forms.html

<div class="bs-docs-section">
  <h1 id="forms" class="page-header">Forms</h1>

  <h2 id="forms-example">Basic example</h2>
  <p>Individual form controls automatically receive some global styling. All textual <code>&lt;input&gt;</code>, <code>&lt;textarea&gt;</code>, and <code>&lt;select&gt;</code> elements with <code>.form-control</code> are set to <code>width: 100%;</code> by default. Wrap labels and controls in <code>.form-group</code> for optimum spacing.</p>
  <div class="bs-example" data-example-id="basic-forms">
    <form>
      <div class="form-group">
        <label for="exampleInputEmail1">Email address</label>
        <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
      </div>
      <div class="form-group">
        <label for="exampleInputPassword1">Password</label>
        <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
      </div>
      <div class="form-group">
        <label for="exampleInputFile">File input</label>
        <input type="file" id="exampleInputFile">
        <p class="help-block">Example block-level help text here.</p>
      </div>
      <div class="checkbox">
        <label>
          <input type="checkbox"> Check me out
        </label>
      </div>
      <button type="submit" class="btn btn-default">Submit</button>
    </form>
  </div><!-- /example -->
{% highlight html %}
<form>
  <div class="form-group">
    <label for="exampleInputEmail1">Email address</label>
    <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
  </div>
  <div class="form-group">
    <label for="exampleInputPassword1">Password</label>
    <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
  </div>
  <div class="form-group">
    <label for="exampleInputFile">File input</label>
    <input type="file" id="exampleInputFile">
    <p class="help-block">Example block-level help text here.</p>
  </div>
  <div class="checkbox">
    <label>
      <input type="checkbox"> Check me out
    </label>
  </div>
  <button type="submit" class="btn btn-default">Submit</button>
</form>
{% endhighlight %}
  <div class="bs-callout bs-callout-warning" id="callout-formgroup-inputgroup">
    <h4>Don't mix form groups with input groups</h4>
    <p>Do not mix form groups directly with <a href="/components/#input-groups">input groups</a>. Instead, nest the input group inside of the form group.</p>
  </div>


  <h2 id="forms-inline">Inline form</h2>
  <p>Add <code>.form-inline</code> to your <code>&lt;form&gt;</code> for left-aligned and inline-block controls. <strong>This only applies to forms within viewports that are at least 768px wide.</strong></p>
  <div class="bs-callout bs-callout-danger" id="callout-inline-form-width">
    <h4>Requires custom widths</h4>
    <p>Inputs and selects have <code>width: 100%;</code> applied by default in Bootstrap. Within inline forms, we reset that to <code>width: auto;</code> so multiple controls can reside on the same line. Depending on your layout, additional custom widths may be required.</p>
  </div>
  <div class="bs-callout bs-callout-warning" id="callout-inline-form-labels">
    <h4>Always add labels</h4>
    <p>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 <code>.sr-only</code> class. There are further alternative methods of providing a label for assistive technologies, such as the <code>aria-label</code>, <code>aria-labelledby</code> or <code>title</code> attribute. If none of these is present, screen readers may resort to using the <code>placeholder</code> attribute, if present, but note that use of <code>placeholder</code> as a replacement for other labelling methods is not advised.</p>
  </div>
  <div class="bs-example" data-example-id="simple-form-inline">
    <form class="form-inline">
      <div class="form-group">
        <label class="sr-only" for="exampleInputEmail2">Email address</label>
        <input type="email" class="form-control" id="exampleInputEmail2" placeholder="Enter email">
      </div>
      <div class="form-group">
        <label class="sr-only" for="exampleInputPassword2">Password</label>
        <input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password">
      </div>
      <div class="checkbox">
        <label>
          <input type="checkbox"> Remember me
        </label>
      </div>
      <button type="submit" class="btn btn-default">Sign in</button>
    </form>
  </div><!-- /example -->
{% highlight html %}
<form class="form-inline">
  <div class="form-group">
    <label class="sr-only" for="exampleInputEmail2">Email address</label>
    <input type="email" class="form-control" id="exampleInputEmail2" placeholder="Enter email">
  </div>
  <div class="form-group">
    <label class="sr-only" for="exampleInputPassword2">Password</label>
    <input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password">
  </div>
  <div class="checkbox">
    <label>
      <input type="checkbox"> Remember me
    </label>
  </div>
  <button type="submit" class="btn btn-default">Sign in</button>
</form>
{% endhighlight %}

