webpack.config.js

const path = require('path');

const CopyWebpackPlugin = require('copy-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const destination = path.resolve(__dirname, 'build');
const chromeExt = path.resolve(__dirname, 'FetchTreeChromeExt');

module.exports = {
  mode: 'development',
  entry: {
    app: `${chromeExt}/src/components/index.tsx`,
    injectScript: `${chromeExt}/injectScript.js`,
    contentScript: `${chromeExt}/contentScript.js`,
  },
  output: {
    path: path.resolve('./build/'),
    filename: '[name].js',
    publicPath: '.',
  },
  devtool: 'cheap-module-source-map',
  module: {
    rules: [
      {
        test: /\.(svg|png|jpg|gif|jpeg)$/,
        use: {
          loader: 'file-loader',
          options: {
            name: '[name].[hash].[ext]',
            outputPath: 'imgs',
          },
        },
      },
      {
        test: /\.jsx?$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: { presets: ['@babel/preset-env', '@babel/preset-react'] },
        },
      },
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
      { test: /\.(css)$/, use: ['style-loader', 'css-loader'] },
      {
        test: /\.s[ac]ss$/i,
        use: [
          // Creates `style` nodes from JS strings
          MiniCssExtractPlugin.loader,
          // Translates CSS into CommonJS
          'css-loader',
          // Compiles Sass to CSS
          'sass-loader',
        ],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx', '.scss', '.css', '.ts', '.tsx', '.jpg', '.png'],
  },
  plugins: [
    new MiniCssExtractPlugin(),
    new CleanWebpackPlugin(),
    new CopyWebpackPlugin({
      patterns: [
        { from: `${chromeExt}/manifest.json`, to: destination },
        { from: `${chromeExt}/src/devtools/devtools.html`, to: destination },
        { from: `${chromeExt}/src/devtools/devtools.js`, to: destination },
        { from: `${chromeExt}/src/index.html`, to: destination },
        { from: `${chromeExt}/background.js`, to: destination },
        { from: `${chromeExt}/src/style.css`, to: destination },
        { from: `${chromeExt}/src/assets/Logo.png`, to: destination },
      ],
    }),
  ],
};