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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>start — JavaScript 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 .75rem;font-size:1.25rem;color:#0f172a}ol{margin:.5rem 0 0;padding-left:1.5rem}.hint{font-size:.8125rem;color:#64748b;margin-top:.75rem}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>

</head>

<body>

  <h1>Dynamic start value</h1>

  <p>The script sets <code>ol.start = 10</code> after the page loads:</p>



  <ol id=dynamicList>

    <li>First Item</li>

    <li>Second Item</li>

    <li>Third Item</li>

  </ol>



  <script>document.getElementById("dynamicList").start=10</script>



  <p class=hint>Markers display 10, 11, 12.</p>

</body>

</html>

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HTML start Attribute — dynamic JavaScript