分享一个简单的井字游戏（三行棋）实现（React）

直接看效果

x是先手、o是后手

当然还有很多优化空间，下面看看代码

import React, { useEffect, useState } from 'react';

const rowStyle = {
  display: 'flex'
}

const squareStyle = {
  'width':'60px',
  'height':'60px',
  'backgroundColor': '#ddd',
  'margin': '4px',
  'display': 'flex',
  'justifyContent': 'center',
  'alignItems': 'center',
  'fontSize': '20px',
  'color': 'white'
}

const boardStyle = {
  'backgroundColor': '#eee',
  'width': '208px',
  'alignItems': 'center',
  'justifyContent': 'center',
  'display': 'flex',
  'flexDirection': 'column',
  'border': '3px #eee solid'
}

const containerStyle = {
  'display': 'flex',
  'alignItems': 'center',
  'flexDirection': 'column'
}

const instructionsStyle = {
  'marginTop': '5px',
  'marginBottom': '5px',
  'fontWeight': 'bold',
  'fontSize': '16px',
}

const buttonStyle = {
  'marginTop': '15px',
  'marginBottom': '16px',
  'width': '80px',
  'height': '40px',
  'backgroundColor': '#8acaca',
  'color': 'white',
  'fontSize': '16px',
}

function Square(props) {
  // console.log(props)
  return (
    <div
      className={`square ${props.className}`}
      style={squareStyle}>
      {props.innerHtml}
    </div>
  );
}

function Board(props) {

  const [xo, setXo] = useState('x')
  const [winner, setWinner] = useState('None')
  const [board, setBoard] = useState(
    {
      arr: [
    ['', '',''],
    ['','',''],
    ['', '','']
  ]})
  const [canPlay, setCanPlay] = useState(true)
  
  function handlePlay(e) {
    if (canPlay && e.target.innerHTML === '') {

      let row = e.target.parentElement.id.match(/\d/)[0];
      let col = e.target.classList[1].match(/\d/)[0];
      
      setBoard((prevBoard) => {
        let {arr} = prevBoard;
        arr[row][col] = xo;
        return {arr,row,col}
      })

      if(xo==='x'){
        setXo('o')
      }else{
        setXo('x')
      }


    }
  }

  useEffect(() => {
    if (board.row) {
      handlejudge()      
    }

  }, [board])

  function handlejudge() {
    const { arr ,row, col} = board
    let mayWinner = arr[row][col] 
 
    if (
      (arr[row][0] === mayWinner && arr[row][1] === mayWinner && arr[row][2] === mayWinner)
      ||( arr[0][col] === mayWinner && arr[1][col] === mayWinner && arr[2][col] === mayWinner)
      ||(arr[1][1]!=''&&arr[0][0] === mayWinner && arr[1][1] === mayWinner && arr[2][2] === mayWinner)
      ||(arr[1][1]!=''&&arr[0][2] === mayWinner && arr[1][1] === mayWinner && arr[2][0] === mayWinner)
      
    ) {
      setWinner(mayWinner); 
      setCanPlay(false);
    }

  }


  function reset() {
    setXo('x');
    setWinner('None')
    setBoard({
      arr: [
    ['', '',''],
    ['','',''],
    ['', '','']
      ]
    });
    setCanPlay(true);
  }
  
  return (
    <div style={containerStyle} className="gameBoard">
      <div id="statusArea" className="status" style={instructionsStyle}>Next player: <span>{xo}</span></div>
      <div id="winnerArea" className="winner" style={instructionsStyle}>Winner: <span>{winner}</span></div>
      <button style={buttonStyle} onClick={reset}>Reset</button>
      <div style={boardStyle} onClick={(e)=>handlePlay(e)}>
        <div className="board-row" id="row0" style={rowStyle}>
          <Square className="square0" innerHtml={ board.arr[0][0]}/>
          <Square className="square1" innerHtml={ board.arr[0][1]} />
          <Square className="square2" innerHtml={ board.arr[0][2]}/>
        </div>
        <div className="board-row" id="row1" style={rowStyle}>
          <Square className="square0" innerHtml={ board.arr[1][0]}/>
          <Square className="square1" innerHtml={ board.arr[1][1]}/>
          <Square className="square2" innerHtml={ board.arr[1][2]}/>
        </div>
        <div className="board-row" id="row2" style={rowStyle}>
          <Square className="square0" innerHtml={ board.arr[2][0]}/>
          <Square className="square1" innerHtml={ board.arr[2][1]}/>
          <Square className="square2" innerHtml={ board.arr[2][2]}/>
        </div>
      </div>
    </div>
  );
}

export default function Game() {
  return (
    <div className="game">
      <div className="game-board">
        <Board  />
      </div>
    </div>
  );
}


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个人觉得还有很多地方写的都不优雅，比如说棋盘的初始化，再比如说输赢的判断。
朋友们有兴趣可以帮忙优化。
这是前两天笔试的一道题，个人觉得这样的笔试对前端是更有意义的，不过大多数考的还是算法。