Scala.js
@scala_js
The Scala to JavaScript compiler (official account)
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#Scala.js 1.20.1 is released! It features a number of performance improvements, both for the JavaScript and WebAssembly backends. scala-js.org/news/2025/09/0…
#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 scala-js.org/news/2025/04/2…
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/2025/02/1…
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/scala…
#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. scala-js.org/news/2025/01/2…
We are pleased to announce the release of #Scala.js 1.18.1 (instead of the expected 1.18.0). This is mostly a bugfix release. It also contains internal improvements that will support future enhancements. scala-js.org/news/2025/01/0…
#Scala.js 1.17.0 is here, and it ships with experimental WebAssembly support! Try and give the new Wasm backend for a spin and give us feedback. scala-js.org/news/2024/09/2…
#Scala.js 1.16.0 is here! It contains several improvements to the generated code size, particularly when emitting ES modules. It also consumes a bit less memory. scala-js.org/news/2024/03/1…
⚠️ WARRNING ⚠️ Martin Odersky's Twitter account got hijacked, handle changed but kept his photo. Please do not engage with the account or its tweets, a bunch of bot replies will get triggered. We are working with Martin to get it back and will confirm once it's done.
#Scala.js 1.15.0 is out! This release mainly brings a change in how the Scala 2 standard library is versioned in anticipation of SIP 51. It also reduces memory usage of the linker, although further progress on that is coming. scala-js.org/news/2023/12/2…
#Scala.js 1.14.0 is released! It features more linker performance improvements, as well as other small enhancements. scala-js.org/news/2023/09/2…
#Scala.js 1.13.2 is released. The highlight is that it is published via sbt 1.9.x which dual-publishes in a compliant format for Maven. It should be easier to use from corporate networks with strong Maven checks. It also contains bug fixes. scala-js.org/news/2023/06/2…
📯 Scala 3.3.0 is out! ✨The first release in the 3.3 Long Term Support series brings unused symbols warnings, improvements to the braceless syntax, boundary/break abstraction, and much more. Read the full announcement: scala-lang.org/blog/2023/05/3…
New blog post: Discover new tools and tutorials for faster Scala.js development with front-end tooling 🚀 scala-lang.org/blog/2023/04/1…
#Scala.js 1.13.1 is out! This release contains bug fixes and optimizations. In particular, we significantly optimized the linker (fastLinkJS), which should now be measurably faster in incremental runs (second run and following in one build tool session). scala-js.org/news/2023/04/1…
10 years ago, on February 5th 2013, I made the first commit to Scala.js. A 10-year anniversary is the perfect opportunity to look back at what made it possible. No surprise: it's some core tech decisions, sure, but mostly the people. Thank you everyone!
🎺 Blog post alert 🎺 10 years ago, we started Scala.js, the dialect of Scala that compiles to JavaScript. Today, it has become everyday reality. 🎂 As we celebrate its anniversary, come read and look back with us at what made it possible. scala-lang.org/blog-detail/20…
🎺 Blog post alert 🎺 10 years ago, we started Scala.js, the dialect of Scala that compiles to JavaScript. Today, it has become everyday reality. 🎂 As we celebrate its anniversary, come read and look back with us at what made it possible. scala-lang.org/blog-detail/20…
We are considering dropping support for Scala 2.11 in Scala.js core. Please upvote/downvote the GitHub issue and comment if you have any (remaining) 2.11 use case. github.com/scala-js/scala…
github.com
RFC Drop Scala 2.11 · Issue #4759 · scala-js/scala-js
We are considering dropping support for Scala 2.11 (prompted by #4758). Please upvote / downvote and comment for any (remaining) 2.11 use cases.
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