viewor

Viewor is a cross-platform user interface framework and rendering engine designed to manage and render views in applications. It emphasizes modular composition, a clean separation between data and presentation, and a minimal core that can be extended through plugins and adapters. The project aims to provide a consistent development model across web and native targets, enabling developers to define UI structures as reusable components and to express state changes through a reactive data flow.

Key concepts in viewor include a component-based architecture where views are built from hierarchical components, a declarative syntax for defining layouts, and a lifecycle that automates mounting, updating, and unmounting of views. Viewor uses a virtual rendering layer to optimize updates, with support for two-way data binding and event handling. The framework offers a core rendering engine, platform adapters for rendering targets, and a plugin system for styling, accessibility, and motion.

In typical usage, developers define components and their properties, compose them into view hierarchies, and mount the root view to a target container. State is managed via a central store or local component state, with changes triggering incremental re-renders. Viewor provides utilities for navigation, state persistence, and accessibility hooks, along with integration points for routing and data sources.

Development and reception: Viewor is maintained by an open-source community and has selective adoption in experimental projects and educational contexts. Proponents cite its simplicity, transparent data flow, and extensible architecture, while critics note a smaller ecosystem and fewer production-grade integrations compared with established frameworks.