13 Object-Oriented Design Patterns for Node.js Developers
13 of the most popular object-oriented design patterns applied to Node.js.
Installation
The project run with Node.js. Download the Node.js source code or a pre-built installer for your platform
Usage
Download or clone the repository. Each folder has a working example of a pattern. Access the chosen pattern and run node index.js.
1: Singleton pattern
The singleton pattern is a design pattern that restricts the instantiation of a class to one object.
2: Prototype pattern
Specify the kind of objects to create using a prototypical instance, and create new objects by copying this prototype.
3: Factory pattern
Define an interface for creating an object, but let subclasses decide which class to instantiate. The Factory method lets a class defer instantiation it uses to subclasses.
4: Builder pattern
Separate the construction of a complex object from its representation so that the same construction process can create different representations.
5: Adapter pattern
Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces.
6: Proxy pattern
Provide a surrogate or placeholder for another object to control access to it.
7: Composite pattern
Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly.
8: Decorator pattern
Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.
9: Chain of Responsibility pattern
Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.
10: Command pattern
Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
11: Iterator pattern
Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.
12: Observer pattern
Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
13: Strategy pattern
Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.
Contributing
Please check out the How to contribute guide for guidelines about how to proceed.
License
This project is under MIT license. See the LICENSE file for more details.
Made with : by Diego Mais
Source: https://github.com/diegomais/node-js-design-patterns
