Play with this interactive JavaScript chart here: http://jennyknuth.github.io/collapsible-tree-javascript-diagram/
This diagram takes the work of coodict's "JavaScript in one pic" found here: https://github.com/coodict/javascript-in-one-pic, and puts it into a collapsible tree format using d3.js by Mike Bostock, found here: http://bl.ocks.org/mbostock/4339083.
I liked the idea of being able to interact with the complicated tree diagram, to expand and contract it at will in order to explore its different branches.
The entire image, fully expanded:
Image partially expanded:
