Invisible links in mermaid

[aghaynes]

According to the help files for mermaid, it is possible to have invisible links between nodes in mermaid charts, which can be particularly useful for enforcing a particular layout. https://mermaid-js.github.io/mermaid/#/flowchart?id=an-invisisble-link E.g. the following code should produce the flowchart further down.

```{mermaid}
flowchart LR
  box1 --> box2
  box2 --- box3
  box4 ~~~ box2
```

Executing the chunk in quarto produces a syntax error though.

It seems like the invisible links are probably a new feature (there's an issue referencing a commit in mid-October - mermaid-js/mermaid#3192).

I guess this would require an update to the version of mermaid in quarto?

[cscheid]

Yes, it would require an update. We'll do it in v1.3, likely later today.