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RAF replacements for setTimeout and setInterval
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| Drop in replace functions for setTimeout() & setInterval() that | |
| make use of requestAnimationFrame() for performance where available | |
| http://www.joelambert.co.uk | |
| Copyright 2011, Joe Lambert. All rights reserved | |
| Free to use under the MIT license. | |
| http://www.opensource.org/licenses/mit-license.php |
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| // requestAnimationFrame() shim by Paul Irish | |
| // http://paulirish.com/2011/requestanimationframe-for-smart-animating/ | |
| window.requestAnimFrame = (function() { | |
| return window.requestAnimationFrame || | |
| window.webkitRequestAnimationFrame || | |
| window.mozRequestAnimationFrame || | |
| window.oRequestAnimationFrame || | |
| window.msRequestAnimationFrame || | |
| function(/* function */ callback, /* DOMElement */ element){ | |
| window.setTimeout(callback, 1000 / 60); | |
| }; | |
| })(); |
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| /** | |
| * Behaves the same as setTimeout except uses requestAnimationFrame() where possible for better performance | |
| * @param {function} fn The callback function | |
| * @param {int} delay The delay in milliseconds | |
| */ | |
| window.requestTimeout = function(fn, delay) { | |
| if( !window.requestAnimationFrame && | |
| !window.webkitRequestAnimationFrame && | |
| !window.mozRequestAnimationFrame && | |
| !window.oRequestAnimationFrame && | |
| !window.msRequestAnimationFrame) | |
| return window.setTimeout(fn, delay); | |
| var start = new Date().getTime(); | |
| (function loop(){ | |
| var current = new Date().getTime(), | |
| delta = current - start; | |
| delta >= delay ? fn.call() : requestAnimFrame(loop); | |
| })(); | |
| }; |
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| /** | |
| * Behaves the same as setInterval except uses requestAnimationFrame() where possible for better performance | |
| * @param {function} fn The callback function | |
| * @param {int} delay The delay in milliseconds | |
| */ | |
| window.requestInterval = function(fn, delay) { | |
| if( !window.requestAnimationFrame && | |
| !window.webkitRequestAnimationFrame && | |
| !window.mozRequestAnimationFrame && | |
| !window.oRequestAnimationFrame && | |
| !window.msRequestAnimationFrame) | |
| return window.setInterval(fn, delay); | |
| var start = new Date().getTime(); | |
| (function loop() { | |
| var current = new Date().getTime(), | |
| delta = current - start; | |
| if(delta >= delay) { | |
| fn.call(); | |
| start = new Date().getTime(); | |
| } | |
| requestAnimFrame(loop); | |
| })(); | |
| }; |
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