Document.exitFullscreen()

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

exitPromise = document.exitFullscreen();

None.

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

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

document.onclick = function (event) {
  if (document.fullscreenElement) {
    document.exitFullscreen()
      .then(() => console.log("Document Exited form 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