index.go

go func() {
  todo := document.Call("getElementById", "todo")
  var value = todo.Get("value").String()
  input, err := json.Marshal(Input{Todo: value})
  res, err := http.Post(domain, "application/json", bytes.NewBuffer(input))
  if err != nil {
    log.Fatal(err)
  } else {
    addTodo(document, value)
  }
  defer res.Body.Close()
}()