This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The isPresenting
read-only property of the VRDisplay
interface returns a Boolean
indicating whether the VRDisplay
is currently having content presented through it.
Syntax
var isItPresenting = vrDisplayInstance.isPresenting;
Value
A Boolean
; true
means the display is presenting; false
means it isn't.
Examples
function onVRExitPresent () { // No sense in exiting presentation if we're not actually presenting. // (This may happen if we get an event like vrdisplaydeactivate when // we weren't presenting.) if (!vrDisplay.isPresenting) return; vrDisplay.exitPresent().then(function () { // Nothing to do because we're handling things in onVRPresentChange. }, function (err) { var errMsg = "exitPresent failed."; if (err && err.message) { errMsg += "<br/>" + err.message } VRSamplesUtil.addError(errMsg, 2000); }); }
Note: Code snippet taken from Google's VR Presentation demo.
Specifications
Specification | Status | Comment |
---|---|---|
WebVR 1.1 The definition of 'isPresenting' in that specification. |
Editor's Draft | Initial definition |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | No support[1] | (Yes) | 55 (55)[2] | No support | No support | No support |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android | Samsung Internet for GearVR |
---|---|---|---|---|---|---|---|---|
Basic support | No support | No support | 55.0 (55) | No support | No support | No support | (Yes)[3] | (Yes) |
[1] API Available on all platforms behind a flag, but currently only works on desktop in an experimental version of Chrome (other builds won't return any devices when Navigator.getVRDisplays()
is invoked).
[2] Currently only Windows support is enabled by default. Mac support is available in Firefox Nightly.
[3] Currently supported only by Google Daydream.
See also
- WebVR API homepage
- MozVr.com — demos, downloads, and other resources from the Mozilla VR team.