Subcaption issues with and without labels with KableExtra

[matthewgson]

Bug description

I'm not sure if this issue belongs to quarto or kableExtra, but leaving the report here. Please let me know if this should be reported to kableExtra.

Please see below for reprex.

Edit: The issue is related to pdf output.

---
title: "test_quarto"
format: pdf
---

Knitr

Without label

#| tbl-cap: "Example1"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"
#| layout-ncol: 1

knitr::kable(head(iris))
knitr::kable(tail(iris))

Works fine

With label

#| label: tbl-example1
#| tbl-cap: "Example2"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"
#| layout-ncol: 1

knitr::kable(head(iris))
knitr::kable(tail(iris))

Works fine

KableExtra

Without label

It generates two additional empty labels: (a),(b),(c),(d)

#| tbl-cap: "Example3"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"
#| layout-ncol: 1

kableExtra::kable(head(iris))
kableExtra::kable(tail(iris))

With label

#| label: tbl-example4
#| tbl-cap: "Example4"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"
#| layout-ncol: 1

kableExtra::kable(head(iris))
kableExtra::kable(tail(iris))

Works now.

Running on RStudio build 353 / R4.2.2

Checklist

• 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.
• Please format your issue so it is easier for us to read the bug report.
• Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
• Please document the operating system you're running. If on Linux, please provide the specific distribution.

[cscheid]

I can't reproduce this on the 1.3 prereleases. Can you please install the latest version of quarto and try again?

[matthewgson]

Apologies that I didn't mention its related to pdf output. I'm using rmarkdown version 2.2 and knitr 1.42, kableExtra 1.3.4.

[cscheid]

Apologies that I didn't mention its related to pdf output. I'm using rmarkdown version 2.2 and knitr 1.42, kableExtra
1.3.4.

Ok, but can you also install quarto's latest version? https://quarto.org/docs/prerelease/1.3.html

Edit: With that said, I can repro the issue locally.

[matthewgson]

Yup, I tried with quarto 1.3, and the issue persists. It creates problem with original knitr::kable as well on my local.

[cscheid]

The following syntax now works with kableExtra:

---
title: issue-4517
format: pdf
---

::: {#tbl-example4}

```{r}
#| echo: false
#| label: tbl-example4-1
#| tbl-cap: Cars
kableExtra::kable(head(iris))
```

```{r}
#| echo: false
#| label: tbl-example4-2
#| tbl-cap: Pressure
kableExtra::kable(tail(iris))
```

Example4

:::

I'm going to leave this open for now, but I think it's now an enhancement rather than a bug.

[cscheid]

The following syntax also works on main now:

```{r}
#| label: tbl-example4
#| tbl-cap: "Example4"
#| tbl-subcap: 
#|   - "Cars"
#|   - "Pressure"

kableExtra::kable(head(iris))
kableExtra::kable(tail(iris))
```