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kotlinlang

Hi :slightly_smiling_face:

We har KMP library targeting JS and Java. Is it possible to utilise kotlin webassembly for certain parts in the JS target? We have a quite large code base and want to test web assembly for our most complex (time consuming, etc) functions.

För instance:
JS -&gt; complexFunction calls a web assembly function
Java -&gt; complexFunction calls a "normal" java function.

If you understand how I mean :slightly_smiling_face:

Take a look at <https://kotlinlang.org/docs/multiplatform-expect-actual.html#different-approaches-for-using-expected-and-actual-declarations|Expected and actual declarations>

I don't thinnk expect/actual helps here. The goal of expect/actual is to use _different_ code on different platforms. But, from what I understand, OP is trying to use the same code.

What I would do is move all the complex code into its own module:

```main-code/ ← js, JVM
complex-core/  ← js, WASM, JVM```
The complex module would be compiled for the JVM, JS and WASM. Then, when creating a JVM app, you import the complex module as a normal dependency. However, when creating the JS website, you import the complex module's WASM output as an additional import, like you would import an NPM library.

As a bonus, you can also compile the complex code to JS as a fallback in case the user's browser doesn't support WASM

That sounds awesome :slightly_smiling_face:
Thanks