<datepicker [(ngModel)]="model.registrationDate" id="registrationDate" name="registrationDate" required autocomplete="off">

<datepicker [(ngModel)]="a" [range]="true" [(dateFrom)]="a" [(dateTo)]="b" id="registrationDate" name="registrationDate" required autocomplete="off"> <button (click)="test()">test

a: Date = new Date(); b: Date = new Date();

test(){ console.log(this.a , this.b) }