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The Document.fullscreenElement read-only property returns the Element that is currently being presented in full-screen mode in this document, or null if full-screen mode is not currently in use.
Although this property is read-only, it will not throw if it is modified (even in strict mode); the setter is a no-operation and it will be ignored.
Syntax
var element = document.fullscreenElement;
On return, element is the element that is currently in full-screen mode, or null if full-screen mode isn't currently in use by the document.
Example
function isVideoInFullsreen() {
if (document.fullscreenElement && document.fullscreenElement.nodeName == 'VIDEO') {
console.log('Your video is playing in fullscreen');
}
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| Fullscreen API The definition of 'Document.fullscreenElement' in that specification. |
Living Standard | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | 9.0 (9.0)[1] 47.0 (47.0)[2] |
? | ? | ? |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | ? | 9.0 (9.0)[1] 47.0 (47.0)[2] |
? | ? | ? |
[1] Implemented as mozFullScreenElement.
[2] Gecko 47.0 (Firefox 47.0 / Thunderbird 47.0 / SeaMonkey 2.44) implemented this API behind the preference full-screen-api.unprefix.enabled, defaulting to false.