Rikito Taniguchi: Bringing Scala to Server Side Wasm with WASI & Component Model [Scala Days 2025]

WebAssembly (Wasm) is a binary instruction format originally designed for web browsers. In recent years, its security and speed have led to its adoption beyond the browser, such as in cloud edge computing. Scala.js 1.17.0 introduced support for compiling to Wasm with JavaScript embedding. Building on this, we are now working to extend Wasm support to non-web environments using WASI. This talk will cover how we get Scala Wasm to run outside the browser, key technologies like the Component Model - which provides a standard for interoperability between languages - and the current state of the Scala-to-Wasm compiler, highlighting its potential and limitations. by Rikito Taniguchi (VirtusLab)