可用图标

包含来自Glyphicon Halflings集合的250多个字体格式图标。Glyphicons Halflings通常不是免费的，但它们的创建者已免费提供给Bootstrap使用。作为感谢，我们只要求您在可能的情况下包含一个指向Glyphicons的链接。

glyphicon glyphicon-asterisk
glyphicon glyphicon-plus
glyphicon glyphicon-euro
glyphicon glyphicon-eur
glyphicon glyphicon-minus
glyphicon glyphicon-cloud
glyphicon glyphicon-envelope
glyphicon glyphicon-pencil
glyphicon glyphicon-glass
glyphicon glyphicon-music
glyphicon glyphicon-search
glyphicon glyphicon-heart
glyphicon glyphicon-star
glyphicon glyphicon-star-empty
glyphicon glyphicon-user
glyphicon glyphicon-film
glyphicon glyphicon-th-large
glyphicon glyphicon-th
glyphicon glyphicon-th-list
glyphicon glyphicon-ok
glyphicon glyphicon-remove
glyphicon glyphicon-zoom-in
glyphicon glyphicon-zoom-out
glyphicon glyphicon-off
glyphicon glyphicon-signal
glyphicon glyphicon-cog
glyphicon glyphicon-trash
glyphicon glyphicon-home
glyphicon glyphicon-file
glyphicon glyphicon-time
glyphicon glyphicon-road
glyphicon glyphicon-download-alt
glyphicon glyphicon-download
glyphicon glyphicon-upload
glyphicon glyphicon-inbox
glyphicon glyphicon-play-circle
glyphicon glyphicon-repeat
glyphicon glyphicon-refresh
glyphicon glyphicon-list-alt
glyphicon glyphicon-lock
glyphicon glyphicon-flag
glyphicon glyphicon-headphones
glyphicon glyphicon-volume-off
glyphicon glyphicon-volume-down
glyphicon glyphicon-volume-up
glyphicon glyphicon-qrcode
glyphicon glyphicon-barcode
glyphicon glyphicon-tag
glyphicon glyphicon-tags
glyphicon glyphicon-book
glyphicon glyphicon-bookmark
glyphicon glyphicon-print
glyphicon glyphicon-camera
glyphicon glyphicon-font
glyphicon glyphicon-bold
glyphicon glyphicon-italic
glyphicon glyphicon-text-height
glyphicon glyphicon-text-width
glyphicon glyphicon-align-left
glyphicon glyphicon-align-center
glyphicon glyphicon-align-right
glyphicon glyphicon-align-justify
glyphicon glyphicon-list
glyphicon glyphicon-indent-left
glyphicon glyphicon-indent-right
glyphicon glyphicon-facetime-video
glyphicon glyphicon-picture
glyphicon glyphicon-map-marker
glyphicon glyphicon-adjust
glyphicon glyphicon-tint
glyphicon glyphicon-edit
glyphicon glyphicon-share
glyphicon glyphicon-check
glyphicon glyphicon-move
glyphicon glyphicon-step-backward
glyphicon glyphicon-fast-backward
glyphicon glyphicon-backward
glyphicon glyphicon-play
glyphicon glyphicon-pause
glyphicon glyphicon-stop
glyphicon glyphicon-forward
glyphicon glyphicon-fast-forward
glyphicon glyphicon-step-forward
glyphicon glyphicon-eject
glyphicon glyphicon-chevron-left
glyphicon glyphicon-chevron-right
glyphicon glyphicon-plus-sign
glyphicon glyphicon-minus-sign
glyphicon glyphicon-remove-sign
glyphicon glyphicon-ok-sign
glyphicon glyphicon-question-sign
glyphicon glyphicon-info-sign
glyphicon glyphicon-screenshot
glyphicon glyphicon-remove-circle
glyphicon glyphicon-ok-circle
glyphicon glyphicon-ban-circle
glyphicon glyphicon-arrow-left
glyphicon glyphicon-arrow-right
glyphicon glyphicon-arrow-up
glyphicon glyphicon-arrow-down
glyphicon glyphicon-share-alt
glyphicon glyphicon-resize-full
glyphicon glyphicon-resize-small
glyphicon glyphicon-exclamation-sign
glyphicon glyphicon-gift
glyphicon glyphicon-leaf
glyphicon glyphicon-fire
glyphicon glyphicon-eye-open
glyphicon glyphicon-eye-close
glyphicon glyphicon-warning-sign
glyphicon glyphicon-plane
glyphicon glyphicon-calendar
glyphicon glyphicon-random
glyphicon glyphicon-comment
glyphicon glyphicon-magnet
glyphicon glyphicon-chevron-up
glyphicon glyphicon-chevron-down
glyphicon glyphicon-retweet
glyphicon glyphicon-shopping-cart
glyphicon glyphicon-folder-close
glyphicon glyphicon-folder-open
glyphicon glyphicon-resize-vertical
glyphicon glyphicon-resize-horizontal
glyphicon glyphicon-hdd
glyphicon glyphicon-bullhorn
glyphicon glyphicon-bell
glyphicon glyphicon-certificate
glyphicon glyphicon-thumbs-up
glyphicon glyphicon-thumbs-down
glyphicon glyphicon-hand-right
glyphicon glyphicon-hand-left
glyphicon glyphicon-hand-up
glyphicon glyphicon-hand-down
glyphicon glyphicon-circle-arrow-right
glyphicon glyphicon-circle-arrow-left
glyphicon glyphicon-circle-arrow-up
glyphicon glyphicon-circle-arrow-down
glyphicon glyphicon-globe
glyphicon glyphicon-wrench
glyphicon glyphicon-tasks
glyphicon glyphicon-filter
glyphicon glyphicon-briefcase
glyphicon glyphicon-fullscreen
glyphicon glyphicon-dashboard
glyphicon glyphicon-paperclip
glyphicon glyphicon-heart-empty
glyphicon glyphicon-link
glyphicon glyphicon-phone
glyphicon glyphicon-pushpin
glyphicon glyphicon-usd
glyphicon glyphicon-gbp
glyphicon glyphicon-sort
glyphicon glyphicon-sort-by-alphabet
glyphicon glyphicon-sort-by-alphabet-alt
glyphicon glyphicon-sort-by-order
glyphicon glyphicon-sort-by-order-alt
glyphicon glyphicon-sort-by-attributes
glyphicon glyphicon-sort-by-attributes-alt
glyphicon glyphicon-unchecked
glyphicon glyphicon-expand
glyphicon glyphicon-collapse-down
glyphicon glyphicon-collapse-up
glyphicon glyphicon-log-in
glyphicon glyphicon-flash
glyphicon glyphicon-log-out
glyphicon glyphicon-new-window
glyphicon glyphicon-record
glyphicon glyphicon-save
glyphicon glyphicon-open
glyphicon glyphicon-saved
glyphicon glyphicon-import
glyphicon glyphicon-export
glyphicon glyphicon-send
glyphicon glyphicon-floppy-disk
glyphicon glyphicon-floppy-saved
glyphicon glyphicon-floppy-remove
glyphicon glyphicon-floppy-save
glyphicon glyphicon-floppy-open
glyphicon glyphicon-credit-card
glyphicon glyphicon-transfer
glyphicon glyphicon-cutlery
glyphicon glyphicon-header
glyphicon glyphicon-compressed
glyphicon glyphicon-earphone
glyphicon glyphicon-phone-alt
glyphicon glyphicon-tower
glyphicon glyphicon-stats
glyphicon glyphicon-sd-video
glyphicon glyphicon-hd-video
glyphicon glyphicon-subtitles
glyphicon glyphicon-sound-stereo
glyphicon glyphicon-sound-dolby
glyphicon glyphicon-sound-5-1
glyphicon glyphicon-sound-6-1
glyphicon glyphicon-sound-7-1
glyphicon glyphicon-copyright-mark
glyphicon glyphicon-registration-mark
glyphicon glyphicon-cloud-download
glyphicon glyphicon-cloud-upload
glyphicon glyphicon-tree-conifer
glyphicon glyphicon-tree-deciduous
glyphicon glyphicon-cd
glyphicon glyphicon-save-file
glyphicon glyphicon-open-file
glyphicon glyphicon-level-up
glyphicon glyphicon-copy
glyphicon glyphicon-paste
glyphicon glyphicon-alert
glyphicon glyphicon-equalizer
glyphicon glyphicon-king
glyphicon glyphicon-queen
glyphicon glyphicon-pawn
glyphicon glyphicon-bishop
glyphicon glyphicon-knight
glyphicon glyphicon-baby-formula
glyphicon glyphicon-tent
glyphicon glyphicon-blackboard
glyphicon glyphicon-bed
glyphicon glyphicon-apple
glyphicon glyphicon-erase
glyphicon glyphicon-hourglass
glyphicon glyphicon-lamp
glyphicon glyphicon-duplicate
glyphicon glyphicon-piggy-bank
glyphicon glyphicon-scissors
glyphicon glyphicon-bitcoin
glyphicon glyphicon-btc
glyphicon glyphicon-xbt
glyphicon glyphicon-yen
glyphicon glyphicon-jpy
glyphicon glyphicon-ruble
glyphicon glyphicon-rub
glyphicon glyphicon-scale
glyphicon glyphicon-ice-lolly
glyphicon glyphicon-ice-lolly-tasted
glyphicon glyphicon-education
glyphicon glyphicon-option-horizontal
glyphicon glyphicon-option-vertical
glyphicon glyphicon-menu-hamburger
glyphicon glyphicon-modal-window
glyphicon glyphicon-oil
glyphicon glyphicon-grain
glyphicon glyphicon-sunglasses
glyphicon glyphicon-text-size
glyphicon glyphicon-text-color
glyphicon glyphicon-text-background
glyphicon glyphicon-object-align-top
glyphicon glyphicon-object-align-bottom
glyphicon glyphicon-object-align-horizontal
glyphicon glyphicon-object-align-left
glyphicon glyphicon-object-align-vertical
glyphicon glyphicon-object-align-right
glyphicon glyphicon-triangle-right
glyphicon glyphicon-triangle-left
glyphicon glyphicon-triangle-bottom
glyphicon glyphicon-triangle-top
glyphicon glyphicon-console
glyphicon glyphicon-superscript
glyphicon glyphicon-subscript
glyphicon glyphicon-menu-left
glyphicon glyphicon-menu-right
glyphicon glyphicon-menu-down
glyphicon glyphicon-menu-up

