To read TypeScript configuration files Jest requires "ts-node"

[marco-carvalho]

I have a project with a jest.config.ts, and ts-node and jest both installed. But knip shows me that ts-node is a Unused devDependencies. This is a bug or am I missing something?

https://jestjs.io/docs/configuration

To read TypeScript configuration files Jest requires ts-node. Make sure it is installed in your project.

[webpro]

If there's no reference to ts-node then Knip will report it as unused.

Knip can't assume ts-node is required, otherwise it would be incorrectly reported as an unlisted dependency in situations where it's not used.

But if there's a way to figure out this distinction, we can add a condition. For instance, "if the config file ends with .ts then ts-node is required".

[marco-carvalho]

jestjs/jest#14752 related

Edit: I think this is a Jest problem, so I'm gonna close this issue.