Backjack in JS OOP

blackjack.js

const _ = require('lodash');

/*
 * Card
 */

class Card {

    constructor(game, deck, options) {
       this.game = game;
       this.deck = deck;

        // TODO: move game descriptions to a config file 
       if (game === "BLACKJACK") {
            //CARDS in blackjack have Suits defined by the SUIT enum. 
            //Only one suit and number is allowed per dec
            //WHICH HAS 4 SUITS

            //Get number of cards left. Cards in 52 deck have 
            //  face value and suit and color
//            console.log(options.face_value, options.suit);

            if (!options || !options.suit || !options['face_value']) {
               throw new Error(`Missing suit or face_value`);
            } else {
                this.suit = options.suit;
                this.value = options.face_value;
            } 
             
                   
       } else {
            throw new Error(`${game} is not supported, yet`);
       }
 

    }

    get color() {
        // TODO: abstract out to a descriptor class 
        if (this.suit == "SPADE" || this.suit == "CLOVER") {
            return "BLACK"   
        } else {
            return "RED"
        }
    }

}

/*
 * Deck
 */

class Deck {

    constructor(game) {

        this.game = game;
        this._cards = [];

       if (game === "BLACKJACK") {
            //BLACK JACK IS PLAYED WITH A DECK OF 52 CARDS 
            //WHICH HAS 4 SUITS

               _.each(["SPADE", "HEART", "CLOVER", "DIAMOND"], (suit) => {

                   _.times(13, (face_value) => {
                       this.createCard({
                           suit: suit,
                           face_value: face_value + 1
                       });
                   });

               });
          
       } else {
            throw new Error(`${game} is not supported, yet`);
       }
        

    }

    get cards() {
        return this._cards 
    }

    get length() {
        return this._cards.length
    }

    createCard(options) {

//       console.log(`Create (${this.length}) card for the same game ${this.game} with ${options}`);
       let card = new Card(this.game, this, options);
       this.cards.push(card);

    }

    PickCard() {

        if (this.length > 0 ) {
            var idx = Math.floor(Math.random()*this.length);
            return this.cards.splice(idx, 1)[0];
        }
    }

}


class BlackJackHand {


    constructor(player) {
        this.cards = [];
        this.player = player
    }

    addCard(card) {
        // TODO: Check Card is of type CARD
        this.cards.push(card);
        this.checkScore();

    }

    checkScore() {

        if (this.isBust) {
           console.log(`Game Over, ${this.player} busted`);
        }

        if (this.isBlackJack) {
           console.log(`Game Over, ${this.player} Won!`);

        }
    }

    get isGameOver() {
        return this.isBust || this.isBlackJack;
    }

    get score() {
        var score = 0;

        _.each(this.cards, (card) => { 
                //console.log(card, score, "FACE", card.value);
                score = score + card.value;     
        });

//        console.log(`${this.player} score: ${score} `);
        return score;
    }

    get isBust() {
        return this.score > 21;
    }

    get isBlackJack() {
        return this.score == 21;
    }   
}



var blackJackDeck = new Deck("BLACKJACK");

var playerHand = new BlackJackHand("Player");

var dealerHand = new BlackJackHand("Dealer");

while(!(playerHand.isGameOver || dealerHand.isGameOver)) {

    if (blackJackDeck.length > 0) {
        var dealerCard = blackJackDeck.PickCard();
        dealerHand.addCard(dealerCard);
        console.log(`Dealer's card is: ${dealerCard.value} of ${dealerCard.suit} and score is ${dealerHand.score}`);

        var playerCard = blackJackDeck.PickCard();
        playerHand.addCard(playerCard);
        console.log(`player's card is: ${playerCard.value} of ${playerCard.suit} and score is ${playerHand.score}`);
    } else {
        console.log('Out of cards, tie!');
    }


}

package.json

 {
   "name": "bj",
   "version": "1.0.0",
   "description": "",
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
     "lodash": "^4.17.4"
   }
 }