index.js

 1import React from "react";
 2import ReactDOM from "react-dom";
 3import { BrowserRouter } from "react-router-dom";
 4import ApolloClient from "apollo-boost";
 5import { ApolloProvider } from "react-apollo";
 6
 7import App from "./App";
 8
 9const client = new ApolloClient({
10  uri: "/graphql",
11  connectToDevTools: true
12});
13
14ReactDOM.render(
15  <ApolloProvider client={client}>
16    <BrowserRouter>
17      <React.Fragment>
18        <App />
19      </React.Fragment>
20    </BrowserRouter>
21  </ApolloProvider>,
22  document.getElementById("root")
23);