salix/client/core/src/drop-down/drop-down.html

<ul class="dropdown" ng-show="$ctrl.show" ng-init="search = ''">
    <li ng-show="$ctrl.filter" class="filter">
        <input placeholder="{{'Search' | translate}}" type="text" ng-model="search"/>
        <vn-icon icon="clear" ng-click="search = ''"></vn-icon>
    </li>
    <li ng-repeat="item in $ctrl.items | filter:search" ng-click="$ctrl.selected = item">{{::item.name}}</li>
</ul>