Overview

When GOOS=js and GOARCH=wasm, Go's compiler targets WebAssembly Binary format (%.wasm).

Wazero's "github.com/AR1011/wazero/experimental/gojs" package allows you to run a %.wasm file compiled by Go. This is similar to what is implemented in wasm_exec.js. See https://wazero.io/languages/go/ for more.

Example

wazero includes an example that implements the cat utility.

Experimental

Go defines js "EXPERIMENTAL... exempt from the Go compatibility promise." Accordingly, wazero cannot guarantee this will work from release to release, or that usage will be relatively free of bugs. Moreover, GOOS=wasip1 will be shipped in Go 1.21. wazero will remove this package after Go 1.22 is released.

Due to these concerns and the relatively high implementation overhead, most will choose TinyGo instead of gojs.