Decorator Pattern

What is the decorator pattern?

The decorator pattern focuses on adding properties, functionalities, and behavior to existing classes dynamically. The additional decoration functionalities aren’t considered essential enough to be a part of the original class definition as they can cause clutter. Hence, the decorator pattern lets you modify the code without changing the original class.

Unlike the creational patterns, the decorator pattern is a structural pattern that does not focus on object creation rather decoration. Hence, it doesn’t rely on prototypal inheritance alone; it takes the object and keeps adding decoration to it. This makes the process more streamlined. Let’s take a look at an example to understand this concept better.

Example