extract hostname

extract.js

function extractHostname(url) {
	var hostname;
	//find & remove protocol (http, ftp, etc.) and get hostname
	if (url.indexOf("//") > -1) {
		hostname = url.split('/')[2];
	}
	else {
		hostname = url.split('/')[0];
	}
	//find & remove port number
	hostname = hostname.split(':')[0];
	//find & remove "?"
	hostname = hostname.split('?')[0];
	return hostname;
}

const getHostnameFromRegex = (url) => {
  // run against regex
  const matches = url.match(/^https?\:\/\/([^\/?#]+)(?:[\/?#]|$)/i);
  // extract hostname (will be null if no match is found)
  return matches && matches[1];
}