diff --git a/zh-cn/application-dev/reference/apis/js-apis-url.md b/zh-cn/application-dev/reference/apis/js-apis-url.md
index eab93b045720c98fe9c3da9cde16a1f921f745a5..f7a30ab9b74c73fc034b9d8f37d69ff1337a21f2 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-url.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-url.md
@@ -108,10 +108,10 @@ getAll(name: string): string[]
 **示例：**
 
 ```js
-let urlObject = new Url.URL('https://developer.exampleUrl/?fod=1&bard=2'); 
-let paramsObject = new Url.URLSearchParams(urlObject.search.slice(1)); 
-paramsObject.append('fod', '3'); // Add a second value for the fod parameter.
-console.log(params.getAll('fod')) // Output ["1","3"].
+let urlObject = new Url.URL('https://developer.exampleUrl/?fod=1&bard=2');
+let params = new Url.URLSearchParams(urlObject.search.slice(1));
+params.append('fod', '3'); // Add a second value for the fod parameter.
+console.log(params.getAll('fod').toString()) // Output ["1","3"].
 ```
 
 
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 e5c8b0cd6d73d722deeb2b09230a02ad2c2bbef2..6c377e24bdb11ebd6c3ff67625e5dfffdebef286 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-util.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-util.md
@@ -151,16 +151,16 @@ promiseWrapper(original: (err: Object, value: Object) => void): Function
 
 **示例：**
   ```js
-  function aysnFun(str1, str2, callback) {
-      if (typeof str1 === 'string' && typeof str2 === 'string') {
-          callback(null, str1 + str2);
-      } else {
-          callback('type err');
-      }
+  function aysnFun(str1, str2) {
+    if (typeof str1 === 'object' && typeof str2 === 'object') {
+      return str2
+    } else {
+      return str1
+    }
   }
   let newPromiseObj = util.promiseWrapper(aysnFun);
-  newPromiseObj("Hello", 'World').then(res => {
-      console.log(res);
+  newPromiseObj({ err: "type error" }, {value:'HelloWorld'}).then(res => {
+    console.log(res);
   })
   ```