From 55bdcc5ea892cfb3861ecb69842a0979906ee689 Mon Sep 17 00:00:00 2001
From: Kevin Van Cott <kevinvandy656@gmail.com>
Date: Fri, 17 Jul 2026 15:18:37 -0500
Subject: [PATCH] fix column resizing in alternate documents

---
 .../columnResizingFeature.utils.ts            |  2 +-
 .../columnResizingFeature.utils.test.ts       | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/packages/table-core/src/features/column-resizing/columnResizingFeature.utils.ts b/packages/table-core/src/features/column-resizing/columnResizingFeature.utils.ts
index b4d15dc939..76bcb5d8e3 100644
--- a/packages/table-core/src/features/column-resizing/columnResizingFeature.utils.ts
+++ b/packages/table-core/src/features/column-resizing/columnResizingFeature.utils.ts
@@ -239,7 +239,7 @@ export function header_getResizeHandler<
     }
 
     const contextDocument =
-      _contextDocument || typeof document !== 'undefined' ? document : null
+      _contextDocument || (typeof document !== 'undefined' ? document : null)
 
     const mouseEvents = {
       moveHandler: (e: MouseEvent) => onMove(e.clientX),
diff --git a/packages/table-core/tests/unit/features/column-resizing/columnResizingFeature.utils.test.ts b/packages/table-core/tests/unit/features/column-resizing/columnResizingFeature.utils.test.ts
index 825d00177e..01c8ea8dfd 100644
--- a/packages/table-core/tests/unit/features/column-resizing/columnResizingFeature.utils.test.ts
+++ b/packages/table-core/tests/unit/features/column-resizing/columnResizingFeature.utils.test.ts
@@ -259,6 +259,27 @@ describe('header_getResizeHandler', () => {
     expect(typeof handler).toBe('function')
   })
 
+  it('should attach listeners to an explicit context document', () => {
+    const table = makeTable(1)
+    const header = createTestResizeHeader(table)
+    const contextDocument = document.implementation.createHTMLDocument()
+    const addEventListener = vi.spyOn(contextDocument, 'addEventListener')
+    const handler = header_getResizeHandler(header as any, contextDocument)
+
+    handler({ type: 'mousedown', clientX: 100 })
+
+    expect(addEventListener).toHaveBeenCalledWith(
+      'mousemove',
+      expect.any(Function),
+      expect.anything(),
+    )
+    expect(addEventListener).toHaveBeenCalledWith(
+      'mouseup',
+      expect.any(Function),
+      expect.anything(),
+    )
+  })
+
   it('should not resize when column resizing is disabled', () => {
     const table = makeTable(1, {
       enableColumnResizing: false,