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 getAvailability()
method of Bluetooth
interface of Web Bluetooth API interface exposes the Bluetooth capabilities of the current device. For a returns a Boolean
which is true
if the deveice has a Bluetooth adapter and false otherwise (unless user configured User Agent not to expose a real value).
Note: User might not allow use of Web Bluetooth API, even if getAvailability()
returned true
(navigator.bluetooth.requestDevice()
might not resolve with a BluetoothDevice
). Also, user can configure User Agent to return a fixed value instead of a real one.
Syntax
var readerPromise = Bluetooth.getAvailability();
Parameters
None.
Return value
A Promise
that resolves with Boolean
.
Exceptions
This method doesn't throw any exceptions.
Examples
The following snippet prints out a message in the console specifying wheter or not Bluetooth is supported:
navigator.bluetooth.getAvailability().then(available => { if (available) console.log("This device supports Bluetooth!"); else console.log("Doh! Bluetooth is not supported"); });
Specifications
Specification | Status | Comment |
---|---|---|
Web Bluetooth The definition of 'getAvailability()' in that specification. |
Draft | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
getAvailability | Chrome
Full support
56
| Edge
Full support
≤79
| Firefox No support No | IE No support No | Opera
Full support
43
| 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.