HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>scope — JavaScript</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{border-collapse:collapse;width:100%;max-width:320px;font-size:.875rem}td,th{border:1px solid #cbd5e1;padding:.5rem .75rem;text-align:left}th{background:#f8fafc}button{margin-top:1rem;padding:.5rem 1rem;font:inherit;cursor:pointer;border-radius:6px;border:1px solid #cbd5e1;background:#fff}#out{margin-top:.75rem;font-size:.8125rem;color:#64748b;max-width:320px}</style>

</head>

<body>

  <h1>th.scope in JavaScript</h1>

  <table>

    <tr>

      <th id=dynamicHeader>Name</th>

      <td>John</td>

    </tr>

    <tr>

      <th>Age</th>

      <td>30</td>

    </tr>

  </table>

  <button type=button id=setScope>Set scope="row" on Name header</button>

  <p id=out>Click to assign scope dynamically.</p>

  <script>document.getElementById("setScope").addEventListener("click",(function(){var e=document.getElementById("dynamicHeader");e.scope="row",document.getElementById("out").textContent='dynamicHeader.scope = "'+e.scope+'"'}))</script>

</body>

</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

HTML scope Attribute — Dynamic scope with JavaScript