Bluetooth.onavailabilitychanged

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

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

The onavailabilitychanged property of the Bluetooth interface is an EventHandler that processes availabilitychanged events that fire when the Bluetooth system as a whole becomes available or unavailable to the User Agent.

Syntax

Bluetooth.onavailabilitychanged = functionRef;

Value

functionRef is the handler function to be called when the Bluetooth availabilitychanged event fires.

Specifications

Specification	Status	Comment
Web Bluetooth The definition of 'Bluetooth' in that specification.	Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`onavailabilitychanged` Experimental	Chrome Full support 56 Notes Full support 56 Notes Notes macOS only. Full support 56 Notes Disabled Notes Linux and versions of Windows earlier than 10. Disabled From version 56: this feature is behind the `#enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags. Full support 70 Notes Notes Windows 10.	Edge Full support ≤79 Notes Full support ≤79 Notes Notes macOS only. Full support ≤79 Notes Disabled Notes Linux and versions of Windows earlier than 10. Disabled From version ≤79: this feature is behind the `#enable-experimental-web-platform-features` preference (needs to be set to `enabled`). Full support ≤79 Notes Notes Windows 10.	Firefox No support No	IE No support No	Opera Full support 43 Notes Full support 43 Notes Notes macOS only. Full support 43 Notes Disabled Notes Linux and versions of Windows earlier than 10. Disabled From version 43: this feature is behind the `#enable-experimental-web-platform-features` preference (needs to be set to `enabled`). Full support 57 Notes Notes Windows 10.	Safari No support No	WebView Android No support No	Chrome Android Full support 56	Firefox Android No support No	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 6.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.

ดูสิ่งนี้ด้วย

Bluetooth.getAvailability