PseudoElementType should be a transferable property on adopt.

emilio · moz-wptsync-bot · commit 59c4eaf3be31 · 2026-04-20T14:32:47.000+01:00
Otherwise we lose it on adoption. Differential Revision: https://phabricator.services.mozilla.com/D295083 bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=2033117 gecko-commit: f79d79abb3b16d37010e802655de3d7fc332ca37 gecko-commit-git: 029906a044d38ecaf89e0ee0b80dfd5b6b892b10 gecko-reviewers: jjaschke, dom-core
diff --git a/html/rendering/replaced-elements/the-select-element/select-adopted-ref.html b/html/rendering/replaced-elements/the-select-element/select-adopted-ref.html
@@ -0,0 +1,4 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>CSS test reference</title>
+<iframe srcdoc="<select><option>ABC</option><option>DEF</option></select>"></iframe>
diff --git a/html/rendering/replaced-elements/the-select-element/select-adopted.html b/html/rendering/replaced-elements/the-select-element/select-adopted.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Select element rendering after adoption</title>
+<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
+<link rel="author" href="https://mozilla.com" title="Mozilla">
+<link rel=help href="https://bugzilla.mozilla.org/show_bug.cgi?id=2033117">
+<link rel=match href="select-adopted-ref.html">
+<select>
+  <option>ABC</option>
+  <option>DEF</option>
+</select>
+<iframe></iframe>
+<script>
+  let select = document.querySelector("select");
+  let iframe = document.querySelector("iframe");
+  iframe.contentWindow.document.body.appendChild(select);
+</script>
