The XRLayerEvent interface of the WebXR Device API is the event type for events related to a change of state of an XRLayer object. These events occur, for example, when the layer needs to be redrawn.

XRLayerEvent() Experimental

Creates and returns a new XRLayerEvent object.

In addition to properties inherited from its parent interface, Event, XRLayerEvent provides the following:

layer Read only Experimental

The XRLayer which generated the event.

While XRSessionEvent defines no methods, it inherits methods from its parent interface, Event.

The following events are represented using the XRLayerEvent interface, and are permitted values for its type parameter.

The redraw event is tent to the layer object when the underlying resources of the layer are lost or when the XR Compositor can no longer reproject the layer. If this event is sent, authors should redraw the content of the layer in the next XR animation frame. It is available on the following layer objects:

• XRQuadLayer: redraw
• XRCylinderLayer: redraw
• XREquirectLayer: redraw
• XRCubeLayer: redraw

• XRCompositionLayer.needsRedraw