MDN wants to talk to developers like you:


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 isConnected read-only property of the VRDisplay interface returns a Boolean indicating whether the VRDisplay is connected to the computer.


var isItConnected = vrDisplayInstance.isConnected;


A Boolean; true means the display is connected; false means it isn't.


navigator.getVRDisplays().then(function(displays) {
  // If a display is available, use it to present the scene
  if(displays.length > 0) {
    vrDisplay = displays[0];
    // Starting the presentation when the button is clicked: It can only be called in response to a user gesture
    btn.addEventListener('click', function() {
      // Only request presentation if the display is still connected.
      if(vrDisplay.isConnected) {
        vrDisplay.requestPresent([{ source: canvas }]).then(function() {
          // start rendering the app, etc.
      } else {
        console.log('Connection to display lost');


Specification Status Comment
WebVR 1.1
The definition of 'isConnected' 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

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, abbycar
 Last updated by: chrisdavidmills,