状态为200时，XDomainRequest未提供响应

Question

状态为200时，XDomainRequest未提供响应

var httpRequest = new XDomainRequest();
httpRequest.open('POST', url, true);
httpRequest.send(xmlDocument);
alert(httpRequest.responseText);
return httpRequest;

它提供的响应文本为空。请给我引路，我找不到了。

Answer 1

尝试执行以下操作：

var httpRequest = new XDomainRequest();
httpRequest.onload=function() {
    alert(httpRequest.responseText);
}
httpRequest.open('POST', url, true);
httpRequest.send(xmlDocument);