Exposes hand joint data on XrInputSources for use during a WebXr session. This allows developers to have more fine grained interactions during WebXr sessions.
XR systems support tracking of users' hands to allow direct interaction and manipulation of virtual objects in XR applications. This feature provides sites an interface through WebXR to make use of these system hand trackers in a standardized way. https://github.com/immersive-web/webxr-hand-input/blob/main/explainer.md
Samples: https://immersive-web.github.io/webxr-samples/immersive-hands.html