Stop all active ajax requests in jQuery

Every time you create an ajax request you could use a variable to store it:

var request = $.ajax({
    type: 'POST',
    url: 'someurl',
    success: function(result){}
});

Then you can abort the request:

request.abort();

You could use an array keeping track of all pending ajax requests and abort them if necessary.

The following snippet allows you to maintain a list (pool) of request and abort them all if needed. Best to place in the <HEAD> of your html, before any other AJAX calls are made.

<script type="text/javascript">
    $(function() {
        $.xhrPool = [];
        $.xhrPool.abortAll = function() {
            $(this).each(function(i, jqXHR) {   //  cycle through list of recorded connection
                jqXHR.abort();  //  aborts connection
                $.xhrPool.splice(i, 1); //  removes from list by index
            });
        }
        $.ajaxSetup({
            beforeSend: function(jqXHR) { $.xhrPool.push(jqXHR); }, //  annd connection to list
            complete: function(jqXHR) {
                var i = $.xhrPool.indexOf(jqXHR);   //  get index for current connection completed
                if (i > -1) $.xhrPool.splice(i, 1); //  removes from list by index
            }
        });
    })
</script>

Using ajaxSetup is not correct, as is noted on its doc page. It only sets up defaults, and if some requests override them there will be a mess.

I am way late to the party, but just for future reference if someone is looking for a solution to the same problem, here is my go at it, inspired by and largely identical to the previous answers, but more complete

// Automatically cancel unfinished ajax requests 
// when the user navigates elsewhere.
(function($) {
  var xhrPool = [];
  $(document).ajaxSend(function(e, jqXHR, options){
    xhrPool.push(jqXHR);
  });
  $(document).ajaxComplete(function(e, jqXHR, options) {
    xhrPool = $.grep(xhrPool, function(x){return x!=jqXHR});
  });
  var abort = function() {
    $.each(xhrPool, function(idx, jqXHR) {
      jqXHR.abort();
    });
  };

  var oldbeforeunload = window.onbeforeunload;
  window.onbeforeunload = function() {
    var r = oldbeforeunload ? oldbeforeunload() : undefined;
    if (r == undefined) {
      // only cancel requests if there is no prompt to stay on the page
      // if there is a prompt, it will likely give the requests enough time to finish
      abort();
    }
    return r;
  }
})(jQuery);

Stop all active ajax requests in jQuery

Tags:

Ajax

Jquery

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