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Node.js is a cross-platform, open-source JavaScript runtime framework that allows JavaScript code to be executed outside of a web browser. Node.js allows developers to utilize JavaScript to create command line tools and server-side scripting, which is the process of running scripts on the server to generate dynamic website content before sending the page to the user's browser.


Advantages of Node.js include:

• Asynchronous and Event-Driven: All API functions in Node.js are asynchronous, meaning that they return at once without waiting for other processes to finish. This makes Node.js very efficient and scalable. Event-driven programming additionally makes it simple to design code that responds quickly to user interaction.

• Single-Threaded but Highly Scalable: Node.js uses a single-threaded, event-driven architecture that is very efficient but can be challenging to write code for. However, Node.js is very scalable because it can handle many concurrent connections with extraordinarily little overhead.

• Fast: Node.js is built on Google's V8 JavaScript engine, which compiles and executes code very quickly.

• Rich Library of modules: Node.js has a rich library of modules that make it easy to add functionality.