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 了解细节。
var alpha = instanceOfDeviceOrientationEvent.alpha;
| 规范 | 状态 | 注释 |
|---|---|---|
| DeviceOrientation Event Specification | 编者草案 | 最初的规范。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
alpha
|
Chrome 7 | Edge 12 | Firefox 6 | IE No | Opera Yes | Safari ? | WebView Android Yes | Chrome Android Yes | Firefox Android 6 | Opera Android Yes | Safari iOS 4.2 | Samsung Internet Android Yes |
完整支持
不支持
兼容性未知
实验。期望将来行为有所改变。
DeviceOrientationEvent
window.ondeviceorientation
deviceorientation
DeviceOrientationEvent