Async

Why Node.js is Single-Threaded Node.js is often described as a single-threaded runtime, and that’s true — but with some important details. To understand why, let’s look at JavaScript and the event loop mechanism. Why a Single Thread? JavaScript was originally designed to run in the browser’s single thread, to avoid complexity with the DOM and race conditions. Node.js inherits this principle: one thread for executing JavaScript code. This means only one piece of JS code executes at a time. ...