update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

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

+# Standard NFC Card Emulation
+
+This module is used to implement Near-Field Communication (NFC) card emulation.
+
+> **NOTE**<br>
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## **Modules to Import**
+
+```
+import cardEmulation from '@ohos.nfc.cardEmulation';
+```
+
+
+## cardEmulation.isSupported
+
+isSupported(feature: number): boolean
+
+Checks whether a certain type of card emulation is supported.
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+  | **Type**| **Description**|
+  | -------- | -------- |
+  | boolean | Returns **true** if the card emulation is supported; returns **false** otherwise.|
+
+## HceService
+
+Implements Host-based Card Emulation (HCE). Before calling any API in **HceService**, you must use **new cardEmulation.HceService()** to create an **HceService** instance.
+
+### startHCE
+
+startHCE(aidList: string[]): boolean
+
+Starts HCE.
+
+**Required permissions**: ohos.permission.NFC_CARD_EMULATION
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Parameters**
+
+| Name | Type    | Mandatory| Description                   |
+| ------- | -------- | ---- | ----------------------- |
+| aidList | string[] | Yes  | Aid list to be registered for card emulation.|
+
+### stopHCE
+
+stopHCE(): boolean
+
+Stops HCE.
+
+**Required permissions**: ohos.permission.NFC_CARD_EMULATION
+
+**System capability**: SystemCapability.Communication.NFC
+
+### on
+
+on(type: "hceCmd", callback: AsyncCallback<number[]>): void;
+
+Subscribes to messages from the peer device after **startHCE()**.
+
+**Required permissions**: ohos.permission.NFC_CARD_EMULATION
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Parameters**
+
+| Name  | Type                   | Mandatory| Description                                        |
+| -------- | ----------------------- | ---- | -------------------------------------------- |
+| type     | string                  | Yes  | Event type to subscribe to. The value is **hceCmd**.                        |
+| callback | AsyncCallback<number[]> | Yes  | Callback invoked to return the subscribed event. The input parameter is a data array that complies with the Application Protocol Data Unit (APDU).|
+
+### sendResponse
+
+sendResponse(responseApdu: number[]): void;
+
+Sends data to the peer device.
+
+**Required permissions**: ohos.permission.NFC_CARD_EMULATION
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Parameters**
+
+| Name      | Type    | Mandatory| Description                                              |
+| ------------ | -------- | ---- | -------------------------------------------------- |
+| responseApdu | number[] | Yes  | Data to send, which is an array that complies with the APDU.|
+
+**Example**
+
+```js
+var hceService = new cardEmulation.HceService();
+hceService.startHCE([
+    "F0010203040506", "A0000000041010"
+])
+hceService.stopHCE();
+hceService.on("hceCmd", (err, res) => {
+    if(err.data === 0) {
+        console.log('callback => Operation hceCmd succeeded. Data: ' + JSON.stringify(res));
+          hceService.sendResponse([0x00,0xa4,0x04,0x00,
+          0x0e,0x32,0x50,0x41,0x59,0x2e,0x53,0x59,0x53,0x2e,0x44,0x44,
+          0x46,0x30,0x31,0x00]);
+    } else {
+        console.log('callback => Operation hceCmd failed. Cause: ' + err.data);
+    }
+})
+```

