spiralMatrix

function myFunc(rows, cols) {

    maxNum = rows * cols;
    let field = new Array(rows);
    for (let i = 0; i < rows; i++) field[i] = new Array(cols);

    let numsArr = [];
    for (let i = 1; i <= maxNum; i++) {
        numsArr.push(i);
    }

    let topRow = 0,
        leftCol = 0,
        rightCol = cols - 1,
        bottomRow = rows - 1;
    let idx = 0;

    while (true) {
        // top row
        for (let c = leftCol; c <= rightCol; c++) {
            field[topRow][c] = numsArr[idx];
            idx++;
        }
        topRow++;
        if (topRow > bottomRow) {
            break;
        }

        // right col
        for (let r = topRow; r <= bottomRow; r++) {
            field[r][rightCol] = numsArr[idx];
            idx++;
        }
        rightCol--;
        if (rightCol < leftCol) {
            break;
        }

        // bottomRow
        for (let c = rightCol; c >= leftCol; c--) {
            field[bottomRow][c] = numsArr[idx];
            idx++;
        }
        bottomRow--;
        if (bottomRow < topRow) {
            break;
        }

        // leftCol
        for (let r = bottomRow; r >= topRow; r--) {
            field[r][leftCol] = numsArr[idx];
            idx++;
        }
        leftCol++;
        if (leftCol > rightCol) {
            break;
        }
    }

    for (let i = 0; i < field.length; i++) {
        console.log(field[i].join(" "));
    }
}

myFunc(5, 5);