Introduction The Observer Pattern is a fundamental design pattern that defines a one-to-many dependency between objects, so when one object changes state, all its dependents are notified and updated automatically. This pattern is highly effective for implementing distributed event-handling systems. In the world of web development, particularly with Angular and TypeScript, the Observer Pattern plays…

In the world of software engineering, design patterns are crucial for creating robust and maintainable code. One of the most fundamental and widely used patterns is the Singleton Pattern. Originally described in the “Gang of Four” (GOF) book, this pattern ensures that a class has only one instance and provides a global point of access…