Go 1.24 Boosts Wasm Capabilities: WASI Reactors and Exported Functions

2025-02-14

Go 1.24 significantly enhances WebAssembly (Wasm) support with the introduction of the `go:wasmexport` directive and the ability to build WASI reactors. This allows Go developers to export functions to Wasm, enabling seamless integration with host applications. The new WASI reactor mode facilitates continuously running Wasm modules that can react to multiple events or requests without re-initialization. While limitations exist, such as Wasm's single-threaded nature and type restrictions, Go 1.24's improvements pave the way for more powerful and versatile Go-based Wasm applications.

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