Angular PWA App not working Javascript requestFullscreen() for IOS Device only

Question

In Angular PWA App, I have to make div toggle for Full screen and Exit Full Screen.

For this, I have used :

if (element.requestFullscreen) {
      element.requestFullscreen();
    } else if (element.msRequestFullscreen) {
      element.msRequestFullscreen();
    } else if (element.mozRequestFullScreen) {
      element.mozRequestFullScreen();
    } else if (element.webkitRequestFullscreen) {
      element.webkitRequestFullscreen();
    }

But this is not working as App mode in IOS Device. Any Idea?