this doesn't work with website domains with like wowww dot com. I feel it's necessary to just go with startswith checks which is a lot safer practice.

This breaks if the tld isn't www, which is extremely common.

I skipped mine because I couldn't get regex to work on it. This is a much more elegant solution. Good stuff!

nice bruh

wow, so clever

Doesn't work with the url like:
http://cooooowww.com

Last replace should contain position check, something like:
if (url.indexOf('www.') == 0) url = url.replace("www.", '');

This won't work if the url provided has a subdomain e.g domainName("https://www.subdomin.domain.com/awdawda?zzz=123&user=momo") will return subdomin

I love the way your code is organized. It is easy to read and understand

What was the hack?

replace crossed my mind for a second, nicely done!

arghh, why didn't I think of replace haha

this is "the perfection" in a code

Good solution and faster