From 526c265e5247cc934128816daa6d9d8957160dd1 Mon Sep 17 00:00:00 2001
From: Joakim <joakim@jnss.me>
Date: Fri, 29 Aug 2025 23:22:06 +0200
Subject: [PATCH] Fix infinite recursion in markdown parsing
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🐛 Critical Fix: Maximum call stack exceeded error
✅ Solution: Properly handle regex match result in parseMarkdownToBlocks()

🔧 Issue:
- line.match(/^#+/)[0].length caused infinite recursion
- Browser crashed when editing rich content with headings

🔧 Fix:
- Store regex match result in variable first
- Add null check before accessing match result
- Prevents stack overflow when parsing markdown headings

⚡ Now safe to edit content with # headings without crashes
---
 demo-site/insertr/insertr.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/demo-site/insertr/insertr.js b/demo-site/insertr/insertr.js
index 6da8a14..e6fdb16 100644
--- a/demo-site/insertr/insertr.js
+++ b/demo-site/insertr/insertr.js
@@ -302,7 +302,8 @@ class Insertr {
             // Check for headings
             if (line.match(/^#{1,6}\s/)) {
                 if (currentBlock) blocks.push(currentBlock);
-                const level = line.match(/^#+/)[0].length;
+                const hashMatch = line.match(/^#+/);
+                const level = hashMatch ? hashMatch[0].length : 1;
                 currentBlock = {
                     type: `h${level}`,
                     content: line.replace(/^#+\s*/, '').trim()