Presentation of a Node.js and Socket.io tutorial and step-by-step implementation of a chat service based on the official socket.io tutorial¹. You can check the slides on english or spanish on the following link:
Online Slides

This tutorial will cover the basics on Node.js, npm, Express and Socket.io developing a simple web application chat with a simple Html and Javascript client.

You can check the finished working example here
The slides are under license CC-by-sa and made with remark

Bibliography