DemoIt

DemoIt is a tool that helps you create beautiful live-coding demonstrations.

Why?

I'm doing lots of live-coding during conferences and I like tools like reveal.js to create slides. What I wanted was a tool that has some of the properties of reveal.js but with capabilities to code and run commands in front of the audience.

Two things are really important to me:

For a given presentation, the slides should live in the same repository as the code.
The tool should allow context-switching-less live coding demos. Attendees don't want to watch me switching between a browser, an IDE and a terminal all the time.

This is how I came up with DemoIt.

How?

DemoIt is a small command line tool written in Go. It serves rich web content composed of text, images and smart web components.

Those web components make most of the magic.

One component displays multi-tab ttys that can be used to run any command.
Another is a web browser view that auto refreshes itself.
Another is a code viewer with highlighing and tabs that looks like a real IDE,

Install

Download binary from GitHub

curl -L -odemoit https://github.com/dgageot/demoit/releases/download/v1.0/demoit-`uname -s | tr '[:upper:]' '[:lower:]'`-`uname -m`
sudo install demoit /usr/local/bin/demoit

Add shell font

To have a correct display in the web terminal, it's better to install the font Inconsolata for Powerline on your computer. This font can be found here.

Get started from a Sample

# Create an empty directory
cd $HOME; mkdir my-demoit-presentation; cd $HOME/my-demoit-presentation
# Download a sample demo
curl -L https://github.com/dgageot/demoit/archive/master.tar.gz | tar xvf - --strip-components=2 demoit-master/sample
# Run demoit
demoit

Then, browse to http://localhost:8888

Pro tip: Run demoit -dev instead and enjoy live reload each time you change the content of the slides.

How do I customize my presenttion then?

Basically, the idea is to:

Write content in demoit.html at the root of the project. This file contains all the html slides separated with ---.
Add images, fonts and scripts in the .demoit folder at the root of the project.
Customize the style sheet in .demoit/style.css.

Contribute

Build from sources

git clone https://github.com/dgageot/demoit.git
cd demoit
go install

This requires Go 1.19 or later.

dgageot / demoit