https://www.babyandfamily.de/templates/Snackys/js/snackys/iefix.js

1  if ('NodeList' in window && !NodeList.prototype.forEach) {
2    NodeList.prototype.forEach = function (callback, thisArg) {
3      thisArg = thisArg || window;
4      for (var i = 0; i < this.length; i++) {
5        callback.call(thisArg, this[i], i, this);
6      }
7    };
8  }
9  
10function cssPreloadLinks()
11{
12    var links = document.getElementsByTagName('link');
13    for (var i = 0; i < links.length; i++) {
14        var link = links[i];
15        // qualify links to those with rel=preload and as=style attrs
16        if (link.rel === 'preload' && link.getAttribute('as') === 'style') {
17            // prevent re-running on link
18            link.setAttribute('rel', 'stylesheet');
19        }
20    }
21}
22
23document.addEventListener('DOMContentLoaded', function(){
24	cssPreloadLinks()
25});
26cssPreloadLinks();