/Web APIs


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Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The WebXR Device API's XRBoundedReferenceSpace interface describes a virtual world reference space which has preset boundaries. This extends XRReferenceSpace, which describes an essentially unrestricted space around the viewer's position. These bounds are defined using an array of points, each of which defines a vertex in a polygon inside which the user is allowed to move.

This is typically used when the XR system is capable of tracking the user's physical movement within a limited distance of their starting position. The specified bounds may, in fact, describe the shape and size of the room the user is located in, in order to let the WebXR site or application prevent the user from colliding with the walls or other obstacles in the real world. At a minimum, the boundaries indicate the area in which the XR device is capable of tracking the user's movement. See the article Using bounded reference spaces for details on how bounded spaces work and why they're useful.

EventTarget XRSpace XRReferenceSpace XRBoundedReferenceSpace

Instance properties

In addition to the properties of XRReferenceSpace, XRBoundedReferenceSpace includes the following:

boundsGeometry Read only Experimental

An array of DOMPointReadOnly objects, each of which defines a vertex in the polygon defining the boundaries within which the user will be required to remain. These vertices must be sorted such that they move clockwise around the viewer's position.

Instance methods

XRBoundedReferenceSpace inherits the methods of its parent interface, XRReferenceSpace. It has no further methods.


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
XRBoundedReferenceSpace 79 79 No No 66 No No 79 No 57 No 11.2
boundsGeometry 79 79 No No 66 No No 79 No 57 No 11.2

See also

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