Selection Sort in Javascript

function selectionSort(array) {
  // step 1: loop from the beginning of the array to the second to last item
  for (let currentIndex = 0; currentIndex < array.length - 1; currentIndex++) {
    // step 2: save a copy of the currentIndex
    let minIndex = currentIndex;
    // step 3: loop through all indexes that proceed the currentIndex
    for (let i = currentIndex + 1; i < array.length; i++) {
      /* step 4:  if the value of the index of the current loop is less
                  than the value of the item at minIndex, update minIndex
                  with the new lowest value index */
      if (array[i] < array[minIndex]) {
        // update minIndex with the new lowest value index
        minIndex = i;
      }
    }
    // step 5: if minIndex has been updated, swap the values at minIndex and currentIndex
    if (minIndex != currentIndex) {
      let temp = array[currentIndex];
      array[currentIndex] = array[minIndex];
      array[minIndex] = temp;
    }
  }
}

let array = [12, 11, 15, 10, 9, 1, 2, 3, 13, 14, 4, 5, 6, 7, 8]
selectionSort(array)
alert(array)