https://icabrasil.org/wp-content/themes/icab2023_vs1/includes/js/smooth-scroll/jQuery.scrollSpeed.js?ver=7.1.2

1// Custom scrolling speed with jQuery
2// Source: github.com/ByNathan/jQuery.scrollSpeed
3// Version: 1.0.2
4
5(function($) {
6    
7    jQuery.scrollSpeed = function(step, speed, easing) {
8        
9        var $document = $(document),
10            $window = $(window),
11            $body = $('html, body'),
12            option = easing || 'default',
13            root = 0,
14            scroll = false,
15            scrollY,
16            scrollX,
17            view;
18            
19        if (window.navigator.msPointerEnabled)
20        
21            return false;
22            
23        $window.on('mousewheel DOMMouseScroll', function(e) {
24            
25            var deltaY = e.originalEvent.wheelDeltaY,
26                detail = e.originalEvent.detail;
27                scrollY = $document.height() > $window.height();
28                scrollX = $document.width() > $window.width();
29                scroll = true;
30            
31            if (scrollY) {
32                
33                view = $window.height();
34                    
35                if (deltaY < 0 || detail > 0)
36            
37                    root = (root + view) >= $document.height() ? root : root += step;
38                
39                if (deltaY > 0 || detail < 0)
40            
41                    root = root <= 0 ? 0 : root -= step;
42                
43                $body.stop().animate({
44            
45                    scrollTop: root
46                
47                }, speed, option, function() {
48            
49                    scroll = false;
50                
51                });
52            }
53            
54            if (scrollX) {
55                
56                view = $window.width();
57                    
58                if (deltaY < 0 || detail > 0)
59            
60                    root = (root + view) >= $document.width() ? root : root += step;
61                
62                if (deltaY > 0 || detail < 0)
63            
64                    root = root <= 0 ? 0 : root -= step;
65                
66                $body.stop().animate({
67            
68                    scrollLeft: root
69                
70                }, speed, option, function() {
71            
72                    scroll = false;
73                
74                });
75            }
76            
77            return false;
78            
79        }).on('scroll', function() {
80            
81            if (scrollY && !scroll) root = $window.scrollTop();
82            if (scrollX && !scroll) root = $window.scrollLeft();
83            
84        }).on('resize', function() {
85            
86            if (scrollY && !scroll) view = $window.height();
87            if (scrollX && !scroll) view = $window.width();
88            
89        });       
90    };
91    
92    jQuery.easing.default = function (x,t,b,c,d) {
93    
94        return -c * ((t=t/d-1)*t*t*t - 1) + b;
95    };
96    
97})(jQuery);