From ff34dbc43a24652e464d2ef455fbb5cc17708f48 Mon Sep 17 00:00:00 2001
From: Federico Zivolo <5382443+FezVrasta@users.noreply.github.com>
Date: Mon, 8 Apr 2024 10:13:40 +0200
Subject: [PATCH] check for text element node existance

---
 packages/mermaid/src/diagrams/sequence/svgDraw.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/mermaid/src/diagrams/sequence/svgDraw.js b/packages/mermaid/src/diagrams/sequence/svgDraw.js
index ed992f9198..560af85227 100644
--- a/packages/mermaid/src/diagrams/sequence/svgDraw.js
+++ b/packages/mermaid/src/diagrams/sequence/svgDraw.js
@@ -243,12 +243,15 @@ export const drawText = function (elem, textData) {
     } else {
       textElem.text(text);
     }
+
+    const textElemNode = (textElem._groups || textElem)[0][0]
     if (
+      textElemNode &&
       textData.valign !== undefined &&
       textData.textMargin !== undefined &&
       textData.textMargin > 0
     ) {
-      textHeight += (textElem._groups || textElem)[0][0].getBBox().height;
+      textHeight += textElemNode.getBBox().height;
       prevTextHeight = textHeight;
     }