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<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>Dynamic char Example</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 1rem;font-size:1.25rem;color:#0f172a}table{max-width:420px}.hint{margin-top:1rem;font-size:.8125rem;color:#64748b;max-width:420px}</style>

</head>

<body>

  <h1>Dynamic char alignment</h1>

  <table border=1>

    <tr>

      <th>Name</th>

      <th id=scoreHeader>Score</th>

    </tr>

    <tr>

      <td>Alice</td>

      <td>12.5</td>

    </tr>

    <tr>

      <td>Bob</td>

      <td>9.75</td>

    </tr>

    <tr>

      <td>Carol</td>

      <td>100.2</td>

    </tr>

  </table>

  <p class=hint>JavaScript sets <code>align="char"</code> and <code>char="."</code> on the Score header cell.</p>

  <script>let scoreHeader=document.getElementById("scoreHeader");scoreHeader.setAttribute("align","char"),scoreHeader.setAttribute("char",".")</script>

</body>

</html>

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HTML char Attribute — Dynamic JavaScript