336ac0f9"
+  integrity sha1-evsa/lCAUkZInj23/g7TeTNqwPk=
+  dependencies:
+    inherits "2.0.1"
+
+util@^0.10.3:
+  version "0.10.4"
+  resolved "https://registry.yarnpkg.com/util/-/util-0.10.4.tgz#3aa0125bfe668a4672de58857d3ace27ecb76901"
+  integrity sha512-0Pm9hTQ3se5ll1XihRic3FDIku70C+iHUdT/W926rSgHV5QgXsYbKZN8MSC3tJtSkhuROzvsQjAaFENRXr+19A==
+  dependencies:
+    inherits "2.0.3"
+
+utils-merge@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
+  integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
+
+uuid@^3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
+  integrity sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==
+
+validate-npm-package-license@^3.0.1:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz#fc91f6b9c7ba15c857f4cb2c5defeec39d4f410a"
+  integrity sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==
+  dependencies:
+    spdx-correct "^3.0.0"
+    spdx-expression-parse "^3.0.0"
+
+verror@1.10.0:
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/verror/-/verror-1.10.0.tgz#3a105ca17053af55d6e270c1f8288682e18da400"
+  integrity sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=
+  dependencies:
+    assert-plus "^1.0.0"
+    core-util-is "1.0.2"
+    extsprintf "^1.2.0"
+
+vlq@^0.2.1:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/vlq/-/vlq-0.2.3.tgz#8f3e4328cf63b1540c0d67e1b2778386f8975b26"
+  integrity sha512-DRibZL6DsNhIgYQ+wNdWDL2SL3bKPlVrRiBqV5yuMm++op8W4kGFtaQfCs4KEJn0wBZcHVHJ3eoywX8983k1ow==
+
+vlq@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/vlq/-/vlq-1.0.0.tgz#8101be90843422954c2b13eb27f2f3122bdcc806"
+  integrity sha512-o3WmXySo+oI5thgqr7Qy8uBkT/v9Zr+sRyrh1lr8aWPUkgDWdWt4Nae2WKBrLsocgE8BuWWD0jLc+VW8LeU+2g==
+
+vm-browserify@0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/vm-browserify/-/vm-browserify-0.0.4.tgz#5d7ea45bbef9e4a6ff65f95438e0a87c357d5a73"
+  integrity sha1-XX6kW7755Kb/ZflUOOCofDV9WnM=
+  dependencies:
+    indexof "0.0.1"
+
+void-elements@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/void-elements/-/void-elements-2.0.1.tgz#c066afb582bb1cb4128d60ea92392e94d5e9dbec"
+  integrity sha1-wGavtYK7HLQSjWDqkjkulNXp2+w=
+
+watchpack@^1.5.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/watchpack/-/watchpack-1.6.0.tgz#4bc12c2ebe8aa277a71f1d3f14d685c7b446cd00"
+  integrity sha512-i6dHe3EyLjMmDlU1/bGQpEw25XSjkJULPuAVKCbNRefQVq48yXKUpwg538F7AZTf9kyr57zj++pQFltUa5H7yA==
+  dependencies:
+    chokidar "^2.0.2"
+    graceful-fs "^4.1.2"
+    neo-async "^2.5.0"
+
+webpack-dev-middleware@^3.2.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/webpack-dev-middleware/-/webpack-dev-middleware-3.5.0.tgz#fff0a07b0461314fb6ca82df3642c2423f768429"
+  integrity sha512-1Zie7+dMr4Vv3nGyhr8mxGQkzTQK1PTS8K3yJ4yB1mfRGwO1DzQibgmNfUqbEfQY6eEtEEUzC+o7vhpm/Sfn5w==
+  dependencies:
+    memory-fs "~0.4.1"
+    mime "^2.3.1"
+    range-parser "^1.0.3"
+    webpack-log "^2.0.0"
+
+webpack-log@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/webpack-log/-/webpack-log-2.0.0.tgz#5b7928e0637593f119d32f6227c1e0ac31e1b47f"
+  integrity sha512-cX8G2vR/85UYG59FgkoMamwHUIkSSlV3bBMRsbxVXVUk2j6NleCKjQ/WE9eYg9WY4w25O9w8wKP4rzNZFmUcUg==
+  dependencies:
+    ansi-colors "^3.0.0"
+    uuid "^3.3.2"
+