  <div class="bs-example" data-example-id="form-inline-with-input-group">
    <form class="form-inline">
      <div class="form-group">
        <label class="sr-only" for="exampleInputAmount">Amount (in dollars)</label>
        <div class="input-group">
          <div class="input-group-addon">$</div>
          <input type="text" class="form-control" id="exampleInputAmount" placeholder="Amount">
          <div class="input-group-addon">.00</div>
        </div>
      </div>
      <button type="submit" class="btn btn-primary">Transfer cash</button>
    </form>
  </div><!-- /example -->
{% highlight html %}
<form class="form-inline">
  <div class="form-group">
    <label class="sr-only" for="exampleInputAmount">Amount (in dollars)</label>
    <div class="input-group">
      <div class="input-group-addon">$</div>
      <input type="text" class="form-control" id="exampleInputAmount" placeholder="Amount">
      <div class="input-group-addon">.00</div>
    </div>
  </div>
  <button type="submit" class="btn btn-primary">Transfer cash</button>
</form>
{% endhighlight %}

  <h2 id="forms-horizontal">Horizontal form</h2>
  <p>Use Bootstrap's predefined grid classes to align labels and groups of form controls in a horizontal layout by adding <code>.form-horizontal</code> to the form. Doing so changes <code>.form-group</code>s to behave as grid rows, so no need for <code>.row</code>.</p>
  <div class="bs-example" data-example-id="simple-horizontal-form">
    <form class="form-horizontal">
      <div class="form-group">
        <label for="inputEmail3" class="col-sm-2 control-label">Email</label>
        <div class="col-sm-10">
          <input type="email" class="form-control" id="inputEmail3" placeholder="Email">
        </div>
      </div>
      <div class="form-group">
        <label for="inputPassword3" class="col-sm-2 control-label">Password</label>
        <div class="col-sm-10">
          <input type="password" class="form-control" id="inputPassword3" placeholder="Password">
        </div>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <div class="checkbox">
            <label>
              <input type="checkbox"> Remember me
            </label>
          </div>
        </div>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <button type="submit" class="btn btn-default">Sign in</button>
        </div>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<form class="form-horizontal">
  <div class="form-group">
    <label for="inputEmail3" class="col-sm-2 control-label">Email</label>
    <div class="col-sm-10">
      <input type="email" class="form-control" id="inputEmail3" placeholder="Email">
    </div>
  </div>
  <div class="form-group">
    <label for="inputPassword3" class="col-sm-2 control-label">Password</label>
    <div class="col-sm-10">
      <input type="password" class="form-control" id="inputPassword3" placeholder="Password">
    </div>
  </div>
  <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <div class="checkbox">
        <label>
          <input type="checkbox"> Remember me
        </label>
      </div>
    </div>
  </div>
  <div class="form-group">
    <div class="col-sm-offset-2 col-sm-10">
      <button type="submit" class="btn btn-default">Sign in</button>
    </div>
  </div>
</form>
{% endhighlight %}


  <h2 id="forms-controls">Supported controls</h2>
  <p>Examples of standard form controls supported in an example form layout.</p>

  <h3>Inputs</h3>
  <p>Most common form control, text-based input fields. Includes support for all HTML5 types: <code>text</code>, <code>password</code>, <code>datetime</code>, <code>datetime-local</code>, <code>date</code>, <code>month</code>, <code>time</code>, <code>week</code>, <code>number</code>, <code>email</code>, <code>url</code>, <code>search</code>, <code>tel</code>, and <code>color</code>.</p>
  <div class="bs-callout bs-callout-danger" id="callout-input-needs-type">
    <h4>Type declaration required</h4>
    <p>Inputs will only be fully styled if their <code>type</code> is properly declared.</p>
  </div>
  <div class="bs-example" data-example-id="text-form-control">
    <form>
      <input type="text" class="form-control" placeholder="Text input">
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<input type="text" class="form-control" placeholder="Text input">
{% endhighlight %}
  <div class="bs-callout bs-callout-info" id="callout-xref-input-group">
    <h4>Input groups</h4>
    <p>To add integrated text or buttons before and/or after any text-based <code>&lt;input&gt;</code>, <a href="../components/#input-groups">check out the input group component</a>.</p>
  </div>

  <h3>Textarea</h3>
  <p>Form control which supports multiple lines of text. Change <code>rows</code> attribute as necessary.</p>
  <div class="bs-example" data-example-id="textarea-form-control">
    <form>
      <textarea class="form-control" rows="3" placeholder="Textarea"></textarea>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<textarea class="form-control" rows="3"></textarea>
{% endhighlight %}

