how to get multiple values as an array, Bootstrap Tagsinput

 $(document).ready(function(){  

  alert($('#input').tagsinput('items'));
});

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://cdn.jsdelivr.net/bootstrap.tagsinput/0.8.0/bootstrap-tagsinput.css" rel="stylesheet"/>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

<script src="https://cdn.jsdelivr.net/bootstrap.tagsinput/0.8.0/bootstrap-tagsinput.min.js"></script>

<input id="input" type="text" value="Istanbul, Adana, Adiyaman, Afyon, Agri, Aksaray, Ankara" data-role="tagsinput" class="form-control" />