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JavaScript project: memory card game

A fun and interactive Javascript project game that puts players’ memory skills to the test is the Memory Card Game project. Matching pairs of cards with similar symbols within a grid is the game’s goal. It’s a timeless game that challenges your memory and attention while also being fun to play.

So let's get started and have fun creating our very own Memory Card Game!

JavaScript code

// Array of card symbols
const cardSymbols = [
  '🐶', '🐱', '🐭', '🐹', '🐰', '🦊', '🐻', '🐼',
  '🐯', '🦁', '🐮', '🐷', '🐸', '🐵', '🐔', '🐧'
];

// Create a new shuffled deck of cards
const createDeck = () => {
  const deck = [...cardSymbols, ...cardSymbols];
  for (let i = deck.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [deck[i], deck[j]] = [deck[j], deck[i]];
  }
  return deck;
};

// Global variables
let deck = [];
let flippedCards = [];
let matchedCards = [];
let isBoardLocked = false;

// Function to handle card click
const handleCardClick = (index) => {
  if (isBoardLocked || matchedCards.includes(index) || flippedCards.includes(index)) {
    return;
  }
  
  const card = document.getElementById(`card-${index}`);
  card.classList.add('flipped');
  flippedCards.push(index);
  
  if (flippedCards.length === 2) {
    isBoardLocked = true;
    const [card1, card2] = flippedCards;
    
    if (deck[card1] === deck[card2]) {
      matchedCards.push(card1, card2);
      if (matchedCards.length === deck.length) {
        setTimeout(() => {
          alert('Congratulations! You won the game!');
        }, 500);
      }
    } else {
      setTimeout(() => {
        const card1Elem = document.getElementById(`card-${card1}`);
        const card2Elem = document.getElementById(`card-${card2}`);
        card1Elem.classList.remove('flipped');
        card2Elem.classList.remove('flipped');
        flippedCards = [];
        isBoardLocked = false;
      }, 1000);
    }
  }
};

// Function to create the game board
const createGameBoard = () => {
  const gameBoard = document.getElementById('game-board');
  deck = createDeck();

  deck.forEach((symbol, index) => {
    const card = document.createElement('div');
    card.className = 'card';
    card.id = `card-${index}`;
    card.addEventListener('click', () => handleCardClick(index));
    
    const front = document.createElement('div');
    front.className = 'front';
    
    const back = document.createElement('div');
    back.className = 'back';
    back.innerHTML = symbol;
    
    card.appendChild(front);
    card.appendChild(back);
    gameBoard.appendChild(card);
  });
};

// Initialize the game board
createGameBoard();

HTML code

<!DOCTYPE html>
<html>
<head>
  <title>Memory Card Game</title>
  <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
  <div class="game-board">
    <!-- Cards will be dynamically generated here -->
  </div>

  <script src="script.js"></script>
</body>
</html>

In this HTML code, we have a basic structure for the Memory Card Game. The game board will be dynamically generated inside the <div class="game-board"> element. We link an external CSS file (styles.css) to style the game and an external JavaScript file (script.js) to handle the game logic.

CSS code

.game-board {
  display: flex;
  flex-wrap: wrap;
  max-width: 420px;
  margin: 0 auto;
}

.card {
  width: 100px;
  height: 100px;
  margin: 5px;
  background-color: #ddd;
  border-radius: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 40px;
  cursor: pointer;
}

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