https://zalezynam.pl/polyfills.js

1document.documentElement.setAttribute('data-useragent', navigator.userAgent);
2
3// https://developer.mozilla.org/pl/docs/Web/JavaScript/Referencje/Obiekty/Array/find
4if (!Array.prototype.find) {
5  Array.prototype.find = function (predicate) {
6    if (this == null) {
7      throw new TypeError('Array.prototype.find called on null or undefined');
8    }
9    if (typeof predicate !== 'function') {
10      throw new TypeError('predicate must be a function');
11    }
12    var list = Object(this);
13    var length = list.length >>> 0;
14    var thisArg = arguments[1];
15    var value;
16
17    for (var i = 0; i < length; i++) {
18      value = list[i];
19      if (predicate.call(thisArg, value, i, list)) {
20        return value;
21      }
22    }
23    return undefined;
24  };
25}