https://developer.mozilla.org/en-US/docs/Web/API/XRInputSourceEvent
XRInputSourceEvent - Web APIs | MDN
The WebXR Device API's XRInputSourceEvent interface describes an event which has occurred on a WebXR user input device such as a hand controller, gaze tracking...
web apisxrinputsourceeventmdn
https://developer.mozilla.org/en-US/docs/Web/API/XRInputSourceEvent/XRInputSourceEvent
XRInputSourceEvent: XRInputSourceEvent() constructor - Web APIs | MDN
The XRInputSourceEvent() constructor creates and returns a new XRInputSourceEvent object describing an event (state change) which has occurred on a WebXR user...
constructor webxrinputsourceeventapismdn