cubiq/iscroll — Issue #171: Change requestAnimationFrame to new polyfill
Author: matthewdl
Created: 2012-01-14 00:25:12+00:00
State: open

There's now a new polyfill for requestAnimationFrame developed by Paul Irish and others here:

http://paulirish.com/2011/requestanimationframe-for-smart-animating/

Code:

```
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame =
window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'RequestCancelAnimationFrame'];
}

if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};

if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}());
```