https://milanairports.com/themes/custom/seagroup/js/node_modules/scrollToggle.js/scrollToggle.js?v=ersion

1(function ( $ ) {
2
3  $.fn.scrollToggle = function(options) {
4
5    // Default options
6    var settings = $.extend({
7      delta: 5,
8      timeout: 250,
9      class_invisible: 'invisible',
10      class_visible: 'visible'
11    }, options);
12
13    function scroll_toggle(element_to_toggle) {
14      var did_scroll;
15      var last_scroll_top = 0;
16      var delta = settings.delta;
17      var element_height = element_to_toggle.outerHeight();
18
19      $(window).scroll(function(event){
20        did_scroll = true;
21      });
22
23      setInterval(function() {
24        if (did_scroll) {
25          last_scroll_top = has_scrolled(element_to_toggle, element_height, last_scroll_top, delta);
26          did_scroll = false;
27        }
28      }, settings.timeout);
29    }
30
31    function has_scrolled(element_to_toggle, element_height, last_scroll_top, delta) {
32      var scroll_top = $(this).scrollTop();
33
34      if(Math.abs(last_scroll_top - scroll_top) <= delta) {
35        return;
36      }
37
38      if (scroll_top > last_scroll_top && scroll_top > element_height){
39        element_to_toggle.removeClass(settings.class_visible).addClass(settings.class_invisible);
40        element_to_toggle.trigger('scrollToggle', [false]);
41      } else {
42        if(scroll_top + $(window).height() < $(document).height()) {
43          element_to_toggle.removeClass(settings.class_invisible).addClass(settings.class_visible);
44          element_to_toggle.trigger('scrollToggle', [true]);
45        }
46      }
47
48      return scroll_top;
49    }
50
51    return this.each(function() {
52      scroll_toggle($(this));
53    });
54  };
55
56}( jQuery ));
57