webpack.config.js

const { resolve } = require('path');
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');

module.exports = {
  entry: './src/index.js',
  output: {
    filename: '[name].[chunkhash].js',
    path: resolve(__dirname, 'dist'),
  },
  plugins: [
    new HtmlWebpackPlugin({
      title: 'GDPR Plugin',
      template: './src/index.html',
      inject: true,
      minify: {
        removeAttributeQuotes: true,
        removeComments: true,
        collapseWhitespace: true,
      },
    }),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        include: [resolve(__dirname, 'src')],
        loader: 'babel-loader',
        options: {
          plugins: ['syntax-dynamic-import'],
          presets: [
            [
              '@babel/preset-env',
              {
                modules: false,
              },
            ],
          ],
        },
      },
      {
        test: [/.css$|.scss$/],
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          'css-loader',
          'postcss-loader',
          'sass-loader',
        ],
      },
    ],
  },
  optimization: {
    minimizer: [new OptimizeCssAssetsPlugin(), new TerserPlugin()],
    splitChunks: {
      cacheGroups: {
        vendors: {
          priority: -10,
          test: /[\\/]node_modules[\\/]/,
        },
      },
      chunks: 'async',
      minChunks: 1,
      minSize: 30000,
      name: true,
    },
  },
  devServer: {
    open: true,
  },
};