[JavaScript] Email validation

자바스크립트 정규식을 이용한 이메일 유효성 검사

stackoverflow.com/questions/46155/how-to-validate-an-email-address-in-javascript

How to validate an email address in JavaScript

  function validateEmail(email) {
    const re = /^(([^<>()[\]\\.,;:\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 re.test(String(email).toLowerCase());
  }