👀 Views: 83 💬 Answers: 1 📅 Created: 2025-09-06

react redux legacy JavaScript

I'm prototyping a solution and This might be a silly question, but I'm working on a personal project and This might be a silly question, but While refactoring an older React application that's utilizing Redux for state management, I've run into a situation where middleware isn't behaving as expected... The app was originally set up with thunk for async actions, but now it seems the actions are not dispatching correctly when they're triggered by certain user interactions. I tried debugging the action flow and noticed that some components aren't receiving the updates as anticipated. Here's a snippet of the action creator and the reducer involved: ```javascript // action creator export const fetchData = () => { return async (dispatch) => { const response = await fetch('/api/data'); const data = await response.json(); dispatch({ type: 'FETCH_DATA_SUCCESS', payload: data }); }; }; // reducer const initialState = { data: [], loading: false }; const dataReducer = (state = initialState, action) => { switch (action.type) { case 'FETCH_DATA_SUCCESS': return { ...state, data: action.payload, loading: false }; default: return state; } }; ``` After some assessment, I updated the Redux store setup to ensure that the middleware was properly applied: ```javascript import { createStore, applyMiddleware } from 'redux'; import thunk from 'redux-thunk'; import rootReducer from './reducers'; const store = createStore(rootReducer, applyMiddleware(thunk)); ``` I also sprinkled in some console logs to trace the action dispatches, and it seems like the action is being dispatched but the state isn't updating. Could this be a result of the components not re-rendering appropriately due to a lack of proper state subscriptions? Additionally, I noticed that some components are using old lifecycle methods which haven't been updated for hooks. Is there a chance that this could be causing stale closures that prevent the components from reacting correctly to state changes? Any suggestions on how to ensure that the state is managed correctly and the components are properly re-rendering would be greatly appreciated. Also, if there are specific best practices to follow while working with legacy Redux patterns and transitioning to hooks, I’d love to hear them. Am I missing something obvious? What's the correct way to implement this? What's the best practice here?