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


      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.


      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.


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


      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.


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

      <a class="btn" href="">Link</a>
      <button class="btn" type="submit">
      <input class="btn" type="button"
      <input class="btn" type="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


      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 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.


      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 阅读y 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.


      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.


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


      The best part 关于 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.

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


      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.


      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.


      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千亿国际网站多少|首页登录


      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
        <button type="submit" class="btn">Submit</button>


      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>


      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
        <button type="submit" class="btn">Sign in</button>


      Controls Bootstrap supports

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