This will include the clipboard.js in the head tag.
rclipboardSetup()
A shiny::tagList
shiny::tagList
Inclusion of clipboard.js will do so only once, since the code is wrapped inside a singleton call.
singleton
rclipboardSetup() must be called in the ui function of the Shiny app before a rclipButton is created (typically in the server function)
rclipButton
https://clipboardjs.com/