chunk options conditional to output format ?

Discussed in https://github.com/quarto-dev/quarto-cli/discussions/2411

^{Originally posted by shabbychef September 12, 2022}
Hi,
I think in quarto I can set default options in the header YAML via something like:

format:
  html:
    out-width: "625px"
    out-height: "402px"
    fig-format: png
    fig-width: 10.0
    fig-height: 6.43
  pdf:
    fig-width: 11.5
    fig-height: 6.8

Is it possible to override these in a chunk in a way that is by output type? It seems that I can only override these options absolutely, and not conditionally on the output type.

thanks,

This was also tried

```{r 'plot_foo'}
#| html: out-width: "625px"
#| html: out-height: "402px"
#| pdf: out-width: "\\textwidth"
#| pdf: out-height: "0.64\textwidth"
```