Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The HTTP Feature-Policy header xr-spatial-tracking directive controls whether the current document is allowed to use the WebXR Device API. This policy controls whether navigator.xr.requestSession() can return XRSession that requires spatial tracking and whether user agent can indicate support for sessions supporting spatial tracking via navigator.xr.isSessionSupported() and devicechange event on navigator.xr object.