97 lines
2.2 KiB
JavaScript
97 lines
2.2 KiB
JavaScript
import './App.css';
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import { useState } from 'react';
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function Square({value, onSquareClick}) {
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return (
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<button
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className="square"
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onClick={onSquareClick}
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>
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{value}
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</button>
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);
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}
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function Board() {
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const [xIsNext, setXIsNext] = useState(true);
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const [squares, setSquares] = useState(Array(9).fill(null));
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function handleClick(i) {
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if (squares[i] || calculateWinner(squares)) {
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return;
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}
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const nextSquares = squares.slice();
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if (xIsNext) {
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nextSquares[i] = "X";
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} else {
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nextSquares[i] = "O";
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}
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setSquares(nextSquares);
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setXIsNext(!xIsNext);
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}
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const winner = calculateWinner(squares);
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let status;
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if (winner) {
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status = "Winner: " + winner;
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} else {
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status = "Next player: " + (xIsNext ? "X" : "O");
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}
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return (
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<>
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<div className="status">{status}</div>
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<div className="board-row">
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<Square value={squares[0]} onSquareClick={() => handleClick(0)}/>
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<Square value={squares[1]} onSquareClick={() => handleClick(1)}/>
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<Square value={squares[2]} onSquareClick={() => handleClick(2)}/>
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</div>
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<div className="board-row">
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<Square value={squares[3]} onSquareClick={() => handleClick(3)}/>
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<Square value={squares[4]} onSquareClick={() => handleClick(4)}/>
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<Square value={squares[5]} onSquareClick={() => handleClick(5)}/>
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</div>
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<div className="board-row">
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<Square value={squares[6]} onSquareClick={() => handleClick(6)}/>
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<Square value={squares[7]} onSquareClick={() => handleClick(7)}/>
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<Square value={squares[8]} onSquareClick={() => handleClick(8)}/>
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</div>
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</>
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);
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}
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function App() {
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return (
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<div className="game">
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<div className="game-board">
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<Board />
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</div>
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<div className="game-info">
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<ol>{/*TODO*/}</ol>
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</div>
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</div>
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);
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}
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export default App;
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function calculateWinner(squares) {
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const lines = [
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[0, 1, 2],
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[3, 4, 5],
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[6, 7, 8],
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[0, 3, 6],
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[1, 4, 7],
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[2, 5, 8],
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[0, 4, 8],
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[2, 4, 6]
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];
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for (let i = 0; i < lines.length; i++) {
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const [a, b, c] = lines[i];
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if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
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return squares[a];
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}
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}
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return null;
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} |