js动态修改网站的favicon

//页面设置favicon

var faviconurl="https://....." ;//这里可以是动态的获取的favicon的地址                      

    var link = document.querySelector("link[rel*='icon']") || document.createElement('link');

                            link.type = 'image/x-icon';

                            link.rel = 'shortcut icon';

                            link.href = faviconurl;

                            document.getElementsByTagName('head')[0].appendChild(link);