webpack.prod.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const TerserJSPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const LodashModuleReplacementPlugin = require('lodash-webpack-plugin');

module.exports = {
  mode: 'production',
  entry: './src/index.jsx',
  output: {
    path: path.resolve(__dirname, 'dist/'),
    publicPath: './',
    filename: 'bundle.js',
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader',
        options: {
          plugins: ['lodash'],
          presets: [
            [
              '@babel/preset-env',
              { modules: false, targets: { node: 4 } },
              'react',
            ],
          ],
        },
      },
      {
        test: /\.(s[ac]ss|css)$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(png|jpe?g|gif|ico)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: 'assets',
        },
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf|svg)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: 'assets',
        },
      },
    ],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({ template: './public/index.html' }),
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
    new BundleAnalyzerPlugin(),
    new LodashModuleReplacementPlugin({ collections: true, paths: true }),
  ],
  resolve: {
    extensions: ['*', '.js', '.jsx'],
    alias: {
      'react-dom': '@hot-loader/react-dom',
    },
  },
  optimization: {
    minimizer: [new TerserJSPlugin({}), new OptimizeCSSAssetsPlugin({})],
    noEmitOnErrors: true,
    splitChunks: {
      chunks: 'all',
    },
  },
};