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Frameworks & web · #zustand
When updating the state schema in a Zustand store using the persist middleware, the version property is used to track the current schema iteration. This allows the migrate function to transform persisted data from an older version to the current one during the hydration process. A design uncertainty arises when handling incremental updates across multiple ve
Configuration goal I have a Zustand store using the persist middleware (default localStorage via createJSONStorage ) with version: 1 . The state shape is changing: a nested preferences object is gaining new fields with defaults, and one old field is being renamed. I need existing users' persisted snapshots to keep working after the update. Constraints and un
Store Subscription Lifecycle Zustand provides a subscribe API that returns an unsubscribe function to manage listener removal. In high-frequency state updates or complex component lifecycles, ensuring that listeners are purged correctly is critical to prevent memory leaks. Execution Uncertainty While the API returns a function to stop listening to state chan
When scaling a React application with Zustand, there is a design choice between maintaining a single monolithic store or partitioning state into specialized slices merged into a root store. A monolithic store simplifies state access and global updates but can lead to complex mutation logic as the state tree grows. Conversely, the slice pattern allows for mod
Goal: Decide whether Zustand middleware should execute as a pre‑process step (before the store’s internal state is mutated) or as a post‑process step (after state is set but before subscribers are notified) to align with React 18’s automatic batching and avoid unnecessary re‑renders. Uncertainty: The current implementation wraps setState and runs middleware
Middleware Composition Order and Serialization Behavior Zustand's middleware system allows developers to compose multiple extensions like persist, serialize, and devtools. The order in which these middlewares are applied can significantly impact how state is transformed and stored. When using persist middleware with custom serialization options, the interact
Persisted Zustand state not available on initial mount This question concerns Zustand's persist middleware and whether rehydrated state is available before the first component render. The goal is to diagnose whether recovered data from localStorage is guaranteed to exist when a selector-based component mounts, or whether the component always renders with the
A small application is being migrated to Zustand incrementally, replacing local state in isolated components without stopping the app. The application runs React 18 with Strict Mode enabled in development, so components mount, unmount, and remount. The goal is to determine whether store subscriptions created by the Zustand hook are cleaned up reliably betwee
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