title: Is there a way to trigger a select event after typing 3 char?
body: <p>Im trying to trigger an event after the user types 3 character in the select input, basically ive got a service that loads all the options of the select ONLY if there are 3 chars on the textbox of the select.</p>
  
  <p>How can I do that?</p>
  
  <blockquote>
    <p>My html:</p>
  </blockquote>
  
  <pre><code>    &lt;fnd-extended-select label="Seleziona Insegna:" [autocomplete]="true"  [(ngModel)]="filter.ensign" (click)="ensignValues($event)"&gt;
        &lt;fnd-option *ngFor="let p of ensignValue?.ensign" [value]="p.id"&gt;{{p.description}}&lt;/fnd-option&gt;
      &lt;/fnd-extended-select&gt;
  </code></pre>
  
  <blockquote>
    <p>My component.ts:</p>
  </blockquote>
  
  <pre><code>  ensignValues() {
  
      this.accordiService.ensignValues().subscribe(
        (res: EnsignFilter) =&gt; {
          this.ensignValue = new EnsignFilter(res);
          console.log(res);
  
        },
        errors =&gt; {
          Utils.notifyErrors(errors, this.notificationsService);
        });
    }
  </code></pre>