Creating Server and Routing with Express.js in Node.js

Creating a server and handling routing with Express.js in Node.js is a core skill in backend development. Express.js makes it easy to build servers and manage different routes using simple methods. In this lesson, you will learn how to create a server and implement routing step by step.

Create Server in Express.js

Basic Server Setup

const express = require(‘express’);
const app = express();

app.listen(3000, () => {
console.log(‘Server running on port 3000’);
});

This code creates a basic server using Express.js.

Handling Routes in Express.js

Home Route

app.get(‘/’, (req, res) => {
res.send(‘Home Page’);
});

About Route

app.get(‘/about’, (req, res) => {
res.send(‘About Page’);
});

Contact Route

app.get(‘/contact’, (req, res) => {
res.send(‘Contact Page’);
});

Routing in Express.js allows you to handle different URLs easily.

Handling POST Request in Express.js

POST Route Example

app.post(‘/data’, (req, res) => {
res.send(‘Data received successfully’);
});

POST requests are used to send data from the client to the server.

Route Parameters in Express.js

Example of Route Parameters

app.get(‘/user/:id’, (req, res) => {
res.send(User ID: ${req.params.id});
});

Route parameters allow you to create dynamic routes in Express.js.

Query Parameters in Express.js

Example of Query Parameters

app.get(‘/search’, (req, res) => {
res.send(Search query: ${req.query.q});
});

Query parameters are used to pass data in the URL.

Organizing Routes in Express.js

Example of Clean Structure

You can organize routes into separate files for better code structure in large applications. This improves readability and maintainability.

Real-World Use of Routing in Express.js

Routing in Express.js is used in APIs and web applications to handle different endpoints such as login, signup, products, and orders. It is a core part of backend development.

Best Practices for Routing in Express.js

Use Clear Route Names

Keep route names meaningful and easy to understand.

Group Related Routes

Organize routes based on features like users, products, and orders.

Avoid Duplicate Routes

Ensure each route is unique to prevent conflicts.

FAQs on Express.js Routing

What is routing in Express.js

Routing is the process of handling different URLs and requests in a server.

What is route parameter

Route parameters are dynamic values in the URL used to fetch specific data.

What is query parameter

Query parameters are used to send additional data through the URL.

Continue Learning Backend Development

Now that you understand how to create a server and handle routing with Express.js, you are ready to move to the next lesson where you will learn about middleware in detail. To explore more structured tutorials and courses, click here for more free courses.