Node JS

Node JS

 💥 Node Js is an open source, Cross-platform run time environment for developing server-side and networking applications. This applications written in Javascript , and can be run within the Node.js run time on OS X, Windows.

• NodeJS Developed by Ryan Dahl. it created with the aim of creating real-time websites with push capabilities. it runs the V8 Javascript Engine, the core of google Chrome, outside of the browser. It is app is run in a single process , without creating a new thread for every request. Node.js provides a set of asynchronous I/O primitives in its standard library that prevent Javascipt code from blocking and generally, libraries in Node.js are written using non-blocking paradigms, making blocking behavior the exception rather than the norm.

        Now we are going to see about the features of the NODE.JS 👇

Features of Node.js

• Very Fast:- Being built on Google Chrome V8 JS Engine, Its library is very fast in code execution.

• Asynchronous and Event Driven :-  All APIs  of Node.js library are asynchronous ,that is non-blocking, It essentially means a Node.js based server never waits for an API to return data. The server moves to the next API after calling it and a notification mechanism of Events of Node.js helps the server to get a response from the previous API call.

•  No Buffering :- Its applications never buffer any data.

• License:- Node.js is released under the MIT license.

Who uses Node.js? 🤔

• Some Well-known Resources says that following application are using Node.js

      eBay, PayPal,Uber,Yahoo and Yammer etc

Advantages Of Node.js 😀

• Ability to use single programming language from one end of the application to the other hand.

• Support for common tools like Unit Testing.

• Performance increased via caching modules into memory after the first use.

• Easily extensible.

• NodeJs applications are easy to scale both horizontally and vertically.

Disadvantages Of Node.js 

• Not suitable for computationally intensive tasks.

• Asynchronous programming model is complex and synchronous model.

• Even though there are Number of libraries available , the actual number of robust libraries is comparatively low. 

  

Hello World in Node.js using WebStrom 🏃

• Check the node version of the machine by using following command

               node -v

• Create a new project and named it (In my case it is NodeJS)

•  Create a file named HelloWold.js

•  Add a console.log command to print the String message.

              console.log('Hello World');

• Open the cmd navigate your project path 

               cd<your project-path>

• Now enter the following command in the cmd and see the output is there.

               node HelloWorld.js

Use OS system Library

1. Import the OS system Module to your file

              const os=require('os');

    

     2. Obtain System Architecture, platform and number of CPU's from the OS module   and print them to the console.

          console.log('OS :'+os. platform());
          console.log('CPU :'+os. cpus().length);
          console.log('Architecture :'+os. arch());

3. Run application and check the output.

Node Js is a very powerful javascript based platform built. I touched here a very basic knowledge and stuffs about the Node.js. I hope it might be useful some how for the beginners.

Feel free to share your feedback and comments below.

Thank you for being here and keep Reading.... 😃✌