https://www.hausvoneden.de/wp-content/themes/nikkon-child/js/new-menu.js

1$(document).ready(function() {
2    
3    $('.menu-icon').click(function() {
4        $(this).parent().toggleClass('is-tapped');
5        $('#hamburger').toggleClass('open');
6    });
7
8    // handle touch device events on drop down, first tap adds class, second navigates
9    $('.touch .sitenavigation li.nav-dropdown > a').on('touchend',
10        function(e) {
11            if ($('.menu-icon').is(':hidden')) {
12                var parent = $(this).parent();
13                $(this).find('.clicked').removeClass('clicked');
14                if (parent.hasClass('clicked')) {
15                    window.location.href = $(this).attr('href');
16                } else {
17                    $(this).addClass('linkclicked');
18
19                    // close other open menus at this level
20                    $(this).parent().parent().find('.clicked').removeClass('clicked');
21
22                    parent.addClass('clicked');
23                    e.preventDefault();
24                }
25            }
26        });
27
28    // handle the expansion of mobile menu drop down nesting
29    $('.sitenavigation li.nav-dropdown').click(
30        function(event) {
31            if (event.stopPropagation) {
32                event.stopPropagation();
33            } else {
34                event.cancelBubble = true;
35            }
36
37            if ($('.menu-icon').is(':visible')) {
38                $(this).find('> ul').toggle();
39                $(this).toggleClass('expanded');
40            }
41        }
42    );
43
44    // prevent links for propagating click/tap events that may trigger hiding/unhiding
45    $('.sitenavigation a.nav-dropdown, .sitenavigation li.nav-dropdown a').click(
46        function(event) {
47            if (event.stopPropagation) {
48                event.stopPropagation();
49            } else {
50                event.cancelBubble = true;
51            }
52        }
53    );
54
55    // javascript fade in and out of dropdown menu
56    $('.no-touch .sitenavigation li').hover(
57        function() {
58            if (!$('.menu-icon').is(':visible')) {
59                $(this).find('> ul').fadeIn(100);
60            }
61        },
62        function() {
63            if (!$('.menu-icon').is(':visible')) {
64                $(this).find('> ul').fadeOut(100);
65            }
66        }
67    );
68});