Dear members of R-package-devel,
CRAN has the following policy: Packages which use Internet resources
should fail gracefully with an informative message if the resource is
not available or has changed (and not give a check warning nor error).
I have a CRAN-accepted package with vignettes that use
>
>
> The parameter responsible for this base64 encoding is called
> self_contained, which defaults to TRUE in the rmarkdown::html_document
> format, which prettydoc::html_pretty inherits from. Set it to FALSE in
> the YAML header of the vignette.
>
> Note that some other scripts and CSS files may
