Add in WASM

Client

request = new XMLHttpRequest();
request.open('GET', '/example-add.wasm');
request.responseType = 'arraybuffer';
request.send();

request.onload = function() {
  var bytes = request.response;

  webassemblyjs
    .instantiate(bytes)
    .then((module) => {

      var res = module.instance.exports.add(1, 1);
      document.getElementById("res").innerHTML = res;
    });

};

Result

...

Binary

The binary is available here: https://webassembly.js.org/example-add.wasm.