CODE EXAMPLE FOR JAVASCRIPT

how to accept only. proper email from an input field react with functional component

if (typeof input["email"] !== "undefined") {
   var pattern = new RegExp(/^(("[w-s]+")|([w-]+(?:.[w-]+)*)|("[w-s]+")([w-]+(?:.[w-]+)*))(@((?:[w-]+.)*w[w-]{0,66}).([a-z]{2,6}(?:.[a-z]{2})?)$)|(@[?((25[0-5].|2[0-4][0-9].|1[0-9]{2}.|[0-9]{1,2}.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2}).){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})]?$)/i);
   if (!pattern.test(input["email"])) {
      isValid = false;
      errors["email"] = "Please enter valid email address.";
   }
}