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# tree-sitter-language-pack — WebAssembly

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WebAssembly bindings for tree-sitter-language-pack. Includes a curated subset of 30 languages optimized for browser and edge runtimes. For all 248 languages, use native bindings (Python, Node.js, etc.).

## Installation

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

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

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

## Quick Start

```javascript
import init, { availableLanguages, hasLanguage, init as initLanguages, download } from "@kreuzberg/tree-sitter-language-pack-wasm";

await init();

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

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

import { process } from '@kreuzberg/tree-sitter-language-pack-wasm';
// Auto-downloads language if not cached in IndexedDB
const result = process(source, { language: 'javascript' });
console.log('Structure:', result.structure);

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

## API Reference

### Language Discovery

- `available_languages()` -- list all supported language names
- `has_language(name)` -- check if a language is available
- `language_count()` -- total number of supported languages

### Language Detection

- `detect_language(path)` -- detect language from file path
- `detect_language_from_extension(ext)` -- detect language from a bare file extension
- `detect_language_from_path(path)` -- detect language from a file path
- `detect_language_from_content(content)` -- detect language from shebang line
- `extension_ambiguity(ext)` -- check if an extension is ambiguous (returns assigned language + alternatives)

### Parsing

- `get_parser(name)` / `parse_string(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

- `get_highlights_query(language)` -- get bundled highlights.scm query for a language
- `get_injections_query(language)` -- get bundled injections.scm query
- `get_locals_query(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.
