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    Button class="" Description
    btn Standard gray button with gradient
    btn btn-primary Provides extra visual weight and identifies the primary action in a set of buttons
    btn btn-info Used as an alternate to the default styles
    btn btn-success Indicates a successful or positive action
    btn btn-warning Indicates caution should be taken with this action
    btn btn-danger Indicates a dangerous or potentially negative action
    btn btn-inverse Alternate dark gray button, not tied to a semantic action or use

    Buttons for actions

    As a convention, buttons should only be used for actions while hyperlinks are to be used for objects. For instance, "Download" should be a button while "recent activity" should be a link.

    Button styles can be applied to anything with the .btn class applied. However, typically you'll want to apply these to only <a> and <button> elements.

    Cross browser compatibility

    IE9 doesn't crop background gradients on rounded corners, so we remove it. Related, IE9 jankifies disabled button elements, rendering text gray with a nasty text-shadow that we cannot fix.

    Multiple sizes

    Fancy larger or smaller buttons? Add .btn-large, .btn-small, or .btn-mini for two additional sizes.


    Disabled state

    For disabled buttons, add the .disabled class to links and the disabled attribute for <button> elements.

    Primary link Link

    Heads up! We use .disabled as a utility class here, similar to the common .active class, so no prefix is required.

    One class, multiple tags

    Use the .btn class on an <a>, <button>, or <input> element.

    Link
    <a class="btn" href="">Link</a>
    <button class="btn" type="submit">
      Button
    </button>
    <input class="btn" type="button"
             value="Input">
    <input class="btn" type="submit"
             value="Submit">

    As a best practice, try to match the element for you context to ensure matching cross-browser rendering. If you have an input, use an <input type="submit"> for your button.

    • icon-glass
    • icon-music
    • icon-search
    • icon-envelope
    • icon-heart
    • icon-star
    • icon-star-empty
    • icon-user
    • icon-film
    • icon-th-large
    • icon-th
    • icon-th-list
    • icon-ok
    • icon-remove
    • icon-zoom-in
    • icon-zoom-out
    • icon-off
    • icon-signal
    • icon-cog
    • icon-trash
    • icon-home
    • icon-file
    • icon-time
    • icon-road
    • icon-download-alt
    • icon-download
    • icon-upload
    • icon-inbox
    • icon-play-circle
    • icon-repeat
    • icon-refresh
    • icon-list-alt
    • icon-lock
    • icon-flag
    • icon-headphones
    • icon-volume-off
    • icon-volume-down
    • icon-volume-up
    • icon-qrcode
    • icon-barcode
    • icon-tag
    • icon-tags
    • icon-book
    • icon-bookmark
    • icon-print
    • icon-camera
    • icon-font
    • icon-bold
    • icon-italic
    • icon-text-height
    • icon-text-width
    • icon-align-left
    • icon-align-center
    • icon-align-right
    • icon-align-justify
    • icon-list
    • icon-indent-left
    • icon-indent-right
    • icon-facetime-video
    • icon-picture
    • icon-pencil
    • icon-map-marker
    • icon-adjust
    • icon-tint
    • icon-edit
    • icon-share
    • icon-check
    • icon-move
    • icon-step-backward
    • icon-fast-backward
    • icon-backward
    • icon-play
    • icon-pause
    • icon-stop
    • icon-forward
    • icon-fast-forward
    • icon-step-forward
    • icon-eject
    • icon-chevron-left
    • icon-chevron-right
    • icon-plus-sign
    • icon-minus-sign
    • icon-remove-sign
    • icon-ok-sign
    • icon-question-sign
    • icon-info-sign
    • icon-screenshot
    • icon-remove-circle
    • icon-ok-circle
    • icon-ban-circle
    • icon-arrow-left
    • icon-arrow-right
    • icon-arrow-up
    • icon-arrow-down
    • icon-share-alt
    • icon-resize-full
    • icon-resize-small
    • icon-plus
    • icon-minus
    • icon-asterisk
    • icon-exclamation-sign
    • icon-gift
    • icon-leaf
    • icon-fire
    • icon-eye-open
    • icon-eye-close
    • icon-warning-sign
    • icon-plane
    • icon-calendar
    • icon-random
    • icon-comment
    • icon-magnet
    • icon-chevron-up
    • icon-chevron-down
    • icon-retweet
    • icon-shopping-cart
    • icon-folder-close
    • icon-folder-open
    • icon-resize-vertical
    • icon-resize-horizontal

