Model-View-ViewModel
Model-View-ViewModel (MVVM) is a software architectural pattern that separates the development of the graphical user interface (the View) from the business logic or back-end logic (the Model) via an intermediary component 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 the UI from the underlying data and logic. The ViewModel acts as a data binder, exposing data from the Model to the View and handling user interactions, often through data-binding mechanisms.
Developers should learn and use MVVM when building applications with complex user interfaces that require frequent updates, such as single-page applications (SPAs), desktop apps using WPF or Xamarin, and mobile apps, as it enhances code organization and reduces tight coupling between UI and business logic. It is particularly beneficial in scenarios where automated testing of UI logic is needed, as the ViewModel can be tested independently of the View, and when using frameworks that support data-binding, like Angular, Vue.js, or .NET's WPF. MVVM helps in achieving a clean separation of concerns, making the codebase more scalable and easier to maintain over time.