👀 Views: 2 💬 Answers: 1 📅 Created: 2025-06-11

react usestate usereducer JavaScript

I've spent hours debugging this and I've been struggling with this for a few days now and could really use some help. I've looked through the documentation and I'm still confused about I'm sure I'm missing something obvious here, but I'm working with an scenario where my React component is not updating as expected when using `useReducer` for state management..... I have a complex state structure that includes nested objects, and despite dispatching updates, the component doesn't re-render. Here's a simplified version of my reducer and component: ```javascript const initialState = { user: { name: '', age: 0 }, loggedIn: false }; function reducer(state, action) { switch (action.type) { case 'LOGIN': return { ...state, loggedIn: true, user: action.payload }; case 'UPDATE_NAME': return { ...state, user: { ...state.user, name: action.payload } }; default: return state; } } const MyComponent = () => { const [state, dispatch] = useReducer(reducer, initialState); const handleLogin = () => { dispatch({ type: 'LOGIN', payload: { name: 'Alice', age: 30 } }); }; const handleNameChange = (newName) => { dispatch({ type: 'UPDATE_NAME', payload: newName }); }; return ( <div> <h1>{state.loggedIn ? `Welcome, ${state.user.name}` : 'Please log in'}</h1> <button onClick={handleLogin}>Log In</button> {state.loggedIn && ( <div> <input value={state.user.name} onChange={(e) => handleNameChange(e.target.value)} /> </div> )} </div> ); }; ``` The question arises when I try to update the name after logging in. The component does not reflect the updated name in the input field. I checked that `handleNameChange` is being called and that the action is dispatched, but it seems like the state is not being properly updated for the re-render. I've also tried using `console.log` to track the state changes and they look correct. I have React version 17.0.2 and am using functional components with hooks. What could be causing this scenario? I'd really appreciate any guidance on this. Thanks in advance! My development environment is Windows. Any examples would be super helpful. I'm working on a REST API that needs to handle this. Any suggestions would be helpful.