webpack.config.js

var webpack = require('webpack')
var path = require('path')




/*
 * SplitChunksPlugin is enabled by default and replaced
 * deprecated CommonsChunkPlugin. It automatically identifies modules which
 * should be splitted of chunk by heuristics using module duplication count and
 * module category (i. e. node_modules). And splits the chunks…
 *
 * It is safe to remove "splitChunks" from the generated configuration
 * and was added as an educational example.
 *
 * https://webpack.js.org/plugins/split-chunks-plugin/
 *
 */

/*
 * We've enabled UglifyJSPlugin for you! This minifies your app
 * in order to load faster and run less javascript.
 *
 * https://github.com/webpack-contrib/uglifyjs-webpack-plugin
 *
 */

var UglifyJSPlugin = require('uglifyjs-webpack-plugin');




module.exports = {
  module: {
    rules: []
  },

  entry: "./index.js",

  output: {
    filename: 'browser.js',
    path: path.resolve(__dirname, 'browser'),
    libraryTarget: "commonjs2"
  },

  mode: 'production',
  plugins: [
    new UglifyJSPlugin(),
    new webpack.IgnorePlugin(/fs/),
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        vendors: {
          priority: -10,
          test: /[\\/]node_modules[\\/]/
        }
      },

      chunks: 'async',
      minChunks: 1,
      minSize: 30000,
      name: true
    }
  }
}