How Node.js Works Behind the Scenes

Node.js uses a complex event loop with multiple phases to handle various types of operations efficiently, unlike browsers which use a simpler task queue system. The event loop includes phases for timers, pending callbacks, polling for I/O events, and more. This design allows Node.js to prioritize different asynchronous operations, crucial for server-side applications dealing with file system access, network requests, and database queries. Understanding the event loop is essential for writing efficient backend code in Node.js.