webpack.prod.js

const resolve = require('path').resolve;
const webpack = require('webpack');
const Dotenv = require('dotenv-webpack');

const { merge } = require('webpack-merge');
const common = require('./webpack.common.js');

const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const bundleAnalyzerMode = true ? 'static' : 'server';
console.log('bundleAnalyzerMode', bundleAnalyzerMode);

const SpeedMeasurePlugin = require('speed-measure-webpack-plugin');
const smp = new SpeedMeasurePlugin();

const config = smp.wrap(
  merge(common, {
    mode: 'production',
    plugins: [
      new BundleAnalyzerPlugin({
        analyzerMode: bundleAnalyzerMode,
      }),
    ],
    optimization: {
      splitChunks: {
        // chunks: 'async',
        // minSize: 20000,
        // minRemainingSize: 0,
        // minChunks: 1,
        // maxAsyncRequests: 30,
        // maxInitialRequests: 30,
        // enforceSizeThreshold: 50000,
        // cacheGroups: {
        //   defaultVendors: {
        //     test: /[\\/]node_modules[\\/]/,
        //     priority: -10,
        //     reuseExistingChunk: true,
        //   },
        //   default: {
        //     minChunks: 2,
        //     priority: -20,
        //     reuseExistingChunk: true,
        //   },
        // },
      },
    },
  })
);

// Enables bundling against src in this repo rather than the installed version
module.exports = (env) => {
  return env && env.local ? require('../webpack.config.local')(config)(env) : config;
};