Bootstrap navigation bar


The navigation bar is a great feature and a prominent feature of a Bootstrap website. The navigation bar serves as the responsive foundational component of the navigation header in your app or website. The navigation bar collapses in mobile viewports and expands horizontally as the available viewport width increases. At the core of the Bootstrap navigation bar, the navigation bar includes the site name and basic navigation definition styles.

Default navigation bar

The steps to create a default navigation bar are as follows:

  • ##Add class # to the <nav> tag ##.navbar, .navbar-default

    .

    • Adding
  • role="navigation"

    to the above element will help increase accessibility.

    • Add a header class
  • .navbar-header

    to the <div> element, which contains < with class navbar-brand ;a> element. This will make the text appear larger.

    • To add a link to the navigation bar, simply add an unordered list with class
  • .nav, .navbar-nav

    .

    • The following example demonstrates this:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 默认的导航栏</title>
  <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java 
               <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>


</body>
</html>

Running Example»
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Responsive navigation bar

In order to add responsive features to the navigation bar, the content you want to collapse must be wrapped In a <div> with classes

.collapse, .navbar-collapse

. The collapsed navigation bar is actually a button with class .navbar-toggle and two data- elements. The first is data-toggle, which tells JavaScript what to do with the button, and the second is data-target, which indicates which element to switch to. Three <span> with class .icon-bar create what is called a hamburger button. These will switch to elements in .nav-collapse <div>. In order to achieve these features, you must include the Bootstrap Collapse plugin. The following example demonstrates this:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 响应式的导航栏</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.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="#example-navbar-collapse">
         <span class="sr-only">切换导航</span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
         <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div class="collapse navbar-collapse" id="example-navbar-collapse">
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>


</body>
</html>

Run Example»
Click "Run instance" button to view the online instance

The form in the navigation bar

The form in the navigation bar does not use the default class mentioned in the Bootstrap form chapter, it uses

.navbar-form

class. This ensures proper vertical alignment of the form and collapse behavior in narrower viewports. Use the alignment options (which are explained in detail in the Component Alignment section) to decide where the content in the navigation bar is placed. The following example demonstrates this:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 导航栏中的表单</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <form class="navbar-form navbar-left" role="search">
         <div class="form-group">
            <input type="text" class="form-control" placeholder="Search">
         </div>
         <button type="submit" class="btn btn-default">提交</button>
      </form>    
   </div>
</nav>


</body>
</html>


Run Instance»

Click the "Run Instance" button to view the online instance

Button in the navigation bar

You can use class .navbar-btn Adds a button to a <button> element that is not inside a <form>, centering the button vertically on the navbar. .navbar-btn Can be used on <a> and <input> elements.

Do not use .navbar-btn on an <a> element inside .navbar-nav because it is not a standard button class.

The following example demonstrates this:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 导航栏中的按钮</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <form class="navbar-form navbar-left" role="search">
         <div class="form-group">
            <input type="text" class="form-control" placeholder="Search">
         </div>
         <button type="submit" class="btn btn-default">提交按钮</button>
      </form>    
      <button type="button" class="btn btn-default navbar-btn">
         导航栏按钮
      </button>
   </div>
</nav>

</body>
</html>

Run Example»

Click "Run instance" button to view the online instance

Text in the navigation bar

If you need to include a text string in the navigation, use class .navbar-text. This is typically used in conjunction with the <p> tag, ensuring appropriate leading and coloring. The following example demonstrates this:

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 导航栏中的文本</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <p class="navbar-text">Signed in as Thomas</p>
   </div>
</nav>

</body>
</html>

Run Instance»

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Non-navigation link

If you do not want to use standard links within the regular navbar navigation component, then please use class navbar-link Add appropriate colors to the default and inverted navigation bar options, as shown in the following example:

Example

<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8"> 
   <title>Bootstrap 实例 - 非导航链接</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
   <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
   <script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">php中文网</a>
   </div>
   <div>
      <p class="navbar-text navbar-right"> 
         <a href="#" class="navbar-link">php</a> 登录
      </p>
   </div>
</nav>

</body>
</html>

Run Example »

Click the "Run Instance" button to view the online instance

Component alignment

You can use the utility class .navbar-left or .navbar-right Align navigation links, forms, buttons, or text components in the navbar to the left or right. Both classes add CSS floats in the specified direction. The following example demonstrates this:

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 组件对齐方式</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <!--向左对齐-->
      <ul class="nav navbar-nav navbar-left">
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java 
               <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
      <form class="navbar-form navbar-left" role="search">
         <button type="submit" class="btn btn-default">
            向左对齐-提交按钮  
         </button>
      </form> 
      <p class="navbar-text navbar-left">向左对齐-文本</p>
      <!--向右对齐-->
      <ul class="nav navbar-nav navbar-right">
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
      <form class="navbar-form navbar-right" role="search">
         <button type="submit" class="btn btn-default">
            向右对齐-提交按钮
         </button>
      </form> 
      <p class="navbar-text navbar-right">向右对齐-文本</p>
   </div>
</nav>

</body>
</html>

Run Instance»

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Fixed to top

Bootstrap navigation bar can be positioned dynamically. By default, it is a block-level element that is positioned based on where it is placed in the HTML. With some helper classes, you can place it at the top or bottom of the page, or you can make it a static navigation bar that scrolls with the page.

If you want the navbar to be fixed at the top of the page, add class .navbar-fixed-top to .navbar class. The following example demonstrates this:

To prevent the navigation bar from intersecting the top of other content in the body of the page, add at least 50 pixels of padding to the <body> tag. The value of the margin can be set according to your needs.

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 固定到顶部</title>
  <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>

</body>
</html>

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Click the "Run instance" button to view the online instance

Fixed to bottom

If you want the navigation bar to be fixed at the bottom of the page, add class .navbar-fixed-bottom to .navbar class . The following example demonstrates this:

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 固定到底部</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default navbar-fixed-bottom" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>

</body>
</html>

Run Instance»

Click the "Run Instance" button to view Online example

Static top

To create a navigation bar that can scroll with the page, please add the .navbar-static-top class. This class does not require padding to be added to <body>.

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 静态的顶部</title>
  <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-default navbar-static-top" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>

</body>
</html>

Run instance»

Click the "Run instance" button to view the online instance

Inverted Navigation Bar

To create an inverted navigation bar with white text on a black background, simply add .navbar-inverse to the .navbar class class will do, as shown in the example below:

To prevent the navigation bar from intersecting the top of other content in the body of the page, add at least 50 pixels of padding to the <body> tag Padding, the value of padding can be set according to your needs.

Instance

<!DOCTYPE html>
<html>
<head>
   <title>Bootstrap 实例 - 倒置的导航栏</title>
   <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<nav class="navbar navbar-inverse" role="navigation">
   <div class="navbar-header">
      <a class="navbar-brand" href="#">W3Cschool</a>
   </div>
   <div>
      <ul class="nav navbar-nav">
         <li class="active"><a href="#">iOS</a></li>
         <li><a href="#">SVN</a></li>
         <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown">
               Java <b class="caret"></b>
            </a>
            <ul class="dropdown-menu">
               <li><a href="#">jmeter</a></li>
               <li><a href="#">EJB</a></li>
               <li><a href="#">Jasper Report</a></li>
               <li class="divider"></li>
               <li><a href="#">分离的链接</a></li>
               <li class="divider"></li>
               <li><a href="#">另一个分离的链接</a></li>
            </ul>
         </li>
      </ul>
   </div>
</nav>

</body>
</html>

Run instance »

Click the "Run instance" button to view the online instance