https://e123.hk/themes/contrib/bootstrap/js/base.js?v=10.5.4

1/**
2 * @file
3 * Global utilities.
4 *
5 */
6(function (Drupal) {
7  'use strict';
8
9  Drupal.behaviors.bootstrap = {
10    attach: function (context, settings) {
11      var position = window.scrollY;
12      window.addEventListener('scroll', function () {
13        if (window.scrollY > 50) {
14          document.querySelector('body').classList.add('scrolled');
15        } else {
16          document.querySelector('body').classList.remove('scrolled');
17        }
18        var scroll = window.scrollY;
19        if (scroll > position) {
20          document.querySelector('body').classList.add('scrolldown');
21          document.querySelector('body').classList.remove('scrollup');
22        } else {
23          document.querySelector('body').classList.add('scrollup');
24          document
25            .querySelector('body')
26            .classList.remove('scrolldown');
27        }
28        position = scroll;
29      });
30
31      document.addEventListener(
32        'click',
33        function (event) {
34          // If the clicked element doesn't have the right selector, bail
35          if (
36            !event.target.matches('.dropdown-item a.dropdown-toggle')
37          )
38            return;
39
40          // Don't follow the link
41          event.preventDefault();
42
43          toggle(event.target.next('ul'));
44          event.stopPropagation();
45        },
46        false
47      );
48
49      // Toggle element visibility
50      var toggle = function (elem) {
51        // If the element is visible, hide it
52        if (window.getComputedStyle(elem).display === 'block') {
53          hide(elem);
54          return;
55        }
56
57        // Otherwise, show it
58        show(elem);
59      };
60
61      var show = function (elem) {
62        elem.style.display = 'block';
63      };
64
65      var hide = function (elem) {
66        elem.style.display = 'none';
67      };
68    },
69  };
70})(Drupal);