PhoneJS dxSelectBox clear value

by tabalinas

HTML

<script src="http://ajax.aspnetcdn.com/ajax/globalize/0.1.1/globalize.min.js"></script>
<link rel="stylesheet" href="http://cdn3.devexpress.com/jslib/14.1.6/css/dx.ios7.default.css">
<link rel="stylesheet" href="http://cdn3.devexpress.com/jslib/14.1.6/css/dx.common.css">
<script src="http://cdn3.devexpress.com/jslib/14.2.3/js/dx.all.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
    <div data-bind="dxButton: { text: 'test'}">
       </div>
  <br />

JavaScript

ko.applyBindings(viewModel);