[wongmjane]

`CS` in this context stands for ComponentScript. It appears to have something to do with React Native.

`CSPlaygroundGraphQLFriendsQuery` is a demonstration for Facebook engineers internally to show how to display a list of "oneself's friends with auto-pagination" using GraphQL and ComponentScript inside their Facebook main app

P.S. I don't work at Facebook. But this is something I stumbled across their app.

[amasad]

Like the demo was released and accessible in the app? Or did you see it in the RN JS code?

[wongmjane]

The demo is included as part of their main app (even in production) (at least in Facebook for Android), and was supposedly only accessible by Facebook engineers.