<div class="row">
    <div class="col-md-12">
        <div class="btn-group">
            <button type="button" class="btn btn-default">1</button>
            <button type="button" class="btn btn-default">2</button>
            <div class="btn-group">
                <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">Dropdown</button>
                <ul class="dropdown-menu">
                    <li><a href="#">Dropdown link</a></li>
                    <li><a href="#">Dropdown link</a></li>
                </ul>
            </div>
        </div>
    </div>
</div>

<div class="row">
    <div class="col-md-12">
        <div class="btn-group">
            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">Default</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">Primary</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown">Success</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown">Info</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown">Warning</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown">Danger</button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
    </div>
    <div class="col-md-12">
        <!--split-->
        <div class="btn-group">
            <button type="button" class="btn btn-default">Default</button>
            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
                <span class="caret"></span>
                <span class="sr-only">Toggle Dropdown</span>
            </button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-primary">Primary</button>
            <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown"><span class="sr-only">Toggle Dropdown</span><span
                    class="caret"></span></button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-success">Success</button>
            <button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown"><span
                    class="caret"></span><span class="sr-only">Toggle Dropdown</span></button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-info">Info</button>
            <button type="button" class="btn btn-info dropdown-toggle" data-toggle="dropdown"><span
                    class="caret"></span> <span class="sr-only">Toggle Dropdown</span></button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-warning">Warning</button>
            <button type="button" class="btn btn-warning dropdown-toggle" data-toggle="dropdown"><span
                    class="caret"></span> <span class="sr-only">Toggle Dropdown</span></button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
        <div class="btn-group">
            <button type="button" class="btn btn-danger">Danger</button>
            <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown"><span
                    class="caret"></span><span class="sr-only">Toggle Dropdown</span></button>
            <ul class="dropdown-menu" role="menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </div>
        <!-- /btn-group -->
    </div>
    <div class="col-md-12">
        <!-- Large button group -->
        <div class="btn-group">
            <button class="btn btn-default btn-lg dropdown-toggle" type="button" data-toggle="dropdown">Large button
            </button>
            <div style="margin-left: 2em" class="dropdown-menu">
                ...
            </div>
        </div>
        <!-- Small button group -->
        <div class="btn-group">
            <button class="btn btn-default btn-sm dropdown-toggle" type="button" data-toggle="dropdown">Small button
            </button>
            <div style="margin-left: 2em" class="dropdown-menu">
                ...
            </div>
        </div>
        <!-- Extra small button group -->
        <div class="btn-group">
            <button class="btn btn-default btn-xs dropdown-toggle" type="button" data-toggle="dropdown">Extra small
                button
            </button>
            <div style="margin-left: 2em" class="dropdown-menu">
                ...
            </div>
        </div>
    </div>
</div>