+webpack-sources@^1.1.0, webpack-sources@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.3.0.tgz#2a28dcb9f1f45fe960d8f1493252b5ee6530fa85"
+  integrity sha512-OiVgSrbGu7NEnEvQJJgdSFPl2qWKkWq5lHMhgiToIiN9w34EBnjYzSYs+VbL5KoYiLNtFFa7BZIKxRED3I32pA==
+  dependencies:
+    source-list-map "^2.0.0"
+    source-map "~0.6.1"
+
+webpack@~4.28.4:
+  version "4.28.4"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.28.4.tgz#1ddae6c89887d7efb752adf0c3cd32b9b07eacd0"
+  integrity sha512-NxjD61WsK/a3JIdwWjtIpimmvE6UrRi3yG54/74Hk9rwNj5FPkA4DJCf1z4ByDWLkvZhTZE+P3C/eh6UD5lDcw==
+  dependencies:
+    "@webassemblyjs/ast" "1.7.11"
+    "@webassemblyjs/helper-module-context" "1.7.11"
+    "@webassemblyjs/wasm-edit" "1.7.11"
+    "@webassemblyjs/wasm-parser" "1.7.11"
+    acorn "^5.6.2"
+    acorn-dynamic-import "^3.0.0"
+    ajv "^6.1.0"
+    ajv-keywords "^3.1.0"
+    chrome-trace-event "^1.0.0"
+    enhanced-resolve "^4.1.0"
+    eslint-scope "^4.0.0"
+    json-parse-better-errors "^1.0.2"
+    loader-runner "^2.3.0"
+    loader-utils "^1.1.0"
+    memory-fs "~0.4.1"
+    micromatch "^3.1.8"
+    mkdirp "~0.5.0"
+    neo-async "^2.5.0"
+    node-libs-browser "^2.0.0"
+    schema-utils "^0.4.4"
+    tapable "^1.1.0"
+    terser-webpack-plugin "^1.1.0"
+    watchpack "^1.5.0"
+    webpack-sources "^1.3.0"
+
+weex-js-runtime@^0.23.6:
+  version "0.23.7"
+  resolved "https://registry.yarnpkg.com/weex-js-runtime/-/weex-js-runtime-0.23.7.tgz#c9d3427f2debf1d638ab4e41bb4f0e539a51915c"
+  integrity sha512-3BFd5GXTo0X/GWh0KjzXDpIcPJuSwYuc9fE9llgez35IfVHs/nUmfkFBjifzxOJS2YLhtKf0Cy8eTQ00CJDWZA==
+
+weex-styler@^0.3.0:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/weex-styler/-/weex-styler-0.3.1.tgz#47d0188cc70aff97ccaa3a63b98733d549848680"
+  integrity sha512-xkX5/wS/QLiJXKwbdpeytbLN0kHviQwj9CLdvBxqu+RRZABZpTniKZr1oxjh9Q0+n/aRC+smwFpQpUKvXh9V1g==
+  dependencies:
+    css "~2.2.1"
+
+which@^1.1.1, which@^1.2.1, which@^1.2.10, which@^1.2.12, which@^1.2.9:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
+  integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==
+  dependencies:
+    isexe "^2.0.0"
+
+wide-align@^1.1.0:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/wide-align/-/wide-align-1.1.3.tgz#ae074e6bdc0c14a431e804e624549c633b000457"
+  integrity sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==
+  dependencies:
+    string-width "^1.0.2 || 2"
+
+word-wrap@^1.0.3:
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"
+  integrity sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==
+
+wordwrap@^1.0.0, wordwrap@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
+  integrity sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=
+
+wordwrap@~0.0.2:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
+  integrity sha1-o9XabNXAvAAI03I0u68b7WMFkQc=
+
+worker-farm@^1.5.2:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/worker-farm/-/worker-farm-1.6.0.tgz#aecc405976fab5a95526180846f0dba288f3a4a0"
+  integrity sha512-6w+3tHbM87WnSWnENBUvA2pxJPLhQUg5LKwUQHq3r+XPhIM+Gh2R5ycbwPCyuGbNg+lPgdcnQUhuC02kJCvffQ==
+  dependencies:
+    errno "~0.1.7"
+
+wrap-ansi@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-3.0.1.tgz#288a04d87eda5c286e060dfe8f135ce8d007f8ba"
+  integrity sha1-KIoE2H7aXChuBg3+jxNc6NAH+Lo=
+  dependencies:
+    string-width "^2.1.1"
