概覽

單個還是全部引入

JavaScript 插件可以單個引入(使用 Bootstrap 提供的單個 *.js 文件),或者一次性全部引入(使用 bootstrap.js 或壓縮版的 bootstrap.min.js)。

建議使用壓縮版的 JavaScript 文件

bootstrap.jsbootstrap.min.js 都包含了所有插件,你在使用時,只需選擇一個引入頁面就可以了。

插件之間的依賴關系

某些插件和 CSS 組件依賴于其它插件。如果你是單個引入每個插件的,請確保在文檔中檢查插件之間的依賴關系。注意,所有插件都依賴 jQuery (也就是說,jQuery必須在所有插件之前引入頁面)。 bower.json 文件中列出了 Bootstrap 所支持的 jQuery 版本。

data 屬性

你可以僅僅通過 data 屬性 API 就能使用所有的 Bootstrap 插件,無需寫一行 JavaScript 代碼。這是 Bootstrap 中的一等 API,也應該是你的首選方式。

話又說回來,在某些情況下可能需要將此功能關閉。因此,我們還提供了關閉 data 屬性 API 的方法,即解除以 data-api 為命名空間并綁定在文檔上的事件。就像下面這樣:

$(document).off('.data-api')

另外,如果是針對某個特定的插件,只需在 data-api 前面添加那個插件的名稱作為命名空間,如下:

$(document).off('.alert.data-api')

Only one plugin per element via data attributes

Don't use data attributes from multiple plugins on the same element. For example, a button cannot both have a tooltip and toggle a modal. To accomplish this, use a wrapping element.

編程方式的 API

我們為所有 Bootstrap 插件提供了純 JavaScript 方式的 API。所有公開的 API 都是支持單獨或鏈式調用方式,并且返回其所操作的元素集合(注:和jQuery的調用形式一致)。

$('.btn.danger').button('toggle').addClass('fat')

所有方法都可以接受一個可選的 option 對象作為參數,或者一個代表特定方法的字符串,或者什么也不提供(在這種情況下,插件將會以默認值初始化):

$('#myModal').modal()                      // 以默認值初始化
$('#myModal').modal({ keyboard: false })   // initialized with no keyboard
$('#myModal').modal('show')                // 初始化后立即調用 show 方法

每個插件還通過 Constructor 屬性暴露了其原始的構造函數:$.fn.popover.Constructor。如果你想獲取某個插件的實例,可以直接通過頁面元素獲取:$('[rel="popover"]').data('popover')

默認設置

每個插件都可以通過修改其自身的 Constructor.DEFAULTS 對象從而改變插件的默認設置:

$.fn.modal.Constructor.DEFAULTS.keyboard = false // 將模態框插件的 `keyboard` 默認選參數置為 false

避免命名空間沖突

某些時候可能需要將 Bootstrap 插件與其他 UI 框架共同使用。在這種情況下,命名空間沖突隨時可能發生。如果不幸發生了這種情況,你可以通過調用插件的 .noConflict 方法恢復其原始值。

var bootstrapButton = $.fn.button.noConflict() // return $.fn.button to previously assigned value
$.fn.bootstrapBtn = bootstrapButton            // give $().bootstrapBtn the Bootstrap functionality

事件

Bootstrap 為大部分插件所具有的動作提供了自定義事件。一般來說,這些事件都有不定式和過去式兩種動詞的命名形式,例如,不定式形式的動詞(例如 show)表示其在事件開始時被觸發;而過去式動詞(例如 shown )表示在動作執行完畢之后被觸發。

從 3.0.0 版本開始,所有 Bootstrap 事件的名稱都采用命名空間方式。

所有以不定式形式的動詞命名的事件都提供了 preventDefault 功能。這就賦予你在動作開始執行前將其停止的能力。

$('#myModal').on('show.bs.modal', function (e) {
  if (!data) return e.preventDefault() // 阻止模態框的展示
})

版本號

每個 Bootstrap 的 jQuery 插件的版本號都可以通過插件的構造函數上的 VERSION 屬性獲取到。例如工具提示框(tooltip)插件:

$.fn.tooltip.Constructor.VERSION // => "3.3.7"

未對禁用 JavaScript 的瀏覽器提供補救措施

Bootstrap 插件未對禁用 JavaScript 的瀏覽器提供補救措施。如果你對這種情況下的用戶體驗很關心的話,請添加 <noscript> 標簽向你的用戶進行解釋(并告訴他們如何啟用 JavaScript),或者按照你自己的方式提供補救措施。

第三方工具庫

Bootstrap 官方不提供對第三方 JavaScript 工具庫的支持,例如 Prototype 或 jQuery UI。除了 .noConflict 和為事件名稱添加命名空間,還可能會有兼容性方面的問題,這就需要你自己來處理了。

過渡效果 transition.js

關于過渡效果

對于簡單的過渡效果,只需將 transition.js 和其它 JS 文件一起引入即可。如果你使用的是編譯(或壓縮)版的 bootstrap.js 文件,就無需再單獨將其引入了。

包含的內容

Transition.js 是針對 transitionEnd 事件的一個基本輔助工具,也是對 CSS 過渡效果的模擬。它被其它插件用來檢測當前瀏覽器對是否支持 CSS 的過渡效果。

禁用過度效果

通過下面的 JavaScript 代碼可以在全局范圍禁用過渡效果,并且必須將此代碼放在 transition.js (或 bootstrap.jsbootstrap.min.js)后面,確保在 js 文件加載完畢后再執行下面的代碼:

$.support.transition = false

模態框 modal.js

模態框經過了優化,更加靈活,以彈出對話框的形式出現,具有最小和最實用的功能集。

不支持同時打開多個模態框

千萬不要在一個模態框上重疊另一個模態框。要想同時支持多個模態框,需要自己寫額外的代碼來實現。

模態框的 HTML 代碼放置的位置

務必將模態框的 HTML 代碼放在文檔的最高層級內(也就是說,盡量作為 body 標簽的直接子元素),以避免其他組件影響模態框的展現和/或功能。

對于移動設備的附加說明

這里提供了在移動設備上使用模態框有一些附加說明。請參考瀏覽器支持章節。

Due to how HTML5 defines its semantics, the autofocus HTML attribute has no effect in Bootstrap modals. To achieve the same effect, use some custom JavaScript:

$('#myModal').on('shown.bs.modal', function () {
  $('#myInput').focus()
})

實例

靜態實例

以下模態框包含了模態框的頭、體和一組放置于底部的按鈕。

<div class="modal fade" tabindex="-1" role="dialog">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title">Modal title</h4>
      </div>
      <div class="modal-body">
        <p>One fine body&hellip;</p>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->

動態實例

點擊下面的按鈕即可通過 JavaScript 啟動一個模態框。此模態框將從上到下、逐漸浮現到頁面前。

<!-- Button trigger modal -->
<button type="button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title</h4>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

增強模態框的可訪問性

務必為 .modal 添加 role="dialog"aria-labelledby="..." 屬性,用于指向模態框的標題欄;為 .modal-dialog 添加 aria-hidden="true" 屬性。

另外,你還應該通過 aria-describedby 屬性為模態框 .modal 添加描述性信息。

嵌入 YouTube 視頻(天朝無用)

在模態框中嵌入 YouTube 視頻需要增加一些額外的 JavaScript 代碼,用于自動停止重放等功能,這些代碼并沒有在 Bootstrap 中提供。請參考這份發布在 Stack Overflow 上的文章

可選尺寸

模態框提供了兩個可選尺寸,通過為 .modal-dialog 增加一個樣式調整類實現。

<!-- Large modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target=".bs-example-modal-lg">Large modal</button>

<div class="modal fade bs-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel">
  <div class="modal-dialog modal-lg" role="document">
    <div class="modal-content">
      ...
    </div>
  </div>
</div>

<!-- Small modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target=".bs-example-modal-sm">Small modal</button>

<div class="modal fade bs-example-modal-sm" tabindex="-1" role="dialog" aria-labelledby="mySmallModalLabel">
  <div class="modal-dialog modal-sm" role="document">
    <div class="modal-content">
      ...
    </div>
  </div>
</div>

禁止動畫效果

如果你不需要模態框彈出時的動畫效果(淡入淡出效果),刪掉 .fade 類即可。

<div class="modal" tabindex="-1" role="dialog" aria-labelledby="...">
  ...
</div>

Using the grid system

To take advantage of the Bootstrap grid system within a modal, just nest .rows within the .modal-body and then use the normal grid system classes.

<div class="modal fade" tabindex="-1" role="dialog" aria-labelledby="gridSystemModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="gridSystemModalLabel">Modal title</h4>
      </div>
      <div class="modal-body">
        <div class="row">
          <div class="col-md-4">.col-md-4</div>
          <div class="col-md-4 col-md-offset-4">.col-md-4 .col-md-offset-4</div>
        </div>
        <div class="row">
          <div class="col-md-3 col-md-offset-3">.col-md-3 .col-md-offset-3</div>
          <div class="col-md-2 col-md-offset-4">.col-md-2 .col-md-offset-4</div>
        </div>
        <div class="row">
          <div class="col-md-6 col-md-offset-3">.col-md-6 .col-md-offset-3</div>
        </div>
        <div class="row">
          <div class="col-sm-9">
            Level 1: .col-sm-9
            <div class="row">
              <div class="col-xs-8 col-sm-6">
                Level 2: .col-xs-8 .col-sm-6
              </div>
              <div class="col-xs-4 col-sm-6">
                Level 2: .col-xs-4 .col-sm-6
              </div>
            </div>
          </div>
        </div>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->

Have a bunch of buttons that all trigger the same modal, just with slightly different contents? Use event.relatedTarget and HTML data-* attributes (possibly via jQuery) to vary the contents of the modal depending on which button was clicked. See the Modal Events docs for details on relatedTarget,

...more buttons...
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@mdo">Open modal for @mdo</button>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@fat">Open modal for @fat</button>
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@getbootstrap">Open modal for @getbootstrap</button>
...more buttons...

<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="exampleModalLabel">New message</h4>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="recipient-name" class="control-label">Recipient:</label>
            <input type="text" class="form-control" id="recipient-name">
          </div>
          <div class="form-group">
            <label for="message-text" class="control-label">Message:</label>
            <textarea class="form-control" id="message-text"></textarea>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Send message</button>
      </div>
    </div>
  </div>
</div>
$('#exampleModal').on('show.bs.modal', function (event) {
  var button = $(event.relatedTarget) // Button that triggered the modal
  var recipient = button.data('whatever') // Extract info from data-* attributes
  // If necessary, you could initiate an AJAX request here (and then do the updating in a callback).
  // Update the modal's content. We'll use jQuery here, but you could use a data binding library or other methods instead.
  var modal = $(this)
  modal.find('.modal-title').text('New message to ' + recipient)
  modal.find('.modal-body input').val(recipient)
})

用法

通過 data 屬性或 JavaScript 調用模態框插件,可以根據需要動態展示隱藏的內容。模態框彈出時還會為 <body> 元素添加 .modal-open 類,從而覆蓋頁面默認的滾動行為,并且還會自動生成一個 .modal-backdrop 元素用于提供一個可點擊的區域,點擊此區域就即可關閉模態框。

通過 data 屬性

不需寫 JavaScript 代碼也可激活模態框。通過在一個起控制器作用的元素(例如:按鈕)上添加 data-toggle="modal" 屬性,或者 data-target="#foo" 屬性,再或者 href="#foo" 屬性,用于指向被控制的模態框。

<button type="button" data-toggle="modal" data-target="#myModal">Launch modal</button>

通過 JavaScript 調用

只需一行 JavaScript 代碼,即可通過元素的 id myModal 調用模態框:

$('#myModal').modal(options)

參數

可以將選項通過 data 屬性或 JavaScript 代碼傳遞。對于 data 屬性,需要將參數名稱放到 data- 之后,例如 data-backdrop=""

名稱 類型 默認值 描述
backdrop boolean 或 字符串 'static' true Includes a modal-backdrop element. Alternatively, specify static for a backdrop which doesn't close the modal on click.
keyboard boolean true 鍵盤上的 esc 鍵被按下時關閉模態框。
show boolean true 模態框初始化之后就立即顯示出來。
remote path false

This option is deprecated since v3.3.0 and has been removed in v4. We recommend instead using client-side templating or a data binding framework, or calling jQuery.load yourself.

如果提供的是 URL,將利用 jQuery 的 load 方法從此 URL 地址加載要展示的內容(只加載一次)并插入 .modal-content 內。如果使用的是 data 屬性 API,還可以利用 href 屬性指定內容來源地址。下面是一個實例:

<a data-toggle="modal" href="remote.html" data-target="#modal">Click me</a>

方法

.modal(options)

將頁面中的某塊內容作為模態框激活。接受可選參數 object

$('#myModal').modal({
  keyboard: false
})

.modal('toggle')

手動打開或關閉模態框。在模態框顯示或隱藏之前返回到主調函數中(也就是,在觸發 shown.bs.modalhidden.bs.modal 事件之前)。

$('#myModal').modal('toggle')

.modal('show')

手動打開模態框。在模態框顯示之前返回到主調函數中 (也就是,在觸發 shown.bs.modal 事件之前)。

$('#myModal').modal('show')

.modal('hide')

手動隱藏模態框。在模態框隱藏之前返回到主調函數中 (也就是,在觸發 hidden.bs.modal 事件之前)。

$('#myModal').modal('hide')

.modal('handleUpdate')

Readjusts the modal's positioning to counter a scrollbar in case one should appear, which would make the modal jump to the left.

Only needed when the height of the modal changes while it is open.

$('#myModal').modal('handleUpdate')

事件

Bootstrap 的模態框類提供了一些事件用于監聽并執行你自己的代碼。

All modal events are fired at the modal itself (i.e. at the <div class="modal">).

事件類型 描述
show.bs.modal show 方法調用之后立即觸發該事件。如果是通過點擊某個作為觸發器的元素,則此元素可以通過事件的 relatedTarget 屬性進行訪問。
shown.bs.modal 此事件在模態框已經顯示出來(并且同時在 CSS 過渡效果完成)之后被觸發。如果是通過點擊某個作為觸發器的元素,則此元素可以通過事件的 relatedTarget 屬性進行訪問。
hide.bs.modal hide 方法調用之后立即觸發該事件。
hidden.bs.modal 此事件在模態框被隱藏(并且同時在 CSS 過渡效果完成)之后被觸發。
loaded.bs.modal 遠端的數據源加載完數據之后觸發該事件。
$('#myModal').on('hidden.bs.modal', function (e) {
  // do something...
})

Dropdowns dropdown.js

Add dropdown menus to nearly anything with this simple plugin, including the navbar, tabs, and pills.

Within a navbar

Within pills

Via data attributes or JavaScript, the dropdown plugin toggles hidden content (dropdown menus) by toggling the .open class on the parent list item.

On mobile devices, opening a dropdown adds a .dropdown-backdrop as a tap area for closing dropdown menus when tapping outside the menu, a requirement for proper iOS support. This means that switching from an open dropdown menu to a different dropdown menu requires an extra tap on mobile.

Note: The data-toggle="dropdown" attribute is relied on for closing dropdown menus at an application level, so it's a good idea to always use it.

Via data attributes

Add data-toggle="dropdown" to a link or button to toggle a dropdown.

<div class="dropdown">
  <button id="dLabel" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Dropdown trigger
    <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" aria-labelledby="dLabel">
    ...
  </ul>
</div>

To keep URLs intact with link buttons, use the data-target attribute instead of href="#".

<div class="dropdown">
  <a id="dLabel" data-target="#" href="http://example.com" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
    Dropdown trigger
    <span class="caret"></span>
  </a>

  <ul class="dropdown-menu" aria-labelledby="dLabel">
    ...
  </ul>
</div>

Via JavaScript

Call the dropdowns via JavaScript:

$('.dropdown-toggle').dropdown()

data-toggle="dropdown" still required

Regardless of whether you call your dropdown via JavaScript or instead use the data-api, data-toggle="dropdown" is always required to be present on the dropdown's trigger element.

None

$().dropdown('toggle')

Toggles the dropdown menu of a given navbar or tabbed navigation.

All dropdown events are fired at the .dropdown-menu's parent element.

All dropdown events have a relatedTarget property, whose value is the toggling anchor element.

Event Type Description
show.bs.dropdown This event fires immediately when the show instance method is called.
shown.bs.dropdown This event is fired when the dropdown has been made visible to the user (will wait for CSS transitions, to complete).
hide.bs.dropdown This event is fired immediately when the hide instance method has been called.
hidden.bs.dropdown This event is fired when the dropdown has finished being hidden from the user (will wait for CSS transitions, to complete).
$('#myDropdown').on('show.bs.dropdown', function () {
  // do something…
})

滾動監聽 scrollspy.js

導航條實例

滾動監聽插件是用來根據滾動條所處的位置來自動更新導航項的。如下所示,滾動導航條下面的區域并關注導航項的變化。下拉菜單中的條目也會自動高亮顯示。

@fat

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg hoodie minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.

@mdo

Veniam marfa mustache skateboard, adipisicing fugiat velit pitchfork beard. Freegan beard aliqua cupidatat mcsweeney's vero. Cupidatat four loko nisi, ea helvetica nulla carles. Tattooed cosby sweater food truck, mcsweeney's quis non freegan vinyl. Lo-fi wes anderson +1 sartorial. Carles non aesthetic exercitation quis gentrify. Brooklyn adipisicing craft beer vice keytar deserunt.

one

Occaecat commodo aliqua delectus. Fap craft beer deserunt skateboard ea. Lomo bicycle rights adipisicing banh mi, velit ea sunt next level locavore single-origin coffee in magna veniam. High life id vinyl, echo park consequat quis aliquip banh mi pitchfork. Vero VHS est adipisicing. Consectetur nisi DIY minim messenger bag. Cred ex in, sustainable delectus consectetur fanny pack iphone.

two

In incididunt echo park, officia deserunt mcsweeney's proident master cleanse thundercats sapiente veniam. Excepteur VHS elit, proident shoreditch +1 biodiesel laborum craft beer. Single-origin coffee wayfarers irure four loko, cupidatat terry richardson master cleanse. Assumenda you probably haven't heard of them art party fanny pack, tattooed nulla cardigan tempor ad. Proident wolf nesciunt sartorial keffiyeh eu banh mi sustainable. Elit wolf voluptate, lo-fi ea portland before they sold out four loko. Locavore enim nostrud mlkshk brooklyn nesciunt.

three

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用法

依賴 Bootstrap 的導航組件

滾動監聽插件依賴 Bootstrap 的導航組件 用于高亮顯示當前激活的鏈接。

Resolvable ID targets required

Navbar links must have resolvable id targets. For example, a <a href="#home">home</a> must correspond to something in the DOM like <div id="home"></div>.

Non-:visible target elements ignored

Target elements that are not :visible according to jQuery will be ignored and their corresponding nav items will never be highlighted.

需要相對定位(relative positioning)

無論何種實現方式,滾動監聽都需要被監聽的組件是 position: relative; 即相對定位方式。大多數時候是監聽 <body> 元素。When scrollspying on elements other than the <body>, be sure to have a height set and overflow-y: scroll; applied.

