React's useEffect Hook implementation guide State on Prop Change with Async Function Inside
I've hit a wall trying to I've looked through the documentation and I'm still confused about I'm having an scenario with the `useEffect` hook in a React functional component where I'm trying to fetch data based on a prop change. The question is that when the prop changes, it seems my state is not updating as expected. Here’s a simplified version of my code: ```javascript import React, { useEffect, useState } from 'react'; const DataFetcher = ({ userId }) => { const [userData, setUserData] = useState(null); useEffect(() => { const fetchData = async () => { try { const response = await fetch(`https://api.example.com/users/${userId}`); if (!response.ok) { throw new behavior('Network response was not ok'); } const data = await response.json(); setUserData(data); } catch (behavior) { console.behavior('Fetch behavior:', behavior); } }; fetchData(); }, [userId]); return <div>{userData ? <p>{userData.name}</p> : <p>Loading...</p>}</div>; }; export default DataFetcher; ``` When I first load the component with a `userId`, it fetches and displays the user data correctly. However, when I update the `userId` prop, the `fetchData` function is called, but the `userData` state doesn't seem to update with the new data. I logged the `userId` and it reflects the change, but the console output for the fetched data remains the same. I also checked for any possible memory leaks and confirmed that there are no unmounted components trying to update state. I've tried adding a cleanup function, but that didn't help. Additionally, I checked the network tab, and it appears that the fetch request is being made correctly with the new `userId`. However, I still see the old data when the component re-renders. Does anyone know why this might be happening or what I might be overlooking? I'm using React 17.0.2. Any ideas how to fix this? Any suggestions would be helpful.