Modularizing Routes with Express Router

Adding Parameters to Routes in Express JS:

Adding Middleware for Processing Requests in Express JS:

As your application grows, managing routes in a single file can become cumbersome. Express Router allows you to create modular route handlers:

Create a separate file for routes (e.g., routes.js):

Javascript


                    const express = require('express');
const router = express.Router();

router.get('/', (req, res) => {
    res.send('Hello from Express routes!');
});

app.get('/users/:id', (req, res) => {
    const userId = req.params.id; // Access the parameter value
    res.send(`User with ID: ${userId} from routes`);
});

module.exports = router;

Importing and using the router in your main app (app.js):

Javascript


                    const express = require('express');
const app = express();

// Use environment variable or default to port 3000
const port = process.env.PORT || 3000;

// Import the router
const routes = require('./routes');

// Use the router for all paths starting with '/'
app.use('/', routes);


app.listen(port, () => {
    console.log(`Server listening on port ${port}`);
});

Getting Started with Express JS

Express JS is a versatile, minimalist web framework for NodeJS that simplifies the development of back-end applications and APIs for web and mobile applications. Its flexibility and powerful features enable you to create robust and scalable web projects with minimal code, making it a popular choice among developers. Express is released as free and open-source software under the MIT License.

Table of Content

Installing Express JS
Running a simple web server in Express JS
Adding Routes for Handling request in Express JS
Adding Parameters to Routes in Express JS
Modularizing Routes with Express Router:
Adding Middleware for Processing Requests in Express JS
Adding Error Handling Middleware in Express JS

Modularizing Routes with Express Router

Importing and using the router in your main app (app.js):

Getting Started with Express JS

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