npm exports warnings

[thib3113]

Reading the changelog, I just saw you are missing the main attribute on your project .

Also, I just discovered a tool : https://www.npmjs.com/package/@arethetypeswrong/cli, that will check the exports of your packages, and here are the results :

$ attw --from-npm universal-cookie

universal-cookie v7.2.2

Build tools:
- typescript@^5.6.3
- rollup@^4.24.3

❗️ The resolved types use export default where the JavaScript file appears to use module.exports =. This will cause TypeScript under the node16 module mode to think an extra .default property access is required, but that will likely fail at runtime. These types should use export = instead of export default. https://github.com/arethetypeswrong/arethetypeswrong.githubb.io/blob/main/docs/problems/FalseExportDefault.md

🐛 Import resolved to types through a conditional package.json export, but only after failing to resolve through an earlier condition. This behavior is a TypeScript bug (https://github.com/microsoft/TypeScript/issues/50762). It may misrepresent the runtime behavior of this import and should not be relied upon. https://github.com/arethetypeswrong/arethetypeswrong.github.io/blob/main/docs/problems/FallbackCondition.md

🎭 Import resolved to a CommonJS type declaration file, but an ESM JavaScript file. https://github.com/arethetypeswrong/arethetypeswrong.github.io/blob/main/docs/problems/FalseCJS.md


┌───────────────────┬──────────────────────────────┐
│                   │ "universal-cookie"           │
├───────────────────┼──────────────────────────────┤
│ node10            │ ❗️ Incorrect default export │
├───────────────────┼──────────────────────────────┤
│ node16 (from CJS) │ ❗️ Incorrect default export │
├───────────────────┼──────────────────────────────┤
│ node16 (from ESM) │ 🐛 Used fallback condition   │
│                   │ 🎭 Masquerading as CJS       │
├───────────────────┼──────────────────────────────┤
│ bundler           │ 🐛 Used fallback condition   │
└───────────────────┴──────────────────────────────┘

---

also, I doesn't have a problem now with this package ... It's just to share that you will maybe got other errors with exports

[lbg-marco-massarotto]

issue is cause by a bad export entry

"types": "./esm/index.d.mts"

it should be

"types": "./esm/index.d.ts"

instead