webpack.config.production.js

const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const ImageMinimizerPlugin = require("image-minimizer-webpack-plugin");
const { extendDefaultPlugins } = require("svgo");

module.exports = {
  // Webpack configuration goes here
  mode: 'production',
  entry: {
    app: './src/index.js',
  },
  output: {
    filename: 'static/[name].[fullhash].js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/'
  },
  resolve: {
    extensions: [".js", ".jsx"]
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'sass-loader'
        ]
      },
      {
        test: /\.(jpe?g|png|gif|svg)$/i,
        type: "asset/resource",
      },
    ]
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin(),
      new ImageMinimizerPlugin({
        minimizer: {
          implementation: ImageMinimizerPlugin.imageminMinify,
          options: {
            // Lossless optimization with custom option
            // Feel free to experiment with options for better result for you
            plugins: [
              ["gifsicle", { interlaced: true }],
              ["jpegtran", { progressive: true }],
              ["optipng", { optimizationLevel: 5 }],
              // Svgo configuration here https://github.com/svg/svgo#configuration
              [
                "svgo",
                {
                  plugins: extendDefaultPlugins([
                    {
                      name: "removeViewBox",
                      active: false,
                    },
                    {
                      name: "addAttributesToSVGElement",
                      params: {
                        attributes: [{ xmlns: "http://www.w3.org/2000/svg" }],
                      },
                    },
                  ]),
                },
              ],
            ],
          },
        },
      }),
    ],
    runtimeChunk: 'single',
    splitChunks: {
      cacheGroups: {
        styles: {
          name: 'styles',
          test: /\.s?css$/,
          chunks: 'all',
          enforce: true
        },
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          maxSize: 2000000,
          chunks: 'all'
        }
      }
    }
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'public/index.html',
      favicon: 'public/favicon.ico'
    }),
    new MiniCssExtractPlugin({
      filename: 'styles/styles.[fullhash].css'
    }),
    new webpack.DefinePlugin({
      'process.env': {}
    }),
  ],
};