// Listener - Show Event Interception

    // NONE OF THE FOLLOWING WORK
        $('#modal').on('shown.bs.modal', function (e) {
            alert('Modal opened 1');
        });
        $('#modal').on('shown', function (e) {
            alert('Modal opened 2');
        });
      $(window).on('shown.bs.modal', function() {
          alert('Modal opened 3');
        });

<div class="modal modal-dialog" id="modal" tabindex="-1" role="dialog"  aria-hidden="true" >
  <div class="modal-content" style="margin:0 auto;">
     ...
  </div>
</div>