<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<br>
<div class="form-group input-group">
<span class="has-float-label">
<input class="form-control" id="first" type="text" placeholder="Name"/>
<label for="first">First</label>
</span>
<span class="has-float-label">
<input class="form-control" id="last" type="text" placeholder="Surname"/>
<label for="last">Last</label>
</span>
</div>
