https://sport-speaker.com/wp-content/themes/andaman/assets/js/viewportchecker.js?ver=1.0-child

1/*
2    Version 1.3.2
3    The MIT License (MIT)
4
5    Copyright (c) 2014 Dirk Groenen
6
7    Permission is hereby granted, free of charge, to any person obtaining a copy of
8    this software and associated documentation files (the "Software"), to deal in
9    the Software without restriction, including without limitation the rights to
10    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11    the Software, and to permit persons to whom the Software is furnished to do so,
12    subject to the following conditions:
13
14    The above copyright notice and this permission notice shall be included in all
15    copies or substantial portions of the Software.
16*/
17
18(function($){
19    $.fn.viewportChecker = function(useroptions){
20        // Define options and extend with user
21        var options = {
22            classToAdd: 'visible',
23            offset: 100,
24            callbackFunction: function(elem){}
25        };
26        $.extend(options, useroptions);
27
28        // Cache the given element and height of the browser
29        var $elem = this,
30            windowHeight = $(window).height();
31
32        this.checkElements = function(){
33            // Set some vars to check with
34            var scrollElem = ((navigator.userAgent.toLowerCase().indexOf('webkit') != -1) ? 'body' : 'html'),
35                viewportTop = $(scrollElem).scrollTop(),
36                viewportBottom = (viewportTop + windowHeight);
37
38            $elem.each(function(){
39                var $obj = $(this);
40                // If class already exists; quit
41                if ($obj.hasClass(options.classToAdd)){
42                    return;
43                }
44
45                // define the top position of the element and include the offset which makes is appear earlier or later
46                var elemTop = Math.round( $obj.offset().top ) + options.offset,
47                    elemBottom = elemTop + ($obj.height());
48
49                // Add class if in viewport
50                if ((elemTop < viewportBottom) && (elemBottom > viewportTop)){
51                    $obj.addClass(options.classToAdd);
52
53                    // Do the callback function. Callback wil send the jQuery object as parameter
54                    options.callbackFunction($obj);
55                }
56            });
57        };
58
59        // Run checkelements on load and scroll
60        $(window).scroll(this.checkElements);
61        this.checkElements();
62
63        // On resize change the height var
64        $(window).resize(function(e){
65            windowHeight = e.currentTarget.innerHeight;
66        });
67    };
68})(jQuery);