diff --git a/src/pages/demo/playground/db/index.vue b/src/pages/demo/playground/db/index.vue
index 601a0503..632d7353 100644
--- a/src/pages/demo/playground/db/index.vue
+++ b/src/pages/demo/playground/db/index.vue
@@ -10,7 +10,7 @@ import db from '@/libs/db.js'
 export default {
   data () {
     return {
-      dbData: {}
+      dbData: ''
     }
   },
   mounted () {