What is NODE JS

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)

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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

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Life after NODE JS:

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

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Why NODE JS?

• Super Fast
• Highly Scalable
• Used by Top Companies

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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🤯.

• 35% decrease in the average response time for the same page:

💥This resulted in the pages being served 200ms faster (Something Users will definitely notice).