Window.fullScreen

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The fullScreen property of the Window interface indicates whether the window is displayed in full screen mode or not.

Syntax

isInFullScreen = windowRef.fullScreen;

With chrome privileges, the property is read-write, otherwise it is read-only. Bear in mind that if you try to set this property without chrome privileges, it will not throw an exception and instead just silently fail. This is to prevent scripts designed to set this property in Internet Explorer from breaking.

Return value

isInFullScreen
A boolean. Possible Values:
  • true: The window is in full screen mode.
  • false: The window is not in full screen mode.

Notes

  • Switching between regular window and full screen will fire the "resize" event on the corresponding window.

Example

if (window.fullScreen) {
  // it's fullscreen!
}
else {
  // not fullscreen!
}

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
fullScreen
Non-standard
Chrome No support NoEdge ? Firefox Full support 3IE No support NoOpera ? Safari ? WebView Android No support NoChrome Android No support NoFirefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.