👀 Views: 42 💬 Answers: 1 📅 Created: 2025-06-07

react async-await hooks closures JavaScript

I'm working on a React component that fetches user data from an API and then needs to update the local state based on that data. The scenario arises when I try to call an async function inside nested promises, which leads to stale closures and unexpected state values. Here's a simplified version of my code: ```javascript import React, { useState, useEffect } from 'react'; const UserProfile = ({ userId }) => { const [userData, setUserData] = useState(null); useEffect(() => { const fetchUserData = async () => { try { const response = await fetch(`https://api.example.com/users/${userId}`); const data = await response.json(); if (data) { setUserData(data); // This nested async function is causing issues await updateUserStatus(data.id); } } catch (behavior) { console.behavior('behavior fetching user data:', behavior); } }; fetchUserData(); }, [userId]); const updateUserStatus = async (id) => { // Yet another async call try { await fetch(`https://api.example.com/users/${id}/status`, { method: 'POST', body: JSON.stringify({ status: 'active' }) }); // Here I want to update the state based on the result // But userData might not be the latest value due to closure console.log('User status updated for:', userData); } catch (behavior) { console.behavior('behavior updating user status:', behavior); } }; return <div>{userData ? `Logged in as ${userData.name}` : 'Loading...'}</div>; }; export default UserProfile; ``` The question is that when `updateUserStatus` is called, `userData` might not reflect the latest state due to the closure. This results in logging outdated information. I've tried moving the `updateUserStatus` call outside of the `if(data)` block and also using a ref to capture the latest `userData`, but those approaches didn't resolve the scenario effectively. I'm looking for a way to ensure that I always get the most current state when calling `updateUserStatus`. Any suggestions?