What is Model-View-ViewModel (MVVM)?

Model-View-ViewModel (MVVM) is a software architectural pattern that facilitates the separation of the development of the graphical user interface (GUI) from the development of the business logic or back-end logic (the data model). The view model is a value converter, meaning it is responsible for exposing (converting) the data objects from the model in such a way that objects are easily managed and presented in the view. The view is bound to properties on the view model, which in turn exposes data from the model. This pattern is commonly used in modern UI development frameworks like WPF, Xamarin, and Angular.