MVVM
MVVM (Model-View-ViewModel) is a software architectural pattern that separates the development of the graphical user interface (the View) from the business logic and data (the Model) using an intermediary called the ViewModel. It is commonly used in applications with rich user interfaces, such as desktop, web, and mobile apps, to improve maintainability and testability by decoupling components. The ViewModel acts as a data binder, exposing data and commands from the Model to the View and handling user interactions.
Developers should learn MVVM when building applications with complex user interfaces, especially in frameworks like WPF, Xamarin, or Angular, as it promotes separation of concerns and makes code easier to test and maintain. It is particularly useful for scenarios requiring data binding, such as real-time updates or form-heavy applications, as it reduces boilerplate code and minimizes direct dependencies between UI and business logic. This pattern also facilitates team collaboration by allowing front-end and back-end developers to work more independently.