Design patterns are proven solutions to common problems in software development. In JavaScript, these patterns help us structure code in a modular, reusable, and maintainable way. In this chapter, we will explore some of the most common design patterns in JavaScript.

Javascript design pattern

Module Pattern

The module pattern allows for encapsulating code in a function or an object, hiding internal details and exposing only what is necessary.

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Singleton Pattern

The Singleton pattern ensures that only one instance of a class or an object exists throughout the application.

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Observer Pattern

The observer pattern allows an object (the subject) to maintain a list of dependents (observers) and notify them of changes.

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Factory Pattern

The Factory pattern is useful for creating instances of classes without exposing the creation logic to the client.

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Decorator Pattern

The decorator pattern allows for adding additional functionality to an object dynamically, without modifying its original structure.

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Strategy Pattern

The strategy pattern allows defining a family of algorithms and making the algorithms interchangeable.

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Conclusion

Design patterns in JavaScript offer elegant solutions to common problems and promote a modular and reusable architecture. By applying patterns like Singleton, Observer, and Decorator, you can improve the scalability and flexibility of your code.