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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>.even() after filter</title>
</head>
<body>
  <ul>
    <li class="active">A</li>
    <li>B</li>
    <li class="active">C</li>
    <li class="active">D</li>
    <li>E</li>
  </ul>
  <p>Even among .active only: A and D (indexes 0, 2 in filtered set)</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("li").filter(".active").even().css("font-weight", "bold");
  </script>
</body>
</html>

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