mode

public/index.html

@@ -6,7 +6,8 @@
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width,initial-scale=1.0">
   <link rel="icon" href="<%= BASE_URL %>logo.ico">
- 
+  <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
+  <script src="https://unpkg.com/element-ui/lib/index.js"></script>
   <title>
     <%= htmlWebpackPlugin.options.title %>
   </title>

vue.config.js

@@ -12,6 +12,14 @@ module.exports = {
     }
   },
   configureWebpack: {
+    externals: {
+      'vue': 'Vue',
+      'element-ui': 'ELEMENT',
+      'vue-router': 'VueRouter',
+      'vuex': 'Vuex',
+      'axios': 'axios',
+      'echarts': 'echarts'
+    },
     resolve: {
       alias: {
         components: "@/components",