The read-only XRInputSourcesChangeEvent property added is a list of zero or more input sources, each identified using an XRInputSource object, which have been newly made available for use.

An Array of zero or more XRInputSource objects, each representing one input device added to the XR system.

The example below creates a handler for the inputsourceschange event that processes the lists of added and removed from the WebXR system. It looks for new and removed devices whose targetRayMode is tracked-pointer.

xrSession.oninputsourcescchange = (event) => {
  for (const input of event.added) {
    if (input.targetRayMode === "tracked-pointer") {
      addedPointerDevice(input);
    }
  }
  for (const input of event.removed) {
    if (input.targetRayMode === "tracked-pointer") {
      removedPointerDevice(input);
    }
  }
};