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A “bare wasm” target representing a WebAssembly output that makes zero assumptions about its environment.

The wasm32-unknown-unknown target is intended to encapsulate use cases that do not rely on any imported functionality. The binaries generated are entirely self-contained by default when using the standard library. Although the standard library is available, most of it returns an error immediately (e.g. trying to create a TCP stream or something like that).

This target is more or less managed by the Rust and WebAssembly Working Group nowadays at https://github.com/rustwasm.