How Node.js Handles Multiple Requests with a Single Thread

A simple, visual guide to the event loop, concurrency, and why Node.js scales so well. Imagine you visit a coffee shop website. You click "Order". Behind the scenes, the server receives your request, checks the menu database, calculates the price, maybe sends a confirmation email — all at the same time as 500 other customers are doing the exact same thing. How does Node.js handle all of this with just one thread? Let's find out.