The Real Reason Behind Arrow Functions in JavaScript

The Real Difference Between Normal Functions and Arrow Functions (Node.js) I’ve watched a lot of explanations about arrow functions on YouTube, and almost all of them say the same thing: “they’re just shorter functions.” That explanation feels incomplete, and honestly, a bit misleading. The problem is, it focuses only on syntax and ignores what actually changes under the hood. In JavaScript, functions are not just reusable code blocks—they also define an execution context, and a big part of that context is this . With normal functions, this is dynamic. It is not fixed when you write the function. Instead, it is decided later, at the moment the function is called. That means the same function can behave differently depending on how it is invoked. Arrow functions change this behavior completely. They do not create their own this at all. Instead, they capture this from the surrounding scope at the time they are created, and that value never changes. So the real difference is not about sho