Add Mill+Scala.js+WASM example (500USD Bounty)

[lihaoyi]

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From the maintainer Li Haoyi: I'm putting a 500USD bounty on this issue, payable by bank transfer on a merged PR implementing this.

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Scala.js now supports WebAssembly output (https://www.scala-js.org/news/2024/09/28/announcing-scalajs-1.17.0/). We should have an example doc-test in example/scalalib/web/ exercising the hello-world Scala.js webassembly dev workflow using Mill and include it in scalalib/web-examples.adoc as documentation.

[Quafadas]

To be honest, I'll likely have a look at this for my own curiosity in the coming days if no-one were to pick it up beforehand.

I think the key question, is whether the scope of the example includes a "live reload" solution?

[lihaoyi]

I think the key question, is whether the scope of the example includes a "live reload" solution?

No, I just want a hello-world setup. Nothing fancy, just showing off that we can create a WASM output file and run it through some WASM interpreter or runtime

[Quafadas]

run it through some WASM interpreter or runtime

An up to date browser should suffice?

If so, then this looks superficially rather easy. Famous last words :-). I'll try and have a first peek tomorrow.

[lihaoyi]

We don't have a browser in the example test suite, so you'll need to find some CLI wasm runtime to replace it

[Quafadas]

We don't have a browser in the example test suite, so you'll need to find some CLI wasm runtime to replace it

Hmmm, right, I hear you. The other option could be to wheel in playwright? Doesn't need an answer now. I'll explore it.

[yadavshubham01]

hey @lihaoyi look quite interesting working on it

[lihaoyi]

Go for it, bounties remain open until they are closed with a merged PR

[Quafadas]

@yadavshubham01

i guess for the avoidance of conflict - it’s all yours for a few days :-).

[yadavshubham01]

hey @lihaoyi checkout this pr #3839