The term «Model-View-ViewModel» (MVVM) is a software architecture pattern commonly used in the development of software applications, especially in user interface applications such as web and mobile apps. MVVM is a variant of the Model-View-Controller (MVC) pattern and focuses on separating the presentation logic from the business logic of an application.
In MVVM, the three main components are:
Example:
In this example, the UserModel represents user data, including the username and e-mail address.
Example:
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In this example, the user_profile.xml view defines the user interface to display user details, such as the username and email address.
Example:
In this example, the UserViewModel acts as an intermediary between the UserModel and the view. It provides methods to get the user data in a way that is suitable for the view.
Differences between Model-View-ViewModel and Model-View-Controller
The main difference between MVVM and MVC lies in how the presentation logic is handled and organized. In MVVM, the presentation logic is encapsulated in the ViewModel, allowing for greater separation of concerns and better code modularity. This facilitates unit testing of the presentation logic and the reuse of UI components in different parts of the application.
Technologies using Model-View-ViewModel (MVVM)
The Model-View-ViewModel (MVVM) architecture pattern is used in a variety of software development technologies, especially in user interface application development, such as web, mobile, and desktop applications.
Web technologies:
Mobile technologies:
Desktop technologies:
Multi-platform technologies:
