Node.js has a unique advantage because millions of frontend developers that write JavaScript for the browser are now able to write the server-side code in addition to the client-side code without the need to learn a completely different language. This allows Node.js to handle thousands of concurrent connections with a single server without introducing the burden of managing thread concurrency, which could be a significant source of bugs. When Node.js performs an I/O operation, like reading from the network, accessing a database or the filesystem, instead of blocking the thread and wasting CPU cycles waiting, Node.js will resume the operations when the response comes back.

Node.js provides a set of asynchronous I/O primitives in its standard library that prevent JavaScript code from blocking and generally, libraries in Node.js are written using non-blocking paradigms, making blocking behavior the exception rather than the norm. This allows Node.js to be very performant.Ī Node.js app runs in a single process, without creating a new thread for every request. Node.js runs the V8 JavaScript engine, the core of Google Chrome, outside of the browser.

It is a popular tool for almost any kind of project! Node.js is an open-source and cross-platform JavaScript runtime environment.

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