Method constructor

packages/forms/src/model/form_group.ts:209–227

* Creates a new `FormGroup` instance. * * @param controls A collection of child controls. The key for each child is the name * under which it is registered. * * @param validatorOrOpts A synchronous validator function, or an array of * such functions, or an `AbstractControlOptions`

(
    controls: TControl,
    validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null,
    asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,
  )

   *
   */
  constructor(
    controls: TControl,
    validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null,
    asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null,
  ) {
    super(pickValidators(validatorOrOpts), pickAsyncValidators(asyncValidator, validatorOrOpts));
    (typeof ngDevMode === 'undefined' || ngDevMode) && validateFormGroupControls(controls);
    this.controls = controls;
    this._initObservables();
    this._setUpdateStrategy(validatorOrOpts);
    this._setUpControls();
    this.updateValueAndValidity({
      onlySelf: true,
      // If `asyncValidator` is present, it will trigger control status change from `PENDING` to
      // `VALID` or `INVALID`. The status should be broadcasted via the `statusChanges` observable,
      // so we set `emitEvent` to `true` to allow that during the control creation process.
      emitEvent: !!this.asyncValidator,
    });
  }

  public controls: ɵTypedOrUntyped<TControl, TControl, {[key: string]: AbstractControl<any>}>;