How Node.js Works Behind the Scenes (HTTP, Libuv, and Event Emitters)

When working with Node.js, most people just learn how to use it to build apps or run servers—but very few stop to ask how it actually works under the hood. Understanding the inner workings of Node.js helps you write better, more efficient code. It also makes debugging and optimizing your apps much easier. A lot of developers think Node.js is just "JavaScript with server features". That’s not entirely true. While it uses JavaScript, Node.js is much more than that. It includes powerful tools and libraries that give JavaScript abilities it normally doesn't have—like accessing your computer’s file system or handling network requests. These extra powers come from something deeper happening behind the scenes, and that's what this blog will help you understand.