mybutton.addEventListener(‘click‘, (e) => { ???let request = new XMLHttpRequest() ???request.onreadystatechange = () => { ???????if(request.readyState === 4) { ???????????console.log(‘请求完毕‘) ???????????if(request.status >= 200 & request.status <= 300) { ???????????????console.log(‘请求成功‘) ???????????????console.log(request.responseText) ???????????????//解析xml ???????????????//let parser = new DOMParser(); ???????????????//let xmlDoc = parser.parseFromString(request.responseText, "text/xml") ???????????????//let body=xmlDoc.getElementsByTagName(‘body‘)[0].textContent ???????????????//console.log(body) ???????????????//解析json ???服务器返回的是字符串 ???????????????????????????let string = request.responseText ???????????????let obj = window.JSON.parse(string) ???????????????console.log(obj) ???????????????console.log(obj.note) ???????????????console.log(obj.note.to) ???????????} else if(request.status >= 400) { ???????????????console.log(‘请求失败‘) ???????????} ???????} ???} ???request.open(‘GET‘, ‘/xxx‘) ???request.send()})使用原生JS发送AJAX请求（XML，JSON解析）
原文地址：https://www.cnblogs.com/ronyjay/p/9189687.html