Learn Decorator Pattern — a key concept for LLD interviews.
Interactive — Try it yourself!
How to use
1Select "Decorator" tab — see a base coffee ($3)
2Toggle +Milk, +Caramel, +Whip — price updates live
3Watch visual layers stack on the coffee cup
4Each decorator wraps the previous one — composable!
In a nutshell
Decorator Pattern adds behavior to objects dynamically by wrapping them. Like coffee toppings — each adds to the base without modifying it. More flexible than inheritance for combining behaviors.