emailValidator.ts

export const isEmailValid = (email: string): boolean => {
  /**
   * The following is the RFC 5322 valid email regex
   * Hinted from question https://stackoverflow.com/questions/201323/how-to-validate-an-email-address-using-a-regular-expression
   * More on http://emailregex.com/
   */
  // eslint-disable-next-line
  const VALID_EMAIL_REGEX = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  return VALID_EMAIL_REGEX.test(String(email).toLowerCase());
};