ScalaComponent.Builder could choose best React component type

[japgolly]

Currently it always generates React classes but really, it could be a generic component builder that automatically decided the most appropriate React representation.

• big win is that many components could be lighter functional components wrapped in React.memo. In my usage, most components are stateless and the only lifecycle method specified is shouldComponentUpdate
• display name should be optional - not needed for functional components, could be automatically derived anyway (Automatic component name #470 )
• output type would need to reflect decision meaning it needs to be a type-level calculation meaning we need to track more stuff at the type level meaning install methods that expect to be used by .configure now explode with types meaning yuk
• would need a method to override automatic selection - users must always have full control

[thien-do]

Thanks @japgolly this will be huge 👍

most components are stateless and the only lifecycle method specified is shouldComponentUpdate

I have a question: this issue seems that the builder will choose between functional and class component only. Will it possible to generate a class component that extends from PureComponent?