Scala.js to Wasm—Exploring the Wasm backend for Scala.js with Sébastien Doeraene copertina

Scala.js to Wasm—Exploring the Wasm backend for Scala.js with Sébastien Doeraene

Scala.js to Wasm—Exploring the Wasm backend for Scala.js with Sébastien Doeraene

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The JVM-to-Web journey continues! In this episode, Thomas Steiner welcomes the original author of Scala.js, Sébastien Doeraene, to discuss the major, experimental leap to WebAssembly. You'll learn why the team decided to target Wasm now and how it complements the existing JavaScript emission. This episode offers a technical deep-dive into how Scala's powerful, nominal type system maps its objects and classes onto Wasm GC, and examines the critical details of interoperability, including what happens when a Scala object crosses the boundary to a JavaScript function. Finally, Sébastien covers the current status of the Wasm ecosystem for Scala.js, and the key limitations you need to know before you flip the `withExperimentalUseWebAssembly(true)` switch. Tune in to discover how a mature typed language is laying a fast, new foundation on the web! Chapters: 0:00 - Commonalities between composing music and composing compilers 1:38 - Scala, Scala.js, Scala Native, and the Scala Center 11:01 - The "elevator pitch" for Scala.js 14:59 - Is Scala.js competing with TypeScript? 20:31 - What motivated the decision to target Wasm? 26:40 - ] How Scala.js utilizes Wasm GC 31:24 - What's actually crossing the boundary between JS and Scala.js? 37:37 - BigInt support in Scala.js 38:38 - The status of the library ecosystem for the Wasm target 41:40 - Sébastien's hobby project ported to Scala.js 44:02 - Is the Wasm backend purely a Scala.js thing for browsers? 52:38 - What developers should be aware of before flipping that `withExperimentalUseWebAssembly(true)` switch 58:28 - What Wasm proposals are you waiting for to unlock new features in Scala.js? 59:57 - Wasm, but not Resources: Sébastien Doeraene on GitHub → https://goo.gle/4pMPufo Sébastien Doeraene at EPFL → https://goo.gle/3KTZZhu Ensemble vocal Évohé → https://goo.gle/4pApQu5 Scala → https://goo.gle/4iYZwY1 Scala.js → https://goo.gle/4oYze9E Scala Native → https://goo.gle/4rX4hp0 Scala Center → https://goo.gle/44uffZ8 Scala to TypeScript → https://goo.gle/4j37ZcM Tyrian → https://goo.gle/4iZCOik Laminar: https://laminar.dev/ Scala.js WebAssembly backend → https://goo.gle/4oT4bvV Announcing Scala.js 1.19.0 → https://goo.gle/4aSYM4F Wasm GC proposal: https://github.com/WebAssembly/gc JSPI proposal → https://goo.gle/4s5cIik Scala.js Interoperability → https://goo.gle/4afJdE1 Scaladex homepage with stats → https://goo.gle/4ja7jCr FunLabryrinhte (Scala) → https://goo.gle/4oTghoL FunLabryrinhte (original) → https://goo.gle/3KA8EWx Bringing Scala to Server-Side Wasm → https://goo.gle/4pgwC7v Scala.js Wasm Limitations → https://goo.gle/4s1jOnN Custom descriptors proposal → https://goo.gle/4p8I7Og Stack Switching Proposal → https://goo.gle/4pJG8B1 JS Primitives Builtins proposal → https://goo.gle/4akAnor Shared-Everything Threads proposal → https://goo.gle/3MCCxGd Watch more WasmAssembly → https://goo.gle/WasmAssembly Subscribe to Chrome for Developers → https://goo.gle/ChromeDevs #WebAssembly #Wasm #ChromeForDevelopers #Chrome Speaker: Thomas Steiner Products Mentioned: Web Assembly (Wasm),
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