Clearing A Float Container is a shitty title, I think, but the article illustrates the solution to a problem that has dogged me for a while: how can you make a container expand in height so as to fully contain a floating element inside it. Floats typically extend over the bottom border of their containers.

See how this float no longer protrudes out of the containing box, with no extra clearing element used in the container!

This float container has a class attribute of "clearfix", which applies the :after fix, or the Holly hack, depending on the browser.

Well, anyway it works outside of Blogger.