How to detect when a page exits fullscreen?

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I'm creating a 3D multiplayer game with Three.js, where players can join various existing games. Once "play" is clicked, the renderer is appended to the page and fullscreens. This works great, but the problem is that, when I exit the fullscreen, it still stays appended. I'd like to remove it, but I don't know when!

So, basically, I'm looking for an event that says "this element exited fullscreen".

This is how I append the renderer to the page:

container = document.getElementById('container');
document.body.appendChild(container);

var renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setSize( WIDTH, HEIGHT);
container.appendChild( renderer.domElement );

This if how I fullscreen it:

THREEx.FullScreen.request(container); 
renderer.setSize(screen.width, screen.height);

Also, is there a way to stop that annoying header from appearing whenever someone points his mouse to the top of the page? And, I guess I can just prevent escape from doing what it does (exiting fullscreen) in Firefox and Chrome with preventDefault?

EDIT:

The "fullscreenchange" event is indeed fired, but it has different names under different browsers. For example, on Chrome it's called "webkitfullscreenchange", and on Firefox it's "mozfullscreenchange".


The Fullscreen spec specifies that the "fullscreenchange" (with the appropriate prefix) event is fired on the document any time the fullscreen state of the page changes, that includes going into and out of full screen. Inside that event you can check document.fullScreenElement to see if the page is fullscreen or not. If it's fullscreen the property will be non-null.

Check out MDN for more details.

As for your other questions: No, there is no way to prevent Esc from exiting fullscreen. That's the compromise that was made to ensure that the user always has control over what their browser is doing. The browser will never give you a way to prevent users from exiting fullscreen. Period.

As for Firefox being slower at rendering than Chrome, I can assure you that for most practical purposes it's not. If you're seeing a large difference in performance between the two browsers that probably means your javascript code is the bottleneck, not the GPU.

How to detect when a page exits fullscreen?, The Document method exitFullscreen() requests that the element on this If an error occurs while attempting to exit full-screen mode, the  When you are finished using full-screen mode, press F11 on the keyboard again, as F11 acts as a toggle. Full-screen and maximized modes aren't the same. Full-screen mode takes up the entire screen and shows only what's on the web page itself.


Here's how I did it:

if (document.addEventListener)
{
 document.addEventListener('fullscreenchange', exitHandler, false);
 document.addEventListener('mozfullscreenchange', exitHandler, false);
 document.addEventListener('MSFullscreenChange', exitHandler, false);
 document.addEventListener('webkitfullscreenchange', exitHandler, false);
}

function exitHandler()
{
 if (document.webkitIsFullScreen || document.mozFullScreen || document.msFullscreenElement !== null)
 {
  // Run code on exit
 }
}

Supports Opera, Safari, Chrome with webkit, Firefox/Gecko with moz, IE 11 with MSFullScreenChange, and will support the actual spec with fullscreenchange once it's been successfully implemented in all of the browsers. Obviously, Fullscreen API is only supported in the modern browsers, so I did not provide attachEvent fallbacks for older versions of IE.

Document.exitFullscreen(), fullscreenchange Event. ❮ DOM Events ❮ Event Object. Example. Display some text when the page is viewed in fullscreen mode: document  You can exit a full screen on your Windows 10 computer with the press of a button. Full-screen mode allows you to examine a page in greater detail and without distractions. Using the F11 key on


API for browsers changed. For example: there is no document.webkitIsFullScreen in Chrome. This is what worked for me:

document.addEventListener("fullscreenchange", onFullScreenChange, false);
document.addEventListener("webkitfullscreenchange", onFullScreenChange, false);
document.addEventListener("mozfullscreenchange", onFullScreenChange, false);

onFullScreenChange() {
  var fullscreenElement = document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement;

  // if in fullscreen mode fullscreenElement won't be null
}

fullscreenchange Event, The Fullscreen spec specifies that the "fullscreenchange" (with the appropriate prefix) event is fired on the document any time the fullscreen state of the page  onkeydown can be used to detect the F11 key being pressed to enter fullscreen. onkeyup can be used to detect the F11 key being pressed to exit fullscreen. Use that in conjunction with checking for keyCode == 122. The tricky part would be to tell the keydown/keyup not to execute its code if the other one just did.


