diff --git a/zh-cn/application-dev/reference/apis/js-apis-linkedlist.md b/zh-cn/application-dev/reference/apis/js-apis-linkedlist.md
index dc0d848352076ab4df82048977535f6a808191ce..366052f94e8c9a8356bc50a6fdbf34d58d92869d 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-linkedlist.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-linkedlist.md
@@ -19,7 +19,7 @@ LinkedList和[ArrayList](js-apis-arraylist.md)相比，插入数据效率LinkedL
 ## 导入模块
 
 ```ts
-import LinkedList from '@ohos.util.LinkedList';  
+import LinkedList from '@ohos.util.LinkedList';
 ```
 
 ## LinkedList
@@ -53,7 +53,7 @@ LinkedList的构造函数。
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<string | number | boolean | object> = new LinkedList();
 ```
 
 
@@ -88,12 +88,16 @@ add(element: T): boolean
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<string | number | boolean | object> = new LinkedList();
 let result = linkedList.add("a");
 let result1 = linkedList.add(1);
 let b = [1, 2, 3];
 let result2 = linkedList.add(b);
-let c = {name : "Dylon", age : "13"};
+class C {
+  name: string = ''
+  age: string = ''
+}
+let c: C = {name : "Dylon", age : "13"};
 let result3 = linkedList.add(c);
 let result4 = linkedList.add(false);
 ```
@@ -123,12 +127,16 @@ addFirst(element: T): void
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<string | number | boolean | object> = new LinkedList();
 linkedList.addFirst("a");
 linkedList.addFirst(1);
 let b = [1, 2, 3];
 linkedList.addFirst(b);
-let c = {name : "Dylon", age : "13"};
+class C {
+  name: string = ''
+  age: string = ''
+}
+let c: C = {name : "Dylon", age : "13"};
 linkedList.addFirst(c);
 linkedList.addFirst(false);
 ```
@@ -160,7 +168,7 @@ insert(index: number, element: T): void
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<string | number | boolean | object> = new LinkedList();
 linkedList.insert(0, "A");
 linkedList.insert(1, 0);
 linkedList.insert(2, true);
@@ -197,7 +205,7 @@ has(element: T): boolean
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<string> = new LinkedList();
 linkedList.add("squirrel");
 let result = linkedList.has("squirrel");
 ```
@@ -233,7 +241,7 @@ get(index: number): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -275,7 +283,7 @@ getLastIndexOf(element: T): number
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -317,7 +325,7 @@ getIndexOf(element: T): number
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -360,7 +368,7 @@ removeByIndex(index: number): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -395,7 +403,7 @@ removeFirst(): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -430,7 +438,7 @@ removeLast(): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -470,7 +478,7 @@ remove(element: T): boolean
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -511,7 +519,7 @@ removeFirstFound(element: T): boolean
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -552,7 +560,7 @@ removeLastFound(element: T): boolean
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -585,7 +593,7 @@ clone(): LinkedList&lt;T&gt;
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -628,13 +636,13 @@ callbackfn的参数说明：
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
 linkedList.add(4);
-linkedList.forEach((value, index) => {
-    console.log("value:" + value, "index:" + index);
+linkedList.forEach((value:number, index: number) => {
+  console.log("value:" + value, "index:" + index);
 });
 ```
 
@@ -657,7 +665,7 @@ clear(): void
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -698,7 +706,7 @@ set(index: number, element: T): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number | string> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -730,7 +738,7 @@ convertToArray(): Array&lt;T&gt;
 
 **示例：**
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -763,7 +771,7 @@ getFirst(): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -796,7 +804,7 @@ getLast(): T
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
@@ -829,22 +837,23 @@ let result = linkedList.getLast();
 **示例：**
 
 ```ts
-let linkedList = new LinkedList();
+let linkedList: LinkedList<number> = new LinkedList();
 linkedList.add(2);
 linkedList.add(4);
 linkedList.add(5);
 linkedList.add(4);
 
 // 使用方法一：
-for (let item of linkedList) { 
+let items = Array.from(linkedList)
+for (let item of items) { 
   console.log("value:" + item); 
 } 
 
 // 使用方法二：
 let iter = linkedList[Symbol.iterator]();
-let temp = iter.next().value;
-while(temp != undefined) {
-  console.log("value:" + temp);
-  temp = iter.next().value;
+let temp = iter.next();
+while(!temp.done) {
+  console.log("value:" + temp.value);
+  temp = iter.next();
 }
 ```
\ No newline at end of file
diff --git a/zh-cn/application-dev/reference/apis/js-apis-list.md b/zh-cn/application-dev/reference/apis/js-apis-list.md
index 8da997e8fcfbcf075f87948f29f89001f62d46a0..f151ac9e52a76cf398aecc1252e471c35bc54b43 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-list.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-list.md
@@ -51,7 +51,7 @@ List的构造函数。
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<string | number | boolean | object> = new List();
 ```
 
