None.

The value of this, which is the iterator object itself.

Note that you seldom need to call this method directly. The existence of the @@iterator method makes built-in iterators iterable, and iterating syntaxes like the for...of loop automatically call this method to obtain the iterator to loop over.

const arrIterator = [1, 2, 3].values();
for (const value of arrIterator) {
  console.log(value);
}
// Logs: 1, 2, 3

• Iterator
• Symbol.iterator
• Iteration protocols