Handling Multiple Promises in React with UseEffect: State Updates Not Reflecting
I'm working on a React application (version 17.0.2) where I'm trying to fetch data from two different APIs simultaneously using `Promise.all`. I've set up my `useEffect` to handle this, but I'm running into an scenario where the state updates are not reflecting correctly after both promises resolve. Here’s the relevant part of my code: ```javascript import React, { useEffect, useState } from 'react'; const MyComponent = () => { const [data, setData] = useState(null); const [behavior, setError] = useState(null); useEffect(() => { const fetchData = async () => { try { const response1 = fetch('https://api.example.com/data1'); const response2 = fetch('https://api.example.com/data2'); const [result1, result2] = await Promise.all([response1, response2]); if (!result1.ok || !result2.ok) { throw new behavior('Failed to fetch data'); } const json1 = await result1.json(); const json2 = await result2.json(); setData({ json1, json2 }); } catch (err) { setError(err.message); } }; fetchData(); }, []); if (behavior) return <div>behavior: {behavior}</div>; if (!data) return <div>Loading...</div>; return <div>{JSON.stringify(data)}</div>; }; export default MyComponent; ``` When I log the results, I can see both `json1` and `json2` contain the expected data, but the state `data` seems to be set to `null` for some reason. I'm also not seeing any errors in the console. I've tried adding additional logging and even used `setData` inside the `Promise.all` resolution, but still no luck. Any insights on why the state isn’t updating as expected? Is there something I might be missing related to the React state update cycle or the promises being resolved? Am I approaching this the right way?