webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
// const LinkTypePlugin = require('html-webpack-link-type-plugin').HtmlWebpackLinkTypePlugin;
const HTMLInlineCSSWebpackPlugin = require("html-inline-css-webpack-plugin").default;
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  //path to entry paint
  entry: './src/js/main.js',

  externals: {
    '@jaames/iro': 'iro'
  },

  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'main.js'
  },
  mode: 'production',
  // mode: 'development',
  // mode: 'production',
  // devtool: "inline-source-map",

  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html',
    }),
    new MiniCssExtractPlugin(),
    new HTMLInlineCSSWebpackPlugin(),
  ],

  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader"
        ]
      },
      {
        test: /\.(?:js)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              ['@babel/preset-env', { targets: "Firefox ESR, > 0.5%, last 2 versions, not dead" }]
            ],
            plugins: [
              ["@babel/plugin-proposal-decorators", {legacy: true}],
              ["@babel/plugin-transform-class-properties", {"version": "2023-05"}]
            ]
          }
        }
      }
    ]
  },

  optimization: {
    minimizer: [
      new TerserPlugin({
        parallel: true,
      }),
      new CssMinimizerPlugin(),
    ],
  },
}