"Referenced projects must have the new composite setting enabled" does not hold true

🔎 Search Terms

composite, project references, solution-style tsconfig

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about tsconfig.

⏯ Playground Link

https://vite.new/react-ts

💻 Code

The above link is a project created from the vite react-ts template (https://vite.new/react-ts).
It uses project references in tsconfig.json, but no composite: true specified in both tsconfig.app.json and tsconfig.node.json.

On the other hand, the TypeScript handbook says:

Referenced projects must have the new composite setting enabled.

🙁 Actual behavior

The project builds (npm run build) successfully without composite: true.

🙂 Expected behavior

If I understand correctly, the documentation means I have to specify composite: true when using references. I'd expect an error or warning if I didn't follow the guide.

Additional information about the issue

I'm curious whether it's a bug or a feature.
If it's a bug, what's the expected behavior?
If it's a feature, I'd like to see the documentation updated accordingly.

Bắt đầu với các phần project references và composite trong TypeScript handbook, sau đó tái hiện hành vi bằng các tsconfig.json, tsconfig.app.json và tsconfig.node.json được tham chiếu từ template Vite React TypeScript bằng npm run build. Xác định liệu composite có bắt buộc hay không, đồng thời ghi lại hành vi thu được hoặc diagnostic dự kiến để handbook khớp với implementation.