#Scala.js 1.19.0 is released! It contains significant performance improvements for the WebAssembly backend (it is now often faster than JS), native support for JS async/await, and a way to leverage Wasm's JavaScript Promise Integration (JSPI). Read more at www.scala-js.org/news/2025/04...
#Scala.js 1.21.0 is out! This release introduces several changes with compatibility concerns. We encourage you to pay particular attention to the release notes. www.scala-js.org/news/2026/04...
#Scala.js 1.20.1 is released! It features a number of performance improvements, both for the JavaScript and WebAssembly backends. www.scala-js.org/news/2025/09...
RFC: We intend to deprecate support for ECMAScript 5.1 in the next version of #Scala.js. If you are still relying on it, please weigh in on the PR and tell us why. The default has been ECMAScript 2015 since Scala.js v1.0.0. github.com/scala-js/sca...
#Scala.js 1.20.2 is released! It features more performance improvements and some bugfixes. www.scala-js.org/news/2026/01...
#Scala.js 1.18.2 is released! It contains one more backward compatibility fix, improves compatibility with Scala 2.13.16, and improves the generated code for js.Dynamic.literal() with Scala 2.13.x. www.scala-js.org/news/2025/01...
#Scala.js 1.22.0 is out! This release adds support for sbt 2.x, and officializes the support for WebAssembly as stable. It also comes with performance improvements and bug fixes. www.scala-js.org/news/2026/06...
🚀 Introducing Scala Highlights – a new quarterly newsletter!
Read it now 👉 scala-lang.org/highlights/2...
Time to meet again 🥰
🙌 Scala Days 2025
🗓️ 19-21 August 2025
📍Lausanne, Switzerland
🌐 Business-driven
♥️ Community-infused
🦸 Family-friendly
Looking forward to welcoming you in August!
scala-lang.org/blog/2025/02...
The first edition recaps 2024’s biggest advancements:
✅ Named tuples in Scala 3
✅ Experimental WebAssembly backend in Scala.js
✅ Scala CLI as the new default runner for Scala
✅ Scala 3 build definitions in sbt 2.x (beta)
✅ Better Scala 3 support in IntelliJ Scala Plugin
… and much more!
Harness the Scala and JavaScript ecosystems to develop robust apps for browsers, serverless, and Node.js.
That support is the biggest source of alternative code paths and polyfills in our codebase.
The polyfills and other alternative implementations we need to support ES 5.1 include:
Math.fround to su...
github.com
Harness the Scala and JavaScript ecosystems to develop robust apps for browsers, serverless, and Node.js.
