https://mkufa.ru/themes/sobkor02/js/bootstrap-hover-dropdown.js

1/*
2 * Project: Twitter Bootstrap Hover Dropdown
3 * Author: Cameron Spear
4 * Contributors: Mattia Larentis
5 *
6 * Dependencies: Bootstrap's Dropdown plugin, jQuery
7 *
8 * A simple plugin to enable Bootstrap dropdowns to active on hover and provide a nice user experience.
9 *
10 * License: MIT
11 *
12 * http://cameronspear.com/blog/twitter-bootstrap-dropdown-on-hover-plugin/
13 */
14;(function($, window, undefined) {
15    // outside the scope of the jQuery plugin to
16    // keep track of all dropdowns
17    var $allDropdowns = $();
18
19    // if instantlyCloseOthers is true, then it will instantly
20    // shut other nav items when a new one is hovered over
21    $.fn.dropdownHover = function(options) {
22
23        // the element we really care about
24        // is the dropdown-toggle's parent
25        $allDropdowns = $allDropdowns.add(this.parent());
26
27        return this.each(function() {
28            var $this = $(this),
29                $parent = $this.parent(),
30                defaults = {
31                    delay: 300,
32                    instantlyCloseOthers: true
33                },
34                data = {
35                    delay: $(this).data('delay'),
36                    instantlyCloseOthers: $(this).data('close-others')
37                },
38                settings = $.extend(true, {}, defaults, options, data),
39                timeout;
40
41            $parent.hover(function(event) {
42                // so a neighbor can't open the dropdown
43                if(!$parent.hasClass('open') && !$this.is(event.target)) {
44                    return true;
45                }
46
47                if(settings.instantlyCloseOthers === true)
48                    $allDropdowns.removeClass('open');
49
50                window.clearTimeout(timeout);
51                $parent.addClass('open');
52            }, function() {
53                timeout = window.setTimeout(function() {
54                    $parent.removeClass('open');
55                }, settings.delay);
56            });
57
58            // this helps with button groups!
59            $this.hover(function() {
60                if(settings.instantlyCloseOthers === true)
61                    $allDropdowns.removeClass('open');
62
63                window.clearTimeout(timeout);
64                $parent.addClass('open');
65            });
66
67            // handle submenus
68            $parent.find('.dropdown-submenu').each(function(){
69                var $this = $(this);
70                var subTimeout;
71                $this.hover(function() {
72                    window.clearTimeout(subTimeout);
73                    $this.children('.dropdown-menu').show();
74                    // always close submenu siblings instantly
75                    $this.siblings().children('.dropdown-menu').hide();
76                }, function() {
77                    var $submenu = $this.children('.dropdown-menu');
78                    subTimeout = window.setTimeout(function() {
79                        $submenu.hide();
80                    }, settings.delay);
81                });
82            });
83        });
84    };
85
86    $(document).ready(function() {
87        // apply dropdownHover to all elements with the data-hover="dropdown" attribute
88        $('[data-hover="dropdown"]').dropdownHover();
89    });
90})(jQuery, this);