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TypeScript Design Patterns

You're reading from  TypeScript Design Patterns

Product type Book
Published in Aug 2016
Publisher Packt
ISBN-13 9781785280832
Pages 256 pages
Edition 1st Edition
Languages
Author (1):
Vilic Vane Vilic Vane
Profile icon Vilic Vane

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 interface, you can't extend the adaptee class and the client target with the same adapter class without a mixin

  • A single class with two sets of methods and properties could be confusing

Due to those limitations, we are going to talk more about object...

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