Check if an email is valid or not

get-is-email-valid.ts

function getIsEmailValid(email: string): boolean {
  if (!email.includes('@') || !email.includes('.')) {
    return false;
  }

  const parts = email.split('@');

  const hasMoreThanOneAtSymbol = parts.length !== 2;
  if (hasMoreThanOneAtSymbol) {
    return false;
  }

  const [local, domain] = parts;

  const isLocalIncorrect = local.length === 0;
  if (isLocalIncorrect) {
    return false;
  }

  const isDomainIncorrect = !domain.includes('.') || domain.startsWith('.') || domain.endsWith('.');
  if (isDomainIncorrect) {
    return false;
  }

  return true;
}

console.log(getIsEmailValid('test@example.com'));
console.log(getIsEmailValid('test@example'));
console.log(getIsEmailValid('test@.com'));
console.log(getIsEmailValid('@example.com'));
console.log(getIsEmailValid('test@@example.com'));
console.log(getIsEmailValid('test@example.com.'));