MaxWinFullStack

const { useState, useEffect, useRef } = React;

function TicTacToe() {
  const emptyBoard = Array(9).fill(null);

  // Game state
  const [board, setBoard] = useState(emptyBoard);
  const [playerSymbol, setPlayerSymbol] = useState("X"); // Player chooses X or O
  const [turn, setTurn] = useState("X"); // Whose turn: X or O
  const [mode, setMode] = useState("computer"); // 'computer' or 'friend'