reveal.js is a web-based presentation framework for creating interactive HTML slide decks. It provides core presentation functionality including slide navigation, fragments, themes, transitions, and multimedia support through a modular architecture. The system consists of a core Reveal.js class that manages presentation state, specialized controllers for features like keyboard input, fragments, and slide content, and a plugin system for extending functionality (e.g., markdown, math, notes, zoom). The framework is distributed as an npm package with UMD, ESM, and TypeScript definitions, and includes a React wrapper for component-based usage. The architecture follows a modular controller pattern where each presentation aspect (keyboard, fragments, progress, etc.) is handled by a dedicated controller class with bind/unbind lifecycle methods. Plugins register initialization and destruction methods through a centralized plugin manager. The React wrapper encapsulates reveal.js functionality into reusable components (Deck, Slide, Stack, Fragment) with a useReveal hook for API access. Build processes use Vite and TypeScript for modern bundling, with separate configurations for core, plugins, and themes. The codebase demonstrates strong engineering practices: clear separation of concerns, isolated utility modules (color conversion, device detection), comprehensive TypeScript definitions, and extensive test coverage. Recent commits indicate active maintenance, and the project maintains compatibility with modern web standards while avoiding legacy dependencies. The plugin system and utility modules exhibit high reusability potential for extraction into other projects.
Reagent is a ClojureScript library that provides a minimal, efficient interface to React, enabling developers to define UI components using Hiccup-like vectors and manage state with reactive atoms. The library's architecture centers around three core concepts: reactive atoms (ratoms) for state, a Hiccup-to-React element compiler, and lifecycle macros like `with-let` and `defc`. Under the hood, Reagent implements its own reactive state management system (RAtom, RCursor, Reaction) that triggers automatic re-rendering of components when dereferenced state changes. The codebase demonstrates deep integration with React internals, including support for hooks, contexts, fragments, portals, error boundaries, server-side rendering, and concurrent mode. It is fully compatible with both React 18 and 19, and provides a seamless interop path with existing React libraries via `adapt-react-class` and `:>` syntax. The test suite is comprehensive, covering functional components, lifecycle behavior, reactive updates, and performance benchmarks. While primarily a UI library, the reactive state management components are designed with sufficient abstraction to be studied as a standalone pattern for reactive programming in ClojureScript.