To get started, clone the project and install the dependencies:
# Using npm
npm install
# Using Yarn
yarn
After that, you can process the CSS by running:
# Using npm
npm run build
# Using Yarn
yarn run build
Load up ./index.html
in your browser and you're off to the races!
In plugins/simple-buttons/index.js
you'll find an example of a plugin that adds new component classes.