HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>srcdoc — basic 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 1rem;font-size:1.25rem;color:#0f172a}iframe{border:1px solid #cbd5e1;border-radius:6px;display:block;background:#fff}.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>Embedding content with srcdoc</h1>

  <iframe title="Inline srcdoc demo" srcdoc="&lt;p style='font-family:system-ui;margin:0;padding:0.75rem;'&gt;This is the embedded content within the iframe.&lt;/p&gt;" width=320 height=120></iframe>

  <p class=hint>No separate HTML file is required. The markup lives in the <code>srcdoc</code> string.</p>

</body>

</html>

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HTML srcdoc Attribute — Basic iframe Embed