webpack.config.js

const path = require('path')
const webpack = require('webpack')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')

module.exports = env => {

return{
  mode: env.NODE_ENV,
  devtool: 'inline-source-map',
  entry: {
    popup: './src/popup.js',
    setup: './src/setup.js',
    background: './src/background.js',
    update: './src/update.js'
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        include: [
          path.resolve(__dirname, './src'),
          /pretty-bytes/ // <- ES6 module
        ],
        loader: 'babel-loader'
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader
          },
          'css-loader'
        ]
      },
      {
        test: /\.(ico|eot|otf|webp|ttf|woff|woff2)(\?.*)?$/,
        use: 'file-loader?limit=100000'
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/i,
        use: [
          'file-loader?limit=100000',
          {
            loader: 'img-loader',
            options: {
              enabled: true,
              optipng: true
            }
          }
        ]
      }
    ]
  },
  stats: {
    children: false,
    chunks: false,
    chunkModules: false,
    chunkOrigins: false,
    modules: false
  },
  performance: {
    hints: false
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css'
    }),
    new HtmlWebpackPlugin({
      inject: true,
      chunks: ['popup'],
      filename: 'popup.html',
      template: './src/popup.html'
    }),
    new HtmlWebpackPlugin({
      inject: true,
      chunks: ['setup'],
      filename: 'setup.html',
      template: './src/setup.html'
    }),
    // copy extension manifest and icons
    new CopyWebpackPlugin([
      { from: './src/manifest.json' },
      { context: './src/assets', from: 'icon-**', to: 'assets' }
    ])
  ],
};
}