Headings

All HTML headings, <h1> through <h6> are available.

h1. Heading 1

h2. Heading 2

h3. Heading 3

h4. Heading 4

h5. Heading 5

h6. Heading 6

Body copy

Bootstrap's global default font-size is 14px, with a line-height of 20px. This is applied to the <body> and all paragraphs. In addition, <p> (paragraphs) receive a bottom margin of half their line-height (10px by default).

Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nullam id dolor id nibh ultricies vehicula.

Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec ullamcorper nulla non metus auctor fringilla. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Donec ullamcorper nulla non metus auctor fringilla.

Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit.

<p>...</p>

Lead body copy

Make a paragraph stand out by adding .lead.

Vivamus sagittis lacus vel augue laoreet rutrum faucibus dolor auctor. Duis mollis, est non commodo luctus.

<p class="lead">...</p>

Built with Less

The typographic scale is based on two LESS variables in variables.less: @baseFontSize and @baseLineHeight. The first is the base font-size used throughout and the second is the base line-height. We use those variables and some simple math to create the margins, paddings, and line-heights of all our type and more. Customize them and Bootstrap adapts.

Emphasis

Make use of HTML's default emphasis tags with lightweight styles.

`<small>`

For de-emphasizing inline or blocks of text, use the small tag.

This line of text is meant to be treated as fine print.

<p>
  <small>This line of text is meant to be treated as fine print.</small>
</p>

Bold

For emphasizing a snippet of text with a heavier font-weight.

The following snippet of text is rendered as bold text.

<strong>rendered as bold text</strong>

Italics

For emphasizing a snippet of text with italics.

The following snippet of text is rendered as italicized text.

<em>rendered as italicized text</em>

Heads up! Feel free to use <b> and <i> in HTML5. <b> is meant to highlight words or phrases without conveying additional importance while <i> is mostly for voice, technical terms, etc.

Alignment classes

Easily realign text to components with text alignment classes.

Left aligned text.

Center aligned text.

Right aligned text.

<p class="text-left">Left aligned text.</p>
<p class="text-center">Center aligned text.</p>
<p class="text-right">Right aligned text.</p>

Emphasis classes

Convey meaning through color with a handful of emphasis utility classes.

Fusce dapibus, tellus ac cursus commodo, tortor mauris nibh.

Etiam porta sem malesuada magna mollis euismod.

Donec ullamcorper nulla non metus auctor fringilla.

Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis.

Duis mollis, est non commodo luctus, nisi erat porttitor ligula.

<p class="muted">Fusce dapibus, tellus ac cursus commodo, tortor mauris nibh.</p>
<p class="text-warning">Etiam porta sem malesuada magna mollis euismod.</p>
<p class="text-error">Donec ullamcorper nulla non metus auctor fringilla.</p>
<p class="text-info">Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis.</p>
<p class="text-success">Duis mollis, est non commodo luctus, nisi erat porttitor ligula.</p>

Abbreviations

Stylized implementation of HTML's <abbr> element for abbreviations and acronyms to show the expanded version on hover. Abbreviations with a title attribute have a light dotted bottom border and a help cursor on hover, providing additional context on hover.

`<abbr>`

For expanded text on long hover of an abbreviation, include the title attribute.

An abbreviation of the word attribute is attr.

<abbr title="attribute">attr</abbr>

`<abbr class="initialism">`

Add .initialism to an abbreviation for a slightly smaller font-size.

HTML is the best thing since sliced bread.

<abbr title="HyperText Markup Language" class="initialism">HTML</abbr>

Addresses

Present contact information for the nearest ancestor or the entire body of work.

`<address>`

Preserve formatting by ending all lines with <br>.

Twitter, Inc.
795 Folsom Ave, Suite 600
San Francisco, CA 94107
P: (123) 456-7890

Full Name
first.last@example.com

<address>
  <strong>Twitter, Inc.</strong><br>
  795 Folsom Ave, Suite 600<br>
  San Francisco, CA 94107<br>
  <abbr title="Phone">P:</abbr> (123) 456-7890
</address>

<address>
  <strong>Full Name</strong><br>
  <a href="mailto:#">first.last@example.com</a>
</address>

Blockquotes

For quoting blocks of content from another source within your document.

Default blockquote

Wrap <blockquote> around any HTML as the quote. For straight quotes we recommend a <p>.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.

<blockquote>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
</blockquote>

Blockquote options

Style and content changes for simple variations on a standard blockquote.

