adobe animate canvas > "requestfullscreen" don't work on iphone...

I have a problem with "requestfullscreen" on iphone.

https://clientes.or-design.org/testSwipe/

_root.FullScreenBT.addEventListener("click", f);
var element = document.getElementById("animation_container");
function f(){
	element.requestFullscreen()
	.then(function() {_root.FullScreenBT.alpha=0;})
	.catch(function(error) {console.log(error.message);});
}

¿Any idea?