Stateless function components without React.createElement or JSX?

react-docgen is unable to find stateless function components that don't contain JSX or React.createElement call expressions.

This might be the case when some helper library is used. This will also fail if the official React.DOM helpers are used (https://github.com/reactjs/react-docgen/pull/71). Another failing case would be if only React components are returned, but React.createElement was never called because the components were wrapped in React.createFactory.

What about adding support for another heuristic, such as having a propTypes property (and to be even more specific, a propTypes property with an object containing React.PropTypes entries).

I'm happy to implement this and add tests if this sounds reasonable to the maintainers.

Inizia tracciando il rilevamento esistente dei componenti funzionali stateless in react-docgen e rivedendo i test per i componenti che usano React.createElement. Confronta l’euristica propTypes proposta con gli helper React.DOM e i casi React.createFactory; il lavoro è completato quando questi componenti vengono rilevati senza compromettere il comportamento di rilevamento esistente e i test coprono i pattern supportati.