http://jsonplaceholder.typicode.com/ 是一个可以做AJAX练习的网站。
JQuery 和ES6 ：
<!DOCTYPE html><html lang="zh-cmn-Hans" class="ua-windows ua-webkit"><head> ???<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> ???<meta name="renderer" content="webkit"> ???<meta name="referrer" content="always"> ?????<script ?src="https://code.jquery.com/jquery-1.12.4.min.js" ?integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ=" ?crossorigin="anonymous"></script> ???<title>json</title> ???<style></style></head><body> ???<div class="people"> ???</div> ???<button id="clash">Clash!</button> <script>window.onload= function(){ ???const clash = document.querySelector(‘#clash‘); ???clash.onclick = getData; ???????function getData(){ ???????$.get(‘http://jsonplaceholder.typicode.com/posts‘,setDom) ????????????let people = document.querySelector(‘.people‘); ???????????????let hasName = people.className.includes(‘got‘)?true:false; ???????????????console.log(hasName); ???????????????function setDom(data){ ???????????????if(!hasName){ ????????????????for(let i=0;i<data.length;i++){ ?????????????????????people.innerHTML +=`${data[i].id} ${data[i].title} `; ???????????????????} ????????????????????people.className +=‘ got‘; ???????????????????}else{ ????????????????????people.className = ‘people‘; ???????????????????????people.innerHTML =‘‘; ???????????????????} ???????????????} ????} ??}</script></body></html>
AJAX jSON资源 ,jsonplaceholder.typicode
原文地址：http://www.cnblogs.com/xinfangzhang/p/7976628.html