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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - adoptNode() changes css class to lowercase for document loaded with XHR responseType = "document""
href="https://bugs.webkit.org/show_bug.cgi?id=159555">159555</a>
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<th>Summary</th>
<td>adoptNode() changes css class to lowercase for document loaded with XHR responseType = "document"
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>Safari 9
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>HTML DOM
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>theblueslate@gmail.com
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<th>CC</th>
<td>cdumez@apple.com
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<pre>For a full demonstration, see <a href="https://jsfiddle.net/theblueslate/wxo7zst5/2/">https://jsfiddle.net/theblueslate/wxo7zst5/2/</a>
I use XHR with responseType = "document" to load html fragments dynamically. To include them in the document, I use adoptNode(). However, if the XHR parsed document is from a document in quirks mode, and the contents contains a css class that includes an uppercase letter, then adoptNode() imports the element with the css class in lowercase.
importNode() doesn't have this problem, but is more heavyweight than adoptNode().
I can reproduce this problem on Safari 9.1.1 on El Capitan. I also have the same problem on iOS 9.3.2. This problem does not occur on Chrome 51 or IE11.</pre>
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