Here are the 6 most obscure, least-used, and utterly fascinating HTML/CSS techniques:
A relic from the dark ages of HTML, the
For when you want to select elements based on attributes, because who needs classes, right?
When you want to select elements based on attributes, but with more words.
For when you need to add more classes to your HTML, but with more letters.
When you want to create elements that exist in the DOM, but not in reality.
A look at what's to come, or maybe not. We're not really sure.