Formulario Validar Angular
<input matInput placeholder="firstname" class="form-control" name="firstname" ngModel required>
<input matInput placeholder="lastname" class="form-control" name="lastname" ngModel required>
<input matInput placeholder="email" class="form-control" name="email" ngModel required>
<textarea rows="4" cols="50" matInput placeholder="message" class="form-control" name="message" ngModel required></textarea>
Rich Rhinoceros