webpack.config.js

const path = require("path");
const TerserPlugin = require("terser-webpack-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const devMode = process.env.NODE_ENV !== "production";

module.exports = {
  entry: "./src/index.js",
  mode: "production",
  devtool: "inline-source-map",
  output: {
    filename: "main.js",
    path: path.resolve(__dirname, "dist"),
  },
  optimization: {
    minimize: true,
    runtimeChunk: "single",
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          format: {
            comments: false,
          },
        },
        extractComments: false,
      }),
      new CssMinimizerPlugin(),
    ],
    splitChunks: {
      chunks: "all",
      maxInitialRequests: Infinity,
      minSize: 20000,
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name(module) {
            const packageName = module.context.match(
              /[\\/]node_modules[\\/](.*?)([\\/]|$)/
            )[1];
            return `npm.${packageName.replace("@", "")}`;
          },
        },
      },
    },
  },
  output: {
    filename: "[contenthash].js",
  },
  devServer: {
    contentBase: path.join(__dirname, "dist"),
    compress: true,
    port: 3000,
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-react"],
          },
        },
      },
      {
        test: /\.(less|css)$/i,
        use: [
          {
            loader: devMode ? "style-loader" : MiniCssExtractPlugin.loader,
          },
          {
            loader: "css-loader",
          },
          {
            loader: "less-loader",
          },
        ],
      },
      {
        test: /\.(png|jpe?g|gif)$/i,
        use: [
          {
            loader: "file-loader",
          },
        ],
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[contenthash].css",
    }),
    new HtmlWebpackPlugin({
      template: "index.ejs",
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: false,
        minifyCSS: true,
        minifyURLs: true,
      },
      inject: true,
      // Note that you can add custom options here if you need to handle other custom logic in index.html
      // To track JavaScript errors via TrackJS, sign up for a free trial at TrackJS.com and enter your token below.
      trackJSToken: "",
    }),
  ]
};