Ajax parsexml without jquery

Question

我有一块代码来获取gmail的未读计数。它正在使用jQuery，我想知道如何在没有JavaScript库的情况下使用JavaScript。

$.ajax({
  type: "GET",
  url: "https://mail.google.com/mail/feed/atom",
  dataType: "xml",
  success: parseXml
});
function parseXml(xml)
{
  var result = $(xml).find("fullcount").text();
  alert("count:" + result);
}

Answer 1

尝试此

var  xmlhttp=new XMLHttpRequest();
xmlhttp.setRequestHeader("Access-Control-Allow-Origin","https://mail.google.com");
xmlhttp.open("POST","https://mail.google.com/mail/feed/atom",false,"username","pwd");
xmlhttp.send();
xmlDoc=xmlhttp.responseXML;
var mailCount=xmlDoc.getElementsByTagName("entry").length;

Answer 2

好的，已解决

xhrGmail = new XMLHttpRequest();
xhrGmail.open('GET','https://mail.google.com/mail/feed/atom')
xhrGmail.onload = function() { console.log(xhrGmail.responseText.split("<fullcount>")   [1].split("</fullcount>")[0]) }
xhrGmail.send(null);