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Email Address Validation

Description

Robust email validation using RFC 5322 compliant regular expression

Code

/**
 * Validate email address format
 * @param email Email address to validate
 * @returns True if valid email, false otherwise
 */
function isValidEmail(email: string): boolean {
  const re = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
  return re.test(email);
}

// Usage Example
console.log(isValidEmail('[email protected]')); // true
console.log(isValidEmail('[email protected]')); // true
console.log(isValidEmail('invalid-email')); // false

Usage

Essential for form validation, user registration, or any scenario requiring email format verification

Tags

ValidationRegexForm Validation