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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap 4 $().alert('close') Method</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/css/bootstrap.min.css"> <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.0/dist/js/bootstrap.bundle.min.js"></script> <style> .bs-example{ margin: 20px; } </style> <script> $(document).ready(function(){ $(".close").click(function(){ $("#myAlert").alert('close'); }); }); </script> </head> <body> <div class="bs-example"> <div id="myAlert" class="alert alert-info alert-dismissible fade show"> <strong>Note!</strong> This is a simple example of dismissible alert. <button type="button" class="close">×</button> </div> </div> </body> </html>