Bootstrap折叠插件

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = /bootstrap/css/bootstrap.min.css rel = stylesheet>
      <script src = /scripts/jquery.min.js></script>
      <script src = /bootstrap/js/bootstrap.min.js></script>
   </head>
   <body>
      <div class = panel-group id = accordion>
         <div class = panel panel-default>
            <div class = panel-heading>
               <h4 class = panel-title>
                  <a data-toggle = collapse data-parent = #accordion href = #collapseOne>
                     Click me to expand. Click me again to collapse.Section
                  </a>
               </h4>
            </div>
            <div id = collapseOne class = panel-collapse collapse in>
               <div class = panel-body>
                  Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred
                  nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo.
               </div>
            </div>
         </div>
      </div>
   </body>
</html>

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