51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
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define([
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'./defined'
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], function(
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defined) {
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'use strict';
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if (typeof window === 'undefined') {
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return;
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}
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var implementation = window.cancelAnimationFrame;
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(function() {
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// look for vendor prefixed function
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if (!defined(implementation)) {
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var vendors = ['webkit', 'moz', 'ms', 'o'];
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var i = 0;
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var len = vendors.length;
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while (i < len && !defined(implementation)) {
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implementation = window[vendors[i] + 'CancelAnimationFrame'];
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if (!defined(implementation)) {
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implementation = window[vendors[i] + 'CancelRequestAnimationFrame'];
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}
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++i;
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}
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}
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// otherwise, assume requestAnimationFrame is based on setTimeout, so use clearTimeout
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if (!defined(implementation)) {
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implementation = clearTimeout;
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}
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})();
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/**
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* A browser-independent function to cancel an animation frame requested using {@link requestAnimationFrame}.
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*
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* @exports cancelAnimationFrame
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*
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* @param {Number} requestID The value returned by {@link requestAnimationFrame}.
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*
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* @see {@link http://www.w3.org/TR/animation-timing/#the-WindowAnimationTiming-interface|The WindowAnimationTiming interface}
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*/
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function cancelAnimationFrame(requestID) {
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// we need this extra wrapper function because the native cancelAnimationFrame
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// functions must be invoked on the global scope (window), which is not the case
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// if invoked as Cesium.cancelAnimationFrame(requestID)
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implementation(requestID);
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}
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return cancelAnimationFrame;
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});
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