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Pierre-Henry Soria ✨
Pierre-Henry Soria ✨

Posted on • Updated on

Fix Duplicate identifier IteratorResult

Troubleshooting TypeScript: Resolving the 'Duplicate Identifier IteratorResult' Error


Summary

If you are encountering errors like the following

node_modules/@types/node/index.d.ts:166:11 - error TS2300: Duplicate identifier 'IteratorResult'.
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node_modules/@types/node/index.d.ts:166:11 - error TS2300: Duplicate identifier 'IteratorResult'

Why am I receiving it now?

This issue can arise after bumping tslint package or any related packages that, upon upgrade, might cause such conflicts.

How can I fix it?

If you encounter these errors, you are probably missing some TypeScript type definitions. Typically, you can resolve this by installing the corresponding NodeJS TypeScript types with either npm install --save-dev @types/node if you are using NPM or yarn add -D @types/node if you are using Yarn.

After installation, re-run your Node.js project, and the errors should be resolved. 🤠

Happy coding!

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