XRReferenceSpace.onreset

The XRReferenceSpace interface's onreset event handler property can be set to a function which is called when the XRReferenceSpace receives a reset event, signaling that the  XR device has experienced a discontinuity large enough to require that the position and/or orientation of the origin be significantly altered to compensate.

An event handler function which will be called whenever the reset event is received by the XRReferenceSpace.

See the reset event documentation for further details.