JAVASCRIPT

js regex for password

for REACT INPUT TAG

var errorMessage:
"Password should be 8-20 characters and include at least 1 letter, 1 number and 1 special character!",
<input name= "password",
type= "password",
placeholder= "Password",
pattern="^(?=.*[0-9])(?=.*[a-zA-Z])(?=.*[!@#$%^&*])[a-zA-Z0-9!@#$%^&*]{8,20}$",
required/>

password regex javascript long way

function validatePassword() {
    var p = document.getElementById('newPassword').value,
        errors = [];
    if (p.length < 8) {
        errors.push("Your password must be at least 8 characters"); 
    }
    if (p.search(/[a-z]/i) < 0) {
        errors.push("Your password must contain at least one letter.");
    }
    if (p.search(/[0-9]/) < 0) {
        errors.push("Your password must contain at least one digit."); 
    }
    if (errors.length > 0) {
        alert(errors.join("
"));
        return false;
    }
    return true;
}