https://www.eafit.edu.co/sites/default/files/cohesion/scripts/parallax_scrolling/init.paroller.js?tlu5vh

1(function($, Drupal, once, drupalSettings){
2  "use strict";
3
4  Drupal.behaviors.DX8ParallaxScrolling = {
5
6    attach: function (context, settings){
7
8      var cmm = new Drupal.CohesionResponsiveBreakpoints();
9
10      var resetCSS = {
11        'background': '',
12        'transform': '',
13        'transition': '',
14        'will-change': '',
15        'background-position-y': '',
16        'background-position-x': ''
17      };
18
19      var count = 0;
20      var total = 0;
21
22      function initParoller(settings) {
23
24        var key = settings.cohesion.key,
25          settings = settings.cohesion.settings,
26          $el = settings.$el;
27
28        if(!count) {
29          total = $('[data-coh-paroller]', context).length;
30          count = total;
31        }
32
33        if(count === total) {
34          //Ensure that unbind only happens the first time we loop round the elements.
35          $(window).off('.paroller');
36        }
37
38        count--;
39
40        // Always wipe the CSS when changing between breakpoints
41        $el.css(resetCSS);
42
43        if(settings.breakpoints[key].enabled){
44
45          // Init the paroller elements
46          $el.paroller({
47            factor: settings.breakpoints[key].factor,
48            direction: settings.breakpoints[key].direction,
49            type: settings.breakpoints[key].type,
50            bgstart: settings.breakpoints[key].bgstart
51          });
52        }
53      }
54

55      $(once('dx8-js-parallax-init', '[data-coh-paroller]', context)).each(function(){
56        var $el = $(this);
57        var responsiveSettings = $el.data('coh-paroller');
58        var key, previous;
59        var settings = {
60          $el: $el,
61          breakpoints: {}
62        };
63
64        for (var i = 0; i < cmm.breakpoints.length; i++) {
65
66          key = cmm.breakpoints[i].key;
67
68          // Populate all breakpoints regardless of whether the settings are set or not to simulate inheritance
69          settings.breakpoints[key] = {};
70          if (typeof responsiveSettings[key] !== 'undefined') {
71
72            settings.breakpoints[key] = responsiveSettings[key];
73
74            previous = responsiveSettings[key];
75
76          } else {
77
78            if (typeof cmm.breakpoints[i - 1] !== 'undefined' && typeof previous !== 'undefined') {
79              settings.breakpoints[key] = previous;
80            }
81          }
82        }
83
84        cmm.addListeners(settings, initParoller);
85      });
86    }
87  };
88
89})(jQuery, Drupal, once, drupalSettings);