Convert 1D Array Into 2D Array LeetCode solution in JavaScript

1
var construct2DArray = function (original, m, n) {
2
  if (original.length !== m * n) return [];
3
  let result = [];
4
  let arr = [];
5
  for (let i = 0; i < original.length; i++) {
6
    arr.push(original[i]);
7
    if (arr.length === n) {
8
      result.push(arr);
9
      arr = [];
10
    }
11
  }
12
  return result;
13
};