Naming a source

Add <small> tag for identifying the source. Wrap the name of the source work in <cite>.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.
Someone famous in Source Title

<blockquote>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
  <small>Someone famous <cite title="Source Title">Source Title</cite></small>
</blockquote>

Alternate displays

Use .pull-right for a floated, right-aligned blockquote.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.
Someone famous in Source Title

<blockquote class="pull-right">
  ...
</blockquote>

Lists

Unordered

A list of items in which the order does not explicitly matter.

Lorem ipsum dolor sit amet
Consectetur adipiscing elit
Integer molestie lorem at massa
Facilisis in pretium nisl aliquet
Nulla volutpat aliquam velit
- Phasellus iaculis neque
- Purus sodales ultricies
- Vestibulum laoreet porttitor sem
- Ac tristique libero volutpat at
Faucibus porta lacus fringilla vel
Aenean sit amet erat nunc
Eget porttitor lorem

<ul>
  <li>...</li>
</ul>

Ordered

A list of items in which the order does explicitly matter.

Lorem ipsum dolor sit amet
Consectetur adipiscing elit
Integer molestie lorem at massa
Facilisis in pretium nisl aliquet
Nulla volutpat aliquam velit
Faucibus porta lacus fringilla vel
Aenean sit amet erat nunc
Eget porttitor lorem

<ol>
  <li>...</li>
</ol>

Unstyled

Remove the default list-style and left padding on list items (immediate children only).

Lorem ipsum dolor sit amet
Consectetur adipiscing elit
Integer molestie lorem at massa
Facilisis in pretium nisl aliquet
Nulla volutpat aliquam velit
- Phasellus iaculis neque
- Purus sodales ultricies
- Vestibulum laoreet porttitor sem
- Ac tristique libero volutpat at
Faucibus porta lacus fringilla vel
Aenean sit amet erat nunc
Eget porttitor lorem

<ul class="unstyled">
  <li>...</li>
</ul>

Inline

Place all list items on a single line with inline-block and some light padding.

Lorem ipsum
Phasellus iaculis
Nulla volutpat

<ul class="inline">
  <li>...</li>
</ul>

Description

A list of terms with their associated descriptions.

Description lists: A description list is perfect for defining terms.
Euismod: Vestibulum id ligula porta felis euismod semper eget lacinia odio sem nec elit.; Donec id elit non mi porta gravida at eget metus.
Malesuada porta: Etiam porta sem malesuada magna mollis euismod.

<dl>
  <dt>...</dt>
  <dd>...</dd>
</dl>

Horizontal description

Make terms and descriptions in <dl> line up side-by-side.

Description lists: A description list is perfect for defining terms.
Euismod: Vestibulum id ligula porta felis euismod semper eget lacinia odio sem nec elit.; Donec id elit non mi porta gravida at eget metus.
Malesuada porta: Etiam porta sem malesuada magna mollis euismod.
Felis euismod semper eget lacinia: Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.

<dl class="dl-horizontal">
  <dt>...</dt>
  <dd>...</dd>
</dl>

Heads up! Horizontal description lists will truncate terms that are too long to fit in the left column fix text-overflow. In narrower viewports, they will change to the default stacked layout.

Inline

Wrap inline snippets of code with <code>.

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

For example, <code>&lt;section&gt;</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>

Heads up! 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.

Default styles 默认样式

For basic styling—light padding and only horizontal dividers—add the base class .table to any <table>.

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

<table class="table">
  …
</table>

Optional classes

Add any of the following classes to the .table base class.

`.table-striped`

Adds zebra-striping to any table row within the <tbody> via the :nth-child CSS selector (not available in IE7-8).

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

<table class="table table-striped">
  …
</table>

`.table-bordered`

Add borders and rounded corners to the table.

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

<table class="table table-bordered">
  …
</table>

`.table-hover`

Enable a hover state on table rows within a <tbody>.

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

<table class="table table-hover">
  …
</table>

`.table-condensed`

Makes tables more compact by cutting cell padding in half.

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

<table class="table table-condensed">
  …
</table>

Optional row classes

Use contextual classes to color table rows.

Class	Description
`.success`	Indicates a successful or positive action.
`.error`	Indicates a dangerous or potentially negative action.
`.warning`	Indicates a warning that might need attention.
`.info`	Used as an alternative to the default styles.

