MemoryGame/main.js at master · RanaShiva/MemoryGame · GitHub

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document.addEventListener('DOMContentLoaded', () => {
  //card options
  const cardArray = [
    {
      name: 'fries',
      img: 'images/fries.png'
    },
    {
      name: 'cheeseburger',
      img: 'images/cheeseburger.png'
    },
    {
      name: 'ice-cream',
      img: 'images/ice-cream.png'
    },
    {
      name: 'pizza',
      img: 'images/pizza.png'
    },
    {
      name: 'milkshake',
      img: 'images/milkshake.png'
    },
    {
      name: 'hotdog',
      img: 'images/hotdog.png'
    },
    {
      name: 'fries',
      img: 'images/fries.png'
    },
    {
      name: 'cheeseburger',
      img: 'images/cheeseburger.png'
    },
    {
      name: 'ice-cream',
      img: 'images/ice-cream.png'
    },
    {
      name: 'pizza',
      img: 'images/pizza.png'
    },
    {
      name: 'milkshake',
      img: 'images/milkshake.png'
    },
    {
      name: 'hotdog',
      img: 'images/hotdog.png'
    }
  ]

  cardArray.sort(() => 0.5 - Math.random());

  const grid = document.querySelector('.grid');
  const resultDisplay = document.querySelector('#result');
  var cardsChosen = [];
  var cardsChosenId = [];
  const cardsWon = [];

  //create your board
  function createBoard()
  {
    for (let i = 0; i < cardArray.length; i++)
    {
      var card = document.createElement('img');
      card.setAttribute('src', 'images/blank.png');
      card.setAttribute('data-id', i);
      card.addEventListener('click', flipCard);
      grid.appendChild(card);
    }
  }

  //check for matches
  function checkForMatch() {
    var cards = document.querySelectorAll('img');
    const optionOneId = cardsChosenId[0];
    const optionTwoId = cardsChosenId[1];
    if (cardsChosen[0] === cardsChosen[1])
    {
      cards[optionOneId].setAttribute('src', 'images/white.png');
      cards[optionTwoId].setAttribute('src', 'images/white.png');
      cardsWon.push(cardsChosen[0]);
    }
    else
    {
      cards[optionOneId].setAttribute('src', 'images/blank.png');
      cards[optionTwoId].setAttribute('src', 'images/blank.png');
    }
    cardsChosen = [];
    cardsChosenId = [];
    resultDisplay.textContent = cardsWon.length;
    if(cardsWon.length === cardArray.length/2)
    {
      document.getElementsByTagName("h2")[0].textContent = 'Congratulations! You found them all!';
      document.getElementsByTagName("div")[1].style.display = "none";
	  document.getElementsByTagName("button")[1].style.display = "block";
    }
  }

  //flip your card
  function flipCard()
  {
    var cardId = this.getAttribute('data-id');
    cardsChosen.push(cardArray[cardId].name);
    cardsChosenId.push(cardId);
    if(cardsWon.indexOf(cardsChosen[0]) == -1)
    {
   	    this.setAttribute('src', cardArray[cardId].img);
	}
	else
	{
		cardsChosen.pop();
        cardsChosenId.pop();
	}
    if (cardsChosen.length ===2)
    {
    	if(cardsChosenId[0]===cardsChosenId[1])
    	{
    		cardsChosen.pop();
    		cardsChosenId.pop();
    	}
      setTimeout(checkForMatch, 250);
    }
  }

  createBoard();
})