This repository is a Rust library (and optional CLI tool) that generates documentation for JavaScript and TypeScript modules. It parses source code using `deno_graph` and `deno_ast`, extracts documentation nodes (functions, classes, interfaces, enums, variables, type aliases, namespaces) along with JSDoc comments, and produces output in multiple formats: JSON for programmatic consumption, plain text for CLI display, static HTML pages with search, dark mode, and breadcrumbs, and structured diffs between two versions of an API. The HTML generation uses Handlebars templates and Tailwind CSS, and includes a client-side search index built with Fuse.js. The crate is used by the `deno doc` command and is published as `@deno/doc` for the JavaScript ecosystem via WASM. Its architecture is modular: a parsing layer resolves source files into a documentation graph, and separate output modules handle text, JSON, HTML, and diff rendering. The diff engine includes rename detection and change heuristics. The project is well-tested with a large suite of snapshot and specification tests covering a wide range of TypeScript features.