VS15/VS16 are presentation requests, not arbitrary font switches
Selectors are limited to emoji-capable scalar bases. Ordinary letters, regional indicators and standalone modifier components are rejected instead of receiving meaningless selectors.
Generate VS15 or VS16 requests locally and compare the resulting code points and rendered output.
Emoji are Unicode characters and sequences. Rendering can differ by operating system, font, app, and Unicode/Emoji version. Sequence handling here follows Unicode Emoji structure; the searchable catalog is curated rather than an exhaustive emoji encyclopedia.
Selectors are limited to emoji-capable scalar bases. Ordinary letters, regional indicators and standalone modifier components are rejected instead of receiving meaningless selectors.