JavaScript window.fullScreen Property

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JavaScript window.fullScreen Property

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

Note: This property is read-only.


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<!DOCTYPE html> <html> <body onkeyup="myFunction()"> <p>Works only on Firefox</p> <p id="point"></p> <script> var x = document.getElementById("point"); function myFunction(){ if(window.fullScreen == undefined) x.innerHTML = "window.fullScreen is not supported in your browser"; else if(window.fullScreen) x.innerHTML = "Window is in Fullscreen"; else x.innerHTML = "Window is not in Fullscreen"; } myFunction(); </script> </body> </html>



Return Values

trueThe window is in full screen mode.
falseThe window is not in full screen mode.


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