diff --git a/examples/routers/back-top.vue b/examples/routers/back-top.vue
index b2fe126..260fbd9 100644
--- a/examples/routers/back-top.vue
+++ b/examples/routers/back-top.vue
@@ -10,6 +10,13 @@
 </template>
 <script>
     export default {
+        data(){
+            return {
 
+            }
+        },
+        mounted(){
+            
+        }
     }
 </script>
--
libgit2 0.21.4