https://inabio.biodiversidad.gob.ec/wp-content/plugins/learnpress/assets/js/vendor/watch.js

1if (!Object.prototype.watchChange) {
2    var isFunction = function (fn) {
3        return fn && {}.toString.call(fn) === '[object Function]';
4    };
5    Object.defineProperty(
6        Object.prototype,
7        'watchChange',
8        {
9            enumerable: false,
10            configurable: true,
11            writable: false,
12            value: function (prop, handler) {
13                var obj = this;
14
15                function x(prop, handler) {
16                    var oldval = obj[prop],
17                        newval = oldval,
18                        getter = function () {
19                            return newval;
20                        },
21                        setter = function (val) {
22                            return newval = handler.call(obj, prop, oldval, val);
23                        };
24
25                    if (delete obj[prop]) {
26                        Object.defineProperty(
27                            obj,
28                            prop,
29                            {
30                                get: getter,
31                                set: setter,
32                                enumerable: true,
33                                configurable: true
34                            }
35                        );
36                    }
37                }
38
39                if (isFunction(prop)) {
40                    for (var k in this) {
41                        new x(k, prop);
42                    }
43                } else {
44                    new x(prop, handler)
45                }
46            }
47        });
48}
49
50if (!Object.prototype.unwatchChange) {
51    Object.defineProperty(
52        Object.prototype,
53        'unwatchChange',
54        {
55            enumerable: false,
56            configurable: true,
57            writable: false,
58            value: function (prop) {
59                var val = this[prop];
60                delete this[prop];
61                this[prop] = val;
62            }
63        }
64    );
65}