import React, { useState } from 'react'; import ReactDOM from 'react-dom'; import useForm from 'react-hook-form'; function App() { const intialValues = { firstName: 'bill', lastName: 'luo', email: 'bluebill1049@hotmail.com', }; const { register, handleSubmit } = useForm(); const [state, update] = useState(intialValues.lastName); const onSubmit = data => { alert(JSON.stringify(data)); }; return (
update(e.target.value)} name="firstName" placeholder="bill" ref={register} />
); } const rootElement = document.getElementById('root'); ReactDOM.render(, rootElement);