webpack.config.prod.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

const outputDirectory = 'dist';

module.exports = {
  entry: ['babel-polyfill', './src/client/index.js'],
  output: {
    path: path.join(__dirname, outputDirectory),
    filename: 'static/js/[hash].bundle.js',
    globalObject: 'this',
  },
  optimization: {
    splitChunks: {
      chunks: 'all',
    },
  },
  performance: {
    hints: false,
    maxEntrypointSize: 512000,
    maxAssetSize: 512000
  },
  mode: 'production',
  devtool: false,
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.worker\.js$/,
        use: {
          loader: 'worker-loader',
          options: {
            name: 'static/js/[name].[hash].worker.js'
          }
        }
      },
      {
        test: /\.(s*)css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'sass-loader']
      },
      {
        test: /\.(png|woff|woff2|eot|ttf|svg)$/,
        use: {
          loader: 'url-loader',
          options: {
            limit: 8192,
            fallback: 'file-loader',
            name: () => 'static/media/[name].[hash].[ext]'
          }
        }
      }
    ]
  },
  resolve: {
    extensions: ['.json', '.js', '.jsx']
  },
  plugins: [
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      filename: 'static/css/[name].[contenthash].css',
      chunkFilename: 'static/css/[id].[contenthash].css',
      ignoreOrder: true,
    }),
    new HtmlWebpackPlugin({
      template: './public/index.html',
      favicon: './public/favicon.ico',
      minify: {
        collapseWhitespace: true,
        removeComments: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        minifyJS: true,
      },
    }),
    new CopyPlugin([{
      from: './public',
      ignore: ['index.html', 'favicon.ico']
    },
    ])
  ]
};