优化结构

 import webpack, {DefinePlugin} from 'webpack';
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 import path from 'path';
 import MiniCssExtractPlugin from "mini-css-extract-plugin";
 import CleanWebpackPlugin from 'clean-webpack-plugin';
 import HtmlWebpackPlugin from "html-webpack-plugin";
 import config from "./config";
+const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
 
 let pathsToClean = [
     'dist'
@@ -24,6 +26,8 @@ let baseArr = [
         chunkFilename: "css/[id].css"
     }),//css分离
     new CleanWebpackPlugin(pathsToClean, cleanOptions),//清除历史版本
+    new UglifyJsPlugin({test: /\.js($|\?)/i,parallel: false})
+
 ];
 let htmls = function () {
     const title = require('./app/' + config.currentApp + '/title');
@@ -46,6 +50,16 @@ let htmls = function () {
 };
 
 module.exports = {
+    optimization: {
+        minimizer: [
+            new UglifyJsPlugin({
+                cache: true,
+                parallel: true,
+                sourceMap: true // set to true if you want JS source maps
+            }),
+            new OptimizeCSSAssetsPlugin({})
+        ]
+    },
     //项目入口js文件
     entry: [`./app/${config.currentApp}/index.js`],
     //项目输出目录