Question du test React ⚛️

Trouvez l'erreur dans ce code React:

Facile
const SomeComponent = ({ onChange, id }) => {  
    const handleClick = useCallback(() => {  
        onChange(id);  
  }, []);  
 return <button onClick={() => handleClick()}>Click me !</button>;  
};

Quels sont le/les soucis avec ce code?

Auteur: Clément DEVOSStatut : PubliéeQuestion passée 3932 fois
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6
Évaluations de la communauté
developer avatar
Ihor Oherchuk
30/04/2024
Why is "You must absolutely encapsulate the onClick handler in a useCallback, otherwise performance will be impacted" the wrong answer? the button with onClick={()=>handleClick()} will rerender whenever the parent component does, even if handleClick is wrapped in useCallback, we need to write this way onClick={handleClick} to avoid extra rerenders and a negative impact for performance
developer avatar
Auteur anonyme
29/05/2024
I don t know too
developer avatar
Auteur anonyme
15/08/2024
useCallback is required only when performance is impacted, as this function itself adds extra work for each render. if onClick action does not impact performance, it should not be used.