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

+# Standard NFC
+
+This module is used to implement Near-Field Communication (NFC).
+
+> **NOTE**<br>
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## **Modules to Import**
+
+```
+import controller from '@ohos.nfc.controller';
+```
+
+
+## controller.isNfcAvailable
+
+isNfcAvailable(): boolean
+
+Checks whether NFC is available.
+
+**Return value**
+
+| **Type**| **Description**|
+| -------- | -------- |
+| boolean | Returns **true** if NFC is available; returns **false** otherwise.|
+
+
+## controller.openNfc
+
+openNfc(): boolean
+
+Opens NFC.
+
+**Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise. |
+
+## controller.closeNfc
+
+closeNfc(): boolean
+
+Closes NFC.
+
+**Required permissions**: ohos.permission.MANAGE_SECURE_SETTINGS
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**                                   |
+| -------- | ------------------------------------------- |
+| boolean  | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+## controller.isNfcOpen
+
+isNfcOpen(): boolean
+
+Checks whether NFC is open.
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**                           |
+| -------- | ----------------------------------- |
+| boolean  | Returns **true** if NFC is open; returns **false** otherwise.|
+
+## controller.getNfcState
+
+getNfcState(): NfcState
+
+Obtains the NFC state.
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**              |
+| -------- | ---------------------- |
+| NfcState | NFC state obtained. For details, see [NfcState](#nfc-state).|
+
+## controller.on('nfcStateChange')
+
+on(type: "nfcStateChange", callback: Callback&lt;NfcState&gt;): void
+
+Registers NFC state changes.
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Parameter**
+  
+  | **Name**| **Type**| **Mandatory**| **Description**|
+  | -------- | -------- | -------- | -------- |
+  | type | string | Yes| Event type to subscribe to. The value is **nfcStateChange**.|
+  | callback | Callback&lt;NfcState&gt; | Yes| Callback invoked to return the NFC state changes.|
+
+
+
+## controller.off('nfcStateChange')
+
+off(type: "nfcStateChange", callback?: Callback&lt;NfcState&gt;): void
+
+Unregisters the NFC state changes.
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Parameter**
+  
+  | **Name**| **Type**| **Mandatory**| **Description**|
+  | -------- | -------- | -------- | -------- |
+  | type | string | Yes| Event type to unsubscribe from. The value is **nfcStateChange**.|
+| callback | Callback&lt;NfcState&gt; | No| Callback used to return the NFC state changes. If this parameter is not specified, all callbacks associated with the specified event will be unregistered.|
+  
+**Example**
+
+  ```js
+  import nfcController from '@ohos.nfcController';
+  
+  var NFC_STATE_NOTIFY = "nfcStateChange";
+  
+  var recvNfcStateNotifyFunc = result => {
+      console.info("nfc state receive state: " + result);
+  }
+  
+  // Register the NFC state changes.
+  nfcController.on(NFC_STATE_NOTIFY, recvNfcStateNotifyFunc);
+  
+  // Unregister the NFC state changes.
+  nfcController.off(NFC_STATE_NOTIFY, recvNfcStateNotifyFunc);
+  ```
+
+## NfcState
+
+Enumerates the NFC states.
+
+| Name| Default Value| Description|
+| -------- | -------- | -------- |
+| STATE_OFF | 1 | Off|
+| STATE_TURNING_ON | 2 | Turning on|
+| STATE_ON | 3      | On|
+| STATE_TURNING_OFF | 4      | Turning off|

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

+# Standard NFC Tag
+
+This module is used to manage Near-Field Communication (NFC) tags.
+
+> **NOTE**<br>
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+
+## **Modules to Import**
+
+```
+import tag from '@ohos.nfc.tag';
+```
+
+
+## tag.getNfcATag
+
+getNfcATag(tagInfo: TagInfo): NfcATag
+
+Obtains the **NfcATag** object, which allows access to the tags that use the NfcA technology.
+
+**Required permissions**: ohos.permission.NFC_TAG
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**|
+| -------- | -------- |
+| NfcATag | **NfcATag** object obtained.|
+
+## tag.getNfcBTag
+
+getNfcBTag(tagInfo: TagInfo): NfcBTag
+
+Obtains the **NfcBTag** object, which allows access to the tags that use the NfcB technology.
+
+**Required permissions**: ohos.permission.NFC_TAG
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**        |
+| -------- | ---------------- |
+| NfcBTag  | **NfcBTag** object obtained.|
+
+## tag.getNfcFTag
+
+getNfcFTag(tagInfo: TagInfo): NfcFTag
+
+Obtains the **NfcFTag** object, which allows access to the tags that use the NfcF technology.
+
+**Required permissions**: ohos.permission.NFC_TAG
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**        |
+| -------- | ---------------- |
+| NfcFTag  | **NfcFTag** object obtained.|
+
+## tag.getNfcVTag
+
+getNfcVTag(tagInfo: TagInfo): NfcVTag
+
+Obtains the **NfcVTag** object, which allows access to the tags that use the NfcV technology.
+
+**Required permissions**: ohos.permission.NFC_TAG
+
+**System capability**: SystemCapability.Communication.NFC
+
+**Return value**
+
+| **Type**| **Description**        |
+| -------- | ---------------- |
+| NfcVTag  | **NfcVTag** object obtained.|