Using htmlDependency()

Main parameters:

• A name.
• A version (useful to remember on which version it is built upon).
• A path to the dependency (can be a CDN or a local folder).
• script and stylesheet to respectively pass css and scripts.

# handle dependency
mdb_cdn <- "https://cdnjs.cloudflare.com/ajax/libs/"
mdb_card_dep <- function() {
  htmlDependency(
    name = "mdb-card",
    version = "1.0",
    src = c(href = mdb_cdn),
    stylesheet = "mdb-ui-kit/3.6.0/mdb.min.css"
  )
}

It is crucial to wrap the created dependency in a function since the path has to be determined at run time and not when the package builds.