foolip/nestfs.html

## nestfs.html
<!DOCTYPE html>
<div>
  <button>enter once</button>
  <div>
    <button>enter twice</button>
    <div>
      <button>remove</button>
    </div>
  </div>
</div>
<script>
  document.addEventListener('click', function(event) {
    if (event.target.localName != 'button')
      return;
    if (event.target.textContent.startsWith('enter')) {
      try {
        event.target.nextElementSibling.requestFullscreen();
      } catch(e) {
        event.target.nextElementSibling.webkitRequestFullscreen();
      }
    } else {
      console.log(document.fullscreenElement);
      try {
        document.fullscreenElement.remove();
      } catch(e) {
        document.webkitFullscreenElement.remove();
      }
      console.log(document.fullscreenElement);
    }
  });
</script>
	<!DOCTYPE html>
	<div>
	<button>enter once</button>
	<div>
	<button>enter twice</button>
	<div>
	<button>remove</button>
	</div>
	</div>
	</div>
	<script>
	document.addEventListener('click', function(event) {
	if (event.target.localName != 'button')
	return;
	if (event.target.textContent.startsWith('enter')) {
	try {
	event.target.nextElementSibling.requestFullscreen();
	} catch(e) {
	event.target.nextElementSibling.webkitRequestFullscreen();
	}
	} else {
	console.log(document.fullscreenElement);
	try {
	document.fullscreenElement.remove();
	} catch(e) {
	document.webkitFullscreenElement.remove();
	}
	console.log(document.fullscreenElement);
	}
	});
	</script>