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Drop in replacements for setTimeout()/setInterval() that makes use of requestAnimationFrame() where possible for better performance
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| window.requestAnimFrame = (function() { | |
| return window.requestAnimationFrame || | |
| function(/* function */ callback, /* DOMElement */ element){ | |
| window.setTimeout(callback, 1000 / 60); | |
| }; | |
| })(); |
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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) return window.setInterval(fn, delay); | |
| var start = new Date().getTime(), | |
| handle = new Object(); | |
| function loop() { | |
| var current = new Date().getTime(), | |
| delta = current - start; | |
| if(delta >= delay) { | |
| fn.call(); | |
| start = new Date().getTime(); | |
| } | |
| handle.value = requestAnimFrame(loop); | |
| }; | |
| handle.value = requestAnimFrame(loop); | |
| return handle; | |
| } | |
| /** | |
| * Behaves the same as clearInterval except uses cancelRequestAnimationFrame() where possible for better performance | |
| * @param {int|object} fn The callback function | |
| */ | |
| window.clearRequestInterval = function(handle) { | |
| window.cancelAnimationFrame ? window.cancelAnimationFrame(handle.value) : clearInterval(handle); | |
| }; |
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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 ) return window.setTimeout(fn, delay); | |
| var start = new Date().getTime(), | |
| handle = new Object(); | |
| function loop(){ | |
| var current = new Date().getTime(), | |
| delta = current - start; | |
| delta >= delay ? fn.call() : handle.value = requestAnimFrame(loop); | |
| }; | |
| handle.value = requestAnimFrame(loop); | |
| return handle; | |
| }; | |
| /** | |
| * Behaves the same as clearTimeout except uses cancelRequestAnimationFrame() where possible for better performance | |
| * @param {int|object} fn The callback function | |
| */ | |
| window.clearRequestTimeout = function(handle) { | |
| window.cancelAnimationFrame ? window.cancelAnimationFrame(handle.value) : clearTimeout(handle); | |
| }; |
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