Validate credit card number

ValidateCreditCardNumber.js

/* cardNumber
 * Recibe numero de tarjeta en int o str
 * Return the true or false.
 */

function cardNumber(num) {
  num = num.toString();
  console.log('\nIn Function ' + num);
  var visa = /^(?:4[0-9]{12}(?:[0-9]{3})?)$/;
  var mast = /^(?:5[1-5][0-9]{14})$/;
  var amex = /^(?:3[47][0-9]{13})$/;
  var disc = /^(?:6(?:011|5[0-9][0-9])[0-9]{12})$/;
  var dine = /^(?:3(?:0[0-5]|[68][0-9])[0-9]{11})$/;
  var jcb = /^(?:(?:2131|1800|35\d{3})\d{11})$/;
  
  if(luhn_checksum(num) === true){
    if (num.match(visa)) console.log('VISA');
    if (num.match(mast)) console.log('MASTER');
    if (num.match(amex)) console.log('AMEX');
    if (num.match(disc)) console.log('DISC');
    if (num.match(dine)) console.log('Dinners');
    if (num.match(jcb)) console.log('JCB');
  }else{
    console.log("Número No valido");
    return "Numero No valido"
  }
}


//Testing
cardNumber(5200828282828210)// Master
cardNumber('5555555555554444')// Amex
cardNumber('371449635398431')// Discover
cardNumber('6011000990139424')// Dinners
cardNumber('30569309025904')// JCB
cardNumber('3530111333300000')/*


/* luhn_checksum
 * Implement the Luhn algorithm to calculate the Luhn check digit.
 * Return the true or false.
 */
function luhn_checksum(code) {
  var len = code.length
  var parity = len % 2
  var sum = 0
  for (var i = len - 1; i >= 0; i--) {
    var d = parseInt(code.charAt(i))
    if (i % 2 == parity) {
      d *= 2
    }
    if (d > 9) {
      d -= 9
    }
    sum += d
  }
  return sum % 10 === 0 ? true : false;
}