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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Feature request: Auto-resize iframes based on content"
   href="https://bugs.webkit.org/show_bug.cgi?id=153952">153952</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Feature request: Auto-resize iframes based on content
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Frames
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>craig+webkit&#64;craigfrancis.co.uk
          </td>
        </tr></table>
      <p>
        <div>
        <pre>After the recent removal of the `&#64;seamless` attribute on the `&lt;iframe&gt;` from the WHATWG spec:

<a href="https://github.com/whatwg/html/issues/331">https://github.com/whatwg/html/issues/331</a>

We still need to consider the problem of setting the height of iframes, so they contain their content without scroll bars.

As discussed at:

<a href="https://github.com/whatwg/html/issues/555">https://github.com/whatwg/html/issues/555</a>
<a href="https://lists.w3.org/Archives/Public/www-style/2016Jan/0236.html">https://lists.w3.org/Archives/Public/www-style/2016Jan/0236.html</a>
<a href="https://lists.w3.org/Archives/Public/www-style/2016Feb/0004.html">https://lists.w3.org/Archives/Public/www-style/2016Feb/0004.html</a>

The solution may simply involve the CSS:

    #iframe { height: max-content; }

And a header on the framed content, rather than custom/buggy JavaScript.

-----

I'm keeping my notes on:

<a href="https://github.com/craigfrancis/iframe-height">https://github.com/craigfrancis/iframe-height</a></pre>
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