Searching for a specific regex pattern in Javascript to confirm that a hostname is a subdomain and not a top-level domain. Take this scenario:
deny domain.uk
allow sub.domain.uk
deny domain.ac.uk
allow sub.domain.ac.uk
Searching for a specific regex pattern in Javascript to confirm that a hostname is a subdomain and not a top-level domain. Take this scenario:
deny domain.uk
allow sub.domain.uk
deny domain.ac.uk
allow sub.domain.ac.uk
It may be more effective to use a blacklist and whitelist rather than relying solely on regular expressions in this scenario.
const blackList = ['http://', 'https://'];
const whiteList = ['www.exampledomain.com', 'www.anotherexample.net']
if (blackList.indexOf(domain) < 0 && whiteList.indexOf(domain) >=0)
console.log('Domain is valid');
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