From ba28fa46219af625cb68fe2364f62ccc528fb605 Mon Sep 17 00:00:00 2001
From: AustinMroz <austin@comfy.org>
Date: Fri, 8 Aug 2025 15:58:31 -0500
Subject: [PATCH] Support preview display on subgraphNodes (#4814)

---
 src/scripts/app.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index 2baed3618..fbb3c25be 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -727,7 +727,12 @@ export class ComfyApp {
       revokePreviewsByExecutionId(displayNodeId)
       const blobUrl = URL.createObjectURL(blob)
       // Preview cleanup is handled in progress_state event to support multiple concurrent previews
-      setNodePreviewsByExecutionId(displayNodeId, [blobUrl])
+      const nodeParents = displayNodeId.split(':')
+      for (let i = 1; i <= nodeParents.length; i++) {
+        setNodePreviewsByExecutionId(nodeParents.slice(0, i).join(':'), [
+          blobUrl
+        ])
+      }
     })
 
     api.init()