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HTML

            
              <html>
    <head>
        <title>TIC TAC TOE</title>
    </head>
    <body>
        <div class="container">
            <h1>Tic-Tac-Toe</h1>
            <ul id="game">
                <!-- first row -->
                <li data-pos="0,0"></li>
                <li data-pos="0,1"></li>
                <li data-pos="0,2"></li>
                <!-- second row -->
                <li data-pos="1,0"></li>
                <li data-pos="1,1"></li>
                <li data-pos="1,2"></li>
                <!-- third row -->
                <li data-pos="2,0"></li>
                <li data-pos="2,1"></li> 
                <li data-pos="2,2"></li>
            </ul>
            
            <button id="reset-game">Reset Game</button>
            
            <!-- Game Messages -->
            <div id="game-messages">
                <span class="player-x-win">Player One Wins</span>
                <span class="player-o-win">Player Two Wins</span>
                <span class="draw">Draw Game</span>
            </div>
            
            <aside id="nfo">
                <h2>Who's Turn</h2>
                <div id="whos-turn" class="x">
                    <span class="x">Player 1</span>
                    <span class="o">Player 2</span>
                </div>
                
                <h2>Score Card</h2>
                <div id="score">
                    Player 1: <span id="player-one-score">0</span> <br />
                    Player 2: <span id="player-two-score">0</span> <br />
                </div>
            </aside>
        </div>
    </body>
</html>
            
          
!

CSS

            
              body {
    margin-top: 40px;
    background: #485b6e;
        color: #fff;
        font-family: Helvetica;
    font-weight: bold;
    text-align:center;
}

h1 {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #f1f1f1
    
}
.container {
    margin: 0 auto;
    width: 400px;
}

#game {
    width: 300px;
    height: 300px;
    border: 1px solid #dadada;
    margin: 0 auto;
    padding: 0;
    margin-bottom: 20px;
}

#game > li {
    list-style: none;
    float: left;
    overflow: hidden;
    text-decoration:none;
    width: 100px;
    height: 100px;
    background: #f1f1f1;
    border: 1px solid #ccc;
    border-right: 1px solid #fff;
    cursor: pointer;
    text-transform: uppercase;
    text-align: center;
    padding-top: 20px;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

#game > li.x {
    font-size: 40px;
    color: #ed4e6e
}

#game > li.o {
    font-size: 40px;
    color: #485b6e;
}

#game > li:hover {
    background: #f9f9f9;
}

#game > li:active {
    width: 100px;
    height: 100px;
    border: 0;
}

#nfo {
    text-align:center;
    margin-top: 10px;
}

#whos-turn > span,
#game-messages > span {
    display: none;
}

#whos-turn.x span.x,
#whos-turn.o span.o, 
#game-messages.player-x-win > span.player-x-win, 
#game-messages.player-o-win > span.player-o-win,
#game-messages.draw > span.draw {
    display: block;
    margin-top: 10px;
}

#reset-game {
    text-align: center;
        border: none;
        padding: 0.6em 1.2em;
        background: #ed4e6e;
        color: #fff;
        font-size: 1em;
        letter-spacing: 1px;
        text-transform: uppercase;
        cursor: pointer;
        display: inline-block;
        margin: 3px 2px;
        border-radius: 2px;
}

#reset-game:hover {
        background: #2c3e52;
}
            
          
!

