docs/bundle.js
function renderToStaticMarkup(element) {
  var renderer = new ReactDOMServerRenderer$1(element, true);
  var markup = renderer.read(Infinity);
  return markup;
}
function renderToStaticMarkup(element) {
  var renderer = new ReactDOMServerRenderer$1(element, true);
  var markup = renderer.read(Infinity);
  return markup;
}
Similar to renderToString, except this doesn't create extra DOM attributes
such as data-react-id that React uses internally.
See https://reactjs.org/docs/react-dom-server.html#rendertostaticmarkup