Bootstrap - 标签插件

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标签在章节Bootstrap 导航元素中介绍。通过组合一些数据属性，您可以轻松创建选项卡界面。使用此插件，您可以通过选项卡或分页中的局部内容面板进行切换，甚至可以通过下拉菜单进行切换。

如果您想单独包含此插件功能，则需要tab.js。否则，如章节Bootstrap 插件概述中所述，您可以包含bootstrap.js或最小化版本的bootstrap.min.js。

用法

您可以通过以下两种方式启用标签：

  • 通过数据属性 - 您需要在锚点中添加data-toggle = "tab"或data-toggle = "pill"。

    向标签ul添加nav和nav-tabs类将应用 Bootstrap 标签样式，而添加nav和nav-pills类将应用分页样式。

<ul class = "nav nav-tabs">
   <li><a href = "#identifier" data-toggle = "tab">Home</a></li>
   ...
</ul>

  • 通过 JavaScript - 您可以使用以下 Javascript 启用标签：

$('#myTab a').click(function (e) {
   e.preventDefault()
   $(this).tab('show')
})

  • 以下是一个激活单个标签的不同方法的示例：

// Select tab by name
$('#myTab a[href = "#profile"]').tab('show')
 
// Select first tab
$('#myTab a:first').tab('show') 

// Select last tab
$('#myTab a:last').tab('show') 

// Select third tab (0-indexed)
$('#myTab li:eq(2) a').tab('show')

淡入淡出效果

要为标签获得淡入淡出效果，请向每个.tab-pane添加.fade类。第一个标签面板还必须具有.in类才能正确淡入初始内容：

<div class = "tab-content">
   <div class = "tab-pane fade in active" id = "home">...</div>
   <div class = "tab-pane fade" id = "svn">...</div>
   <div class = "tab-pane fade" id = "ios">...</div>
   <div class = "tab-pane fade" id = "java">...</div>
</div>

示例

使用数据属性和淡入淡出效果的标签插件示例如下所示：

在线演示 
<ul id = "myTab" class = "nav nav-tabs">
   <li class = "active">
      <a href = "#home" data-toggle = "tab">
         Tutorial Point Home
      </a>
   </li>
   
   <li><a href = "#ios" data-toggle = "tab">iOS</a></li>
	
   <li class = "dropdown">
      <a href = "#" id = "myTabDrop1" class = "dropdown-toggle" data-toggle = "dropdown">
         Java 
         <b class = "caret"></b>
      </a>
      
      <ul class = "dropdown-menu" role = "menu" aria-labelledby = "myTabDrop1">
         <li><a href = "#jmeter" tabindex = "-1" data-toggle = "tab">jmeter</a></li>
         <li><a href = "#ejb" tabindex = "-1" data-toggle = "tab">ejb</a></li>
      </ul>
   </li>
</ul>

<div id = "myTabContent" class = "tab-content">

   <div class = "tab-pane fade in active" id = "home">
      <p>Tutorials Point is a place for beginners in all technical areas.
         This website covers most of the latest technologies and explains each of
         the technology with simple examples.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ios">
      <p>iOS is a mobile operating system developed and distributed 
         by Apple Inc. Originally released in 2007 for the iPhone, iPod Touch,
         and Apple TV. iOS is derived from OS X, with which it shares the 
         Darwin foundation. iOS is Apple's mobile version of the OS X 
         operating system used on Apple computers.</p>
   </div>
   
   <div class = "tab-pane fade" id = "jmeter">
      <p>jMeter is an Open Source testing software. It is 100% pure Java 
         application for load and performance testing.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ejb">
      <p>Enterprise Java Beans (EJB) is a development architecture for 
         building highly scalable and robust enterprise level applications to be 
         deployed on J2EE compliant Application Server such as JBOSS, Web Logic etc.</p>
   </div>
   
</div>

方法

.$().tab - 此方法激活标签元素和内容容器。标签应具有data-target或href属性，指向 DOM 中的容器节点。

<ul class = "nav nav-tabs" id = "myTab">
   <li class = "active"><a href = "#identifier" data-toggle = "tab">Home</a></li>
   .....
</ul>

<div class = "tab-content">
   <div class = "tab-pane active" id = "home">...</div>
   .....
</div>

<script>
   $(function () {
      $('#myTab a:last').tab('show')
   })
</script>

示例

以下示例显示了标签插件方法.tab的使用。在此示例中，激活了第二个标签iOS：

在线演示 
<ul id = "myTab" class = "nav nav-tabs">
   <li class = "active">
      <a href = "#home" data-toggle = "tab">
         Tutorial Point Home
      </a>
   </li>
   
   <li><a href = "#ios" data-toggle = "tab">iOS</a></li>
	
   <li class = "dropdown">
	
      <a href = "#" id = "myTabDrop1" class = "dropdown-toggle" data-toggle = "dropdown">
         Java 
         <b class = "caret"></b>
      </a>
      
