# Vibrator Development


## When to Use

You can set different vibration effects as needed, for example, customizing the vibration intensity, frequency, and duration for button touches, alarm clocks, and incoming calls.

For details about the APIs, see [Vibrator](../reference/apis/js-apis-vibrator.md).


## Available APIs

| Module         | API                                                      | Description                                                        |
| ------------- | ------------------------------------------------------------ | ------------------------------------------------------------ |
| ohos.vibrator | startVibration(effect: VibrateEffect, attribute: VibrateAttribute): Promise<void> | Starts vibration with the specified effect and attribute. This API uses a promise to return the result.|
| ohos.vibrator | startVibration(effect: VibrateEffect, attribute: VibrateAttribute, callback: AsyncCallback<void>): void | Starts vibration with the specified effect and attribute. This API uses an asynchronous callback to return the result.|
| ohos.vibrator | stopVibration(stopMode: VibratorStopMode): Promise<void> | Stops vibration in the specified mode. This API uses a promise to return the result.                                |
| ohos.vibrator | stopVibration(stopMode: VibratorStopMode, callback: AsyncCallback<void>): void | Stops vibration in the specified mode. This API uses an asynchronous callback to return the result.                                |


## How to Develop

1. Before using the vibrator on a device, you must declare the **ohos.permission.VIBRATE** permission. For details about how to configure a permission, see [Declaring Permissions](../security/accesstoken-guidelines.md).

2. Start vibration with the specified effect and attribute.

   ```js
   import vibrator from '@ohos.vibrator';
   try {
       vibrator.startVibration({
           type: 'time',
           duration: 1000,
       }, {
           id: 0,
           usage: 'alarm'
       }, (error) => {
           if (error) {
               console.error('vibrate fail, error.code: ' + error.code + 'error.message: ', + error.message);
               return;
           }
           console.log('Callback returned to indicate a successful vibration.');
       });
   } catch (err) {
       console.error('errCode: ' + err.code + ' ,msg: ' + err.message);
   }
   ```

3. Stop vibration in the specified mode.

   ```js
   import vibrator from '@ohos.vibrator';
   try {
     // Stop vibration in VIBRATOR_STOP_MODE_TIME mode.
     vibrator.stopVibration(vibrator.VibratorStopMode.VIBRATOR_STOP_MODE_TIME, function (error) {
         if (error) {
             console.log('error.code' + error.code + 'error.message' + error.message);
             return;
         }
         console.log('Callback returned to indicate successful.');
     })
   } catch (err) {
     console.info('errCode: ' + err.code + ' ,msg: ' + err.message);
   }
   ```