Concept for managing state on the client side, including session, UI and cached data. Describes design aspects, synchronization and consistency requirements.
Client state denotes information held on the client side of a distributed system to represent user session, UI state or cached data. It reduces server load and supports offline experiences but requires synchronization, consistency strategies and security considerations. Appropriate patterns balance latency, complexity and reliability.
Share of requests served from local client cache.
Time between local change and successful server synchronization.
Frequency of conflicts occurring during synchronization.
Offline-capable PWA stores form data and articles in IndexedDB and synchronizes when online.
React app uses a central store for UI state and persists relevant parts between sessions.
Mobile collaboration app uses CRDTs for local edits and automatic merge on synchronization.
Identify which parts of the state should be held locally and why.
Choose suitable persistence APIs and define storage schemas.
Develop synchronization rules, versioning and conflict policy.
Implement security measures, tests and metric collection.