What is Node.js?

Node.js is a runtime environment that allows you to execute JavaScript code outside of a web browser. It's built on the V8 JavaScript engine, which is the same engine that powers Google Chrome, and enables server-side scripting using JavaScript.

Here are some key points about Node.js:

• Event-Driven Architecture: Node.js uses an event-driven, non-blocking I/O model, making it highly efficient and suitable for real-time applications.

• Single-Threaded: Despite being single-threaded, Node.js can handle many simultaneous connections efficiently through its asynchronous nature.

• NPM (Node Package Manager): Node.js comes with NPM, a vast ecosystem of open-source libraries and packages that developers can use to build their applications.

• Use Cases: Node.js is commonly used for building web servers, RESTful APIs, real-time chat applications, and microservices. It’s also popular for tools like task runners, package managers, and more.

• Cross-Platform: Node.js is cross-platform, meaning it can run on various operating systems like Windows, Linux, and macOS.