From f8e9e71b08690741b0c78c3d5901e89a6730f408 Mon Sep 17 00:00:00 2001
From: gh-fixes <gh-fixes@localhost>
Date: Fri, 30 Oct 2026 11:20:41 +0000
Subject: [PATCH] fix: report actual parent as MutationObserver childList
 target (#300)

---
 cjs/interface/mutation-observer.js  |  2 +-
 esm/interface/mutation-observer.js  |  2 +-
 test/interface/mutation-observer.js | 51 +++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/cjs/interface/mutation-observer.js b/cjs/interface/mutation-observer.js
index 1bd79217..7977a091 100644
--- a/cjs/interface/mutation-observer.js
+++ b/cjs/interface/mutation-observer.js
@@ -91,7 +91,7 @@ const moCallback = (element, parentNode) => {
           ) {
             const {callback, records, scheduled} = observer;
             records.push(createRecord(
-              'childList', target, element,
+              'childList', parentNode || element.parentNode, element,
               parentNode ? [] : [element], parentNode ? [element] : []
             ));
             if (!scheduled) {
diff --git a/esm/interface/mutation-observer.js b/esm/interface/mutation-observer.js
index 1549f35e..969ea790 100644
--- a/esm/interface/mutation-observer.js
+++ b/esm/interface/mutation-observer.js
@@ -89,7 +89,7 @@ export const moCallback = (element, parentNode) => {
           ) {
             const {callback, records, scheduled} = observer;
             records.push(createRecord(
-              'childList', target, element,
+              'childList', parentNode || element.parentNode, element,
               parentNode ? [] : [element], parentNode ? [element] : []
             ));
             if (!scheduled) {
diff --git a/test/interface/mutation-observer.js b/test/interface/mutation-observer.js
index 49914ad6..625f78e2 100644
--- a/test/interface/mutation-observer.js
+++ b/test/interface/mutation-observer.js
@@ -233,4 +233,55 @@ let {document: newDoc} = parseHTML('<html />');
     true,
     'MutationObserver addedNodes on html'
   );
+  args = null;
+  observer.disconnect();
+  const bodyTarget = newDoc.body;
+  observer.observe(newDoc, {
+    childList: true,
+    subtree: true
+  });
+  bodyTarget.appendChild(newDoc.createTextNode(''));
+  await milliseconds(10);
+
+  assert(
+    checkRecord(
+      {target: bodyTarget, type: "childList", addedNodes: [bodyTarget.lastChild]},
+      args[0]
+    ),
+    true,
+    'MutationObserver target is the parent of an inserted text node'
+  );
+  args = null;
+  const nestedDiv = newDoc.createElement('div');
+  bodyTarget.appendChild(nestedDiv);
+  await milliseconds(10);
+  args = null;
+  const spanChild = newDoc.createElement('span');
+  nestedDiv.appendChild(spanChild);
+  await milliseconds(10);
+
+  assert(
+    checkRecord(
+      {target: nestedDiv, type: "childList", addedNodes: [spanChild]},
+      args[0]
+    ),
+    true,
+    'MutationObserver target is the parent of an inserted element'
+  );
+  args = null;
+  const removedChild = newDoc.createElement('b');
+  bodyTarget.appendChild(removedChild);
+  await milliseconds(10);
+  args = null;
+  bodyTarget.removeChild(removedChild);
+  await milliseconds(10);
+
+  assert(
+    checkRecord(
+      {target: bodyTarget, type: "childList", removedNodes: [removedChild]},
+      args[0]
+    ),
+    true,
+    'MutationObserver target is the old parent of a removed child'
+  );
 })();