CSS: generic() font-family

[estelle]

The <generic-script-specific> data type, including generic(fangsong), generic(kai), generic(khmer-mul), and generic(nastaliq) is defined in CSS fonts level 4. There is no function definition; it is only included as a data type.

https://drafts.csswg.org/css-fonts/#typedef-generic-script-specific

Request to add to MDN content: mdn/content#42699

[xfq]

See also #7445