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What is Node.js?
Node.js is an asynchronous I/O event-driven architecture that optimizes scalability and throughput of web applications with multiple I/O operations as well as enhances real-time web applications. As such, Node.js is the application of the same language to eliminate “translation” between different language sets between the client and the server.
Node.js was created by Ryan Dahl in 2009. He devised the concept when he saw that a file upload progress bar on Flickr didn’t know how much of the file had been uploaded and this required the use of a query the Web server. Dahl decided that there had to be an easier way for clients and servers to talk to each other.
Node.js is found in many leading sites that have ultra-high traffic, and these include LinkedIn, Microsoft, Netflix, PayPal, GoDaddy, Groupon, IBM, Walmart, Rakuten, Yahoo! and more.
Rather than make things up, I will directly quote the Node.js site:
Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.
Node.js’ package ecosystem, NPM (node package manager), is the largest ecosystem of open source libraries in the world.
Node.js eliminates I/O blocking since it uses the same language and syntax, both sides of the equation are written in the same language and do not need a translator in the middle.
Node.js is modular, now everyone claims to be modular, but Node.js is a module system, you create blocks of code that are self-contained modules and can integrate them anywhere and without installation issues.