Node JS Tutorial for Beginners

With the emergence of numerous popular frameworks such as bootstrap, Angular JS, and others, the modern online application has come a long way. These frameworks are all built on top of the well-known JavaScript framework. 

However, there was a hole in designing server-based apps, which is where learn Node.js came into play. 

Although Node.js is built on the JavaScript framework, it is a backend development framework used to create server-side applications. Throughout the lesson, we'll look at the Node.js tutorial for beginners in-depth and see how we can use it to build server-based applications.

Node.js tutorial for beginners

What is Node JS

Node.js is a cross-platform, open-source runtime environment for developing server-side web applications. Applications created with Node.js are written in JavaScript and can operate on various operating systems. 

Node.js is a real-time online application framework that uses an event-driven architecture and a non-blocking Input/Output API to improve throughput and scalability. 

The frameworks available for web development for a long time were all based on a stateless approach. A stateless model is one in which the data generated in one session (such as user settings and events) is not saved for use in a subsequent session with that user.

It took a lot of effort to keep track of a user's session information between requests. However, with Node.js, web applications may now have real-time two-way connections, where the client and the server can initiate communication and freely share data.

Why Use Node JS

In the following chapters, we'll look at the actual value of Node.js, but first, let's look at what makes this framework so popular. Most applications are built using a stateless request-response framework over time. In these kinds of apps, it's up to the developer to make sure to write the correct code to keep the user's web session alive as they work with the system.

You may now work in real-time and have two-way communication with Node.js web applications. The state is preserved, and the communication can be initiated by either the client or the server.

Features of Node JS

Let's take a look at some of Node.js' most essential features:

1. Concurrent request processing is aided by asynchronous event-driven IO, which is undoubtedly Node.js' most compelling feature. This functionality essentially means that whenever Node receives a request for an Input/Output operation, it will do the action in the background while continuing to process other requests. 

This differs from other programming languages in several ways. The code below shows a simple example of this:

var http = require('http'); 

http.createServer(function (req, res) { 

res.writeHead(200, {'Content-Type': 'text/html'}); 

res.end('Hello World!'); 


Learn node js


1. The above code demonstrates how we create a server in Node JS

2. This (req, res) shows the request and response commands.

3. The writeHead() feature of the 'http' module sends a response header to the request. 

4. A three-digit HTTP status code, such as 202, is used. 

5. The response headers are the last argument headers. 

6. The second input can optionally be a human-readable statusMessage.

7. Content-Type shows the type of content of the document.

8. res.end shows the output in the Node server.

2. The V8 JavaScript Runtime engine, which Google Chrome also utilizes, is used by Node. In addition, Node features a wrapper for the JavaScript engine that speeds up the runtime engine and, as a result, the processing of requests within Node.

3. Concurrent request handling: Another essential feature of Node is its ability to manage several connections with very little overhead in a single process.

4. Node JS Uses Javascript Library: This is yet another crucial feature of Node.js development. Because a large portion of the development community is already familiar with javascript, that's why developing with Node.js becomes easier.

Applications of Node JS

1. Real-time chatbots: Used in designing real-time chatbots

2. Game servers: This is the framework for you if you need a fast and high-performance server that can handle thousands of requests at once.

Game servers

3. Suitable for collaborative workplaces: This is ideal for document management setups. Multiple persons will submit their documents and make frequent modifications by checking out and checking in records in a document management environment. Because the event loop in Node.js can be triggered anytime documents are modified in a document-managed climate, it's ideal for these setups.

4. Advertisement servers: You may receive thousands of requests to extract adverts from a central server, and Node.js is an excellent foundation for this.

5. Making Streaming Servers: Another promising application for Node is multimedia streaming servers, where clients make requests to fetch various multimedia files from the server.

Making Streaming Servers

When you require a lot of parallelisms but not a lot of devoted CPU time, Node.js is an intelligent choice. Because Node.js is based on javascript, it works best when creating client-side applications that use the same framework. In the coming tutorials, we discuss the benefits of Node.js.

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