[Groxx]

Is there a reason the oniguruma syntax can't be translated into other regexes? It'd require a fairly feature-rich engine since oniguruma supports practically everything, but is Chrome missing something fundamental that can't be mimicked? E.g. [::alpha::] could be converted to [a-zA-Z] or the UTF equivalent (though I doubt this particular one is a problem).

[pygy_]

They have lookbehind lookup that's only coming now in ESNext , and, more importantly, recursion, if I understand properly[0].

Maybe more things, I stopped reading the docs at that point to comment here. They have other features absent from JS that can be more or less polyfilled, like possessive quantifiers and sticky matching (they do it with an escape sequence, though, so it can only be polyfilled using this trick[1] if the escape character applies to the whole regexp rather than part of it).

[0] https://github.com/kkos/oniguruma/blob/1983356862bc3ff795d77...

[1] https://github.com/slevithan/xregexp/issues/152

[Groxx]

Yeah, if lookbehinds aren't supported yet, that'd be death. Thanks!