通過 data 屬性調用

To easily add scrollspy behavior to your topbar navigation, add data-spy="scroll" to the element you want to spy on (most typically this would be the <body>). Then add the data-target attribute with the ID or class of the parent element of any Bootstrap .nav component.

body {
  position: relative;
}
<body data-spy="scroll" data-target="#navbar-example">
  ...
  <div id="navbar-example">
    <ul class="nav nav-tabs" role="tablist">
      ...
    </ul>
  </div>
  ...
</body>

通過 JavaScript 調用

在 CSS 中添加 position: relative; 之后,通過 JavaScript 代碼啟動滾動監聽插件:

$('body').scrollspy({ target: '#navbar-example' })

方法

.scrollspy('refresh')

當使用滾動監聽插件的同時在 DOM 中添加或刪除元素后,你需要像下面這樣調用此刷新( refresh) 方法:

$('[data-spy="scroll"]').each(function () {
  var $spy = $(this).scrollspy('refresh')
})

參數

可以通過 data 屬性或 JavaScript 傳遞參數。對于 data 屬性,其名稱是將參數名附著到 data- 后面組成,例如 data-offset=""

名稱 類型 默認值 描述
offset number 10 計算滾動位置時相對于頂部的偏移量(像素數)。

事件

事件類型 描述
activate.bs.scrollspy 每當一個新條目被激活后都將由滾動監聽插件觸發此事件。
$('#myScrollspy').on('activate.bs.scrollspy', function () {
  // do something…
})

Togglable tabs tab.js

Example tabs

Add quick, dynamic tab functionality to transition through panes of local content, even via dropdown menus. Nested tabs are not supported.

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Extends tabbed navigation

This plugin extends the tabbed navigation component to add tabbable areas.

Usage

Enable tabbable tabs via JavaScript (each tab needs to be activated individually):

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

You can activate individual tabs in several ways:

$('#myTabs a[href="#profile"]').tab('show') // Select tab by name
$('#myTabs a:first').tab('show') // Select first tab
$('#myTabs a:last').tab('show') // Select last tab
$('#myTabs li:eq(2) a').tab('show') // Select third tab (0-indexed)

Markup

You can activate a tab or pill navigation without writing any JavaScript by simply specifying data-toggle="tab" or data-toggle="pill" on an element. Adding the nav and nav-tabs classes to the tab ul will apply the Bootstrap tab styling, while adding the nav and nav-pills classes will apply pill styling.

<div>

  <!-- Nav tabs -->
  <ul class="nav nav-tabs" role="tablist">
    <li role="presentation" class="active"><a href="#home" aria-controls="home" role="tab" data-toggle="tab">Home</a></li>
    <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">Profile</a></li>
    <li role="presentation"><a href="#messages" aria-controls="messages" role="tab" data-toggle="tab">Messages</a></li>
    <li role="presentation"><a href="#settings" aria-controls="settings" role="tab" data-toggle="tab">Settings</a></li>
  </ul>

  <!-- Tab panes -->
  <div class="tab-content">
    <div role="tabpanel" class="tab-pane active" id="home">...</div>
    <div role="tabpanel" class="tab-pane" id="profile">...</div>
    <div role="tabpanel" class="tab-pane" id="messages">...</div>
    <div role="tabpanel" class="tab-pane" id="settings">...</div>
  </div>

</div>

Fade effect

To make tabs fade in, add .fade to each .tab-pane. The first tab pane must also have .in to make the initial content visible.

<div class="tab-content">
  <div role="tabpanel" class="tab-pane fade in active" id="home">...</div>
  <div role="tabpanel" class="tab-pane fade" id="profile">...</div>
  <div role="tabpanel" class="tab-pane fade" id="messages">...</div>
  <div role="tabpanel" class="tab-pane fade" id="settings">...</div>
</div>

Methods

$().tab

Activates a tab element and content container. Tab should have either a data-target or an href targeting a container node in the DOM. In the above examples, the tabs are the <a>s with data-toggle="tab" attributes.

.tab('show')

Selects the given tab and shows its associated content. Any other tab that was previously selected becomes unselected and its associated content is hidden. Returns to the caller before the tab pane has actually been shown (i.e. before the shown.bs.tab event occurs).

$('#someTab').tab('show')

Events

When showing a new tab, the events fire in the following order:

  1. hide.bs.tab (on the current active tab)
  2. show.bs.tab (on the to-be-shown tab)
  3. hidden.bs.tab (on the previous active tab, the same one as for the hide.bs.tab event)
  4. shown.bs.tab (on the newly-active just-shown tab, the same one as for the show.bs.tab event)

If no tab was already active, then the hide.bs.tab and hidden.bs.tab events will not be fired.

Event Type Description
show.bs.tab This event fires on tab show, but before the new tab has been shown. Use event.target and event.relatedTarget to target the active tab and the previous active tab (if available) respectively.
shown.bs.tab This event fires on tab show after a tab has been shown. Use event.target and event.relatedTarget to target the active tab and the previous active tab (if available) respectively.
hide.bs.tab This event fires when a new tab is to be shown (and thus the previous active tab is to be hidden). Use event.target and event.relatedTarget to target the current active tab and the new soon-to-be-active tab, respectively.
hidden.bs.tab This event fires after a new tab is shown (and thus the previous active tab is hidden). Use event.target and event.relatedTarget to target the previous active tab and the new active tab, respectively.
$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
  e.target // newly activated tab
  e.relatedTarget // previous active tab
})

Tooltips tooltip.js

Inspired by the excellent jQuery.tipsy plugin written by Jason Frame; Tooltips are an updated version, which don't rely on images, use CSS3 for animations, and data-attributes for local title storage.

Tooltips with zero-length titles are never displayed.

Examples

Hover over the links below to see tooltips:

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Static tooltip

Four options are available: top, right, bottom, and left aligned.

Four directions

<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="left" title="Tooltip on left">Tooltip on left</button>

<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="top" title="Tooltip on top">Tooltip on top</button>

<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Tooltip on bottom">Tooltip on bottom</button>

<button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="right" title="Tooltip on right">Tooltip on right</button>

Opt-in functionality

For performance reasons, the Tooltip and Popover data-apis are opt-in, meaning you must initialize them yourself.

One way to initialize all tooltips on a page would be to select them by their data-toggle attribute:

$(function () {
  $('[data-toggle="tooltip"]').tooltip()
})

Usage

The tooltip plugin generates content and markup on demand, and by default places tooltips after their trigger element.

Trigger the tooltip via JavaScript:

$('#example').tooltip(options)

Markup

The required markup for a tooltip is only a data attribute and title on the HTML element you wish to have a tooltip. The generated markup of a tooltip is rather simple, though it does require a position (by default, set to top by the plugin).

<!-- HTML to write -->
<a href="#" data-toggle="tooltip" title="Some tooltip text!">Hover over me</a>

<!-- Generated markup by the plugin -->
<div class="tooltip top" role="tooltip">
  <div class="tooltip-arrow"></div>
  <div class="tooltip-inner">
    Some tooltip text!
  </div>
</div>

Multiple-line links

Sometimes you want to add a tooltip to a hyperlink that wraps multiple lines. The default behavior of the tooltip plugin is to center it horizontally and vertically. Add white-space: nowrap; to your anchors to avoid this.

Tooltips in button groups, input groups, and tables require special setting

When using tooltips on elements within a .btn-group or an .input-group, or on table-related elements (<td>, <th>, <tr>, <thead>, <tbody>, <tfoot>), you'll have to specify the option container: 'body' (documented below) to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip is triggered).

