webpack.config.js

const HtmlWebpackPlugin = require("html-webpack-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const HTMLInlineCSSWebpackPlugin =
  require("html-inline-css-webpack-plugin").default;
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const HtmlInlineScriptPlugin = require("html-inline-script-webpack-plugin");
const InlineChunkHtmlPlugin = require("inline-chunk-html-plugin");
const TerserPlugin = require("terser-webpack-plugin");

const path = require("path");

module.exports = (env, argv) => {
  const isProduct = argv.mode === "production";

  const productionPlugins = [
    new HTMLInlineCSSWebpackPlugin(),
    new HtmlInlineScriptPlugin(),
    new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/.+/]),
  ];

  return {
    entry: "./src/index.js",
    output: {
      filename: "[name].[contenthash].js",
      path: path.resolve(__dirname, "./build"),
      publicPath: "",
    },

    devServer: {
      static: {
        directory: path.join(__dirname, "./build"),
      },
      compress: true,
      port: 9000,
      open: true,
    },
    module: {
      rules: [
        {
          test: /\.css$/i,
          use: [MiniCssExtractPlugin.loader, "css-loader"],
        },
        {
          test: /\.(mp3|wav)$/i,
          loader: "file-loader",
          options: {
            name: "[name].[contenthash].[ext]",
          },
        },
      ],
    },
    optimization: {
      runtimeChunk: "single",
      minimizer: true,
      minimizer: [new CssMinimizerPlugin(), new TerserPlugin()],
      splitChunks: {
        chunks: "all",
      },
    },
    plugins: [
      new CleanWebpackPlugin(),
      new HtmlWebpackPlugin({
        template: path.resolve(__dirname, "./index.html"),
        favicon: path.resolve(__dirname, "./src/assets/images/Duck.png"),
        inject: true,
      }),
      new CopyWebpackPlugin({
        patterns: [
          {
            from: path.resolve(__dirname, "./public"),
            to: "assets",
          },
        ],
      }),
      new MiniCssExtractPlugin(),
      ...(isProduct ? productionPlugins : []),
    ],
  };
};