In general, the user will not want or need to inspect the output of this
funciton. Instead it is always used within an 'aes()' call for
geom_point_svg(), or one of the scale functions in ggsvg of
the form scale_svg_*().
css(selector, ..., format = NULL)CSS selector as a single character string e.g. "circle .big"
single named argument of the form css_property = value.
The value will remain unevaluated for passing into ggplot2::aes()
a string specifying the formatting for the CSS property value. Default: NULL is equivalent to "[x]" and will insert just the bare value. For example, if the CSS property required an explicit "px" suffix on the value, the format would be "[x]px"
length-1 named list where the name is the full name of this CSS aesthetic, and the value is the unevaluated value passed in to the ...