Whenever an Ajax request completes, jQuery checks whether there are any other outstanding Ajax requests. If none remain, jQuery triggers the ajaxStop event. Any and all handlers that have been registered with the .ajaxStop() method are executed at this time. The ajaxStop event is also triggered if the last outstanding Ajax request is cancelled by returning false within the beforeSend callback function.

To observe this method in action, set up a basic Ajax load request:

<div class="trigger">Trigger</div>
<div class="result"></div>
<div class="log"></div>

Attach the event handler to the document:

$( document ).ajaxStop(function() {
  $( ".log" ).text( "Triggered ajaxStop handler." );
});

Now, make an Ajax request using any jQuery method:

$( ".trigger" ).click(function() {
  $( ".result" ).load( "ajax/test.html" );
});

When the user clicks the element with class trigger and the Ajax request completes, the log message is displayed.

• As of jQuery 1.9, all the handlers for the jQuery global Ajax events, including those added with the .ajaxStop() method, must be attached to document.
• If $.ajax() or $.ajaxSetup() is called with the global option set to false, the .ajaxStop() method will not fire.