MVVM
Analyze the principle of vue implementation and implement mvvm
...The code favors clarity over performance, exposing concepts such as property interception, change notification, and view updates in a few readable modules. Because it mirrors ideas found in larger frameworks, it’s an excellent teaching aid for developers who want to understand why features like computed properties and watchers behave as they do. It is not intended as a production framework; instead, it’s a compact lab for learning the principles behind MVVM and modern reactive libraries.