How do you lift state up in React?
Move the useState to the common parent of siblings that need the same data. The parent owns the state and passes it down as props, creating a single source of truth and preventing drift between siblings.
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More FAQs in React State Management Interview Questions With Answers
useState for simple independent state. useReducer for complex state with transitions, like a multi-step form. Choose based on complexity and clarity, not performance.
Context for widely-shared, rarely-changed data like auth and theme. Redux for complex, frequently-updated shared state with many interactions. Reach for Redux only when Context is genuinely insufficient.
Each piece of data has one owner. Do not duplicate data between props and state, or across stores. Duplication causes sync bugs when one copy updates and another does not.
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