insertion sort in js

insertsort.js

function insertSort(arr){
  for (var i=1;i<arr.length;i++){
    var j = i;
    while ((j > 0) && (arr[j-1] > arr[j])){
      var pivot = arr[j];
      arr[j] = arr[j-1];
      arr[j-1] = pivot;
      j -= 1;
    }
  }
  return arr;
}