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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Shadow element styles based on host attributes do not update"
href="https://bugs.webkit.org/show_bug.cgi?id=169706">169706</a>
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<th>Summary</th>
<td>Shadow element styles based on host attributes do not update
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>Product</th>
<td>WebKit
</td>
</tr>
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<th>Version</th>
<td>Safari Technology Preview
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>macOS 10.12
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>HTML DOM
</td>
</tr>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jan@component.kitchen
</td>
</tr>
<tr>
<th>CC</th>
<td>cdumez@apple.com
</td>
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<p>
<div>
<pre>See <a href="http://jsbin.com/gubocem/edit?html,output">http://jsbin.com/gubocem/edit?html,output</a>
Expect: Clicking the indicated element updates its `toggle` attribute, which should in turn apply a style rule changing the background color. This works as expected in Chrome.
Actual: Clicking the element updates the attribute, but not the style. Using the inspector to manually disable the rule for `background` and re-enable it causes the rule to be applied as expected.
We've encountered various flavors of this bug before: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [Shadow]: @host styles are not applied dynamically"
href="show_bug.cgi?id=112869">https://bugs.webkit.org/show_bug.cgi?id=112869</a> and <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Updating class name of a shadow host does not update the style applied by :host()"
href="show_bug.cgi?id=158900">https://bugs.webkit.org/show_bug.cgi?id=158900</a>.</pre>
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