Unicode Character Classes in ECMAScript Regular Expressions - Updated June 04, 2023005D The interpretation of ECMAScript regular expression character classes is according to code units, not characters. Despite the fact that "[𝌆-𝍖]" contains 5 characters, since "[𝌆-𝍖]".length === 7, the meaning when used as a character class is surprising. "[𝌆-𝍖]" is equivalent to [\uD834\uDF06-\uD834\uDF56] and means "match either D834, or something in DF06‒D834, or DF56," just as if we ha
