webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const webpack = require('webpack')
const resolve = require('path').resolve
// const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer')
const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin')

const isDevelopment = process.env.NODE_ENV !== 'production'
module.exports = {
  mode: isDevelopment ? 'development' : 'production',
  entry: resolve(__dirname, 'app/index.js'),
  output: {
    path: resolve(__dirname, 'dist'),
    filename: '[name].[hash].js',
    publicPath: '/',
  },
  devServer: {
    contentBase: resolve(__dirname, 'dist'),
    hot: true,
    historyApiFallback: {
      index: 'index.html',
    },
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: 'babel-loader',
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192,
            },
          },
        ],
      },
      {
        test: /\.(s?css)$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              ident: 'postcss',
              plugins: [require('tailwindcss'), require('autoprefixer')],
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new webpack.HashedModuleIdsPlugin(),
    new HtmlWebpackPlugin({
      template: './app/index.html',
    }),
    new MiniCssExtractPlugin({ filename: '[contenthash].css' }),
    // new BundleAnalyzerPlugin()
    isDevelopment && new ReactRefreshWebpackPlugin(),
  ].filter(Boolean),
  optimization: {
    runtimeChunk: 'single',
    splitChunks: {
      chunks: 'all',
      maxInitialRequests: Infinity,
      minSize: 0,
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name(module) {
            // get the name. E.g. node_modules/packageName/not/this/part.js
            // or node_modules/packageName
            const packageName = module.context.match(
              /[\\/]node_modules[\\/](.*?)([\\/]|$)/
            )[1]

            // npm package names are URL-safe, but some servers don't like @ symbols
            return `npm.${packageName.replace('@', '')}`
          },
        },
      },
    },
  },
}