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requestAnimationFrame polyfill
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// requestAnimationFrame polyfill by Erik Möller
// fixes from Paul Irish and Tino Zijdel
(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.cancelAnimationFrame) //current Chrome (16) supports request but not cancel
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);
};
}());
@geddski
Owner

line 16 fixes issue with Chrome 16 not supporting the cancelAnimationFrame

@paulirish

Whatchu talkin about.. Chrome 16 has webkitCancelRequestAnimationFrame

@paulirish

http://jsfiddle.net/XQpzU/2117/show/ and run webkitCancelRequestAnimationFrame(rid) in console.

@geddski
Owner

What the junk, you're right. I swear I tested it and double checked my spelling. My bad. Deleting this gist.
/facepalm

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