#	Product	Payment Taken	Status
1	TB - Monthly	01/04/2012	Approved
2	TB - Monthly	02/04/2012	Declined
3	TB - Monthly	03/04/2012	Pending
4	TB - Monthly	04/04/2012	Call in to confirm

...
  <tr class="success">
    <td>1</td>
    <td>TB - Monthly</td>
    <td>01/04/2012</td>
    <td>Approved</td>
  </tr>
...

Supported table markup

List of supported table HTML elements and how they should be used.

Tag	Description
`<table>`	Wrapping element for displaying data in a tabular format
`<thead>`	Container element for table header rows (`<tr>`) to label table columns
`<tbody>`	Container element for table rows (`<tr>`) in the body of the table
`<tr>`	Container element for a set of table cells (`<td>` or `<th>`) that appears on a single row
`<td>`	Default table cell
`<th>`	Special table cell for column (or row, depending on scope and placement) labels
`<caption>`	Description or summary of what the table holds, especially useful for screen readers

<table>
  <caption>...</caption>
  <thead>
    <tr>
      <th>...</th>
      <th>...</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>...</td>
      <td>...</td>
    </tr>
  </tbody>
</table>

Default styles 默认样式

Individual form controls receive styling, but without any required base class on the <form> or large changes in markup. Results in stacked, left-aligned labels on top of form controls.

<form>
  <fieldset>
    <legend>Legend</legend>
    <label>Label name</label>
    <input type="text" placeholder="Type something…">
    <span class="help-block">Example block-level help text here.</span>
    <label class="checkbox">
      <input type="checkbox"> Check me out
    </label>
    <button type="submit" class="btn">Submit</button>
  </fieldset>
</form>

Optional layouts

Included with Bootstrap are three optional form layouts for common use cases.

Search form

Add .form-search to the form and .search-query to the <input> for an extra-rounded text input.

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

Inline form

Add .form-inline for left-aligned labels and inline-block controls for a compact layout.

<form class="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 form

Right align labels and float them to the left to make them appear on the same line as controls. Requires the most markup changes from a default form:

Add .form-horizontal to the form
Wrap labels and controls in .control-group
Add .control-label to the label
Wrap any associated controls in .controls for proper alignment

<form class="form-horizontal">
  <div class="control-group">
    <label class="control-label" for="inputEmail">Email</label>
    <div class="controls">
      <input type="text" id="inputEmail" placeholder="Email">
    </div>
  </div>
  <div class="control-group">
    <label class="control-label" for="inputPassword">Password</label>
    <div class="controls">
      <input type="password" id="inputPassword" placeholder="Password">
    </div>
  </div>
  <div class="control-group">
    <div class="controls">
      <label class="checkbox">
        <input type="checkbox"> Remember me
      </label>
      <button type="submit" class="btn">Sign in</button>
    </div>
  </div>
</form>

Supported form controls

Examples of standard form controls supported in an example form layout.

Inputs

Most common form control, text-based input fields. Includes support for all HTML5 types: text, password, datetime, datetime-local, date, month, time, week, number, email, url, search, tel, and color.

Requires the use of a specified type at all times.

<input type="text" placeholder="Text input">

Textarea

Form control which supports multiple lines of text. Change rows attribute as necessary.

<textarea rows="3"></textarea>

Checkboxes and radios

Checkboxes are for selecting one or several options in a list while radios are for selecting one option from many.

Default (stacked)

<label class="checkbox">
  <input type="checkbox" value="">
  Option one is this and that—be sure to include why it's great
</label>

<label class="radio">
  <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
  Option one is this and that—be sure to include why it's great
</label>
<label class="radio">
  <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
  Option two can be something else and selecting it will deselect option one
</label>

Inline checkboxes

Add the .inline class to a series of checkboxes or radios for controls appear on the same line.

<label class="checkbox inline">
  <input type="checkbox" id="inlineCheckbox1" value="option1"> 1
</label>
<label class="checkbox inline">
  <input type="checkbox" id="inlineCheckbox2" value="option2"> 2
</label>
<label class="checkbox inline">
  <input type="checkbox" id="inlineCheckbox3" value="option3"> 3
</label>

Selects

Use the default option or specify a multiple="multiple" to show multiple options at once.

todc-select2 is used for Google-themed rendering of select menus.

<select>
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

<select multiple="multiple">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

<select>
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

<select multiple="multiple">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

Extending form controls

Adding on top of existing browser controls, Bootstrap includes other useful form components.

