Bluetooth.getAvailability() - Web APIs
the getavailability() method of bluetooth interface of web bluetooth api interface exposes the bluetooth capabilities of the current device.
... note: user might not allow use of web bluetooth api, even if getavailability() returned true (navigator.bluetooth.requestdevice() might not resolve with a bluetoothdevice).
... syntax var readerpromise = bluetooth.getavailability(); parameters none.
...And 2 more matches

Bluetooth - Web APIs
interface interface bluetooth : eventtarget { promise<boolean> getavailability(); attribute eventhandler onavailabilitychanged; [sameobject] readonly attribute bluetoothdevice?
... methods bluetooth.getavailability() returns a promise that resolved to a boolean indicating whether the user-agent has the ability to support bluetooth.