<!doctype html>
<html lang="en">

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link href="<https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css>" rel="stylesheet">

    <title>Hello, world!</title>
</head>

<body>
    <!-- Button trigger modal -->
    <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
        Launch demo modal
    </button>
    
    <!-- Modal -->
    <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
            <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
            <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                <span aria-hidden="true">&times;</span>
            </button>
            </div>
            <div class="modal-body">
            ...
            </div>
            <div class="modal-footer">
            <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
            <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
        </div>
    </div>
    <!-- JavaScript -->
    <script src="<https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js>"></script>
</body>

</html>