From 8b3057f27c45cbb281cef50102f1fd9360534bae Mon Sep 17 00:00:00 2001
From: darshanr0107 <darshan@mermaidchart.com>
Date: Tue, 30 Sep 2025 12:27:53 +0530
Subject: [PATCH] fix: guard nodeDb[node.id] against undefined

on-behalf-of: @Mermaid-Chart <hello@mermaidchart.com>
---
 packages/mermaid-layout-elk/src/render.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/mermaid-layout-elk/src/render.ts b/packages/mermaid-layout-elk/src/render.ts
index dbd23d381..2cb12e035 100644
--- a/packages/mermaid-layout-elk/src/render.ts
+++ b/packages/mermaid-layout-elk/src/render.ts
@@ -165,6 +165,7 @@ export const render = async (
         domId: { node: () => any; attr: (arg0: string, arg1: string) => void };
       }) {
         if (node) {
+          nodeDb[node.id] ??= {};
           nodeDb[node.id].offset = {
             posX: node.x + relX,
             posY: node.y + relY,