我应该记住自定义 React 钩子的返回对象吗?

Should I memoize the returned object of a custom React hook?

如果我将 useCallback 用于自定义挂钩的方法,我是否也应该记住返回的对象?我假设它不会每次都创建一个新对象,因为它是由记忆方法和基元组成的。

export const useToggle = (args: UseToggleProps) => {
    const initialState=
        args.initialState !== undefined ? args.initialState : false
    const [active, setActive] = useState(initialState)

    const toggleOff = useCallback(() => {
        setActive(false)
    }, [])

    const toggleOn = useCallback(() => {
        setActive(true)
    }, [])

    const toggle = useCallback(() => {
        setActive((active) => !active)
    }, [])

    // Should this also be memoized with useMemo?
    return {
        active,
        toggle,
        toggleOff,
        toggleOn
    }
}

您不需要记忆返回的对象,除非您将对象直接传递给 useEffect 的函数,在这种情况下引用将失败

如果您这样使用它,则无需在 useCallback 上添加额外的记忆层:

const Comp = () => {
   const { toggleOn, toggleOff } = useToggle();

   useEffect(() => {
      console.log('Something here')
   }, [toggleOn]);  
   return (
       <Child toggleOn={toggleOn} toggleOff={toggleOff} />
   )
}

但是像下面代码这样的用法需要对返回的对象进行记忆

const Comp = () => {
   const toggle = useToggle();

   useEffect(() => {
      console.log('Something here')
   }, [toggle]);  
   return (
       <Child toggleHandlers={toggle} />
   )
}