Add option to minify `es` format in library mode

You can use a CDN like jsDelivr, which allows auto-minification by adding .min before the file extension.

That said, CDNs are an anti-pattern these days, due to HTTP cache partitioning. You end up downloading more data than if you bundled, because less byte compression can be done.

Additionally, minifying your library is hostile to NPM users, since it can make debugging more difficult, and it prohibits the use of tools like patch-package.

I think there are legitimate uses for cdn libraries, like if you want to create a package that is to be used outside of a node framework. Sure the caching might not work between websites but that’s not the main feature of a CDN based javascript library, the main feature is that it is accessible via the web.

What is the use case for library mode? Because this combined with not being able to inject css styles makes me think that there is a very specific use case in mode. If it’s specifically creating pure javascript modules for npm and usage in the node ecosystem that’s perfectly acceptable and maybe the answer is that it’s specified in the vite documentation and people who need further functionality either create something else rollup or webpack based.

Or maybe even library mode should be it’s own vite like offshoot package that supports a breadth of use cases. Tsdx exists but it hasn’t been updated in a year.