Reading WASM Memory

<!doctype html>
  <title>WASM Test</title>
  <script>
    function fetchAndInstantiateWasm (url, imports) {
      return fetch(url)
      .then(res => {
        if (res.ok)
          return res.arrayBuffer();
        throw new Error(`Unable to fetch Web Assembly file ${url}.`);
      })
      .then(bytes => WebAssembly.compile(bytes))
      .then(module => WebAssembly.instantiate(module, imports || {}))
      .then(instance => instance.exports);
    }

    fetchAndInstantiateWasm('https://cdn.rawgit.com/guybedford/wasm-intro/38d79724/4-reading-wasm-memory/program.wasm')
    .then(m => {
      const memory = m.memory;
      const strBuf = new Uint8Array(memory.buffer, m.getStrOffset(), 11);
      const str = new TextDecoder().decode(strBuf);
      console.log(str);
    });
  </script>

char str[] = "Hello World";

char* getStrOffset () {
  return &str[0];
}