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<html lang="en"><head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="../../maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <script src="../../ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script> <script src="../../cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script> <script src="../../maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script></head><body><div class="container"> <h2>Close Alerts Via JavaScript</h2> <div class="alert alert-success alert-dismissible" id="myAlert"> <button type="button" class="close">×</button> <strong>Hey you!</strong> Try to close this alert message. </div></div><script>$(document).ready(function(){ $(".close").click(function(){ $("#myAlert").alert("close"); }); $("#myAlert").on('close.bs.alert', function(){ alert('The alert message is about to be closed.');