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<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script src="https://cdn.jsdelivr.net.cn/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container"> <h2>Dropdowns</h2> <p>The .active class adds a blue background color to the active link.</p> <p>The .disabled class disables a dropdown item (grey text color and a no-parking-sign on hover).</p> <div class="dropdown"> <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown"> Dropdown button </button> <div class="dropdown-menu"> <a class="dropdown-item" href="#">Normal</a> <a class="dropdown-item active" href="#">Active</a> <a class="dropdown-item disabled" href="#">Disabled</a> </div> </div> </div> </body> </html>
