SpiralMatrix.js

function spiralMatrix(total) {
    var noOfRows = 0;
    var noOfCols = 0;
    var numbers = [];
    for (let i = 0; i < Math.pow(total, 2); i++) {
        numbers[i] = i + 1;
    }
    var numberIter = 0;
    var newarr = [];
    for (let i = 0; i < total; i++) {
        newarr.push([]);
    }

    for (let i = 0; i < newarr.length; i++) {
        for (let j = 0; j < newarr.length; j++) {
            newarr[i][j] = 0;
        }
    }
    for (let x = 0; x <= Math.pow(total, 2); x++) {
        for (let col = 0; col < total; col++) {
            if (newarr[noOfRows][col] == 0) {
                newarr[noOfRows][col] = numbers[numberIter];
                noOfCols++;
                numberIter++;
            }
        }
        for (let row = 0; row < total; row++) {
            if (newarr[row][noOfCols - 1] == 0) {
                newarr[row][noOfCols - 1] = numbers[numberIter];
                noOfRows++;
                numberIter++;
            }
        }
        for (let col = noOfCols; col >= 0; col--) {
            if (newarr[noOfRows][col] == 0) {
                newarr[noOfRows][col] = numbers[numberIter];
                noOfCols--;
                numberIter++;
            }
        }
        for (let row = noOfRows; row >= 0; row--) {
            if (newarr[row][noOfCols - 1] == 0) {
                newarr[row][noOfCols - 1] = numbers[numberIter];
                noOfRows--;
                numberIter++;
            }
        }
    }
    return newarr;
}

//spiralMatrix(4);