增加 jquery 的引入

src/main.js

@@ -30,7 +30,10 @@ window.dd = dd;
 
 import routes from './routes/main_routes.js';
 
-import 'jquery';
+
+console.log(window.$);
+import $ from 'jquery';
+console.log(window.$);
 
 
 import store from './store/index.js';