anglerjs dropdown with please se;lect key code example
Example: angularjs dropdown
<select ng-options="v.name for v in variants | filter:{type:2}" ng-change="calculateServicesSubTotal(item)"
ng-model="item.selectedVariant" ng-show="item.id==8" name="posterVariants"
ng-required="item.id==8 && item.quantity > 0" class="ng-pristine ng-valid ng-valid-required">
<option value="?" selected="selected"></option>
<option value="0">set of 6 traits</option>
<option value="1">5 complete sets</option>
</select>