get hostname but check if hostname has subdomain [duplicate]

Question

I have to get a hostname without suffix and without subdomain.

exp:

URL: https://my-domain.com
URL2: https://my-domain.store.com

So I need only the my-domain how can I get this ?

Answer 1

checkout this

const url = new URL('http://example.com/path/index.html?param=value');
console.log(url.hostname) // gives example.com

and if it has a subdomain:

function getDomain(hostname) {
   hostname = hostname.split('.');
   hostname.reverse();
   return `${hostname[1]}.${hostname[0]}`;
}

url = new URL('http://test.example.com/path/index.html?param=value');
getDomain(url.hostname) // gives example.com

url = new URL('http://example.com/path/index.html?param=value');
getDomain(url.hostname) // gives example.com

taken from here