This usually means that the user mixed up our lowercase/uppercase naming convention; see https://github.com/facebook/react/pull/3429#issuecomment-85166440.

We could add a message like

> Warning: The tag <commentBox> is unrecognized in this browser. If you meant to render a React component, start its name with an uppercase letter.

We'd check this only once per tag and only in development mode.

case 'textarea':
        ReactDOMFiberTextarea.updateWrapper(domElement, nextRawProps);
        break;
      case 'select':
        
        
        ReactDOMFiberSelect.postUpdateWrapper(domElement, nextRawProps);
        break;
    }
  },
  restoreControlledState(
    domElement: Element,
    tag: string,
    props: Object,
  ): void {
    switch (tag) {
      case 'input':
        ReactDOMFiberInput.restoreControlledState(domElement, props);
        return;
      case 'textarea':
        ReactDOMFiberTextarea.restoreControlledState(domElement, props);
        return;
      case 'select':
        ReactDOMFiberSelect.restoreControlledState(domElement, props);
        return;
    }
  },
};
module.exports = ReactDOMFiberComponent;