Attach the <template> on error

Author: foolip

source

@@ -139538,7 +139538,7 @@ dictionary <dfn dictionary>StorageEventInit</dfn> : <span>EventInit</span> {
    <li>
     <p>If <var>element</var> has a <code data-x="attr-contentname">contentname</code> attribute
     set to a non-empty value and <var>adjusted insertion location</var> is inside a
-    <code>template</code> element whose <code
+    <code>template</code> element which is not <span>connected</span> and whose <code
     data-x="attr-template-contentmethod">contentmethod</code> attribute is not in the <span
     data-x="attr-contentmethod-none-state">None</span> state:</p>
 
@@ -139588,8 +139588,30 @@ dictionary <dfn dictionary>StorageEventInit</dfn> : <span>EventInit</span> {
       </ol>
      </li>
 
-     <li><p>Otherwise, this is a <span data-x="parse-error-contentname-not-found">contentname-not-found</span>
-     <span>parse error</span>.</p></li>
+     <li>
+      <p>Otherwise:</p>
+
+      <ol>
+       <li><p>This is a <span
+       data-x="parse-error-contentname-not-found">contentname-not-found</span> <span>parse
+       error</span>.</p></li>
+
+       <li><p><span>Assert</span>: <var>template</var> is the <span>current node</span>.</p></li>
+
+       <li><p>Pop the <span>current node</span> off the <span>stack of open
+       elements</span>.</p></li>
+
+       <li><p>Run <span>insert an element at the adjusted insertion location</span> with
+       <var>template</var>.</p></li>
+
+       <li>
+        <p>Push <var>template</var> onto the <span>stack of open elements</span>.</p>
+
+        <p class="note">The above steps undo the effect of the <i>onlyAddToElementStack</i> argument
+        from the <span>insert a foreign element</span> call that created <var>template</var>,
+        inserting it where it would have been inserted otherwise. This is to signal an error.</p>
+      </ol>
+     </li>
     </ol>
    </li>