patterns-behavioral

What problem does it solve?

Behavioral design patterns help manage algorithms and collaboration without turning code into nested conditionals and tight coupling. They enable routing requests, encapsulating actions, and swapping behavior safely in long-lived systems.

Core Features & Use Cases

• Strategy, Observer, State, Command, Chain of Responsibility, Mediator, Template Method, Iterator, Memento, and Visitor patterns to structure behavior.
• Use cases include pluggable pipelines, event-driven flows, state machines, middleware, undo/redo, and cross-cutting coordination in enterprise apps.
• Real-world example: implement a request router that can switch algorithms at runtime using Strategy and coordinate components via Observer.

Quick Start

Create a small TypeScript module that demonstrates Strategy and Observer patterns in a simple pub/sub workflow.