JS

            
              (function Game() {
    // Elements
    var game = document.getElementById('game');
    var boxes = document.querySelectorAll('li');
    var resetGame = document.getElementById('reset-game');
    var turnDisplay = document.getElementById('whos-turn');
    var gameMessages = document.getElementById('game-messages');
    var playerOneScoreCard = document.getElementById('player-one-score');
    var playerTwoScoreCard = document.getElementById('player-two-score');
    
    // Vars
    var context = { 'player1' : 'x', 'player2' : 'o' };
    var board = [];
    
    var playerOneScore = 0;
    var playerTwoScore = 0;
    
    var turns;
    var currentContext;
    
    // Constructor
    var init = function() {
        turns = 0;
        
        // Get current context
        currentContext = computeContext();
        
        // Setup 3 x 3 board 
        board[0] = new Array(3);
        board[1] = new Array(3);
        board[2] = new Array(3);
        
        // bind events
        for(var i = 0; i < boxes.length; i++) {
            boxes[i].addEventListener('click', clickHandler, false);
        }
        
        resetGame.addEventListener('click', resetGameHandler, false);
    }
    
    //Keeps track of player's turn
    var computeContext = function() {
        return (turns % 2 == 0) ? context.player1 : context.player2;
    }
    
    // Bind the dom element to the click callback
    var clickHandler = function() {
        this.removeEventListener('click', clickHandler);
        
        this.className = currentContext;
        this.innerHTML = currentContext;
        
        var pos = this.getAttribute('data-pos').split(',');
        board[pos[0]][pos[1]] = computeContext() == 'x' ? 1 : 0;
        
        if(checkStatus()) {
            gameWon();
        }
        
        turns++;
        currentContext = computeContext();
        turnDisplay.className = currentContext;
    }
    
    
    // Check to see if player has won
    var checkStatus = function() {
        var used_boxes = 0;
        
        for(var rows = 0; rows < board.length; rows++ ) {
            var row_total = 0;
            var column_total = 0;
            
            for(var columns = 0; columns < board[rows].length; columns++) {
                row_total += board[rows][columns];
                column_total += board[columns][rows];
                
                if(typeof board[rows][columns] !== "undefined") {
                    used_boxes++;
                }
            }
            
            // Winning combination for diagonal scenario [0,4,8], [2,4,6]
            var diagonal_tl_br = board[0][0] + board[1][1] + board[2][2]; // diagonal top left to bottom right
            var diagonal_tr_bl = board[0][2] + board[1][1] + board[2][0]; // diagonal top right bottom left
            
            if(diagonal_tl_br == 0 || diagonal_tr_bl == 0 || diagonal_tl_br == 3 || diagonal_tr_bl == 3) {
                return true;
            }
            
            // Winning combination for row [0,1,2], [3,4,5], [6,7,8]
            // Winning combination for column [0,3,6], [1,4,7], [2,5,8]
            // Only way to win is if the total is 0 or if the total is 3. X are worth 1 point and O are worth 0 points
            if(row_total == 0 || column_total == 0 || row_total == 3 || column_total == 3) {
                return true;
            }
            
            // if all boxes are full - Draw!!!
            if(used_boxes == 9) {
                gameDraw();
            }
        }
    }
    var gameWon = function() {
        clearEvents();
        
        // show game won message
        gameMessages.className = 'player-' + computeContext() + '-win';
        
        // update the player score
        switch(computeContext()) {
            case 'x':
                playerOneScoreCard.innerHTML = ++playerOneScore;
                break;
            case 'o':
                playerTwoScoreCard.innerHTML = ++playerTwoScore;
        }
    }
    // Tells user when game is a draw.
    var gameDraw = function() {
        gameMessages.className = 'draw';
        clearEvents();
    }
    
    // Stops user from clicking empty cells after game is over
    var clearEvents = function() {
        for(var i = 0; i < boxes.length; i++) {
            boxes[i].removeEventListener('click', clickHandler);
        }
    }
    // Reset game to play again
    var resetGameHandler = function() {
        clearEvents();
        init();
        
        // Go over all the li nodes and remove className of either x,o
        // clear out innerHTML
        for(var i = 0; i < boxes.length; i++) {
            boxes[i].className = '';
            boxes[i].innerHTML = '';
        }
        
        // Change Who's turn class back to player1
        turnDisplay.className = currentContext;
        gameMessages.className = '';
    }
    
    game && init();
})();
            
          
!
999px

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