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Editorial Team
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Asked: 2026-05-29T05:43:53+00:00

I hope this question isn’t too broad, but then again I would expect the

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I hope this question isn’t too broad, but then again I would expect the Javascript (and other languages) regular expression engine’s to share most of it’s functionality with what is considered standard / expected regular expression behavior.

I made a statement about C# having unique regular expression capabilities in this post :: RegEx match open tags except XHTML self-contained tags

Specifically, here is the statement:

C# is unique when it comes to regular expressions in that it supports
Balancing Group
Definitions.

I’m curious what unique regular expression capabilities javascript has if any.

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1 Answer

  1. Editorial Team

    Although JavaScript’s regular expression library supports features that are considered as common (see comparison table), there is one particular expression that I haven’t seen in other:

    /[^]/

    This matches any arbitrary character similar to /[\s\S]/ (or any other union of complementary character classes) and can be handy as JavaScript does not have a s modifier like others have to have . match line breaks too.

    Similar to that:

    /[]/

    This evaluates to an empty character set and can’t match anything at all.

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