What ︄ means
It changes a character’s shape only in an approved pair.
A variation sequence puts a selector after its base. General-purpose selectors were proposed in 2000, after Mongolian already had script-specific selectors. They let plain text request a shape usually controlled by font or rich-text styling; FE00–FE0F entered Unicode in 2002.
Only listed pairs work; otherwise FE04 is ignored and remains invisible.
Technical-only: FE04 selects a character shape.
FE04 is not the emoji switch; FE0F requests emoji presentation.
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 ︄
︄\FE04Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
