Use subscriptions-transport-ws to run a GraphQL subscription from a JavaScript client.

graphql-subscriptions-client.js

// To run this code yourself:
// 1. Download and run the demo server: https://github.com/apollostack/frontpage-server
// 2. Use create-react-app to create a build system
// 3. npm install subscriptions-transport-ws
// 4. Replace all of the code in src/ with just this file

import { Client } from 'subscriptions-transport-ws';

const client = new Client('ws://localhost:8090');

client.subscribe({
  query: `
    subscription UpvotedPostSubscription {
      postUpvoted {
        title
        votes
      }
    }
  `
}, (err, res) => {
  if (err) {
    console.error(err);
    return;
  }

  console.log(`"${res.postUpvoted.title}" has ${res.postUpvoted.votes} votes now.`);
})

Well, I've got an error of:

"Schema must be an instance of GraphQLSchema. Also ensure that there are not multiple versions of GraphQL installed in your node_modules directory."

Still I don't know how to use subscriptions. :'( My issue is here: https://github.com/apollostack/GitHunt-React/issues/156