  <h3>Checkboxes and radios</h3>
  <p>Checkboxes are for selecting one or several options in a list, while radios are for selecting one option from many.</p>
  <p>A checkbox or radio with the <code>disabled</code> attribute will be styled appropriately. To have the <code>&lt;label&gt;</code> for the checkbox or radio also display a "not-allowed" cursor when the user hovers over the label, add the <code>.disabled</code> class to your <code>.radio</code>, <code>.radio-inline</code>, <code>.checkbox</code>, <code>.checkbox-inline</code>, or <code>&lt;fieldset&gt;</code>.</p>
  <h4>Default (stacked)</h4>
  <div class="bs-example" data-example-id="block-checkboxes-radios">
    <form>
      <div class="checkbox">
        <label>
          <input type="checkbox" value="">
          Option one is this and that&mdash;be sure to include why it's great
        </label>
      </div>
      <div class="checkbox disabled">
        <label>
          <input type="checkbox" value="" disabled>
          Option two is disabled
        </label>
      </div>
      <br>
      <div class="radio">
        <label>
          <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
          Option one is this and that&mdash;be sure to include why it's great
        </label>
      </div>
      <div class="radio">
        <label>
          <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
          Option two can be something else and selecting it will deselect option one
        </label>
      </div>
      <div class="radio disabled">
        <label>
          <input type="radio" name="optionsRadios" id="optionsRadios3" value="option3" disabled>
          Option three is disabled
        </label>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<div class="checkbox">
  <label>
    <input type="checkbox" value="">
    Option one is this and that&mdash;be sure to include why it's great
  </label>
</div>
<div class="checkbox disabled">
  <label>
    <input type="checkbox" value="" disabled>
    Option two is disabled
  </label>
</div>

<div class="radio">
  <label>
    <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
    Option one is this and that&mdash;be sure to include why it's great
  </label>
</div>
<div class="radio">
  <label>
    <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
    Option two can be something else and selecting it will deselect option one
  </label>
</div>
<div class="radio disabled">
  <label>
    <input type="radio" name="optionsRadios" id="optionsRadios3" value="option3" disabled>
    Option three is disabled
  </label>
</div>
{% endhighlight %}

  <h4>Inline checkboxes and radios</h4>
  <p>Use the <code>.checkbox-inline</code> or <code>.radio-inline</code> classes on a series of checkboxes or radios for controls that appear on the same line.</p>
  <div class="bs-example" data-example-id="inline-checkboxes-radios">
    <form>
      <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>
    </form>
    <br>
    <form>
      <label class="radio-inline">
        <input type="radio" name="inlineRadioOptions" id="inlineRadio1" value="option1"> 1
      </label>
      <label class="radio-inline">
        <input type="radio" name="inlineRadioOptions" id="inlineRadio2" value="option2"> 2
      </label>
      <label class="radio-inline">
        <input type="radio" name="inlineRadioOptions" id="inlineRadio3" value="option3"> 3
      </label>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<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>

<label class="radio-inline">
  <input type="radio" name="inlineRadioOptions" id="inlineRadio1" value="option1"> 1
</label>
<label class="radio-inline">
  <input type="radio" name="inlineRadioOptions" id="inlineRadio2" value="option2"> 2
</label>
<label class="radio-inline">
  <input type="radio" name="inlineRadioOptions" id="inlineRadio3" value="option3"> 3
</label>
{% endhighlight %}

  <h4>Checkboxes and radios without label text</h4>
  <p>Should you have no text within the <code>&lt;label&gt;</code>, the input is positioned as you'd expect. <strong>Currently only works on non-inline checkboxes and radios.</strong> Remember to still provide some form of label for assistive technologies (for instance, using <code>aria-label</code>).</p>
  <div class="bs-example" data-example-id="checkboxes-radios-without-labels">
    <form>
      <div class="checkbox">
        <label>
          <input type="checkbox" id="blankCheckbox" value="option1" aria-label="Checkbox without label text">
        </label>
      </div>
      <div class="radio">
        <label>
          <input type="radio" name="blankRadio" id="blankRadio1" value="option1" aria-label="Radio button without label text">
        </label>
      </div>
    </form>
  </div>
{% highlight html %}
<div class="checkbox">
  <label>
    <input type="checkbox" id="blankCheckbox" value="option1" aria-label="...">
  </label>
</div>
<div class="radio">
  <label>
    <input type="radio" name="blankRadio" id="blankRadio1" value="option1" aria-label="...">
  </label>
</div>
{% endhighlight %}

