The VRStageParameters interface of the WebVR API represents the values describing the the stage area for devices that support room-scale experiences.

API Experimental Interface Reference Virtual Reality VR VRStageParameters WebVR

The sittingToStandingTransform read-only property of the VRStageParameters interface contains a matrix that transforms the sitting-space position returned by VRDisplay.getPose()/VRDisplay.getImmediatePose() into a standing-space position.

API Experimental Property Reference sittingToStandingTransform Virtual Reality VR VRStageParameters WebVR

The sizeX read-only property of the VRStageParameters interface returns the width of the play-area bounds in meters.

API Experimental Property Reference sizeX Virtual Reality VR VRStageParameters WebVR

The sizeY read-only property of the VRStageParameters interface returns the depth of the play-area bounds in meters.

API Experimental Property Reference sizeY Virtual Reality VR VRStageParameters WebVR