generate and shuffle a deck

function createDeck() {
        var suits = ['c','s','h','d']
        var values = ['A','2','3','4','5','6','7','8','9','10','j','q','k']
        var deck = []
        for(s in suits) {
                for(v in values) {
                        deck.push(values[v] + suits[s])
                }
        }
        deck.push('j1')
        deck.push('j2')
        return deck
}

function shuffleDeck(array) {
  let currentIndex = array.length,  randomIndex;
  while (currentIndex != 0) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex--;
    [array[currentIndex], array[randomIndex]] = [
      array[randomIndex], array[currentIndex]];
  }
  return array;
}

var deck = createDeck()

console.log(shuffleDeck(deck))