From f8d82336b36a3ad8d13ce454f29b339973ec4c9c Mon Sep 17 00:00:00 2001
From: Thomas Haaf <thomas@smart-sign.com>
Date: Tue, 25 Jun 2024 10:39:17 +0200
Subject: [PATCH] fix missing text on mermaid diagrams

---
 common/src/markdown-converter-common.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/src/markdown-converter-common.ts b/common/src/markdown-converter-common.ts
index 6d0f14b..da72dba 100644
--- a/common/src/markdown-converter-common.ts
+++ b/common/src/markdown-converter-common.ts
@@ -136,7 +136,7 @@ export abstract class MarkdownConverter {
       .then((parsedInput) =>
         this.dompurify.sanitize(parsedInput, {
           // Allowed tags and attributes inside markdown
-          ADD_TAGS: ["iframe"],
+          ADD_TAGS: ["iframe", "foreignObject"], // foreignObject is needed for SVGs that show html tags inside them like mermaid-diagrams
           ADD_ATTR: ["allow", "allowfullscreen", "frameborder", "scrolling"],
         }),
       );