How do I compile Go code to WebAssembly?

Compiling Go code to WebAssembly allows you to run Go applications in web browsers, making it a powerful tool for web development. Follow these steps to compile your Go code into WebAssembly format.

        // Install the Go compiler and setup your Go environment
        
        // Create a simple Go program (main.go)
        package main

        import (
            "syscall/js"
            "fmt"
        )

        func main() {
            ch := make(chan struct{}, 0)

            // Register a function to be called from JavaScript
            js.Global().Set("sayHello", js.FuncOf(sayHello))

            <-ch // Prevent the program from exiting
        }

        func sayHello(this js.Value, p []js.Value) interface{} {
            fmt.Println("Hello from Go WebAssembly!")
            return nil
        }

        // To compile to WebAssembly run:
        // GOOS=js GOARCH=wasm go build -o main.wasm main.go
    

After compiling your Go code into a WebAssembly file (main.wasm), you can load it in an HTML page using the following script: