I've created a Shiny app to demonstrate package functionality and hosted it on shinyapps.io. I used knitr::include_app() to embed it in the package vignette, and built a pkgdown site.
Now, if you view the vignette on the pkgdown site, the app displays as intended (second panel if you scroll down): https://qdread.github.io/testShinyVignette/articles/testshiny.html
If you run the following code locally, you can view the vignette in your browser and the app displays as intended:
devtools::install_github('qdread/testShinyVignette')
browseVignettes(package='testShinyVignette')
However, if you run this code, the vignette opens in the RStudio viewer pane and the app does not load as desired:
vignette('testshiny', package = 'testShinyVignette')
Is this the intended behavior or am I doing something wrong? Source code for the vignette is at https://github.com/qdread/testShinyVignette/blob/main/vignettes/testshiny.Rmd