webpack.prod.js

import { merge } from 'webpack-merge';
import common from './webpack.common.js';
import MiniCssExtractPlugin from 'mini-css-extract-plugin';
import CssMinimizerPlugin from 'css-minimizer-webpack-plugin';
import TerserPlugin from 'terser-webpack-plugin';

const config = merge(common, {
  mode: 'production',
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader",
        ],
      },
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].css",
      ignoreOrder: false,
    })
  ],
  optimization: {
    moduleIds: 'deterministic',
    splitChunks: {
      chunks: 'all',
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
    runtimeChunk: 'single',
    minimizer: [
      new CssMinimizerPlugin(),
      new TerserPlugin(),
    ],
  }
});

export default config;