如何使用

出于性能原因，所有图标都需要一个基础类和单独的图标类。要使用，请将以下代码放在任何地方。确保在图标和文本之间留出空间以获得适当的填充。

不要与其他组件混合使用

图标类不能直接与其他组件组合。它们不应该在同一元素上与其他类一起使用。相反，添加一个嵌套的<span>并将图标类应用到<span>上。

仅用于空元素

图标类应该只用于不包含文本内容且没有子元素的元素。

更改图标字体位置

Bootstrap假设图标字体文件将位于../fonts/目录中，相对于编译的CSS文件。移动或重命名这些字体文件意味着通过以下三种方式之一更新CSS：

更改源Less文件中的@icon-font-path和/或@icon-font-name变量。
利用Less编译器提供的相对URL选项。
更改编译CSS中的url()路径。

使用最适合您特定开发设置的任何选项。

无障碍图标

现代版本的辅助技术将宣布CSS生成的内容以及特定的Unicode字符。为了避免屏幕阅读器中出现意外和混乱的输出（特别是当图标纯粹用于装饰时），我们使用aria-hidden="true"属性隐藏它们。

如果您使用图标来传达含义（而不是仅作为装饰元素），请确保这种含义也传达给辅助技术——例如，包含使用.sr-only类视觉隐藏的额外内容。

如果您创建没有其他文本的控件（例如只包含图标的<button>），您应该始终提供替代内容来识别控件的用途，以便它对辅助技术用户有意义。在这种情况下，您可以在控件本身添加aria-label属性。

<span class="glyphicon glyphicon-search" aria-hidden="true"></span>

示例

在按钮、工具栏的按钮组、导航或前置表单输入中使用它们。

<button type="button" class="btn btn-default" aria-label="Left Align">
  <span class="glyphicon glyphicon-align-left" aria-hidden="true"></span>
</button>

<button type="button" class="btn btn-default btn-lg">
  <span class="glyphicon glyphicon-star" aria-hidden="true"></span> Star
</button>

在警告框中使用的图标，用于传达这是一个错误消息，带有额外的.sr-only文本来向辅助技术用户传达此提示。

Enter a valid email address

<div class="alert alert-danger" role="alert">
  <span class="glyphicon glyphicon-exclamation-sign" aria-hidden="true"></span>
  <span class="sr-only">Error:</span>
  Enter a valid email address
</div>

Toggleable, contextual menu for displaying lists of links. Made interactive with the dropdown JavaScript plugin.

Example

Wrap the dropdown's trigger and the dropdown menu within .dropdown, or another element that declares position: relative;. Then add the menu's HTML.

<div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
    Dropdown
    <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>

Dropdown menus can be changed to expand upwards (instead of downwards) by adding .dropup to the parent.

<div class="dropup">
  <button class="btn btn-default dropdown-toggle" type="button" id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Dropup
    <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" aria-labelledby="dropdownMenu2">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>

Alignment

By default, a dropdown menu is automatically positioned 100% from the top and along the left side of its parent. Add .dropdown-menu-right to a .dropdown-menu to right align the dropdown menu.

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

Headers

Add a header to label sections of actions in any dropdown menu.

