formik を使う前に、知っておきたかった点をまとめてみた

import React from 'react'; import { useFormik } from 'formik'; const SignupForm = () => { // Pass the useFormik() hook initial form values and a submit function that will // be called when the form is submitted const formik = useFormik({ initialValues: { email: '', }, onSubmit: values => { alert(JSON.stringify(values, null, 2)); }, }); return ( <form onSubmit={formik.handleSubmit}> <label htmlFor=