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sindresorhus/is-regexp

GitHub
1 watchersOpen source

Last release:

A small JavaScript utility that checks whether a given value is a regular expression. Useful for input validation and type checks when you need to distinguish strings from RegExp instances.

Project status

  • The repo appears quiet and effectively in maintenance mode, with the last upstream update on 2021-10-31, far before today (2026-06-09).
  • Update cadence is infrequent historically, with major changes in 2019 and 2021, and no updates after late 2021.

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Recent updates

  • v3.1.0

    Release v3.1.0 is described as a tiny performance improvement. The code change primarily optimizes how the RegExp tag is checked, with no apparent API changes.

  • v3.0.0

    v3.0.0 raises the minimum supported Node.js version and converts the package to ESM-only. The runtime implementation is essentially the same logic, but module entry and TypeScript typings changed accordingly.

    Breaking

  • v2.1.0

    Release v2.1.0 adds TypeScript type definitions to the package. No other functionality changes or fixes are mentioned in the release notes.

    Features