Customize the width of dropdown menus in Bootstrap

Using a dropdown menu, I want to display options for candidates that can be chosen. Additionally, I would like an input field to filter these options; so that when text is entered, the dropdown menu adjusts accordingly. Specifically, I am looking to set the width of the dropdown menu equal to the input field width. How can I achieve this adjustment and ensure that the dropdown menu appears when text is inputted into the field?

The HTML code currently in use:

<div class="input-group">
    <input type="text" class="form-control" aria-label="...">
    <div class="input-group-btn">
        <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            <span class="caret"></span>
        </button>
        <ul class="dropdown-menu dropdown-menu-right">
            <li><a href="#">Action</a></li>
            <li><a href="#">Another action</a></li>
            <li><a href="#">Something else here</a></li>
            <li role="separator" class="divider"></li>
            <li><a href="#">Separated link</a></li>
        </ul>
    </div><!-- /btn-group -->

Answer №1

It seems like you're in need of a suggestion search box with selectable choices based on your description.

Take a look at this thread: Twitter Bootstrap autocomplete dropdown / combobox with Knockoutjs

Here are some suggested solutions: Selectize.js or Select2

Keep in mind that adjusting the width of the dropdown to match the input's width may not work well if it cuts off the choices. For example, if the input is just one character, the dropdown would only display the first character of each choice. This might not be the desired outcome.

Answer №2

Here is a potential solution:

$('.dropdown-menu').width($('.input-group').width());
.input-group{
  width:33%;
  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

<div class="input-group">
<input type="text" class="form-control" aria-label="...">
<div class="input-group-btn">
    <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"><span class="caret"></span></button>
    <ul class="dropdown-menu dropdown-menu-right">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li role="separator" class="divider"></li>
        <li><a href="#">Separated link</a></li>
    </ul>
</div><!-- /btn-group -->

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