https://www.obec-uncin.cz/assets/fe/js/invisibleRecaptcha.js?v=1660118449

1(function(document, Nette, grecaptcha) {
2	var init = false;
3
4	// polyfill for closest() - method for traversing DOM and finding the closest parent matching given selector (form, in our case)
5	// @see https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Polyfill
6	if (!Element.prototype.matches) {
7		Element.prototype.matches =
8			Element.prototype.msMatchesSelector ||
9			Element.prototype.mozMatchesSelector ||
10			Element.prototype.webkitMatchesSelector;
11	}
12
13	if (!Element.prototype.closest) {
14		Element.prototype.closest = function(s) {
15			var el = this;
16
17			do {
18				if (Element.prototype.matches.call(el, s)) return el;
19				el = el.parentElement || el.parentNode;
20			} while (el !== null && el.nodeType === 1);
21			return null;
22		};
23	}
24
25	Nette.recaptcha = function (grecaptcha) {
26		var items = document.getElementsByClassName('g-recaptcha');
27		var length = items.length;
28
29		if (length === 0) {
30			return;
31		}
32
33		grecaptcha.ready(function () {
34			var resolved = false;
35			var submitListenerFactory = function(form) {
36				return function (e) {
37					// we already have reCaptcha response, or the form is invalid - or submission is prevented for some other, unknown reason
38					if (resolved || e.defaultPrevented) {
39						return;
40					}
41
42					e.preventDefault();
43
44					grecaptcha.execute().then(function (token) {
45						resolved = true;
46
47						// reCaptcha token expires after 2 minutes; make it 5 seconds earlier just in case network is slow
48						setTimeout(function(){ resolved = false; }, (2 * 60 - 5) * 1000);
49
50						var inputs = document.getElementsByClassName('g-recaptcha-response');
51						for (var i = 0; i < inputs.length; i++) {
52							inputs[i].value = token;
53						}
54
55						form.submit();
56					});
57				};
58			};
59
60			var form;
61			for (var i = 0; i < length; i++) {
62				grecaptcha.render(items[i]);
63
64				form = items[i].closest('form');
65				form.addEventListener('submit', submitListenerFactory(form));
66			}
67		});
68		init = true;
69	};
70
71	if (!init) {
72		Nette.recaptcha(grecaptcha);
73	}
74})(document, Nette, grecaptcha);