HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery .prevUntil section header</title>

  <style>

    table { border-collapse: collapse; }

    td, th { border: 1px solid #ccc; padding: 8px 12px; }

    tr.section-header { background: #333; color: #fff; font-weight: bold; }

    tr.in-range { background: #e8f4ff; }

    tr.selected { background: #fff3cd; }

  </style>

</head>

<body>

  <table>

    <tr class="section-header"><td colspan="2">Q1 Sales</td></tr>

    <tr><td>Jan</td><td>100</td></tr>

    <tr><td>Feb</td><td>120</td></tr>

    <tr class="selected"><td>Mar</td><td>140</td></tr>

    <tr class="section-header"><td colspan="2">Q2 Sales</td></tr>

    <tr><td>Apr</td><td>150</td></tr>

  </table>

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

  <script>

    $("tr.selected").prevUntil(".section-header").addClass("in-range");

  </script>

</body>

</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

jQuery .prevUntil('.section-header') — table (Try It)