Bug Flowchart: Node with text renders by default as Markdown

[PLukas2018]

Description

According to documentation, it is possible to create a node with text using Markdown formatting in flowchart diagrams. To do this, the text should be enclosed in quotes and backticks "` text `".

However, it appears that text is being interpreted as Markdown even when it is not enclosed in quotes and backticks. This causes problems when trying to create nodes with text corresponding to unsupported markdown syntax, making it difficult or impossible to display certain texts as plain text in nodes. Examples:

• 1.
• - x
• 1. phase
• ...

Steps to reproduce

Creating the following diagram in Mermaid results in nodes with error messages instead of displaying the text:

flowchart LR
    a["1."]
    b["- x"]

Screenshots

Code Sample

https://develop.git.mermaid.live/edit#pako:eNoti7sOwjAQBH8l2jog0bqmpIKSozjscxzJD2RsAYry7xwKW-2sZhfY4gQGPpaXDVzbcDpTHjR8JRz2hNuGd8Xd8P4zRiSpiWen3-W3EFqQJASj1YnnHhuB8qoq91Yun2xhWu0yopY-BRjP8anUH46bHGeeKqdNWb_qoTDq

Setup

• Mermaid version: 11.1.0
• Browser and Version: Chrome, Firefox

Suggested Solutions

• The text should be displayed as plain text in the node when it is not enclosed in quotes and backticks. The Markdown formatting should only be applied when the text is correctly enclosed.
• Add support for an escape sequence (e.g., 1\.) to prevent Markdown interpretation.
• Add an option to turn off Markdown formatting.

Additional Context

No response

[shaloo]

Running into the same bug even using Sphinx and mermaid extension. Tried online editor, same issue. All my charts were working fine and now each node says "Unsupported markdown: list".

Tedious Workaround

Remove all 'space' chars from the node name and it works. See first few nodes in the screenshot below. Hope this bug gets fixed soon as I have 3 dozen charts - cant workaround for all.

[candlerb]

Similarly, if you include a URL in the node text, then it is rendered as "Unsupported markdown: link"

Example: open-telemetry/opentelemetry.io#5168

[jaime-jacob]

Hello! Myself and a partner would love to work on this for the next few weeks. We are both seniors at the University of Michigan studying computer science. We are new to open-source contributions and are looking for any way to help on this project as we really value the work you are doing. Please let us know if we can pick up this task!

[mleonhard]

A simple workaround is to replace the first space char with   U+202F  NARROW NO-BREAK SPACE (NNBSP).

graph
    First[1.<NNBSP>One Two]

See on mermaid.live

Editors will change it into a normal space character on save. I tell IntelliJ not to do this with %% @formatter:off and %% @formatter:on.