From 1d64dc111a2d46cbc3cf5bff679438056b4a76f9 Mon Sep 17 00:00:00 2001
From: Joey Arhar <jarhar@chromium.org>
Date: Tue, 4 Nov 2025 13:02:48 -0800
Subject: [PATCH 1/3] Build list of selectedcontent elements to clear

This PR improves the "clear a select's non-primary selectedcontent
elements" algorithm by making it create a list of selectedcontent
elements to modify separately from modifying them in order to prevent
the list of elements to change while iterating.

Fixes https://github.com/whatwg/html/issues/11880
---
 source | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/source b/source
index e6c462593cb..62c0e69cd3a 100644
--- a/source
+++ b/source
@@ -59127,6 +59127,8 @@ interface <dfn interface>HTMLSelectedContentElement</dfn> : <span>HTMLElement</s
   <ol>
    <li><p>Let <var>passedFirstSelectedcontent</var> be false.</p></li>
 
+   <li><p>Let <var>selectedcontentElements</var> be « ».</p></li>
+
    <li>
     <p>For each <var>descendant</var> of <var>select</var>'s <span
     data-x="descendant">descendants</span> in <span>tree order</span> that is a
@@ -59136,8 +59138,16 @@ interface <dfn interface>HTMLSelectedContentElement</dfn> : <span>HTMLElement</s
      <li><p>If <var>passedFirstSelectedcontent</var> is false, then set
      <var>passedFirstSelectedcontent</var> to true.</p></li>
 
-     <li><p>Otherwise, run <span>clear a <code>selectedcontent</code></span> given
-     <var>descendant</var>.</p></li>
+     <li><p>Otherwise, <li><p><span data-x="list append">append</span> <var>descendant</var> to
+     <var>selectedcontentElements</var>.</p></li>
+    </ol>
+   </li>
+
+   <li>
+    <p>For each <var>selectedcontent</var> of <var>selectedcontentElements</var>:</p>
+
+    <ol>
+     <li><p><span>Clear a <code>selectedcontent</code></span> given <var>descendant</var>.</p></li>
     </ol>
    </li>
   </ol>

From dd2258afe238b42f08a63a8fb55063d4a873b2d1 Mon Sep 17 00:00:00 2001
From: Joey Arhar <jarhar@chromium.org>
Date: Wed, 12 Nov 2025 15:33:03 +0900
Subject: [PATCH 2/3] remove duplicate li

---
 source | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source b/source
index 62c0e69cd3a..a05affd0049 100644
--- a/source
+++ b/source
@@ -59138,7 +59138,7 @@ interface <dfn interface>HTMLSelectedContentElement</dfn> : <span>HTMLElement</s
      <li><p>If <var>passedFirstSelectedcontent</var> is false, then set
      <var>passedFirstSelectedcontent</var> to true.</p></li>
 
-     <li><p>Otherwise, <li><p><span data-x="list append">append</span> <var>descendant</var> to
+     <li><p>Otherwise, <span data-x="list append">append</span> <var>descendant</var> to
      <var>selectedcontentElements</var>.</p></li>
     </ol>
    </li>

From 85ef15c85b7595403be0c635817f32eb8678f1b8 Mon Sep 17 00:00:00 2001
From: Joey Arhar <jarhar@chromium.org>
Date: Wed, 12 Nov 2025 15:34:57 +0900
Subject: [PATCH 3/3] inline one step list

---
 source | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/source b/source
index a05affd0049..4ae78ea2dd6 100644
--- a/source
+++ b/source
@@ -59143,13 +59143,8 @@ interface <dfn interface>HTMLSelectedContentElement</dfn> : <span>HTMLElement</s
     </ol>
    </li>
 
-   <li>
-    <p>For each <var>selectedcontent</var> of <var>selectedcontentElements</var>:</p>
-
-    <ol>
-     <li><p><span>Clear a <code>selectedcontent</code></span> given <var>descendant</var>.</p></li>
-    </ol>
-   </li>
+   <li><p>For each <var>selectedcontent</var> of <var>selectedcontentElements</var>, <span>clear a
+   <code>selectedcontent</code></span> given <var>descendant</var>.</p></li>
   </ol>
   </div>