    Built as a sprite

    Instead of making every icon an extra request, we've compiled them into a sprite—a bunch of images in one file that uses CSS to position the images with background-position. This is the same method we use on Twitter.com and it has worked well for us.

    All icons classes are prefixed with .icon- for proper namespacing and scoping, much like our other components. This will help avoid conflicts with other tools.

    Glyphicons has granted us use of the Halflings set in our open-source toolkit so long as we provide a link and credit here in the docs. Please consider doing the same in your projects.

    How to use

    Bootstrap uses an <i> tag for all icons, but they have no case class—only a shared prefix. To use, place the following code just about anywhere:

    <i class="icon-search"></i>
    

    There are also styles available for inverted (white) icons, made ready with one extra class:

    <i class="icon-search icon-white"></i>

    There are 120 classes to choose from for your icons. Just add an <i> tag with the right classes and you're set. You can find the full list in sprites.less or right here in this document.

    Heads up! When using beside strings of text, as in buttons or nav links, be sure to leave a space after the <i> tag for proper spacing.

    Use cases

    Icons are great, but where would one use them? Here are a few ideas:

    • As visuals for your sidebar navigation
    • For a purely icon-driven navigation
    • For buttons to help convey the meaning of an action
    • With links to share context on a user's destination

    Essentially, anywhere you can put an <i> tag, you can put an icon.

    Examples

    Use them in buttons, button groups for a toolbar, navigation, or prepended form inputs.

    Flexible HTML and CSS

    The best part about forms in Bootstrap is that all your inputs and controls look great no matter how you build them in your markup. No superfluous HTML is required, but we provide the patterns for those who require it.

    More complicated layouts come with succinct and scalable classes for easy styling and event binding, so you're covered at every step.

    Four layouts included

    Bootstrap comes with support for four types of form layouts:

    • Vertical (default)
    • Search
    • Inline
    • Horizontal

    Different types of form layouts require some changes to markup, but the controls themselves remain and behave the same.

    Control states and more

    Bootstrap's forms include styles for all the base form controls like input, textarea, and select you'd expect. But it also comes with a number of custom components like appended and prepended inputs and support for lists of checkboxes.

    States like error, warning, and success are included for each type of form control. Also included are styles for disabled controls.

    Four types of forms

    Bootstrap provides simple markup and styles for four styles of common web forms.

    Name Class Description
    Vertical (default) .form-vertical (not required) Stacked, left-aligned labels over controls
    Inline .form-inline Left-aligned label and inline-block controls for compact style
    Search .form-search Extra-rounded text input for a typical search aesthetic
    Horizontal .form-horizontal Float left, right-aligned labels on same line as controls

    Example forms using just form controls, no extra markup

    Basic form

    With v2.0, we have lighter and smarter defaults for form styles. No extra markup, just form controls.

    Associated help text!

    Example block-level help text here.

    <form class="well">
      <label>Label name</label>
      <input type="text" class="span3" placeholder="Type something">
      <span class="help-inline">Associated help text!</span>
      <label class="checkbox">
        <input type="checkbox"> Check me out
      </label>
      <button type="submit" class="btn">Submit</button>
    </form>

    Search form

    Reflecting default WebKit styles, just add .form-search for extra rounded search fields.

    <form class="well form-search">
      <input type="text" class="input-medium search-query">
      <button type="submit" class="btn">Search</button>
    </form>

    Inline form

    Inputs are block level to start. For .form-inline and .form-horizontal, we use inline-block.

