Function shouldRenderByError

src/logic/createFormControl.ts:489–536

(
    name: InternalFieldName,
    isValid?: boolean,
    error?: FieldError,
    fieldState?: {
      dirty?: FieldNamesMarkedBoolean<TFieldValues>;
      isDirty?: boolean;
      touched?: FieldNamesMarkedBoolean<TFieldValues>;
    },
  )

  };

  const shouldRenderByError = (
    name: InternalFieldName,
    isValid?: boolean,
    error?: FieldError,
    fieldState?: {
      dirty?: FieldNamesMarkedBoolean<TFieldValues>;
      isDirty?: boolean;
      touched?: FieldNamesMarkedBoolean<TFieldValues>;
    },
  ) => {
    const previousFieldError = get(_formState.errors, name);
    const shouldUpdateValid =
      (_proxyFormState.isValid || _proxySubscribeFormState.isValid) &&
      isBoolean(isValid) &&
      _formState.isValid !== isValid;

    if (_options.delayError && error) {
      delayErrorCallback = debounce(() => updateErrors(name, error));
      delayErrorCallback(_options.delayError);
    } else {
      clearTimeout(timer);
      delayErrorCallback = null;
      error
        ? set(_formState.errors, name, error)
        : unset(_formState.errors, name);
      _formState.errors = { ..._formState.errors };
    }

    if (
      (error ? !deepEqual(previousFieldError, error) : previousFieldError) ||
      !isEmptyObject(fieldState) ||
      shouldUpdateValid
    ) {
      const updatedFormState = {
        ...fieldState,
        ...(shouldUpdateValid && isBoolean(isValid) ? { isValid } : {}),
        errors: _formState.errors,
        name,
      };

      _formState = {
        ..._formState,
        ...updatedFormState,
      };

      _subjects.state.next(updatedFormState);
    }
  };

  const _runSchema = async (name?: InternalFieldName[]) => {
    _updateIsValidating(name, true);