lol_html 1.2.1

Streaming HTML rewriter/parser with CSS selector-based API
Documentation 
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<!DOCTYPE html><html><head>
  <title>NEGATED :root pseudo-class</title>
  <style type="text/css">html:not(:root), test:not(:root) { background-color: red; }
p { background-color: lime; }
</style>
  <link rel="author" title="Daniel Glazman" href="http://glazman.org/">
  <link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content="">
 </head>
 <body>
 <div>
  <p>This paragraph should have a green background and there should be no red anywhere.</p>
 </div>

</body></html>