删除冗余代码，打包优化

package.json

@@ -93,7 +93,7 @@
     "mockjs": "1.0.1-beta3",
     "node-sass": "^4.14.1",
     "runjs": "^4.3.2",
-    "sass-loader": "^7.3.1",
+    "sass-loader": "^8.0.0",
     "script-ext-html-webpack-plugin": "2.1.3",
     "script-loader": "^0.7.2",
     "serve-static": "^1.13.2",

vue.config.js

@@ -1,27 +1,16 @@
 'use strict'
 const path = require('path')
 const defaultSettings = require('./src/settings.js')
-// const CompressionWebpackPlugin = require('compression-webpack-plugin')
 
 function resolve(dir) {
   return path.join(__dirname, dir)
 }
 
 const name = defaultSettings.title || 'vue Admin Template' // page title
-// If your port is set to 80,
-// use administrator privileges to execute the command line.
-// For example, Mac: sudo npm run
+
 const port = 9528 // dev port
 
-// All configuration item explanations can be find in https://cli.vuejs.org/config/
 module.exports = {
-  /**
-   * You will need to set publicPath if you plan to deploy your site under a sub path,
-   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
-   * then publicPath should be set to "/bar/".
-   * In most cases please use '/' !!!
-   * Detail: https://cli.vuejs.org/config/#publicpath
-   */
   publicPath: '/',
   outputDir: 'dist',
   assetsDir: 'static',
@@ -36,8 +25,6 @@ module.exports = {
     },
     disableHostCheck: true, // webpack4.0 开启热更新
     proxy: {
-      // change xxx-api/login => mock/login
-      // detail: https://cli.vuejs.org/config/#devserver-proxy
       [process.env.VUE_APP_BASE_API]: {
         target: `http://127.0.0.1:${port}/mock`,
         changeOrigin: true,
@@ -46,28 +33,24 @@ module.exports = {
         }
       }
     }
-    // after: require('./mock/mock-server.js')
+  },
+  performance: { // 性能设置
+    hints: 'warning',
+    maxEntrypointSize: 500000,
+    maxAssetSize: 300000
   },
   configureWebpack: {
-    // provide the app's title in webpack's name field, so that
-    // it can be accessed in index.html to inject the correct title.
     name: name,
     resolve: {
       alias: {
         '@': resolve('src')
       }
     }
-    // plugins: [
-    //   new CompressionWebpackPlugin({ // 构建压缩加速
-    //     test: /\.js$|\.html$|\.css/
-    //   })
-    // ]
   },
   chainWebpack(config) {
     config.plugins.delete('preload') // TODO: need test
     config.plugins.delete('prefetch') // TODO: need test
 
-    // set svg-sprite-loader
     config.module
       .rule('svg')
       .exclude.add(resolve('src/icons'))
@@ -84,7 +67,6 @@ module.exports = {
       })
       .end()
 
-    // set preserveWhitespace
     config.module
       .rule('vue')
       .use('vue-loader')
@@ -96,7 +78,6 @@ module.exports = {
       .end()
 
     config
-    // https://webpack.js.org/configuration/devtool/#development
       .when(process.env.NODE_ENV === 'development',
         config => config.devtool('cheap-source-map')
       )
@@ -108,7 +89,6 @@ module.exports = {
             .plugin('ScriptExtHtmlWebpackPlugin')
             .after('html')
             .use('script-ext-html-webpack-plugin', [{
-            // `runtime` must same as runtimeChunk name. default is `runtime`
               inline: /runtime\..*\.js$/
             }])
             .end()
@@ -116,42 +96,12 @@ module.exports = {
             .optimization.splitChunks({
               chunks: 'all',
               cacheGroups: {
-                styles: {
-                  name: 'styles',
-                  test: /\.css$/,
-                  chunks: 'all',
-                  enforce: true // 忽略splitChunks的其他配置，强制将匹配到的缓存组中的文件合并为一个styles.css文件
-                },
                 libs: {
                   name: 'chunk-libs',
                   test: /[\\/]node_modules[\\/]/,
                   priority: -10,
                   chunks: 'initial' // only package third parties that are initially dependent
                 }
-                // elementUI: {
-                //   name: 'chunk-elementUI', // split elementUI into a single package
-                //   priority: 15, // the weight needs to be larger than libs and app or it will be packaged into libs or app
-                //   test: /[\\/]node_modules[\\/]element-ui[\\/]/, // in order to adapt to cnpm
-                //   chunks: 'all',
-                //   reuseExistingChunk: true,
-                //   enforce: true
-                // },
-                // echarts: {
-                //   name: 'chunk-echarts',
-                //   test: /[\\/]node_modules[\\/]echarts[\\/]/,
-                //   chunks: 'all',
-                //   priority: 10,
-                //   reuseExistingChunk: true,
-                //   enforce: true
-                // },
-                // demo: {
-                //   name: 'chunk-demo',
-                //   test: /[\\/]src[\\/]views[\\/]/,
-                //   chunks: 'all',
-                //   priority: 20,
-                //   reuseExistingChunk: true,
-                //   enforce: true
-                // }
               }
             })
           config.optimization.runtimeChunk('single')