iris/_examples/webassembly/client/main.js

import './go-wasm-runtime.js';

if (!WebAssembly.instantiateStreaming) { // polyfill
  WebAssembly.instantiateStreaming = async (resp, importObject) => {
    const source = await (await resp).arrayBuffer();
    return await WebAssembly.instantiate(source, importObject);
  };
}

const go = new Go();
WebAssembly.instantiateStreaming(fetch("hello.wasm"), go.importObject).then((result) => {
    return WebAssembly.instantiate(result.module, go.importObject);
}).then(instance => go.run(instance));