Unable to get a terminal output because of error: Uncaught RangeError: Maximum call stack size exceeded.

Tried to look at similar questions on stackoverflow, like this Maximum call stack size exceeded in merge sort and added conditionals to possibly stop infinite recursion.

Still couldn't fix the problem. Hopefully looking for an answer.

const unsortedArray = [1, 10, 5, 8, 7, 6, 4, 3, 2, 9];
const sortedArray = Array(unsortedArray.length);

function sort(unsortedArray, start, middle, end) {

    let i= start;
    let j= middle;
    let k= start;

    while(i < middle && j <= end) {

        if(unsortedArray[i]<=unsortedArray[j]) {
            sortedArray[k] = unsortedArray[i];
            i++
        } else {
            sortedArray[k] = unsortedArray[j];
            j++;
        }
        k++
    }

    if (i >= middle) {
        while(j<= end) {
            sortedArray[k] = unsortedArray[j];
            j++;
            k++;
        }
    } else if (j >= end) {
        while (i <= middle) {
            sortedArray[k] = unsortedArray[i];
            i++;
            k++;
        }
    }
}

function splitMerge(unsortedArray, start, end) {
    if(end>start) {
        middle = Math.floor((start + end)/2);
        splitMerge(unsortedArray, start, middle);
        splitMerge(unsortedArray, middle, end);
        sort(unsortedArray, start , middle, end);
    }
    return sortedArray;
}

const showResult = splitMerge(unsortedArray, 0, unsortedArray.length-1);
console.log(showResult);