Don't try to show tooltips on hidden elements

Invoking $(...).tooltip('show') when the target element is display: none; will cause the tooltip to be incorrectly positioned.

Accessible tooltips for keyboard and assistive technology users

For users navigating with a keyboard, and in particular users of assistive technologies, you should only add tooltips to keyboard-focusable elements such as links, form controls, or any arbitrary element with a tabindex="0" attribute.

Tooltips on disabled elements require wrapper elements

To add a tooltip to a disabled or .disabled element, put the element inside of a <div> and apply the tooltip to that <div> instead.

Options

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-animation="".

Name Type Default Description
animation boolean true Apply a CSS fade transition to the tooltip
container string | false false

Appends the tooltip to a specific element. Example: container: 'body'. This option is particularly useful in that it allows you to position the tooltip in the flow of the document near the triggering element -?which will prevent the tooltip from floating away from the triggering element during a window resize.

delay number | object 0

Delay showing and hiding the tooltip (ms) - does not apply to manual trigger type

If a number is supplied, delay is applied to both hide/show

Object structure is: delay: { "show": 500, "hide": 100 }

html boolean false Insert HTML into the tooltip. If false, jQuery's text method will be used to insert content into the DOM. Use text if you're worried about XSS attacks.
placement string | function 'top'

How to position the tooltip - top | bottom | left | right | auto.
When "auto" is specified, it will dynamically reorient the tooltip. For example, if placement is "auto left", the tooltip will display to the left when possible, otherwise it will display right.

When a function is used to determine the placement, it is called with the tooltip DOM node as its first argument and the triggering element DOM node as its second. The this context is set to the tooltip instance.

selector string false If a selector is provided, tooltip objects will be delegated to the specified targets. In practice, this is used to enable dynamic HTML content to have tooltips added. See this and an informative example.
template string '<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>'

Base HTML to use when creating the tooltip.

The tooltip's title will be injected into the .tooltip-inner.

.tooltip-arrow will become the tooltip's arrow.

The outermost wrapper element should have the .tooltip class.

title string | function ''

Default title value if title attribute isn't present.

If a function is given, it will be called with its this reference set to the element that the tooltip is attached to.

trigger string 'hover focus' How tooltip is triggered - click | hover | focus | manual. You may pass multiple triggers; separate them with a space. manual cannot be combined with any other trigger.
viewport string | object | function { selector: 'body', padding: 0 }

Keeps the tooltip within the bounds of this element. Example: viewport: '#viewport' or { "selector": "#viewport", "padding": 0 }

If a function is given, it is called with the triggering element DOM node as its only argument. The this context is set to the tooltip instance.

Data attributes for individual tooltips

Options for individual tooltips can alternatively be specified through the use of data attributes, as explained above.

Methods

$().tooltip(options)

Attaches a tooltip handler to an element collection.

.tooltip('show')

Reveals an element's tooltip. Returns to the caller before the tooltip has actually been shown (i.e. before the shown.bs.tooltip event occurs). This is considered a "manual" triggering of the tooltip. Tooltips with zero-length titles are never displayed.

$('#element').tooltip('show')

.tooltip('hide')

Hides an element's tooltip. Returns to the caller before the tooltip has actually been hidden (i.e. before the hidden.bs.tooltip event occurs). This is considered a "manual" triggering of the tooltip.

$('#element').tooltip('hide')

.tooltip('toggle')

Toggles an element's tooltip. Returns to the caller before the tooltip has actually been shown or hidden (i.e. before the shown.bs.tooltip or hidden.bs.tooltip event occurs). This is considered a "manual" triggering of the tooltip.

$('#element').tooltip('toggle')

.tooltip('destroy')

Hides and destroys an element's tooltip. Tooltips that use delegation (which are created using the selector option) cannot be individually destroyed on descendant trigger elements.

$('#element').tooltip('destroy')

Events

Event Type Description
show.bs.tooltip This event fires immediately when the show instance method is called.
shown.bs.tooltip This event is fired when the tooltip has been made visible to the user (will wait for CSS transitions to complete).
hide.bs.tooltip This event is fired immediately when the hide instance method has been called.
hidden.bs.tooltip This event is fired when the tooltip has finished being hidden from the user (will wait for CSS transitions to complete).
inserted.bs.tooltip This event is fired after the show.bs.tooltip event when the tooltip template has been added to the DOM.
$('#myTooltip').on('hidden.bs.tooltip', function () {
  // do something…
})

彈出框 popover.js

為任意元素添加一小塊浮層,就像 iPad 上一樣,用于存放非主要信息。

彈出框的標題和內容的長度都是零的話將永遠不會被顯示出來。

插件依賴

彈出框依賴 工具提示插件 ,因此,如果你定制了 Bootstrap,一定要注意將依賴的插件編譯進去。

初始化

由于性能的原因,工具提示和彈出框的 data 編程接口(data api)是必須要手動初始化的

在一個頁面上一次性初始化所有彈出框的方式是通過 data-toggle 屬性選中他們:

$(function () {
  $('[data-toggle="popover"]').popover()
})

Popovers in button groups, input groups, and tables require special setting

When using popovers on elements within a .btn-group or an .input-group, or on table-related elements (<td>, <th>, <tr>, <thead>, <tbody>, <tfoot>), you'll have to specify the option container: 'body' (documented below) to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the popover is triggered).

Don't try to show popovers on hidden elements

Invoking $(...).popover('show') when the target element is display: none; will cause the popover to be incorrectly positioned.

Popovers on disabled elements require wrapper elements

To add a popover to a disabled or .disabled element, put the element inside of a <div> and apply the popover to that <div> instead.

Multiple-line links

Sometimes you want to add a popover to a hyperlink that wraps multiple lines. The default behavior of the popover plugin is to center it horizontally and vertically. Add white-space: nowrap; to your anchors to avoid this.

實例

靜態彈出框

4個可能的彈出方向:頂部、右側、底部和左側。

Popover 頂部

Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.

Popover 右側

Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.

Popover 頂部

Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.

Popover 左側

Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.

