Długość hasła

HTML:

<div class="passwordWrapper">
        <label for="passwordField">Twoje nowe hasło</label>
        <input type="password" id="passwordField" placeholder="Wpisz tutaj hasło...">
        <progress id="passwordComplexity" value="0"></progress>
</div>

JS:

var calculateComplexity = function(password){
    var complexity = 0;
    var regExps = [
        /[a-z]/,    // litery od a-z
        /[A-Z]/,    // litery od A-Z
        /[0-9]/,    // liczby od 0-1
        /.{8}/,     // min wyamagana liczba znaków - 8        
        /.{16}/,    // max liczba znaków - 16
        /[!-//:-@[-`{-ÿ]/ // znaki specjalne
    ];

    regExps.forEach(function(regexp){
        if(regexp.test(password)){
            complexity++;
        }
    });

        return{
            value: complexity,
            max: regExps.length
         };
    };

    var checkPasswordStregth = function (password){
        var progress = document.querySelector('#passwordComplexity'),
            complexity = calculateComplexity(this.value);

        progress.value = complexity.value;
        progress.max = complexity.max;
    };
    
    var input = document.querySelector('#passwordField');
    input.addEventListener('keyup',checkPasswordStregth);