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Is there any plans in near future to update variou...
# webassembly
j
Is there any plans in near future to update various experimental Kotlin/Wasm and Compose for Web artefacts to work with likes of Kotlin 1.9.20.x ?
➕ 8
b
Hi! Sorry for the delay. Here are some libraries compatible with 
1.9.20*
and available at https://maven.pkg.jetbrains.space/kotlin/p/wasm/experimental
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kotlinx-coroutines	1.7.2-wasm1
compose-multiplatform	1.5.1-dev-wasm01
kotlinx-serialization	1.6.0-wasm0
kotlinx-atomicfu	0.22.0-wasm1
kotlinx-datetime	0.4.0-wasm2
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j
very cool, thanks!
I had come across and tried to use that version of compose but getting following for some reason....could be some other issue in my setup
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An exception occurred applying plugin request [id: 'org.jetbrains.compose', version: '1.5.1-dev-wasm01']
> Failed to apply plugin 'org.jetbrains.compose'.
   > Shared build service 'org.jetbrains.compose.internal.service.ConfigurationProblemReporterService' parameters have unexpected type: org.gradle.api.services.BuildServiceParameters
is 
1.4.0-dev-wasm09
the right version of compose compiler to use?
also getting
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> Could not resolve all dependencies for configuration ':compose-web:wasmJsNpmAggregated'.
   > Could not find org.jetbrains.kotlin:kotlin-stdlib:1.9.30-dev-460.
b
I just update versions there
j
I had been using that as reference all right....let me compare again
ok, working now, thanks!
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started with the most minimal kmp sample I had (https://github.com/joreilly/chip-8) ....will update other samples I have that use Wasm soon
(dependency stuff i there probably needs to be cleaned up a bit as well)
b
🎉
j
you can play space invaders (and other games) now in Wasm based Compose for Web client 😃
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performance is a bit slow but I imagine that will improve.over time
I'll update PeopleInSpace and BikeShare KMP samples next
re. performance, could be some bottlenecks as well in chip-8 emulator....I need to look more closely at that too......though speed is reasonable in for example Compose for Desktop client
also just came across following think it's Rust based 😉 https://code.benco.io/chip8/web/
@bashor do you think performance right now is somewhat expected given stage tech is at or is it worth seeing if as mentioned there are perhaps some bottlenecks in the implementation?
@bashor is 
2.3.3-wasm0
still latest version of Ktor that supports wasm (from https://maven.pkg.jetbrains.space/kotlin/p/wasm/experimental/io/ktor/ktor/)?
if I try to use that (this is a different project to above....it's BikeShare) I get
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Could not find org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.20-Beta2.
this is due I guess to
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if (requested.module.name.startsWith("kotlin-stdlib")) {
                val kotlinVersion = project.property("kotlin.version") as String
                useVersion(kotlinVersion)
            }
b
is 
2.3.3-wasm0
still latest version of Ktor that supports wasm
I think so, we don’t have new ktor yet (cc @Igor Yakovlev)
> though speed is reasonable in for example Compose for Desktop client I think it’s more likely related to timers directly or indirectly. There is restriction in the browsers, like described here https://developer.mozilla.org/en-US/docs/Web/API/setTimeout#reasons_for_delays_longer_than_specified
do you think performance right now is somewhat expected given stage tech is at
or is it worth seeing if as mentioned there are perhaps some bottlenecks in the implementation?
The performance mostly should be good — at least, comparable or better than JS. Definitely, there is room for improvement, there could be issues in specific libraries. Feel free to report perf issues as well.
j
I think I saw something about that before (timers) but then was wondering about https://code.benco.io/chip8/web/ ...they seem to perform very well....but could likely of course be using different approach
re. above on using ktor etc.....should there be a 
org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.20-Beta2
version right now?
