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Zustand · Concept

Immutable state and merging

Zustand updates state immutably. set merges returned values at the top level, while nested objects need an explicit copy and merge.

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Syntax

set((state) => ({ field: nextValue }), replace?)

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  • Updating state
  • Practice with no store actions
  • Maps and sets usage
  • How to reset state

Source: Immutable state and merging - Zustand Docs. Checked 2026-11-03.