password validation js code example
Example 1: javascript password validation special character
function CheckPassword(inputtxt)
{
var paswd= /^(?=.*[0-9])(?=.*[!@#$%^&*])[a-zA-Z0-9!@#$%^&*]{7,15}$/;
if(inputtxt.value.match(paswd))
{
alert('Correct, try another...')
return true;
}
else
{
alert('Wrong...!')
return false;
}
}
Example 2: password and confirm password validation js
var check = function() {
if (document.getElementById('password').value ==
document.getElementById('confirm_password').value) {
document.getElementById('message').style.color = 'green';
document.getElementById('message').innerHTML = 'matching';
} else {
document.getElementById('message').style.color = 'red';
document.getElementById('message').innerHTML = 'not matching';
}
}
Example 3: password validation with regular expression in javascript
var strongRegex = new RegExp("^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{8,})");
Example 4: Javascript validate password
let pattern = new RegExp("^(?=(.*[a-zA-Z]){1,})(?=(.*[0-9]){2,}).{8,}$"); //Regex: At least 8 characters with at least 2 numericals
let inputToListen = document.getElementById('pass-one'); // Get Input where psw is write
let valide = document.getElementsByClassName('indicator')[0]; //little indicator of validity of psw
inputToListen.addEventListener('input', function () { // Add event listener on input
if(pattern.test(inputToListen.value)){
valide.innerHTML = 'ok';
}else{
valide.innerHTML = 'not ok'
}
});