https://bromleycleaners.org.uk/assets/js/fontawesome_async.js

1(function() {
2  let loaded = false;
3
4  function loadFontAwesome() {
5    if (loaded) return;
6    loaded = true;
7
8    const hasFAIcon = document.querySelector('i[class*="fa-"]');
9    if (!hasFAIcon) return;
10
11    const link = document.createElement('link');
12    link.rel = 'stylesheet';
13    link.href = 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.7.2/css/all.min.css';
14    link.media = 'print';
15    link.onload = function() {
16      this.media = 'all';
17    };
18    document.head.appendChild(link);
19  }
20
21  // Load FA after user interacts (most efficient)
22  ['mousemove', 'scroll', 'keydown', 'touchstart'].forEach(evt => {
23    window.addEventListener(evt, loadFontAwesome, { once: true });
24  });
25
26  // Also load it after 3s just in case
27  setTimeout(loadFontAwesome, 3000);
28})();