i'm using John Dyer's code, integrated with Toni, and Yannbane's comments to create a central handler, and adding multiple listeners to call it:

   var changeHandler = function(){                                           
      //NB the following line requrires the libary from John Dyer                         
      var fs = window.fullScreenApi.isFullScreen();
      console.log("f" + (fs ? 'yes' : 'no' ));                               
      if (fs) {                                                              
        alert("In fullscreen, I should do something here");                  
      }                                                                      
      else {                                                                 
        alert("NOT In fullscreen, I should do something here");              
      }                                                                      
   }                                                                         
   document.addEventListener("fullscreenchange", changeHandler, false);      
   document.addEventListener("webkitfullscreenchange", changeHandler, false);
   document.addEventListener("mozfullscreenchange", changeHandler, false);

This is only tested in Moz 12.

Please feel free to expand

Is there an easy way to detect a fullscreen change event? · Issue , proper event for detecting a fullscreen change using the fullscreen button. addEventListener("exitedfullscreen", function(){ console.log("exit  1 Answer1. active oldest votes. 2. The MSFullscreenChange event is fired after an element enters or exits full-screen mode, so you can get the current state. In the example, we check the msFullscreenElement to see if any elements are in full screen. If an element is in full-screen mode, the element is returned, otherwise msFullscreenElement returns null.


I slightly changed Alex W's code to make events fire on fullscreen exits only. Tested in Firefox 53.0, Chrome 48.0, and Chromium 53.0:

if (document.addEventListener)
{
 document.addEventListener('fullscreenchange', exitHandler, false);
 document.addEventListener('mozfullscreenchange', exitHandler, false);
 document.addEventListener('MSFullscreenChange', exitHandler, false);
 document.addEventListener('webkitfullscreenchange', exitHandler, false);
}

function exitHandler()
{
 if (document.webkitIsFullScreen === false)
 {
  ///fire your event
 }
 else if (document.mozFullScreen === false)
 {
  ///fire your event
 }
 else if (document.msFullscreenElement === false)
 {
  ///fire your event
 }
}  

What you need to know about Full screen API, It's a way to check whether we're in full screen mode or not. let your users know that they can press the Esc key (or F11 ) to exit fullscreen mode. In addition, navigating to another page, changing tabs, or switching to another  You'll want to be sure to let your users know that they can press the Esc key (or F11) to exit fullscreen mode. In addition, navigating to another page, changing tabs, or switching to another application (using, for example, Alt-Tab) while in fullscreen mode exits fullscreen mode as well. Example. In this example, a video is presented in a web page.


Going full screen with vanilla JS, exitFullscreen() method exits full screen mode (it's always called on the to make an element (or entire web page) toggle into full screen mode when a fullscreenElement to check if something is already in full screen mode. To preserve full screen mode when a user restarts the app, set PreferredLaunchWindowingMode to FullScreen if the call to TryEnterFullScreenMode returns true. When you call ExitFullScreenMode , you should set PreferredLaunchWindowingMode back to Auto or PreferredLaunchViewSize .


Detecting HTML5 Video Fullscreen On and Off Events, Here's some code that demonstrates how to respond to the fullscreen event of an HTML5 video player. The question I was searching for was how to know if  Mozilla MDN page m'a fait allusion à l'utilisation de fscreen comme une approche de vendeur-agnostique aux API fullscreen. Malheureusement, même à cette même date (2018-02-06), ces API ne sont pas entièrement normalisées; Firefox ne dispose pas des API non ajustées activées par défaut.


Let Your Content Do the Talking: Fullscreen API, Intro to the Full Screen API. allows web apps to programmatically tell any content on the page to enter the browser's fullscreen viewing mode, from JavaScript. Helper class to detect the display mode of the current windows. I didn’t want to provide a single line of code as an answer, so instead I developed a small library to not only detect if the window is maximized but also all other modes: Windowed; Maximized; FullScreen (Win+Shift+Enter)