webpack.prod.js

const path = require('path');
const { merge } = require('webpack-merge');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const common = require('./webpack.common.js');

module.exports = merge(common, {
  mode: 'production',
  output: {
    filename: 'main[hash].js',
    path: path.resolve(__dirname, 'dist'),
    clean: true,
  },
  optimization: {
    minimizer: [
      new HtmlWebpackPlugin({
        template: './src/index.html',
        minify: {
          removeAttributeQuotes: true,
          collapseWhitespace: true,
          removeComments: true,
        },
      }),
      new CssMinimizerPlugin(),
    ],
  },
  plugins: [new MiniCssExtractPlugin({ filename: '[name][hash].css' })],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
    ],
  },
});