interface Event {
};

dictionary EventInit {
};

[Constructor(DOMString type, optional DeviceOrientationEventInit eventInitDict)]
interface DeviceOrientationEvent : Event {
  readonly attribute double? alpha;
  readonly attribute double? beta;
  readonly attribute double? gamma;
  readonly attribute boolean absolute;
};

dictionary DeviceOrientationEventInit : EventInit {
  double? alpha;
  double? beta;
  double? gamma;
  boolean absolute;
};

[Callback, NoInterfaceObject]
interface DeviceAcceleration {
  readonly attribute double? x;
  readonly attribute double? y;
  readonly attribute double? z;
};

[Callback, NoInterfaceObject]
interface DeviceRotationRate {
  readonly attribute double? alpha;
  readonly attribute double? beta;
  readonly attribute double? gamma;
};

[Constructor(DOMString type, optional DeviceMotionEventInit eventInitDict)]
interface DeviceMotionEvent : Event {
  readonly attribute DeviceAcceleration? acceleration;
  readonly attribute DeviceAcceleration? accelerationIncludingGravity;
  readonly attribute DeviceRotationRate? rotationRate;
  readonly attribute double? interval;
};

dictionary DeviceMotionEventInit : EventInit {
  DeviceAcceleration? acceleration;
  DeviceAcceleration? accelerationIncludingGravity;
  DeviceRotationRate? rotationRate;
  double? interval;
};