Function updateValidAndValue

src/logic/createFormControl.ts:364–419

(
    name: InternalFieldName,
    shouldSkipSetValueAs: boolean,
    value?: unknown,
    ref?: Ref,
  )

  };

  const updateValidAndValue = (
    name: InternalFieldName,
    shouldSkipSetValueAs: boolean,
    value?: unknown,
    ref?: Ref,
  ) => {
    const field: Field = get(_fields, name);

    if (field) {
      if (hasExplicitNullIntermediate(name)) {
        return;
      }

      const wasUnsetInFormValues = isUndefined(get(_formValues, name));
      const defaultValue = get(
        _formValues,
        name,
        isUndefined(value) ? get(_defaultValues, name) : value,
      );

      isUndefined(defaultValue) ||
      (ref && (ref as HTMLInputElement).defaultChecked) ||
      shouldSkipSetValueAs
        ? set(
            _formValues,
            name,
            shouldSkipSetValueAs ? defaultValue : getFieldValue(field._f),
          )
        : setFieldValue(name, defaultValue);

      if (_state.mount && !_state.action) {
        _setValid();

        if (
          wasUnsetInFormValues &&
          _formState.isDirty &&
          (_proxyFormState.isDirty || _proxySubscribeFormState.isDirty)
        ) {
          const isDirty = _getDirty();
          if (!isDirty) {
            _formState.isDirty = false;
            _subjects.state.next({ ..._formState });
          }
        }

        if (
          props.shouldUnregister &&
          wasUnsetInFormValues &&
          !isUndefined(get(_formValues, name)) &&
          isWatched(name, _names)
        ) {
          _state.watch = true;
        }
      }
    }
  };

  const updateTouchAndDirty = (