orientationchange

orientationchange事件在设备的纵横方向改变时触发。

Bubbles	No
Cancelable	No
Interface	Event
Event handler	onorientationchange

你可以在addEventListener 方法中使用 orientationchange 事件：

window.addEventListener("orientationchange", function() {
  console.log("the orientation of the device is now " + screen.orientation.angle);
});

或者使用 onorientationchange 事件处理程序属性：

window.onorientationchange = function() {
  console.log("the orientation of the device is now " + screen.orientation.angle);
};