HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>onpagehide — body 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}textarea{width:100%;max-width:420px;min-height:80px;padding:.5rem;border:1px solid #cbd5e1;border-radius:8px;font-family:inherit;font-size:.875rem}#status{margin-top:.75rem;padding:.75rem 1rem;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;font-size:.875rem;max-width:420px}</style>

</head>

<body onpagehide=handlePageHide()>

  <h1>onpagehide on body</h1>

  <p>Type a draft, then navigate away. Reload to see it restored.</p>

  <textarea id=draft placeholder="Start typing…"></textarea>

  <div id=status>Draft not saved yet.</div>



  <script>var draft=document.getElementById("draft"),status=document.getElementById("status"),saved=sessionStorage.getItem("pagehide-draft");function handlePageHide(){sessionStorage.setItem("pagehide-draft",draft.value)}saved&&(draft.value=saved,status.textContent="Restored draft from last pagehide save.")</script>

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HTML onpagehide Attribute — body handler