Isomorphic react-router-relay 
Adds server side rendering support to react-router-relay using isomorphic-relay.
Installation
npm install -S isomorphic-relay isomorphic-relay-router
How to use
Create a Relay network layer on the server.
And if you are using Relay.DefaultNetworkLayer, specify the full url to the GraphQL endpoint:
const GRAPHQL_URL = `http://localhost:8080/graphql`;
const networkLayer = new Relay.DefaultNetworkLayer(GRAPHQL_URL);When processing a request on the server, get renderProps using match function from
react-router (see
here),
prepare the data using IsomorphicRouter.prepareData, then render React markup using
IsomorphicRouter.render (pass the props returned by IsomorphicRouter.prepareData), and send
the React output along with the data to the client:
import IsomorphicRouter from 'isomorphic-relay-router';
app.get('/*', (req, res, next) => {
match({routes, location: req.originalUrl}, (error, redirectLocation, renderProps) => {
if (error) {
next(error);
} else if (redirectLocation) {
res.redirect(302, redirectLocation.pathname + redirectLocation.search);
} else if (renderProps) {
IsomorphicRouter.prepareData(renderProps, networkLayer).then(render).catch(next);
} else {
res.status(404).send('Not Found');
}
function render({data, props}) {
const reactOutput = ReactDOMServer.renderToString(IsomorphicRouter.render(props));
res.render(path.resolve(__dirname, '..', 'views', 'index.ejs'), {
preloadedData: JSON.stringify(data),
reactOutput
});
}
});
});On page load in the browser, create an instance of Relay.Environment, inject an Relay network
layer to it. Get renderProps using match function from react-router, inject the prepared data
to the Relay store using IsomorphicRelay.injectPreparedData, then prepare initial render using
IsomorphicRelay.prepareInitialRender, and render React using Router from react-router (pass
the props returned by IsomorphicRouter.prepareInitialRender):
import IsomorphicRouter from 'isomorphic-relay-router';
const environment = new Relay.Environment();
environment.injectNetworkLayer(new Relay.DefaultNetworkLayer('/graphql'));
const data = JSON.parse(document.getElementById('preloadedData').textContent);
IsomorphicRelay.injectPreparedData(environment, data);
const rootElement = document.getElementById('root');
// use the same routes object as on the server
match({routes, history: browserHistory}, (error, redirectLocation, renderProps) => {
IsomorphicRouter.prepareInitialRender(environment, renderProps).then(props => {
ReactDOM.render(<Router {...props} />, rootElement);
});
});Example
See here.