https://lendingsciencedm.com/wp-content/themes/dp_evolve/js/appear.js?ver=7.0.5

1/*
2 * jQuery appear plugin
3 *
4 * Copyright (c) 2012 Andrey Sidorov
5 * licensed under MIT license.
6 *
7 * https://github.com/morr/jquery.appear/
8 *
9 * Version: 0.3.3
10 */
11(function($) {
12  var selectors = [];
13
14  var check_binded = false;
15  var check_lock = false;
16  var defaults = {
17    interval: 250,
18    force_process: false
19  }
20  var $window = $(window);
21
22  var $prior_appeared;
23
24  function process() {
25    check_lock = false;
26    for (var index = 0; index < selectors.length; index++) {
27      var $appeared = $(selectors[index]).filter(function() {
28        return $(this).is(':appeared');
29      });
30
31      $appeared.trigger('appear', [$appeared]);
32
33      if ($prior_appeared) {
34        var $disappeared = $prior_appeared.not($appeared);
35        $disappeared.trigger('disappear', [$disappeared]);
36      }
37      $prior_appeared = $appeared;
38    }
39  }
40
41  // "appeared" custom filter
42  $.expr[':']['appeared'] = function(element) {
43    var $element = $(element);
44    if (!$element.is(':visible')) {
45      return false;
46    }
47
48    var window_left = $window.scrollLeft();
49    var window_top = $window.scrollTop();
50    var offset = $element.offset();
51    var left = offset.left;
52    var top = offset.top;
53
54    if (top + $element.height() >= window_top &&
55        top - ($element.data('appear-top-offset') || 0) <= window_top + $window.height() &&
56        left + $element.width() >= window_left &&
57        left - ($element.data('appear-left-offset') || 0) <= window_left + $window.width()) {
58      return true;
59    } else {
60      return false;
61    }
62  }
63
64  $.fn.extend({
65    // watching for element's appearance in browser viewport
66    appear: function(options) {
67      var opts = $.extend({}, defaults, options || {});
68      var selector = this.selector || this;
69      if (!check_binded) {
70        var on_check = function() {
71          if (check_lock) {
72            return;
73          }
74          check_lock = true;
75
76          setTimeout(process, opts.interval);
77        };
78
79        $(window).scroll(on_check).resize(on_check);
80        check_binded = true;
81      }
82
83      if (opts.force_process) {
84        setTimeout(process, opts.interval);
85      }
86      selectors.push(selector);
87      return $(selector);
88    }
89  });
90
91  $.extend({
92    // force elements's appearance check
93    force_appear: function() {
94      if (check_binded) {
95        process();
96        return true;
97      };
98      return false;
99    }
100  });
101})(jQuery);
102
103
104(function($) {
105    $.fn.appear1 = function(fn, options) {
106
107        var settings = $.extend({
108
109            //arbitrary data to pass to fn
110            data: undefined,
111
112            //call fn only on the first appear?
113            one: true,
114
115            // X & Y accuracy
116            accX: 0,
117            accY: 0
118
119        }, options);
120
121        return this.each(function() {
122
123            var t = $(this);
124
125            //whether the element is currently visible
126            t.appeared = false;
127
128            if (!fn) {
129
130                //trigger the custom event
131                t.trigger('appear1', settings.data);
132                return;
133            }
134
135            var w = $(window);
136
137            //fires the appear event when appropriate
138            var check = function() {
139
140                //is the element hidden?
141                if (!t.is(':visible')) {
142
143                    //it became hidden
144                    t.appeared = false;
145                    return;
146                }
147
148                //is the element inside the visible window?
149                var a = w.scrollLeft();
150                var b = w.scrollTop();
151                var o = t.offset();
152                var x = o.left;
153                var y = o.top;
154
155                var ax = settings.accX;
156                var ay = settings.accY;
157                var th = t.height();
158                var wh = w.height();
159                var tw = t.width();
160                var ww = w.width();
161
162                if (y + th + ay >= b &&
163                    y <= b + wh + ay &&
164                    x + tw + ax >= a &&
165                    x <= a + ww + ax) {
166
167                    //trigger the custom event
168                    if (!t.appeared) t.trigger('appear1', settings.data);
169
170                } else {
171
172                    //it scrolled out of view
173                    t.appeared = false;
174                }
175            };
176
177            //create a modified fn with some additional logic
178            var modifiedFn = function() {
179
180                //mark the element as visible
181                t.appeared = true;
182
183                //is this supposed to happen only once?
184                if (settings.one) {
185
186                    //remove the check
187                    w.unbind('scroll', check);
188                    var i = $.inArray(check, $.fn.appear.checks);
189                    if (i >= 0) $.fn.appear.checks.splice(i, 1);
190                }
191
192                //trigger the original fn
193                fn.apply(this, arguments);
194            };
195
196            //bind the modified fn to the element
197            if (settings.one) t.one('appear1', settings.data, modifiedFn);
198            else t.bind('appear1', settings.data, modifiedFn);
199
200            //check whenever the window scrolls
201            w.scroll(check);
202
203            //check whenever the dom changes
204            $.fn.appear1.checks.push(check);
205
206            //check now
207            (check)();

208        });
209    };
210
211    //keep a queue of appearance checks
212    $.extend($.fn.appear1, {
213
214        checks: [],
215        timeout: null,
216
217        //process the queue
218        checkAll: function() {
219            var length = $.fn.appear1.checks.length;
220            if (length > 0) while (length--) ($.fn.appear1.checks[length])();
221        },
222
223        //check the queue asynchronously
224        run: function() {
225            if ($.fn.appear1.timeout) clearTimeout($.fn.appear1.timeout);
226            $.fn.appear1.timeout = setTimeout($.fn.appear1.checkAll, 20);
227        }
228    });
229
230   
231
232})(jQuery);