Bug Report

🔎 Search Terms

NodeNext, esm, CJS, cli-spinners

🕗 Version & Regression Information

• This only occurs in nightly builds.
• I was unable to test this on prior versions because nodenext is only supported in the nightly versions.

⏯ Playground Link

From what I can tell you can't install npm modules in the playground, so I made a repro on StackBlitz: https://stackblitz.com/edit/node-opvt9e?file=index.ts run npm run typecheck in the console to see the issue.

💻 Code

import spinners from 'cli-spinners';

console.log(spinners);

🙁 Actual behavior

TypeScript cannot find the typings for cli-spinners which is a CJS module. It does not use a main or exports or types field in the package.json, it just includes a index.js and index.d.ts file.

index.ts:1:22 - error TS2307: Cannot find module 'cli-spinners' or its corresponding type declarations.

1 import spinners from 'cli-spinners';
                       ~~~~~~~~~~~~~~


Found 1 error in index.ts:1

🙂 Expected behavior

New NodeNext module behaviour to import CJS as it used to. E.g looking at index.d.ts if there is no main field. https://www.typescriptlang.org/docs/handbook/module-resolution.html#how-typescript-resolves-modules

👪 Related

• Missing main field sindresorhus/cli-spinners#61
• Concerns with TypeScript 4.5's Node 12+ ESM Support #46452