v0.8.1

• Fix: When the following conditions were all met, the indices values of result arrays could be incorrect: (1) options hasIndices and global both enabled, (2) the pattern included (^|\G) or similar, and (3) the generated regex was used while its lastIndex was greater than 0.

v0.8.0

• Added option rules.captureGroup (equivalent to Oniguruma compile-time option ONIG_OPTION_CAPTURE_GROUP) to toDetails, toRegExp, and toOnigurumaAst. Allows unnamed captures and numbered backreferences/subroutines when using named capture (with complex resulting rules in edge cases).
• When using option allowUnhandledGAnchors, don't add flag y for unsupported \G (provides better tradeoffs).
• When not using option avoidSubclass, use emulation groups (which prevent captured values from appearing on the result array) for copies of capturing groups created by recursion.
• Fix: Prevent ^ from matching after a string-terminating line feed. (#9)

v0.7.0

• Support recursion with backreferences (when the recursed subpattern doesn't contain captures).
• Fix: Allow unescaped, leading ] in character classes.

v0.6.1

• Fix: With target ES2018, some advanced but supported patterns that contained \[ within a character class were resulting in invalid syntax. (#5)

v0.6.0

• Added support for flags D (Digit is ASCII) and S (Space is ASCII) at top-level.
• Added option rules.asciiWordBoundaries.
• Replaced option accuracy: 'loose' with rules.allowUnhandledGAnchors.
• Replaced option tmGrammar with rules.allowOrphanBackrefs.
• Fix: \w, \d, \s, and their inversions are Unicode-based by default. (#4)
• Fix: Unicode combining marks qualify as \b word boundaries by default.
• Fix: In edge cases, using nested character classes that combined union and intersection led to invalid patterns.
• Fix: In edge cases, some characters were not escaped appropriately in nested character classes.

v0.5.0

• Added support for flag W (Word is ASCII) at top-level.
• Minor type changes.

v0.4.1

• Worked around a parser bug in versions of Bun prior to v1.1.35. (#2)

v0.4.0

• Uses EmulatedRegExp (unless avoidSubclass is enabled) for patterns with atomic groups or possessive quantifiers.
• EmulatedRegExp automatically adjusts subpattern matches and indices to account for injected emulation groups.
• Added target option 'auto' (hat-tip @antfu for idea).
• Improved \G support so it works with additional patterns.
• Changed the shape of toDetails results when subclass details are included.
• Renamed the types used for options objects.
• Added missing Unicode case folding for Latin small long s ſ U+017F.

v0.3.0

• Added support for multiple, non-overlapping recursions.
• Added support for indirect recursion.
• Changed the default maxRecursionDepth from 6 to 5.
• Fixed a bug with some group types when using recursion by number.
• Improved some cases of \G emulation.

v0.2.0

• Changed target value 'ESNext' to 'ES2025'. All proposals used are slated for ES2025.
• Error for unsupported grapheme boundary \y, \Y.
• Error for unsupported octal UTF-encoded bytes above \177.
• Error for incomplete, invalid, or unsupported octal code point \o{…}.