I think from what I can scan underscore isn't being used at all and jquery is only used for $.each and $('svg') at the end of the demo. You don't need those l

I think from what I can scan underscore isn't being used at all and jquery is only used for $.each and $('svg') at the end of the demo. You don't need those libraries. If you didn't even want d3 you could have a task pre-generate the svgs.