https://wimedical.de/wp-content/themes/wimedical/assets/js/overlay-fullscreen.js

1(function (window) {
2
3    'use strict';
4
5    function classReg(className) {
6        return new RegExp("(^|\\s+)" + className + "(\\s+|$)");
7    }
8
9    var hasClass, addClass, removeClass;
10
11    if ('classList' in document.documentElement) {
12        hasClass = function (elem, c) {
13            return elem.classList.contains(c);
14        };
15        addClass = function (elem, c) {
16            elem.classList.add(c);
17        };
18        removeClass = function (elem, c) {
19            elem.classList.remove(c);
20        };
21    } else {
22        hasClass = function (elem, c) {
23            return classReg(c).test(elem.className);
24        };
25        addClass = function (elem, c) {
26            if (!hasClass(elem, c)) {
27                elem.className = elem.className + ' ' + c;
28            }
29        };
30        removeClass = function (elem, c) {
31            elem.className = elem.className.replace(classReg(c), ' ');
32        };
33    }
34
35    function toggleClass(elem, c) {
36        var fn = hasClass(elem, c) ? removeClass : addClass;
37        fn(elem, c);
38    }
39
40    var classie = {
41        hasClass: hasClass,
42        addClass: addClass,
43        removeClass: removeClass,
44        toggleClass: toggleClass,
45        has: hasClass,
46        add: addClass,
47        remove: removeClass,
48        toggle: toggleClass
49    };
50
51    if (typeof define === 'function' && define.amd) {
52        define(classie);
53    } else {
54        window.classie = classie;
55    }
56
57})(window);
58
59(function () {
60
61    triggerBttn = $('div.site-burger--items'),
62        overlay = document.querySelector('div.overlay'),
63        closeBttn = overlay.querySelector('div.menu-item--close');
64
65
66    function toggleOverlay() {
67        if (classie.has(overlay, 'open')) {
68            classie.remove(overlay, 'open');
69            classie.remove(container, 'overlay-open');
70            classie.add(overlay, 'close');
71            var onEndTransitionFn = function (ev) {
72                if (support.transitions) {
73                    if (ev.propertyName !== 'visibility') return;
74                    this.removeEventListener(transEndEventName, onEndTransitionFn);
75                }
76                classie.remove(overlay, 'close');
77            };
78            if (support.transitions) {
79                overlay.addEventListener(transEndEventName, onEndTransitionFn);
80            } else {
81                onEndTransitionFn();
82            }
83        } else if (!classie.has(overlay, 'close')) {
84            classie.add(overlay, 'open');
85            classie.add(container, 'overlay-open');
86        }
87    }
88
89    triggerBttn.on('click', toggleOverlay);
90    closeBttn.addEventListener('click', toggleOverlay);
91})();