+    strip-ansi "^4.0.0"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+  integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
+
+write@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/write/-/write-0.2.1.tgz#5fc03828e264cea3fe91455476f7a3c566cb0757"
+  integrity sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=
+  dependencies:
+    mkdirp "^0.5.1"
+
+ws@^6.1.0:
+  version "6.1.2"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.2.tgz#3cc7462e98792f0ac679424148903ded3b9c3ad8"
+  integrity sha512-rfUqzvz0WxmSXtJpPMX2EeASXabOrSMk1ruMOV3JBTBjo4ac2lDjGGsbQSyxj8Odhw5fBib8ZKEjDNvgouNKYw==
+  dependencies:
+    async-limiter "~1.0.0"
+
+ws@~3.3.1:
+  version "3.3.3"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
+  integrity sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==
+  dependencies:
+    async-limiter "~1.0.0"
+    safe-buffer "~5.1.0"
+    ultron "~1.1.0"
+
+xml2js@^0.4.17:
+  version "0.4.19"
+  resolved "https://registry.yarnpkg.com/xml2js/-/xml2js-0.4.19.tgz#686c20f213209e94abf0d1bcf1efaa291c7827a7"
+  integrity sha512-esZnJZJOiJR9wWKMyuvSE1y6Dq5LCuJanqhxslH2bxM6duahNZ+HMpCLhBQGZkbX6xRf8x1Y2eJlgt2q3qo49Q==
+  dependencies:
+    sax ">=0.6.0"
+    xmlbuilder "~9.0.1"
+
+xmlbuilder@~9.0.1:
+  version "9.0.7"
+  resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz#132ee63d2ec5565c557e20f4c22df9aca686b10d"
+  integrity sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0=
+
+xmlhttprequest-ssl@~1.5.4:
+  version "1.5.5"
+  resolved "https://registry.yarnpkg.com/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz#c2876b06168aadc40e57d97e81191ac8f4398b3e"
+  integrity sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=
+
+xregexp@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/xregexp/-/xregexp-2.0.0.tgz#52a63e56ca0b84a7f3a5f3d61872f126ad7a5943"
+  integrity sha1-UqY+VsoLhKfzpfPWGHLxJq16WUM=
+
+xtend@^4.0.0, xtend@~4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
+  integrity sha1-pcbVMr5lbiPbgg77lDofBJmNY68=
+
+y18n@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.1.tgz#8db2b83c31c5d75099bb890b23f3094891e247d4"
+  integrity sha512-wNcy4NvjMYL8gogWWYAO7ZFWFfHcbdbE57tZO8e4cbpj8tfUcwrwqSl3ad8HxpYWCdXcJUCeKKZS62Av1affwQ==
+
+yallist@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"
+  integrity sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=
+
+yallist@^3.0.0, yallist@^3.0.2, yallist@^3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.1.1.tgz#dbb7daf9bfd8bac9ab45ebf602b8cbad0d5d08fd"
+  integrity sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==
+
+yauzl@2.4.1:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/yauzl/-/yauzl-2.4.1.tgz#9528f442dab1b2284e58b4379bb194e22e0c4005"
+  integrity sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=
+  dependencies:
+    fd-slicer "~1.0.1"
+
+yeast@0.1.2:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"
+  integrity sha1-AI4G2AlDIMNy28L47XagymyKxBk=
+
+yorkie@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/yorkie/-/yorkie-2.0.0.tgz#92411912d435214e12c51c2ae1093e54b6bb83d9"
+  integrity sha512-jcKpkthap6x63MB4TxwCyuIGkV0oYP/YRyuQU5UO0Yz/E/ZAu+653/uov+phdmO54n6BcvFRyyt0RRrWdN2mpw==
+  dependencies:
+    execa "^0.8.0"
+    is-ci "^1.0.10"
+    normalize-path "^1.0.0"
+    strip-indent "^2.0.0"