 
@@ -86,12 +86,16 @@ add(element: T): boolean
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<string | number | boolean | object> = new List();
 let result1 = list.add("a");
 let result2 = list.add(1);
 let b = [1, 2, 3];
 let result3 = list.add(b);
-let c = {name : "Dylon", age : "13"};
+class C {
+  name: string = ''
+  age: string = ''
+}
+let c: C = {name : "Dylon", age : "13"};
 let result4 = list.add(c);
 let result5 = list.add(false);
 ```
@@ -123,7 +127,7 @@ insert(element: T, index: number): void
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<string | number | boolean> = new List();
 list.insert("A", 0);
 list.insert(0, 1);
 list.insert(true, 2);
@@ -160,7 +164,7 @@ has(element: T): boolean
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<string> = new List();
 list.add("squirrel");
 let result = list.has("squirrel");
 ```
@@ -196,7 +200,7 @@ get(index: number): T
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -238,7 +242,7 @@ getLastIndexOf(element: T): number
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -280,7 +284,7 @@ getIndexOf(element: T): number
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -322,11 +326,11 @@ equal(obj: Object): boolean
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
-let obj = new List();
+let obj: List<number> = new List();
 obj.add(2);
 obj.add(4);
 obj.add(5);
@@ -365,7 +369,7 @@ removeByIndex(index: number): T
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -405,7 +409,7 @@ remove(element: T): boolean
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -448,12 +452,12 @@ callbackfn的参数说明：
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
 list.add(4);
-list.replaceAllElements((value) => {
+list.replaceAllElements((value: number) => {
   // 用户操作逻辑根据实际场景进行添加。
   return value;
 });
@@ -494,13 +498,13 @@ callbackfn的参数说明：
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
 list.add(4);
-list.forEach((value, index) => {
-    console.log("value:" + value, "index:" + index);
+list.forEach((value:number, index:number) => {
+  console.log("value:" + value, "index:" + index);
 });
 ```
 
@@ -536,7 +540,7 @@ comparator的参数说明：
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -578,7 +582,7 @@ getSubList(fromIndex: number, toIndex: number): List&lt;T&gt;
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -605,7 +609,7 @@ clear(): void
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -646,7 +650,7 @@ set(index: number, element: T): T
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number | string> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -679,7 +683,7 @@ convertToArray(): Array&lt;T&gt;
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -712,7 +716,7 @@ isEmpty(): boolean
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -745,7 +749,7 @@ getFirst(): T
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -778,7 +782,7 @@ getLast(): T
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
@@ -811,22 +815,23 @@ let result = list.getLast();
 **示例：**
 
 ```ts
-let list = new List();
+let list: List<number> = new List();
 list.add(2);
 list.add(4);
 list.add(5);
 list.add(4);
 
 // 使用方法一：
-for (let item of list) { 
-  console.log("value: " + item); 
+let items = Array.from(list)
+for (let item of items) {
+  console.log("value: " + item);
 }
 
 // 使用方法二：
 let iter = list[Symbol.iterator]();
-let temp = iter.next().value;
-while(temp != undefined) {
-  console.log("value: " + temp);
-  temp = iter.next().value;
+let temp = iter.next();
+while(!temp.done) {
+  console.log("value: " + temp.value);
+  temp = iter.next();
 }
 ```
\ No newline at end of file
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 311953979e0faefd1d41b3f360cb62dc55f57a4a..654ca7fffe9973041f3e25973505e5edc5165f38 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-plainarray.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-plainarray.md
@@ -53,7 +53,7 @@ PlainArray的构造函数。
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 ```
 
 
@@ -82,7 +82,7 @@ isEmpty(): boolean
 **示例：**
 
 ```ts
-const plainArray = new PlainArray();
+const plainArray: PlainArray<string> = new PlainArray();
 let result = plainArray.isEmpty();
 ```
 
@@ -118,7 +118,7 @@ has(key: number): boolean
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 let result = plainArray.has(1);
 ```
@@ -155,7 +155,7 @@ get(key: number): T
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.get(1);
@@ -193,7 +193,7 @@ getIndexOfKey(key: number): number
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.getIndexOfKey(2);
@@ -231,7 +231,7 @@ getIndexOfValue(value: T): number
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.getIndexOfValue("squirrel");
@@ -269,7 +269,7 @@ getKeyAt(index: number): number
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.getKeyAt(1);
@@ -307,7 +307,7 @@ getValueAt(index: number): T
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.getValueAt(1);
@@ -338,7 +338,7 @@ clone(): PlainArray&lt;T&gt;
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let newPlainArray = plainArray.clone();
@@ -371,7 +371,7 @@ add(key: number, value: T): void
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 ```
 
@@ -407,7 +407,7 @@ remove(key: number): T
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.remove(2);
@@ -445,7 +445,7 @@ removeAt(index: number): T
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.removeAt(1);
@@ -485,7 +485,7 @@ removeRangeFrom(index: number, size: number): number
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.removeRangeFrom(1, 3);
@@ -519,7 +519,7 @@ setValueAt(index: number, value: T): void
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string | number> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 plainArray.setValueAt(1, 3546);
@@ -551,7 +551,7 @@ toString(): String
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 let result = plainArray.toString();
@@ -577,7 +577,7 @@ clear(): void
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 plainArray.clear();
@@ -617,10 +617,10 @@ callbackfn的参数说明：
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
-plainArray.forEach((value, index) => {
+plainArray.forEach((value:string, index: number) => {
     console.log("value:" + value, "index:" + index);
 });
 ```
@@ -651,22 +651,15 @@ plainArray.forEach((value, index) => {
 **示例：**
 
 ```ts
-let plainArray = new PlainArray();
+let plainArray: PlainArray<string> = new PlainArray();
 plainArray.add(1, "squirrel");
 plainArray.add(2, "sparrow");
 
-// 使用方法一：
-for (let item of plainArray) { 
-  console.log("key:" + item[0]);
-  console.log("value:" + item[1]);
-}
-
-// 使用方法二：
 let iter = plainArray[Symbol.iterator]();
-let temp = iter.next().value;
-while(temp != undefined) {
-  console.log("key:" + temp[0]);
-  console.log("value:" + temp[1]);
-  temp = iter.next().value;
+let temp = iter.next();
+while(!temp.done) {
+  console.log("key:" + temp.value[0]);
+  console.log("value:" + temp.value[1]);
+  temp = iter.next();
 }
 ```
\ No newline at end of file