Waring for .js instead of .isx input

[thetarnav]

In my package I was exporting functions from the index.ts entry file. Even though I was using JSX in other files, the index.ts had no reason to have an .tsx extension.

Hence I feed that input to the solid rollup preset like so: { input: "src/index.ts" }

This causes the entry file of dist/source to be index.js, not index.jsx, which I didn't know there was anything wrong with until I used the package in solid-start, and saw this error:

Now I get what's wrong, and corrected it.

But wouldn't it be nice to display some sort of a waring that the entry file should be .tsx/.jsx to generate the source output. Because the source export makes sense only with JSX right?
Anyway, I just thought I share it – it was confusing to figure out.