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advanced patterns with useReducer and context API in a deeply nested React component

👀 Views: 174 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-09
react context-api usereducer JavaScript

I'm confused about I've been banging my head against this for hours. I'm experiencing an scenario with state management when using the `useReducer` hook alongside the Context API in a deeply nested React component structure. I have a global state that is intended to manage user authentication status, and I'm trying to update this state when a user logs in. The scenario arises when I call my dispatch function from a deeply nested child component. I expect the state to update and subsequently trigger a re-render, but it seems like the state remains unchanged. The relevant code snippets are as follows: ```javascript // AuthContext.js import React, { createContext, useReducer, useContext } from 'react'; const initialState = { isAuthenticated: false }; const AuthContext = createContext(); const authReducer = (state, action) => { switch (action.type) { case 'LOGIN': return { ...state, isAuthenticated: true }; case 'LOGOUT': return { ...state, isAuthenticated: false }; default: return state; } }; export const AuthProvider = ({ children }) => { const [state, dispatch] = useReducer(authReducer, initialState); return ( <AuthContext.Provider value={{ state, dispatch }}> {children} </AuthContext.Provider> ); }; export const useAuth = () => useContext(AuthContext); ``` In my nested component: ```javascript // NestedComponent.js import React from 'react'; import { useAuth } from './AuthContext'; const NestedComponent = () => { const { dispatch } = useAuth(); const handleLogin = () => { dispatch({ type: 'LOGIN' }); console.log('Dispatching LOGIN action'); }; return <button onClick={handleLogin}>Log In</button>; }; export default NestedComponent; ``` When I click the 'Log In' button, I see the console log confirming the action is dispatched, but when I check the `isAuthenticated` state in the parent component, it still reflects `false`. I've ensured that I'm wrapping my entire app within the `AuthProvider`, so I'm puzzled why the state doesn't seem to update. I've also tried using `useEffect` to monitor the state change, but it doesn't trigger either. Any insights on what could be going wrong or suggestions on debugging this scenario would be greatly appreciated! I'm using React 18.0.0 and a functional component structure. Thanks! Thanks for your help in advance!