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# tree-sitter-language-pack — Node.js

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Node.js NAPI bindings for tree-sitter-language-pack with on-demand parser downloads.

## Installation

```sh
npm install @kreuzberg/tree-sitter-language-pack
```

```sh
pnpm add @kreuzberg/tree-sitter-language-pack
```

```sh
yarn add @kreuzberg/tree-sitter-language-pack
```

## Quick Start

```javascript
const { init, download, availableLanguages, hasLanguage, process } = require("@kreuzberg/tree-sitter-language-pack");

// Optional: Pre-download specific languages for offline use
init(["python", "javascript", "rust"]);

console.log(availableLanguages());
console.log(hasLanguage("python")); // true

// Auto-downloads language if not cached
const result = process('function hello() {}', { language: 'javascript' });
console.log('Functions:', result.structure.length);

// Pre-download languages for offline use
download(["python", "javascript"]);

// With chunking (auto-downloads if needed)
const result2 = process(source, { language: 'javascript', chunkMaxSize: 1000 });
console.log('Chunks:', result2.chunks.length);
```

## API Reference

### Language Discovery

- `availableLanguages()` -- list all supported language names
- `hasLanguage(name)` -- check if a language is available
- `languageCount()` -- total number of supported languages

### Language Detection

- `detectLanguage(path)` -- detect language from file path
- `detectLanguageFromContent(content)` -- detect language from shebang line
- `extensionAmbiguity(ext)` -- check if an extension is ambiguous (returns assigned language + alternatives)

### Parsing

- `getParser(name)` / `parseString(source, language)` -- parse source code into a syntax tree

### Download API

- `init(languages)` -- pre-download specific languages for offline use
- `download(languages)` -- download parsers on demand

### Intelligence

- `process(source, config)` -- extract structured analysis (functions, classes, imports, comments, chunks) from source code

### Syntax Highlighting Queries

- `getHighlightsQuery(language)` -- get bundled highlights.scm query for a language
- `getInjectionsQuery(language)` -- get bundled injections.scm query
- `getLocalsQuery(language)` -- get bundled locals.scm query

For full documentation, see [kreuzberg.dev](https://docs.tree-sitter-language-pack.kreuzberg.dev).

## License

MIT -- see [LICENSE](https://github.com/kreuzberg-dev/tree-sitter-language-pack/blob/main/LICENSE) for details.

---

Part of [tree-sitter-language-pack](https://github.com/kreuzberg-dev/tree-sitter-language-pack) -- A comprehensive collection of tree-sitter language parsers with polyglot bindings.
