This is just a note for Future John. I was chatting to a friend on IRC who wanted to know how to extract the heading hierarchy from a HTML document. I wrote this code as a proof of concept implementation for him.
Today I saw on r/programming a post by Julia Evans titled A little bit of plain JavaScript can do a lot. She discusses some of JavaScript’s more powerful contemporary features.
Found out (over here) that the colour codes in Firebug are:
Format Description Bold Black Objects Black DOM objects get in gray "Getter" functions Bold green User functions Green DOM functions Bold Red Constructor functions