<ul class="dropdown-menu" aria-labelledby="dropdownMenu3">
  ...
  <li class="dropdown-header">Dropdown header</li>
  ...
</ul>

分隔符

在下拉菜单中添加分隔符来分隔链接系列。

<ul class="dropdown-menu" aria-labelledby="dropdownMenuDivider">
  ...
  <li role="separator" class="divider"></li>
  ...
</ul>

禁用的菜单项

在下拉菜单中的<li>上添加.disabled来禁用链接。

<ul class="dropdown-menu" aria-labelledby="dropdownMenu4">
  <li><a href="#">Regular link</a></li>
  <li class="disabled"><a href="#">Disabled link</a></li>
  <li><a href="#">Another link</a></li>
</ul>

使用按钮组将一系列按钮组合在一行中。使用我们的按钮插件添加可选的JavaScript单选和复选框样式行为。

按钮组中的工具提示和弹出框需要特殊设置

在.btn-group内的元素上使用工具提示或弹出框时，您必须指定选项container: 'body'以避免不想要的副作用（例如当工具提示或弹出框被触发时元素变宽和/或失去圆角）。

确保正确的`role`并提供标签

为了让辅助技术（如屏幕阅读器）传达一系列按钮是分组的，需要提供适当的role属性。对于按钮组，这应该是role="group"，而工具栏应该有role="toolbar"。

一个例外是只包含单个控件的组（例如带有<button>元素的两端对齐按钮组）或下拉菜单。

此外，应该给组和工具栏一个明确的标签，因为大多数辅助技术否则不会宣布它们，尽管存在正确的role属性。在本文档提供的示例中，我们使用aria-label，但也可以使用替代方案，如aria-labelledby。

基本示例

在.btn-group中包装一系列带有.btn的按钮。

<div class="btn-group" role="group" aria-label="...">
  <button type="button" class="btn btn-default">Left</button>
  <button type="button" class="btn btn-default">Middle</button>
  <button type="button" class="btn btn-default">Right</button>
</div>

将<div class="btn-group">集合组合到<div class="btn-toolbar">中以创建更复杂的组件。

<div class="btn-toolbar" role="toolbar" aria-label="...">
  <div class="btn-group" role="group" aria-label="...">...</div>
  <div class="btn-group" role="group" aria-label="...">...</div>
  <div class="btn-group" role="group" aria-label="...">...</div>
</div>

尺寸

不要将按钮尺寸类应用到组中的每个按钮，只需将.btn-group-*添加到每个.btn-group，包括嵌套多个组时。

<div class="btn-group btn-group-lg" role="group" aria-label="...">...</div>
<div class="btn-group" role="group" aria-label="...">...</div>
<div class="btn-group btn-group-sm" role="group" aria-label="...">...</div>
<div class="btn-group btn-group-xs" role="group" aria-label="...">...</div>

嵌套

当您想要下拉菜单与一系列按钮混合时，请将一个.btn-group放在另一个.btn-group内。

<div class="btn-group" role="group" aria-label="...">
  <button type="button" class="btn btn-default">1</button>
  <button type="button" class="btn btn-default">2</button>

  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
      Dropdown
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      <li><a href="#">Dropdown link</a></li>
      <li><a href="#">Dropdown link</a></li>
    </ul>
  </div>
</div>

垂直变化

使一组按钮垂直堆叠而不是水平排列。这里不支持分割按钮下拉菜单。

<div class="btn-group-vertical" role="group" aria-label="...">
  ...
</div>

Justified button groups

Make a group of buttons stretch at equal sizes to span the entire width of its parent. Also works with button dropdowns within the button group.

Handling borders

Due to the specific HTML and CSS used to justify buttons (namely display: table-cell), the borders between them are doubled. In regular button groups, margin-left: -1px is used to stack the borders instead of removing them. However, margin doesn't work with display: table-cell. As a result, depending on your customizations to Bootstrap, you may wish to remove or re-color the borders.

IE8 and borders

Internet Explorer 8 doesn't render borders on buttons in a justified button group, whether it's on <a> or <button> elements. To get around that, wrap each button in another .btn-group.

See #12476 for more information.

With `<a>` elements

Just wrap a series of .btns in .btn-group.btn-group-justified.

Left Middle Right

Left Middle

<div class="btn-group btn-group-justified" role="group" aria-label="...">
  ...
</div>

Links acting as buttons

If the <a> elements are used to act as buttons – triggering in-page functionality, rather than navigating to another document or section within the current page – they should also be given an appropriate role="button".

With `<button>` elements

To use justified button groups with <button> elements, you must wrap each button in a button group. Most browsers don't properly apply our CSS for justification to <button> elements, but since we support button dropdowns, we can work around that.

<div class="btn-group btn-group-justified" role="group" aria-label="...">
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Left</button>
  </div>
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Middle</button>
  </div>
  <div class="btn-group" role="group">
    <button type="button" class="btn btn-default">Right</button>
  </div>
</div>

通过将任何按钮放在.btn-group内并提供适当的菜单标记来使用它触发下拉菜单。

插件依赖

按钮下拉菜单需要下拉菜单插件包含在您的Bootstrap版本中。

单个按钮下拉菜单

通过一些基本的标记更改将按钮转换为下拉菜单切换器。

<!-- Single button -->
<div class="btn-group">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Action <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li role="separator" class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>

分割按钮下拉菜单

类似地，使用相同的标记更改创建分割按钮下拉菜单，只是使用单独的按钮。

<!-- Split button -->
<div class="btn-group">
  <button type="button" class="btn btn-danger">Action</button>
  <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    <span class="caret"></span>
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <ul class="dropdown-menu">
    <li><a href="#">Action</a></li>
    <li><a href="#">Another action</a></li>
    <li><a href="#">Something else here</a></li>
    <li role="separator" class="divider"></li>
    <li><a href="#">Separated link</a></li>
  </ul>
</div>

Sizing

Button dropdowns work with buttons of all sizes.

<!-- Large button group -->
<div class="btn-group">
  <button class="btn btn-default btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Large button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">
    ...
  </ul>
</div>

<!-- Small button group -->
<div class="btn-group">
  <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Small button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">
    ...
  </ul>
</div>

<!-- Extra small button group -->
<div class="btn-group">
  <button class="btn btn-default btn-xs dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Extra small button <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">
    ...
  </ul>
</div>

向上弹出变化

通过向父元素添加.dropup来在元素上方触发下拉菜单。

<div class="btn-group dropup">
  <button type="button" class="btn btn-default">Dropup</button>
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    <span class="caret"></span>
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <ul class="dropdown-menu">
    <!-- Dropdown menu links -->
  </ul>
</div>

Extend form controls by adding text or buttons before, after, or on both sides of any text-based <input>. Use .input-group with an .input-group-addon to prepend or append elements to a single .form-control.

Textual `<input>`s only

Avoid using <select> elements here as they cannot be fully styled in WebKit browsers.

Avoid using <textarea> elements here as their rows attribute will not be respected in some cases.

Tooltips & popovers in input groups require special setting

When using tooltips or popovers on elements within an .input-group, you'll have to specify the option container: 'body' to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip or popover is triggered).

