Emoji Encoding

on YouTube ↗28m

" summary

Explains why '👩🏿‍🎤'.length = 7 by breaking it into two UTF‑16 surrogate pairs for each astral emoji plus skin‑tone modifiers and zero width joiner glue and a final microphone code point, shows JavaScript using UCS‑2/UTF‑16 so .length and split miscount, demonstrates fixes with String.prototype.normalize and surrogate‑pair math, cites tools like Matthias Baynard’s pile of poo test, gives numbers (over 90% of users use emoji, 5 billion/day on Messenger, Unicode 13 in Mar 2020), and notes the hijab emoji proposal succeeded.

AI-written summary · about

" chapters (9)

1. 0:00Emoji encoding intro
2. 1:06UTF-8 in web dev
3. 6:27Unicode history and purpose
4. 10:41UTF encoding formats
5. 12:52JavaScript combining marks
6. 17:52Emojis and Unicode Astral Planes
7. 21:43Compound emoji sequences
8. 24:14Cultural emoji differences
9. 26:22Proposing new emojis

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