用BootStrap實現響應式導航欄，我會對其中的一些樣式進行說明。
先上代碼，是一個很簡單的Demo。
<!doctype html> <html> <head> <head> <meta charset = "utf-8"/> <meta name = "viewport" content = "width-device=width,initial = 1.0"/> <!--bootstrap.css --> <link href = "css/bootstrap.css" rel = "stylesheet" type = "text/css"/> <!-- bootstrap.js --> <script src = "js/jquery-1.9.1.js"> </script> <!-- bootstrap.js --> <script src = "js/bootstrap.js"></script> </head> <body> <nav class="navbar navbar-default" role="navigation"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#menu"> <span class="sr-only">展開導航</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">網站標題</a> </div> <div class="collapse navbar-collapse" id="menu"> <ul class="nav navbar-nav"> <li class="active"><a href="#">首頁</a></li> <li><a href="#">導航標題1</a></li> <li><a href="#">導航標題2</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">下拉菜單 <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">下拉菜單1</a></li> <li class="divider"></li> <li><a href="#">下拉菜單2</a></li> <li class="divider"></li> </ul> </li> </ul> </div> </nav> </body> </html>
首先引入基本樣式和JS插件：
<link href = "css/bootstrap.css" rel = "stylesheet" type = "text/css"/> <!-- bootstrap.js --> <script src = "js/jquery-1.9.1.js"> </script> <!-- bootstrap.js --> <script src = "js/bootstrap.js"></script>
定義響應式的樣式：
<div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#menu">
<span class="sr-only">展開導航</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="#">網站標題</a> </div>
其中：data-toggle="collapse"是數據切換，而collapse是動畫效果，data-target="#menu"的作用則是選擇展示數據的目標，#menu指的便是：
<div class="collapse navbar-collapse" id="menu"> <ul class="nav navbar-nav"> <li class="active"><a href="#">首頁</a></li> <li><a href="#">導航標題1</a></li> <li><a href="#">導航標題2</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">下拉菜單 <b class="caret"></b></a> <ul class="dropdown-menu"> <li><a href="#">下拉菜單1</a></li> <li class="divider"></li> <li><a href="#">下拉菜單2</a></li> <li class="divider"></li> </ul> </li> </ul> </div>
class = "navbar navbar-toggle"則是菜單按鈕的樣式，其中也可以繼續嵌套下拉菜單。