// https://medium.com/@everdimension/how-to-handle-forms-with-just-react-ac066c48bd4f

handleSubmit(event) {
  const form = event.target;
  const data = {}
  for (let element of form.elements) {
    if (element.tagName === 'BUTTON') { continue; }
    data[element.name] = element.value;
  }
}