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State implementation guide correctly in React functional component after async fetch with useEffect

👀 Views: 78 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-05
react useeffect async-await JavaScript

I've been working on this all day and I'm attempting to set up I'm updating my dependencies and I've spent hours debugging this and I tried several approaches but none seem to work. I'm working with an scenario with state not updating as expected in my React functional component when performing an async fetch inside a `useEffect` hook. I'm using React 17 and have the following setup: ```javascript import React, { useEffect, useState } from 'react'; const DataFetcher = () => { const [data, setData] = useState([]); const [loading, setLoading] = useState(true); useEffect(() => { const fetchData = async () => { 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); } }; fetchData(); }, []); if (loading) { return <div>Loading...</div>; } return ( <div> <h1>Data</h1> <ul> {data.map(item => ( <li key={item.id}>{item.name}</li> ))} </ul> </div> ); }; export default DataFetcher; ``` I've confirmed that the API endpoint returns data in the correct format, but when the component mounts, the `data` state doesn't seem to update properly; it remains an empty array. The console logs show that data is being fetched without errors, but I never see any rendered items in the list. I suspect this might be related to how React batches state updates, but I'm not sure. I've tried adding a console log immediately after calling `setData(result);` to see if it was getting called, and it does show the correct data. However, the rendered output does not change. I've also checked that the `key` prop in the `map` function is unique. What could be causing this scenario with my state updates? Is there a better approach? This is my first time working with Javascript LTS. Any ideas how to fix this? This is part of a larger web app I'm building. Is there a simpler solution I'm overlooking? Any ideas how to fix this? I'm working in a CentOS environment.