xaringan knit landing page

[issactoast]

Hi yihui,

Thank you for making all these tools. I am heavily using this xaringan in day-to-day life. :)

I just wonder how to make xaringan kniting result page to show my current working slide like if I am using inf_mr().

The reason why I asking this is that if use inf_mr() I need to turn it on and off when there is an error in my code in the slide. (that's very annoying, it becomes slow and ultimately I need to restart the RStudio every time)

All I want is to see the current slide when I knit xaringan page. Is there any option for this?

[yihui]

if use inf_mr() I need to turn it on and off when there is an error in my code in the slide. (that's very annoying, it becomes slow and ultimately I need to restart the RStudio every time)

When there is an error in your code, inf_mr() should wait for you to fix the error and save the Rmd file. It shouldn't do anything else. If that is not the case, it's a bug (assuming you are using the latest versions of R packages). I don't have an idea about how it can become slow due to errors.

All I want is to see the current slide when I knit xaringan page. Is there any option for this?

Currently there isn't an option, but I guess it's possible to implement. I need to take a closer look.

[yihui]

Okay, now I'm sure this is possible and relatively easy to implement. I just need someone to help me since I probably won't have time for it, but I do think this will be a useful feature.

To whomever interested in sending a PR:

First use slide_context() to get the slide number:

xaringan/R/utils.R

Line 143 in 325c4ad

slide_context = function(ctx = rstudioapi::getSourceEditorContext()) {

Then insert slideshow.gotoSlide(n); in the JS here:

xaringan/R/render.R

Line 164 in 325c4ad

play_js, countdown_js, hl_pre_js), collapse = '\n')))

I hope this feature can be controlled by a global option, e.g., options(xaringan.rstudio.view_current = TRUE). Not sure if TRUE or FALSE would be a better default, though.