DocumentexitFullscreen

The document.exitFullscreen() method is a JavaScript function used to exit the full-screen mode of an HTML element. When an element is in full-screen mode, it typically occupies the entire browser window, obscuring other content. Calling this method will revert the display back to its normal windowed state.

This method is part of the Fullscreen API, which allows web pages to request full-screen display for certain elements. The document.exitFullscreen() method is the counterpart to methods like element.requestFullscreen(), which initiate full-screen mode.

To use document.exitFullscreen(), you simply call it on the document object. For example, in response to a user action like clicking a "close full-screen" button, you might have code like:

document.exitFullscreen();

It's important to note that this method will only work if the current document is actually in full-screen mode. If it's not, calling the method will have no effect. Browsers typically provide visual cues or keyboard shortcuts (like the Escape key) to exit full-screen mode as well, but the JavaScript method offers programmatic control. Error handling might be necessary if the browser doesn't support the Fullscreen API or if there are other issues preventing the exit from full-screen.