Regex Tester & Validator

This regex is intended to match domain names or URLs with specific top-level domains (.com, .es, .net, .org, .co). It optionally allows 'http://' or 'https://' prefixed with 'www.', along with optional whitespace around the domain. However, it contains common flaws like using character classes `[www.]` instead of literal strings and unescaped dots `.` before the TLDs, making it a naive validation pattern.