Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
Note: This property was part of the old WebVR API. It has been superseded by the WebXR Device API.
The hasExternalDisplay read-only property of the VRDisplayCapabilities interface returns true if the VR display is separate from the device's primary display.
Note: If presenting VR content would obscure other content on the device, this will return false, in which case the application should not attempt to mirror VR content or update non-VR UI because that content will not be visible.