Hi list 👋

I'm trying to do some advanced parsing of source code using RegEx. I'm
using non-capturing parentheses "(?…)" and friends for look aheads and look
behinds and such. I'm wondering if anyone can tell me:

1. What type of RegEx extension are these types of patterns (look aheads,
look behinds)?
2. Is there an equivalent that could be used in JavaScript, say, in a node
application?

Thanks in advance and keep safe in these difficult times.

Ted Stresen-Reuter

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