JS-design-patterns

# JavaScript Design Patterns

- Creational Patterns
- Structural Patterns
- Behavioral Patterns

## Links

- <https://www.dofactory.com/javascript/design-patterns>
- <https://sourcemaking.com/design_patterns>

## Creational Patterns

- `Abstract Factory` Creates an instance of several families of classes
- `Builder` Separates object construction from its representation
- `Factory Method` Creates an instance of several derived classes
- `Prototype` A fully initialized instance to be copied or cloned
- `Singleton` A class of which only a single instance can exist

## Structural Patterns

- `Adapter` Match interfaces of different classes
- `Bridge` Separates an object’s interface from its implementation
- `Composite` A tree structure of simple and composite objects
- `Decorator` Add responsibilities to objects dynamically
- `Facade` A single class that represents an entire subsystem
- `Flyweight` A fine-grained instance used for efficient sharing
- `Proxy` An object representing another object

## Behavioral Patterns

- `Chain of Resp.` A way of passing a request between a chain of objects
- `Command` Encapsulate a command request as an object
- `Interpreter` A way to include language elements in a program
- `Iterator` Sequentially access the elements of a collection
- `Mediator` Defines simplified communication between classes
- `Memento` Capture and restore an object's internal state
- `Observer` A way of notifying change to a number of classes
- `State` Alter an object's behavior when its state changes
- `Strategy` Encapsulates an algorithm inside a class
- `Template` Method Defer the exact steps of an algorithm to a subclass
- `Visitor` Defines a new operation to a class without change