<csstest def=":before with ::before" module="W3C Selectors" modulename="css3-modsel" number="168a" rev="1.0" date="1-january-2001" xmlns="http://www.example.org/css3tests">

<author>Ian Hickson</author>

<cssrules>
  span::before { background-color: red; content: 'FAILED'; }
  span:before { background-color: lime; content: 'PASSED'; }
</cssrules>

<code>
   <p xmlns="http://www.w3.org/1999/xhtml">This test has <span/>.</p>
   <p xmlns="http://www.w3.org/1999/xhtml">(If the previous line just reads "This test has ." then this test has failed.)</p>
</code>

</csstest>