insertion_sort.js

const insertionSort = (nums) => {
  const arr = nums.toString().split('');
  for (let i = 1; i < arr.length; i++) {
    let j = i - 1
    let tmp = arr[i]
    while (j >= 0 && arr[j] > tmp) {
      arr[j + 1] = arr[j]
      j--
    }
    arr[j + 1] = tmp
  }
  return arr
}