Thanks to SweetAlert for Bootstrap forked from Tristan Edwards non-Bootstrap SweetAlert. Purpose is to demonstrate how to use @RStudio htmltools to get interactive javascript in your R workflow/environment.
Modified http://timelyportfolio.github.io/sweetalert/lib/sweet-alert.min.js to a secure url
https://timelyportfolio.github.io/sweetalert/lib/sweet-alert.min.js