https://wpfactory.com/wp-content/themes/wpfactory-theme/assets/js/wpfactory-buy-feedback.js?ver=1.0.0

1/**
2 * WPFactory - Add to cart click feedback.
3 *
4 * Our buy CTAs are plain links that navigate to add-to-cart. The server
5 * does not always answer instantly, so the click can look ignored, and
6 * people click again. Each extra click is another add-to-cart request,
7 * which stacks duplicate quantities into the cart.
8 *
9 * On the first click the button locks and shows a spinner. Any further
10 * click is swallowed. The navigation itself is left alone.
11 *
12 * Scoped to a.btn on purpose. WooCommerce and Storefront render their
13 * own add-to-cart links with .button and .ajax_add_to_cart, and those
14 * do not navigate, they fire AJAX and stay on the page. Locking one of
15 * those would break it, so they are excluded twice over.
16 */
17(function () {
18  'use strict';
19
20  var SELECTOR = 'a.btn[href*="add-to-cart="]:not(.ajax_add_to_cart):not(.add_to_cart_button)';
21  var RESET_AFTER = 12000;
22
23  function lockOnClick(link) {
24    link.addEventListener('click', function (e) {
25      if (link.classList.contains('is-buying')) {
26        e.preventDefault();
27        return;
28      }
29
30      var original = link.textContent;
31      link.classList.add('is-buying');
32      link.setAttribute('aria-busy', 'true');
33      link.textContent = 'Adding to cart';
34
35      // If the navigation never lands (offline, blocked, or the visitor
36      // comes back via the bfcache), hand the button back rather than
37      // leaving it stuck spinning forever.
38      var reset = function () {
39        link.classList.remove('is-buying');
40        link.removeAttribute('aria-busy');
41        link.textContent = original;
42      };
43
44      setTimeout(reset, RESET_AFTER);
45      window.addEventListener('pageshow', function (ev) {
46        if (ev.persisted) reset();
47      });
48    });
49  }
50
51  function init() {
52    document.querySelectorAll(SELECTOR).forEach(lockOnClick);
53  }
54
55  if (document.readyState === 'loading') {
56    document.addEventListener('DOMContentLoaded', init);
57  } else {
58    init();
59  }
60})();