webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

module.exports = (env) => {
  const isProduction = env && env.production;

  return {
    mode: 'development',
    devtool: isProduction ? false : 'source-map',
    entry: {
      background: './src/background.ts',
      content: './src/content.ts',
      popup: './src/popup/index.tsx',
      options: './src/options/index.tsx',
    },
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: '[name].js',
    },
    resolve: {
      extensions: ['.ts', '.tsx', '.js'],
    },
    module: {
      rules: [
        {
          test: /\.tsx?$/,
          use: 'ts-loader',
          exclude: /node_modules/,
        },
        {
          test: /\.js$/,
          exclude: /node_modules/,
          use: {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env'],
            },
          },
        },
        {
          test: /\.scss$/,
          use: [
            'style-loader',
            {
              loader: 'css-loader',
              // options: {
              //   modules: true,
              // },
            },
            'sass-loader',
          ],
        },
        {
          test: /\.css$/,
          use: ['style-loader', 'css-loader'],
        },
      ],
    },
    plugins: [
      new CleanWebpackPlugin(),
      new CopyWebpackPlugin({
        patterns: [
          { from: 'manifest-chrome.json', to: 'manifest.json' },
          // { from: "manifest-firefox.json", to: "manifest.json" },
          { from: 'src/images', to: 'images' },
        ],
      }),
      new HtmlWebpackPlugin({
        filename: 'popup.html',
        template: './src/index.html',
        chunks: ['popup'],
      }),
      new HtmlWebpackPlugin({
        filename: 'options.html',
        template: './src/index.html',
        chunks: ['options'],
      }),
    ],
  };
};