https://www.gov.me/assets/js/cyr2lat/polyfills.js

1if (!Array.prototype.includes) {
2    Object.defineProperty(Array.prototype, 'includes', {
3        value: function(searchElement, fromIndex) {
4
5            if (this == null) {
6                throw new TypeError('"this" is null or not defined');
7            }
8
9            // 1. Let O be ? ToObject(this value).
10            var o = Object(this);
11
12            // 2. Let len be ? ToLength(? Get(O, "length")).
13            var len = o.length >>> 0;
14
15            // 3. If len is 0, return false.
16            if (len === 0) {
17                return false;
18            }
19
20            // 4. Let n be ? ToInteger(fromIndex).
21            //    (If fromIndex is undefined, this step produces the value 0.)
22            var n = fromIndex | 0;
23
24            // 5. If n ≥ 0, then
25            //  a. Let k be n.
26            // 6. Else n < 0,
27            //  a. Let k be len + n.
28            //  b. If k < 0, let k be 0.
29            var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
30
31            function sameValueZero(x, y) {
32                return x === y || (typeof x === 'number' && typeof y === 'number' && isNaN(x) && isNaN(y));
33            }
34
35            // 7. Repeat, while k < len
36            while (k < len) {
37                // a. Let elementK be the result of ? Get(O, ! ToString(k)).
38                // b. If SameValueZero(searchElement, elementK) is true, return true.
39                if (sameValueZero(o[k], searchElement)) {
40                    return true;
41                }
42                // c. Increase k by 1.
43                k++;
44            }
45
46            // 8. Return false
47            return false;
48        }
49    });
50}
51
52if (!NodeList.prototype.forEach) {
53    NodeList.prototype.forEach = function(fn, scope) {
54        for(var i = 0, len = this.length; i < len; ++i) {
55            fn.call(scope, this[i], i, this);
56        }
57    }
58}