Hyperapp is a lightweight JavaScript framework for building web applications. It functions as a declarative state management system that synchronizes the user interface with a centralized application state.
The framework utilizes a virtual DOM to render user interfaces and reconcile changes to the browser display. It employs a subscription model to synchronize external web APIs and asynchronous events with the global state.
The system manages data through a single-state-tree architecture, where updates are handled via discrete actions and pure functions. This approach ensures that the view updates automatically whenever the underlying state changes.