Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The BluetoothRemoteGATTDescriptor interface of the Web Bluetooth API provides a GATT Descriptor, which provides further information about a characteristic's value.

Instance properties

BluetoothRemoteGATTDescriptor.characteristic Read only Experimental

Returns the BluetoothRemoteGATTCharacteristic this descriptor belongs to.

BluetoothRemoteGATTDescriptor.uuid Read only Experimental

Returns the UUID of the characteristic descriptor, for example '00002902-0000-1000-8000-00805f9b34fb' for theClient Characteristic Configuration descriptor.

BluetoothRemoteGATTDescriptor.value Read only Experimental

Returns the currently cached descriptor value. This value gets updated when the value of the descriptor is read.

Instance methods

BluetoothRemoteGATTDescriptor.readValue() Experimental

Returns a Promise that resolves to an ArrayBuffer holding a duplicate of the value property if it is available and supported. Otherwise it throws an error.

BluetoothRemoteGATTDescriptor.writeValue() Experimental

Sets the value property to the bytes contained in an ArrayBuffer and returns a Promise.


Web Bluetooth
# bluetoothgattdescriptor-interface

Browser compatibility

BCD tables only load in the browser