Return the code unit of char at pos in s.
[see JS: Character, Code Unit, Codepoint]
If this character has Unicode codepoint less than 2^16, then, result is identical to
// char “a” has codepoint 97 console.log ( "abc".charCodeAt (0) === 97 ); // true
Note, you probably want
[see JS: String.prototype.codePointAt]
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