HTML Code

<!DOCTYPE html>



<html lang=en>



<head>



  <meta charset=UTF-8>



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



  <title>onbeforeprint — inline handler</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}button{padding:.5rem 1rem;font:inherit;cursor:pointer;border-radius:6px;border:1px solid #1d4ed8;background:#2563eb;color:#fff}.status{margin-top:1rem;padding:.75rem 1rem;background:#fef9c3;border:1px solid #fde047;border-radius:8px;font-size:.8125rem;max-width:480px}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>



</head>



<body onbeforeprint=handleBeforePrint()>



  <h1>onbeforeprint on body</h1>



  <p>Click Print. <code>onbeforeprint</code> runs when the print dialog opens — before you print or cancel.</p>



  <button type=button onclick=window.print()>Print this page</button>



  <div class=status id=status>Waiting for print dialog to open…</div>





  <script>function handleBeforePrint(){document.getElementById("status").innerHTML="<strong>beforeprint fired!</strong> Prepare print layout here — hide nav, add classes, etc."}</script>



</body>



</html>

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HTML onbeforeprint Attribute — Inline Handler on body