前端canvas写五子棋超过五个的判断的代码写一份

以下是前端canvas写五子棋超过五个的判断的代码：

function checkWin(x, y, chessBoard) {
  var count = 1;
  var color = chessBoard[x][y];
  // 横向判断
  for (var i = x - 1; i >= 0; i--) {
    if (chessBoard[i][y] === color) {
      count++;
    } else {
      break;
    }
  }
  for (var i = x + 1; i < 15; i++) {
    if (chessBoard[i][y] === color) {
      count++;
    } else {
      break;
    }
  }
  if (count >= 5) {
    return true;
  }
  // 纵向判断
  count = 1;
  for (var i = y - 1; i >= 0; i--) {
    if (chessBoard[x][i] === color) {
      count++;
    } else {
      break;
    }
  }
  for (var i = y + 1; i < 15; i++) {
    if (chessBoard[x][i] === color) {
      count++;
    } else {
      break;
    }
  }
  if (count >= 5) {
    return true;
  }
  // 左上到右下判断
  count = 1;
  for (var i = x - 1, j = y - 1; i >= 0 && j >= 0; i--, j--) {
    if (chessBoard[i][j] === color) {
      count++;
    } else {
      break;
    }
  }
  for (var i = x + 1, j = y + 1; i < 15 && j < 15; i++, j++) {
    if (chessBoard[i][j] === color) {
      count++;
    } else {
      break;
    }
  }
  if (count >= 5) {
    return true;
  }
  // 右上到左下判断
  count = 1;
  for (var i = x - 1, j = y + 1; i >= 0 && j < 15; i--, j++) {
    if (chessBoard[i][j] === color) {
      count++;
    } else {
      break;
    }
  }
  for (var i = x + 1, j = y - 1; i < 15 && j >= 0; i++, j--) {
    if (chessBoard[i][j] === color) {
      count++;
    } else {
      break;
    }
  }
  if (count >= 5) {
    return true;
  }
  return false;
}