How to use vite to build a reusable package and publish it to npm?

[lchrennew]

Is your feature request related to a problem? Please describe.
When I run vite build and then I get transpiled js and css in default dist folder.
But it seems that these js files cannot be reused by import them into dependents.

Describe the solution you'd like
I can preset the package is an reusable module somewhere, and when I run vite build, I should get the ready-for-publish package in default dist folder.

Describe alternatives you've considered
I published the source code, that means only projects using vite can best reuse the published package

Additional context
I think it is important to keep vite to be simple to use in a world fullfilled with competition.

[underfin]

Vite has better support with web application, but it has some limit with library. Let us track here #330