README
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NAME
hello - run Go in Browser using WebAssembly
DESCRIPTION
Hello demonstrates running Go code in a browser using WebAssembly (instructions).
- write a Go program to do work in a
main()function. - build it into WebAssembly (Wasm):
env GOOS=js GOARCH=wasm go build -o hello.wasm . - Create an HTML page with following header:
<html> <header> <script src="wasm_exec.js"></script> <script> const go = new Go(); WebAssembly.instantiateStreaming( fetch("hello.wasm"), go.importObject, ).then((result) => { go.run(result.instance); }); </script> </header> </html> - open the page in a browser and check the console output.
It is important to use wasm_exec.js that comes with Go installation:
% ls `go env GOROOT`/lib/wasm
go_js_wasm_exec go_wasip1_wasm_exec wasm_exec.js wasm_exec_node.js
Alternatively, use make(1):
% make -C ./x/wasm/hello
% go run ./x/serve ./x/wasm/hello
Documentation
Source Files
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