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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Ok! Now it’s time to know everything about Node JS Tutorial.

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.

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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.

To learn about NodeJs, you can check out our Node JS Interview Questions which involve some of the most frequently asked questions during job interviews.

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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