Node22 under ESM, tsx running error? SyntaxError: The requested module '../a.js' does not provide an export named 'TestService'?

[zurmokeeper]

Acknowledgements

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Minimal reproduction URL

https://github.com/zurmokeeper/20250228-tsx-node22-bug

Problem & expected behavior (under 200 words)

Node v22.12.0 Executing npm run test in the root directory, reports an error.

SyntaxError: The requested module '../a.js' does not provide an export named 'TestService'

Not so under node 20.18.1, tsx version v4.19.3.

[mtmacdonald]

In a project with .js files that import ESM functions from .ts files (an old codebase) I'm also hitting SyntaxError: The requested module ... does not provide an export named ... errors.

My codebase doesn't use "type": "module" in package.json yet. I am able to build and run the entrypoint with esbuild directly. I can also confirm the above error only happens in Node 22 or Node 23. But for Node 20, tsx handles this fine:

Following.