From 4c26fe224bda24d6807e86073730ea6f40bcc8d1 Mon Sep 17 00:00:00 2001
From: Knut Sveidqvist <knsv@sveido.com>
Date: Fri, 13 Sep 2024 14:02:11 +0200
Subject: [PATCH] Adding case check

---
 .../mermaid/src/rendering-util/rendering-elements/nodes.js     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/mermaid/src/rendering-util/rendering-elements/nodes.js b/packages/mermaid/src/rendering-util/rendering-elements/nodes.js
index 5138b1ede..960d93016 100644
--- a/packages/mermaid/src/rendering-util/rendering-elements/nodes.js
+++ b/packages/mermaid/src/rendering-util/rendering-elements/nodes.js
@@ -321,6 +321,9 @@ export const insertNode = async (elem, node, renderOptions) => {
   if (!shapes[node.shape]) {
     throw new Error(`No such shape: ${node.shape}. Please check your syntax.`);
   }
+  if (node.shape !== node.shape.toLowerCase()) {
+    throw new Error(`No such shape: ${node.shape}. Shape names should be lowercase.`);
+  }
   if (node.link) {
     // Add link when appropriate
     let target;