實例演示

<button type="button" class="btn btn-lg btn-danger" data-toggle="popover" title="Popover title" data-content="And here's some amazing content. It's very engaging. Right?">點我彈出/隱藏彈出框</button>

4個彈出方向

<button type="button" class="btn btn-default" data-container="body" data-toggle="popover" data-placement="left" data-content="Vivamus sagittis lacus vel augue laoreet rutrum faucibus.">
  Popover on 左側
</button>

<button type="button" class="btn btn-default" data-container="body" data-toggle="popover" data-placement="top" data-content="Vivamus sagittis lacus vel augue laoreet rutrum faucibus.">
  Popover on 頂部
</button>

<button type="button" class="btn btn-default" data-container="body" data-toggle="popover" data-placement="bottom" data-content="Vivamus
sagittis lacus vel augue laoreet rutrum faucibus.">
  Popover on 底部
</button>

<button type="button" class="btn btn-default" data-container="body" data-toggle="popover" data-placement="right" data-content="Vivamus sagittis lacus vel augue laoreet rutrum faucibus.">
  Popover on 右側
</button>

點擊并讓彈出框消失

通過使用 focus 觸發器可以在用戶點擊彈出框是讓其消失。

實現“點擊并讓彈出框消失”的效果需要一些額外的代碼

為了更好的跨瀏覽器和跨平臺效果,你必須使用 <a> 標簽,不能使用 <button> 標簽,并且,還必須包含 role="button"tabindex 屬性。

<a tabindex="0" class="btn btn-lg btn-danger" role="button" data-toggle="popover" data-trigger="focus" title="Dismissible popover" data-content="And here's some amazing content. It's very engaging. Right?">可消失的彈出框</a>

用法

通過 JavaScript 代碼啟動彈出框:

$('#example').popover(options)

參數

可以通過 data 屬性或 JavaScript 傳遞參數。對于 data 屬性,將參數名附著到 data- 后面,例如 data-animation=""

名稱 類型 默認值 描述
animation boolean true 為彈出框賦予淡出的 CSS 動畫效果。
container string | false false

Appends the popover to a specific element. Example: container: 'body'. This option is particularly useful in that it allows you to position the popover in the flow of the document near the triggering element -?which will prevent the popover from floating away from the triggering element during a window resize.

content string | function ''

Default content value if data-content attribute isn't present.

If a function is given, it will be called with its this reference set to the element that the popover is attached to.

delay number | object 0

Delay showing and hiding the popover (ms) - does not apply to manual trigger type

If a number is supplied, delay is applied to both hide/show

Object structure is: delay: { "show": 500, "hide": 100 }

html boolean false Insert HTML into the popover. If false, jQuery's text method will be used to insert content into the DOM. Use text if you're worried about XSS attacks.
placement string | function 'right'

How to position the popover - top | bottom | left | right | auto.
When "auto" is specified, it will dynamically reorient the popover. For example, if placement is "auto left", the popover will display to the left when possible, otherwise it will display right.

When a function is used to determine the placement, it is called with the popover DOM node as its first argument and the triggering element DOM node as its second. The this context is set to the popover instance.

selector string false If a selector is provided, popover objects will be delegated to the specified targets. In practice, this is used to enable dynamic HTML content to have popovers added. See this and an informative example.
template string '<div class="popover" role="tooltip"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'

Base HTML to use when creating the popover.

The popover's title will be injected into the .popover-title.

The popover's content will be injected into the .popover-content.

.arrow will become the popover's arrow.

The outermost wrapper element should have the .popover class.

title string | function ''

Default title value if title attribute isn't present.

If a function is given, it will be called with its this reference set to the element that the popover is attached to.

trigger string 'click' How popover is triggered - click | hover | focus | manual. You may pass multiple triggers; separate them with a space. manual cannot be combined with any other trigger.
viewport string | object | function { selector: 'body', padding: 0 }

Keeps the popover within the bounds of this element. Example: viewport: '#viewport' or { "selector": "#viewport", "padding": 0 }

If a function is given, it is called with the triggering element DOM node as its only argument. The this context is set to the popover instance.

Data attributes for individual popovers

Options for individual popovers can alternatively be specified through the use of data attributes, as explained above.

Methods

$().popover(options)

Initializes popovers for an element collection.

.popover('show')

Reveals an element's popover. Returns to the caller before the popover has actually been shown (i.e. before the shown.bs.popover event occurs). This is considered a "manual" triggering of the popover. Popovers whose both title and content are zero-length are never displayed.

$('#element').popover('show')

.popover('hide')

Hides an element's popover. Returns to the caller before the popover has actually been hidden (i.e. before the hidden.bs.popover event occurs). This is considered a "manual" triggering of the popover.

$('#element').popover('hide')

.popover('toggle')

Toggles an element's popover. Returns to the caller before the popover has actually been shown or hidden (i.e. before the shown.bs.popover or hidden.bs.popover event occurs). This is considered a "manual" triggering of the popover.

$('#element').popover('toggle')

.popover('destroy')

Hides and destroys an element's popover. Popovers that use delegation (which are created using the selector option) cannot be individually destroyed on descendant trigger elements.

$('#element').popover('destroy')

Events

Event Type Description
show.bs.popover This event fires immediately when the show instance method is called.
shown.bs.popover This event is fired when the popover has been made visible to the user (will wait for CSS transitions to complete).
hide.bs.popover This event is fired immediately when the hide instance method has been called.
hidden.bs.popover This event is fired when the popover has finished being hidden from the user (will wait for CSS transitions to complete).
inserted.bs.popover This event is fired after the show.bs.popover event when the popover template has been added to the DOM.
$('#myPopover').on('hidden.bs.popover', function () {
  // do something…
})

警告信息 alert.js

實例

通過此插件可以為警告信息添加點擊并消失的功能。

當使用 .close 按鈕時,它必須是 .alert-dismissible 的第一個子元素,并且在它之前不能有任何文本內容。

用法

為關閉按鈕添加 data-dismiss="alert" 屬性就可以使其自動為警告框賦予關閉功能。關閉警告框也就是將其從 DOM 中刪除。

<button type="button" class="close" data-dismiss="alert" aria-label="Close">
  <span aria-hidden="true">&times;</span>
</button>

為了讓警告框在關閉時表現出動畫效果,請確保為其添加了 .fade.in 類。

方法

$().alert()

讓警告框監聽具有 data-dismiss="alert" 屬性的后裔元素的點擊(click)事件。(如果是通過 data 屬性進行的初始化則無需使用)

$().alert('close')

關閉警告框并從 DOM 中將其刪除。如果警告框被賦予了 .fade.in 類,那么,警告框在淡出之后才會被刪除。

事件

Bootstrap 的警告框插件對外暴露了一些可以被監聽的事件。

事件類型 描述
close.bs.alert close 方法被調用后立即觸發此事件。
closed.bs.alert 當警告框被關閉后(也即 CSS 過渡效果完畢之后)立即觸發此事件。
$('#myAlert').on('closed.bs.alert', function () {
  // do something…
})

按鈕 button.js

按鈕的功能很豐富。通過控制按鈕的狀態或創建一組按鈕并形成一些新的組件,例如工具條。

跨瀏覽器兼容性

在頁面多次加載之間,Firefox 仍然保持表單控件的狀態(禁用狀態和選擇狀態)。一個解決辦法是設置 autocomplete="off"。參見 Mozilla bug #654072

狀態

通過添加 data-loading-text="Loading..." 可以為按鈕設置正在加載的狀態。

從 v3.3.5 版本開始,此特性不再建議使用,并且已經在 v4 版本中刪除了。

Use whichever state you like!

