随机密码生成器Javascript不起作用

var length = Number(prompt("How many characters would you like your password to be?"));
while (isNaN(length) || length < 8 || length > 128) length = Number(prompt("Length must be 8-128 characters. How many characters would you like your password to be?"));

var uppers = confirm("Would you like to use uppercase letters?");
var lowers = confirm("Would you like to use lowercase letters?");
var numbers = confirm("Would you like to use numbers?");
var symbols = confirm("Would you like to use special characters?");

while (!uppers && !lowers && !numbers && !symbols) {
  alert("You must select at least one character type!");
  uppers = confirm("Would you like to use uppercase letters?");
  lowers = confirm("Would you like to use lowercase letters?");
  numbers = confirm("Would you like to use numbers?");
  symbols = confirm("Would you like to use special characters?");
}

window.addEventListener('load', function() {
  generateNewPassword();
});

function generateNewPassword() {
  var password = "";

  var allowed = {};
  if (uppers) password += rando(allowed.uppers = "QWERTYUIOPASDFGHJKLZXCVBNM");
  if (lowers) password += rando(allowed.lowers = "qwertyuiopasdfghjklzxcvbnm");
  if (numbers) password += rando(allowed.numbers = "1234567890");
  if (symbols) password += rando(allowed.symbols = "!@#$%^&*(){}[]=<>/,.");

  for (var i = password.length; i < length; i++) password += rando(rando(allowed).value);

  document.getElementById("password").value = randoSequence(password).join("");
}

<script src="https://randojs.com/1.0.0.js"></script>
<input type="text" id="password"/>
<button onclick="generateNewPassword();">Generate new password</button>

window.addEventListener('load', function() {
  var plength = prompt("How many characters would you like your password to be?");

  while (plength < 8 || plength > 128) {
    plength = prompt("Length must be 8-128 characters. How many characters would you like your password to be?");
  }

  var cuppercase = confirm("Would you like to use uppercase letters?");
  var clowercase = confirm("Would you like to use lowercase letters?");
  var cnumbers = confirm("would you like to use numbers?");
  var csymbols = confirm("would you like to use special characters?");

  while (!(cuppercase || clowercase || cnumbers || csymbols)) {
    alert("You must select at least one character type!");

    cuppercase = confirm("Would you like to use uppercase letters?");
    clowercase = confirm("Would you like to use lowercase letters?");
    cnumbers = confirm("would you like to use numbers?");
    csymbols = confirm("would you like to use special characters?");
  }

  //DOM elements
  const resultEl = document.getElementById('password');

  document.getElementById('generate').addEventListener('click', () => {
    resultEl.value = generatePassword(clowercase, cuppercase, cnumbers, csymbols, plength);
  });

  document.getElementById('clipboard').addEventListener('click', () => {
    const textarea = document.createElement('textarea');
    const password = resultEl.value;

    if (!password) {
      return;
    }

    textarea.value = password;
    document.body.appendChild(textarea);
    textarea.select();
    document.execCommand('copy');
    textarea.remove();
    alert('Password copied to clipboard');
  });
});


const randomFunc = {
  lower: getRandomLower,
  upper: getRandomUpper,
  number: getRandomNumber,
  symbol: getRandomSymbol
};

function generatePassword(lower, upper, number, symbol, length) {
  let generatedPassword = '';
  const typesCount = lower + upper + number + symbol;
  const typesArr = [{
    lower
  }, {
    upper
  }, {
    number
  }, {
    symbol
  }].filter(item => Object.values(item)[0]);

  // create a loop
  for (let i = 0; i < length; i += typesCount) {
    typesArr.forEach(type => {
      const funcName = Object.keys(type)[0];
      generatedPassword += randomFunc[funcName]();
    });
  }

  const finalPassword = generatedPassword.slice(0, length);

  return finalPassword;
}

// Generator functions
function getRandomLower() {
  return rando("qwertyuiopasdfghjklzxcvbnm")
}

function getRandomUpper() {
  return rando("QWERTYUIOPASDFGHJKLZXCVBNM");
}

function getRandomNumber() {
  return rando(9);
}

function getRandomSymbol() {
  return rando('!@#$%^&*(){}[]=<>/,.');
}

<html>
  <head>
    <script src="https://randojs.com/1.0.0.js"></script>
  </head>
  <body>
    <header>
      <h1 class="text-center" style="margin-top: 20px;">Password Generator</h1>
    </header>
    <div class="card shadow-sm p-3 mb-5 bg-white rounded" style="max-width: 60%; margin: 40px auto;">
      <div class="card-body">
        <h2 class="card-title">Generate a Password</h2>
        <textarea style="width: 100%; text-align:center; resize:none; border: dashed 2px lightgrey; margin:30px auto; padding: 10px auto; min-height: 100px;" readonly id="password" placeholder="Your Secure Password" aria-label="Generated Password"></textarea>
        <button type="button" class="btn btn-danger" id="generate" style="float:left; border-radius:40px; padding-right: 30px; padding-left: 30px;">Generate Password</button>
        <button type="button" class="btn btn-light" id="clipboard" style="float:right;  border-radius:40px; padding-right: 30px; padding-left: 30px; background-color: silver; color:white">Copy to clipboard</button>
      </div>
    </div>
  </body>
</html>