Function markAsUntouched

packages/forms/src/model/abstract_model.ts:1084–1103

(
    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},
  )

    sourceControl?: AbstractControl;
  }): void;
  markAsUntouched(
    opts: {onlySelf?: boolean; emitEvent?: boolean; sourceControl?: AbstractControl} = {},
  ): void {
    const changed = this.touched === true;
    this.touched = false;
    this._pendingTouched = false;

    const sourceControl = opts.sourceControl ?? this;
    this._forEachChild((control: AbstractControl) => {
      control.markAsUntouched({onlySelf: true, emitEvent: opts.emitEvent, sourceControl});
    });

    if (!opts.onlySelf) {
      this._parent?._updateTouched(opts, sourceControl);
    }

    if (changed && opts.emitEvent !== false) {
      this._events.next(new TouchedChangeEvent(false, sourceControl));
    }
  }

  /**
   * Marks the control as `dirty`. A control becomes dirty when