webpack.prod.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserPlugin = require("terser-webpack-plugin");
const buildPath = path.resolve(__dirname, 'dist');
const FaviconsWebpackPlugin = require('favicons-webpack-plugin')

module.exports = {

  // This option controls if and how source maps are generated.
  // https://webpack.js.org/configuration/devtool/
  devtool: 'source-map',

  // https://webpack.js.org/concepts/entry-points/#multi-page-application
  entry: {
    index: './src/index.js'
    //about: './src/about.js',
  },

  // how to write the compiled files to disk
  // https://webpack.js.org/concepts/output/
  output: {
    filename: '[name].[hash:20].js',
    path: buildPath
  },

  // https://webpack.js.org/concepts/loaders/
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env']
        }
      },
      {
        test: /\.css$|.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader",
          'postcss-loader',
          {
            loader: 'sass-loader',
            options: {
              sassOptions: {
                includePaths: ['./node_modules']
              }
            }
          }
        ]
      },
      {
        loader: "webpack-modernizr-loader",
        test: /\.modernizrrc\.js$/
        // Uncomment this when you use `JSON` format for configuration
        // type: 'javascript/auto'
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: 'images/',
          publicPath: 'images/'
        }
      },
      {
        test: /\.(webmanifest|ico)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: '.',
          publicPath: '.'
        }
      }
    ]
  },

  // https://webpack.js.org/concepts/plugins/
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      template: './src/index.html',
      inject: 'body',
      chunks: ['index'],
      filename: 'index.html'
    }),
   // new HtmlWebpackPlugin({
   //     template: './src/about.html',
   //     inject: 'body',
   //     chunks: ['about'],
   //     filename: 'about.html'
   // }),
    new FaviconsWebpackPlugin('./src/img/icon.png'),
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].css",
      chunkFilename: "[id].[contenthash].css"
    })
  ],

  // https://webpack.js.org/configuration/optimization/
  optimization: {
    minimizer: [
      new TerserPlugin(),
      new OptimizeCssAssetsPlugin({})
    ]
  }
};