js动态修改浏览器页签图标ico

// iconUrl: http://www.ico51.cn/favicon.ico
handleIcoCreate(icoUrl){
    var link= document.querySelector("link[rel*='icon']") || document.createElement('link');
    link.type = 'image/x-icon';
    link.rel = 'shortcut icon';
    link.href = icoUrl 
    document.getElementsByTagName('head')[0].appendChild(link);
}