b
I think I saw something about that before (timers) but then was wondering about https://code.benco.io/chip8/web/ ...they seem to perform very well....but could likely of course be using different approach
IDK, from first sight, I don’t feel a difference 🤷‍♂️
j
should there be a 
org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.20-Beta2
version right now
I see there's 
1.9.20-dev-6845
version of that and a 
1.9.20-Beta2
version of 
kotlin-stdilib-wasm-js
I can try and setup a 
resolutionStrategy
to handle those
b
speaking about ktor it might be tricky, due to • new toolchain needs new stdlib (runtime), • new stdlib-wasm has some ABI changes and you may get linking error for libraries compiled against old stdlib
right, there should be 
kotlin-stdilib-wasm-js
and 
kotlin-stdilib-wasm-wasi
since 1.9.20-Beta
no 
kotlin-stdilib-wasm
j
it's ktor that seems to be looking for 
kotlin-stdlib-wasm
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+--- io.ktor:ktor-client-core:2.3.3-wasm0
|    \--- io.ktor:ktor-client-core-wasm:2.3.3-wasm0
|         +--- org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.0 -> 1.9.20-Beta2 FAILED
|         +--- org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.2-wasm0 -> 1.7.2-wasm1 (*)
b
https://kotlinlang.slack.com/archives/CDFP59223/p1696348807259419?thread_ts=1696070166.178509&cid=CDFP59223 You can try to comment this part, after that you probably will need to add 
maven("<https://maven.pkg.jetbrains.space/kotlin/p/kotlin/dev>")
to repos
j
I have that repo here already
b
better to try replacing 
org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.0
with 
org.jetbrains.kotlin:kotlin-stdlib-wasm-js:1.9.20-Beta2
j
I'll try that now
ok, I think following worked (though probably cleaner way of doing it)
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resolutionStrategy {
    dependencySubstitution {
        substitute(module("org.jetbrains.kotlin:kotlin-stdlib-wasm:1.9.0"))
            .using(module("org.jetbrains.kotlin:kotlin-stdlib-wasm-js:1.9.20-Beta2"))
    }

    eachDependency {
        if (requested.module.name.startsWith("kotlin-stdlib")) {
            useVersion("1.9.20-Beta2")
        }
    }
}
got a bit further but ended up with
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e: There are still 2 unbound symbols at the end of IR linkage process:
Unbound public symbol IrSimpleFunctionPublicSymbolImpl: org.w3c.dom/WebSocket.addEventListener|-5832680268725389244[0]
Unbound public symbol IrSimpleFunctionPublicSymbolImpl: org.w3c.dom/WebSocket.removeEventListener|3589491163511314858[0]
b
@John O'Reilly thanks for trying, we’ll let you know as soon as we publish a new version of ktor
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j
Using the same versions mentioned here:
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compose = "1.5.1-dev-wasm01"
compose-compiler = "1.5.2.1-Beta"
kotlin = "1.9.20-Beta2"
ksp = "1.9.20-Beta2-1.0.13"
serialization = "1.6.0-wasm0"
When running the task compileProductionExecutableKotlinWasmJs I get the error:
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Module "org.jetbrains.compose.ui:ui" has a reference to symbol kotlin/AllowDifferentMembersInActual.<init>|<init>(){}[0]. Neither the module itself nor its dependencies contain such declaration.
Anyone has any idea whether I am doing something wrong 😐?
b
@Justin Salér the error sounds like there are incompatible versions of compose and stdlib
j
Thank you! @bashor. Seems like the issue was fixed by adding this code
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configurations.all {
    resolutionStrategy.eachDependency {
        if (requested.module.name.startsWith("kotlin-stdlib")) {
            useVersion(libs.versions.kotlin.get())
        }
    }
}
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j
@bashor just in case there were updated version of Ktor libraries (I'm looking at https://maven.pkg.jetbrains.space/kotlin/p/wasm/experimental/io/ktor/ktor/ ....is that correct place to look?)
b
@John O'Reilly yeah, it’s right place and you 
3.0.0-wasm0
I just waited updates for compose before sharing it. But, actually, this version of ktor should work with well with library versions mentioned above.
j
ah, sorry, I somehow missed that there was 
3.0.0-wasm0
version now.....will try that
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Looking good so far
b
👍 thanks for trying
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