尝试从 react 示例中实现自定义钩子：https : //reactjs.org/docs/hooks-faq.html#how-to-get-the-previous-props-or-state，但出现以下错误：

错误：

Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app

useEffect当我尝试将其作为自定义 hook 导入时会发生错误usePrevious。

我尝试了以下操作：验证 react-dom 和 react 在同一版本上 react-dom@16.8.5 react@16.8.5

确认我只有一个版本的 React

我也相信代码没有违反任何钩子规则。

还尝试在 stackoverflow 上查看相关问题。

代码：

// file: use-previous.js

import { useRef, useEffect} from "React"

export const usePrevious = (value) =>  {

    const ref = useRef();
    useEffect(() => {
      ref.current = value;
    });




    return ref.current;
}

// file: layout.js

import React, { useState, useEffect } from "react"

import Header from "./header/header"

import { useFacetsData } from "../hooks/use-facets-data"
import { usePrevious } from "../hooks/use-previous"


export default ({ children, ...props }) => {

    const [ searchValue, setSearchValue ] = useState("")

    const [ facetsSelected, setFacetsSelected ] = useState([])

    const facets = useFacetsData()


    const oldSearchValue = usePrevious(searchValue)
    // const oldFacetsSelected = usePrevious(facetsSelected)

    useEffect(() => {
        // if new searchvalue or new facetvalue

        // if (searchValue !== oldSearchValue || facetsSelected !== oldFacetsSelected) makeSearch()
    }) 

    function makeSearch() {
        console.log('make search')

        // move to searchpage 
    }

    function handleSearchChange(search) {
        setSearchValue(search)
    }

    function handleFacetChange(facets) {
        setFacetsSelected(facets)
    }   

    return   (
        <div>
            {/* Main sticky header */}
            <Header 
                facets={ facets } 
                onSearchChange={ handleSearchChange } 
                onFacetChange={ handleFacetChange } >
            </Header>

            {/* route content */}
           {React.cloneElement(children, { facets })}
        </div>
    )
}