webpack.config.js

const path = require('path');
const CompressionPlugin = require('compression-webpack-plugin');
const BrotliPlugin = require('brotli-webpack-plugin');

module.exports = {
  mode: 'production',
  entry: './src/components/index.jsx',
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: 'bundle.js',
  },
  plugins: [
    new CompressionPlugin({
      filename: '[path].gz[query]',
      algorithm: 'gzip',
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.7,
    }),
    new BrotliPlugin({
      asset: '[path].br[query]',
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.7,
    }),
  ],
  module: {
    rules: [
      {
        test: /jsx?$/,
        exclude: /(node_modules)/,
        resolve: {
          extensions: ['.js', '.jsx'],
        },
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
    ],
  },
};