reactive form

formulario-genero.component.ts

  ngOnInit(): void {
    this.form = this.formBuilder.group({
      nombre: ['', {
        validators: [Validators.required, Validators.minLength(3), primeraLetraMayuscula()]
      }]
    });

    if (this.modelo !== undefined){
      this.form.patchValue(this.modelo);
    }
  }