From 4d1d1c36de1276f179d653b073553e02878f530e Mon Sep 17 00:00:00 2001
From: ischanx <ischanx@foxmail.com>
Date: Sat, 4 Mar 2023 00:06:03 +0800
Subject: [PATCH] fix(squence): getBBox() returns zero

---
 packages/mermaid/src/utils.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/mermaid/src/utils.ts b/packages/mermaid/src/utils.ts
index 69d0ac2ef..0c4b9d1a8 100644
--- a/packages/mermaid/src/utils.ts
+++ b/packages/mermaid/src/utils.ts
@@ -772,6 +772,9 @@ export const calculateTextDimensions: (
           .style('font-family', fontFamily);
 
         const bBox = (textElem._groups || textElem)[0][0].getBBox();
+        if (bBox.width === 0 && bBox.height === 0) {
+          throw new Error('svg element not in render tree');
+        }
         dim.width = Math.round(Math.max(dim.width, bBox.width));
         cheight = Math.round(bBox.height);
         dim.height += cheight;