问获取子域并使用greasemonkey将其加载到url

EN

var full = window.location.host
//window.location.host is subdomain.domain.com
var parts = full.split('.')
var sub = parts[0]
var domain = parts[1]
var type = parts[2]
//sub is 'subdomain', 'domain', type is 'com'
var newUrl = 'http://' + domain + '.' + type + '/your/other/path/' + subDomain
window.open(newUrl);

const split=location.host.split(".");
let subdomain="";
let domain="";
if(split.length==1){//localHost
  domain=split[0];
}else if(split.length==2){//sub.localHost or example.com
  if(split[1].includes("localhost")){//sub.localHost
    domain=split[1];
    subdomain=split[0];
  }else{//example.com
    domain=split.join(".");
  }
}else{//sub2.sub.localHost or sub2.sub.example.com or sub.example.com or example.com.ec sub.example.com.ec or  ... etc
  const last=split[split.length-1];
  const lastLast=split[split.length-2];
  if(last.includes("localhost")){//sub2.sub.localHost
    domain=last;
    subdomain=split.slice(0,split.length-1).join(".");
  }else if(last.length==2 && lastLast.length<=3){//example.com.ec or sub.example.com.ec
    domain=split.slice(split.length-3,split.length).join(".");
    if(split.length>3){//sub.example.com.ec
      subdomain=split.slice(0,split.length-3).join(".");
    }
  }else{//sub2.sub.example.com
    domain=split.slice(split.length-2,split.length).join(".");
    subdomain=split.slice(0,split.length-2).join(".");
  }
}
const newUrl = 'http://example.com/some/path/here/' + subdomain

const splitHostname = (
    hostname: string
  ): { domain: string; type: string; subdomain: string } | undefined => {
    var urlParts = /([a-z-0-9]{2,63}).([a-z.]{2,5})$/.exec(hostname);
    if (!urlParts) return;
    const [, domain, type] = urlParts;
    const subdomain = hostname.replace(`${domain}.${type}`, "").slice(0, -1);
    return {
      domain,
      type,
      subdomain,
    };
  };