  <h3>Selects</h3>
  <p>Use the default option, or add <code>multiple</code> to show multiple options at once.</p>
  <div class="bs-example" data-example-ids="select-form-control">
    <form>
      <select class="form-control">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select>
      <br>
      <select multiple class="form-control">
        <option>1</option>
        <option>2</option>
        <option>3</option>
        <option>4</option>
        <option>5</option>
      </select>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<select class="form-control">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

<select multiple class="form-control">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>
{% endhighlight %}


  <h2 id="forms-controls-static">Static control</h2>
  <p>When you need to place plain text next to a form label within a form, use the <code>.form-control-static</code> class on a <code>&lt;p&gt;</code>.</p>
  <div class="bs-example" data-example-id="horizontal-static-form-control">
    <form class="form-horizontal">
      <div class="form-group">
        <label class="col-sm-2 control-label">Email</label>
        <div class="col-sm-10">
          <p class="form-control-static">email@example.com</p>
        </div>
      </div>
      <div class="form-group">
        <label for="inputPassword" class="col-sm-2 control-label">Password</label>
        <div class="col-sm-10">
          <input type="password" class="form-control" id="inputPassword" placeholder="Password">
        </div>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<form class="form-horizontal">
  <div class="form-group">
    <label class="col-sm-2 control-label">Email</label>
    <div class="col-sm-10">
      <p class="form-control-static">email@example.com</p>
    </div>
  </div>
  <div class="form-group">
    <label for="inputPassword" class="col-sm-2 control-label">Password</label>
    <div class="col-sm-10">
      <input type="password" class="form-control" id="inputPassword" placeholder="Password">
    </div>
  </div>
</form>
{% endhighlight %}
  <div class="bs-example" data-example-id="inline-static-form-control">
    <form class="form-inline">
      <div class="form-group">
        <label class="sr-only">Email</label>
        <p class="form-control-static">email@example.com</p>
      </div>
      <div class="form-group">
        <label for="inputPassword2" class="sr-only">Password</label>
        <input type="password" class="form-control" id="inputPassword2" placeholder="Password">
      </div>
      <button type="submit" class="btn btn-default">Confirm identity</button>
    </form>
  </div>
{% highlight html %}
<form class="form-inline">
  <div class="form-group">
    <label class="sr-only">Email</label>
    <p class="form-control-static">email@example.com</p>
  </div>
  <div class="form-group">
    <label for="inputPassword2" class="sr-only">Password</label>
    <input type="password" class="form-control" id="inputPassword2" placeholder="Password">
  </div>
  <button type="submit" class="btn btn-default">Confirm identity</button>
</form>
{% endhighlight %}

  <h2 id="forms-control-focus">Focus state</h2>
  <p>We remove the default <code>outline</code> styles on some form controls and apply a <code>box-shadow</code> in its place for <code>:focus</code>.</p>
  <div class="bs-example">
    <form>
      <input class="form-control" id="focusedInput" type="text" value="Demonstrative focus state">
    </form>
  </div>
  <div class="bs-callout bs-callout-info" id="callout-focus-demo">
    <h4>Demo <code>:focus</code> state</h4>
    <p>The above example input uses custom styles in our documentation to demonstrate the <code>:focus</code> state on a <code>.form-control</code>.</p>
  </div>


  <h2 id="forms-control-disabled">Disabled state</h2>
  <p>Add the <code>disabled</code> boolean attribute on an input to prevent user input and trigger a slightly different look.</p>
  <div class="bs-example" data-example-id="text-form-control-disabled">
    <form>
      <input class="form-control" id="disabledInput" type="text" placeholder="Disabled input here…" disabled>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<input class="form-control" id="disabledInput" type="text" placeholder="Disabled input here..." disabled>
{% endhighlight %}

  <h3 id="forms-disabled-fieldsets">Disabled fieldsets</h3>
  <p>Add the <code>disabled</code> attribute to a <code>&lt;fieldset&gt;</code> to disable all the controls within the <code>&lt;fieldset&gt;</code> at once.</p>