For the sake of this demonstration, we are using data-loading-text and $().button('loading'), but that's not the only state you can use. See more on this below in the $().button(string) documentation.

<button type="button" id="myButton" data-loading-text="Loading..." class="btn btn-primary" autocomplete="off">
  Loading state
</button>

<script>
  $('#myButton').on('click', function () {
    var $btn = $(this).button('loading')
    // business logic...
    $btn.button('reset')
  })
</script>

Single toggle

Add data-toggle="button" to activate toggling on a single button.

Pre-toggled buttons need .active and aria-pressed="true"

For pre-toggled buttons, you must add the .active class and the aria-pressed="true" attribute to the button yourself.

<button type="button" class="btn btn-primary" data-toggle="button" aria-pressed="false" autocomplete="off">
  Single toggle
</button>

Checkbox / Radio

Add data-toggle="buttons" to a .btn-group containing checkbox or radio inputs to enable toggling in their respective styles.

Preselected options need .active

For preselected options, you must add the .active class to the input's label yourself.

Visual checked state only updated on click

If the checked state of a checkbox button is updated without firing a click event on the button (e.g. via <input type="reset"> or via setting the checked property of the input), you will need to toggle the .active class on the input's label yourself.

<div class="btn-group" data-toggle="buttons">
  <label class="btn btn-primary active">
    <input type="checkbox" autocomplete="off" checked> Checkbox 1 (pre-checked)
  </label>
  <label class="btn btn-primary">
    <input type="checkbox" autocomplete="off"> Checkbox 2
  </label>
  <label class="btn btn-primary">
    <input type="checkbox" autocomplete="off"> Checkbox 3
  </label>
</div>
<div class="btn-group" data-toggle="buttons">
  <label class="btn btn-primary active">
    <input type="radio" name="options" id="option1" autocomplete="off" checked> Radio 1 (preselected)
  </label>
  <label class="btn btn-primary">
    <input type="radio" name="options" id="option2" autocomplete="off"> Radio 2
  </label>
  <label class="btn btn-primary">
    <input type="radio" name="options" id="option3" autocomplete="off"> Radio 3
  </label>
</div>

方法

$().button('toggle')

Toggles push state. Gives the button the appearance that it has been activated.

$().button('reset')

重置按鈕狀態 - 將按鈕上的文本還原回原始的內容。此為異步方法,此方法在內容被重置完成之前即返回。

$().button(string)

Swaps text to any data defined text state.

<button type="button" id="myStateButton" data-complete-text="finished!" class="btn btn-primary" autocomplete="off">
  ...
</button>

<script>
  $('#myStateButton').on('click', function () {
    $(this).button('complete') // button text will be "finished!"
  })
</script>

Collapse collapse.js

Flexible plugin that utilizes a handful of classes for easy toggle behavior.

Plugin dependency

Collapse requires the transitions plugin to be included in your version of Bootstrap.

Example

Click the buttons below to show and hide another element via class changes:

  • .collapse hides content
  • .collapsing is applied during transitions
  • .collapse.in shows content

You can use a link with the href attribute, or a button with the data-target attribute. In both cases, the data-toggle="collapse" is required.

Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
<a class="btn btn-primary" role="button" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
  Link with href
</a>
<button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
  Button with data-target
</button>
<div class="collapse" id="collapseExample">
  <div class="well">
    ...
  </div>
</div>

Accordion example

Extend the default collapse behavior to create an accordion with the panel component.

Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
<div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">
  <div class="panel panel-default">
    <div class="panel-heading" role="tab" id="headingOne">
      <h4 class="panel-title">
        <a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
          Collapsible Group Item #1
        </a>
      </h4>
    </div>
    <div id="collapseOne" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingOne">
      <div class="panel-body">
        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
      </div>
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-heading" role="tab" id="headingTwo">
      <h4 class="panel-title">
        <a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
          Collapsible Group Item #2
        </a>
      </h4>
    </div>
    <div id="collapseTwo" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingTwo">
      <div class="panel-body">
        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
      </div>
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-heading" role="tab" id="headingThree">
      <h4 class="panel-title">
        <a class="collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
          Collapsible Group Item #3
        </a>
      </h4>
    </div>
    <div id="collapseThree" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingThree">
      <div class="panel-body">
        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
      </div>
    </div>
  </div>
</div>

It's also possible to swap out .panel-bodys with .list-groups.

  • Bootply
  • One itmus ac facilin
  • Second eros

Make expand/collapse controls accessible

Be sure to add aria-expanded to the control element. This attribute explicitly defines the current state of the collapsible element to screen readers and similar assistive technologies. If the collapsible element is closed by default, it should have a value of aria-expanded="false". If you've set the collapsible element to be open by default using the in class, set aria-expanded="true" on the control instead. The plugin will automatically toggle this attribute based on whether or not the collapsible element has been opened or closed.

Additionally, if your control element is targeting a single collapsible element – i.e. the data-target attribute is pointing to an id selector – you may add an additional aria-controls attribute to the control element, containing the id of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself.

Usage

The collapse plugin utilizes a few classes to handle the heavy lifting:

  • .collapse hides the content
  • .collapse.in shows the content
  • .collapsing is added when the transition starts, and removed when it finishes

These classes can be found in component-animations.less.

Via data attributes

Just add data-toggle="collapse" and a data-target to the element to automatically assign control of a collapsible element. The data-target attribute accepts a CSS selector to apply the collapse to. Be sure to add the class collapse to the collapsible element. If you'd like it to default open, add the additional class in.

To add accordion-like group management to a collapsible control, add the data attribute data-parent="#selector". Refer to the demo to see this in action.

Via JavaScript

Enable manually with:

$('.collapse').collapse()

Options

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-parent="".

Name type default description
parent selector false If a selector is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the panel class)
toggle boolean true Toggles the collapsible element on invocation

Methods

.collapse(options)

Activates your content as a collapsible element. Accepts an optional options object.

$('#myCollapsible').collapse({
  toggle: false
})

.collapse('toggle')

Toggles a collapsible element to shown or hidden. Returns to the caller before the collapsible element has actually been shown or hidden (i.e. before the shown.bs.collapse or hidden.bs.collapse event occurs).

.collapse('show')

Shows a collapsible element. Returns to the caller before the collapsible element has actually been shown (i.e. before the shown.bs.collapse event occurs).

.collapse('hide')

Hides a collapsible element. Returns to the caller before the collapsible element has actually been hidden (i.e. before the hidden.bs.collapse event occurs).

