I think type safety was a core design constraint for JSX (since XHP — where JSX came from — is typechecked, after all). It’s also nice to be able to do this che

I think type safety was a core design constraint for JSX (since XHP — where JSX came from — is typechecked, after all). It’s also nice to be able to do this checking with the type system you already have (TS, Flow, Reason), rather than having to install extra tooling that has to then interoperable with each of these type systems.