var server = new ot.Server();

server.broadcast = function(delta) {
  // You're in charge of how you want to send out data
  // Websockets are probably your best bet, i like http://socketcluster.io/
}

function onReceiveDelta(version, delta) {
  var deltaToSend = server.receiveDelta(version, delta);
  server.broadcast(deltaToSend);
}

// Client joining at revision 0
var otClient = new ot.Client(0);

// Overridden method
otClient.sendDelta = function(version, delta) {
  // Send this delta to the server
  // Again, you choose how
}

// Overridden method
otClient.applyDelta = function(delta) {
  quillEditor.updateContents(delta, 'api');
}

// When the user makes a change
quillEditor.on('text-change', function(delta, oldDelta, source) {
  // Make sure the change came from a user (not the api)
  if (source === 'user') {
    otClient.applyFromClient(delta);
  }
});

function onReceiveDelta(delta) {
  // If this delta was sent by this client they need to call otClient.serverAck() instead
  // this prevents deltas that have already been applied by the user from being applied twice
  otClient.applyFromServer(delta);
}