What 󠆵 means
It requests a registered written form after a matching character.
The base is the character being varied. Unicode calls it an ideograph: a Han character used in Chinese, Japanese, and other East Asian writing. VS198 follows it in an Ideographic Variation Sequence (IVS).
IVS solve a publishing problem: plain text can preserve a chosen print form. The first Ideographic Variation Database collection, Adobe-Japan1, was registered on 2007-12-14.
Why is variation selector 198 invisible?
Unsupported pairs leave the selector invisible.
If this exact pair is unsupported, the mark is ignored and the base keeps its usual form. Japanese typography also requires the text and font to use the same IVD collection to show the intended form.
Don't confuse it with
4Questions people ask
1Why does 󠆵 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 󠆵
󠆵\E01B5Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
