What Is WebAssembly and How Does Go Support It

WebAssembly (Wasm) is a binary instruction format for a stack-based virtual machine that allows Go programs to run in browsers and other environments; Go supports it by compiling to Wasm using the GOOS=wasm and GOARCH=wasm environment variables. To compile a Go program for WebAssembly, set the target environment and run the build command:

GOOS=wasm GOARCH=wasm go build -o main.wasm main.go

You can export Go functions to be called from JavaScript using the //go:wasmexport directive and import JavaScript functions using //go:wasmimport.

WebAssembly is a way to run code written in languages like Go directly inside a web browser at near-native speed. Instead of just running on a server, your Go code becomes a small file that the browser can execute efficiently. Think of it like translating your Go program into a universal language that any modern browser understands.