imported module evaluated as non-strict if importing module is not explicitly a module

[mhofman]

Acknowledgements

• I read the documentation and searched existing issues to avoid duplicates
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Minimal reproduction URL

https://stackblitz.com/edit/node-3q8xbs?file=index.ts

Problem & expected behavior (under 200 words)

An es modules imported by a tsx transformed file will be evaluated in sloppy/strict mode depending on the module type of the importing file, which should have no effect. A file parsed and evaluated as esm should always be strict.

When running tsx index.ts, we get isStrict: false which is incorrect. tsx index.mts or node index.mjs both output isStrict: true as expected.

For some reason a dynamic import does not exhibit the same problem.

Bugs are expected to be fixed by those affected by it

• I'm interested in working on this issue

Compensating engineering work will speed up resolution and support the project

• I'm willing to offer $10 for financial support

[mhofman]

Possibly related to #442