import React, { useEffect, useState } from 'react'; const ChildAdd = () => { const [tel, setTel] = useState(''); async function handleClick() { try { const formdata = new FormData(); formdata.append('tel', tel); axios.post('/api/children/checkTel', formdata) .then(response => { }); } catch (error) { console.log('error', error); } } return (