code-line-numbers and fragments not working as expected/hoped in revealjs

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#11,585 3 comments 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript
Domain
frontend

Research direction

Start by rendering the provided QMD example with Quarto 1.5.56 and inspect the generated revealjs output, especially the code-line-numbers and fragment elements. Done means the highlighted code lines advance in sync with fragment-index values 1 and 2.

Written by the indexing model from the issue text.

Description

enhancement revealjs
Bug description

I would like to use `#| code-line-numbers and custom fragments to annotate revealjs slides, but I haven't been able to get it to work. Is this possible?

Here is the kind of thing I have in mind.

---
title: "code-line-numbers"
sbustitle: "and fragments"
format: revealjs
execute: 
  echo: true
---

## A slide

```{r}
#| code-line-numbers: "|1|2"
x <- 1
y <- 2
```

:::{.fragment fragment-index=1}
Comment on first line of code
:::

:::{.fragment fragment-index=2}
Comment on second line of code
:::

But when I view, the code highlighting is not synced up with the fragment indexing.

Steps to reproduce

No response

Expected behavior

No response

Actual behavior

No response

Your environment

R version 4.4.1 (2024-06-14)
Platform: aarch64-apple-darwin23.4.0
Running under: macOS Sonoma 14.4
RStudio: 2024.09.1+394 (2024.09.1+394)

Quarto check output

Quarto 1.5.56
[✓] Checking versions of quarto binary dependencies...
Pandoc version 3.2.0: OK
Dart Sass version 1.70.0: OK
Deno version 1.41.0: OK
Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
Version: 1.5.56
Path: /Applications/quarto/bin

[✓] Checking tools....................OK
TinyTeX: (not installed)
Chromium: (not installed)

[✓] Checking LaTeX....................OK
Using: Installation From Path
Path: /opt/homebrew/bin
Version: undefined

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
Version: 3.12.4
Path: /Users/rpruim/.virtualenvs/r-reticulate/bin/python3
Jupyter: 5.7.2
Kernels: python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
Version: 4.4.1
Path: /opt/homebrew/Cellar/r/4.4.1/lib/R
LibPaths:
- /opt/homebrew/lib/R/4.4/site-library
- /opt/homebrew/Cellar/r/4.4.1/lib/R/library
knitr: 1.49
rmarkdown: 2.29

[✓] Checking Knitr engine render......OK

Dominant language
JavaScript
Stars
6k
Forks
458
Avg merge
1d 9h
Merged PRs (30d)
41

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