What is Node.js and why is it so popular?
One of the main reasons for Node.js' popularity is its ability to handle multiple requests concurrently using an event-driven, non-blocking I/O model. This makes it perfect for building real-time, data-intensive applications that can run across distributed devices. For example, Node.js is commonly used for building server-side APIs for web and mobile applications, real-time messaging and collaboration tools, and online gaming platforms.
Another reason for Node.js' popularity is its large ecosystem of open-source libraries and frameworks on NPM. This means that developers can easily find and use pre-existing code to build new applications quickly and efficiently. For example, popular frameworks like Express and Hapi make it easy to create web servers and APIs, while tools like Socket.io and WebSockets enable real-time, bi-directional communication between clients and servers.