jQuery (edge), HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 1.8.3, HTML, CSS, JavaScript
The idea is a box with zero width and height. The actual width and height of the arrow is determined by the width of the border.
Input checked
inline element margin
Auto height on parent container with Absolute/Fixed Children
The Faux Columns method was first introduced by Dan Cederholm in his 2004 article for A List Apart, and in his book Web Standards Solutions.
margin/outline/border/padding