When do you need Redux, Zustand or another state library?
Model answer
When many components across the app share state, update logic is complex, or you need dev tools and predictable updates. Redux Toolkit is a structured, popular choice for large apps. Zustand is a small, simple store. Context plus useReducer is fine for modest cases.
Do not add a library until props, lifting state and Context stop being enough.
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TanStack Query (React Query): Fetching, Caching and Updating Server Data in the course React.js Full Course: Beginner to Advanced.
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