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Design patterns in Angular (e.g., Singleton, Factory, etc.)

Design patterns play a pivotal role in software development, guiding developers to create efficient, scalable, and maintainable code. In Angular, several design patterns empower developers to craft robust applications. Let’s delve into some prominent ones:

Singleton Pattern:

Definition: The Singleton pattern ensures a class has only one instance and provides a global point of access to it.

Implementation in Angular: In Angular, Singleton is often achieved through services. Services are singletons by default, allowing data sharing across components, and maintaining a single instance throughout the application.

Factory Pattern:

Definition: The Factory pattern provides an interface for creating objects but allows subclasses to alter the type of objects that will be created.

Implementation in Angular: Factories in Angular often involve using factory methods within services to generate instances based on specific conditions or parameters. This flexibility aids in creating objects dynamically.

Observer Pattern:

Definition: The Observer pattern establishes a one-to-many dependency between objects. When one object changes state, its dependents are notified and updated automatically.

Implementation in Angular: Angular leverages Observables, which align with the Observer pattern. Observables facilitate handling asynchronous data streams, allowing components to subscribe and react to changes.

Decorator Pattern:

Definition: The Decorator pattern adds behavior to objects dynamically without altering their structure, providing a flexible alternative to subclassing.

Implementation in Angular: Decorators are widely used in Angular for various purposes. For instance, the @Component decorator enhances a TypeScript class with metadata, specifying it as an Angular component.

Strategy Pattern:

Definition: The Strategy pattern defines a family of algorithms, encapsulates them, and makes them interchangeable.

Implementation in Angular: In Angular, strategies are often employed through dependency injection. Components can utilize different services based on interfaces, enabling interchangeable behaviors without modifying the component itself