Don't mix with other components

Do not mix form groups or grid column classes directly with input groups. Instead, nest the input group inside of the form group or grid-related element.

Always add labels

Screen readers will have trouble with your forms if you don't include a label for every input. For these input groups, ensure that any additional label or functionality is conveyed to assistive technologies.

The exact technique to be used (<label> elements hidden using the .sr-only class, or use of the aria-label, aria-labelledby, aria-describedby, title or placeholder attribute) and what additional information will need to be conveyed will vary depending on the exact type of interface widget you're implementing. The examples in this section provide a few suggested, case-specific approaches.

Basic example

Place one add-on or button on either side of an input. You may also place one on both sides of an input.

We do not support multiple add-ons on a single side.

We do not support multiple form-controls in a single input group.

<div class="input-group">
  <span class="input-group-addon" id="basic-addon1">@</span>
  <input type="text" class="form-control" placeholder="Username" aria-describedby="basic-addon1">
</div>

<div class="input-group">
  <input type="text" class="form-control" placeholder="Recipient's username" aria-describedby="basic-addon2">
  <span class="input-group-addon" id="basic-addon2">@example.com</span>
</div>

<div class="input-group">
  <span class="input-group-addon">$</span>
  <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
  <span class="input-group-addon">.00</span>
</div>

Sizing

Add the relative form sizing classes to the .input-group itself and contents within will automatically resize—no need for repeating the form control size classes on each element.

<div class="input-group input-group-lg">
  <span class="input-group-addon" id="sizing-addon1">@</span>
  <input type="text" class="form-control" placeholder="Username" aria-describedby="sizing-addon1">
</div>

<div class="input-group">
  <span class="input-group-addon" id="sizing-addon2">@</span>
  <input type="text" class="form-control" placeholder="Username" aria-describedby="sizing-addon2">
</div>

<div class="input-group input-group-sm">
  <span class="input-group-addon" id="sizing-addon3">@</span>
  <input type="text" class="form-control" placeholder="Username" aria-describedby="sizing-addon3">
</div>

复选框和单选按钮附加组件

在输入组的附加组件中放置任何复选框或单选按钮选项，而不是文本。

<div class="row">
  <div class="col-lg-6">
    <div class="input-group">
      <span class="input-group-addon">
        <input type="checkbox" aria-label="...">
      </span>
      <input type="text" class="form-control" aria-label="...">
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
  <div class="col-lg-6">
    <div class="input-group">
      <span class="input-group-addon">
        <input type="radio" aria-label="...">
      </span>
      <input type="text" class="form-control" aria-label="...">
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
</div><!-- /.row -->

按钮附加组件

输入组中的按钮略有不同，需要额外的一层嵌套。不要使用.input-group-addon，您需要使用.input-group-btn来包装按钮。这是必需的，因为默认的浏览器样式无法被覆盖。

<div class="row">
  <div class="col-lg-6">
    <div class="input-group">
      <span class="input-group-btn">
        <button class="btn btn-default" type="button">Go!</button>
      </span>
      <input type="text" class="form-control" placeholder="Search for...">
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
  <div class="col-lg-6">
    <div class="input-group">
      <input type="text" class="form-control" placeholder="Search for...">
      <span class="input-group-btn">
        <button class="btn btn-default" type="button">Go!</button>
      </span>
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
</div><!-- /.row -->

带下拉菜单的按钮

<div class="row">
  <div class="col-lg-6">
    <div class="input-group">
      <div class="input-group-btn">
        <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Action <span class="caret"></span></button>
        <ul class="dropdown-menu">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
      <input type="text" class="form-control" aria-label="...">
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
  <div class="col-lg-6">
    <div class="input-group">
      <input type="text" class="form-control" aria-label="...">
      <div class="input-group-btn">
        <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Action <span class="caret"></span></button>
        <ul class="dropdown-menu dropdown-menu-right">
          <li><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div><!-- /btn-group -->
    </div><!-- /input-group -->
  </div><!-- /.col-lg-6 -->
</div><!-- /.row -->

Segmented buttons

<div class="input-group">
  <div class="input-group-btn">
    <!-- Button and dropdown menu -->
  </div>
  <input type="text" class="form-control" aria-label="...">
</div>

<div class="input-group">
  <input type="text" class="form-control" aria-label="...">
  <div class="input-group-btn">
    <!-- Button and dropdown menu -->
  </div>
</div>

Bootstrap中可用的导航具有共享标记，从基础.nav类开始，以及共享状态。交换修饰符类以在每种样式之间切换。

将导航用于标签面板需要JavaScript标签插件

对于具有可标签区域的标签，您必须使用标签JavaScript插件。标记还需要额外的role和ARIA属性——有关详细信息，请参阅插件的示例标记。

使用作导航的导航具有无障碍性

如果您使用导航来提供导航栏，请确保在<ul>的最逻辑父容器中添加role="navigation"，或者在整个导航周围包装<nav>元素。不要将角色添加到<ul>本身，因为这会阻止辅助技术将其宣布为实际列表。

标签页

注意.nav-tabs类需要.nav基础类。

<ul class="nav nav-tabs">
  <li role="presentation" class="active"><a href="#">Home</a></li>
  <li role="presentation"><a href="#">Profile</a></li>
  <li role="presentation"><a href="#">Messages</a></li>
</ul>

胶囊导航

使用相同的HTML，但使用.nav-pills代替：

<ul class="nav nav-pills">
  <li role="presentation" class="active"><a href="#">Home</a></li>
  <li role="presentation"><a href="#">Profile</a></li>
  <li role="presentation"><a href="#">Messages</a></li>
</ul>

胶囊导航也可以垂直堆叠。只需添加.nav-stacked。

<ul class="nav nav-pills nav-stacked">
  ...
</ul>

两端对齐

使用.nav-justified轻松使标签页或胶囊导航在宽度超过768px的屏幕上与其父级等宽。在较小的屏幕上，导航链接会堆叠。

目前不支持两端对齐的导航栏导航链接。

Safari和响应式两端对齐导航

从v8.0开始，Safari出现了一个错误，水平调整浏览器大小会导致两端对齐导航中的渲染错误，这些错误在刷新时会被清除。这个错误也在两端对齐导航示例中显示。

<ul class="nav nav-tabs nav-justified">
  ...
</ul>
<ul class="nav nav-pills nav-justified">
  ...
</ul>

Disabled links

For any nav component (tabs or pills), add .disabled for gray links and no hover effects.

Link functionality not impacted

This class will only change the <a>'s appearance, not its functionality. Use custom JavaScript to disable links here.

<ul class="nav nav-pills">
  ...
  <li role="presentation" class="disabled"><a href="#">Disabled link</a></li>
  ...
</ul>

Using dropdowns

Add dropdown menus with a little extra HTML and the dropdowns JavaScript plugin.

