Myu: React 試してみる

https://mae.chab.in/archives/2943
のリンクを参考にさせていただきました。

Babel等使わないでいいように、古いVer形式です
三目ならべです
 

<!DOCTYPE html>
<html>
  <head>
    <script src="http://fb.me/react-0.13.3.js"></script>
    <script src="http://fb.me/JSXTransformer-0.13.3.js"></script>
    
    <style>
    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:focus {
  outline: none;
}

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

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

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

</style>
    
    
  </head>
  <body>
    <div id="container">
</div>
<script type="text/jsx">





















var Square =React.createClass( {
render() {
  return (
    <button className="square" onClick={() => this.props.onClick()}>
      {this.props.value}
    </button>
  );
  }
  });

var Board  =React.createClass ( {

 renderSquare(i) {
  return <square value={this.props.squares[i]} onClick={() => this.props.onClick(i)} />;
  
 },
 
  render() {



    return (
      <div>
        
        <div className="board-row">
          {this.renderSquare(0)}
          {this.renderSquare(1)}
          {this.renderSquare(2)}
        </div>
<div className="board-row">
          {this.renderSquare(3)}
          {this.renderSquare(4)}
          {this.renderSquare(5)}
        </div>
<div className="board-row">
          {this.renderSquare(6)}
          {this.renderSquare(7)}
          {this.renderSquare(8)}
        </div>
</div>
);
  }
});

var Game =React.createClass ({
 getInitialState() {
   return({  history: [{ squares: Array(9).fill(null) }] ,xIsNext: true,stepNumber: 0 })


 },
  handleClick(i) {
  var history = this.state.history;

  const current = history[this.state.stepNumber];
  const squares = current.squares.slice();
  if (calculateWinner(squares) || squares[i]) {
    return;
  }
  squares[i] = this.state.xIsNext ? 'X' : 'O';
  this.setState({
    history: history.concat([{
      squares: squares
    }]),
    xIsNext: !this.state.xIsNext,
    stepNumber: history.length,
  });
 },
 jumpTo(step) {
  this.setState({
    stepNumber: step,
    xIsNext: (step % 2) ? false : true,
  });
},
  render() {
  
   const history = this.state.history;
   const current = history[this.state.stepNumber];
   const winner = calculateWinner(current.squares);

  let status;
  if (winner) {
   status = 'Winner: ' + winner;
  } else {
   status = 'Next player: ' + (this.state.xIsNext ? 'X' : 'O');
  }
  
  const moves = history.map((step, move) => {
  const desc = move ?
    'Move #' + move :
    'Game start';
  return (
<li>
      <a href="#" onClick={() => this.jumpTo(move)}>{desc}</a>
    </li>
);
});

  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>
<ol>{moves}</ol>
</div>
</div>
);
  }
});

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

m=React.render(
  <game />,
  document.getElementById('container')
);

function 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;
}



    </script>
  </body>
</html>
Myu

2017年12月16日土曜日

React 試してみる

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