The Document method exitFullscreen() requests that the element on this document which is currently being presented in fullscreen mode be taken out of fullscreen mode, restoring the previous state of the screen. This usually reverses the effects of a previous call to Element.requestFullscreen().

None.

A Promise which is resolved once the user agent has finished exiting fullscreen mode. If an error occurs while attempting to exit fullscreen mode, the catch() handler for the promise is called.

This example causes the current document to toggle in and out of a fullscreen presentation whenever the mouse button is clicked within it.

document.onclick = (event) => {
  if (document.fullscreenElement) {
    document
      .exitFullscreen()
      .then(() => console.log("Document Exited from Full screen mode"))
      .catch((err) => console.error(err));
  } else {
    document.documentElement.requestFullscreen();
  }
};

• Fullscreen API
• Guide to the Fullscreen API
• Element.requestFullscreen()
• Document.fullscreenElement
• :fullscreen and ::backdrop
• The <iframe> allowfullscreen attribute