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.
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.
You now understand shared redux store in Redux and how to apply it in real projects. Next, continue with Isolated Redux Stores to keep building your skills.