function checkEmail() {
var email = document.getElementById('txtEmail');
var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
if (!filter.test(email.value)) {
alert('Please provide a valid email address');
email.focus;
return false;
}
}
- Call the function on Email textbox
/**
* verifie si la chaine renseigné est un email
* check if email is valide
* @param string emailAdress
* @return bool
*/
function isEmail(emailAdress){
let regex = /^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/;
if (emailAdress.match(regex))
return true;
else
return false;
}
//see https://regexr.com/3e48o for another exemple
//! 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')
}
}
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;
}