The hasOrientation read-only property of the VRPositionState interface returns a boolean indicating whether the VRPositionState.orientation property is valid (i.e. if the hardware is currently registering a valid orientation). If it is false, the orientation property will return null.

API Experimental Expérimental hasOrientation Obsolete Property Reference Référence Virtual Reality VR VRPositionState WebVR

The hasPosition read-only property of the VRPositionState interface returns a boolean indicating whether the VRPositionState.position property is valid (i.e. if the hardware is currently registering a valid position). If it is false, the position property will return null.

API Experimental Expérimental hasPosition Obsolete Property Reference Référence Virtual Reality VR VRPositionState WebVR