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export default function updateBoard(    board: string[][],    click: number[],): string[][] {    const [row, col] = click;    if (board[row][col] === "M") {        board[row][col] = "X";        return board;    }    if (board[row][col] === "E") {        const validpos = dirs.map((v) => [row + v[0], col + v[1]]).filter((v) =>            typeof board[v[0]]?.[v[1]] !== "undefined"        );        const count = validpos.reduce(            (a, v) => a + Number(["X", "M"].includes(board[v[0]][v[1]])),            0,        );        if (            count > 0        ) board[row][col] = String(count);        else {            board[row][col] = "B";            return validpos.reduce(                (b, v) => updateBoard(b, [v[0], v[1]]),                board,            );        }        return board;    }    return board;}const dirs = [[0, 1], [1, 0], [0, -1], [-1, 0], [1, 1], [1, -1], [-1, 1], [    -1,    -1,]];