diff --git a/zh-cn/application-dev/reference/apis/js-apis-arraylist.md b/zh-cn/application-dev/reference/apis/js-apis-arraylist.md
index efda37f74d406b30d34ba67934e19915b80be119..7435c4bd4aad33fb8e261a1a7b3368e94091a011 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-arraylist.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-arraylist.md
@@ -537,7 +537,7 @@ arrayList.add(2);
 arrayList.add(4);
 arrayList.add(5);
 arrayList.add(4);
-arrayList.trimToCurrentLength(2);
+arrayList.trimToCurrentLength();
 ```
 
 ### [Symbol.iterator]
diff --git a/zh-cn/application-dev/reference/apis/js-apis-lightweightset.md b/zh-cn/application-dev/reference/apis/js-apis-lightweightset.md
index 2780befaf7d6a95e9ad30924d514354eee48af64..1ff86fc1903ddf9d9c92a779fcf3814df084ca62 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-lightweightset.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-lightweightset.md
@@ -193,7 +193,7 @@ let result = lightWeightSet.equal(obj);
 ```
 
 
-### ensureCapacityTo
+### increaseCapacityTo
 
 increaseCapacityTo(minimumCapacity: number): void
 
@@ -209,7 +209,7 @@ increaseCapacityTo(minimumCapacity: number): void
 
 ```
 let lightWeightSet = new LightWeightSet();
-lightWeightSet.ensureCapacityTo(10);
+lightWeightSet.increaseCapacityTo(10);
 ```
 
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-plainarray.md b/zh-cn/application-dev/reference/apis/js-apis-plainarray.md
index ab5dc6d0d61684d2c31f7299201c63aa3f37d912..0ff829fa745d6d71780cffdcd85b7e89026dba03 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-plainarray.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-plainarray.md
@@ -117,7 +117,7 @@ let result = plainArray.get(1);
 
 getIndexOfKey(key: number): number;
 
-查找指定元素第一次出现的下标值，如果没有找到该元素返回-1。
+查找指定key第一次出现的下标值，如果没有找到该元素返回-1。
 
 **参数：**
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-vector.md b/zh-cn/application-dev/reference/apis/js-apis-vector.md
index d19a085e4196163f08e93b6386bc432bd8b5216b..3e9285e735f00541bdee712b0f1488123d8a65a9 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-vector.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-vector.md
@@ -540,7 +540,7 @@ vector.add(2);
 vector.add(4);
 vector.add(5);
 vector.add(4);
-vector.trimToCurrentLength(2);
+vector.trimToCurrentLength();
 ```
 
 ### toString