Design Patterns

Ensures a class has only one instance with global access point

Creates objects without specifying their concrete classes

Construct complex objects step by step

Clone existing objects efficiently

Create families of related objects without specifying concrete classes

Notify multiple objects about state changes automatically

Encapsulate algorithms and make them interchangeable at runtime

Encapsulate requests as objects

Change object behavior based on internal state

Pass requests along a chain of handlers until one handles it

Define algorithm skeleton, let subclasses override specific steps

Separate algorithms from objects they operate on

Reduce coupling by centralizing complex communications

Capture and restore object state without violating encapsulation

Access elements sequentially without exposing underlying structure

Add new behaviors to objects dynamically without altering structure

Make incompatible interfaces work together

Simplified interface to complex subsystems

Control access to another object

Compose objects into tree structures to represent part-whole hierarchies

Separate abstraction from implementation to vary them independently

Share common state efficiently among large numbers of objects

Encapsulate code using closures to create private scope

Define all functions privately, then reveal selected ones publicly

Compose objects from multiple sources to achieve multiple inheritance

Process asynchronous data streams using modern iteration protocols

Create reactive objects using ES6 Proxy for automatic change detection