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rollup.config.js
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rollup.config.js
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import nodeResolve from '@rollup/plugin-node-resolve'
import { resolve } from 'path'
import commonjs from '@rollup/plugin-commonjs'
import json from '@rollup/plugin-json'
import typescript from 'rollup-plugin-typescript2'
import pkg from './package.json'
import { terser } from 'rollup-plugin-terser'
import { babel } from '@rollup/plugin-babel'
function getOutputFileName(fileName, isProd = false) {
return isProd ? fileName.replace(/\.js$/, '.min.js') : fileName
}
const env = process.env.NODE_ENV || 'development'
const ROOT = resolve(__dirname, '.')
const PLUGINS = [
typescript({
useTsconfigDeclarationDir: true,
tsconfigOverride: {
allowJs: false,
include: ['src'],
exclude: ['tests', 'examples', '*.js', 'scripts'],
},
}),
]
module.exports = [
// browser-friendly UMD build
{
input: 'src/index.ts', // directory to transpilation of typescript
external: ['cross-fetch', 'cross-fetch/polyfill'],
output: {
name: 'window',
extend: true,
file: getOutputFileName(
// will add .min. in filename if in production env
resolve(ROOT, pkg.browser),
env === 'production'
),
format: 'umd',
sourcemap: env === 'production', // create sourcemap for error reporting in production mode
},
plugins: [
...PLUGINS,
babel({
babelrc: false,
extensions: ['.ts'],
presets: [
[
'@babel/preset-env',
{
modules: false,
targets: {
browsers: ['last 2 versions', 'ie >= 11'],
},
},
],
],
}),
nodeResolve({
mainFields: ['jsnext', 'main'],
preferBuiltins: true,
browser: true,
}),
commonjs({
include: ['node_modules/**'],
}),
// nodePolyfills
json(),
env === 'production' ? terser() : {}, // will minify the file in production mode
],
},
// CommonJS (for Node) and ES module (for bundlers) build.
// (We could have three entries in the configuration array
// instead of two, but it's quicker to generate multiple
// builds from a single configuration where possible, using
// an array for the `output` option, where we can specify
// `file` and `format` for each target)
{
input: 'src/index.ts',
external: ['cross-fetch', 'cross-fetch/polyfill'],
output: [
{
file: getOutputFileName(
resolve(ROOT, pkg.module),
env === 'production'
),
exports: 'named',
format: 'es',
sourcemap: env === 'production', // create sourcemap for error reporting in production mode
},
],
plugins: [
env === 'production' ? terser() : {}, // will minify the file in production mode
...PLUGINS,
],
},
]