No-Library (pure JS), HTML, CSS, JavaScript
Originally identified on Stack Overflow http://stackoverflow.com/q/21567678/54680
jQuery Compat (edge), HTML, CSS, JavaScript
Clicking on the inner element should propagate the :active state up through its ancestor tree.
jQuery 2.0, HTML, CSS, JavaScript
jQuery 1.9.1, HTML, CSS, JavaScript
Featured in http://sampsonblog.com/489/creating-a-autofocus-polyfill