New Flow Language Features for React

We have thousands of engineers committing React code every day to Meta’s largest codebases. Part of our responsibility on the Flow team is to make it as easy as possible for anyone to contribute, from design system React experts to C++ engineers making one-off internal pages to support their backend services. Over the last year, we’ve built several new language features to make it easier than ever

[efcl]

Flow v0.233.0で導入された`component`と`hook`構文について。 通常の関数とは異なる構文にすることでPropsのread-onlyのチェック、refのチェック、Hooksのチェックなどが行える

[mizdra]

React のために Flow に component 構文、hook 構文, renders type を導入する話。Meta 社内のための言語ならではの機能だ。正直分割代入の中で型注釈付けられる機能は TypeEcript にも欲しいなー: https://github.com/microsoft/TypeScript/issues/29526