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Zustand · Concept

transient updates

Update Zustand state by calling the provided set function. The new top-level fields are shallowly merged into the existing store.

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Syntax

set(partialState)
set((state) => nextPartialState)

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • Immutable state and merging
  • Practice with no store actions
  • How to reset state
  • create
  • useStore

Source: Updating state - Zustand Docs. Checked 2026-11-03.