How to install type definitions in 8th Studio?

Sorry for the repost, accidently deleted my initial post.

Got a message from within studio stating “Cannot find name ‘described’. Do you need to install type definitions for a test runner? Try ‘npm i --save-dev @type/jest’ or ‘npm i --save-dev @type/mocha’.”

Not sure how or where to implement the recommended text to install it, was wondering if anyone could help?

You can’t install type definitions, however you can change your code from .ts to .js to avoid needing types at all.