Has anyone managed to get Kotlin wasmjs output to ...

# webassembly

[loke]

Has anyone managed to get Kotlin wasmjs output to run in a browser webworker engine? If so, is there some documentation on how to do it?

[Michael Paus]

Could you be a little bit more specific about what you actually want to achieve?

[loke]

Right now I have a rather large piece of Kotlin code (a language interpreter) that I compile to js. The frontend then loads the interpreter into a webworker so that the code can run there without blocking the main js thread.

[loke]

This is the interpreter by the way: https://kapdemo.dhsdevelopments.com/clientweb2/

[loke]

Now, I am able to compile the interpreter to wasmjs, that part works fine. But I cannot load it into a webworker due to the way the js integration is done (it tries to eval some js code, which doesn't work in wasm)

[loke]

The issue isn't with the generated wasm, but rather with the javascript harness that is generated by the compiler. Loading the wasm without that harness fails, because a lot of required functions are missing.

[ephemient]

https://youtrack.jetbrains.com/issue/KT-68453/K-Wasm-Supported-JS-engine-not-detected-in-Web-Worker

[ephemient]

says it is fixed in Kotlin 2.0.20; are you finding that not to be the case?

[loke]

It's been a while since I tested it. It could be that it was before 2.0.20. I'll have to check the git log.

[loke]

I was asking the question, because I rolled all the code back so I'd have to start working on the wasm port again from scratch, and I don't want to do that unless I can be reasonably sure it'll work.

[loke]

Thanks for the information. I'll investigate this.