TypeScript Design Patterns Examples

This repository contains practical examples of common design patterns implemented in TypeScript. Each example is designed to be simple, understandable, and relevant to real-world web development scenarios.

Getting Started

1. Clone the repository
2. Install dependencies

  npm install

3. Run any pattern example using the npm scripts

  npm run design-pattern:<pattern-name>

Available Patterns

1. Factory Pattern (Creational Pattern)

Demonstrates object creation through a notification system, showing how to create different types of notifications (email, SMS, push) using a common interface.

  npm run design-pattern:factory

2. Singleton Pattern (Creational Pattern)

Shows how to ensure a single instance of a database connection is shared across the application.

  npm run design-pattern:singleton

3. Adapter Pattern (Structural Pattern)

Illustrates how to make incompatible interfaces work together using payment provider integration as an example.

  npm run design-pattern:adapter

4. Decorator Pattern (Structural Pattern)

Demonstrates how to add new behaviors to objects dynamically using logging and performance measurement examples.

  npm run design-pattern:decorator

5. Repository Pattern (Data Access Pattern)

Shows how to abstract data access logic using a simple user management system.

  npm run design-pattern:repository

6. Observer Pattern (Behavioral Pattern)

Shows how objects can notify other objects of state changes using a weather station example with multiple displays.

  npm run design-pattern:observer