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HTML

              
                
              
            
!

CSS

              
                $color-light-gray: #ecf0f1;
$color-medium-gray: #bdc3c7;
$color-dark-gray: #34495e;
$color-light-green: #1abc9c;
$color-medium-green: #16a085;

html, body {
  width: 100%;
  height: 100%;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 900px;
  background-color: $color-light-gray;
  font-family: Roboto;
  overflow: hidden;
}

.game {
  position: relative;
  display: flex;
  width: 80vmin;
  height: 80vmin;
  transform: rotateY(0deg);
  transform-style: preserve-3d;
  transition: all 1s ease-out;
  
  &.rotated {
    transform: rotateY(180deg);
  }
  
  .line {
    position: absolute;
    width: 76%;
    height: 76%;
    transform: translateZ(6vmin);
    top: 12%;
    left: 12%;
    pointer-events: none;
    
    &.visible {
      path {
        stroke-dashoffset: 0px;
      }
    }
    
    path {
      stroke-width: 10px;
      stroke-dashoffset: 141.42px; // The size of the diagonal
      stroke-dasharray: 141.42px;
      stroke: $color-light-gray;
      transition: stroke-dashoffset 1.5s cubic-bezier(0.4,0,0.2,1);
    }
  }
  
  .board {
    display: flex;
    flex-direction: column;
    flex: 1;
    
    .row {
      display: flex;
      flex: 1;
      margin-bottom: 2%;
      justify-content: space-between;

      &:last-child {
        margin-bottom: 0;
      }
    }
  }
}

.results {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  transform: translateZ(-6vmin) rotateY(-180deg);
  background-color: white;
  backface-visibility: hidden;
  transform-origin: bottom;
  
  .message {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 10vmin;
    
    .symbol {
      display: flex;
      height: 35vmin;
      
      svg {
        flex: 1;
      }
    }
    
    .text {
      font-size: 32px;
      text-transform: uppercase;
      flex: 0 0 10vmin;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  }
  
  .replay {
    height: 15vmin;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: $color-dark-gray;
    color: white;
    font-size: 5vmin;
    text-transform: uppercase;
    cursor: pointer;
    
    &:hover {
      background-color: rgba($color-dark-gray, 0.7);
    }
  }
}

.pawn path {
  stroke: $color-dark-gray; 
  stroke-dasharray: 301.635; 
  stroke-dashoffset: 0;
  fill: none;
  stroke-width: 16px;
}

.cube {
  flex: 0 0 32%;
  position: relative;
  transform: rotateY(0deg);
  transition: all 0.5s ease-out;
  cursor: pointer;
  
  &.rotated {
    transform: rotateY(180deg);
  }
  
  div {
    position: absolute;
    background-color: $color-light-green;
    box-shadow: inset 0 0 0 1vmin rgba($color-dark-gray, 0.2);
    width: 100%;
    height: 100%;
    
    svg {
      width: 80%;
      height: 80%;
      
      path {
        stroke: $color-dark-gray; 
        stroke-dasharray: 301.635; 
        stroke-dashoffset: 0;
        fill: none;
        stroke-width: 16px;
        transition: stroke-dashoffset 1.225s cubic-bezier(0.4,0,0.2,1);
      }
    }
    
    &.back {
      transform: translateZ(-5vmin);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20vmin;
    } 
    
    &.front {
      transform: translateZ(5vmin) rotateY(180deg);
    }
    
    &.right {
      transform-origin: right;
      transform: translateZ(5vmin) rotateY(270deg);
      width: 10vmin;
      right: 0;
      background-color: $color-dark-gray;
    }
    
    &.left {
      transform-origin: left;
      transform: translateZ(5vmin) rotateY(90deg);
      width: 10vmin;
      background-color: $color-dark-gray;
    }
    
    &.bottom {
      transform-origin: bottom;
      transform: translateZ(5vmin) rotateX(90deg);
      height: 10vmin;
      bottom: 0;
      background-color: $color-dark-gray;
    }
    
    &.top {
      transform-origin: top;
      transform: translateZ(5vmin) rotateX(270deg);
      height: 10vmin;
      background-color: $color-dark-gray;
    }
  }
}
              
            
!

JS

              
                const X = 'X';
const O = 'O';

// The following array holds all the possible 
// winning combinations for the game. Using 
// bitwise arithmatic, each cell is represented 
// by 2 to the power of the cell's number 
// (2^0,2^1,2^2, ... , 2^8). The winning 
// combination is the sum of all the numbers 
// in the corresponding cells (can also be 
// achieved by OR-ing two numbers). For example,
// the winning combination for the first row is
// 1+2+4 = 7. These patterns are compared with
// each player's pattern by using bitwise AND.
// if the result of the AND operation is equal 
// to the winning pattern, that player is the winner.
const WINNING_PATTERNS = [
  7, 56, 448,	  // Horizontal
  73, 146, 292,	// Vertical
  273, 84			  // Cross
];

const Circle = () => (
  <svg className="pawn circle" viewBox="0 0 128 128">
    <path d="M64,16A48,48 0 1,0 64,112A48,48 0 1,0 64,16"/>
  </svg>
);

