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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>scrolling — legacy iframe</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}.warn{max-width:560px;padding:.75rem 1rem;background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;font-size:.8125rem;color:#92400e;margin-bottom:1rem}iframe{width:100%;max-width:400px;height:120px;border:1px solid #cbd5e1;border-radius:6px;background:#fff}.hint{margin-top:1rem;font-size:.8125rem;color:#64748b;max-width:560px}</style>

</head>

<body>

  <h1>scrolling on &lt;iframe&gt;</h1>

  <p class=warn><strong>Deprecated:</strong> <code>scrolling</code> is obsolete in HTML5. Use CSS <code>overflow</code> instead.</p>

  <iframe scrolling=yes title="Demo embed with legacy scrolling attribute" srcdoc="&lt;!DOCTYPE html&gt;&lt;html&gt;&lt;body style='font-family:system-ui;margin:0;padding:0.75rem;line-height:1.6;'&gt;&lt;p&gt;Line 1&lt;/p&gt;&lt;p&gt;Line 2&lt;/p&gt;&lt;p&gt;Line 3&lt;/p&gt;&lt;p&gt;Line 4&lt;/p&gt;&lt;p&gt;Line 5&lt;/p&gt;&lt;p&gt;Line 6&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;"></iframe>

  <p class=hint><code>scrolling="yes"</code> forced scrollbars in legacy browsers. Prefer <code>style="overflow:auto"</code>.</p>

</body>

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HTML scrolling Attribute — Legacy iframe scrolling