js email validation function code example
Example 1: javascript regex email
function validateEmail (emailAdress)
{
let regexEmail = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
if (emailAdress.match(regexEmail)) {
return true;
} else {
return false;
}
}
let emailAdress = "[email protected]";
console.log(validateEmail(emailAdress));
Example 2: js check if email is valid
function ValidateEmail(mail)
{
if (/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/.test(myForm.emailAddr.value))
{
return (true)
}
alert("You have entered an invalid email address!")
return (false)
}
Example 3: email validation in javascript
isValidEmail("[email protected]");
function isValidEmail(email) {
var emailRegex = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
return !!email && typeof email === 'string'
&& email.match(emailformat)};
};
Example 4: validate email javascript regex
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());
}
Example 5: javascript valid email adress
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,}))$/;
return re.test(String(email).toLowerCase());
}
Example 6: how to set validation for email in javascript
<script language="javascript">
function checkEmail() {
var email = document.getElementById('txtEmail');
var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
if (!filter.test(email.value)) {
alert('Please provide a valid email address');
email.focus;
return false;
}
}</script>