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is-regex

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is-regex


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Package description

What is is-regex?

The is-regex npm package is a utility for checking if a value is a regular expression. It is primarily used to determine whether a given value is an instance of a RegExp object.

What are is-regex's main functionalities?

Check if a value is a RegExp

This feature allows you to verify if a value is a regular expression by returning a boolean result. It's useful when you need to ensure that a variable contains a valid RegExp object before performing operations that are specific to regular expressions.

const isRegex = require('is-regex');

console.log(isRegex(/abc/)); // true
console.log(isRegex('abc')); // false

Other packages similar to is-regex

Changelog

Source

v1.1.4 - 2021-08-05

Commits

  • [Dev Deps] update auto-changelog, core-js, eslint, tape 4b17cad
  • [Refactor] use has-tostringtag to behave correctly in the presence of symbol shams 2dad4af

Readme

Source

is-regex Version Badge

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Is this value a JS regex? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Example

var isRegex = require('is-regex');
var assert = require('assert');

assert.notOk(isRegex(undefined));
assert.notOk(isRegex(null));
assert.notOk(isRegex(false));
assert.notOk(isRegex(true));
assert.notOk(isRegex(42));
assert.notOk(isRegex('foo'));
assert.notOk(isRegex(function () {}));
assert.notOk(isRegex([]));
assert.notOk(isRegex({}));

assert.ok(isRegex(/a/g));
assert.ok(isRegex(new RegExp('a', 'g')));

Tests

Simply clone the repo, npm install, and run npm test

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FAQs

Last updated on 06 Aug 2021

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