update doc

Signed-off-by: Nshawn_he <shawn.he@huawei.com>

en/application-dev/reference/apis/js-apis-pointer.md

+# Mouse Pointer
+
+The mouse pointer module provides APIs related to pointer attribute management.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```js
+import pointer from '@ohos.multimodalInput.pointer';
+```
+
+## pointer.setPointerVisibele
+
+setPointerVisible(visible: boolean, callback: AsyncCallback<void>): void
+
+Sets the visible status of the mouse pointer. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MultimodalInput.Input.Pointer
+
+**Parameters**
+
+| Name    | Type                     | Mandatory| Description                                                               |
+| -------- | ------------------------- | ---- | ------------------------------------------------------------------- |
+| visible  | boolean                   | Yes  | Whether the mouse pointer is visible. The value **true** indicates that the mouse pointer is visible, and the value **false** indicates the opposite.|
+| callback | AysncCallback<void> | Yes  | Callback used to return the result.                                       |
+
+**Example**
+
+```js
+pointer.setPointerVisible(true, (err, data) => {
+    if (err) {
+        console.log(`set pointer visible failed. err=${JSON.stringify(err)}`);
+        return;
+    }
+    console.log(`set pointer visible success.`);
+);
+```
+
+## pointer.setPointerVisible
+
+setPointerVisible(visible: boolean): Promise<void>
+
+Sets the visible status of the mouse pointer. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MultimodalInput.Input.Pointer
+
+**Parameters**
+
+| Name   | Type   | Mandatory| Description                                                               |
+| ------- | ------- | ---- | ------------------------------------------------------------------- |
+| visible | boolean | Yes  | Whether the mouse pointer is visible. The value **true** indicates that the mouse pointer is visible, and the value **false** indicates the opposite.|
+
+**Return value**
+
+| Parameter               | Description                           |
+| ------------------- | ------------------------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Example**
+
+```js
+pointer.setPointerVisible(false).then( data => {
+        console.log(`set mouse pointer visible success`);
+    }, data => {
+    console.log(`set mouse pointer visible failed err=${JSON.stringify(data)}`);
+});
+```
+
+## pointer.isPointerVisible
+
+isPointerVisible(callback: AsyncCallback<boolean>): void
+
+Checks the visible status of the mouse pointer. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.MultimodalInput.Input.Pointer
+
+**Parameters**
+
+| Name    | Type                        | Mandatory| Description                        |
+| -------- | ---------------------------- | ---- | ---------------------------- |
+| callback | AsyncCallback<boolean> | Yes  | Callback used to return the result.|
+
+**Example**
+
+```js
+pointer.isPointerVisible((visible)=>{
+    console.log("The mouse pointer visible attributes is " + visible);
+});
+```
+
+## pointer.isPointerVisible
+
+isPointerVisible(): Promise<boolean>
+
+Checks the visible status of the mouse pointer. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.MultimodalInput.Input.Pointer
+
+**Return value**
+
+| Parameter                  | Description                           |
+| ---------------------- | ------------------------------- |
+| Promise<boolean> | Promise used to return the result.|
+
+**Example**
+
+```js
+pointer.isPointerVisible().then( data => {
+    console.log(`isPointerThen success data=${JSON.stringify(data)}`);
+});
+```