a slash can break the extglob syntax

[hgl]

console.log(new Minimatch("@(a|b)").makeRe());
console.log(new Minimatch("@(a/|b)").makeRe());

outputs

/^(?:a|b)$/
/^@\(a\/\|b\)$/

[isaacs]

Yes. That is part of the specification, such as it is. Extglob can only be path portions, not containing slashes, and will never match a section containing a /.

However, it does appear that this is behaving differently than in Bash. It should just discard that part of the extglob, not destroy the entire pattern. Seems this might've changed in a recent bash 5.2 version.

$ mkdir -p a/b/c

$ echo @(x|a|a/b)/*
a/b a/x

$ # note, a/b doesn't match anything
$ # but it *also* doesn't break the whole pattern

$ echo @(a|a/b)/*
a/b a/x

$ node
Welcome to Node.js v24.4.1.
Type ".help" for more information.
> require('./').globSync('@(a|a/b)/*')
[]
> // nothing returned, oops ^

[leuasseurfarrelds247-arch]

064fe7f3312418007dea2b49a19844a9ee378f49

[leuasseurfarrelds247-arch]

064fe7f3312418007dea2b49a19844a9ee378f49