JetBrains has released Kotlin 2.4.20, the latest version of the concise multiplatform language.
The release covers updates across Kotlin/Native, Kotlin/Wasm, Kotlin/JS, Gradle, and the language compiler.
The latest version of Kotlin is included in the latest versions of IntelliJ IDEA and Android Studio.
STANDARD LIBRARY ENHANCEMENTS
The standard library adds coroutine stack trace recovery, new functions for checking equality and uniqueness of collection elements, and new overloads for kotlin.test assertion functions. TechStaged has also covered Lyria 3.5 Arrives in Google Gemini App and API, Promising Higher-Fidelity Music Creation.
- Coroutine stack trace recovery support
- New collection element equality and uniqueness helpers
- Additional overloads for kotlin.test assertions
KOTLIN/NATIVE UPDATES
Kotlin/Native introduces Swift export features, improved incremental compilation, and automatically generated Package.swift files for SwiftPM dependencies.
- Swift export features
- Improved incremental compilation
- Automatically generated Package.swift for SwiftPM
KOTLIN/WASM IMPROVEMENTS
Kotlin/Wasm includes changes to top-level require() calls in @JsFun declarations, improved companion object initialization order, and Wasmtime support in the Kotlin Gradle plugin.
- Top-level require() changes in @JsFun
- Improved companion object initialization order
- Wasmtime support in Kotlin Gradle plugin
KOTLIN/JS ENHANCEMENTS
Kotlin/JS introduces a new DSL for browser testing, support for exporting suspend lambdas as async functions, and improved exportability of data classes.
- New DSL for browser testing
- Export suspend lambdas as async functions
- Improved exportability of data classes
GRADLE AND BUILD TOOLS UPGRADES
Gradle now supports Gradle 9.7.0 and offers improved reporting in the Problems API.
The Build tools API adds support for new targets: Kotlin/JS, Kotlin/Wasm, and Kotlin metadata.
- Gradle 9.7.0 compatibility
- Problems API reporting improvements
- New Build tools targets: Kotlin/JS, Kotlin/Wasm, Kotlin metadata
COMPILER AND TOOLING
The Kotlin compiler includes the kotlinr runner command and a separate native image.
- kotlinr runner command
- Separate native image
HOW TO UPDATE
To update to Kotlin 2.4.20, ensure your IDE is updated to the latest version and set the Kotlin version to 2.4.20 in your build scripts.
- Update IDE to latest version (IntelliJ IDEA / Android Studio)
- Set Kotlin version to 2.4.20 in build scripts
RELATED COVERAGE
- Lyria 3.5 Arrives in Google Gemini App and API, Promising Higher-Fidelity Music Creation
- Android Emulator gains command-line control for adaptive app development
- Google DeepMind Accelerator APAC backs 16 green AI projects to scale environmental solutions
- OpenAI researcher emphasizes stronger safeguards and international coordination for AI alignment
- Software articles
SOURCES
- The JetBrains Blog: Kotlin 2.4.20 Released Published · Primary source
