CSS 3 Module <== Test # ==>
W3C Selectors 119 of 296
Testing Date Revision
Negation pseudo-class cannot be an argument of itself (ID #83) 2001-07-11 1.0

This paragraph should have a green background

p { background-color : lime }
p:not(:not(p)) { background-color : red }
<p>This paragraph should have a green background</p>