  <div class="bs-callout bs-callout-warning" id="callout-fieldset-disabled-pointer-events">
    <h4>Caveat about link functionality of <code>&lt;a&gt;</code></h4>
    <p>By default, browsers will treat all native form controls (<code>&lt;input&gt;</code>, <code>&lt;select&gt;</code> and <code>&lt;button&gt;</code> elements) inside a <code>&lt;fieldset disabled&gt;</code> as disabled, preventing both keyboard and mouse interactions on them. However, if your form also includes <code>&lt;a ... class="btn btn-*"&gt;</code> elements, these will only be given a style of <code>pointer-events: none</code>. As noted in the section about <a href="#buttons-disabled">disabled state for buttons</a> (and specifically in the sub-section for anchor elements), this CSS property is not yet standardized and isn't fully supported in Opera 18 and below, or in Internet Explorer 11, and won't prevent keyboard users from being able to focus or activate these links. So to be safe, use custom JavaScript to disable such links.</p>
  </div>

  <div class="bs-callout bs-callout-danger" id="callout-fieldset-disabled-ie">
    <h4>Cross-browser compatibility</h4>
    <p>While Bootstrap will apply these styles in all browsers, Internet Explorer 11 and below don't fully support the <code>disabled</code> attribute on a <code>&lt;fieldset&gt;</code>. Use custom JavaScript to disable the fieldset in these browsers.</p>
  </div>

  <div class="bs-example" data-example-id="disabled-fieldset">
    <form>
      <fieldset disabled>
        <div class="form-group">
          <label for="disabledTextInput">Disabled input</label>
          <input type="text" id="disabledTextInput" class="form-control" placeholder="Disabled input">
        </div>
        <div class="form-group">
          <label for="disabledSelect">Disabled select menu</label>
          <select id="disabledSelect" class="form-control">
            <option>Disabled select</option>
          </select>
        </div>
        <div class="checkbox">
          <label>
            <input type="checkbox"> Can't check this
          </label>
        </div>
        <button type="submit" class="btn btn-primary">Submit</button>
      </fieldset>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<form>
  <fieldset disabled>
    <div class="form-group">
      <label for="disabledTextInput">Disabled input</label>
      <input type="text" id="disabledTextInput" class="form-control" placeholder="Disabled input">
    </div>
    <div class="form-group">
      <label for="disabledSelect">Disabled select menu</label>
      <select id="disabledSelect" class="form-control">
        <option>Disabled select</option>
      </select>
    </div>
    <div class="checkbox">
      <label>
        <input type="checkbox"> Can't check this
      </label>
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
  </fieldset>
</form>
{% endhighlight %}


  <h2 id="forms-control-readonly">Readonly state</h2>
  <p>Add the <code>readonly</code> boolean attribute on an input to prevent user input and style the input as disabled.</p>
  <div class="bs-example" data-example-id="readonly-text-form-control">
    <form>
      <input class="form-control" type="text" placeholder="Readonly input here…" readonly>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<input class="form-control" type="text" placeholder="Readonly input here…" readonly>
{% endhighlight %}


  <h2 id="forms-control-validation">Validation states</h2>
  <p>Bootstrap includes validation styles for error, warning, and success states on form controls. To use, add <code>.has-warning</code>, <code>.has-error</code>, or <code>.has-success</code> to the parent element. Any <code>.control-label</code>, <code>.form-control</code>, and <code>.help-block</code> within that element will receive the validation styles.</p>

  <div class="bs-callout bs-callout-warning" id="callout-form-validation-state-accessibility">
    <h4>Conveying validation state to assistive technologies</h4>
    <p>Using these validation styles to denote the state of a form control only provides a visual indication, which will not be conveyed to users of assistive technologies – such as screen readers.</p>
    <p>Ensure that an alternative indication of state is also provided. For instance, you can include a hint about state in the form control's <code>&lt;label&gt;</code> text itself (as is the case in the following code example), or associate an additional element with textual information about the validation state with the form control using <code>aria-describedby</code> (see the example in the following section). In the case of an error, you could also use the <code>aria-invalid="true"</code> attribute on the form control.</p>
  </div>

