This project attempts to analyze npm package contents for issues with their TypeScript types, particularly ESM-related module resolution issues. Packages can be explored via the website or CLI. The following kinds of problems can be detected in the node10, node16, and bundler module resolution modes:

• 💀 Resolution failed
• ❌ No types
• 🎭 Masquerading as CJS
• 👺 Masquerading as ESM
• ⚠️ ESM (dynamic import only)
• 🐛 Used fallback condition
• 🤨 CJS default export
• ❗️ Incorrect default export
• ❓ Missing export =
• 🚭 Unexpected module syntax
• 🥴 Internal resolution error
• 🕵️‍♂️ Named exports

You can check packages on disk with @arethetypeswrong/cli. See its README for usage.

Contributions are welcome! Take a look at the open issues or read about how to contribute to open source.