Preview Link for RStudio Download Page Hangs

[jmgirard]

When I try to preview a link to the RStudio download page in a RevealJS presentation, it just hangs forever.

---
format: 
  revealjs:
    preview-links: true
---

Works: [Download R](https://cloud.r-project.org)

Doesn't: [Download RStudio](https://www.rstudio.com/products/rstudio/download/)

[cscheid]

This will generally happen to any domain which disallows embedding in iframes; RStudio is one of them. IIRC, some google pages also disallow iframe embedding.

[jmgirard]

If it's possible to detect this, it might be helpful to show a message in the preview window explaining that.

[jmgirard]

And maybe in those cases, also include a clickable link that will open in a new window.

[jjallaire]

Detecting is a bit tricky b/c we can't sniff what happens inside the iframe. However, if you see this for a given link you can opt-out for just that link as described here https://quarto.org/docs/presentations/revealjs/presenting.html#preview-links