What is NODE JS

#javascript #computerscience #node

Top Companies Using Node Js:

NETFLIX
UBER
PAYPAL
LINKEDIN
AMAZON
NASA
WALMART
EBAY

What is NODE JS?

First of all, NODE is NOT(I repeat is NOT) a FRAMEWORK or a PROGRAMMING LANGUAGE.
NODE JS is a JAVASCRIPT RUNTIME ENVIRONMENT and it was introduced by Ryan Dahl in 2009. He used the Chrome v8 Engine which is a javascript Engine that converts javaScript Code to Machine Code.
It allow Us to Execute JAVASCRIPT outside the BROWSER.
NODE JS was written using: JavaScript,CoffeeScript,C++(wiki)

Life Before NODE JS:

JavaScript runs only inside the Browser
JavaScript was used for FrontEnd developMent only (Animation and Data Validtion).
We can't run JavaScript outside the Browser

Life after NODE JS:

We can excute JavaScript outside the browser.
JavaScript can be used for Backend Development.
More job Offer for JavaScript Developers.

Why NODE JS?

Super Fast
Highly Scalable
Used by Top Companies

Real Life examples -

STATS:- Paypal Switched from JAVA to NODE and here are the results:

🛠️DEVELOPMENT:

Built almost twice as fast with fewer people.
Written in 33% fewer lines of code.
Constructed with 40% fewer files.

⚙️PERFORMANCE:

Double the requests per second vs the Java application:

⚠️This is even more interesting because the intial performance results were using a SINGLE core for the node.js application comared to FIVE cores in java🤯.