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import { renderToStringWithData } from "react-apollo"

const client = new ApolloClient(...);

renderToStringWithData(App).then((content) => {
  const initialState = client.extract();
  const html = <Html content={content} state={initialState} />;

  res.status(200);
  res.send(`<!doctype html>\n${ReactDOM.renderToStaticMarkup(html)}`);
  res.end();
});