Tags Input Plugin

HTML

<script src="https://rawgit.com/TimSchlechter/bootstrap-tagsinput/master/src/bootstrap-tagsinput.js"></script>
<script src="https://rawgit.com/bassjobsen/Bootstrap-3-Typeahead/master/bootstrap3-typeahead.js"></script>
<link rel="stylesheet" href="https://rawgit.com/timschlechter/bootstrap-tagsinput/master/src/bootstrap-tagsinput.css">
<input type="text" id="category" data-role="tagsinput" />

JavaScript

$('input').tagsinput({
  typeahead: {
    source: ['Amsterdam', 'Washington', 'Sydney', 'Beijing']
  },
  freeInput: true
});
$('input').on('itemAdded', function(event) {
    setTimeout(function(){
        $(">input[type=text]",".bootstrap-tagsinput").val("");
    }, 1);
});