webpack.config.js

const path = require("path");
const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const TerserPlugin = require("terser-webpack-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");

const webpackMode = process.env.NODE_ENV || "development";

module.exports = {
  mode: webpackMode,
  entry: {
    main: "./src/main.js",
  },
  output: {
    path: path.resolve("./dist"),
    filename: "[name].min.js",
  },
  devServer: {
    liveReload: true,
  },
  optimization: {
    minimizer:
      webpackMode === "production"
        ? [
            new TerserPlugin({
              terserOptions: {
                compress: {
                  drop_console: true,
                },
              },
            }),
          ]
        : [],
    splitChunks: {
      chunks: "all",
    },
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: "babel-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.js$/,
        enforce: "pre",
        use: ["source-map-loader"],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./src/index.html",
      minify:
        process.env.NODE_ENV === "production"
          ? {
              collapseWhitespace: true,
              removeComments: true,
            }
          : false,
    }),
    new CleanWebpackPlugin(),
    new CopyWebpackPlugin({
      patterns: [
        { from: "./src/main.css", to: "./main.css" },
        { from: "./src/images", to: "./images" },
        { from: "./src/models", to: "./models" },
        { from: "./src/textures", to: "./textures" },
        { from: "./src/sounds", to: "./sounds" },
      ],
    }),
  ],
};