Open
Description
Clear and concise description of the problem
tsdown supports CJS as a possible output format. Given that require(esm) exist nowadays and Node 18 is EOL, ESM or at least dual export should be preferred and CJS should be discouraged.
Suggested solution
While there are many ways to nudge towards using ESM, from being radical and remove CJS support over to more gentle ways, emitting an info/warning when using CJS could be helpful and make people aware of the current situation where switching is less costly than before, ideally paired with some blog post or documentation (could be living directly in the tsdown docs).
Alternative
No response
Additional context
No response
Validations
- Follow our Code of Conduct
- Read the Contributing Guide.
- Check that there isn't already an issue that request the same feature to avoid creating a duplicate.