Learn KOTLIN-JS-WASM with Real Code Examples
Updated Nov 25, 2025
Learning Path
Learn Kotlin basics
Understand Kotlin Multiplatform
Try Kotlin/JS DOM interop
Build a simple Kotlin/Wasm demo
Create a full-stack Kotlin/Compose app
Skill Improvement Plan
Week 1: Kotlin/JS basics
Week 2: Interop + DOM APIs
Week 3: Wasm target + build tools
Week 4: Compose for Web UI
Week 5: Optimize + deploy Kotlin/Wasm app
Interview Questions
How does Kotlin compile to JS and Wasm?
What is Kotlin/Wasm-GC and why is it important?
How does Kotlin/JS interop work?
Describe the Kotlin Multiplatform structure.
Explain advantages of Wasm vs JS in Kotlin projects.
Cheat Sheet
kotlin { js(IR) { browser() } }
kotlin { wasm { browser() } }
use external keyword for JS imports
./gradlew jsBrowserDevelopmentRun
./gradlew wasmBrowserDistribution
Books
Kotlin Multiplatform in Action
Web Development with Kotlin
Kotlin for JavaScript Developers
Kotlin/Wasm Essentials
Compose for Web Handbook
Tutorials
Build your first Kotlin/Wasm app
Compose for Web tutorial
Interop with JavaScript
Full-stack Kotlin Multiplatform
Kotlin/Wasm performance optimization
Official Docs
https://kotlinlang.org/docs/js-overview.html
https://kotlinlang.org/docs/wasm-overview.html
Community Links
Kotlin Slack (#javascript, #multiplatform)
Kotlin YouTube
JetBrains blogs
Reddit r/Kotlin
Kotlin/JS GitHub
Community Support
Kotlin Slack
JetBrains community
Kotlin subreddit
Kotlin/JS GitHub discussions
Kotlin Multiplatform ecosystem