If you’ve ever wondered whether Node.js is single-threaded or multi-threaded, you’re not alone. This is a common question for developers diving into Node.js development. The answer? Node.js is single-threaded at its core but can leverage multi-threading for certain tasks. Let’s explore this topic in detail and uncover how Node.js handles concurrency.

Node.js is built on the CommonJS (CJS) module system, which enables developers to structure their applications using modules. This modularity is achieved through the `require` function, a key feature that allows one module to load and use functionality from another. But how does `require` actually work under the hood? In this blog, we’ll explore the mechanics of `require`, look into its internal implementation, and see how Node.js loads and manages modules efficiently.