webpack.prod.js

const HtmlWebPackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const MinifyPlugin = require('babel-minify-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');

const CopyPlugin = require('copy-webpack-plugin');

module.exports = {
  mode: 'production',
  optimization: {
    minimizer: [new OptimizeCssAssetsPlugin()],
  },
  output: {
    filename: 'main.[contentHash].js',
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.css$/,
        exclude: /styles\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /styles\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        test: /\.html$/i,
        loader: 'html-loader',
        options: {
          attributes: false,
          minimize: false,
        },
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              esModule: false,
            },
          },
        ],
      },
    ],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './src/index.html',
      filename: './index.html',
    }),
    new MiniCssExtractPlugin({
      filename: '[name].[contentHash].css',
      ignoreOrder: false,
    }),
    new CopyPlugin({
      patterns: [{ from: 'src/assets', to: 'assets/' }],
    }),
    new MinifyPlugin(),
    new CleanWebpackPlugin(),
  ],
};