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+// Archived version of the WebVR spec from
+// https://w3c.github.io/webvr/archive/prerelease/1.1/index.html
+
+[Exposed=Window]
+interface VRDisplay : EventTarget {
+  readonly attribute boolean isPresenting;
+
+  /**
+   * Dictionary of capabilities describing the VRDisplay.
+   */
+  [SameObject] readonly attribute VRDisplayCapabilities capabilities;
+
+  /**
+   * If this VRDisplay supports room-scale experiences, the optional
+   * stage attribute contains details on the room-scale parameters.
+   * The stageParameters attribute can not change between null
+   * and non-null once the VRDisplay is enumerated; however,
+   * the values within VRStageParameters may change after
+   * any call to VRDisplay.submitFrame as the user may re-configure
+   * their environment at any time.
+   */
+  readonly attribute VRStageParameters? stageParameters;
+
+  /**
+   * Return the current VREyeParameters for the given eye.
+   */
+  VREyeParameters getEyeParameters(VREye whichEye);
+
+  /**
+   * An identifier for this distinct VRDisplay. Used as an
+   * association point in the Gamepad API.
+   */
+  readonly attribute unsigned long displayId;
+
+  /**
+   * A display name, a user-readable name identifying it.
+   */
+  readonly attribute DOMString displayName;
+
+  /**
+   * Populates the passed VRFrameData with the information required to render
+   * the current frame.
+   */
+  boolean getFrameData(VRFrameData frameData);
+
+  /**
+   * z-depth defining the near plane of the eye view frustum
+   * enables mapping of values in the render target depth
+   * attachment to scene coordinates. Initially set to 0.01.
+   */
+  attribute double depthNear;
+
+  /**
+   * z-depth defining the far plane of the eye view frustum
+   * enables mapping of values in the render target depth
+   * attachment to scene coordinates. Initially set to 10000.0.
+   */
+  attribute double depthFar;
+
+  /**
+   * The callback passed to `requestAnimationFrame` will be called
+   * any time a new frame should be rendered. When the VRDisplay is
+   * presenting the callback will be called at the native refresh
+   * rate of the HMD. When not presenting this function acts
+   * identically to how window.requestAnimationFrame acts. Content should
+   * make no assumptions of frame rate or vsync behavior as the HMD runs
+   * asynchronously from other displays and at differing refresh rates.
+   */
+  long requestAnimationFrame(FrameRequestCallback callback);
+
+  /**
+   * Passing the value returned by `requestAnimationFrame` to
+   * `cancelAnimationFrame` will unregister the callback.
+   */
+  undefined cancelAnimationFrame(long handle);
+
+  /**
+   * Begin presenting to the VRDisplay. Must be called in response to a user gesture.
+   * Repeat calls while already presenting will update the layers being displayed.
+   * If the number of values in the leftBounds/rightBounds arrays is not 0 or 4 for any of the passed layers the promise is rejected
+   * If the source of any of the layers is not present (null), the promise is rejected.
+   */
+  Promise<undefined> requestPresent(sequence<VRLayerInit> layers);
+
+  /**
+   * Stops presenting to the VRDisplay.
+   */
+  Promise<undefined> exitPresent();
+
+  /**
+   * Get the layers currently being presented.
+   */
+  sequence<VRLayerInit> getLayers();
+
+  /**
+   * The layer provided to the VRDisplay will be captured and presented
+   * in the HMD. Calling this function has the same effect on the source
+   * canvas as any other operation that uses its source image, and canvases
+   * created without preserveDrawingBuffer set to true will be cleared.
+   */
+  undefined submitFrame();
+};
+
+typedef (HTMLCanvasElement or
+         OffscreenCanvas) VRSource;
+
+dictionary VRLayerInit {
+  VRSource? source = null;
+
+  sequence<float> leftBounds = [];
+  sequence<float> rightBounds = [];
+};
+
+[Exposed=Window]
+interface VRDisplayCapabilities {
+  readonly attribute boolean hasPosition;
+  readonly attribute boolean hasExternalDisplay;
+  readonly attribute boolean canPresent;
+  readonly attribute unsigned long maxLayers;
+};
+
+enum VREye {
+  "left",
+  "right"
+};
+
+[Exposed=Window]
+interface VRPose {
+  readonly attribute Float32Array? position;
+  readonly attribute Float32Array? linearVelocity;
+  readonly attribute Float32Array? linearAcceleration;
+
+  readonly attribute Float32Array? orientation;
+  readonly attribute Float32Array? angularVelocity;
+  readonly attribute Float32Array? angularAcceleration;
+};
+
+[Exposed=Window]
+interface VRFrameData {
+  constructor();
+
+  readonly attribute Float32Array leftProjectionMatrix;
+  readonly attribute Float32Array leftViewMatrix;
+
+  readonly attribute Float32Array rightProjectionMatrix;
+  readonly attribute Float32Array rightViewMatrix;
+
+  readonly attribute VRPose pose;
+};
+
+[Exposed=Window]
+interface VREyeParameters {
+  readonly attribute Float32Array offset;
+
+  readonly attribute unsigned long renderWidth;
+  readonly attribute unsigned long renderHeight;
+};
+
+[Exposed=Window]
+interface VRStageParameters {
+  readonly attribute Float32Array sittingToStandingTransform;
+
+  readonly attribute float sizeX;
+  readonly attribute float sizeZ;
+};
+
+partial interface Navigator {
+  Promise<sequence<VRDisplay>> getVRDisplays();
+  readonly attribute FrozenArray<VRDisplay> activeVRDisplays;
+  readonly attribute boolean vrEnabled;
+};
+
+enum VRDisplayEventReason {
+  "mounted",
+  "navigation",
+  "requested",
+  "unmounted"
+};
+
+[Exposed=Window]
+interface VRDisplayEvent : Event {
+  constructor(DOMString type, VRDisplayEventInit eventInitDict);
+  readonly attribute VRDisplay display;
+  readonly attribute VRDisplayEventReason? reason;
+};
+
+dictionary VRDisplayEventInit : EventInit {
+  required VRDisplay display;
+  VRDisplayEventReason reason;
+};
+
+partial interface Window {
+  attribute EventHandler onvrdisplayconnect;
+  attribute EventHandler onvrdisplaydisconnect;
+  attribute EventHandler onvrdisplayactivate;
+  attribute EventHandler onvrdisplaydeactivate;
+  attribute EventHandler onvrdisplayblur;
+  attribute EventHandler onvrdisplayfocus;
+  attribute EventHandler onvrdisplaypresentchange;
+};
+
+partial interface Gamepad {
+  readonly attribute unsigned long displayId;
+};