font_variants() returns a tree of fonts organised as per
fontconfig's nomenclature. The first level contains variants of a
font and the second level contains font styles.
Usage
font_variants(fontset)
font_styles(fontset, variant)
Arguments
fontset
A string giving the name of a set of fonts
(e.g. "Liberation" or"Bitstream Vera"). Use
fontset_list() to obtain the list of fontsets
registered in your session.
variant
Font variant, as per Fontconfig's nomenclature. Use
fontset_variants() to find out which variants are
available for a fontset.
Details
See also font_families() and font_faces()
for similar collections organised according to R nomenclature of
fonts. Note that variants and styles are a super set of R families
and faces and may contain more fonts.