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@getify
Created June 27, 2012 14:19
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requestNextAnimationFrame() and cancelNextAnimationFrame()
// requires raf.js (polyfil)
(function(){
var ids = {};
function requestId(){
var id;
do {
id = Math.floor(Math.random() * 1E9);
} while (id in ids);
return id;
}
if (!window.requestNextAnimationFrame) {
window.requestNextAnimationFrame = function(callback, element) {
var id = requestId();
ids[id] = requestAnimationFrame(function(){
ids[id] = requestAnimationFrame(function(ts){
delete ids[id];
callback(ts);
},element);
},element);
return id;
};
}
if (!window.cancelNextAnimationFrame) {
window.cancelNextAnimationFrame = function(id) {
if (ids[id]) {
cancelAnimationFrame(ids[id]);
delete ids[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
(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]+'CancelRequestAnimationFrame'];
}
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);
};
}
})();
@getify
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getify commented Jul 2, 2012

updated "naf.js" with a few tweaks as suggested by @miksago's fork

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