JavaScript 从网址中删除域名（不含http：//）

Posted 2021-05-20

function getDomain(str)
{
   if (str == null || str.length == 0)
      return "";
   
   str = cleanURL(str).toLowerCase();
   
   var i = str.indexOf("/");
   if (i > -1)
      str = str.substring(0, i);
      
   var parts = str.split('.');
   
   var len = parts.length;
   
   if (len < 3)
      return str;

   var lastPart = parts[len-1];
   var secondPart;
         
   secondPart = parts[len-2];
   
   var two = 2;
   
   if (lastPart == "uk" && secondPart == "co")
      ++two;
   
   if (len >= 0)
      return parts.splice(len-two, two).join('.');
   
   return "";
}