加vconsole

public/index.html

@@ -44,4 +44,10 @@
     <div id="app"></div>
     <!-- built files will be auto injected -->
   </body>
+  <script src="https://cdn.bootcdn.net/ajax/libs/vConsole/3.3.4/vconsole.min.js"></script>
+  <script>
+      // init vConsole
+      var vConsole = new VConsole();
+      console.log('Hello world');
+  </script>
 </html>