zzz

src/router/modules/router.index.js

+
 export default [
   {
     path: '/panel',
     name: 'panel',
     component (resolve) {
       require(['@/views/panel/index.vue'], resolve)
-    }
+    },
+    children: [
+      {
+        path: 'trace',
+        name: 'Trace',
+        component (resolve) {
+          require(['@/views/trace/index.vue'], resolve)
+        }
+      }
+    ]
   }
 ]