### Bug description

It seems that Quarto doesn't apply the `fragment-index` to images:

```md
## How to Measure

::: {.incremental}
- Assume we have 2 variants of a website: `A` and `B`.
- How would we measure their design effect on user engagement?
:::

![](https://i.imgur.com/PSZggyN.png){.absolute bottom=0 .fragment .fade-in-then-out fragment-index=20}
```

The output will have `data-fragment-index=0` for the image.

In the case above I want the image to appear in sync with an item of the list.
So I'd like to be able to have `![](https://i.imgur.com/PSZggyN.png){.absolute bottom=0 .fragment .fade-in-then-out fragment-index=20}` yet what ever I do, I can't control its index.

Just as a note, it would be great to be able to have control on the index in `.incremental`. Maybe something like defining the index of the first item (Then all are chained)?

This is tested on Windows 10, VS Code, Quarto Extension `1.56` and Quarto CLI `1.2.269`.

### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [X] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
2022-12-01T08:03:18Z
RoyiAvital
enhancement revealjs
Future
open
The `fragment-index` Has No Effect on Images for `Reveal.JS`
https://github.com/quarto-dev/quarto-cli/issues/3539