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requestAnimationFrame polyfill
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// 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); | |
}; | |
}()); |
Whatchu talkin about.. Chrome 16 has webkitCancelRequestAnimationFrame
http://jsfiddle.net/XQpzU/2117/show/ and run webkitCancelRequestAnimationFrame(rid)
in console.
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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line 16 fixes issue with Chrome 16 not supporting the cancelAnimationFrame