Clicking a leaflet marker takes you to URL

Within the leaflet package for R, is there a way to click on a marker, and be directed to a URL?*

This seems to be possible in JS.

It's easy to add a standalone Popup with a URL:

library(leaflet)
content <- paste(sep = "<br/>",
                 "<b><a href='http://www.samurainoodle.com'>Samurai Noodle</a></b>"
)

leaflet() %>% addTiles() %>%
  addPopups(-122.327298, 47.597131,  content,
             options = popupOptions(closeButton = FALSE)
  )

It's also straightforward to add a Marker that, when clicked, provides a URL in the popup:

leaflet() %>% addTiles() %>%
  addMarkers(-122.327298, 47.597131, popup =  content,
            options = popupOptions(closeButton = FALSE)
  )

Perhaps something custom passed to leaflet in ...?

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Lastly, how could a custom JS function display different URLs for each map marker? Consider the example data.frame:

df <- data.frame(url = c("https://stackoverflow.com/questions/tagged/python",
                         "https://stackoverflow.com/questions/tagged/r")),
                 lng = c(-122.327298, -122.337298),
                 lat = c(47.597131,47.587131))

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*This was previously asked, but I'm asking the question again here and making a minimal, reproducible example.

from Clicking a leaflet marker takes you to URL