https://www.discorp.com/wp-content/themes/dis-corp/dist/assets/js/jquery.aniview.js?ver=2.110

1(function($) {
2
3    //custom scroll replacement to allow for interval-based 'polling'
4    //rather than checking on every pixel.
5    var uniqueCntr = 0;
6    $.fn.scrolled = function(waitTime, fn) {
7        if (typeof waitTime === 'function') {
8            fn = waitTime;
9            waitTime = 200;
10        }
11        var tag = 'scrollTimer' + uniqueCntr++;
12        this.scroll(function() {
13            var self = $(this);
14            clearTimeout(self.data(tag));
15            self.data(tag, setTimeout(function() {
16                self.removeData(tag);
17                fn.call(self[0]);
18            }, waitTime));
19        });
20    };
21
22    $.fn.AniView = function(options) {
23
24        //some default settings. animateThreshold controls the trigger point
25        //for animation and is subtracted from the bottom of the viewport.
26        var settings = $.extend({
27            animateClass: 'animated',
28            animateThreshold: 0,
29            scrollPollInterval: 20,
30        }, options);
31
32        //keep the matched elements in a variable for easy reference
33        var collection = this;
34
35        //cycle through each matched element and wrap it in a block/div
36        //and then proceed to fade out the inner contents of each matched element
37        // $(collection).each(function(index, element) {
38        //     // $(element).wrap('<div class="av-container"></div>');
39        //     $(element).css('opacity', 0);
40        // });
41
42        /**
43         * returns boolean representing whether element's top is coming into bottom of viewport
44         *
45         * @param HTMLDOMElement element the current element to check
46         */
47        function EnteringViewport(element) {
48            var elementTop = $(element).offset().top;
49            var viewportBottom = $(window).scrollTop() + $(window).height();
50            return (elementTop < (viewportBottom - settings.animateThreshold)) ? true : false;
51        }
52
53        /**
54         * cycle through each element in the collection to make sure that any
55         * elements which should be animated into view, are...
56         *
57         * @param collection of elements to check
58         */

59        function RenderElementsCurrentlyInViewport(collection) {
60            $(collection).each(function(index, element) {
61                var elementParentContainer = $(element).parent('.av-container');
62                if ($(element).is('[data-av-animation]') && !$(elementParentContainer).hasClass('av-visible') && EnteringViewport(elementParentContainer)) {
63                    $(element).css('opacity', 1);
64                    $(elementParentContainer).addClass('av-visible');
65                    $(element).addClass([settings.animateClass, $(element).attr('data-av-animation')].join(' '));
66                }
67            });
68        }
69
70        //on page load, render any elements that are currently/already in view
71        RenderElementsCurrentlyInViewport(collection);
72
73        //enable the scrolled event timer to watch for elements coming into the viewport
74        //from the bottom. default polling time is 20 ms. This can be changed using
75        //'scrollPollInterval' from the user visible options
76        $(window).scrolled(settings.scrollPollInterval, function() {
77            RenderElementsCurrentlyInViewport(collection);
78        });
79    };
80})(jQuery);