ui1

ui1 is an open-source user interface framework designed to help developers build cross-platform applications. It provides a library of reusable UI components, a theming system, and a rendering engine that targets web browsers and native platforms from a single codebase.

The project was initiated by a community of developers known as the ui1 Initiative and released publicly in 2017. Governance is community-led, with a small core team maintaining the library and separate contributors maintaining individual components and extensions.

Architecture and features: ui1 emphasizes a component-based, declarative API. Components are assembled in a hierarchical tree and rendered through a rendering abstraction that supports multiple backends. The framework includes a design system with tokens for colors, typography, and spacing, enabling consistent theming across applications. Accessibility is a stated priority, with built-in keyboard navigation patterns and ARIA guidance. A plugin and extension mechanism allows custom components and backends, and the project aims to be tree-shakeable and compatible with common build tools.

Platform support and usage: ui1 targets web environments and can be extended to native platforms through adapters. It is used by small to medium-sized projects, internal tools, and prototypes. The project provides documentation, examples, and a test suite to aid adoption.

Reception and status: As of the mid-2020s, ui1 maintains a moderate user base and an active community. It is released under the MIT License and welcomes external contributions. Ongoing development focuses on performance, accessibility improvements, and ecosystem governance.

See also: UI toolkit, design system, component-based architecture.