[FIXED] what happens if I have an empty return statement inside a useEffect?

Issue

lets say I have a small useEffect hook -

useEffect(()=>
    if(!someVariable) return;
      doSomething(someVariable);
),[someVariable]);

what happens when I return without any cleanup function or anything else? is it wrong? gonna create bugs?

I've tried to search the docs but there's nothing about it, and technically it works great, but I wanna be sure

Solution

there's an answer in JS docs about it that has nothing to do with react.js -

"A function without a return statement will return a default value. In the case of a constructor called with the new keyword, the default value is the value of its this parameter. For all other functions, the default return value is undefined"

so it turns out that either way any function in JS return at least undefined value (implicitly) so me doing so in a useEffect has no effect (pun intended)

Answered By - Tzachi Elrom
Answer Checked By - - Jay B. (ReactFix Admin)