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What is `koa-compose`, and why is it relevant to understanding how Koa applications are built?
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What is `koa-compose`, and why is it relevant to understanding how Koa applications are built?
Why does Koa ship with no built-in router, unlike Express which includes routing as part of its core?
What is `koa-static` used for?
How do you register a basic middleware function in a Koa application?
What is `koa-bodyparser` used for?
How does error handling typically work in Koa middleware, given its `async`/`await`-based design?
What does `ctx.state` provide in a Koa application?
What is Koa's `ctx` (Context) object, and how does it differ from Express's separate `req`/`res` parameters?
Why might error-handling middleware in Koa typically be registered FIRST (via `app.use()`) before other middleware in the application?
What is a general similarity between Koa and Express that makes learning one somewhat transferable to the other, despite their API and middleware-signature differences?
How would you set a JSON response body and status code in a Koa middleware/handler?