🔰code point
JS ⟩ value ⟩ primitive ⟩ String ⟩ Unicode ⟩ code point
numbers from U+0000 to U+10FFFF (17*2^16=1,114,112 total).
usually represented using 4~6 hexadecimal digits.
divided into 17 code planes. (
2^16code points each)every Unicode character is assigned a code point.
UTF-16 transforms code points into
2 code units (surrogate pair).
🈯 synonyms： "Unicode character"
regex flag /u works on code points, not on grapheme clusters❗
character encoding transforms code points into code units.
astral code points : U+10000 ~ U+10FFFF.
1,114,112 code points are available, but only 137,929 (as of May 2019) have assigned characters.
escape sequence uses code points.
replit ⟩ code point
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