Test, validate and match regular expressions
A simple email validation pattern that matches the standard structure of local-part@domain.tld. The local part allows alphanumeric characters and common special characters (._%+-), followed by @, a domain name with alphanumeric characters, dots, and hyphens, ending with a 2-3 character top-level domain. This regex is commonly used in form validation, contact forms, and user registration flows, though it's a basic pattern that may not catch all valid email formats or newer TLDs.