https://bfinwr.github.io/js/src/schemes/pisces.js?v=5.1.4

1$(document).ready(function () {
2
3  var sidebarInner = $('.sidebar-inner');
4
5  initAffix();
6  resizeListener();
7
8  function initAffix () {
9    var headerOffset = getHeaderOffset(),
10        footerOffset = getFooterOffset(),
11        sidebarHeight = $('#sidebar').height() + NexT.utils.getSidebarb2tHeight(),
12        contentHeight = $('#content').height();
13
14    // Not affix if sidebar taller then content (to prevent bottom jumping).
15    if (headerOffset + sidebarHeight < contentHeight) {
16      sidebarInner.affix({
17        offset: {
18          top: headerOffset - CONFIG.sidebar.offset,
19          bottom: footerOffset
20        }
21      });
22    }
23
24    setSidebarMarginTop(headerOffset).css({ 'margin-left': 'initial' });
25  }
26
27  function resizeListener () {
28    var mql = window.matchMedia('(min-width: 991px)');
29    mql.addListener(function(e){
30      if(e.matches){
31        recalculateAffixPosition();
32      }
33    });
34  }
35
36  function getHeaderOffset () {
37    return $('.header-inner').height() + CONFIG.sidebar.offset;
38  }
39
40  function getFooterOffset () {
41    var footerInner = $('.footer-inner'),
42        footerMargin = footerInner.outerHeight(true) - footerInner.outerHeight(),
43        footerOffset = footerInner.outerHeight(true) + footerMargin;
44    return footerOffset;
45  }
46
47  function setSidebarMarginTop (headerOffset) {
48    return $('#sidebar').css({ 'margin-top': headerOffset });
49  }
50
51  function recalculateAffixPosition () {
52    $(window).off('.affix');
53    sidebarInner.removeData('bs.affix').removeClass('affix affix-top affix-bottom');
54    initAffix();
55  }
56
57});