index.js

'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.

const path = require('path')

module.exports = {
  //开发环境配置
  dev: {

    // Paths
    assetsSubDirectory: 'static',
    // 编译发布的根目录，可配置为资源服务器域名或 CDN 域名
    assetsPublicPath: '/',
    //代理端口
    proxyTable: {},

    // Various Dev Server settings
    host: '0.0.0.0', // can be overwritten by process.env.HOST
    port: 8080, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
    //在项目启动时是否自动打开浏览器
    autoOpenBrowser: false,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-

    
    /**
     * Source Maps
     */

    // https://webpack.js.org/configuration/devtool/#development
    devtool: 'cheap-module-eval-source-map',

    // If you have problems debugging vue-files in devtools,
    // set this to false - it *may* help
    // https://vue-loader.vuejs.org/en/options.html#cachebusting
    cacheBusting: true,
    //默认情况下，关闭 CSS Sourcemaps，因为使用相对路径会报错。
    cssSourceMap: true
  },

  //正式环境配置
  build: {
    // Template for index.html 构建输出的 index.html 文件
    index: path.resolve(__dirname, '../dist/index.html'),

    // Paths 构建输出的静态资源路径 
    assetsRoot: path.resolve(__dirname, '../dist'),
    // 构建输出的二级目录
    assetsSubDirectory: 'static/',
    // 构建发布的根目录，可配置为资源服务器域名或 CDN 域名http://www.jasonlee.top/webPro/ja1
    assetsPublicPath: 'https://www.jasonlee.top/webPro/ja1/',

    /**
     * Source Maps
     */
    // 是否开启 cssSourceMap
    productionSourceMap: true,
    // https://webpack.js.org/configuration/devtool/#production
    devtool: '#source-map',

    // Gzip off by default as many popular static hosts such as
    // Surge or Netlify already gzip all static assets for you.
    // Before setting to `true`, make sure to:
    // npm install --save-dev compression-webpack-plugin  默认关闭 gzip，因为很多流行的静态资源主机，例如 Surge、Netlify，已经为所有静态资源开启 gzip
    productionGzip: false,
    // 需要使用 gzip 压缩的文件扩展名
    productionGzipExtensions: ['js', 'css'],

    // Run the build command with an extra argument to
    // View the bundle analyzer report after build finishes:
    // `npm run build --report`
    // Set to `true` or `false` to always turn it on or off
    // 运行“build”命令行时，加上一个参数，可以在构建完成后参看包分析报告
    // true 为开启，false 为关闭
    bundleAnalyzerReport: process.env.npm_config_report
  }
}