javascript - AngularJS Filter search with empty filter -

i have problem.

i made filter search, , when input dirty empty, none elements show, wanna show when filter empty.

<div class="zc-select" target="selectedcountry">     <div class="principal-select" ng-click="openselect($event)">       <div ng-show="selectedcountry.length === 0">         select country       </div>       <div ng-show="selectedcountry.length > 0">         {{selectedcountry[0].name}}       </div>       <i class="fa fa-chevron-down"></i>     </div>     <div class="select-search">          <i class="fa fa-search"></i>       <input placeholder="want search?" max-length="44" only-text ng-model="countryfilter">     </div>     <ul class="select-elems">       <li ng-repeat="i in countries | filter:countryfilter" select-id="{{i.id}}" ng-click="setselect(i); profile_info.$dirty = true">{{i.name}}</li>     </ul>   </div>