如何使用setTimeout打破AJAX轮询 [英] How to break out of AJAX polling done using setTimeout

问题描述

我想实现此答案中提到的AJAX轮询。现在我想在服务器返回特定数据值时中断轮询。怎么做？

I want to implement AJAX polling mentioned in this answer. Now I want to break out of polling when server return particular data value. How to do that?

推荐答案

尝试这样的事情（你改变条件，将continuePolling设置为你需要的任何东西）：

Try something like this (where you change the condition to set continuePolling false to whatever you need):

(function poll() {
var continuePolling = true;
    setTimeout(function() {
        $.ajax({
            url: "/server/api/function",
            type: "GET",
            success: function(data) {
                console.log("polling");
                if (data.length == 0)
                {
                    continuePolling = false;
                }
            },
            dataType: "json",
            complete: function() { if (continuePolling) { poll(); }),
            timeout: 2000
        })
    }, 5000);
})();

这篇关于如何使用setTimeout打破AJAX轮询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！