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Issue with useEffect not triggering on Redux state change in Next.js app

๐Ÿ‘€ Views: 99 ๐Ÿ’ฌ Answers: 1 ๐Ÿ“… Created: 2025-05-31
react redux next.js hooks javascript

Can someone help me understand I've looked through the documentation and I'm still confused about Quick question that's been bugging me - I'm working on a Next.js application where I'm trying to perform an effect whenever a specific piece of Redux state changes... I'm using React hooks with the Redux Toolkit. However, the `useEffect` hook is not triggering as expected when the Redux state updates. Hereโ€™s a simplified version of my Redux slice: ```javascript import { createSlice } from '@reduxjs/toolkit'; const initialState = { count: 0 }; const counterSlice = createSlice({ name: 'counter', initialState, reducers: { increment: (state) => { state.count += 1; }, }, }); export const { increment } = counterSlice.actions; export default counterSlice.reducer; ``` In my component, I have set up the `useEffect` like this: ```javascript import { useEffect } from 'react'; import { useSelector, useDispatch } from 'react-redux'; import { increment } from '../slices/counterSlice'; const CounterComponent = () => { const count = useSelector((state) => state.counter.count); const dispatch = useDispatch(); useEffect(() => { console.log('Count changed to:', count); // Some side effect logic here }, [count]); return ( <div> <p>Count: {count}</p> <button onClick={() => dispatch(increment())}>Increment</button> </div> ); }; export default CounterComponent; ``` Despite the `count` value updating correctly and rendering the new value, the `useEffect` does not seem to be triggering whenever the count changes. Iโ€™ve checked that the Redux store is correctly configured and that the component re-renders with the updated count. I also verified that React and Redux Toolkit are up to date (React 18.0.0 and Redux Toolkit 1.8.0). The console log inside the `useEffect` simply doesn't execute. I even tried lifting the state up and isolating this component to see if it was a scoping issue, but nothing worked. Is there a particular reason why `useEffect` might not trigger on state changes in this setup? Is there something Iโ€™m missing related to Reactโ€™s lifecycle or Redux integration? Any insights would be greatly appreciated! What's the best practice here?