Wasmtime
Wasmtime is a fast, standards-compliant WebAssembly runtime from the Bytecode Alliance. While wasm-bindgen connects Rust Wasm to browsers, Wasmtime targets server-side use cases: plugin systems, sandboxed computation, edge functions, and language-agnostic module hosting. WASI (WebAssembly System Interface) gives Wasm modules controlled access to OS resources — files,
wasm-bindgen
wasm-bindgen is the bridge between Rust WebAssembly and JavaScript. It generates the glue code that lets JS call Rust functions, pass complex types across the boundary, and use JavaScript APIs from Rust. That bridge is a rich source of bugs: type mismatches, ownership errors at the boundary, and behavior
WebAssembly
WebAssembly is no longer a browser novelty. Wasm modules power plugin systems, edge compute functions, serverless runtimes, and embedded logic in languages from Rust to C++ to Go. And like any production code, Wasm modules need tests — but testing Wasm is different from testing native code. The core challenge: Wasm