webpack.client.prod.js

const webpack = require('webpack');
const path = require('path');
const ReactLoadablePlugin = require('react-loadable/webpack').ReactLoadablePlugin;
const ManifestPlugin = require('webpack-manifest-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');

module.exports = {
  target: 'web',
  entry: {
    main: './src/client/index.js',
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: '[name].[chunkhash].js',
    publicPath: '/assets/',
  },
  mode: 'production',
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: 'babel-loader'
      },
      {
        test: /\.css$/,
        use: [
          { loader: 'style-loader' },
          { loader: 'css-loader' },
        ],
      },
    ],
  },
  plugins: [
    new CleanWebpackPlugin(['public/*']),
    new ReactLoadablePlugin({
      filename: './public/react-loadable.json',
    }),
    new ManifestPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': '"production"',
    }),
  ],
  optimization: {
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendor',
          chunks: 'all'
        }
      }
    }
  },
};