Reference for stage 4 regexp-v-flag

[Josh-Cena]

Description

#26847

The most widespread change is to change "non-unicode mode" to "Unicode-unaware mode" to mean "either u or v flags". Other than that, the changes are mainly around ignoreCase, character classes, and Unicode character class escapes.

Also fixes #26617

Motivation

Additional details

https://github.com/tc39/proposal-regexp-v-flag

Related issues and pull requests

[github-actions]

Preview URLs (27 pages)

• /en-US/docs/Web/JavaScript/Guide/Regular_expressions
• /en-US/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features
• /en-US/docs/Web/JavaScript/Reference/Errors/Bad_regexp_flag
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/@@match
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/@@replace
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/@@split
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/RegExp
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/flags
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/ignoreCase
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicodeSets
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
• /en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Backreference
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Lookahead_assertion
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Named_backreference
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Named_capturing_group
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Quantifier
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Unicode_character_class_escape
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Wildcard
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Word_boundary_assertion
• /en-US/docs/Web/JavaScript/Reference/Regular_expressions

Flaws (1)

Note! 26 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicodeSets
Title: RegExp.prototype.unicodeSets
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: javascript.builtins.RegExp.unicodeSets

External URLs (11)

URL: /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/ignoreCase
Title: RegExp.prototype.ignoreCase

• https://unicode-org.github.io/icu/userguide/transforms/casemappings.html (1 time) (Note! This may be a new URL 👀)
• https://unicode.org/Public/UCD/latest/ucd/CaseFolding.txt (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicodeSets
Title: RegExp.prototype.unicodeSets

• https://v8.dev/features/regexp-v-flag (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape
Title: Character class escape: \d, \D, \w, \W, \s, \S

• https://unicode.org/Public/UCD/latest/ucd/CaseFolding.txt (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class
Title: Character class: [...], [^...]

• https://v8.dev/features/regexp-v-flag (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Unicode_character_class_escape
Title: Unicode character class escape: \p{...}, \P{...}

• https://tc39.es/ecma262/multipage/text-processing.html (4 times) (Note! This may be a new URL 👀)
• https://unicode-org.github.io/icu/userguide/strings/unicodeset.html (1 time) (Note! This may be a new URL 👀)
• https://util.unicode.org/UnicodeJsps/character.jsp?a=0061 (1 time) (Note! This may be a new URL 👀)
• https://util.unicode.org/UnicodeJsps/list-unicodeset.jsp (1 time) (Note! This may be a new URL 👀)
• https://v8.dev/features/regexp-v-flag (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/JavaScript/Reference/Regular_expressions/Word_boundary_assertion
Title: Word boundary assertion: \b, \B

• https://unicode.org/Public/UCD/latest/ucd/CaseFolding.txt (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2023-06-22 14:29:47)

[Josh-Cena]

I guess @chrisdavidmills will want to review this anyway? You may want to ask V8 folks since V8 is currently the only engine shipping this.

[mathiasbynens]

LGTM with some suggestions

[Josh-Cena]

This proposal is now integrated in the main spec, and we are getting quite a few queries recently about the v flag's documentation. Can I get an editorial review from @mdn/yari-content-javascript?

[hamishwillee]

@chrisdavidmills Are you going to be able to find time to do this? @Josh-Cena I don't consider myself expert enough to give you a great review, but will to do so on Friday if needed.

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.

[zcorpan]

@mathiasbynens is the subject matter expert here. 🙂

[mathiasbynens]

@mathiasbynens is the subject matter expert here. 🙂

Hah, thanks! I already reviewed + approved the PR, and the suggestions I gave have been addressed, so please don't block on me. This looks really good, and we can always incrementally land improvements if any come up.

[Elchi3]

This looks really good to me, too. Amazing work, @Josh-Cena! 🎉
I'm going to merge this now.

[Josh-Cena]

Thanks @Elchi3!