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npm · #230 most downloaded on npm
Regular expression parser for ECMAScript.
Last release 11 months ago
22 Oct 2025
Ships unpredictably
gaps range from 2 weeks to 12 months
Nearly every release is documented
notes for 26 of 27 stable releases
Nothing withdrawn
no release was ever pulled
4 years old
27 releases · first in 2022
One column per quarter.
updates unicode resource with latest
4.12.1 (2024-10-28) Bug Fixes d should be invalid in ES2021
4.12.0 (2024-10-27) Features support for modifier
generate provenance statements on release
updates unicode resource with latest
add support for ES2025 duplicate named capturing groups ( #195 ) ( fb20f68 ), closes #194
updates unicode resource with latest
4.10.0 (2023-10-25) Features export RegExpSyntaxError
wrong character class parent type
update unicode ids with unicode v15.1
error in expression with nested expression
error in expression character class with nested character class
improve types to fix parent type of string Unicode properties
Fixed variants of ClassRangesCharacterClassElement
wrong syntax error message when using RegExpValidator#validatePattern and RegExpValidator#validateFlags.
SyntaxError message for v flag with RegExpValidator#validatePattern
# 4.6.0 (2023-07-22) ### Features * add support v flag
add types condition to the front of the exports
support Unicode properties added in ES2023
allow named backreferences without u flag in strict
# 4.4.0 (2023-01-18) ### Features * support Node 17
add onRegExpFlags to RegExpValidator.Options and deprecate onFlags
support Unicode properties added in ES2022
support Unicode ids added in v14+15
Requires Node@^12.0.0 || ^14.0.0 || ^16.0.0 || >=18.0.0
## 3.2.1 (2022-11-28) ### Bug Fixes * update package name
Nothing published for this version
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