默认使用Bootstrap中的'collapse in'类显示可折叠的内容-
<!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 = "container"> <h2>More Quizzes</h2> <a href = "#test" class = "btn btn-info" data-toggle = "collapse">More</a> <div id = "test" class = "collapse in"> We have quizzes on Java, PHP, Ruby, C, C++, etc. as well. </div> </div> </body> </html>