Reveal.js is a popular and useful library to make web presentations. Here are some addons I use for my presentations. I will keep updating this repo everytime I think or need anything new that can be reusable for my future presentations.
This repository is to match with https://github.com/guillaumebarranco/revealjs_ws_server
Websocket when slide changed => Allow use to move slides from his smartphone and change it in live on screen (exemple)
Websocket on lightbox open/close
npm install revealjs_ws_server
There is how to implement it in your Reveal.js presentation. Just add these script tags in your html.
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.1/socket.io.js"></script>
<script src="node_modules/revealjs_ws_server/index.js"></script>