compiler-core esm build depends on non-esm depenency

[lmiller1990]

Version

3.0.0

Reproduction link

https://github.com/lmiller1990/vite-repro

Steps to reproduce

yarn install
yarn vite
go to localhost:3000
look in the console

Uncaught SyntaxError: import not found: parse compiler-core.esm-bundler.js:3:9

What is expected?

No error

What is actually happening?

Fails due to esm build depending on @babel/parser which does not ship an esm build

---

Not sure how common this use case is, we use this in VTU to compile slots passed in the mounting options as template strings, which is why I noticed it.

https://github.com/vuejs/vue-test-utils-next/blob/master/src/utils/compileSlots.ts

Not a common use case. Also not sure if this is something we can fix here; we need babel parser to have an esm build, or we compile the cjs build into esm and inline it to the compiler-core esm build? Happy to fix this, not sure what the best way to do this would be.

[watonyweng]

I executed yarn dev and got information in the console Uncaught SyntaxError: The requested module '/@modules/@babel/parser/lib/index.js' does not provide an export named 'parse'

[lmiller1990]

Yes, that's the one. No esm build for babel/parser.