Tab "shown" event not firing - Twitter Bootstrap

Question

When a tab changes, I'm attempting to fire an ajax call. However, I can't even seem to get this basic test to work:

<ul class="nav nav-tabs">
   <li class="">
      <a data-toggle="tab" href="#gqs-uploader" id="gqs-uploader-btn">Upload</a>
   </li>
   <li class="active">
      <a data-toggle="tab" href="#gqs-results" id="gqs-results-btn">Results</a>
   </li>
   <li class="">
      <a data-toggle="tab" href="#gqs-download" id="gqs-download-btn">Download</a>
   </li>
</ul>

And the javascript:

(function ( $ ) {
    "use strict";

    $(function () {
        $(document).on('shown', 'a[data-toggle="tab"]', function (e) {
            alert('TAB CHANGED');
        });
    }); 

}(jQuery));

When ANY tab changes, it should send me an alert.

Why is this simple example not working?

The basic example in the docs does not work either. The entire event (even button clicks) seems invisible - I can't seem to catch it any way.

Answer 1

Try this

$(document).on('shown.bs.tab', 'a[data-toggle="tab"]', function (e) {
    alert('TAB CHANGED');
})

Answer 2

Try this code, check working FIDDLE

<ul class="nav nav-tabs">
   <li class="">
      <a data-toggle="tab" href="#gqs-uploader" id="gqs-uploader-btn">Upload</a>
   </li>
   <li class="active">
      <a data-toggle="tab" href="#gqs-results" id="gqs-results-btn">Results</a>
   </li>
   <li class="">
      <a data-toggle="tab" href="#gqs-download" id="gqs-download-btn">Download</a>
   </li>
</ul>

<script>
    (function ( $ ) {
        $(function () {
            $(document).on('shown.bs.tab', 'a[data-toggle="tab"]', function (e) {
                alert('TAB CHANGED');
            });
        }); 
    }(jQuery));
</script>

Answer 3

This is from the bootstrap documentation: http://getbootstrap.com/javascript/#tabs

$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
  e.target // newly activated tab
  e.relatedTarget // previous active tab
})

You have 4 events: hide, show, hidden, shown