35 lines
656 B
JavaScript
35 lines
656 B
JavaScript
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/**
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* Expose `requestAnimationFrame()`.
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*/
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exports = module.exports = window.requestAnimationFrame
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|| window.webkitRequestAnimationFrame
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|| window.mozRequestAnimationFrame
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|| fallback;
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/**
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* Fallback implementation.
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*/
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var prev = new Date().getTime();
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function fallback(fn) {
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var curr = new Date().getTime();
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var ms = Math.max(0, 16 - (curr - prev));
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var req = setTimeout(fn, ms);
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prev = curr;
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return req;
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}
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/**
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* Cancel.
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*/
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var cancel = window.cancelAnimationFrame
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|| window.webkitCancelAnimationFrame
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|| window.mozCancelAnimationFrame
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|| window.clearTimeout;
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exports.cancel = function(id){
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cancel.call(window, id);
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};
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