Introduction
Based on the Node.js framework, Node.js is a JavaScript runtime environment. This means that we can run JavaScript outside of the browser using Node.js. In this article, let’s discuss Node JS and how it works in detail. Join Node JS Training in Chennai with Certification and Placement Support for your career advancement if you’re interested in learning more about Node Js.
What is Node JS?
Node JS is an open-source server environment. It is completely free and uses JavaScript on the server. It also runs on multiple platforms like Windows, Unix, and Linux. Node JS can generate the dynamic page content, and it also creates, opens, read, write and close the files on the server. It also modifies data in our databases.
How Does Node JS Work?
If you want to understand the working methodology of Node Js, you have to focus on three things they are,
- Node JS Architecture
- Node JS Application
- The Event Loop
Node JS Architecture
Node.js is made up of two components: the Chrome V8 engine, which is developed in C++, and Libuv, a multi-platform C library that supports asynchronous I/O based events on event loops and thread loops. It’s crucial to understand that, although We can still use Node.js in pure JavaScript because it is built with the V8 engine and Libuv, which are written in C or C++. join Node JS Course in Chennai with certification and placement support for your career enhancement.
Node JS Application
Now that we’ve learned about the Node.js architecture, it’s time to learn how a Node.js application works, which involves understanding the concept of Node.js being single-threaded and non-blocking. First and foremost, what is a thread? A thread is a set of programming instructions that can operate independently in a computer’s processor, and every process we wish to run as its own thread to run the programming instructions, and the process can have multiple threads.
However, keep in mind that Node.js applications run on a single thread, which means that whether the Node.js application is used by five people or 5 million users, it will only run on a single thread, enabling the Node.js application to be blocked. Asynchronous code must be used everywhere with callback methods to keep the Node.js application running. Because asynchronous code runs in the background, and the callback is executed as soon as the promise is resolved, whereas synchronous code blocks the entire application until it is finished executing.
However, we can still use synchronous code at some point in our program, and that point is before we join the Event-loop.
The event loop is a loop that allows Node.js applications to do non-blocking asynchronous I/O activities. All asynchronous code is handled and executed within the event loop, and before that, we can use our synchronous code, which is referred to as Top-Level code in this case.
The Event Loop
keep in mind that the event loop is where all of our asynchronous code is executed. For a moment, look back to the first paragraph and read it again since we’ll be talking about Node.js’ third feature, which is that it’s built on an event-driven architecture. The event-entire loop’s concept is based on this architecture, or these three steps, which are listed below.
- Events can be emitted by an asynchronous function, such as receiving an HTTP request, reading a file with the fileSystem module, or completing a timer. Depending on our programming, these events may differ.
- After that, they are picked up by Event-loop.
- The callback functions are used (based on your code).
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Conclusion
I hope that this blog has provided you with some useful information about Node JS. If you are interested in learning Node JS, join FITA Academy, which offers training from real-world working specialists as well as certification and job placement assistance to help you advance your career.
Also read this blog, Importance Of UI UX Design to understand why UI UX is Important.
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