rangi

MicroLighter is a tiny, dependency-free browser syntax highlighter developed by davatron5000. It uses TextMate grammars and the CSS Custom Highlight API to highlight code without wrapping each token in a span, keeping the DOM clean and code blocks editable. It provides programmatic and automatic highlighting APIs, an optional <micro-lighter> web component, on-demand support for 35 languages, and 10 bundled themes. It can be installed from npm or loaded from a CDN.

Sugar High is a lightweight, zero-dependency JavaScript syntax-highlighting library that runs in browsers and JavaScript runtimes and converts source code to HTML without requiring a DOM. It supports JavaScript, TypeScript, CSS, Python, C, Go, Java, Rust, JSON, Markdown, SQL, HTML, YAML, and other built-in languages and formats, with alias normalization for inputs such as filename extensions and Markdown fences. The library exposes a one-step highlight function and a composable core that separates syntax parsing from HTML rendering. Token classes can be customized with class maps or token hooks, while line-level hooks support highlighting or modifying generated lines; CSS custom properties provide theming. Its React package supplies Code and textarea-overlay Editor components, and its Remark plugin highlights fenced code blocks during Markdown processing. Sugar High also provides an opt-in experimental WebGPU entry for asynchronous, language-agnostic highlighting through gpu-lexer. It is distributed as npm packages under the MIT license, with a separate core entry for selective language configurations.

Confetti is a local Visual Studio Code extension for detecting, highlighting, and formatting more than 16 configuration-file types, including Nginx, SSH, dotenv, INI, Java Properties, TOML, YAML, Git Config, npm Config, ignore files, Hosts, fstab, and crontab. It examines file paths and content to select a language mode, and leaves ambiguous files unchanged when detection does not reach its safety threshold. Its TextMate grammars provide theme-compatible syntax highlighting. Format-specific, tokenizer-backed formatters are available for supported formats such as Nginx, SSH, dotenv, INI, TOML, Git Config, npm Config, and Hosts; formatting preserves comments, quoted content, escaped spaces, and continuation lines and is designed to be idempotent. YAML, ignore files, and tool-version files are intentionally not formatted. Confetti runs locally without an account, AI service, cloud service, network connection, or telemetry. Detection occurs when a file is opened, activated, saved, or explicitly detected rather than on every edit, and formatting runs only when requested. It requires VS Code 1.90 or later and is distributed under the MIT license.

json-render is a generative UI framework from Vercel Labs that converts natural-language prompts and structured JSON outputs into interface specifications constrained by a developer-defined catalog of components, actions, schemas, and data bindings. The catalog generates the AI system prompt and acts as a guardrail; specifications are validated against the catalog and rendered progressively through a streaming compiler. Components can use state expressions, conditional visibility, computed values, templates, actions, and state watchers. The framework provides renderers and adapters for React, Vue, Svelte, Solid, React Native, Next.js, TanStack Start, terminal UIs, Remotion video, React PDF, React Email, SVG/PNG images, and React Three Fiber, along with optional shadcn/ui components, devtools, state-store adapters, MCP Apps integration, YAML support, and code-generation utilities.

Falco is a tiny browser engine written from scratch in Rust. It parses HTML, applies CSS, executes JavaScript in a custom virtual machine with a baseline JIT compiler, loads images, computes layout, and paints the result to a canvas that can be exported as PNG or displayed in a live interactive window. Its rendering pipeline runs from HTML through the DOM, style and layout trees, paint commands, and a canvas; the interactive mode supports scrolling, link navigation, form filling, and browsing history. The project includes its own HTML and CSS parsers, layout engine, SVG renderer, image loader, PNG encoder, WebAssembly interpreter, networking layer, and JavaScript DOM bindings, rather than wrapping WebKit, Gecko, or Chromium.