Difference between codePointAt and charCodeAt

Question

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

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

Answer 1

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.

Answer 2

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt

from this url, you can get the differences, their function is almost the same, but some differences on the returns and illegal argument

Answer 3

To add a few for the ToxicTeacakes's answer, here is another example to help you know the difference:

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