验证密码 - 必须包含 2 个大写字母

Question

Can someone tell me why this function doesn't work? the password length and the check of number work perfectly. But it is something wrong with the check of big capitals...

function validera() {
var passw = document.getElementById("User-Password").value;
var upper = /[A-Z]/ ;
var number = /[0-9]/;

if (passw.length < 6 || !number.test(passw) || !upper.test(passw)) {
    if (passw.length < 6) {
        alert("Please make sure password is longer than 6 characters.")
        return false;
    }

    var counter = 0;
    var i;
    for(i = 0; i < passw.length; i++){
       passw.charAt(i)
       if(upper.test(passw.charAt(i))){
           counter++;
           break;
       }
   }

    if( counter < 2 ){
        alert("Please make sure password includes 2 capital letters")
        return false;

    }

    if (!number.test(passw)) {
        alert("Please make sure Password Includes a Digit")
        return false;
    }

} else {
    alert("Account created")
}

Or do I have to use regex?

Answer 1

If you are planning to use regex to find two capital letters then you can use like

\w*[A-Z]\w*[A-Z]\w*

Test this here on regextester

Answer 2

Here Check it out Fiddle

CreateRandomPassword(Length, isUpperAlpha, isLowerAlpha, isNumaric ,SpecialChars)

I have developed easy function to generate password

Answer 3

Here's a function that returns an object with a message and a boolean.

Example snippet:

 function testPassword(pwd) { if (pwd.length <= 6) return { valid: false, message: "Please make sure password is longer than 6 characters." }; if(!/[AZ].*[AZ]/.test(pwd)) return { valid: false, message: "Please make sure password includes 2 capital letters" }; if (!/\\d/.test(pwd)) return { valid: false, message: "Please make sure Password Includes a Digit" }; if (/\\s/.test(pwd)) return { valid: false, message: "Please only use visible characters" }; return { valid: true, message: "Valid Password" }; } console.log(testPassword('Val1dPassword')); console.log(testPassword('SH0rt')); console.log(testPassword('No2capitals')); console.log(testPassword('NoDigits')); console.log(testPassword('Has\\tat least 1 WhiteSpace'));

Then your function can be simplified.

function validera() {
    let passw = document.getElementById("User-Password").value;
    let check = testPassword(passwd);
    if (check.valid) {
        alert(check.message);
        return false;
    }
     else {
        alert("Account created")
    }
  }