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56 lines
1.6 KiB
56 lines
1.6 KiB
3 years ago
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/**
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* Copyright 2012-2016, Plotly, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// This code adapted from:
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//
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// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
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// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
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// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
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// MIT license
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(function(){
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'use strict';
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if(!Date.now) {
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Date.now = function() { return (new Date()).getTime(); };
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}
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var vendors = ['webkit', 'moz'];
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var i = 0;
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var l = vendors.length;
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var vp;
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var lastTime = 0;
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for(; i < l && !window.requestAnimationFrame; ++i) {
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vp = vendors[i];
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window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
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window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
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window[vp + 'CancelRequestAnimationFrame']);
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}
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if(/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || // iOS6 is buggy
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!window.requestAnimationFrame || !window.cancelAnimationFrame) {
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window.requestAnimationFrame = function(callback) {
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var now = Date.now();
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var nextTime = Math.max(lastTime + 16, now);
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return setTimeout(function() { callback(lastTime = nextTime); },
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nextTime - now);
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};
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window.cancelAnimationFrame = clearTimeout;
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}
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vendors = null;
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i = null;
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l = null;
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vp = null;
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}());
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