Saving handler in useEffect()

[toschlog]

The current implementation contains this:

useEffect(() => {
    savedHandler.current = handler;
}, [handler]);

Is there any reason this has to be in a useEffect()? I would just do:

savedHandler.current = handler;

I would think that would be quicker to just store handler every time than having useEffect() check to see if it's changed.

Or am I missing something?

[Alexddsilva]

Its inside an effect because will happen only when handler changes.