D3 V4 - What's new?

Based on the excellent Change log from @mbostock and other collected notes.

To run locally:

• clone this repo
• run make setup to install gems
• run make dev to start local development server.
• run make build to build the slides into the build/ folder of this repo.

When development server is running, navigate to http://localhost:4567 to see an index of all the slides.

These slides use:

• Remark.js
• Middleman (using a highly stripped down version of Remarkymark).