This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
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 | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | Yes1 2 | Yes | 553 584 | No | ? | ? |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | No | Yes5 | ? | ? | No | ? | ? |
1. Only works on desktop in an experimental version of Chrome (other builds won't return any devices when Navigator.getVRDisplays()
is invoked).
2. This feature is behind the WebVR
preference. To change preferences in Chrome, visit chrome://flags.
3. Windows support was enabled in Firefox 55.
4. macOS support was enabled in Firefox 58.
5. Currently supported only by Google Daydream.
See also
- WebVR API homepage
- MozVr.com — demos, downloads, and other resources from the Mozilla VR team.