One of the main concern for me about this is that this only works in node as the API isn't implemented in Bun or Deno iirc, and it's still experimental. In the past, I also thought about using tsx's tsImport within Vite, but the limitation held me back.

But maybe it's still worth including this for now though as the config loading feature is also experimental.

@bluwy
Yeah, it doesn't work with Bun / Deno. It's still experimental but it's also in a release candidate phase, the last phase before it is stablized. Given that it's a QOL improvement feature, I think the lack of support (for now) is fine (if we swap it in a major).

Writing a test for this is difficult. If I write a test in Vitest, the SSR transform replaces the dynamic import with the Vite's internal dynamic import function and the loader won't be called. To write a unit test that runs node command, I need to export the function but I don't want to export the function...

I'm personally fine without a test for now if it's difficult. I wonder if it's also good to extract this code as its own package too. I imagine other packages in the ecosystem may also find this useful, and it'll indirectly simplify testing. But that's just my thought 😅