Add ability to generate lean versions of chunks for SSR

[the-illarionov]

Clear and concise description of the problem

In VitePress, each chunk has it's lean version without any static VNodes. It would be great, if we could have out-of-the-box in Vite too. And also get rid of all TextNodes and all stuff, that already comes in SSR html, leaving only interactive blocks.

Suggested solution

It would be great if we could type:
vite build --lean

And it would result in:

- dist/
  - index.html
  - assets/
    - MyModule.hash.js
    - MyModule.hash.lean.js

Alternative

No response

Additional context

No response

Validations

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• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[meteorlxy]

A standalone vite plugin is possible, but it will still require adapting your client code to work with the lean build, just like how VitePress does. BTW, I think MPA is more suitable for lean build than SPA, and that's why VitePress dropped vue-router, and tried to support MPA mode.

Anyway, it's currently a vue-only feature, and I think it should not be included in the vite core.

[the-illarionov]

@meteorlxy yeah, i've made another feature request #8314 which will make it super easy for client code. And it should not be a MPA, it's more "SSG-SPA", like Evan called it. It's when on your initial visit you get generated html and then continue spa-routing.
Actually, i've made it work right now without any plugins, but it required to make some dirty hacks with nginx routing (i pasted solution in that issue).

[sapphi-red]

I don't think we could abstract this feature among users and also this could be achieved by a plugin.