https://deanattali.com/blog/shinycssloaders-v1.0/
{shinycssloaders} v1.0: You can now use your own image, plus 3 years' worth of new features!
The {shinycssloaders} package is a handy little tool that lets you easily add loading animations to a Shiny output (a plot, a table, etc.) while it’s...
shinycssloadersuseimage
https://daattali.com/shiny/shinycssloaders-demo/
{shinycssloaders} package 1.1.0.9000
shinycssloaderspackage