webpack.config.js

const webpack = require('webpack');
const path = require('path');
const env = require('./utils/env');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

const ASSET_PATH = process.env.ASSET_PATH || '/';

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

const options = {
  mode: process.env.NODE_ENV || 'development',
  entry: {
    popup: path.join(__dirname, 'src', 'pages', 'Popup', 'index.tsx'),
    background: path.join(__dirname, 'src', 'pages', 'Background', 'index.ts'),
    contentScript: path.join(__dirname, 'src', 'pages', 'Content', 'index.ts'),
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'build'),
    clean: true,
    publicPath: ASSET_PATH,
    chunkFormat: false,
  },
  module: {
    rules: [
      {
        oneOf: [
          {
            resourceQuery: /raw/,
            type: 'asset/source',
          },
          {
            // look for .css or .scss files
            test: /\.(css|scss)$/,
            // in the `src` directory
            use: [
              {
                loader: 'style-loader',
              },
              {
                loader: 'css-loader',
              },
              {
                loader: 'sass-loader',
                options: {
                  sourceMap: true,
                },
              },
            ],
          },
          {
            test: new RegExp('.(' + fileExtensions.join('|') + ')$'),
            type: 'asset/resource',
            exclude: /node_modules/,
          },
          {
            test: /\.html$/,
            loader: 'html-loader',
            exclude: /node_modules/,
          },
          { test: /\.(ts|tsx)$/, loader: 'ts-loader', exclude: /node_modules/ },
        ],
      },
    ],
  },
  resolve: {
    extensions: fileExtensions
      .map((extension) => '.' + extension)
      .concat(['.js', '.jsx', '.ts', '.tsx', '.css']),
  },
  plugins: [
    new CleanWebpackPlugin({ verbose: false }),
    new webpack.ProgressPlugin(),
    // expose and write the allowed env vars on the compiled bundle
    new webpack.EnvironmentPlugin(['NODE_ENV']),
    new CopyWebpackPlugin({
      patterns: [
        {
          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()),
              })
            );
          },
        },
      ],
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/assets/img/icon-128.png',
          to: path.join(__dirname, 'build'),
          force: true,
        },
      ],
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/assets/img/icon-34.png',
          to: path.join(__dirname, 'build'),
          force: true,
        },
      ],
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Popup', 'index.html'),
      filename: 'popup.html',
      chunks: ['popup'],
      cache: false,
    }),
  ],
  infrastructureLogging: {
    level: 'info',
  },
};

if (env.NODE_ENV === 'development') {
  options.devtool = 'cheap-module-source-map';
} else {
  options.optimization = {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        extractComments: false,
      }),
    ],
  };
}

module.exports = options;