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RegExp.prototype.unicode - JavaScript | MDN

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RegExp.prototype.unicode

Baseline

20169

unicode RegExp u

const regex1 = /\u{61}/;
const regex2 = /\u{61}/u;

console.log(regex1.unicode);
// : false

console.log(regex2.unicode);
// : true

RegExp.prototype.unicode true u false u Unicode "u"

Unicode ( \u{xxxx}, \p{UnicodePropertyValue}) ID /\u{61}/u "a" /\u{61}/ u "u".repeat(61) \u u 1
2 /[]/u "" "\ud83d"
lastIndex exec() Unicode UTF-16 Unicode

unicode undefined

Unicode

Unicode u v Unicode Unicode u v SyntaxError

u v Unicode UTF-16

unicode

js

const regex = /\u{61}/u;

console.log(regex.unicode); // true


ECMAScript 2027 LanguageSpecification # sec-get-regexp.prototype.unicode

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MDN 20251110

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