Document.onfullscreenchange

The Document interface's onfullscreenchange property is an event handler for the fullscreenchange event that is fired immediately before a document transitions into or out of full-screen mode.

Syntax

targetDocument.onfullscreenchange = fullscreenChangeHandler;

Value

An event handler which is invoked whenever the document receives a fullscreenchange event, indicating that the document is transitioning into or out of full-screen mode.

Usage notes

The fullscreenchange event does not directly specify whether the transition is into or out of full-screen mode, so your event handler should look at the value of Document.fullscreenElement. If it's null, the event indicates a transition out of full-screen mode. Otherwise, the specified element is about to take over the screen.

Example

document.onfullscreenchange = function ( event ) {
  console.log("FULL SCREEN CHANGE")
};
document.documentElement.onclick = function () {
  // requestFullscreen() must be in an event handler or it will fail
  document.documentElement.requestFullscreen();
}

Specifications

Browser compatibility

See also

• Fullscreen API
• Guide to the Fullscreen API
• fullscreenchange
• Document.onfullscreenerror