WebAssembly.Module()

new WebAssembly.Module(bufferSource);

var importObject = {
  imports: {
    imported_func: function (arg) {
      console.log(arg);
    },
  },
};

function createWasmModule(bytes) {
  return new WebAssembly.Module(bytes);
}

fetch("simple.wasm")
  .then((response) => response.arrayBuffer())
  .then((bytes) => {
    let mod = createWasmModule(bytes);
    WebAssembly.instantiate(mod, importObject).then((result) =>
      result.exports.exported_func(),
    );
  });