Generate modern JS outputs that can be consumed by other JS toolchains (Blazor->JS)

[javiercn]

• Users should be able to rely on standard JS idioms (import statements) to consume Blazor JS assets.
• Our build system should be able to produce an output layout that can easily be consumed by JS tools.
  • For example, adding a package.json to the project and calling an npm script after Blazor's build/publish steps.
  • This might simply mean we offer the option to link Blazor outputs into the dist/(Debug|Release) folders.

Items

• Generate ES module bundles that can be consumed via import statements.
  • Our modules should not pollute the global state (by default).
• Blazor web will have a base layer and separate chunks for enhanced nav, server interactivity, and wasm interactivity. Other Blazor flavors will be a single bundle.
• Update the wasm loading strategy to rely on standard JS idioms that toolchains can understand with enough flexibility to adapt to different bundlers.
  • Standard import. E.g. import { Blazor } from 'blazor'
  • Import as URL. E.g. import system from './_framework/system.wasm?url' (then we do fetch(system.url) or similar to load the asset).
  • Fetch (we don't include an import, and inside the loader we use fetch directly to load the asset).

[javiercn]

Part of #52819

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[rodolfograve]

Hello. Can you clarify if this item is now expected to be shipped with .NET 10? Having Blazor JS assets available as standard modules will enable several use cases.