jQuery: Automatically abort AjaxRequests on Page Unload?

后端 未结 5 1589
有刺的猬
有刺的猬 2020-12-06 05:48

Thanks for reading.

I\'ve noticed that if I have a page that has one or more ajax requests open, and I click a link to leave a page, or refresh it, it will wait for

相关标签:
5条回答
  • 2020-12-06 06:10

    You have to persist all you ajax request and when page is being reloading abort all requests. Sample

    var _requests = [];
    
    var _abortAllRequests = function () {
        $(_requests).each(function (i, xhr) { xhr.abort(); });
    
        _requests = [];
    }
    
    $(window).on("beforeunload", function () { 
        _abortAllRequests();
    });
    

    somewhere in your code

     _requests.push($.ajax(...))
    

    Additionally you can pop done requests using $.ajaxSetup with events ajaxStart ajaxStop, but its up to you

    0 讨论(0)
  • 2020-12-06 06:18

    Think you need window.onunload event plus AjaxRequestX = $.get(...) for each request, maybe keep objects in array and go through them on unload.

    0 讨论(0)
  • 2020-12-06 06:22

    The following code is tested and aborts all outstanding jQuery ajax requests on page unload in Chrome, but it gets used by Edge and IE using clients as well without error.

    Put the following as the first jQuery ready handler:

    $(onPageLoaded)
    

    And put this somewhere accessible:

    function onPageLoaded() {
        var jqxhrs = [];
    
        $(window).bind("beforeunload", function (event) {
            $.each(jqxhrs, function (idx, jqxhr) {
                if (jqxhr)
                    jqxhr.abort();
            });
        });
    
        function registerJqxhr(event, jqxhr, settings) {
            jqxhrs.push(jqxhr);
        }
    
        function unregisterJqxhr(event, jqxhr, settings) {
            var idx = $.inArray(jqxhr, jqxhrs);
            jqxhrs.splice(idx, 1);
        }
    
        $(document).ajaxSend(registerJqxhr);
        $(document).ajaxComplete(unregisterJqxhr);
    };
    
    0 讨论(0)
  • 2020-12-06 06:24

    The $.ajax() jQuery method returns the XMLHttpRequest Object. This means you can apply standard methods on the object, like abort().

    To unload use the built in unload jQuery event method.

    var myajax = $.ajax(...); 
    $(window).unload( function () { myajax.abort(); } );
    
    0 讨论(0)
  • 2020-12-06 06:24

    I just had this issue, I was doing a long-loop in PHP which was being called from $.ajax. My solution was to add session_write_close(); before the long loop.

    My theory is, Chrome requests the next page before cancelling any background ajax requests. If your ajax request is the same _SESSION as the page you're navigating away from AND TO, then you have a deadlock before even your first line of PHP code is hit.

    0 讨论(0)
提交回复
热议问题