DeviceOrientationEvent: alpha property
Baseline
2023
Newly available
Since September 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
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The alpha read-only property of the DeviceOrientationEvent interface 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.