Re: [whatwg/dom] Remove "allow declarative shadow roots" (PR #1478)

@noamr commented on this pull request.



> @@ -5017,7 +5017,7 @@ and an optional <a for=/>document</a> <dfn export for="clone a node"><var>docume
     <ol>
      <li><p>Set <var>copy</var>'s <a for=Document>encoding</a>, <a for=Document>content type</a>,
      <a for=Document>URL</a>, <a for=Document>origin</a>, <a for=Document>type</a>,
-     <a for=Document>mode</a>, and <a for=Document>allow declarative shadow roots</a>, to those of
+     and <a for=Document>mode</a>, to those of
      <var>node</var>.

https://whatpr.org/html/12624/parsing.html#allow-declarative-shadow-roots is false by default, and https://xhr.spec.whatwg.org/#document-response uses the default settings, so I think spec-wise this is OK.

There is a test for this [here](https://github.com/web-platform-tests/wpt/blob/master/shadow-dom/declarative/declarative-shadow-dom-opt-in.html#L121-L131).

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Received on Thursday, 2 July 2026 14:53:17 UTC