我有一个非常简单的code：

  $。阿贾克斯（{
  缓存：假的，
  数据类型：HTML，
  完成：功能（jqXHR）{
    执行console.log（jqXHR.responseText）;
  }，
  成功：功能（数据）{
    的console.log（数据）;
  }，
  网址：http://follows.pl/pages/ajaxtest
}）;
 

返回在FF，Chrome和IE8的一些文字，但在IE9它显示了两次不确定。

我已经研究过的开发工具在IE9中，它呈现出正常的响应所以请求工作正常，反应是好的，但变量是不确定的。

响应报头：

 响应HTTP / 1.1 200 OK
缓存控制无缓存
内容类型text / html;字符集：UTF-8
语用无缓存
 

响应

 串（4）测试
 

解决方案

我怀疑这是你的问题：

 内容类型text / html;字符集：UTF-8
 

该值的格式不正确（在'：'之后的字符集是错误的）和IE9不喜欢，只是默默地失败而不是说一些有用的东西。试试这个：

 的Content-Type：text / html的;字符集= UTF-8
 

i have a very simple code:

$.ajax({
  cache: false,
  dataType: 'html',
  complete: function(jqXHR){
    console.log(jqXHR.responseText);
  },
  success: function(data){
    console.log(data);
  },
  url: 'http://follows.pl/pages/ajaxtest'
});

it returns some text in ff, chrome and IE8, but in IE9 it shows twice "undefined".

I've looked into developer tool in IE9, and it showing a normal response so the request works fine, response is fine, but variables are undefined

headers of response:

Response    HTTP/1.1 200 OK
Cache-Control   no-cache
Content-Type    text/html; charset: UTF-8
Pragma  no-cache

response

string(4) "test"

I suspect this is your problem:

Content-Type    text/html; charset: UTF-8

That value is not correctly formatted (the ':' after charset is wrong) and IE9 doesn't like it, but silently fails instead of saying something useful. Try this:

Content-Type:    text/html;charset=utf-8