<script> function disableFlashMessage() { setTimeout(function () { $("#flashMsg").children().each(function () { $(this).remove(); }); }, 3000); }</script><div id="flashMsg"> {% for label, messages in app.flashes %} {% for message in messages %} <div class="alert alert-{{ label }} alert-dismissible fade show"> {{ message|raw }} {% if message is defined %} <script> disableFlashMessage(); </script>{% endif %} </div> {% endfor %} {% endfor %}</div>