What is the algorithmic complexity of converting an array to a set, via Set(array)?

Question

JavaScript

I solve problems, it is not clear how to take into account the complexity of converting array to set.
According to the idea, Set() loops through all the elements, that is, it adds O (n).
Or does it somehow work directly with memory?

Answer 1

Direct, curved - what does this have to do with algorithmic complexity?
O(n).

Answer 2

The question is in which operations to consider the complexity.