The availabilitychanged event fires when the Bluetooth system as a whole becomes available or unavailable to the User Agent.

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("availabilitychanged", (event) => { })

onavailabilitychanged = (event) => { }

A generic Event.

To be informed when Bluetooth availability changes, you can add a handler to your Bluetooth instance using addEventListener(), like this:

Bluetooth.addEventListener("availabilitychanged", (event) => {
  const availability = event.value;
});

Alternatively, you can use the Bluetooth.onavailabilitychanged event handler property to establish a handler for the availabilitychanged event:

Bluetooth.onavailabilitychanged = (event) => {
  const availability = event.value;
};

• Bluetooth.getAvailability