const Times = () => (
  <svg className="pawn times" viewBox="0 0 128 128">
    <path d="M16,16L112,112"/>
    <path d="M112,16L16,112"/>
  </svg>
);

class Line extends React.PureComponent {
  
  d() {
    const {pattern} = this.props;
    return {
      7: `M 0,5 H 100`,
      56: `M 0,50 H 100`,
      448: `M 0,95 H 100`,
      73: `M 5,0 V 100`,
      146: `M 50,0 V 100`,
      292: `M 95,0 V 100`,
      273: `M 0,0 L 100,100`,
      84: `M 100,0 L 0,100`,
    }[pattern];
  }
  
  render() {
    const {show} = this.props;
    return (
      <svg className={`line ${show ? 'visible' : ''}`} viewBox='0 0 100 100'>
        <g>
          <path d={this.d()} />
        </g>
      </svg>
    );
  }
}

class Cube extends React.PureComponent {
  
  componentDidMount() {
    // For some reason, setting preserve-3d in CSS causes 
    // visual discrepancies that are only solved by applying 
    // them after the first render.
    setTimeout(() => {
      this.ref.style.transformStyle = 'preserve-3d';
    },500);
  }
  
  render() {
    const {value, onClick} = this.props;
    return (
      <div className={`cube ${value ? 'rotated' : ''}`} onClick={onClick} ref={ref => this.ref = ref}>
        {['top','bottom','left','right','front','back'].map(face => ( 
          <div className={face}>
            {face === 'back' && value === O && <Circle/>}
            {face === 'back' && value === X && <Times/>}
          </div>
        ))}
      </div>
    );
  }
}

const Row = ({children}) => <div className="row">{children}</div>

class Results extends React.PureComponent {
  render() {
    const {winner, draw, onPlayAgain} = this.props;
    return (
      <div className='results'>
        <div className='message'>
          <div className='symbol'>
            {winner === X && <Times/>}
            {winner === O && <Circle/>}
            {draw && <React.Fragment><Times/><Circle/></React.Fragment>}
          </div>
          <div className='text'>
          {winner ? 'Wins!' : 'Draw!'}
          </div>
        </div>
        <div className='replay' onClick={onPlayAgain}>Play Again</div>
      </div>
    );
  }
}

class Board extends React.PureComponent {
  
  render() {
    const {board, onClick} = this.props;
    return (
      <div className="board">
        {board.map((row, i) => (
          <Row>
            {row.map((col, j) => (
              <Cube value={col} onClick={() => onClick(i, j)}/>
            ))}
          </Row>
        ))}
      </div>
    );
  }
}

class Game extends React.PureComponent {
  
  constructor(props) {
    super(props);
    this.state = this.getInitialState();
  }
  
  getInitialState() {
    return {
      player: X,
      patterns: {[X]: 0, [O]: 0},
      winner: null,
      rotated: false,
      board: [
        [null,null,null],
        [null,null,null],
        [null,null,null]
      ]
    };
  }
  
  handleOnClick = (i, j) => {
    if(null === this.state.board[i][j]) {
      const {player, board, patterns} = this.state;
      const state = {
        board: [...board],
        player: player === X ? O : X,
        patterns: {...patterns}
      };
      
      // Set the value in the board
      state.board[i][j] = player;
      
      // Add the value to the player pattern using bitwise OR
      state.patterns[player] = state.patterns[player] |= Math.pow(2,(i*3+j));
      
      state.winner = this.checkForWin(state.patterns);
      
      this.setState(state);
      
      if(state.winner || this.isBoardFull(board)) {
        setTimeout(() => {
          this.setState({rotated: true});
        }, 1500);
      }
    }
  };

  checkForWin(patterns) {
    // Loop through all possible winning sets
		for(let i = 0; i < WINNING_PATTERNS.length; i++) {
			// Use bitwise AND to determind if the player's score
			// Holds a winning combination
			if((WINNING_PATTERNS[i] & patterns[X]) === WINNING_PATTERNS[i])
				return X;
			if((WINNING_PATTERNS[i] & patterns[O]) === WINNING_PATTERNS[i])
				return O;
		}
		// No winner
		return false;
  }

  isBoardFull(board) {
    return !this.state.board.some((row, i) => {
      return row.some((col, j) => null === col)
    })
  }

  handleOnPlayAgain = () => {
    this.setState({rotated: false});
    setTimeout(() => {
      this.setState(this.getInitialState());
    }, 1000);
  };

  getWinningPattern() {
    const {winner, patterns} = this.state;
    return WINNING_PATTERNS.find(pattern => (pattern & patterns[winner]) === pattern);
  }
  
  render() {
    const {board, winner, rotated} = this.state;
    return (
      <div className={`game ${rotated ? 'rotated' : ''}`}>
        <Results winner={winner} draw={!winner && this.isBoardFull(board)} onPlayAgain={this.handleOnPlayAgain}/>
        <Line show={winner} pattern={this.getWinningPattern()}/>
        <Board board={board} onClick={this.handleOnClick}/>
      </div>
    );
  }
}

ReactDOM.render(
  <Game/>,
  document.body
);
              
            
!
999px

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