Unexpected Behavior when Using Async/Await in a Loop with Fetch in React
I keep running into I'm getting frustrated with Hey everyone, I'm running into an issue that's driving me crazy. After trying multiple solutions online, I still can't figure this out. I've been struggling with this for a few days now and could really use some help. I'm encountering an issue while trying to fetch data from an API within a loop using async/await in my React application. Specifically, I'm trying to make multiple requests to an endpoint based on an array of IDs, but I notice that my state isn't being updated correctly after the fetch calls complete. Here's the relevant snippet of my code: ```javascript import React, { useEffect, useState } from 'react'; const App = () => { const [data, setData] = useState([]); const ids = [1, 2, 3, 4]; const fetchData = async (id) => { const response = await fetch(`https://api.example.com/data/${id}`); return response.json(); }; useEffect(() => { const fetchAllData = async () => { const results = []; for (const id of ids) { const result = await fetchData(id); results.push(result); } setData(results); }; fetchAllData(); }, []); return ( <div> {data.map(item => ( <div key={item.id}>{item.title}</div> ))} </div> ); }; export default App; ``` The issue I'm facing is that when I inspect the `data` state after `fetchAllData` runs, it seems to be empty or undefined. I also get a console warning about React state updates on unmounted components if I navigate away while the requests are still pending. I've tried adding cleanup logic to prevent this, but it's not fully resolving the issue. Additionally, when I log the results array at the end of the `fetchAllData` function, it appears correctly populated, but this data doesn't seem to reflect in my component. I suspect it might be related to how React batches state updates or a potential race condition. Could anyone provide insights on why the state isn't updating as expected and how to properly handle multiple asynchronous fetch requests in this scenario? I'm using React 17.0.2 and the Fetch API. Thanks in advance! Any help would be greatly appreciated! My development environment is Debian. Cheers for any assistance! I'm developing on Debian with Javascript. Thanks for taking the time to read this! I recently upgraded to Javascript stable. Hoping someone can shed some light on this.