webpack.prod.js

const path = require("path");
const { merge } = require("webpack-merge");
const common = require("./webpack.common.js");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = merge(common, {
  mode: "production",
  devtool: "source-map",
  output: {
    filename: "[name].[contenthash].js",
    path: path.resolve(__dirname, "dist"),
    assetModuleFilename: "[name][ext]",
    clean: true,
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
  optimization: {
    minimizer: [
      `...`,
      new CssMinimizerPlugin(),
      new HtmlWebpackPlugin({
        template: "./src/index.html",
        minify: {
          removeAttributeQuotes: true,
          collapseWhitespace: true,
          removeComments: true,
        },
      }),
    ],
  },
});