https://www.comodo.it/blog/wp-content/themes/comodo/assets/js/svgxuse.js?ver=d4a899b51dd9b5f4d9811369ecab96db

1/*!
2 * @copyright Copyright (c) 2016 IcoMoon.io
3 * @license   Licensed under MIT license
4 *            See https://github.com/Keyamoon/svgxuse
5 * @version   1.1.23
6 */
7/*jslint browser: true */
8/*global XDomainRequest, MutationObserver, window */
9(function () {
10    'use strict';
11    if (window && window.addEventListener) {
12        var cache = Object.create(null); // holds xhr objects to prevent multiple requests
13        var checkUseElems;
14        var tid; // timeout id
15        var debouncedCheck = function () {
16            clearTimeout(tid);
17            tid = setTimeout(checkUseElems, 100);
18        };
19        var unobserveChanges = function () {
20            return;
21        };
22        var observeChanges = function () {
23            var observer;
24            window.addEventListener('resize', debouncedCheck, false);
25            window.addEventListener('orientationchange', debouncedCheck, false);
26            if (window.MutationObserver) {
27                observer = new MutationObserver(debouncedCheck);
28                observer.observe(document.documentElement, {
29                    childList: true,
30                    subtree: true,
31                    attributes: true
32                });
33                unobserveChanges = function () {
34                    try {
35                        observer.disconnect();
36                        window.removeEventListener('resize', debouncedCheck, false);
37                        window.removeEventListener('orientationchange', debouncedCheck, false);
38                    } catch (ignore) {}
39                };
40            } else {
41                document.documentElement.addEventListener('DOMSubtreeModified', debouncedCheck, false);
42                unobserveChanges = function () {
43                    document.documentElement.removeEventListener('DOMSubtreeModified', debouncedCheck, false);
44                    window.removeEventListener('resize', debouncedCheck, false);
45                    window.removeEventListener('orientationchange', debouncedCheck, false);
46                };
47            }
48        };
49        var createRequest = function (url) {
50            // In IE 9, cross origin requests can only be sent using XDomainRequest.
51            // XDomainRequest would fail if CORS headers are not set.
52            // Therefore, XDomainRequest should only be used with cross origin requests.
53            function getOrigin(loc) {
54                var a;
55                if (loc.protocol !== undefined) {
56                    a = loc;
57                } else {
58                    a = document.createElement('a');
59                    a.href = loc;
60                }
61                return a.protocol.replace(/:/g, '') + a.host;
62            }
63            var Request;
64            var origin;
65            var origin2;
66            if (window.XMLHttpRequest) {
67                Request = new XMLHttpRequest();
68                origin = getOrigin(location);
69                origin2 = getOrigin(url);
70                if (Request.withCredentials === undefined && origin2 !== '' && origin2 !== origin) {
71                    Request = XDomainRequest || undefined;
72                } else {
73                    Request = XMLHttpRequest;
74                }
75            }
76            return Request;
77        };
78        var xlinkNS = 'http://www.w3.org/1999/xlink';
79        checkUseElems = function () {
80            var base;
81            var bcr;
82            var fallback = ''; // optional fallback URL in case no base path to SVG file was given and no symbol definition was found.
83            var hash;
84            var href;
85            var i;
86            var inProgressCount = 0;
87            var isHidden;
88            var Request;
89            var url;
90            var uses;
91            var xhr;
92            function observeIfDone() {
93                // If done with making changes, start watching for chagnes in DOM again
94                inProgressCount -= 1;
95                if (inProgressCount === 0) { // if all xhrs were resolved
96                    unobserveChanges(); // make sure to remove old handlers
97                    observeChanges(); // watch for changes to DOM
98                }
99            }
100            function attrUpdateFunc(spec) {
101                return function () {
102                    if (cache[spec.base] !== true) {
103                        spec.useEl.setAttributeNS(xlinkNS, 'xlink:href', '#' + spec.hash);
104                    }
105                };
106            }
107            function onloadFunc(xhr) {
108                return function () {
109                    var body = document.body;
110                    var x = document.createElement('x');
111                    var svg;
112                    xhr.onload = null;
113                    x.innerHTML = xhr.responseText;
114                    svg = x.getElementsByTagName('svg')[0];
115                    if (svg) {
116                        svg.setAttribute('aria-hidden', 'true');
117                        svg.style.position = 'absolute';
118                        svg.style.width = 0;
119                        svg.style.height = 0;
120                        svg.style.overflow = 'hidden';
121                        body.insertBefore(svg, body.firstChild);
122                    }
123                    observeIfDone();
124                };
125            }
126            function onErrorTimeout(xhr) {
127                return function () {
128                    xhr.onerror = null;
129                    xhr.ontimeout = null;
130                    observeIfDone();
131                };
132            }
133            unobserveChanges(); // stop watching for changes to DOM
134            // find all use elements
135            uses = document.getElementsByTagName('use');
136            for (i = 0; i < uses.length; i += 1) {
137                try {
138                    bcr = uses[i].getBoundingClientRect();
139                } catch (ignore) {
140                    // failed to get bounding rectangle of the use element
141                    bcr = false;