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Published 20 hours ago • verified publisher icon bd82

Lookahead assertions are only semantically valid after an atom

Open bd82 opened this issue 6 years ago • 0 comments 

> /(?=y)/.test("(?=y)")
true
> /x(?=y)/.test("x(?=y)")
false

Otherwise they are treated literally

bd82 avatar Apr 10 '18 18:04 bd82