diff --git a/src/components/navBar/index.vue b/src/components/navBar/index.vue
index e176013..c8573a6 100644
--- a/src/components/navBar/index.vue
+++ b/src/components/navBar/index.vue
@@ -40,7 +40,9 @@ const root = document.documentElement;
 root.style.setProperty(
   "--statusBarHeight",
   `${
-    currentWebView.RunTime === "app" ? plus.navigator.getStatusbarHeight() : 0
+    currentWebView.RunTime === "app"
+      ? plus.navigator.getStatusbarHeight()
+      : 0 ?? 0
   }px`
 );
 </script>