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# Input group

Easily extend form controls by adding text, buttons, or button groups on either side of textual inputs.

## Basic example

Place one add-on or button on either side of an input. You may also place one on both sides of an input. We do not support multiple form-controls in a single input group and `<label>`s must come outside the input group.

@
@example.com
Your vanity URL
https://example.com/users/
$ .00
$ 0.00

    <div class="input-group">
      <span class="input-group-addon" id="basic-addon1">@</span>
      <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
    </div>
    <br>
    <div class="input-group">
      <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
      <span class="input-group-addon" id="basic-addon2">@example.com</span>
    </div>
    <br>
    <label for="basic-url">Your vanity URL</label>
    <div class="input-group">
      <span class="input-group-addon" id="basic-addon3">https://example.com/users/</span>
      <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3">
    </div>
    <br>
    <div class="input-group">
      <span class="input-group-addon">$</span>
      <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
      <span class="input-group-addon">.00</span>
    </div>
    <br>
    <div class="input-group">
      <span class="input-group-addon">$</span>
      <span class="input-group-addon">0.00</span>
      <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
    </div>

## Sizing

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

@
@

    <div class="input-group input-group-lg">
      <span class="input-group-addon" id="sizing-addon1">@</span>
      <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="sizing-addon1">
    </div>
    <br>
    <div class="input-group">
      <span class="input-group-addon" id="sizing-addon2">@</span>
      <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="sizing-addon2">
    </div>

## Checkboxes and radio addons

Place any checkbox or radio option within an input group’s addon instead of text.

    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-addon">
            <input type="checkbox" aria-label="Checkbox for following text input">
          </span>
          <input type="text" class="form-control" aria-label="Text input with checkbox">
        </div>
      </div>
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-addon">
            <input type="radio" aria-label="Radio button for following text input">
          </span>
          <input type="text" class="form-control" aria-label="Text input with radio button">
        </div>
      </div>
    </div>

## Multiple addons

Multiple add-ons are supported and can be mixed with checkbox and radio input versions.

$
$ 0.00

    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-addon">
            <input type="checkbox" aria-label="Checkbox for following text input">
          </span>
          <span class="input-group-addon">$</span>
          <input type="text" class="form-control" aria-label="Text input with checkbox">
        </div>
      </div>
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-addon">$</span>
          <span class="input-group-addon">0.00</span>
          <input type="text" class="form-control" aria-label="Text input with radio button">
        </div>
      </div>
    </div>

## Button addons

Buttons in input groups must wrapped in a `.input-group-btn` for proper alignment and sizing. This is required due to default browser styles that cannot be overridden.

    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <span class="input-group-btn">
            <button class="btn btn-secondary" type="button">Go!</button>
          </span>
          <input type="text" class="form-control" placeholder="Search for..." aria-label="Search for...">
        </div>
      </div>
      <div class="col-lg-6">
        <div class="input-group">
          <input type="text" class="form-control" placeholder="Search for..." aria-label="Search for...">
          <span class="input-group-btn">
            <button class="btn btn-secondary" type="button">Go!</button>
          </span>
        </div>
      </div>
    </div>
    <br>
    <div class="row">
      <div class="col-lg-offset-3 col-lg-6">
        <div class="input-group">
          <span class="input-group-btn">
            <button class="btn btn-secondary" type="button">Hate it</button>
          </span>
          <input type="text" class="form-control" placeholder="Product name" aria-label="Product name">
          <span class="input-group-btn">
            <button class="btn btn-secondary" type="button">Love it</button>
          </span>
        </div>
      </div>
    </div>

## Buttons with dropdowns

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

## Segmented buttons

    <div class="row">
      <div class="col-lg-6">
        <div class="input-group">
          <div class="input-group-btn">
            <button type="button" class="btn btn-secondary">Action</button>
            <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              <span class="sr-only">Toggle Dropdown</span>
            </button>
            <div class="dropdown-menu">
              <a class="dropdown-item" href="#">Action</a>
              <a class="dropdown-item" href="#">Another action</a>
              <a class="dropdown-item" href="#">Something else here</a>
              <div role="separator" class="dropdown-divider"></div>
              <a class="dropdown-item" href="#">Separated link</a>
            </div>
          </div>
          <input type="text" class="form-control" aria-label="Text input with segmented button dropdown">
        </div>
      </div>
      <div class="col-lg-6">
        <div class="input-group">
          <input type="text" class="form-control" aria-label="Text input with segmented button dropdown">
          <div class="input-group-btn">
            <button type="button" class="btn btn-secondary">Action</button>
            <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              <span class="sr-only">Toggle Dropdown</span>
            </button>
            <div class="dropdown-menu dropdown-menu-right">
              <a class="dropdown-item" href="#">Action</a>
              <a class="dropdown-item" href="#">Another action</a>
              <a class="dropdown-item" href="#">Something else here</a>
              <div role="separator" class="dropdown-divider"></div>
              <a class="dropdown-item" href="#">Separated link</a>
            </div>
          </div>
        </div>
      </div>
    </div>

## Accessibility

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

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