TypeScript 2.x By Example

Decorator design pattern

The decorator design pattern is one of the structural patterns that allows us to extend the functionality of a class without modifying the class. This is achieved by creating a separate class and wrapping the main class with this new class, which allows us to add new functionality. This pattern allows us to make sure we are able to follow the single responsibility principle with our classes. Our classes can continue to focus on their primary responsibility, and any new functionality that needs to be added can be added using a decorator that would be triggered when the class is initialized. Because the logic of the decorator class gets executed at the time of creation of the object, the decorator pattern allows us ...