https://www.ncsbe.gov/themes/custom/nc_barrio/components/stat_card/js/jquery.viewport.js?tlsflo

1/*
2 * Viewport - jQuery selectors for finding elements in viewport
3 *
4 * Copyright (c) 2008-2009 Mika Tuupola
5 *
6 * Licensed under the MIT license:
7 *   http://www.opensource.org/licenses/mit-license.php
8 *
9 * Project home:
10 *  http://www.appelsiini.net/projects/viewport
11 *
12 */
13(function($) {
14
15  $.belowthefold = function(element, settings) {
16    var fold = $(window).height() + $(window).scrollTop();
17    return fold <= $(element).offset().top - settings.threshold;
18  };
19
20  $.abovethetop = function(element, settings) {
21    var top = $(window).scrollTop();
22    return top >= $(element).offset().top + $(element).height() - settings.threshold;
23  };
24
25  $.rightofscreen = function(element, settings) {
26    var fold = $(window).width() + $(window).scrollLeft();
27    return fold <= $(element).offset().left - settings.threshold;
28  };
29
30  $.leftofscreen = function(element, settings) {
31    var left = $(window).scrollLeft();
32    return left >= $(element).offset().left + $(element).width() - settings.threshold;
33  };
34
35  $.inviewport = function(element, settings) {
36    return !$.rightofscreen(element, settings) && !$.leftofscreen(element, settings) && !$.belowthefold(element, settings) && !$.abovethetop(element, settings);
37  };
38
39  $.extend($.expr[':'], {
40    "below-the-fold": function(a, i, m) {
41      return $.belowthefold(a, {threshold : 0});
42    },
43    "above-the-top": function(a, i, m) {
44      return $.abovethetop(a, {threshold : 0});
45    },
46    "left-of-screen": function(a, i, m) {
47      return $.leftofscreen(a, {threshold : 0});
48    },
49    "right-of-screen": function(a, i, m) {
50      return $.rightofscreen(a, {threshold : 0});
51    },
52    "in-viewport": function(a, i, m) {
53      return $.inviewport(a, {threshold : 0});
54    }
55  });
56
57
58})(jQuery);