<div>
  <button
    style="width:250px; "
    type="button"
    class="btn btn-default"
    ng-model="selectedstyle"
    bs-options="sty for sty in styles "
    placeholder="Styles"
    ng-change="selectchange()"
    bs-select
  >
    Action <span class=""></span>
  </button>
</div>
