webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  entry: './src/index.tsx',
  output: {
    filename: 'index.js',
    path: path.resolve(__dirname, 'dist'),
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.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', '@babel/preset-react'],
          },
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
    ],
  },
  plugins: [
    new CopyWebpackPlugin({
      patterns: [
        { from: 'manifest.json', to: '.' },
        { from: 'public/icons', to: 'icons' },
      ],
    }),
    new HtmlWebpackPlugin({
      template: 'src/popup.html',
      filename: 'popup.html',
      chunks: [],
    }),
  ],
  watch: true,
  mode: 'production',
  devtool: 'source-map',
};