Bringing Scala to Server Side Wasm with WASI and Component Model

Explore how to extend Scala's WebAssembly capabilities beyond the browser environment in this 45-minute conference talk from Scala Days 2025. Learn about the evolution of WebAssembly from its original web browser design to its current applications in cloud edge computing, driven by its security and performance advantages. Discover how Scala.js 1.17.0's Wasm compilation support with JavaScript embedding serves as the foundation for extending Wasm support to non-web environments using WASI (WebAssembly System Interface). Understand the Component Model, a crucial technology that establishes standards for cross-language interoperability in WebAssembly environments. Examine the current development state of the Scala-to-Wasm compiler, including its capabilities, potential applications, and existing limitations. Gain insights into the technical challenges and opportunities involved in bringing Scala to server-side WebAssembly environments, and understand how this advancement could impact cloud computing and edge deployment scenarios for Scala applications.