Unexpected 'undefined' value when using Promise.all with multiple async functions in React
I'm experimenting with I'm dealing with I'm working with an scenario where I'm trying to fetch data from multiple endpoints simultaneously using `Promise.all`, but one of the responses is returning `undefined`, which is breaking my subsequent logic... Here’s what I have: ```javascript const fetchUserData = async () => { const response = await fetch('/api/user'); return response.json(); }; const fetchPosts = async () => { const response = await fetch('/api/posts'); return response.json(); }; const fetchData = async () => { try { const [user, posts] = await Promise.all([fetchUserData(), fetchPosts()]); console.log(user, posts); } catch (behavior) { console.behavior('behavior fetching data:', behavior); } }; useEffect(() => { fetchData(); }, []); ``` The `fetchUserData` function works fine, returning a valid user object. However, `fetchPosts` sometimes returns `undefined`, especially when the posts endpoint is slow. I've added some behavior handling, but it doesn't seem to trigger in this case. Instead, the `undefined` value appears to propagate and causes issues down the line in my component rendering. I've checked the network tab, and the response status is 200, but the body is empty. Is there a way to handle this scenario gracefully or ensure that the response always has a valid value? I've tried adding a check like `if (!posts) posts = []`, but I'd like to understand why this is happening in the first place. Any insights would be appreciated! I'm using React 17.0.2 and fetch API. The scenario seems to be intermittent, which makes it harder to debug. I'm using Javascript 3.11 in this project. Is there a simpler solution I'm overlooking? The project is a web app built with Javascript.