React state updates not reflecting correctly when using async functions
I'm integrating two systems and I'm trying to debug I'm optimizing some code but I'm facing an issue with state updates in my React component when using asynchronous functions..... I have a React functional component that fetches data from an API, updates the state, and then attempts to render that data. However, I'm noticing that the state does not seem to update as expected, leading to stale data being displayed. Here's a simplified version of my component: ```javascript import React, { useState, useEffect } from 'react'; const DataFetcher = () => { const [data, setData] = useState(null); const [loading, setLoading] = useState(true); const fetchData = async () => { try { const response = await fetch('https://api.example.com/data'); const result = await response.json(); setData(result); setLoading(false); } catch (error) { console.error('Error fetching data:', error); setLoading(false); } }; useEffect(() => { fetchData(); }, []); return ( <div> {loading ? <p>Loading...</p> : <pre>{JSON.stringify(data, null, 2)}</pre>} </div> ); }; export default DataFetcher; ``` The `fetchData` function is being called inside a `useEffect` hook, which should only run once when the component mounts. However, if the API call takes time, I notice my UI doesn't update with the latest data immediately after the fetch call completes. Instead, it appears to render stale data from the initial state. I initially thought this issue might be related to the asynchronous nature of `setData`, but I confirmed that the fetched data is valid and logs correctly inside the `fetchData` function. However, on the UI, I see the message 'Loading...' even after the data is fetched. I've tried adding a console log right after `setData(result);`, and it does show the correct data, which indicates that the state is being set correctly, yet the component does not re-render with the new state. I'm using React 17.0.2 and have verified that there are no other state management issues elsewhere in the component. Has anyone encountered a similar issue? What could be causing the UI not to update with the new state after asynchronous operations? This is for a application running on CentOS. Thanks for your help in advance! I'm open to any suggestions. For context: I'm using Javascript on CentOS. What's the correct way to implement this? I'm coming from a different tech stack and learning Javascript. I appreciate any insights!