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function generateRandomID() {
	return Math.floor(Math.random() * 9e99).toString(36);
}

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// From http://paulbrowne.fi/2015/01/31/background-image-properties-inline-images

<div class="icovr">
	<img href="some-image.jpg" alt="" >
</div>
<script>
function imgcover(){

	// target all images in this container

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function isArray(myArray) {
	return myArray.constructor.toString().indexOf("Array") > -1;
}

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// found at http://ejohn.org/blog/asmjs-javascript-compile-target/
let integer_variable = float_variable | 0;

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const urlpathKey = window.location.pathname.replace(/^\//, '').split('/').shift();

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/**
 * @param   {Element}     el
 * @param   {string}      selector
 * @return  {Element[]}
 */

h.children = function(el, selector) {
    var selectors      = null,
        children       = null,
        childSelectors = [],

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/**
 * @param   {Element}       el
 * @param   {string}        selector
 * @param   {boolean}       [includeSelf]
 * @return  {Element|null}
 */


const closestParent = function(el, selector, includeSelf) {

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/**
 * @param   {Element}   el
 * @param   {string}    [selector]
 * @return  {number}
 */

h.index = function(el, selector) {
    var i = 0;

    while ((el = el.previousElementSibling) !== null) {

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// From http://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
    // Opera 8.0+
var isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
    // Firefox 1.0+
var isFirefox = typeof InstallTrigger !== 'undefined';
    // At least Safari 3+: "[object HTMLElementConstructor]"
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
    // Internet Explorer 6-11
var isIE = /*@cc_on!@*/false || !!document.documentMode;
    // Edge 20+

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const documentHeight = function() {

	var body = document.body,
		html = document.documentElement,
		height = Math.max( body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight )
	;

	return height;

}