diff --git a/zh-cn/application-dev/reference/apis/js-apis-util.md b/zh-cn/application-dev/reference/apis/js-apis-util.md
index 84a9489b8551ad097f5178abe0d3b5549b4d6e87..c0a79872d031576a7ebefe61a5b172b10d02f1c4 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-util.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-util.md
@@ -1089,6 +1089,8 @@ type ScopeType = ScopeComparable | number;
 ```js
 class Temperature{
     constructor(value){
+       // 当使用ts语言开发时，需要补充以下代码：
+       // private readonly _temp: Temperature;
        this._temp = value;
     }
     comapreTo(value){