What is the Decorator Pattern? How does it add functionality dynamically?

Difficulty: 5/10

dynamic behavior, composition over inheritance, open/closed principle

Decorator Pattern

Decorator dynamically adds responsibilities to an object by wrapping it with another object implementing the same abstraction. It is an alternative to creating many subclasses for combinations of optional behavior. Multiple decorators can be stacked, which makes the design flexible. A common example is adding logging, caching, authorization or compression around an existing service.

javascript

1
Decorator implements the same abstraction as the wrapped object.
2
Behavior can be added without modifying the original implementation.

What is the Decorator Pattern? How does it add functionality dynamically?

Difficulty: 5/10

dynamic behavior, composition over inheritance, open/closed principle

Decorator Pattern

javascript

1
Decorator implements the same abstraction as the wrapped object.
2
Behavior can be added without modifying the original implementation.

What is the Decorator Pattern? How does it add functionality dynamically?

Decorator Pattern

What is the Decorator Pattern? How does it add functionality dynamically?

Decorator Pattern

Scenario Questions

Follow-up Questions