diff --git a/src/core/view/components/navigator/index.vue b/src/core/view/components/navigator/index.vue
index 90f4007f54b9d3e835f2ce58a15ca3359bbfcb44..024e4ab6282bcac345d140b484c3df8267ecaac8 100644
--- a/src/core/view/components/navigator/index.vue
+++ b/src/core/view/components/navigator/index.vue
@@ -92,7 +92,8 @@ export default {
       type: String,
       validator (value) {
         return !value || ~ANIMATION_TYPE_IN.concat(ANIMATION_TYPE_OUT).indexOf(value)
-      }
+      },
+      default: ''
     },
     animationDuration: {
       type: [String, Number],