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法律研究设置使用 Bootstrap 下拉的菜单
菜单也可以构建为向上下拉，而不是向下下拉。若要实现此功能，只需将 .dropup 添加到父级 .btn-group 容器即可。
你可以尝试运行以下代码设置菜单向上下拉 −
实例
<!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> <p>Dropdown</p> <div class = "btn-group" style = "margin-left:50px; margin-top:10px"> <button type = "button" class = "btn btn-default dropdown-toggle btn-xs" data-toggle = "dropdown"> Subject <span class = "caret"></span> </button> <ul class = "dropdown-menu" role = "menu"> <li><a href = "#">Programming</a></li> <li><a href = "#">Web Dev</a></li> <li><a href = "#">Database</a></li> <li><a href = "#">Networking</a></li> </ul> </div> <p>Dropup</p> <div class = "row" style = "margin-left:50px; margin-top:120px"> <div class = "btn-group dropup"> <button type = "button" class = "btn btn-primary dropdown-toggle" data-toggle = "dropdown"> Subject <span class = "caret"></span> </button> <ul class = "dropdown-menu" role = "menu"> <li><a href = "#">Programming</a></li> <li><a href = "#">Web Dev</a></li> <li><a href = "#">Database</a></li> <li><a href = "#">Networking</a></li> </ul> </div> </div> </body> </html>
更新于: 12-06-2020
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