JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<!-- Button trigger modal -->
  <a data-toggle="modal" href="#my-modal" class="btn btn-primary btn-lg">Launch demo modal</a>

  <!-- Modal -->
  <div class="modal fade" id="my-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
          <h4 class="modal-title">Hello World!</h4>
        </div>
        <div class="modal-body">
          Demo Modal
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
      </div><!-- /.modal-content -->
    </div><!-- /.modal-dialog -->
  </div><!-- /.modal -->

JavaScript

$('#my-modal').on('hidden.bs.modal', function () {
  window.alert('hidden event fired!');
});