<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/lib/bootstrap.min.css">
<script src="/lib/jquery-1.12.2.min.js"></script>
<script src="/lib/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Modal Events - show.bs.modal</h2>
<!-- Trigger the modal with a button -->
<button type="button" class="btn btn-info btn-lg" id="myBtn">Open Modal</button>
<!-- Modal -->
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>The <strong>show.bs.modal</strong> event occurs when the modal is about to be shown.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>
<script>
$(document).ready(function(){
$("#myBtn").click(function(){
$("#myModal").modal("show");
});
$("#myModal").on('show.bs.modal', function () {
alert('The modal is about to be shown.');
});
});
</script>
</body>
</html>