jquery ajax timeout含义是设置请求超时时间，不涉及服务器响应时间

理解错误：ajax访问超时怎么办？服务器处理时间过长，或网速很慢，服务器返回数据很慢等，于是想到使用timeout设置，网上有类似代码：



经测试：服务器处理方法中线程延时，结果证明，timeout无效，客户端等待响应，status返回sucess。说明， timeout含义是设置请求超时时间，不涉及服务器响应时间！

官网说明

timeout

Type:
Number

Set a timeout (in milliseconds) for the request. This will override any global timeout set with
$.ajaxSetup(). The timeout period starts at the point the$.ajaxcall is made; if several other requests are in progress and the browser has no connections available, it is possible for a request to time out before it can be sent.
In jQuery 1.4.x and below, the XMLHttpRequest object will be in an invalid state if the request times out; accessing any object members may throw an exception.
In Firefox 3.0+ only, script and JSONP requests cannot be cancelled by a timeout; the script will run even if it arrives after the timeout period.