How is useDeferredValue different from useTransition?

useDeferredValue and useTransition are both React hooks introduced in React 18 to handle non-urgent updates, improving the responsiveness of UIs. While they share the goal of prioritizing high-priority updates and deferring less critical ones, they differ in how they are used and their specific purposes.

useDeferredValue

• Works at the level of state values.
• Automatically defers updates when the deferred value changes.
• Does not provide a mechanism to track deferred rendering progress.
• Limited to deferring rendering of the provided value.

useTransition

• Works at the level of state updates.
• Requires explicit wrapping of state updates.
• Provides isPending to track if the transition is ongoing.
• More explicit control over which updates are deferred.