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React component implementation guide state after using useReducer with nested objects

πŸ‘€ Views: 87 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-05
react usestate usReducer JavaScript

I'm getting frustrated with I'm having an scenario with a React component where I am using `useReducer` to manage state for a nested object, and the component does not seem to update when I dispatch an action... I am trying to update a specific property within a deeply nested object but it looks like the state is not being correctly mutated. Here’s a simplified version of my reducer: ```javascript const initialState = { user: { name: '', age: 0, address: { street: '', city: '' } } }; function reducer(state, action) { switch (action.type) { case 'UPDATE_ADDRESS': return { ...state, user: { ...state.user, address: { ...state.user.address, ...action.payload, }, }, }; default: return state; } } ``` I’m dispatching the action like this: ```javascript const updateAddress = (newAddress) => { dispatch({ type: 'UPDATE_ADDRESS', payload: newAddress }); }; ``` However, after calling `updateAddress({ street: '123 Elm St', city: 'Springfield' })`, my component does not re-render, and I see the previous address values in the UI. I verified that the reducer is being called by adding a `console.log(state)` inside it. Additionally, I’m using React 17.0.2 and the component structure is functional. I suspect it might be related to how I’m spreading the state. Is there something I’m missing that could prevent the component from re-rendering with the updated state? Any suggestions would be greatly appreciated! Any ideas what could be causing this?