Prepended and appended inputs

Add text or buttons before or after any text-based input. Do note that select elements are not supported here.

Default options

Wrap an .add-on and an input with one of two classes to prepend or append text to an input.

<div class="input-prepend">
  <span class="add-on">@</span>
  <input class="span2" id="prependedInput" type="text" placeholder="Username">
</div>
<div class="input-append">
  <input class="span2" id="appendedInput" type="text">
  <span class="add-on">.00</span>
</div>

Combined

Use both classes and two instances of .add-on to prepend and append an input.

<div class="input-prepend input-append">
  <span class="add-on">$</span>
  <input class="span2" id="appendedPrependedInput" type="text">
  <span class="add-on">.00</span>
</div>

Buttons instead of text

Instead of a <span> with text, use a .btn to attach a button (or two) to an input.

<div class="input-append">
  <input class="span2" id="appendedInputButton" type="text">
  <button class="btn" type="button">Go!</button>
</div>

<div class="input-append">
  <input class="span2" id="appendedInputButtons" type="text">
  <button class="btn" type="button">Search</button>
  <button class="btn" type="button">Options</button>
</div>

Button dropdowns

<div class="input-append">
  <input class="span2" id="appendedDropdownButton" type="text">
  <div class="btn-group">
    <button class="btn dropdown-toggle" data-toggle="dropdown">
      Action
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      ...
    </ul>
  </div>
</div>

<div class="input-prepend">
  <div class="btn-group">
    <button class="btn dropdown-toggle" data-toggle="dropdown">
      Action
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      ...
    </ul>
  </div>
  <input class="span2" id="prependedDropdownButton" type="text">
</div>

<div class="input-prepend input-append">
  <div class="btn-group">
    <button class="btn dropdown-toggle" data-toggle="dropdown">
      Action
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      ...
    </ul>
  </div>
  <input class="span2" id="appendedPrependedDropdownButton" type="text">
  <div class="btn-group">
    <button class="btn dropdown-toggle" data-toggle="dropdown">
      Action
      <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">
      ...
    </ul>
  </div>
</div>

Segmented dropdown groups

<form>
  <div class="input-prepend">
    <div class="btn-group">...</div>
    <input type="text">
  </div>
  <div class="input-append">
    <input type="text">
    <div class="btn-group">...</div>
  </div>
</form>

Search form

<form class="form-search">
  <div class="input-append">
    <input type="text" class="span2 search-query">
    <button type="submit" class="btn">Search</button>
  </div>
  <div class="input-prepend">
    <button type="submit" class="btn">Search</button>
    <input type="text" class="span2 search-query">
  </div>
</form>

Control sizing

Use relative sizing classes like .input-large or match your inputs to the grid column sizes using .span* classes.

Block level inputs

Make any <input> or <textarea> element behave like a block level element.

<input class="input-block-level" type="text" placeholder=".input-block-level">

Relative sizing

<input class="input-mini" type="text" placeholder=".input-mini">
<input class="input-small" type="text" placeholder=".input-small">
<input class="input-medium" type="text" placeholder=".input-medium">
<input class="input-large" type="text" placeholder=".input-large">
<input class="input-xlarge" type="text" placeholder=".input-xlarge">
<input class="input-xxlarge" type="text" placeholder=".input-xxlarge">

Heads up! In future versions, we'll be altering the use of these relative input classes to match our button sizes. For example, .input-large will increase the padding and font-size of an input.

Grid sizing

Use .span1 to .span12 for inputs that match the same sizes of the grid columns.

<input class="span1" type="text" placeholder=".span1">
<input class="span2" type="text" placeholder=".span2">
<input class="span3" type="text" placeholder=".span3">
<select class="span1">
  ...
</select>
<select class="span2">
  ...
</select>
<select class="span3">
  ...
</select>

For multiple grid inputs per line, use the .controls-row modifier class for proper spacing. It floats the inputs to collapse white-space, sets the proper margins, and clears the float.

<div class="controls">
  <input class="span5" type="text" placeholder=".span5">
</div>
<div class="controls controls-row">
  <input class="span4" type="text" placeholder=".span4">
  <input class="span1" type="text" placeholder=".span1">
</div>
...

Uneditable inputs

Present data in a form that's not editable without using actual form markup.

<span class="input-xlarge uneditable-input">Some value here</span>

Form actions

End a form with a group of actions (buttons). When placed within a .form-actions, the buttons will automatically indent to line up with the form controls.

