<form> <div>
  <label for="firstName">Imię:</label>
  <input name="firstName" [(ngModel)]="firstName"> </div>
  <div>
  <label for="lastName">Nazwisko:</label> <input name="lastName" [(ngModel)]="lastName">
  </div> </form>
  <hr/>
  <h1>Witaj, <span>{{ fullName() }}</span>!</h1>
