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Zustand · Concept

equality function

createWithEqualityFn makes a React store hook like create, but lets you set a default equality check. The check can prevent re-renders when selected data has not meaningfully changed.

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Syntax

const useSomeStore = createWithEqualityFn(stateCreatorFn, defaultEqualityFn)

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  • create
  • createStore
  • shallow
  • useStore
  • useStoreWithEqualityFn
  • useShallow

Source: createWithEqualityFn - Zustand Docs. Checked 2026-11-03.