JAVASCRIPT

How can I validate an email address in JavaScript

/**
 * verifie si la chaine renseigné est un email
 * check if email is valide
 * @param string emailAdress
 * @return bool
 */
function isEmail(emailAdress){
    let regex = /^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/;

  if (emailAdress.match(regex)) 
    return true; 

   else 
    return false; 
}

//see https://regexr.com/3e48o for another exemple

js email regex

//! check email is valid
function checkEmail(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,}))$/;
  if (re.test(email.value.trim())) {
    console.log('email is valid') 
  } else {
    console.log('email is not valid')
  }
}

Javascript validate email

function validateEmail($email) {
  var emailReg = /^([w-.]+@([w-]+.)+[w-]{2,4})?$/;
  return emailReg.test( $email );
}

if( !validateEmail(emailaddress)) { /* do stuff here */ }

avascript regex email

function Validate (InputEmail){
  if (InputEmail.match(/^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/)) {
    return true; 
  } else {
    return false; 
  }
}

console.log(Validate("example@gmail.com"));

email regex javascript

//Expression
let regex = /^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/;
let email = "test.gmail.com"
//Execution
if(email.match(regex)){
console.log("valid")
}else{
console.log("Invalid")
}

javascript email validation

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,}))$/;

function App() {
  const [email, setEmail] = React.useState({
    error: false,
    value: ""
  });

  const handleChange = (e: any) => {
    // Trim value & convert to lowercase
    const value = e.target.value.trim().toLowerCase();

    // Test if email is valid
    const isValidEmail = re.test(value);

    setEmail({
      value,
      error: !isValidEmail
    });
  };

  return (
    <>
      <input placeholder="Email" onChange={handleChange} />
      {email.error && <p>Please enter a valid email address.</p>}
    </>
  );
}

js email validation

if(value.match( /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:.[a-zA-Z0-9-]+)*$/gi)){
//code here
}

email valid javascript

/^[^s@]+@[^s@]+.[^s@]+$/

check email id valid or not without using regex in javascript

function ValidateEmailAddress(emailString) {
    // check for @ sign
    var atSymbol = emailString.indexOf("@");
    if(atSymbol < 1) return false;
    
    var dot = emailString.indexOf(".");
    if(dot <= atSymbol + 2) return false;
    
    // check that the dot is not at the end
    if (dot === emailString.length - 1) return false;
    
    return true;
}

checks for valid email address syntax javascript

var str = "Java Script Object Notation";
var matches = str.match(/(w)/g); // ['J','S','O','N']
var acronym = matches.join(''); // JSON

console.log(acronym)
 Run code snippet

checks for valid email address syntax javascript

let str = "Java Script Object Notation";
let acronym = str.split(/s/).reduce((response,word)=> response+=word.slice(0,1),'')

console.log(acronym);
 Run code snippet

checks for valid email address syntax javascript

var str = "Java Script Object Notation";
var matches = str.match(/(w)/g); // ['J','S','O','N']
var acronym = matches.join(''); // JSON

console.log(acronym)
 Run code snippet