From 19a8cab58598af8b8c4c6d5df4241565f925e454 Mon Sep 17 00:00:00 2001
From: Luccas Correa <luccas@harbourshare.com>
Date: Thu, 12 Mar 2026 14:14:37 -0300
Subject: [PATCH] fix(super-editor): guard against style definition nodes
 without elements

---
 .../get-default-style-definition.js           |  2 ++
 .../get-default-style-definition.test.js      | 22 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.js b/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.js
index eca2f54d7..2a388a4d5 100644
--- a/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.js
+++ b/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.js
@@ -24,6 +24,8 @@ export const getDefaultStyleDefinition = (defaultStyleId, docx) => {
   const firstMatch = elementsWithId[0];
   if (!firstMatch) return result;
 
+  if (!firstMatch.elements) return result;
+
   const qFormat = elementsWithId.find((el) => {
     const qFormat = el.elements.find((innerEl) => innerEl.name === 'w:qFormat');
     return qFormat;
diff --git a/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.test.js b/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.test.js
index ec4e91340..6d9bb8e61 100644
--- a/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.test.js
+++ b/packages/super-editor/src/core/super-converter/docx-helpers/get-default-style-definition.test.js
@@ -38,6 +38,28 @@ describe('getDefaultStyleDefinition', () => {
     expect(res).toEqual({ lineSpaceBefore: null, lineSpaceAfter: null });
   });
 
+  it('returns minimal object when matching style has no elements', () => {
+    const docx = {
+      'word/styles.xml': {
+        elements: [
+          {
+            elements: [
+              {
+                name: 'w:style',
+                attributes: { 'w:styleId': 'Heading1' },
+              },
+            ],
+          },
+        ],
+      },
+    };
+
+    const res = getDefaultStyleDefinition('Heading1', docx);
+
+    expect(res).toEqual({ lineSpaceBefore: null, lineSpaceAfter: null });
+    expect(parseMarks).not.toHaveBeenCalled();
+  });
+
   it('parses style definition with spacing, indent, flags, and marks', () => {
     const docx = {
       'word/styles.xml': {