advanced patterns with async/await in loop inside React useEffect causing state updates to not reflect
I'm writing unit tests and I'm experiencing an scenario where using async/await inside a loop within a React `useEffect` hook is causing my state updates to not reflect as expected... My goal is to fetch data for multiple IDs from an API, but the state only seems to update after all fetches are complete, leading to stale state values. Here's the code snippet I've been working with: ```javascript import React, { useEffect, useState } from 'react'; const MyComponent = () => { const [data, setData] = useState([]); useEffect(() => { const fetchData = async () => { const ids = [1, 2, 3]; const results = []; for (const id of ids) { const response = await fetch(`https://api.example.com/data/${id}`); const result = await response.json(); results.push(result); setData(prevData => [...prevData, result]); // State update } console.log('Final Data:', results); // This shows all data correctly }; fetchData(); }, []); return <div>{JSON.stringify(data)}</div>; }; export default MyComponent; ``` The main question I'm working with is that `data` does not get updated with each iteration of the loop. Instead, it appears to only reflect the final state after the loop has completed, which means my component renders with stale values until all fetch operations finish. I've tried moving `setData` outside the loop, but then I lose the incremental updates. Instead of seeing the data populate in real-time, I only get the final result in one batch. I also tried using `Promise.all` to fetch all data at once, but that didn't give me the same control I was hoping for, and I still faced similar issues with state updates. I would appreciate any insights or alternative approaches to handle this scenario, especially if I'm missing an important concept related to how state updates work in React with asynchronous operations. Any ideas how to fix this? I'm open to any suggestions.