https://breezendtechs.com/public/assets_frontend/plugins/heading/js/jquery.nav.min.js

1
2;
3(function($, window, document, undefined) {
4    var OnePageNav = function(elem, options) {
5        this.elem = elem;
6        this.$elem = $(elem);
7        this.options = options;
8        this.metadata = this.$elem.data('plugin-options');
9        this.$nav = this.$elem.find('a');
10        this.$win = $(window);
11        this.sections = {};
12        this.didScroll = false;
13        this.$doc = $(document);
14        this.docHeight = this.$doc.height()
15    };
16    OnePageNav.prototype = {
17        defaults: {
18            currentClass: 'current',
19            changeHash: false,
20            easing: 'swing',
21            filter: '',
22            scrollSpeed: 750,
23            scrollOffset: 0,
24            scrollThreshold: 0.5,
25            begin: false,
26            end: false,
27            scrollChange: false
28        },
29     
30        scrollChange: function() {
31            var windowTop = this.$win.scrollTop();
32            var position = this.getSection(windowTop);
33            var $parent;
34            if (position !== null) {
35                $parent = this.$elem.find('a[href$="#' + position + '"]').parent();
36                if (!$parent.hasClass(this.config.currentClass)) {
37                    this.adjustNav(this, $parent);
38                    if (this.config.scrollChange) {
39                        this.config.scrollChange($parent)
40                    }
41                }
42            }
43        },
44        unbindInterval: function() {
45            clearInterval(this.t);
46            this.$win.unbind('scroll.onePageNav')
47        }
48    };
49    OnePageNav.defaults = OnePageNav.prototype.defaults;
50    $.fn.onePageNav = function(options) {
51        return this.each(function() {
52            new OnePageNav(this, options).init()
53        })
54    }
55})(jQuery, window, document);