One person loads a Reveal.js presentation, creates a unique stream ID and shares a link with the other participants. The participants load the presentation using the unique ID and are automatically subscribed to "navigation" events from the presenter — next slide, prev slide, next fragment, etc.

Not too long ago I gave a presentation on working with distributed teams. Ironically, some members of the audience were joining remotely and for various boring reasons we couldn't share the slides over a video conferencing link. I shared a link to the hosted slides so they could follow along, but keeping everyone on the same page was an annoying distraction.

And so reveal-sync was born. "But surely," you say, "this must be a solved problem! Why re-invent the wheel?!"

Well, sometimes you just need your own wheel.

reveal-sync is

• Designed to work with Reveal.js presentations
• Very easy to use
• Available as a free service using sync.downlink.nz
• Open source (GPLv3)

reveal-sync does require that the presentation be hosted in a place that all participants have access to, e.g. GitHub.io.

Take a look at the ansible playbook in the repository. If you're using Nginx, Varnish or similar, remember that you need to support websockets and HTTP 1.1.

In your presentation, specify your reveal-sync server's URI as follows:

  <script src="lib/js/head.min.js"></script>
  <script src="js/reveal.js"></script>
  <script src="http://downlink.nz/js/socket.io.js"></script>
+ <script>
+   var reveal_sync_uri = 'http://example.com/';
+ </script>
  <script src="http://downlink.nz/js/reveal-sync.js"></script>

Copyright (C) 2015 Jacques Labuschagne

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.