From c7471f17558856c8f91dec7b8e4908f84c4df350 Mon Sep 17 00:00:00 2001
From: MrCoder <eagle.xiao@gmail.com>
Date: Sat, 3 Dec 2022 19:10:05 +1100
Subject: [PATCH] Fixed the issue that theme-switch does not work on docs.

---
 packages/mermaid/src/docs/.vitepress/theme/mermaid.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/mermaid/src/docs/.vitepress/theme/mermaid.ts b/packages/mermaid/src/docs/.vitepress/theme/mermaid.ts
index b287346f9..fef090ea9 100644
--- a/packages/mermaid/src/docs/.vitepress/theme/mermaid.ts
+++ b/packages/mermaid/src/docs/.vitepress/theme/mermaid.ts
@@ -8,7 +8,9 @@ try {
 }
 
 export const render = async (id: string, code: string, config: MermaidConfig): Promise<string> => {
-  mermaid.initialize(config);
+  // make a clone of config, so we don't mutate the original
+  const mermaidConfig = { ...config };
+  mermaid.initialize(mermaidConfig);
   const svg = await mermaid.renderAsync(id, code);
   return svg;
 };