Pythonic Regex API in TypeScript

A TypeScript library providing a Python-like re interface for regex operations, targeting evergreen browsers. The API closely mirrors Python’s re module, with seamless support for both JavaScript and Python-only regex features.

Features

• Pythonic API: re.match, re.search, re.compile, re.sub, re.split, re.findall, re.fullmatch, re.escape
• Automatic backend selection:
  • Uses Pyodide and Python’s regex package for Python-only features
  • Uses latest JS RegExp and core-js polyfill for JS-compatible patterns
• Written in modern TypeScript, targeting evergreen browsers
• Zero technical debt: Bun for scripts, Vite for build/test/bundle, ESLint + Prettier for code quality

Installation

bun install @syntropiq/pyrex

Usage

import * as re from '@syntropiq/pyrex';

const result = re.match('a(b+)', 'abbb');
if (result) {
  console.log(result.group(1)); // 'bbb'
}

Development

• Build: bun run build
• Test: bun run test
• Lint: bun run lint
• Format: bun run format

Project Structure

• src/ — TypeScript source code
• test/ — Unit tests
• PLAN.md — Architecture and implementation plan
• TODO.md — Task breakdown and progress tracking

Contributing

Contributions are welcome! Please see PLAN.md and TODO.md for project direction and open tasks.

License

MIT