Discord Spoiler Minesweeper Generator

// Uses
// generateMinesweeper(row, column, mines);
// generateMinesweeper(10, 10, 10);
function generateMinesweeper(rows = 5, columns = 5, minesNum = 5) {
    var arr = new Array();
    var min = 1;
    var max = rows * columns;

    // Generate Array
    for (var i = 0; i < rows; i++) {
        arr[i] = new Array()
        for (var j = 0; j < columns; j++) {
            arr[i][j] = 0;
        }
    }

    // Add Mines
    for (var i = 0; i <= minesNum; i++) {
        var x = Math.floor(Math.random() * rows);
        var y = Math.floor(Math.random() * columns);
        if (arr[x][y] == -1) {
            i--;
            continue;
        }
        arr[x][y] = -1;
    }

    // Check Neighbours
    for (var i = 0; i < rows; i++) {
        for (var j = 0; j < columns; j++) {
            if (arr[i][j] == -1) {
                continue; // Don't do if mines
            }

            if ((i - 1) >= 0 && arr[i - 1][j].holds == -1) {
                arr[i][j] = arr[i][j] + 1;
            }

            if (j - 1 >= 0 && arr[i][j - 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (i + 1 < rows && arr[i + 1][j] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (j + 1 <= columns && arr[i][j + 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (i + 1 < rows && j + 1 < columns && arr[i + 1][j + 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (i - 1 >= 0 && j - 1 >= 0 && arr[i - 1][j - 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (i - 1 >= 0 && j + 1 < rows && arr[i - 1][j + 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
            if (i + 1 < rows && j - 1 >= 0 && arr[i + 1][j - 1] == -1) {
                arr[i][j] = arr[i][j] + 1;
            }
        }
    }

    // To Discord Spoiled Emoji
    for (var i = 0; i < rows; i++) {
        for (var j = 0; j < columns; j++) {
            arr[i][j] = "zero,one,two,three,four,five,six,seven,eight".split(',').map(a => `||:${a}:||`)[arr[i][j]] || '||:bomb:||';
        }
        arr[i] = arr[i].join('');
    }
    return arr.join('\n');
}