WebAssembly module
A WebAssembly module is a compiled, self-contained unit of WebAssembly code and associated definitions that a compatible host can instantiate and execute.
Refactoring to Rust
A WebAssembly module is a compiled WebAssembly program containing code and associated definitions that can be instantiated by a host.
- How it is used
- Packages application logic as a shippable binary that a runtime executes or a Rust host calls through an interface.
- How deep it goes
- Works through building, running, and hosting a module, while describing its sandbox and input boundary rather than detailing the Wasm binary format.
- Examples
- Uses an API-search library, a wasm32-wasi executable run with WasmEdge, and a Rust host that registers and calls a module.
- What you can do after
- Build it from scratch as a Rust Wasm binary, run it with WasmEdge, and call its functions from a Rust host.
Server-Side WebAssembly
A Wasm module is a compiled WebAssembly unit containing code and associated definitions that a runtime can instantiate and execute.
- How it is used
- Builds deployable server-side application units that Wasm runtimes execute directly or through container tooling.
- How deep it goes
- Explains compilation, linear-memory data exchange, component wrapping, and container deployment, while deferring richer module data management to components.
- Examples
- Uses a Rust Hello, World guest, a scratch-based Wasm container, and a converted Flask container binary.
- What you can do after
- Builds from scratch Rust Wasm modules, inspects or wraps them with wasm-tools, and packages them as container entrypoints.
Read how Server-Side WebAssembly explains WebAssembly module →
Related concepts
- Rustproduced by · Rust is a statically typed systems programming language designed for performance, concurrency, and memory safety without requiring garbage collection.
- Wasm componentproduces · A Wasm component is a composable WebAssembly artifact that packages interfaces and implementations so code from different languages can be linked together.
- container2wasmproduced by · container2wasm is a tool that converts Linux container workloads into WebAssembly binaries by compiling CPU emulators into WebAssembly.
- user-defined functionused by · A user-defined function is a programmer-authored function that performs custom computation when invoked by an application, query, or data-processing system.
- SpinKubeused by · SpinKube is an integration that runs and orchestrates Spin applications on Kubernetes.
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