Is my code good?

Tell us what’s happening:
Hi. My code runs perfect and it works. So this is not a topic asking for help rather to ask if this implementation by me is considered as a good solution? Do i have good progress here or i am programming with not that efficient way?
Your code so far

function smallestCommons(arr) {

let smallestCommon=1;
let foundIt = true;
let counter = 0;
  for(let i=arr[0];i<=arr[1];i++){

return smallestCommon;

smallestCommons([1, 13]);
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Challenge: Smallest Common Multiple

Link to the challenge:

function smallestCommons(arr) {
  //sort takes time so you do not want use it unless you are actually
  //sorting, but in this case you only have two values so you should
  //just compare them directly as I do
  let i = arr[0] > arr[1] ? arr[0] : arr[1];
  let j = arr[0] < arr[1] ? arr[0] : arr[1];

  //The samllest common can only be as small as our biggest number
  //in range so you that is what you should assume rather than 1;
  let n = i;

  //This is a place holder for i
  let prev = i;

  //with good logic you will evntually gt out of a while loop just 
  //set on true, although I am not vouching for the practice 

  //You really want to avoid a nested loop if possible 
  while (true) {
    //if n does not go into i than increment n, an reset i, and 
    //try again
    if (n % i) {
      i = prev; 

    //if n does go into i then decrement i to check othr values in
    if (n % i === 0) i--;
    //if i has not been reset at this point then I know I have
    //found my smallest common multiple      
    if (i < j) break; 
  return n;

smallestCommons([2, 10]);