質問編集履歴
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コードを記載しました。
test
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test
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@@ -8,12 +8,147 @@
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この２つの使い分けやできればこっちを使ったほうがいいなど
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大きな違いはあるのでしょうか。
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### **その状況が発生しているコード**
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**カスタムフック**
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```
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import { useEffect, useMemo, useState } from "react";
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import { useNavigate } from 'react-router';
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import { useCallback } from 'react';
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import axios from 'axios';
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const useProvider =(props) => {
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const[data,setdata]=useState([])
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useEffect(()=>{
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axios.get('http://webservice.recruit.co.jp/hotpepper/large_area/v1/?format=json&key=***')
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.then(function(nn){
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setdata(nn.data.results.large_area)
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})
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.catch(error => console.log(error))
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},[])
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const history=useNavigate()
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const branch1=useCallback((t)=>{
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switch (t.target.value) {
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case 10:
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history('/North')
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break;
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case 20:
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history('/East')
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break;
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case 30:
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history('/West')
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break;
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default:
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return;
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}
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},[])
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const rock= {branch1,data}
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return rock
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};
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export default useProvider;
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```
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**useContext**
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```
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import { createContext, useEffect, useMemo, useState } from "react";
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import { useNavigate } from 'react-router';
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import { useCallback } from 'react';
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import axios from 'axios';
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export const Context = createContext();
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const Provider =(props) => {
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const { children } = props;
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const[data2,setdata2]=useState([])
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useEffect(()=>{
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axios.get('http://webservice.recruit.co.jp/hotpepper/large_area/v1/?format=json&key=***')
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.then(function(nn){
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setdata2(nn.data.results.large_area)
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})
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.catch(error => console.log(error))
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},[])
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const history=useNavigate()
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const branch2=useCallback((t)=>{
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switch (t.target.value) {
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case 10:
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history('/North')
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break;
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case 20:
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history('/East')
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break;
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case 30:
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history('/West')
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break;
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default:
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return;
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}
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},[])
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return (
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<Context.Provider value={{branch2,data2}}>
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{children}
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</Context.Provider>
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)
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};
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export default Provider;
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```
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**関数を使うファイル**
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```
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import { memo } from "react";
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import Menu from '@mui/material/Menu';
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import MenuItem from '@mui/material/MenuItem';
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import style from '../style.module.css'
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import { Context } from "./globalstate";
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import { useContext } from "react";
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import useProvider from "./customfook";
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const Preselect=memo((props)=>{
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// useContextから呼び出し
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const {branch2,data2}=useContext(Context)
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// カスタムフックから呼び出し
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const rock=useProvider()
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return(
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<>
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<button onClick={rock.branch1} value={10}>ボタン1</button>
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<button onClick={branch2} value={20}>ボタン2</button>
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<button onClick={branch2} value={30}>ボタン3</button>
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</>
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)
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})
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export default Preselect;
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```
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