Named Scopes

Problem

Create one resource per request lifecycle.

Solution

const Request = scope('request');
const Session = token<{ id: string }>('Session');

const root = createContainer([
  factoryProvider(Session, [], () => ({ id: crypto.randomUUID() }), { lifetime: Request }),
]);

const request = root.createScope(Request);
const services = await request.resolve({ session: Session });
await request.dispose();

Pitfalls

Resolving Session from root throws because no matching request scope owns it. A singleton cannot depend on Session; use matching scoped lifetime for that factory.

Related

• Usage Guide