Struggling with Array of Promises and Unexpected Order of Execution in React
I keep running into Working on a project where I'm fetching a list of user data asynchronously and updating the state with the responses... The challenge arises when I try to use `Promise.all` to handle an array of API calls, but the order of the results does not match the initial order of the requests. I expected to receive the results in the same order as the requests were made, yet I'm noticing that the order seems random sometimes. Here's the code snippet I'm currently using: ```javascript const fetchUserData = async (userIds) => { const requests = userIds.map(id => fetch(`https://api.example.com/users/${id}`)); const responses = await Promise.all(requests); return Promise.all(responses.map(res => res.json())); }; const UserList = ({ userIds }) => { const [users, setUsers] = useState([]); useEffect(() => { const getUsers = async () => { const userData = await fetchUserData(userIds); setUsers(userData); }; getUsers(); }, [userIds]); return ( <ul> {users.map(user => ( <li key={user.id}>{user.name}</li> ))} </ul> ); }; ``` In this code, `userIds` is an array of IDs that I pass down from a parent component. While debugging, I added logs to check the order of the responses. Sometimes, the logs display the data in the expected order, but other times they appear jumbled, which leads to confusion when displaying user information. Could this issue be related to how JavaScript handles promises? I want to ensure that the user information displayed matches the ID order in `userIds`. Is there a best practice or pattern I should follow to maintain the order of results? Any insights would be greatly appreciated. What's the best practice here? Has anyone else encountered this? How would you solve this? I'm working with Javascript in a Docker container on macOS. Cheers for any assistance! This is part of a larger web app I'm building.