Recent commit to develop causes demo charts to render without styles

[NicolasNewman]

Description

I recently noticed on the latest version of develop that the styles for charts on the demo page aren't loading properly. I've traced the issue back to the commit 0c449bb: handle optional .styles which is where the behavior first appears.

Steps to reproduce

Reproduce

1. Clone the latest version of develop
2. pnpm i && pnpm dev
3. Navigate to the demo page
4. Load the sequence or flowchart demo
5. Charts aren't rendering properly

Rollback

1. Revert to the commit before 0c449bb
2. Restart the dev server
3. Refresh the page
4. The issue is resolved

Screenshots

Code Sample

No response

Setup

• Mermaid version: develop
• Browser and Version: [Chrome, Firefox]

Additional Context

No response

[NicolasNewman]

Commit in question

[Yokozuna59]

1. Revert to the commit before 0c449bb

We can't just revert the commit; some diagrams would fail because they don't have that field since it's optional, i.e., info. I'm going to look into it shortly, when I've time.

[NicolasNewman]

I apologize if my wording was confusing. I was just describing how to identify the commit where the issue started to appear and didn't mean to imply that as the solution.

I have the lines in question commented out on my local environment so there's no immediate need on my end for having it resolved.

[Yokozuna59]

It should be resolved with this PR #4528.