How to validate password using following conditions

Question

Password should contain

1. At least one uppercase letter
2. At least one lowercase letter
3. At least one digit
4. At least one special symbol
5. should be more than 4 character

I have tried - ^(?=.*\d)(?=.*[a-zA-Z])[a-zA-Z0-9!@#$%&*]{6,20}$

Answer 1

You don't need some massive single regular expression that would very certainly contain arcana like lookaheads and would be difficult to maintain as more conditions were added. All you require is

function validatePassword(pw) {

    return /[A-Z]/       .test(pw) &&
           /[a-z]/       .test(pw) &&
           /[0-9]/       .test(pw) &&
           /[^A-Za-z0-9]/.test(pw) &&
           pw.length > 4;

}