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2

Glad to see an answer that brings up this concern. However, I don’t believe there are any browsers where String.fromCodePoint(65536).length === 1 will be true. That ES strings expose their UTF16ishness isn’t implementation-specific behavior — it’s a well-defined part of the spec, and it can’t be fixed due to backwards compat.

Semicolon
– Semicolon

2018-12-26 10:48:49 +00:00
Commented Dec 26, 2018 at 10:48
3

Re: the new final notes, WHATWG and co have landed on UTF-8 as the sole ‘correct’ encoding for all text interchange on the platform. This isn’t gonna change (and it’s a good thing). The ES issue is distinct from that, though — it’s about ES having a string abstraction where the code units of the internal ‘utf-16 + lone surrogates’ encoding (it’s neither UTF-16 nor UCS2 quite) ‘break through’ when using indexed address, String.prototype.length, etc. (1/2)

Semicolon
– Semicolon

2019-04-25 20:54:33 +00:00
Commented Apr 25, 2019 at 20:54
1

The body responsible for ES is TC39 rather than W3C (or WHATWG, etc), and they cannot change the existing functionality because it would break the web. Instead, they can introduce new functionality that behaves correctly. They already have begun doing this — the 'u' flag on RegExp, String.prototype.codePointAt, and String.prototype[@@iterator] provide safer alternatives to the old APIs. (2/2)

Semicolon
– Semicolon

2019-04-25 20:55:12 +00:00
Commented Apr 25, 2019 at 20:55
Wow—almost 5 years old and lots of edits. It looks really useful, but this code has clearly never been run. S or string?

dsl101
– dsl101

2022-02-11 14:29:10 +00:00
Commented Feb 11, 2022 at 14:29
While you're possibly correct that no other answers (at the time of your posting) dealt with these characters correctly, the question also didn't ask for this.

user400654
– user400654

2023-02-07 19:11:59 +00:00
Commented Feb 7, 2023 at 19:11

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