Kotlin goes WebAssembly!

Visit kotl.in/wasm to get started yourself!
Kotlin 1.8.20 introduces the newest multiplatform compilation target for Kotlin - WebAssembly! This opens up new possibilities for Kotlin developers, ranging from writing web apps, to blazing fast server-side development with Node.js and standalone WebAssembly runtimes, and even bringing your Compose Multiplatform apps to the browser! Together with Sebastian Aigner ( / sebi_io , explore the examples, get an overview of WebAssembly as a technology, and learn the current state and future plans of Kotlin for WebAssembly. While it’s still early for Kotlin/Wasm, it’s the perfect time to take a look, do some experiments and build some toy projects. This video features a number of examples from the ecosystem.
We can’t wait to see what you’ll build with this first version of Kotlin/Wasm!
Want to learn more? Here’s the links mentioned in the video:
Samples showcased in this video: github.com/Kotlin/kotlin-wasm...
Docker & Wasm (Beta): docs.docker.com/desktop/wasm/
“The Huge Potential of Kotlin/Wasm” by Sébastien Deleuze: seb.deleuze.fr/the-huge-poten...
Compose Multiplatform: jb.gg/compose
WebAssembly: A new development paradigm for the web: • WebAssembly: A new dev...
Introducing Kotlin/Wasm by Zalim Bashorov & Sébastien Deleuze: • Introducing Kotlin/Was...
Scale to Zero with Spring + GraalVM or WebAssembly by Sébastien Deleuze: • Scale to Zero with Spr...
KotlinConf Keynote: blog.jetbrains.com/kotlin/202...
0:00 Introduction
0:40 WebAssembly as a technology
3:07 Hands on with Kotlin/Wasm
12:34 Wasm beyond the browser
14:03 Compose Multiplatform on Wasm
16:06 What’s next for Kotlin for Wasm

[@thanosfisherman]

Blazingly fast!

[@JimPekarek]

Really excited for this! Thanks to the Kotlin team!

[@madner201]

Multiplatform looks awesome!

[@CommanderSteps]

Thank you for this great overview! 🙂

[@pablovaldes6022]

Eagerly awaiting

[@PssGameplayER]

Great stuff.. 🎉

[@jesprotech]

I think this video is a good pointer to be aware that Kotlin now supports WASM and great that it opens these possibilities. I was expecting a bit more in-depth explanation of the where, when, and how's of this though.

[@guncolony]

Cool tech

[@_Superpants]

I already tried wasm with compose. But the experimental status is clearly noticable when using ktor, serialization and coroutines. A few of the compose apis are also not working. But its gonna be great when things get stable :)

[@NoPainInLife]

Yeah can not use Ktor here!! It is actually quite anoying for me to see this

[@ThomasKeller1]

I can understand the Kotlin/Wasm use case for the browser, but somehow I fail to see the use case for NodeJS. Wouldn't it be better, also from an ecosystem perspective, to just run Kotlin/JVM on a, well, JVM container? Is this all about hot reload / deployment? I'd be interested in the performance differences between the two.

[@IanMonroe]

I think in 2023 you'd want to use JVM, but this is a JVM competitor long-term. But now, especially using Kotlin it currently doesn't make much sense, Kotlin Multiplatform's ecosystem doesn't hold a candle to JVM's.

[@whoknows3679]

I think the good part is the ability to deploy to nodejs/deno isolates on the many providers which allows to have serverless services with low (50-80ms) startup time
Now we can write them on many languages and deploy to same infra

[@alskaa1]

I really want compose have hot reload before the next move :)

[@mahmoudalkateb2008]

that would be so cool 😁

[@nem1st]

I thought that compose already has it...

[@alskaa1]

@@nem1st this is not hot reload. Just preview.

[@mahmoudalkateb2008]

🎉 Kotlin ❤

[@henrys6099]

which http client is supported in wasm ?

[@sreeenivas00706]

you showed how to invoke Kotlin from JS, but what about the other way? I'd ideally like to not use JS and use a more structure appraoch like kotlin, can I embed Kotlin into my HTML?

[@bhaskarnishad4018]

❤

[@freshtechtips]

Does compose web use this technology to work?

[@rocketraman]

Compose-web: yes. Compose-html (what used to be called compose-web): no.

[@bashorov]

If you have any questions about Kotlin/Wasm or Wasm GC, don't hesitate to ask below.

[@______yawn6419]

whats the difference between this and the kobweb framework?

[@leonardoplaza7677]

It was a great example, but I was expecting a real example of using wasm with a React project.

[@Fletcher91]

This will be great to use in combination with wasm containers!
Goodbye graalvm.

[@NoPainInLife]

I am getting mad becas there is no Ktor support

[@henson2k]

I thought WASM is Watcom Assembler

[@anthonymadhvani5593]

I get runtime errors even when running the basic example. Should we not be using the main branch?

[@bode-fun]

Idk about that web thing. Why ship skia if you habe the dom. Just render to the dom. I think you did that before with compose for web

[@kyay10]

Because you can't consistently render things with the dom. The Dom is designed to change based on browser settings, OS settings, etc. Shipping skia ensures a consistent experience across platforms

[@dominikotocan1348]

​@@kyay10 but browser settings exist for a reason. If someone sets their font size to something large, they probably have eyesight issues and can't read small fonts. Consistent experience does not mean better experience

[@kyay10]

@@dominikotocan1348 you can still support those settings. The point is to have pixel-perfect consistent rendering without having differing bugs between websites.

[@arjix8738]

16:20 dedciated => dedicated

[@TimSchraepen]

I cannot be the only one triggered by that white paint splash on the red cabinet behind seb.

[@jesprotech]

You are not the only one who saw that white paint splash. It was actually the first thing I noticed in this video. :)

[@gi1dor]

It a reflection of the ceiling light

[@TimSchraepen]

@@gi1dor or of the light box to get better lighting. That makes sense. 😅

[@PedroAdelino]

More shit!😂