webpack.prod.js

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

module.exports = merge(common, {
  mode: 'production',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].[contenthash].min.js',
    publicPath: '/',
  },
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(png|svg|jpe?g|gif|mp3|ttf)$/i,
        use: {
          loader: 'url-loader',
          options: {
            name: 'assets/[name].[ext]',
            limit: false,
          },
        },
      },
    ],
  },
  optimization: {
    runtimeChunk: 'multiple',
    usedExports: true,
    splitChunks: {
      cacheGroups: {
        vendor: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendors',
          chunks: 'all',
        },
      },
    },
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].min.css',
      chunkFilename: '[id].[contenthash].min.css',
    }),
  ],
});