Simple Html debug via CSS

Add the following css lines to your CSS theme, possibly at the end

1div::before {
2content:" C:" attr(class) ""
3}
4
5*::before,*::after {
6color:red;
7font-weight:100;
8font-size:2.0em
9}

and div classes will showup easily. Very handly while customizing WoooordPress :) This page show a demo.