The two versions of this function are equivalent, but the "underscore" naming is preferred.
This function lists font families currently available that can be used by R2SWF and showtext packages.
font_families()
font.families()A character vector of available font family names.
By default there are three font families loaded automatically,
i.e., "sans", "serif" and "mono". If one wants to use other fonts,
font_add() needs to be called
to register new fonts by specifying a family name and corresponding
font files. See font_add() for details about
the meaning of "family name" in this context, as well as
a complete example of registering and using a new font.
font_add()
font_families()
#> [1] "sans" "serif" "mono"