lol_html 1.2.1

Streaming HTML rewriter/parser with CSS selector-based API
Documentation 
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<html><head>
  <title>:focus pseudo-class</title>
  <style type="text/css">a:focus { 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=" interact">
 </head>
 <body>
<p>The background color of <a href="#foo">anchors</a>
  in this page should turn <a href="#foo">to green</a> when they have the
  <a href="#foo">focus</a>.</p>

</body></html>