webpack.config.js

var webpack = require('webpack'),
  path = require('path'),
  fileSystem = require('fs'),
  env = require('./utils/env'),
  { CleanWebpackPlugin } = require('clean-webpack-plugin'),
  CopyWebpackPlugin = require('copy-webpack-plugin'),
  HtmlWebpackPlugin = require('html-webpack-plugin'),
  WriteFilePlugin = require('write-file-webpack-plugin')

// load the secrets
var alias = {
  'react-dom': '@hot-loader/react-dom',
}

var secretsPath = path.join(__dirname, 'secrets.' + env.NODE_ENV + '.js')

var fileExtensions = ['jpg', 'jpeg', 'png', 'gif', 'eot', 'otf', 'svg', 'ttf', 'woff', 'woff2']

if (fileSystem.existsSync(secretsPath)) {
  alias['secrets'] = secretsPath
}

var options = {
  mode: process.env.NODE_ENV || 'development',
  entry: {
    popup: path.join(__dirname, 'src', 'pages', 'Popup', 'index.jsx'),
    background: path.join(__dirname, 'src', 'pages', 'Background', 'index.js'),
    contentScript: path.join(__dirname, 'src', 'pages', 'Content', 'index.js'),
  },
  chromeExtensionBoilerplate: {
    notHotReload: ['contentScript'],
  },
  output: {
    path: path.join(__dirname, 'build'),
    filename: '[name].bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader',
        exclude: /node_modules/,
      },
      {
        test: new RegExp('.(' + fileExtensions.join('|') + ')$'),
        loader: 'file-loader?name=[name].[ext]',
        exclude: /node_modules/,
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.(js|jsx)$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    alias: alias,
    extensions: fileExtensions.map(extension => '.' + extension).concat(['.jsx', '.js', '.css']),
  },
  plugins: [
    new webpack.ProgressPlugin(),
    // clean the build folder
    new CleanWebpackPlugin({
      verbose: true,
      // cleanStaleWebpackAssets: false,
    }),
    // expose and write the allowed env vars on the compiled bundle
    new webpack.EnvironmentPlugin(['NODE_ENV']),
    new CopyWebpackPlugin(
      [
        {
          from: 'src/manifest.json',
          to: path.join(__dirname, 'build'),
          force: true,
          transform: function(content, path) {
            // generates the manifest file using the package.json informations
            return Buffer.from(
              JSON.stringify({
                description: process.env.npm_package_description,
                version: process.env.npm_package_version,
                ...JSON.parse(content.toString()),
              })
            )
          },
        },
      ],
      {
        logLevel: 'info',
        copyUnmodified: true,
      }
    ),
    new CopyWebpackPlugin(
      [
        {
          from: 'src/pages/Content/content.styles.css',
          to: path.join(__dirname, 'build'),
          force: true,
        },
      ],
      {
        logLevel: 'info',
        copyUnmodified: true,
      }
    ),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Popup', 'index.html'),
      filename: 'popup.html',
      chunks: ['popup'],
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Background', 'index.html'),
      filename: 'background.html',
      chunks: ['background'],
    }),
    new WriteFilePlugin(),
  ],
}

if (env.NODE_ENV === 'development') {
  options.devtool = 'cheap-module-eval-source-map'
}

module.exports = options