useDeferredValue
useDeferredValue is a React Hook that returns a deferred version of a value so updates based on it can be rendered at lower priority.
React Hooks in Action: With Suspense and Concurrent Mode
useDeferredValue is a React Hook that returns a deferred version of a value so rendering based on it can lag behind more urgent updates.
- How it is used
- Improves perceived responsiveness by keeping useful UI visible while slower rendering or data loading catches up.
- How deep it goes
- Explains the old-versus-new decision, pending feedback, component placement, and a complete UsersPage example, but not implementation internals.
- Examples
- Uses a bookings Users page where a selected user updates immediately while a Suspense-wrapped details panel retains the previous user.
- What you can do after
- Apply it by passing current values to urgent components and deferred values to components that may suspend or render slowly.
Read how React Hooks in Action: With Suspense and Concurrent Mode explains useDeferredValue →
React Quickly, Second Edition
useDeferredValue is a React Hook that returns a deferred version of a value so updates depending on it can be rendered at lower priority.
- How it is used
- Prioritizes immediate interface feedback over nonessential rendering work such as spell-check highlighting.
- How deep it goes
- Defines low-priority updates and gives one UI scenario, but stops short of implementation details and further explanation.
- Examples
- Uses a spell-check button whose document error highlighting may trail the user’s click.
- What you can do after
- Apply it via React to separate urgent interface updates from lower-priority rendering work.
Read how React Quickly, Second Edition explains useDeferredValue →
Related concepts
- React hookkind of · A React Hook is a function-based API that enables function components to access state, effects, context, and other React capabilities.
- concurrent renderingused by · Concurrent rendering is a React rendering behavior that allows rendering work to be interrupted, prioritized, and resumed so urgent updates can proceed responsively.
- memoizationuses · Memoization is an optimization technique that stores computation results with their inputs so equivalent later evaluations can reuse them without recomputation.
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