  <div class="bs-example" data-example-id="form-validation-states">
    <form>
      <div class="form-group has-success">
        <label class="control-label" for="inputSuccess1">Input with success</label>
        <input type="text" class="form-control" id="inputSuccess1">
      </div>
      <div class="form-group has-warning">
        <label class="control-label" for="inputWarning1">Input with warning</label>
        <input type="text" class="form-control" id="inputWarning1">
      </div>
      <div class="form-group has-error">
        <label class="control-label" for="inputError1">Input with error</label>
        <input type="text" class="form-control" id="inputError1">
      </div>
      <div class="has-success">
        <div class="checkbox">
          <label>
            <input type="checkbox" id="checkboxSuccess" value="option1">
            Checkbox with success
          </label>
        </div>
      </div>
      <div class="has-warning">
        <div class="checkbox">
          <label>
            <input type="checkbox" id="checkboxWarning" value="option1">
            Checkbox with warning
          </label>
        </div>
      </div>
      <div class="has-error">
        <div class="checkbox">
          <label>
            <input type="checkbox" id="checkboxError" value="option1">
            Checkbox with error
          </label>
        </div>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<div class="form-group has-success">
  <label class="control-label" for="inputSuccess1">Input with success</label>
  <input type="text" class="form-control" id="inputSuccess1">
</div>
<div class="form-group has-warning">
  <label class="control-label" for="inputWarning1">Input with warning</label>
  <input type="text" class="form-control" id="inputWarning1">
</div>
<div class="form-group has-error">
  <label class="control-label" for="inputError1">Input with error</label>
  <input type="text" class="form-control" id="inputError1">
</div>
<div class="has-success">
  <div class="checkbox">
    <label>
      <input type="checkbox" id="checkboxSuccess" value="option1">
      Checkbox with success
    </label>
  </div>
</div>
<div class="has-warning">
  <div class="checkbox">
    <label>
      <input type="checkbox" id="checkboxWarning" value="option1">
      Checkbox with warning
    </label>
  </div>
</div>
<div class="has-error">
  <div class="checkbox">
    <label>
      <input type="checkbox" id="checkboxError" value="option1">
      Checkbox with error
    </label>
  </div>
</div>
{% endhighlight %}

  <h3>With optional icons</h3>
  <p>You can also add optional feedback icons with the addition of <code>.has-feedback</code> and the right icon.</p>
  <p><strong class="text-danger">Feedback icons only work with textual <code>&lt;input class="form-control"&gt;</code> elements.</strong></p>
  <div class="bs-callout bs-callout-warning" id="callout-has-feedback-icon-positioning">
    <h4>Icons, labels, and input groups</h4>
    <p>Manual positioning of feedback icons is required for inputs without a label and for <a href="../components#input-groups">input groups</a> with an add-on on the right. You are strongly encouraged to provide labels for all inputs for accessibility reasons. If you wish to prevent labels from being displayed, hide them with the <code>.sr-only</code> class. If you must do without labels, adjust the <code>top</code> value of the feedback icon. For input groups, adjust the <code>right</code> value to an appropriate pixel value depending on the width of your addon.</p>
  </div>
  <div class="bs-callout bs-callout-warning" id="callout-has-feedback-icon-accessibility">
    <h4>Conveying the icon's meaning to assistive technologies</h4>
    <p>To ensure that assistive technologies – such as screen readers – correctly convey the meaning of an icon, additional hidden text should be included with the <code>.sr-only</code> class and explicitly associated with the form control it relates to using <code>aria-describedby</code>. Alternatively, ensure that the meaning (for instance, the fact that there is a warning for a particular text entry field) is conveyed in some other form, such as changing the text of the actual <code>&lt;label&gt;</code> associated with the form control.</p>
    <p>Although the following examples already mention the validation state of their respective form controls in the <code>&lt;label&gt;</code> text itself, the above technique (using <code>.sr-only</code> text and <code>aria-describedby</code>) has been included for illustrative purposes.</p>
  </div>
  <div class="bs-example" data-example-id="form-validation-states-with-icons">
    <form>
      <div class="form-group has-success has-feedback">
        <label class="control-label" for="inputSuccess2">Input with success</label>
        <input type="text" class="form-control" id="inputSuccess2" aria-describedby="inputSuccess2Status">
        <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
        <span id="inputSuccess2Status" class="sr-only">(success)</span>
      </div>
      <div class="form-group has-warning has-feedback">
        <label class="control-label" for="inputWarning2">Input with warning</label>
        <input type="text" class="form-control" id="inputWarning2" aria-describedby="inputWarning2Status">
        <span class="glyphicon glyphicon-warning-sign form-control-feedback" aria-hidden="true"></span>
        <span id="inputWarning2Status" class="sr-only">(warning)</span>
      </div>
      <div class="form-group has-error has-feedback">
        <label class="control-label" for="inputError2">Input with error</label>
        <input type="text" class="form-control" id="inputError2" aria-describedby="inputError2Status">
        <span class="glyphicon glyphicon-remove form-control-feedback" aria-hidden="true"></span>
        <span id="inputError2Status" class="sr-only">(error)</span>
      </div>
    </form>
  </div>
{% highlight html %}
<div class="form-group has-success has-feedback">
  <label class="control-label" for="inputSuccess2">Input with success</label>
  <input type="text" class="form-control" id="inputSuccess2" aria-describedby="inputSuccess2Status">
  <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
  <span id="inputSuccess2Status" class="sr-only">(success)</span>
</div>
<div class="form-group has-warning has-feedback">
  <label class="control-label" for="inputWarning2">Input with warning</label>
  <input type="text" class="form-control" id="inputWarning2" aria-describedby="inputWarning2Status">
  <span class="glyphicon glyphicon-warning-sign form-control-feedback" aria-hidden="true"></span>
  <span id="inputWarning2Status" class="sr-only">(warning)</span>
</div>
<div class="form-group has-error has-feedback">
  <label class="control-label" for="inputError2">Input with error</label>
  <input type="text" class="form-control" id="inputError2" aria-describedby="inputError2Status">
  <span class="glyphicon glyphicon-remove form-control-feedback" aria-hidden="true"></span>
  <span id="inputError2Status" class="sr-only">(error)</span>
</div>
{% endhighlight %}

