Driver 01
Redux boilerplate
Types, actions, reducers and selectors spread across several files just to fetch and show a list.
Migration playbook: Redux / Redux Thunk → Zustand and TanStack Query
Redux to Zustand and TanStack Query migration
Separate server state (TanStack Query) from client UI state (Zustand), and delete the actions, reducers and thunks that only existed to move data around.
Migration drivers
Why teams make this move
Driver 02
Server cache mixed with client state
Loading states, errors and cache invalidation handled by hand inside reducers.
Driver 03
Unnecessary re-renders
Poorly memoized selectors re-rendering large parts of the page on small state changes.
Execution sequence
How the migration runs
Each phase ends with a check you can verify — data parity, error rates, latency — and the rollback path is agreed before any traffic moves.
- 01Phase
Server state to TanStack Query
Replacing async thunks with useQuery and useMutation hooks that cache automatically.
- 02Phase
Client state to Zustand
Moving modal toggles, theme preferences and form wizard state into small Zustand stores.
- 03Phase
Incremental Redux removal
Deleting Redux slices feature by feature, with component tests as the safety net.
- 04Phase
Bundle cleanup
Removing redux, react-redux and redux-thunk once nothing depends on them.
Risk prevention
Pitfalls that derail this migration
Risk 01
Recreating Redux in Zustand
Writing action dispatchers in Zustand instead of simple state setters.
Risk 02
Unstable query keys
Object references in TanStack Query keys that change every render and trigger refetch loops.
Risk 03
Optimistic update rollbacks
Not saving the previous query data before an optimistic update, so failures can't roll back.
Before and after
What we measure
We take a baseline before any change and report the same numbers after cutover, from your own tools. They are the evidence of whether the migration worked — not figures promised in advance.
- State code
- Lines of state-management code, before and after
- Re-renders
- Renders per interaction on key screens (React Profiler)
- Bundle size
- Client JavaScript after removing the Redux packages
Questions
Frequently asked migration questions
Server state is asynchronous and shared; client state is synchronous and local. TanStack Query handles caching, deduplication and refetching of server state, which removes most of the code reducers were doing.
Yes. Zustand stores and Redux can run side by side in the same app, so components move one at a time.
Rehearse the cutover before the real one
Tell us about your data volume, traffic and timeline. An engineer will reply within one business day to set up a call about the migration plan and its rollback path.