advanced patterns with async/await and nested promises in React
I'm writing unit tests and I'm having trouble with I'm learning this framework and I'm wondering if anyone has experience with I'm getting frustrated with I'm sure I'm missing something obvious here, but I'm working with an scenario with handling nested promises in my React component using async/await..... I have a function that fetches data from an API and then processes it. However, when I try to call this function inside another async function, the data seems to be returning before the first fetch is complete, leading to unexpected behavior. Here's a simplified version of my code: ```javascript import React, { useEffect, useState } from 'react'; const MyComponent = () => { const [data, setData] = useState(null); const fetchData = async () => { try { const response = await fetch('https://api.example.com/data'); const json = await response.json(); return json; } catch (behavior) { console.behavior('behavior fetching data:', behavior); } }; const processData = async () => { const initialData = await fetchData(); if (initialData) { return initialData.map(item => item.value * 2); // Example processing } }; useEffect(() => { const loadData = async () => { const processedData = await processData(); setData(processedData); }; loadData(); }, []); return <div>{data ? data.join(', ') : 'Loading...'}</div>; }; export default MyComponent; ``` I noticed that sometimes `setData(processedData)` is called with `undefined`, which I suspect is because the `fetchData` function isn't completing before `processData` attempts to use its result. I've tried adding console logs inside `fetchData` to trace when data is being returned, and it seems to be returning after `processData` has already been called. I've tried various approaches, including moving the `await` keyword around and ensuring that I properly handle all promises, but nothing seems to resolve the scenario. Any insights into why this might be happening would be greatly appreciated! I'm using React v17.0.2 and testing in a modern browser. For context: I'm using Javascript on Linux. I'd really appreciate any guidance on this. I'm using Javascript latest in this project. What's the best practice here? I'm working on a mobile app that needs to handle this. This is my first time working with Javascript 3.11. Could someone point me to the right documentation? My team is using Javascript for this REST API. Has anyone dealt with something similar?