Scala|Published: Aug 24, 2026
Current state of Scala and WebAssembly Component Model
Recently, Wasm is used in different areas: safely running AI-generated code, server-side applications with ultra-fast cold starts, and language-independent plugin systems. What Wasm itself can do is just a pure computation. It cannot affect the outside world directly. Things like file I/O, clocks, and networking have to go through interfaces imported from the host. So unless the host explicitly gives it access, a Wasm module cannot perform external effects. This is why Wasm is often described as a sandbox.
