Reactとの連携 その５ Ajax利用の基本 - Qiita

import React from 'react' import ReactDOM from 'react-dom' import PropTypes from 'prop-types' var target_dom = null; #① document.addEventListener('DOMContentLoaded', () => {#② target_dom = document.querySelector('#data');#③ const url = new URL(location.href); #③ let f = url.searchParams.get("name"); #④ if (f == null){ f = ''; } getData(f); }); function getData(f){ let url = "http://localhost:3000/