UnoCSS version

65.4.0

Describe the bug

Astro build becomes extremely slow when

• a MDX file contains:
  • heading
  • TypeScript, HTML or JavaScript codeblock with bracketed content <content>
  • footnote
• transformerAttributifyJsx is loaded

The issue starts from v0.60.1, previous versions does't have the issue.

Reproduction

1. Add MDX and UnoCSS integrations in astro.config.ts
2. Load transformerAttributifyJsx in unocss.config.ts
3. Add a MDX file to src/pages with, for example (remove "\"):

# Heading

\```html
<anything>
\```

[^footnote]

[^footnote]: Content

4. Run astro build and it won't finish

Minimal reproduction in StackBlitz, https://stackblitz.com/edit/withastro-astro-pgoyxnq9?file=src%2Fpages%2Findex.mdx
Run pnpm install and pnpm astro build to build.

System Info

No response

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.