i4.js

function insertSort(array) {
  for (let item = 1; item < array.length; item++) {
    for (let index = item; index > 0; index--) {
      if (array[index] < array[index - 1]) {
        const temp = array[index];
        array[index] = array[index - 1];
        array[index - 1] = temp;
      }
    }
  }
}