https://www.danklass.com/wp-content/themes/moesia/js/jquery.sticky.js?ver=1

1// Sticky Plugin v1.0.0 for jQuery
2// =============
3// Author: Anthony Garand
4// Improvements by German M. Bravo (Kronuz) and Ruud Kamphuis (ruudk)
5// Improvements by Leonardo C. Daronco (daronco)
6// Created: 2/14/2011
7// Date: 2/12/2012
8// Website: http://labs.anthonygarand.com/sticky
9// Description: Makes an element on the page stick on the screen as you scroll
10//       It will only set the 'top' and 'position' of your element, you
11//       might need to adjust the width in some cases.
12
13(function($) {
14$(window).bind("load", function() {
15  var defaults = {
16      topSpacing: 0,
17      bottomSpacing: 0,
18      className: 'is-sticky',
19      wrapperClassName: 'sticky-wrapper',
20      center: false,
21      getWidthFrom: '',
22      responsiveWidth: false
23    },
24    $window = $(window),
25    $document = $(document),
26    sticked = [],
27    windowHeight = $window.height(),
28    scroller = function() {
29      var scrollTop = $window.scrollTop(),
30        documentHeight = $document.height(),
31        dwh = documentHeight - windowHeight,
32        extra = (scrollTop > dwh) ? dwh - scrollTop : 0;
33
34      for (var i = 0; i < sticked.length; i++) {
35        var s = sticked[i],
36          elementTop = s.stickyWrapper.offset().top,
37          etse = elementTop - s.topSpacing - extra;
38
39        if (scrollTop <= etse) {
40          if (s.currentTop !== null) {
41            s.stickyElement
42              .css('position', '')
43              .css('top', '');
44            s.stickyElement.trigger('sticky-end', [s]).parent().removeClass(s.className);
45            s.currentTop = null;
46          }
47        }
48        else {
49          var newTop = documentHeight - s.stickyElement.outerHeight()
50            - s.topSpacing - s.bottomSpacing - scrollTop - extra;
51          if (newTop < 0) {
52            newTop = newTop + s.topSpacing;
53          } else {
54            newTop = s.topSpacing;
55          }
56          if (s.currentTop != newTop) {
57            s.stickyElement
58              .css('position', 'fixed')
59              .css('top', newTop);
60
61            if (typeof s.getWidthFrom !== 'undefined') {
62              s.stickyElement.css('width', $(s.getWidthFrom).width());
63            }
64
65            s.stickyElement.trigger('sticky-start', [s]).parent().addClass(s.className);
66            s.currentTop = newTop;
67          }
68        }
69      }
70    },
71    resizer = function() {
72      windowHeight = $window.height();
73
74      for (var i = 0; i < sticked.length; i++) {
75        var s = sticked[i];
76        if (typeof s.getWidthFrom !== 'undefined' && s.responsiveWidth === true) {
77          s.stickyElement.css('width', $(s.getWidthFrom).width());
78        }
79      }
80    },
81    methods = {
82      init: function(options) {
83        var o = $.extend({}, defaults, options);
84        return this.each(function() {
85          var stickyElement = $(this);
86
87          var stickyId = stickyElement.attr('id');
88          var wrapperId = stickyId ? stickyId + '-' + defaults.wrapperClassName : defaults.wrapperClassName 
89          var wrapper = $('<div></div>')
90            .attr('id', stickyId + '-sticky-wrapper')
91            .addClass(o.wrapperClassName);
92          stickyElement.wrapAll(wrapper);
93
94          if (o.center) {
95            stickyElement.parent().css({width:stickyElement.outerWidth(),marginLeft:"auto",marginRight:"auto"});
96          }
97
98          if (stickyElement.css("float") == "right") {
99            stickyElement.css({"float":"none"}).parent().css({"float":"right"});
100          }
101
102          var stickyWrapper = stickyElement.parent();  
103          stickyWrapper.css('height', stickyElement.outerHeight());
104          sticked.push({
105            topSpacing: o.topSpacing,
106            bottomSpacing: o.bottomSpacing,
107            stickyElement: stickyElement,
108            currentTop: null,
109            stickyWrapper: stickyWrapper,
110            className: o.className,
111            getWidthFrom: o.getWidthFrom,
112            responsiveWidth: o.responsiveWidth
113          });
114        });
115      },
116      update: scroller,
117      unstick: function(options) {
118        return this.each(function() {
119          var unstickyElement = $(this);
120
121          var removeIdx = -1;
122          for (var i = 0; i < sticked.length; i++)
123          {
124            if (sticked[i].stickyElement.get(0) == unstickyElement.get(0))
125            {
126                removeIdx = i;
127            }
128          }
129          if(removeIdx != -1)
130          {
131            sticked.splice(removeIdx,1);
132            unstickyElement.unwrap();
133            unstickyElement.removeAttr('style');
134          }
135        });
136      }
137    };
138
139  // should be more efficient than using $window.scroll(scroller) and $window.resize(resizer):
140  if (window.addEventListener) {
141    window.addEventListener('scroll', scroller, false);
142    window.addEventListener('resize', resizer, false);
143  } else if (window.attachEvent) {
144    window.attachEvent('onscroll', scroller);
145    window.attachEvent('onresize', resizer);
146  }
147
148  $.fn.sticky = function(method) {
149    if (methods[method]) {
150      return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
151    } else if (typeof method === 'object' || !method ) {
152      return methods.init.apply( this, arguments );
153    } else {
154      $.error('Method ' + method + ' does not exist on jQuery.sticky');
155    }
156  };
157
158  $.fn.unstick = function(method) {
159    if (methods[method]) {
160      return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
161    } else if (typeof method === 'object' || !method ) {
162      return methods.unstick.apply( this, arguments );
163    } else {
164      $.error('Method ' + method + ' does not exist on jQuery.sticky');
165    }
166
167  };
168  $(function() {
169    setTimeout(scroller, 0);
170
171});    
172});
173})(jQuery);