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TypeScript Design Patterns by Vilic Vane

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Adapter Pattern

Adapter Pattern connects existing classes or objects with another existing client. It makes classes that are not designed to work together possible to cooperate with each other.

An adapter could be either a class adapter or an object adapter. A class adapter extends the adaptee class and exposes extra APIs that would work with the client. An object adapter, on the other hand, does not extend the adaptee class. Instead, it stores the adaptee as a dependency.

The class adapter is useful when you need to access protected methods or properties of the adaptee class. However, it also has some restrictions when it comes to the JavaScript world:

  • The adaptee class needs to be extendable
  • If the client target is an abstract class other than pure ...

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