  <h4>Optional icons in horizontal and inline forms</h4>
  <div class="bs-example" data-example-id="horizontal-form-validation-state-with-icon">
    <form class="form-horizontal">
      <div class="form-group has-success has-feedback">
        <label class="control-label col-sm-3" for="inputSuccess3">Input with success</label>
        <div class="col-sm-9">
          <input type="text" class="form-control" id="inputSuccess3" aria-describedby="inputSuccess3Status">
          <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
          <span id="inputSuccess3Status" class="sr-only">(success)</span>
        </div>
      </div>
    </form>
  </div>
{% highlight html %}
<form class="form-horizontal">
  <div class="form-group has-success has-feedback">
    <label class="control-label col-sm-3" for="inputSuccess3">Input with success</label>
    <div class="col-sm-9">
      <input type="text" class="form-control" id="inputSuccess3" aria-describedby="inputSuccess3Status">
      <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
      <span id="inputSuccess3Status" class="sr-only">(success)</span>
    </div>
  </div>
</form>
{% endhighlight %}

  <div class="bs-example" data-example-id="inline-form-validation-state-with-icon">
    <form class="form-inline">
      <div class="form-group has-success has-feedback">
        <label class="control-label" for="inputSuccess4">Input with success</label>
        <input type="text" class="form-control" id="inputSuccess4" aria-describedby="inputSuccess4Status">
        <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
        <span id="inputSuccess4Status" class="sr-only">(success)</span>
      </div>
    </form>
  </div>
{% highlight html %}
<form class="form-inline">
  <div class="form-group has-success has-feedback">
    <label class="control-label" for="inputSuccess4">Input with success</label>
    <input type="text" class="form-control" id="inputSuccess4" aria-describedby="inputSuccess4Status">
    <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
    <span id="inputSuccess4Status" class="sr-only">(success)</span>
  </div>
</form>
{% endhighlight %}

  <h4>Optional icons with hidden <code>.sr-only</code> labels</h4>
  <p>If you use the <code>.sr-only</code> class to hide a form control's <code>&lt;label&gt;</code> (rather than using other labelling options, such as the <code>aria-label</code> attribute), Bootstrap will automatically adjust the position of the icon once it's been added.</p>
  <div class="bs-example" data-example-id="form-validation-state-with-icon-without-label">
    <div class="form-group has-success has-feedback">
      <label class="control-label sr-only" for="inputSuccess5">Hidden label</label>
      <input type="text" class="form-control" id="inputSuccess5" aria-describedby="inputSuccess5Status">
      <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
      <span id="inputSuccess5Status" class="sr-only">(success)</span>
    </div>
  </div>
{% highlight html %}
<div class="form-group has-success has-feedback">
  <label class="control-label sr-only" for="inputSuccess5">Hidden label</label>
  <input type="text" class="form-control" id="inputSuccess5" aria-describedby="inputSuccess5Status">
  <span class="glyphicon glyphicon-ok form-control-feedback" aria-hidden="true"></span>
  <span id="inputSuccess5Status" class="sr-only">(success)</span>
</div>
{% endhighlight %}


  <h2 id="forms-control-sizes">Control sizing</h2>
  <p>Set heights using classes like <code>.input-lg</code>, and set widths using grid column classes like <code>.col-lg-*</code>.</p>

