Node.js

Node.js is an open-source, server-side JavaScript runtime environment that enables developers to run JavaScript on the server instead of just in a web browser. It uses an event-driven, non-blocking I/O model, making it efficient and suitable for handling many connections simultaneously. This allows for the creation of fast and scalable web applications. Developers use Node.js to build everything from web servers to real-time applications, leveraging a rich ecosystem of libraries and tools available through the Node Package Manager (NPM). Its popularity stems from its performance and the ability to use JavaScript for both client and server-side development.