检测Ajax请求由用户操作中断 [英] Detect Ajax request interrupted by user action

问题描述

我要检测情况下，Ajax调用过程中，然后将其因中断某些用户操作（例如，用户导航到另一个页面）？

I want to detect cases where an Ajax call is in progress and then it is interrupted due to some user action (e.g. user navigating to another page)?

我可以看到，发生这种情况时我onreadystatechange的处理程序被调用当readyState == 4（完成）和状态== 0。

I can see that when this happens my onreadystatechange handler gets called with readyState == 4 (DONE) and status == 0.

现在的问题是，有没有什么办法可以肯定，这确实对应于描述的场景（由于要求中止用户操作）？我想避免屏蔽其他-potentially更dangerous-错误。

The question is, is there any way to be sure that this really corresponds to the described scenario (request aborted due to user action)? I want to avoid masking other -potentially more dangerous- errors.

推荐答案

有关导航到另一个页面，你可以使用 onbeforeunload的事件的用户。

For the user navigating to another page you could use the onbeforeunload event.

例如：

window.onbeforeunload = function() {
    // Check ajax request state and do something accordingly...
}

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