Tabs with dropdowns

<ul class="nav nav-tabs">
  ...
  <li role="presentation" class="dropdown">
    <a class="dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">
      Dropdown <span class="caret"></span>
    </a>
    <ul class="dropdown-menu">
      ...
    </ul>
  </li>
  ...
</ul>

Pills with dropdowns

<ul class="nav nav-pills">
  ...
  <li role="presentation" class="dropdown">
    <a class="dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">
      Dropdown <span class="caret"></span>
    </a>
    <ul class="dropdown-menu">
      ...
    </ul>
  </li>
  ...
</ul>

Navbars are responsive meta components that serve as navigation headers for your application or site. They begin collapsed (and are toggleable) in mobile views and become horizontal as the available viewport width increases.

Justified navbar nav links are currently not supported.

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">One more separated link</a></li>
          </ul>
        </li>
      </ul>
      <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">Submit</button>
      </form>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">Link</a></li>
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

Replace the navbar brand with your own image by swapping the text for an <img>. Since the .navbar-brand has its own padding and height, you may need to override some CSS depending on your image.

<nav class="navbar navbar-default">
  <div class="container-fluid">
    <div class="navbar-header">
      <a class="navbar-brand" href="#">
        <img alt="Brand" src="...">
      </a>
    </div>
  </div>
</nav>

Place form content within .navbar-form for proper vertical alignment and collapsed behavior in narrow viewports. Use the alignment options to decide where it resides within the navbar content.

As a heads up, .navbar-form shares much of its code with .form-inline via mixin. Some form controls, like input groups, may require fixed widths to be show up properly within a navbar.

<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">Submit</button>
</form>

Always add labels

Screen readers will have trouble with your forms if you don't include a label for every input. For these inline forms, you can hide the labels using the .sr-only class. There are further alternative methods of providing a label for assistive technologies, such as the aria-label, aria-labelledby or title attribute. If none of these is present, screen readers may resort to using the placeholder attribute, if present, but note that use of placeholder as a replacement for other labelling methods is not advised.

Add the .navbar-btn class to <button> elements not residing in a <form> to vertically center them in the navbar.

<button type="button" class="btn btn-default navbar-btn">Sign in</button>

Wrap strings of text in an element with .navbar-text, usually on a <p> tag for proper leading and color.

<p class="navbar-text">Signed in as Mark Otto</p>

For folks using standard links that are not within the regular navbar navigation component, use the .navbar-link class to add the proper colors for the default and inverse navbar options.

<p class="navbar-text navbar-right">Signed in as <a href="#" class="navbar-link">Mark Otto</a></p>

Align nav links, forms, buttons, or text, using the .navbar-left or .navbar-right utility classes. Both classes will add a CSS float in the specified direction. For example, to align nav links, put them in a separate <ul> with the respective utility class applied.

These classes are mixin-ed versions of .pull-left and .pull-right, but they're scoped to media queries for easier handling of navbar components across device sizes.

Add .navbar-fixed-top and include a .container or .container-fluid to center and pad navbar content.

<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container">
    ...
  </div>
</nav>

需要body填充

固定导航栏将覆盖您的其他内容，除非您向<body>的顶部添加padding。尝试您自己的值或使用下面的代码片段。提示：默认情况下，导航栏高度为50px。

body { padding-top: 70px; }

确保在核心Bootstrap CSS之后包含此内容。

添加.navbar-fixed-bottom并包含.container或.container-fluid以居中并填充导航栏内容。

<nav class="navbar navbar-default navbar-fixed-bottom">
  <div class="container">
    ...
  </div>
</nav>

需要body填充

固定导航栏将覆盖您的其他内容，除非您向<body>的底部添加padding。尝试您自己的值或使用下面的代码片段。提示：默认情况下，导航栏高度为50px。

body { padding-bottom: 70px; }

确保在核心Bootstrap CSS之后包含此内容。

通过添加.navbar-static-top创建一个随页面滚动的全宽导航栏，并包含.container或.container-fluid以居中并填充导航栏内容。

与.navbar-fixed-*类不同，您不需要更改body上的任何填充。

<nav class="navbar navbar-default navbar-static-top">
  <div class="container">
    ...
  </div>
</nav>

Modify the look of the navbar by adding .navbar-inverse.

<nav class="navbar navbar-inverse">
  ...
</nav>

Breadcrumbs

Indicate the current page's location within a navigational hierarchy.

Separators are automatically added in CSS through :before and content.

<ol class="breadcrumb">
  <li><a href="#">Home</a></li>
  <li><a href="#">Library</a></li>
  <li class="active">Data</li>
</ol>

Pagination

Provide pagination links for your site or app with the multi-page pagination component, or the simpler pager alternative.

Default pagination

Simple pagination inspired by Rdio, great for apps and search results. The large block is hard to miss, easily scalable, and provides large click areas.

<nav>
  <ul class="pagination">
    <li>
      <a href="#" aria-label="Previous">
        <span aria-hidden="true">&laquo;</span>
      </a>
    </li>
    <li><a href="#">1</a></li>
    <li><a href="#">2</a></li>
    <li><a href="#">3</a></li>
    <li><a href="#">4</a></li>
    <li><a href="#">5</a></li>
    <li>
      <a href="#" aria-label="Next">
        <span aria-hidden="true">&raquo;</span>
      </a>
    </li>
  </ul>
</nav>

禁用和激活状态

链接可以根据不同情况进行自定义。使用.disabled表示不可点击的链接，使用.active表示当前页面。

<nav>
  <ul class="pagination">
    <li class="disabled"><a href="#" aria-label="Previous"><span aria-hidden="true">&laquo;</span></a></li>
    <li class="active"><a href="#">1 <span class="sr-only">(current)</span></a></li>
    ...
  </ul>
</nav>

您可以选择性地将激活或禁用的锚点替换为<span>，或者在前进/后退箭头的情况下省略锚点，以移除点击功能同时保留预期样式。

<nav>
  <ul class="pagination">
    <li class="disabled">
      <span>
        <span aria-hidden="true">&laquo;</span>
      </span>
    </li>
    <li class="active">
      <span>1 <span class="sr-only">(current)</span></span>
    </li>
    ...
  </ul>
</nav>

尺寸

想要更大或更小的分页？添加.pagination-lg或.pagination-sm以获得额外的尺寸。

<nav><ul class="pagination pagination-lg">...</ul></nav>
<nav><ul class="pagination">...</ul></nav>
<nav><ul class="pagination pagination-sm">...</ul></nav>

分页器

用于简单分页实现的快速前进和后退链接，具有轻量级标记和样式。对于博客或杂志等简单网站非常有用。

默认示例

默认情况下，分页器居中链接。

<nav>
  <ul class="pager">
    <li><a href="#">Previous</a></li>
    <li><a href="#">Next</a></li>
  </ul>
</nav>

Aligned links

Alternatively, you can align each link to the sides:

<nav>
  <ul class="pager">
    <li class="previous"><a href="#"><span aria-hidden="true">&larr;</span> Older</a></li>
    <li class="next"><a href="#">Newer <span aria-hidden="true">&rarr;</span></a></li>
  </ul>
</nav>

Optional disabled state

Pager links also use the general .disabled utility class from the pagination.