      <ul class = "dropdown-menu" role = "menu" aria-labelledby = "myTabDrop1">
         <li>
            <a href = "#jmeter" tabindex = "-1" data-toggle = "tab">
               jmeter
            </a>
         </li>
         
         <li>
            <a href = "#ejb" tabindex = "-1" data-toggle = "tab">
               ejb
            </a>
         </li>
      </ul>
   </li>
</ul>

<div id = "myTabContent" class = "tab-content">

   <div class = "tab-pane fade in active" id = "home">
      <p>Tutorials Point is a place for beginners in all technical areas. 
         This website covers most of the latest technologies and explains each of 
         the technology with simple examples.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ios">
      <p>iOS is a mobile operating system developed and distributed by 
         Apple Inc. Originally released in 2007 for the iPhone, iPod Touch, and 
         Apple TV. iOS is derived from OS X, with which it shares the Darwin 
         foundation. iOS is Apple's mobile version of the OS X operating system 
         used on Apple computers.</p>
   </div>
   
   <div class = "tab-pane fade" id = "jmeter">
      <p>jMeter is an Open Source testing software. It is 100% pure Java 
         application for load and performance testing.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ejb">
      <p>Enterprise Java Beans (EJB) is a development architecture for 
         building highly scalable and robust enterprise level applications to be 
         deployed on J2EE compliant Application Server such as JBOSS, 
         Web Logic etc.</p>
   </div>
   
</div>

<script>
   $(function () {
      $('#myTab li:eq(1) a').tab('show');
   });
</script>

事件

下表列出了与标签插件一起使用的事件。此事件可用于挂钩到函数。

事件 描述 示例
show.bs.tab 此事件在标签显示时触发，但在新标签显示之前。分别使用event.target和event.relatedTarget来定位活动标签和之前的活动标签（如果可用）。 
$('a[data-toggle = "tab"]').on('show.bs.tab', function (e) {
   e.target // activated tab
   e.relatedTarget // previous tab
})
shown.bs.tab 此事件在标签显示后触发。分别使用event.target和event.relatedTarget来定位活动标签和之前的活动标签（如果可用）。 
$('a[data-toggle = "tab"]').on('shown.bs.tab', function (e) {
   e.target // activated tab
   e.relatedTarget // previous tab
})

示例

以下示例显示了标签插件事件的使用。在此示例中，我们将显示当前和以前访问的标签：

在线演示 
<hr>
<p class = "active-tab"><strong>Active Tab</strong>: <span></span></p>
<p class = "previous-tab"><strong>Previous Tab</strong>: <span></span></p>
<hr>

<ul id = "myTab" class = "nav nav-tabs">
   <li class = "active">
      <a href = "#home" data-toggle = "tab">
         Tutorial Point Home
      </a>
   </li>
   
   <li><a href = "#ios" data-toggle = "tab">iOS</a></li>
	
   <li class = "dropdown">
      <a href = "#" id = "myTabDrop1" class = "dropdown-toggle" data-toggle = "dropdown">
         Java 
         <b class = "caret"></b>
      </a>
      
      <ul class = "dropdown-menu" role = "menu" aria-labelledby = "myTabDrop1">
         <li>
            <a href = "#jmeter" tabindex = "-1" data-toggle = "tab">jmeter</a>
         </li>
         
         <li>
            <a href = "#ejb" tabindex = "-1" data-toggle = "tab">ejb</a>
         </li>
      </ul>
   </li>
</ul>

<div id = "myTabContent" class = "tab-content">

   <div class = "tab-pane fade in active" id = "home">
      <p>Tutorials Point is a place for beginners in all technical areas.
         This website covers most of the latest technologies and explains each of 
         the technology with simple examples.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ios">
      <p>iOS is a mobile operating system developed and distributed by 
         Apple Inc. Originally released in 2007 for the iPhone, iPod Touch, and 
         Apple TV. iOS is derived from OS X, with which it shares the Darwin
         foundation. iOS is Apple's mobile version of the OS X operating system
         used on Apple computers.</p>
   </div>
   
   <div class = "tab-pane fade" id = "jmeter">
      <p>jMeter is an Open Source testing software. It is 100% pure Java 
         application for load and performance testing.</p>
   </div>
   
   <div class = "tab-pane fade" id = "ejb">
      <p>Enterprise Java Beans (EJB) is a development architecture for
         building highly scalable and robust enterprise level applications to be 
         deployed on J2EE compliant Application Server such as JBOSS, Web Logic etc.</p>
   </div>
</div>

<script>
   $(function(){
      $('a[data-toggle = "tab"]').on('shown.bs.tab', function (e) {
         // Get the name of active tab
         var activeTab = $(e.target).text(); 
         
         // Get the name of previous tab
         var previousTab = $(e.relatedTarget).text(); 
         
         $(".active-tab span").html(activeTab);
         $(".previous-tab span").html(previousTab);
      });
   });
</script>
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