request-animation-frame

1    var id = window.requestAnimationFrame(f);
2    window.cancelAnimationFrame(id);

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

MIT license