Node.js Tutorial - Learn Node.js from Scratch

The IT job market right now is booming for JavaScript: giving us a reason to yet again help you out through this Node js Tutorial.

• JS is generally regarded as a platform that has a bright future in the IT sector due to its usefulness and applicability.
• Users can run javascript on the server with the help of the open-source, cross-platform server environment.
• JS, Python, and JavaScript experts are in demand, and this will continue to expand, making it a booming skill to learn.

We will be discussing Node.JS to the core, but before that, we suggest you quickly have a look at the topics to be covered in this node.js tutorial for beginners:

Points to Ponder:

• What is Node.JS
• History of Node.JS
• Why Node.JS?
• Prerequisites of learning Node.JS
• Basics of Node.JS
• Features of Node.JS
• Future of Node.JS
• Conclusion
• Audience

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What is Node.JS?

• A cross-platform, open-source runtime environment for JavaScript is called Node.JS.
• It is used to create web applications that require a lot of I/O, such as single-page programs and websites that stream video.
• It offers a cross-platform runtime environment that is event-driven, non-blocking (asynchronous) I/O, and capable of supporting highly scalable JavaScript server-side applications.
• Building software and applications like chat apps and websites that require synchronous, real-time interactions are best done with Node.
• Node’s modeling approach is among the main causes propelling its acceptance.

History of Node.JS

• Ryan Dahl and other Joyent developers built Node.JS.
• Initially launched in 2009, it only supported Linux.
• Joyent Inc. sponsored Node.JS, and Joyent Inc. oversaw the project’s development and updates.
• JS comes in a variety of versions, starting with the 0.1.0 release and continuing through 0.10.x, 0.11.x, and 0.12.x.
• Its most recent version was Node.JS v0.12.9 before Node.JS and IO.JS were combined.

Why Node.JS?

• Builds the entire server-side application using JavaScript.
  • A minimally-loaded framework with all the necessary modules.
  • Depending on an application’s requirements, additional modules can be added.
• Highly Extensible
  • Given that Node.JS is well known for being highly extensible, users can further customize and extend it to meet their needs.
• Simple to Learn
  • Most front-end developers are proficient in JavaScript because it is one of the most widely used programming languages. Beginning to use Node.JS at the backend is much simpler for them.
  • JS takes less time to work with.

Prerequisites of learning Node.JS

• CLI:
  • A text-based user interface called a command line interface, or CLI for short, allows you to type commands into it to instruct your computer to carry out specific tasks.
  • You will be able to run nvm, npm, and execute your Node.JS projects with ease once you become accustomed to using CLI.
• NPM:
  • NPM, which stands for Node Package Manager, is another acronym that will be helpful for managing the server-side dependencies of our Node.JS projects.
  • When required, installing, removing, or upgrading JavaScript packages or modules is simple with NPM.
• HTTP Requests:
  • As you become more familiar with Node.JS and realize that it is also used in the back-end, there will be times when you must send or retrieve data from a data source.
  • In these situations, you must send an HTTP API request to the server in question.

Basics of Node.JS

There are some basic terminologies that you should get familiar with, like:

How many primitive types exist in Node.JS?

The list here shows the primitive types in Node.JS:

• Null
• RegExp
• String
• Boolean
• Undefined
• Number

• Loose typing

Similar to JavaScript in browsers, Node.JS JavaScript supports loose typing.

Any type of variable can be declared using the var keyword.

• Object Literal

JavaScript in browsers uses the same object literal syntax.

• Functions

Similar to the JavaScript used in browsers, functions are treated as first-class citizens in Node.

Attributes and properties are also possible for functions.

In JavaScript, it can be used like a class.

• Process Object

Node.JS scripts execute within processes, which are objects.

It contains a process object that allows you to access all the details of the Node.JS application’s running processes.

• Buffer

Unlike JavaScript in browsers, Node.JS has an additional data type called Buffer.

The primary purpose of a buffer is to hold binary data while reading from a file or receiving packets over the network.

Features of Node.JS

• Efficient:
  • Being based on the V8 JavaScript Engine in Google Chrome, the Node.JS library executes code incredibly quickly.

• No Buffer:
  • Node.JS applications never use a buffer to store data. Simply put, these programmes produce the data in sections.

• Highly Scalable:
  • JS uses event looping in a single-threaded design, which greatly enhances its scalability.
  • Event mechanisms allow the server to reply in a non-blocking way and boost server scalability, in contrast to standard servers that only generate a small number of threads to process requests.

Future of Node.JS

• JS provides a strong foundation for a variety of tasks like:
  • Integration of non-web frameworks with serverless systems.
  • Creation of portable mobile applications, and the delivery of services on a small scale.
• The IT sector has long demanded a high degree of adaptability and utility.
• Include quick execution, enhanced flexibility, and good memory utilization.
• Employing Node.JS developers is therefore a smart move for businesses.
• Designers can create an amazing client experience with an intuitive user interface and smoother navigation thanks to the powerful server-side JavaScript.

Conclusion

Node.JS offers developers greater benefits. More significant is the fact that it has broadened the scope of JavaScript applications and can now be used for both front- and back-end servers.

Recommend Audience for this Node.js Tutorial

• The intention of this lesson is to assist both professionals and individuals who are eager to learn Node. JS.
• Everything you have to do is carefully study this guide from start to finish and make note of the ideas you think are key.
• Working from inception, we attempted to cover everything in an organized manner.
• You will possess a fundamental understanding of what Node.JS is, why we use it, where it may be used, and much more by the end of this session.
• Keep reading the next chapter of the Node js tutorial to learn more!

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