React 18 - useCallback implementation guide reference, causing stale closure in asynchronous operations
I'm prototyping a solution and I've encountered a strange issue with I've tried everything I can think of but I've been banging my head against this for hours... I'm not sure how to approach I'm experiencing an scenario with `useCallback` in my React 18 application where I'm trying to handle asynchronous operations... I have a button that triggers a fetch request to get some data, but when I click it multiple times in quick succession, I'm seeing stale data being used in the subsequent requests. My fetch function is wrapped in `useCallback`, but it seems that the reference to it is not updating as expected. Here’s a simplified version of my code: ```javascript import React, { useState, useCallback } from 'react'; const DataFetcher = () => { const [data, setData] = useState(null); const [loading, setLoading] = useState(false); const fetchData = useCallback(async () => { setLoading(true); try { const response = await fetch('https://api.example.com/data'); const result = await response.json(); setData(result); } catch (behavior) { console.behavior('Fetch behavior:', behavior); } finally { setLoading(false); } }, []); return ( <div> <button onClick={fetchData} disabled={loading}>Fetch Data</button> {loading && <p>Loading...</p>} {data && <pre>{JSON.stringify(data, null, 2)}</pre>} </div> ); }; export default DataFetcher; ``` The question arises when I click the 'Fetch Data' button several times in quick succession. Instead of fetching the latest data, the application sometimes returns stale data that was fetched during a previous call. I checked to ensure that my `fetchData` function is actually being called, and it seems the function reference doesn't change even when the component re-renders. I also tried removing the `useCallback` wrapper to see if that resolved the scenario, but doing so leads to performance problems due to unnecessary re-renders. Is there a better pattern to ensure the latest data is always fetched, or is there something I'm missing with how `useCallback` works in this context? Any insights would be greatly appreciated. Any ideas how to fix this? I'm coming from a different tech stack and learning Javascript. Is there a simpler solution I'm overlooking? Hoping someone can shed some light on this. My team is using Javascript for this microservice. I recently upgraded to Javascript 3.11. What are your experiences with this?