title: Angular 5 use ng-select as an autocomplete field
body: <p>select from ... in my application. Is it possible to use it as an autocomplete field, the select value is not required. I want to use ng-select because it uses a virtual scroll and the mat-autocomplete from angular material doesn't. And with a lot of values the mat-autocomplete becomes slow. </p>
  
  <p>My question: Is it possible to use the ng-select just as an autocomplete function. In other words: ng-select without the required select option. If I click away from the ng-select field, the value will be empty if nothing selected. The value has to stay..</p>
  
  <pre><code>&lt;label&gt;Your first ng-select&lt;/label&gt;
        &lt;ng-select class="custom" [items]="cities"
                  bindLabel="name"
                  placeholder="Select city"
                  [typeahead]="typeahead"
                  [(ngModel)]="selectedCity"&gt;
        &lt;/ng-select&gt;
  </code></pre>