Forbid nesting <details> in the same exclusive accordion

Fixes whatwg#9968.
josepharhar · Dec 20, 2023 · 8027fc5 · 8027fc5
1 parent f33d8b0
commit 8027fc5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/source b/source
@@ -60194,6 +60194,9 @@ interface <dfn interface>HTMLDetailsElement</dfn> : <span>HTMLElement</span> {
   data-x="attr-details-open">open</code> attributes in the markup.  This requirement on authors
   forbids such misleading markup.</p>
 
+  <p>A document must not contain a <code>details</code> element that is a descendant of another
+  <code>details</code> element in the same <span>details name group</span>.</p>
+
   <p>Documents that use the <code data-x="attr-details-name">name</code> attribute to group multiple
   related <code>details</code> elements should keep those related elements together in a containing
   element (such as a <code>section</code> element).</p>