Everything To Know About Nodejs

By Author: srivasskillslash
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While several activities take place in the background or the backend of our website, the user only really interacts with the front end of any program, not the backend. Any program essentially consists of three components: the front end, with which users interact, the back end server, and the back end database. We can utilize relational or non-relational databases for backend databases, and NodeJS, Java, Python, etc. for backend servers.
What is Node js?
We’ll look into what Node js is.
Every time a client uses the client side of an application to request something, the request is first sent to the server, where it is processed or calculated to validate the client-side request. Once all of this validation is complete, a response is then provided to the client side. This NodeJs JavaScript framework is used for all of these calculations and processing. NodeJS is essentially utilized as an open-source and cross-platform JavaScript runtime environment for our web apps that are run outside of the client's browser. This is what we use to run server-side apps. It is employed in developing I/O-intensive applications, ...
... including those for online chat, video streaming, and other uses. NodeJs is a framework that is used in many well-established tech major corporations and recent start-ups.
What is the Need for NodeJs?
NodeJs is constructed using the V8 engine from Google Chrome, which results in an extremely speedy execution time. NodeJs is highly helpful for developing real-time and data-intensive web apps because it does not require waiting for an API to return data. Because of its wholly asynchronous nature, it is completely non-blocking. Due to greater code synchronization between the client and server due to sharing the same code base, NodeJs speeds up the loading time for audio and video files. Since NodeJs is open-source and is merely a JavaScript framework, beginning the development of projects with it is quite simple for developers who are already familiar with JavaScript.
Components of NodeJs
Modules
A Node.js application can use modules, which are essentially JavaScript libraries, to include a collection of functions. Use the require() function with the module name in the parenthesis to include a module in a Node.js application.

Consoles
The console is a module that offers a debugging technique that is comparable to the fundamental JavaScript console offered by web browsers. Messages are printed to stderr and stdout.
Clusters
The foundation of Node.js is single-threaded programming. A module called Cluster enables multi-threading by generating child processes that simultaneously run on the same server port and share the same server.
Global
In Node.js, all modules have access to global objects. These items include strings, modules, functions, and more.
Error Handling
There are four types of errors in NodeJs. They are listed below.
i)Standard JavaScript Libraries
ii) System Errors
iii) User-Specific Errors
iv) Assertion Errors
Streaming
The process of reading or writing data continuously by Objects is called Streaming. The four types of streams are listed below:
i) Readable
The process of reading data from streams is called Readable Streams.
ii) Writable
These are the streams that can be used to write data.
iii) Duplex
Both Readable and Writeable data streams are called Duplex Streams.
iv) Transform
Streams that let data manipulation while being read or written are called Transform Streaming.
Buffer
A module called Buffer enables the handling of streams with just binary data.
Domain
Errors that go unhandled are intercepted by the domain module. These mistakes are stopped using two techniques:
Internal Binding: The run function is where the code for the error emitter is executed.
External Binding: Using the add method, an error emitter is explicitly added to a domain.
DNS
This module is used to connect to the DNS server and solve the name resolution problem.
Debugger
A built-in debugging client can use the debugging tool that is part of Node.js. Although the Node.js debugger is not feature-rich, it does provide basic code inspection. By placing the 'inspect' keyword before the name of the JavaScript file, the debugger can be used in the terminal.
Conclusion
In this article, we have discussed the definition of NodeJs, the components of NodeJs, and the need for NodeJs. NodeJs is used as a Front-End framework, and also as a Back-End framework. Front-End, and Back-End frameworks, both form the backbone of Full Stack. And hence, the need for Full Stack Developers to upskill himself/herself with Full Stack technologies. Full Stack developers are in great demand by top product-based organizations. Where can a candidate equip himself/herself with the right skillset relating to Full Stack? There are many institutes in our country that train candidates in the domain of Full Stack, but at SkillSlash, an online based learning platform, candidates are provided 1:1 mentorship and are made to work on live projects. Skillslash also has in store, exclusive courses like Data Science Course In Bangalore, Full Stack Developer Course and Data Structure and Algorithm and System Design Course to ensure aspirants of each domain have a great learning journey and a secure future in these fields. Skillslash has developed a massive online presence in other domains too. To find out how you can make a career in the IT and tech field with Skillslash, contact the student support team.

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