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<base href="https://bugs.webkit.org/" />
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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 - Shadow DOM: Projected light DOM children do not transition"
href="https://bugs.webkit.org/show_bug.cgi?id=160866">160866</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Shadow DOM: Projected light DOM children do not transition
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Safari Technology Preview
</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>HTML DOM
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>webkit@keanulee.com
</td>
</tr>
<tr>
<th>CC</th>
<td>cdumez@apple.com
</td>
</tr></table>
<p>
<div>
<pre>Repro: <a href="http://jsbin.com/jaqofi/2/edit?html,output">http://jsbin.com/jaqofi/2/edit?html,output</a>
As soon as a shadow root is added to an element, its children do not have CSS transitions. In this example:
span {
transition: background 2s;
}
body.green span {
background: green;
}
...
<button onclick="document.body.classList.toggle('green')">Transition</button>
<div>
<span>No shadow root</span>
</div>
<div class="shadow">
<span>Projected in shadow root</span>
</div>
...
document.querySelector('div.shadow').attachShadow({mode:'open'}).innerHTML = '<slot></slot>';
the second span does not transition.</pre>
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