materio-d8/build/webpack.config.prod.js

'use strict'

const webpack = require('webpack')
const { merge } = require('webpack-merge')
const baseConfig = require('./webpack.config.base')
const MiniCssExtractPlugin  = require('mini-css-extract-plugin')
const TerserPlugin = require("terser-webpack-plugin");

module.exports = merge(baseConfig, {
  mode: 'production',
  module: {
    rules: [
      {
        test: /\.css?$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: '',
            },
          },
          'css-loader'
        ]
      }, {
        test: /\.scss?$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: '',
            },
          },
          'css-loader',
          'sass-loader'
        ]
      }, {
        test: /\.(png|jpg|gif|svg)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 5000
            }
          }
        ]
      }
    ]
  },
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        parallel: true,
        test: /\.(js|vue)$/,
        // extractComments: true
        terserOptions: {
          compress: {
            // drop_console: true,
            pure_funcs: [
                'console.log',
                'console.info',
                'console.debug'
                // 'console.warn'
            ]
          },
        },
      })
    ],
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    })
  ]
})