export const validateEmail = (email: string, options: { style: string } = { style: 'basic' }): boolean => { const basicEmailRegex = /^[^@]+@[^@]+$/; const rfcEmailRegex = /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[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])?)*$/; switch (options.style) { case 'rfc': return rfcEmailRegex.test(email); case 'basic': default: return basicEmailRegex.test(email); } };