作为@JamWaffles答案的补充:

As an addition to @JamWaffles answer:

您可以仅使用return;退出该函数，而不用调用request.abort();.否则，您将对相同的数据发出两个AJAX请求=服务器不必要的负载.然后，您应该在成功和错误回调中使用request = null;重置请求对象.

You may just exit the function with return; instead of calling request.abort();. Otherwise you will make two AJAX requests for the same data = unnecessary load for your server. You should then, however, reset the request object with request = null; in the success and error callback.

PS.会将其作为评论发布，但我不能.

PS. Would post this as a comment, but I can't.