quick tic tac toe demo

class TicTacToe {
  constructor() {
    this.board = [
      ['-', '-', '-'],
      ['-', '-', '-'],
      ['-', '-', '-'],
    ];

    this.currentPlayer = 'x';
  }

  placePiece(i, j) {
    // piece within bounds
    if (!(i >= 0 && i < 3 && j >= 0 && j < 3)) {
      console.log('invalid move');
      return;
    }

    if (this.board[i][j] === '-') {
      this.board[i][j] = this.currentPlayer;
      this.currentPlayer = this.currentPlayer === 'x' ? 'o' : 'x';

      this.renderBoard();

      let victor = this.checkVictory();

      if (victor) {
        console.log(victor + ' wins!!!!');
        this.currentPlayer = 'x';
        this.board = [
          ['-', '-', '-'],
          ['-', '-', '-'],
          ['-', '-', '-'],
        ];
      }
    }
  }

  checkVictory() {
    let victor = undefined;

    // check rows for victories HORIZONTAL CHECK
    for (let i = 0; i < this.board.length; ++i) {
      let row = this.board[i];

      victor = this.checkCrossSectionVictory(row);
      if (victor) {
        return victor;
      }
    }

    // check columns for victories VERTICAL CHECK
    for (let i = 0; i < this.board.length; i++) {
      let column = this.board.map((row) => {
        return row[i];
      });

      victor = this.checkCrossSectionVictory(column);
      if (victor) {
        return victor;
      }
    }

    // checks top left diagonal for vicotries TOP-LEFT DIAGONAL
    let topLeftDiag = [this.board[0][0], this.board[1][1], this.board[2][2]];

    victor = this.checkCrossSectionVictory(topLeftDiag);
    if (victor) {
      return victor;
    }

    // checks top right diagonal for vicotries TOP-RIGHT DIAGONAL
    let topRightDiag = [this.board[0][2], this.board[1][1], this.board[2][0]];

    victor = this.checkCrossSectionVictory(topRightDiag);
    if (victor) {
      return victor;
    }

    return victor;
  }

  checkCrossSectionVictory(crossSection) {
    let victory = crossSection.every((element) => {
    return element !== '-' && element === crossSection[0];
    });

    if (victory) {
    return crossSection[0];
    }
  }


  renderBoard() {
    console.log(this.board[0]);
    console.log(this.board[1]);
    console.log(this.board[2]);
    console.log(this.currentPlayer + '\'s turn')
  }
}
let t = new TicTacToe();
t.placePiece(0, 0);
t.placePiece(0, 1);
t.placePiece(1, 0);
t.placePiece(0, 2);
t.placePiece(2, 0);

t.renderBoard();