Unicode: Ligature

Unicode Ligatures

Unicode has characters that is named ligature.

• fi (U+FB01: LATIN SMALL LIGATURE FI)

examples of Unicode Latin ligatures:

ff fi fl ffi ffl ſt st ij

IJ Œ

œ ꟹ

🙰 🙱 🙲 🙳

Unicode Ligature Characters are Not Necessarily Rendered as Ligature

Ironically, the deprecated [fi] “LATIN SMALL LIGATURE FI” is less of a ligature in some fonts than ASCII f+i. It isn't required to be stylistically merged fi (connected or dotless etc), just be f+i in a single glyph, for legacy support.

from unicode expert [2020-08-05 https://x.com/FakeUnicode]

Difference of Ligature vs Digraph