Web/API/DeviceOrientationEvent/alpha

Returns the rotation of the device around the Z axis; that is, the number of degrees by which the device is being twisted around the center of the screen. See Orientation and motion data explained for details.

Syntax

var alpha = instanceOfDeviceOrientationEvent.alpha;

Specifications

Specification	Status	Comment
DeviceOrientation Event Specification	Editor's Draft	Initial specification.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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
alpha Experimental'	Chrome Full support 7	Edge Full support 12	Firefox Full support 6	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support 4.2	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

See also

• DeviceOrientationEvent
• Detecting device orientation
• Orientation and motion data explained
• window.ondeviceorientation
• deviceorientation

DeviceOrientationEvent.alpha by Mozilla Contributors is licensed under CC-BY-SA 2.5.