Animations doesn't work on iOS

Hi
I have a project and I have implemented an animations code - which works in the browser - after some search I found that the animations are not supported in iOS yet , is there any solution ?
here is my code :

 fade(element) {
    var op = 1;  // initial opacity
    var timer = setInterval(function () {
        if (op <= 0.1){
            clearInterval(timer);
            element.style.display = 'none';
            document.getElementById("login").style.display="block";
        }
        element.style.opacity = op;
        element.style.filter = 'alpha(opacity=' + op * 100 + ")";
        op -= op * 0.1;
    }, 30);
}

problem solved , I did a lot of things and I don’t know which one worked !