👀 Views: 3 💬 Answers: 1 📅 Created: 2025-06-05

reactjs useEffect axios JavaScript

I'm learning this framework and I'm sure I'm missing something obvious here, but I've been banging my head against this for hours. I've been struggling with this for a few days now and could really use some help... I'm working with an scenario where my component's state doesn't seem to update correctly after making an asynchronous API call inside a `useEffect` hook. I'm using React 17 and axios for making HTTP requests. The state updates properly when I call a function directly, but when I make an API call, the component renders with stale data and sometimes throws the behavior: `Warning: An update to MyComponent inside a test was not wrapped in act(...)`. Here’s a simplified version of my code: ```javascript import React, { useEffect, useState } from 'react'; import axios from 'axios'; const MyComponent = () => { const [data, setData] = useState(null); const [loading, setLoading] = useState(true); useEffect(() => { const fetchData = async () => { try { const response = await axios.get('https://api.example.com/data'); setData(response.data); } 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; ``` I made sure that the API endpoint returns the correct data and that the network call is successful, but the component displays `null` for `data` on the first render before it updates. I’ve tried adding the state to the dependency array of `useEffect`, but that leads to an infinite loop. How can I ensure that my component waits for the state to update correctly without working with stale data or rendering issues? I'd really appreciate any guidance on this. I appreciate any insights! I'm working in a CentOS environment. Am I approaching this the right way? I'm developing on Windows 10 with Javascript. Thanks for your help in advance! I've been using Javascript for about a year now.