<div class="input-group mb-3">
<div class="input-group-prepend">
<button type="button" class="btn btn-primary">Action</button>
<button type="button" class="btn btn-primary 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>
</div>
</div>
<input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
</div>
