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CSS

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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <div id="errors" style="
  background: #c00;
  color: #fff;
  display: none;
  margin: -20px -20px 20px;
  padding: 20px;
  white-space: pre-wrap;
"></div>
<div id="root"></div>
<script>
window.addEventListener('mousedown', function(e) {
  document.body.classList.add('mouse-navigation');
  document.body.classList.remove('kbd-navigation');
});
window.addEventListener('keydown', function(e) {
  if (e.keyCode === 9) {
    document.body.classList.add('kbd-navigation');
    document.body.classList.remove('mouse-navigation');
  }
});
window.addEventListener('click', function(e) {
  if (e.target.tagName === 'A' && e.target.getAttribute('href') === '#') {
    e.preventDefault();
  }
});
window.onerror = function(message, source, line, col, error) {
  var text = error ? error.stack || error : message + ' (at ' + source + ':' + line + ':' + col + ')';
  errors.textContent += text + '\n';
  errors.style.display = '';
};
console.error = (function(old) {
  return function error() {
    errors.textContent += Array.prototype.slice.call(arguments).join(' ') + '\n';
    errors.style.display = '';
    old.apply(this, arguments);
  }
})(console.error);
</script>

            
          
!

CSS

            
              body {
  font: 14px "Century Gothic", Futura, sans-serif;
  margin: 20px;
}

ol, ul {
  padding-left: 30px;
}

.board-row:after {
  clear: both;
  content: "";
  display: table;
}

.status {
  margin-bottom: 10px;
}

.square {
  background: #fff;
  border: 1px solid #999;
  float: left;
  font-size: 24px;
  font-weight: bold;
  line-height: 34px;
  height: 34px;
  margin-right: -1px;
  margin-top: -1px;
  padding: 0;
  text-align: center;
  width: 34px;
}

.square.is-success {
  background: lightgreen;
  border-color: darkgreen;
}

.square:focus {
  outline: none;
}

.kbd-navigation .square:focus {
  background: #ddd;
}

.game {
  display: flex;
  flex-direction: row;
}

.game-info {
  margin-left: 20px;
}

.is-bold {
  font-weight: bold;
}
            
          
!

JS

            
              function Square(props) {
  return (
    <button 
      className={"square " + props.extraClass}
      onClick={props.onClick}
      >
      {props.value}
    </button>
  ); 
}

class Board extends React.Component {
  renderSquare(i) {
    return <Square 
             value={this.props.squares[i]} 
             extraClass='is-success'
             onClick={() => this.props.onClick(i)}
           />;
  }
  
  createBoardDivs() {
    let divs = [];
    
    for (let i = 0; i < 3; i++) {
      let children = []

      for (let j = 0; j < 3; j++) {
        children.push(<span key={3*i+j}>{this.renderSquare(3*i+j)}</span>)
      }

      divs.push(<div key={i} className="board-row">{children}</div>)
    }
    
    return divs;
  }

  render() {
    return (
      <div>
        {this.createBoardDivs()}
      </div>
    );
  }
}

class Game extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      history: [{
        squares: Array(9).fill(null)
      }],
      stepNumber: 0,
      clickedSquare: [],
      xIsNext: true,
      winningTriplet: []
    }
  }
  
  handleClick(i) {
    const history = this.state.history.slice(0, this.state.stepNumber + 1);
    const current = history[history.length - 1];
    const squares = current.squares.slice();
    const clickedSquare = this.state.clickedSquare.slice(0, this.state.stepNumber);
    if (this.calculateWinner(squares) || squares[i]) {
      return;
    }
    squares[i] = this.state.xIsNext ? "X" : "O";
    this.setState({ 
      history: history.concat([{
        squares: squares
      }]),
      stepNumber: history.length,
      clickedSquare: clickedSquare.concat(i),
      xIsNext: !this.state.xIsNext,
      isMovesReverse: false
    });
  }
  
  jumpTo(step) {
    this.setState({
      stepNumber: step,
      xIsNext: (step % 2) === 0
    });
  }
  
  sortMoves(moves) {
    this.setState({
      isMovesReverse: !this.state.isMovesReverse
    })
  }
  
  createMoves(history) {
    const moves = history.map((step,move) => {
      const clickedSquare = this.state.clickedSquare[move-1];
      const row = Math.floor(clickedSquare / 3);
      const col = clickedSquare - (row * 3); 
      const desc = move ?
            "Go to move #" + move + " (" + (row+1) + "," + (col+1) + ")": 
            "Go to game start";
      const extraClassBold = (move === this.state.stepNumber) ?
            "is-bold":
            "";
      return (
        <li key={move}>
          <button onClick={() => this.jumpTo(move)} className={extraClassBold}>{desc}</button>
        </li>
      );
    });
    
    return (this.state.isMovesReverse) ? moves.reverse() : moves;
  }
  
  calculateWinner(squares) {
    const lines = [
      [0, 1, 2],
      [3, 4, 5],
      [6, 7, 8],
      [0, 3, 6],
      [1, 4, 7],
      [2, 5, 8],
      [0, 4, 8],
      [2, 4, 6],
    ];
    for (let i = 0; i < lines.length; i++) {
      const [a, b, c] = lines[i];
      if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
        return squares[a];
      }
    }
    return null;
  }
  
  render() {
    const history = this.state.history;
    const current = history[this.state.stepNumber];
    const winner = this.calculateWinner(current.squares);

    const moves = this.createMoves(history);
    
    let status;
    if (winner) {
      status = "Winner: " + winner;
    } else {
      status = "Next player: " + (this.state.xIsNext ? "X" : "O");
    }
    
    return (
      <div className="game">
        <div className="game-board">
          <Board 
            squares={current.squares}
            onClick={(i) => this.handleClick(i)}
          />
        </div>
        <div className="game-info">
          <div>{status}</div>
          <button onClick={() => this.sortMoves()}>Toggle</button>
          <ol>{moves}</ol>
        </div>
      </div>
    );
  }
}

// ========================================

ReactDOM.render(
  <Game />,
  document.getElementById('root')
);

            
          
!
999px

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