For AI agents: the complete documentation index is available at /next/llms.txt, the full documentation bundle is available at /next/llms-full.txt, and this page is available as Markdown at /next/api/react/Hooks/useEffect.md.
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      • Function: useEffect()

      useEffect(effect: EffectCallback, deps?: DependencyList): void

      Accepts a function that contains imperative, possibly effectful code. The effects run after main thread dom update without blocking it.

      Parameters

      ParameterTypeDescription
      effectEffectCallbackImperative function that can return a cleanup function
      deps?DependencyListIf present, effect will only activate if the values in the list change (using ===).

      Returns

      void

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