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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/bootstrap.min.css"> <script src="/lib/jquery-1.12.2.min.js"></script> <script src="/lib/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>Collapsible List Group</h2> <div class="panel-group"> <div class="panel panel-default"> <div class="panel-heading"> <h4 class="panel-title"> <a data-toggle="collapse" href="#collapse1">Collapsible list group</a> </h4> </div> <div id="collapse1" class="panel-collapse collapse"> <ul class="list-group"> <li class="list-group-item">One</li> <li class="list-group-item">Two</li> <li class="list-group-item">Three</li> </ul> <div class="panel-footer">Footer</div> </div> </div> </div> </div> </body> </html>