Dependency injection

@fluixi/start/di provides an Angular-style injector — useful for sharing services, clients and config without prop-drilling, with per-request isolation on the server.

import { injectionToken, provide, inject } from '@fluixi/start/di';

const ApiClient = injectionToken<ApiClient>('ApiClient');

// provide it (e.g. at the app root):
provide(ApiClient, { useFactory: () => new ApiClient(env.API_URL) });

// inject it anywhere in the owner tree:
const api = inject(ApiClient);

Per-request roots

On the server the root injector is created per request, so two concurrent requests never share instances — a request-scoped service (a DB connection, a user session) stays isolated. On the client it's a singleton.

Providers support useValue, useClass, useFactory(deps) and useExisting, with circular- dependency detection and an onDestroy lifecycle.

Next: Internationalization.