What is Node JS? Why and When to Use Node js?

What is Node js?

Node js is an open-source and cross-platform JavaScript run-time environment with the help of which you can execute JS code in your browser. With this help, you can create a dynamic web page. Companies like GoDaddy, Groupon, IBM, LinkedIn, Microsoft, Netflix, PayPal, SAP, Voxer, Walmart, and Yahoo can also use it today. Now we first understand open source. Open-source means that any person can use it, And no one needs permission to use it. You can install and use Node js directly.

Now talking about the Server Environment, it creates an environment to run JavaScript in the server. You can use JavaScript as a server-side language in Node js. This means that you will use JavaScript in both the frontend and backend.

Definition:

Node js is a JavaScript runtime built on Chrome’s V8 JavaScript Engine.

Node js is JavaScript running on the server.

Now we try to understand the definition of Node js:

Runtime environment means that you create an environment to run the programming. As your Text editor also creates a runtime environment, To run any program. Similarly, Node js also creates a runtime environment to run JavaScript. And that code is run by Chrome’s V8 JavaScript Engine.

Now your question arises what is Chrome’s V8 JavaScript Engine?

You will get the answer to this question further.

History of Node js

It was made by Ryan Dahi on May 27, 2009. Nodejs are built in C, C ++, JavaScript. It can also be used in OS like Linux, macOS, Microsoft Windows, SmartOS, FreeBSD, OpenBSD, and IBM AIX. This was in 2009 when Ryan Dahl came up with an idea to create a language that could be used in both frontend and backend. For this purpose, he started working on JavaScript. Now if any language is to be run on the server, then it requires an engine. For example, if you have read PHP, then you will know that PHP runs on an Apache webserver. If you have ever worked on localhost in PHP, You will know that we use XAMP or WAMP software to work locally. Which gives us by creating a local server. Similarly, to run JavaScript, one has to use a web server or web engine. It is not just about PHP and JavaScript that the web engine is used for these. A web engine is also used for every language such as C, C ++, HTML, CSS. Through a web server or web engine, we can convert the code into machine code (101010). Now it comes to how many types of web engines are there in JavaScript? The web engine is used to run the language in every web browser. For example, the V8 engine is used to run JavaScript in Chrome. If you talk about Firefox, then the Spider Monkey engine is used in it. And talk about Safari, then Nitro engine is used to run JavaScript in it. Actually, the node js combination is C ++ and google’s V8 engine.

Why use Node js?

There are many benefits of its use, due to which its use has started to be very high. We are telling you below about why we should use it. Node js uses Asynchronous Programming. This language is non-blocking. We try to understand this through an example. Suppose you request to fetch any data through node js. Now suppose that it takes 10 seconds time for that request to come. At the same time, if you make another request, it will take 5 seconds time. Now, what do you think that like PHP it will wait for the first 10-second request, then after that it will come to 5 seconds. No node js doesn’t do this strongly. In Node js, the request which takes less time comes first. If you send a request of 5 seconds after the first 10-second request in PHP. It will take PHP 15 seconds to fetch this data. And first, if the request of 10 seconds is done then the result of the same will come first in the output. After that, the result of the 5-second request will come. Talk about node js at the same time, with the request of 10 seconds, the request of 5 seconds will also be fetched. And it can handle many requests at one time. In the Node js, the first 5-second output will come first, followed by the 10-second output. The speed of fetching data of Node js is high.

• Through Node js, you can generate dynamic page content.
• Through this, you can create, open, read, write, delete and close the file, etc.
• For Node js, you can add, delete, modify data in your database.
• With this help, you can create an ultra-fast application.
• It can be used to create server-side applications.
• Performing CRUD operations on File and Database servers is very easy.
• It is also very easy to learn.
• With its help, you can handle your project easily.
• In this, you can also create your own custom modules and use them in your project.

When to use Node js?

• Data Streaming Applications
• Real-time chat applications

Data Streaming Applications

Data streaming applications are applications that are used for streaming. Like Youtube, Amazon Prime, Netflix, etc.

Real-time chat applications

These are the applications that are used for live chat.

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