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sindresorhus/is-regexp

Check if a value is a regular expression

JavaScript

26

16 commits

updated Sep 18, 2026

See the code

README

is-regexp

Check if a value is a regular expression

Install

$ npm install is-regexp

Usage

import isRegexp from 'is-regexp';

isRegexp('unicorn');
//=> false

isRegexp(/unicorn/);
//=> true

isRegexp(new RegExp('unicorn'));
//=> true

FAQ

Why not just use instanceof instead of this package?

  • is - Type check values
Get professional support for this package with a Tidelift subscription
Tidelift helps make open source sustainable for maintainers while giving companies
assurances about security, maintenance, and licensing for their dependencies.

Project health

Overall

3.5/10

Maintained

0/10

Code review

1/10
OpenSSF Scorecard

npm

is-regexp

Latest release

3.1.0 · Oct 31, 2021

Releases this year

0

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sindresorhus/is-regexp

Check if a value is a regular expression

JavaScript

26

16 commits

updated Sep 18, 2026

See the code

README

is-regexp

Check if a value is a regular expression

Install

$ npm install is-regexp

Usage

import isRegexp from 'is-regexp';

isRegexp('unicorn');
//=> false

isRegexp(/unicorn/);
//=> true

isRegexp(new RegExp('unicorn'));
//=> true

FAQ

Why not just use instanceof instead of this package?

  • is - Type check values
Get professional support for this package with a Tidelift subscription
Tidelift helps make open source sustainable for maintainers while giving companies
assurances about security, maintenance, and licensing for their dependencies.

Project health

Overall

3.5/10

Maintained

0/10

Code review

1/10
OpenSSF Scorecard

npm

is-regexp

Latest release

3.1.0 · Oct 31, 2021

Releases this year

0

Similar repos

sindresorhus/is-obj

Check if a value is an object

42

same org

sindresorhus/is-observable

Check if a value is an Observable

43

same org

inspect-js/is-regex

Is this value a JS regex?

24

sindresorhus/escape-string-regexp

Escape RegExp special characters

594

same org

sindresorhus/is-scoped

Check if a string is a scoped npm package name

25

same org

sindresorhus/p-is-promise

Check if something is a promise

45

same org

sindresorhus/has-emoji

Check whether a string has any emoji

106

same org

sindresorhus/is-url-superb

Check if a string is a URL

86

same org