webtreemap New 2017-Oct-16: master is now webtreemap v2, a complete rewrite with bug fixes, more features, and a different (simpler) API. If you're looking for the old webtreemap, see the v1 branch. A simple treemap implementation using web technologies (DOM nodes, CSS styling and transitions) rather than a big canvas/svg/plugin. It's usable as a library as part of a larger web app, but it also in