Node.js API Layering Example

Routes handle only forwarding; business logic resides in the service layer to facilitate unit testing.

javascript

1import { Router } from express;2import { List Articles } from "../services/article.js";34const router = Router();56router.get(/articles, async (request, result, next) => {7  try {8    const data = wait List Articles({ page: request.query.page });9    result.json({ code: 0, data });10  } catch (error) {11    next(error);12  }13});1415export default router;

Key Points

Async errors must be passed explicitly to `next`; otherwise, the middleware won't detect them.
Keep the routing layer free of query statements to facilitate future data source replacements.

Usage suggestions

Run the copied code in a local sample project first to verify expected behavior, then adapt the naming and structure to your business needs. Pasting directly into a large project can cause you to overlook contextual differences.

Understand Node.js's Event Loop and Asynchronous Patterns

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