Web Front-endJS TutorialjQuery implements the method of monitoring all ajax requests on the pagejQuery implements the method of monitoring all ajax requests on the page
这篇文章主要介绍了jQuery实现监控页面所有ajax请求的方法,涉及jQuery中ajax请求的判定技巧,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了jQuery实现监控页面所有ajax请求的方法。分享给大家供大家参考，具体如下：
你是不是有遇到这样的问题：页面发起两个ajax请求，希望它们都成功以后，再做一个动作？
很容易想到的解决方案是，等其中一个结束以后，再发起另外一个，这个过程用回调函数来完成。
但是，如果其中一个ajax请求的代码不是你写，你改不了，怎么办？
又或者说，你只想知道某个url请求什么时候结束，不想管其他的请求，怎么弄？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
</head>
<body>
<p id="test"></p>
</body>
<script src="js/jquery-1.11.0.min.js"></script>
<!--首先在页面引入jquery的后面，紧接着以下代码：-->
<script>
//前提：所有ajax请求都是用jquery的$.ajax发起的，而非原生的XHR；
var ajaxBack = $.ajax;
var ajaxCount = 0;
var allAjaxDone = function(){$('#test').append('all done!<br>');} //一行代码，就可以知道所有ajax请求什么时候结束
//由于get/post/getJSON等，最后还是调用到ajax，因此只要改ajax函数即可
$.ajax = function(setting){
ajaxCount++;
var cb = setting.complete;
setting.complete = function(){
if($.isFunction(cb)){cb.apply(setting.context, arguments);}
ajaxCount--;
if(ajaxCount==0 && $.isFunction(allAjaxDone)){
allAjaxDone();
}
}
ajaxBack(setting);
}
</script>
<!--以下是别人的script-->
<script>
$.ajax({url: 'js/jquery-1.11.0.min.js', success: function(recv){$('#test').append('别人的ajax请求1，done<br>')}});
</script>
<script>
$.get('css/main.css', null, function(recv){$('#test').append('别人的get请求，done<br>')});
</script>
<script>
$.post('css/main.css', null, function(recv){$('#test').append('别人的post请求，done<br>')});
</script>
</html>其他的相关函数：
$.ajax 中：
error：当出错时调用，可以用来上报错误的请求。
complete：无论成功还是失败都会调用
高版本中:
$.promise
$.when
以上就是本文的全部内容，希望对大家的学习有所帮助，更多相关内容请关注PHP中文网！
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