text: const merge = require('webpack-merge');
  const common = require('./webpack.common.js');
  const TerserPlugin = require('terser-webpack-plugin')
  
  module.exports = merge(common, {
    mode: 'production',
    optimization: {
      splitChunks: {
        chunks: 'all',
      },
    },
    plugins: [
      new TerserPlugin({
        parallel: true,
        terserOptions: {
          ecma: 6,
        },
      }),
    ]
  });
  