How to think in blueprints and objects — and write code that scales.

For a while, I wrote JavaScript the only way I knew: functions and variables scattered across a file, doing things step by step. It worked for small scripts, but the moment a project got bigger — more features, more data, more logic — the code turned into spaghetti. Functions everywhere, no clear structure, and I kept asking myself: "Where does this piece of logic belong ?"

That's when I learned about Object-Oriented Programming (OOP) , and it changed how I think about code. Instead of organizing by what the code does , I started organizing by what the code represents .…