diff --git a/zh-cn/application-dev/reference/apis/js-apis-pasteboard.md b/zh-cn/application-dev/reference/apis/js-apis-pasteboard.md
index 2592b3c417c2ed32df4d4fb5f08dcbc5c09607f8..f9ef6da812156579a294a99a0878fbd69500f75a 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-pasteboard.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-pasteboard.md
@@ -938,7 +938,7 @@ off(type:  'update', callback?: () =>void ): void
 **示例**
 
   ```js
-  var listener = ()=>{
+  let listener = () = > {
       console.info('The system pasteboard has changed');
   };
   systemPasteboard.off('update', listener);