React(Javascript & Typescript)でgoogleアカウント認証を行うカスタムhookを作成する - Qiita

import { useEffect, useState } from 'react'; const useGoogleAuth = () => { const [isSignedIn, setIsSignedIn] = useState(null); const [authInstance, setAuthInstance] = useState(null); const [tokenId, setTokenId] = useState(null); useEffect(() => { const initAuth = async () => { const gapi = window.gapi; await gapi.load('auth2', async () => { const auth2 = await gapi.auth2.init({ client_id: 'YOUR_CL