Under the Hood of Asynchronous Execution

In previous lessons, we introduced asynchronous programming. Now, we’ll go under the hood to see how Node.js handles asynchronous tasks with the event loop, libuv, and the callback queue. Understanding these components helps us write efficient, non-blocking code.

Core components of asynchronous execution

When Node.js runs a file with both synchronous and asynchronous code, it coordinates execution using the following four components.: