<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Bootstrap 实例 - 插入符</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <p>插入符实例 <span class="caret"></span> </p> </body> </html>
