Smallest Common Multiple strange problem

Smallest Common Multiple strange problem
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Tell us what’s happening:

Hello guys. Yesterday, I tried to complete this challenge, but I got to the point, where I couldn’t find an answer. Today I am trying the same, but with same result. The problem is, that my solution works for first four demands on the left (" smallestCommons([1, 5]) should return a number." and so on…), but not the last two. I can’t figure out, why does my solution behave this way. I think it does not do what it’s supposed to, based on program I written. Here is my solution and I kindly ask you to take a look, if you guys can find the problem:

function smallestCommons(arr) {
  arr = arr.sort ((a,b) => a-b);
  var multiple = arr[1];

  do{
    for(let i=arr[1]; i>= arr[0]; i--){
      if(multiple%i != 0){
        multiple++;
        break;
      }

      if(i===arr[0])
        return multiple;
    }
  }while(1);
  return arr;
}


smallestCommons([1,5]);

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Technically your code produce the correct output, however it’s not getting accepted because FCC has an infinite loop protection, and your code stays inside the same loop more that ~500ms.

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Oh, I see. So I have to figure out how to make faster code. Thank you!

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