What Is Node.js: It's Not as Difficult as You Think

Node is a runtime constructed on Chrome’s V8 JavaScript engine. It is essentially writing JavaScript for the server-side. It is designed for constructing scalable network programs. Node makes use of an event-driven, non-blocking model that makes it light-weight and efficient.


It permits us to CRUD and easily communicates with a database. CRUD stands for creating, read, replace and delete.

Node.Js is supposed to run on a committed HTTP server and to rent a single thread with one system at a time. Node.Js packages are occasion-based and run asynchronously. Code constructed on the Node platform does now not follow the conventional version of receive, manner, send, wait, receive. Instead, Node techniques incoming requests in a constant event stack and sends small requests one after the alternative without looking forward to responses.


This is a shift far from mainstream fashions that run larger, more complex approaches and run several threads concurrently, with every thread watching for its suitable response before transferring on.

Node.Js came into existence whilst the original developers of JavaScript prolonged it from something you can handiest run in the browser to something you can run on your device as a standalone application.

Now you may do much greater with JavaScript than simply making web sites interactive.

JavaScript now has the functionality to do things that different scripting languages like Python can do.


Why Node.Js?

Here’s a proper definition as given at the official Node.Js website:

  • Node.Js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine.
  • Node.Js makes use of an event-driven, non-blocking off I/O version that makes it lightweight and efficient.
  • Node.Js’ package environment, npm, is the biggest atmosphere of open supply libraries within the world.

We already discussed the primary line of this definition: “Node.Js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine.” Now let’s understand the alternative two lines so we can discover why Node.Js is so popular.

I/O refers to input/output. It can be whatever starting from reading/writing local documents to creating an HTTP request to an API.

I/O takes time and therefore blocks other functions.

Consider a situation where we request a backend database for the info of user1 and user2 after which print them at the screen/console. The response to this request takes time, but each of the user data requests can be completed independently and at the identical time.
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Installing Node.Js


You have to install Node.Js from their professional internet site at nodejs.Org. If you are the usage of Windows, Mac OS or Linux, you may get precompiled binaries and installers. The best way to head is by using an installer.

When you install Node.js, you get node and npm binaries added to your path. That means, now you can use node and npm command. We will talk about npm later, but for now, let’s focus on the node.
Using -v or --version flag, we can check the version of the Node installed. The latest node will have the latest V8 engine, hence the latest JavaScript features. If you need the flexibility to change the Node version at any given time, in that case, you should not install Node.js using the above method. Instead, you should use Node Version Manager or NVM.
Here is the list of Node.js releases with V8 engine versions.
Like we saw in DevTools of the browser, using the simple command will open a JavaScript interpreter in the terminal. This way we can run some simple JavaScript code to amuse yourself. 
If you want to learn more about Node.js, then The Complete Node.js Course is a great course, to begin with.  
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