Last builds:
https://direct.nodejs.org/download/nightly/v20.0.0-nightly202212267c7d2e8dc6/
https://direct.nodejs.org/download/v8-canary/v20.0.0-v8-canary202212266b2b946a63/
Last builds:
https://direct.nodejs.org/download/nightly/v20.0.0-nightly202212267c7d2e8dc6/
https://direct.nodejs.org/download/v8-canary/v20.0.0-v8-canary202212266b2b946a63/
As far as I know, JS does supports non fixed length regular expressions in lookbehind: