what is nodejs Node.js

Node.js (or simply Node) is an open-source, cross-platform, back-end JavaScript runtime environment. It is built on the V8 JavaScript engine (which also powers Google Chrome) and provides an event-driven, non-blocking I/O model that makes it well-suited for building scalable, high-performance network applications.

Node.js allows developers to use JavaScript not just in the browser, but also on the server side. It provides access to the file system, network sockets, and other low-level APIs, making it possible to build web servers, APIs, command-line tools, and other types of applications with JavaScript.

Node.js has a vast ecosystem of modules and packages available through the npm (Node Package Manager) registry, which provides a wealth of reusable code for building applications. It has gained widespread adoption among developers and is used by many large companies such as Netflix, LinkedIn, Walmart, and PayPal.