The claimInterface() method of the USBDevice interface returns a promise that resolves when the requested interface is claimed for exclusive access.

interfaceNumber

The index of one of the interfaces supported by the device. Interfaces are device specific.

A promise.

The following example shows claimInterface() in the context of connecting to a USB device.

async function connectDevice(usbDevice) {
  await usbDevice.open();
  if (usbDevice.configuration === null) await usbDevice.selectConfiguration(1);
  await usbDevice.claimInterface(0);
}