[ttffont.js] preferredFamily is undefined in NameTable

[yeori]

NameTable.preferredFamily is undefined

jsPDF/src/libs/ttffont.js

Line 1269 in 5d09af9

this.preferredFamily = strings[15];

• location: src/libs/ttffont.js

The ttf specification says preferredFamily is at nameID 16
(nameID 15 is said to be reserved, which is undefined)

https://learn.microsoft.com/ko-kr/typography/opentype/spec/name#name-ids
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6name.html

Sample

Font Inter from google fonts at https://fonts.google.com/selection?query=Inter

Inter-Thin.ttf.zip

It has preferredFamily as 'Inter' and preferredSubfamily as 'Thin'

Thanks.

[krrish-sehgal]

I would like to work on this , Please assign me this issue under hacktoberfest 2024.
Thanks.