What are the best web application design patterns for code reusability?

1 MVC Pattern

MVC stands for Model-View-Controller, and it is one of the most popular and widely used web application design patterns. It separates your code into three layers: the model, which handles the data and business logic; the view, which displays the data and user interface; and the controller, which mediates the communication between the model and the view. By separating these concerns, you can reuse your models and views across different controllers, and vice versa. You can also test each layer independently and swap them easily if needed.

2 Component-Based Pattern

Component-based pattern is another web application design pattern that promotes code reusability. It involves creating reusable UI elements, called components, that encapsulate their own state, logic, and style. Components can be nested, composed, and rendered dynamically, depending on the application state and user interaction. Component-based pattern is supported by many modern web frameworks, such as React, Angular, and Vue. By using components, you can create consistent, modular, and reusable UIs that are easy to maintain and update.

3 Service-Oriented Pattern

Service-oriented pattern is a web application design pattern that focuses on creating reusable and independent services that provide specific functionalities or data. Services are typically exposed through APIs (Application Programming Interfaces) that can be accessed by other services or clients. Services can be implemented using different technologies, languages, and platforms, as long as they adhere to a common contract or protocol. Service-oriented pattern enables you to decouple your code, improve scalability and performance, and reuse your services across different applications or features.

4 Factory Pattern

Factory pattern is a web application design pattern that helps you create objects without specifying their exact classes or constructors. Instead, you use a factory function or class that returns an instance of the appropriate class, based on some parameters or conditions. Factory pattern allows you to abstract the creation logic and reuse it across different scenarios. It also makes your code more flexible and adaptable, as you can easily change or add new classes without affecting the existing code.

5 Observer Pattern

Observer pattern is a web application design pattern that enables you to create a one-to-many relationship between an object, called the subject, and multiple objects, called the observers. The subject maintains a list of observers and notifies them of any changes in its state or behavior. The observers can then react accordingly, without being tightly coupled to the subject. Observer pattern is useful for creating dynamic and interactive web applications that respond to user events, data changes, or external stimuli. It also allows you to reuse your observers across different subjects or contexts.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?