Node.js is a Javascript interpreter that works on the server side and completely changes how it should work. Node.js framework uses a non-blocking and event-oriented operations model, which makes it lightweight and efficient.
Node.js developers are free to worry about the process crashing as it doesn't exist. Almost no functions in Node.js do I / O directly, so the process never hangs. Therefore, it is very conducive to develop scalable systems in Node.js.
The Node.js package ecosystem, npm, is the largest ecosystem of open source libraries in the world. It is based on the Google Javascript V8 engine, designed to run in a browser and swiftly execute the Javascript code.
Node.js framework is similar in design and influenced by systems like Ruby's Event Machine and Python's Twisted. But Node.js takes the event model a bit further. It includes an event loop as an execution runtime instead of a library.