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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery .removeClass blue</title>

  <style>

    p { margin: 4px; font-size: 16px; font-weight: bolder; }

    .blue { color: blue; }

    .under { text-decoration: underline; }

    .highlight { background: yellow; }

  </style>

</head>

<body>

  <p class="blue under">Hello</p>

  <p class="blue highlight">and</p>

  <p class="blue under">then</p>

  <p class="blue highlight">Goodbye</p>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $("p").even().removeClass("blue");

  </script>

</body>

</html>

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jQuery .removeClass('blue') — even paragraphs (Try It)