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Shared Redux Store

In this lesson you will learn shared redux store in Redux, why it matters within micro frontends, and how to use it correctly with clear, copy-ready examples.

Shared Redux Store Overview

At its core, shared redux store is about doing one thing well in Redux. Once you understand the pattern, you can apply it consistently across projects and teams.

Good shared redux store pays off across the whole project: fewer surprises, easier collaboration, and smoother onboarding. The snippet below is a solid starting point.

import { configureStore } from '@reduxjs/toolkit';
import counterReducer from './features/counter/counterSlice';

export const store = configureStore({
  reducer: {
    counter: counterReducer,
  },
});

export type RootState = ReturnType<typeof store.getState>;
export type AppDispatch = typeof store.dispatch;

configureStore sets up the Redux store with good defaults, including Redux DevTools and thunk.

Shared Redux Store Example

const slice = createSlice({ name, initialState, reducers });
const store = configureStore({ reducer: { key: slice.reducer } });
// dispatch(slice.actions.something())
  • Start from a minimal Shared Redux Store example and grow it only as needed.
  • Keep things explicit so Shared Redux Store behaves the same for everyone on the team.
  • Name things clearly so teammates understand your Shared Redux Store at a glance.
  • Verify Shared Redux Store works as expected before relying on it in important work.

Redux Cheatsheet

Quick Redux Toolkit reference related to shared redux store.

Concept Example Purpose
Store configureStore({ reducer }) Hold app state
Slice createSlice({ name, reducers }) State + actions together
Read state useSelector((s) => s.x) Get data in components
Dispatch useDispatch() Send actions
Async createAsyncThunk(...) Handle side effects
Data fetching createApi(...) RTK Query endpoints
Derived data createSelector(...) Memoized computations

How Shared Redux Store Works in Redux

Shared Redux Store follows Redux's predictable data flow: components dispatch actions, reducers compute the next state from the previous state and the action, and subscribed components re-render.

configureStore sets up the Redux store with good defaults, including Redux DevTools and thunk.

  • State lives in a single, read-only store.
  • Actions are the only way to describe a change.
  • Reducers are pure functions that return the next state.
  • Redux Toolkit removes most boilerplate with slices and thunks.

Practical Guidance for Shared Redux Store

In modern apps, shared redux store should use Redux Toolkit rather than hand-written Redux. Keep state minimal, colocate logic in slices, and use RTK Query for server data.

Concern Recommendation
Boilerplate Use Redux Toolkit (createSlice)
Server data Prefer RTK Query over manual thunks
Performance Memoize selectors with createSelector
Types Use typed useAppSelector/useAppDispatch hooks

Common Mistakes

  • Copying shared redux store commands or snippets without understanding what each part does.
  • Skipping edge cases and error handling when using shared redux store.
  • Not verifying the result of shared redux store before moving on.
  • Over-complicating shared redux store before you actually need the extra flexibility.

Key Takeaways

  • Shared Redux Store is a core part of working effectively with Redux.
  • Start small and keep shared redux store focused on a single goal.
  • Apply consistent patterns so shared redux store scales across your project.
  • Practise and document shared redux store to keep your workflow maintainable.

Pro Tip

Bookmark this shared redux store pattern and reuse it. Consistency across your Redux work is worth more than clever one-off solutions.