From 0621d2d5a87b7eeb9075d0f2495d16c4e9d1ff72 Mon Sep 17 00:00:00 2001
From: _Zvbj <yytao001@gmail.com>
Date: Fri, 14 Aug 2026 03:52:56 +0800
Subject: [PATCH] fix: preserve PreviewGroup imageRender contract

---
 src/PreviewGroup.tsx        |  2 +-
 tests/previewGroup.test.tsx | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/PreviewGroup.tsx b/src/PreviewGroup.tsx
index 519e9080..2f9c7ebd 100644
--- a/src/PreviewGroup.tsx
+++ b/src/PreviewGroup.tsx
@@ -9,7 +9,7 @@ import type { TransformType } from './hooks/useImageTransform';
 import usePreviewItems from './hooks/usePreviewItems';
 import type { ImageElementProps, OnGroupPreview } from './interface';
 
-export interface GroupPreviewConfig extends InternalPreviewConfig {
+export interface GroupPreviewConfig extends Omit<InternalPreviewConfig, 'imageRender'> {
   current?: number;
   // Similar to InternalPreviewConfig but has additional current
   imageRender?: (
diff --git a/tests/previewGroup.test.tsx b/tests/previewGroup.test.tsx
index c13b6337..304005ba 100644
--- a/tests/previewGroup.test.tsx
+++ b/tests/previewGroup.test.tsx
@@ -151,6 +151,35 @@ describe('PreviewGroup', () => {
     expect(previewProgressElement.textContent).toEqual('current:1 / total:3');
   });
 
+  it('imageRender receives the current group index', () => {
+    const imageRender = jest.fn((originalNode, { current }) => (
+      <div data-testid="group-image-render" data-current={current}>
+        {originalNode}
+      </div>
+    ));
+
+    render(
+      <Image.PreviewGroup
+        items={['src1', 'src2']}
+        preview={{ open: true, imageRender }}
+      />,
+    );
+
+    expect(document.querySelector('[data-testid="group-image-render"]')).toHaveAttribute(
+      'data-current',
+      '0',
+    );
+    fireEvent.click(document.querySelector('.rc-image-preview-switch-next'));
+    expect(document.querySelector('[data-testid="group-image-render"]')).toHaveAttribute(
+      'data-current',
+      '1',
+    );
+    expect(imageRender).toHaveBeenLastCalledWith(
+      expect.anything(),
+      expect.objectContaining({ current: 1 }),
+    );
+  });
+
   it('Switch', () => {
     const previewProgressElementPath = '.rc-image-preview-progress';
     const { container } = render(