boostrap頂部導航條實現多級選單，點選後上一級選單保留狀態
阿新 • • 發佈：2019-02-16
html：
<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <style> body { padding-top: 50px; } .navbar-template { padding: 40px 15px; } </style> <div class="navbar navbar-default navbar-fixed-top" role="navigation"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">NavBar</a> </div> <div class="collapse navbar-collapse"> <ul class="nav navbar-nav"> <li class="active"><a href="#">Home</a></li> <li><a href="https://github.com/fontenele/bootstrap-navbar-dropdowns" target="_blank">GitHub</a></li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Menu 1 <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 1.1]</a></li> <li><a href="#">Another action [Menu 1.1]</a></li> <li><a href="#">Something else here [Menu 1.1]</a></li> <li class="divider"></li> <li><a href="#">Separated link [Menu 1.1]</a></li> <li class="divider"></li> <li><a href="#">One more separated link [Menu 1.1]</a></li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 1.1] <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 1.2]</a></li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 1.2] <b class="caret"></b></a> <ul class="dropdown-menu"> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 1.3] <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 1.4]</a></li> <li><a href="#">Another action [Menu 1.4]</a></li> <li><a href="#">Something else here [Menu 1.4]</a></li> <li class="divider"></li> <li><a href="#">Separated link [Menu 1.4]</a></li> <li class="divider"></li> <li><a href="#">One more separated link [Menu 1.4]</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Menu 2 <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 2.1]</a></li> <li><a href="#">Another action [Menu 2.1]</a></li> <li><a href="#">Something else here [Menu 2.1]</a></li> <li class="divider"></li> <li><a href="#">Separated link [Menu 2.1]</a></li> <li class="divider"></li> <li><a href="#">One more separated link [Menu 2.1]</a></li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 2.1] <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 2.2]</a></li> <li><a href="#">Another action [Menu 2.2]</a></li> <li><a href="#">Something else here [Menu 2.2]</a></li> <li class="divider"></li> <li><a href="#">Separated link [Menu 2.2]</a></li> <li class="divider"></li> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 2.2] <b class="caret"></b></a> <ul class="dropdown-menu"> <li> <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown [Menu 2.3] <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">Action [Menu 2.4]</a></li> <li><a href="#">Another action [Menu 2.4]</a></li> <li><a href="#">Something else here [Menu 2.4]</a></li> <li class="divider"></li> <li><a href="#">Separated link [Menu 2.4]</a></li> <li class="divider"></li> <li><a href="#">One more separated link [Menu 2.4]</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </div><!--/.nav-collapse --> </div> </div> <div class="container"> <div class="navbar-template text-center"> <h1>Bootstrap NavBar (Updated: 15 Nov 2016)</h1> <p class="lead text-info">NavBar with too many childs.</p> </div> </div><!-- /.container -->
js:
$(document).ready(function() { $('.navbar a.dropdown-toggle').on('click', function(e) { var $el = $(this); var $parent = $(this).offsetParent(".dropdown-menu"); $(this).parent("li").toggleClass('open'); if(!$parent.parent().hasClass('nav')) { $el.next().css({"top": $el[0].offsetTop, "left": $parent.outerWidth() - 4}); } $('.nav li.open').not($(this).parents("li")).removeClass("open"); return false; }); });