Multiplatform Kotlin in 42 minutes

on YouTube ↗47m

" summary

Kotlin code implements a Mandelbrot renderer once in a common module and compiles it to a JVM backend, a JavaScript React frontend and a console app, reusing the same renderer and tests via expect/actual abstractions. Build uses Gradle and Kotlin/JS with HTML/CSS wrappers and coroutines for async server/client work. The repo is ~2k LOC, JS bundle ~4MB and the native binary ~800KB. Output images match across platforms and live-reload + shared tests prove the approach works.

AI-written summary · about

" chapters (9)

1. 0:00Introduction
2. 5:53Mixing languages problem
3. 11:51Kotlin as solution
4. 16:30Practical example
5. 21:28HTML/CSS in Kotlin
6. 27:48Fractal implementation
7. 34:08App launch
8. 39:12Code reuse
9. 42:45Q&A

" related talks

• 49mLet's Build a Cross-Platform 3D Engine with Kotlin/MultiplatformDavid Wursteisen · Conference for Kotliners 2020
• 48mEffective Multiplatform Kotlin DevelopmentMarcin Moskała · KotlinConf 2018
• 48mEffective Multiplatform Kotlin DevelopmentMarcin Moskała · GDG DevFest Poland 2018 in Wrocław
• 01h 07mDevelop Multiplatform Projects in KotlinDmitry Jemerov · Conference for Kotliners 2018
• 06m3 platforms in 5 minutes with KotlinWojtek Kaliciński · Android Dev Summit 2018
• 33mUsing Kotlin for JS Client and JVM ServerAlexander Podkhalyuzin · GDG DevFest Sofia 2019
• 38mA Kotlink between worldsBenjamin Monjoie · Devfest Lille 2018
• 41mKotlin for the JVM and beyondIbrahim Gharbi, Yassine Benabbas · Voxxed Days Bucharest 2025