webpack.config.js

const path = require("path");
const { merge } = require("webpack-merge");

const HtmlWebpackPlugin = require("html-webpack-plugin");
const CopyPlugin = require("copy-webpack-plugin");

const commonConfig = {
  entry: "./src/index.tsx",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "bundle.js",
  },
  resolve: {
    extensions: [".tsx", ".ts", ".js"],
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: "ts-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.js$/,
        use: ["source-map-loader"],
        enforce: "pre",
      },
      {
        test: /\.css$/i,
        use: [
          "style-loader", // Creates `style` nodes from JS strings
          "css-loader", // Translates CSS into CommonJS
        ],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ["file-loader"],
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader", // Creates `style` nodes from JS strings
          "css-loader", // Translates CSS into CommonJS
          "sass-loader", // Compiles Sass to CSS
        ],
      },
      // mp3 loader
      {
        test: /\.mp3$/,
        use: [
          {
            loader: "file-loader",
            options: {
              name: "[name].[ext]",
              outputPath: "sounds/",
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "./src/index.html",
      favicon: "./public/favicon.png",
    }),
    new CopyPlugin({
      patterns: [
        { from: "public", to: "" }, //to the dist root directory
      ],
    }),
  ],
};

const productionConfig = {
  devtool: "source-map",
  mode: "production",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "[name].bundle.[chunkhash].js",
    chunkFilename: "[name].bundle.[chunkhash].js",
  },
  optimization: {
    minimize: true,
    splitChunks: {
      chunks: "all",
    },
    splitChunks: {
      chunks: "all",
      cacheGroups: {
        vendor: {
          name: "vendor",
          chunks: "all",
          test: /\/node_modules/,
        },
      },
    },
  },

  performance: {
    hints: false,
  },
};

const developmentConfig = {
  devServer: {
    compress: true,
    port: 3011,
  },
};

module.exports = (env, args) => {
  switch (args.mode) {
    case "development":
      return merge(commonConfig, developmentConfig);
    case "production":
      return merge(commonConfig, productionConfig);
    default:
      throw new Error("No matching configuration was found!");
  }
};