Web/API/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

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`fullScreen` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 3	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 4	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.

Window.fullScreen by Mozilla Contributors is licensed under CC-BY-SA 2.5.