Method registerControl

packages/forms/src/model/form_group.ts:248–255

(name: K, control: TControl[K])

  ): AbstractControl<any>;

  registerControl<K extends string & keyof TControl>(name: K, control: TControl[K]): TControl[K] {
    const existingControl = this._find(name as string);
    if (existingControl) return existingControl as TControl[K];
    this.controls[name] = control;
    control.setParent(this as FormGroup);
    control._registerOnCollectionChange(this._onCollectionChange);
    return control;
  }

  /**
   * Add a control to this group. In a strongly-typed group, the control must be in the group's type