utils.js

"use strict";

Object.defineProperty(exports, "__esModule", {
	value: true
});
var requestAnimFrame = function () {
	return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function ( /* function */callback, /* DOMElement */element) {
		window.setTimeout(callback, 1000 / 60);
	};
}();

var requestTimeout = exports.requestTimeout = function requestTimeout(fn, delay) {
	if (!window.requestAnimationFrame && !window.webkitRequestAnimationFrame && !(window.mozRequestAnimationFrame && window.mozCancelRequestAnimationFrame) && // Firefox 5 ships without cancel support
	!window.oRequestAnimationFrame && !window.msRequestAnimationFrame) 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
 */
var clearRequestTimeout = exports.clearRequestTimeout = function clearRequestTimeout(handle) {
	window.cancelAnimationFrame ? window.cancelAnimationFrame(handle.value) : window.webkitCancelAnimationFrame ? window.webkitCancelAnimationFrame(handle.value) : window.webkitCancelRequestAnimationFrame ? window.webkitCancelRequestAnimationFrame(handle.value) : /* Support for legacy API */
	window.mozCancelRequestAnimationFrame ? window.mozCancelRequestAnimationFrame(handle.value) : window.oCancelRequestAnimationFrame ? window.oCancelRequestAnimationFrame(handle.value) : window.msCancelRequestAnimationFrame ? window.msCancelRequestAnimationFrame(handle.value) : clearTimeout(handle);
};