Events

Bootstrap's collapse class exposes a few events for hooking into collapse functionality.

Event Type Description
show.bs.collapse This event fires immediately when the show instance method is called.
shown.bs.collapse This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete).
hide.bs.collapse This event is fired immediately when the hide method has been called.
hidden.bs.collapse This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete).
$('#myCollapsible').on('hidden.bs.collapse', function () {
  // do something…
})

Carousel carousel.js

A slideshow component for cycling through elements, like a carousel. Nested carousels are not supported.

<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
  <ol class="carousel-indicators">
    <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
    <li data-target="#carousel-example-generic" data-slide-to="1"></li>
    <li data-target="#carousel-example-generic" data-slide-to="2"></li>
  </ol>

  <!-- Wrapper for slides -->
  <div class="carousel-inner" role="listbox">
    <div class="item active">
      <img src="..." alt="...">
      <div class="carousel-caption">
        ...
      </div>
    </div>
    <div class="item">
      <img src="..." alt="...">
      <div class="carousel-caption">
        ...
      </div>
    </div>
    ...
  </div>

  <!-- Controls -->
  <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
    <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
    <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>

Optional captions

Add captions to your slides easily with the .carousel-caption element within any .item. Place just about any optional HTML within there and it will be automatically aligned and formatted.

<div class="item">
  <img src="..." alt="...">
  <div class="carousel-caption">
    <h3>...</h3>
    <p>...</p>
  </div>
</div>

Multiple carousels

Carousels require the use of an id on the outermost container (the .carousel) for carousel controls to function properly. When adding multiple carousels, or when changing a carousel's id, be sure to update the relevant controls.

Via data attributes

Use data attributes to easily control the position of the carousel. data-slide accepts the keywords prev or next, which alters the slide position relative to its current position. Alternatively, use data-slide-to to pass a raw slide index to the carousel data-slide-to="2", which shifts the slide position to a particular index beginning with 0.

The data-ride="carousel" attribute is used to mark a carousel as animating starting at page load. It cannot be used in combination with (redundant and unnecessary) explicit JavaScript initialization of the same carousel.

Via JavaScript

Call carousel manually with:

$('.carousel').carousel()

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-interval="".

Name type default description
interval number 5000 The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle.
pause string | null "hover" If set to "hover", pauses the cycling of the carousel on mouseenter and resumes the cycling of the carousel on mouseleave. If set to null, hovering over the carousel won't pause it.
wrap boolean true Whether the carousel should cycle continuously or have hard stops.
keyboard boolean true Whether the carousel should react to keyboard events.

.carousel(options)

Initializes the carousel with an optional options object and starts cycling through items.

$('.carousel').carousel({
  interval: 2000
})

.carousel('cycle')

Cycles through the carousel items from left to right.

.carousel('pause')

Stops the carousel from cycling through items.

.carousel(number)

Cycles the carousel to a particular frame (0 based, similar to an array).

.carousel('prev')

Cycles to the previous item.

.carousel('next')

Cycles to the next item.

Bootstrap's carousel class exposes two events for hooking into carousel functionality.

Both events have the following additional properties:

  • direction: The direction in which the carousel is sliding (either "left" or "right").
  • relatedTarget: The DOM element that is being slid into place as the active item.

All carousel events are fired at the carousel itself (i.e. at the <div class="carousel">).

Event Type Description
slide.bs.carousel This event fires immediately when the slide instance method is invoked.
slid.bs.carousel This event is fired when the carousel has completed its slide transition.
$('#myCarousel').on('slide.bs.carousel', function () {
  // do something…
})

Affix affix.js

Example

The affix plugin toggles position: fixed; on and off, emulating the effect found with position: sticky;. The subnavigation on the right is a live demo of the affix plugin.


Usage

Use the affix plugin via data attributes or manually with your own JavaScript. In both situations, you must provide CSS for the positioning and width of your affixed content.

Note: Do not use the affix plugin on an element contained in a relatively positioned element, such as a pulled or pushed column, due to a Safari rendering bug.

Positioning via CSS

The affix plugin toggles between three classes, each representing a particular state: .affix, .affix-top, and .affix-bottom. You must provide the styles, with the exception of position: fixed; on .affix, for these classes yourself (independent of this plugin) to handle the actual positions.

Here's how the affix plugin works:

  1. To start, the plugin adds .affix-top to indicate the element is in its top-most position. At this point no CSS positioning is required.
  2. Scrolling past the element you want affixed should trigger the actual affixing. This is where .affix replaces .affix-top and sets position: fixed; (provided by Bootstrap's CSS).
  3. If a bottom offset is defined, scrolling past it should replace .affix with .affix-bottom. Since offsets are optional, setting one requires you to set the appropriate CSS. In this case, add position: absolute; when necessary. The plugin uses the data attribute or JavaScript option to determine where to position the element from there.

Follow the above steps to set your CSS for either of the usage options below.

Via data attributes

To easily add affix behavior to any element, just add data-spy="affix" to the element you want to spy on. Use offsets to define when to toggle the pinning of an element.

<div data-spy="affix" data-offset-top="60" data-offset-bottom="200">
  ...
</div>

Via JavaScript

Call the affix plugin via JavaScript:

$('#myAffix').affix({
  offset: {
    top: 100,
    bottom: function () {
      return (this.bottom = $('.footer').outerHeight(true))
    }
  }
})

Options

Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-offset-top="200".

Name type default description
offset number | function | object 10 Pixels to offset from screen when calculating position of scroll. If a single number is provided, the offset will be applied in both top and bottom directions. To provide a unique, bottom and top offset just provide an object offset: { top: 10 } or offset: { top: 10, bottom: 5 }. Use a function when you need to dynamically calculate an offset.
target selector | node | jQuery element the window object Specifies the target element of the affix.

Methods

.affix(options)

Activates your content as affixed content. Accepts an optional options object.

$('#myAffix').affix({
  offset: 15
})

.affix('checkPosition')

Recalculates the state of the affix based on the dimensions, position, and scroll position of the relevant elements. The .affix, .affix-top, and .affix-bottom classes are added to or removed from the affixed content according to the new state. This method needs to be called whenever the dimensions of the affixed content or the target element are changed, to ensure correct positioning of the affixed content.

$('#myAffix').affix('checkPosition')

Events

Bootstrap's affix plugin exposes a few events for hooking into affix functionality.

Event Type Description
affix.bs.affix This event fires immediately before the element has been affixed.
affixed.bs.affix This event is fired after the element has been affixed.
affix-top.bs.affix This event fires immediately before the element has been affixed-top.
affixed-top.bs.affix This event is fired after the element has been affixed-top.
affix-bottom.bs.affix This event fires immediately before the element has been affixed-bottom.
affixed-bottom.bs.affix This event is fired after the element has been affixed-bottom.