<nav>
  <ul class="pager">
    <li class="previous disabled"><a href="#"><span aria-hidden="true">&larr;</span> Older</a></li>
    <li class="next"><a href="#">Newer <span aria-hidden="true">&rarr;</span></a></li>
  </ul>
</nav>

Example

Example heading New

<h3>Example heading <span class="label label-default">New</span></h3>

Available variations

Add any of the below mentioned modifier classes to change the appearance of a label.

Default Primary Success Info Warning Danger

<span class="label label-default">Default</span>
<span class="label label-primary">Primary</span>
<span class="label label-success">Success</span>
<span class="label label-info">Info</span>
<span class="label label-warning">Warning</span>
<span class="label label-danger">Danger</span>

Have tons of labels?

Rendering problems can arise when you have dozens of inline labels within a narrow container, each containing its own inline-block element (like an icon). The way around this is setting display: inline-block;. For context and an example, see #13219.

Easily highlight new or unread items by adding a <span class="badge"> to links, Bootstrap navs, and more.

Inbox 42

<a href="#">Inbox <span class="badge">42</span></a>

<button class="btn btn-primary" type="button">
  Messages <span class="badge">4</span>
</button>

Self collapsing

When there are no new or unread items, badges will simply collapse (via CSS's :empty selector) provided no content exists within.

跨浏览器兼容性

徽章在Internet Explorer 8中不会自动折叠，因为它不支持:empty选择器。

适应激活导航状态

包含内置样式，用于在胶囊导航的激活状态中放置徽章。

<ul class="nav nav-pills" role="tablist">
  <li role="presentation" class="active"><a href="#">Home <span class="badge">42</span></a></li>
  <li role="presentation"><a href="#">Profile</a></li>
  <li role="presentation"><a href="#">Messages <span class="badge">3</span></a></li>
</ul>

一个轻量级、灵活的组件，可以选择性地扩展整个视口以展示您网站上的关键内容。

Hello, world!

This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.

Learn more

<div class="jumbotron">
  <h1>Hello, world!</h1>
  <p>...</p>
  <p><a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a></p>
</div>

要使巨幕全宽且没有圆角，请将其放在所有.container之外，并在其中添加.container。

<div class="jumbotron">
  <div class="container">
    ...
  </div>
</div>

为h1提供一个简单的外壳，以适当地分隔和分段页面上的内容部分。它可以利用h1的默认small元素，以及大多数其他组件（具有额外样式）。

<div class="page-header">
  <h1>Example page header <small>Subtext for header</small></h1>
</div>

使用缩略图组件扩展Bootstrap的网格系统，以轻松显示图像、视频、文本等的网格。

如果您正在寻找类似Pinterest的不同高度和/或宽度缩略图的展示，您需要使用第三方插件，如Masonry、Isotope或Salvattore。

默认示例

默认情况下，Bootstrap的缩略图设计为以最少的必需标记展示链接图像。

<div class="row">
  <div class="col-xs-6 col-md-3">
    <a href="#" class="thumbnail">
      <img src="..." alt="...">
    </a>
  </div>
  ...
</div>

自定义内容

With a bit of extra markup, it's possible to add any kind of HTML content like headings, paragraphs, or buttons into thumbnails.

Thumbnail label

Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.

Button Button

Thumbnail label

Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.

Button Button

Thumbnail label

Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.

Button Button

<div class="row">
  <div class="col-sm-6 col-md-4">
    <div class="thumbnail">
      <img src="..." alt="...">
      <div class="caption">
        <h3>Thumbnail label</h3>
        <p>...</p>
        <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
      </div>
    </div>
  </div>
</div>

Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.

Examples

Wrap any text and an optional dismiss button in .alert and one of the four contextual classes (e.g., .alert-success) for basic alert messages.

No default class

Alerts don't have default classes, only base and modifier classes. A default gray alert doesn't make too much sense, so you're required to specify a type via contextual class. Choose from success, info, warning, or danger.

Well done! You successfully read this important alert message.

Heads up! This alert needs your attention, but it's not super important.

Warning! Better check yourself, you're not looking too good.

Oh snap! Change a few things up and try submitting again.

<div class="alert alert-success" role="alert">...</div>
<div class="alert alert-info" role="alert">...</div>
<div class="alert alert-warning" role="alert">...</div>
<div class="alert alert-danger" role="alert">...</div>

Dismissible alerts

Build on any alert by adding an optional .alert-dismissible and close button.

Requires JavaScript alert plugin

For fully functioning, dismissible alerts, you must use the alerts JavaScript plugin.

Warning! Better check yourself, you're not looking too good.

<div class="alert alert-warning alert-dismissible" role="alert">
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
  <strong>Warning!</strong> Better check yourself, you're not looking too good.
</div>

Ensure proper behavior across all devices

Be sure to use the <button> element with the data-dismiss="alert" data attribute.

警告框中的链接

使用.alert-link工具类在任何警告框中快速提供匹配颜色的链接。

Well done! You successfully read this important alert message.

Heads up! This alert needs your attention, but it's not super important.

Warning! Better check yourself, you're not looking too good.

Oh snap! Change a few things up and try submitting again.

<div class="alert alert-success" role="alert">
  <a href="#" class="alert-link">...</a>
</div>
<div class="alert alert-info" role="alert">
  <a href="#" class="alert-link">...</a>
</div>
<div class="alert alert-warning" role="alert">
  <a href="#" class="alert-link">...</a>
</div>
<div class="alert alert-danger" role="alert">
  <a href="#" class="alert-link">...</a>
</div>

使用简单而灵活的进度条为工作流程或操作的进度提供最新反馈。

跨浏览器兼容性

进度条使用CSS3过渡和动画来实现某些效果。这些功能在Internet Explorer 9及以下版本或Firefox的旧版本中不受支持。Opera 12不支持动画。

基本示例

默认进度条。

<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
    <span class="sr-only">60% Complete</span>
  </div>
</div>

带标签

从进度条内移除带有.sr-only类的<span>以显示可见的百分比。

60%

<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
    60%
  </div>
</div>

为了确保标签文本即使在低百分比时也保持清晰可读，请考虑向进度条添加min-width。

0%

2%

<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" style="min-width: 2em;">
    0%
  </div>
</div>
<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="2" aria-valuemin="0" aria-valuemax="100" style="min-width: 2em; width: 2%;">
    2%
  </div>
</div>

上下文替代方案

进度条使用一些相同的按钮和警告框类以保持一致的样式。

<div class="progress">
  <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%">
    <span class="sr-only">40% Complete (success)</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%">
    <span class="sr-only">20% Complete</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%">
    <span class="sr-only">60% Complete (warning)</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%">
    <span class="sr-only">80% Complete (danger)</span>
  </div>
</div>

Striped

Uses a gradient to create a striped effect. Not available in IE9 and below.

