add_tooltip: Add a tooltip on a map
In dreamRs/r2d3maps: Create Maps with D3

Description Usage Arguments Value Examples

Add a tooltip on a map

1 2	add_tooltip(map, value = "<b>{name}</b><<scale_var>>", as_glue = TRUE, .na = "no data")

`map`	A `r2d3map` `htmlwidget` object.
`value`	A `formula` or a `glue` string matching columns in `data`.
`as_glue`	Use a `glue` string, if `FALSE` you can pass a character vector as tooltip.
`.na`	Value to replace NA values with (if `value` is a `glue` string). Use `NULL` to don't display tooltip if there is NAs.

A r2d3map htmlwidget object.

library( r2d3maps )
library( rnaturalearth )

belgium <- ne_states(country = "belgium", returnclass = "sf")

# default
d3_map(shape = belgium) %>%
  add_tooltip()

# glue
d3_map(shape = belgium) %>%
  add_tooltip(value = "{name} ({gn_name})")

# formula
d3_map(shape = belgium) %>%
  add_tooltip(value = ~paste0(name, " (", gn_name, ")"))