HTML Code

<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=UTF-8>
  <meta name=viewport content="width=device-width,initial-scale=1">
  <title>manifest — legacy AppCache</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}.warn{max-width:520px;padding:.75rem 1rem;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;font-size:.8125rem;color:#92400e;margin-bottom:1rem}pre{max-width:520px;margin:0;padding:.75rem 1rem;background:#0f172a;color:#e2e8f0;border-radius:8px;font-size:.75rem;overflow-x:auto}.hint{margin-top:1rem;font-size:.8125rem;color:#64748b;max-width:520px}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>
</head>
<body>
  <h1>manifest on &lt;html&gt;</h1>
  <p class=warn><strong>Deprecated:</strong> Application Cache was removed from browsers. This markup is shown for historical recognition only.</p>
  <p>Legacy HTML (AppCache is no longer supported):</p>
  <pre>&lt;html manifest="example.appcache"&gt;</pre>
  <p style=margin-top:1rem>Sample cache manifest file (<code>example.appcache</code>):</p>
  <pre>CACHE MANIFEST
# v1 — offline resources
index.html
styles.css
app.js
logo.png

NETWORK:
*

FALLBACK:
/offline.html</pre>
  <p class=hint>The <code>manifest</code> attribute on <code>&lt;html&gt;</code> pointed to this file. Modern apps use Service Workers instead.</p>
</body>
</html>

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HTML manifest Attribute — Legacy AppCache Markup