webpack.config.js

const path = require('path')
const webpack = require('webpack')
const wextManifest = require('wext-manifest')
// const ZipPlugin = require('zip-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const WriteWebpackPlugin = require('write-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const FixStyleOnlyEntriesPlugin = require('webpack-fix-style-only-entries')

const manifestInput = require('./src/manifest')

const targetBrowser = process.env.TARGET_BROWSER
const manifest = wextManifest[targetBrowser](manifestInput)

// const getExtensionFileType = () => {
//     if (targetBrowser === 'opera') {
//         return 'crx';
//     }
//     if (targetBrowser === 'firefox') {
//         return 'xpi';
//     }
//     return 'zip';
// };

module.exports = {
  mode: 'development',
  devtool: 'cheap-module-source-map',

  entry: {
    background: './src/scripts/background.js',
    // contentScript: './src/scripts/contentScript.js',
    popup: './src/popup.js',
    options: './src/options.js',
    fallback: './src/scripts/fallback.js',
    styles: './src/styles/styles.scss',
  },

  output: {
    filename: 'js/[name].bundle.js',
    path: path.resolve(__dirname, 'extension', targetBrowser),
  },

  plugins: [
    new webpack.ProgressPlugin(),
    new FixStyleOnlyEntriesPlugin({ silent: true }),
    new CleanWebpackPlugin({
      cleanOnceBeforeBuildPatterns: [
        path.join(process.cwd(), `extension/${targetBrowser}`),
        // path.join(process.cwd(), `extension/${targetBrowser}.${getExtensionFileType()}`),
      ],
      cleanStaleWebpackAssets: false,
      verbose: true,
    }),
    new HtmlWebpackPlugin({
      template: 'src/options.html',
      // inject: false,
      chunks: ['options'],
      filename: 'options.html',
    }),
    new HtmlWebpackPlugin({
      template: 'src/popup.html',
      // inject: false,
      chunks: ['popup'],
      filename: 'popup.html',
    }),
    new CopyWebpackPlugin({
      patterns: [
        { from: '_locales', to: '_locales' },
        { from: 'src/assets', to: 'assets' },
      ],
    }),
    new WriteWebpackPlugin([
      { name: manifest.name, data: Buffer.from(manifest.content) },
    ]),
  ],

  module: {
    rules: [
      {
        test: /.(js|jsx)$/,
        include: [path.resolve(__dirname, 'src/scripts')],
        loader: 'babel-loader',

        options: {
          plugins: ['syntax-dynamic-import'],

          presets: [
            [
              '@babel/preset-env',
              {
                modules: false,
              },
            ],
          ],
        },
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].css',
              context: './src/styles/',
              outputPath: 'css/',
            },
          },
          'extract-loader',
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            },
          },
          'postcss-loader',
          'resolve-url-loader',
          'sass-loader',
        ],
      },
    ],
  },

  optimization: {
    minimizer: [
      new TerserPlugin({
        // cache: true,
        parallel: true,
      }),
      // new ZipPlugin({
      //     path: path.resolve(__dirname, 'extension'),
      //     extension: `${getExtensionFileType()}`,
      //     filename: `${targetBrowser}`,
      // }),
    ],
  },

  devServer: {
    contentBase: path.join(__dirname, 'extension'),
  },
}