Comment by tomblomfield

This looks nice, but most of the hard work is done elsewhere.

https://github.com/ankane/groupdate (by the same author) makes it simple to output the right JSON grouped by date (awesome!)

Highcharts/Google charts make it simple to turn json into JS graphs.

This library provides glue so you don't have to read the highchart docs. Might save some people some time, I guess...