I noticed this uses AngularJS under the hood. How would it play in an existing AngularJS app - can we install it as a module? Also, how would one do stacked bar charts?
We haven't exposed it on the site yet, but if you have an existing Angular.js app then you can import Variance as an Angular module for a cost of about 34kB.
Email variancecharts@generalreactives.com and we can get you squared away.
Very cool. Are you concerned at all about Angular 2.0 and potentially having to rewrite major parts?
Variance is currently built on Angular, but that's not part of the public API contract.
It's very likely that at a future point we will whip up a faster/leaner DOM compiler and drop 100kB of Angular features that Variance does not need.