<div class="progress">
  <div class="progress-bar progress-bar-success progress-bar-striped" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%">
    <span class="sr-only">40% Complete (success)</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-info progress-bar-striped" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%">
    <span class="sr-only">20% Complete</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-warning progress-bar-striped" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%">
    <span class="sr-only">60% Complete (warning)</span>
  </div>
</div>
<div class="progress">
  <div class="progress-bar progress-bar-danger progress-bar-striped" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%">
    <span class="sr-only">80% Complete (danger)</span>
  </div>
</div>

Animated

Add .active to .progress-bar-striped to animate the stripes right to left. Not available in IE9 and below.

<div class="progress">
  <div class="progress-bar progress-bar-striped active" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 45%">
    <span class="sr-only">45% Complete</span>
  </div>
</div>

堆叠

将多个条放入同一个.progress中以堆叠它们。

<div class="progress">
  <div class="progress-bar progress-bar-success" style="width: 35%">
    <span class="sr-only">35% Complete (success)</span>
  </div>
  <div class="progress-bar progress-bar-warning progress-bar-striped" style="width: 20%">
    <span class="sr-only">20% Complete (warning)</span>
  </div>
  <div class="progress-bar progress-bar-danger" style="width: 10%">
    <span class="sr-only">10% Complete (danger)</span>
  </div>
</div>

用于构建各种类型组件的抽象对象样式（如博客评论、推文等），这些组件具有与文本内容并排的左对齐或右对齐图像。

默认媒体

默认媒体在内容块的左侧或右侧显示媒体对象（图像、视频、音频）。

Media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Nested media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

Media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

<div class="media">
  <div class="media-left">
    <a href="#">
      <img class="media-object" src="..." alt="...">
    </a>
  </div>
  <div class="media-body">
    <h4 class="media-heading">Media heading</h4>
    ...
  </div>
</div>

The classes .pull-left and .pull-right also exist and were previously used as part of the media component, but are deprecated for that use as of v3.3.0. They are approximately equivalent to .media-left and .media-right, except that .media-right should be placed after the .media-body in the html.

Media alignment

The images or other media can be aligned top, middle, or bottom. The default is top aligned.

Top aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

Middle aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

Bottom aligned media

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus.

Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.

<div class="media">
  <div class="media-left media-middle">
    <a href="#">
      <img class="media-object" src="..." alt="...">
    </a>
  </div>
  <div class="media-body">
    <h4 class="media-heading">Middle aligned media</h4>
    ...
  </div>
</div>

Media list

With a bit of extra markup, you can use media inside list (useful for comment threads or articles lists).

Media heading

Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

Nested media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

Nested media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

Nested media heading
Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis.

<ul class="media-list">
  <li class="media">
    <div class="media-left">
      <a href="#">
        <img class="media-object" src="..." alt="...">
      </a>
    </div>
    <div class="media-body">
      <h4 class="media-heading">Media heading</h4>
      ...
    </div>
  </li>
</ul>

列表组是一个灵活而强大的组件，不仅用于显示简单的元素列表，还用于显示具有自定义内容的复杂列表。

基本示例

最基本的列表组只是一个带有列表项和适当类的无序列表。使用以下选项或根据需要使用您自己的CSS来构建它。

Cras justo odio
Dapibus ac facilisis in
Morbi leo risus
Porta ac consectetur ac
Vestibulum at eros

<ul class="list-group">
  <li class="list-group-item">Cras justo odio</li>
  <li class="list-group-item">Dapibus ac facilisis in</li>
  <li class="list-group-item">Morbi leo risus</li>
  <li class="list-group-item">Porta ac consectetur ac</li>
  <li class="list-group-item">Vestibulum at eros</li>
</ul>

徽章

将徽章组件添加到任何列表组项目，它将自动定位在右侧。

14 Cras justo odio
2 Dapibus ac facilisis in
1 Morbi leo risus

<ul class="list-group">
  <li class="list-group-item">
    <span class="badge">14</span>
    Cras justo odio
  </li>
</ul>

链接项目

通过使用锚点标签而不是列表项来链接列表组项目（这也意味着父级<div>而不是<ul>）。不需要在每个元素周围有单独的父级。

Cras justo odio Dapibus ac facilisis in Morbi leo risus Porta ac consectetur ac Vestibulum at eros

<div class="list-group">
  <a href="#" class="list-group-item active">
    Cras justo odio
  </a>
  <a href="#" class="list-group-item">Dapibus ac facilisis in</a>
  <a href="#" class="list-group-item">Morbi leo risus</a>
  <a href="#" class="list-group-item">Porta ac consectetur ac</a>
  <a href="#" class="list-group-item">Vestibulum at eros</a>
</div>

Button items

List group items may be buttons instead of list items (that also means a parent <div> instead of an <ul>). No need for individual parents around each element. Don't use the standard .btn classes here.

<div class="list-group">
  <button type="button" class="list-group-item">Cras justo odio</button>
  <button type="button" class="list-group-item">Dapibus ac facilisis in</button>
  <button type="button" class="list-group-item">Morbi leo risus</button>
  <button type="button" class="list-group-item">Porta ac consectetur ac</button>
  <button type="button" class="list-group-item">Vestibulum at eros</button>
</div>

Disabled items

Add .disabled to a .list-group-item to gray it out to appear disabled.

Cras justo odio Dapibus ac facilisis in Morbi leo risus Porta ac consectetur ac Vestibulum at eros

<div class="list-group">
  <a href="#" class="list-group-item disabled">
    Cras justo odio
  </a>
  <a href="#" class="list-group-item">Dapibus ac facilisis in</a>
  <a href="#" class="list-group-item">Morbi leo risus</a>
  <a href="#" class="list-group-item">Porta ac consectetur ac</a>
  <a href="#" class="list-group-item">Vestibulum at eros</a>
</div>

Contextual classes

Use contextual classes to style list items, default or linked. Also includes .active state.

Dapibus ac facilisis in
Cras sit amet nibh libero
Porta ac consectetur ac
Vestibulum at eros

Dapibus ac facilisis in Cras sit amet nibh libero Porta ac consectetur ac Vestibulum at eros

<ul class="list-group">
  <li class="list-group-item list-group-item-success">Dapibus ac facilisis in</li>
  <li class="list-group-item list-group-item-info">Cras sit amet nibh libero</li>
  <li class="list-group-item list-group-item-warning">Porta ac consectetur ac</li>
  <li class="list-group-item list-group-item-danger">Vestibulum at eros</li>
</ul>
<div class="list-group">
  <a href="#" class="list-group-item list-group-item-success">Dapibus ac facilisis in</a>
  <a href="#" class="list-group-item list-group-item-info">Cras sit amet nibh libero</a>
  <a href="#" class="list-group-item list-group-item-warning">Porta ac consectetur ac</a>
  <a href="#" class="list-group-item list-group-item-danger">Vestibulum at eros</a>
</div>

Custom content

Add nearly any HTML within, even for linked list groups like the one below.

