A new value of the display property that will enable containers to clear floats. Needs Chrome Canary or Firefox Nightlies.
The following item is a wrapper containing a block that is floated left.
The border on the containing block only wraps the text as the floated element is taken out of flow.
The content following the box will also rise up and wrap around the float unless we set it to clear.
In this next item we use a clearfix hack to cause the wrapper to clear the floated item.
CSS now has a way to cause elements to clear floats. We set the value of display to flow-root and our floated box is cleared.