diff --git a/zh-cn/application-dev/reference/apis/js-apis-cooperate.md b/zh-cn/application-dev/reference/apis/js-apis-cooperate.md
index dc0a2d34093370ec0f36c32db957d5d50edd250a..c3974d38632d10da466d33739aaa260a6f7ffc49 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-cooperate.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-cooperate.md
@@ -112,6 +112,8 @@ start(sinkDeviceDescriptor: string, srcInputDeviceId: number, callback: AsyncCal
 **示例**：
 
 ```js
+let sinkDeviceDescriptor = "descriptor";
+let srcInputDeviceId = 0;
 try {
   inputDeviceCooperate.start(sinkDeviceDescriptor, srcInputDeviceId, (error) => {
     if (error) {
@@ -160,6 +162,8 @@ start(sinkDeviceDescriptor: string, srcInputDeviceId: number): Promise\<void>
 **示例**：
 
 ```js
+let sinkDeviceDescriptor = "descriptor";
+let srcInputDeviceId = 0;
 try {
   inputDeviceCooperate.start(sinkDeviceDescriptor, srcInputDeviceId).then(() => {
     console.log(`Start Keyboard mouse crossing success.`);
@@ -215,7 +219,7 @@ stop(): Promise\<void>
 
 | 参数名                | 说明                            |
 | --------             | ----------------------------   |
-| Promise\<void>       |  Promise对象，异步返回停止键鼠穿越结果。      | 
+| Promise\<void>       |  Promise对象，异步返回停止键鼠穿越结果。      |
 
 **示例**：
 
@@ -249,6 +253,7 @@ getState(deviceDescriptor: string, callback: AsyncCallback<{ state: boolean }>):
 **示例**：
 
 ```js
+let deviceDescriptor = "descriptor";
 try {
   inputDeviceCooperate.getState(deviceDescriptor, (error, data) => {
     if (error) {
@@ -289,6 +294,7 @@ getState(deviceDescriptor: string): Promise<{ state: boolean }>
 **示例**：
 
 ```js
+let deviceDescriptor = "descriptor";
 try {
   inputDeviceCooperate.getState(deviceDescriptor).then((data) => {
     console.log(`Get the status success, data: ${JSON.stringify(data)}`);
@@ -324,7 +330,7 @@ try {
   inputDeviceCooperate.on('cooperation', (data) => {
     console.log(`Keyboard mouse crossing event: ${JSON.stringify(data)}`);
   });
-} catch (err) {
+} catch (error) {
   console.log(`Register failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
 }
 ```
@@ -350,25 +356,25 @@ off(type: 'cooperation', callback?: AsyncCallback\<void>): void
 
 ```js
 // 取消注册单个回调函数
-callback: function(event) {
+function callback(event) {
   console.log(`Keyboard mouse crossing event: ${JSON.stringify(event)}`);
   return false;
 },
 try {
-  inputDeviceCooperate.on('cooperation', this.callback);
-  inputDeviceCooperate.off("cooperation", this.callback);
+  inputDeviceCooperate.on('cooperation', callback);
+  inputDeviceCooperate.off("cooperation", callback);
 } catch (error) {
   console.log(`Execute failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
 }
 ```
 ```js
 // 取消注册所有回调函数
-callback: function(event) {
+function callback(event) {
   console.log(`Keyboard mouse crossing event: ${JSON.stringify(event)}`);
   return false;
 },
 try {
-  inputDeviceCooperate.on('cooperation', this.callback);
+  inputDeviceCooperate.on('cooperation', callback);
   inputDeviceCooperate.off("cooperation");
 } catch (error) {
   console.log(`Execute failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md b/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
index ecd2d4b1968e32a6ab1c990538bc57c4e898e6f4..6ad7b9bf7af1415ca104854ce87ef89165ba8b92 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
@@ -334,19 +334,19 @@ inputDevice.getDeviceInfo(1).then((deviceData) => {
 
 ## inputDevice.supportKeys<sup>9+</sup>
 
-supportKeys(deviceId: number, keys: Array&lt;KeyCode&gt;, callback: Callback&lt;Array&lt;boolean&gt;&gt;): void
+supportKeys(deviceId: number, keys: Array&lt;KeyCode&gt;, callback: AsyncCallback &lt;Array&lt;boolean&gt;&gt;): void
 
-获取输入设备是否支持指定的键码值，使用Callback异步方式返回结果。
+获取输入设备是否支持指定的键码值，使用AsyncCallback异步方式返回结果。
 
 **系统能力**：SystemCapability.MultimodalInput.Input.InputDevice
 
 **参数**：
 
-| 参数     | 类型                                 | 必填 | 说明                                                   |
-| -------- | ------------------------------------ | ---- | ------------------------------------------------------ |
-| deviceId | number                               | 是   | 输入设备id，同一个物理设备反复插拔，设备id会发生变化。 |
-| keys     | Array&lt;KeyCode&gt;                 | 是   | 需要查询的键码值，最多支持5个按键查询。                |
-| callback | Callback&lt;Array&lt;boolean&gt;&gt; | 是   | 回调函数，异步返回查询结果。                           |
+| 参数     | 类型                                      | 必填 | 说明                                                   |
+| -------- | ----------------------------------------- | ---- | ------------------------------------------------------ |
+| deviceId | number                                    | 是   | 输入设备id，同一个物理设备反复插拔，设备id会发生变化。 |
+| keys     | Array&lt;KeyCode&gt;                      | 是   | 需要查询的键码值，最多支持5个按键查询。                |
+| callback | AsyncCallback&lt;Array&lt;boolean&gt;&gt; | 是   | 回调函数，异步返回查询结果。                           |
 
 **示例**：
 
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputeventclient.md b/zh-cn/application-dev/reference/apis/js-apis-inputeventclient.md
index 80d1a26688e276daea5ed1572764368ef93fb8ba..d23d842670d79d7b06a1b1a437ade4482354e299 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-inputeventclient.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputeventclient.md
@@ -41,7 +41,7 @@ try {
     keyDownDuration: 0,
     isIntercepted: false
   }
-  inputEventClient.injectKeyEvent({ KeyEvent: backKeyDown });
+  inputEventClient.injectEvent({ KeyEvent: backKeyDown });
 
   let backKeyUp = {
     isPressed: false,
@@ -49,7 +49,7 @@ try {
     keyDownDuration: 0,
     isIntercepted: false
   };
-  inputEventClient.injectKeyEvent({ KeyEvent: backKeyUp });
+  inputEventClient.injectEvent({ KeyEvent: backKeyUp });
 } catch (error) {
   console.log(`Failed to inject KeyEvent, error: ${JSON.stringify(error, [`code`, `message`])}`);
 }
diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputmonitor.md b/zh-cn/application-dev/reference/apis/js-apis-inputmonitor.md
index 242b63a32ab5337185af44603502d634ae068b2b..85716542e22921480952629fdc7d034f51f2ee1f 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-inputmonitor.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputmonitor.md
@@ -194,7 +194,7 @@ try {
 ```js
 try {
   inputMonitor.on("touch", touchEvent => {
-    if (touchEvent.touches.size() == 3) { // 当前有三个手指按下
+    if (touchEvent.touches.length == 3) { // 当前有三个手指按下
       return true;
     } else {
       return false;