Build a Tic-Tac-Toe Game - Build a Tic-Tac-Toe Game

JavaScript
1

Tell us what’s happening:

I don’t understand tests 6, 7, and 8. Tests 6/7 want multiple clicks on a square to flip between X/O, but test 8 says nothing should happen clicking an already used square. If I have l lines 14-16 in my code enabled, I pass test 8. If I comment them out, I pass 6/7 and fail test 8.

  1. Second click of a square should result in O being displayed.
  2. Subsequent clicks of a button.square element alternate between X and O.
  3. Clicking already used button.square element results in no change.

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <title>Tic-Tac-Toe</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.3.1/umd/react.development.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.3.1/umd/react-dom.development.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/7.26.5/babel.min.js"></script>
    <script
      data-plugins="transform-modules-umd"
      type="text/babel"
      src="index.jsx"
    ></script>
    <link rel="stylesheet" href="styles.css" />
</head>

<body>
    <div id="root"></div>
    <script
      data-plugins="transform-modules-umd"
      type="text/babel"
      data-presets="react"
      data-type="module"
    >
      import { Board } from './index.jsx';
      ReactDOM.createRoot(document.getElementById('root')).render(<Board />);
    </script>
</body>

</html>

/* file: styles.css */
* {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  margin: 20px;
  padding: 0;
}

h1 {
  margin-top: 0;
  font-size: 22px;
}

.square {
  background: #fff;
  border: 2px 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;
}

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

/* button {
  margin: 1;

} */

/* file: index.jsx */
const { useState } = React;

function Square({value, onSquareClick}) {
  return (
    <button className="square" onClick={onSquareClick}>{value}</button>
  ) 
}

export function Board(i) {
  const [squares, setSquares] = useState(Array(9).fill(null));
  const [xIsNext, setXIsNext] = useState(true); 

  function handleClick(i) { 
    if (squares[i]) {
      return;
    }
    const nextSquares = squares.slice();
    if (xIsNext) {
      nextSquares[i] = "X";
    } else {
      nextSquares[i] = "O";
    } 
    setXIsNext(!xIsNext) 
    console.log(nextSquares);
    setSquares(nextSquares); 
  }

  function handleReset() {
    setSquares(Array(9).fill(null))
  }

  const winner = calculateWinner(squares);
  let status;
  if (winner) {
    status = "Winner: " + winner;
  } else {
    status = "Next player: " + (xIsNext ? "X" : "O");
  }

  return (
    <div>
      <h1>Tic-Tac-Toe</h1>
      <div className="status">{status}</div>
      <div className="board-row">
        <Square value={squares[0]} onSquareClick={() => handleClick(0)}/>
        <Square value={squares[1]} onSquareClick={() => handleClick(1)} />
        <Square value={squares[2]} onSquareClick={() => handleClick(2)} />
      </div>
      <div className="board-row">
        <Square value={squares[3]} onSquareClick={() => handleClick(3)}/>
        <Square value={squares[4]} onSquareClick={() => handleClick(4)} />
        <Square value={squares[5]} onSquareClick={() => handleClick(5)} />
      </div>
      <div className="board-row">
        <Square value={squares[6]} onSquareClick={() => handleClick(6)}/>
        <Square value={squares[7]} onSquareClick={() => handleClick(7)} />
        <Square value={squares[8]} onSquareClick={() => handleClick(8)} />
      </div><br/>
      <button id="reset" onClick={handleReset}>Reset</button>
    </div>
  )
}

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;
}

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Challenge Information:

Build a Tic-Tac-Toe Game - Build a Tic-Tac-Toe Game

2

Test 6 & 7 refers to different button.square elements, second click on button.square element should display O, and further clicks should alternate between X and O. Unless the specific button.square element was already clicked before, in which case nothing should change - this is test 8.