Does anyone have an example of using web workers with Kotlin/WASM? Not necessarily with the worker i...

# webassembly

[Fudge]

Does anyone have an example of using web workers with Kotlin/WASM? Not necessarily with the worker in Kotlin, but at least integrating the web worker with Kotlin code and the KMP gradle plugin.

[turansky]

What is your use case for web worker?

[Winson Chiu]

Maybe look at SQLDelight's WebWorkerDriver? Not sure exactly what you're looking for.

[Fudge]

@turansky Run LLM on a different thread

[Fudge]

@Winson Chiu I'll take a look, thanks

[Fudge]

Looks like they publish a raw JS library that is just a web worker and then reference it from their wasm app
https://www.npmjs.com/package/@cashapp/sqldelight-sqljs-worker

[Fudge]

internal fun jsWorker(): Worker = js("""new Worker(new URL("@cashapp/sqldelight-sqljs-worker/sqljs.worker.js", import.meta.url))""")

[Winson Chiu]

Yes, although you don't have to actually publish it publicly. You can set up the node library as a folder.

[Fudge]

@Winson Chiu Can you elaborate on how that is done?

[Winson Chiu]

I have an example of the module here: https://github.com/TheKeeperOfPie/ArtistAlleyDatabase/tree/master/modules%2Falley%2Fsqldelight-worker

And its usage here: https://github.com/TheKeeperOfPie/ArtistAlleyDatabase/blob/master/modules%2Falley%2Fbuild.gradle.kts#L90

[Fudge]

Nice, having a simpler project helps a lot
Is this a thing in web, where if you want to consume an API designed for a web worker, you need to set up the web worker yourself?

[Winson Chiu]

Not sure, I'm not that familiar with how web works. But it does seem like you can only access the APIs from inside a .js file. You can try to compile the Kotlin to JS, which is what I do for my service worker.

[Fudge]

Yeah, that makes sense. I only need a few lines of code so I can endure the JS for that 😁
Thanks a lot!

[turansky]

We support WorkerFactory in Seskar - it allows to create Worker without separate subproject creation.

[turansky]

Example

[Fudge]

@turansky it says kotlin/js, is it for wasm?

[turansky]

Not for now
But If you need own workers - you will need something similar

[turansky]

If WASM generarate single JS for subproject - you can share implementation with separate subproject for worker