List group item heading

Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.

List group item heading

Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.

List group item heading

Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.

<div class="list-group">
  <a href="#" class="list-group-item active">
    <h4 class="list-group-item-heading">List group item heading</h4>
    <p class="list-group-item-text">...</p>
  </a>
</div>

虽然并不总是必要的，但有时您需要将DOM放在一个盒子中。对于这些情况，请尝试面板组件。

基本示例

默认情况下，.panel所做的就是应用一些基本的边框和填充来包含一些内容。

Basic panel example

<div class="panel panel-default">
  <div class="panel-body">
    Basic panel example
  </div>
</div>

带标题的面板

使用.panel-heading轻松向面板添加标题容器。您还可以包含任何带有.panel-title类的<h1>-<h6>来添加预样式的标题。

为了正确的链接颜色，请确保将链接放在.panel-title内的标题中。

Panel heading without title

Panel content

Panel title

Panel content

<div class="panel panel-default">
  <div class="panel-heading">Panel heading without title</div>
  <div class="panel-body">
    Panel content
  </div>
</div>

<div class="panel panel-default">
  <div class="panel-heading">
    <h3 class="panel-title">Panel title</h3>
  </div>
  <div class="panel-body">
    Panel content
  </div>
</div>

带页脚的面板

在.panel-footer中包装按钮或次要文本。请注意，面板页脚在使用上下文变化时不会继承颜色和边框，因为它们不打算在前景中。

Panel content

Panel footer

<div class="panel panel-default">
  <div class="panel-body">
    Panel content
  </div>
  <div class="panel-footer">Panel footer</div>
</div>

上下文替代方案

像其他组件一样，通过添加任何上下文状态类，轻松使面板对特定上下文更有意义。

Panel title

Panel content

Panel title

Panel content

Panel title

Panel content

Panel title

Panel content

Panel title

Panel content

<div class="panel panel-primary">...</div>
<div class="panel panel-success">...</div>
<div class="panel panel-info">...</div>
<div class="panel panel-warning">...</div>
<div class="panel panel-danger">...</div>

With tables

Add any non-bordered .table within a panel for a seamless design. If there is a .panel-body, we add an extra border to the top of the table for separation.

Panel heading

Some default panel content here. Nulla vitae elit libero, a pharetra augue. Aenean lacinia bibendum nulla sed consectetur. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum. Nullam id dolor id nibh ultricies vehicula ut id elit.

#	First Name	Last Name	Username
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter

<div class="panel panel-default">
  <!-- Default panel contents -->
  <div class="panel-heading">Panel heading</div>
  <div class="panel-body">
    <p>...</p>
  </div>

  <!-- Table -->
  <table class="table">
    ...
  </table>
</div>

If there is no panel body, the component moves from panel header to table without interruption.

Panel heading

#	First Name	Last Name	Username
1	Mark	Otto	@mdo
2	Jacob	Thornton	@fat
3	Larry	the Bird	@twitter

<div class="panel panel-default">
  <!-- Default panel contents -->
  <div class="panel-heading">Panel heading</div>

  <!-- Table -->
  <table class="table">
    ...
  </table>
</div>

带列表组

轻松在任何面板中包含全宽列表组。

Panel heading

Some default panel content here. Nulla vitae elit libero, a pharetra augue. Aenean lacinia bibendum nulla sed consectetur. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum. Nullam id dolor id nibh ultricies vehicula ut id elit.

Cras justo odio
Dapibus ac facilisis in
Morbi leo risus
Porta ac consectetur ac
Vestibulum at eros

<div class="panel panel-default">
  <!-- Default panel contents -->
  <div class="panel-heading">Panel heading</div>
  <div class="panel-body">
    <p>...</p>
  </div>

  <!-- List group -->
  <ul class="list-group">
    <li class="list-group-item">Cras justo odio</li>
    <li class="list-group-item">Dapibus ac facilisis in</li>
    <li class="list-group-item">Morbi leo risus</li>
    <li class="list-group-item">Porta ac consectetur ac</li>
    <li class="list-group-item">Vestibulum at eros</li>
  </ul>
</div>

通过创建内在比例，允许浏览器根据其包含块的宽度确定视频或幻灯片尺寸，该比例将在任何设备上正确缩放。

规则直接应用于<iframe>、<embed>、<video>和<object>元素；当您想要匹配其他属性的样式时，可选择使用显式后代类.embed-responsive-item。

专业提示！您不需要在<iframe>中包含frameborder="0"，因为我们会为您覆盖它。

<!-- 16:9 aspect ratio -->
<div class="embed-responsive embed-responsive-16by9">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

<!-- 4:3 aspect ratio -->
<div class="embed-responsive embed-responsive-4by3">
  <iframe class="embed-responsive-item" src="..."></iframe>
</div>

默认井

使用井作为元素上的简单效果，给它一个内嵌效果。

Look, I'm in a well!

<div class="well">...</div>

Optional classes

Control padding and rounded corners with two optional modifier classes.

Look, I'm in a large well!

<div class="well well-lg">...</div>

Look, I'm in a small well!

<div class="well well-sm">...</div>

组件

图标字体

可用图标

如何使用

不要与其他组件混合使用

仅用于空元素

更改图标字体位置

无障碍图标

示例

Dropdowns

Example

Alignment

May require additional positioning

Deprecated .pull-right alignment

Headers

分隔符

禁用的菜单项

按钮组

按钮组中的工具提示和弹出框需要特殊设置

确保正确的role并提供标签

基本示例

按钮工具栏

尺寸

嵌套

垂直变化

Justified button groups

Handling borders

IE8 and borders

With <a> elements

Links acting as buttons

With <button> elements

按钮下拉菜单

插件依赖

单个按钮下拉菜单

分割按钮下拉菜单

Sizing

向上弹出变化

Input groups

Textual <input>s only

Tooltips & popovers in input groups require special setting

Don't mix with other components

Always add labels

Basic example

Sizing

复选框和单选按钮附加组件

按钮附加组件

带下拉菜单的按钮

Segmented buttons

导航

将导航用于标签面板需要JavaScript标签插件

使用作导航的导航具有无障碍性

标签页

胶囊导航

两端对齐

Safari和响应式两端对齐导航

Disabled links

Link functionality not impacted

Using dropdowns

Tabs with dropdowns

Pills with dropdowns

Navbar

Default navbar

内容溢出

需要JavaScript插件

更改折叠的移动导航栏断点

使导航栏具有无障碍性

Brand image

Forms

Mobile device caveats

Always add labels

Buttons

Context-specific usage

Text

Non-nav links

Component alignment

Right aligning multiple components

Fixed to top

需要body填充

固定到底部

需要body填充

Deprecated `.pull-right` alignment

确保正确的`role`并提供标签

With `<a>` elements

With `<button>` elements

Textual `<input>`s only