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React Component implementation guide State on Async Fetch with UseEffect Hook

πŸ‘€ Views: 283 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-07
react useeffect async-await javascript

I'm working with an scenario in my React application where the component does not update its state after fetching data asynchronously using the `useEffect` hook. I'm using React version 17.0.2 and have the following implementation: ```javascript import React, { useState, useEffect } from 'react'; const MyComponent = () => { const [data, setData] = useState(null); 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('behavior fetching data:', behavior); } finally { setLoading(false); } }; fetchData(); }, []); if (loading) { return <div>Loading...</div>; } return <div>Data: {JSON.stringify(data)}</div>; }; export default MyComponent; ``` The `fetchData` function is being called when the component mounts, but when I check the console logs, the state does not seem to updateβ€”the component displays 'Data: null' even after the fetch completes. I confirmed that the API endpoint is correct and returns the expected JSON data. I've tried debugging by logging inside the `try` block and right after setting the data, but the state still appears to be `null`. Is there something I might be missing in how React handles state updates or in the async code execution? I also checked the React DevTools, and I can see that the `data` state remains `null` after the fetch. Any insights on why the component is not re-rendering with the updated state would be greatly appreciated. This is part of a larger microservice I'm building. What am I doing wrong?