Parsing : vs ::Ian HicksonCSS 3 Module W3C Selectors Previous Syntax and parsing of unknown pseudo-classes and pseudo-elements Test # 15 of 15 of the interactive tests category Testing Parsing : vs :: ID 177a Date 2003-06-22 Revision 1.0 User interaction is required for this test.
When you select this text, it shouldn't go red.
p:selection { color: yellow; background: red; }
<p xmlns="http://www.w3.org/1999/xhtml">When you select this text, it shouldn't go red.</p>