<div class="form-actions">
  <button type="submit" class="btn btn-primary">Save changes</button>
  <button type="button" class="btn">Cancel</button>
</div>

Help text

Inline and block level support for help text that appears around form controls.

Inline help

<input type="text"><span class="help-inline">Inline help text</span>

Block help

<input type="text"><span class="help-block">A longer block of help text that breaks onto a new line and may extend beyond one line.</span>

Form control states

Provide feedback to users or visitors with basic feedback states on form controls and labels.

Input focus

We remove the default outline styles on some form controls and apply a box-shadow in its place for :focus.

<input class="input-xlarge" id="focusedInput" type="text" value="This is focused...">

Invalid inputs

Style inputs via default browser functionality with :invalid. Specify a type, add the required attribute if the field is not optional, and (if applicable) specify a pattern.

This is not available in versions of Internet Explorer 7-9 due to lack of support for CSS pseudo selectors.

<input class="span3" type="email" required>

Disabled inputs

Add the disabled attribute on an input to prevent user input and trigger a slightly different look.

<input class="input-xlarge" id="disabledInput" type="text" placeholder="Disabled input here..." disabled>

Validation states

Bootstrap includes validation styles for error, warning, info, and success messages. To use, add the appropriate class to the surrounding .control-group.

<div class="control-group warning">
  <label class="control-label" for="inputWarning">Input with warning</label>
  <div class="controls">
    <input type="text" id="inputWarning">
    <span class="help-inline">Something may have gone wrong</span>
  </div>
</div>

<div class="control-group error">
  <label class="control-label" for="inputError">Input with error</label>
  <div class="controls">
    <input type="text" id="inputError">
    <span class="help-inline">Please correct the error</span>
  </div>
</div>

<div class="control-group info">
  <label class="control-label" for="inputInfo">Input with info</label>
  <div class="controls">
    <input type="text" id="inputInfo">
    <span class="help-inline">Username is already taken</span>
  </div>
</div>

<div class="control-group success">
  <label class="control-label" for="inputSuccess">Input with success</label>
  <div class="controls">
    <input type="text" id="inputSuccess">
    <span class="help-inline">Woohoo!</span>
  </div>
</div>

Default buttons

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 for the best rendering.

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 alternative 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
	`btn btn-link`	Deemphasize a button by making it look like a link while maintaining button behavior

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.

Button sizes

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

<p>
  <button class="btn btn-large btn-primary" type="button">Large button</button>
  <button class="btn btn-large" type="button">Large button</button>
</p>
<p>
  <button class="btn btn-primary" type="button">Default button</button>
  <button class="btn" type="button">Default button</button>
</p>
<p>
  <button class="btn btn-small btn-primary" type="button">Small button</button>
  <button class="btn btn-small" type="button">Small button</button>
</p>
<p>
  <button class="btn btn-mini btn-primary" type="button">Mini button</button>
  <button class="btn btn-mini" type="button">Mini button</button>
</p>

Create block level buttons—those that span the full width of a parent— by adding .btn-block.

<button class="btn btn-large btn-block btn-primary" type="button">Block level button</button>
<button class="btn btn-large btn-block" type="button">Block level button</button>

Disabled state

Make buttons look unclickable by fading them back 50%.

Anchor element

Add the .disabled class to <a> buttons.

Primary link Link

<a href="#" class="btn btn-large btn-primary disabled">Primary link</a>
<a href="#" class="btn btn-large disabled">Link</a>

Heads up! We use .disabled as a utility class here, similar to the common .active class, so no prefix is required. Also, this class is only for aesthetic; you must use custom JavaScript to disable links here.

Button element

Add the disabled attribute to <button> buttons.

<button type="button" class="btn btn-large btn-primary disabled" disabled="disabled">Primary button</button>
<button type="button" class="btn btn-large" disabled>Button</button>

One class, multiple tags

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

<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 your context to ensure matching cross-browser rendering. If you have an input, use an <input type="submit"> for your button.

Add classes to an <img> element to easily style images in any project.

A generic square placeholder image with rounded corners

A generic square placeholder image where only the portion within the circle circumscribed about said square is visible

A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera

<img src="..." class="img-rounded">
<img src="..." class="img-circle">
<img src="..." class="img-polaroid">

Heads up! .img-rounded and .img-circle do not work in IE7-8 due to lack of border-radius support.

Icon glyphs

140 icons in sprite form, available in dark gray (default) and white, provided by Glyphicons.

