demo/src/app/components/+datepicker/demos/trigger-by-isopen-property/trigger-by-isopen-property.html
<div class="row">
<div class="col-xs-8 col-8 col-md-5 col-lg-4 form-group">
<input class="form-control" placeholder="Datepicker" bsDatepicker [isOpen]="isOpen"/>
</div>
<div class="col-xs-4 col-4 col-md-4 form-group">
<input class="btn btn-success" type="button" value="Toggle" (click)="isOpen = !isOpen">
</div>
</div>