Router Module example 70

What this example teaches

Router Module

Output

Express server listens on port 3000 and returns a JSON response on matched routes.

Line-by-line explanation

• Line 1 sets up the Router Module example: import express from "express";.
• Line 2 adds one required part of the working pattern: const app = express();.
• Line 3 adds one required part of the working pattern: app.get("/api/orders", (req, res) => {.
• Line 4 adds one required part of the working pattern: res.json({ id: 42, total: 119, status: "paid" });.
• Line 5 adds one required part of the working pattern: });.

Why this example is useful

This example is useful because it isolates router module without surrounding noise, so you can see the idea clearly.

Where it is used in real projects

Router Module appears in real ExpressJS work when a feature needs a clear pattern that can be reviewed and changed safely.

Beginner variation

Change one label, value or condition in the Router Module example and run it again.

Advanced variation

Combine Router Module with validation, error handling or reusable structure.