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
icon-hdd
icon-bullhorn
icon-bell
icon-certificate
icon-thumbs-up
icon-thumbs-down
icon-hand-right
icon-hand-left
icon-hand-up
icon-hand-down
icon-circle-arrow-right
icon-circle-arrow-left
icon-circle-arrow-up
icon-circle-arrow-down
icon-globe
icon-wrench
icon-tasks
icon-filter
icon-briefcase
icon-fullscreen

Glyphicons attribution

Glyphicons Halflings are normally not available for free, but an arrangement between Bootstrap and the Glyphicons creators have made this possible at no cost to you as developers. As a thank you, we ask you to include an optional link back to Glyphicons whenever practical.

How to use

All icons require an <i> tag with a unique class, prefixed with icon-. 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. We will specifically enforce this class on hover and active states for nav and dropdown links.

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

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.

Icon examples

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

Buttons

Button group in a button toolbar

<div class="btn-toolbar">
  <div class="btn-group">
    <a class="btn" href="#"><i class="icon-align-left"></i></a>
    <a class="btn" href="#"><i class="icon-align-center"></i></a>
    <a class="btn" href="#"><i class="icon-align-right"></i></a>
    <a class="btn" href="#"><i class="icon-align-justify"></i></a>
  </div>
</div>

Dropdown in a button group

User

<div class="btn-group">
  <a class="btn btn-primary" href="#"><i class="icon-user icon-white"></i> User</a>
  <a class="btn btn-primary dropdown-toggle" data-toggle="dropdown" href="#"><span class="caret"></span></a>
  <ul class="dropdown-menu">
    <li><a href="#"><i class="icon-pencil"></i> Edit</a></li>
    <li><a href="#"><i class="icon-trash"></i> Delete</a></li>
    <li><a href="#"><i class="icon-ban-circle"></i> Ban</a></li>
    <li class="divider"></li>
    <li><a href="#"><i class="i"></i> Make admin</a></li>
  </ul>
</div>

Button sizes

Star Star Star

<a class="btn btn-large" href="#"><i class="icon-star"></i> Star</a>
<a class="btn btn-small" href="#"><i class="icon-star"></i> Star</a>
<a class="btn btn-mini" href="#"><i class="icon-star"></i> Star</a>

Navigation

<ul class="nav nav-list">
  <li class="active"><a href="#"><i class="icon-home icon-white"></i> Home</a></li>
  <li><a href="#"><i class="icon-book"></i> Library</a></li>
  <li><a href="#"><i class="icon-pencil"></i> Applications</a></li>
  <li><a href="#"><i class="i"></i> Misc</a></li>
</ul>

Form fields

<div class="control-group">
  <label class="control-label" for="inputIcon">Email address</label>
  <div class="controls">
    <div class="input-prepend">
      <span class="add-on"><i class="icon-envelope"></i></span>
      <input class="span2" id="inputIcon" type="text">
    </div>
  </div>
</div>

排版

Headings

h1. Heading 1

h2. Heading 2

h3. Heading 3

h4. Heading 4

h5. Heading 5

h6. Heading 6

Body copy

Lead body copy

Built with Less

Emphasis

<small>

Bold

Italics

Alignment classes

Emphasis classes

Abbreviations

<abbr>

<abbr class="initialism">

Addresses

<address>

Blockquotes

Default blockquote

Blockquote options

Naming a source

Alternate displays

Lists

Unordered

Ordered

Unstyled

Inline

Description

Horizontal description

Code

Inline

Basic block

Tables 表格

Default styles 默认样式

Optional classes

.table-striped

.table-bordered

.table-hover

.table-condensed

Optional row classes

Supported table markup

Forms 表单

Default styles 默认样式

Optional layouts

Search form

Inline form

Horizontal form

Supported form controls

Inputs

Textarea

Checkboxes and radios

Default (stacked)

Inline checkboxes

Selects

Extending form controls

Prepended and appended inputs

Default options

Combined

Buttons instead of text

Button dropdowns

Segmented dropdown groups

Search form

Control sizing

Block level inputs

Relative sizing

Grid sizing

Uneditable inputs

Form actions

Help text

Inline help

Block help

Form control states

Input focus

Invalid inputs

Disabled inputs

`<small>`

`<abbr>`

`<abbr class="initialism">`

`<address>`

`.table-striped`

`.table-bordered`

`.table-hover`

`.table-condensed`