On iPhone devices, the webkitEnterFullscreen() method does not allow triggering full screen mode on non-video elements. The method works as expected on iPad devices and on desktop Safari. Apple documentation: https://developer.apple.com/documentation/webkitjs/htmlvideoelement/1633500-webkitenterfullscreen MDN documentation for Fullscreen API (non-prefixed): https://developer.mozilla.org/en-US/docs/Web/API/Element/requestFullScreen
*** This bug has been marked as a duplicate of bug 212934 ***