    <form class="well form-inline">
      <input type="text" class="input-small" placeholder="Email">
      <input type="password" class="input-small" placeholder="Password">
      <label class="checkbox">
        <input type="checkbox"> Remember me
      </label>
      <button type="submit" class="btn">Sign in</button>
    </form>

    Horizontal forms

    Controls Bootstrap supports

    In addition to freeform text, any HTML5 text-based input appears like so.

    Example markup

    Given the above example form layout, here's the markup associated with the first input and control group. The .control-group, .control-label, and .controls classes are all required for styling.

    <form class="form-horizontal">
      <fieldset>
        <legend>Legend text</legend>
        <div class="control-group">
          <label class="control-label" for="input01">Text input</label>
          <div class="controls">
            <input type="text" class="input-xlarge" id="input01">
            <p class="help-block">Supporting help text</p>
          </div>
        </div>
      </fieldset>
    </form>

    What's included

    Shown on the left are all the default form controls we support. Here's the bulleted list:

    • text inputs (text, password, email, etc)
    • checkbox
    • radio
    • select
    • multiple select
    • file input
    • textarea

    New defaults with v2.0

    Up to v1.4, Bootstrap's default form styles used the horizontal layout. With Bootstrap 2, we removed that constraint to have smarter, more scalable defaults for any form.


    Form control states
    Some value here
    Something may have gone wrong
    Please correct the error
    Woohoo!
    Woohoo!

    Redesigned browser states

    Bootstrap features styles for browser-supported focused and disabled states. We remove the default Webkit outline and apply a box-shadow in its place for :focus.


    Form validation

    It also includes validation styles for errors, warnings, and success. To use, add the error class to the surrounding .control-group.

    <fieldset
      class="control-group error">
      
    </fieldset>

    Extending form controls

    Use the same .span* classes from the grid system for input sizes.

    You may also use static classes that don't map to the grid, adapt to the responsive CSS styles, or account for varying types of controls (e.g., input vs. select).

    @

    Here's some help text

    .00
    Here's more help text
    $.00

    Note: Labels surround all the options for much larger click areas and a more usable form.

    Prepend & append inputs

    Input groups—with appended or prepended text—provide an easy way to give more context for your inputs. Great examples include the @ sign for Twitter usernames or $ for finances.


    Checkboxes and radios

    Up to v1.4, Bootstrap required extra markup around checkboxes and radios to stack them. Now, it's a simple matter of repeating the <label class="checkbox"> that wraps the <input type="checkbox">.

    Inline checkboxes and radios are also supported. Just add .inline to any .checkbox or .radio and you're done.


    Inline forms and append/prepend

    To use prepend or append inputs in an inline form, be sure to place the .add-on and input on the same line, without spaces.


    Form help text

    To add help text for your form inputs, include inline help text with <span class="help-inline"> or a help text block with <p class="help-block"> after the input element.

    Inline

    Wrap inline snippets of code with <code>.

    For example, <code>section</code> should be wrapped as inline.

    Basic block

    Use <pre> for multiple lines of code. Be sure to escape any angle brackets in the code for proper rendering.

    <p>Sample text here...</p>
    
    <pre>
      &lt;p&gt;Sample text here...&lt;/p&gt;
    </pre>

    Note: Be sure to keep code within <pre> tags as close to the left as possible; it will render all tabs.

    You may optionally add the .pre-scrollable class which will set a max-height of 350px and provide a y-axis scrollbar.

    Google Prettify

    Take the same <pre> element and add two optional classes for enhanced rendering.

    <p>Sample text here...</p>
    
    <pre class="prettyprint
         linenums">
      &lt;p&gt;Sample text here...&lt;/p&gt;
    </pre>

    Download google-code-prettify and view the readme for how to use.

    Button groups

    Use button groups to join multiple buttons together as one composite component. Build them with a series of <a> or <button> elements.

    Best practices

    We recommend the following guidelines for using button groups and toolbars:

    • Always use the same element in a single button group, <a> or <button>.
    • Don't mix buttons of different colors in the same button group.
    • Use icons in addition to or instead of text, but be sure include alt and title text where appropriate.

