This regex pattern is designed to validate URLs with the following key features:

1. Protocol Support: Optionally matches http:// or https://.
2. Subdomain Handling: Supports optional www. and valid subdomains.
3. Domain Name Validation: Ensures proper formatting of domain names:
   • Prevents double hyphens (--) in domain or subdomain names.
   • Enforces domain name length between 1 and 63 characters per label.
4. Top-Level Domain (TLD): Validates TLDs with 2 or more alphabetic characters.
5. Trailing Slash: Optionally allows a trailing slash (/) at the end of the URL.

Example Matches:

• https://www.example.com
• http://example.org
• example.net/

Example Non-Matches:

• http://-example.com (invalid hyphen usage)
• https://example..com (double dot)
• ftp://example.com (unsupported protocol)

Feel free to test and tweak as per your requirements! 🎯