https://www.apli.com/themes/contrib/bootstrap_barrio/js/global.js?v=8.9.10

1/**
2 * @file
3 * Global utilities.
4 *
5 */
6(function ($, Drupal) {
7
8  'use strict';
9
10  Drupal.behaviors.bootstrap_barrio = {
11    attach: function (context, settings) {
12
13      var position = $(window).scrollTop();
14	    $(window).scroll(function() {
15        if ($(this).scrollTop() > 50){  
16          $('body').addClass("scrolled");
17        }
18        else{
19          $('body').removeClass("scrolled");
20        }
21        var scroll = $(window).scrollTop();
22        if (scroll > position) {
23          $('body').addClass("scrolldown");
24          $('body').removeClass("scrollup");
25        } else {
26          $('body').addClass("scrollup");
27          $('body').removeClass("scrolldown");
28        }
29        position = scroll;
30      });
31
32      var toggleAffix = function(affixElement, scrollElement, wrapper) {
33        var height = affixElement.outerHeight(),
34            top = wrapper.offset().top;
35        if (scrollElement.scrollTop() >= top){
36            wrapper.height(height);
37            affixElement.addClass("affix");
38        }
39        else {
40            affixElement.removeClass("affix");
41            wrapper.height('auto');
42        }
43      };
44      $('[data-toggle="affix"]').each(function() {
45        var ele = $(this),
46          wrapper = $('<div></div>');
47        ele.before(wrapper);
48        $(window).on('scroll resize', function() {
49          toggleAffix(ele, $(this), wrapper);
50        });
51        // init
52        toggleAffix(ele, $(window), wrapper);
53      });
54    }
55  };
56
57})(jQuery, Drupal);