源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <title>Bootstrap 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <ol class="breadcrumb"> <li class="breadcrumb-item active">Home</li> </ol> <ol class="breadcrumb"> <li class="breadcrumb-item"><a href="#">Home</a></li> <li class="breadcrumb-item active">Library</li> </ol> <ol class="breadcrumb"> <li class="breadcrumb-item"><a href="#">Home</a></li> <li class="breadcrumb-item"><a href="#">Library</a></li> <li class="breadcrumb-item active">Data</li> </ol> </body> </html>
运行结果