Function updateTouchAndDirty

src/logic/createFormControl.ts:421–487

(
    name: InternalFieldName,
    fieldValue: unknown,
    isBlurEvent?: boolean,
    shouldDirty?: boolean,
    shouldRender?: boolean,
  )

  };

  const updateTouchAndDirty = (
    name: InternalFieldName,
    fieldValue: unknown,
    isBlurEvent?: boolean,
    shouldDirty?: boolean,
    shouldRender?: boolean,
  ): Partial<
    Pick<FormState<TFieldValues>, 'dirtyFields' | 'isDirty' | 'touchedFields'>
  > => {
    let shouldUpdateField = false;
    let isPreviousDirty = false;
    const output: Partial<FormState<TFieldValues>> & { name: string } = {
      name,
    };

    if (!_options.disabled) {
      if (!isBlurEvent || shouldDirty) {
        const isCurrentFieldPristine = deepEqual(
          get(_defaultValues, name),
          fieldValue,
        );

        if (_proxyFormState.isDirty || _proxySubscribeFormState.isDirty) {
          isPreviousDirty = _formState.isDirty;

          _formState.isDirty = output.isDirty =
            !isCurrentFieldPristine || _getDirty();
          shouldUpdateField = isPreviousDirty !== output.isDirty;
        }

        isPreviousDirty = !!get(_formState.dirtyFields, name);

        if (isCurrentFieldPristine !== _formState.isDirty) {
          _formState.dirtyFields = getDirtyFields(_defaultValues, _formValues);
        } else {
          isCurrentFieldPristine
            ? unset(_formState.dirtyFields, name)
            : set(_formState.dirtyFields, name, true);
        }

        output.dirtyFields = _formState.dirtyFields;
        shouldUpdateField =
          shouldUpdateField ||
          ((_proxyFormState.dirtyFields ||
            _proxySubscribeFormState.dirtyFields) &&
            isPreviousDirty !== !isCurrentFieldPristine);
      }

      if (isBlurEvent) {
        const isPreviousFieldTouched = get(_formState.touchedFields, name);

        if (!isPreviousFieldTouched) {
          set(_formState.touchedFields, name, isBlurEvent);
          output.touchedFields = _formState.touchedFields;
          shouldUpdateField =
            shouldUpdateField ||
            ((_proxyFormState.touchedFields ||
              _proxySubscribeFormState.touchedFields) &&