    Related Button groups with dropdowns (see below) should be called out separately and always include a dropdown caret to indicate intended behavior.

    Default example

    Here's how the HTML looks for a standard button group built with anchor tag buttons:

    <div class="btn-group">
      <button class="btn">1</button>
      <button class="btn">2</button>
      <button class="btn">3</button>
    </div>

    Toolbar example

    Combine sets of <div class="btn-group"> into a <div class="btn-toolbar"> for more complex components.

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

    Checkbox and radio flavors

    Button groups can also function as radios, where only one button may be active, or checkboxes, where any number of buttons may be active. View the Javascript docs for that.

    Get the javascript »

    Dropdowns in button groups

    Heads up! Buttons with dropdowns must be individually wrapped in their own .btn-group within a .btn-toolbar for proper rendering.

    Button dropdowns

    Example markup

    Similar to a button group, our markup uses regular button markup, but with a handful of additions to refine the style and support Bootstrap's dropdown jQuery plugin.

    <div class="btn-group">
      <a class="btn dropdown-toggle" data-toggle="dropdown" href="#">
        Action
        <span class="caret"></span>
      </a>
      <ul class="dropdown-menu">
        <!-- dropdown menu links -->
      </ul>
    </div>

    Works with all button sizes

    Button dropdowns work at any size. your button sizes to .btn-large, .btn-small, or .btn-mini.

    Requires javascript

    Button dropdowns require the Bootstrap dropdown plugin to function.

    In some cases—like mobile—dropdown menus will extend outside the viewport. You need to resolve the alignment manually or with custom javascript.


    Split button dropdowns

    Overview and examples

    Building on the button group styles and markup, we can easily create a split button. Split buttons feature a standard action on the left and a dropdown toggle on the right with contextual links.

    Sizes

    Utilize the extra button classe .btn-mini, .btn-small, or .btn-large for sizing.

    <div class="btn-group">
      ...
      <ul class="dropdown-menu pull-right">
        <!-- dropdown menu links -->
      </ul>
    </div>

    Example markup

    We expand on the normal button dropdowns to provide a second button action that operates as a separate dropdown trigger.

    <div class="btn-group">
      <button class="btn">Action</button>
      <button class="btn dropdown-toggle" data-toggle="dropdown">
        <span class="caret"></span>
      </button>
      <ul class="dropdown-menu">
        <!-- dropdown menu links -->
      </ul>
    </div>

    Dropup menus

    Dropdown menus can also be toggled from the bottom up by adding a single class to the immediate parent of .dropdown-menu. It will flip the direction of the .caret and reposition the menu itself to move from the bottom up instead of top down.

    <div class="btn-group dropup">
      <button class="btn">Dropup</button>
      <button class="btn dropdown-toggle" data-toggle="dropdown">
        <span class="caret"></span>
      </button>
      <ul class="dropdown-menu">
        <!-- dropdown menu links -->
      </ul>
    </div>

    Multicon-page pagination

    When to use

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

    Stateful page links

    Links are customizable and work in a number of circumstances with the right class. .disabled for unclickable links and .active for current page.

    Flexible alignment

    Add either of two optional classes to change the alignment of pagination links: .pagination-centered and .pagination-right.

    Examples

    The default pagination component is flexible and works in a number of variations.

    Markup

    Wrapped in a <div>, pagination is just a <ul>.

    <div class="pagination">
      <ul>
        <li><a href="#">Prev</a></li>
        <li class="active">
          <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="#">Next</a></li>
      </ul>
    </div>

    Pager For quick previous and next links

    About pager

    The pager component is a set of links for simple pagination implementations with light markup and even lighter styles. It's great for simple sites like blogs or magazines.

    Optional disabled state

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

    Default example

    By default, the pager centers links.

