Retrieve missing credit cards digits - BRUTE FORCE

/**
 * You lost some of your CC digits ? Let's try
 *
 * TESTED ONLY WITH VISA
 * IT DOES NOT REQUIRE EXPIRATION DATE and CVV
 *
 * This program has been created
 * for assisting you and your memory to recover missing digits of your credit card.
 * It helped me to order a pizza when I left my cc somewhere else.
 *
 * If you forget :
 * - 1 digit you'll get only one result, your Credit Card results.
 * - 2 digit you'll get approximately ~10 Credit Card results.
 * - 3 digit you'll get approximately ~100 Credit Card results.
 * - +4 digit you'll get approximately +1000 Credit Card results.
 *
 * Let's try with your own.
 */
var card = '4974111111111xx11';
var results = generateValidCC(card, 'x', 10e5);

console.log(results);

/**
 * Returns an array of valid credit card digit.
 * Dynamic placeholder for random digit,
 * and place the x where you want in the CC digit
 *
 * Ex:  497411111xxx1111
 *      49xx111111111111
 *      4xxxx11111111111
 *      411111111111x111
 *      411111xxx1111111
 *
 * @param ccNumber '11111111xxxx1111'
 * @param placeholder 'x'
 * @param maxTry 10e4
 *
 * @returns {string[]}
 */
function generateValidCC(ccNumber, placeholder = null, maxTry = 10e4) {
  if(!ccNumber || !placeholder) {
    throw new TypeError('No ccNumber or placeholder given');
  }

  const ccArr = [];
  const xAmount = (ccNumber.split(placeholder).length - 1);
  var i = 0;

  if (xAmount <= 0 ) {
    throw new TypeError('No placeholder found in ccNumber');
  }

  while (i < maxTry) {
    const rndCard = ccNumber.replace(placeholder.repeat(xAmount), random(xAmount));
    const cValid = isValid(rndCard);
    if (cValid && ccArr.indexOf(rndCard) === -1) {
      ccArr.push(rndCard);
    }
    i++;
  }
  return ccArr;
}

function getRandomIntInclusive(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function random(length) {
  var output = '';
  var i = 0;
  while (i < length) {
    output += getRandomIntInclusive(0, 9);
    i++;
  }
  return output;
}

/**
 * Luhn Algorithm
 * @see https://en.wikipedia.org/wiki/Luhn_algorithm
 */
function isValid(ccNumber) {
  var sum = 0;
  var alternate = false;
  var i = ccNumber.length - 1;
  while (i >= 0) {
    var n = parseInt(ccNumber.substring(i, i + 1));
    if (alternate) {
      n *= 2;
      if (n > 9) {
        n = (n % 10) + 1;
      }
    }
    sum += n;
    alternate = !alternate;
    i--;
  }
  return (sum % 10 == 0);
};