  <h3>Height sizing</h3>
  <p>Create taller or shorter form controls that match button sizes.</p>
  <div class="bs-example bs-example-control-sizing" data-example-id="form-control-height-sizes">
    <form>
      <div class="controls">
        <input class="form-control input-lg" type="text" placeholder=".input-lg">
        <input type="text" class="form-control" placeholder="Default input">
        <input class="form-control input-sm" type="text" placeholder=".input-sm">

        <select class="form-control input-lg">
          <option value="">.input-lg</option>
        </select>
        <select class="form-control">
          <option value="">Default select</option>
        </select>
        <select class="form-control input-sm">
          <option value="">.input-sm</option>
        </select>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<input class="form-control input-lg" type="text" placeholder=".input-lg">
<input class="form-control" type="text" placeholder="Default input">
<input class="form-control input-sm" type="text" placeholder=".input-sm">

<select class="form-control input-lg">...</select>
<select class="form-control">...</select>
<select class="form-control input-sm">...</select>
{% endhighlight %}

  <h3>Horizontal form group sizes</h3>
  <p>Quickly size labels and form controls within <code>.form-horizontal</code> by adding <code>.form-group-lg</code> or <code>.form-group-sm</code>.</p>
  <div class="bs-example" data-example-id="form-group-height-sizes">
    <form class="form-horizontal">
      <div class="form-group form-group-lg">
        <label class="col-sm-2 control-label" for="formGroupInputLarge">Large label</label>
        <div class="col-sm-10">
          <input class="form-control" type="text" id="formGroupInputLarge" placeholder="Large input">
        </div>
      </div>
      <div class="form-group form-group-sm">
        <label class="col-sm-2 control-label" for="formGroupInputSmall">Small label</label>
        <div class="col-sm-10">
          <input class="form-control" type="text" id="formGroupInputSmall" placeholder="Small input">
        </div>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<form class="form-horizontal">
  <div class="form-group form-group-lg">
    <label class="col-sm-2 control-label" for="formGroupInputLarge">Large label</label>
    <div class="col-sm-10">
      <input class="form-control" type="text" id="formGroupInputLarge" placeholder="Large input">
    </div>
  </div>
  <div class="form-group form-group-sm">
    <label class="col-sm-2 control-label" for="formGroupInputSmall">Small label</label>
    <div class="col-sm-10">
      <input class="form-control" type="text" id="formGroupInputSmall" placeholder="Small input">
    </div>
  </div>
</form>
{% endhighlight %}


  <h3>Column sizing</h3>
  <p>Wrap inputs in grid columns, or any custom parent element, to easily enforce desired widths.</p>
  <div class="bs-example" data-example-id="form-control-column-sizing">
    <form>
      <div class="row">
        <div class="col-xs-2">
          <input type="text" class="form-control" placeholder=".col-xs-2">
        </div>
        <div class="col-xs-3">
          <input type="text" class="form-control" placeholder=".col-xs-3">
        </div>
        <div class="col-xs-4">
          <input type="text" class="form-control" placeholder=".col-xs-4">
        </div>
      </div>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<div class="row">
  <div class="col-xs-2">
    <input type="text" class="form-control" placeholder=".col-xs-2">
  </div>
  <div class="col-xs-3">
    <input type="text" class="form-control" placeholder=".col-xs-3">
  </div>
  <div class="col-xs-4">
    <input type="text" class="form-control" placeholder=".col-xs-4">
  </div>
</div>
{% endhighlight %}

  <h2 id="forms-help-text">Help text</h2>
  <p>Block level help text for form controls.</p>
  <div class="bs-callout bs-callout-info" id="callout-help-text-accessibility">
    <h4>Associating help text with form controls</h4>
    <p>Help text should be explicitly associated with the form control it relates to using the <code>aria-describedby</code> attribute. This will ensure that assistive technologies – such as screen readers – will announce this help text when the user focuses or enters the control.</p>
  </div>
  <div class="bs-example" data-example-id="simple-help-text">
    <form>
      <div class="form-group">
        <label for="inputHelpBlock">Input with help text</label>
        <input type="text" id="inputHelpBlock" class="form-control" aria-describedby="helpBlock">
      </div>
      <span id="helpBlock" class="help-block">A block of help text that breaks onto a new line and may extend beyond one line.</span>
    </form>
  </div><!-- /.bs-example -->
{% highlight html %}
<label class="sr-only" for="inputHelpBlock">Input with help text</label>
<input type="text" id="inputHelpBlock" class="form-control" aria-describedby="helpBlock">
...
<span id="helpBlock" class="help-block">A block of help text that breaks onto a new line and may extend beyond one line.</span>
{% endhighlight %}
</div>