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

    Aligned links

    Alternatively, you can align each link to the sides:

    <ul class="pager">
      <li class="previous">
        <a href="#">&larr; Older</a>
      </li>
      <li class="next">
        <a href="#">Newer &rarr;</a>
      </li>
    </ul>
    Labels Markup
    Default <span class="label">Default</span>
    Success <span class="label label-success">Success</span>
    Warning <span class="label label-warning">Warning</span>
    Important <span class="label label-important">Important</span>
    Info <span class="label label-info">Info</span>
    Inverse <span class="label label-inverse">Inverse</span>

    About

    Badges are small, simple components for displaying an indicator or count of some sort. They're commonly found in email clients like Mail.app or on mobile apps for push notifications.

    Available classes

    Name Example Markup
    Default 1 <span class="badge">1</span>
    Success 2 <span class="badge badge-success">2</span>
    Warning 4 <span class="badge badge-warning">4</span>
    Error 6 <span class="badge badge-error">6</span>
    Info 8 <span class="badge badge-info">8</span>
    Inverse 10 <span class="badge badge-inverse">10</span>

    Lightweight defaults

    Rewritten base class

    With Bootstrap 2, we've simplified the base class: .alert instead of .alert-message. We've also reduced the minimum required markup—no <p> is required by default, just the outer <div>.

    Single alert message

    For a more durable component with less code, we've removed the differentiating look for block alerts, messages that come with more padding and typically more text. The class also has changed to .alert-block.


    Goes great with javascript

    Bootstrap comes with a great jQuery plugin that supports alert messages, making dismissing them quick and easy.

    Get the plugin »

    Example alerts

    Wrap your message and an optional close icon in a div with simple class.

    × Warning! Best check yo self, you're not looking too good.
    <div class="alert">
      <a class="close" data-dismiss="alert">×</a>
      <strong>Warning!</strong> Best check yo self, you're not looking too good.
    </div>

    Easily extend the standard alert message with two optional classes: .alert-block for more padding and text controls and .alert-heading for a matching heading.

    ×

    Warning!

    Best check yo self, you're not looking too good. Nulla vitae elit libero, a pharetra augue. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

    <div class="alert alert-block">
      <a class="close" data-dismiss="alert">×</a>
      <h4 class="alert-heading">Warning!</h4>
      Best check yo self, you're not...
    </div>

    Contextual alternatives Add optional classes to change an alert's connotation

    Error or danger

    × Oh snap! Change a few things up and try submitting again.
    <div class="alert alert-error">
      ...
    </div>

    Success

    × Well done! You successfully read this important alert message.
    <div class="alert alert-success">
      ...
    </div>

    Information

    × Heads up! This alert needs your attention, but it's not super important.
    <div class="alert alert-info">
      ...
    </div>

    Examples and markup

    Basic

    Default progress bar with a vertical gradient.

    <div class="progress">
      <div class="bar"
           style="width: 60%;"></div>
    </div>

    Striped

    Uses a gradient to create a striped effect (no IE).

    <div class="progress progress-striped">
      <div class="bar"
           style="width: 20%;"></div>
    </div>

    Animated

    Takes the striped example and animates it (no IE).

    <div class="progress progress-striped
         active">
      <div class="bar"
           style="width: 40%;"></div>
    </div>

    Options and browser support

    Additional colors

    Progress bars use some of the same button and alert classes for consistent styles.

    Striped bars

    Similar to the solid colors, we have varied striped progress bars.

    Behavior

    Progress bars use CSS3 transitions, so if you dynamically adjust the width via javascript, it will smoothly resize.

    If you use the .active class, your .progress-striped progress bars will animate the stripes left to right.

    Browser support

    Progress bars use CSS3 gradients, transitions, and animations to achieve all their effects. These features are not supported in IE7-9 or older versions of Firefox.

    Opera and IE do not support animations at this time.

    Wells

    Use the well as a simple effect on an element to give it an inset effect.

    Look, I'm in a well!
    <div class="well">
      ...
    </div>

    /// Close icon

    Use the generic close icon for dismissing content like modals and alerts.

    ×

    <a class="close">&times;</a>
    深圳快乐彩开奖号码
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