<meta charset="UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><title>Document</title><link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous"/><!-- Example single danger button --><div class="btn-group"><button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">BDSM</button><div class="dropdown-menu"><a class="dropdown-item" href="#">1</a> <a class="dropdown-item" href="#">2</a> <a class="dropdown-item" href="#">3</a><div class="dropdown-divider"></div><a class="dropdown-item" href="#">Kill</a></div></div><!-- Example single danger button --><div class="btn-group"><button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Asian</button><div class="dropdown-menu"><a class="dropdown-item" href="#">1</a> <a class="dropdown-item" href="#">2</a> <a class="dropdown-item" href="#">3</a><div class="dropdown-divider"></div><a class="dropdown-item" href="#">Black Lives Matter</a></div></div><!-- Example single danger button --><div class="btn-group"><button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Professional</button><div class="dropdown-menu"><a class="dropdown-item" href="#">Xtube</a> <a class="dropdown-item" href="#">PornHub</a> <a class="dropdown-item" href="#">Youtube</a><div class="dropdown-divider"></div><a class="dropdown-item" href="#">国家扫黄打非网</a></div></div><script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script><script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script><script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous"></script><!--!doctype-->
