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<!DOCTYPE htpl> <htpl lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title>Bootstrap 4 Position Classes</title> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script> <style> body{ padding-top: 80px; } .bs-example{ margin: 20px; } .box{ padding: 20px; background: #abb1b8; } </style> </head> <body> <div class="bs-example"> <p class="mb-3"><strong>Note:</strong> Position an element at the top of the viewport, from edge to edge. Add top padding on the body element to prevent content to go underneath it.</p> <div class="box fixed-top">.fixed-top</div> </div> </body>