# NotificationUserInput The **NotificationUserInput** module provides the notification user input. > **NOTE** > > 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. **System capability**: SystemCapability.Notification.Notification | Name | Type | Readable| Writable| Description | | -------- | ------ | --- | ---- | ----------------------------- | | inputKey | string | Yes | Yes | Key to identify the user input.|