https://www.rapmaniacz.com/wp-content/themes/puzzles/js/jquery.mobilemenu.min.js

1(function ($) {
2    $.fn.mobileMenu = function (options) {
3        function isMobile() {
4            return ($('body').width() < settings.mobileWidth);
5        }
6        var defaults = {
7            defaultText: THEMEREX_NAVIGATE_TO,
8            className: 'select-menu',
9			mainMenuSelector: '#mainmenu',
10			mobileWidth: 800
11        	}, 
12			settings = $.extend(defaults, options),
13            el = $(this),
14			first = settings.defaultText;
15        this.each(function () {
16            var clonedObj = el.clone().removeClass('sf-js-enabled').removeAttr('id').addClass('theme_button');
17			el.find('a').each(function () {
18            	if($(this).text() == "") {
19            		return;
20            	}
21				if (this.href == window.location.href)
22					first = $(this).text();
23            });
24			$('<div class="' + settings.className + '">'
25				+ '<a class="' + settings.className + '-button theme_button"><span class="icon"></span>'
26				+ '<span class="holder">' + first + '</span></a>'
27				+ '</div>').append(clonedObj).insertAfter(el);
28			$('.' + settings.className + ' > ul a').addClass('theme_button');
29			$('.' + settings.className + ' > ul').hide();
30            $('.' + settings.className).on('click', '.'+settings.className+'-button', function (e) {
31				$(this).siblings('ul').slideToggle();
32				e.preventDefault();
33				return false;
34            });
35        });
36
37        function runPlugin() {
38            if (isMobile()) {
39                $('.'+settings.className).show();
40                $(settings.mainMenuSelector).hide();
41                $('body').addClass('menu_mobile');
42            } else {
43                $('.'+settings.className).hide();
44                $(settings.mainMenuSelector).show();
45                $('body').removeClass('menu_mobile');
46            }
47        }
48        runPlugin();
49        $(window).resize(function () {
50            runPlugin();
51        });
52        return this;
53    };
54})(jQuery);