Difference between codePointAt and charCodeAt

javascript string codepoint
Stanislav Mayorov picture Stanislav Mayorov · Apr 10, 2016 · Viewed 9.3k times · Source

What is the difference between String.prototype.codePointAt() and String.prototype.charCodeAt() in JavaScript?

'A'.codePointAt(); // 65
'A'.charCodeAt();  // 65

Answer

ToxicTeacakes picture ToxicTeacakes · Apr 10, 2016

From Mozilla:

The charCodeAt() method returns an integer between 0 and 65535 representing the UTF-16 code unit at the given index (the UTF-16 code unit matches the Unicode code point for code points representable in a single UTF-16 code unit, but might also be the first code unit of a surrogate pair for code points not representable in a single UTF-16 code unit, e.g. Unicode code points > 0x10000). If you want the entire code point value, use codePointAt().

charCodeAt() is UTF-16, codePointAt() is Unicode.

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